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/refcount.h>
34 #include <linux/nfs_fs.h>
35 #include <linux/nfs_page.h>
36 #include <linux/workqueue.h>
41 NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */
42 NFS_LSEG_ROC, /* roc bit received from server */
43 NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */
44 NFS_LSEG_LAYOUTRETURN, /* layoutreturn bit set for layoutreturn */
45 NFS_LSEG_UNAVAILABLE, /* unavailable bit set for temporary problem */
48 /* Individual ip address */
49 struct nfs4_pnfs_ds_addr {
50 struct sockaddr_storage da_addr;
52 struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */
53 char *da_remotestr; /* human readable addr+port */
59 struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */
60 char *ds_remotestr; /* comma sep list of addrs */
61 struct list_head ds_addrs;
62 struct nfs_client *ds_clp;
64 unsigned long ds_state;
65 #define NFS4DS_CONNECTING 0 /* ds is establishing connection */
68 struct pnfs_layout_segment {
69 struct list_head pls_list;
70 struct list_head pls_lc_list;
71 struct list_head pls_commits;
72 struct pnfs_layout_range pls_range;
73 refcount_t pls_refcount;
75 unsigned long pls_flags;
76 struct pnfs_layout_hdr *pls_layout;
79 enum pnfs_try_status {
81 PNFS_NOT_ATTEMPTED = 1,
85 #ifdef CONFIG_NFS_V4_1
87 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
90 * Default data server connection timeout and retrans vaules.
91 * Set by module parameters dataserver_timeo and dataserver_retrans.
93 #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */
94 #define NFS4_DEF_DS_RETRANS 5
95 #define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ)
98 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
99 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
100 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
101 NFS_LAYOUT_RETURN, /* layoutreturn in progress */
102 NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */
103 NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */
104 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */
105 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */
106 NFS_LAYOUT_INODE_FREEING, /* The inode is being freed */
107 NFS_LAYOUT_HASHED, /* The layout visible */
111 enum layoutdriver_policy_flags {
112 /* Should the pNFS client commit and return the layout upon truncate to
114 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
115 PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
116 PNFS_READ_WHOLE_PAGE = 1 << 2,
117 PNFS_LAYOUTGET_ON_OPEN = 1 << 3,
120 struct nfs4_deviceid_node;
122 /* Per-layout driver specific registration structure */
123 struct pnfs_layoutdriver_type {
124 struct list_head pnfs_tblid;
127 struct module *owner;
129 unsigned max_deviceinfo_size;
130 unsigned max_layoutget_response;
132 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
133 int (*clear_layoutdriver) (struct nfs_server *);
135 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
136 void (*free_layout_hdr) (struct pnfs_layout_hdr *);
138 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
139 void (*free_lseg) (struct pnfs_layout_segment *lseg);
140 void (*add_lseg) (struct pnfs_layout_hdr *layoutid,
141 struct pnfs_layout_segment *lseg,
142 struct list_head *free_me);
144 void (*return_range) (struct pnfs_layout_hdr *lo,
145 struct pnfs_layout_range *range);
147 /* test for nfs page cache coalescing */
148 const struct nfs_pageio_ops *pg_read_ops;
149 const struct nfs_pageio_ops *pg_write_ops;
151 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode);
153 int (*sync)(struct inode *inode, bool datasync);
156 * Return PNFS_ATTEMPTED to indicate the layout code has attempted
157 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS
159 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *);
160 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int);
162 void (*free_deviceid_node) (struct nfs4_deviceid_node *);
163 struct nfs4_deviceid_node * (*alloc_deviceid_node)
164 (struct nfs_server *server, struct pnfs_device *pdev,
167 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *);
169 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data);
170 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args);
171 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args);
173 void (*cancel_io)(struct pnfs_layout_segment *lseg);
176 struct pnfs_commit_ops {
177 void (*setup_ds_info)(struct pnfs_ds_commit_info *,
178 struct pnfs_layout_segment *);
179 void (*release_ds_info)(struct pnfs_ds_commit_info *,
180 struct inode *inode);
181 int (*commit_pagelist)(struct inode *inode,
182 struct list_head *mds_pages,
184 struct nfs_commit_info *cinfo);
185 void (*mark_request_commit) (struct nfs_page *req,
186 struct pnfs_layout_segment *lseg,
187 struct nfs_commit_info *cinfo,
189 void (*clear_request_commit) (struct nfs_page *req,
190 struct nfs_commit_info *cinfo);
191 int (*scan_commit_lists) (struct nfs_commit_info *cinfo,
193 void (*recover_commit_reqs) (struct list_head *list,
194 struct nfs_commit_info *cinfo);
195 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo,
199 struct pnfs_layout_hdr {
200 refcount_t plh_refcount;
201 atomic_t plh_outstanding; /* number of RPCs out */
202 struct list_head plh_layouts; /* other client layouts */
203 struct list_head plh_bulk_destroy;
204 struct list_head plh_segs; /* layout segments list */
205 struct list_head plh_return_segs; /* invalid layout segments */
206 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */
207 unsigned long plh_retry_timestamp;
208 unsigned long plh_flags;
209 nfs4_stateid plh_stateid;
210 u32 plh_barrier; /* ignore lower seqids */
212 enum pnfs_iomode plh_return_iomode;
213 loff_t plh_lwb; /* last write byte for layoutcommit */
214 const struct cred *plh_lc_cred; /* layoutcommit cred */
215 struct inode *plh_inode;
216 struct rcu_head plh_rcu;
220 struct nfs4_deviceid dev_id;
221 unsigned int layout_type;
222 unsigned int mincount;
223 unsigned int maxcount; /* gdia_maxcount */
226 unsigned int pglen; /* reply buffer length */
227 unsigned char nocache : 1;/* May not be cached */
230 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16
232 struct pnfs_devicelist {
234 unsigned int num_devs;
235 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
238 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
239 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
240 extern const struct pnfs_layoutdriver_type *pnfs_find_layoutdriver(u32 id);
241 extern void pnfs_put_layoutdriver(const struct pnfs_layoutdriver_type *ld);
244 extern size_t max_response_pages(struct nfs_server *server);
245 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
246 struct pnfs_device *dev,
247 const struct cred *cred);
248 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout);
249 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync);
252 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
253 void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
255 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *);
256 void unset_pnfs_layoutdriver(struct nfs_server *);
257 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio);
258 void pnfs_generic_pg_check_range(struct nfs_pageio_descriptor *pgio, struct nfs_page *req);
259 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
260 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
261 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
262 struct nfs_page *req, u64 wb_size);
263 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *);
264 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
265 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
266 struct nfs_page *prev, struct nfs_page *req);
267 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
268 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
269 void pnfs_layoutget_free(struct nfs4_layoutget *lgp);
270 void pnfs_free_lseg_list(struct list_head *tmp_list);
271 void pnfs_destroy_layout(struct nfs_inode *);
272 void pnfs_destroy_layout_final(struct nfs_inode *);
273 void pnfs_destroy_all_layouts(struct nfs_client *);
274 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp,
275 struct nfs_fsid *fsid,
277 int pnfs_destroy_layouts_byclid(struct nfs_client *clp,
279 bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst,
280 struct pnfs_layout_range *dst_range,
281 struct inode *inode);
282 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo);
283 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
284 const nfs4_stateid *new,
285 const struct cred *cred,
286 bool update_barrier);
287 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
288 struct list_head *tmp_list,
289 const struct pnfs_layout_range *recall_range,
291 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
292 struct list_head *tmp_list,
293 const struct pnfs_layout_range *recall_range,
295 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo,
296 struct list_head *lseg_list);
297 bool pnfs_roc(struct inode *ino,
298 struct nfs4_layoutreturn_args *args,
299 struct nfs4_layoutreturn_res *res,
300 const struct cred *cred);
301 int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp,
302 struct nfs4_layoutreturn_res **respp, int *ret);
303 void pnfs_roc_release(struct nfs4_layoutreturn_args *args,
304 struct nfs4_layoutreturn_res *res,
306 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task);
307 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t);
308 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
309 int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
310 int pnfs_generic_sync(struct inode *inode, bool datasync);
311 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync);
312 int _pnfs_return_layout(struct inode *);
313 int pnfs_commit_and_return_layout(struct inode *);
314 void pnfs_ld_write_done(struct nfs_pgio_header *);
315 void pnfs_ld_read_done(struct nfs_pgio_header *);
316 void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx);
317 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
318 struct nfs_open_context *ctx,
321 enum pnfs_iomode iomode,
324 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo,
325 const nfs4_stateid *arg_stateid,
326 const struct pnfs_layout_range *range,
327 const nfs4_stateid *stateid);
329 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo,
330 struct pnfs_layout_segment *lseg,
331 bool (*is_after)(const struct pnfs_layout_range *lseg_range,
332 const struct pnfs_layout_range *old),
333 bool (*do_merge)(struct pnfs_layout_segment *lseg,
334 struct pnfs_layout_segment *old),
335 struct list_head *free_me);
337 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
338 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *);
339 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *);
340 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
341 void pnfs_error_mark_layout_for_return(struct inode *inode,
342 struct pnfs_layout_segment *lseg);
343 void pnfs_layout_return_unused_byclid(struct nfs_client *clp,
344 enum pnfs_iomode iomode);
346 /* nfs4_deviceid_flags */
348 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */
349 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */
350 NFS_DEVICEID_NOCACHE, /* device may not be cached */
354 struct nfs4_deviceid_node {
355 struct hlist_node node;
356 struct hlist_node tmpnode;
357 const struct pnfs_layoutdriver_type *ld;
358 const struct nfs_client *nfs_client;
360 unsigned long timestamp_unavailable;
361 struct nfs4_deviceid deviceid;
366 struct nfs4_deviceid_node *
367 nfs4_find_get_deviceid(struct nfs_server *server,
368 const struct nfs4_deviceid *id, const struct cred *cred,
370 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
371 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *,
372 const struct nfs4_deviceid *);
373 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
374 void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node);
375 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
376 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
377 void nfs4_deviceid_purge_client(const struct nfs_client *);
380 struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags);
381 void pnfs_free_commit_array(struct pnfs_commit_array *p);
382 struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *,
383 struct pnfs_commit_array *,
384 struct pnfs_layout_segment *);
386 void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo,
387 struct pnfs_layout_segment *lseg);
388 void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo);
390 void pnfs_generic_clear_request_commit(struct nfs_page *req,
391 struct nfs_commit_info *cinfo);
392 void pnfs_generic_commit_release(void *calldata);
393 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data);
394 void pnfs_generic_rw_release(void *data);
395 void pnfs_generic_recover_commit_reqs(struct list_head *dst,
396 struct nfs_commit_info *cinfo);
397 struct nfs_page *pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo,
399 int pnfs_generic_commit_pagelist(struct inode *inode,
400 struct list_head *mds_pages,
402 struct nfs_commit_info *cinfo,
403 int (*initiate_commit)(struct nfs_commit_data *data,
405 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max);
406 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data);
407 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds);
408 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs,
410 void nfs4_pnfs_v3_ds_connect_unload(void);
411 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
412 struct nfs4_deviceid_node *devid, unsigned int timeo,
413 unsigned int retrans, u32 version, u32 minor_version);
414 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
415 struct xdr_stream *xdr,
417 void pnfs_layout_mark_request_commit(struct nfs_page *req,
418 struct pnfs_layout_segment *lseg,
419 struct nfs_commit_info *cinfo,
421 void pnfs_lgopen_prepare(struct nfs4_opendata *data,
422 struct nfs_open_context *ctx);
423 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp,
424 struct nfs_open_context *ctx);
425 void nfs4_lgopen_release(struct nfs4_layoutget *lgp);
427 static inline bool nfs_have_layout(struct inode *inode)
429 return NFS_I(inode)->layout != NULL;
432 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
434 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0;
437 static inline struct nfs4_deviceid_node *
438 nfs4_get_deviceid(struct nfs4_deviceid_node *d)
444 static inline struct pnfs_layout_segment *
445 pnfs_get_lseg(struct pnfs_layout_segment *lseg)
448 refcount_inc(&lseg->pls_refcount);
449 smp_mb__after_atomic();
455 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg)
457 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0;
460 /* Return true if a layout driver is being used for this mountpoint */
461 static inline int pnfs_enabled_sb(struct nfs_server *nfss)
463 return nfss->pnfs_curr_ld != NULL;
467 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
468 struct nfs_commit_info *cinfo)
470 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
472 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0)
473 return PNFS_NOT_ATTEMPTED;
474 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo);
477 static inline struct pnfs_ds_commit_info *
478 pnfs_get_ds_info(struct inode *inode)
480 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
482 if (ld == NULL || ld->get_ds_info == NULL)
484 return ld->get_ds_info(inode);
488 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
490 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode);
491 if (inode_cinfo != NULL)
492 fl_cinfo->ops = inode_cinfo->ops;
496 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo)
498 INIT_LIST_HEAD(&fl_cinfo->commits);
499 fl_cinfo->ops = NULL;
503 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
505 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL)
506 fl_cinfo->ops->release_ds_info(fl_cinfo, inode);
510 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node)
512 set_bit(NFS_DEVICEID_INVALID, &node->flags);
516 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
517 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
519 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
521 if (!lseg || !fl_cinfo->ops || !fl_cinfo->ops->mark_request_commit)
523 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx);
528 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
530 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
532 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit)
534 fl_cinfo->ops->clear_request_commit(req, cinfo);
539 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
542 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
544 if (!fl_cinfo || fl_cinfo->nwritten == 0)
546 return fl_cinfo->ops->scan_commit_lists(cinfo, max);
550 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo)
552 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
554 if (fl_cinfo && fl_cinfo->nwritten != 0)
555 fl_cinfo->ops->recover_commit_reqs(head, cinfo);
558 static inline struct nfs_page *
559 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
562 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
564 if (!fl_cinfo->ops || !fl_cinfo->ops->search_commit_reqs)
566 return fl_cinfo->ops->search_commit_reqs(cinfo, page);
569 /* Should the pNFS client commit and return the layout upon a setattr */
571 pnfs_ld_layoutret_on_setattr(struct inode *inode)
573 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
575 return NFS_SERVER(inode)->pnfs_curr_ld->flags &
576 PNFS_LAYOUTRET_ON_SETATTR;
580 pnfs_ld_read_whole_page(struct inode *inode)
582 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
584 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE;
588 pnfs_sync_inode(struct inode *inode, bool datasync)
590 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
592 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync);
596 pnfs_layoutcommit_outstanding(struct inode *inode)
598 struct nfs_inode *nfsi = NFS_I(inode);
600 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 ||
601 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0;
604 static inline int pnfs_return_layout(struct inode *ino)
606 struct nfs_inode *nfsi = NFS_I(ino);
607 struct nfs_server *nfss = NFS_SERVER(ino);
609 if (pnfs_enabled_sb(nfss) && nfsi->layout) {
610 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags);
611 return _pnfs_return_layout(ino);
618 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
619 struct nfs_server *nfss)
621 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld &&
622 nfss->pnfs_curr_ld->id == src->l_type);
626 pnfs_calc_offset_end(u64 offset, u64 len)
628 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset)
629 return NFS4_MAX_UINT64;
630 return offset + len - 1;
634 pnfs_calc_offset_length(u64 offset, u64 end)
636 if (end == NFS4_MAX_UINT64 || end <= offset)
637 return NFS4_MAX_UINT64;
638 return 1 + end - offset;
642 pnfs_copy_range(struct pnfs_layout_range *dst,
643 const struct pnfs_layout_range *src)
645 memcpy(dst, src, sizeof(*dst));
649 pnfs_end_offset(u64 start, u64 len)
651 if (NFS4_MAX_UINT64 - start <= len)
652 return NFS4_MAX_UINT64;
657 * Are 2 ranges intersecting?
659 * [----------------------------------)
664 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2)
666 return (end1 == NFS4_MAX_UINT64 || start2 < end1) &&
667 (end2 == NFS4_MAX_UINT64 || start1 < end2);
671 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1,
672 const struct pnfs_layout_range *l2)
674 u64 end1 = pnfs_end_offset(l1->offset, l1->length);
675 u64 end2 = pnfs_end_offset(l2->offset, l2->length);
677 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2);
681 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req)
683 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length);
684 u64 req_last = req_offset(req) + req->wb_bytes;
686 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last,
687 req_offset(req), req_last);
690 static inline void pnfs_lseg_cancel_io(struct nfs_server *server,
691 struct pnfs_layout_segment *lseg)
693 if (server->pnfs_curr_ld->cancel_io)
694 server->pnfs_curr_ld->cancel_io(lseg);
697 extern unsigned int layoutstats_timer;
700 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
702 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id)
706 #endif /* NFS_DEBUG */
707 #else /* CONFIG_NFS_V4_1 */
709 static inline bool nfs_have_layout(struct inode *inode)
714 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
718 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
722 static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi)
726 static inline struct pnfs_layout_segment *
727 pnfs_get_lseg(struct pnfs_layout_segment *lseg)
732 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
736 static inline int pnfs_return_layout(struct inode *ino)
741 static inline int pnfs_commit_and_return_layout(struct inode *inode)
747 pnfs_ld_layoutret_on_setattr(struct inode *inode)
753 pnfs_ld_read_whole_page(struct inode *inode)
759 pnfs_sync_inode(struct inode *inode, bool datasync)
765 pnfs_layoutcommit_outstanding(struct inode *inode)
772 pnfs_roc(struct inode *ino,
773 struct nfs4_layoutreturn_args *args,
774 struct nfs4_layoutreturn_res *res,
775 const struct cred *cred)
781 pnfs_roc_done(struct rpc_task *task,
782 struct nfs4_layoutreturn_args **argpp,
783 struct nfs4_layoutreturn_res **respp,
790 pnfs_roc_release(struct nfs4_layoutreturn_args *args,
791 struct nfs4_layoutreturn_res *res,
797 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task)
802 static inline void set_pnfs_layoutdriver(struct nfs_server *s,
803 const struct nfs_fh *mntfh,
804 struct nfs_fsinfo *fsinfo)
808 static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
813 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
814 struct nfs_commit_info *cinfo)
816 return PNFS_NOT_ATTEMPTED;
819 static inline struct pnfs_ds_commit_info *
820 pnfs_get_ds_info(struct inode *inode)
826 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
831 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo)
836 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
841 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
842 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
848 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
854 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
861 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo)
865 static inline struct nfs_page *
866 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
872 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
878 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
879 struct nfs_server *nfss)
884 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
889 static inline void nfs4_pnfs_v3_ds_connect_unload(void)
893 static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst,
894 struct pnfs_layout_range *dst_range,
900 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data,
901 struct nfs_open_context *ctx)
905 static inline void pnfs_parse_lgopen(struct inode *ino,
906 struct nfs4_layoutget *lgp,
907 struct nfs_open_context *ctx)
911 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp)
915 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
920 #endif /* CONFIG_NFS_V4_1 */
922 #if IS_ENABLED(CONFIG_NFS_V4_2)
923 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags);
926 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags)
932 #endif /* FS_NFS_PNFS_H */