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 }; 71 72 enum pnfs_try_status { 73 PNFS_ATTEMPTED = 0, 74 PNFS_NOT_ATTEMPTED = 1, 75 PNFS_TRY_AGAIN = 2, 76 }; 77 78 #ifdef CONFIG_NFS_V4_1 79 80 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" 81 82 /* 83 * Default data server connection timeout and retrans vaules. 84 * Set by module parameters dataserver_timeo and dataserver_retrans. 85 */ 86 #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */ 87 #define NFS4_DEF_DS_RETRANS 5 88 89 /* error codes for internal use */ 90 #define NFS4ERR_RESET_TO_MDS 12001 91 #define NFS4ERR_RESET_TO_PNFS 12002 92 93 enum { 94 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ 95 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ 96 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ 97 NFS_LAYOUT_RETURN, /* layoutreturn in progress */ 98 NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */ 99 NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */ 100 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ 101 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ 102 }; 103 104 enum layoutdriver_policy_flags { 105 /* Should the pNFS client commit and return the layout upon truncate to 106 * a smaller size */ 107 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, 108 PNFS_LAYOUTRET_ON_ERROR = 1 << 1, 109 PNFS_READ_WHOLE_PAGE = 1 << 2, 110 }; 111 112 struct nfs4_deviceid_node; 113 114 /* Per-layout driver specific registration structure */ 115 struct pnfs_layoutdriver_type { 116 struct list_head pnfs_tblid; 117 const u32 id; 118 const char *name; 119 struct module *owner; 120 unsigned flags; 121 unsigned max_deviceinfo_size; 122 123 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); 124 int (*clear_layoutdriver) (struct nfs_server *); 125 126 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); 127 void (*free_layout_hdr) (struct pnfs_layout_hdr *); 128 129 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); 130 void (*free_lseg) (struct pnfs_layout_segment *lseg); 131 void (*add_lseg) (struct pnfs_layout_hdr *layoutid, 132 struct pnfs_layout_segment *lseg, 133 struct list_head *free_me); 134 135 void (*return_range) (struct pnfs_layout_hdr *lo, 136 struct pnfs_layout_range *range); 137 138 /* test for nfs page cache coalescing */ 139 const struct nfs_pageio_ops *pg_read_ops; 140 const struct nfs_pageio_ops *pg_write_ops; 141 142 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); 143 void (*mark_request_commit) (struct nfs_page *req, 144 struct pnfs_layout_segment *lseg, 145 struct nfs_commit_info *cinfo, 146 u32 ds_commit_idx); 147 void (*clear_request_commit) (struct nfs_page *req, 148 struct nfs_commit_info *cinfo); 149 int (*scan_commit_lists) (struct nfs_commit_info *cinfo, 150 int max); 151 void (*recover_commit_reqs) (struct list_head *list, 152 struct nfs_commit_info *cinfo); 153 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, 154 struct page *page); 155 int (*commit_pagelist)(struct inode *inode, 156 struct list_head *mds_pages, 157 int how, 158 struct nfs_commit_info *cinfo); 159 160 int (*sync)(struct inode *inode, bool datasync); 161 162 /* 163 * Return PNFS_ATTEMPTED to indicate the layout code has attempted 164 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS 165 */ 166 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); 167 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); 168 169 void (*free_deviceid_node) (struct nfs4_deviceid_node *); 170 struct nfs4_deviceid_node * (*alloc_deviceid_node) 171 (struct nfs_server *server, struct pnfs_device *pdev, 172 gfp_t gfp_flags); 173 174 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *); 175 176 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); 177 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); 178 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); 179 }; 180 181 struct pnfs_layout_hdr { 182 atomic_t plh_refcount; 183 atomic_t plh_outstanding; /* number of RPCs out */ 184 struct list_head plh_layouts; /* other client layouts */ 185 struct list_head plh_bulk_destroy; 186 struct list_head plh_segs; /* layout segments list */ 187 struct list_head plh_return_segs; /* invalid layout segments */ 188 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 189 unsigned long plh_retry_timestamp; 190 unsigned long plh_flags; 191 nfs4_stateid plh_stateid; 192 u32 plh_barrier; /* ignore lower seqids */ 193 u32 plh_return_seq; 194 enum pnfs_iomode plh_return_iomode; 195 loff_t plh_lwb; /* last write byte for layoutcommit */ 196 struct rpc_cred *plh_lc_cred; /* layoutcommit cred */ 197 struct inode *plh_inode; 198 }; 199 200 struct pnfs_device { 201 struct nfs4_deviceid dev_id; 202 unsigned int layout_type; 203 unsigned int mincount; 204 unsigned int maxcount; /* gdia_maxcount */ 205 struct page **pages; 206 unsigned int pgbase; 207 unsigned int pglen; /* reply buffer length */ 208 unsigned char nocache : 1;/* May not be cached */ 209 }; 210 211 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 212 213 struct pnfs_devicelist { 214 unsigned int eof; 215 unsigned int num_devs; 216 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 217 }; 218 219 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 220 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 221 222 /* nfs4proc.c */ 223 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 224 struct pnfs_device *dev, 225 struct rpc_cred *cred); 226 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags); 227 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); 228 229 /* pnfs.c */ 230 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 231 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 232 233 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); 234 void unset_pnfs_layoutdriver(struct nfs_server *); 235 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio); 236 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 237 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 238 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 239 struct nfs_page *req, u64 wb_size); 240 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 241 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 242 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 243 struct nfs_page *prev, struct nfs_page *req); 244 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 245 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 246 void pnfs_free_lseg_list(struct list_head *tmp_list); 247 void pnfs_destroy_layout(struct nfs_inode *); 248 void pnfs_destroy_all_layouts(struct nfs_client *); 249 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, 250 struct nfs_fsid *fsid, 251 bool is_recall); 252 int pnfs_destroy_layouts_byclid(struct nfs_client *clp, 253 bool is_recall); 254 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 255 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 256 const nfs4_stateid *new, 257 bool update_barrier); 258 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 259 struct list_head *tmp_list, 260 const struct pnfs_layout_range *recall_range, 261 u32 seq); 262 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 263 struct list_head *tmp_list, 264 const struct pnfs_layout_range *recall_range, 265 u32 seq); 266 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 267 struct list_head *lseg_list); 268 bool pnfs_roc(struct inode *ino, 269 struct nfs4_layoutreturn_args *args, 270 struct nfs4_layoutreturn_res *res, 271 const struct rpc_cred *cred); 272 void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 273 struct nfs4_layoutreturn_res *res, 274 int ret); 275 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 276 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 277 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 278 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 279 int pnfs_generic_sync(struct inode *inode, bool datasync); 280 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 281 int _pnfs_return_layout(struct inode *); 282 int pnfs_commit_and_return_layout(struct inode *); 283 void pnfs_ld_write_done(struct nfs_pgio_header *); 284 void pnfs_ld_read_done(struct nfs_pgio_header *); 285 void pnfs_read_resend_pnfs(struct nfs_pgio_header *); 286 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 287 struct nfs_open_context *ctx, 288 loff_t pos, 289 u64 count, 290 enum pnfs_iomode iomode, 291 bool strict_iomode, 292 gfp_t gfp_flags); 293 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 294 const nfs4_stateid *arg_stateid, 295 const struct pnfs_layout_range *range, 296 const nfs4_stateid *stateid); 297 298 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 299 struct pnfs_layout_segment *lseg, 300 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 301 const struct pnfs_layout_range *old), 302 bool (*do_merge)(struct pnfs_layout_segment *lseg, 303 struct pnfs_layout_segment *old), 304 struct list_head *free_me); 305 306 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 307 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 308 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 309 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 310 void pnfs_error_mark_layout_for_return(struct inode *inode, 311 struct pnfs_layout_segment *lseg); 312 /* nfs4_deviceid_flags */ 313 enum { 314 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 315 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 316 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 317 }; 318 319 /* pnfs_dev.c */ 320 struct nfs4_deviceid_node { 321 struct hlist_node node; 322 struct hlist_node tmpnode; 323 const struct pnfs_layoutdriver_type *ld; 324 const struct nfs_client *nfs_client; 325 unsigned long flags; 326 unsigned long timestamp_unavailable; 327 struct nfs4_deviceid deviceid; 328 struct rcu_head rcu; 329 atomic_t ref; 330 }; 331 332 struct nfs4_deviceid_node * 333 nfs4_find_get_deviceid(struct nfs_server *server, 334 const struct nfs4_deviceid *id, struct rpc_cred *cred, 335 gfp_t gfp_mask); 336 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 337 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 338 const struct nfs4_deviceid *); 339 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 340 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 341 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 342 void nfs4_deviceid_purge_client(const struct nfs_client *); 343 344 /* pnfs_nfs.c */ 345 void pnfs_generic_clear_request_commit(struct nfs_page *req, 346 struct nfs_commit_info *cinfo); 347 void pnfs_generic_commit_release(void *calldata); 348 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 349 void pnfs_generic_rw_release(void *data); 350 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 351 struct nfs_commit_info *cinfo); 352 int pnfs_generic_commit_pagelist(struct inode *inode, 353 struct list_head *mds_pages, 354 int how, 355 struct nfs_commit_info *cinfo, 356 int (*initiate_commit)(struct nfs_commit_data *data, 357 int how)); 358 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 359 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 360 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 361 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 362 gfp_t gfp_flags); 363 void nfs4_pnfs_v3_ds_connect_unload(void); 364 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 365 struct nfs4_deviceid_node *devid, unsigned int timeo, 366 unsigned int retrans, u32 version, u32 minor_version); 367 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 368 struct xdr_stream *xdr, 369 gfp_t gfp_flags); 370 void pnfs_layout_mark_request_commit(struct nfs_page *req, 371 struct pnfs_layout_segment *lseg, 372 struct nfs_commit_info *cinfo, 373 u32 ds_commit_idx); 374 375 static inline bool nfs_have_layout(struct inode *inode) 376 { 377 return NFS_I(inode)->layout != NULL; 378 } 379 380 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 381 { 382 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 383 } 384 385 static inline struct nfs4_deviceid_node * 386 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 387 { 388 atomic_inc(&d->ref); 389 return d; 390 } 391 392 static inline struct pnfs_layout_segment * 393 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 394 { 395 if (lseg) { 396 atomic_inc(&lseg->pls_refcount); 397 smp_mb__after_atomic(); 398 } 399 return lseg; 400 } 401 402 static inline bool 403 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 404 { 405 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 406 } 407 408 /* Return true if a layout driver is being used for this mountpoint */ 409 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 410 { 411 return nfss->pnfs_curr_ld != NULL; 412 } 413 414 static inline int 415 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 416 struct nfs_commit_info *cinfo) 417 { 418 if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) 419 return PNFS_NOT_ATTEMPTED; 420 return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); 421 } 422 423 static inline struct pnfs_ds_commit_info * 424 pnfs_get_ds_info(struct inode *inode) 425 { 426 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 427 428 if (ld == NULL || ld->get_ds_info == NULL) 429 return NULL; 430 return ld->get_ds_info(inode); 431 } 432 433 static inline void 434 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 435 { 436 set_bit(NFS_DEVICEID_INVALID, &node->flags); 437 } 438 439 static inline bool 440 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 441 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 442 { 443 struct inode *inode = d_inode(req->wb_context->dentry); 444 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 445 446 if (lseg == NULL || ld->mark_request_commit == NULL) 447 return false; 448 ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 449 return true; 450 } 451 452 static inline bool 453 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 454 { 455 struct inode *inode = d_inode(req->wb_context->dentry); 456 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 457 458 if (ld == NULL || ld->clear_request_commit == NULL) 459 return false; 460 ld->clear_request_commit(req, cinfo); 461 return true; 462 } 463 464 static inline int 465 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 466 int max) 467 { 468 if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) 469 return 0; 470 else 471 return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); 472 } 473 474 static inline struct nfs_page * 475 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 476 struct page *page) 477 { 478 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 479 480 if (ld == NULL || ld->search_commit_reqs == NULL) 481 return NULL; 482 return ld->search_commit_reqs(cinfo, page); 483 } 484 485 /* Should the pNFS client commit and return the layout upon a setattr */ 486 static inline bool 487 pnfs_ld_layoutret_on_setattr(struct inode *inode) 488 { 489 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 490 return false; 491 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 492 PNFS_LAYOUTRET_ON_SETATTR; 493 } 494 495 static inline bool 496 pnfs_ld_read_whole_page(struct inode *inode) 497 { 498 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 499 return false; 500 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 501 } 502 503 static inline int 504 pnfs_sync_inode(struct inode *inode, bool datasync) 505 { 506 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 507 return 0; 508 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 509 } 510 511 static inline bool 512 pnfs_layoutcommit_outstanding(struct inode *inode) 513 { 514 struct nfs_inode *nfsi = NFS_I(inode); 515 516 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 517 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 518 } 519 520 static inline int pnfs_return_layout(struct inode *ino) 521 { 522 struct nfs_inode *nfsi = NFS_I(ino); 523 struct nfs_server *nfss = NFS_SERVER(ino); 524 525 if (pnfs_enabled_sb(nfss) && nfsi->layout) 526 return _pnfs_return_layout(ino); 527 528 return 0; 529 } 530 531 static inline bool 532 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 533 struct nfs_server *nfss) 534 { 535 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 536 nfss->pnfs_curr_ld->id == src->l_type); 537 } 538 539 static inline u64 540 pnfs_calc_offset_end(u64 offset, u64 len) 541 { 542 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 543 return NFS4_MAX_UINT64; 544 return offset + len - 1; 545 } 546 547 static inline u64 548 pnfs_calc_offset_length(u64 offset, u64 end) 549 { 550 if (end == NFS4_MAX_UINT64 || end <= offset) 551 return NFS4_MAX_UINT64; 552 return 1 + end - offset; 553 } 554 555 static inline void 556 pnfs_copy_range(struct pnfs_layout_range *dst, 557 const struct pnfs_layout_range *src) 558 { 559 memcpy(dst, src, sizeof(*dst)); 560 } 561 562 static inline u64 563 pnfs_end_offset(u64 start, u64 len) 564 { 565 if (NFS4_MAX_UINT64 - start <= len) 566 return NFS4_MAX_UINT64; 567 return start + len; 568 } 569 570 /* 571 * Are 2 ranges intersecting? 572 * start1 end1 573 * [----------------------------------) 574 * start2 end2 575 * [----------------) 576 */ 577 static inline bool 578 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 579 { 580 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 581 (end2 == NFS4_MAX_UINT64 || start1 < end2); 582 } 583 584 static inline bool 585 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 586 const struct pnfs_layout_range *l2) 587 { 588 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 589 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 590 591 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 592 } 593 594 static inline bool 595 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 596 { 597 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 598 u64 req_last = req_offset(req) + req->wb_bytes; 599 600 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 601 req_offset(req), req_last); 602 } 603 604 extern unsigned int layoutstats_timer; 605 606 #ifdef NFS_DEBUG 607 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 608 #else 609 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 610 { 611 } 612 613 #endif /* NFS_DEBUG */ 614 #else /* CONFIG_NFS_V4_1 */ 615 616 static inline bool nfs_have_layout(struct inode *inode) 617 { 618 return false; 619 } 620 621 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 622 { 623 } 624 625 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 626 { 627 } 628 629 static inline struct pnfs_layout_segment * 630 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 631 { 632 return NULL; 633 } 634 635 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 636 { 637 } 638 639 static inline int pnfs_return_layout(struct inode *ino) 640 { 641 return 0; 642 } 643 644 static inline int pnfs_commit_and_return_layout(struct inode *inode) 645 { 646 return 0; 647 } 648 649 static inline bool 650 pnfs_ld_layoutret_on_setattr(struct inode *inode) 651 { 652 return false; 653 } 654 655 static inline bool 656 pnfs_ld_read_whole_page(struct inode *inode) 657 { 658 return false; 659 } 660 661 static inline int 662 pnfs_sync_inode(struct inode *inode, bool datasync) 663 { 664 return 0; 665 } 666 667 static inline bool 668 pnfs_layoutcommit_outstanding(struct inode *inode) 669 { 670 return false; 671 } 672 673 674 static inline bool 675 pnfs_roc(struct inode *ino, 676 struct nfs4_layoutreturn_args *args, 677 struct nfs4_layoutreturn_res *res, 678 const struct rpc_cred *cred) 679 { 680 return false; 681 } 682 683 static inline void 684 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 685 struct nfs4_layoutreturn_res *res, 686 int ret) 687 { 688 } 689 690 static inline bool 691 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 692 { 693 return false; 694 } 695 696 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 697 const struct nfs_fh *mntfh, 698 struct nfs_fsinfo *fsinfo) 699 { 700 } 701 702 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 703 { 704 } 705 706 static inline int 707 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 708 struct nfs_commit_info *cinfo) 709 { 710 return PNFS_NOT_ATTEMPTED; 711 } 712 713 static inline struct pnfs_ds_commit_info * 714 pnfs_get_ds_info(struct inode *inode) 715 { 716 return NULL; 717 } 718 719 static inline bool 720 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 721 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 722 { 723 return false; 724 } 725 726 static inline bool 727 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 728 { 729 return false; 730 } 731 732 static inline int 733 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 734 int max) 735 { 736 return 0; 737 } 738 739 static inline struct nfs_page * 740 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 741 struct page *page) 742 { 743 return NULL; 744 } 745 746 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 747 { 748 return 0; 749 } 750 751 static inline bool 752 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 753 struct nfs_server *nfss) 754 { 755 return false; 756 } 757 758 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 759 { 760 return NULL; 761 } 762 763 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 764 { 765 } 766 767 #endif /* CONFIG_NFS_V4_1 */ 768 769 #if IS_ENABLED(CONFIG_NFS_V4_2) 770 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 771 #else 772 static inline int 773 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 774 { 775 return 0; 776 } 777 #endif 778 779 #endif /* FS_NFS_PNFS_H */ 780