linux/fs/nfs/pnfs.h
Trond Myklebust 6e7434abcd NFSv4/pnfs: Allow layoutget to return EAGAIN for softerr mounts
If we're using the 'softerr' mount option, we may want to allow
layoutget to return EAGAIN to allow knfsd server threads to return a
JUKEBOX/DELAY error to the client instead of busy waiting.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2023-10-22 19:47:56 -04:00

936 lines
28 KiB
C

/*
* pNFS client data structures.
*
* Copyright (c) 2002
* The Regents of the University of Michigan
* All Rights Reserved
*
* Dean Hildebrand <dhildebz@umich.edu>
*
* 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,
};
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_deviceinfo_size;
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 nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo,
struct folio *folio);
};
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 */
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, bool sync);
/* 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);
void pnfs_generic_pg_check_range(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_destroy_layouts_byfsid(struct nfs_client *clp,
struct nfs_fsid *fsid,
bool is_recall);
int pnfs_destroy_layouts_byclid(struct nfs_client *clp,
bool is_recall);
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_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);
/* 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);
struct nfs_page *pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo,
struct folio *folio);
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);
}
static inline struct nfs_page *
pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
struct folio *folio)
{
struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
if (!fl_cinfo->ops || !fl_cinfo->ops->search_commit_reqs)
return NULL;
return fl_cinfo->ops->search_commit_reqs(cinfo, folio);
}
/* 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 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 struct nfs_page *
pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
struct folio *folio)
{
return NULL;
}
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 */