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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 unsigned long pls_flags;
68 struct pnfs_layout_hdr *pls_layout;
69 struct work_struct pls_work;
70};
71
72enum pnfs_try_status {
73 PNFS_ATTEMPTED = 0,
74 PNFS_NOT_ATTEMPTED = 1,
75 PNFS_TRY_AGAIN = 2,
76};
77
78#ifdef CONFIG_NFS_V4_1
79
80#define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
81
82
83
84
85
86#define NFS4_DEF_DS_TIMEO 600
87#define NFS4_DEF_DS_RETRANS 5
88
89
90#define NFS4ERR_RESET_TO_MDS 12001
91#define NFS4ERR_RESET_TO_PNFS 12002
92
93enum {
94 NFS_LAYOUT_RO_FAILED = 0,
95 NFS_LAYOUT_RW_FAILED,
96 NFS_LAYOUT_BULK_RECALL,
97 NFS_LAYOUT_ROC,
98 NFS_LAYOUT_RETURN,
99 NFS_LAYOUT_RETURN_BEFORE_CLOSE,
100 NFS_LAYOUT_INVALID_STID,
101 NFS_LAYOUT_FIRST_LAYOUTGET,
102 NFS_LAYOUT_RETRY_LAYOUTGET,
103};
104
105enum layoutdriver_policy_flags {
106
107
108 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
109 PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
110 PNFS_READ_WHOLE_PAGE = 1 << 2,
111};
112
113struct nfs4_deviceid_node;
114
115
116struct pnfs_layoutdriver_type {
117 struct list_head pnfs_tblid;
118 const u32 id;
119 const char *name;
120 struct module *owner;
121 unsigned flags;
122 unsigned max_deviceinfo_size;
123
124 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
125 int (*clear_layoutdriver) (struct nfs_server *);
126
127 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
128 void (*free_layout_hdr) (struct pnfs_layout_hdr *);
129
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
133 void (*return_range) (struct pnfs_layout_hdr *lo,
134 struct pnfs_layout_range *range);
135
136
137 const struct nfs_pageio_ops *pg_read_ops;
138 const struct nfs_pageio_ops *pg_write_ops;
139
140 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode);
141 void (*mark_request_commit) (struct nfs_page *req,
142 struct pnfs_layout_segment *lseg,
143 struct nfs_commit_info *cinfo,
144 u32 ds_commit_idx);
145 void (*clear_request_commit) (struct nfs_page *req,
146 struct nfs_commit_info *cinfo);
147 int (*scan_commit_lists) (struct nfs_commit_info *cinfo,
148 int max);
149 void (*recover_commit_reqs) (struct list_head *list,
150 struct nfs_commit_info *cinfo);
151 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo,
152 struct page *page);
153 int (*commit_pagelist)(struct inode *inode,
154 struct list_head *mds_pages,
155 int how,
156 struct nfs_commit_info *cinfo);
157
158 int (*sync)(struct inode *inode, bool datasync);
159
160
161
162
163
164 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *);
165 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int);
166
167 void (*free_deviceid_node) (struct nfs4_deviceid_node *);
168 struct nfs4_deviceid_node * (*alloc_deviceid_node)
169 (struct nfs_server *server, struct pnfs_device *pdev,
170 gfp_t gfp_flags);
171
172 void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid,
173 struct xdr_stream *xdr,
174 const struct nfs4_layoutreturn_args *args);
175
176 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data);
177 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args);
178 void (*encode_layoutcommit) (struct pnfs_layout_hdr *lo,
179 struct xdr_stream *xdr,
180 const struct nfs4_layoutcommit_args *args);
181};
182
183struct pnfs_layout_hdr {
184 atomic_t plh_refcount;
185 struct list_head plh_layouts;
186 struct list_head plh_bulk_destroy;
187 struct list_head plh_segs;
188 nfs4_stateid plh_stateid;
189 atomic_t plh_outstanding;
190 unsigned long plh_block_lgets;
191 u32 plh_barrier;
192 unsigned long plh_retry_timestamp;
193 unsigned long plh_flags;
194 enum pnfs_iomode plh_return_iomode;
195 loff_t plh_lwb;
196 struct rpc_cred *plh_lc_cred;
197 struct inode *plh_inode;
198};
199
200struct pnfs_device {
201 struct nfs4_deviceid dev_id;
202 unsigned int layout_type;
203 unsigned int mincount;
204 unsigned int maxcount;
205 struct page **pages;
206 unsigned int pgbase;
207 unsigned int pglen;
208 unsigned char nocache : 1;
209};
210
211#define NFS4_PNFS_GETDEVLIST_MAXNUM 16
212
213struct pnfs_devicelist {
214 unsigned int eof;
215 unsigned int num_devs;
216 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
217};
218
219extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
220extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
221
222
223extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
224 struct pnfs_device *dev,
225 struct rpc_cred *cred);
226extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags);
227extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync);
228
229
230void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
231void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
232void pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg);
233
234void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32);
235void unset_pnfs_layoutdriver(struct nfs_server *);
236void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
237int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
238void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
239 struct nfs_page *req, u64 wb_size);
240void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *);
241int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
242size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
243 struct nfs_page *prev, struct nfs_page *req);
244void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
245struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
246void pnfs_free_lseg_list(struct list_head *tmp_list);
247void pnfs_destroy_layout(struct nfs_inode *);
248void pnfs_destroy_all_layouts(struct nfs_client *);
249int pnfs_destroy_layouts_byfsid(struct nfs_client *clp,
250 struct nfs_fsid *fsid,
251 bool is_recall);
252int pnfs_destroy_layouts_byclid(struct nfs_client *clp,
253 bool is_recall);
254void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo);
255void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
256 const nfs4_stateid *new,
257 bool update_barrier);
258int pnfs_choose_layoutget_stateid(nfs4_stateid *dst,
259 struct pnfs_layout_hdr *lo,
260 struct pnfs_layout_range *range,
261 struct nfs4_state *open_state);
262int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
263 struct list_head *tmp_list,
264 struct pnfs_layout_range *recall_range);
265bool pnfs_roc(struct inode *ino);
266void pnfs_roc_release(struct inode *ino);
267void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);
268bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task);
269void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t);
270void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
271int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
272int pnfs_generic_sync(struct inode *inode, bool datasync);
273int pnfs_nfs_generic_sync(struct inode *inode, bool datasync);
274int _pnfs_return_layout(struct inode *);
275int pnfs_commit_and_return_layout(struct inode *);
276void pnfs_ld_write_done(struct nfs_pgio_header *);
277void pnfs_ld_read_done(struct nfs_pgio_header *);
278int pnfs_read_resend_pnfs(struct nfs_pgio_header *);
279struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
280 struct nfs_open_context *ctx,
281 loff_t pos,
282 u64 count,
283 enum pnfs_iomode iomode,
284 gfp_t gfp_flags);
285void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo);
286
287void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
288int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *);
289int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *);
290struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
291void pnfs_error_mark_layout_for_return(struct inode *inode,
292 struct pnfs_layout_segment *lseg);
293
294
295enum {
296 NFS_DEVICEID_INVALID = 0,
297 NFS_DEVICEID_UNAVAILABLE,
298 NFS_DEVICEID_NOCACHE,
299};
300
301
302struct nfs4_deviceid_node {
303 struct hlist_node node;
304 struct hlist_node tmpnode;
305 const struct pnfs_layoutdriver_type *ld;
306 const struct nfs_client *nfs_client;
307 unsigned long flags;
308 unsigned long timestamp_unavailable;
309 struct nfs4_deviceid deviceid;
310 struct rcu_head rcu;
311 atomic_t ref;
312};
313
314struct nfs4_deviceid_node *
315nfs4_find_get_deviceid(struct nfs_server *server,
316 const struct nfs4_deviceid *id, struct rpc_cred *cred,
317 gfp_t gfp_mask);
318void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
319void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *,
320 const struct nfs4_deviceid *);
321bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
322void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
323bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
324void nfs4_deviceid_purge_client(const struct nfs_client *);
325
326
327void pnfs_generic_clear_request_commit(struct nfs_page *req,
328 struct nfs_commit_info *cinfo);
329void pnfs_generic_commit_release(void *calldata);
330void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data);
331void pnfs_generic_rw_release(void *data);
332void pnfs_generic_recover_commit_reqs(struct list_head *dst,
333 struct nfs_commit_info *cinfo);
334int pnfs_generic_commit_pagelist(struct inode *inode,
335 struct list_head *mds_pages,
336 int how,
337 struct nfs_commit_info *cinfo,
338 int (*initiate_commit)(struct nfs_commit_data *data,
339 int how));
340int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max);
341void pnfs_generic_write_commit_done(struct rpc_task *task, void *data);
342void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds);
343struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs,
344 gfp_t gfp_flags);
345void nfs4_pnfs_v3_ds_connect_unload(void);
346void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
347 struct nfs4_deviceid_node *devid, unsigned int timeo,
348 unsigned int retrans, u32 version, u32 minor_version,
349 rpc_authflavor_t au_flavor);
350struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
351 struct xdr_stream *xdr,
352 gfp_t gfp_flags);
353void pnfs_layout_mark_request_commit(struct nfs_page *req,
354 struct pnfs_layout_segment *lseg,
355 struct nfs_commit_info *cinfo,
356 u32 ds_commit_idx);
357
358static inline bool nfs_have_layout(struct inode *inode)
359{
360 return NFS_I(inode)->layout != NULL;
361}
362
363static inline struct nfs4_deviceid_node *
364nfs4_get_deviceid(struct nfs4_deviceid_node *d)
365{
366 atomic_inc(&d->ref);
367 return d;
368}
369
370static inline void pnfs_set_retry_layoutget(struct pnfs_layout_hdr *lo)
371{
372 if (!test_and_set_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags))
373 atomic_inc(&lo->plh_refcount);
374}
375
376static inline void pnfs_clear_retry_layoutget(struct pnfs_layout_hdr *lo)
377{
378 if (test_and_clear_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) {
379 atomic_dec(&lo->plh_refcount);
380
381 wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN);
382 }
383}
384
385static inline bool pnfs_should_retry_layoutget(struct pnfs_layout_hdr *lo)
386{
387 return test_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags);
388}
389
390static inline struct pnfs_layout_segment *
391pnfs_get_lseg(struct pnfs_layout_segment *lseg)
392{
393 if (lseg) {
394 atomic_inc(&lseg->pls_refcount);
395 smp_mb__after_atomic();
396 }
397 return lseg;
398}
399
400
401static inline int pnfs_enabled_sb(struct nfs_server *nfss)
402{
403 return nfss->pnfs_curr_ld != NULL;
404}
405
406static inline int
407pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
408 struct nfs_commit_info *cinfo)
409{
410 if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0)
411 return PNFS_NOT_ATTEMPTED;
412 return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo);
413}
414
415static inline struct pnfs_ds_commit_info *
416pnfs_get_ds_info(struct inode *inode)
417{
418 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
419
420 if (ld == NULL || ld->get_ds_info == NULL)
421 return NULL;
422 return ld->get_ds_info(inode);
423}
424
425static inline void
426pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node)
427{
428 set_bit(NFS_DEVICEID_INVALID, &node->flags);
429}
430
431static inline bool
432pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
433 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
434{
435 struct inode *inode = d_inode(req->wb_context->dentry);
436 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
437
438 if (lseg == NULL || ld->mark_request_commit == NULL)
439 return false;
440 ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx);
441 return true;
442}
443
444static inline bool
445pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
446{
447 struct inode *inode = d_inode(req->wb_context->dentry);
448 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
449
450 if (ld == NULL || ld->clear_request_commit == NULL)
451 return false;
452 ld->clear_request_commit(req, cinfo);
453 return true;
454}
455
456static inline int
457pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
458 int max)
459{
460 if (cinfo->ds == NULL || cinfo->ds->nwritten == 0)
461 return 0;
462 else
463 return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max);
464}
465
466static inline struct nfs_page *
467pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
468 struct page *page)
469{
470 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
471
472 if (ld == NULL || ld->search_commit_reqs == NULL)
473 return NULL;
474 return ld->search_commit_reqs(cinfo, page);
475}
476
477
478static inline bool
479pnfs_ld_layoutret_on_setattr(struct inode *inode)
480{
481 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
482 return false;
483 return NFS_SERVER(inode)->pnfs_curr_ld->flags &
484 PNFS_LAYOUTRET_ON_SETATTR;
485}
486
487static inline bool
488pnfs_ld_read_whole_page(struct inode *inode)
489{
490 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
491 return false;
492 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE;
493}
494
495static inline int
496pnfs_sync_inode(struct inode *inode, bool datasync)
497{
498 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
499 return 0;
500 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync);
501}
502
503static inline bool
504pnfs_layoutcommit_outstanding(struct inode *inode)
505{
506 struct nfs_inode *nfsi = NFS_I(inode);
507
508 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 ||
509 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0;
510}
511
512static inline int pnfs_return_layout(struct inode *ino)
513{
514 struct nfs_inode *nfsi = NFS_I(ino);
515 struct nfs_server *nfss = NFS_SERVER(ino);
516
517 if (pnfs_enabled_sb(nfss) && nfsi->layout)
518 return _pnfs_return_layout(ino);
519
520 return 0;
521}
522
523static inline bool
524pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
525 struct nfs_server *nfss)
526{
527 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld &&
528 nfss->pnfs_curr_ld->id == src->l_type);
529}
530
531#ifdef NFS_DEBUG
532void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
533#else
534static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id)
535{
536}
537#endif
538#else
539
540static inline bool nfs_have_layout(struct inode *inode)
541{
542 return false;
543}
544
545static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
546{
547}
548
549static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
550{
551}
552
553static inline struct pnfs_layout_segment *
554pnfs_get_lseg(struct pnfs_layout_segment *lseg)
555{
556 return NULL;
557}
558
559static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
560{
561}
562
563static inline int pnfs_return_layout(struct inode *ino)
564{
565 return 0;
566}
567
568static inline int pnfs_commit_and_return_layout(struct inode *inode)
569{
570 return 0;
571}
572
573static inline bool
574pnfs_ld_layoutret_on_setattr(struct inode *inode)
575{
576 return false;
577}
578
579static inline bool
580pnfs_ld_read_whole_page(struct inode *inode)
581{
582 return false;
583}
584
585static inline int
586pnfs_sync_inode(struct inode *inode, bool datasync)
587{
588 return 0;
589}
590
591static inline bool
592pnfs_roc(struct inode *ino)
593{
594 return false;
595}
596
597static inline void
598pnfs_roc_release(struct inode *ino)
599{
600}
601
602static inline void
603pnfs_roc_set_barrier(struct inode *ino, u32 barrier)
604{
605}
606
607static inline bool
608pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task)
609{
610 return false;
611}
612
613static inline void set_pnfs_layoutdriver(struct nfs_server *s,
614 const struct nfs_fh *mntfh, u32 id)
615{
616}
617
618static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
619{
620}
621
622static inline int
623pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
624 struct nfs_commit_info *cinfo)
625{
626 return PNFS_NOT_ATTEMPTED;
627}
628
629static inline struct pnfs_ds_commit_info *
630pnfs_get_ds_info(struct inode *inode)
631{
632 return NULL;
633}
634
635static inline bool
636pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
637 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
638{
639 return false;
640}
641
642static inline bool
643pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
644{
645 return false;
646}
647
648static inline int
649pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
650 int max)
651{
652 return 0;
653}
654
655static inline struct nfs_page *
656pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
657 struct page *page)
658{
659 return NULL;
660}
661
662static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
663{
664 return 0;
665}
666
667static inline bool
668pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
669 struct nfs_server *nfss)
670{
671 return false;
672}
673
674static inline bool
675pnfs_layoutcommit_outstanding(struct inode *inode)
676{
677 return false;
678}
679
680
681static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
682{
683 return NULL;
684}
685
686static inline void nfs4_pnfs_v3_ds_connect_unload(void)
687{
688}
689
690#endif
691
692#endif
693