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/nfs_fs.h> 34 #include <linux/nfs_page.h> 35 #include <linux/workqueue.h> 36 37 enum { 38 NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */ 39 NFS_LSEG_ROC, /* roc bit received from server */ 40 NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */ 41 NFS_LSEG_LAYOUTRETURN, /* layoutreturn bit set for layoutreturn */ 42 }; 43 44 /* Individual ip address */ 45 struct nfs4_pnfs_ds_addr { 46 struct sockaddr_storage da_addr; 47 size_t da_addrlen; 48 struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 49 char *da_remotestr; /* human readable addr+port */ 50 }; 51 52 struct nfs4_pnfs_ds { 53 struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 54 char *ds_remotestr; /* comma sep list of addrs */ 55 struct list_head ds_addrs; 56 struct nfs_client *ds_clp; 57 atomic_t ds_count; 58 unsigned long ds_state; 59 #define NFS4DS_CONNECTING 0 /* ds is establishing connection */ 60 }; 61 62 struct pnfs_layout_segment { 63 struct list_head pls_list; 64 struct list_head pls_lc_list; 65 struct pnfs_layout_range pls_range; 66 atomic_t pls_refcount; 67 u32 pls_seq; 68 unsigned long pls_flags; 69 struct pnfs_layout_hdr *pls_layout; 70 struct work_struct pls_work; 71 }; 72 73 enum pnfs_try_status { 74 PNFS_ATTEMPTED = 0, 75 PNFS_NOT_ATTEMPTED = 1, 76 PNFS_TRY_AGAIN = 2, 77 }; 78 79 #ifdef CONFIG_NFS_V4_1 80 81 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" 82 83 /* 84 * Default data server connection timeout and retrans vaules. 85 * Set by module parameters dataserver_timeo and dataserver_retrans. 86 */ 87 #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */ 88 #define NFS4_DEF_DS_RETRANS 5 89 90 /* error codes for internal use */ 91 #define NFS4ERR_RESET_TO_MDS 12001 92 #define NFS4ERR_RESET_TO_PNFS 12002 93 94 enum { 95 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ 96 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ 97 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ 98 NFS_LAYOUT_RETURN, /* layoutreturn in progress */ 99 NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */ 100 NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */ 101 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ 102 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ 103 }; 104 105 enum layoutdriver_policy_flags { 106 /* Should the pNFS client commit and return the layout upon truncate to 107 * a smaller size */ 108 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, 109 PNFS_LAYOUTRET_ON_ERROR = 1 << 1, 110 PNFS_READ_WHOLE_PAGE = 1 << 2, 111 }; 112 113 struct nfs4_deviceid_node; 114 115 /* Per-layout driver specific registration structure */ 116 struct pnfs_layoutdriver_type { 117 struct list_head pnfs_tblid; 118 const u32 id; 119 const char *name; 120 struct module *owner; 121 unsigned flags; 122 unsigned max_deviceinfo_size; 123 124 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); 125 int (*clear_layoutdriver) (struct nfs_server *); 126 127 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); 128 void (*free_layout_hdr) (struct pnfs_layout_hdr *); 129 130 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); 131 void (*free_lseg) (struct pnfs_layout_segment *lseg); 132 void (*add_lseg) (struct pnfs_layout_hdr *layoutid, 133 struct pnfs_layout_segment *lseg, 134 struct list_head *free_me); 135 136 void (*return_range) (struct pnfs_layout_hdr *lo, 137 struct pnfs_layout_range *range); 138 139 /* test for nfs page cache coalescing */ 140 const struct nfs_pageio_ops *pg_read_ops; 141 const struct nfs_pageio_ops *pg_write_ops; 142 143 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); 144 void (*mark_request_commit) (struct nfs_page *req, 145 struct pnfs_layout_segment *lseg, 146 struct nfs_commit_info *cinfo, 147 u32 ds_commit_idx); 148 void (*clear_request_commit) (struct nfs_page *req, 149 struct nfs_commit_info *cinfo); 150 int (*scan_commit_lists) (struct nfs_commit_info *cinfo, 151 int max); 152 void (*recover_commit_reqs) (struct list_head *list, 153 struct nfs_commit_info *cinfo); 154 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, 155 struct page *page); 156 int (*commit_pagelist)(struct inode *inode, 157 struct list_head *mds_pages, 158 int how, 159 struct nfs_commit_info *cinfo); 160 161 int (*sync)(struct inode *inode, bool datasync); 162 163 /* 164 * Return PNFS_ATTEMPTED to indicate the layout code has attempted 165 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS 166 */ 167 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); 168 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); 169 170 void (*free_deviceid_node) (struct nfs4_deviceid_node *); 171 struct nfs4_deviceid_node * (*alloc_deviceid_node) 172 (struct nfs_server *server, struct pnfs_device *pdev, 173 gfp_t gfp_flags); 174 175 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *); 176 177 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); 178 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); 179 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); 180 }; 181 182 struct pnfs_layout_hdr { 183 atomic_t plh_refcount; 184 atomic_t plh_outstanding; /* number of RPCs out */ 185 struct list_head plh_layouts; /* other client layouts */ 186 struct list_head plh_bulk_destroy; 187 struct list_head plh_segs; /* layout segments list */ 188 struct list_head plh_return_segs; /* invalid layout segments */ 189 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 190 unsigned long plh_retry_timestamp; 191 unsigned long plh_flags; 192 nfs4_stateid plh_stateid; 193 u32 plh_barrier; /* ignore lower seqids */ 194 u32 plh_return_seq; 195 enum pnfs_iomode plh_return_iomode; 196 loff_t plh_lwb; /* last write byte for layoutcommit */ 197 struct rpc_cred *plh_lc_cred; /* layoutcommit cred */ 198 struct inode *plh_inode; 199 }; 200 201 struct pnfs_device { 202 struct nfs4_deviceid dev_id; 203 unsigned int layout_type; 204 unsigned int mincount; 205 unsigned int maxcount; /* gdia_maxcount */ 206 struct page **pages; 207 unsigned int pgbase; 208 unsigned int pglen; /* reply buffer length */ 209 unsigned char nocache : 1;/* May not be cached */ 210 }; 211 212 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 213 214 struct pnfs_devicelist { 215 unsigned int eof; 216 unsigned int num_devs; 217 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 218 }; 219 220 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 221 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 222 223 /* nfs4proc.c */ 224 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 225 struct pnfs_device *dev, 226 struct rpc_cred *cred); 227 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags); 228 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); 229 230 /* pnfs.c */ 231 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 232 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 233 void pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg); 234 235 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); 236 void unset_pnfs_layoutdriver(struct nfs_server *); 237 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio); 238 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 239 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 240 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 241 struct nfs_page *req, u64 wb_size); 242 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 243 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 244 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 245 struct nfs_page *prev, struct nfs_page *req); 246 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 247 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 248 void pnfs_free_lseg_list(struct list_head *tmp_list); 249 void pnfs_destroy_layout(struct nfs_inode *); 250 void pnfs_destroy_all_layouts(struct nfs_client *); 251 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, 252 struct nfs_fsid *fsid, 253 bool is_recall); 254 int pnfs_destroy_layouts_byclid(struct nfs_client *clp, 255 bool is_recall); 256 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 257 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 258 const nfs4_stateid *new, 259 bool update_barrier); 260 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 261 struct list_head *tmp_list, 262 const struct pnfs_layout_range *recall_range, 263 u32 seq); 264 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 265 struct list_head *tmp_list, 266 const struct pnfs_layout_range *recall_range, 267 u32 seq); 268 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 269 struct list_head *lseg_list); 270 bool pnfs_roc(struct inode *ino, 271 struct nfs4_layoutreturn_args *args, 272 struct nfs4_layoutreturn_res *res, 273 const struct rpc_cred *cred); 274 void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 275 struct nfs4_layoutreturn_res *res, 276 int ret); 277 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 278 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 279 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 280 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 281 int pnfs_generic_sync(struct inode *inode, bool datasync); 282 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 283 int _pnfs_return_layout(struct inode *); 284 int pnfs_commit_and_return_layout(struct inode *); 285 void pnfs_ld_write_done(struct nfs_pgio_header *); 286 void pnfs_ld_read_done(struct nfs_pgio_header *); 287 void pnfs_read_resend_pnfs(struct nfs_pgio_header *); 288 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 289 struct nfs_open_context *ctx, 290 loff_t pos, 291 u64 count, 292 enum pnfs_iomode iomode, 293 bool strict_iomode, 294 gfp_t gfp_flags); 295 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 296 const nfs4_stateid *arg_stateid, 297 const struct pnfs_layout_range *range, 298 const nfs4_stateid *stateid); 299 300 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 301 struct pnfs_layout_segment *lseg, 302 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 303 const struct pnfs_layout_range *old), 304 bool (*do_merge)(struct pnfs_layout_segment *lseg, 305 struct pnfs_layout_segment *old), 306 struct list_head *free_me); 307 308 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 309 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 310 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 311 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 312 void pnfs_error_mark_layout_for_return(struct inode *inode, 313 struct pnfs_layout_segment *lseg); 314 /* nfs4_deviceid_flags */ 315 enum { 316 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 317 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 318 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 319 }; 320 321 /* pnfs_dev.c */ 322 struct nfs4_deviceid_node { 323 struct hlist_node node; 324 struct hlist_node tmpnode; 325 const struct pnfs_layoutdriver_type *ld; 326 const struct nfs_client *nfs_client; 327 unsigned long flags; 328 unsigned long timestamp_unavailable; 329 struct nfs4_deviceid deviceid; 330 struct rcu_head rcu; 331 atomic_t ref; 332 }; 333 334 struct nfs4_deviceid_node * 335 nfs4_find_get_deviceid(struct nfs_server *server, 336 const struct nfs4_deviceid *id, struct rpc_cred *cred, 337 gfp_t gfp_mask); 338 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 339 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 340 const struct nfs4_deviceid *); 341 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 342 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 343 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 344 void nfs4_deviceid_purge_client(const struct nfs_client *); 345 346 /* pnfs_nfs.c */ 347 void pnfs_generic_clear_request_commit(struct nfs_page *req, 348 struct nfs_commit_info *cinfo); 349 void pnfs_generic_commit_release(void *calldata); 350 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 351 void pnfs_generic_rw_release(void *data); 352 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 353 struct nfs_commit_info *cinfo); 354 int pnfs_generic_commit_pagelist(struct inode *inode, 355 struct list_head *mds_pages, 356 int how, 357 struct nfs_commit_info *cinfo, 358 int (*initiate_commit)(struct nfs_commit_data *data, 359 int how)); 360 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 361 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 362 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 363 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 364 gfp_t gfp_flags); 365 void nfs4_pnfs_v3_ds_connect_unload(void); 366 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 367 struct nfs4_deviceid_node *devid, unsigned int timeo, 368 unsigned int retrans, u32 version, u32 minor_version); 369 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 370 struct xdr_stream *xdr, 371 gfp_t gfp_flags); 372 void pnfs_layout_mark_request_commit(struct nfs_page *req, 373 struct pnfs_layout_segment *lseg, 374 struct nfs_commit_info *cinfo, 375 u32 ds_commit_idx); 376 377 static inline bool nfs_have_layout(struct inode *inode) 378 { 379 return NFS_I(inode)->layout != NULL; 380 } 381 382 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 383 { 384 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 385 } 386 387 static inline struct nfs4_deviceid_node * 388 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 389 { 390 atomic_inc(&d->ref); 391 return d; 392 } 393 394 static inline struct pnfs_layout_segment * 395 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 396 { 397 if (lseg) { 398 atomic_inc(&lseg->pls_refcount); 399 smp_mb__after_atomic(); 400 } 401 return lseg; 402 } 403 404 static inline bool 405 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 406 { 407 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 408 } 409 410 /* Return true if a layout driver is being used for this mountpoint */ 411 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 412 { 413 return nfss->pnfs_curr_ld != NULL; 414 } 415 416 static inline int 417 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 418 struct nfs_commit_info *cinfo) 419 { 420 if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) 421 return PNFS_NOT_ATTEMPTED; 422 return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); 423 } 424 425 static inline struct pnfs_ds_commit_info * 426 pnfs_get_ds_info(struct inode *inode) 427 { 428 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 429 430 if (ld == NULL || ld->get_ds_info == NULL) 431 return NULL; 432 return ld->get_ds_info(inode); 433 } 434 435 static inline void 436 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 437 { 438 set_bit(NFS_DEVICEID_INVALID, &node->flags); 439 } 440 441 static inline bool 442 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 443 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 444 { 445 struct inode *inode = d_inode(req->wb_context->dentry); 446 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 447 448 if (lseg == NULL || ld->mark_request_commit == NULL) 449 return false; 450 ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 451 return true; 452 } 453 454 static inline bool 455 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 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 (ld == NULL || ld->clear_request_commit == NULL) 461 return false; 462 ld->clear_request_commit(req, cinfo); 463 return true; 464 } 465 466 static inline int 467 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 468 int max) 469 { 470 if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) 471 return 0; 472 else 473 return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); 474 } 475 476 static inline struct nfs_page * 477 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 478 struct page *page) 479 { 480 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 481 482 if (ld == NULL || ld->search_commit_reqs == NULL) 483 return NULL; 484 return ld->search_commit_reqs(cinfo, page); 485 } 486 487 /* Should the pNFS client commit and return the layout upon a setattr */ 488 static inline bool 489 pnfs_ld_layoutret_on_setattr(struct inode *inode) 490 { 491 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 492 return false; 493 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 494 PNFS_LAYOUTRET_ON_SETATTR; 495 } 496 497 static inline bool 498 pnfs_ld_read_whole_page(struct inode *inode) 499 { 500 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 501 return false; 502 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 503 } 504 505 static inline int 506 pnfs_sync_inode(struct inode *inode, bool datasync) 507 { 508 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 509 return 0; 510 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 511 } 512 513 static inline bool 514 pnfs_layoutcommit_outstanding(struct inode *inode) 515 { 516 struct nfs_inode *nfsi = NFS_I(inode); 517 518 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 519 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 520 } 521 522 static inline int pnfs_return_layout(struct inode *ino) 523 { 524 struct nfs_inode *nfsi = NFS_I(ino); 525 struct nfs_server *nfss = NFS_SERVER(ino); 526 527 if (pnfs_enabled_sb(nfss) && nfsi->layout) 528 return _pnfs_return_layout(ino); 529 530 return 0; 531 } 532 533 static inline bool 534 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 535 struct nfs_server *nfss) 536 { 537 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 538 nfss->pnfs_curr_ld->id == src->l_type); 539 } 540 541 static inline u64 542 pnfs_calc_offset_end(u64 offset, u64 len) 543 { 544 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 545 return NFS4_MAX_UINT64; 546 return offset + len - 1; 547 } 548 549 static inline u64 550 pnfs_calc_offset_length(u64 offset, u64 end) 551 { 552 if (end == NFS4_MAX_UINT64 || end <= offset) 553 return NFS4_MAX_UINT64; 554 return 1 + end - offset; 555 } 556 557 static inline void 558 pnfs_copy_range(struct pnfs_layout_range *dst, 559 const struct pnfs_layout_range *src) 560 { 561 memcpy(dst, src, sizeof(*dst)); 562 } 563 564 static inline u64 565 pnfs_end_offset(u64 start, u64 len) 566 { 567 if (NFS4_MAX_UINT64 - start <= len) 568 return NFS4_MAX_UINT64; 569 return start + len; 570 } 571 572 /* 573 * Are 2 ranges intersecting? 574 * start1 end1 575 * [----------------------------------) 576 * start2 end2 577 * [----------------) 578 */ 579 static inline bool 580 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 581 { 582 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 583 (end2 == NFS4_MAX_UINT64 || start1 < end2); 584 } 585 586 static inline bool 587 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 588 const struct pnfs_layout_range *l2) 589 { 590 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 591 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 592 593 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 594 } 595 596 static inline bool 597 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 598 { 599 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 600 u64 req_last = req_offset(req) + req->wb_bytes; 601 602 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 603 req_offset(req), req_last); 604 } 605 606 extern unsigned int layoutstats_timer; 607 608 #ifdef NFS_DEBUG 609 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 610 #else 611 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 612 { 613 } 614 615 #endif /* NFS_DEBUG */ 616 #else /* CONFIG_NFS_V4_1 */ 617 618 static inline bool nfs_have_layout(struct inode *inode) 619 { 620 return false; 621 } 622 623 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 624 { 625 } 626 627 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 628 { 629 } 630 631 static inline struct pnfs_layout_segment * 632 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 633 { 634 return NULL; 635 } 636 637 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 638 { 639 } 640 641 static inline int pnfs_return_layout(struct inode *ino) 642 { 643 return 0; 644 } 645 646 static inline int pnfs_commit_and_return_layout(struct inode *inode) 647 { 648 return 0; 649 } 650 651 static inline bool 652 pnfs_ld_layoutret_on_setattr(struct inode *inode) 653 { 654 return false; 655 } 656 657 static inline bool 658 pnfs_ld_read_whole_page(struct inode *inode) 659 { 660 return false; 661 } 662 663 static inline int 664 pnfs_sync_inode(struct inode *inode, bool datasync) 665 { 666 return 0; 667 } 668 669 static inline bool 670 pnfs_layoutcommit_outstanding(struct inode *inode) 671 { 672 return false; 673 } 674 675 676 static inline bool 677 pnfs_roc(struct inode *ino, 678 struct nfs4_layoutreturn_args *args, 679 struct nfs4_layoutreturn_res *res, 680 const struct rpc_cred *cred) 681 { 682 return false; 683 } 684 685 static inline void 686 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 687 struct nfs4_layoutreturn_res *res, 688 int ret) 689 { 690 } 691 692 static inline bool 693 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 694 { 695 return false; 696 } 697 698 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 699 const struct nfs_fh *mntfh, 700 struct nfs_fsinfo *fsinfo) 701 { 702 } 703 704 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 705 { 706 } 707 708 static inline int 709 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 710 struct nfs_commit_info *cinfo) 711 { 712 return PNFS_NOT_ATTEMPTED; 713 } 714 715 static inline struct pnfs_ds_commit_info * 716 pnfs_get_ds_info(struct inode *inode) 717 { 718 return NULL; 719 } 720 721 static inline bool 722 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 723 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 724 { 725 return false; 726 } 727 728 static inline bool 729 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 730 { 731 return false; 732 } 733 734 static inline int 735 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 736 int max) 737 { 738 return 0; 739 } 740 741 static inline struct nfs_page * 742 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 743 struct page *page) 744 { 745 return NULL; 746 } 747 748 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 749 { 750 return 0; 751 } 752 753 static inline bool 754 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 755 struct nfs_server *nfss) 756 { 757 return false; 758 } 759 760 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 761 { 762 return NULL; 763 } 764 765 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 766 { 767 } 768 769 #endif /* CONFIG_NFS_V4_1 */ 770 771 #if IS_ENABLED(CONFIG_NFS_V4_2) 772 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 773 #else 774 static inline int 775 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 776 { 777 return 0; 778 } 779 #endif 780 781 #endif /* FS_NFS_PNFS_H */ 782