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 NFS_LAYOUT_INODE_FREEING, /* The inode is being freed */ 108 }; 109 110 enum layoutdriver_policy_flags { 111 /* Should the pNFS client commit and return the layout upon truncate to 112 * a smaller size */ 113 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, 114 PNFS_LAYOUTRET_ON_ERROR = 1 << 1, 115 PNFS_READ_WHOLE_PAGE = 1 << 2, 116 PNFS_LAYOUTGET_ON_OPEN = 1 << 3, 117 }; 118 119 struct nfs4_deviceid_node; 120 121 /* Per-layout driver specific registration structure */ 122 struct pnfs_layoutdriver_type { 123 struct list_head pnfs_tblid; 124 const u32 id; 125 const char *name; 126 struct module *owner; 127 unsigned flags; 128 unsigned max_deviceinfo_size; 129 unsigned max_layoutget_response; 130 131 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); 132 int (*clear_layoutdriver) (struct nfs_server *); 133 134 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); 135 void (*free_layout_hdr) (struct pnfs_layout_hdr *); 136 137 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); 138 void (*free_lseg) (struct pnfs_layout_segment *lseg); 139 void (*add_lseg) (struct pnfs_layout_hdr *layoutid, 140 struct pnfs_layout_segment *lseg, 141 struct list_head *free_me); 142 143 void (*return_range) (struct pnfs_layout_hdr *lo, 144 struct pnfs_layout_range *range); 145 146 /* test for nfs page cache coalescing */ 147 const struct nfs_pageio_ops *pg_read_ops; 148 const struct nfs_pageio_ops *pg_write_ops; 149 150 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); 151 void (*mark_request_commit) (struct nfs_page *req, 152 struct pnfs_layout_segment *lseg, 153 struct nfs_commit_info *cinfo, 154 u32 ds_commit_idx); 155 void (*clear_request_commit) (struct nfs_page *req, 156 struct nfs_commit_info *cinfo); 157 int (*scan_commit_lists) (struct nfs_commit_info *cinfo, 158 int max); 159 void (*recover_commit_reqs) (struct list_head *list, 160 struct nfs_commit_info *cinfo); 161 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, 162 struct page *page); 163 int (*commit_pagelist)(struct inode *inode, 164 struct list_head *mds_pages, 165 int how, 166 struct nfs_commit_info *cinfo); 167 168 int (*sync)(struct inode *inode, bool datasync); 169 170 /* 171 * Return PNFS_ATTEMPTED to indicate the layout code has attempted 172 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS 173 */ 174 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); 175 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); 176 177 void (*free_deviceid_node) (struct nfs4_deviceid_node *); 178 struct nfs4_deviceid_node * (*alloc_deviceid_node) 179 (struct nfs_server *server, struct pnfs_device *pdev, 180 gfp_t gfp_flags); 181 182 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *); 183 184 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); 185 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); 186 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); 187 }; 188 189 struct pnfs_layout_hdr { 190 refcount_t plh_refcount; 191 atomic_t plh_outstanding; /* number of RPCs out */ 192 struct list_head plh_layouts; /* other client layouts */ 193 struct list_head plh_bulk_destroy; 194 struct list_head plh_segs; /* layout segments list */ 195 struct list_head plh_return_segs; /* invalid layout segments */ 196 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 197 unsigned long plh_retry_timestamp; 198 unsigned long plh_flags; 199 nfs4_stateid plh_stateid; 200 u32 plh_barrier; /* ignore lower seqids */ 201 u32 plh_return_seq; 202 enum pnfs_iomode plh_return_iomode; 203 loff_t plh_lwb; /* last write byte for layoutcommit */ 204 const struct cred *plh_lc_cred; /* layoutcommit cred */ 205 struct inode *plh_inode; 206 }; 207 208 struct pnfs_device { 209 struct nfs4_deviceid dev_id; 210 unsigned int layout_type; 211 unsigned int mincount; 212 unsigned int maxcount; /* gdia_maxcount */ 213 struct page **pages; 214 unsigned int pgbase; 215 unsigned int pglen; /* reply buffer length */ 216 unsigned char nocache : 1;/* May not be cached */ 217 }; 218 219 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 220 221 struct pnfs_devicelist { 222 unsigned int eof; 223 unsigned int num_devs; 224 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 225 }; 226 227 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 228 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 229 230 /* nfs4proc.c */ 231 extern size_t max_response_pages(struct nfs_server *server); 232 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 233 struct pnfs_device *dev, 234 const struct cred *cred); 235 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout); 236 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); 237 238 /* pnfs.c */ 239 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 240 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 241 242 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); 243 void unset_pnfs_layoutdriver(struct nfs_server *); 244 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio); 245 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 246 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 247 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 248 struct nfs_page *req, u64 wb_size); 249 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 250 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 251 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 252 struct nfs_page *prev, struct nfs_page *req); 253 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 254 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 255 void pnfs_layoutget_free(struct nfs4_layoutget *lgp); 256 void pnfs_free_lseg_list(struct list_head *tmp_list); 257 void pnfs_destroy_layout(struct nfs_inode *); 258 void pnfs_destroy_all_layouts(struct nfs_client *); 259 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, 260 struct nfs_fsid *fsid, 261 bool is_recall); 262 int pnfs_destroy_layouts_byclid(struct nfs_client *clp, 263 bool is_recall); 264 bool nfs4_layoutreturn_refresh_stateid(nfs4_stateid *dst, 265 struct pnfs_layout_range *dst_range, 266 struct inode *inode); 267 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 268 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 269 const nfs4_stateid *new, 270 bool update_barrier); 271 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 272 struct list_head *tmp_list, 273 const struct pnfs_layout_range *recall_range, 274 u32 seq); 275 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 276 struct list_head *tmp_list, 277 const struct pnfs_layout_range *recall_range, 278 u32 seq); 279 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 280 struct list_head *lseg_list); 281 bool pnfs_roc(struct inode *ino, 282 struct nfs4_layoutreturn_args *args, 283 struct nfs4_layoutreturn_res *res, 284 const struct cred *cred); 285 void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 286 struct nfs4_layoutreturn_res *res, 287 int ret); 288 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 289 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 290 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 291 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 292 int pnfs_generic_sync(struct inode *inode, bool datasync); 293 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 294 int _pnfs_return_layout(struct inode *); 295 int pnfs_commit_and_return_layout(struct inode *); 296 void pnfs_ld_write_done(struct nfs_pgio_header *); 297 void pnfs_ld_read_done(struct nfs_pgio_header *); 298 void pnfs_read_resend_pnfs(struct nfs_pgio_header *); 299 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 300 struct nfs_open_context *ctx, 301 loff_t pos, 302 u64 count, 303 enum pnfs_iomode iomode, 304 bool strict_iomode, 305 gfp_t gfp_flags); 306 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 307 const nfs4_stateid *arg_stateid, 308 const struct pnfs_layout_range *range, 309 const nfs4_stateid *stateid); 310 311 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 312 struct pnfs_layout_segment *lseg, 313 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 314 const struct pnfs_layout_range *old), 315 bool (*do_merge)(struct pnfs_layout_segment *lseg, 316 struct pnfs_layout_segment *old), 317 struct list_head *free_me); 318 319 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 320 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 321 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 322 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 323 void pnfs_error_mark_layout_for_return(struct inode *inode, 324 struct pnfs_layout_segment *lseg); 325 /* nfs4_deviceid_flags */ 326 enum { 327 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 328 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 329 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 330 }; 331 332 /* pnfs_dev.c */ 333 struct nfs4_deviceid_node { 334 struct hlist_node node; 335 struct hlist_node tmpnode; 336 const struct pnfs_layoutdriver_type *ld; 337 const struct nfs_client *nfs_client; 338 unsigned long flags; 339 unsigned long timestamp_unavailable; 340 struct nfs4_deviceid deviceid; 341 struct rcu_head rcu; 342 atomic_t ref; 343 }; 344 345 struct nfs4_deviceid_node * 346 nfs4_find_get_deviceid(struct nfs_server *server, 347 const struct nfs4_deviceid *id, const struct cred *cred, 348 gfp_t gfp_mask); 349 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 350 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 351 const struct nfs4_deviceid *); 352 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 353 void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node); 354 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 355 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 356 void nfs4_deviceid_purge_client(const struct nfs_client *); 357 358 /* pnfs_nfs.c */ 359 void pnfs_generic_clear_request_commit(struct nfs_page *req, 360 struct nfs_commit_info *cinfo); 361 void pnfs_generic_commit_release(void *calldata); 362 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 363 void pnfs_generic_rw_release(void *data); 364 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 365 struct nfs_commit_info *cinfo); 366 int pnfs_generic_commit_pagelist(struct inode *inode, 367 struct list_head *mds_pages, 368 int how, 369 struct nfs_commit_info *cinfo, 370 int (*initiate_commit)(struct nfs_commit_data *data, 371 int how)); 372 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 373 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 374 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 375 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 376 gfp_t gfp_flags); 377 void nfs4_pnfs_v3_ds_connect_unload(void); 378 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 379 struct nfs4_deviceid_node *devid, unsigned int timeo, 380 unsigned int retrans, u32 version, u32 minor_version); 381 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 382 struct xdr_stream *xdr, 383 gfp_t gfp_flags); 384 void pnfs_layout_mark_request_commit(struct nfs_page *req, 385 struct pnfs_layout_segment *lseg, 386 struct nfs_commit_info *cinfo, 387 u32 ds_commit_idx); 388 void pnfs_lgopen_prepare(struct nfs4_opendata *data, 389 struct nfs_open_context *ctx); 390 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, 391 struct nfs_open_context *ctx); 392 void nfs4_lgopen_release(struct nfs4_layoutget *lgp); 393 394 static inline bool nfs_have_layout(struct inode *inode) 395 { 396 return NFS_I(inode)->layout != NULL; 397 } 398 399 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 400 { 401 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 402 } 403 404 static inline struct nfs4_deviceid_node * 405 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 406 { 407 atomic_inc(&d->ref); 408 return d; 409 } 410 411 static inline struct pnfs_layout_segment * 412 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 413 { 414 if (lseg) { 415 refcount_inc(&lseg->pls_refcount); 416 smp_mb__after_atomic(); 417 } 418 return lseg; 419 } 420 421 static inline bool 422 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 423 { 424 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 425 } 426 427 /* Return true if a layout driver is being used for this mountpoint */ 428 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 429 { 430 return nfss->pnfs_curr_ld != NULL; 431 } 432 433 static inline int 434 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 435 struct nfs_commit_info *cinfo) 436 { 437 if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) 438 return PNFS_NOT_ATTEMPTED; 439 return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); 440 } 441 442 static inline struct pnfs_ds_commit_info * 443 pnfs_get_ds_info(struct inode *inode) 444 { 445 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 446 447 if (ld == NULL || ld->get_ds_info == NULL) 448 return NULL; 449 return ld->get_ds_info(inode); 450 } 451 452 static inline void 453 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 454 { 455 set_bit(NFS_DEVICEID_INVALID, &node->flags); 456 } 457 458 static inline bool 459 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 460 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 461 { 462 struct inode *inode = d_inode(req->wb_context->dentry); 463 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 464 465 if (lseg == NULL || ld->mark_request_commit == NULL) 466 return false; 467 ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 468 return true; 469 } 470 471 static inline bool 472 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 473 { 474 struct inode *inode = d_inode(req->wb_context->dentry); 475 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 476 477 if (ld == NULL || ld->clear_request_commit == NULL) 478 return false; 479 ld->clear_request_commit(req, cinfo); 480 return true; 481 } 482 483 static inline int 484 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 485 int max) 486 { 487 if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) 488 return 0; 489 else 490 return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); 491 } 492 493 static inline struct nfs_page * 494 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 495 struct page *page) 496 { 497 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 498 499 if (ld == NULL || ld->search_commit_reqs == NULL) 500 return NULL; 501 return ld->search_commit_reqs(cinfo, page); 502 } 503 504 /* Should the pNFS client commit and return the layout upon a setattr */ 505 static inline bool 506 pnfs_ld_layoutret_on_setattr(struct inode *inode) 507 { 508 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 509 return false; 510 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 511 PNFS_LAYOUTRET_ON_SETATTR; 512 } 513 514 static inline bool 515 pnfs_ld_read_whole_page(struct inode *inode) 516 { 517 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 518 return false; 519 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 520 } 521 522 static inline int 523 pnfs_sync_inode(struct inode *inode, bool datasync) 524 { 525 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 526 return 0; 527 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 528 } 529 530 static inline bool 531 pnfs_layoutcommit_outstanding(struct inode *inode) 532 { 533 struct nfs_inode *nfsi = NFS_I(inode); 534 535 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 536 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 537 } 538 539 static inline int pnfs_return_layout(struct inode *ino) 540 { 541 struct nfs_inode *nfsi = NFS_I(ino); 542 struct nfs_server *nfss = NFS_SERVER(ino); 543 544 if (pnfs_enabled_sb(nfss) && nfsi->layout) { 545 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags); 546 return _pnfs_return_layout(ino); 547 } 548 549 return 0; 550 } 551 552 static inline bool 553 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 554 struct nfs_server *nfss) 555 { 556 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 557 nfss->pnfs_curr_ld->id == src->l_type); 558 } 559 560 static inline u64 561 pnfs_calc_offset_end(u64 offset, u64 len) 562 { 563 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 564 return NFS4_MAX_UINT64; 565 return offset + len - 1; 566 } 567 568 static inline u64 569 pnfs_calc_offset_length(u64 offset, u64 end) 570 { 571 if (end == NFS4_MAX_UINT64 || end <= offset) 572 return NFS4_MAX_UINT64; 573 return 1 + end - offset; 574 } 575 576 static inline void 577 pnfs_copy_range(struct pnfs_layout_range *dst, 578 const struct pnfs_layout_range *src) 579 { 580 memcpy(dst, src, sizeof(*dst)); 581 } 582 583 static inline u64 584 pnfs_end_offset(u64 start, u64 len) 585 { 586 if (NFS4_MAX_UINT64 - start <= len) 587 return NFS4_MAX_UINT64; 588 return start + len; 589 } 590 591 /* 592 * Are 2 ranges intersecting? 593 * start1 end1 594 * [----------------------------------) 595 * start2 end2 596 * [----------------) 597 */ 598 static inline bool 599 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 600 { 601 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 602 (end2 == NFS4_MAX_UINT64 || start1 < end2); 603 } 604 605 static inline bool 606 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 607 const struct pnfs_layout_range *l2) 608 { 609 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 610 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 611 612 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 613 } 614 615 static inline bool 616 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 617 { 618 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 619 u64 req_last = req_offset(req) + req->wb_bytes; 620 621 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 622 req_offset(req), req_last); 623 } 624 625 extern unsigned int layoutstats_timer; 626 627 #ifdef NFS_DEBUG 628 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 629 #else 630 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 631 { 632 } 633 634 #endif /* NFS_DEBUG */ 635 #else /* CONFIG_NFS_V4_1 */ 636 637 static inline bool nfs_have_layout(struct inode *inode) 638 { 639 return false; 640 } 641 642 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 643 { 644 } 645 646 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 647 { 648 } 649 650 static inline struct pnfs_layout_segment * 651 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 652 { 653 return NULL; 654 } 655 656 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 657 { 658 } 659 660 static inline int pnfs_return_layout(struct inode *ino) 661 { 662 return 0; 663 } 664 665 static inline int pnfs_commit_and_return_layout(struct inode *inode) 666 { 667 return 0; 668 } 669 670 static inline bool 671 pnfs_ld_layoutret_on_setattr(struct inode *inode) 672 { 673 return false; 674 } 675 676 static inline bool 677 pnfs_ld_read_whole_page(struct inode *inode) 678 { 679 return false; 680 } 681 682 static inline int 683 pnfs_sync_inode(struct inode *inode, bool datasync) 684 { 685 return 0; 686 } 687 688 static inline bool 689 pnfs_layoutcommit_outstanding(struct inode *inode) 690 { 691 return false; 692 } 693 694 695 static inline bool 696 pnfs_roc(struct inode *ino, 697 struct nfs4_layoutreturn_args *args, 698 struct nfs4_layoutreturn_res *res, 699 const struct cred *cred) 700 { 701 return false; 702 } 703 704 static inline void 705 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 706 struct nfs4_layoutreturn_res *res, 707 int ret) 708 { 709 } 710 711 static inline bool 712 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 713 { 714 return false; 715 } 716 717 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 718 const struct nfs_fh *mntfh, 719 struct nfs_fsinfo *fsinfo) 720 { 721 } 722 723 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 724 { 725 } 726 727 static inline int 728 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 729 struct nfs_commit_info *cinfo) 730 { 731 return PNFS_NOT_ATTEMPTED; 732 } 733 734 static inline struct pnfs_ds_commit_info * 735 pnfs_get_ds_info(struct inode *inode) 736 { 737 return NULL; 738 } 739 740 static inline bool 741 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 742 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 743 { 744 return false; 745 } 746 747 static inline bool 748 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 749 { 750 return false; 751 } 752 753 static inline int 754 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 755 int max) 756 { 757 return 0; 758 } 759 760 static inline struct nfs_page * 761 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 762 struct page *page) 763 { 764 return NULL; 765 } 766 767 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 768 { 769 return 0; 770 } 771 772 static inline bool 773 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 774 struct nfs_server *nfss) 775 { 776 return false; 777 } 778 779 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 780 { 781 return NULL; 782 } 783 784 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 785 { 786 } 787 788 static inline bool nfs4_layoutreturn_refresh_stateid(nfs4_stateid *dst, 789 struct pnfs_layout_range *dst_range, 790 struct inode *inode) 791 { 792 return false; 793 } 794 795 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 796 struct nfs_open_context *ctx) 797 { 798 } 799 800 static inline void pnfs_parse_lgopen(struct inode *ino, 801 struct nfs4_layoutget *lgp, 802 struct nfs_open_context *ctx) 803 { 804 } 805 806 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 807 { 808 } 809 810 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 811 { 812 return false; 813 } 814 815 #endif /* CONFIG_NFS_V4_1 */ 816 817 #if IS_ENABLED(CONFIG_NFS_V4_2) 818 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 819 #else 820 static inline int 821 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 822 { 823 return 0; 824 } 825 #endif 826 827 #endif /* FS_NFS_PNFS_H */ 828