// SPDX-License-Identifier: GPL-2.0-or-later
/*
* vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
* Copyright (C) 1992 Eric Youngdale
* Simulate a host adapter with 2 disks attached. Do a lot of checking
* to make sure that we are not getting blocks mixed up, and PANIC if
* anything out of the ordinary is seen.
* ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
*
* Copyright (C) 2001 - 2021 Douglas Gilbert
*
* For documentation see http://sg.danny.cz/sg/scsi_debug.html
*/
#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
#include <linux/module.h>
#include <linux/align.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/jiffies.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/proc_fs.h>
#include <linux/vmalloc.h>
#include <linux/moduleparam.h>
#include <linux/scatterlist.h>
#include <linux/blkdev.h>
#include <linux/crc-t10dif.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/atomic.h>
#include <linux/hrtimer.h>
#include <linux/uuid.h>
#include <linux/t10-pi.h>
#include <linux/msdos_partition.h>
#include <linux/random.h>
#include <linux/xarray.h>
#include <linux/prefetch.h>
#include <linux/debugfs.h>
#include <linux/async.h>
#include <linux/cleanup.h>
#include <net/checksum.h>
#include <linux/unaligned.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsicam.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_dbg.h>
#include "sd.h"
#include "scsi_logging.h"
/* make sure inq_product_rev string corresponds to this version */
#define SDEBUG_VERSION "0191" /* format to fit INQUIRY revision field */
static const char *sdebug_version_date = "20210520";
#define MY_NAME "scsi_debug"
/* Additional Sense Code (ASC) */
#define NO_ADDITIONAL_SENSE 0x0
#define OVERLAP_ATOMIC_COMMAND_ASC 0x0
#define OVERLAP_ATOMIC_COMMAND_ASCQ 0x23
#define LOGICAL_UNIT_NOT_READY 0x4
#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
#define UNRECOVERED_READ_ERR 0x11
#define PARAMETER_LIST_LENGTH_ERR 0x1a
#define INVALID_OPCODE 0x20
#define LBA_OUT_OF_RANGE 0x21
#define INVALID_FIELD_IN_CDB 0x24
#define INVALID_FIELD_IN_PARAM_LIST 0x26
#define WRITE_PROTECTED 0x27
#define UA_RESET_ASC 0x29
#define UA_CHANGED_ASC 0x2a
#define TARGET_CHANGED_ASC 0x3f
#define LUNS_CHANGED_ASCQ 0x0e
#define INSUFF_RES_ASC 0x55
#define INSUFF_RES_ASCQ 0x3
#define POWER_ON_RESET_ASCQ 0x0
#define POWER_ON_OCCURRED_ASCQ 0x1
#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
#define CAPACITY_CHANGED_ASCQ 0x9
#define SAVING_PARAMS_UNSUP 0x39
#define TRANSPORT_PROBLEM 0x4b
#define THRESHOLD_EXCEEDED 0x5d
#define LOW_POWER_COND_ON 0x5e
#define MISCOMPARE_VERIFY_ASC 0x1d
#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
#define WRITE_ERROR_ASC 0xc
#define UNALIGNED_WRITE_ASCQ 0x4
#define WRITE_BOUNDARY_ASCQ 0x5
#define READ_INVDATA_ASCQ 0x6
#define READ_BOUNDARY_ASCQ 0x7
#define ATTEMPT_ACCESS_GAP 0x9
#define INSUFF_ZONE_ASCQ 0xe
/* see drivers/scsi/sense_codes.h */
/* Additional Sense Code Qualifier (ASCQ) */
#define ACK_NAK_TO 0x3
/* Default values for driver parameters */
#define DEF_NUM_HOST 1
#define DEF_NUM_TGTS 1
#define DEF_MAX_LUNS 1
/* With these defaults, this driver will make 1 host with 1 target
* (id 0) containing 1 logical unit (lun 0). That is 1 device.
*/
#define DEF_ATO 1
#define DEF_CDB_LEN 10
#define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
#define DEF_DEV_SIZE_PRE_INIT 0
#define DEF_DEV_SIZE_MB 8
#define DEF_ZBC_DEV_SIZE_MB 128
#define DEF_DIF 0
#define DEF_DIX 0
#define DEF_PER_HOST_STORE false
#define DEF_D_SENSE 0
#define DEF_EVERY_NTH 0
#define DEF_FAKE_RW 0
#define DEF_GUARD 0
#define DEF_HOST_LOCK 0
#define DEF_LBPU 0
#define DEF_LBPWS 0
#define DEF_LBPWS10 0
#define DEF_LBPRZ 1
#define DEF_LOWEST_ALIGNED 0
#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
#define DEF_NO_LUN_0 0
#define DEF_NUM_PARTS 0
#define DEF_OPTS 0
#define DEF_OPT_BLKS 1024
#define DEF_PHYSBLK_EXP 0
#define DEF_OPT_XFERLEN_EXP 0
#define DEF_PTYPE TYPE_DISK
#define DEF_RANDOM false
#define DEF_REMOVABLE false
#define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
#define DEF_SECTOR_SIZE 512
#define DEF_UNMAP_ALIGNMENT 0
#define DEF_UNMAP_GRANULARITY 1
#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
#define DEF_UNMAP_MAX_DESC 256
#define DEF_VIRTUAL_GB 0
#define DEF_VPD_USE_HOSTNO 1
#define DEF_WRITESAME_LENGTH 0xFFFF
#define DEF_ATOMIC_WR 0
#define DEF_ATOMIC_WR_MAX_LENGTH 8192
#define DEF_ATOMIC_WR_ALIGN 2
#define DEF_ATOMIC_WR_GRAN 2
#define DEF_ATOMIC_WR_MAX_LENGTH_BNDRY (DEF_ATOMIC_WR_MAX_LENGTH)
#define DEF_ATOMIC_WR_MAX_BNDRY 128
#define DEF_STRICT 0
#define DEF_STATISTICS false
#define DEF_SUBMIT_QUEUES 1
#define DEF_TUR_MS_TO_READY 0
#define DEF_UUID_CTL 0
#define JDELAY_OVERRIDDEN -9999
/* Default parameters for ZBC drives */
#define DEF_ZBC_ZONE_SIZE_MB 128
#define DEF_ZBC_MAX_OPEN_ZONES 8
#define DEF_ZBC_NR_CONV_ZONES 1
#define SDEBUG_LUN_0_VAL 0
/* bit mask values for sdebug_opts */
#define SDEBUG_OPT_NOISE 1
#define SDEBUG_OPT_MEDIUM_ERR 2
#define SDEBUG_OPT_TIMEOUT 4
#define SDEBUG_OPT_RECOVERED_ERR 8
#define SDEBUG_OPT_TRANSPORT_ERR 16
#define SDEBUG_OPT_DIF_ERR 32
#define SDEBUG_OPT_DIX_ERR 64
#define SDEBUG_OPT_MAC_TIMEOUT 128
#define SDEBUG_OPT_SHORT_TRANSFER 0x100
#define SDEBUG_OPT_Q_NOISE 0x200
#define SDEBUG_OPT_ALL_TSF 0x400 /* ignore */
#define SDEBUG_OPT_RARE_TSF 0x800
#define SDEBUG_OPT_N_WCE 0x1000
#define SDEBUG_OPT_RESET_NOISE 0x2000
#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
#define SDEBUG_OPT_HOST_BUSY 0x8000
#define SDEBUG_OPT_CMD_ABORT 0x10000
#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
SDEBUG_OPT_RESET_NOISE)
#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
SDEBUG_OPT_TRANSPORT_ERR | \
SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
SDEBUG_OPT_SHORT_TRANSFER | \
SDEBUG_OPT_HOST_BUSY | \
SDEBUG_OPT_CMD_ABORT)
#define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \
SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR)
/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
* priority order. In the subset implemented here lower numbers have higher
* priority. The UA numbers should be a sequence starting from 0 with
* SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
#define SDEBUG_UA_POOCCUR 1 /* Power on occurred */
#define SDEBUG_UA_BUS_RESET 2
#define SDEBUG_UA_MODE_CHANGED 3
#define SDEBUG_UA_CAPACITY_CHANGED 4
#define SDEBUG_UA_LUNS_CHANGED 5
#define SDEBUG_UA_MICROCODE_CHANGED 6 /* simulate firmware change */
#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 7
#define SDEBUG_NUM_UAS 8
/* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
* sector on read commands: */
#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
/* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
* (for response) per submit queue at one time. Can be reduced by max_queue
* option. Command responses are not queued when jdelay=0 and ndelay=0. The
* per-device DEF_CMD_PER_LUN can be changed via sysfs:
* /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
* but cannot exceed SDEBUG_CANQUEUE .
*/
#define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
#define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
#define DEF_CMD_PER_LUN SDEBUG_CANQUEUE
/* UA - Unit Attention; SA - Service Action; SSU - Start Stop Unit */
#define F_D_IN 1 /* Data-in command (e.g. READ) */
#define F_D_OUT 2 /* Data-out command (e.g. WRITE) */
#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
#define F_D_UNKN 8
#define F_RL_WLUN_OK 0x10 /* allowed with REPORT LUNS W-LUN */
#define F_SKIP_UA 0x20 /* bypass UAs (e.g. INQUIRY command) */
#define F_DELAY_OVERR 0x40 /* for commands like INQUIRY */
#define F_SA_LOW 0x80 /* SA is in cdb byte 1, bits 4 to 0 */
#define F_SA_HIGH 0x100 /* SA is in cdb bytes 8 and 9 */
#define F_INV_OP 0x200 /* invalid opcode (not supported) */
#define F_FAKE_RW 0x400 /* bypass resp_*() when fake_rw set */
#define F_M_ACCESS 0x800 /* media access, reacts to SSU state */
#define F_SSU_DELAY 0x1000 /* SSU command delay (long-ish) */
#define F_SYNC_DELAY 0x2000 /* SYNCHRONIZE CACHE delay */
/* Useful combinations of the above flags */
#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
#define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW)
#define FF_SA (F_SA_HIGH | F_SA_LOW)
#define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY)
#define SDEBUG_MAX_PARTS 4
#define SDEBUG_MAX_CMD_LEN 32
#define SDEB_XA_NOT_IN_USE XA_MARK_1
static struct kmem_cache *queued_cmd_cache;
#define TO_QUEUED_CMD(scmd) ((void *)(scmd)->host_scribble)
#define ASSIGN_QUEUED_CMD(scmnd, qc) { (scmnd)->host_scribble = (void *) qc; }
/* Zone types (zbcr05 table 25) */
enum sdebug_z_type {
ZBC_ZTYPE_CNV = 0x1,
ZBC_ZTYPE_SWR = 0x2,
ZBC_ZTYPE_SWP = 0x3,
/* ZBC_ZTYPE_SOBR = 0x4, */
ZBC_ZTYPE_GAP = 0x5,
};
/* enumeration names taken from table 26, zbcr05 */
enum sdebug_z_cond {
ZBC_NOT_WRITE_POINTER = 0x0,
ZC1_EMPTY = 0x1,
ZC2_IMPLICIT_OPEN = 0x2,
ZC3_EXPLICIT_OPEN = 0x3,
ZC4_CLOSED = 0x4,
ZC6_READ_ONLY = 0xd,
ZC5_FULL = 0xe,
ZC7_OFFLINE = 0xf,
};
struct sdeb_zone_state { /* ZBC: per zone state */
enum sdebug_z_type z_type;
enum sdebug_z_cond z_cond;
bool z_non_seq_resource;
unsigned int z_size;
sector_t z_start;
sector_t z_wp;
};
enum sdebug_err_type {
ERR_TMOUT_CMD = 0, /* make specific scsi command timeout */
ERR_FAIL_QUEUE_CMD = 1, /* make specific scsi command's */
/* queuecmd return failed */
ERR_FAIL_CMD = 2, /* make specific scsi command's */
/* queuecmd return succeed but */
/* with errors set in scsi_cmnd */
ERR_ABORT_CMD_FAILED = 3, /* control return FAILED from */
/* scsi_debug_abort() */
ERR_LUN_RESET_FAILED = 4, /* control return FAILED from */
/* scsi_debug_device_reseLUN_RESET_FAILEDt() */
};
struct sdebug_err_inject {
int type;
struct list_head list;
int cnt;
unsigned char cmd;
struct rcu_head rcu;
union {
/*
* For ERR_FAIL_QUEUE_CMD
*/
int queuecmd_ret;
/*
* For ERR_FAIL_CMD
*/
struct {
unsigned char host_byte;
unsigned char driver_byte;
unsigned char status_byte;
unsigned char sense_key;
unsigned char asc;
unsigned char asq;
};
};
};
struct sdebug_dev_info {
struct list_head dev_list;
unsigned int channel;
unsigned int target;
u64 lun;
uuid_t lu_name;
struct sdebug_host_info *sdbg_host;
unsigned long uas_bm[1];
atomic_t stopped; /* 1: by SSU, 2: device start */
bool used;
/* For ZBC devices */
bool zoned;
unsigned int zcap;
unsigned int zsize;
unsigned int zsize_shift;
unsigned int nr_zones;
unsigned int nr_conv_zones;
unsigned int nr_seq_zones;
unsigned int nr_imp_open;
unsigned int nr_exp_open;
unsigned int nr_closed;
unsigned int max_open;
ktime_t create_ts; /* time since bootup that this device was created */
struct sdeb_zone_state *zstate;
struct dentry *debugfs_entry;
struct spinlock list_lock;
struct list_head inject_err_list;
};
struct sdebug_target_info {
bool reset_fail;
struct dentry *debugfs_entry;
};
struct sdebug_host_info {
struct list_head host_list;
int si_idx; /* sdeb_store_info (per host) xarray index */
struct Scsi_Host *shost;
struct device dev;
struct list_head dev_info_list;
};
/* There is an xarray of pointers to this struct's objects, one per host */
struct sdeb_store_info {
rwlock_t macc_data_lck; /* for media data access on this store */
rwlock_t macc_meta_lck; /* for atomic media meta access on this store */
rwlock_t macc_sector_lck; /* per-sector media data access on this store */
u8 *storep; /* user data storage (ram) */
struct t10_pi_tuple *dif_storep; /* protection info */
void *map_storep; /* provisioning map */
};
#define dev_to_sdebug_host(d) \
container_of(d, struct sdebug_host_info, dev)
#define shost_to_sdebug_host(shost) \
dev_to_sdebug_host(shost->dma_dev)
enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1,
SDEB_DEFER_WQ = 2, SDEB_DEFER_POLL = 3};
struct sdebug_defer {
struct hrtimer hrt;
struct execute_work ew;
ktime_t cmpl_ts;/* time since boot to complete this cmd */
int issuing_cpu;
bool aborted; /* true when blk_abort_request() already called */
enum sdeb_defer_type defer_t;
};
struct sdebug_device_access_info {
bool atomic_write;
u64 lba;
u32 num;
struct scsi_cmnd *self;
};
struct sdebug_queued_cmd {
/* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
* instance indicates this slot is in use.
*/
struct sdebug_defer sd_dp;
struct scsi_cmnd *scmd;
struct sdebug_device_access_info *i;
};
struct sdebug_scsi_cmd {
spinlock_t lock;
};
static atomic_t sdebug_cmnd_count; /* number of incoming commands */
static atomic_t sdebug_completions; /* count of deferred completions */
static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
static atomic_t sdeb_inject_pending;
static atomic_t sdeb_mq_poll_count; /* bumped when mq_poll returns > 0 */
struct opcode_info_t {
u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
/* for terminating element */
u8 opcode; /* if num_attached > 0, preferred */
u16 sa; /* service action */
u32 flags; /* OR-ed set of SDEB_F_* */
int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
const struct opcode_info_t *arrp; /* num_attached elements or NULL */
u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */
/* 1 to min(cdb_len, 15); ignore cdb[15...] */
};
/* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
enum sdeb_opcode_index {
SDEB_I_INVALID_OPCODE = 0,
SDEB_I_INQUIRY = 1,
SDEB_I_REPORT_LUNS = 2,
SDEB_I_REQUEST_SENSE = 3,
SDEB_I_TEST_UNIT_READY = 4,
SDEB_I_MODE_SENSE = 5, /* 6, 10 */
SDEB_I_MODE_SELECT = 6, /* 6, 10 */
SDEB_I_LOG_SENSE = 7,
SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
SDEB_I_READ = 9, /* 6, 10, 12, 16 */
SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
SDEB_I_START_STOP = 11,
SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */
SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */
SDEB_I_MAINT_IN = 14,
SDEB_I_MAINT_OUT = 15,
SDEB_I_VERIFY = 16, /* VERIFY(10), VERIFY(16) */
SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
SDEB_I_RESERVE = 18, /* 6, 10 */
SDEB_I_RELEASE = 19, /* 6, 10 */
SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
SDEB_I_ATA_PT = 22, /* 12, 16 */
SDEB_I_SEND_DIAG = 23,
SDEB_I_UNMAP = 24,
SDEB_I_WRITE_BUFFER = 25,
SDEB_I_WRITE_SAME = 26, /* 10, 16 */
SDEB_I_SYNC_CACHE = 27, /* 10, 16 */
SDEB_I_COMP_WRITE = 28,
SDEB_I_PRE_FETCH = 29, /* 10, 16 */
SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */
SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */
SDEB_I_ATOMIC_WRITE_16 = 32,
SDEB_I_LAST_ELEM_P1 = 33, /* keep this last (previous + 1) */
};
static const unsigned char opcode_ind_arr[256] = {
/* 0x0; 0x0->0x1f: 6 byte cdbs */
SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
0, 0, 0, 0,
SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
SDEB_I_RELEASE,
0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
SDEB_I_ALLOW_REMOVAL, 0,
/* 0x20; 0x20->0x3f: 10 byte cdbs */
0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
0, 0, 0, 0, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, 0,
0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
/* 0x40; 0x40->0x5f: 10 byte cdbs */
0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
SDEB_I_RELEASE,
0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
/* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, SDEB_I_VARIABLE_LEN,
/* 0x80; 0x80->0x9f: 16 byte cdbs */
0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0,
0, 0, 0, SDEB_I_VERIFY,
SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME,
SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0,
0, 0, 0, 0,
SDEB_I_ATOMIC_WRITE_16, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16,
/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
SDEB_I_MAINT_OUT, 0, 0, 0,
SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE,
0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
/* 0xc0; 0xc0->0xff: vendor specific */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
/*
* The following "response" functions return the SCSI mid-level's 4 byte
* tuple-in-an-int. To handle commands with an IMMED bit, for a faster
* command completion, they can mask their return value with
* SDEG_RES_IMMED_MASK .
*/
#define SDEG_RES_IMMED_MASK 0x40000000
static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_get_stream_status(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip);
static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_verify(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_atomic_write(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
static int sdebug_do_add_host(bool mk_new_store);
static int sdebug_add_host_helper(int per_host_idx);
static void sdebug_do_remove_host(bool the_end);
static int sdebug_add_store(void);
static void sdebug_erase_store(int idx, struct sdeb_store_info *sip);
static void sdebug_erase_all_stores(bool apart_from_first);
static void sdebug_free_queued_cmd(struct sdebug_queued_cmd *sqcp);
/*
* The following are overflow arrays for cdbs that "hit" the same index in
* the opcode_info_arr array. The most time sensitive (or commonly used) cdb
* should be placed in opcode_info_arr[], the others should be placed here.
*/
static const struct opcode_info_t msense_iarr[] = {
{0, 0x1a, 0, F_D_IN, NULL, NULL,
{6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
};
static const struct opcode_info_t mselect_iarr[] = {
{0, 0x15, 0, F_D_OUT, NULL, NULL,
{6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
};
static const struct opcode_info_t read_iarr[] = {
{0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */
{10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
0, 0, 0, 0} },
{0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */
{6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */
{12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf,
0xc7, 0, 0, 0, 0} },
};
static const struct opcode_info_t write_iarr[] = {
{0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */
NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7,
0, 0, 0, 0, 0, 0} },
{0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */
NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0} },
{0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */
NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xbf, 0xc7, 0, 0, 0, 0} },
};
static const struct opcode_info_t verify_iarr[] = {
{0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify,/* VERIFY(10) */
NULL, {10, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xc7,
0, 0, 0, 0, 0, 0} },
};
static const struct opcode_info_t sa_in_16_iarr[] = {
{0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
{16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */
{0, 0x9e, 0x16, F_SA_LOW | F_D_IN, resp_get_stream_status, NULL,
{16, 0x16, 0, 0, 0xff, 0xff, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff,
0, 0} }, /* GET STREAM STATUS */
};
static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
{0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0,
NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
{0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
};
static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */
{0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
{12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */
{0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
{12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */
};
static const struct opcode_info_t write_same_iarr[] = {
{0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL,
{16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */
};
static const struct opcode_info_t reserve_iarr[] = {
{0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
{6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
};
static const struct opcode_info_t release_iarr[] = {
{0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
{6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
};
static const struct opcode_info_t sync_cache_iarr[] = {
{0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL,
{16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */
};
static const struct opcode_info_t pre_fetch_iarr[] = {
{0, 0x90, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, NULL,
{16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */
};
static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */
{0, 0x94, 0x1, F_SA_LOW | F_M_ACCESS, resp_close_zone, NULL,
{16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */
{0, 0x94, 0x2, F_SA_LOW | F_M_ACCESS, resp_finish_zone, NULL,
{16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */
{0, 0x94, 0x4, F_SA_LOW | F_M_ACCESS, resp_rwp_zone, NULL,
{16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */
};
static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */
{0, 0x95, 0x6, F_SA_LOW | F_D_IN | F_M_ACCESS, NULL, NULL,
{16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */
};
/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
* plus the terminating elements for logic that scans this table such as
* REPORT SUPPORTED OPERATION CODES. */
static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = {
/* 0 */
{0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */
{6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
{12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
0, 0} }, /* REPORT LUNS */
{0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
{6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
{6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
/* 5 */
{ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */
resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0,
0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
{ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */
resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff,
0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
{0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */
{10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
0, 0, 0} },
{0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */
{10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
0, 0} },
{ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */
resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
/* 10 */
{ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO,
resp_write_dt0, write_iarr, /* WRITE(16) */
{16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
{0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */
{6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN,
resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */
{16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} },
{0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */
{ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN,
resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */
maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff,
0xff, 0, 0xc7, 0, 0, 0, 0} },
/* 15 */
{0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{ARRAY_SIZE(verify_iarr), 0x8f, 0,
F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify, /* VERIFY(16) */
verify_iarr, {16, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} },
{ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO,
resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */
{32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff,
0xff, 0xff} },
{ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT,
NULL, reserve_iarr, /* RESERVE(10) <no response function> */
{10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
0} },
{ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT,
NULL, release_iarr, /* RELEASE(10) <no response function> */
{10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
0} },
/* 20 */
{0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
{6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
{6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
{6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
{0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */
{10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
/* 25 */
{0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
{10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
0, 0, 0, 0} }, /* WRITE_BUFFER */
{ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO,
resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */
{10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0,
0, 0, 0, 0, 0} },
{ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS,
resp_sync_cache, sync_cache_iarr,
{10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
0, 0, 0, 0} }, /* SYNC_CACHE (10) */
{0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL,
{16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */
{ARRAY_SIZE(pre_fetch_iarr), 0x34, 0, F_SYNC_DELAY | FF_MEDIA_IO,
resp_pre_fetch, pre_fetch_iarr,
{10, 0x2, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
0, 0, 0, 0} }, /* PRE-FETCH (10) */
/* 30 */
{ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW | F_M_ACCESS,
resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */
{16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} },
{ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_M_ACCESS,
resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */
{16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} },
/* 31 */
{0, 0x0, 0x0, F_D_OUT | FF_MEDIA_IO,
resp_atomic_write, NULL, /* ATOMIC WRITE 16 */
{16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff} },
/* sentinel */
{0xff, 0, 0, 0, NULL, NULL, /* terminating element */
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
};
static int sdebug_num_hosts;
static int sdebug_add_host = DEF_NUM_HOST; /* in sysfs this is relative */
static int sdebug_ato = DEF_ATO;
static int sdebug_cdb_len = DEF_CDB_LEN;
static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
static int sdebug_dev_size_mb = DEF_DEV_SIZE_PRE_INIT;
static int sdebug_dif = DEF_DIF;
static int sdebug_dix = DEF_DIX;
static int sdebug_dsense = DEF_D_SENSE;
static int sdebug_every_nth = DEF_EVERY_NTH;
static int sdebug_fake_rw = DEF_FAKE_RW;
static unsigned int sdebug_guard = DEF_GUARD;
static int sdebug_host_max_queue; /* per host */
static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
static int sdebug_max_luns = DEF_MAX_LUNS;
static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR;
static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM;
static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
static int sdebug_no_lun_0 = DEF_NO_LUN_0;
static int sdebug_no_uld;
static int sdebug_num_parts = DEF_NUM_PARTS;
static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
static int sdebug_opt_blks = DEF_OPT_BLKS;
static int sdebug_opts = DEF_OPTS;
static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP;
static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
static int sdebug_scsi_level = DEF_SCSI_LEVEL;
static int sdebug_sector_size = DEF_SECTOR_SIZE;
static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY;
static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
static unsigned int sdebug_lbpu = DEF_LBPU;
static unsigned int sdebug_lbpws = DEF_LBPWS;
static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
static unsigned int sdebug_lbprz = DEF_LBPRZ;
static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
static unsigned int sdebug_atomic_wr = DEF_ATOMIC_WR;
static unsigned int sdebug_atomic_wr_max_length = DEF_ATOMIC_WR_MAX_LENGTH;
static unsigned int sdebug_atomic_wr_align = DEF_ATOMIC_WR_ALIGN;
static unsigned int sdebug_atomic_wr_gran = DEF_ATOMIC_WR_GRAN;
static unsigned int sdebug_atomic_wr_max_length_bndry =
DEF_ATOMIC_WR_MAX_LENGTH_BNDRY;
static unsigned int sdebug_atomic_wr_max_bndry = DEF_ATOMIC_WR_MAX_BNDRY;
static int sdebug_uuid_ctl = DEF_UUID_CTL;
static bool sdebug_random = DEF_RANDOM;
static bool sdebug_per_host_store = DEF_PER_HOST_STORE;
static bool sdebug_removable = DEF_REMOVABLE;
static bool sdebug_clustering;
static bool sdebug_host_lock = DEF_HOST_LOCK;
static bool sdebug_strict = DEF_STRICT;
static bool sdebug_any_injecting_opt;
static bool sdebug_no_rwlock;
static bool sdebug_verbose;
static bool have_dif_prot;
static bool write_since_sync;
static bool sdebug_statistics = DEF_STATISTICS;
static bool sdebug_wp;
static bool sdebug_allow_restart;
static enum {
BLK_ZONED_NONE = 0,
BLK_ZONED_HA = 1,
BLK_ZONED_HM = 2,
} sdeb_zbc_model = BLK_ZONED_NONE;
static char *sdeb_zbc_model_s;
enum sam_lun_addr_method {SAM_LUN_AM_PERIPHERAL = 0x0,
SAM_LUN_AM_FLAT = 0x1,
SAM_LUN_AM_LOGICAL_UNIT = 0x2,
SAM_LUN_AM_EXTENDED = 0x3};
static enum sam_lun_addr_method sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
static int sdebug_lun_am_i = (int)SAM_LUN_AM_PERIPHERAL;
static unsigned int sdebug_store_sectors;
static sector_t sdebug_capacity; /* in sectors */
/* old BIOS stuff, kernel may get rid of them but some mode sense pages
may still need them */
static int sdebug_heads; /* heads per disk */
static int sdebug_cylinders_per; /* cylinders per surface */
static int sdebug_sectors_per; /* sectors per cylinder */
static LIST_HEAD(sdebug_host_list);
static DEFINE_MUTEX(sdebug_host_list_mutex);
static struct xarray per_store_arr;
static struct xarray *per_store_ap = &per_store_arr;
static int sdeb_first_idx = -1; /* invalid index ==> none created */
static int sdeb_most_recent_idx = -1;
static DEFINE_RWLOCK(sdeb_fake_rw_lck); /* need a RW lock when fake_rw=1 */
static unsigned long map_size;
static int num_aborts;
static int num_dev_resets;
static int num_target_resets;
static int num_bus_resets;
static int num_host_resets;
static int dix_writes;
static int dix_reads;
static int dif_errors;
/* ZBC global data */
static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */
static int sdeb_zbc_zone_cap_mb;
static int sdeb_zbc_zone_size_mb;
static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES;
static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES;
static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
static int poll_queues; /* iouring iopoll interface.*/
static atomic_long_t writes_by_group_number[64];
static char sdebug_proc_name[] = MY_NAME;
static const char *my_name = MY_NAME;
static const struct bus_type pseudo_lld_bus;
static struct device_driver sdebug_driverfs_driver = {
.name = sdebug_proc_name,
.bus = &pseudo_lld_bus,
};
static const int check_condition_result =
SAM_STAT_CHECK_CONDITION;
static const int illegal_condition_result =
(DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
static const int device_qfull_result =
(DID_ABORT << 16) | SAM_STAT_TASK_SET_FULL;
static const int condition_met_result = SAM_STAT_CONDITION_MET;
static struct dentry *sdebug_debugfs_root;
static ASYNC_DOMAIN_EXCLUSIVE(sdebug_async_domain);
static void sdebug_err_free(struct rcu_head *head)
{
struct sdebug_err_inject *inject =
container_of(head, typeof(*inject), rcu);
kfree(inject);
}
static void sdebug_err_add(struct scsi_device *sdev, struct sdebug_err_inject *new)
{
struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata;
struct sdebug_err_inject *err;
spin_lock(&devip->list_lock);
list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
if (err->type == new->type && err->cmd == new->cmd) {
list_del_rcu(&err->list);
call_rcu(&err->rcu, sdebug_err_free);
}
}
list_add_tail_rcu(&new->list, &devip->inject_err_list);
spin_unlock(&devip->list_lock);
}
static int sdebug_err_remove(struct scsi_device *sdev, const char *buf, size_t count)
{
struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata;
struct sdebug_err_inject *err;
int type;
unsigned char cmd;
if (sscanf(buf, "- %d %hhx", &type, &cmd) != 2) {
kfree(buf);
return -EINVAL;
}
spin_lock(&devip->list_lock);
list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
if (err->type == type && err->cmd == cmd) {
list_del_rcu(&err->list);
call_rcu(&err->rcu, sdebug_err_free);
spin_unlock(&devip->list_lock);
kfree(buf);
return count;
}
}
spin_unlock(&devip->list_lock);
kfree(buf);
return -EINVAL;
}
static int sdebug_error_show(struct seq_file *m, void *p)
{
struct scsi_device *sdev = (struct scsi_device *)m->private;
struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata;
struct sdebug_err_inject *err;
seq_puts(m, "Type\tCount\tCommand\n");
rcu_read_lock();
list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
switch (err->type) {
case ERR_TMOUT_CMD:
case ERR_ABORT_CMD_FAILED:
case ERR_LUN_RESET_FAILED:
seq_printf(m, "%d\t%d\t0x%x\n", err->type, err->cnt,
err->cmd);
break;
case ERR_FAIL_QUEUE_CMD:
seq_printf(m, "%d\t%d\t0x%x\t0x%x\n", err->type,
err->cnt, err->cmd, err->queuecmd_ret);
break;
case ERR_FAIL_CMD:
seq_printf(m, "%d\t%d\t0x%x\t0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
err->type, err->cnt, err->cmd,
err->host_byte, err->driver_byte,
err->status_byte, err->sense_key,
err->asc, err->asq);
break;
}
}
rcu_read_unlock();
return 0;
}
static int sdebug_error_open(struct inode *inode, struct file *file)
{
return single_open(file, sdebug_error_show, inode->i_private);
}
static ssize_t sdebug_error_write(struct file *file, const char __user *ubuf,
size_t count, loff_t *ppos)
{
char *buf;
unsigned int inject_type;
struct sdebug_err_inject *inject;
struct scsi_device *sdev = (struct scsi_device *)file->f_inode->i_private;
buf = kzalloc(count + 1, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (copy_from_user(buf, ubuf, count)) {
kfree(buf);
return -EFAULT;
}
if (buf[0] == '-')
return sdebug_err_remove(sdev, buf, count);
if (sscanf(buf, "%d", &inject_type) != 1) {
kfree(buf);
return -EINVAL;
}
inject = kzalloc(sizeof(struct sdebug_err_inject), GFP_KERNEL);
if (!inject) {
kfree(buf);
return -ENOMEM;
}
switch (inject_type) {
case ERR_TMOUT_CMD:
case ERR_ABORT_CMD_FAILED:
case ERR_LUN_RESET_FAILED:
if (sscanf(buf, "%d %d %hhx", &inject->type, &inject->cnt,
&inject->cmd) != 3)
goto out_error;
break;
case ERR_FAIL_QUEUE_CMD:
if (sscanf(buf, "%d %d %hhx %x", &inject->type, &inject->cnt,
&inject->cmd, &inject->queuecmd_ret) != 4)
goto out_error;
break;
case ERR_FAIL_CMD:
if (sscanf(buf, "%d %d %hhx %hhx %hhx %hhx %hhx %hhx %hhx",
&inject->type, &inject->cnt, &inject->cmd,
&inject->host_byte, &inject->driver_byte,
&inject->status_byte, &inject->sense_key,
&inject->asc, &inject->asq) != 9)
goto out_error;
break;
default:
goto out_error;
break;
}
kfree(buf);
sdebug_err_add(sdev, inject);
return count;
out_error:
kfree(buf);
kfree(inject);
return -EINVAL;
}
static const struct file_operations sdebug_error_fops = {
.open = sdebug_error_open,
.read = seq_read,
.write = sdebug_error_write,
.release = single_release,
};
static int sdebug_target_reset_fail_show(struct seq_file *m, void *p)
{
struct scsi_target *starget = (struct scsi_target *)m->private;
struct sdebug_target_info *targetip =
(struct sdebug_target_info *)starget->hostdata;
if (targetip)
seq_printf(m, "%c\n", targetip->reset_fail ? 'Y' : 'N');
return 0;
}
static int sdebug_target_reset_fail_open(struct inode *inode, struct file *file)
{
return single_open(file, sdebug_target_reset_fail_show, inode->i_private);
}
static ssize_t sdebug_target_reset_fail_write(struct file *file,
const char __user *ubuf, size_t count, loff_t *ppos)
{
int ret;
struct scsi_target *starget =
(struct scsi_target *)file->f_inode->i_private;
struct sdebug_target_info *targetip =
(struct sdebug_target_info *)starget->hostdata;
if (targetip) {
ret = kstrtobool_from_user(ubuf, count, &targetip->reset_fail);
return ret < 0 ? ret : count;
}
return -ENODEV;
}
static const struct file_operations sdebug_target_reset_fail_fops = {
.open = sdebug_target_reset_fail_open,
.read = seq_read,
.write = sdebug_target_reset_fail_write,
.release = single_release,
};
static int sdebug_target_alloc(struct scsi_target *starget)
{
struct sdebug_target_info *targetip;
targetip = kzalloc(sizeof(struct sdebug_target_info), GFP_KERNEL);
if (!targetip)
return -ENOMEM;
async_synchronize_full_domain(&sdebug_async_domain);
targetip->debugfs_entry = debugfs_create_dir(dev_name(&starget->dev),
sdebug_debugfs_root);
debugfs_create_file("fail_reset", 0600, targetip->debugfs_entry, starget,
&sdebug_target_reset_fail_fops);
starget->hostdata = targetip;
return 0;
}
static void sdebug_tartget_cleanup_async(void *data, async_cookie_t cookie)
{
struct sdebug_target_info *targetip = data;
debugfs_remove(targetip->debugfs_entry);
kfree(targetip);
}
static void sdebug_target_destroy(struct scsi_target *starget)
{
struct sdebug_target_info *targetip;
targetip = (struct sdebug_target_info *)starget->hostdata;
if (targetip) {
starget->hostdata = NULL;
async_schedule_domain(sdebug_tartget_cleanup_async, targetip,
&sdebug_async_domain);
}
}
/* Only do the extra work involved in logical block provisioning if one or
* more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
* real reads and writes (i.e. not skipping them for speed).
*/
static inline bool scsi_debug_lbp(void)
{
return 0 == sdebug_fake_rw &&
(sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
}
static inline bool scsi_debug_atomic_write(void)
{
return sdebug_fake_rw == 0 && sdebug_atomic_wr;
}
static void *lba2fake_store(struct sdeb_store_info *sip,
unsigned long long lba)
{
struct sdeb_store_info *lsip = sip;
lba = do_div(lba, sdebug_store_sectors);
if (!sip || !sip->storep) {
WARN_ON_ONCE(true);
lsip = xa_load(per_store_ap, 0); /* should never be NULL */
}
return lsip->storep + lba * sdebug_sector_size;
}
static struct t10_pi_tuple *dif_store(struct sdeb_store_info *sip,
sector_t sector)
{
sector = sector_div(sector, sdebug_store_sectors);
return sip->dif_storep + sector;
}
static void sdebug_max_tgts_luns(void)
{
struct sdebug_host_info *sdbg_host;
struct Scsi_Host *hpnt;
mutex_lock(&sdebug_host_list_mutex);
list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
hpnt = sdbg_host->shost;
if ((hpnt->this_id >= 0) &&
(sdebug_num_tgts > hpnt->this_id))
hpnt->max_id = sdebug_num_tgts + 1;
else
hpnt->max_id = sdebug_num_tgts;
/* sdebug_max_luns; */
hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
}
mutex_unlock(&sdebug_host_list_mutex);
}
enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
/* Set in_bit to -1 to indicate no bit position of invalid field */
static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
enum sdeb_cmd_data c_d,
int in_byte, int in_bit)
{
unsigned char *sbuff;
u8 sks[4];
int sl, asc;
sbuff = scp->sense_buffer;
if (!sbuff) {
sdev_printk(KERN_ERR, scp->device,
"%s: sense_buffer is NULL\n", __func__);
return;
}
asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
scsi_build_sense(scp, sdebug_dsense, ILLEGAL_REQUEST, asc, 0);
memset(sks, 0, sizeof(sks));
sks[0] = 0x80;
if (c_d)
sks[0] |= 0x40;
if (in_bit >= 0) {
sks[0] |= 0x8;
sks[0] |= 0x7 & in_bit;
}
put_unaligned_be16(in_byte, sks + 1);
if (sdebug_dsense) {
sl = sbuff[7] + 8;
sbuff[7] = sl;
sbuff[sl] = 0x2;
sbuff[sl + 1] = 0x6;
memcpy(sbuff + sl + 4, sks, 3);
} else
memcpy(sbuff + 15, sks, 3);
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
"]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
}
static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
{
if (!scp->sense_buffer) {
sdev_printk(KERN_ERR, scp->device,
"%s: sense_buffer is NULL\n", __func__);
return;
}
memset(scp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
scsi_build_sense(scp, sdebug_dsense, key, asc, asq);
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device,
"%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
my_name, key, asc, asq);
}
static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
{
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
}
static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd,
void __user *arg)
{
if (sdebug_verbose) {
if (0x1261 == cmd)
sdev_printk(KERN_INFO, dev,
"%s: BLKFLSBUF [0x1261]\n", __func__);
else if (0x5331 == cmd)
sdev_printk(KERN_INFO, dev,
"%s: CDROM_GET_CAPABILITY [0x5331]\n",
__func__);
else
sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
__func__, cmd);
}
return -EINVAL;
/* return -ENOTTY; // correct return but upsets fdisk */
}
static void config_cdb_len(struct scsi_device *sdev)
{
switch (sdebug_cdb_len) {
case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */
sdev->use_10_for_rw = false;
sdev->use_16_for_rw = false;
sdev->use_10_for_ms = false;
break;
case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */
sdev->use_10_for_rw = true;
sdev->use_16_for_rw = false;
sdev->use_10_for_ms = false;
break;
case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */
sdev->use_10_for_rw = true;
sdev->use_16_for_rw = false;
sdev->use_10_for_ms = true;
break;
case 16:
sdev->use_10_for_rw = false;
sdev->use_16_for_rw = true;
sdev->use_10_for_ms = true;
break;
case 32: /* No knobs to suggest this so same as 16 for now */
sdev->use_10_for_rw = false;
sdev->use_16_for_rw = true;
sdev->use_10_for_ms = true;
break;
default:
pr_warn("unexpected cdb_len=%d, force to 10\n",
sdebug_cdb_len);
sdev->use_10_for_rw = true;
sdev->use_16_for_rw = false;
sdev->use_10_for_ms = false;
sdebug_cdb_len = 10;
break;
}
}
static void all_config_cdb_len(void)
{
struct sdebug_host_info *sdbg_host;
struct Scsi_Host *shost;
struct scsi_device *sdev;
mutex_lock(&sdebug_host_list_mutex);
list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
shost = sdbg_host->shost;
shost_for_each_device(sdev, shost) {
config_cdb_len(sdev);
}
}
mutex_unlock(&sdebug_host_list_mutex);
}
static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
{
struct sdebug_host_info *sdhp = devip->sdbg_host;
struct sdebug_dev_info *dp;
list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
if ((devip->sdbg_host == dp->sdbg_host) &&
(devip->target == dp->target)) {
clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
}
}
}
static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
{
int k;
k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
if (k != SDEBUG_NUM_UAS) {
const char *cp = NULL;
switch (k) {
case SDEBUG_UA_POR:
mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
POWER_ON_RESET_ASCQ);
if (sdebug_verbose)
cp = "power on reset";
break;
case SDEBUG_UA_POOCCUR:
mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
POWER_ON_OCCURRED_ASCQ);
if (sdebug_verbose)
cp = "power on occurred";
break;
case SDEBUG_UA_BUS_RESET:
mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
BUS_RESET_ASCQ);
if (sdebug_verbose)
cp = "bus reset";
break;
case SDEBUG_UA_MODE_CHANGED:
mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
MODE_CHANGED_ASCQ);
if (sdebug_verbose)
cp = "mode parameters changed";
break;
case SDEBUG_UA_CAPACITY_CHANGED:
mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
CAPACITY_CHANGED_ASCQ);
if (sdebug_verbose)
cp = "capacity data changed";
break;
case SDEBUG_UA_MICROCODE_CHANGED:
mk_sense_buffer(scp, UNIT_ATTENTION,
TARGET_CHANGED_ASC,
MICROCODE_CHANGED_ASCQ);
if (sdebug_verbose)
cp = "microcode has been changed";
break;
case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
mk_sense_buffer(scp, UNIT_ATTENTION,
TARGET_CHANGED_ASC,
MICROCODE_CHANGED_WO_RESET_ASCQ);
if (sdebug_verbose)
cp = "microcode has been changed without reset";
break;
case SDEBUG_UA_LUNS_CHANGED:
/*
* SPC-3 behavior is to report a UNIT ATTENTION with
* ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
* on the target, until a REPORT LUNS command is
* received. SPC-4 behavior is to report it only once.
* NOTE: sdebug_scsi_level does not use the same
* values as struct scsi_device->scsi_level.
*/
if (sdebug_scsi_level >= 6) /* SPC-4 and above */
clear_luns_changed_on_target(devip);
mk_sense_buffer(scp, UNIT_ATTENTION,
TARGET_CHANGED_ASC,
LUNS_CHANGED_ASCQ);
if (sdebug_verbose)
cp = "reported luns data has changed";
break;
default:
pr_warn("unexpected unit attention code=%d\n", k);
if (sdebug_verbose)
cp = "unknown";
break;
}
clear_bit(k, devip->uas_bm);
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device,
"%s reports: Unit attention: %s\n",
my_name, cp);
return check_condition_result;
}
return 0;
}
/* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
int arr_len)
{
int act_len;
struct scsi_data_buffer *sdb = &scp->sdb;
if (!sdb->length)
return 0;
if (scp->sc_data_direction != DMA_FROM_DEVICE)
return DID_ERROR << 16;
act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
arr, arr_len);
scsi_set_resid(scp, scsi_bufflen(scp) - act_len);
return 0;
}
/* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
* (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
* calls, not required to write in ascending offset order. Assumes resid
* set to scsi_bufflen() prior to any calls.
*/
static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
int arr_len, unsigned int off_dst)
{
unsigned int act_len, n;
struct scsi_data_buffer *sdb = &scp->sdb;
off_t skip = off_dst;
if (sdb->length <= off_dst)
return 0;
if (scp->sc_data_direction != DMA_FROM_DEVICE)
return DID_ERROR << 16;
act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
arr, arr_len, skip);
pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
__func__, off_dst, scsi_bufflen(scp), act_len,
scsi_get_resid(scp));
n = scsi_bufflen(scp) - (off_dst + act_len);
scsi_set_resid(scp, min_t(u32, scsi_get_resid(scp), n));
return 0;
}
/* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
* 'arr' or -1 if error.
*/
static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
int arr_len)
{
if (!scsi_bufflen(scp))
return 0;
if (scp->sc_data_direction != DMA_TO_DEVICE)
return -1;
return scsi_sg_copy_to_buffer(scp, arr, arr_len);
}
static char sdebug_inq_vendor_id[9] = "Linux ";
static char sdebug_inq_product_id[17] = "scsi_debug ";
static char sdebug_inq_product_rev[5] = SDEBUG_VERSION;
/* Use some locally assigned NAAs for SAS addresses. */
static const u64 naa3_comp_a = 0x3222222000000000ULL;
static const u64 naa3_comp_b = 0x3333333000000000ULL;
static const u64 naa3_comp_c = 0x3111111000000000ULL;
/* Device identification VPD page. Returns number of bytes placed in arr */
static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
int target_dev_id, int dev_id_num,
const char *dev_id_str, int dev_id_str_len,
const uuid_t *lu_name)
{
int num, port_a;
char b[32];
port_a = target_dev_id + 1;
/* T10 vendor identifier field format (faked) */
arr[0] = 0x2; /* ASCII */
arr[1] = 0x1;
arr[2] = 0x0;
memcpy(&arr[4], sdebug_inq_vendor_id, 8);
memcpy(&arr[12], sdebug_inq_product_id, 16);
memcpy(&arr[28], dev_id_str, dev_id_str_len);
num = 8 + 16 + dev_id_str_len;
arr[3] = num;
num += 4;
if (dev_id_num >= 0) {
if (sdebug_uuid_ctl) {
/* Locally assigned UUID */
arr[num++] = 0x1; /* binary (not necessarily sas) */
arr[num++] = 0xa; /* PIV=0, lu, naa */
arr[num++] = 0x0;
arr[num++] = 0x12;
arr[num++] = 0x10; /* uuid type=1, locally assigned */
arr[num++] = 0x0;
memcpy(arr + num, lu_name, 16);
num += 16;
} else {
/* NAA-3, Logical unit identifier (binary) */
arr[num++] = 0x1; /* binary (not necessarily sas) */
arr[num++] = 0x3; /* PIV=0, lu, naa */
arr[num++] = 0x0;
arr[num++] = 0x8;
put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
num += 8;
}
/* Target relative port number */
arr[num++] = 0x61; /* proto=sas, binary */
arr[num++] = 0x94; /* PIV=1, target port, rel port */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x4; /* length */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0;
arr[num++] = 0x1; /* relative port A */
}
/* NAA-3, Target port identifier */
arr[num++] = 0x61; /* proto=sas, binary */
arr[num++] = 0x93; /* piv=1, target port, naa */
arr[num++] = 0x0;
arr[num++] = 0x8;
put_unaligned_be64(naa3_comp_a + port_a, arr + num);
num += 8;
/* NAA-3, Target port group identifier */
arr[num++] = 0x61; /* proto=sas, binary */
arr[num++] = 0x95; /* piv=1, target port group id */
arr[num++] = 0x0;
arr[num++] = 0x4;
arr[num++] = 0;
arr[num++] = 0;
put_unaligned_be16(port_group_id, arr + num);
num += 2;
/* NAA-3, Target device identifier */
arr[num++] = 0x61; /* proto=sas, binary */
arr[num++] = 0xa3; /* piv=1, target device, naa */
arr[num++] = 0x0;
arr[num++] = 0x8;
put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
num += 8;
/* SCSI name string: Target device identifier */
arr[num++] = 0x63; /* proto=sas, UTF-8 */
arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
arr[num++] = 0x0;
arr[num++] = 24;
memcpy(arr + num, "naa.32222220", 12);
num += 12;
snprintf(b, sizeof(b), "%08X", target_dev_id);
memcpy(arr + num, b, 8);
num += 8;
memset(arr + num, 0, 4);
num += 4;
return num;
}
static unsigned char vpd84_data[] = {
/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
0x22,0x22,0x22,0x0,0xbb,0x1,
0x22,0x22,0x22,0x0,0xbb,0x2,
};
/* Software interface identification VPD page */
static int inquiry_vpd_84(unsigned char *arr)
{
memcpy(arr, vpd84_data, sizeof(vpd84_data));
return sizeof(vpd84_data);
}
/* Management network addresses VPD page */
static int inquiry_vpd_85(unsigned char *arr)
{
int num = 0;
const char *na1 = "https://www.kernel.org/config";
const char *na2 = "http://www.kernel.org/log";
int plen, olen;
arr[num++] = 0x1; /* lu, storage config */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0;
olen = strlen(na1);
plen = olen + 1;
if (plen % 4)
plen = ((plen / 4) + 1) * 4;
arr[num++] = plen; /* length, null termianted, padded */
memcpy(arr + num, na1, olen);
memset(arr + num + olen, 0, plen - olen);
num += plen;
arr[num++] = 0x4; /* lu, logging */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0;
olen = strlen(na2);
plen = olen + 1;
if (plen % 4)
plen = ((plen / 4) + 1) * 4;
arr[num++] = plen; /* length, null terminated, padded */
memcpy(arr + num, na2, olen);
memset(arr + num + olen, 0, plen - olen);
num += plen;
return num;
}
/* SCSI ports VPD page */
static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
{
int num = 0;
int port_a, port_b;
port_a = target_dev_id + 1;
port_b = port_a + 1;
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0;
arr[num++] = 0x1; /* relative port 1 (primary) */
memset(arr + num, 0, 6);
num += 6;
arr[num++] = 0x0;
arr[num++] = 12; /* length tp descriptor */
/* naa-5 target port identifier (A) */
arr[num++] = 0x61; /* proto=sas, binary */
arr[num++] = 0x93; /* PIV=1, target port, NAA */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x8; /* length */
put_unaligned_be64(naa3_comp_a + port_a, arr + num);
num += 8;
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x0;
arr[num++] = 0x2; /* relative port 2 (secondary) */
memset(arr + num, 0, 6);
num += 6;
arr[num++] = 0x0;
arr[num++] = 12; /* length tp descriptor */
/* naa-5 target port identifier (B) */
arr[num++] = 0x61; /* proto=sas, binary */
arr[num++] = 0x93; /* PIV=1, target port, NAA */
arr[num++] = 0x0; /* reserved */
arr[num++] = 0x8; /* length */
put_unaligned_be64(naa3_comp_a + port_b, arr + num);
num += 8;
return num;
}
static unsigned char vpd89_data[] = {
/* from 4th byte */ 0,0,0,0,
'l','i','n','u','x',' ',' ',' ',
'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
'1','2','3','4',
0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
0xec,0,0,0,
0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
0x53,0x41,
0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
0x20,0x20,
0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
0x10,0x80,
0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
};
/* ATA Information VPD page */
static int inquiry_vpd_89(unsigned char *arr)
{
memcpy(arr, vpd89_data, sizeof(vpd89_data));
return sizeof(vpd89_data);
}
static unsigned char vpdb0_data[] = {
/* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
};
/* Block limits VPD page (SBC-3) */
static int inquiry_vpd_b0(unsigned char *arr)
{
unsigned int gran;
memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
/* Optimal transfer length granularity */
if (sdebug_opt_xferlen_exp != 0 &&
sdebug_physblk_exp < sdebug_opt_xferlen_exp)
gran = 1 << sdebug_opt_xferlen_exp;
else
gran = 1 << sdebug_physblk_exp;
put_unaligned_be16(gran, arr + 2);
/* Maximum Transfer Length */
if (sdebug_store_sectors > 0x400)
put_unaligned_be32(sdebug_store_sectors, arr + 4);
/* Optimal Transfer Length */
put_unaligned_be32(sdebug_opt_blks, &arr[8]);
if (sdebug_lbpu) {
/* Maximum Unmap LBA Count */
put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
/* Maximum Unmap Block Descriptor Count */
put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
}
/* Unmap Granularity Alignment */
if (sdebug_unmap_alignment) {
put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
arr[28] |= 0x80; /* UGAVALID */
}
/* Optimal Unmap Granularity */
put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
/* Maximum WRITE SAME Length */
put_unaligned_be64(sdebug_write_same_length, &arr[32]);
if (sdebug_atomic_wr) {
put_unaligned_be32(sdebug_atomic_wr_max_length, &arr[40]);
put_unaligned_be32(sdebug_atomic_wr_align, &arr[44]);
put_unaligned_be32(sdebug_atomic_wr_gran, &arr[48]);
put_unaligned_be32(sdebug_atomic_wr_max_length_bndry, &arr[52]);
put_unaligned_be32(sdebug_atomic_wr_max_bndry, &arr[56]);
}
return 0x3c; /* Mandatory page length for Logical Block Provisioning */
}
/* Block device characteristics VPD page (SBC-3) */
static int inquiry_vpd_b1(struct sdebug_dev_info *devip, unsigned char *arr)
{
memset(arr, 0, 0x3c);
arr[0] = 0;
arr[1] = 1; /* non rotating medium (e.g. solid state) */
arr[2] = 0;
arr[3] = 5; /* less than 1.8" */
return 0x3c;
}
/* Logical block provisioning VPD page (SBC-4) */
static int inquiry_vpd_b2(unsigned char *arr)
{
memset(arr, 0, 0x4);
arr[0] = 0; /* threshold exponent */
if (sdebug_lbpu)
arr[1] = 1 << 7;
if (sdebug_lbpws)
arr[1] |= 1 << 6;
if (sdebug_lbpws10)
arr[1] |= 1 << 5;
if (sdebug_lbprz && scsi_debug_lbp())
arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
/* anc_sup=0; dp=0 (no provisioning group descriptor) */
/* minimum_percentage=0; provisioning_type=0 (unknown) */
/* threshold_percentage=0 */
return 0x4;
}
/* Zoned block device characteristics VPD page (ZBC mandatory) */
static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr)
{
memset(arr, 0, 0x3c);
arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */
/*
* Set Optimal number of open sequential write preferred zones and
* Optimal number of non-sequentially written sequential write
* preferred zones fields to 'not reported' (0xffffffff). Leave other
* fields set to zero, apart from Max. number of open swrz_s field.
*/
put_unaligned_be32(0xffffffff, &arr[4]);
put_unaligned_be32(0xffffffff, &arr[8]);
if (sdeb_zbc_model == BLK_ZONED_HM && devip->max_open)
put_unaligned_be32(devip->max_open, &arr[12]);
else
put_unaligned_be32(0xffffffff, &arr[12]);
if (devip->zcap < devip->zsize) {
arr[19] = ZBC_CONSTANT_ZONE_START_OFFSET;
put_unaligned_be64(devip->zsize, &arr[20]);
} else {
arr[19] = 0;
}
return 0x3c;
}
#define SDEBUG_BLE_LEN_AFTER_B4 28 /* thus vpage 32 bytes long */
enum { MAXIMUM_NUMBER_OF_STREAMS = 6, PERMANENT_STREAM_COUNT = 5 };
/* Block limits extension VPD page (SBC-4) */
static int inquiry_vpd_b7(unsigned char *arrb4)
{
memset(arrb4, 0, SDEBUG_BLE_LEN_AFTER_B4);
arrb4[1] = 1; /* Reduced stream control support (RSCS) */
put_unaligned_be16(MAXIMUM_NUMBER_OF_STREAMS, &arrb4[2]);
return SDEBUG_BLE_LEN_AFTER_B4;
}
#define SDEBUG_LONG_INQ_SZ 96
#define SDEBUG_MAX_INQ_ARR_SZ 584
static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
{
unsigned char pq_pdt;
unsigned char *arr;
unsigned char *cmd = scp->cmnd;
u32 alloc_len, n;
int ret;
bool have_wlun, is_disk, is_zbc, is_disk_zbc;
alloc_len = get_unaligned_be16(cmd + 3);
arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
if (! arr)
return DID_REQUEUE << 16;
is_disk = (sdebug_ptype == TYPE_DISK);
is_zbc = devip->zoned;
is_disk_zbc = (is_disk || is_zbc);
have_wlun = scsi_is_wlun(scp->device->lun);
if (have_wlun)
pq_pdt = TYPE_WLUN; /* present, wlun */
else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
else
pq_pdt = (sdebug_ptype & 0x1f);
arr[0] = pq_pdt;
if (0x2 & cmd[1]) { /* CMDDT bit set */
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
kfree(arr);
return check_condition_result;
} else if (0x1 & cmd[1]) { /* EVPD bit set */
int lu_id_num, port_group_id, target_dev_id;
u32 len;
char lu_id_str[6];
int host_no = devip->sdbg_host->shost->host_no;
arr[1] = cmd[2];
port_group_id = (((host_no + 1) & 0x7f) << 8) +
(devip->channel & 0x7f);
if (sdebug_vpd_use_hostno == 0)
host_no = 0;
lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
(devip->target * 1000) + devip->lun);
target_dev_id = ((host_no + 1) * 2000) +
(devip->target * 1000) - 3;
len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
if (0 == cmd[2]) { /* supported vital product data pages */
n = 4;
arr[n++] = 0x0; /* this page */
arr[n++] = 0x80; /* unit serial number */
arr[n++] = 0x83; /* device identification */
arr[n++] = 0x84; /* software interface ident. */
arr[n++] = 0x85; /* management network addresses */
arr[n++] = 0x86; /* extended inquiry */
arr[n++] = 0x87; /* mode page policy */
arr[n++] = 0x88; /* SCSI ports */
if (is_disk_zbc) { /* SBC or ZBC */
arr[n++] = 0x89; /* ATA information */
arr[n++] = 0xb0; /* Block limits */
arr[n++] = 0xb1; /* Block characteristics */
if (is_disk)
arr[n++] = 0xb2; /* LB Provisioning */
if (is_zbc)
arr[n++] = 0xb6; /* ZB dev. char. */
arr[n++] = 0xb7; /* Block limits extension */
}
arr[3] = n - 4; /* number of supported VPD pages */
} else if (0x80 == cmd[2]) { /* unit serial number */
arr[3] = len;
memcpy(&arr[4], lu_id_str, len);
} else if (0x83 == cmd[2]) { /* device identification */
arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
target_dev_id, lu_id_num,
lu_id_str, len,
&devip->lu_name);
} else if (0x84 == cmd[2]) { /* Software interface ident. */
arr[3] = inquiry_vpd_84(&arr[4]);
} else if (0x85 == cmd[2]) { /* Management network addresses */
arr[3] = inquiry_vpd_85(&arr[4]);
} else if (0x86 == cmd[2]) { /* extended inquiry */
arr[3] = 0x3c; /* number of following entries */
if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
arr[4] = 0x4; /* SPT: GRD_CHK:1 */
else if (have_dif_prot)
arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
else
arr[4] = 0x0; /* no protection stuff */
/*
* GROUP_SUP=1; HEADSUP=1 (HEAD OF QUEUE); ORDSUP=1
* (ORDERED queuing); SIMPSUP=1 (SIMPLE queuing).
*/
arr[5] = 0x17;
} else if (0x87 == cmd[2]) { /* mode page policy */
arr[3] = 0x8; /* number of following entries */
arr[4] = 0x2; /* disconnect-reconnect mp */
arr[6] = 0x80; /* mlus, shared */
arr[8] = 0x18; /* protocol specific lu */
arr[10] = 0x82; /* mlus, per initiator port */
} else if (0x88 == cmd[2]) { /* SCSI Ports */
arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
} else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */
n = inquiry_vpd_89(&arr[4]);
put_unaligned_be16(n, arr + 2);
} else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */
arr[3] = inquiry_vpd_b0(&arr[4]);
} else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */
arr[3] = inquiry_vpd_b1(devip, &arr[4]);
} else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
arr[3] = inquiry_vpd_b2(&arr[4]);
} else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */
arr[3] = inquiry_vpd_b6(devip, &arr[4]);
} else if (cmd[2] == 0xb7) { /* block limits extension page */
arr[3] = inquiry_vpd_b7(&arr[4]);
} else {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
kfree(arr);
return check_condition_result;
}
len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len);
ret = fill_from_dev_buffer(scp, arr,
min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ));
kfree(arr);
return ret;
}
/* drops through here for a standard inquiry */
arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
arr[2] = sdebug_scsi_level;
arr[3] = 2; /* response_data_format==2 */
arr[4] = SDEBUG_LONG_INQ_SZ - 5;
arr[5] = (int)have_dif_prot; /* PROTECT bit */
if (sdebug_vpd_use_hostno == 0)
arr[5] |= 0x10; /* claim: implicit TPGS */
arr[6] = 0x10; /* claim: MultiP */
/* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
arr[7] = 0xa; /* claim: LINKED + CMDQUE */
memcpy(&arr[8], sdebug_inq_vendor_id, 8);
memcpy(&arr[16], sdebug_inq_product_id, 16);
memcpy(&arr[32], sdebug_inq_product_rev, 4);
/* Use Vendor Specific area to place driver date in ASCII hex */
memcpy(&arr[36], sdebug_version_date, 8);
/* version descriptors (2 bytes each) follow */
put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
n = 62;
if (is_disk) { /* SBC-4 no version claimed */
put_unaligned_be16(0x600, arr + n);
n += 2;
} else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
put_unaligned_be16(0x525, arr + n);
n += 2;
} else if (is_zbc) { /* ZBC BSR INCITS 536 revision 05 */
put_unaligned_be16(0x624, arr + n);
n += 2;
}
put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
ret = fill_from_dev_buffer(scp, arr,
min_t(u32, alloc_len, SDEBUG_LONG_INQ_SZ));
kfree(arr);
return ret;
}
/* See resp_iec_m_pg() for how this data is manipulated */
static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
0, 0, 0x0, 0x0};
static int resp_requests(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
unsigned char *cmd = scp->cmnd;
unsigned char arr[SCSI_SENSE_BUFFERSIZE]; /* assume >= 18 bytes */
bool dsense = !!(cmd[1] & 1);
u32 alloc_len = cmd[4];
u32 len = 18;
int stopped_state = atomic_read(&devip->stopped);
memset(arr, 0, sizeof(arr));
if (stopped_state > 0) { /* some "pollable" data [spc6r02: 5.12.2] */
if (dsense) {
arr[0] = 0x72;
arr[1] = NOT_READY;
arr[2] = LOGICAL_UNIT_NOT_READY;
arr[3] = (stopped_state == 2) ? 0x1 : 0x2;
len = 8;
} else {
arr[0] = 0x70;
arr[2] = NOT_READY; /* NO_SENSE in sense_key */
arr[7] = 0xa; /* 18 byte sense buffer */
arr[12] = LOGICAL_UNIT_NOT_READY;
arr[13] = (stopped_state == 2) ? 0x1 : 0x2;
}
} else if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
/* Information exceptions control mode page: TEST=1, MRIE=6 */
if (dsense) {
arr[0] = 0x72;
arr[1] = 0x0; /* NO_SENSE in sense_key */
arr[2] = THRESHOLD_EXCEEDED;
arr[3] = 0xff; /* Failure prediction(false) */
len = 8;
} else {
arr[0] = 0x70;
arr[2] = 0x0; /* NO_SENSE in sense_key */
arr[7] = 0xa; /* 18 byte sense buffer */
arr[12] = THRESHOLD_EXCEEDED;
arr[13] = 0xff; /* Failure prediction(false) */
}
} else { /* nothing to report */
if (dsense) {
len = 8;
memset(arr, 0, len);
arr[0] = 0x72;
} else {
memset(arr, 0, len);
arr[0] = 0x70;
arr[7] = 0xa;
}
}
return fill_from_dev_buffer(scp, arr, min_t(u32, len, alloc_len));
}
static int resp_start_stop(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
{
unsigned char *cmd = scp->cmnd;
int power_cond, want_stop, stopped_state;
bool changing;
power_cond = (cmd[4] & 0xf0) >> 4;
if (power_cond) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
return check_condition_result;
}
want_stop = !(cmd[4] & 1);
stopped_state = atomic_read(&devip->stopped);
if (stopped_state == 2) {
ktime_t now_ts = ktime_get_boottime();
if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
u64 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
/* tur_ms_to_ready timer extinguished */
atomic_set(&devip->stopped, 0);
stopped_state = 0;
}
}
if (stopped_state == 2) {
if (want_stop) {
stopped_state = 1; /* dummy up success */
} else { /* Disallow tur_ms_to_ready delay to be overridden */
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 0 /* START bit */);
return check_condition_result;
}
}
}
changing = (stopped_state != want_stop);
if (changing)
atomic_xchg(&devip->stopped, want_stop);
if (!changing || (cmd[1] & 0x1)) /* state unchanged or IMMED bit set in cdb */
return SDEG_RES_IMMED_MASK;
else
return 0;
}
static sector_t get_sdebug_capacity(void)
{
static const unsigned int gibibyte = 1073741824;
if (sdebug_virtual_gb > 0)
return (sector_t)sdebug_virtual_gb *
(gibibyte / sdebug_sector_size);
else
return sdebug_store_sectors;
}
#define SDEBUG_READCAP_ARR_SZ 8
static int resp_readcap(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
unsigned char arr[SDEBUG_READCAP_ARR_SZ];
unsigned int capac;
/* following just in case virtual_gb changed */
sdebug_capacity = get_sdebug_capacity();
memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
if (sdebug_capacity < 0xffffffff) {
capac = (unsigned int)sdebug_capacity - 1;
put_unaligned_be32(capac, arr + 0);
} else
put_unaligned_be32(0xffffffff, arr + 0);
put_unaligned_be16(sdebug_sector_size, arr + 6);
return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
}
#define SDEBUG_READCAP16_ARR_SZ 32
static int resp_readcap16(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
unsigned char *cmd = scp->cmnd;
unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
u32 alloc_len;
alloc_len = get_unaligned_be32(cmd + 10);
/* following just in case virtual_gb changed */
sdebug_capacity = get_sdebug_capacity();
memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
put_unaligned_be32(sdebug_sector_size, arr + 8);
arr[13] = sdebug_physblk_exp & 0xf;
arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
if (scsi_debug_lbp()) {
arr[14] |= 0x80; /* LBPME */
/* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
* the LB Provisioning VPD page is 3 bits. Note that lbprz=2
* in the wider field maps to 0 in this field.
*/
if (sdebug_lbprz & 1) /* precisely what the draft requires */
arr[14] |= 0x40;
}
/*
* Since the scsi_debug READ CAPACITY implementation always reports the
* total disk capacity, set RC BASIS = 1 for host-managed ZBC devices.
*/
if (devip->zoned)
arr[12] |= 1 << 4;
arr[15] = sdebug_lowest_aligned & 0xff;
if (have_dif_prot) {
arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
arr[12] |= 1; /* PROT_EN */
}
return fill_from_dev_buffer(scp, arr,
min_t(u32, alloc_len, SDEBUG_READCAP16_ARR_SZ));
}
#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
static int resp_report_tgtpgs(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
unsigned char *cmd = scp->cmnd;
unsigned char *arr;
int host_no = devip->sdbg_host->shost->host_no;
int port_group_a, port_group_b, port_a, port_b;
u32 alen, n, rlen;
int ret;
alen = get_unaligned_be32(cmd + 6);
arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
if (! arr)
return DID_REQUEUE << 16;
/*
* EVPD page 0x88 states we have two ports, one
* real and a fake port with no device connected.
* So we create two port groups with one port each
* and set the group with port B to unavailable.
*/
port_a = 0x1; /* relative port A */
port_b = 0x2; /* relative port B */
port_group_a = (((host_no + 1) & 0x7f) << 8) +
(devip->channel & 0x7f);
port_group_b = (((host_no + 1) & 0x7f) << 8) +
(devip->channel & 0x7f) + 0x80;
/*
* The asymmetric access state is cycled according to the host_id.
*/
n = 4;
if (sdebug_vpd_use_hostno == 0) {
arr[n++] = host_no % 3; /* Asymm access state */
arr[n++] = 0x0F; /* claim: all states are supported */
} else {
arr[n++] = 0x0; /* Active/Optimized path */
arr[n++] = 0x01; /* only support active/optimized paths */
}
put_unaligned_be16(port_group_a, arr + n);
n += 2;
arr[n++] = 0; /* Reserved */
arr[n++] = 0; /* Status code */
arr[n++] = 0; /* Vendor unique */
arr[n++] = 0x1; /* One port per group */
arr[n++] = 0; /* Reserved */
arr[n++] = 0; /* Reserved */
put_unaligned_be16(port_a, arr + n);
n += 2;
arr[n++] = 3; /* Port unavailable */
arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
put_unaligned_be16(port_group_b, arr + n);
n += 2;
arr[n++] = 0; /* Reserved */
arr[n++] = 0; /* Status code */
arr[n++] = 0; /* Vendor unique */
arr[n++] = 0x1; /* One port per group */
arr[n++] = 0; /* Reserved */
arr[n++] = 0; /* Reserved */
put_unaligned_be16(port_b, arr + n);
n += 2;
rlen = n - 4;
put_unaligned_be32(rlen, arr + 0);
/*
* Return the smallest value of either
* - The allocated length
* - The constructed command length
* - The maximum array size
*/
rlen = min(alen, n);
ret = fill_from_dev_buffer(scp, arr,
min_t(u32, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
kfree(arr);
return ret;
}
static int resp_rsup_opcodes(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
bool rctd;
u8 reporting_opts, req_opcode, sdeb_i, supp;
u16 req_sa, u;
u32 alloc_len, a_len;
int k, offset, len, errsts, count, bump, na;
const struct opcode_info_t *oip;
const struct opcode_info_t *r_oip;
u8 *arr;
u8 *cmd = scp->cmnd;
rctd = !!(cmd[2] & 0x80);
reporting_opts = cmd[2] & 0x7;
req_opcode = cmd[3];
req_sa = get_unaligned_be16(cmd + 4);
alloc_len = get_unaligned_be32(cmd + 6);
if (alloc_len < 4 || alloc_len > 0xffff) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
return check_condition_result;
}
if (alloc_len > 8192)
a_len = 8192;
else
a_len = alloc_len;
arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
if (NULL == arr) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
INSUFF_RES_ASCQ);
return check_condition_result;
}
switch (reporting_opts) {
case 0: /* all commands */
/* count number of commands */
for (count = 0, oip = opcode_info_arr;
oip->num_attached != 0xff; ++oip) {
if (F_INV_OP & oip->flags)
continue;
count += (oip->num_attached + 1);
}
bump = rctd ? 20 : 8;
put_unaligned_be32(count * bump, arr);
for (offset = 4, oip = opcode_info_arr;
oip->num_attached != 0xff && offset < a_len; ++oip) {
if (F_INV_OP & oip->flags)
continue;
na = oip->num_attached;
arr[offset] = oip->opcode;
put_unaligned_be16(oip->sa, arr + offset + 2);
if (rctd)
arr[offset + 5] |= 0x2;
if (FF_SA & oip->flags)
arr[offset + 5] |= 0x1;
put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
if (rctd)
put_unaligned_be16(0xa, arr + offset + 8);
r_oip = oip;
for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
if (F_INV_OP & oip->flags)
continue;
offset += bump;
arr[offset] = oip->opcode;
put_unaligned_be16(oip->sa, arr + offset + 2);
if (rctd)
arr[offset + 5] |= 0x2;
if (FF_SA & oip->flags)
arr[offset + 5] |= 0x1;
put_unaligned_be16(oip->len_mask[0],
arr + offset + 6);
if (rctd)
put_unaligned_be16(0xa,
arr + offset + 8);
}
oip = r_oip;
offset += bump;
}
break;
case 1: /* one command: opcode only */
case 2: /* one command: opcode plus service action */
case 3: /* one command: if sa==0 then opcode only else opcode+sa */
sdeb_i = opcode_ind_arr[req_opcode];
oip = &opcode_info_arr[sdeb_i];
if (F_INV_OP & oip->flags) {
supp = 1;
offset = 4;
} else {
if (1 == reporting_opts) {
if (FF_SA & oip->flags) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB,
2, 2);
kfree(arr);
return check_condition_result;
}
req_sa = 0;
} else if (2 == reporting_opts &&
0 == (FF_SA & oip->flags)) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
kfree(arr); /* point at requested sa */
return check_condition_result;
}
if (0 == (FF_SA & oip->flags) &&
req_opcode == oip->opcode)
supp = 3;
else if (0 == (FF_SA & oip->flags)) {
na = oip->num_attached;
for (k = 0, oip = oip->arrp; k < na;
++k, ++oip) {
if (req_opcode == oip->opcode)
break;
}
supp = (k >= na) ? 1 : 3;
} else if (req_sa != oip->sa) {
na = oip->num_attached;
for (k = 0, oip = oip->arrp; k < na;
++k, ++oip) {
if (req_sa == oip->sa)
break;
}
supp = (k >= na) ? 1 : 3;
} else
supp = 3;
if (3 == supp) {
u = oip->len_mask[0];
put_unaligned_be16(u, arr + 2);
arr[4] = oip->opcode;
for (k = 1; k < u; ++k)
arr[4 + k] = (k < 16) ?
oip->len_mask[k] : 0xff;
offset = 4 + u;
} else
offset = 4;
}
arr[1] = (rctd ? 0x80 : 0) | supp;
if (rctd) {
put_unaligned_be16(0xa, arr + offset);
offset += 12;
}
break;
default:
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
kfree(arr);
return check_condition_result;
}
offset = (offset < a_len) ? offset : a_len;
len = (offset < alloc_len) ? offset : alloc_len;
errsts = fill_from_dev_buffer(scp, arr, len);
kfree(arr);
return errsts;
}
static int resp_rsup_tmfs(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
bool repd;
u32 alloc_len, len;
u8 arr[16];
u8 *cmd = scp->cmnd;
memset(arr, 0, sizeof(arr));
repd = !!(cmd[2] & 0x80);
alloc_len = get_unaligned_be32(cmd + 6);
if (alloc_len < 4) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
return check_condition_result;
}
arr[0] = 0xc8; /* ATS | ATSS | LURS */
arr[1] = 0x1; /* ITNRS */
if (repd) {
arr[3] = 0xc;
len = 16;
} else
len = 4;
len = (len < alloc_len) ? len : alloc_len;
return fill_from_dev_buffer(scp, arr, len);
}
/* <<Following mode page info copied from ST318451LW>> */
static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target)
{ /* Read-Write Error Recovery page for mode_sense */
unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
5, 0, 0xff, 0xff};
memcpy(p, err_recov_pg, sizeof(err_recov_pg));
if (1 == pcontrol)
memset(p + 2, 0, sizeof(err_recov_pg) - 2);
return sizeof(err_recov_pg);
}
static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target)
{ /* Disconnect-Reconnect page for mode_sense */
unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0};
memcpy(p, disconnect_pg, sizeof(disconnect_pg));
if (1 == pcontrol)
memset(p + 2, 0, sizeof(disconnect_pg) - 2);
return sizeof(disconnect_pg);
}
static int resp_format_pg(unsigned char *p, int pcontrol, int target)
{ /* Format device page for mode_sense */
unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0x40, 0, 0, 0};
memcpy(p, format_pg, sizeof(format_pg));
put_unaligned_be16(sdebug_sectors_per, p + 10);
put_unaligned_be16(sdebug_sector_size, p + 12);
if (sdebug_removable)
p[20] |= 0x20; /* should agree with INQUIRY */
if (1 == pcontrol)
memset(p + 2, 0, sizeof(format_pg) - 2);
return sizeof(format_pg);
}
static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
0, 0, 0, 0};
static int resp_caching_pg(unsigned char *p, int pcontrol, int target)
{ /* Caching page for mode_sense */
unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
if (SDEBUG_OPT_N_WCE & sdebug_opts)
caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
memcpy(p, caching_pg, sizeof(caching_pg));
if (1 == pcontrol)
memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
else if (2 == pcontrol)
memcpy(p, d_caching_pg, sizeof(d_caching_pg));
return sizeof(caching_pg);
}
static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
0, 0, 0x2, 0x4b};
static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target)
{ /* Control mode page for mode_sense */
unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
0, 0, 0, 0};
unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
0, 0, 0x2, 0x4b};
if (sdebug_dsense)
ctrl_m_pg[2] |= 0x4;
else
ctrl_m_pg[2] &= ~0x4;
if (sdebug_ato)
ctrl_m_pg[5] |= 0x80; /* ATO=1 */
memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
if (1 == pcontrol)
memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
else if (2 == pcontrol)
memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
return sizeof(ctrl_m_pg);
}
/* IO Advice Hints Grouping mode page */
static int resp_grouping_m_pg(unsigned char *p, int pcontrol, int target)
{
/* IO Advice Hints Grouping mode page */
struct grouping_m_pg {
u8 page_code; /* OR 0x40 when subpage_code > 0 */
u8 subpage_code;
__be16 page_length;
u8 reserved[12];
struct scsi_io_group_descriptor descr[MAXIMUM_NUMBER_OF_STREAMS];
};
static const struct grouping_m_pg gr_m_pg = {
.page_code = 0xa | 0x40,
.subpage_code = 5,
.page_length = cpu_to_be16(sizeof(gr_m_pg) - 4),
.descr = {
{ .st_enble = 1 },
{ .st_enble = 1 },
{ .st_enble = 1 },
{ .st_enble = 1 },
{ .st_enble = 1 },
{ .st_enble = 0 },
}
};
BUILD_BUG_ON(sizeof(struct grouping_m_pg) !=
16 + MAXIMUM_NUMBER_OF_STREAMS * 16);
memcpy(p, &gr_m_pg, sizeof(gr_m_pg));
if (1 == pcontrol) {
/* There are no changeable values so clear from byte 4 on. */
memset(p + 4, 0, sizeof(gr_m_pg) - 4);
}
return sizeof(gr_m_pg);
}
static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target)
{ /* Informational Exceptions control mode page for mode_sense */
unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
0, 0, 0x0, 0x0};
unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
0, 0, 0x0, 0x0};
memcpy(p, iec_m_pg, sizeof(iec_m_pg));
if (1 == pcontrol)
memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
else if (2 == pcontrol)
memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
return sizeof(iec_m_pg);
}
static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target)
{ /* SAS SSP mode page - short format for mode_sense */
unsigned char sas_sf_m_pg[] = {0x19, 0x6,
0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
if (1 == pcontrol)
memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
return sizeof(sas_sf_m_pg);
}
static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target,
int target_dev_id)
{ /* SAS phy control and discover mode page for mode_sense */
unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
0x2, 0, 0, 0, 0, 0, 0, 0,
0x88, 0x99, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
0x3, 0, 0, 0, 0, 0, 0, 0,
0x88, 0x99, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
};
int port_a, port_b;
put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
port_a = target_dev_id + 1;
port_b = port_a + 1;
memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
put_unaligned_be32(port_a, p + 20);
put_unaligned_be32(port_b, p + 48 + 20);
if (1 == pcontrol)
memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
return sizeof(sas_pcd_m_pg);
}
static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol)
{ /* SAS SSP shared protocol specific port mode subpage */
unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
0, 0, 0, 0, 0, 0, 0, 0,
};
memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
if (1 == pcontrol)
memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
return sizeof(sas_sha_m_pg);
}
/* PAGE_SIZE is more than necessary but provides room for future expansion. */
#define SDEBUG_MAX_MSENSE_SZ PAGE_SIZE
static int resp_mode_sense(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
int pcontrol, pcode, subpcode, bd_len;
unsigned char dev_spec;
u32 alloc_len, offset, len;
int target_dev_id;
int target = scp->device->id;
unsigned char *ap;
unsigned char *arr __free(kfree);
unsigned char *cmd = scp->cmnd;
bool dbd, llbaa, msense_6, is_disk, is_zbc;
arr = kzalloc(SDEBUG_MAX_MSENSE_SZ, GFP_ATOMIC);
if (!arr)
return -ENOMEM;
dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
pcontrol = (cmd[2] & 0xc0) >> 6;
pcode = cmd[2] & 0x3f;
subpcode = cmd[3];
msense_6 = (MODE_SENSE == cmd[0]);
llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
is_disk = (sdebug_ptype == TYPE_DISK);
is_zbc = devip->zoned;
if ((is_disk || is_zbc) && !dbd)
bd_len = llbaa ? 16 : 8;
else
bd_len = 0;
alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
if (0x3 == pcontrol) { /* Saving values not supported */
mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
return check_condition_result;
}
target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
(devip->target * 1000) - 3;
/* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */
if (is_disk || is_zbc) {
dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
if (sdebug_wp)
dev_spec |= 0x80;
} else
dev_spec = 0x0;
if (msense_6) {
arr[2] = dev_spec;
arr[3] = bd_len;
offset = 4;
} else {
arr[3] = dev_spec;
if (16 == bd_len)
arr[4] = 0x1; /* set LONGLBA bit */
arr[7] = bd_len; /* assume 255 or less */
offset = 8;
}
ap = arr + offset;
if ((bd_len > 0) && (!sdebug_capacity))
sdebug_capacity = get_sdebug_capacity();
if (8 == bd_len) {
if (sdebug_capacity > 0xfffffffe)
put_unaligned_be32(0xffffffff, ap + 0);
else
put_unaligned_be32(sdebug_capacity, ap + 0);
put_unaligned_be16(sdebug_sector_size, ap + 6);
offset += bd_len;
ap = arr + offset;
} else if (16 == bd_len) {
put_unaligned_be64((u64)sdebug_capacity, ap + 0);
put_unaligned_be32(sdebug_sector_size, ap + 12);
offset += bd_len;
ap = arr + offset;
}
/*
* N.B. If len>0 before resp_*_pg() call, then form of that call should be:
* len += resp_*_pg(ap + len, pcontrol, target);
*/
switch (pcode) {
case 0x1: /* Read-Write error recovery page, direct access */
if (subpcode > 0x0 && subpcode < 0xff)
goto bad_subpcode;
len = resp_err_recov_pg(ap, pcontrol, target);
offset += len;
break;
case 0x2: /* Disconnect-Reconnect page, all devices */
if (subpcode > 0x0 && subpcode < 0xff)
goto bad_subpcode;
len = resp_disconnect_pg(ap, pcontrol, target);
offset += len;
break;
case 0x3: /* Format device page, direct access */
if (subpcode > 0x0 && subpcode < 0xff)
goto bad_subpcode;
if (is_disk) {
len = resp_format_pg(ap, pcontrol, target);
offset += len;
} else {
goto bad_pcode;
}
break;
case 0x8: /* Caching page, direct access */
if (subpcode > 0x0 && subpcode < 0xff)
goto bad_subpcode;
if (is_disk || is_zbc) {
len = resp_caching_pg(ap, pcontrol, target);
offset += len;
} else {
goto bad_pcode;
}
break;
case 0xa: /* Control Mode page, all devices */
switch (subpcode) {
case 0:
len = resp_ctrl_m_pg(ap, pcontrol, target);
break;
case 0x05:
len = resp_grouping_m_pg(ap, pcontrol, target);
break;
case 0xff:
len = resp_ctrl_m_pg(ap, pcontrol, target);
len += resp_grouping_m_pg(ap + len, pcontrol, target);
break;
default:
goto bad_subpcode;
}
offset += len;
break;
case 0x19: /* if spc==1 then sas phy, control+discover */
if (subpcode > 0x2 && subpcode < 0xff)
goto bad_subpcode;
len = 0;
if ((0x0 == subpcode) || (0xff == subpcode))
len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
if ((0x1 == subpcode) || (0xff == subpcode))
len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
target_dev_id);
if ((0x2 == subpcode) || (0xff == subpcode))
len += resp_sas_sha_m_spg(ap + len, pcontrol);
offset += len;
break;
case 0x1c: /* Informational Exceptions Mode page, all devices */
if (subpcode > 0x0 && subpcode < 0xff)
goto bad_subpcode;
len = resp_iec_m_pg(ap, pcontrol, target);
offset += len;
break;
case 0x3f: /* Read all Mode pages */
if (subpcode > 0x0 && subpcode < 0xff)
goto bad_subpcode;
len = resp_err_recov_pg(ap, pcontrol, target);
len += resp_disconnect_pg(ap + len, pcontrol, target);
if (is_disk) {
len += resp_format_pg(ap + len, pcontrol, target);
len += resp_caching_pg(ap + len, pcontrol, target);
} else if (is_zbc) {
len += resp_caching_pg(ap + len, pcontrol, target);
}
len += resp_ctrl_m_pg(ap + len, pcontrol, target);
if (0xff == subpcode)
len += resp_grouping_m_pg(ap + len, pcontrol, target);
len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
if (0xff == subpcode) {
len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
target_dev_id);
len += resp_sas_sha_m_spg(ap + len, pcontrol);
}
len += resp_iec_m_pg(ap + len, pcontrol, target);
offset += len;
break;
default:
goto bad_pcode;
}
if (msense_6)
arr[0] = offset - 1;
else
put_unaligned_be16((offset - 2), arr + 0);
return fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, offset));
bad_pcode:
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
return check_condition_result;
bad_subpcode:
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
return check_condition_result;
}
#define SDEBUG_MAX_MSELECT_SZ 512
static int resp_mode_select(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
int param_len, res, mpage;
unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
unsigned char *cmd = scp->cmnd;
int mselect6 = (MODE_SELECT == cmd[0]);
memset(arr, 0, sizeof(arr));
pf = cmd[1] & 0x10;
sp = cmd[1] & 0x1;
param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
return check_condition_result;
}
res = fetch_to_dev_buffer(scp, arr, param_len);
if (-1 == res)
return DID_ERROR << 16;
else if (sdebug_verbose && (res < param_len))
sdev_printk(KERN_INFO, scp->device,
"%s: cdb indicated=%d, IO sent=%d bytes\n",
__func__, param_len, res);
md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
off = bd_len + (mselect6 ? 4 : 8);
if (md_len > 2 || off >= res) {
mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
return check_condition_result;
}
mpage = arr[off] & 0x3f;
ps = !!(arr[off] & 0x80);
if (ps) {
mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
return check_condition_result;
}
spf = !!(arr[off] & 0x40);
pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
(arr[off + 1] + 2);
if ((pg_len + off) > param_len) {
mk_sense_buffer(scp, ILLEGAL_REQUEST,
PARAMETER_LIST_LENGTH_ERR, 0);
return check_condition_result;
}
switch (mpage) {
case 0x8: /* Caching Mode page */
if (caching_pg[1] == arr[off + 1]) {
memcpy(caching_pg + 2, arr + off + 2,
sizeof(caching_pg) - 2);
goto set_mode_changed_ua;
}
break;
case 0xa: /* Control Mode page */
if (ctrl_m_pg[1] == arr[off + 1]) {
memcpy(ctrl_m_pg + 2, arr + off + 2,
sizeof(ctrl_m_pg) - 2);
if (ctrl_m_pg[4] & 0x8)
sdebug_wp = true;
else
sdebug_wp = false;
sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
goto set_mode_changed_ua;
}
break;
case 0x1c: /* Informational Exceptions Mode page */
if (iec_m_pg[1] == arr[off + 1]) {
memcpy(iec_m_pg + 2, arr + off + 2,
sizeof(iec_m_pg) - 2);
goto set_mode_changed_ua;
}
break;
default:
break;
}
mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
return check_condition_result;
set_mode_changed_ua:
set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
return 0;
}
static int resp_temp_l_pg(unsigned char *arr)
{
unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
0x0, 0x1, 0x3, 0x2, 0x0, 65,
};
memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
return sizeof(temp_l_pg);
}
static int resp_ie_l_pg(unsigned char *arr)
{
unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
};
memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
if (iec_m_pg[2] & 0x4) { /* TEST bit set */
arr[4] = THRESHOLD_EXCEEDED;
arr[5] = 0xff;
}
return sizeof(ie_l_pg);
}
static int resp_env_rep_l_spg(unsigned char *arr)
{
unsigned char env_rep_l_spg[] = {0x0, 0x0, 0x23, 0x8,
0x0, 40, 72, 0xff, 45, 18, 0, 0,
0x1, 0x0, 0x23, 0x8,
0x0, 55, 72, 35, 55, 45, 0, 0,
};
memcpy(arr, env_rep_l_spg, sizeof(env_rep_l_spg));
return sizeof(env_rep_l_spg);
}
#define SDEBUG_MAX_LSENSE_SZ 512
static int resp_log_sense(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
int ppc, sp, pcode, subpcode;
u32 alloc_len, len, n;
unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
unsigned char *cmd = scp->cmnd;
memset(arr, 0, sizeof(arr));
ppc = cmd[1] & 0x2;
sp = cmd[1] & 0x1;
if (ppc || sp) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
return check_condition_result;
}
pcode = cmd[2] & 0x3f;
subpcode = cmd[3] & 0xff;
alloc_len = get_unaligned_be16(cmd + 7);
arr[0] = pcode;
if (0 == subpcode) {
switch (pcode) {
case 0x0: /* Supported log pages log page */
n = 4;
arr[n++] = 0x0; /* this page */
arr[n++] = 0xd; /* Temperature */
arr[n++] = 0x2f; /* Informational exceptions */
arr[3] = n - 4;
break;
case 0xd: /* Temperature log page */
arr[3] = resp_temp_l_pg(arr + 4);
break;
case 0x2f: /* Informational exceptions log page */
arr[3] = resp_ie_l_pg(arr + 4);
break;
default:
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
return check_condition_result;
}
} else if (0xff == subpcode) {
arr[0] |= 0x40;
arr[1] = subpcode;
switch (pcode) {
case 0x0: /* Supported log pages and subpages log page */
n = 4;
arr[n++] = 0x0;
arr[n++] = 0x0; /* 0,0 page */
arr[n++] = 0x0;
arr[n++] = 0xff; /* this page */
arr[n++] = 0xd;
arr[n++] = 0x0; /* Temperature */
arr[n++] = 0xd;
arr[n++] = 0x1; /* Environment reporting */
arr[n++] = 0xd;
arr[n++] = 0xff; /* all 0xd subpages */
arr[n++] = 0x2f;
arr[n++] = 0x0; /* Informational exceptions */
arr[n++] = 0x2f;
arr[n++] = 0xff; /* all 0x2f subpages */
arr[3] = n - 4;
break;
case 0xd: /* Temperature subpages */
n = 4;
arr[n++] = 0xd;
arr[n++] = 0x0; /* Temperature */
arr[n++] = 0xd;
arr[n++] = 0x1; /* Environment reporting */
arr[n++] = 0xd;
arr[n++] = 0xff; /* these subpages */
arr[3] = n - 4;
break;
case 0x2f: /* Informational exceptions subpages */
n = 4;
arr[n++] = 0x2f;
arr[n++] = 0x0; /* Informational exceptions */
arr[n++] = 0x2f;
arr[n++] = 0xff; /* these subpages */
arr[3] = n - 4;
break;
default:
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
return check_condition_result;
}
} else if (subpcode > 0) {
arr[0] |= 0x40;
arr[1] = subpcode;
if (pcode == 0xd && subpcode == 1)
arr[3] = resp_env_rep_l_spg(arr + 4);
else {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
return check_condition_result;
}
} else {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
return check_condition_result;
}
len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len);
return fill_from_dev_buffer(scp, arr,
min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ));
}
static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip)
{
return devip->nr_zones != 0;
}
static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip,
unsigned long long lba)
{
u32 zno = lba >> devip->zsize_shift;
struct sdeb_zone_state *zsp;
if (devip->zcap == devip->zsize || zno < devip->nr_conv_zones)
return &devip->zstate[zno];
/*
* If the zone capacity is less than the zone size, adjust for gap
* zones.
*/
zno = 2 * zno - devip->nr_conv_zones;
WARN_ONCE(zno >= devip->nr_zones, "%u > %u\n", zno, devip->nr_zones);
zsp = &devip->zstate[zno];
if (lba >= zsp->z_start + zsp->z_size)
zsp++;
WARN_ON_ONCE(lba >= zsp->z_start + zsp->z_size);
return zsp;
}
static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp)
{
return zsp->z_type == ZBC_ZTYPE_CNV;
}
static inline bool zbc_zone_is_gap(struct sdeb_zone_state *zsp)
{
return zsp->z_type == ZBC_ZTYPE_GAP;
}
static inline bool zbc_zone_is_seq(struct sdeb_zone_state *zsp)
{
return !zbc_zone_is_conv(zsp) && !zbc_zone_is_gap(zsp);
}
static void zbc_close_zone(struct sdebug_dev_info *devip,
struct sdeb_zone_state *zsp)
{
enum sdebug_z_cond zc;
if (!zbc_zone_is_seq(zsp))
return;
zc = zsp->z_cond;
if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN))
return;
if (zc == ZC2_IMPLICIT_OPEN)
devip->nr_imp_open--;
else
devip->nr_exp_open--;
if (zsp->z_wp == zsp->z_start) {
zsp->z_cond = ZC1_EMPTY;
} else {
zsp->z_cond = ZC4_CLOSED;
devip->nr_closed++;
}
}
static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip)
{
struct sdeb_zone_state *zsp = &devip->zstate[0];
unsigned int i;
for (i = 0; i < devip->nr_zones; i++, zsp++) {
if (zsp->z_cond == ZC2_IMPLICIT_OPEN) {
zbc_close_zone(devip, zsp);
return;
}
}
}
static void zbc_open_zone(struct sdebug_dev_info *devip,
struct sdeb_zone_state *zsp, bool explicit)
{
enum sdebug_z_cond zc;
if (!zbc_zone_is_seq(zsp))
return;
zc = zsp->z_cond;
if ((explicit && zc == ZC3_EXPLICIT_OPEN) ||
(!explicit && zc == ZC2_IMPLICIT_OPEN))
return;
/* Close an implicit open zone if necessary */
if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN)
zbc_close_zone(devip, zsp);
else if (devip->max_open &&
devip->nr_imp_open + devip->nr_exp_open >= devip->max_open)
zbc_close_imp_open_zone(devip);
if (zsp->z_cond == ZC4_CLOSED)
devip->nr_closed--;
if (explicit) {
zsp->z_cond = ZC3_EXPLICIT_OPEN;
devip->nr_exp_open++;
} else {
zsp->z_cond = ZC2_IMPLICIT_OPEN;
devip->nr_imp_open++;
}
}
static inline void zbc_set_zone_full(struct sdebug_dev_info *devip,
struct sdeb_zone_state *zsp)
{
switch (zsp->z_cond) {
case ZC2_IMPLICIT_OPEN:
devip->nr_imp_open--;
break;
case ZC3_EXPLICIT_OPEN:
devip->nr_exp_open--;
break;
default:
WARN_ONCE(true, "Invalid zone %llu condition %x\n",
zsp->z_start, zsp->z_cond);
break;
}
zsp->z_cond = ZC5_FULL;
}
static void zbc_inc_wp(struct sdebug_dev_info *devip,
unsigned long long lba, unsigned int num)
{
struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
unsigned long long n, end, zend = zsp->z_start + zsp->z_size;
if (!zbc_zone_is_seq(zsp))
return;
if (zsp->z_type == ZBC_ZTYPE_SWR) {
zsp->z_wp += num;
if (zsp->z_wp >= zend)
zbc_set_zone_full(devip, zsp);
return;
}
while (num) {
if (lba != zsp->z_wp)
zsp->z_non_seq_resource = true;
end = lba + num;
if (end >= zend) {
n = zend - lba;
zsp->z_wp = zend;
} else if (end > zsp->z_wp) {
n = num;
zsp->z_wp = end;
} else {
n = num;
}
if (zsp->z_wp >= zend)
zbc_set_zone_full(devip, zsp);
num -= n;
lba += n;
if (num) {
zsp++;
zend = zsp->z_start + zsp->z_size;
}
}
}
static int check_zbc_access_params(struct scsi_cmnd *scp,
unsigned long long lba, unsigned int num, bool write)
{
struct scsi_device *sdp = scp->device;
struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1);
if (!write) {
/* For host-managed, reads cannot cross zone types boundaries */
if (zsp->z_type != zsp_end->z_type) {
mk_sense_buffer(scp, ILLEGAL_REQUEST,
LBA_OUT_OF_RANGE,
READ_INVDATA_ASCQ);
return check_condition_result;
}
return 0;
}
/* Writing into a gap zone is not allowed */
if (zbc_zone_is_gap(zsp)) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE,
ATTEMPT_ACCESS_GAP);
return check_condition_result;
}
/* No restrictions for writes within conventional zones */
if (zbc_zone_is_conv(zsp)) {
if (!zbc_zone_is_conv(zsp_end)) {
mk_sense_buffer(scp, ILLEGAL_REQUEST,
LBA_OUT_OF_RANGE,
WRITE_BOUNDARY_ASCQ);
return check_condition_result;
}
return 0;
}
if (zsp->z_type == ZBC_ZTYPE_SWR) {
/* Writes cannot cross sequential zone boundaries */
if (zsp_end != zsp) {
mk_sense_buffer(scp, ILLEGAL_REQUEST,
LBA_OUT_OF_RANGE,
WRITE_BOUNDARY_ASCQ);
return check_condition_result;
}
/* Cannot write full zones */
if (zsp->z_cond == ZC5_FULL) {
mk_sense_buffer(scp, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
return check_condition_result;
}
/* Writes must be aligned to the zone WP */
if (lba != zsp->z_wp) {
mk_sense_buffer(scp, ILLEGAL_REQUEST,
LBA_OUT_OF_RANGE,
UNALIGNED_WRITE_ASCQ);
return check_condition_result;
}
}
/* Handle implicit open of closed and empty zones */
if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) {
if (devip->max_open &&
devip->nr_exp_open >= devip->max_open) {
mk_sense_buffer(scp, DATA_PROTECT,
INSUFF_RES_ASC,
INSUFF_ZONE_ASCQ);
return check_condition_result;
}
zbc_open_zone(devip, zsp, false);
}
return 0;
}
static inline int check_device_access_params
(struct scsi_cmnd *scp, unsigned long long lba,
unsigned int num, bool write)
{
struct scsi_device *sdp = scp->device;
struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
if (lba + num > sdebug_capacity) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
return check_condition_result;
}
/* transfer length excessive (tie in to block limits VPD page) */
if (num > sdebug_store_sectors) {
/* needs work to find which cdb byte 'num' comes from */
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
return check_condition_result;
}
if (write && unlikely(sdebug_wp)) {
mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2);
return check_condition_result;
}
if (sdebug_dev_is_zoned(devip))
return check_zbc_access_params(scp, lba, num, write);
return 0;
}
/*
* Note: if BUG_ON() fires it usually indicates a problem with the parser
* tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions
* that access any of the "stores" in struct sdeb_store_info should call this
* function with bug_if_fake_rw set to true.
*/
static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip,
bool bug_if_fake_rw)
{
if (sdebug_fake_rw) {
BUG_ON(bug_if_fake_rw); /* See note above */
return NULL;
}
return xa_load(per_store_ap, devip->sdbg_host->si_idx);
}
static inline void
sdeb_read_lock(rwlock_t *lock)
{
if (sdebug_no_rwlock)
__acquire(lock);
else
read_lock(lock);
}
static inline void
sdeb_read_unlock(rwlock_t *lock)
{
if (sdebug_no_rwlock)
__release(lock);
else
read_unlock(lock);
}
static inline void
sdeb_write_lock(rwlock_t *lock)
{
if (sdebug_no_rwlock)
__acquire(lock);
else
write_lock(lock);
}
static inline void
sdeb_write_unlock(rwlock_t *lock)
{
if (sdebug_no_rwlock)
__release(lock);
else
write_unlock(lock);
}
static inline void
sdeb_data_read_lock(struct sdeb_store_info *sip)
{
BUG_ON(!sip);
sdeb_read_lock(&sip->macc_data_lck);
}
static inline void
sdeb_data_read_unlock(struct sdeb_store_info *sip)
{
BUG_ON(!sip);
sdeb_read_unlock(&sip->macc_data_lck);
}
static inline void
sdeb_data_write_lock(struct sdeb_store_info *sip)
{
BUG_ON(!sip);
sdeb_write_lock(&sip->macc_data_lck);
}
static inline void
sdeb_data_write_unlock(struct sdeb_store_info *sip)
{
BUG_ON(!sip);
sdeb_write_unlock(&sip->macc_data_lck);
}
static inline void
sdeb_data_sector_read_lock(struct sdeb_store_info *sip)
{
BUG_ON(!sip);
sdeb_read_lock(&sip->macc_sector_lck);
}
static inline void
sdeb_data_sector_read_unlock(struct sdeb_store_info *sip)
{
BUG_ON(!sip);
sdeb_read_unlock(&sip->macc_sector_lck);
}
static inline void
sdeb_data_sector_write_lock(struct sdeb_store_info *sip)
{
BUG_ON(!sip);
sdeb_write_lock(&sip->macc_sector_lck);
}
static inline void
sdeb_data_sector_write_unlock(struct sdeb_store_info *sip)
{
BUG_ON(!sip);
sdeb_write_unlock(&sip->macc_sector_lck);
}
/*
* Atomic locking:
* We simplify the atomic model to allow only 1x atomic write and many non-
* atomic reads or writes for all LBAs.
* A RW lock has a similar bahaviour:
* Only 1x writer and many readers.
* So use a RW lock for per-device read and write locking:
* An atomic access grabs the lock as a writer and non-atomic grabs the lock
* as a reader.
*/
static inline void
sdeb_data_lock(struct sdeb_store_info *sip, bool atomic)
{
if (atomic)
sdeb_data_write_lock(sip);
else
sdeb_data_read_lock(sip);
}
static inline void
sdeb_data_unlock(struct sdeb_store_info *sip, bool atomic)
{
if (atomic)
sdeb_data_write_unlock(sip);
else
sdeb_data_read_unlock(sip);
}
/* Allow many reads but only 1x write per sector */
static inline void
sdeb_data_sector_lock(struct sdeb_store_info *sip, bool do_write)
{
if (do_write)
sdeb_data_sector_write_lock(sip);
else
sdeb_data_sector_read_lock(sip);
}
static inline void
sdeb_data_sector_unlock(struct sdeb_store_info *sip, bool do_write)
{
if (do_write)
sdeb_data_sector_write_unlock(sip);
else
sdeb_data_sector_read_unlock(sip);
}
static inline void
sdeb_meta_read_lock(struct sdeb_store_info *sip)
{
if (sdebug_no_rwlock) {
if (sip)
__acquire(&sip->macc_meta_lck);
else
__acquire(&sdeb_fake_rw_lck);
} else {
if (sip)
read_lock(&sip->macc_meta_lck);
else
read_lock(&sdeb_fake_rw_lck);
}
}
static inline void
sdeb_meta_read_unlock(struct sdeb_store_info *sip)
{
if (sdebug_no_rwlock) {
if (sip)
__release(&sip->macc_meta_lck);
else
__release(&sdeb_fake_rw_lck);
} else {
if (sip)
read_unlock(&sip->macc_meta_lck);
else
read_unlock(&sdeb_fake_rw_lck);
}
}
static inline void
sdeb_meta_write_lock(struct sdeb_store_info *sip)
{
if (sdebug_no_rwlock) {
if (sip)
__acquire(&sip->macc_meta_lck);
else
__acquire(&sdeb_fake_rw_lck);
} else {
if (sip)
write_lock(&sip->macc_meta_lck);
else
write_lock(&sdeb_fake_rw_lck);
}
}
static inline void
sdeb_meta_write_unlock(struct sdeb_store_info *sip)
{
if (sdebug_no_rwlock) {
if (sip)
__release(&sip->macc_meta_lck);
else
__release(&sdeb_fake_rw_lck);
} else {
if (sip)
write_unlock(&sip->macc_meta_lck);
else
write_unlock(&sdeb_fake_rw_lck);
}
}
/* Returns number of bytes copied or -1 if error. */
static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp,
u32 sg_skip, u64 lba, u32 num, u8 group_number,
bool do_write, bool atomic)
{
int ret;
u64 block;
enum dma_data_direction dir;
struct scsi_data_buffer *sdb = &scp->sdb;
u8 *fsp;
int i;
/*
* Even though reads are inherently atomic (in this driver), we expect
* the atomic flag only for writes.
*/
if (!do_write && atomic)
return -1;
if (do_write) {
dir = DMA_TO_DEVICE;
write_since_sync = true;
} else {
dir = DMA_FROM_DEVICE;
}
if (!sdb->length || !sip)
return 0;
if (scp->sc_data_direction != dir)
return -1;
if (do_write && group_number < ARRAY_SIZE(writes_by_group_number))
atomic_long_inc(&writes_by_group_number[group_number]);
fsp = sip->storep;
block = do_div(lba, sdebug_store_sectors);
/* Only allow 1x atomic write or multiple non-atomic writes at any given time */
sdeb_data_lock(sip, atomic);
for (i = 0; i < num; i++) {
/* We shouldn't need to lock for atomic writes, but do it anyway */
sdeb_data_sector_lock(sip, do_write);
ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
fsp + (block * sdebug_sector_size),
sdebug_sector_size, sg_skip, do_write);
sdeb_data_sector_unlock(sip, do_write);
if (ret != sdebug_sector_size) {
ret += (i * sdebug_sector_size);
break;
}
sg_skip += sdebug_sector_size;
if (++block >= sdebug_store_sectors)
block = 0;
}
ret = num * sdebug_sector_size;
sdeb_data_unlock(sip, atomic);
return ret;
}
/* Returns number of bytes copied or -1 if error. */
static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp)
{
struct scsi_data_buffer *sdb = &scp->sdb;
if (!sdb->length)
return 0;
if (scp->sc_data_direction != DMA_TO_DEVICE)
return -1;
return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp,
num * sdebug_sector_size, 0, true);
}
/* If sip->storep+lba compares equal to arr(num), then copy top half of
* arr into sip->storep+lba and return true. If comparison fails then
* return false. */
static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num,
const u8 *arr, bool compare_only)
{
bool res;
u64 block, rest = 0;
u32 store_blks = sdebug_store_sectors;
u32 lb_size = sdebug_sector_size;
u8 *fsp = sip->storep;
block = do_div(lba, store_blks);
if (block + num > store_blks)
rest = block + num - store_blks;
res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size);
if (!res)
return res;
if (rest)
res = memcmp(fsp, arr + ((num - rest) * lb_size),
rest * lb_size);
if (!res)
return res;
if (compare_only)
return true;
arr += num * lb_size;
memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size);
if (rest)
memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size);
return res;
}
static __be16 dif_compute_csum(const void *buf, int len)
{
__be16 csum;
if (sdebug_guard)
csum = (__force __be16)ip_compute_csum(buf, len);
else
csum = cpu_to_be16(crc_t10dif(buf, len));
return csum;
}
static int dif_verify(struct t10_pi_tuple *sdt, const void *data,
sector_t sector, u32 ei_lba)
{
__be16 csum = dif_compute_csum(data, sdebug_sector_size);
if (sdt->guard_tag != csum) {
pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
(unsigned long)sector,
be16_to_cpu(sdt->guard_tag),
be16_to_cpu(csum));
return 0x01;
}
if (sdebug_dif == T10_PI_TYPE1_PROTECTION &&
be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
pr_err("REF check failed on sector %lu\n",
(unsigned long)sector);
return 0x03;
}
if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
be32_to_cpu(sdt->ref_tag) != ei_lba) {
pr_err("REF check failed on sector %lu\n",
(unsigned long)sector);
return 0x03;
}
return 0;
}
static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector,
unsigned int sectors, bool read)
{
size_t resid;
void *paddr;
struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
scp->device->hostdata, true);
struct t10_pi_tuple *dif_storep = sip->dif_storep;
const void *dif_store_end = dif_storep + sdebug_store_sectors;
struct sg_mapping_iter miter;
/* Bytes of protection data to copy into sgl */
resid = sectors * sizeof(*dif_storep);
sg_miter_start(&miter, scsi_prot_sglist(scp),
scsi_prot_sg_count(scp), SG_MITER_ATOMIC |
(read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
while (sg_miter_next(&miter) && resid > 0) {
size_t len = min_t(size_t, miter.length, resid);
void *start = dif_store(sip, sector);
size_t rest = 0;
if (dif_store_end < start + len)
rest = start + len - dif_store_end;
paddr = miter.addr;
if (read)
memcpy(paddr, start, len - rest);
else
memcpy(start, paddr, len - rest);
if (rest) {
if (read)
memcpy(paddr + len - rest, dif_storep, rest);
else
memcpy(dif_storep, paddr + len - rest, rest);
}
sector += len / sizeof(*dif_storep);
resid -= len;
}
sg_miter_stop(&miter);
}
static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec,
unsigned int sectors, u32 ei_lba)
{
int ret = 0;
unsigned int i;
sector_t sector;
struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
scp->device->hostdata, true);
struct t10_pi_tuple *sdt;
for (i = 0; i < sectors; i++, ei_lba++) {
sector = start_sec + i;
sdt = dif_store(sip, sector);
if (sdt->app_tag == cpu_to_be16(0xffff))
continue;
/*
* Because scsi_debug acts as both initiator and
* target we proceed to verify the PI even if
* RDPROTECT=3. This is done so the "initiator" knows
* which type of error to return. Otherwise we would
* have to iterate over the PI twice.
*/
if (scp->cmnd[1] >> 5) { /* RDPROTECT */
ret = dif_verify(sdt, lba2fake_store(sip, sector),
sector, ei_lba);
if (ret) {
dif_errors++;
break;
}
}
}
dif_copy_prot(scp, start_sec, sectors, true);
dix_reads++;
return ret;
}
static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
{
bool check_prot;
u32 num;
u32 ei_lba;
int ret;
u64 lba;
struct sdeb_store_info *sip = devip2sip(devip, true);
u8 *cmd = scp->cmnd;
bool meta_data_locked = false;
switch (cmd[0]) {
case READ_16:
ei_lba = 0;
lba = get_unaligned_be64(cmd + 2);
num = get_unaligned_be32(cmd + 10);
check_prot = true;
break;
case READ_10:
ei_lba = 0;
lba = get_unaligned_be32(cmd + 2);
num = get_unaligned_be16(cmd + 7);
check_prot = true;
break;
case READ_6:
ei_lba = 0;
lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
(u32)(cmd[1] & 0x1f) << 16;
num = (0 == cmd[4]) ? 256 : cmd[4];
check_prot = true;
break;
case READ_12:
ei_lba = 0;
lba = get_unaligned_be32(cmd + 2);
num = get_unaligned_be32(cmd + 6);
check_prot = true;
break;
case XDWRITEREAD_10:
ei_lba = 0;
lba = get_unaligned_be32(cmd + 2);
num = get_unaligned_be16(cmd + 7);
check_prot = false;
break;
default: /* assume READ(32) */
lba = get_unaligned_be64(cmd + 12);
ei_lba = get_unaligned_be32(cmd + 20);
num = get_unaligned_be32(cmd + 28);
check_prot = false;
break;
}
if (unlikely(have_dif_prot && check_prot)) {
if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
(cmd[1] & 0xe0)) {
mk_sense_invalid_opcode(scp);
return check_condition_result;
}
if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
(cmd[1] & 0xe0) == 0)
sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
"to DIF device\n");
}
if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) &&
atomic_read(&sdeb_inject_pending))) {
num /= 2;
atomic_set(&sdeb_inject_pending, 0);
}
/*
* When checking device access params, for reads we only check data
* versus what is set at init time, so no need to lock.
*/
ret = check_device_access_params(scp, lba, num, false);
if (ret)
return ret;
if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
(lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) &&
((lba + num) > sdebug_medium_error_start))) {
/* claim unrecoverable read error */
mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
/* set info field and valid bit for fixed descriptor */
if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
scp->sense_buffer[0] |= 0x80; /* Valid bit */
ret = (lba < OPT_MEDIUM_ERR_ADDR)
? OPT_MEDIUM_ERR_ADDR : (int)lba;
put_unaligned_be32(ret, scp->sense_buffer + 3);
}
scsi_set_resid(scp, scsi_bufflen(scp));
return check_condition_result;
}
if (sdebug_dev_is_zoned(devip) ||
(sdebug_dix && scsi_prot_sg_count(scp))) {
sdeb_meta_read_lock(sip);
meta_data_locked = true;
}
/* DIX + T10 DIF */
if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
switch (prot_verify_read(scp, lba, num, ei_lba)) {
case 1: /* Guard tag error */
if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
sdeb_meta_read_unlock(sip);
mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
return check_condition_result;
} else if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) {
sdeb_meta_read_unlock(sip);
mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
return illegal_condition_result;
}
break;
case 3: /* Reference tag error */
if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
sdeb_meta_read_unlock(sip);
mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3);
return check_condition_result;
} else if (scp->prot_flags & SCSI_PROT_REF_CHECK) {
sdeb_meta_read_unlock(sip);
mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3);
return illegal_condition_result;
}
break;
}
}
ret = do_device_access(sip, scp, 0, lba, num, 0, false, false);
if (meta_data_locked)
sdeb_meta_read_unlock(sip);
if (unlikely(ret == -1))
return DID_ERROR << 16;
scsi_set_resid(scp, scsi_bufflen(scp) - ret);
if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
atomic_read(&sdeb_inject_pending))) {
if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
atomic_set(&sdeb_inject_pending, 0);
return check_condition_result;
} else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
/* Logical block guard check failed */
mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
atomic_set(&sdeb_inject_pending, 0);
return illegal_condition_result;
} else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
atomic_set(&sdeb_inject_pending, 0);
return illegal_condition_result;
}
}
return 0;
}
static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
unsigned int sectors, u32 ei_lba)
{
int ret;
struct t10_pi_tuple *sdt;
void *daddr;
sector_t sector = start_sec;
int ppage_offset;
int dpage_offset;
struct sg_mapping_iter diter;
struct sg_mapping_iter piter;
BUG_ON(scsi_sg_count(SCpnt) == 0);
BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
scsi_prot_sg_count(SCpnt),
SG_MITER_ATOMIC | SG_MITER_FROM_SG);
sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
SG_MITER_ATOMIC | SG_MITER_FROM_SG);
/* For each protection page */
while (sg_miter_next(&piter)) {
dpage_offset = 0;
if (WARN_ON(!sg_miter_next(&diter))) {
ret = 0x01;
goto out;
}
for (ppage_offset = 0; ppage_offset < piter.length;
ppage_offset += sizeof(struct t10_pi_tuple)) {
/* If we're at the end of the current
* data page advance to the next one
*/
if (dpage_offset >= diter.length) {
if (WARN_ON(!sg_miter_next(&diter))) {
ret = 0x01;
goto out;
}
dpage_offset = 0;
}
sdt = piter.addr + ppage_offset;
daddr = diter.addr + dpage_offset;
if (SCpnt->cmnd[1] >> 5 != 3) { /* WRPROTECT */
ret = dif_verify(sdt, daddr, sector, ei_lba);
if (ret)
goto out;
}
sector++;
ei_lba++;
dpage_offset += sdebug_sector_size;
}
diter.consumed = dpage_offset;
sg_miter_stop(&diter);
}
sg_miter_stop(&piter);
dif_copy_prot(SCpnt, start_sec, sectors, false);
dix_writes++;
return 0;
out:
dif_errors++;
sg_miter_stop(&diter);
sg_miter_stop(&piter);
return ret;
}
static unsigned long lba_to_map_index(sector_t lba)
{
if (sdebug_unmap_alignment)
lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
sector_div(lba, sdebug_unmap_granularity);
return lba;
}
static sector_t map_index_to_lba(unsigned long index)
{
sector_t lba = index * sdebug_unmap_granularity;
if (sdebug_unmap_alignment)
lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
return lba;
}
static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba,
unsigned int *num)
{
sector_t end;
unsigned int mapped;
unsigned long index;
unsigned long next;
index = lba_to_map_index(lba);
mapped = test_bit(index, sip->map_storep);
if (mapped)
next = find_next_zero_bit(sip->map_storep, map_size, index);
else
next = find_next_bit(sip->map_storep, map_size, index);
end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
*num = end - lba;
return mapped;
}
static void map_region(struct sdeb_store_info *sip, sector_t lba,
unsigned int len)
{
sector_t end = lba + len;
while (lba < end) {
unsigned long index = lba_to_map_index(lba);
if (index < map_size)
set_bit(index, sip->map_storep);
lba = map_index_to_lba(index + 1);
}
}
static void unmap_region(struct sdeb_store_info *sip, sector_t lba,
unsigned int len)
{
sector_t end = lba + len;
u8 *fsp = sip->storep;
while (lba < end) {
unsigned long index = lba_to_map_index(lba);
if (lba == map_index_to_lba(index) &&
lba + sdebug_unmap_granularity <= end &&
index < map_size) {
clear_bit(index, sip->map_storep);
if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
memset(fsp + lba * sdebug_sector_size,
(sdebug_lbprz & 1) ? 0 : 0xff,
sdebug_sector_size *
sdebug_unmap_granularity);
}
if (sip->dif_storep) {
memset(sip->dif_storep + lba, 0xff,
sizeof(*sip->dif_storep) *
sdebug_unmap_granularity);
}
}
lba = map_index_to_lba(index + 1);
}
}
static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
{
bool check_prot;
u32 num;
u8 group = 0;
u32 ei_lba;
int ret;
u64 lba;
struct sdeb_store_info *sip = devip2sip(devip, true);
u8 *cmd = scp->cmnd;
bool meta_data_locked = false;
switch (cmd[0]) {
case WRITE_16:
ei_lba = 0;
lba = get_unaligned_be64(cmd + 2);
num = get_unaligned_be32(cmd + 10);
group = cmd[14] & 0x3f;
check_prot = true;
break;
case WRITE_10:
ei_lba = 0;
lba = get_unaligned_be32(cmd + 2);
group = cmd[6] & 0x3f;
num = get_unaligned_be16(cmd + 7);
check_prot = true;
break;
case WRITE_6:
ei_lba = 0;
lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
(u32)(cmd[1] & 0x1f) << 16;
num = (0 == cmd[4]) ? 256 : cmd[4];
check_prot = true;
break;
case WRITE_12:
ei_lba = 0;
lba = get_unaligned_be32(cmd + 2);
num = get_unaligned_be32(cmd + 6);
group = cmd[6] & 0x3f;
check_prot = true;
break;
case 0x53: /* XDWRITEREAD(10) */
ei_lba = 0;
lba = get_unaligned_be32(cmd + 2);
group = cmd[6] & 0x1f;
num = get_unaligned_be16(cmd + 7);
check_prot = false;
break;
default: /* assume WRITE(32) */
group = cmd[6] & 0x3f;
lba = get_unaligned_be64(cmd + 12);
ei_lba = get_unaligned_be32(cmd + 20);
num = get_unaligned_be32(cmd + 28);
check_prot = false;
break;
}
if (unlikely(have_dif_prot && check_prot)) {
if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
(cmd[1] & 0xe0)) {
mk_sense_invalid_opcode(scp);
return check_condition_result;
}
if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
(cmd[1] & 0xe0) == 0)
sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
"to DIF device\n");
}
if (sdebug_dev_is_zoned(devip) ||
(sdebug_dix && scsi_prot_sg_count(scp)) ||
scsi_debug_lbp()) {
sdeb_meta_write_lock(sip);
meta_data_locked = true;
}
ret = check_device_access_params(scp, lba, num, true);
if (ret) {
if (meta_data_locked)
sdeb_meta_write_unlock(sip);
return ret;
}
/* DIX + T10 DIF */
if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
switch (prot_verify_write(scp, lba, num, ei_lba)) {
case 1: /* Guard tag error */
if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) {
sdeb_meta_write_unlock(sip);
mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
return illegal_condition_result;
} else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */
sdeb_meta_write_unlock(sip);
mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
return check_condition_result;
}
break;
case 3: /* Reference tag error */
if (scp->prot_flags & SCSI_PROT_REF_CHECK) {
sdeb_meta_write_unlock(sip);
mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3);
return illegal_condition_result;
} else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */
sdeb_meta_write_unlock(sip);
mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3);
return check_condition_result;
}
break;
}
}
ret = do_device_access(sip, scp, 0, lba, num, group, true, false);
if (unlikely(scsi_debug_lbp()))
map_region(sip, lba, num);
/* If ZBC zone then bump its write pointer */
if (sdebug_dev_is_zoned(devip))
zbc_inc_wp(devip, lba, num);
if (meta_data_locked)
sdeb_meta_write_unlock(sip);
if (unlikely(-1 == ret))
return DID_ERROR << 16;
else if (unlikely(sdebug_verbose &&
(ret < (num * sdebug_sector_size))))
sdev_printk(KERN_INFO, scp->device,
"%s: write: cdb indicated=%u, IO sent=%d bytes\n",
my_name, num * sdebug_sector_size, ret);
if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
atomic_read(&sdeb_inject_pending))) {
if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
atomic_set(&sdeb_inject_pending, 0);
return check_condition_result;
} else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
/* Logical block guard check failed */
mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
atomic_set(&sdeb_inject_pending, 0);
return illegal_condition_result;
} else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
atomic_set(&sdeb_inject_pending, 0);
return illegal_condition_result;
}
}
return 0;
}
/*
* T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32).
* No READ GATHERED yet (requires bidi or long cdb holding gather list).
*/
static int resp_write_scat(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
u8 *cmd = scp->cmnd;
u8 *lrdp = NULL;
u8 *up;
struct sdeb_store_info *sip = devip2sip(devip, true);
u8 wrprotect;
u16 lbdof, num_lrd, k;
u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb;
u32 lb_size = sdebug_sector_size;
u32 ei_lba;
u64 lba;
u8 group;
int ret, res;
bool is_16;
static const u32 lrd_size = 32; /* + parameter list header size */
if (cmd[0] == VARIABLE_LENGTH_CMD) {
is_16 = false;
group = cmd[6] & 0x3f;
wrprotect = (cmd[10] >> 5) & 0x7;
lbdof = get_unaligned_be16(cmd + 12);
num_lrd = get_unaligned_be16(cmd + 16);
bt_len = get_unaligned_be32(cmd + 28);
} else { /* that leaves WRITE SCATTERED(16) */
is_16 = true;
wrprotect = (cmd[2] >> 5) & 0x7;
lbdof = get_unaligned_be16(cmd + 4);
num_lrd = get_unaligned_be16(cmd + 8);
bt_len = get_unaligned_be32(cmd + 10);
group = cmd[14] & 0x3f;
if (unlikely(have_dif_prot)) {
if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
wrprotect) {
mk_sense_invalid_opcode(scp);
return illegal_condition_result;
}
if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
wrprotect == 0)
sdev_printk(KERN_ERR, scp->device,
"Unprotected WR to DIF device\n");
}
}
if ((num_lrd == 0) || (bt_len == 0))
return 0; /* T10 says these do-nothings are not errors */
if (lbdof == 0) {
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device,
"%s: %s: LB Data Offset field bad\n",
my_name, __func__);
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
return illegal_condition_result;
}
lbdof_blen = lbdof * lb_size;
if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) {
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device,
"%s: %s: LBA range descriptors don't fit\n",
my_name, __func__);
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
return illegal_condition_result;
}
lrdp = kzalloc(lbdof_blen, GFP_ATOMIC | __GFP_NOWARN);
if (lrdp == NULL)
return SCSI_MLQUEUE_HOST_BUSY;
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device,
"%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n",
my_name, __func__, lbdof_blen);
res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen);
if (res == -1) {
ret = DID_ERROR << 16;
goto err_out;
}
/* Just keep it simple and always lock for now */
sdeb_meta_write_lock(sip);
sg_off = lbdof_blen;
/* Spec says Buffer xfer Length field in number of LBs in dout */
cum_lb = 0;
for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) {
lba = get_unaligned_be64(up + 0);
num = get_unaligned_be32(up + 8);
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device,
"%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n",
my_name, __func__, k, lba, num, sg_off);
if (num == 0)
continue;
ret = check_device_access_params(scp, lba, num, true);
if (ret)
goto err_out_unlock;
num_by = num * lb_size;
ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12);
if ((cum_lb + num) > bt_len) {
if (sdebug_verbose)
sdev_printk(KERN_INFO, scp->device,
"%s: %s: sum of blocks > data provided\n",
my_name, __func__);
mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC,
0);
ret = illegal_condition_result;
goto err_out_unlock;
}
/* DIX + T10 DIF */
if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
int prot_ret = prot_verify_write(scp, lba, num,
ei_lba);
if (prot_ret) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10,
prot_ret);
ret = illegal_condition_result;
goto err_out_unlock;
}
}
/*
* Write ranges atomically to keep as close to pre-atomic
* writes behaviour as possible.
*/
ret = do_device_access(sip, scp, sg_off, lba, num, group, true, true);
/* If ZBC zone then bump its write pointer */
if (sdebug_dev_is_zoned(devip))
zbc_inc_wp(devip, lba, num);
if (unlikely(scsi_debug_lbp()))
map_region(sip, lba, num);
if (unlikely(-1 == ret)) {
ret = DID_ERROR << 16;
goto err_out_unlock;
} else if (unlikely(sdebug_verbose && (ret < num_by)))
sdev_printk(KERN_INFO, scp->device,
"%s: write: cdb indicated=%u, IO sent=%d bytes\n",
my_name, num_by, ret);
if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
atomic_read(&sdeb_inject_pending))) {
if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
atomic_set(&sdeb_inject_pending, 0);
ret = check_condition_result;
goto err_out_unlock;
} else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
/* Logical block guard check failed */
mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
atomic_set(&sdeb_inject_pending, 0);
ret = illegal_condition_result;
goto err_out_unlock;
} else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
atomic_set(&sdeb_inject_pending, 0);
ret = illegal_condition_result;
goto err_out_unlock;
}
}
sg_off += num_by;
cum_lb += num;
}
ret = 0;
err_out_unlock:
sdeb_meta_write_unlock(sip);
err_out:
kfree(lrdp);
return ret;
}
static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
u32 ei_lba, bool unmap, bool ndob)
{
struct scsi_device *sdp = scp->device;
struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
unsigned long long i;
u64 block, lbaa;
u32 lb_size = sdebug_sector_size;
int ret;
struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
scp->device->hostdata, true);
u8 *fs1p;
u8 *fsp;
bool meta_data_locked = false;
if (sdebug_dev_is_zoned(devip) || scsi_debug_lbp()) {
sdeb_meta_write_lock(sip);
meta_data_locked = true;
}
ret = check_device_access_params(scp, lba, num, true);
if (ret)
goto out;
if (unmap && scsi_debug_lbp()) {
unmap_region(sip, lba, num);
goto out;
}
lbaa = lba;
block = do_div(lbaa, sdebug_store_sectors);
/* if ndob then zero 1 logical block, else fetch 1 logical block */
fsp = sip->storep;
fs1p = fsp + (block * lb_size);
sdeb_data_write_lock(sip);
if (ndob) {
memset(fs1p, 0, lb_size);
ret = 0;
} else
ret = fetch_to_dev_buffer(scp, fs1p, lb_size);
if (-1 == ret) {
ret = DID_ERROR << 16;
goto out;
} else if (sdebug_verbose && !ndob && (ret < lb_size))
sdev_printk(KERN_INFO, scp->device,
"%s: %s: lb size=%u, IO sent=%d bytes\n",
my_name, "write same", lb_size, ret);
/* Copy first sector to remaining blocks */
for (i = 1 ; i < num ; i++) {
lbaa = lba + i;
block = do_div(lbaa, sdebug_store_sectors);
memmove(fsp + (block * lb_size), fs1p, lb_size);
}
if (scsi_debug_lbp())
map_region(sip, lba, num);
/* If ZBC zone then bump its write pointer */
if (sdebug_dev_is_zoned(devip))
zbc_inc_wp(devip, lba, num);
sdeb_data_write_unlock(sip);
ret = 0;
out:
if (meta_data_locked)
sdeb_meta_write_unlock(sip);
return ret;
}
static int resp_write_same_10(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
u8 *cmd = scp->cmnd;
u32 lba;
u16 num;
u32 ei_lba = 0;
bool unmap = false;
if (cmd[1] & 0x8) {
if (sdebug_lbpws10 == 0) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
return check_condition_result;
} else
unmap = true;
}
lba = get_unaligned_be32(cmd + 2);
num = get_unaligned_be16(cmd + 7);
if (num > sdebug_write_same_length) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
return check_condition_result;
}
return resp_write_same(scp, lba, num, ei_lba, unmap, false);
}
static int resp_write_same_16(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
u8 *cmd = scp->cmnd;
u64 lba;
u32 num;
u32 ei_lba = 0;
bool unmap = false;
bool ndob = false;
if (cmd[1] & 0x8) { /* UNMAP */
if (sdebug_lbpws == 0) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
return check_condition_result;
} else
unmap = true;
}
if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
ndob = true;
lba = get_unaligned_be64(cmd + 2);
num = get_unaligned_be32(cmd + 10);
if (num > sdebug_write_same_length) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
return check_condition_result;
}
return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
}
/* Note the mode field is in the same position as the (lower) service action
* field. For the Report supported operation codes command, SPC-4 suggests
* each mode of this command should be reported separately; for future. */
static int resp_write_buffer(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
u8 *cmd = scp->cmnd;
struct scsi_device *sdp = scp->device;
struct sdebug_dev_info *dp;
u8 mode;
mode = cmd[1] & 0x1f;
switch (mode) {
case 0x4: /* download microcode (MC) and activate (ACT) */
/* set UAs on this device only */
set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
break;
case 0x5: /* download MC, save and ACT */
set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
break;
case 0x6: /* download MC with offsets and ACT */
/* set UAs on most devices (LUs) in this target */
list_for_each_entry(dp,
&devip->sdbg_host->dev_info_list,
dev_list)
if (dp->target == sdp->id) {
set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
if (devip != dp)
set_bit(SDEBUG_UA_MICROCODE_CHANGED,
dp->uas_bm);
}
break;
case 0x7: /* download MC with offsets, save, and ACT */
/* set UA on all devices (LUs) in this target */
list_for_each_entry(dp,
&devip->sdbg_host->dev_info_list,
dev_list)
if (dp->target == sdp->id)
set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
dp->uas_bm);
break;
default:
/* do nothing for this command for other mode values */
break;
}
return 0;
}
static int resp_comp_write(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
u8 *cmd = scp->cmnd;
u8 *arr;
struct sdeb_store_info *sip = devip2sip(devip, true);
u64 lba;
u32 dnum;
u32 lb_size = sdebug_sector_size;
u8 num;
int ret;
int retval = 0;
lba = get_unaligned_be64(cmd + 2);
num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
if (0 == num)
return 0; /* degenerate case, not an error */
if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
(cmd[1] & 0xe0)) {
mk_sense_invalid_opcode(scp);
return check_condition_result;
}
if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
(cmd[1] & 0xe0) == 0)
sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
"to DIF device\n");
ret = check_device_access_params(scp, lba, num, false);
if (ret)
return ret;
dnum = 2 * num;
arr = kcalloc(lb_size, dnum, GFP_ATOMIC);
if (NULL == arr) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
INSUFF_RES_ASCQ);
return check_condition_result;
}
ret = do_dout_fetch(scp, dnum, arr);
if (ret == -1) {
retval = DID_ERROR << 16;
goto cleanup_free;
} else if (sdebug_verbose && (ret < (dnum * lb_size)))
sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
"indicated=%u, IO sent=%d bytes\n", my_name,
dnum * lb_size, ret);
sdeb_data_write_lock(sip);
sdeb_meta_write_lock(sip);
if (!comp_write_worker(sip, lba, num, arr, false)) {
mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
retval = check_condition_result;
goto cleanup_unlock;
}
/* Cover sip->map_storep (which map_region()) sets with data lock */
if (scsi_debug_lbp())
map_region(sip, lba, num);
cleanup_unlock:
sdeb_meta_write_unlock(sip);
sdeb_data_write_unlock(sip);
cleanup_free:
kfree(arr);
return retval;
}
struct unmap_block_desc {
__be64 lba;
__be32 blocks;
__be32 __reserved;
};
static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
{
unsigned char *buf;
struct unmap_block_desc *desc;
struct sdeb_store_info *sip = devip2sip(devip, true);
unsigned int i, payload_len, descriptors;
int ret;
if (!scsi_debug_lbp())
return 0; /* fib and say its done */
payload_len = get_unaligned_be16(scp->cmnd + 7);
BUG_ON(scsi_bufflen(scp) != payload_len);
descriptors = (payload_len - 8) / 16;
if (descriptors > sdebug_unmap_max_desc) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
return check_condition_result;
}
buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
if (!buf) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
INSUFF_RES_ASCQ);
return check_condition_result;
}
scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
desc = (void *)&buf[8];
sdeb_meta_write_lock(sip);
for (i = 0 ; i < descriptors ; i++) {
unsigned long long lba = get_unaligned_be64(&desc[i].lba);
unsigned int num = get_unaligned_be32(&desc[i].blocks);
ret = check_device_access_params(scp, lba, num, true);
if (ret)
goto out;
unmap_region(sip, lba, num);
}
ret = 0;
out:
sdeb_meta_write_unlock(sip);
kfree(buf);
return ret;
}
#define SDEBUG_GET_LBA_STATUS_LEN 32
static int resp_get_lba_status(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
u8 *cmd = scp->cmnd;
u64 lba;
u32 alloc_len, mapped, num;
int ret;
u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
lba = get_unaligned_be64(cmd + 2);
alloc_len = get_unaligned_be32(cmd + 10);
if (alloc_len < 24)
return 0;
ret = check_device_access_params(scp, lba, 1, false);
if (ret)
return ret;
if (scsi_debug_lbp()) {
struct sdeb_store_info *sip = devip2sip(devip, true);
mapped = map_state(sip, lba, &num);
} else {
mapped = 1;
/* following just in case virtual_gb changed */
sdebug_capacity = get_sdebug_capacity();
if (sdebug_capacity - lba <= 0xffffffff)
num = sdebug_capacity - lba;
else
num = 0xffffffff;
}
memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
put_unaligned_be32(20, arr); /* Parameter Data Length */
put_unaligned_be64(lba, arr + 8); /* LBA */
put_unaligned_be32(num, arr + 16); /* Number of blocks */
arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
}
static int resp_get_stream_status(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
u16 starting_stream_id, stream_id;
const u8 *cmd = scp->cmnd;
u32 alloc_len, offset;
u8 arr[256] = {};
struct scsi_stream_status_header *h = (void *)arr;
starting_stream_id = get_unaligned_be16(cmd + 4);
alloc_len = get_unaligned_be32(cmd + 10);
if (alloc_len < 8) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
return check_condition_result;
}
if (starting_stream_id >= MAXIMUM_NUMBER_OF_STREAMS) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
return check_condition_result;
}
/*
* The GET STREAM STATUS command only reports status information
* about open streams. Treat the non-permanent stream as open.
*/
put_unaligned_be16(MAXIMUM_NUMBER_OF_STREAMS,
&h->number_of_open_streams);
for (offset = 8, stream_id = starting_stream_id;
offset + 8 <= min_t(u32, alloc_len, sizeof(arr)) &&
stream_id < MAXIMUM_NUMBER_OF_STREAMS;
offset += 8, stream_id++) {
struct scsi_stream_status *stream_status = (void *)arr + offset;
stream_status->perm = stream_id < PERMANENT_STREAM_COUNT;
put_unaligned_be16(stream_id,
&stream_status->stream_identifier);
stream_status->rel_lifetime = stream_id + 1;
}
put_unaligned_be32(offset - 8, &h->len); /* PARAMETER DATA LENGTH */
return fill_from_dev_buffer(scp, arr, min(offset, alloc_len));
}
static int resp_sync_cache(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
int res = 0;
u64 lba;
u32 num_blocks;
u8 *cmd = scp->cmnd;
if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */
lba = get_unaligned_be32(cmd + 2);
num_blocks = get_unaligned_be16(cmd + 7);
} else { /* SYNCHRONIZE_CACHE(16) */
lba = get_unaligned_be64(cmd + 2);
num_blocks = get_unaligned_be32(cmd + 10);
}
if (lba + num_blocks > sdebug_capacity) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
return check_condition_result;
}
if (!write_since_sync || (cmd[1] & 0x2))
res = SDEG_RES_IMMED_MASK;
else /* delay if write_since_sync and IMMED clear */
write_since_sync = false;
return res;
}
/*
* Assuming the LBA+num_blocks is not out-of-range, this function will return
* CONDITION MET if the specified blocks will/have fitted in the cache, and
* a GOOD status otherwise. Model a disk with a big cache and yield
* CONDITION MET. Actually tries to bring range in main memory into the
* cache associated with the CPU(s).
*/
static int resp_pre_fetch(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
int res = 0;
u64 lba;
u64 block, rest = 0;
u32 nblks;
u8 *cmd = scp->cmnd;
struct sdeb_store_info *sip = devip2sip(devip, true);
u8 *fsp = sip->storep;
if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */
lba = get_unaligned_be32(cmd + 2);
nblks = get_unaligned_be16(cmd + 7);
} else { /* PRE-FETCH(16) */
lba = get_unaligned_be64(cmd + 2);
nblks = get_unaligned_be32(cmd + 10);
}
if (lba + nblks > sdebug_capacity) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
return check_condition_result;
}
if (!fsp)
goto fini;
/* PRE-FETCH spec says nothing about LBP or PI so skip them */
block = do_div(lba, sdebug_store_sectors);
if (block + nblks > sdebug_store_sectors)
rest = block + nblks - sdebug_store_sectors;
/* Try to bring the PRE-FETCH range into CPU's cache */
sdeb_data_read_lock(sip);
prefetch_range(fsp + (sdebug_sector_size * block),
(nblks - rest) * sdebug_sector_size);
if (rest)
prefetch_range(fsp, rest * sdebug_sector_size);
sdeb_data_read_unlock(sip);
fini:
if (cmd[1] & 0x2)
res = SDEG_RES_IMMED_MASK;
return res | condition_met_result;
}
#define RL_BUCKET_ELEMS 8
/* Even though each pseudo target has a REPORT LUNS "well known logical unit"
* (W-LUN), the normal Linux scanning logic does not associate it with a
* device (e.g. /dev/sg7). The following magic will make that association:
* "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
* where <n> is a host number. If there are multiple targets in a host then
* the above will associate a W-LUN to each target. To only get a W-LUN
* for target 2, then use "echo '- 2 49409' > scan" .
*/
static int resp_report_luns(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
unsigned char *cmd = scp->cmnd;
unsigned int alloc_len;
unsigned char select_report;
u64 lun;
struct scsi_lun *lun_p;
u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
unsigned int lun_cnt; /* normal LUN count (max: 256) */
unsigned int wlun_cnt; /* report luns W-LUN count */
unsigned int tlun_cnt; /* total LUN count */
unsigned int rlen; /* response length (in bytes) */
int k, j, n, res;
unsigned int off_rsp = 0;
const int sz_lun = sizeof(struct scsi_lun);
clear_luns_changed_on_target(devip);
select_report = cmd[2];
alloc_len = get_unaligned_be32(cmd + 6);
if (alloc_len < 4) {
pr_err("alloc len too small %d\n", alloc_len);
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
return check_condition_result;
}
switch (select_report) {
case 0: /* all LUNs apart from W-LUNs */
lun_cnt = sdebug_max_luns;
wlun_cnt = 0;
break;
case 1: /* only W-LUNs */
lun_cnt = 0;
wlun_cnt = 1;
break;
case 2: /* all LUNs */
lun_cnt = sdebug_max_luns;
wlun_cnt = 1;
break;
case 0x10: /* only administrative LUs */
case 0x11: /* see SPC-5 */
case 0x12: /* only subsiduary LUs owned by referenced LU */
default:
pr_debug("select report invalid %d\n", select_report);
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
return check_condition_result;
}
if (sdebug_no_lun_0 && (lun_cnt > 0))
--lun_cnt;
tlun_cnt = lun_cnt + wlun_cnt;
rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
scsi_set_resid(scp, scsi_bufflen(scp));
pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
/* loops rely on sizeof response header same as sizeof lun (both 8) */
lun = sdebug_no_lun_0 ? 1 : 0;
for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
memset(arr, 0, sizeof(arr));
lun_p = (struct scsi_lun *)&arr[0];
if (k == 0) {
put_unaligned_be32(rlen, &arr[0]);
++lun_p;
j = 1;
}
for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
break;
int_to_scsilun(lun++, lun_p);
if (lun > 1 && sdebug_lun_am == SAM_LUN_AM_FLAT)
lun_p->scsi_lun[0] |= 0x40;
}
if (j < RL_BUCKET_ELEMS)
break;
n = j * sz_lun;
res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
if (res)
return res;
off_rsp += n;
}
if (wlun_cnt) {
int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
++j;
}
if (j > 0)
res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
return res;
}
static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
{
bool is_bytchk3 = false;
u8 bytchk;
int ret, j;
u32 vnum, a_num, off;
const u32 lb_size = sdebug_sector_size;
u64 lba;
u8 *arr;
u8 *cmd = scp->cmnd;
struct sdeb_store_info *sip = devip2sip(devip, true);
bytchk = (cmd[1] >> 1) & 0x3;
if (bytchk == 0) {
return 0; /* always claim internal verify okay */
} else if (bytchk == 2) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
return check_condition_result;
} else if (bytchk == 3) {
is_bytchk3 = true; /* 1 block sent, compared repeatedly */
}
switch (cmd[0]) {
case VERIFY_16:
lba = get_unaligned_be64(cmd + 2);
vnum = get_unaligned_be32(cmd + 10);
break;
case VERIFY: /* is VERIFY(10) */
lba = get_unaligned_be32(cmd + 2);
vnum = get_unaligned_be16(cmd + 7);
break;
default:
mk_sense_invalid_opcode(scp);
return check_condition_result;
}
if (vnum == 0)
return 0; /* not an error */
a_num = is_bytchk3 ? 1 : vnum;
/* Treat following check like one for read (i.e. no write) access */
ret = check_device_access_params(scp, lba, a_num, false);
if (ret)
return ret;
arr = kcalloc(lb_size, vnum, GFP_ATOMIC | __GFP_NOWARN);
if (!arr) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
INSUFF_RES_ASCQ);
return check_condition_result;
}
/* Not changing store, so only need read access */
sdeb_data_read_lock(sip);
ret = do_dout_fetch(scp, a_num, arr);
if (ret == -1) {
ret = DID_ERROR << 16;
goto cleanup;
} else if (sdebug_verbose && (ret < (a_num * lb_size))) {
sdev_printk(KERN_INFO, scp->device,
"%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
my_name, __func__, a_num * lb_size, ret);
}
if (is_bytchk3) {
for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size)
memcpy(arr + off, arr, lb_size);
}
ret = 0;
if (!comp_write_worker(sip, lba, vnum, arr, true)) {
mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
ret = check_condition_result;
goto cleanup;
}
cleanup:
sdeb_data_read_unlock(sip);
kfree(arr);
return ret;
}
#define RZONES_DESC_HD 64
/* Report zones depending on start LBA and reporting options */
static int resp_report_zones(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
unsigned int rep_max_zones, nrz = 0;
int ret = 0;
u32 alloc_len, rep_opts, rep_len;
bool partial;
u64 lba, zs_lba;
u8 *arr = NULL, *desc;
u8 *cmd = scp->cmnd;
struct sdeb_zone_state *zsp = NULL;
struct sdeb_store_info *sip = devip2sip(devip, false);
if (!sdebug_dev_is_zoned(devip)) {
mk_sense_invalid_opcode(scp);
return check_condition_result;
}
zs_lba = get_unaligned_be64(cmd + 2);
alloc_len = get_unaligned_be32(cmd + 10);
if (alloc_len == 0)
return 0; /* not an error */
rep_opts = cmd[14] & 0x3f;
partial = cmd[14] & 0x80;
if (zs_lba >= sdebug_capacity) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
return check_condition_result;
}
rep_max_zones = (alloc_len - 64) >> ilog2(RZONES_DESC_HD);
arr = kzalloc(alloc_len, GFP_ATOMIC | __GFP_NOWARN);
if (!arr) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
INSUFF_RES_ASCQ);
return check_condition_result;
}
sdeb_meta_read_lock(sip);
desc = arr + 64;
for (lba = zs_lba; lba < sdebug_capacity;
lba = zsp->z_start + zsp->z_size) {
if (WARN_ONCE(zbc_zone(devip, lba) == zsp, "lba = %llu\n", lba))
break;
zsp = zbc_zone(devip, lba);
switch (rep_opts) {
case 0x00:
/* All zones */
break;
case 0x01:
/* Empty zones */
if (zsp->z_cond != ZC1_EMPTY)
continue;
break;
case 0x02:
/* Implicit open zones */
if (zsp->z_cond != ZC2_IMPLICIT_OPEN)
continue;
break;
case 0x03:
/* Explicit open zones */
if (zsp->z_cond != ZC3_EXPLICIT_OPEN)
continue;
break;
case 0x04:
/* Closed zones */
if (zsp->z_cond != ZC4_CLOSED)
continue;
break;
case 0x05:
/* Full zones */
if (zsp->z_cond != ZC5_FULL)
continue;
break;
case 0x06:
case 0x07:
case 0x10:
/*
* Read-only, offline, reset WP recommended are
* not emulated: no zones to report;
*/
continue;
case 0x11:
/* non-seq-resource set */
if (!zsp->z_non_seq_resource)
continue;
break;
case 0x3e:
/* All zones except gap zones. */
if (zbc_zone_is_gap(zsp))
continue;
break;
case 0x3f:
/* Not write pointer (conventional) zones */
if (zbc_zone_is_seq(zsp))
continue;
break;
default:
mk_sense_buffer(scp, ILLEGAL_REQUEST,
INVALID_FIELD_IN_CDB, 0);
ret = check_condition_result;
goto fini;
}
if (nrz < rep_max_zones) {
/* Fill zone descriptor */
desc[0] = zsp->z_type;
desc[1] = zsp->z_cond << 4;
if (zsp->z_non_seq_resource)
desc[1] |= 1 << 1;
put_unaligned_be64((u64)zsp->z_size, desc + 8);
put_unaligned_be64((u64)zsp->z_start, desc + 16);
put_unaligned_be64((u64)zsp->z_wp, desc + 24);
desc += 64;
}
if (partial && nrz >= rep_max_zones)
break;
nrz++;
}
/* Report header */
/* Zone list length. */
put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0);
/* Maximum LBA */
put_unaligned_be64(sdebug_capacity - 1, arr + 8);
/* Zone starting LBA granularity. */
if (devip->zcap < devip->zsize)
put_unaligned_be64(devip->zsize, arr + 16);
rep_len = (unsigned long)desc - (unsigned long)arr;
ret = fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, rep_len));
fini:
sdeb_meta_read_unlock(sip);
kfree(arr);
return ret;
}
static int resp_atomic_write(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
struct sdeb_store_info *sip;
u8 *cmd = scp->cmnd;
u16 boundary, len;
u64 lba, lba_tmp;
int ret;
if (!scsi_debug_atomic_write()) {
mk_sense_invalid_opcode(scp);
return check_condition_result;
}
sip = devip2sip(devip, true);
lba = get_unaligned_be64(cmd + 2);
boundary = get_unaligned_be16(cmd + 10);
len = get_unaligned_be16(cmd + 12);
lba_tmp = lba;
if (sdebug_atomic_wr_align &&
do_div(lba_tmp, sdebug_atomic_wr_align)) {
/* Does not meet alignment requirement */
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
return check_condition_result;
}
if (sdebug_atomic_wr_gran && len % sdebug_atomic_wr_gran) {
/* Does not meet alignment requirement */
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
return check_condition_result;
}
if (boundary > 0) {
if (boundary > sdebug_atomic_wr_max_bndry) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 12, -1);
return check_condition_result;
}
if (len > sdebug_atomic_wr_max_length_bndry) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 12, -1);
return check_condition_result;
}
} else {
if (len > sdebug_atomic_wr_max_length) {
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 12, -1);
return check_condition_result;
}
}
ret = do_device_access(sip, scp, 0, lba, len, 0, true, true);
if (unlikely(ret == -1))
return DID_ERROR << 16;
if (unlikely(ret != len * sdebug_sector_size))
return DID_ERROR << 16;
return 0;
}
/* Logic transplanted from tcmu-runner, file_zbc.c */
static void zbc_open_all(struct sdebug_dev_info *devip)
{
struct sdeb_zone_state *zsp = &devip->zstate[0];
unsigned int i;
for (i = 0; i < devip->nr_zones; i++, zsp++) {
if (zsp->z_cond == ZC4_CLOSED)
zbc_open_zone(devip, &devip->zstate[i], true);
}
}
static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
{
int res = 0;
u64 z_id;
enum sdebug_z_cond zc;
u8 *cmd = scp->cmnd;
struct sdeb_zone_state *zsp;
bool all = cmd[14] & 0x01;
struct sdeb_store_info *sip = devip2sip(devip, false);
if (!sdebug_dev_is_zoned(devip)) {
mk_sense_invalid_opcode(scp);
return check_condition_result;
}
sdeb_meta_write_lock(sip);
if (all) {
/* Check if all closed zones can be open */
if (devip->max_open &&
devip->nr_exp_open + devip->nr_closed > devip->max_open) {
mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
INSUFF_ZONE_ASCQ);
res = check_condition_result;
goto fini;
}
/* Open all closed zones */
zbc_open_all(devip);
goto fini;
}
/* Open the specified zone */
z_id = get_unaligned_be64(cmd + 2);
if (z_id >= sdebug_capacity) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
res = check_condition_result;
goto fini;
}
zsp = zbc_zone(devip, z_id);
if (z_id != zsp->z_start) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
res = check_condition_result;
goto fini;
}
if (zbc_zone_is_conv(zsp)) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
res = check_condition_result;
goto fini;
}
zc = zsp->z_cond;
if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL)
goto fini;
if (devip->max_open && devip->nr_exp_open >= devip->max_open) {
mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
INSUFF_ZONE_ASCQ);
res = check_condition_result;
goto fini;
}
zbc_open_zone(devip, zsp, true);
fini:
sdeb_meta_write_unlock(sip);
return res;
}
static void zbc_close_all(struct sdebug_dev_info *devip)
{
unsigned int i;
for (i = 0; i < devip->nr_zones; i++)
zbc_close_zone(devip, &devip->zstate[i]);
}
static int resp_close_zone(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
int res = 0;
u64 z_id;
u8 *cmd = scp->cmnd;
struct sdeb_zone_state *zsp;
bool all = cmd[14] & 0x01;
struct sdeb_store_info *sip = devip2sip(devip, false);
if (!sdebug_dev_is_zoned(devip)) {
mk_sense_invalid_opcode(scp);
return check_condition_result;
}
sdeb_meta_write_lock(sip);
if (all) {
zbc_close_all(devip);
goto fini;
}
/* Close specified zone */
z_id = get_unaligned_be64(cmd + 2);
if (z_id >= sdebug_capacity) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
res = check_condition_result;
goto fini;
}
zsp = zbc_zone(devip, z_id);
if (z_id != zsp->z_start) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
res = check_condition_result;
goto fini;
}
if (zbc_zone_is_conv(zsp)) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
res = check_condition_result;
goto fini;
}
zbc_close_zone(devip, zsp);
fini:
sdeb_meta_write_unlock(sip);
return res;
}
static void zbc_finish_zone(struct sdebug_dev_info *devip,
struct sdeb_zone_state *zsp, bool empty)
{
enum sdebug_z_cond zc = zsp->z_cond;
if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN ||
zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) {
if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
zbc_close_zone(devip, zsp);
if (zsp->z_cond == ZC4_CLOSED)
devip->nr_closed--;
zsp->z_wp = zsp->z_start + zsp->z_size;
zsp->z_cond = ZC5_FULL;
}
}
static void zbc_finish_all(struct sdebug_dev_info *devip)
{
unsigned int i;
for (i = 0; i < devip->nr_zones; i++)
zbc_finish_zone(devip, &devip->zstate[i], false);
}
static int resp_finish_zone(struct scsi_cmnd *scp,
struct sdebug_dev_info *devip)
{
struct sdeb_zone_state *zsp;
int res = 0;
u64 z_id;
u8 *cmd = scp->cmnd;
bool all = cmd[14] & 0x01;
struct sdeb_store_info *sip = devip2sip(devip, false);
if (!sdebug_dev_is_zoned(devip)) {
mk_sense_invalid_opcode(scp);
return check_condition_result;
}
sdeb_meta_write_lock(sip);
if (all) {
zbc_finish_all(devip);
goto fini;
}
/* Finish the specified zone */
z_id = get_unaligned_be64(cmd + 2);
if (z_id >= sdebug_capacity) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
res = check_condition_result;
goto fini;
}
zsp = zbc_zone(devip, z_id);
if (z_id != zsp->z_start) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
res = check_condition_result;
goto fini;
}
if (zbc_zone_is_conv(zsp)) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
res = check_condition_result;
goto fini;
}
zbc_finish_zone(devip, zsp, true);
fini:
sdeb_meta_write_unlock(sip);
return res;
}
static void zbc_rwp_zone(struct sdebug_dev_info *devip,
struct sdeb_zone_state *zsp)
{
enum sdebug_z_cond zc;
struct sdeb_store_info *sip = devip2sip(devip, false);
if (!zbc_zone_is_seq(zsp))
return;
zc = zsp->z_cond;
if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
zbc_close_zone(devip, zsp);
if (zsp->z_cond == ZC4_CLOSED)
devip->nr_closed--;
if (zsp->z_wp > zsp->z_start)
memset(sip->storep + zsp->z_start * sdebug_sector_size, 0,
(zsp->z_wp - zsp->z_start) * sdebug_sector_size);
zsp->z_non_seq_resource = false;
zsp->z_wp = zsp->z_start;
zsp->z_cond = ZC1_EMPTY;
}
static void zbc_rwp_all(struct sdebug_dev_info *devip)
{
unsigned int i;
for (i = 0; i < devip->nr_zones; i++)
zbc_rwp_zone(devip, &devip->zstate[i]);
}
static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
{
struct sdeb_zone_state *zsp;
int res = 0;
u64 z_id;
u8 *cmd = scp->cmnd;
bool all = cmd[14] & 0x01;
struct sdeb_store_info *sip = devip2sip(devip, false);
if (!sdebug_dev_is_zoned(devip)) {
mk_sense_invalid_opcode(scp);
return check_condition_result;
}
sdeb_meta_write_lock(sip);
if (all) {
zbc_rwp_all(devip);
goto fini;
}
z_id = get_unaligned_be64(cmd + 2);
if (z_id >= sdebug_capacity) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
res = check_condition_result;
goto fini;
}
zsp = zbc_zone(devip, z_id);
if (z_id != zsp->z_start) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
res = check_condition_result;
goto fini;
}
if (zbc_zone_is_conv(zsp)) {
mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
res = check_condition_result;
goto fini;
}
zbc_rwp_zone(devip, zsp);
fini:
sdeb_meta_write_unlock(sip);
return res;
}
static u32 get_tag(struct scsi_cmnd *cmnd)
{
return blk_mq_unique_tag(scsi_cmd_to_rq(cmnd));
}
/* Queued (deferred) command completions converge here. */
static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
{
struct sdebug_queued_cmd *sqcp = container_of(sd_dp, struct sdebug_queued_cmd, sd_dp);
unsigned long flags;
struct scsi_cmnd *scp = sqcp->scmd;
struct sdebug_scsi_cmd *sdsc;
bool aborted;
if (sdebug_statistics) {
atomic_inc(&sdebug_completions);
if (raw_smp_processor_id() != sd_dp->issuing_cpu)
atomic_inc(&sdebug_miss_cpus);
}
if (!scp) {
pr_err("scmd=NULL\n");
goto out;
}
sdsc = scsi_cmd_priv(scp);
spin_lock_irqsave(&sdsc->lock, flags);
aborted = sd_dp->aborted;
if (unlikely(aborted))
sd_dp->aborted = false;
ASSIGN_QUEUED_CMD(scp, NULL);
spin_unlock_irqrestore(&sdsc->lock, flags);
if (aborted) {
pr_info("bypassing scsi_done() due to aborted cmd, kicking-off EH\n");
blk_abort_request(scsi_cmd_to_rq(scp));
goto out;
}
scsi_done(scp); /* callback to mid level */
out:
sdebug_free_queued_cmd(sqcp);
}
/* When high resolution timer goes off this function is called. */
static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
{
struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
hrt);
sdebug_q_cmd_complete(sd_dp);
return HRTIMER_NORESTART;
}
/* When work queue schedules work, it calls this function. */
static void sdebug_q_cmd_wq_complete(struct work_struct *work)
{
struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
ew.work);
sdebug_q_cmd_complete(sd_dp);
}
static bool got_shared_uuid;
static uuid_t shared_uuid;
static int sdebug_device_create_zones(struct sdebug_dev_info *devip)
{
struct sdeb_zone_state *zsp;
sector_t capacity = get_sdebug_capacity();
sector_t conv_capacity;
sector_t zstart = 0;
unsigned int i;
/*
* Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out
* a zone size allowing for at least 4 zones on the device. Otherwise,
* use the specified zone size checking that at least 2 zones can be
* created for the device.
*/
if (!sdeb_zbc_zone_size_mb) {
devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M)
>> ilog2(sdebug_sector_size);
while (capacity < devip->zsize << 2 && devip->zsize >= 2)
devip->zsize >>= 1;
if (devip->zsize < 2) {
pr_err("Device capacity too small\n");
return -EINVAL;
}
} else {
if (!is_power_of_2(sdeb_zbc_zone_size_mb)) {
pr_err("Zone size is not a power of 2\n");
return -EINVAL;
}
devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M)
>> ilog2(sdebug_sector_size);
if (devip->zsize >= capacity) {
pr_err("Zone size too large for device capacity\n");
return -EINVAL;
}
}
devip->zsize_shift = ilog2(devip->zsize);
devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift;
if (sdeb_zbc_zone_cap_mb == 0) {
devip->zcap = devip->zsize;
} else {
devip->zcap = (sdeb_zbc_zone_cap_mb * SZ_1M) >>
ilog2(sdebug_sector_size);
if (devip->zcap > devip->zsize) {
pr_err("Zone capacity too large\n");
return -EINVAL;
}
}
conv_capacity = (sector_t)sdeb_zbc_nr_conv << devip->zsize_shift;
if (conv_capacity >= capacity) {
pr_err("Number of conventional zones too large\n");
return -EINVAL;
}
devip->nr_conv_zones = sdeb_zbc_nr_conv;
devip->nr_seq_zones = ALIGN(capacity - conv_capacity, devip->zsize) >>
devip->zsize_shift;
devip->nr_zones = devip->nr_conv_zones + devip->nr_seq_zones;
/* Add gap zones if zone capacity is smaller than the zone size */
if (devip->zcap < devip->zsize)
devip->nr_zones += devip->nr_seq_zones;
if (devip->zoned) {
/* zbc_max_open_zones can be 0, meaning "not reported" */
if (sdeb_zbc_max_open >= devip->nr_zones - 1)
devip->max_open = (devip->nr_zones - 1) / 2;
else
devip->max_open = sdeb_zbc_max_open;
}
devip->zstate = kcalloc(devip->nr_zones,
sizeof(struct sdeb_zone_state), GFP_KERNEL);
if (!devip->zstate)
return -ENOMEM;
for (i = 0; i < devip->nr_zones; i++) {
zsp = &devip->zstate[i];
zsp->z_start = zstart;
if (i < devip->nr_conv_zones) {
zsp->z_type = ZBC_ZTYPE_CNV;
zsp->z_cond = ZBC_NOT_WRITE_POINTER;
zsp->z_wp = (sector_t)-1;
zsp->z_size =
min_t(u64, devip->zsize, capacity - zstart);
} else if ((zstart & (devip->zsize - 1)) == 0) {
if (devip->zoned)
zsp->z_type = ZBC_ZTYPE_SWR;
else
zsp->z_type = ZBC_ZTYPE_SWP;
zsp->z_cond = ZC1_EMPTY;
zsp->z_wp = zsp->z_start;
zsp->z_size =
min_t(u64, devip->zcap, capacity - zstart);
} else {
zsp->z_type = ZBC_ZTYPE_GAP;
zsp->z_cond = ZBC_NOT_WRITE_POINTER;
zsp->z_wp = (sector_t)-1;
zsp->z_size = min_t(u64, devip->zsize - devip->zcap,
capacity - zstart);
}
WARN_ON_ONCE((int)zsp->z_size <= 0);
zstart += zsp->z_size;
}
return 0;
}
static struct sdebug_dev_info *sdebug_device_create(
struct sdebug_host_info *sdbg_host, gfp_t flags)
{
struct sdebug_dev_info *devip;
devip = kzalloc(sizeof(*devip), flags);
if (devip) {
if (sdebug_uuid_ctl == 1)
uuid_gen(&devip->lu_name);
else if (sdebug_uuid_ctl == 2) {
if (got_shared_uuid)
devip->lu_name = shared_uuid;
else {
uuid_gen(&shared_uuid);
got_shared_uuid = true;
devip->lu_name = shared_uuid;
}
}
devip->sdbg_host = sdbg_host;
if (sdeb_zbc_in_use) {
devip->zoned = sdeb_zbc_model == BLK_ZONED_HM;
if (sdebug_device_create_zones(devip)) {
kfree(devip);
return NULL;
}
} else {
devip->zoned = false;
}
devip->create_ts = ktime_get_boottime();
atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0));
spin_lock_init(&devip->list_lock);
INIT_LIST_HEAD(&devip->inject_err_list);
list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
}
return devip;
}
static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
{
struct sdebug_host_info *sdbg_host;
struct sdebug_dev_info *open_devip = NULL;
struct sdebug_dev_info *devip;
sdbg_host = shost_to_sdebug_host(sdev->host);
list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
if ((devip->used) && (devip->channel == sdev->channel) &&
(devip->target == sdev->id) &&
(devip->lun == sdev->lun))
return devip;
else {
if ((!devip->used) && (!open_devip))
open_devip = devip;
}
}
if (!open_devip) { /* try and make a new one */
open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
if (!open_devip) {
pr_err("out of memory at line %d\n", __LINE__);
return NULL;
}
}
open_devip->channel = sdev->channel;
open_devip->target = sdev->id;
open_devip->lun = sdev->lun;
open_devip->sdbg_host = sdbg_host;
set_bit(SDEBUG_UA_POOCCUR, open_devip->uas_bm);
open_devip->used = true;
return open_devip;
}
static int scsi_debug_slave_alloc(struct scsi_device *sdp)
{
if (sdebug_verbose)
pr_info("slave_alloc <%u %u %u %llu>\n",
sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
return 0;
}
static int scsi_debug_slave_configure(struct scsi_device *sdp)
{
struct sdebug_dev_info *devip =
(struct sdebug_dev_info *)sdp->hostdata;
struct dentry *dentry;
if (sdebug_verbose)
pr_info("slave_configure <%u %u %u %llu>\n",
sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
if (devip == NULL) {
devip = find_build_dev_info(sdp);
if (devip == NULL)
return 1; /* no resources, will be marked offline */
}
sdp->hostdata = devip;
if (sdebug_no_uld)
sdp->no_uld_attach = 1;
config_cdb_len(sdp);
if (sdebug_allow_restart)
sdp->allow_restart = 1;
devip->debugfs_entry = debugfs_create_dir(dev_name(&sdp->sdev_dev),
sdebug_debugfs_root);
if (IS_ERR_OR_NULL(devip->debugfs_entry))
pr_info("%s: failed to create debugfs directory for device %s\n",
__func__, dev_name(&sdp->sdev_gendev));
dentry = debugfs_create_file("error", 0600, devip->debugfs_entry, sdp,
&sdebug_error_fops);
if (IS_ERR_OR_NULL(dentry))
pr_info("%s: failed to create error file for device %s\n",
__func__, dev_name(&sdp->sdev_gendev));
return 0;
}
static void scsi_debug_slave_destroy(struct scsi_device *sdp)
{
struct sdebug_dev_info *devip =
(struct sdebug_dev_info *)sdp->hostdata;
struct sdebug_err_inject *err;
if (sdebug_verbose)
pr_info("slave_destroy <%u %u %u %llu>\n",
sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
if (!devip)
return;
spin_lock(&devip->list_lock);
list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
list_del_rcu(&err->list);
call_rcu(&err->rcu, sdebug_err_free);
}
spin_unlock(&devip->list_lock);
debugfs_remove(devip->debugfs_entry);
/* make this slot available for re-use */
devip->used = false;
sdp->hostdata = NULL;
}
/* Returns true if we require the queued memory to be freed by the caller. */
static bool stop_qc_helper(struct sdebug_defer *sd_dp,
enum sdeb_defer_type defer_t)
{
if (defer_t == SDEB_DEFER_HRT) {
int res = hrtimer_try_to_cancel(&sd_dp->hrt);
switch (res) {
case 0: /* Not active, it must have already run */
case -1: /* -1 It's executing the CB */
return false;
case 1: /* Was active, we've now cancelled */
default:
return true;
}
} else if (defer_t == SDEB_DEFER_WQ) {
/* Cancel if pending */
if (cancel_work_sync(&sd_dp->ew.work))
return true;
/* Was not pending, so it must have run */
return false;
} else if (defer_t == SDEB_DEFER_POLL) {
return true;
}
return false;
}
static bool scsi_debug_stop_cmnd(struct scsi_cmnd *cmnd)
{
enum sdeb_defer_type l_defer_t;
struct sdebug_defer *sd_dp;
struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd);
struct sdebug_queued_cmd *sqcp = TO_QUEUED_CMD(cmnd);
lockdep_assert_held(&sdsc->lock);
if (!sqcp)
return false;
sd_dp = &sqcp->sd_dp;
l_defer_t = READ_ONCE(sd_dp->defer_t);
ASSIGN_QUEUED_CMD(cmnd, NULL);
if (stop_qc_helper(sd_dp, l_defer_t))
sdebug_free_queued_cmd(sqcp);
return true;
}
/*
* Called from scsi_debug_abort() only, which is for timed-out cmd.
*/
static bool scsi_debug_abort_cmnd(struct scsi_cmnd *cmnd)
{
struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd);
unsigned long flags;
bool res;
spin_lock_irqsave(&sdsc->lock, flags);
res = scsi_debug_stop_cmnd(cmnd);
spin_unlock_irqrestore(&sdsc->lock, flags);
return res;
}
/*
* All we can do is set the cmnd as internally aborted and wait for it to
* finish. We cannot call scsi_done() as normal completion path may do that.
*/
static bool sdebug_stop_cmnd(struct request *rq, void *data)
{
scsi_debug_abort_cmnd(blk_mq_rq_to_pdu(rq));
return true;
}
/* Deletes (stops) timers or work queues of all queued commands */
static void stop_all_queued(void)
{
struct sdebug_host_info *sdhp;
mutex_lock(&sdebug_host_list_mutex);
list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
struct Scsi_Host *shost = sdhp->shost;
blk_mq_tagset_busy_iter(&shost->tag_set, sdebug_stop_cmnd, NULL);
}
mutex_unlock(&sdebug_host_list_mutex);
}
static int sdebug_fail_abort(struct scsi_cmnd *cmnd)
{
struct scsi_device *sdp = cmnd->device;
struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
struct sdebug_err_inject *err;
unsigned char *cmd = cmnd->cmnd;
int ret = 0;
if (devip == NULL)
return 0;
rcu_read_lock();
list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
if (err->type == ERR_ABORT_CMD_FAILED &&
(err->cmd == cmd[0] || err->cmd == 0xff)) {
ret = !!err->cnt;
if (err->cnt < 0)
err->cnt++;
rcu_read_unlock();
return ret;
}
}
rcu_read_unlock();
return 0;
}
static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
{
bool ok = scsi_debug_abort_cmnd(SCpnt);
u8 *cmd = SCpnt->cmnd;
u8 opcode = cmd[0];
++num_aborts;
if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
sdev_printk(KERN_INFO, SCpnt->device,
"%s: command%s found\n", __func__,
ok ? "" : " not");
if (sdebug_fail_abort(SCpnt)) {
scmd_printk(KERN_INFO, SCpnt, "fail abort command 0x%x\n",
opcode);
return FAILED;
}
return SUCCESS;
}
static bool scsi_debug_stop_all_queued_iter(struct request *rq, void *data)
{
struct scsi_device *sdp = data;
struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
if (scmd->device == sdp)
scsi_debug_abort_cmnd(scmd);
return true;
}
/* Deletes (stops) timers or work queues of all queued commands per sdev */
static void scsi_debug_stop_all_queued(struct scsi_device *sdp)
{
struct Scsi_Host *shost = sdp->host;
blk_mq_tagset_busy_iter(&shost->tag_set,
scsi_debug_stop_all_queued_iter, sdp);
}
static int sdebug_fail_lun_reset(struct scsi_cmnd *cmnd)
{
struct scsi_device *sdp = cmnd->device;
struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
struct sdebug_err_inject *err;
unsigned char *cmd = cmnd->cmnd;
int ret = 0;
if (devip == NULL)
return 0;
rcu_read_lock();
list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
if (err->type == ERR_LUN_RESET_FAILED &&
(err->cmd == cmd[0] || err->cmd == 0xff)) {
ret = !!err->cnt;
if (err->cnt < 0)
err->cnt++;
rcu_read_unlock();
return ret;
}
}
rcu_read_unlock();
return 0;
}
static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt)
{
struct scsi_device *sdp = SCpnt->device;
struct sdebug_dev_info *devip = sdp->hostdata;
u8 *cmd = SCpnt->cmnd;
u8 opcode = cmd[0];
++num_dev_resets;
if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
scsi_debug_stop_all_queued(sdp);
if (devip)
set_bit(SDEBUG_UA_POR, devip->uas_bm);
if (sdebug_fail_lun_reset(SCpnt)) {
scmd_printk(KERN_INFO, SCpnt, "fail lun reset 0x%x\n", opcode);
return FAILED;
}
return SUCCESS;
}
static int sdebug_fail_target_reset(struct scsi_cmnd *cmnd)
{
struct scsi_target *starget = scsi_target(cmnd->device);
struct sdebug_target_info *targetip =
(struct sdebug_target_info *)starget->hostdata;
if (targetip)
return targetip->reset_fail;
return 0;
}
static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
{
struct scsi_device *sdp = SCpnt->device;
struct sdebug_host_info *sdbg_host = shost_to_sdebug_host(sdp->host);
struct sdebug_dev_info *devip;
u8 *cmd = SCpnt->cmnd;
u8 opcode = cmd[0];
int k = 0;
++num_target_resets;
if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
if (devip->target == sdp->id) {
set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
++k;
}
}
if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
sdev_printk(KERN_INFO, sdp,
"%s: %d device(s) found in target\n", __func__, k);
if (sdebug_fail_target_reset(SCpnt)) {
scmd_printk(KERN_INFO, SCpnt, "fail target reset 0x%x\n",
opcode);
return FAILED;
}
return SUCCESS;
}
static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt)
{
struct scsi_device *sdp = SCpnt->device;
struct sdebug_host_info *sdbg_host = shost_to_sdebug_host(sdp->host);
struct sdebug_dev_info *devip;
int k = 0;
++num_bus_resets;
if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
++k;
}
if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
sdev_printk(KERN_INFO, sdp,
"%s: %d device(s) found in host\n", __func__, k);
return SUCCESS;
}
static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt)
{
struct sdebug_host_info *sdbg_host;
struct sdebug_dev_info *devip;
int k = 0;
++num_host_resets;
if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
mutex_lock(&sdebug_host_list_mutex);
list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
list_for_each_entry(devip, &sdbg_host->dev_info_list,
dev_list) {
set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
++k;
}
}
mutex_unlock(&sdebug_host_list_mutex);
stop_all_queued();
if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
sdev_printk(KERN_INFO, SCpnt->device,
"%s: %d device(s) found\n", __func__, k);
return SUCCESS;
}
static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size)
{
struct msdos_partition *pp;
int starts[SDEBUG_MAX_PARTS + 2], max_part_secs;
int sectors_per_part, num_sectors, k;
int heads_by_sects, start_sec, end_sec;
/* assume partition table already zeroed */
if ((sdebug_num_parts < 1) || (store_size < 1048576))
return;
if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
sdebug_num_parts = SDEBUG_MAX_PARTS;
pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
}
num_sectors = (int)get_sdebug_capacity();
sectors_per_part = (num_sectors - sdebug_sectors_per)
/ sdebug_num_parts;
heads_by_sects = sdebug_heads * sdebug_sectors_per;
starts[0] = sdebug_sectors_per;
max_part_secs = sectors_per_part;
for (k = 1; k < sdebug_num_parts; ++k) {
starts[k] = ((k * sectors_per_part) / heads_by_sects)
* heads_by_sects;
if (starts[k] - starts[k - 1] < max_part_secs)
max_part_secs = starts[k] - starts[k - 1];
}
starts[sdebug_num_parts] = num_sectors;
starts[sdebug_num_parts + 1] = 0;
ramp[510] = 0x55; /* magic partition markings */
ramp[511] = 0xAA;
pp = (struct msdos_partition *)(ramp + 0x1be);
for (k = 0; starts[k + 1]; ++k, ++pp) {
start_sec = starts[k];
end_sec = starts[k] + max_part_secs - 1;
pp->boot_ind = 0;
pp->cyl = start_sec / heads_by_sects;
pp->head = (start_sec - (pp->cyl * heads_by_sects))
/ sdebug_sectors_per;
pp->sector = (start_sec % sdebug_sectors_per) + 1;
pp->end_cyl = end_sec / heads_by_sects;
pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
/ sdebug_sectors_per;
pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
pp->start_sect = cpu_to_le32(start_sec);
pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
pp->sys_ind = 0x83; /* plain Linux partition */
}
}
static void block_unblock_all_queues(bool block)
{
struct sdebug_host_info *sdhp;
lockdep_assert_held(&sdebug_host_list_mutex);
list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
struct Scsi_Host *shost = sdhp->shost;
if (block)
scsi_block_requests(shost);
else
scsi_unblock_requests(shost);
}
}
/* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
* commands will be processed normally before triggers occur.
*/
static void tweak_cmnd_count(void)
{
int count, modulo;
modulo = abs(sdebug_every_nth);
if (modulo < 2)
return;
mutex_lock(&sdebug_host_list_mutex);
block_unblock_all_queues(true);
count = atomic_read(&sdebug_cmnd_count);
atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
block_unblock_all_queues(false);
mutex_unlock(&sdebug_host_list_mutex);
}
static void clear_queue_stats(void)
{
atomic_set(&sdebug_cmnd_count, 0);
atomic_set(&sdebug_completions, 0);
atomic_set(&sdebug_miss_cpus, 0);
atomic_set(&sdebug_a_tsf, 0);
}
static bool inject_on_this_cmd(void)
{
if (sdebug_every_nth == 0)
return false;
return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0;
}
#define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */
void sdebug_free_queued_cmd(struct sdebug_queued_cmd *sqcp)
{
if (sqcp)
kmem_cache_free(queued_cmd_cache, sqcp);
}
static struct sdebug_queued_cmd *sdebug_alloc_queued_cmd(struct scsi_cmnd *scmd)
{
struct sdebug_queued_cmd *sqcp;
struct sdebug_defer *sd_dp;
sqcp = kmem_cache_zalloc(queued_cmd_cache, GFP_ATOMIC);
if (!sqcp)
return NULL;
sd_dp = &sqcp->sd_dp;
hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL_PINNED);
sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
sqcp->scmd = scmd;
return sqcp;
}
/* Complete the processing of the thread that queued a SCSI command to this
* driver. It either completes the command by calling cmnd_done() or
* schedules a hr timer or work queue then returns 0. Returns
* SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
*/
static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
int scsi_result,
int (*pfp)(struct scsi_cmnd *,
struct sdebug_dev_info *),
int delta_jiff, int ndelay)
{
struct request *rq = scsi_cmd_to_rq(cmnd);
bool polled = rq->cmd_flags & REQ_POLLED;
struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd);
unsigned long flags;
u64 ns_from_boot = 0;
struct sdebug_queued_cmd *sqcp;
struct scsi_device *sdp;
struct sdebug_defer *sd_dp;
if (unlikely(devip == NULL)) {
if (scsi_result == 0)
scsi_result = DID_NO_CONNECT << 16;
goto respond_in_thread;
}
sdp = cmnd->device;
if (delta_jiff == 0)
goto respond_in_thread;
if (unlikely(sdebug_every_nth && (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
(scsi_result == 0))) {
int num_in_q = scsi_device_busy(sdp);
int qdepth = cmnd->device->queue_depth;
if ((num_in_q == qdepth) &&
(atomic_inc_return(&sdebug_a_tsf) >=
abs(sdebug_every_nth))) {
atomic_set(&sdebug_a_tsf, 0);
scsi_result = device_qfull_result;
if (unlikely(SDEBUG_OPT_Q_NOISE & sdebug_opts))
sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, <inject> status: TASK SET FULL\n",
__func__, num_in_q);
}
}
sqcp = sdebug_alloc_queued_cmd(cmnd);
if (!sqcp) {
pr_err("%s no alloc\n", __func__);
return SCSI_MLQUEUE_HOST_BUSY;
}
sd_dp = &sqcp->sd_dp;
if (polled)
ns_from_boot = ktime_get_boottime_ns();
/* one of the resp_*() response functions is called here */
cmnd->result = pfp ? pfp(cmnd, devip) : 0;
if (cmnd->result & SDEG_RES_IMMED_MASK) {
cmnd->result &= ~SDEG_RES_IMMED_MASK;
delta_jiff = ndelay = 0;
}
if (cmnd->result == 0 && scsi_result != 0)
cmnd->result = scsi_result;
if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) {
if (atomic_read(&sdeb_inject_pending)) {
mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO);
atomic_set(&sdeb_inject_pending, 0);
cmnd->result = check_condition_result;
}
}
if (unlikely(sdebug_verbose && cmnd->result))
sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
__func__, cmnd->result);
if (delta_jiff > 0 || ndelay > 0) {
ktime_t kt;
if (delta_jiff > 0) {
u64 ns = jiffies_to_nsecs(delta_jiff);
if (sdebug_random && ns < U32_MAX) {
ns = get_random_u32_below((u32)ns);
} else if (sdebug_random) {
ns >>= 12; /* scale to 4 usec precision */
if (ns < U32_MAX) /* over 4 hours max */
ns = get_random_u32_below((u32)ns);
ns <<= 12;
}
kt = ns_to_ktime(ns);
} else { /* ndelay has a 4.2 second max */
kt = sdebug_random ? get_random_u32_below((u32)ndelay) :
(u32)ndelay;
if (ndelay < INCLUSIVE_TIMING_MAX_NS) {
u64 d = ktime_get_boottime_ns() - ns_from_boot;
if (kt <= d) { /* elapsed duration >= kt */
/* call scsi_done() from this thread */
sdebug_free_queued_cmd(sqcp);
scsi_done(cmnd);
return 0;
}
/* otherwise reduce kt by elapsed time */
kt -= d;
}
}
if (sdebug_statistics)
sd_dp->issuing_cpu = raw_smp_processor_id();
if (polled) {
spin_lock_irqsave(&sdsc->lock, flags);
sd_dp->cmpl_ts = ktime_add(ns_to_ktime(ns_from_boot), kt);
ASSIGN_QUEUED_CMD(cmnd, sqcp);
WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL);
spin_unlock_irqrestore(&sdsc->lock, flags);
} else {
/* schedule the invocation of scsi_done() for a later time */
spin_lock_irqsave(&sdsc->lock, flags);
ASSIGN_QUEUED_CMD(cmnd, sqcp);
WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_HRT);
hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
/*
* The completion handler will try to grab sqcp->lock,
* so there is no chance that the completion handler
* will call scsi_done() until we release the lock
* here (so ok to keep referencing sdsc).
*/
spin_unlock_irqrestore(&sdsc->lock, flags);
}
} else { /* jdelay < 0, use work queue */
if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) &&
atomic_read(&sdeb_inject_pending))) {
sd_dp->aborted = true;
atomic_set(&sdeb_inject_pending, 0);
sdev_printk(KERN_INFO, sdp, "abort request tag=%#x\n",
blk_mq_unique_tag_to_tag(get_tag(cmnd)));
}
if (sdebug_statistics)
sd_dp->issuing_cpu = raw_smp_processor_id();
if (polled) {
spin_lock_irqsave(&sdsc->lock, flags);
ASSIGN_QUEUED_CMD(cmnd, sqcp);
sd_dp->cmpl_ts = ns_to_ktime(ns_from_boot);
WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL);
spin_unlock_irqrestore(&sdsc->lock, flags);
} else {
spin_lock_irqsave(&sdsc->lock, flags);
ASSIGN_QUEUED_CMD(cmnd, sqcp);
WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_WQ);
schedule_work(&sd_dp->ew.work);
spin_unlock_irqrestore(&sdsc->lock, flags);
}
}
return 0;
respond_in_thread: /* call back to mid-layer using invocation thread */
cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0;
cmnd->result &= ~SDEG_RES_IMMED_MASK;
if (cmnd->result == 0 && scsi_result != 0)
cmnd->result = scsi_result;
scsi_done(cmnd);
return 0;
}
/* Note: The following macros create attribute files in the
/sys/module/scsi_debug/parameters directory. Unfortunately this
driver is unaware of a change and cannot trigger auxiliary actions
as it can when the corresponding attribute in the
/sys/bus/pseudo/drivers/scsi_debug directory is changed.
*/
module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
module_param_named(ato, sdebug_ato, int, S_IRUGO);
module_param_named(cdb_len, sdebug_cdb_len, int, 0644);
module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
module_param_named(dif, sdebug_dif, int, S_IRUGO);
module_param_named(dix, sdebug_dix, int, S_IRUGO);
module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
module_param_named(guard, sdebug_guard, uint, S_IRUGO);
module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO);
module_param_string(inq_product, sdebug_inq_product_id,
sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR);
module_param_string(inq_rev, sdebug_inq_product_rev,
sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR);
module_param_string(inq_vendor, sdebug_inq_vendor_id,
sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR);
module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
module_param_named(atomic_wr, sdebug_atomic_wr, int, S_IRUGO);
module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
module_param_named(lun_format, sdebug_lun_am_i, int, S_IRUGO | S_IWUSR);
module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
module_param_named(medium_error_count, sdebug_medium_error_count, int,
S_IRUGO | S_IWUSR);
module_param_named(medium_error_start, sdebug_medium_error_start, int,
S_IRUGO | S_IWUSR);
module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
module_param_named(no_rwlock, sdebug_no_rwlock, bool, S_IRUGO | S_IWUSR);
module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO);
module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
module_param_named(per_host_store, sdebug_per_host_store, bool,
S_IRUGO | S_IWUSR);
module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR);
module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
module_param_named(submit_queues, submit_queues, int, S_IRUGO);
module_param_named(poll_queues, poll_queues, int, S_IRUGO);
module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO);
module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
module_param_named(atomic_wr_max_length, sdebug_atomic_wr_max_length, int, S_IRUGO);
module_param_named(atomic_wr_align, sdebug_atomic_wr_align, int, S_IRUGO);
module_param_named(atomic_wr_gran, sdebug_atomic_wr_gran, int, S_IRUGO);
module_param_named(atomic_wr_max_length_bndry, sdebug_atomic_wr_max_length_bndry, int, S_IRUGO);
module_param_named(atomic_wr_max_bndry, sdebug_atomic_wr_max_bndry, int, S_IRUGO);
module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
S_IRUGO | S_IWUSR);
module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR);
module_param_named(write_same_length, sdebug_write_same_length, int,
S_IRUGO | S_IWUSR);
module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO);
module_param_named(zone_cap_mb, sdeb_zbc_zone_cap_mb, int, S_IRUGO);
module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO);
module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO);
module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO);
module_param_named(allow_restart, sdebug_allow_restart, bool, S_IRUGO | S_IWUSR);
MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
MODULE_DESCRIPTION("SCSI debug adapter driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(SDEBUG_VERSION);
MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)");
MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)");
MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
MODULE_PARM_DESC(host_max_queue,
"host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])");
MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")");
MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\""
SDEBUG_VERSION "\")");
MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")");
MODULE_PARM_DESC(lbprz,
"on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
MODULE_PARM_DESC(atomic_write, "enable ATOMIC WRITE support, support WRITE ATOMIC(16) (def=0)");
MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
MODULE_PARM_DESC(lun_format, "LUN format: 0->peripheral (def); 1 --> flat address method");
MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error");
MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error");
MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
MODULE_PARM_DESC(no_rwlock, "don't protect user data reads+writes (def=0)");
MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)");
MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)");
MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
MODULE_PARM_DESC(poll_queues, "support for iouring iopoll queues (1 to max(submit_queues - 1))");
MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns");
MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)");
MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
MODULE_PARM_DESC(atomic_wr_max_length, "max # of blocks can be atomically written in one cmd (def=8192)");
MODULE_PARM_DESC(atomic_wr_align, "minimum alignment of atomic write in blocks (def=2)");
MODULE_PARM_DESC(atomic_wr_gran, "minimum granularity of atomic write in blocks (def=2)");
MODULE_PARM_DESC(atomic_wr_max_length_bndry, "max # of blocks can be atomically written in one cmd with boundary set (def=8192)");
MODULE_PARM_DESC(atomic_wr_max_bndry, "max # boundaries per atomic write (def=128)");
MODULE_PARM_DESC(uuid_ctl,
"1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
MODULE_PARM_DESC(wp, "Write Protect (def=0)");
MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix");
MODULE_PARM_DESC(zone_cap_mb, "Zone capacity in MiB (def=zone size)");
MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)");
MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)");
MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)");
MODULE_PARM_DESC(allow_restart, "Set scsi_device's allow_restart flag(def=0)");
#define SDEBUG_INFO_LEN 256
static char sdebug_info[SDEBUG_INFO_LEN];
static const char *scsi_debug_info(struct Scsi_Host *shp)
{
int k;
k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
my_name, SDEBUG_VERSION, sdebug_version_date);
if (k >= (SDEBUG_INFO_LEN - 1))
return sdebug_info;
scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
" dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
sdebug_dev_size_mb, sdebug_opts, submit_queues,
"statistics", (int)sdebug_statistics);
return sdebug_info;
}
/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
int length)
{
char arr[16];
int opts;
int minLen = length > 15 ? 15 : length;
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
return -EACCES;
memcpy(arr, buffer, minLen);
arr[minLen] = '\0';
if (1 != sscanf(arr, "%d", &opts))
return -EINVAL;
sdebug_opts = opts;
sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
if (sdebug_every_nth != 0)
tweak_cmnd_count();
return length;
}
struct sdebug_submit_queue_data {
int *first;
int *last;
int queue_num;
};
static bool sdebug_submit_queue_iter(struct request *rq, void *opaque)
{
struct sdebug_submit_queue_data *data = opaque;
u32 unique_tag = blk_mq_unique_tag(rq);
u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag);
u16 tag = blk_mq_unique_tag_to_tag(unique_tag);
int queue_num = data->queue_num;
if (hwq != queue_num)
return true;
/* Rely on iter'ing in ascending tag order */
if (*data->first == -1)
*data->first = *data->last = tag;
else
*data->last = tag;
return true;
}
/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
* same for each scsi_debug host (if more than one). Some of the counters
* output are not atomics so might be inaccurate in a busy system. */
static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
{
struct sdebug_host_info *sdhp;
int j;
seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
SDEBUG_VERSION, sdebug_version_date);
seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
sdebug_opts, sdebug_every_nth);
seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
sdebug_sector_size, "bytes");
seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
num_aborts);
seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
num_dev_resets, num_target_resets, num_bus_resets,
num_host_resets);
seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
dix_reads, dix_writes, dif_errors);
seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000,
sdebug_statistics);
seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d, mq_polls=%d\n",
atomic_read(&sdebug_cmnd_count),
atomic_read(&sdebug_completions),
"miss_cpus", atomic_read(&sdebug_miss_cpus),
atomic_read(&sdebug_a_tsf),
atomic_read(&sdeb_mq_poll_count));
seq_printf(m, "submit_queues=%d\n", submit_queues);
for (j = 0; j < submit_queues; ++j) {
int f = -1, l = -1;
struct sdebug_submit_queue_data data = {
.queue_num = j,
.first = &f,
.last = &l,
};
seq_printf(m, " queue %d:\n", j);
blk_mq_tagset_busy_iter(&host->tag_set, sdebug_submit_queue_iter,
&data);
if (f >= 0) {
seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
"first,last bits", f, l);
}
}
seq_printf(m, "this host_no=%d\n", host->host_no);
if (!xa_empty(per_store_ap)) {
bool niu;
int idx;
unsigned long l_idx;
struct sdeb_store_info *sip;
seq_puts(m, "\nhost list:\n");
j = 0;
list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
idx = sdhp->si_idx;
seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j,
sdhp->shost->host_no, idx);
++j;
}
seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n",
sdeb_most_recent_idx);
j = 0;
xa_for_each(per_store_ap, l_idx, sip) {
niu = xa_get_mark(per_store_ap, l_idx,
SDEB_XA_NOT_IN_USE);
idx = (int)l_idx;
seq_printf(m, " %d: idx=%d%s\n", j, idx,
(niu ? " not_in_use" : ""));
++j;
}
}
return 0;
}
static ssize_t delay_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
}
/* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
* of delay is jiffies.
*/
static ssize_t delay_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int jdelay, res;
if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
res = count;
if (sdebug_jdelay != jdelay) {
struct sdebug_host_info *sdhp;
mutex_lock(&sdebug_host_list_mutex);
block_unblock_all_queues(true);
list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
struct Scsi_Host *shost = sdhp->shost;
if (scsi_host_busy(shost)) {
res = -EBUSY; /* queued commands */
break;
}
}
if (res > 0) {
sdebug_jdelay = jdelay;
sdebug_ndelay = 0;
}
block_unblock_all_queues(false);
mutex_unlock(&sdebug_host_list_mutex);
}
return res;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(delay);
static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
}
/* Returns -EBUSY if ndelay is being changed and commands are queued */
/* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int ndelay, res;
if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
(ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
res = count;
if (sdebug_ndelay != ndelay) {
struct sdebug_host_info *sdhp;
mutex_lock(&sdebug_host_list_mutex);
block_unblock_all_queues(true);
list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
struct Scsi_Host *shost = sdhp->shost;
if (scsi_host_busy(shost)) {
res = -EBUSY; /* queued commands */
break;
}
}
if (res > 0) {
sdebug_ndelay = ndelay;
sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
: DEF_JDELAY;
}
block_unblock_all_queues(false);
mutex_unlock(&sdebug_host_list_mutex);
}
return res;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(ndelay);
static ssize_t opts_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
}
static ssize_t opts_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int opts;
char work[20];
if (sscanf(buf, "%10s", work) == 1) {
if (strncasecmp(work, "0x", 2) == 0) {
if (kstrtoint(work + 2, 16, &opts) == 0)
goto opts_done;
} else {
if (kstrtoint(work, 10, &opts) == 0)
goto opts_done;
}
}
return -EINVAL;
opts_done:
sdebug_opts = opts;
sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
tweak_cmnd_count();
return count;
}
static DRIVER_ATTR_RW(opts);
static ssize_t ptype_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
}
static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
/* Cannot change from or to TYPE_ZBC with sysfs */
if (sdebug_ptype == TYPE_ZBC)
return -EINVAL;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
if (n == TYPE_ZBC)
return -EINVAL;
sdebug_ptype = n;
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(ptype);
static ssize_t dsense_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
}
static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
sdebug_dsense = n;
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(dsense);
static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
}
static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n, idx;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
bool want_store = (n == 0);
struct sdebug_host_info *sdhp;
n = (n > 0);
sdebug_fake_rw = (sdebug_fake_rw > 0);
if (sdebug_fake_rw == n)
return count; /* not transitioning so do nothing */
if (want_store) { /* 1 --> 0 transition, set up store */
if (sdeb_first_idx < 0) {
idx = sdebug_add_store();
if (idx < 0)
return idx;
} else {
idx = sdeb_first_idx;
xa_clear_mark(per_store_ap, idx,
SDEB_XA_NOT_IN_USE);
}
/* make all hosts use same store */
list_for_each_entry(sdhp, &sdebug_host_list,
host_list) {
if (sdhp->si_idx != idx) {
xa_set_mark(per_store_ap, sdhp->si_idx,
SDEB_XA_NOT_IN_USE);
sdhp->si_idx = idx;
}
}
sdeb_most_recent_idx = idx;
} else { /* 0 --> 1 transition is trigger for shrink */
sdebug_erase_all_stores(true /* apart from first */);
}
sdebug_fake_rw = n;
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(fake_rw);
static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
}
static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
sdebug_no_lun_0 = n;
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(no_lun_0);
static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
}
static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
sdebug_num_tgts = n;
sdebug_max_tgts_luns();
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(num_tgts);
static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
}
static DRIVER_ATTR_RO(dev_size_mb);
static ssize_t per_host_store_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store);
}
static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf,
size_t count)
{
bool v;
if (kstrtobool(buf, &v))
return -EINVAL;
sdebug_per_host_store = v;
return count;
}
static DRIVER_ATTR_RW(per_host_store);
static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
}
static DRIVER_ATTR_RO(num_parts);
static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
}
static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int nth;
char work[20];
if (sscanf(buf, "%10s", work) == 1) {
if (strncasecmp(work, "0x", 2) == 0) {
if (kstrtoint(work + 2, 16, &nth) == 0)
goto every_nth_done;
} else {
if (kstrtoint(work, 10, &nth) == 0)
goto every_nth_done;
}
}
return -EINVAL;
every_nth_done:
sdebug_every_nth = nth;
if (nth && !sdebug_statistics) {
pr_info("every_nth needs statistics=1, set it\n");
sdebug_statistics = true;
}
tweak_cmnd_count();
return count;
}
static DRIVER_ATTR_RW(every_nth);
static ssize_t lun_format_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_lun_am);
}
static ssize_t lun_format_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
bool changed;
if (kstrtoint(buf, 0, &n))
return -EINVAL;
if (n >= 0) {
if (n > (int)SAM_LUN_AM_FLAT) {
pr_warn("only LUN address methods 0 and 1 are supported\n");
return -EINVAL;
}
changed = ((int)sdebug_lun_am != n);
sdebug_lun_am = n;
if (changed && sdebug_scsi_level >= 5) { /* >= SPC-3 */
struct sdebug_host_info *sdhp;
struct sdebug_dev_info *dp;
mutex_lock(&sdebug_host_list_mutex);
list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
set_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
}
}
mutex_unlock(&sdebug_host_list_mutex);
}
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(lun_format);
static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
}
static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
bool changed;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
if (n > 256) {
pr_warn("max_luns can be no more than 256\n");
return -EINVAL;
}
changed = (sdebug_max_luns != n);
sdebug_max_luns = n;
sdebug_max_tgts_luns();
if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
struct sdebug_host_info *sdhp;
struct sdebug_dev_info *dp;
mutex_lock(&sdebug_host_list_mutex);
list_for_each_entry(sdhp, &sdebug_host_list,
host_list) {
list_for_each_entry(dp, &sdhp->dev_info_list,
dev_list) {
set_bit(SDEBUG_UA_LUNS_CHANGED,
dp->uas_bm);
}
}
mutex_unlock(&sdebug_host_list_mutex);
}
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(max_luns);
static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
}
/* N.B. max_queue can be changed while there are queued commands. In flight
* commands beyond the new max_queue will be completed. */
static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
(n <= SDEBUG_CANQUEUE) &&
(sdebug_host_max_queue == 0)) {
mutex_lock(&sdebug_host_list_mutex);
/* We may only change sdebug_max_queue when we have no shosts */
if (list_empty(&sdebug_host_list))
sdebug_max_queue = n;
else
count = -EBUSY;
mutex_unlock(&sdebug_host_list_mutex);
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(max_queue);
static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue);
}
static ssize_t no_rwlock_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_rwlock);
}
static ssize_t no_rwlock_store(struct device_driver *ddp, const char *buf, size_t count)
{
bool v;
if (kstrtobool(buf, &v))
return -EINVAL;
sdebug_no_rwlock = v;
return count;
}
static DRIVER_ATTR_RW(no_rwlock);
/*
* Since this is used for .can_queue, and we get the hc_idx tag from the bitmap
* in range [0, sdebug_host_max_queue), we can't change it.
*/
static DRIVER_ATTR_RO(host_max_queue);
static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
}
static DRIVER_ATTR_RO(no_uld);
static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
}
static DRIVER_ATTR_RO(scsi_level);
static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
}
static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
bool changed;
/* Ignore capacity change for ZBC drives for now */
if (sdeb_zbc_in_use)
return -ENOTSUPP;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
changed = (sdebug_virtual_gb != n);
sdebug_virtual_gb = n;
sdebug_capacity = get_sdebug_capacity();
if (changed) {
struct sdebug_host_info *sdhp;
struct sdebug_dev_info *dp;
mutex_lock(&sdebug_host_list_mutex);
list_for_each_entry(sdhp, &sdebug_host_list,
host_list) {
list_for_each_entry(dp, &sdhp->dev_info_list,
dev_list) {
set_bit(SDEBUG_UA_CAPACITY_CHANGED,
dp->uas_bm);
}
}
mutex_unlock(&sdebug_host_list_mutex);
}
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(virtual_gb);
static ssize_t add_host_show(struct device_driver *ddp, char *buf)
{
/* absolute number of hosts currently active is what is shown */
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts);
}
static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
size_t count)
{
bool found;
unsigned long idx;
struct sdeb_store_info *sip;
bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store;
int delta_hosts;
if (sscanf(buf, "%d", &delta_hosts) != 1)
return -EINVAL;
if (delta_hosts > 0) {
do {
found = false;
if (want_phs) {
xa_for_each_marked(per_store_ap, idx, sip,
SDEB_XA_NOT_IN_USE) {
sdeb_most_recent_idx = (int)idx;
found = true;
break;
}
if (found) /* re-use case */
sdebug_add_host_helper((int)idx);
else
sdebug_do_add_host(true);
} else {
sdebug_do_add_host(false);
}
} while (--delta_hosts);
} else if (delta_hosts < 0) {
do {
sdebug_do_remove_host(false);
} while (++delta_hosts);
}
return count;
}
static DRIVER_ATTR_RW(add_host);
static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
}
static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
sdebug_vpd_use_hostno = n;
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(vpd_use_hostno);
static ssize_t statistics_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
}
static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
if (n > 0)
sdebug_statistics = true;
else {
clear_queue_stats();
sdebug_statistics = false;
}
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(statistics);
static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
}
static DRIVER_ATTR_RO(sector_size);
static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
}
static DRIVER_ATTR_RO(submit_queues);
static ssize_t dix_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
}
static DRIVER_ATTR_RO(dix);
static ssize_t dif_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
}
static DRIVER_ATTR_RO(dif);
static ssize_t guard_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
}
static DRIVER_ATTR_RO(guard);
static ssize_t ato_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
}
static DRIVER_ATTR_RO(ato);
static ssize_t map_show(struct device_driver *ddp, char *buf)
{
ssize_t count = 0;
if (!scsi_debug_lbp())
return scnprintf(buf, PAGE_SIZE, "0-%u\n",
sdebug_store_sectors);
if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) {
struct sdeb_store_info *sip = xa_load(per_store_ap, 0);
if (sip)
count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
(int)map_size, sip->map_storep);
}
buf[count++] = '\n';
buf[count] = '\0';
return count;
}
static DRIVER_ATTR_RO(map);
static ssize_t random_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random);
}
static ssize_t random_store(struct device_driver *ddp, const char *buf,
size_t count)
{
bool v;
if (kstrtobool(buf, &v))
return -EINVAL;
sdebug_random = v;
return count;
}
static DRIVER_ATTR_RW(random);
static ssize_t removable_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
}
static ssize_t removable_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
sdebug_removable = (n > 0);
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(removable);
static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
}
/* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
sdebug_host_lock = (n > 0);
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(host_lock);
static ssize_t strict_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
}
static ssize_t strict_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int n;
if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
sdebug_strict = (n > 0);
return count;
}
return -EINVAL;
}
static DRIVER_ATTR_RW(strict);
static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
}
static DRIVER_ATTR_RO(uuid_ctl);
static ssize_t cdb_len_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len);
}
static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf,
size_t count)
{
int ret, n;
ret = kstrtoint(buf, 0, &n);
if (ret)
return ret;
sdebug_cdb_len = n;
all_config_cdb_len();
return count;
}
static DRIVER_ATTR_RW(cdb_len);
static const char * const zbc_model_strs_a[] = {
[BLK_ZONED_NONE] = "none",
[BLK_ZONED_HA] = "host-aware",
[BLK_ZONED_HM] = "host-managed",
};
static const char * const zbc_model_strs_b[] = {
[BLK_ZONED_NONE] = "no",
[BLK_ZONED_HA] = "aware",
[BLK_ZONED_HM] = "managed",
};
static const char * const zbc_model_strs_c[] = {
[BLK_ZONED_NONE] = "0",
[BLK_ZONED_HA] = "1",
[BLK_ZONED_HM] = "2",
};
static int sdeb_zbc_model_str(const char *cp)
{
int res = sysfs_match_string(zbc_model_strs_a, cp);
if (res < 0) {
res = sysfs_match_string(zbc_model_strs_b, cp);
if (res < 0) {
res = sysfs_match_string(zbc_model_strs_c, cp);
if (res < 0)
return -EINVAL;
}
}
return res;
}
static ssize_t zbc_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%s\n",
zbc_model_strs_a[sdeb_zbc_model]);
}
static DRIVER_ATTR_RO(zbc);
static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready);
}
static DRIVER_ATTR_RO(tur_ms_to_ready);
static ssize_t group_number_stats_show(struct device_driver *ddp, char *buf)
{
char *p = buf, *end = buf + PAGE_SIZE;
int i;
for (i = 0; i < ARRAY_SIZE(writes_by_group_number); i++)
p += scnprintf(p, end - p, "%d %ld\n", i,
atomic_long_read(&writes_by_group_number[i]));
return p - buf;
}
static ssize_t group_number_stats_store(struct device_driver *ddp,
const char *buf, size_t count)
{
int i;
for (i = 0; i < ARRAY_SIZE(writes_by_group_number); i++)
atomic_long_set(&writes_by_group_number[i], 0);
return count;
}
static DRIVER_ATTR_RW(group_number_stats);
/* Note: The following array creates attribute files in the
/sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
files (over those found in the /sys/module/scsi_debug/parameters
directory) is that auxiliary actions can be triggered when an attribute
is changed. For example see: add_host_store() above.
*/
static struct attribute *sdebug_drv_attrs[] = {
&driver_attr_delay.attr,
&driver_attr_opts.attr,
&driver_attr_ptype.attr,
&driver_attr_dsense.attr,
&driver_attr_fake_rw.attr,
&driver_attr_host_max_queue.attr,
&driver_attr_no_lun_0.attr,
&driver_attr_num_tgts.attr,
&driver_attr_dev_size_mb.attr,
&driver_attr_num_parts.attr,
&driver_attr_every_nth.attr,
&driver_attr_lun_format.attr,
&driver_attr_max_luns.attr,
&driver_attr_max_queue.attr,
&driver_attr_no_rwlock.attr,
&driver_attr_no_uld.attr,
&driver_attr_scsi_level.attr,
&driver_attr_virtual_gb.attr,
&driver_attr_add_host.attr,
&driver_attr_per_host_store.attr,
&driver_attr_vpd_use_hostno.attr,
&driver_attr_sector_size.attr,
&driver_attr_statistics.attr,
&driver_attr_submit_queues.attr,
&driver_attr_dix.attr,
&driver_attr_dif.attr,
&driver_attr_guard.attr,
&driver_attr_ato.attr,
&driver_attr_map.attr,
&driver_attr_random.attr,
&driver_attr_removable.attr,
&driver_attr_host_lock.attr,
&driver_attr_ndelay.attr,
&driver_attr_strict.attr,
&driver_attr_uuid_ctl.attr,
&driver_attr_cdb_len.attr,
&driver_attr_tur_ms_to_ready.attr,
&driver_attr_zbc.attr,
&driver_attr_group_number_stats.attr,
NULL,
};
ATTRIBUTE_GROUPS(sdebug_drv);
static struct device *pseudo_primary;
static int __init scsi_debug_init(void)
{
bool want_store = (sdebug_fake_rw == 0);
unsigned long sz;
int k, ret, hosts_to_add;
int idx = -1;
if (sdebug_ndelay >= 1000 * 1000 * 1000) {
pr_warn("ndelay must be less than 1 second, ignored\n");
sdebug_ndelay = 0;
} else if (sdebug_ndelay > 0)
sdebug_jdelay = JDELAY_OVERRIDDEN;
switch (sdebug_sector_size) {
case 512:
case 1024:
case 2048:
case 4096:
break;
default:
pr_err("invalid sector_size %d\n", sdebug_sector_size);
return -EINVAL;
}
switch (sdebug_dif) {
case T10_PI_TYPE0_PROTECTION:
break;
case T10_PI_TYPE1_PROTECTION:
case T10_PI_TYPE2_PROTECTION:
case T10_PI_TYPE3_PROTECTION:
have_dif_prot = true;
break;
default:
pr_err("dif must be 0, 1, 2 or 3\n");
return -EINVAL;
}
if (sdebug_num_tgts < 0) {
pr_err("num_tgts must be >= 0\n");
return -EINVAL;
}
if (sdebug_guard > 1) {
pr_err("guard must be 0 or 1\n");
return -EINVAL;
}
if (sdebug_ato > 1) {
pr_err("ato must be 0 or 1\n");
return -EINVAL;
}
if (sdebug_physblk_exp > 15) {
pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
return -EINVAL;
}
sdebug_lun_am = sdebug_lun_am_i;
if (sdebug_lun_am > SAM_LUN_AM_FLAT) {
pr_warn("Invalid LUN format %u, using default\n", (int)sdebug_lun_am);
sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
}
if (sdebug_max_luns > 256) {
if (sdebug_max_luns > 16384) {
pr_warn("max_luns can be no more than 16384, use default\n");
sdebug_max_luns = DEF_MAX_LUNS;
}
sdebug_lun_am = SAM_LUN_AM_FLAT;
}
if (sdebug_lowest_aligned > 0x3fff) {
pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
return -EINVAL;
}
if (submit_queues < 1) {
pr_err("submit_queues must be 1 or more\n");
return -EINVAL;
}
if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) {
pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE);
return -EINVAL;
}
if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) ||
(sdebug_host_max_queue < 0)) {
pr_err("host_max_queue must be in range [0 %d]\n",
SDEBUG_CANQUEUE);
return -EINVAL;
}
if (sdebug_host_max_queue &&
(sdebug_max_queue != sdebug_host_max_queue)) {
sdebug_max_queue = sdebug_host_max_queue;
pr_warn("fixing max submit queue depth to host max queue depth, %d\n",
sdebug_max_queue);
}
/*
* check for host managed zoned block device specified with
* ptype=0x14 or zbc=XXX.
*/
if (sdebug_ptype == TYPE_ZBC) {
sdeb_zbc_model = BLK_ZONED_HM;
} else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) {
k = sdeb_zbc_model_str(sdeb_zbc_model_s);
if (k < 0)
return k;
sdeb_zbc_model = k;
switch (sdeb_zbc_model) {
case BLK_ZONED_NONE:
case BLK_ZONED_HA:
sdebug_ptype = TYPE_DISK;
break;
case BLK_ZONED_HM:
sdebug_ptype = TYPE_ZBC;
break;
default:
pr_err("Invalid ZBC model\n");
return -EINVAL;
}
}
if (sdeb_zbc_model != BLK_ZONED_NONE) {
sdeb_zbc_in_use = true;
if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB;
}
if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
if (sdebug_dev_size_mb < 1)
sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
sz = (unsigned long)sdebug_dev_size_mb * 1048576;
sdebug_store_sectors = sz / sdebug_sector_size;
sdebug_capacity = get_sdebug_capacity();
/* play around with geometry, don't waste too much on track 0 */
sdebug_heads = 8;
sdebug_sectors_per = 32;
if (sdebug_dev_size_mb >= 256)
sdebug_heads = 64;
else if (sdebug_dev_size_mb >= 16)
sdebug_heads = 32;
sdebug_cylinders_per = (unsigned long)sdebug_capacity /
(sdebug_sectors_per * sdebug_heads);
if (sdebug_cylinders_per >= 1024) {
/* other LLDs do this; implies >= 1GB ram disk ... */
sdebug_heads = 255;
sdebug_sectors_per = 63;
sdebug_cylinders_per = (unsigned long)sdebug_capacity /
(sdebug_sectors_per * sdebug_heads);
}
if (scsi_debug_lbp()) {
sdebug_unmap_max_blocks =
clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
sdebug_unmap_max_desc =
clamp(sdebug_unmap_max_desc, 0U, 256U);
sdebug_unmap_granularity =
clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
if (sdebug_unmap_alignment &&
sdebug_unmap_granularity <=
sdebug_unmap_alignment) {
pr_err("ERR: unmap_granularity <= unmap_alignment\n");
return -EINVAL;
}
}
xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
if (want_store) {
idx = sdebug_add_store();
if (idx < 0)
return idx;
}
pseudo_primary = root_device_register("pseudo_0");
if (IS_ERR(pseudo_primary)) {
pr_warn("root_device_register() error\n");
ret = PTR_ERR(pseudo_primary);
goto free_vm;
}
ret = bus_register(&pseudo_lld_bus);
if (ret < 0) {
pr_warn("bus_register error: %d\n", ret);
goto dev_unreg;
}
ret = driver_register(&sdebug_driverfs_driver);
if (ret < 0) {
pr_warn("driver_register error: %d\n", ret);
goto bus_unreg;
}
hosts_to_add = sdebug_add_host;
sdebug_add_host = 0;
queued_cmd_cache = KMEM_CACHE(sdebug_queued_cmd, SLAB_HWCACHE_ALIGN);
if (!queued_cmd_cache) {
ret = -ENOMEM;
goto driver_unreg;
}
sdebug_debugfs_root = debugfs_create_dir("scsi_debug", NULL);
if (IS_ERR_OR_NULL(sdebug_debugfs_root))
pr_info("%s: failed to create initial debugfs directory\n", __func__);
for (k = 0; k < hosts_to_add; k++) {
if (want_store && k == 0) {
ret = sdebug_add_host_helper(idx);
if (ret < 0) {
pr_err("add_host_helper k=%d, error=%d\n",
k, -ret);
break;
}
} else {
ret = sdebug_do_add_host(want_store &&
sdebug_per_host_store);
if (ret < 0) {
pr_err("add_host k=%d error=%d\n", k, -ret);
break;
}
}
}
if (sdebug_verbose)
pr_info("built %d host(s)\n", sdebug_num_hosts);
return 0;
driver_unreg:
driver_unregister(&sdebug_driverfs_driver);
bus_unreg:
bus_unregister(&pseudo_lld_bus);
dev_unreg:
root_device_unregister(pseudo_primary);
free_vm:
sdebug_erase_store(idx, NULL);
return ret;
}
static void __exit scsi_debug_exit(void)
{
int k = sdebug_num_hosts;
for (; k; k--)
sdebug_do_remove_host(true);
kmem_cache_destroy(queued_cmd_cache);
driver_unregister(&sdebug_driverfs_driver);
bus_unregister(&pseudo_lld_bus);
root_device_unregister(pseudo_primary);
sdebug_erase_all_stores(false);
xa_destroy(per_store_ap);
debugfs_remove(sdebug_debugfs_root);
}
device_initcall(scsi_debug_init);
module_exit(scsi_debug_exit);
static void sdebug_release_adapter(struct device *dev)
{
struct sdebug_host_info *sdbg_host;
sdbg_host = dev_to_sdebug_host(dev);
kfree(sdbg_host);
}
/* idx must be valid, if sip is NULL then it will be obtained using idx */
static void sdebug_erase_store(int idx, struct sdeb_store_info *sip)
{
if (idx < 0)
return;
if (!sip) {
if (xa_empty(per_store_ap))
return;
sip = xa_load(per_store_ap, idx);
if (!sip)
return;
}
vfree(sip->map_storep);
vfree(sip->dif_storep);
vfree(sip->storep);
xa_erase(per_store_ap, idx);
kfree(sip);
}
/* Assume apart_from_first==false only in shutdown case. */
static void sdebug_erase_all_stores(bool apart_from_first)
{
unsigned long idx;
struct sdeb_store_info *sip = NULL;
xa_for_each(per_store_ap, idx, sip) {
if (apart_from_first)
apart_from_first = false;
else
sdebug_erase_store(idx, sip);
}
if (apart_from_first)
sdeb_most_recent_idx = sdeb_first_idx;
}
/*
* Returns store xarray new element index (idx) if >=0 else negated errno.
* Limit the number of stores to 65536.
*/
static int sdebug_add_store(void)
{
int res;
u32 n_idx;
unsigned long iflags;
unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576;
struct sdeb_store_info *sip = NULL;
struct xa_limit xal = { .max = 1 << 16, .min = 0 };
sip = kzalloc(sizeof(*sip), GFP_KERNEL);
if (!sip)
return -ENOMEM;
xa_lock_irqsave(per_store_ap, iflags);
res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC);
if (unlikely(res < 0)) {
xa_unlock_irqrestore(per_store_ap, iflags);
kfree(sip);
pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res);
return res;
}
sdeb_most_recent_idx = n_idx;
if (sdeb_first_idx < 0)
sdeb_first_idx = n_idx;
xa_unlock_irqrestore(per_store_ap, iflags);
res = -ENOMEM;
sip->storep = vzalloc(sz);
if (!sip->storep) {
pr_err("user data oom\n");
goto err;
}
if (sdebug_num_parts > 0)
sdebug_build_parts(sip->storep, sz);
/* DIF/DIX: what T10 calls Protection Information (PI) */
if (sdebug_dix) {
int dif_size;
dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple);
sip->dif_storep = vmalloc(dif_size);
pr_info("dif_storep %u bytes @ %pK\n", dif_size,
sip->dif_storep);
if (!sip->dif_storep) {
pr_err("DIX oom\n");
goto err;
}
memset(sip->dif_storep, 0xff, dif_size);
}
/* Logical Block Provisioning */
if (scsi_debug_lbp()) {
map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
sip->map_storep = vmalloc(array_size(sizeof(long),
BITS_TO_LONGS(map_size)));
pr_info("%lu provisioning blocks\n", map_size);
if (!sip->map_storep) {
pr_err("LBP map oom\n");
goto err;
}
bitmap_zero(sip->map_storep, map_size);
/* Map first 1KB for partition table */
if (sdebug_num_parts)
map_region(sip, 0, 2);
}
rwlock_init(&sip->macc_data_lck);
rwlock_init(&sip->macc_meta_lck);
rwlock_init(&sip->macc_sector_lck);
return (int)n_idx;
err:
sdebug_erase_store((int)n_idx, sip);
pr_warn("%s: failed, errno=%d\n", __func__, -res);
return res;
}
static int sdebug_add_host_helper(int per_host_idx)
{
int k, devs_per_host, idx;
int error = -ENOMEM;
struct sdebug_host_info *sdbg_host;
struct sdebug_dev_info *sdbg_devinfo, *tmp;
sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL);
if (!sdbg_host)
return -ENOMEM;
idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx;
if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE))
xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
sdbg_host->si_idx = idx;
INIT_LIST_HEAD(&sdbg_host->dev_info_list);
devs_per_host = sdebug_num_tgts * sdebug_max_luns;
for (k = 0; k < devs_per_host; k++) {
sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
if (!sdbg_devinfo)
goto clean;
}
mutex_lock(&sdebug_host_list_mutex);
list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
mutex_unlock(&sdebug_host_list_mutex);
sdbg_host->dev.bus = &pseudo_lld_bus;
sdbg_host->dev.parent = pseudo_primary;
sdbg_host->dev.release = &sdebug_release_adapter;
dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts);
error = device_register(&sdbg_host->dev);
if (error) {
mutex_lock(&sdebug_host_list_mutex);
list_del(&sdbg_host->host_list);
mutex_unlock(&sdebug_host_list_mutex);
goto clean;
}
++sdebug_num_hosts;
return 0;
clean:
list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
dev_list) {
list_del(&sdbg_devinfo->dev_list);
kfree(sdbg_devinfo->zstate);
kfree(sdbg_devinfo);
}
if (sdbg_host->dev.release)
put_device(&sdbg_host->dev);
else
kfree(sdbg_host);
pr_warn("%s: failed, errno=%d\n", __func__, -error);
return error;
}
static int sdebug_do_add_host(bool mk_new_store)
{
int ph_idx = sdeb_most_recent_idx;
if (mk_new_store) {
ph_idx = sdebug_add_store();
if (ph_idx < 0)
return ph_idx;
}
return sdebug_add_host_helper(ph_idx);
}
static void sdebug_do_remove_host(bool the_end)
{
int idx = -1;
struct sdebug_host_info *sdbg_host = NULL;
struct sdebug_host_info *sdbg_host2;
mutex_lock(&sdebug_host_list_mutex);
if (!list_empty(&sdebug_host_list)) {
sdbg_host = list_entry(sdebug_host_list.prev,
struct sdebug_host_info, host_list);
idx = sdbg_host->si_idx;
}
if (!the_end && idx >= 0) {
bool unique = true;
list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) {
if (sdbg_host2 == sdbg_host)
continue;
if (idx == sdbg_host2->si_idx) {
unique = false;
break;
}
}
if (unique) {
xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
if (idx == sdeb_most_recent_idx)
--sdeb_most_recent_idx;
}
}
if (sdbg_host)
list_del(&sdbg_host->host_list);
mutex_unlock(&sdebug_host_list_mutex);
if (!sdbg_host)
return;
device_unregister(&sdbg_host->dev);
--sdebug_num_hosts;
}
static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
{
struct sdebug_dev_info *devip = sdev->hostdata;
if (!devip)
return -ENODEV;
mutex_lock(&sdebug_host_list_mutex);
block_unblock_all_queues(true);
if (qdepth > SDEBUG_CANQUEUE) {
qdepth = SDEBUG_CANQUEUE;
pr_warn("%s: requested qdepth [%d] exceeds canqueue [%d], trim\n", __func__,
qdepth, SDEBUG_CANQUEUE);
}
if (qdepth < 1)
qdepth = 1;
if (qdepth != sdev->queue_depth)
scsi_change_queue_depth(sdev, qdepth);
block_unblock_all_queues(false);
mutex_unlock(&sdebug_host_list_mutex);
if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d\n", __func__, qdepth);
return sdev->queue_depth;
}
static bool fake_timeout(struct scsi_cmnd *scp)
{
if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
if (sdebug_every_nth < -1)
sdebug_every_nth = -1;
if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
return true; /* ignore command causing timeout */
else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
scsi_medium_access_command(scp))
return true; /* time out reads and writes */
}
return false;
}
/* Response to TUR or media access command when device stopped */
static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
{
int stopped_state;
u64 diff_ns = 0;
ktime_t now_ts = ktime_get_boottime();
struct scsi_device *sdp = scp->device;
stopped_state = atomic_read(&devip->stopped);
if (stopped_state == 2) {
if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
/* tur_ms_to_ready timer extinguished */
atomic_set(&devip->stopped, 0);
return 0;
}
}
mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1);
if (sdebug_verbose)
sdev_printk(KERN_INFO, sdp,
"%s: Not ready: in process of becoming ready\n", my_name);
if (scp->cmnd[0] == TEST_UNIT_READY) {
u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000;
if (diff_ns <= tur_nanosecs_to_ready)
diff_ns = tur_nanosecs_to_ready - diff_ns;
else
diff_ns = tur_nanosecs_to_ready;
/* As per 20-061r2 approved for spc6 by T10 on 20200716 */
do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */
scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE,
diff_ns);
return check_condition_result;
}
}
mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
if (sdebug_verbose)
sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n",
my_name);
return check_condition_result;
}
static void sdebug_map_queues(struct Scsi_Host *shost)
{
int i, qoff;
if (shost->nr_hw_queues == 1)
return;
for (i = 0, qoff = 0; i < HCTX_MAX_TYPES; i++) {
struct blk_mq_queue_map *map = &shost->tag_set.map[i];
map->nr_queues = 0;
if (i == HCTX_TYPE_DEFAULT)
map->nr_queues = submit_queues - poll_queues;
else if (i == HCTX_TYPE_POLL)
map->nr_queues = poll_queues;
if (!map->nr_queues) {
BUG_ON(i == HCTX_TYPE_DEFAULT);
continue;
}
map->queue_offset = qoff;
blk_mq_map_queues(map);
qoff += map->nr_queues;
}
}
struct sdebug_blk_mq_poll_data {
unsigned int queue_num;
int *num_entries;
};
/*
* We don't handle aborted commands here, but it does not seem possible to have
* aborted polled commands from schedule_resp()
*/
static bool sdebug_blk_mq_poll_iter(struct request *rq, void *opaque)
{
struct sdebug_blk_mq_poll_data *data = opaque;
struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(rq);
struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmd);
struct sdebug_defer *sd_dp;
u32 unique_tag = blk_mq_unique_tag(rq);
u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag);
struct sdebug_queued_cmd *sqcp;
unsigned long flags;
int queue_num = data->queue_num;
ktime_t time;
/* We're only interested in one queue for this iteration */
if (hwq != queue_num)
return true;
/* Subsequent checks would fail if this failed, but check anyway */
if (!test_bit(SCMD_STATE_INFLIGHT, &cmd->state))
return true;
time = ktime_get_boottime();
spin_lock_irqsave(&sdsc->lock, flags);
sqcp = TO_QUEUED_CMD(cmd);
if (!sqcp) {
spin_unlock_irqrestore(&sdsc->lock, flags);
return true;
}
sd_dp = &sqcp->sd_dp;
if (READ_ONCE(sd_dp->defer_t) != SDEB_DEFER_POLL) {
spin_unlock_irqrestore(&sdsc->lock, flags);
return true;
}
if (time < sd_dp->cmpl_ts) {
spin_unlock_irqrestore(&sdsc->lock, flags);
return true;
}
ASSIGN_QUEUED_CMD(cmd, NULL);
spin_unlock_irqrestore(&sdsc->lock, flags);
if (sdebug_statistics) {
atomic_inc(&sdebug_completions);
if (raw_smp_processor_id() != sd_dp->issuing_cpu)
atomic_inc(&sdebug_miss_cpus);
}
sdebug_free_queued_cmd(sqcp);
scsi_done(cmd); /* callback to mid level */
(*data->num_entries)++;
return true;
}
static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num)
{
int num_entries = 0;
struct sdebug_blk_mq_poll_data data = {
.queue_num = queue_num,
.num_entries = &num_entries,
};
blk_mq_tagset_busy_iter(&shost->tag_set, sdebug_blk_mq_poll_iter,
&data);
if (num_entries > 0)
atomic_add(num_entries, &sdeb_mq_poll_count);
return num_entries;
}
static int sdebug_timeout_cmd(struct scsi_cmnd *cmnd)
{
struct scsi_device *sdp = cmnd->device;
struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
struct sdebug_err_inject *err;
unsigned char *cmd = cmnd->cmnd;
int ret = 0;
if (devip == NULL)
return 0;
rcu_read_lock();
list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
if (err->type == ERR_TMOUT_CMD &&
(err->cmd == cmd[0] || err->cmd == 0xff)) {
ret = !!err->cnt;
if (err->cnt < 0)
err->cnt++;
rcu_read_unlock();
return ret;
}
}
rcu_read_unlock();
return 0;
}
static int sdebug_fail_queue_cmd(struct scsi_cmnd *cmnd)
{
struct scsi_device *sdp = cmnd->device;
struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
struct sdebug_err_inject *err;
unsigned char *cmd = cmnd->cmnd;
int ret = 0;
if (devip == NULL)
return 0;
rcu_read_lock();
list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
if (err->type == ERR_FAIL_QUEUE_CMD &&
(err->cmd == cmd[0] || err->cmd == 0xff)) {
ret = err->cnt ? err->queuecmd_ret : 0;
if (err->cnt < 0)
err->cnt++;
rcu_read_unlock();
return ret;
}
}
rcu_read_unlock();
return 0;
}
static int sdebug_fail_cmd(struct scsi_cmnd *cmnd, int *retval,
struct sdebug_err_inject *info)
{
struct scsi_device *sdp = cmnd->device;
struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
struct sdebug_err_inject *err;
unsigned char *cmd = cmnd->cmnd;
int ret = 0;
int result;
if (devip == NULL)
return 0;
rcu_read_lock();
list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
if (err->type == ERR_FAIL_CMD &&
(err->cmd == cmd[0] || err->cmd == 0xff)) {
if (!err->cnt) {
rcu_read_unlock();
return 0;
}
ret = !!err->cnt;
rcu_read_unlock();
goto out_handle;
}
}
rcu_read_unlock();
return 0;
out_handle:
if (err->cnt < 0)
err->cnt++;
mk_sense_buffer(cmnd, err->sense_key, err->asc, err->asq);
result = err->status_byte | err->host_byte << 16 | err->driver_byte << 24;
*info = *err;
*retval = schedule_resp(cmnd, devip, result, NULL, 0, 0);
return ret;
}
static int scsi_debug_queuecommand(struct Scsi_Host *shost,
struct scsi_cmnd *scp)
{
u8 sdeb_i;
struct scsi_device *sdp = scp->device;
const struct opcode_info_t *oip;
const struct opcode_info_t *r_oip;
struct sdebug_dev_info *devip;
u8 *cmd = scp->cmnd;
int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL;
int k, na;
int errsts = 0;
u64 lun_index = sdp->lun & 0x3FFF;
u32 flags;
u16 sa;
u8 opcode = cmd[0];
bool has_wlun_rl;
bool inject_now;
int ret = 0;
struct sdebug_err_inject err;
scsi_set_resid(scp, 0);
if (sdebug_statistics) {
atomic_inc(&sdebug_cmnd_count);
inject_now = inject_on_this_cmd();
} else {
inject_now = false;
}
if (unlikely(sdebug_verbose &&
!(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
char b[120];
int n, len, sb;
len = scp->cmd_len;
sb = (int)sizeof(b);
if (len > 32)
strcpy(b, "too long, over 32 bytes");
else {
for (k = 0, n = 0; k < len && n < sb; ++k)
n += scnprintf(b + n, sb - n, "%02x ",
(u32)cmd[k]);
}
sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name,
blk_mq_unique_tag(scsi_cmd_to_rq(scp)), b);
}
if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY)))
return SCSI_MLQUEUE_HOST_BUSY;
has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
if (unlikely(lun_index >= sdebug_max_luns && !has_wlun_rl))
goto err_out;
sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
devip = (struct sdebug_dev_info *)sdp->hostdata;
if (unlikely(!devip)) {
devip = find_build_dev_info(sdp);
if (NULL == devip)
goto err_out;
}
if (sdebug_timeout_cmd(scp)) {
scmd_printk(KERN_INFO, scp, "timeout command 0x%x\n", opcode);
return 0;
}
ret = sdebug_fail_queue_cmd(scp);
if (ret) {
scmd_printk(KERN_INFO, scp, "fail queue command 0x%x with 0x%x\n",
opcode, ret);
return ret;
}
if (sdebug_fail_cmd(scp, &ret, &err)) {
scmd_printk(KERN_INFO, scp,
"fail command 0x%x with hostbyte=0x%x, "
"driverbyte=0x%x, statusbyte=0x%x, "
"sense_key=0x%x, asc=0x%x, asq=0x%x\n",
opcode, err.host_byte, err.driver_byte,
err.status_byte, err.sense_key, err.asc, err.asq);
return ret;
}
if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending)))
atomic_set(&sdeb_inject_pending, 1);
na = oip->num_attached;
r_pfp = oip->pfp;
if (na) { /* multiple commands with this opcode */
r_oip = oip;
if (FF_SA & r_oip->flags) {
if (F_SA_LOW & oip->flags)
sa = 0x1f & cmd[1];
else
sa = get_unaligned_be16(cmd + 8);
for (k = 0; k <= na; oip = r_oip->arrp + k++) {
if (opcode == oip->opcode && sa == oip->sa)
break;
}
} else { /* since no service action only check opcode */
for (k = 0; k <= na; oip = r_oip->arrp + k++) {
if (opcode == oip->opcode)
break;
}
}
if (k > na) {
if (F_SA_LOW & r_oip->flags)
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
else if (F_SA_HIGH & r_oip->flags)
mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
else
mk_sense_invalid_opcode(scp);
goto check_cond;
}
} /* else (when na==0) we assume the oip is a match */
flags = oip->flags;
if (unlikely(F_INV_OP & flags)) {
mk_sense_invalid_opcode(scp);
goto check_cond;
}
if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
if (sdebug_verbose)
sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
my_name, opcode, " supported for wlun");
mk_sense_invalid_opcode(scp);
goto check_cond;
}
if (unlikely(sdebug_strict)) { /* check cdb against mask */
u8 rem;
int j;
for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
rem = ~oip->len_mask[k] & cmd[k];
if (rem) {
for (j = 7; j >= 0; --j, rem <<= 1) {
if (0x80 & rem)
break;
}
mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
goto check_cond;
}
}
}
if (unlikely(!(F_SKIP_UA & flags) &&
find_first_bit(devip->uas_bm,
SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
errsts = make_ua(scp, devip);
if (errsts)
goto check_cond;
}
if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) &&
atomic_read(&devip->stopped))) {
errsts = resp_not_ready(scp, devip);
if (errsts)
goto fini;
}
if (sdebug_fake_rw && (F_FAKE_RW & flags))
goto fini;
if (unlikely(sdebug_every_nth)) {
if (fake_timeout(scp))
return 0; /* ignore command: make trouble */
}
if (likely(oip->pfp))
pfp = oip->pfp; /* calls a resp_* function */
else
pfp = r_pfp; /* if leaf function ptr NULL, try the root's */
fini:
if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */
return schedule_resp(scp, devip, errsts, pfp, 0, 0);
else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 ||
sdebug_ndelay > 10000)) {
/*
* Skip long delays if ndelay <= 10 microseconds. Otherwise
* for Start Stop Unit (SSU) want at least 1 second delay and
* if sdebug_jdelay>1 want a long delay of that many seconds.
* For Synchronize Cache want 1/20 of SSU's delay.
*/
int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay;
int denom = (flags & F_SYNC_DELAY) ? 20 : 1;
jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ);
return schedule_resp(scp, devip, errsts, pfp, jdelay, 0);
} else
return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay,
sdebug_ndelay);
check_cond:
return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0);
err_out:
return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0);
}
static int sdebug_init_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
{
struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmd);
spin_lock_init(&sdsc->lock);
return 0;
}
static struct scsi_host_template sdebug_driver_template = {
.show_info = scsi_debug_show_info,
.write_info = scsi_debug_write_info,
.proc_name = sdebug_proc_name,
.name = "SCSI DEBUG",
.info = scsi_debug_info,
.slave_alloc = scsi_debug_slave_alloc,
.slave_configure = scsi_debug_slave_configure,
.slave_destroy = scsi_debug_slave_destroy,
.ioctl = scsi_debug_ioctl,
.queuecommand = scsi_debug_queuecommand,
.change_queue_depth = sdebug_change_qdepth,
.map_queues = sdebug_map_queues,
.mq_poll = sdebug_blk_mq_poll,
.eh_abort_handler = scsi_debug_abort,
.eh_device_reset_handler = scsi_debug_device_reset,
.eh_target_reset_handler = scsi_debug_target_reset,
.eh_bus_reset_handler = scsi_debug_bus_reset,
.eh_host_reset_handler = scsi_debug_host_reset,
.can_queue = SDEBUG_CANQUEUE,
.this_id = 7,
.sg_tablesize = SG_MAX_SEGMENTS,
.cmd_per_lun = DEF_CMD_PER_LUN,
.max_sectors = -1U,
.max_segment_size = -1U,
.module = THIS_MODULE,
.track_queue_depth = 1,
.cmd_size = sizeof(struct sdebug_scsi_cmd),
.init_cmd_priv = sdebug_init_cmd_priv,
.target_alloc = sdebug_target_alloc,
.target_destroy = sdebug_target_destroy,
};
static int sdebug_driver_probe(struct device *dev)
{
int error = 0;
struct sdebug_host_info *sdbg_host;
struct Scsi_Host *hpnt;
int hprot;
sdbg_host = dev_to_sdebug_host(dev);
sdebug_driver_template.can_queue = sdebug_max_queue;
sdebug_driver_template.cmd_per_lun = sdebug_max_queue;
if (!sdebug_clustering)
sdebug_driver_template.dma_boundary = PAGE_SIZE - 1;
hpnt = scsi_host_alloc(&sdebug_driver_template, 0);
if (NULL == hpnt) {
pr_err("scsi_host_alloc failed\n");
error = -ENODEV;
return error;
}
if (submit_queues > nr_cpu_ids) {
pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n",
my_name, submit_queues, nr_cpu_ids);
submit_queues = nr_cpu_ids;
}
/*
* Decide whether to tell scsi subsystem that we want mq. The
* following should give the same answer for each host.
*/
hpnt->nr_hw_queues = submit_queues;
if (sdebug_host_max_queue)
hpnt->host_tagset = 1;
/* poll queues are possible for nr_hw_queues > 1 */
if (hpnt->nr_hw_queues == 1 || (poll_queues < 1)) {
pr_warn("%s: trim poll_queues to 0. poll_q/nr_hw = (%d/%d)\n",
my_name, poll_queues, hpnt->nr_hw_queues);
poll_queues = 0;
}
/*
* Poll queues don't need interrupts, but we need at least one I/O queue
* left over for non-polled I/O.
* If condition not met, trim poll_queues to 1 (just for simplicity).
*/
if (poll_queues >= submit_queues) {
if (submit_queues < 3)
pr_warn("%s: trim poll_queues to 1\n", my_name);
else
pr_warn("%s: trim poll_queues to 1. Perhaps try poll_queues=%d\n",
my_name, submit_queues - 1);
poll_queues = 1;
}
if (poll_queues)
hpnt->nr_maps = 3;
sdbg_host->shost = hpnt;
if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
hpnt->max_id = sdebug_num_tgts + 1;
else
hpnt->max_id = sdebug_num_tgts;
/* = sdebug_max_luns; */
hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
hprot = 0;
switch (sdebug_dif) {
case T10_PI_TYPE1_PROTECTION:
hprot = SHOST_DIF_TYPE1_PROTECTION;
if (sdebug_dix)
hprot |= SHOST_DIX_TYPE1_PROTECTION;
break;
case T10_PI_TYPE2_PROTECTION:
hprot = SHOST_DIF_TYPE2_PROTECTION;
if (sdebug_dix)
hprot |= SHOST_DIX_TYPE2_PROTECTION;
break;
case T10_PI_TYPE3_PROTECTION:
hprot = SHOST_DIF_TYPE3_PROTECTION;
if (sdebug_dix)
hprot |= SHOST_DIX_TYPE3_PROTECTION;
break;
default:
if (sdebug_dix)
hprot |= SHOST_DIX_TYPE0_PROTECTION;
break;
}
scsi_host_set_prot(hpnt, hprot);
if (have_dif_prot || sdebug_dix)
pr_info("host protection%s%s%s%s%s%s%s\n",
(hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
(hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
(hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
(hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
(hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
(hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
(hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
if (sdebug_guard == 1)
scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
else
scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
if (sdebug_every_nth) /* need stats counters for every_nth */
sdebug_statistics = true;
error = scsi_add_host(hpnt, &sdbg_host->dev);
if (error) {
pr_err("scsi_add_host failed\n");
error = -ENODEV;
scsi_host_put(hpnt);
} else {
scsi_scan_host(hpnt);
}
return error;
}
static void sdebug_driver_remove(struct device *dev)
{
struct sdebug_host_info *sdbg_host;
struct sdebug_dev_info *sdbg_devinfo, *tmp;
sdbg_host = dev_to_sdebug_host(dev);
scsi_remove_host(sdbg_host->shost);
list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
dev_list) {
list_del(&sdbg_devinfo->dev_list);
kfree(sdbg_devinfo->zstate);
kfree(sdbg_devinfo);
}
scsi_host_put(sdbg_host->shost);
}
static const struct bus_type pseudo_lld_bus = {
.name = "pseudo",
.probe = sdebug_driver_probe,
.remove = sdebug_driver_remove,
.drv_groups = sdebug_drv_groups,
};
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