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 unsigned long pls_flags; 68 struct pnfs_layout_hdr *pls_layout; 69 struct work_struct pls_work; 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, /* Return this layout ASAP */ 98 NFS_LAYOUT_RETURN_BEFORE_CLOSE, /* Return this layout before close */ 99 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ 100 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ 101 }; 102 103 enum layoutdriver_policy_flags { 104 /* Should the pNFS client commit and return the layout upon truncate to 105 * a smaller size */ 106 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, 107 PNFS_LAYOUTRET_ON_ERROR = 1 << 1, 108 PNFS_READ_WHOLE_PAGE = 1 << 2, 109 }; 110 111 struct nfs4_deviceid_node; 112 113 /* Per-layout driver specific registration structure */ 114 struct pnfs_layoutdriver_type { 115 struct list_head pnfs_tblid; 116 const u32 id; 117 const char *name; 118 struct module *owner; 119 unsigned flags; 120 unsigned max_deviceinfo_size; 121 122 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); 123 int (*clear_layoutdriver) (struct nfs_server *); 124 125 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); 126 void (*free_layout_hdr) (struct pnfs_layout_hdr *); 127 128 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); 129 void (*free_lseg) (struct pnfs_layout_segment *lseg); 130 void (*add_lseg) (struct pnfs_layout_hdr *layoutid, 131 struct pnfs_layout_segment *lseg, 132 struct list_head *free_me); 133 134 void (*return_range) (struct pnfs_layout_hdr *lo, 135 struct pnfs_layout_range *range); 136 137 /* test for nfs page cache coalescing */ 138 const struct nfs_pageio_ops *pg_read_ops; 139 const struct nfs_pageio_ops *pg_write_ops; 140 141 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); 142 void (*mark_request_commit) (struct nfs_page *req, 143 struct pnfs_layout_segment *lseg, 144 struct nfs_commit_info *cinfo, 145 u32 ds_commit_idx); 146 void (*clear_request_commit) (struct nfs_page *req, 147 struct nfs_commit_info *cinfo); 148 int (*scan_commit_lists) (struct nfs_commit_info *cinfo, 149 int max); 150 void (*recover_commit_reqs) (struct list_head *list, 151 struct nfs_commit_info *cinfo); 152 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, 153 struct page *page); 154 int (*commit_pagelist)(struct inode *inode, 155 struct list_head *mds_pages, 156 int how, 157 struct nfs_commit_info *cinfo); 158 159 int (*sync)(struct inode *inode, bool datasync); 160 161 /* 162 * Return PNFS_ATTEMPTED to indicate the layout code has attempted 163 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS 164 */ 165 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); 166 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); 167 168 void (*free_deviceid_node) (struct nfs4_deviceid_node *); 169 struct nfs4_deviceid_node * (*alloc_deviceid_node) 170 (struct nfs_server *server, struct pnfs_device *pdev, 171 gfp_t gfp_flags); 172 173 void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid, 174 struct xdr_stream *xdr, 175 const struct nfs4_layoutreturn_args *args); 176 177 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); 178 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); 179 void (*encode_layoutcommit) (struct pnfs_layout_hdr *lo, 180 struct xdr_stream *xdr, 181 const struct nfs4_layoutcommit_args *args); 182 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); 183 void (*cleanup_layoutstats) (struct nfs42_layoutstat_data *data); 184 }; 185 186 struct pnfs_layout_hdr { 187 atomic_t plh_refcount; 188 atomic_t plh_outstanding; /* number of RPCs out */ 189 struct list_head plh_layouts; /* other client layouts */ 190 struct list_head plh_bulk_destroy; 191 struct list_head plh_segs; /* layout segments list */ 192 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 193 unsigned long plh_retry_timestamp; 194 unsigned long plh_flags; 195 nfs4_stateid plh_stateid; 196 u32 plh_barrier; /* ignore lower seqids */ 197 enum pnfs_iomode plh_return_iomode; 198 loff_t plh_lwb; /* last write byte for layoutcommit */ 199 struct rpc_cred *plh_lc_cred; /* layoutcommit cred */ 200 struct inode *plh_inode; 201 }; 202 203 struct pnfs_device { 204 struct nfs4_deviceid dev_id; 205 unsigned int layout_type; 206 unsigned int mincount; 207 unsigned int maxcount; /* gdia_maxcount */ 208 struct page **pages; 209 unsigned int pgbase; 210 unsigned int pglen; /* reply buffer length */ 211 unsigned char nocache : 1;/* May not be cached */ 212 }; 213 214 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 215 216 struct pnfs_devicelist { 217 unsigned int eof; 218 unsigned int num_devs; 219 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 220 }; 221 222 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 223 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 224 225 /* nfs4proc.c */ 226 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 227 struct pnfs_device *dev, 228 struct rpc_cred *cred); 229 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags); 230 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); 231 232 /* pnfs.c */ 233 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 234 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 235 void pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg); 236 237 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32); 238 void unset_pnfs_layoutdriver(struct nfs_server *); 239 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 240 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 241 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 242 struct nfs_page *req, u64 wb_size); 243 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 244 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 245 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 246 struct nfs_page *prev, struct nfs_page *req); 247 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 248 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 249 void pnfs_free_lseg_list(struct list_head *tmp_list); 250 void pnfs_destroy_layout(struct nfs_inode *); 251 void pnfs_destroy_all_layouts(struct nfs_client *); 252 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, 253 struct nfs_fsid *fsid, 254 bool is_recall); 255 int pnfs_destroy_layouts_byclid(struct nfs_client *clp, 256 bool is_recall); 257 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 258 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 259 const nfs4_stateid *new, 260 bool update_barrier); 261 int pnfs_choose_layoutget_stateid(nfs4_stateid *dst, 262 struct pnfs_layout_hdr *lo, 263 const struct pnfs_layout_range *range, 264 struct nfs4_state *open_state); 265 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 266 struct list_head *tmp_list, 267 const struct pnfs_layout_range *recall_range); 268 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 269 struct list_head *tmp_list, 270 const struct pnfs_layout_range *recall_range); 271 bool pnfs_roc(struct inode *ino); 272 void pnfs_roc_release(struct inode *ino); 273 void pnfs_roc_set_barrier(struct inode *ino, u32 barrier); 274 void pnfs_roc_get_barrier(struct inode *ino, u32 *barrier); 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 int 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 gfp_t gfp_flags); 292 void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo); 293 294 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 295 struct pnfs_layout_segment *lseg, 296 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 297 const struct pnfs_layout_range *old), 298 bool (*do_merge)(struct pnfs_layout_segment *lseg, 299 struct pnfs_layout_segment *old), 300 struct list_head *free_me); 301 302 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 303 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 304 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 305 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 306 void pnfs_error_mark_layout_for_return(struct inode *inode, 307 struct pnfs_layout_segment *lseg); 308 /* nfs4_deviceid_flags */ 309 enum { 310 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 311 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 312 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 313 }; 314 315 /* pnfs_dev.c */ 316 struct nfs4_deviceid_node { 317 struct hlist_node node; 318 struct hlist_node tmpnode; 319 const struct pnfs_layoutdriver_type *ld; 320 const struct nfs_client *nfs_client; 321 unsigned long flags; 322 unsigned long timestamp_unavailable; 323 struct nfs4_deviceid deviceid; 324 struct rcu_head rcu; 325 atomic_t ref; 326 }; 327 328 struct nfs4_deviceid_node * 329 nfs4_find_get_deviceid(struct nfs_server *server, 330 const struct nfs4_deviceid *id, struct rpc_cred *cred, 331 gfp_t gfp_mask); 332 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 333 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 334 const struct nfs4_deviceid *); 335 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 336 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 337 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 338 void nfs4_deviceid_purge_client(const struct nfs_client *); 339 340 /* pnfs_nfs.c */ 341 void pnfs_generic_clear_request_commit(struct nfs_page *req, 342 struct nfs_commit_info *cinfo); 343 void pnfs_generic_commit_release(void *calldata); 344 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 345 void pnfs_generic_rw_release(void *data); 346 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 347 struct nfs_commit_info *cinfo); 348 int pnfs_generic_commit_pagelist(struct inode *inode, 349 struct list_head *mds_pages, 350 int how, 351 struct nfs_commit_info *cinfo, 352 int (*initiate_commit)(struct nfs_commit_data *data, 353 int how)); 354 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 355 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 356 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 357 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 358 gfp_t gfp_flags); 359 void nfs4_pnfs_v3_ds_connect_unload(void); 360 void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 361 struct nfs4_deviceid_node *devid, unsigned int timeo, 362 unsigned int retrans, u32 version, u32 minor_version, 363 rpc_authflavor_t au_flavor); 364 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 365 struct xdr_stream *xdr, 366 gfp_t gfp_flags); 367 void pnfs_layout_mark_request_commit(struct nfs_page *req, 368 struct pnfs_layout_segment *lseg, 369 struct nfs_commit_info *cinfo, 370 u32 ds_commit_idx); 371 372 static inline bool nfs_have_layout(struct inode *inode) 373 { 374 return NFS_I(inode)->layout != NULL; 375 } 376 377 static inline struct nfs4_deviceid_node * 378 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 379 { 380 atomic_inc(&d->ref); 381 return d; 382 } 383 384 static inline struct pnfs_layout_segment * 385 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 386 { 387 if (lseg) { 388 atomic_inc(&lseg->pls_refcount); 389 smp_mb__after_atomic(); 390 } 391 return lseg; 392 } 393 394 static inline bool 395 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 396 { 397 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 398 } 399 400 /* Return true if a layout driver is being used for this mountpoint */ 401 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 402 { 403 return nfss->pnfs_curr_ld != NULL; 404 } 405 406 static inline int 407 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 408 struct nfs_commit_info *cinfo) 409 { 410 if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) 411 return PNFS_NOT_ATTEMPTED; 412 return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); 413 } 414 415 static inline struct pnfs_ds_commit_info * 416 pnfs_get_ds_info(struct inode *inode) 417 { 418 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 419 420 if (ld == NULL || ld->get_ds_info == NULL) 421 return NULL; 422 return ld->get_ds_info(inode); 423 } 424 425 static inline void 426 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 427 { 428 set_bit(NFS_DEVICEID_INVALID, &node->flags); 429 } 430 431 static inline bool 432 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 433 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 434 { 435 struct inode *inode = d_inode(req->wb_context->dentry); 436 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 437 438 if (lseg == NULL || ld->mark_request_commit == NULL) 439 return false; 440 ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 441 return true; 442 } 443 444 static inline bool 445 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 446 { 447 struct inode *inode = d_inode(req->wb_context->dentry); 448 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 449 450 if (ld == NULL || ld->clear_request_commit == NULL) 451 return false; 452 ld->clear_request_commit(req, cinfo); 453 return true; 454 } 455 456 static inline int 457 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 458 int max) 459 { 460 if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) 461 return 0; 462 else 463 return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); 464 } 465 466 static inline struct nfs_page * 467 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 468 struct page *page) 469 { 470 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 471 472 if (ld == NULL || ld->search_commit_reqs == NULL) 473 return NULL; 474 return ld->search_commit_reqs(cinfo, page); 475 } 476 477 /* Should the pNFS client commit and return the layout upon a setattr */ 478 static inline bool 479 pnfs_ld_layoutret_on_setattr(struct inode *inode) 480 { 481 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 482 return false; 483 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 484 PNFS_LAYOUTRET_ON_SETATTR; 485 } 486 487 static inline bool 488 pnfs_ld_read_whole_page(struct inode *inode) 489 { 490 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 491 return false; 492 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 493 } 494 495 static inline int 496 pnfs_sync_inode(struct inode *inode, bool datasync) 497 { 498 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 499 return 0; 500 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 501 } 502 503 static inline bool 504 pnfs_layoutcommit_outstanding(struct inode *inode) 505 { 506 struct nfs_inode *nfsi = NFS_I(inode); 507 508 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 509 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 510 } 511 512 static inline int pnfs_return_layout(struct inode *ino) 513 { 514 struct nfs_inode *nfsi = NFS_I(ino); 515 struct nfs_server *nfss = NFS_SERVER(ino); 516 517 if (pnfs_enabled_sb(nfss) && nfsi->layout) 518 return _pnfs_return_layout(ino); 519 520 return 0; 521 } 522 523 static inline bool 524 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 525 struct nfs_server *nfss) 526 { 527 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 528 nfss->pnfs_curr_ld->id == src->l_type); 529 } 530 531 static inline u64 532 pnfs_calc_offset_end(u64 offset, u64 len) 533 { 534 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 535 return NFS4_MAX_UINT64; 536 return offset + len - 1; 537 } 538 539 static inline u64 540 pnfs_calc_offset_length(u64 offset, u64 end) 541 { 542 if (end == NFS4_MAX_UINT64 || end <= offset) 543 return NFS4_MAX_UINT64; 544 return 1 + end - offset; 545 } 546 547 /** 548 * pnfs_mark_layout_returned_if_empty - marks the layout as returned 549 * @lo: layout header 550 * 551 * Note: Caller must hold inode->i_lock 552 */ 553 static inline void 554 pnfs_mark_layout_returned_if_empty(struct pnfs_layout_hdr *lo) 555 { 556 if (list_empty(&lo->plh_segs)) 557 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); 558 } 559 560 static inline void 561 pnfs_copy_range(struct pnfs_layout_range *dst, 562 const struct pnfs_layout_range *src) 563 { 564 memcpy(dst, src, sizeof(*dst)); 565 } 566 567 extern unsigned int layoutstats_timer; 568 569 #ifdef NFS_DEBUG 570 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 571 #else 572 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 573 { 574 } 575 576 #endif /* NFS_DEBUG */ 577 #else /* CONFIG_NFS_V4_1 */ 578 579 static inline bool nfs_have_layout(struct inode *inode) 580 { 581 return false; 582 } 583 584 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 585 { 586 } 587 588 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 589 { 590 } 591 592 static inline struct pnfs_layout_segment * 593 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 594 { 595 return NULL; 596 } 597 598 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 599 { 600 } 601 602 static inline int pnfs_return_layout(struct inode *ino) 603 { 604 return 0; 605 } 606 607 static inline int pnfs_commit_and_return_layout(struct inode *inode) 608 { 609 return 0; 610 } 611 612 static inline bool 613 pnfs_ld_layoutret_on_setattr(struct inode *inode) 614 { 615 return false; 616 } 617 618 static inline bool 619 pnfs_ld_read_whole_page(struct inode *inode) 620 { 621 return false; 622 } 623 624 static inline int 625 pnfs_sync_inode(struct inode *inode, bool datasync) 626 { 627 return 0; 628 } 629 630 static inline bool 631 pnfs_roc(struct inode *ino) 632 { 633 return false; 634 } 635 636 static inline void 637 pnfs_roc_release(struct inode *ino) 638 { 639 } 640 641 static inline void 642 pnfs_roc_set_barrier(struct inode *ino, u32 barrier) 643 { 644 } 645 646 static inline void 647 pnfs_roc_get_barrier(struct inode *ino, u32 *barrier) 648 { 649 } 650 651 static inline bool 652 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 653 { 654 return false; 655 } 656 657 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 658 const struct nfs_fh *mntfh, u32 id) 659 { 660 } 661 662 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 663 { 664 } 665 666 static inline int 667 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 668 struct nfs_commit_info *cinfo) 669 { 670 return PNFS_NOT_ATTEMPTED; 671 } 672 673 static inline struct pnfs_ds_commit_info * 674 pnfs_get_ds_info(struct inode *inode) 675 { 676 return NULL; 677 } 678 679 static inline bool 680 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 681 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 682 { 683 return false; 684 } 685 686 static inline bool 687 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 688 { 689 return false; 690 } 691 692 static inline int 693 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 694 int max) 695 { 696 return 0; 697 } 698 699 static inline struct nfs_page * 700 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 701 struct page *page) 702 { 703 return NULL; 704 } 705 706 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 707 { 708 return 0; 709 } 710 711 static inline bool 712 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 713 struct nfs_server *nfss) 714 { 715 return false; 716 } 717 718 static inline bool 719 pnfs_layoutcommit_outstanding(struct inode *inode) 720 { 721 return false; 722 } 723 724 725 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 726 { 727 return NULL; 728 } 729 730 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 731 { 732 } 733 734 #endif /* CONFIG_NFS_V4_1 */ 735 736 #if IS_ENABLED(CONFIG_NFS_V4_2) 737 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 738 #else 739 static inline int 740 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 741 { 742 return 0; 743 } 744 #endif 745 746 #endif /* FS_NFS_PNFS_H */ 747