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 unsigned max_layoutget_response; 129 130 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); 131 int (*clear_layoutdriver) (struct nfs_server *); 132 133 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); 134 void (*free_layout_hdr) (struct pnfs_layout_hdr *); 135 136 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); 141 142 void (*return_range) (struct pnfs_layout_hdr *lo, 143 struct pnfs_layout_range *range); 144 145 /* test for nfs page cache coalescing */ 146 const struct nfs_pageio_ops *pg_read_ops; 147 const struct nfs_pageio_ops *pg_write_ops; 148 149 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, 153 u32 ds_commit_idx); 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, 157 int max); 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, 161 struct page *page); 162 int (*commit_pagelist)(struct inode *inode, 163 struct list_head *mds_pages, 164 int how, 165 struct nfs_commit_info *cinfo); 166 167 int (*sync)(struct inode *inode, bool datasync); 168 169 /* 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 172 */ 173 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); 174 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); 175 176 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, 179 gfp_t gfp_flags); 180 181 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *); 182 183 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); 186 }; 187 188 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 */ 200 u32 plh_return_seq; 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; 205 }; 206 207 struct pnfs_device { 208 struct nfs4_deviceid dev_id; 209 unsigned int layout_type; 210 unsigned int mincount; 211 unsigned int maxcount; /* gdia_maxcount */ 212 struct page **pages; 213 unsigned int pgbase; 214 unsigned int pglen; /* reply buffer length */ 215 unsigned char nocache : 1;/* May not be cached */ 216 }; 217 218 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 219 220 struct pnfs_devicelist { 221 unsigned int eof; 222 unsigned int num_devs; 223 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 224 }; 225 226 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 227 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 228 229 /* nfs4proc.c */ 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); 236 237 /* pnfs.c */ 238 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 239 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 240 241 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_all_layouts(struct nfs_client *); 258 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, 259 struct nfs_fsid *fsid, 260 bool is_recall); 261 int pnfs_destroy_layouts_byclid(struct nfs_client *clp, 262 bool is_recall); 263 bool nfs4_layoutreturn_refresh_stateid(nfs4_stateid *dst, 264 struct pnfs_layout_range *dst_range, 265 struct inode *inode); 266 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 267 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 268 const nfs4_stateid *new, 269 bool update_barrier); 270 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 271 struct list_head *tmp_list, 272 const struct pnfs_layout_range *recall_range, 273 u32 seq); 274 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 275 struct list_head *tmp_list, 276 const struct pnfs_layout_range *recall_range, 277 u32 seq); 278 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 279 struct list_head *lseg_list); 280 bool pnfs_roc(struct inode *ino, 281 struct nfs4_layoutreturn_args *args, 282 struct nfs4_layoutreturn_res *res, 283 const struct rpc_cred *cred); 284 void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 285 struct nfs4_layoutreturn_res *res, 286 int ret); 287 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 288 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 289 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 290 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 291 int pnfs_generic_sync(struct inode *inode, bool datasync); 292 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 293 int _pnfs_return_layout(struct inode *); 294 int pnfs_commit_and_return_layout(struct inode *); 295 void pnfs_ld_write_done(struct nfs_pgio_header *); 296 void pnfs_ld_read_done(struct nfs_pgio_header *); 297 void pnfs_read_resend_pnfs(struct nfs_pgio_header *); 298 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 299 struct nfs_open_context *ctx, 300 loff_t pos, 301 u64 count, 302 enum pnfs_iomode iomode, 303 bool strict_iomode, 304 gfp_t gfp_flags); 305 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 306 const nfs4_stateid *arg_stateid, 307 const struct pnfs_layout_range *range, 308 const nfs4_stateid *stateid); 309 310 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 311 struct pnfs_layout_segment *lseg, 312 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 313 const struct pnfs_layout_range *old), 314 bool (*do_merge)(struct pnfs_layout_segment *lseg, 315 struct pnfs_layout_segment *old), 316 struct list_head *free_me); 317 318 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 319 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 320 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 321 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 322 void pnfs_error_mark_layout_for_return(struct inode *inode, 323 struct pnfs_layout_segment *lseg); 324 /* nfs4_deviceid_flags */ 325 enum { 326 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 327 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 328 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 329 }; 330 331 /* pnfs_dev.c */ 332 struct nfs4_deviceid_node { 333 struct hlist_node node; 334 struct hlist_node tmpnode; 335 const struct pnfs_layoutdriver_type *ld; 336 const struct nfs_client *nfs_client; 337 unsigned long flags; 338 unsigned long timestamp_unavailable; 339 struct nfs4_deviceid deviceid; 340 struct rcu_head rcu; 341 atomic_t ref; 342 }; 343 344 struct nfs4_deviceid_node * 345 nfs4_find_get_deviceid(struct nfs_server *server, 346 const struct nfs4_deviceid *id, struct rpc_cred *cred, 347 gfp_t gfp_mask); 348 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 349 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 350 const struct nfs4_deviceid *); 351 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 352 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 353 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 354 void nfs4_deviceid_purge_client(const struct nfs_client *); 355 356 /* pnfs_nfs.c */ 357 void pnfs_generic_clear_request_commit(struct nfs_page *req, 358 struct nfs_commit_info *cinfo); 359 void pnfs_generic_commit_release(void *calldata); 360 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 361 void pnfs_generic_rw_release(void *data); 362 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 363 struct nfs_commit_info *cinfo); 364 int pnfs_generic_commit_pagelist(struct inode *inode, 365 struct list_head *mds_pages, 366 int how, 367 struct nfs_commit_info *cinfo, 368 int (*initiate_commit)(struct nfs_commit_data *data, 369 int how)); 370 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 371 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 372 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 373 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 374 gfp_t gfp_flags); 375 void nfs4_pnfs_v3_ds_connect_unload(void); 376 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 377 struct nfs4_deviceid_node *devid, unsigned int timeo, 378 unsigned int retrans, u32 version, u32 minor_version); 379 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 380 struct xdr_stream *xdr, 381 gfp_t gfp_flags); 382 void pnfs_layout_mark_request_commit(struct nfs_page *req, 383 struct pnfs_layout_segment *lseg, 384 struct nfs_commit_info *cinfo, 385 u32 ds_commit_idx); 386 void pnfs_lgopen_prepare(struct nfs4_opendata *data, 387 struct nfs_open_context *ctx); 388 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, 389 struct nfs_open_context *ctx); 390 void nfs4_lgopen_release(struct nfs4_layoutget *lgp); 391 392 static inline bool nfs_have_layout(struct inode *inode) 393 { 394 return NFS_I(inode)->layout != NULL; 395 } 396 397 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 398 { 399 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 400 } 401 402 static inline struct nfs4_deviceid_node * 403 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 404 { 405 atomic_inc(&d->ref); 406 return d; 407 } 408 409 static inline struct pnfs_layout_segment * 410 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 411 { 412 if (lseg) { 413 refcount_inc(&lseg->pls_refcount); 414 smp_mb__after_atomic(); 415 } 416 return lseg; 417 } 418 419 static inline bool 420 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 421 { 422 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 423 } 424 425 /* Return true if a layout driver is being used for this mountpoint */ 426 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 427 { 428 return nfss->pnfs_curr_ld != NULL; 429 } 430 431 static inline int 432 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 433 struct nfs_commit_info *cinfo) 434 { 435 if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) 436 return PNFS_NOT_ATTEMPTED; 437 return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); 438 } 439 440 static inline struct pnfs_ds_commit_info * 441 pnfs_get_ds_info(struct inode *inode) 442 { 443 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 444 445 if (ld == NULL || ld->get_ds_info == NULL) 446 return NULL; 447 return ld->get_ds_info(inode); 448 } 449 450 static inline void 451 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 452 { 453 set_bit(NFS_DEVICEID_INVALID, &node->flags); 454 } 455 456 static inline bool 457 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 458 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 459 { 460 struct inode *inode = d_inode(req->wb_context->dentry); 461 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 462 463 if (lseg == NULL || ld->mark_request_commit == NULL) 464 return false; 465 ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 466 return true; 467 } 468 469 static inline bool 470 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 471 { 472 struct inode *inode = d_inode(req->wb_context->dentry); 473 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 474 475 if (ld == NULL || ld->clear_request_commit == NULL) 476 return false; 477 ld->clear_request_commit(req, cinfo); 478 return true; 479 } 480 481 static inline int 482 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 483 int max) 484 { 485 if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) 486 return 0; 487 else 488 return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); 489 } 490 491 static inline struct nfs_page * 492 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 493 struct page *page) 494 { 495 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 496 497 if (ld == NULL || ld->search_commit_reqs == NULL) 498 return NULL; 499 return ld->search_commit_reqs(cinfo, page); 500 } 501 502 /* Should the pNFS client commit and return the layout upon a setattr */ 503 static inline bool 504 pnfs_ld_layoutret_on_setattr(struct inode *inode) 505 { 506 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 507 return false; 508 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 509 PNFS_LAYOUTRET_ON_SETATTR; 510 } 511 512 static inline bool 513 pnfs_ld_read_whole_page(struct inode *inode) 514 { 515 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 516 return false; 517 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 518 } 519 520 static inline int 521 pnfs_sync_inode(struct inode *inode, bool datasync) 522 { 523 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 524 return 0; 525 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 526 } 527 528 static inline bool 529 pnfs_layoutcommit_outstanding(struct inode *inode) 530 { 531 struct nfs_inode *nfsi = NFS_I(inode); 532 533 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 534 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 535 } 536 537 static inline int pnfs_return_layout(struct inode *ino) 538 { 539 struct nfs_inode *nfsi = NFS_I(ino); 540 struct nfs_server *nfss = NFS_SERVER(ino); 541 542 if (pnfs_enabled_sb(nfss) && nfsi->layout) { 543 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags); 544 return _pnfs_return_layout(ino); 545 } 546 547 return 0; 548 } 549 550 static inline bool 551 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 552 struct nfs_server *nfss) 553 { 554 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 555 nfss->pnfs_curr_ld->id == src->l_type); 556 } 557 558 static inline u64 559 pnfs_calc_offset_end(u64 offset, u64 len) 560 { 561 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 562 return NFS4_MAX_UINT64; 563 return offset + len - 1; 564 } 565 566 static inline u64 567 pnfs_calc_offset_length(u64 offset, u64 end) 568 { 569 if (end == NFS4_MAX_UINT64 || end <= offset) 570 return NFS4_MAX_UINT64; 571 return 1 + end - offset; 572 } 573 574 static inline void 575 pnfs_copy_range(struct pnfs_layout_range *dst, 576 const struct pnfs_layout_range *src) 577 { 578 memcpy(dst, src, sizeof(*dst)); 579 } 580 581 static inline u64 582 pnfs_end_offset(u64 start, u64 len) 583 { 584 if (NFS4_MAX_UINT64 - start <= len) 585 return NFS4_MAX_UINT64; 586 return start + len; 587 } 588 589 /* 590 * Are 2 ranges intersecting? 591 * start1 end1 592 * [----------------------------------) 593 * start2 end2 594 * [----------------) 595 */ 596 static inline bool 597 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 598 { 599 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 600 (end2 == NFS4_MAX_UINT64 || start1 < end2); 601 } 602 603 static inline bool 604 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 605 const struct pnfs_layout_range *l2) 606 { 607 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 608 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 609 610 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 611 } 612 613 static inline bool 614 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 615 { 616 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 617 u64 req_last = req_offset(req) + req->wb_bytes; 618 619 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 620 req_offset(req), req_last); 621 } 622 623 extern unsigned int layoutstats_timer; 624 625 #ifdef NFS_DEBUG 626 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 627 #else 628 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 629 { 630 } 631 632 #endif /* NFS_DEBUG */ 633 #else /* CONFIG_NFS_V4_1 */ 634 635 static inline bool nfs_have_layout(struct inode *inode) 636 { 637 return false; 638 } 639 640 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 641 { 642 } 643 644 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 645 { 646 } 647 648 static inline struct pnfs_layout_segment * 649 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 650 { 651 return NULL; 652 } 653 654 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 655 { 656 } 657 658 static inline int pnfs_return_layout(struct inode *ino) 659 { 660 return 0; 661 } 662 663 static inline int pnfs_commit_and_return_layout(struct inode *inode) 664 { 665 return 0; 666 } 667 668 static inline bool 669 pnfs_ld_layoutret_on_setattr(struct inode *inode) 670 { 671 return false; 672 } 673 674 static inline bool 675 pnfs_ld_read_whole_page(struct inode *inode) 676 { 677 return false; 678 } 679 680 static inline int 681 pnfs_sync_inode(struct inode *inode, bool datasync) 682 { 683 return 0; 684 } 685 686 static inline bool 687 pnfs_layoutcommit_outstanding(struct inode *inode) 688 { 689 return false; 690 } 691 692 693 static inline bool 694 pnfs_roc(struct inode *ino, 695 struct nfs4_layoutreturn_args *args, 696 struct nfs4_layoutreturn_res *res, 697 const struct rpc_cred *cred) 698 { 699 return false; 700 } 701 702 static inline void 703 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 704 struct nfs4_layoutreturn_res *res, 705 int ret) 706 { 707 } 708 709 static inline bool 710 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 711 { 712 return false; 713 } 714 715 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 716 const struct nfs_fh *mntfh, 717 struct nfs_fsinfo *fsinfo) 718 { 719 } 720 721 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 722 { 723 } 724 725 static inline int 726 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 727 struct nfs_commit_info *cinfo) 728 { 729 return PNFS_NOT_ATTEMPTED; 730 } 731 732 static inline struct pnfs_ds_commit_info * 733 pnfs_get_ds_info(struct inode *inode) 734 { 735 return NULL; 736 } 737 738 static inline bool 739 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 740 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 741 { 742 return false; 743 } 744 745 static inline bool 746 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 747 { 748 return false; 749 } 750 751 static inline int 752 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 753 int max) 754 { 755 return 0; 756 } 757 758 static inline struct nfs_page * 759 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 760 struct page *page) 761 { 762 return NULL; 763 } 764 765 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 766 { 767 return 0; 768 } 769 770 static inline bool 771 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 772 struct nfs_server *nfss) 773 { 774 return false; 775 } 776 777 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 778 { 779 return NULL; 780 } 781 782 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 783 { 784 } 785 786 static inline bool nfs4_layoutreturn_refresh_stateid(nfs4_stateid *dst, 787 struct pnfs_layout_range *dst_range, 788 struct inode *inode) 789 { 790 return false; 791 } 792 793 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 794 struct nfs_open_context *ctx) 795 { 796 } 797 798 static inline void pnfs_parse_lgopen(struct inode *ino, 799 struct nfs4_layoutget *lgp, 800 struct nfs_open_context *ctx) 801 { 802 } 803 804 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 805 { 806 } 807 808 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 809 { 810 return false; 811 } 812 813 #endif /* CONFIG_NFS_V4_1 */ 814 815 #if IS_ENABLED(CONFIG_NFS_V4_2) 816 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 817 #else 818 static inline int 819 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 820 { 821 return 0; 822 } 823 #endif 824 825 #endif /* FS_NFS_PNFS_H */ 826