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_ROC, /* some lseg had roc bit set */ 98 NFS_LAYOUT_RETURN, /* Return this layout ASAP */ 99 NFS_LAYOUT_RETURN_BEFORE_CLOSE, /* Return this layout before close */ 100 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ 101 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ 102 NFS_LAYOUT_RETRY_LAYOUTGET, /* Retry 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); 132 133 void (*return_range) (struct pnfs_layout_hdr *lo, 134 struct pnfs_layout_range *range); 135 136 /* test for nfs page cache coalescing */ 137 const struct nfs_pageio_ops *pg_read_ops; 138 const struct nfs_pageio_ops *pg_write_ops; 139 140 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); 141 void (*mark_request_commit) (struct nfs_page *req, 142 struct pnfs_layout_segment *lseg, 143 struct nfs_commit_info *cinfo, 144 u32 ds_commit_idx); 145 void (*clear_request_commit) (struct nfs_page *req, 146 struct nfs_commit_info *cinfo); 147 int (*scan_commit_lists) (struct nfs_commit_info *cinfo, 148 int max); 149 void (*recover_commit_reqs) (struct list_head *list, 150 struct nfs_commit_info *cinfo); 151 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, 152 struct page *page); 153 int (*commit_pagelist)(struct inode *inode, 154 struct list_head *mds_pages, 155 int how, 156 struct nfs_commit_info *cinfo); 157 158 int (*sync)(struct inode *inode, bool datasync); 159 160 /* 161 * Return PNFS_ATTEMPTED to indicate the layout code has attempted 162 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS 163 */ 164 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); 165 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); 166 167 void (*free_deviceid_node) (struct nfs4_deviceid_node *); 168 struct nfs4_deviceid_node * (*alloc_deviceid_node) 169 (struct nfs_server *server, struct pnfs_device *pdev, 170 gfp_t gfp_flags); 171 172 void (*encode_layoutreturn) (struct pnfs_layout_hdr *layoutid, 173 struct xdr_stream *xdr, 174 const struct nfs4_layoutreturn_args *args); 175 176 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); 177 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); 178 void (*encode_layoutcommit) (struct pnfs_layout_hdr *lo, 179 struct xdr_stream *xdr, 180 const struct nfs4_layoutcommit_args *args); 181 }; 182 183 struct pnfs_layout_hdr { 184 atomic_t plh_refcount; 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 nfs4_stateid plh_stateid; 189 atomic_t plh_outstanding; /* number of RPCs out */ 190 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 191 u32 plh_barrier; /* ignore lower seqids */ 192 unsigned long plh_retry_timestamp; 193 unsigned long plh_flags; 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, 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 void pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg); 233 234 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32); 235 void unset_pnfs_layoutdriver(struct nfs_server *); 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_choose_layoutget_stateid(nfs4_stateid *dst, 259 struct pnfs_layout_hdr *lo, 260 struct pnfs_layout_range *range, 261 struct nfs4_state *open_state); 262 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 263 struct list_head *tmp_list, 264 struct pnfs_layout_range *recall_range); 265 bool pnfs_roc(struct inode *ino); 266 void pnfs_roc_release(struct inode *ino); 267 void pnfs_roc_set_barrier(struct inode *ino, u32 barrier); 268 bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task); 269 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 270 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 271 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 272 int pnfs_generic_sync(struct inode *inode, bool datasync); 273 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 274 int _pnfs_return_layout(struct inode *); 275 int pnfs_commit_and_return_layout(struct inode *); 276 void pnfs_ld_write_done(struct nfs_pgio_header *); 277 void pnfs_ld_read_done(struct nfs_pgio_header *); 278 int pnfs_read_resend_pnfs(struct nfs_pgio_header *); 279 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 280 struct nfs_open_context *ctx, 281 loff_t pos, 282 u64 count, 283 enum pnfs_iomode iomode, 284 gfp_t gfp_flags); 285 void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo); 286 287 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 288 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 289 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 290 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 291 void pnfs_error_mark_layout_for_return(struct inode *inode, 292 struct pnfs_layout_segment *lseg); 293 294 /* nfs4_deviceid_flags */ 295 enum { 296 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 297 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 298 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 299 }; 300 301 /* pnfs_dev.c */ 302 struct nfs4_deviceid_node { 303 struct hlist_node node; 304 struct hlist_node tmpnode; 305 const struct pnfs_layoutdriver_type *ld; 306 const struct nfs_client *nfs_client; 307 unsigned long flags; 308 unsigned long timestamp_unavailable; 309 struct nfs4_deviceid deviceid; 310 struct rcu_head rcu; 311 atomic_t ref; 312 }; 313 314 struct nfs4_deviceid_node * 315 nfs4_find_get_deviceid(struct nfs_server *server, 316 const struct nfs4_deviceid *id, struct rpc_cred *cred, 317 gfp_t gfp_mask); 318 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 319 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 320 const struct nfs4_deviceid *); 321 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 322 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 323 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 324 void nfs4_deviceid_purge_client(const struct nfs_client *); 325 326 /* pnfs_nfs.c */ 327 void pnfs_generic_clear_request_commit(struct nfs_page *req, 328 struct nfs_commit_info *cinfo); 329 void pnfs_generic_commit_release(void *calldata); 330 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 331 void pnfs_generic_rw_release(void *data); 332 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 333 struct nfs_commit_info *cinfo); 334 int pnfs_generic_commit_pagelist(struct inode *inode, 335 struct list_head *mds_pages, 336 int how, 337 struct nfs_commit_info *cinfo, 338 int (*initiate_commit)(struct nfs_commit_data *data, 339 int how)); 340 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 341 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 342 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 343 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 344 gfp_t gfp_flags); 345 void nfs4_pnfs_v3_ds_connect_unload(void); 346 void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 347 struct nfs4_deviceid_node *devid, unsigned int timeo, 348 unsigned int retrans, u32 version, u32 minor_version, 349 rpc_authflavor_t au_flavor); 350 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 351 struct xdr_stream *xdr, 352 gfp_t gfp_flags); 353 void pnfs_layout_mark_request_commit(struct nfs_page *req, 354 struct pnfs_layout_segment *lseg, 355 struct nfs_commit_info *cinfo, 356 u32 ds_commit_idx); 357 358 static inline bool nfs_have_layout(struct inode *inode) 359 { 360 return NFS_I(inode)->layout != NULL; 361 } 362 363 static inline struct nfs4_deviceid_node * 364 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 365 { 366 atomic_inc(&d->ref); 367 return d; 368 } 369 370 static inline void pnfs_set_retry_layoutget(struct pnfs_layout_hdr *lo) 371 { 372 if (!test_and_set_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) 373 atomic_inc(&lo->plh_refcount); 374 } 375 376 static inline void pnfs_clear_retry_layoutget(struct pnfs_layout_hdr *lo) 377 { 378 if (test_and_clear_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) { 379 atomic_dec(&lo->plh_refcount); 380 /* wake up waiters for LAYOUTRETURN as that is not needed */ 381 wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); 382 } 383 } 384 385 static inline bool pnfs_should_retry_layoutget(struct pnfs_layout_hdr *lo) 386 { 387 return test_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags); 388 } 389 390 static inline struct pnfs_layout_segment * 391 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 392 { 393 if (lseg) { 394 atomic_inc(&lseg->pls_refcount); 395 smp_mb__after_atomic(); 396 } 397 return lseg; 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 #ifdef NFS_DEBUG 532 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 533 #else 534 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 535 { 536 } 537 #endif /* NFS_DEBUG */ 538 #else /* CONFIG_NFS_V4_1 */ 539 540 static inline bool nfs_have_layout(struct inode *inode) 541 { 542 return false; 543 } 544 545 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 546 { 547 } 548 549 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 550 { 551 } 552 553 static inline struct pnfs_layout_segment * 554 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 555 { 556 return NULL; 557 } 558 559 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 560 { 561 } 562 563 static inline int pnfs_return_layout(struct inode *ino) 564 { 565 return 0; 566 } 567 568 static inline int pnfs_commit_and_return_layout(struct inode *inode) 569 { 570 return 0; 571 } 572 573 static inline bool 574 pnfs_ld_layoutret_on_setattr(struct inode *inode) 575 { 576 return false; 577 } 578 579 static inline bool 580 pnfs_ld_read_whole_page(struct inode *inode) 581 { 582 return false; 583 } 584 585 static inline int 586 pnfs_sync_inode(struct inode *inode, bool datasync) 587 { 588 return 0; 589 } 590 591 static inline bool 592 pnfs_roc(struct inode *ino) 593 { 594 return false; 595 } 596 597 static inline void 598 pnfs_roc_release(struct inode *ino) 599 { 600 } 601 602 static inline void 603 pnfs_roc_set_barrier(struct inode *ino, u32 barrier) 604 { 605 } 606 607 static inline bool 608 pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task) 609 { 610 return false; 611 } 612 613 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 614 const struct nfs_fh *mntfh, u32 id) 615 { 616 } 617 618 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 619 { 620 } 621 622 static inline int 623 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 624 struct nfs_commit_info *cinfo) 625 { 626 return PNFS_NOT_ATTEMPTED; 627 } 628 629 static inline struct pnfs_ds_commit_info * 630 pnfs_get_ds_info(struct inode *inode) 631 { 632 return NULL; 633 } 634 635 static inline bool 636 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 637 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 638 { 639 return false; 640 } 641 642 static inline bool 643 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 644 { 645 return false; 646 } 647 648 static inline int 649 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 650 int max) 651 { 652 return 0; 653 } 654 655 static inline struct nfs_page * 656 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 657 struct page *page) 658 { 659 return NULL; 660 } 661 662 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 663 { 664 return 0; 665 } 666 667 static inline bool 668 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 669 struct nfs_server *nfss) 670 { 671 return false; 672 } 673 674 static inline bool 675 pnfs_layoutcommit_outstanding(struct inode *inode) 676 { 677 return false; 678 } 679 680 681 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 682 { 683 return NULL; 684 } 685 686 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 687 { 688 } 689 690 #endif /* CONFIG_NFS_V4_1 */ 691 692 #endif /* FS_NFS_PNFS_H */ 693