2 * pNFS client data structures.
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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>
38 struct nfs4_exception;
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 */
49 /* Individual ip address */
50 struct nfs4_pnfs_ds_addr {
51 struct sockaddr_storage da_addr;
53 struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */
54 char *da_remotestr; /* human readable addr+port */
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 struct nfs_client *ds_clp;
65 unsigned long ds_state;
66 #define NFS4DS_CONNECTING 0 /* ds is establishing connection */
69 struct pnfs_layout_segment {
70 struct list_head pls_list;
71 struct list_head pls_lc_list;
72 struct list_head pls_commits;
73 struct pnfs_layout_range pls_range;
74 refcount_t pls_refcount;
76 unsigned long pls_flags;
77 struct pnfs_layout_hdr *pls_layout;
80 enum pnfs_try_status {
82 PNFS_NOT_ATTEMPTED = 1,
86 #ifdef CONFIG_NFS_V4_1
88 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4"
91 * Default data server connection timeout and retrans vaules.
92 * Set by module parameters dataserver_timeo and dataserver_retrans.
94 #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */
95 #define NFS4_DEF_DS_RETRANS 5
96 #define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ)
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 */
108 NFS_LAYOUT_HASHED, /* The layout visible */
112 enum layoutdriver_policy_flags {
113 /* Should the pNFS client commit and return the layout upon truncate to
115 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
116 PNFS_LAYOUTRET_ON_ERROR = 1 << 1,
117 PNFS_READ_WHOLE_PAGE = 1 << 2,
118 PNFS_LAYOUTGET_ON_OPEN = 1 << 3,
121 struct nfs4_deviceid_node;
123 /* Per-layout driver specific registration structure */
124 struct pnfs_layoutdriver_type {
125 struct list_head pnfs_tblid;
128 struct module *owner;
130 unsigned max_deviceinfo_size;
131 unsigned max_layoutget_response;
133 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *);
134 int (*clear_layoutdriver) (struct nfs_server *);
136 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
137 void (*free_layout_hdr) (struct pnfs_layout_hdr *);
139 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags);
140 void (*free_lseg) (struct pnfs_layout_segment *lseg);
141 void (*add_lseg) (struct pnfs_layout_hdr *layoutid,
142 struct pnfs_layout_segment *lseg,
143 struct list_head *free_me);
145 void (*return_range) (struct pnfs_layout_hdr *lo,
146 struct pnfs_layout_range *range);
148 /* test for nfs page cache coalescing */
149 const struct nfs_pageio_ops *pg_read_ops;
150 const struct nfs_pageio_ops *pg_write_ops;
152 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode);
154 int (*sync)(struct inode *inode, bool datasync);
157 * Return PNFS_ATTEMPTED to indicate the layout code has attempted
158 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS
160 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *);
161 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int);
163 void (*free_deviceid_node) (struct nfs4_deviceid_node *);
164 struct nfs4_deviceid_node * (*alloc_deviceid_node)
165 (struct nfs_server *server, struct pnfs_device *pdev,
168 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *);
170 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data);
171 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args);
172 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args);
174 void (*cancel_io)(struct pnfs_layout_segment *lseg);
177 struct pnfs_commit_ops {
178 void (*setup_ds_info)(struct pnfs_ds_commit_info *,
179 struct pnfs_layout_segment *);
180 void (*release_ds_info)(struct pnfs_ds_commit_info *,
181 struct inode *inode);
182 int (*commit_pagelist)(struct inode *inode,
183 struct list_head *mds_pages,
185 struct nfs_commit_info *cinfo);
186 void (*mark_request_commit) (struct nfs_page *req,
187 struct pnfs_layout_segment *lseg,
188 struct nfs_commit_info *cinfo,
190 void (*clear_request_commit) (struct nfs_page *req,
191 struct nfs_commit_info *cinfo);
192 int (*scan_commit_lists) (struct nfs_commit_info *cinfo,
194 void (*recover_commit_reqs) (struct list_head *list,
195 struct nfs_commit_info *cinfo);
196 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo,
197 struct folio *folio);
200 struct pnfs_layout_hdr {
201 refcount_t plh_refcount;
202 atomic_t plh_outstanding; /* number of RPCs out */
203 struct list_head plh_layouts; /* other client layouts */
204 struct list_head plh_bulk_destroy;
205 struct list_head plh_segs; /* layout segments list */
206 struct list_head plh_return_segs; /* invalid layout segments */
207 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */
208 unsigned long plh_retry_timestamp;
209 unsigned long plh_flags;
210 nfs4_stateid plh_stateid;
211 u32 plh_barrier; /* ignore lower seqids */
213 enum pnfs_iomode plh_return_iomode;
214 loff_t plh_lwb; /* last write byte for layoutcommit */
215 const struct cred *plh_lc_cred; /* layoutcommit cred */
216 struct inode *plh_inode;
217 struct rcu_head plh_rcu;
221 struct nfs4_deviceid dev_id;
222 unsigned int layout_type;
223 unsigned int mincount;
224 unsigned int maxcount; /* gdia_maxcount */
227 unsigned int pglen; /* reply buffer length */
228 unsigned char nocache : 1;/* May not be cached */
231 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16
233 struct pnfs_devicelist {
235 unsigned int num_devs;
236 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM];
239 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *);
240 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *);
241 extern const struct pnfs_layoutdriver_type *pnfs_find_layoutdriver(u32 id);
242 extern void pnfs_put_layoutdriver(const struct pnfs_layoutdriver_type *ld);
245 extern size_t max_response_pages(struct nfs_server *server);
246 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server,
247 struct pnfs_device *dev,
248 const struct cred *cred);
249 extern struct pnfs_layout_segment *
250 nfs4_proc_layoutget(struct nfs4_layoutget *lgp,
251 struct nfs4_exception *exception);
252 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync);
255 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo);
256 void pnfs_put_lseg(struct pnfs_layout_segment *lseg);
258 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *);
259 void unset_pnfs_layoutdriver(struct nfs_server *);
260 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio, struct nfs_page *req);
261 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *);
262 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc);
263 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
264 struct nfs_page *req, u64 wb_size);
265 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *);
266 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc);
267 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
268 struct nfs_page *prev, struct nfs_page *req);
269 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg);
270 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp);
271 void pnfs_layoutget_free(struct nfs4_layoutget *lgp);
272 void pnfs_free_lseg_list(struct list_head *tmp_list);
273 void pnfs_destroy_layout(struct nfs_inode *);
274 void pnfs_destroy_layout_final(struct nfs_inode *);
275 void pnfs_destroy_all_layouts(struct nfs_client *);
276 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp,
277 struct nfs_fsid *fsid,
279 int pnfs_destroy_layouts_byclid(struct nfs_client *clp,
281 bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst,
282 struct pnfs_layout_range *dst_range,
283 struct inode *inode);
284 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo);
285 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo,
286 const nfs4_stateid *new,
287 const struct cred *cred,
288 bool update_barrier);
289 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo,
290 struct list_head *tmp_list,
291 const struct pnfs_layout_range *recall_range,
293 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo,
294 struct list_head *tmp_list,
295 const struct pnfs_layout_range *recall_range,
297 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo,
298 struct list_head *lseg_list);
299 bool pnfs_roc(struct inode *ino,
300 struct nfs4_layoutreturn_args *args,
301 struct nfs4_layoutreturn_res *res,
302 const struct cred *cred);
303 int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp,
304 struct nfs4_layoutreturn_res **respp, int *ret);
305 void pnfs_roc_release(struct nfs4_layoutreturn_args *args,
306 struct nfs4_layoutreturn_res *res,
308 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task);
309 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t);
310 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data);
311 int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
312 int pnfs_generic_sync(struct inode *inode, bool datasync);
313 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync);
314 int _pnfs_return_layout(struct inode *);
315 int pnfs_commit_and_return_layout(struct inode *);
316 void pnfs_ld_write_done(struct nfs_pgio_header *);
317 void pnfs_ld_read_done(struct nfs_pgio_header *);
318 void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx);
319 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
320 struct nfs_open_context *ctx,
323 enum pnfs_iomode iomode,
326 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo,
327 const nfs4_stateid *arg_stateid,
328 const struct pnfs_layout_range *range,
329 const nfs4_stateid *stateid);
331 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo,
332 struct pnfs_layout_segment *lseg,
333 bool (*is_after)(const struct pnfs_layout_range *lseg_range,
334 const struct pnfs_layout_range *old),
335 bool (*do_merge)(struct pnfs_layout_segment *lseg,
336 struct pnfs_layout_segment *old),
337 struct list_head *free_me);
339 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp);
340 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *);
341 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *);
342 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
343 void pnfs_error_mark_layout_for_return(struct inode *inode,
344 struct pnfs_layout_segment *lseg);
345 void pnfs_layout_return_unused_byclid(struct nfs_client *clp,
346 enum pnfs_iomode iomode);
348 /* nfs4_deviceid_flags */
350 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */
351 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */
352 NFS_DEVICEID_NOCACHE, /* device may not be cached */
356 struct nfs4_deviceid_node {
357 struct hlist_node node;
358 struct hlist_node tmpnode;
359 const struct pnfs_layoutdriver_type *ld;
360 const struct nfs_client *nfs_client;
362 unsigned long timestamp_unavailable;
363 struct nfs4_deviceid deviceid;
368 struct nfs4_deviceid_node *
369 nfs4_find_get_deviceid(struct nfs_server *server,
370 const struct nfs4_deviceid *id, const struct cred *cred,
372 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *);
373 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *,
374 const struct nfs4_deviceid *);
375 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
376 void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node);
377 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
378 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
379 void nfs4_deviceid_purge_client(const struct nfs_client *);
382 struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags);
383 void pnfs_free_commit_array(struct pnfs_commit_array *p);
384 struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *,
385 struct pnfs_commit_array *,
386 struct pnfs_layout_segment *);
388 void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo,
389 struct pnfs_layout_segment *lseg);
390 void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo);
392 void pnfs_generic_clear_request_commit(struct nfs_page *req,
393 struct nfs_commit_info *cinfo);
394 void pnfs_generic_commit_release(void *calldata);
395 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data);
396 void pnfs_generic_rw_release(void *data);
397 void pnfs_generic_recover_commit_reqs(struct list_head *dst,
398 struct nfs_commit_info *cinfo);
399 struct nfs_page *pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo,
400 struct folio *folio);
401 int pnfs_generic_commit_pagelist(struct inode *inode,
402 struct list_head *mds_pages,
404 struct nfs_commit_info *cinfo,
405 int (*initiate_commit)(struct nfs_commit_data *data,
407 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max);
408 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data);
409 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds);
410 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs,
412 void nfs4_pnfs_v3_ds_connect_unload(void);
413 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
414 struct nfs4_deviceid_node *devid, unsigned int timeo,
415 unsigned int retrans, u32 version, u32 minor_version);
416 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
417 struct xdr_stream *xdr,
419 void pnfs_layout_mark_request_commit(struct nfs_page *req,
420 struct pnfs_layout_segment *lseg,
421 struct nfs_commit_info *cinfo,
423 void pnfs_lgopen_prepare(struct nfs4_opendata *data,
424 struct nfs_open_context *ctx);
425 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp,
426 struct nfs_open_context *ctx);
427 void nfs4_lgopen_release(struct nfs4_layoutget *lgp);
429 static inline bool nfs_have_layout(struct inode *inode)
431 return NFS_I(inode)->layout != NULL;
434 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
436 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0;
439 static inline struct nfs4_deviceid_node *
440 nfs4_get_deviceid(struct nfs4_deviceid_node *d)
446 static inline struct pnfs_layout_segment *
447 pnfs_get_lseg(struct pnfs_layout_segment *lseg)
450 refcount_inc(&lseg->pls_refcount);
451 smp_mb__after_atomic();
457 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg)
459 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0;
462 /* Return true if a layout driver is being used for this mountpoint */
463 static inline int pnfs_enabled_sb(struct nfs_server *nfss)
465 return nfss->pnfs_curr_ld != NULL;
469 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
470 struct nfs_commit_info *cinfo)
472 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
474 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0)
475 return PNFS_NOT_ATTEMPTED;
476 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo);
479 static inline struct pnfs_ds_commit_info *
480 pnfs_get_ds_info(struct inode *inode)
482 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
484 if (ld == NULL || ld->get_ds_info == NULL)
486 return ld->get_ds_info(inode);
490 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
492 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode);
493 if (inode_cinfo != NULL)
494 fl_cinfo->ops = inode_cinfo->ops;
498 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo)
500 INIT_LIST_HEAD(&fl_cinfo->commits);
501 fl_cinfo->ops = NULL;
505 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
507 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL)
508 fl_cinfo->ops->release_ds_info(fl_cinfo, inode);
512 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node)
514 set_bit(NFS_DEVICEID_INVALID, &node->flags);
518 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
519 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
521 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
523 if (!lseg || !fl_cinfo->ops || !fl_cinfo->ops->mark_request_commit)
525 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx);
530 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
532 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
534 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit)
536 fl_cinfo->ops->clear_request_commit(req, cinfo);
541 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
544 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
546 if (!fl_cinfo || fl_cinfo->nwritten == 0)
548 return fl_cinfo->ops->scan_commit_lists(cinfo, max);
552 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo)
554 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
556 if (fl_cinfo && fl_cinfo->nwritten != 0)
557 fl_cinfo->ops->recover_commit_reqs(head, cinfo);
560 static inline struct nfs_page *
561 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
564 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds;
566 if (!fl_cinfo->ops || !fl_cinfo->ops->search_commit_reqs)
568 return fl_cinfo->ops->search_commit_reqs(cinfo, folio);
571 /* Should the pNFS client commit and return the layout upon a setattr */
573 pnfs_ld_layoutret_on_setattr(struct inode *inode)
575 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
577 return NFS_SERVER(inode)->pnfs_curr_ld->flags &
578 PNFS_LAYOUTRET_ON_SETATTR;
582 pnfs_ld_read_whole_page(struct inode *inode)
584 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
586 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE;
590 pnfs_sync_inode(struct inode *inode, bool datasync)
592 if (!pnfs_enabled_sb(NFS_SERVER(inode)))
594 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync);
598 pnfs_layoutcommit_outstanding(struct inode *inode)
600 struct nfs_inode *nfsi = NFS_I(inode);
602 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 ||
603 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0;
606 static inline int pnfs_return_layout(struct inode *ino)
608 struct nfs_inode *nfsi = NFS_I(ino);
609 struct nfs_server *nfss = NFS_SERVER(ino);
611 if (pnfs_enabled_sb(nfss) && nfsi->layout) {
612 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags);
613 return _pnfs_return_layout(ino);
620 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
621 struct nfs_server *nfss)
623 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld &&
624 nfss->pnfs_curr_ld->id == src->l_type);
628 pnfs_calc_offset_end(u64 offset, u64 len)
630 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset)
631 return NFS4_MAX_UINT64;
632 return offset + len - 1;
636 pnfs_calc_offset_length(u64 offset, u64 end)
638 if (end == NFS4_MAX_UINT64 || end <= offset)
639 return NFS4_MAX_UINT64;
640 return 1 + end - offset;
644 pnfs_copy_range(struct pnfs_layout_range *dst,
645 const struct pnfs_layout_range *src)
647 memcpy(dst, src, sizeof(*dst));
651 pnfs_end_offset(u64 start, u64 len)
653 if (NFS4_MAX_UINT64 - start <= len)
654 return NFS4_MAX_UINT64;
659 * Are 2 ranges intersecting?
661 * [----------------------------------)
666 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2)
668 return (end1 == NFS4_MAX_UINT64 || start2 < end1) &&
669 (end2 == NFS4_MAX_UINT64 || start1 < end2);
673 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1,
674 const struct pnfs_layout_range *l2)
676 u64 end1 = pnfs_end_offset(l1->offset, l1->length);
677 u64 end2 = pnfs_end_offset(l2->offset, l2->length);
679 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2);
683 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req)
685 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length);
686 u64 req_last = req_offset(req) + req->wb_bytes;
688 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last,
689 req_offset(req), req_last);
692 static inline void pnfs_lseg_cancel_io(struct nfs_server *server,
693 struct pnfs_layout_segment *lseg)
695 if (server->pnfs_curr_ld->cancel_io)
696 server->pnfs_curr_ld->cancel_io(lseg);
699 extern unsigned int layoutstats_timer;
702 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id);
704 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id)
708 #endif /* NFS_DEBUG */
709 #else /* CONFIG_NFS_V4_1 */
711 static inline bool nfs_have_layout(struct inode *inode)
716 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
720 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi)
724 static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi)
728 static inline struct pnfs_layout_segment *
729 pnfs_get_lseg(struct pnfs_layout_segment *lseg)
734 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg)
738 static inline int pnfs_return_layout(struct inode *ino)
743 static inline int pnfs_commit_and_return_layout(struct inode *inode)
749 pnfs_ld_layoutret_on_setattr(struct inode *inode)
755 pnfs_ld_read_whole_page(struct inode *inode)
761 pnfs_sync_inode(struct inode *inode, bool datasync)
767 pnfs_layoutcommit_outstanding(struct inode *inode)
774 pnfs_roc(struct inode *ino,
775 struct nfs4_layoutreturn_args *args,
776 struct nfs4_layoutreturn_res *res,
777 const struct cred *cred)
783 pnfs_roc_done(struct rpc_task *task,
784 struct nfs4_layoutreturn_args **argpp,
785 struct nfs4_layoutreturn_res **respp,
792 pnfs_roc_release(struct nfs4_layoutreturn_args *args,
793 struct nfs4_layoutreturn_res *res,
799 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task)
804 static inline void set_pnfs_layoutdriver(struct nfs_server *s,
805 const struct nfs_fh *mntfh,
806 struct nfs_fsinfo *fsinfo)
810 static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
815 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how,
816 struct nfs_commit_info *cinfo)
818 return PNFS_NOT_ATTEMPTED;
821 static inline struct pnfs_ds_commit_info *
822 pnfs_get_ds_info(struct inode *inode)
828 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
833 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo)
838 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode)
843 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
844 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
850 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
856 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo,
863 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo)
867 static inline struct nfs_page *
868 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo,
874 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync)
880 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src,
881 struct nfs_server *nfss)
886 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
891 static inline void nfs4_pnfs_v3_ds_connect_unload(void)
895 static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst,
896 struct pnfs_layout_range *dst_range,
902 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data,
903 struct nfs_open_context *ctx)
907 static inline void pnfs_parse_lgopen(struct inode *ino,
908 struct nfs4_layoutget *lgp,
909 struct nfs_open_context *ctx)
913 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp)
917 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo)
922 #endif /* CONFIG_NFS_V4_1 */
924 #if IS_ENABLED(CONFIG_NFS_V4_2)
925 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags);
928 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags)
934 #endif /* FS_NFS_PNFS_H */