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 */
57 struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */
58 char *ds_remotestr; /* comma sep list of addrs */
59 struct list_head ds_addrs;
60 struct nfs_client *ds_clp;
62 unsigned long ds_state;
63 #define NFS4DS_CONNECTING 0 /* ds is establishing connection */
66 struct pnfs_layout_segment {
67 struct list_head pls_list;
68 struct list_head pls_lc_list;
69 struct pnfs_layout_range pls_range;
70 refcount_t pls_refcount;
72 unsigned long pls_flags;
73 struct pnfs_layout_hdr *pls_layout;
76 enum pnfs_try_status {
78 PNFS_NOT_ATTEMPTED = 1,
82 #ifdef CONFIG_NFS_V4_1
84 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
87 * Default data server connection timeout and retrans vaules.
88 * Set by module parameters dataserver_timeo and dataserver_retrans.
90 #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */
91 #define NFS4_DEF_DS_RETRANS 5
92 #define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ)
94 /* error codes for internal use */
95 #define NFS4ERR_RESET_TO_MDS 12001
96 #define NFS4ERR_RESET_TO_PNFS 12002
99 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */
100 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */
101 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
102 NFS_LAYOUT_RETURN, /* layoutreturn in progress */
103 NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */
104 NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */
105 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */
106 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */
107 NFS_LAYOUT_INODE_FREEING, /* The inode is being freed */
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;
130 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
131 int (*clear_layoutdriver) (struct nfs_server *);
133 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
134 void (*free_layout_hdr) (struct pnfs_layout_hdr *);
136 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
137 void (*free_lseg) (struct pnfs_layout_segment *lseg);
138 void (*add_lseg) (struct pnfs_layout_hdr *layoutid,
139 struct pnfs_layout_segment *lseg,
140 struct list_head *free_me);
142 void (*return_range) (struct pnfs_layout_hdr *lo,
143 struct pnfs_layout_range *range);
145 /* test for nfs page cache coalescing */
146 const struct nfs_pageio_ops *pg_read_ops;
147 const struct nfs_pageio_ops *pg_write_ops;
149 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode);
150 void (*mark_request_commit) (struct nfs_page *req,
151 struct pnfs_layout_segment *lseg,
152 struct nfs_commit_info *cinfo,
154 void (*clear_request_commit) (struct nfs_page *req,
155 struct nfs_commit_info *cinfo);
156 int (*scan_commit_lists) (struct nfs_commit_info *cinfo,
158 void (*recover_commit_reqs) (struct list_head *list,
159 struct nfs_commit_info *cinfo);
160 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo,
162 int (*commit_pagelist)(struct inode *inode,
163 struct list_head *mds_pages,
165 struct nfs_commit_info *cinfo);
167 int (*sync)(struct inode *inode, bool datasync);
170 * Return PNFS_ATTEMPTED to indicate the layout code has attempted
171 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS
173 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *);
174 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int);
176 void (*free_deviceid_node) (struct nfs4_deviceid_node *);
177 struct nfs4_deviceid_node * (*alloc_deviceid_node)
178 (struct nfs_server *server, struct pnfs_device *pdev,
181 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *);
183 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data);
184 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args);
185 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args);
188 struct pnfs_layout_hdr {
189 refcount_t plh_refcount;
190 atomic_t plh_outstanding; /* number of RPCs out */
191 struct list_head plh_layouts; /* other client layouts */
192 struct list_head plh_bulk_destroy;
193 struct list_head plh_segs; /* layout segments list */
194 struct list_head plh_return_segs; /* invalid layout segments */
195 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */
196 unsigned long plh_retry_timestamp;
197 unsigned long plh_flags;
198 nfs4_stateid plh_stateid;
199 u32 plh_barrier; /* ignore lower seqids */
201 enum pnfs_iomode plh_return_iomode;
202 loff_t plh_lwb; /* last write byte for layoutcommit */
203 struct rpc_cred *plh_lc_cred; /* layoutcommit cred */
204 struct inode *plh_inode;
208 struct nfs4_deviceid dev_id;
209 unsigned int layout_type;
210 unsigned int mincount;
211 unsigned int maxcount; /* gdia_maxcount */
214 unsigned int pglen; /* reply buffer length */
215 unsigned char nocache : 1;/* May not be cached */
218 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16
220 struct pnfs_devicelist {
222 unsigned int num_devs;
223 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
226 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
227 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
230 extern size_t max_response_pages(struct nfs_server *server);
231 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
232 struct pnfs_device *dev,
233 struct rpc_cred *cred);
234 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout);
235 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync);
238 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
239 void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
241 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *);
242 void unset_pnfs_layoutdriver(struct nfs_server *);
243 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio);
244 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
245 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
246 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
247 struct nfs_page *req, u64 wb_size);
248 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *);
249 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
250 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
251 struct nfs_page *prev, struct nfs_page *req);
252 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
253 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
254 void pnfs_layoutget_free(struct nfs4_layoutget *lgp);
255 void pnfs_free_lseg_list(struct list_head *tmp_list);
256 void pnfs_destroy_layout(struct nfs_inode *);
257 void pnfs_destroy_layout_final(struct nfs_inode *);
258 void pnfs_destroy_all_layouts(struct nfs_client *);
259 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp,
260 struct nfs_fsid *fsid,
262 int pnfs_destroy_layouts_byclid(struct nfs_client *clp,
264 bool nfs4_layoutreturn_refresh_stateid(nfs4_stateid *dst,
265 struct pnfs_layout_range *dst_range,
266 struct inode *inode);
267 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo);
268 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
269 const nfs4_stateid *new,
270 bool update_barrier);
271 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
272 struct list_head *tmp_list,
273 const struct pnfs_layout_range *recall_range,
275 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
276 struct list_head *tmp_list,
277 const struct pnfs_layout_range *recall_range,
279 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo,
280 struct list_head *lseg_list);
281 bool pnfs_roc(struct inode *ino,
282 struct nfs4_layoutreturn_args *args,
283 struct nfs4_layoutreturn_res *res,
284 const struct rpc_cred *cred);
285 void pnfs_roc_release(struct nfs4_layoutreturn_args *args,
286 struct nfs4_layoutreturn_res *res,
288 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task);
289 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t);
290 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
291 int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
292 int pnfs_generic_sync(struct inode *inode, bool datasync);
293 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync);
294 int _pnfs_return_layout(struct inode *);
295 int pnfs_commit_and_return_layout(struct inode *);
296 void pnfs_ld_write_done(struct nfs_pgio_header *);
297 void pnfs_ld_read_done(struct nfs_pgio_header *);
298 void pnfs_read_resend_pnfs(struct nfs_pgio_header *);
299 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
300 struct nfs_open_context *ctx,
303 enum pnfs_iomode iomode,
306 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo,
307 const nfs4_stateid *arg_stateid,
308 const struct pnfs_layout_range *range,
309 const nfs4_stateid *stateid);
311 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo,
312 struct pnfs_layout_segment *lseg,
313 bool (*is_after)(const struct pnfs_layout_range *lseg_range,
314 const struct pnfs_layout_range *old),
315 bool (*do_merge)(struct pnfs_layout_segment *lseg,
316 struct pnfs_layout_segment *old),
317 struct list_head *free_me);
319 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
320 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *);
321 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *);
322 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
323 void pnfs_error_mark_layout_for_return(struct inode *inode,
324 struct pnfs_layout_segment *lseg);
325 /* nfs4_deviceid_flags */
327 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */
328 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */
329 NFS_DEVICEID_NOCACHE, /* device may not be cached */
333 struct nfs4_deviceid_node {
334 struct hlist_node node;
335 struct hlist_node tmpnode;
336 const struct pnfs_layoutdriver_type *ld;
337 const struct nfs_client *nfs_client;
339 unsigned long timestamp_unavailable;
340 struct nfs4_deviceid deviceid;
345 struct nfs4_deviceid_node *
346 nfs4_find_get_deviceid(struct nfs_server *server,
347 const struct nfs4_deviceid *id, struct rpc_cred *cred,
349 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
350 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *,
351 const struct nfs4_deviceid *);
352 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
353 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
354 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
355 void nfs4_deviceid_purge_client(const struct nfs_client *);
358 void pnfs_generic_clear_request_commit(struct nfs_page *req,
359 struct nfs_commit_info *cinfo);
360 void pnfs_generic_commit_release(void *calldata);
361 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data);
362 void pnfs_generic_rw_release(void *data);
363 void pnfs_generic_recover_commit_reqs(struct list_head *dst,
364 struct nfs_commit_info *cinfo);
365 int pnfs_generic_commit_pagelist(struct inode *inode,
366 struct list_head *mds_pages,
368 struct nfs_commit_info *cinfo,
369 int (*initiate_commit)(struct nfs_commit_data *data,
371 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max);
372 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data);
373 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds);
374 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs,
376 void nfs4_pnfs_v3_ds_connect_unload(void);
377 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
378 struct nfs4_deviceid_node *devid, unsigned int timeo,
379 unsigned int retrans, u32 version, u32 minor_version);
380 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
381 struct xdr_stream *xdr,
383 void pnfs_layout_mark_request_commit(struct nfs_page *req,
384 struct pnfs_layout_segment *lseg,
385 struct nfs_commit_info *cinfo,
387 void pnfs_lgopen_prepare(struct nfs4_opendata *data,
388 struct nfs_open_context *ctx);
389 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp,
390 struct nfs_open_context *ctx);
391 void nfs4_lgopen_release(struct nfs4_layoutget *lgp);
393 static inline bool nfs_have_layout(struct inode *inode)
395 return NFS_I(inode)->layout != NULL;
398 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
400 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0;
403 static inline struct nfs4_deviceid_node *
404 nfs4_get_deviceid(struct nfs4_deviceid_node *d)
410 static inline struct pnfs_layout_segment *
411 pnfs_get_lseg(struct pnfs_layout_segment *lseg)
414 refcount_inc(&lseg->pls_refcount);
415 smp_mb__after_atomic();
421 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg)
423 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0;
426 /* Return true if a layout driver is being used for this mountpoint */
427 static inline int pnfs_enabled_sb(struct nfs_server *nfss)
429 return nfss->pnfs_curr_ld != NULL;
433 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
434 struct nfs_commit_info *cinfo)
436 if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0)
437 return PNFS_NOT_ATTEMPTED;
438 return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo);
441 static inline struct pnfs_ds_commit_info *
442 pnfs_get_ds_info(struct inode *inode)
444 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
446 if (ld == NULL || ld->get_ds_info == NULL)
448 return ld->get_ds_info(inode);
452 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node)
454 set_bit(NFS_DEVICEID_INVALID, &node->flags);
458 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
459 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
461 struct inode *inode = d_inode(req->wb_context->dentry);
462 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
464 if (lseg == NULL || ld->mark_request_commit == NULL)
466 ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx);
471 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
473 struct inode *inode = d_inode(req->wb_context->dentry);
474 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
476 if (ld == NULL || ld->clear_request_commit == NULL)
478 ld->clear_request_commit(req, cinfo);
483 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
486 if (cinfo->ds == NULL || cinfo->ds->nwritten == 0)
489 return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max);
492 static inline struct nfs_page *
493 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
496 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
498 if (ld == NULL || ld->search_commit_reqs == NULL)
500 return ld->search_commit_reqs(cinfo, page);
503 /* Should the pNFS client commit and return the layout upon a setattr */
505 pnfs_ld_layoutret_on_setattr(struct inode *inode)
507 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
509 return NFS_SERVER(inode)->pnfs_curr_ld->flags &
510 PNFS_LAYOUTRET_ON_SETATTR;
514 pnfs_ld_read_whole_page(struct inode *inode)
516 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
518 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE;
522 pnfs_sync_inode(struct inode *inode, bool datasync)
524 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
526 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync);
530 pnfs_layoutcommit_outstanding(struct inode *inode)
532 struct nfs_inode *nfsi = NFS_I(inode);
534 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 ||
535 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0;
538 static inline int pnfs_return_layout(struct inode *ino)
540 struct nfs_inode *nfsi = NFS_I(ino);
541 struct nfs_server *nfss = NFS_SERVER(ino);
543 if (pnfs_enabled_sb(nfss) && nfsi->layout) {
544 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags);
545 return _pnfs_return_layout(ino);
552 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
553 struct nfs_server *nfss)
555 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld &&
556 nfss->pnfs_curr_ld->id == src->l_type);
560 pnfs_calc_offset_end(u64 offset, u64 len)
562 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset)
563 return NFS4_MAX_UINT64;
564 return offset + len - 1;
568 pnfs_calc_offset_length(u64 offset, u64 end)
570 if (end == NFS4_MAX_UINT64 || end <= offset)
571 return NFS4_MAX_UINT64;
572 return 1 + end - offset;
576 pnfs_copy_range(struct pnfs_layout_range *dst,
577 const struct pnfs_layout_range *src)
579 memcpy(dst, src, sizeof(*dst));
583 pnfs_end_offset(u64 start, u64 len)
585 if (NFS4_MAX_UINT64 - start <= len)
586 return NFS4_MAX_UINT64;
591 * Are 2 ranges intersecting?
593 * [----------------------------------)
598 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2)
600 return (end1 == NFS4_MAX_UINT64 || start2 < end1) &&
601 (end2 == NFS4_MAX_UINT64 || start1 < end2);
605 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1,
606 const struct pnfs_layout_range *l2)
608 u64 end1 = pnfs_end_offset(l1->offset, l1->length);
609 u64 end2 = pnfs_end_offset(l2->offset, l2->length);
611 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2);
615 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req)
617 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length);
618 u64 req_last = req_offset(req) + req->wb_bytes;
620 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last,
621 req_offset(req), req_last);
624 extern unsigned int layoutstats_timer;
627 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
629 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id)
633 #endif /* NFS_DEBUG */
634 #else /* CONFIG_NFS_V4_1 */
636 static inline bool nfs_have_layout(struct inode *inode)
641 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
645 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
649 static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi)
653 static inline struct pnfs_layout_segment *
654 pnfs_get_lseg(struct pnfs_layout_segment *lseg)
659 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
663 static inline int pnfs_return_layout(struct inode *ino)
668 static inline int pnfs_commit_and_return_layout(struct inode *inode)
674 pnfs_ld_layoutret_on_setattr(struct inode *inode)
680 pnfs_ld_read_whole_page(struct inode *inode)
686 pnfs_sync_inode(struct inode *inode, bool datasync)
692 pnfs_layoutcommit_outstanding(struct inode *inode)
699 pnfs_roc(struct inode *ino,
700 struct nfs4_layoutreturn_args *args,
701 struct nfs4_layoutreturn_res *res,
702 const struct rpc_cred *cred)
708 pnfs_roc_release(struct nfs4_layoutreturn_args *args,
709 struct nfs4_layoutreturn_res *res,
715 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task)
720 static inline void set_pnfs_layoutdriver(struct nfs_server *s,
721 const struct nfs_fh *mntfh,
722 struct nfs_fsinfo *fsinfo)
726 static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
731 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
732 struct nfs_commit_info *cinfo)
734 return PNFS_NOT_ATTEMPTED;
737 static inline struct pnfs_ds_commit_info *
738 pnfs_get_ds_info(struct inode *inode)
744 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
745 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
751 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
757 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
763 static inline struct nfs_page *
764 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
770 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
776 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
777 struct nfs_server *nfss)
782 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
787 static inline void nfs4_pnfs_v3_ds_connect_unload(void)
791 static inline bool nfs4_layoutreturn_refresh_stateid(nfs4_stateid *dst,
792 struct pnfs_layout_range *dst_range,
798 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data,
799 struct nfs_open_context *ctx)
803 static inline void pnfs_parse_lgopen(struct inode *ino,
804 struct nfs4_layoutget *lgp,
805 struct nfs_open_context *ctx)
809 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp)
813 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
818 #endif /* CONFIG_NFS_V4_1 */
820 #if IS_ENABLED(CONFIG_NFS_V4_2)
821 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags);
824 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags)
830 #endif /* FS_NFS_PNFS_H */