// SPDX-License-Identifier: GPL-2.0 /* * Functions related to sysfs handling */ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/bio.h> #include <linux/blkdev.h> #include <linux/backing-dev.h> #include <linux/blktrace_api.h> #include <linux/debugfs.h> #include "blk.h" #include "blk-mq.h" #include "blk-mq-debugfs.h" #include "blk-mq-sched.h" #include "blk-rq-qos.h" #include "blk-wbt.h" #include "blk-cgroup.h" #include "blk-throttle.h" struct queue_sysfs_entry { … }; static ssize_t queue_var_show(unsigned long var, char *page) { … } static ssize_t queue_var_store(unsigned long *var, const char *page, size_t count) { … } static ssize_t queue_requests_show(struct gendisk *disk, char *page) { … } static ssize_t queue_requests_store(struct gendisk *disk, const char *page, size_t count) { … } static ssize_t queue_ra_show(struct gendisk *disk, char *page) { … } static ssize_t queue_ra_store(struct gendisk *disk, const char *page, size_t count) { … } #define QUEUE_SYSFS_LIMIT_SHOW(_field) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … QUEUE_SYSFS_LIMIT_SHOW(…) … #define QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(_field) … QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(…) … QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(…) … QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(…) … QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(…) … QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES(…) … #define QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_KB(_field) … QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_KB(…) … QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_KB(…) … #define QUEUE_SYSFS_SHOW_CONST(_name, _val) … /* deprecated fields */ QUEUE_SYSFS_SHOW_CONST(discard_zeroes_data, 0) QUEUE_SYSFS_SHOW_CONST(write_same_max, 0) QUEUE_SYSFS_SHOW_CONST(poll_delay, -1) static ssize_t queue_max_discard_sectors_store(struct gendisk *disk, const char *page, size_t count) { … } /* * For zone append queue_max_zone_append_sectors does not just return the * underlying queue limits, but actually contains a calculation. Because of * that we can't simply use QUEUE_SYSFS_LIMIT_SHOW_SECTORS_TO_BYTES here. */ static ssize_t queue_zone_append_max_show(struct gendisk *disk, char *page) { … } static ssize_t queue_max_sectors_store(struct gendisk *disk, const char *page, size_t count) { … } static ssize_t queue_feature_store(struct gendisk *disk, const char *page, size_t count, blk_features_t feature) { … } #define QUEUE_SYSFS_FEATURE(_name, _feature) … QUEUE_SYSFS_FEATURE(rotational, BLK_FEAT_ROTATIONAL) QUEUE_SYSFS_FEATURE(add_random, BLK_FEAT_ADD_RANDOM) QUEUE_SYSFS_FEATURE(iostats, BLK_FEAT_IO_STAT) QUEUE_SYSFS_FEATURE(stable_writes, BLK_FEAT_STABLE_WRITES); #define QUEUE_SYSFS_FEATURE_SHOW(_name, _feature) … QUEUE_SYSFS_FEATURE_SHOW(poll, BLK_FEAT_POLL); QUEUE_SYSFS_FEATURE_SHOW(fua, BLK_FEAT_FUA); QUEUE_SYSFS_FEATURE_SHOW(dax, BLK_FEAT_DAX); static ssize_t queue_zoned_show(struct gendisk *disk, char *page) { … } static ssize_t queue_nr_zones_show(struct gendisk *disk, char *page) { … } static ssize_t queue_nomerges_show(struct gendisk *disk, char *page) { … } static ssize_t queue_nomerges_store(struct gendisk *disk, const char *page, size_t count) { … } static ssize_t queue_rq_affinity_show(struct gendisk *disk, char *page) { … } static ssize_t queue_rq_affinity_store(struct gendisk *disk, const char *page, size_t count) { … } static ssize_t queue_poll_delay_store(struct gendisk *disk, const char *page, size_t count) { … } static ssize_t queue_poll_store(struct gendisk *disk, const char *page, size_t count) { … } static ssize_t queue_io_timeout_show(struct gendisk *disk, char *page) { … } static ssize_t queue_io_timeout_store(struct gendisk *disk, const char *page, size_t count) { … } static ssize_t queue_wc_show(struct gendisk *disk, char *page) { … } static ssize_t queue_wc_store(struct gendisk *disk, const char *page, size_t count) { … } #define QUEUE_RO_ENTRY(_prefix, _name) … #define QUEUE_RW_ENTRY(_prefix, _name) … QUEUE_RW_ENTRY(queue_requests, "nr_requests"); QUEUE_RW_ENTRY(queue_ra, "read_ahead_kb"); QUEUE_RW_ENTRY(queue_max_sectors, "max_sectors_kb"); QUEUE_RO_ENTRY(queue_max_hw_sectors, "max_hw_sectors_kb"); QUEUE_RO_ENTRY(queue_max_segments, "max_segments"); QUEUE_RO_ENTRY(queue_max_integrity_segments, "max_integrity_segments"); QUEUE_RO_ENTRY(queue_max_segment_size, "max_segment_size"); QUEUE_RW_ENTRY(elv_iosched, "scheduler"); QUEUE_RO_ENTRY(queue_logical_block_size, "logical_block_size"); QUEUE_RO_ENTRY(queue_physical_block_size, "physical_block_size"); QUEUE_RO_ENTRY(queue_chunk_sectors, "chunk_sectors"); QUEUE_RO_ENTRY(queue_io_min, "minimum_io_size"); QUEUE_RO_ENTRY(queue_io_opt, "optimal_io_size"); QUEUE_RO_ENTRY(queue_max_discard_segments, "max_discard_segments"); QUEUE_RO_ENTRY(queue_discard_granularity, "discard_granularity"); QUEUE_RO_ENTRY(queue_max_hw_discard_sectors, "discard_max_hw_bytes"); QUEUE_RW_ENTRY(queue_max_discard_sectors, "discard_max_bytes"); QUEUE_RO_ENTRY(queue_discard_zeroes_data, "discard_zeroes_data"); QUEUE_RO_ENTRY(queue_atomic_write_max_sectors, "atomic_write_max_bytes"); QUEUE_RO_ENTRY(queue_atomic_write_boundary_sectors, "atomic_write_boundary_bytes"); QUEUE_RO_ENTRY(queue_atomic_write_unit_max, "atomic_write_unit_max_bytes"); QUEUE_RO_ENTRY(queue_atomic_write_unit_min, "atomic_write_unit_min_bytes"); QUEUE_RO_ENTRY(queue_write_same_max, "write_same_max_bytes"); QUEUE_RO_ENTRY(queue_max_write_zeroes_sectors, "write_zeroes_max_bytes"); QUEUE_RO_ENTRY(queue_zone_append_max, "zone_append_max_bytes"); QUEUE_RO_ENTRY(queue_zone_write_granularity, "zone_write_granularity"); QUEUE_RO_ENTRY(queue_zoned, "zoned"); QUEUE_RO_ENTRY(queue_nr_zones, "nr_zones"); QUEUE_RO_ENTRY(queue_max_open_zones, "max_open_zones"); QUEUE_RO_ENTRY(queue_max_active_zones, "max_active_zones"); QUEUE_RW_ENTRY(queue_nomerges, "nomerges"); QUEUE_RW_ENTRY(queue_rq_affinity, "rq_affinity"); QUEUE_RW_ENTRY(queue_poll, "io_poll"); QUEUE_RW_ENTRY(queue_poll_delay, "io_poll_delay"); QUEUE_RW_ENTRY(queue_wc, "write_cache"); QUEUE_RO_ENTRY(queue_fua, "fua"); QUEUE_RO_ENTRY(queue_dax, "dax"); QUEUE_RW_ENTRY(queue_io_timeout, "io_timeout"); QUEUE_RO_ENTRY(queue_virt_boundary_mask, "virt_boundary_mask"); QUEUE_RO_ENTRY(queue_dma_alignment, "dma_alignment"); /* legacy alias for logical_block_size: */ static struct queue_sysfs_entry queue_hw_sector_size_entry = …; QUEUE_RW_ENTRY(queue_rotational, "rotational"); QUEUE_RW_ENTRY(queue_iostats, "iostats"); QUEUE_RW_ENTRY(queue_add_random, "add_random"); QUEUE_RW_ENTRY(queue_stable_writes, "stable_writes"); #ifdef CONFIG_BLK_WBT static ssize_t queue_var_store64(s64 *var, const char *page) { … } static ssize_t queue_wb_lat_show(struct gendisk *disk, char *page) { … } static ssize_t queue_wb_lat_store(struct gendisk *disk, const char *page, size_t count) { … } QUEUE_RW_ENTRY(queue_wb_lat, "wbt_lat_usec"); #endif /* Common attributes for bio-based and request-based queues. */ static struct attribute *queue_attrs[] = …; /* Request-based queue attributes that are not relevant for bio-based queues. */ static struct attribute *blk_mq_queue_attrs[] = …; static umode_t queue_attr_visible(struct kobject *kobj, struct attribute *attr, int n) { … } static umode_t blk_mq_queue_attr_visible(struct kobject *kobj, struct attribute *attr, int n) { … } static struct attribute_group queue_attr_group = …; static struct attribute_group blk_mq_queue_attr_group = …; #define to_queue(atr) … static ssize_t queue_attr_show(struct kobject *kobj, struct attribute *attr, char *page) { … } static ssize_t queue_attr_store(struct kobject *kobj, struct attribute *attr, const char *page, size_t length) { … } static const struct sysfs_ops queue_sysfs_ops = …; static const struct attribute_group *blk_queue_attr_groups[] = …; static void blk_queue_release(struct kobject *kobj) { … } static const struct kobj_type blk_queue_ktype = …; static void blk_debugfs_remove(struct gendisk *disk) { … } /** * blk_register_queue - register a block layer queue with sysfs * @disk: Disk of which the request queue should be registered with sysfs. */ int blk_register_queue(struct gendisk *disk) { … } /** * blk_unregister_queue - counterpart of blk_register_queue() * @disk: Disk of which the request queue should be unregistered from sysfs. * * Note: the caller is responsible for guaranteeing that this function is called * after blk_register_queue() has finished. */ void blk_unregister_queue(struct gendisk *disk) { … }
Codebase Browser
linux