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 */
110 enum layoutdriver_policy_flags {
111 /* Should the pNFS client commit and return the layout upon truncate to
113 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
114 PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
115 PNFS_READ_WHOLE_PAGE = 1 << 2,
116 PNFS_LAYOUTGET_ON_OPEN = 1 << 3,
119 struct nfs4_deviceid_node;
121 /* Per-layout driver specific registration structure */
122 struct pnfs_layoutdriver_type {
123 struct list_head pnfs_tblid;
126 struct module *owner;
128 unsigned max_deviceinfo_size;
129 unsigned max_layoutget_response;
131 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
132 int (*clear_layoutdriver) (struct nfs_server *);
134 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
135 void (*free_layout_hdr) (struct pnfs_layout_hdr *);
137 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
138 void (*free_lseg) (struct pnfs_layout_segment *lseg);
139 void (*add_lseg) (struct pnfs_layout_hdr *layoutid,
140 struct pnfs_layout_segment *lseg,
141 struct list_head *free_me);
143 void (*return_range) (struct pnfs_layout_hdr *lo,
144 struct pnfs_layout_range *range);
146 /* test for nfs page cache coalescing */
147 const struct nfs_pageio_ops *pg_read_ops;
148 const struct nfs_pageio_ops *pg_write_ops;
150 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode);
152 int (*sync)(struct inode *inode, bool datasync);
155 * Return PNFS_ATTEMPTED to indicate the layout code has attempted
156 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS
158 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *);
159 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int);
161 void (*free_deviceid_node) (struct nfs4_deviceid_node *);
162 struct nfs4_deviceid_node * (*alloc_deviceid_node)
163 (struct nfs_server *server, struct pnfs_device *pdev,
166 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *);
168 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data);
169 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args);
170 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args);
173 struct pnfs_commit_ops {
174 void (*setup_ds_info)(struct pnfs_ds_commit_info *,
175 struct pnfs_layout_segment *);
176 void (*release_ds_info)(struct pnfs_ds_commit_info *,
177 struct inode *inode);
178 int (*commit_pagelist)(struct inode *inode,
179 struct list_head *mds_pages,
181 struct nfs_commit_info *cinfo);
182 void (*mark_request_commit) (struct nfs_page *req,
183 struct pnfs_layout_segment *lseg,
184 struct nfs_commit_info *cinfo,
186 void (*clear_request_commit) (struct nfs_page *req,
187 struct nfs_commit_info *cinfo);
188 int (*scan_commit_lists) (struct nfs_commit_info *cinfo,
190 void (*recover_commit_reqs) (struct list_head *list,
191 struct nfs_commit_info *cinfo);
192 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo,
196 struct pnfs_layout_hdr {
197 refcount_t plh_refcount;
198 atomic_t plh_outstanding; /* number of RPCs out */
199 struct list_head plh_layouts; /* other client layouts */
200 struct list_head plh_bulk_destroy;
201 struct list_head plh_segs; /* layout segments list */
202 struct list_head plh_return_segs; /* invalid layout segments */
203 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */
204 unsigned long plh_retry_timestamp;
205 unsigned long plh_flags;
206 nfs4_stateid plh_stateid;
207 u32 plh_barrier; /* ignore lower seqids */
209 enum pnfs_iomode plh_return_iomode;
210 loff_t plh_lwb; /* last write byte for layoutcommit */
211 const struct cred *plh_lc_cred; /* layoutcommit cred */
212 struct inode *plh_inode;
213 struct rcu_head plh_rcu;
217 struct nfs4_deviceid dev_id;
218 unsigned int layout_type;
219 unsigned int mincount;
220 unsigned int maxcount; /* gdia_maxcount */
223 unsigned int pglen; /* reply buffer length */
224 unsigned char nocache : 1;/* May not be cached */
227 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16
229 struct pnfs_devicelist {
231 unsigned int num_devs;
232 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
235 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
236 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
239 extern size_t max_response_pages(struct nfs_server *server);
240 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
241 struct pnfs_device *dev,
242 const struct cred *cred);
243 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout);
244 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync);
247 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
248 void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
250 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *);
251 void unset_pnfs_layoutdriver(struct nfs_server *);
252 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio);
253 void pnfs_generic_pg_check_range(struct nfs_pageio_descriptor *pgio, struct nfs_page *req);
254 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
255 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
256 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
257 struct nfs_page *req, u64 wb_size);
258 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *);
259 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
260 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
261 struct nfs_page *prev, struct nfs_page *req);
262 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
263 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
264 void pnfs_layoutget_free(struct nfs4_layoutget *lgp);
265 void pnfs_free_lseg_list(struct list_head *tmp_list);
266 void pnfs_destroy_layout(struct nfs_inode *);
267 void pnfs_destroy_layout_final(struct nfs_inode *);
268 void pnfs_destroy_all_layouts(struct nfs_client *);
269 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp,
270 struct nfs_fsid *fsid,
272 int pnfs_destroy_layouts_byclid(struct nfs_client *clp,
274 bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst,
275 struct pnfs_layout_range *dst_range,
276 struct inode *inode);
277 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo);
278 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
279 const nfs4_stateid *new,
280 const struct cred *cred,
281 bool update_barrier);
282 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
283 struct list_head *tmp_list,
284 const struct pnfs_layout_range *recall_range,
286 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
287 struct list_head *tmp_list,
288 const struct pnfs_layout_range *recall_range,
290 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo,
291 struct list_head *lseg_list);
292 bool pnfs_roc(struct inode *ino,
293 struct nfs4_layoutreturn_args *args,
294 struct nfs4_layoutreturn_res *res,
295 const struct cred *cred);
296 int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp,
297 struct nfs4_layoutreturn_res **respp, int *ret);
298 void pnfs_roc_release(struct nfs4_layoutreturn_args *args,
299 struct nfs4_layoutreturn_res *res,
301 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task);
302 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t);
303 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
304 int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
305 int pnfs_generic_sync(struct inode *inode, bool datasync);
306 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync);
307 int _pnfs_return_layout(struct inode *);
308 int pnfs_commit_and_return_layout(struct inode *);
309 void pnfs_ld_write_done(struct nfs_pgio_header *);
310 void pnfs_ld_read_done(struct nfs_pgio_header *);
311 void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx);
312 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
313 struct nfs_open_context *ctx,
316 enum pnfs_iomode iomode,
319 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo,
320 const nfs4_stateid *arg_stateid,
321 const struct pnfs_layout_range *range,
322 const nfs4_stateid *stateid);
324 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo,
325 struct pnfs_layout_segment *lseg,
326 bool (*is_after)(const struct pnfs_layout_range *lseg_range,
327 const struct pnfs_layout_range *old),
328 bool (*do_merge)(struct pnfs_layout_segment *lseg,
329 struct pnfs_layout_segment *old),
330 struct list_head *free_me);
332 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
333 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *);
334 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *);
335 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
336 void pnfs_error_mark_layout_for_return(struct inode *inode,
337 struct pnfs_layout_segment *lseg);
338 void pnfs_layout_return_unused_byclid(struct nfs_client *clp,
339 enum pnfs_iomode iomode);
341 /* nfs4_deviceid_flags */
343 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */
344 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */
345 NFS_DEVICEID_NOCACHE, /* device may not be cached */
349 struct nfs4_deviceid_node {
350 struct hlist_node node;
351 struct hlist_node tmpnode;
352 const struct pnfs_layoutdriver_type *ld;
353 const struct nfs_client *nfs_client;
355 unsigned long timestamp_unavailable;
356 struct nfs4_deviceid deviceid;
361 struct nfs4_deviceid_node *
362 nfs4_find_get_deviceid(struct nfs_server *server,
363 const struct nfs4_deviceid *id, const struct cred *cred,
365 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
366 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *,
367 const struct nfs4_deviceid *);
368 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
369 void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node);
370 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
371 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
372 void nfs4_deviceid_purge_client(const struct nfs_client *);
375 struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags);
376 void pnfs_free_commit_array(struct pnfs_commit_array *p);
377 struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *,
378 struct pnfs_commit_array *,
379 struct pnfs_layout_segment *);
381 void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo,
382 struct pnfs_layout_segment *lseg);
383 void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo);
385 void pnfs_generic_clear_request_commit(struct nfs_page *req,
386 struct nfs_commit_info *cinfo);
387 void pnfs_generic_commit_release(void *calldata);
388 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data);
389 void pnfs_generic_rw_release(void *data);
390 void pnfs_generic_recover_commit_reqs(struct list_head *dst,
391 struct nfs_commit_info *cinfo);
392 struct nfs_page *pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo,
394 int pnfs_generic_commit_pagelist(struct inode *inode,
395 struct list_head *mds_pages,
397 struct nfs_commit_info *cinfo,
398 int (*initiate_commit)(struct nfs_commit_data *data,
400 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max);
401 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data);
402 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds);
403 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs,
405 void nfs4_pnfs_v3_ds_connect_unload(void);
406 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
407 struct nfs4_deviceid_node *devid, unsigned int timeo,
408 unsigned int retrans, u32 version, u32 minor_version);
409 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
410 struct xdr_stream *xdr,
412 void pnfs_layout_mark_request_commit(struct nfs_page *req,
413 struct pnfs_layout_segment *lseg,
414 struct nfs_commit_info *cinfo,
416 void pnfs_lgopen_prepare(struct nfs4_opendata *data,
417 struct nfs_open_context *ctx);
418 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp,
419 struct nfs_open_context *ctx);
420 void nfs4_lgopen_release(struct nfs4_layoutget *lgp);
422 static inline bool nfs_have_layout(struct inode *inode)
424 return NFS_I(inode)->layout != NULL;
427 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
429 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0;
432 static inline struct nfs4_deviceid_node *
433 nfs4_get_deviceid(struct nfs4_deviceid_node *d)
439 static inline struct pnfs_layout_segment *
440 pnfs_get_lseg(struct pnfs_layout_segment *lseg)
443 refcount_inc(&lseg->pls_refcount);
444 smp_mb__after_atomic();
450 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg)
452 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0;
455 /* Return true if a layout driver is being used for this mountpoint */
456 static inline int pnfs_enabled_sb(struct nfs_server *nfss)
458 return nfss->pnfs_curr_ld != NULL;
462 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
463 struct nfs_commit_info *cinfo)
465 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
467 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0)
468 return PNFS_NOT_ATTEMPTED;
469 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo);
472 static inline struct pnfs_ds_commit_info *
473 pnfs_get_ds_info(struct inode *inode)
475 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
477 if (ld == NULL || ld->get_ds_info == NULL)
479 return ld->get_ds_info(inode);
483 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
485 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode);
486 if (inode_cinfo != NULL)
487 fl_cinfo->ops = inode_cinfo->ops;
491 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo)
493 INIT_LIST_HEAD(&fl_cinfo->commits);
494 fl_cinfo->ops = NULL;
498 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
500 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL)
501 fl_cinfo->ops->release_ds_info(fl_cinfo, inode);
505 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node)
507 set_bit(NFS_DEVICEID_INVALID, &node->flags);
511 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
512 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
514 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
516 if (!lseg || !fl_cinfo->ops || !fl_cinfo->ops->mark_request_commit)
518 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx);
523 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
525 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
527 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit)
529 fl_cinfo->ops->clear_request_commit(req, cinfo);
534 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
537 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
539 if (!fl_cinfo || fl_cinfo->nwritten == 0)
541 return fl_cinfo->ops->scan_commit_lists(cinfo, max);
545 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo)
547 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
549 if (fl_cinfo && fl_cinfo->nwritten != 0)
550 fl_cinfo->ops->recover_commit_reqs(head, cinfo);
553 static inline struct nfs_page *
554 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
557 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
559 if (!fl_cinfo->ops || !fl_cinfo->ops->search_commit_reqs)
561 return fl_cinfo->ops->search_commit_reqs(cinfo, page);
564 /* Should the pNFS client commit and return the layout upon a setattr */
566 pnfs_ld_layoutret_on_setattr(struct inode *inode)
568 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
570 return NFS_SERVER(inode)->pnfs_curr_ld->flags &
571 PNFS_LAYOUTRET_ON_SETATTR;
575 pnfs_ld_read_whole_page(struct inode *inode)
577 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
579 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE;
583 pnfs_sync_inode(struct inode *inode, bool datasync)
585 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
587 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync);
591 pnfs_layoutcommit_outstanding(struct inode *inode)
593 struct nfs_inode *nfsi = NFS_I(inode);
595 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 ||
596 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0;
599 static inline int pnfs_return_layout(struct inode *ino)
601 struct nfs_inode *nfsi = NFS_I(ino);
602 struct nfs_server *nfss = NFS_SERVER(ino);
604 if (pnfs_enabled_sb(nfss) && nfsi->layout) {
605 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags);
606 return _pnfs_return_layout(ino);
613 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
614 struct nfs_server *nfss)
616 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld &&
617 nfss->pnfs_curr_ld->id == src->l_type);
621 pnfs_calc_offset_end(u64 offset, u64 len)
623 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset)
624 return NFS4_MAX_UINT64;
625 return offset + len - 1;
629 pnfs_calc_offset_length(u64 offset, u64 end)
631 if (end == NFS4_MAX_UINT64 || end <= offset)
632 return NFS4_MAX_UINT64;
633 return 1 + end - offset;
637 pnfs_copy_range(struct pnfs_layout_range *dst,
638 const struct pnfs_layout_range *src)
640 memcpy(dst, src, sizeof(*dst));
644 pnfs_end_offset(u64 start, u64 len)
646 if (NFS4_MAX_UINT64 - start <= len)
647 return NFS4_MAX_UINT64;
652 * Are 2 ranges intersecting?
654 * [----------------------------------)
659 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2)
661 return (end1 == NFS4_MAX_UINT64 || start2 < end1) &&
662 (end2 == NFS4_MAX_UINT64 || start1 < end2);
666 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1,
667 const struct pnfs_layout_range *l2)
669 u64 end1 = pnfs_end_offset(l1->offset, l1->length);
670 u64 end2 = pnfs_end_offset(l2->offset, l2->length);
672 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2);
676 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req)
678 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length);
679 u64 req_last = req_offset(req) + req->wb_bytes;
681 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last,
682 req_offset(req), req_last);
685 extern unsigned int layoutstats_timer;
688 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
690 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id)
694 #endif /* NFS_DEBUG */
695 #else /* CONFIG_NFS_V4_1 */
697 static inline bool nfs_have_layout(struct inode *inode)
702 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
706 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
710 static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi)
714 static inline struct pnfs_layout_segment *
715 pnfs_get_lseg(struct pnfs_layout_segment *lseg)
720 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
724 static inline int pnfs_return_layout(struct inode *ino)
729 static inline int pnfs_commit_and_return_layout(struct inode *inode)
735 pnfs_ld_layoutret_on_setattr(struct inode *inode)
741 pnfs_ld_read_whole_page(struct inode *inode)
747 pnfs_sync_inode(struct inode *inode, bool datasync)
753 pnfs_layoutcommit_outstanding(struct inode *inode)
760 pnfs_roc(struct inode *ino,
761 struct nfs4_layoutreturn_args *args,
762 struct nfs4_layoutreturn_res *res,
763 const struct cred *cred)
769 pnfs_roc_done(struct rpc_task *task,
770 struct nfs4_layoutreturn_args **argpp,
771 struct nfs4_layoutreturn_res **respp,
778 pnfs_roc_release(struct nfs4_layoutreturn_args *args,
779 struct nfs4_layoutreturn_res *res,
785 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task)
790 static inline void set_pnfs_layoutdriver(struct nfs_server *s,
791 const struct nfs_fh *mntfh,
792 struct nfs_fsinfo *fsinfo)
796 static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
801 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
802 struct nfs_commit_info *cinfo)
804 return PNFS_NOT_ATTEMPTED;
807 static inline struct pnfs_ds_commit_info *
808 pnfs_get_ds_info(struct inode *inode)
814 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
819 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo)
824 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
829 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
830 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
836 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
842 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
849 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo)
853 static inline struct nfs_page *
854 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
860 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
866 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
867 struct nfs_server *nfss)
872 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
877 static inline void nfs4_pnfs_v3_ds_connect_unload(void)
881 static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst,
882 struct pnfs_layout_range *dst_range,
888 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data,
889 struct nfs_open_context *ctx)
893 static inline void pnfs_parse_lgopen(struct inode *ino,
894 struct nfs4_layoutget *lgp,
895 struct nfs_open_context *ctx)
899 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp)
903 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
908 #endif /* CONFIG_NFS_V4_1 */
910 #if IS_ENABLED(CONFIG_NFS_V4_2)
911 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags);
914 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags)
920 #endif /* FS_NFS_PNFS_H */