1 /* 2 * pNFS client data structures. 3 * 4 * Copyright (c) 2002 5 * The Regents of the University of Michigan 6 * All Rights Reserved 7 * 8 * Dean Hildebrand <dhildebz@umich.edu> 9 * 10 * Permission is granted to use, copy, create derivative works, and 11 * redistribute this software and such derivative works for any purpose, 12 * so long as the name of the University of Michigan is not used in 13 * any advertising or publicity pertaining to the use or distribution 14 * of this software without specific, written prior authorization. If 15 * the above copyright notice or any other identification of the 16 * University of Michigan is included in any copy of any portion of 17 * this software, then the disclaimer below must also be included. 18 * 19 * This software is provided as is, without representation or warranty 20 * of any kind either express or implied, including without limitation 21 * the implied warranties of merchantability, fitness for a particular 22 * purpose, or noninfringement. The Regents of the University of 23 * Michigan shall not be liable for any damages, including special, 24 * indirect, incidental, or consequential damages, with respect to any 25 * claim arising out of or in connection with the use of the software, 26 * even if it has been or is hereafter advised of the possibility of 27 * such damages. 28 */ 29 30 #ifndef FS_NFS_PNFS_H 31 #define FS_NFS_PNFS_H 32 33 #include <linux/refcount.h> 34 #include <linux/nfs_fs.h> 35 #include <linux/nfs_page.h> 36 #include <linux/workqueue.h> 37 38 struct nfs4_opendata; 39 40 enum { 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 */ 46 }; 47 48 /* Individual ip address */ 49 struct nfs4_pnfs_ds_addr { 50 struct sockaddr_storage da_addr; 51 size_t da_addrlen; 52 struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 53 char *da_remotestr; /* human readable addr+port */ 54 }; 55 56 struct nfs4_pnfs_ds { 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; 61 refcount_t ds_count; 62 unsigned long ds_state; 63 #define NFS4DS_CONNECTING 0 /* ds is establishing connection */ 64 }; 65 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; 71 u32 pls_seq; 72 unsigned long pls_flags; 73 struct pnfs_layout_hdr *pls_layout; 74 }; 75 76 enum pnfs_try_status { 77 PNFS_ATTEMPTED = 0, 78 PNFS_NOT_ATTEMPTED = 1, 79 PNFS_TRY_AGAIN = 2, 80 }; 81 82 #ifdef CONFIG_NFS_V4_1 83 84 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" 85 86 /* 87 * Default data server connection timeout and retrans vaules. 88 * Set by module parameters dataserver_timeo and dataserver_retrans. 89 */ 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) 93 94 /* error codes for internal use */ 95 #define NFS4ERR_RESET_TO_MDS 12001 96 #define NFS4ERR_RESET_TO_PNFS 12002 97 98 enum { 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 }; 108 109 enum layoutdriver_policy_flags { 110 /* Should the pNFS client commit and return the layout upon truncate to 111 * a smaller size */ 112 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, 113 PNFS_LAYOUTRET_ON_ERROR = 1 << 1, 114 PNFS_READ_WHOLE_PAGE = 1 << 2, 115 PNFS_LAYOUTGET_ON_OPEN = 1 << 3, 116 }; 117 118 struct nfs4_deviceid_node; 119 120 /* Per-layout driver specific registration structure */ 121 struct pnfs_layoutdriver_type { 122 struct list_head pnfs_tblid; 123 const u32 id; 124 const char *name; 125 struct module *owner; 126 unsigned flags; 127 unsigned max_deviceinfo_size; 128 129 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); 130 int (*clear_layoutdriver) (struct nfs_server *); 131 132 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); 133 void (*free_layout_hdr) (struct pnfs_layout_hdr *); 134 135 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); 136 void (*free_lseg) (struct pnfs_layout_segment *lseg); 137 void (*add_lseg) (struct pnfs_layout_hdr *layoutid, 138 struct pnfs_layout_segment *lseg, 139 struct list_head *free_me); 140 141 void (*return_range) (struct pnfs_layout_hdr *lo, 142 struct pnfs_layout_range *range); 143 144 /* test for nfs page cache coalescing */ 145 const struct nfs_pageio_ops *pg_read_ops; 146 const struct nfs_pageio_ops *pg_write_ops; 147 148 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); 149 void (*mark_request_commit) (struct nfs_page *req, 150 struct pnfs_layout_segment *lseg, 151 struct nfs_commit_info *cinfo, 152 u32 ds_commit_idx); 153 void (*clear_request_commit) (struct nfs_page *req, 154 struct nfs_commit_info *cinfo); 155 int (*scan_commit_lists) (struct nfs_commit_info *cinfo, 156 int max); 157 void (*recover_commit_reqs) (struct list_head *list, 158 struct nfs_commit_info *cinfo); 159 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, 160 struct page *page); 161 int (*commit_pagelist)(struct inode *inode, 162 struct list_head *mds_pages, 163 int how, 164 struct nfs_commit_info *cinfo); 165 166 int (*sync)(struct inode *inode, bool datasync); 167 168 /* 169 * Return PNFS_ATTEMPTED to indicate the layout code has attempted 170 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS 171 */ 172 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); 173 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); 174 175 void (*free_deviceid_node) (struct nfs4_deviceid_node *); 176 struct nfs4_deviceid_node * (*alloc_deviceid_node) 177 (struct nfs_server *server, struct pnfs_device *pdev, 178 gfp_t gfp_flags); 179 180 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *); 181 182 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); 183 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); 184 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); 185 }; 186 187 struct pnfs_layout_hdr { 188 refcount_t plh_refcount; 189 atomic_t plh_outstanding; /* number of RPCs out */ 190 struct list_head plh_layouts; /* other client layouts */ 191 struct list_head plh_bulk_destroy; 192 struct list_head plh_segs; /* layout segments list */ 193 struct list_head plh_return_segs; /* invalid layout segments */ 194 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 195 unsigned long plh_retry_timestamp; 196 unsigned long plh_flags; 197 nfs4_stateid plh_stateid; 198 u32 plh_barrier; /* ignore lower seqids */ 199 u32 plh_return_seq; 200 enum pnfs_iomode plh_return_iomode; 201 loff_t plh_lwb; /* last write byte for layoutcommit */ 202 struct rpc_cred *plh_lc_cred; /* layoutcommit cred */ 203 struct inode *plh_inode; 204 }; 205 206 struct pnfs_device { 207 struct nfs4_deviceid dev_id; 208 unsigned int layout_type; 209 unsigned int mincount; 210 unsigned int maxcount; /* gdia_maxcount */ 211 struct page **pages; 212 unsigned int pgbase; 213 unsigned int pglen; /* reply buffer length */ 214 unsigned char nocache : 1;/* May not be cached */ 215 }; 216 217 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 218 219 struct pnfs_devicelist { 220 unsigned int eof; 221 unsigned int num_devs; 222 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 223 }; 224 225 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 226 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 227 228 /* nfs4proc.c */ 229 extern size_t max_response_pages(struct nfs_server *server); 230 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 231 struct pnfs_device *dev, 232 struct rpc_cred *cred); 233 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout); 234 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); 235 236 /* pnfs.c */ 237 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 238 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 239 240 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); 241 void unset_pnfs_layoutdriver(struct nfs_server *); 242 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio); 243 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 244 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 245 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 246 struct nfs_page *req, u64 wb_size); 247 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 248 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 249 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 250 struct nfs_page *prev, struct nfs_page *req); 251 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 252 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 253 void pnfs_layoutget_free(struct nfs4_layoutget *lgp); 254 void pnfs_free_lseg_list(struct list_head *tmp_list); 255 void pnfs_destroy_layout(struct nfs_inode *); 256 void pnfs_destroy_all_layouts(struct nfs_client *); 257 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, 258 struct nfs_fsid *fsid, 259 bool is_recall); 260 int pnfs_destroy_layouts_byclid(struct nfs_client *clp, 261 bool is_recall); 262 bool nfs4_refresh_layout_stateid(nfs4_stateid *dst, struct inode *inode); 263 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 264 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 265 const nfs4_stateid *new, 266 bool update_barrier); 267 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 268 struct list_head *tmp_list, 269 const struct pnfs_layout_range *recall_range, 270 u32 seq); 271 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 272 struct list_head *tmp_list, 273 const struct pnfs_layout_range *recall_range, 274 u32 seq); 275 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 276 struct list_head *lseg_list); 277 bool pnfs_roc(struct inode *ino, 278 struct nfs4_layoutreturn_args *args, 279 struct nfs4_layoutreturn_res *res, 280 const struct rpc_cred *cred); 281 void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 282 struct nfs4_layoutreturn_res *res, 283 int ret); 284 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 285 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 286 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 287 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 288 int pnfs_generic_sync(struct inode *inode, bool datasync); 289 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 290 int _pnfs_return_layout(struct inode *); 291 int pnfs_commit_and_return_layout(struct inode *); 292 void pnfs_ld_write_done(struct nfs_pgio_header *); 293 void pnfs_ld_read_done(struct nfs_pgio_header *); 294 void pnfs_read_resend_pnfs(struct nfs_pgio_header *); 295 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 296 struct nfs_open_context *ctx, 297 loff_t pos, 298 u64 count, 299 enum pnfs_iomode iomode, 300 bool strict_iomode, 301 gfp_t gfp_flags); 302 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 303 const nfs4_stateid *arg_stateid, 304 const struct pnfs_layout_range *range, 305 const nfs4_stateid *stateid); 306 307 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 308 struct pnfs_layout_segment *lseg, 309 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 310 const struct pnfs_layout_range *old), 311 bool (*do_merge)(struct pnfs_layout_segment *lseg, 312 struct pnfs_layout_segment *old), 313 struct list_head *free_me); 314 315 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 316 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 317 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 318 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 319 void pnfs_error_mark_layout_for_return(struct inode *inode, 320 struct pnfs_layout_segment *lseg); 321 /* nfs4_deviceid_flags */ 322 enum { 323 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 324 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 325 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 326 }; 327 328 /* pnfs_dev.c */ 329 struct nfs4_deviceid_node { 330 struct hlist_node node; 331 struct hlist_node tmpnode; 332 const struct pnfs_layoutdriver_type *ld; 333 const struct nfs_client *nfs_client; 334 unsigned long flags; 335 unsigned long timestamp_unavailable; 336 struct nfs4_deviceid deviceid; 337 struct rcu_head rcu; 338 atomic_t ref; 339 }; 340 341 struct nfs4_deviceid_node * 342 nfs4_find_get_deviceid(struct nfs_server *server, 343 const struct nfs4_deviceid *id, struct rpc_cred *cred, 344 gfp_t gfp_mask); 345 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 346 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 347 const struct nfs4_deviceid *); 348 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 349 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 350 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 351 void nfs4_deviceid_purge_client(const struct nfs_client *); 352 353 /* pnfs_nfs.c */ 354 void pnfs_generic_clear_request_commit(struct nfs_page *req, 355 struct nfs_commit_info *cinfo); 356 void pnfs_generic_commit_release(void *calldata); 357 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 358 void pnfs_generic_rw_release(void *data); 359 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 360 struct nfs_commit_info *cinfo); 361 int pnfs_generic_commit_pagelist(struct inode *inode, 362 struct list_head *mds_pages, 363 int how, 364 struct nfs_commit_info *cinfo, 365 int (*initiate_commit)(struct nfs_commit_data *data, 366 int how)); 367 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 368 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 369 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 370 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 371 gfp_t gfp_flags); 372 void nfs4_pnfs_v3_ds_connect_unload(void); 373 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 374 struct nfs4_deviceid_node *devid, unsigned int timeo, 375 unsigned int retrans, u32 version, u32 minor_version); 376 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 377 struct xdr_stream *xdr, 378 gfp_t gfp_flags); 379 void pnfs_layout_mark_request_commit(struct nfs_page *req, 380 struct pnfs_layout_segment *lseg, 381 struct nfs_commit_info *cinfo, 382 u32 ds_commit_idx); 383 void pnfs_lgopen_prepare(struct nfs4_opendata *data, 384 struct nfs_open_context *ctx); 385 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, 386 struct nfs_open_context *ctx); 387 void nfs4_lgopen_release(struct nfs4_layoutget *lgp); 388 389 static inline bool nfs_have_layout(struct inode *inode) 390 { 391 return NFS_I(inode)->layout != NULL; 392 } 393 394 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 395 { 396 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 397 } 398 399 static inline struct nfs4_deviceid_node * 400 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 401 { 402 atomic_inc(&d->ref); 403 return d; 404 } 405 406 static inline struct pnfs_layout_segment * 407 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 408 { 409 if (lseg) { 410 refcount_inc(&lseg->pls_refcount); 411 smp_mb__after_atomic(); 412 } 413 return lseg; 414 } 415 416 static inline bool 417 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 418 { 419 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 420 } 421 422 /* Return true if a layout driver is being used for this mountpoint */ 423 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 424 { 425 return nfss->pnfs_curr_ld != NULL; 426 } 427 428 static inline int 429 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 430 struct nfs_commit_info *cinfo) 431 { 432 if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) 433 return PNFS_NOT_ATTEMPTED; 434 return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); 435 } 436 437 static inline struct pnfs_ds_commit_info * 438 pnfs_get_ds_info(struct inode *inode) 439 { 440 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 441 442 if (ld == NULL || ld->get_ds_info == NULL) 443 return NULL; 444 return ld->get_ds_info(inode); 445 } 446 447 static inline void 448 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 449 { 450 set_bit(NFS_DEVICEID_INVALID, &node->flags); 451 } 452 453 static inline bool 454 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 455 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 456 { 457 struct inode *inode = d_inode(req->wb_context->dentry); 458 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 459 460 if (lseg == NULL || ld->mark_request_commit == NULL) 461 return false; 462 ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 463 return true; 464 } 465 466 static inline bool 467 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 468 { 469 struct inode *inode = d_inode(req->wb_context->dentry); 470 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 471 472 if (ld == NULL || ld->clear_request_commit == NULL) 473 return false; 474 ld->clear_request_commit(req, cinfo); 475 return true; 476 } 477 478 static inline int 479 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 480 int max) 481 { 482 if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) 483 return 0; 484 else 485 return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); 486 } 487 488 static inline struct nfs_page * 489 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 490 struct page *page) 491 { 492 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 493 494 if (ld == NULL || ld->search_commit_reqs == NULL) 495 return NULL; 496 return ld->search_commit_reqs(cinfo, page); 497 } 498 499 /* Should the pNFS client commit and return the layout upon a setattr */ 500 static inline bool 501 pnfs_ld_layoutret_on_setattr(struct inode *inode) 502 { 503 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 504 return false; 505 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 506 PNFS_LAYOUTRET_ON_SETATTR; 507 } 508 509 static inline bool 510 pnfs_ld_read_whole_page(struct inode *inode) 511 { 512 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 513 return false; 514 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 515 } 516 517 static inline int 518 pnfs_sync_inode(struct inode *inode, bool datasync) 519 { 520 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 521 return 0; 522 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 523 } 524 525 static inline bool 526 pnfs_layoutcommit_outstanding(struct inode *inode) 527 { 528 struct nfs_inode *nfsi = NFS_I(inode); 529 530 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 531 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 532 } 533 534 static inline int pnfs_return_layout(struct inode *ino) 535 { 536 struct nfs_inode *nfsi = NFS_I(ino); 537 struct nfs_server *nfss = NFS_SERVER(ino); 538 539 if (pnfs_enabled_sb(nfss) && nfsi->layout) { 540 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags); 541 return _pnfs_return_layout(ino); 542 } 543 544 return 0; 545 } 546 547 static inline bool 548 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 549 struct nfs_server *nfss) 550 { 551 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 552 nfss->pnfs_curr_ld->id == src->l_type); 553 } 554 555 static inline u64 556 pnfs_calc_offset_end(u64 offset, u64 len) 557 { 558 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 559 return NFS4_MAX_UINT64; 560 return offset + len - 1; 561 } 562 563 static inline u64 564 pnfs_calc_offset_length(u64 offset, u64 end) 565 { 566 if (end == NFS4_MAX_UINT64 || end <= offset) 567 return NFS4_MAX_UINT64; 568 return 1 + end - offset; 569 } 570 571 static inline void 572 pnfs_copy_range(struct pnfs_layout_range *dst, 573 const struct pnfs_layout_range *src) 574 { 575 memcpy(dst, src, sizeof(*dst)); 576 } 577 578 static inline u64 579 pnfs_end_offset(u64 start, u64 len) 580 { 581 if (NFS4_MAX_UINT64 - start <= len) 582 return NFS4_MAX_UINT64; 583 return start + len; 584 } 585 586 /* 587 * Are 2 ranges intersecting? 588 * start1 end1 589 * [----------------------------------) 590 * start2 end2 591 * [----------------) 592 */ 593 static inline bool 594 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 595 { 596 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 597 (end2 == NFS4_MAX_UINT64 || start1 < end2); 598 } 599 600 static inline bool 601 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 602 const struct pnfs_layout_range *l2) 603 { 604 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 605 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 606 607 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 608 } 609 610 static inline bool 611 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 612 { 613 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 614 u64 req_last = req_offset(req) + req->wb_bytes; 615 616 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 617 req_offset(req), req_last); 618 } 619 620 extern unsigned int layoutstats_timer; 621 622 #ifdef NFS_DEBUG 623 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 624 #else 625 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 626 { 627 } 628 629 #endif /* NFS_DEBUG */ 630 #else /* CONFIG_NFS_V4_1 */ 631 632 static inline bool nfs_have_layout(struct inode *inode) 633 { 634 return false; 635 } 636 637 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 638 { 639 } 640 641 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 642 { 643 } 644 645 static inline struct pnfs_layout_segment * 646 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 647 { 648 return NULL; 649 } 650 651 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 652 { 653 } 654 655 static inline int pnfs_return_layout(struct inode *ino) 656 { 657 return 0; 658 } 659 660 static inline int pnfs_commit_and_return_layout(struct inode *inode) 661 { 662 return 0; 663 } 664 665 static inline bool 666 pnfs_ld_layoutret_on_setattr(struct inode *inode) 667 { 668 return false; 669 } 670 671 static inline bool 672 pnfs_ld_read_whole_page(struct inode *inode) 673 { 674 return false; 675 } 676 677 static inline int 678 pnfs_sync_inode(struct inode *inode, bool datasync) 679 { 680 return 0; 681 } 682 683 static inline bool 684 pnfs_layoutcommit_outstanding(struct inode *inode) 685 { 686 return false; 687 } 688 689 690 static inline bool 691 pnfs_roc(struct inode *ino, 692 struct nfs4_layoutreturn_args *args, 693 struct nfs4_layoutreturn_res *res, 694 const struct rpc_cred *cred) 695 { 696 return false; 697 } 698 699 static inline void 700 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 701 struct nfs4_layoutreturn_res *res, 702 int ret) 703 { 704 } 705 706 static inline bool 707 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 708 { 709 return false; 710 } 711 712 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 713 const struct nfs_fh *mntfh, 714 struct nfs_fsinfo *fsinfo) 715 { 716 } 717 718 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 719 { 720 } 721 722 static inline int 723 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 724 struct nfs_commit_info *cinfo) 725 { 726 return PNFS_NOT_ATTEMPTED; 727 } 728 729 static inline struct pnfs_ds_commit_info * 730 pnfs_get_ds_info(struct inode *inode) 731 { 732 return NULL; 733 } 734 735 static inline bool 736 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 737 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 738 { 739 return false; 740 } 741 742 static inline bool 743 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 744 { 745 return false; 746 } 747 748 static inline int 749 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 750 int max) 751 { 752 return 0; 753 } 754 755 static inline struct nfs_page * 756 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 757 struct page *page) 758 { 759 return NULL; 760 } 761 762 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 763 { 764 return 0; 765 } 766 767 static inline bool 768 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 769 struct nfs_server *nfss) 770 { 771 return false; 772 } 773 774 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 775 { 776 return NULL; 777 } 778 779 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 780 { 781 } 782 783 static inline bool nfs4_refresh_layout_stateid(nfs4_stateid *dst, 784 struct inode *inode) 785 { 786 return false; 787 } 788 789 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 790 struct nfs_open_context *ctx) 791 { 792 } 793 794 static inline void pnfs_parse_lgopen(struct inode *ino, 795 struct nfs4_layoutget *lgp, 796 struct nfs_open_context *ctx) 797 { 798 } 799 800 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 801 { 802 } 803 804 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 805 { 806 return false; 807 } 808 809 #endif /* CONFIG_NFS_V4_1 */ 810 811 #if IS_ENABLED(CONFIG_NFS_V4_2) 812 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 813 #else 814 static inline int 815 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 816 { 817 return 0; 818 } 819 #endif 820 821 #endif /* FS_NFS_PNFS_H */ 822