1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30#ifndef FS_NFS_PNFS_H
31#define FS_NFS_PNFS_H
32
33#include <linux/nfs_fs.h>
34#include <linux/nfs_page.h>
35#include <linux/workqueue.h>
36
37enum {
38 NFS_LSEG_VALID = 0,
39 NFS_LSEG_ROC,
40 NFS_LSEG_LAYOUTCOMMIT,
41 NFS_LSEG_LAYOUTRETURN,
42};
43
44
45struct nfs4_pnfs_ds_addr {
46 struct sockaddr_storage da_addr;
47 size_t da_addrlen;
48 struct list_head da_node;
49 char *da_remotestr;
50};
51
52struct nfs4_pnfs_ds {
53 struct list_head ds_node;
54 char *ds_remotestr;
55 struct list_head ds_addrs;
56 struct nfs_client *ds_clp;
57 atomic_t ds_count;
58 unsigned long ds_state;
59#define NFS4DS_CONNECTING 0
60};
61
62struct 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;
67 u32 pls_seq;
68 unsigned long pls_flags;
69 struct pnfs_layout_hdr *pls_layout;
70 struct work_struct pls_work;
71};
72
73enum pnfs_try_status {
74 PNFS_ATTEMPTED = 0,
75 PNFS_NOT_ATTEMPTED = 1,
76 PNFS_TRY_AGAIN = 2,
77};
78
79#ifdef CONFIG_NFS_V4_1
80
81#define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
82
83
84
85
86
87#define NFS4_DEF_DS_TIMEO 600
88#define NFS4_DEF_DS_RETRANS 5
89
90
91#define NFS4ERR_RESET_TO_MDS 12001
92#define NFS4ERR_RESET_TO_PNFS 12002
93
94enum {
95 NFS_LAYOUT_RO_FAILED = 0,
96 NFS_LAYOUT_RW_FAILED,
97 NFS_LAYOUT_BULK_RECALL,
98 NFS_LAYOUT_RETURN,
99 NFS_LAYOUT_RETURN_REQUESTED,
100 NFS_LAYOUT_INVALID_STID,
101 NFS_LAYOUT_FIRST_LAYOUTGET,
102};
103
104enum layoutdriver_policy_flags {
105
106
107 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
108 PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
109 PNFS_READ_WHOLE_PAGE = 1 << 2,
110};
111
112struct nfs4_deviceid_node;
113
114
115struct pnfs_layoutdriver_type {
116 struct list_head pnfs_tblid;
117 const u32 id;
118 const char *name;
119 struct module *owner;
120 unsigned flags;
121 unsigned max_deviceinfo_size;
122
123 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
124 int (*clear_layoutdriver) (struct nfs_server *);
125
126 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
127 void (*free_layout_hdr) (struct pnfs_layout_hdr *);
128
129 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
130 void (*free_lseg) (struct pnfs_layout_segment *lseg);
131 void (*add_lseg) (struct pnfs_layout_hdr *layoutid,
132 struct pnfs_layout_segment *lseg,
133 struct list_head *free_me);
134
135 void (*return_range) (struct pnfs_layout_hdr *lo,
136 struct pnfs_layout_range *range);
137
138
139 const struct nfs_pageio_ops *pg_read_ops;
140 const struct nfs_pageio_ops *pg_write_ops;
141
142 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode);
143 void (*mark_request_commit) (struct nfs_page *req,
144 struct pnfs_layout_segment *lseg,
145 struct nfs_commit_info *cinfo,
146 u32 ds_commit_idx);
147 void (*clear_request_commit) (struct nfs_page *req,
148 struct nfs_commit_info *cinfo);
149 int (*scan_commit_lists) (struct nfs_commit_info *cinfo,
150 int max);
151 void (*recover_commit_reqs) (struct list_head *list,
152 struct nfs_commit_info *cinfo);
153 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo,
154 struct page *page);
155 int (*commit_pagelist)(struct inode *inode,
156 struct list_head *mds_pages,
157 int how,
158 struct nfs_commit_info *cinfo);
159
160 int (*sync)(struct inode *inode, bool datasync);
161
162
163
164
165
166 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *);
167 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int);
168
169 void (*free_deviceid_node) (struct nfs4_deviceid_node *);
170 struct nfs4_deviceid_node * (*alloc_deviceid_node)
171 (struct nfs_server *server, struct pnfs_device *pdev,
172 gfp_t gfp_flags);
173
174 void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid,
175 struct xdr_stream *xdr,
176 const struct nfs4_layoutreturn_args *args);
177
178 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data);
179 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args);
180 void (*encode_layoutcommit) (struct pnfs_layout_hdr *lo,
181 struct xdr_stream *xdr,
182 const struct nfs4_layoutcommit_args *args);
183 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args);
184 void (*cleanup_layoutstats) (struct nfs42_layoutstat_data *data);
185};
186
187struct pnfs_layout_hdr {
188 atomic_t plh_refcount;
189 atomic_t plh_outstanding;
190 struct list_head plh_layouts;
191 struct list_head plh_bulk_destroy;
192 struct list_head plh_segs;
193 unsigned long plh_block_lgets;
194 unsigned long plh_retry_timestamp;
195 unsigned long plh_flags;
196 nfs4_stateid plh_stateid;
197 u32 plh_barrier;
198 u32 plh_return_seq;
199 enum pnfs_iomode plh_return_iomode;
200 loff_t plh_lwb;
201 struct rpc_cred *plh_lc_cred;
202 struct inode *plh_inode;
203};
204
205struct pnfs_device {
206 struct nfs4_deviceid dev_id;
207 unsigned int layout_type;
208 unsigned int mincount;
209 unsigned int maxcount;
210 struct page **pages;
211 unsigned int pgbase;
212 unsigned int pglen;
213 unsigned char nocache : 1;
214};
215
216#define NFS4_PNFS_GETDEVLIST_MAXNUM 16
217
218struct pnfs_devicelist {
219 unsigned int eof;
220 unsigned int num_devs;
221 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
222};
223
224extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
225extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
226
227
228extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
229 struct pnfs_device *dev,
230 struct rpc_cred *cred);
231extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags);
232extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync);
233
234
235void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
236void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
237void pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg);
238
239void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *);
240void unset_pnfs_layoutdriver(struct nfs_server *);
241void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
242int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
243void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
244 struct nfs_page *req, u64 wb_size);
245void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *);
246int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
247size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
248 struct nfs_page *prev, struct nfs_page *req);
249void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
250struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
251void pnfs_free_lseg_list(struct list_head *tmp_list);
252void pnfs_destroy_layout(struct nfs_inode *);
253void pnfs_destroy_all_layouts(struct nfs_client *);
254int pnfs_destroy_layouts_byfsid(struct nfs_client *clp,
255 struct nfs_fsid *fsid,
256 bool is_recall);
257int pnfs_destroy_layouts_byclid(struct nfs_client *clp,
258 bool is_recall);
259void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo);
260void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
261 const nfs4_stateid *new,
262 bool update_barrier);
263int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
264 struct list_head *tmp_list,
265 const struct pnfs_layout_range *recall_range,
266 u32 seq);
267int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
268 struct list_head *tmp_list,
269 const struct pnfs_layout_range *recall_range,
270 u32 seq);
271int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo,
272 struct list_head *lseg_list);
273bool pnfs_roc(struct inode *ino);
274void pnfs_roc_release(struct inode *ino);
275void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);
276void pnfs_roc_get_barrier(struct inode *ino, u32 *barrier);
277bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task);
278void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t);
279void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
280int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
281int pnfs_generic_sync(struct inode *inode, bool datasync);
282int pnfs_nfs_generic_sync(struct inode *inode, bool datasync);
283int _pnfs_return_layout(struct inode *);
284int pnfs_commit_and_return_layout(struct inode *);
285void pnfs_ld_write_done(struct nfs_pgio_header *);
286void pnfs_ld_read_done(struct nfs_pgio_header *);
287void pnfs_read_resend_pnfs(struct nfs_pgio_header *);
288struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
289 struct nfs_open_context *ctx,
290 loff_t pos,
291 u64 count,
292 enum pnfs_iomode iomode,
293 bool strict_iomode,
294 gfp_t gfp_flags);
295void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo);
296
297void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo,
298 struct pnfs_layout_segment *lseg,
299 bool (*is_after)(const struct pnfs_layout_range *lseg_range,
300 const struct pnfs_layout_range *old),
301 bool (*do_merge)(struct pnfs_layout_segment *lseg,
302 struct pnfs_layout_segment *old),
303 struct list_head *free_me);
304
305void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
306int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *);
307int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *);
308struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
309void pnfs_error_mark_layout_for_return(struct inode *inode,
310 struct pnfs_layout_segment *lseg);
311
312enum {
313 NFS_DEVICEID_INVALID = 0,
314 NFS_DEVICEID_UNAVAILABLE,
315 NFS_DEVICEID_NOCACHE,
316};
317
318
319struct nfs4_deviceid_node {
320 struct hlist_node node;
321 struct hlist_node tmpnode;
322 const struct pnfs_layoutdriver_type *ld;
323 const struct nfs_client *nfs_client;
324 unsigned long flags;
325 unsigned long timestamp_unavailable;
326 struct nfs4_deviceid deviceid;
327 struct rcu_head rcu;
328 atomic_t ref;
329};
330
331struct nfs4_deviceid_node *
332nfs4_find_get_deviceid(struct nfs_server *server,
333 const struct nfs4_deviceid *id, struct rpc_cred *cred,
334 gfp_t gfp_mask);
335void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
336void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *,
337 const struct nfs4_deviceid *);
338bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
339void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
340bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
341void nfs4_deviceid_purge_client(const struct nfs_client *);
342
343
344void pnfs_generic_clear_request_commit(struct nfs_page *req,
345 struct nfs_commit_info *cinfo);
346void pnfs_generic_commit_release(void *calldata);
347void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data);
348void pnfs_generic_rw_release(void *data);
349void pnfs_generic_recover_commit_reqs(struct list_head *dst,
350 struct nfs_commit_info *cinfo);
351int pnfs_generic_commit_pagelist(struct inode *inode,
352 struct list_head *mds_pages,
353 int how,
354 struct nfs_commit_info *cinfo,
355 int (*initiate_commit)(struct nfs_commit_data *data,
356 int how));
357int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max);
358void pnfs_generic_write_commit_done(struct rpc_task *task, void *data);
359void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds);
360struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs,
361 gfp_t gfp_flags);
362void nfs4_pnfs_v3_ds_connect_unload(void);
363void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
364 struct nfs4_deviceid_node *devid, unsigned int timeo,
365 unsigned int retrans, u32 version, u32 minor_version,
366 rpc_authflavor_t au_flavor);
367struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
368 struct xdr_stream *xdr,
369 gfp_t gfp_flags);
370void pnfs_layout_mark_request_commit(struct nfs_page *req,
371 struct pnfs_layout_segment *lseg,
372 struct nfs_commit_info *cinfo,
373 u32 ds_commit_idx);
374
375static inline bool nfs_have_layout(struct inode *inode)
376{
377 return NFS_I(inode)->layout != NULL;
378}
379
380static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
381{
382 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0;
383}
384
385static inline struct nfs4_deviceid_node *
386nfs4_get_deviceid(struct nfs4_deviceid_node *d)
387{
388 atomic_inc(&d->ref);
389 return d;
390}
391
392static inline struct pnfs_layout_segment *
393pnfs_get_lseg(struct pnfs_layout_segment *lseg)
394{
395 if (lseg) {
396 atomic_inc(&lseg->pls_refcount);
397 smp_mb__after_atomic();
398 }
399 return lseg;
400}
401
402static inline bool
403pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg)
404{
405 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0;
406}
407
408
409static inline int pnfs_enabled_sb(struct nfs_server *nfss)
410{
411 return nfss->pnfs_curr_ld != NULL;
412}
413
414static inline int
415pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
416 struct nfs_commit_info *cinfo)
417{
418 if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0)
419 return PNFS_NOT_ATTEMPTED;
420 return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo);
421}
422
423static inline struct pnfs_ds_commit_info *
424pnfs_get_ds_info(struct inode *inode)
425{
426 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
427
428 if (ld == NULL || ld->get_ds_info == NULL)
429 return NULL;
430 return ld->get_ds_info(inode);
431}
432
433static inline void
434pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node)
435{
436 set_bit(NFS_DEVICEID_INVALID, &node->flags);
437}
438
439static inline bool
440pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
441 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
442{
443 struct inode *inode = d_inode(req->wb_context->dentry);
444 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
445
446 if (lseg == NULL || ld->mark_request_commit == NULL)
447 return false;
448 ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx);
449 return true;
450}
451
452static inline bool
453pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
454{
455 struct inode *inode = d_inode(req->wb_context->dentry);
456 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
457
458 if (ld == NULL || ld->clear_request_commit == NULL)
459 return false;
460 ld->clear_request_commit(req, cinfo);
461 return true;
462}
463
464static inline int
465pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
466 int max)
467{
468 if (cinfo->ds == NULL || cinfo->ds->nwritten == 0)
469 return 0;
470 else
471 return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max);
472}
473
474static inline struct nfs_page *
475pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
476 struct page *page)
477{
478 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
479
480 if (ld == NULL || ld->search_commit_reqs == NULL)
481 return NULL;
482 return ld->search_commit_reqs(cinfo, page);
483}
484
485
486static inline bool
487pnfs_ld_layoutret_on_setattr(struct inode *inode)
488{
489 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
490 return false;
491 return NFS_SERVER(inode)->pnfs_curr_ld->flags &
492 PNFS_LAYOUTRET_ON_SETATTR;
493}
494
495static inline bool
496pnfs_ld_read_whole_page(struct inode *inode)
497{
498 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
499 return false;
500 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE;
501}
502
503static inline int
504pnfs_sync_inode(struct inode *inode, bool datasync)
505{
506 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
507 return 0;
508 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync);
509}
510
511static inline bool
512pnfs_layoutcommit_outstanding(struct inode *inode)
513{
514 struct nfs_inode *nfsi = NFS_I(inode);
515
516 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 ||
517 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0;
518}
519
520static inline int pnfs_return_layout(struct inode *ino)
521{
522 struct nfs_inode *nfsi = NFS_I(ino);
523 struct nfs_server *nfss = NFS_SERVER(ino);
524
525 if (pnfs_enabled_sb(nfss) && nfsi->layout)
526 return _pnfs_return_layout(ino);
527
528 return 0;
529}
530
531static inline bool
532pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
533 struct nfs_server *nfss)
534{
535 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld &&
536 nfss->pnfs_curr_ld->id == src->l_type);
537}
538
539static inline u64
540pnfs_calc_offset_end(u64 offset, u64 len)
541{
542 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset)
543 return NFS4_MAX_UINT64;
544 return offset + len - 1;
545}
546
547static inline u64
548pnfs_calc_offset_length(u64 offset, u64 end)
549{
550 if (end == NFS4_MAX_UINT64 || end <= offset)
551 return NFS4_MAX_UINT64;
552 return 1 + end - offset;
553}
554
555static inline void
556pnfs_copy_range(struct pnfs_layout_range *dst,
557 const struct pnfs_layout_range *src)
558{
559 memcpy(dst, src, sizeof(*dst));
560}
561
562extern unsigned int layoutstats_timer;
563
564#ifdef NFS_DEBUG
565void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
566#else
567static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id)
568{
569}
570
571#endif
572#else
573
574static inline bool nfs_have_layout(struct inode *inode)
575{
576 return false;
577}
578
579static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
580{
581}
582
583static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
584{
585}
586
587static inline struct pnfs_layout_segment *
588pnfs_get_lseg(struct pnfs_layout_segment *lseg)
589{
590 return NULL;
591}
592
593static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
594{
595}
596
597static inline int pnfs_return_layout(struct inode *ino)
598{
599 return 0;
600}
601
602static inline int pnfs_commit_and_return_layout(struct inode *inode)
603{
604 return 0;
605}
606
607static inline bool
608pnfs_ld_layoutret_on_setattr(struct inode *inode)
609{
610 return false;
611}
612
613static inline bool
614pnfs_ld_read_whole_page(struct inode *inode)
615{
616 return false;
617}
618
619static inline int
620pnfs_sync_inode(struct inode *inode, bool datasync)
621{
622 return 0;
623}
624
625static inline bool
626pnfs_layoutcommit_outstanding(struct inode *inode)
627{
628 return false;
629}
630
631
632static inline bool
633pnfs_roc(struct inode *ino)
634{
635 return false;
636}
637
638static inline void
639pnfs_roc_release(struct inode *ino)
640{
641}
642
643static inline void
644pnfs_roc_set_barrier(struct inode *ino, u32 barrier)
645{
646}
647
648static inline void
649pnfs_roc_get_barrier(struct inode *ino, u32 *barrier)
650{
651}
652
653static inline bool
654pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task)
655{
656 return false;
657}
658
659static inline void set_pnfs_layoutdriver(struct nfs_server *s,
660 const struct nfs_fh *mntfh,
661 struct nfs_fsinfo *fsinfo)
662{
663}
664
665static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
666{
667}
668
669static inline int
670pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
671 struct nfs_commit_info *cinfo)
672{
673 return PNFS_NOT_ATTEMPTED;
674}
675
676static inline struct pnfs_ds_commit_info *
677pnfs_get_ds_info(struct inode *inode)
678{
679 return NULL;
680}
681
682static inline bool
683pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
684 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
685{
686 return false;
687}
688
689static inline bool
690pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
691{
692 return false;
693}
694
695static inline int
696pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
697 int max)
698{
699 return 0;
700}
701
702static inline struct nfs_page *
703pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
704 struct page *page)
705{
706 return NULL;
707}
708
709static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
710{
711 return 0;
712}
713
714static inline bool
715pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
716 struct nfs_server *nfss)
717{
718 return false;
719}
720
721static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
722{
723 return NULL;
724}
725
726static inline void nfs4_pnfs_v3_ds_connect_unload(void)
727{
728}
729
730#endif
731
732#if IS_ENABLED(CONFIG_NFS_V4_2)
733int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags);
734#else
735static inline int
736pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags)
737{
738 return 0;
739}
740#endif
741
742#endif
743