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_layoutreturn_refresh_stateid(nfs4_stateid *dst, 263 struct pnfs_layout_range *dst_range, 264 struct inode *inode); 265 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 266 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 267 const nfs4_stateid *new, 268 bool update_barrier); 269 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 270 struct list_head *tmp_list, 271 const struct pnfs_layout_range *recall_range, 272 u32 seq); 273 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 274 struct list_head *tmp_list, 275 const struct pnfs_layout_range *recall_range, 276 u32 seq); 277 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 278 struct list_head *lseg_list); 279 bool pnfs_roc(struct inode *ino, 280 struct nfs4_layoutreturn_args *args, 281 struct nfs4_layoutreturn_res *res, 282 const struct rpc_cred *cred); 283 void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 284 struct nfs4_layoutreturn_res *res, 285 int ret); 286 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 287 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 288 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 289 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 290 int pnfs_generic_sync(struct inode *inode, bool datasync); 291 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 292 int _pnfs_return_layout(struct inode *); 293 int pnfs_commit_and_return_layout(struct inode *); 294 void pnfs_ld_write_done(struct nfs_pgio_header *); 295 void pnfs_ld_read_done(struct nfs_pgio_header *); 296 void pnfs_read_resend_pnfs(struct nfs_pgio_header *); 297 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 298 struct nfs_open_context *ctx, 299 loff_t pos, 300 u64 count, 301 enum pnfs_iomode iomode, 302 bool strict_iomode, 303 gfp_t gfp_flags); 304 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 305 const nfs4_stateid *arg_stateid, 306 const struct pnfs_layout_range *range, 307 const nfs4_stateid *stateid); 308 309 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 310 struct pnfs_layout_segment *lseg, 311 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 312 const struct pnfs_layout_range *old), 313 bool (*do_merge)(struct pnfs_layout_segment *lseg, 314 struct pnfs_layout_segment *old), 315 struct list_head *free_me); 316 317 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 318 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 319 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 320 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 321 void pnfs_error_mark_layout_for_return(struct inode *inode, 322 struct pnfs_layout_segment *lseg); 323 /* nfs4_deviceid_flags */ 324 enum { 325 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 326 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 327 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 328 }; 329 330 /* pnfs_dev.c */ 331 struct nfs4_deviceid_node { 332 struct hlist_node node; 333 struct hlist_node tmpnode; 334 const struct pnfs_layoutdriver_type *ld; 335 const struct nfs_client *nfs_client; 336 unsigned long flags; 337 unsigned long timestamp_unavailable; 338 struct nfs4_deviceid deviceid; 339 struct rcu_head rcu; 340 atomic_t ref; 341 }; 342 343 struct nfs4_deviceid_node * 344 nfs4_find_get_deviceid(struct nfs_server *server, 345 const struct nfs4_deviceid *id, struct rpc_cred *cred, 346 gfp_t gfp_mask); 347 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 348 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 349 const struct nfs4_deviceid *); 350 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 351 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 352 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 353 void nfs4_deviceid_purge_client(const struct nfs_client *); 354 355 /* pnfs_nfs.c */ 356 void pnfs_generic_clear_request_commit(struct nfs_page *req, 357 struct nfs_commit_info *cinfo); 358 void pnfs_generic_commit_release(void *calldata); 359 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 360 void pnfs_generic_rw_release(void *data); 361 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 362 struct nfs_commit_info *cinfo); 363 int pnfs_generic_commit_pagelist(struct inode *inode, 364 struct list_head *mds_pages, 365 int how, 366 struct nfs_commit_info *cinfo, 367 int (*initiate_commit)(struct nfs_commit_data *data, 368 int how)); 369 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 370 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 371 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 372 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 373 gfp_t gfp_flags); 374 void nfs4_pnfs_v3_ds_connect_unload(void); 375 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 376 struct nfs4_deviceid_node *devid, unsigned int timeo, 377 unsigned int retrans, u32 version, u32 minor_version); 378 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 379 struct xdr_stream *xdr, 380 gfp_t gfp_flags); 381 void pnfs_layout_mark_request_commit(struct nfs_page *req, 382 struct pnfs_layout_segment *lseg, 383 struct nfs_commit_info *cinfo, 384 u32 ds_commit_idx); 385 void pnfs_lgopen_prepare(struct nfs4_opendata *data, 386 struct nfs_open_context *ctx); 387 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, 388 struct nfs_open_context *ctx); 389 void nfs4_lgopen_release(struct nfs4_layoutget *lgp); 390 391 static inline bool nfs_have_layout(struct inode *inode) 392 { 393 return NFS_I(inode)->layout != NULL; 394 } 395 396 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 397 { 398 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 399 } 400 401 static inline struct nfs4_deviceid_node * 402 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 403 { 404 atomic_inc(&d->ref); 405 return d; 406 } 407 408 static inline struct pnfs_layout_segment * 409 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 410 { 411 if (lseg) { 412 refcount_inc(&lseg->pls_refcount); 413 smp_mb__after_atomic(); 414 } 415 return lseg; 416 } 417 418 static inline bool 419 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 420 { 421 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 422 } 423 424 /* Return true if a layout driver is being used for this mountpoint */ 425 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 426 { 427 return nfss->pnfs_curr_ld != NULL; 428 } 429 430 static inline int 431 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 432 struct nfs_commit_info *cinfo) 433 { 434 if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) 435 return PNFS_NOT_ATTEMPTED; 436 return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); 437 } 438 439 static inline struct pnfs_ds_commit_info * 440 pnfs_get_ds_info(struct inode *inode) 441 { 442 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 443 444 if (ld == NULL || ld->get_ds_info == NULL) 445 return NULL; 446 return ld->get_ds_info(inode); 447 } 448 449 static inline void 450 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 451 { 452 set_bit(NFS_DEVICEID_INVALID, &node->flags); 453 } 454 455 static inline bool 456 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 457 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 458 { 459 struct inode *inode = d_inode(req->wb_context->dentry); 460 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 461 462 if (lseg == NULL || ld->mark_request_commit == NULL) 463 return false; 464 ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 465 return true; 466 } 467 468 static inline bool 469 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 470 { 471 struct inode *inode = d_inode(req->wb_context->dentry); 472 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 473 474 if (ld == NULL || ld->clear_request_commit == NULL) 475 return false; 476 ld->clear_request_commit(req, cinfo); 477 return true; 478 } 479 480 static inline int 481 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 482 int max) 483 { 484 if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) 485 return 0; 486 else 487 return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); 488 } 489 490 static inline struct nfs_page * 491 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 492 struct page *page) 493 { 494 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 495 496 if (ld == NULL || ld->search_commit_reqs == NULL) 497 return NULL; 498 return ld->search_commit_reqs(cinfo, page); 499 } 500 501 /* Should the pNFS client commit and return the layout upon a setattr */ 502 static inline bool 503 pnfs_ld_layoutret_on_setattr(struct inode *inode) 504 { 505 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 506 return false; 507 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 508 PNFS_LAYOUTRET_ON_SETATTR; 509 } 510 511 static inline bool 512 pnfs_ld_read_whole_page(struct inode *inode) 513 { 514 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 515 return false; 516 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 517 } 518 519 static inline int 520 pnfs_sync_inode(struct inode *inode, bool datasync) 521 { 522 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 523 return 0; 524 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 525 } 526 527 static inline bool 528 pnfs_layoutcommit_outstanding(struct inode *inode) 529 { 530 struct nfs_inode *nfsi = NFS_I(inode); 531 532 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 533 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 534 } 535 536 static inline int pnfs_return_layout(struct inode *ino) 537 { 538 struct nfs_inode *nfsi = NFS_I(ino); 539 struct nfs_server *nfss = NFS_SERVER(ino); 540 541 if (pnfs_enabled_sb(nfss) && nfsi->layout) { 542 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags); 543 return _pnfs_return_layout(ino); 544 } 545 546 return 0; 547 } 548 549 static inline bool 550 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 551 struct nfs_server *nfss) 552 { 553 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 554 nfss->pnfs_curr_ld->id == src->l_type); 555 } 556 557 static inline u64 558 pnfs_calc_offset_end(u64 offset, u64 len) 559 { 560 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 561 return NFS4_MAX_UINT64; 562 return offset + len - 1; 563 } 564 565 static inline u64 566 pnfs_calc_offset_length(u64 offset, u64 end) 567 { 568 if (end == NFS4_MAX_UINT64 || end <= offset) 569 return NFS4_MAX_UINT64; 570 return 1 + end - offset; 571 } 572 573 static inline void 574 pnfs_copy_range(struct pnfs_layout_range *dst, 575 const struct pnfs_layout_range *src) 576 { 577 memcpy(dst, src, sizeof(*dst)); 578 } 579 580 static inline u64 581 pnfs_end_offset(u64 start, u64 len) 582 { 583 if (NFS4_MAX_UINT64 - start <= len) 584 return NFS4_MAX_UINT64; 585 return start + len; 586 } 587 588 /* 589 * Are 2 ranges intersecting? 590 * start1 end1 591 * [----------------------------------) 592 * start2 end2 593 * [----------------) 594 */ 595 static inline bool 596 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 597 { 598 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 599 (end2 == NFS4_MAX_UINT64 || start1 < end2); 600 } 601 602 static inline bool 603 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 604 const struct pnfs_layout_range *l2) 605 { 606 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 607 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 608 609 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 610 } 611 612 static inline bool 613 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 614 { 615 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 616 u64 req_last = req_offset(req) + req->wb_bytes; 617 618 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 619 req_offset(req), req_last); 620 } 621 622 extern unsigned int layoutstats_timer; 623 624 #ifdef NFS_DEBUG 625 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 626 #else 627 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 628 { 629 } 630 631 #endif /* NFS_DEBUG */ 632 #else /* CONFIG_NFS_V4_1 */ 633 634 static inline bool nfs_have_layout(struct inode *inode) 635 { 636 return false; 637 } 638 639 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 640 { 641 } 642 643 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 644 { 645 } 646 647 static inline struct pnfs_layout_segment * 648 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 649 { 650 return NULL; 651 } 652 653 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 654 { 655 } 656 657 static inline int pnfs_return_layout(struct inode *ino) 658 { 659 return 0; 660 } 661 662 static inline int pnfs_commit_and_return_layout(struct inode *inode) 663 { 664 return 0; 665 } 666 667 static inline bool 668 pnfs_ld_layoutret_on_setattr(struct inode *inode) 669 { 670 return false; 671 } 672 673 static inline bool 674 pnfs_ld_read_whole_page(struct inode *inode) 675 { 676 return false; 677 } 678 679 static inline int 680 pnfs_sync_inode(struct inode *inode, bool datasync) 681 { 682 return 0; 683 } 684 685 static inline bool 686 pnfs_layoutcommit_outstanding(struct inode *inode) 687 { 688 return false; 689 } 690 691 692 static inline bool 693 pnfs_roc(struct inode *ino, 694 struct nfs4_layoutreturn_args *args, 695 struct nfs4_layoutreturn_res *res, 696 const struct rpc_cred *cred) 697 { 698 return false; 699 } 700 701 static inline void 702 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 703 struct nfs4_layoutreturn_res *res, 704 int ret) 705 { 706 } 707 708 static inline bool 709 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 710 { 711 return false; 712 } 713 714 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 715 const struct nfs_fh *mntfh, 716 struct nfs_fsinfo *fsinfo) 717 { 718 } 719 720 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 721 { 722 } 723 724 static inline int 725 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 726 struct nfs_commit_info *cinfo) 727 { 728 return PNFS_NOT_ATTEMPTED; 729 } 730 731 static inline struct pnfs_ds_commit_info * 732 pnfs_get_ds_info(struct inode *inode) 733 { 734 return NULL; 735 } 736 737 static inline bool 738 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 739 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 740 { 741 return false; 742 } 743 744 static inline bool 745 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 746 { 747 return false; 748 } 749 750 static inline int 751 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 752 int max) 753 { 754 return 0; 755 } 756 757 static inline struct nfs_page * 758 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 759 struct page *page) 760 { 761 return NULL; 762 } 763 764 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 765 { 766 return 0; 767 } 768 769 static inline bool 770 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 771 struct nfs_server *nfss) 772 { 773 return false; 774 } 775 776 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 777 { 778 return NULL; 779 } 780 781 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 782 { 783 } 784 785 static inline bool nfs4_layoutreturn_refresh_stateid(nfs4_stateid *dst, 786 struct pnfs_layout_range *dst_range, 787 struct inode *inode) 788 { 789 return false; 790 } 791 792 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 793 struct nfs_open_context *ctx) 794 { 795 } 796 797 static inline void pnfs_parse_lgopen(struct inode *ino, 798 struct nfs4_layoutget *lgp, 799 struct nfs_open_context *ctx) 800 { 801 } 802 803 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 804 { 805 } 806 807 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 808 { 809 return false; 810 } 811 812 #endif /* CONFIG_NFS_V4_1 */ 813 814 #if IS_ENABLED(CONFIG_NFS_V4_2) 815 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 816 #else 817 static inline int 818 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 819 { 820 return 0; 821 } 822 #endif 823 824 #endif /* FS_NFS_PNFS_H */ 825