/*
* pNFS client data structures.
*
* Copyright (c) 2002
* The Regents of the University of Michigan
* All Rights Reserved
*
* Dean Hildebrand <[email protected]>
*
* Permission is granted to use, copy, create derivative works, and
* redistribute this software and such derivative works for any purpose,
* so long as the name of the University of Michigan is not used in
* any advertising or publicity pertaining to the use or distribution
* of this software without specific, written prior authorization. If
* the above copyright notice or any other identification of the
* University of Michigan is included in any copy of any portion of
* this software, then the disclaimer below must also be included.
*
* This software is provided as is, without representation or warranty
* of any kind either express or implied, including without limitation
* the implied warranties of merchantability, fitness for a particular
* purpose, or noninfringement. The Regents of the University of
* Michigan shall not be liable for any damages, including special,
* indirect, incidental, or consequential damages, with respect to any
* claim arising out of or in connection with the use of the software,
* even if it has been or is hereafter advised of the possibility of
* such damages.
*/
#ifndef FS_NFS_PNFS_H
#define FS_NFS_PNFS_H
#include <linux/refcount.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
#include <linux/workqueue.h>
struct nfs4_exception;
struct nfs4_opendata;
enum {
NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */
NFS_LSEG_ROC, /* roc bit received from server */
NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */
NFS_LSEG_LAYOUTRETURN, /* layoutreturn bit set for layoutreturn */
NFS_LSEG_UNAVAILABLE, /* unavailable bit set for temporary problem */
};
/* Individual ip address */
struct nfs4_pnfs_ds_addr {
struct sockaddr_storage da_addr;
size_t da_addrlen;
struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */
char *da_remotestr; /* human readable addr+port */
const char *da_netid;
int da_transport;
};
struct nfs4_pnfs_ds {
struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */
char *ds_remotestr; /* comma sep list of addrs */
struct list_head ds_addrs;
struct nfs_client *ds_clp;
refcount_t ds_count;
unsigned long ds_state;
#define NFS4DS_CONNECTING 0 /* ds is establishing connection */
};
struct pnfs_layout_segment {
struct list_head pls_list;
struct list_head pls_lc_list;
struct list_head pls_commits;
struct pnfs_layout_range pls_range;
refcount_t pls_refcount;
u32 pls_seq;
unsigned long pls_flags;
struct pnfs_layout_hdr *pls_layout;
};
enum pnfs_try_status {
PNFS_ATTEMPTED = 0,
PNFS_NOT_ATTEMPTED = 1,
PNFS_TRY_AGAIN = 2,
};
#ifdef CONFIG_NFS_V4_1
#define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
/*
* Default data server connection timeout and retrans vaules.
* Set by module parameters dataserver_timeo and dataserver_retrans.
*/
#define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */
#define NFS4_DEF_DS_RETRANS 5
#define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ)
enum {
NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
NFS_LAYOUT_RETURN, /* layoutreturn in progress */
NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */
NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */
NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */
NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */
NFS_LAYOUT_INODE_FREEING, /* The inode is being freed */
NFS_LAYOUT_HASHED, /* The layout visible */
NFS_LAYOUT_DRAIN,
};
enum layoutdriver_policy_flags {
/* Should the pNFS client commit and return the layout upon truncate to
* a smaller size */
PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
PNFS_READ_WHOLE_PAGE = 1 << 2,
PNFS_LAYOUTGET_ON_OPEN = 1 << 3,
};
enum pnfs_layout_destroy_mode {
PNFS_LAYOUT_INVALIDATE = 0,
PNFS_LAYOUT_BULK_RETURN,
PNFS_LAYOUT_FILE_BULK_RETURN,
};
struct nfs4_deviceid_node;
/* Per-layout driver specific registration structure */
struct pnfs_layoutdriver_type {
struct list_head pnfs_tblid;
const u32 id;
const char *name;
struct module *owner;
unsigned flags;
unsigned max_layoutget_response;
int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
int (*clear_layoutdriver) (struct nfs_server *);
struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
void (*free_layout_hdr) (struct pnfs_layout_hdr *);
struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
void (*free_lseg) (struct pnfs_layout_segment *lseg);
void (*add_lseg) (struct pnfs_layout_hdr *layoutid,
struct pnfs_layout_segment *lseg,
struct list_head *free_me);
void (*return_range) (struct pnfs_layout_hdr *lo,
struct pnfs_layout_range *range);
/* test for nfs page cache coalescing */
const struct nfs_pageio_ops *pg_read_ops;
const struct nfs_pageio_ops *pg_write_ops;
struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode);
int (*sync)(struct inode *inode, bool datasync);
/*
* Return PNFS_ATTEMPTED to indicate the layout code has attempted
* I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS
*/
enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *);
enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int);
void (*free_deviceid_node) (struct nfs4_deviceid_node *);
struct nfs4_deviceid_node * (*alloc_deviceid_node)
(struct nfs_server *server, struct pnfs_device *pdev,
gfp_t gfp_flags);
int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *);
void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data);
int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args);
int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args);
void (*cancel_io)(struct pnfs_layout_segment *lseg);
};
struct pnfs_commit_ops {
void (*setup_ds_info)(struct pnfs_ds_commit_info *,
struct pnfs_layout_segment *);
void (*release_ds_info)(struct pnfs_ds_commit_info *,
struct inode *inode);
int (*commit_pagelist)(struct inode *inode,
struct list_head *mds_pages,
int how,
struct nfs_commit_info *cinfo);
void (*mark_request_commit) (struct nfs_page *req,
struct pnfs_layout_segment *lseg,
struct nfs_commit_info *cinfo,
u32 ds_commit_idx);
void (*clear_request_commit) (struct nfs_page *req,
struct nfs_commit_info *cinfo);
int (*scan_commit_lists) (struct nfs_commit_info *cinfo,
int max);
void (*recover_commit_reqs) (struct list_head *list,
struct nfs_commit_info *cinfo);
};
struct pnfs_layout_hdr {
refcount_t plh_refcount;
atomic_t plh_outstanding; /* number of RPCs out */
struct list_head plh_layouts; /* other client layouts */
struct list_head plh_bulk_destroy;
struct list_head plh_segs; /* layout segments list */
struct list_head plh_return_segs; /* invalid layout segments */
unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */
unsigned long plh_retry_timestamp;
unsigned long plh_flags;
nfs4_stateid plh_stateid;
u32 plh_barrier; /* ignore lower seqids */
u32 plh_return_seq;
enum pnfs_iomode plh_return_iomode;
loff_t plh_lwb; /* last write byte for layoutcommit */
const struct cred *plh_lc_cred; /* layoutcommit cred */
struct inode *plh_inode;
struct rcu_head plh_rcu;
};
struct pnfs_device {
struct nfs4_deviceid dev_id;
unsigned int layout_type;
unsigned int mincount;
unsigned int maxcount; /* gdia_maxcount */
struct page **pages;
unsigned int pgbase;
unsigned int pglen; /* reply buffer length */
unsigned char nocache : 1;/* May not be cached */
};
#define NFS4_PNFS_GETDEVLIST_MAXNUM 16
struct pnfs_devicelist {
unsigned int eof;
unsigned int num_devs;
struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
};
extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
extern const struct pnfs_layoutdriver_type *pnfs_find_layoutdriver(u32 id);
extern void pnfs_put_layoutdriver(const struct pnfs_layoutdriver_type *ld);
/* nfs4proc.c */
#define PNFS_FL_LAYOUTRETURN_ASYNC (1U << 0)
#define PNFS_FL_LAYOUTRETURN_PRIVILEGED (1U << 1)
extern size_t max_response_pages(struct nfs_server *server);
extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
struct pnfs_device *dev,
const struct cred *cred);
extern struct pnfs_layout_segment *
nfs4_proc_layoutget(struct nfs4_layoutget *lgp,
struct nfs4_exception *exception);
extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp,
unsigned int flags);
/* pnfs.c */
void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *);
void unset_pnfs_layoutdriver(struct nfs_server *);
void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio, struct nfs_page *req);
void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
struct nfs_page *req, u64 wb_size);
void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *);
int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
struct nfs_page *prev, struct nfs_page *req);
void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
void pnfs_layoutget_free(struct nfs4_layoutget *lgp);
void pnfs_free_lseg_list(struct list_head *tmp_list);
void pnfs_destroy_layout(struct nfs_inode *);
void pnfs_destroy_layout_final(struct nfs_inode *);
void pnfs_destroy_all_layouts(struct nfs_client *);
int pnfs_layout_destroy_byfsid(struct nfs_client *clp, struct nfs_fsid *fsid,
enum pnfs_layout_destroy_mode mode);
int pnfs_layout_destroy_byclid(struct nfs_client *clp,
enum pnfs_layout_destroy_mode mode);
bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst,
struct pnfs_layout_range *dst_range,
struct inode *inode);
void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo);
void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
const nfs4_stateid *new,
const struct cred *cred,
bool update_barrier);
int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
struct list_head *tmp_list,
const struct pnfs_layout_range *recall_range,
u32 seq);
int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
struct list_head *tmp_list,
const struct pnfs_layout_range *recall_range,
u32 seq);
int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo,
struct list_head *lseg_list);
bool pnfs_roc(struct inode *ino,
struct nfs4_layoutreturn_args *args,
struct nfs4_layoutreturn_res *res,
const struct cred *cred);
int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp,
struct nfs4_layoutreturn_res **respp, int *ret);
void pnfs_roc_release(struct nfs4_layoutreturn_args *args,
struct nfs4_layoutreturn_res *res,
int ret);
bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task);
void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t);
void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
int pnfs_generic_sync(struct inode *inode, bool datasync);
int pnfs_nfs_generic_sync(struct inode *inode, bool datasync);
int _pnfs_return_layout(struct inode *);
int pnfs_commit_and_return_layout(struct inode *);
void pnfs_ld_write_done(struct nfs_pgio_header *);
void pnfs_ld_read_done(struct nfs_pgio_header *);
void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx);
struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
struct nfs_open_context *ctx,
loff_t pos,
u64 count,
enum pnfs_iomode iomode,
bool strict_iomode,
gfp_t gfp_flags);
void pnfs_layoutreturn_retry_later(struct pnfs_layout_hdr *lo,
const nfs4_stateid *arg_stateid,
const struct pnfs_layout_range *range);
void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo,
const nfs4_stateid *arg_stateid,
const struct pnfs_layout_range *range,
const nfs4_stateid *stateid);
void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo,
struct pnfs_layout_segment *lseg,
bool (*is_after)(const struct pnfs_layout_range *lseg_range,
const struct pnfs_layout_range *old),
bool (*do_merge)(struct pnfs_layout_segment *lseg,
struct pnfs_layout_segment *old),
struct list_head *free_me);
void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *);
int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *);
struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
void pnfs_error_mark_layout_for_return(struct inode *inode,
struct pnfs_layout_segment *lseg);
void pnfs_layout_return_unused_byclid(struct nfs_client *clp,
enum pnfs_iomode iomode);
int pnfs_layout_handle_reboot(struct nfs_client *clp);
/* nfs4_deviceid_flags */
enum {
NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */
NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */
NFS_DEVICEID_NOCACHE, /* device may not be cached */
};
/* pnfs_dev.c */
struct nfs4_deviceid_node {
struct hlist_node node;
struct hlist_node tmpnode;
const struct pnfs_layoutdriver_type *ld;
const struct nfs_client *nfs_client;
unsigned long flags;
unsigned long timestamp_unavailable;
struct nfs4_deviceid deviceid;
struct rcu_head rcu;
atomic_t ref;
};
struct nfs4_deviceid_node *
nfs4_find_get_deviceid(struct nfs_server *server,
const struct nfs4_deviceid *id, const struct cred *cred,
gfp_t gfp_mask);
void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *,
const struct nfs4_deviceid *);
bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node);
void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
void nfs4_deviceid_purge_client(const struct nfs_client *);
/* pnfs_nfs.c */
struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags);
void pnfs_free_commit_array(struct pnfs_commit_array *p);
struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *,
struct pnfs_commit_array *,
struct pnfs_layout_segment *);
void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo,
struct pnfs_layout_segment *lseg);
void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo);
void pnfs_generic_clear_request_commit(struct nfs_page *req,
struct nfs_commit_info *cinfo);
void pnfs_generic_commit_release(void *calldata);
void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data);
void pnfs_generic_rw_release(void *data);
void pnfs_generic_recover_commit_reqs(struct list_head *dst,
struct nfs_commit_info *cinfo);
int pnfs_generic_commit_pagelist(struct inode *inode,
struct list_head *mds_pages,
int how,
struct nfs_commit_info *cinfo,
int (*initiate_commit)(struct nfs_commit_data *data,
int how));
int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max);
void pnfs_generic_write_commit_done(struct rpc_task *task, void *data);
void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds);
struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs,
gfp_t gfp_flags);
void nfs4_pnfs_v3_ds_connect_unload(void);
int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
struct nfs4_deviceid_node *devid, unsigned int timeo,
unsigned int retrans, u32 version, u32 minor_version);
struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
struct xdr_stream *xdr,
gfp_t gfp_flags);
void pnfs_layout_mark_request_commit(struct nfs_page *req,
struct pnfs_layout_segment *lseg,
struct nfs_commit_info *cinfo,
u32 ds_commit_idx);
void pnfs_lgopen_prepare(struct nfs4_opendata *data,
struct nfs_open_context *ctx);
void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp,
struct nfs_open_context *ctx);
void nfs4_lgopen_release(struct nfs4_layoutget *lgp);
static inline bool nfs_have_layout(struct inode *inode)
{
return NFS_I(inode)->layout != NULL;
}
static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
{
return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0;
}
static inline struct nfs4_deviceid_node *
nfs4_get_deviceid(struct nfs4_deviceid_node *d)
{
atomic_inc(&d->ref);
return d;
}
static inline struct pnfs_layout_segment *
pnfs_get_lseg(struct pnfs_layout_segment *lseg)
{
if (lseg) {
refcount_inc(&lseg->pls_refcount);
smp_mb__after_atomic();
}
return lseg;
}
static inline bool
pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg)
{
return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0;
}
/* Return true if a layout driver is being used for this mountpoint */
static inline int pnfs_enabled_sb(struct nfs_server *nfss)
{
return nfss->pnfs_curr_ld != NULL;
}
static inline int
pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
struct nfs_commit_info *cinfo)
{
struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0)
return PNFS_NOT_ATTEMPTED;
return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo);
}
static inline struct pnfs_ds_commit_info *
pnfs_get_ds_info(struct inode *inode)
{
struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
if (ld == NULL || ld->get_ds_info == NULL)
return NULL;
return ld->get_ds_info(inode);
}
static inline void
pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
{
struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode);
if (inode_cinfo != NULL)
fl_cinfo->ops = inode_cinfo->ops;
}
static inline void
pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo)
{
INIT_LIST_HEAD(&fl_cinfo->commits);
fl_cinfo->ops = NULL;
}
static inline void
pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
{
if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL)
fl_cinfo->ops->release_ds_info(fl_cinfo, inode);
}
static inline void
pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node)
{
set_bit(NFS_DEVICEID_INVALID, &node->flags);
}
static inline bool
pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
struct nfs_commit_info *cinfo, u32 ds_commit_idx)
{
struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
if (!lseg || !fl_cinfo->ops || !fl_cinfo->ops->mark_request_commit)
return false;
fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx);
return true;
}
static inline bool
pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
{
struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit)
return false;
fl_cinfo->ops->clear_request_commit(req, cinfo);
return true;
}
static inline int
pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
int max)
{
struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
if (!fl_cinfo || fl_cinfo->nwritten == 0)
return 0;
return fl_cinfo->ops->scan_commit_lists(cinfo, max);
}
static inline void
pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo)
{
struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
if (fl_cinfo && fl_cinfo->nwritten != 0)
fl_cinfo->ops->recover_commit_reqs(head, cinfo);
}
/* Should the pNFS client commit and return the layout upon a setattr */
static inline bool
pnfs_ld_layoutret_on_setattr(struct inode *inode)
{
if (!pnfs_enabled_sb(NFS_SERVER(inode)))
return false;
return NFS_SERVER(inode)->pnfs_curr_ld->flags &
PNFS_LAYOUTRET_ON_SETATTR;
}
static inline bool
pnfs_ld_read_whole_page(struct inode *inode)
{
if (!pnfs_enabled_sb(NFS_SERVER(inode)))
return false;
return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE;
}
static inline int
pnfs_sync_inode(struct inode *inode, bool datasync)
{
if (!pnfs_enabled_sb(NFS_SERVER(inode)))
return 0;
return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync);
}
static inline bool
pnfs_layoutcommit_outstanding(struct inode *inode)
{
struct nfs_inode *nfsi = NFS_I(inode);
return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 ||
test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0;
}
static inline int pnfs_return_layout(struct inode *ino)
{
struct nfs_inode *nfsi = NFS_I(ino);
struct nfs_server *nfss = NFS_SERVER(ino);
if (pnfs_enabled_sb(nfss) && nfsi->layout) {
set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags);
return _pnfs_return_layout(ino);
}
return 0;
}
static inline bool
pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
struct nfs_server *nfss)
{
return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld &&
nfss->pnfs_curr_ld->id == src->l_type);
}
static inline u64
pnfs_calc_offset_end(u64 offset, u64 len)
{
if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset)
return NFS4_MAX_UINT64;
return offset + len - 1;
}
static inline u64
pnfs_calc_offset_length(u64 offset, u64 end)
{
if (end == NFS4_MAX_UINT64 || end <= offset)
return NFS4_MAX_UINT64;
return 1 + end - offset;
}
static inline void
pnfs_copy_range(struct pnfs_layout_range *dst,
const struct pnfs_layout_range *src)
{
memcpy(dst, src, sizeof(*dst));
}
static inline u64
pnfs_end_offset(u64 start, u64 len)
{
if (NFS4_MAX_UINT64 - start <= len)
return NFS4_MAX_UINT64;
return start + len;
}
/*
* Are 2 ranges intersecting?
* start1 end1
* [----------------------------------)
* start2 end2
* [----------------)
*/
static inline bool
pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2)
{
return (end1 == NFS4_MAX_UINT64 || start2 < end1) &&
(end2 == NFS4_MAX_UINT64 || start1 < end2);
}
static inline bool
pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1,
const struct pnfs_layout_range *l2)
{
u64 end1 = pnfs_end_offset(l1->offset, l1->length);
u64 end2 = pnfs_end_offset(l2->offset, l2->length);
return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2);
}
static inline bool
pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req)
{
u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length);
u64 req_last = req_offset(req) + req->wb_bytes;
return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last,
req_offset(req), req_last);
}
static inline void pnfs_lseg_cancel_io(struct nfs_server *server,
struct pnfs_layout_segment *lseg)
{
if (server->pnfs_curr_ld->cancel_io)
server->pnfs_curr_ld->cancel_io(lseg);
}
extern unsigned int layoutstats_timer;
#ifdef NFS_DEBUG
void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
#else
static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id)
{
}
#endif /* NFS_DEBUG */
#else /* CONFIG_NFS_V4_1 */
static inline bool nfs_have_layout(struct inode *inode)
{
return false;
}
static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
{
}
static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
{
}
static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi)
{
}
static inline int pnfs_layout_handle_reboot(struct nfs_client *clp)
{
return 0;
}
static inline struct pnfs_layout_segment *
pnfs_get_lseg(struct pnfs_layout_segment *lseg)
{
return NULL;
}
static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
{
}
static inline int pnfs_return_layout(struct inode *ino)
{
return 0;
}
static inline int pnfs_commit_and_return_layout(struct inode *inode)
{
return 0;
}
static inline bool
pnfs_ld_layoutret_on_setattr(struct inode *inode)
{
return false;
}
static inline bool
pnfs_ld_read_whole_page(struct inode *inode)
{
return false;
}
static inline int
pnfs_sync_inode(struct inode *inode, bool datasync)
{
return 0;
}
static inline bool
pnfs_layoutcommit_outstanding(struct inode *inode)
{
return false;
}
static inline bool
pnfs_roc(struct inode *ino,
struct nfs4_layoutreturn_args *args,
struct nfs4_layoutreturn_res *res,
const struct cred *cred)
{
return false;
}
static inline int
pnfs_roc_done(struct rpc_task *task,
struct nfs4_layoutreturn_args **argpp,
struct nfs4_layoutreturn_res **respp,
int *ret)
{
return 0;
}
static inline void
pnfs_roc_release(struct nfs4_layoutreturn_args *args,
struct nfs4_layoutreturn_res *res,
int ret)
{
}
static inline bool
pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task)
{
return false;
}
static inline void set_pnfs_layoutdriver(struct nfs_server *s,
const struct nfs_fh *mntfh,
struct nfs_fsinfo *fsinfo)
{
}
static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
{
}
static inline int
pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
struct nfs_commit_info *cinfo)
{
return PNFS_NOT_ATTEMPTED;
}
static inline struct pnfs_ds_commit_info *
pnfs_get_ds_info(struct inode *inode)
{
return NULL;
}
static inline void
pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
{
}
static inline void
pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo)
{
}
static inline void
pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
{
}
static inline bool
pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
struct nfs_commit_info *cinfo, u32 ds_commit_idx)
{
return false;
}
static inline bool
pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
{
return false;
}
static inline int
pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
int max)
{
return 0;
}
static inline void
pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo)
{
}
static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
{
return 0;
}
static inline bool
pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
struct nfs_server *nfss)
{
return false;
}
static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
{
return NULL;
}
static inline void nfs4_pnfs_v3_ds_connect_unload(void)
{
}
static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst,
struct pnfs_layout_range *dst_range,
struct inode *inode)
{
return false;
}
static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data,
struct nfs_open_context *ctx)
{
}
static inline void pnfs_parse_lgopen(struct inode *ino,
struct nfs4_layoutget *lgp,
struct nfs_open_context *ctx)
{
}
static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp)
{
}
static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
{
return false;
}
#endif /* CONFIG_NFS_V4_1 */
#if IS_ENABLED(CONFIG_NFS_V4_2)
int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags);
#else
static inline int
pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags)
{
return 0;
}
#endif
#endif /* FS_NFS_PNFS_H */
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