2 * pNFS client data structures.
5 * The Regents of the University of Michigan
8 * Dean Hildebrand <dhildebz@umich.edu>
10 * Permission is granted to use, copy, create derivative works, and
11 * redistribute this software and such derivative works for any purpose,
12 * so long as the name of the University of Michigan is not used in
13 * any advertising or publicity pertaining to the use or distribution
14 * of this software without specific, written prior authorization. If
15 * the above copyright notice or any other identification of the
16 * University of Michigan is included in any copy of any portion of
17 * this software, then the disclaimer below must also be included.
19 * This software is provided as is, without representation or warranty
20 * of any kind either express or implied, including without limitation
21 * the implied warranties of merchantability, fitness for a particular
22 * purpose, or noninfringement. The Regents of the University of
23 * Michigan shall not be liable for any damages, including special,
24 * indirect, incidental, or consequential damages, with respect to any
25 * claim arising out of or in connection with the use of the software,
26 * even if it has been or is hereafter advised of the possibility of
33 #include <linux/nfs_fs.h>
34 #include <linux/nfs_page.h>
35 #include <linux/workqueue.h>
38 NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */
39 NFS_LSEG_ROC, /* roc bit received from server */
40 NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */
41 NFS_LSEG_LAYOUTRETURN, /* layoutreturn bit set for layoutreturn */
44 /* Individual ip address */
45 struct nfs4_pnfs_ds_addr {
46 struct sockaddr_storage da_addr;
48 struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */
49 char *da_remotestr; /* human readable addr+port */
53 struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */
54 char *ds_remotestr; /* comma sep list of addrs */
55 struct list_head ds_addrs;
56 struct nfs_client *ds_clp;
58 unsigned long ds_state;
59 #define NFS4DS_CONNECTING 0 /* ds is establishing connection */
62 struct pnfs_layout_segment {
63 struct list_head pls_list;
64 struct list_head pls_lc_list;
65 struct pnfs_layout_range pls_range;
66 atomic_t pls_refcount;
68 unsigned long pls_flags;
69 struct pnfs_layout_hdr *pls_layout;
72 enum pnfs_try_status {
74 PNFS_NOT_ATTEMPTED = 1,
78 #ifdef CONFIG_NFS_V4_1
80 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
83 * Default data server connection timeout and retrans vaules.
84 * Set by module parameters dataserver_timeo and dataserver_retrans.
86 #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */
87 #define NFS4_DEF_DS_RETRANS 5
89 /* error codes for internal use */
90 #define NFS4ERR_RESET_TO_MDS 12001
91 #define NFS4ERR_RESET_TO_PNFS 12002
94 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
95 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
96 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
97 NFS_LAYOUT_RETURN, /* layoutreturn in progress */
98 NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */
99 NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */
100 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */
101 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */
102 NFS_LAYOUT_INODE_FREEING, /* The inode is being freed */
105 enum layoutdriver_policy_flags {
106 /* Should the pNFS client commit and return the layout upon truncate to
108 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
109 PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
110 PNFS_READ_WHOLE_PAGE = 1 << 2,
113 struct nfs4_deviceid_node;
115 /* Per-layout driver specific registration structure */
116 struct pnfs_layoutdriver_type {
117 struct list_head pnfs_tblid;
120 struct module *owner;
122 unsigned max_deviceinfo_size;
124 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
125 int (*clear_layoutdriver) (struct nfs_server *);
127 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
128 void (*free_layout_hdr) (struct pnfs_layout_hdr *);
130 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
131 void (*free_lseg) (struct pnfs_layout_segment *lseg);
132 void (*add_lseg) (struct pnfs_layout_hdr *layoutid,
133 struct pnfs_layout_segment *lseg,
134 struct list_head *free_me);
136 void (*return_range) (struct pnfs_layout_hdr *lo,
137 struct pnfs_layout_range *range);
139 /* test for nfs page cache coalescing */
140 const struct nfs_pageio_ops *pg_read_ops;
141 const struct nfs_pageio_ops *pg_write_ops;
143 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode);
144 void (*mark_request_commit) (struct nfs_page *req,
145 struct pnfs_layout_segment *lseg,
146 struct nfs_commit_info *cinfo,
148 void (*clear_request_commit) (struct nfs_page *req,
149 struct nfs_commit_info *cinfo);
150 int (*scan_commit_lists) (struct nfs_commit_info *cinfo,
152 void (*recover_commit_reqs) (struct list_head *list,
153 struct nfs_commit_info *cinfo);
154 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo,
156 int (*commit_pagelist)(struct inode *inode,
157 struct list_head *mds_pages,
159 struct nfs_commit_info *cinfo);
161 int (*sync)(struct inode *inode, bool datasync);
164 * Return PNFS_ATTEMPTED to indicate the layout code has attempted
165 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS
167 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *);
168 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int);
170 void (*free_deviceid_node) (struct nfs4_deviceid_node *);
171 struct nfs4_deviceid_node * (*alloc_deviceid_node)
172 (struct nfs_server *server, struct pnfs_device *pdev,
175 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *);
177 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data);
178 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args);
179 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args);
182 struct pnfs_layout_hdr {
183 atomic_t plh_refcount;
184 atomic_t plh_outstanding; /* number of RPCs out */
185 struct list_head plh_layouts; /* other client layouts */
186 struct list_head plh_bulk_destroy;
187 struct list_head plh_segs; /* layout segments list */
188 struct list_head plh_return_segs; /* invalid layout segments */
189 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */
190 unsigned long plh_retry_timestamp;
191 unsigned long plh_flags;
192 nfs4_stateid plh_stateid;
193 u32 plh_barrier; /* ignore lower seqids */
195 enum pnfs_iomode plh_return_iomode;
196 loff_t plh_lwb; /* last write byte for layoutcommit */
197 struct rpc_cred *plh_lc_cred; /* layoutcommit cred */
198 struct inode *plh_inode;
202 struct nfs4_deviceid dev_id;
203 unsigned int layout_type;
204 unsigned int mincount;
205 unsigned int maxcount; /* gdia_maxcount */
208 unsigned int pglen; /* reply buffer length */
209 unsigned char nocache : 1;/* May not be cached */
212 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16
214 struct pnfs_devicelist {
216 unsigned int num_devs;
217 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
220 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
221 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
224 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
225 struct pnfs_device *dev,
226 struct rpc_cred *cred);
227 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags);
228 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync);
231 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
232 void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
234 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *);
235 void unset_pnfs_layoutdriver(struct nfs_server *);
236 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio);
237 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
238 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
239 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
240 struct nfs_page *req, u64 wb_size);
241 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *);
242 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
243 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
244 struct nfs_page *prev, struct nfs_page *req);
245 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
246 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
247 void pnfs_free_lseg_list(struct list_head *tmp_list);
248 void pnfs_destroy_layout(struct nfs_inode *);
249 void pnfs_destroy_all_layouts(struct nfs_client *);
250 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp,
251 struct nfs_fsid *fsid,
253 int pnfs_destroy_layouts_byclid(struct nfs_client *clp,
255 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo);
256 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
257 const nfs4_stateid *new,
258 bool update_barrier);
259 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
260 struct list_head *tmp_list,
261 const struct pnfs_layout_range *recall_range,
263 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
264 struct list_head *tmp_list,
265 const struct pnfs_layout_range *recall_range,
267 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo,
268 struct list_head *lseg_list);
269 bool pnfs_roc(struct inode *ino,
270 struct nfs4_layoutreturn_args *args,
271 struct nfs4_layoutreturn_res *res,
272 const struct rpc_cred *cred);
273 void pnfs_roc_release(struct nfs4_layoutreturn_args *args,
274 struct nfs4_layoutreturn_res *res,
276 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task);
277 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t);
278 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
279 int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
280 int pnfs_generic_sync(struct inode *inode, bool datasync);
281 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync);
282 int _pnfs_return_layout(struct inode *);
283 int pnfs_commit_and_return_layout(struct inode *);
284 void pnfs_ld_write_done(struct nfs_pgio_header *);
285 void pnfs_ld_read_done(struct nfs_pgio_header *);
286 void pnfs_read_resend_pnfs(struct nfs_pgio_header *);
287 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
288 struct nfs_open_context *ctx,
291 enum pnfs_iomode iomode,
294 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo,
295 const nfs4_stateid *arg_stateid,
296 const struct pnfs_layout_range *range,
297 const nfs4_stateid *stateid);
299 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo,
300 struct pnfs_layout_segment *lseg,
301 bool (*is_after)(const struct pnfs_layout_range *lseg_range,
302 const struct pnfs_layout_range *old),
303 bool (*do_merge)(struct pnfs_layout_segment *lseg,
304 struct pnfs_layout_segment *old),
305 struct list_head *free_me);
307 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
308 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *);
309 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *);
310 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
311 void pnfs_error_mark_layout_for_return(struct inode *inode,
312 struct pnfs_layout_segment *lseg);
313 /* nfs4_deviceid_flags */
315 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */
316 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */
317 NFS_DEVICEID_NOCACHE, /* device may not be cached */
321 struct nfs4_deviceid_node {
322 struct hlist_node node;
323 struct hlist_node tmpnode;
324 const struct pnfs_layoutdriver_type *ld;
325 const struct nfs_client *nfs_client;
327 unsigned long timestamp_unavailable;
328 struct nfs4_deviceid deviceid;
333 struct nfs4_deviceid_node *
334 nfs4_find_get_deviceid(struct nfs_server *server,
335 const struct nfs4_deviceid *id, struct rpc_cred *cred,
337 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
338 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *,
339 const struct nfs4_deviceid *);
340 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
341 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
342 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
343 void nfs4_deviceid_purge_client(const struct nfs_client *);
346 void pnfs_generic_clear_request_commit(struct nfs_page *req,
347 struct nfs_commit_info *cinfo);
348 void pnfs_generic_commit_release(void *calldata);
349 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data);
350 void pnfs_generic_rw_release(void *data);
351 void pnfs_generic_recover_commit_reqs(struct list_head *dst,
352 struct nfs_commit_info *cinfo);
353 int pnfs_generic_commit_pagelist(struct inode *inode,
354 struct list_head *mds_pages,
356 struct nfs_commit_info *cinfo,
357 int (*initiate_commit)(struct nfs_commit_data *data,
359 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max);
360 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data);
361 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds);
362 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs,
364 void nfs4_pnfs_v3_ds_connect_unload(void);
365 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
366 struct nfs4_deviceid_node *devid, unsigned int timeo,
367 unsigned int retrans, u32 version, u32 minor_version);
368 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
369 struct xdr_stream *xdr,
371 void pnfs_layout_mark_request_commit(struct nfs_page *req,
372 struct pnfs_layout_segment *lseg,
373 struct nfs_commit_info *cinfo,
376 static inline bool nfs_have_layout(struct inode *inode)
378 return NFS_I(inode)->layout != NULL;
381 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
383 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0;
386 static inline struct nfs4_deviceid_node *
387 nfs4_get_deviceid(struct nfs4_deviceid_node *d)
393 static inline struct pnfs_layout_segment *
394 pnfs_get_lseg(struct pnfs_layout_segment *lseg)
397 atomic_inc(&lseg->pls_refcount);
398 smp_mb__after_atomic();
404 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg)
406 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0;
409 /* Return true if a layout driver is being used for this mountpoint */
410 static inline int pnfs_enabled_sb(struct nfs_server *nfss)
412 return nfss->pnfs_curr_ld != NULL;
416 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
417 struct nfs_commit_info *cinfo)
419 if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0)
420 return PNFS_NOT_ATTEMPTED;
421 return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo);
424 static inline struct pnfs_ds_commit_info *
425 pnfs_get_ds_info(struct inode *inode)
427 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
429 if (ld == NULL || ld->get_ds_info == NULL)
431 return ld->get_ds_info(inode);
435 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node)
437 set_bit(NFS_DEVICEID_INVALID, &node->flags);
441 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
442 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
444 struct inode *inode = d_inode(req->wb_context->dentry);
445 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
447 if (lseg == NULL || ld->mark_request_commit == NULL)
449 ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx);
454 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
456 struct inode *inode = d_inode(req->wb_context->dentry);
457 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
459 if (ld == NULL || ld->clear_request_commit == NULL)
461 ld->clear_request_commit(req, cinfo);
466 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
469 if (cinfo->ds == NULL || cinfo->ds->nwritten == 0)
472 return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max);
475 static inline struct nfs_page *
476 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
479 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
481 if (ld == NULL || ld->search_commit_reqs == NULL)
483 return ld->search_commit_reqs(cinfo, page);
486 /* Should the pNFS client commit and return the layout upon a setattr */
488 pnfs_ld_layoutret_on_setattr(struct inode *inode)
490 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
492 return NFS_SERVER(inode)->pnfs_curr_ld->flags &
493 PNFS_LAYOUTRET_ON_SETATTR;
497 pnfs_ld_read_whole_page(struct inode *inode)
499 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
501 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE;
505 pnfs_sync_inode(struct inode *inode, bool datasync)
507 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
509 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync);
513 pnfs_layoutcommit_outstanding(struct inode *inode)
515 struct nfs_inode *nfsi = NFS_I(inode);
517 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 ||
518 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0;
521 static inline int pnfs_return_layout(struct inode *ino)
523 struct nfs_inode *nfsi = NFS_I(ino);
524 struct nfs_server *nfss = NFS_SERVER(ino);
526 if (pnfs_enabled_sb(nfss) && nfsi->layout)
527 return _pnfs_return_layout(ino);
533 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
534 struct nfs_server *nfss)
536 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld &&
537 nfss->pnfs_curr_ld->id == src->l_type);
541 pnfs_calc_offset_end(u64 offset, u64 len)
543 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset)
544 return NFS4_MAX_UINT64;
545 return offset + len - 1;
549 pnfs_calc_offset_length(u64 offset, u64 end)
551 if (end == NFS4_MAX_UINT64 || end <= offset)
552 return NFS4_MAX_UINT64;
553 return 1 + end - offset;
557 pnfs_copy_range(struct pnfs_layout_range *dst,
558 const struct pnfs_layout_range *src)
560 memcpy(dst, src, sizeof(*dst));
564 pnfs_end_offset(u64 start, u64 len)
566 if (NFS4_MAX_UINT64 - start <= len)
567 return NFS4_MAX_UINT64;
572 * Are 2 ranges intersecting?
574 * [----------------------------------)
579 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2)
581 return (end1 == NFS4_MAX_UINT64 || start2 < end1) &&
582 (end2 == NFS4_MAX_UINT64 || start1 < end2);
586 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1,
587 const struct pnfs_layout_range *l2)
589 u64 end1 = pnfs_end_offset(l1->offset, l1->length);
590 u64 end2 = pnfs_end_offset(l2->offset, l2->length);
592 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2);
596 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req)
598 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length);
599 u64 req_last = req_offset(req) + req->wb_bytes;
601 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last,
602 req_offset(req), req_last);
605 extern unsigned int layoutstats_timer;
608 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
610 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id)
614 #endif /* NFS_DEBUG */
615 #else /* CONFIG_NFS_V4_1 */
617 static inline bool nfs_have_layout(struct inode *inode)
622 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
626 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
630 static inline struct pnfs_layout_segment *
631 pnfs_get_lseg(struct pnfs_layout_segment *lseg)
636 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
640 static inline int pnfs_return_layout(struct inode *ino)
645 static inline int pnfs_commit_and_return_layout(struct inode *inode)
651 pnfs_ld_layoutret_on_setattr(struct inode *inode)
657 pnfs_ld_read_whole_page(struct inode *inode)
663 pnfs_sync_inode(struct inode *inode, bool datasync)
669 pnfs_layoutcommit_outstanding(struct inode *inode)
676 pnfs_roc(struct inode *ino,
677 struct nfs4_layoutreturn_args *args,
678 struct nfs4_layoutreturn_res *res,
679 const struct rpc_cred *cred)
685 pnfs_roc_release(struct nfs4_layoutreturn_args *args,
686 struct nfs4_layoutreturn_res *res,
692 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task)
697 static inline void set_pnfs_layoutdriver(struct nfs_server *s,
698 const struct nfs_fh *mntfh,
699 struct nfs_fsinfo *fsinfo)
703 static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
708 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
709 struct nfs_commit_info *cinfo)
711 return PNFS_NOT_ATTEMPTED;
714 static inline struct pnfs_ds_commit_info *
715 pnfs_get_ds_info(struct inode *inode)
721 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
722 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
728 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
734 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
740 static inline struct nfs_page *
741 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
747 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
753 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
754 struct nfs_server *nfss)
759 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
764 static inline void nfs4_pnfs_v3_ds_connect_unload(void)
768 #endif /* CONFIG_NFS_V4_1 */
770 #if IS_ENABLED(CONFIG_NFS_V4_2)
771 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags);
774 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags)
780 #endif /* FS_NFS_PNFS_H */