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 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); 182 void (*cleanup_layoutstats) (struct nfs42_layoutstat_data *data); 183 }; 184 185 struct pnfs_layout_hdr { 186 atomic_t plh_refcount; 187 struct list_head plh_layouts; /* other client layouts */ 188 struct list_head plh_bulk_destroy; 189 struct list_head plh_segs; /* layout segments list */ 190 nfs4_stateid plh_stateid; 191 atomic_t plh_outstanding; /* number of RPCs out */ 192 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 193 u32 plh_barrier; /* ignore lower seqids */ 194 unsigned long plh_retry_timestamp; 195 unsigned long plh_flags; 196 enum pnfs_iomode plh_return_iomode; 197 loff_t plh_lwb; /* last write byte for layoutcommit */ 198 struct rpc_cred *plh_lc_cred; /* layoutcommit cred */ 199 struct inode *plh_inode; 200 }; 201 202 struct pnfs_device { 203 struct nfs4_deviceid dev_id; 204 unsigned int layout_type; 205 unsigned int mincount; 206 unsigned int maxcount; /* gdia_maxcount */ 207 struct page **pages; 208 unsigned int pgbase; 209 unsigned int pglen; /* reply buffer length */ 210 unsigned char nocache : 1;/* May not be cached */ 211 }; 212 213 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 214 215 struct pnfs_devicelist { 216 unsigned int eof; 217 unsigned int num_devs; 218 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 219 }; 220 221 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 222 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 223 224 /* nfs4proc.c */ 225 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 226 struct pnfs_device *dev, 227 struct rpc_cred *cred); 228 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags); 229 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); 230 231 /* pnfs.c */ 232 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 233 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 234 void pnfs_put_lseg_locked(struct pnfs_layout_segment *lseg); 235 236 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32); 237 void unset_pnfs_layoutdriver(struct nfs_server *); 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_choose_layoutget_stateid(nfs4_stateid *dst, 261 struct pnfs_layout_hdr *lo, 262 struct pnfs_layout_range *range, 263 struct nfs4_state *open_state); 264 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 265 struct list_head *tmp_list, 266 struct pnfs_layout_range *recall_range); 267 bool pnfs_roc(struct inode *ino); 268 void pnfs_roc_release(struct inode *ino); 269 void pnfs_roc_set_barrier(struct inode *ino, u32 barrier); 270 bool pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task); 271 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 272 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 273 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 274 int pnfs_generic_sync(struct inode *inode, bool datasync); 275 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 276 int _pnfs_return_layout(struct inode *); 277 int pnfs_commit_and_return_layout(struct inode *); 278 void pnfs_ld_write_done(struct nfs_pgio_header *); 279 void pnfs_ld_read_done(struct nfs_pgio_header *); 280 int pnfs_read_resend_pnfs(struct nfs_pgio_header *); 281 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 282 struct nfs_open_context *ctx, 283 loff_t pos, 284 u64 count, 285 enum pnfs_iomode iomode, 286 gfp_t gfp_flags); 287 void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo); 288 289 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 290 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 291 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 292 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 293 void pnfs_error_mark_layout_for_return(struct inode *inode, 294 struct pnfs_layout_segment *lseg); 295 /* nfs4_deviceid_flags */ 296 enum { 297 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 298 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 299 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 300 }; 301 302 /* pnfs_dev.c */ 303 struct nfs4_deviceid_node { 304 struct hlist_node node; 305 struct hlist_node tmpnode; 306 const struct pnfs_layoutdriver_type *ld; 307 const struct nfs_client *nfs_client; 308 unsigned long flags; 309 unsigned long timestamp_unavailable; 310 struct nfs4_deviceid deviceid; 311 struct rcu_head rcu; 312 atomic_t ref; 313 }; 314 315 struct nfs4_deviceid_node * 316 nfs4_find_get_deviceid(struct nfs_server *server, 317 const struct nfs4_deviceid *id, struct rpc_cred *cred, 318 gfp_t gfp_mask); 319 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 320 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 321 const struct nfs4_deviceid *); 322 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 323 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 324 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 325 void nfs4_deviceid_purge_client(const struct nfs_client *); 326 327 /* pnfs_nfs.c */ 328 void pnfs_generic_clear_request_commit(struct nfs_page *req, 329 struct nfs_commit_info *cinfo); 330 void pnfs_generic_commit_release(void *calldata); 331 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 332 void pnfs_generic_rw_release(void *data); 333 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 334 struct nfs_commit_info *cinfo); 335 int pnfs_generic_commit_pagelist(struct inode *inode, 336 struct list_head *mds_pages, 337 int how, 338 struct nfs_commit_info *cinfo, 339 int (*initiate_commit)(struct nfs_commit_data *data, 340 int how)); 341 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 342 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 343 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 344 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 345 gfp_t gfp_flags); 346 void nfs4_pnfs_v3_ds_connect_unload(void); 347 void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 348 struct nfs4_deviceid_node *devid, unsigned int timeo, 349 unsigned int retrans, u32 version, u32 minor_version, 350 rpc_authflavor_t au_flavor); 351 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 352 struct xdr_stream *xdr, 353 gfp_t gfp_flags); 354 void pnfs_layout_mark_request_commit(struct nfs_page *req, 355 struct pnfs_layout_segment *lseg, 356 struct nfs_commit_info *cinfo, 357 u32 ds_commit_idx); 358 359 static inline bool nfs_have_layout(struct inode *inode) 360 { 361 return NFS_I(inode)->layout != NULL; 362 } 363 364 static inline struct nfs4_deviceid_node * 365 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 366 { 367 atomic_inc(&d->ref); 368 return d; 369 } 370 371 static inline void pnfs_set_retry_layoutget(struct pnfs_layout_hdr *lo) 372 { 373 if (!test_and_set_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) 374 atomic_inc(&lo->plh_refcount); 375 } 376 377 static inline void pnfs_clear_retry_layoutget(struct pnfs_layout_hdr *lo) 378 { 379 if (test_and_clear_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags)) { 380 atomic_dec(&lo->plh_refcount); 381 /* wake up waiters for LAYOUTRETURN as that is not needed */ 382 wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); 383 } 384 } 385 386 static inline bool pnfs_should_retry_layoutget(struct pnfs_layout_hdr *lo) 387 { 388 return test_bit(NFS_LAYOUT_RETRY_LAYOUTGET, &lo->plh_flags); 389 } 390 391 static inline struct pnfs_layout_segment * 392 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 393 { 394 if (lseg) { 395 atomic_inc(&lseg->pls_refcount); 396 smp_mb__after_atomic(); 397 } 398 return lseg; 399 } 400 401 /* Return true if a layout driver is being used for this mountpoint */ 402 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 403 { 404 return nfss->pnfs_curr_ld != NULL; 405 } 406 407 static inline int 408 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 409 struct nfs_commit_info *cinfo) 410 { 411 if (cinfo->ds == NULL || cinfo->ds->ncommitting == 0) 412 return PNFS_NOT_ATTEMPTED; 413 return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how, cinfo); 414 } 415 416 static inline struct pnfs_ds_commit_info * 417 pnfs_get_ds_info(struct inode *inode) 418 { 419 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 420 421 if (ld == NULL || ld->get_ds_info == NULL) 422 return NULL; 423 return ld->get_ds_info(inode); 424 } 425 426 static inline void 427 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 428 { 429 set_bit(NFS_DEVICEID_INVALID, &node->flags); 430 } 431 432 static inline bool 433 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 434 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 435 { 436 struct inode *inode = d_inode(req->wb_context->dentry); 437 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 438 439 if (lseg == NULL || ld->mark_request_commit == NULL) 440 return false; 441 ld->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 442 return true; 443 } 444 445 static inline bool 446 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 447 { 448 struct inode *inode = d_inode(req->wb_context->dentry); 449 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 450 451 if (ld == NULL || ld->clear_request_commit == NULL) 452 return false; 453 ld->clear_request_commit(req, cinfo); 454 return true; 455 } 456 457 static inline int 458 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 459 int max) 460 { 461 if (cinfo->ds == NULL || cinfo->ds->nwritten == 0) 462 return 0; 463 else 464 return NFS_SERVER(inode)->pnfs_curr_ld->scan_commit_lists(cinfo, max); 465 } 466 467 static inline struct nfs_page * 468 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 469 struct page *page) 470 { 471 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 472 473 if (ld == NULL || ld->search_commit_reqs == NULL) 474 return NULL; 475 return ld->search_commit_reqs(cinfo, page); 476 } 477 478 /* Should the pNFS client commit and return the layout upon a setattr */ 479 static inline bool 480 pnfs_ld_layoutret_on_setattr(struct inode *inode) 481 { 482 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 483 return false; 484 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 485 PNFS_LAYOUTRET_ON_SETATTR; 486 } 487 488 static inline bool 489 pnfs_ld_read_whole_page(struct inode *inode) 490 { 491 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 492 return false; 493 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 494 } 495 496 static inline int 497 pnfs_sync_inode(struct inode *inode, bool datasync) 498 { 499 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 500 return 0; 501 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 502 } 503 504 static inline bool 505 pnfs_layoutcommit_outstanding(struct inode *inode) 506 { 507 struct nfs_inode *nfsi = NFS_I(inode); 508 509 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 510 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 511 } 512 513 static inline int pnfs_return_layout(struct inode *ino) 514 { 515 struct nfs_inode *nfsi = NFS_I(ino); 516 struct nfs_server *nfss = NFS_SERVER(ino); 517 518 if (pnfs_enabled_sb(nfss) && nfsi->layout) 519 return _pnfs_return_layout(ino); 520 521 return 0; 522 } 523 524 static inline bool 525 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 526 struct nfs_server *nfss) 527 { 528 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 529 nfss->pnfs_curr_ld->id == src->l_type); 530 } 531 532 #ifdef NFS_DEBUG 533 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 534 #else 535 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 536 { 537 } 538 #endif /* NFS_DEBUG */ 539 #else /* CONFIG_NFS_V4_1 */ 540 541 static inline bool nfs_have_layout(struct inode *inode) 542 { 543 return false; 544 } 545 546 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 547 { 548 } 549 550 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 551 { 552 } 553 554 static inline struct pnfs_layout_segment * 555 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 556 { 557 return NULL; 558 } 559 560 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 561 { 562 } 563 564 static inline int pnfs_return_layout(struct inode *ino) 565 { 566 return 0; 567 } 568 569 static inline int pnfs_commit_and_return_layout(struct inode *inode) 570 { 571 return 0; 572 } 573 574 static inline bool 575 pnfs_ld_layoutret_on_setattr(struct inode *inode) 576 { 577 return false; 578 } 579 580 static inline bool 581 pnfs_ld_read_whole_page(struct inode *inode) 582 { 583 return false; 584 } 585 586 static inline int 587 pnfs_sync_inode(struct inode *inode, bool datasync) 588 { 589 return 0; 590 } 591 592 static inline bool 593 pnfs_roc(struct inode *ino) 594 { 595 return false; 596 } 597 598 static inline void 599 pnfs_roc_release(struct inode *ino) 600 { 601 } 602 603 static inline void 604 pnfs_roc_set_barrier(struct inode *ino, u32 barrier) 605 { 606 } 607 608 static inline bool 609 pnfs_roc_drain(struct inode *ino, u32 *barrier, struct rpc_task *task) 610 { 611 return false; 612 } 613 614 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 615 const struct nfs_fh *mntfh, u32 id) 616 { 617 } 618 619 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 620 { 621 } 622 623 static inline int 624 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 625 struct nfs_commit_info *cinfo) 626 { 627 return PNFS_NOT_ATTEMPTED; 628 } 629 630 static inline struct pnfs_ds_commit_info * 631 pnfs_get_ds_info(struct inode *inode) 632 { 633 return NULL; 634 } 635 636 static inline bool 637 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 638 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 639 { 640 return false; 641 } 642 643 static inline bool 644 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 645 { 646 return false; 647 } 648 649 static inline int 650 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 651 int max) 652 { 653 return 0; 654 } 655 656 static inline struct nfs_page * 657 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 658 struct page *page) 659 { 660 return NULL; 661 } 662 663 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 664 { 665 return 0; 666 } 667 668 static inline bool 669 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 670 struct nfs_server *nfss) 671 { 672 return false; 673 } 674 675 static inline bool 676 pnfs_layoutcommit_outstanding(struct inode *inode) 677 { 678 return false; 679 } 680 681 682 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 683 { 684 return NULL; 685 } 686 687 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 688 { 689 } 690 691 #endif /* CONFIG_NFS_V4_1 */ 692 693 #if IS_ENABLED(CONFIG_NFS_V4_2) 694 int pnfs_report_layoutstat(struct inode *inode); 695 #else 696 static inline int 697 pnfs_report_layoutstat(struct inode *inode) 698 { 699 return 0; 700 } 701 #endif 702 703 #endif /* FS_NFS_PNFS_H */ 704