1/*
2 * pNFS client data structures.
3 *
4 * Copyright (c) 2002
5 * The Regents of the University of Michigan
6 * All Rights Reserved
7 *
8 * Dean Hildebrand <dhildebz@umich.edu>
9 *
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.
18 *
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
27 * such damages.
28 */
29
30#ifndef FS_NFS_PNFS_H
31#define FS_NFS_PNFS_H
32
33#include <linux/refcount.h>
34#include <linux/nfs_fs.h>
35#include <linux/nfs_page.h>
36#include <linux/workqueue.h>
37
38struct nfs4_exception;
39struct nfs4_opendata;
40
41enum {
42 NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */
43 NFS_LSEG_ROC, /* roc bit received from server */
44 NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */
45 NFS_LSEG_LAYOUTRETURN, /* layoutreturn bit set for layoutreturn */
46 NFS_LSEG_UNAVAILABLE, /* unavailable bit set for temporary problem */
47};
48
49/* Individual ip address */
50struct nfs4_pnfs_ds_addr {
51 struct sockaddr_storage da_addr;
52 size_t da_addrlen;
53 struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */
54 char *da_remotestr; /* human readable addr+port */
55 const char *da_netid;
56 int da_transport;
57};
58
59struct nfs4_pnfs_ds {
60 struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */
61 char *ds_remotestr; /* comma sep list of addrs */
62 struct list_head ds_addrs;
63 const struct net *ds_net;
64 struct nfs_client *ds_clp;
65 refcount_t ds_count;
66 unsigned long ds_state;
67#define NFS4DS_CONNECTING 0 /* ds is establishing connection */
68};
69
70struct pnfs_layout_segment {
71 struct list_head pls_list;
72 struct list_head pls_lc_list;
73 struct list_head pls_commits;
74 struct pnfs_layout_range pls_range;
75 refcount_t pls_refcount;
76 u32 pls_seq;
77 unsigned long pls_flags;
78 struct pnfs_layout_hdr *pls_layout;
79};
80
81enum pnfs_try_status {
82 PNFS_ATTEMPTED = 0,
83 PNFS_NOT_ATTEMPTED = 1,
84 PNFS_TRY_AGAIN = 2,
85};
86
87#ifdef CONFIG_NFS_V4_1
88
89#define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
90
91/*
92 * Default data server connection timeout and retrans vaules.
93 * Set by module parameters dataserver_timeo and dataserver_retrans.
94 */
95#define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */
96#define NFS4_DEF_DS_RETRANS 5
97#define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ)
98
99enum {
100 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
101 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
102 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
103 NFS_LAYOUT_RETURN, /* layoutreturn in progress */
104 NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */
105 NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */
106 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */
107 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */
108 NFS_LAYOUT_INODE_FREEING, /* The inode is being freed */
109 NFS_LAYOUT_HASHED, /* The layout visible */
110 NFS_LAYOUT_DRAIN,
111};
112
113enum layoutdriver_policy_flags {
114 /* Should the pNFS client commit and return the layout upon truncate to
115 * a smaller size */
116 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
117 PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
118 PNFS_READ_WHOLE_PAGE = 1 << 2,
119 PNFS_LAYOUTGET_ON_OPEN = 1 << 3,
120};
121
122enum pnfs_layout_destroy_mode {
123 PNFS_LAYOUT_INVALIDATE = 0,
124 PNFS_LAYOUT_BULK_RETURN,
125 PNFS_LAYOUT_FILE_BULK_RETURN,
126};
127
128struct nfs4_deviceid_node;
129
130/* Per-layout driver specific registration structure */
131struct pnfs_layoutdriver_type {
132 struct list_head pnfs_tblid;
133 const u32 id;
134 const char *name;
135 struct module *owner;
136 unsigned flags;
137 unsigned max_layoutget_response;
138
139 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
140 int (*clear_layoutdriver) (struct nfs_server *);
141
142 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
143 void (*free_layout_hdr) (struct pnfs_layout_hdr *);
144
145 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
146 void (*free_lseg) (struct pnfs_layout_segment *lseg);
147 void (*add_lseg) (struct pnfs_layout_hdr *layoutid,
148 struct pnfs_layout_segment *lseg,
149 struct list_head *free_me);
150
151 void (*return_range) (struct pnfs_layout_hdr *lo,
152 struct pnfs_layout_range *range);
153
154 /* test for nfs page cache coalescing */
155 const struct nfs_pageio_ops *pg_read_ops;
156 const struct nfs_pageio_ops *pg_write_ops;
157
158 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode);
159
160 int (*sync)(struct inode *inode, bool datasync);
161
162 /*
163 * Return PNFS_ATTEMPTED to indicate the layout code has attempted
164 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS
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 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *);
175
176 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data);
177 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args);
178 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args);
179
180 void (*cancel_io)(struct pnfs_layout_segment *lseg);
181};
182
183struct pnfs_commit_ops {
184 void (*setup_ds_info)(struct pnfs_ds_commit_info *,
185 struct pnfs_layout_segment *);
186 void (*release_ds_info)(struct pnfs_ds_commit_info *,
187 struct inode *inode);
188 int (*commit_pagelist)(struct inode *inode,
189 struct list_head *mds_pages,
190 int how,
191 struct nfs_commit_info *cinfo);
192 void (*mark_request_commit) (struct nfs_page *req,
193 struct pnfs_layout_segment *lseg,
194 struct nfs_commit_info *cinfo,
195 u32 ds_commit_idx);
196 void (*clear_request_commit) (struct nfs_page *req,
197 struct nfs_commit_info *cinfo);
198 int (*scan_commit_lists) (struct nfs_commit_info *cinfo,
199 int max);
200 void (*recover_commit_reqs) (struct list_head *list,
201 struct nfs_commit_info *cinfo);
202};
203
204struct pnfs_layout_hdr {
205 refcount_t plh_refcount;
206 atomic_t plh_outstanding; /* number of RPCs out */
207 struct list_head plh_layouts; /* other client layouts */
208 struct list_head plh_bulk_destroy;
209 struct list_head plh_segs; /* layout segments list */
210 struct list_head plh_return_segs; /* invalid layout segments */
211 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */
212 unsigned long plh_retry_timestamp;
213 unsigned long plh_flags;
214 nfs4_stateid plh_stateid;
215 u32 plh_barrier; /* ignore lower seqids */
216 u32 plh_return_seq;
217 enum pnfs_iomode plh_return_iomode;
218 loff_t plh_lwb; /* last write byte for layoutcommit */
219 const struct cred *plh_lc_cred; /* layoutcommit cred */
220 struct inode *plh_inode;
221 struct rcu_head plh_rcu;
222};
223
224struct pnfs_device {
225 struct nfs4_deviceid dev_id;
226 unsigned int layout_type;
227 unsigned int mincount;
228 unsigned int maxcount; /* gdia_maxcount */
229 struct page **pages;
230 unsigned int pgbase;
231 unsigned int pglen; /* reply buffer length */
232 unsigned char nocache : 1;/* May not be cached */
233};
234
235#define NFS4_PNFS_GETDEVLIST_MAXNUM 16
236
237struct pnfs_devicelist {
238 unsigned int eof;
239 unsigned int num_devs;
240 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
241};
242
243extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
244extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
245extern const struct pnfs_layoutdriver_type *pnfs_find_layoutdriver(u32 id);
246extern void pnfs_put_layoutdriver(const struct pnfs_layoutdriver_type *ld);
247
248/* nfs4proc.c */
249#define PNFS_FL_LAYOUTRETURN_ASYNC (1U << 0)
250#define PNFS_FL_LAYOUTRETURN_PRIVILEGED (1U << 1)
251
252extern size_t max_response_pages(struct nfs_server *server);
253extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
254 struct pnfs_device *dev,
255 const struct cred *cred);
256extern struct pnfs_layout_segment *
257nfs4_proc_layoutget(struct nfs4_layoutget *lgp,
258 struct nfs4_exception *exception);
259extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp,
260 unsigned int flags);
261
262/* pnfs.c */
263void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
264void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
265
266void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *);
267void unset_pnfs_layoutdriver(struct nfs_server *);
268void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio, struct nfs_page *req);
269void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
270int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
271void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
272 struct nfs_page *req, u64 wb_size);
273void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *);
274int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
275size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
276 struct nfs_page *prev, struct nfs_page *req);
277void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
278struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
279void pnfs_layoutget_free(struct nfs4_layoutget *lgp);
280void pnfs_free_lseg_list(struct list_head *tmp_list);
281void pnfs_destroy_layout(struct nfs_inode *);
282void pnfs_destroy_layout_final(struct nfs_inode *);
283void pnfs_destroy_all_layouts(struct nfs_client *);
284int pnfs_layout_destroy_byfsid(struct nfs_client *clp, struct nfs_fsid *fsid,
285 enum pnfs_layout_destroy_mode mode);
286int pnfs_layout_destroy_byclid(struct nfs_client *clp,
287 enum pnfs_layout_destroy_mode mode);
288bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst,
289 struct pnfs_layout_range *dst_range,
290 struct inode *inode);
291void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo);
292void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
293 const nfs4_stateid *new,
294 const struct cred *cred,
295 bool update_barrier);
296int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
297 struct list_head *tmp_list,
298 const struct pnfs_layout_range *recall_range,
299 u32 seq);
300int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
301 struct list_head *tmp_list,
302 const struct pnfs_layout_range *recall_range,
303 u32 seq);
304int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo,
305 struct list_head *lseg_list);
306bool pnfs_roc(struct inode *ino,
307 struct nfs4_layoutreturn_args *args,
308 struct nfs4_layoutreturn_res *res,
309 const struct cred *cred);
310int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp,
311 struct nfs4_layoutreturn_res **respp, int *ret);
312void pnfs_roc_release(struct nfs4_layoutreturn_args *args,
313 struct nfs4_layoutreturn_res *res,
314 int ret);
315bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task);
316void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t);
317void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
318int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
319int pnfs_generic_sync(struct inode *inode, bool datasync);
320int pnfs_nfs_generic_sync(struct inode *inode, bool datasync);
321int _pnfs_return_layout(struct inode *);
322int pnfs_commit_and_return_layout(struct inode *);
323void pnfs_ld_write_done(struct nfs_pgio_header *);
324void pnfs_ld_read_done(struct nfs_pgio_header *);
325void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx);
326struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
327 struct nfs_open_context *ctx,
328 loff_t pos,
329 u64 count,
330 enum pnfs_iomode iomode,
331 bool strict_iomode,
332 gfp_t gfp_flags);
333void pnfs_layoutreturn_retry_later(struct pnfs_layout_hdr *lo,
334 const nfs4_stateid *arg_stateid,
335 const struct pnfs_layout_range *range);
336void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo,
337 const nfs4_stateid *arg_stateid,
338 const struct pnfs_layout_range *range,
339 const nfs4_stateid *stateid);
340
341void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo,
342 struct pnfs_layout_segment *lseg,
343 bool (*is_after)(const struct pnfs_layout_range *lseg_range,
344 const struct pnfs_layout_range *old),
345 bool (*do_merge)(struct pnfs_layout_segment *lseg,
346 struct pnfs_layout_segment *old),
347 struct list_head *free_me);
348
349void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
350int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *);
351int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *);
352struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
353void pnfs_error_mark_layout_for_return(struct inode *inode,
354 struct pnfs_layout_segment *lseg);
355void pnfs_layout_return_unused_byclid(struct nfs_client *clp,
356 enum pnfs_iomode iomode);
357int pnfs_layout_handle_reboot(struct nfs_client *clp);
358
359/* nfs4_deviceid_flags */
360enum {
361 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */
362 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */
363 NFS_DEVICEID_NOCACHE, /* device may not be cached */
364};
365
366/* pnfs_dev.c */
367struct nfs4_deviceid_node {
368 struct hlist_node node;
369 struct hlist_node tmpnode;
370 const struct pnfs_layoutdriver_type *ld;
371 const struct nfs_client *nfs_client;
372 unsigned long flags;
373 unsigned long timestamp_unavailable;
374 struct nfs4_deviceid deviceid;
375 struct rcu_head rcu;
376 atomic_t ref;
377};
378
379struct nfs4_deviceid_node *
380nfs4_find_get_deviceid(struct nfs_server *server,
381 const struct nfs4_deviceid *id, const struct cred *cred,
382 gfp_t gfp_mask);
383void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
384void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *,
385 const struct nfs4_deviceid *);
386bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
387void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node);
388void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
389bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
390void nfs4_deviceid_purge_client(const struct nfs_client *);
391
392/* pnfs_nfs.c */
393struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags);
394void pnfs_free_commit_array(struct pnfs_commit_array *p);
395struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *,
396 struct pnfs_commit_array *,
397 struct pnfs_layout_segment *);
398
399void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo,
400 struct pnfs_layout_segment *lseg);
401void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo);
402
403void pnfs_generic_clear_request_commit(struct nfs_page *req,
404 struct nfs_commit_info *cinfo);
405void pnfs_generic_commit_release(void *calldata);
406void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data);
407void pnfs_generic_rw_release(void *data);
408void pnfs_generic_recover_commit_reqs(struct list_head *dst,
409 struct nfs_commit_info *cinfo);
410int pnfs_generic_commit_pagelist(struct inode *inode,
411 struct list_head *mds_pages,
412 int how,
413 struct nfs_commit_info *cinfo,
414 int (*initiate_commit)(struct nfs_commit_data *data,
415 int how));
416int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max);
417void pnfs_generic_write_commit_done(struct rpc_task *task, void *data);
418void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds);
419struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(const struct net *net,
420 struct list_head *dsaddrs,
421 gfp_t gfp_flags);
422void nfs4_pnfs_v3_ds_connect_unload(void);
423int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
424 struct nfs4_deviceid_node *devid, unsigned int timeo,
425 unsigned int retrans, u32 version, u32 minor_version);
426struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
427 struct xdr_stream *xdr,
428 gfp_t gfp_flags);
429void pnfs_layout_mark_request_commit(struct nfs_page *req,
430 struct pnfs_layout_segment *lseg,
431 struct nfs_commit_info *cinfo,
432 u32 ds_commit_idx);
433void pnfs_lgopen_prepare(struct nfs4_opendata *data,
434 struct nfs_open_context *ctx);
435void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp,
436 struct nfs_open_context *ctx);
437void nfs4_lgopen_release(struct nfs4_layoutget *lgp);
438
439static inline bool nfs_have_layout(struct inode *inode)
440{
441 return NFS_I(inode)->layout != NULL;
442}
443
444static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
445{
446 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0;
447}
448
449static inline struct nfs4_deviceid_node *
450nfs4_get_deviceid(struct nfs4_deviceid_node *d)
451{
452 atomic_inc(&d->ref);
453 return d;
454}
455
456static inline struct pnfs_layout_segment *
457pnfs_get_lseg(struct pnfs_layout_segment *lseg)
458{
459 if (lseg) {
460 refcount_inc(&lseg->pls_refcount);
461 smp_mb__after_atomic();
462 }
463 return lseg;
464}
465
466static inline bool
467pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg)
468{
469 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0;
470}
471
472/* Return true if a layout driver is being used for this mountpoint */
473static inline int pnfs_enabled_sb(struct nfs_server *nfss)
474{
475 return nfss->pnfs_curr_ld != NULL;
476}
477
478static inline int
479pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
480 struct nfs_commit_info *cinfo)
481{
482 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
483
484 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0)
485 return PNFS_NOT_ATTEMPTED;
486 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo);
487}
488
489static inline struct pnfs_ds_commit_info *
490pnfs_get_ds_info(struct inode *inode)
491{
492 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
493
494 if (ld == NULL || ld->get_ds_info == NULL)
495 return NULL;
496 return ld->get_ds_info(inode);
497}
498
499static inline void
500pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
501{
502 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode);
503 if (inode_cinfo != NULL)
504 fl_cinfo->ops = inode_cinfo->ops;
505}
506
507static inline void
508pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo)
509{
510 INIT_LIST_HEAD(&fl_cinfo->commits);
511 fl_cinfo->ops = NULL;
512}
513
514static inline void
515pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
516{
517 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL)
518 fl_cinfo->ops->release_ds_info(fl_cinfo, inode);
519}
520
521static inline void
522pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node)
523{
524 set_bit(NFS_DEVICEID_INVALID, &node->flags);
525}
526
527static inline bool
528pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
529 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
530{
531 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
532
533 if (!lseg || !fl_cinfo->ops || !fl_cinfo->ops->mark_request_commit)
534 return false;
535 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx);
536 return true;
537}
538
539static inline bool
540pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
541{
542 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
543
544 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit)
545 return false;
546 fl_cinfo->ops->clear_request_commit(req, cinfo);
547 return true;
548}
549
550static inline int
551pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
552 int max)
553{
554 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
555
556 if (!fl_cinfo || fl_cinfo->nwritten == 0)
557 return 0;
558 return fl_cinfo->ops->scan_commit_lists(cinfo, max);
559}
560
561static inline void
562pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo)
563{
564 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
565
566 if (fl_cinfo && fl_cinfo->nwritten != 0)
567 fl_cinfo->ops->recover_commit_reqs(head, cinfo);
568}
569
570/* Should the pNFS client commit and return the layout upon a setattr */
571static inline bool
572pnfs_ld_layoutret_on_setattr(struct inode *inode)
573{
574 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
575 return false;
576 return NFS_SERVER(inode)->pnfs_curr_ld->flags &
577 PNFS_LAYOUTRET_ON_SETATTR;
578}
579
580static inline bool
581pnfs_ld_read_whole_page(struct inode *inode)
582{
583 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
584 return false;
585 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE;
586}
587
588static inline int
589pnfs_sync_inode(struct inode *inode, bool datasync)
590{
591 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
592 return 0;
593 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync);
594}
595
596static inline bool
597pnfs_layoutcommit_outstanding(struct inode *inode)
598{
599 struct nfs_inode *nfsi = NFS_I(inode);
600
601 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 ||
602 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0;
603}
604
605static inline int pnfs_return_layout(struct inode *ino)
606{
607 struct nfs_inode *nfsi = NFS_I(ino);
608 struct nfs_server *nfss = NFS_SERVER(ino);
609
610 if (pnfs_enabled_sb(nfss) && nfsi->layout) {
611 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags);
612 return _pnfs_return_layout(ino);
613 }
614
615 return 0;
616}
617
618static inline bool
619pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
620 struct nfs_server *nfss)
621{
622 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld &&
623 nfss->pnfs_curr_ld->id == src->l_type);
624}
625
626static inline u64
627pnfs_calc_offset_end(u64 offset, u64 len)
628{
629 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset)
630 return NFS4_MAX_UINT64;
631 return offset + len - 1;
632}
633
634static inline u64
635pnfs_calc_offset_length(u64 offset, u64 end)
636{
637 if (end == NFS4_MAX_UINT64 || end <= offset)
638 return NFS4_MAX_UINT64;
639 return 1 + end - offset;
640}
641
642static inline void
643pnfs_copy_range(struct pnfs_layout_range *dst,
644 const struct pnfs_layout_range *src)
645{
646 memcpy(dst, src, sizeof(*dst));
647}
648
649static inline u64
650pnfs_end_offset(u64 start, u64 len)
651{
652 if (NFS4_MAX_UINT64 - start <= len)
653 return NFS4_MAX_UINT64;
654 return start + len;
655}
656
657/*
658 * Are 2 ranges intersecting?
659 * start1 end1
660 * [----------------------------------)
661 * start2 end2
662 * [----------------)
663 */
664static inline bool
665pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2)
666{
667 return (end1 == NFS4_MAX_UINT64 || start2 < end1) &&
668 (end2 == NFS4_MAX_UINT64 || start1 < end2);
669}
670
671static inline bool
672pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1,
673 const struct pnfs_layout_range *l2)
674{
675 u64 end1 = pnfs_end_offset(l1->offset, l1->length);
676 u64 end2 = pnfs_end_offset(l2->offset, l2->length);
677
678 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2);
679}
680
681static inline bool
682pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req)
683{
684 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length);
685 u64 req_last = req_offset(req) + req->wb_bytes;
686
687 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last,
688 req_offset(req), req_last);
689}
690
691static inline void pnfs_lseg_cancel_io(struct nfs_server *server,
692 struct pnfs_layout_segment *lseg)
693{
694 if (server->pnfs_curr_ld->cancel_io)
695 server->pnfs_curr_ld->cancel_io(lseg);
696}
697
698extern unsigned int layoutstats_timer;
699
700#ifdef NFS_DEBUG
701void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
702#else
703static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id)
704{
705}
706
707#endif /* NFS_DEBUG */
708#else /* CONFIG_NFS_V4_1 */
709
710static inline bool nfs_have_layout(struct inode *inode)
711{
712 return false;
713}
714
715static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
716{
717}
718
719static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
720{
721}
722
723static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi)
724{
725}
726
727static inline int pnfs_layout_handle_reboot(struct nfs_client *clp)
728{
729 return 0;
730}
731
732static inline struct pnfs_layout_segment *
733pnfs_get_lseg(struct pnfs_layout_segment *lseg)
734{
735 return NULL;
736}
737
738static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
739{
740}
741
742static inline int pnfs_return_layout(struct inode *ino)
743{
744 return 0;
745}
746
747static inline int pnfs_commit_and_return_layout(struct inode *inode)
748{
749 return 0;
750}
751
752static inline bool
753pnfs_ld_layoutret_on_setattr(struct inode *inode)
754{
755 return false;
756}
757
758static inline bool
759pnfs_ld_read_whole_page(struct inode *inode)
760{
761 return false;
762}
763
764static inline int
765pnfs_sync_inode(struct inode *inode, bool datasync)
766{
767 return 0;
768}
769
770static inline bool
771pnfs_layoutcommit_outstanding(struct inode *inode)
772{
773 return false;
774}
775
776
777static inline bool
778pnfs_roc(struct inode *ino,
779 struct nfs4_layoutreturn_args *args,
780 struct nfs4_layoutreturn_res *res,
781 const struct cred *cred)
782{
783 return false;
784}
785
786static inline int
787pnfs_roc_done(struct rpc_task *task,
788 struct nfs4_layoutreturn_args **argpp,
789 struct nfs4_layoutreturn_res **respp,
790 int *ret)
791{
792 return 0;
793}
794
795static inline void
796pnfs_roc_release(struct nfs4_layoutreturn_args *args,
797 struct nfs4_layoutreturn_res *res,
798 int ret)
799{
800}
801
802static inline bool
803pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task)
804{
805 return false;
806}
807
808static inline void set_pnfs_layoutdriver(struct nfs_server *s,
809 const struct nfs_fh *mntfh,
810 struct nfs_fsinfo *fsinfo)
811{
812}
813
814static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
815{
816}
817
818static inline int
819pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
820 struct nfs_commit_info *cinfo)
821{
822 return PNFS_NOT_ATTEMPTED;
823}
824
825static inline struct pnfs_ds_commit_info *
826pnfs_get_ds_info(struct inode *inode)
827{
828 return NULL;
829}
830
831static inline void
832pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
833{
834}
835
836static inline void
837pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo)
838{
839}
840
841static inline void
842pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
843{
844}
845
846static inline bool
847pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
848 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
849{
850 return false;
851}
852
853static inline bool
854pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
855{
856 return false;
857}
858
859static inline int
860pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
861 int max)
862{
863 return 0;
864}
865
866static inline void
867pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo)
868{
869}
870
871static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
872{
873 return 0;
874}
875
876static inline bool
877pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
878 struct nfs_server *nfss)
879{
880 return false;
881}
882
883static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
884{
885 return NULL;
886}
887
888static inline void nfs4_pnfs_v3_ds_connect_unload(void)
889{
890}
891
892static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst,
893 struct pnfs_layout_range *dst_range,
894 struct inode *inode)
895{
896 return false;
897}
898
899static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data,
900 struct nfs_open_context *ctx)
901{
902}
903
904static inline void pnfs_parse_lgopen(struct inode *ino,
905 struct nfs4_layoutget *lgp,
906 struct nfs_open_context *ctx)
907{
908}
909
910static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp)
911{
912}
913
914static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
915{
916 return false;
917}
918
919#endif /* CONFIG_NFS_V4_1 */
920
921#if IS_ENABLED(CONFIG_NFS_V4_2)
922int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags);
923#else
924static inline int
925pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags)
926{
927 return 0;
928}
929#endif
930
931#endif /* FS_NFS_PNFS_H */
932