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/refcount.h> 34 #include <linux/nfs_fs.h> 35 #include <linux/nfs_page.h> 36 #include <linux/workqueue.h> 37 38 struct nfs4_opendata; 39 40 enum { 41 NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */ 42 NFS_LSEG_ROC, /* roc bit received from server */ 43 NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */ 44 NFS_LSEG_LAYOUTRETURN, /* layoutreturn bit set for layoutreturn */ 45 NFS_LSEG_UNAVAILABLE, /* unavailable bit set for temporary problem */ 46 }; 47 48 /* Individual ip address */ 49 struct nfs4_pnfs_ds_addr { 50 struct sockaddr_storage da_addr; 51 size_t da_addrlen; 52 struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 53 char *da_remotestr; /* human readable addr+port */ 54 }; 55 56 struct nfs4_pnfs_ds { 57 struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 58 char *ds_remotestr; /* comma sep list of addrs */ 59 struct list_head ds_addrs; 60 struct nfs_client *ds_clp; 61 refcount_t ds_count; 62 unsigned long ds_state; 63 #define NFS4DS_CONNECTING 0 /* ds is establishing connection */ 64 }; 65 66 struct pnfs_layout_segment { 67 struct list_head pls_list; 68 struct list_head pls_lc_list; 69 struct list_head pls_commits; 70 struct pnfs_layout_range pls_range; 71 refcount_t pls_refcount; 72 u32 pls_seq; 73 unsigned long pls_flags; 74 struct pnfs_layout_hdr *pls_layout; 75 }; 76 77 enum pnfs_try_status { 78 PNFS_ATTEMPTED = 0, 79 PNFS_NOT_ATTEMPTED = 1, 80 PNFS_TRY_AGAIN = 2, 81 }; 82 83 /* error codes for internal use */ 84 #define NFS4ERR_RESET_TO_MDS 12001 85 #define NFS4ERR_RESET_TO_PNFS 12002 86 87 #ifdef CONFIG_NFS_V4_1 88 89 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" 90 91 /* 92 * Default data server connection timeout and retrans vaules. 93 * Set by module parameters dataserver_timeo and dataserver_retrans. 94 */ 95 #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */ 96 #define NFS4_DEF_DS_RETRANS 5 97 #define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ) 98 99 enum { 100 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ 101 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ 102 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ 103 NFS_LAYOUT_RETURN, /* layoutreturn in progress */ 104 NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */ 105 NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */ 106 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ 107 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ 108 NFS_LAYOUT_INODE_FREEING, /* The inode is being freed */ 109 NFS_LAYOUT_HASHED, /* The layout visible */ 110 }; 111 112 enum layoutdriver_policy_flags { 113 /* Should the pNFS client commit and return the layout upon truncate to 114 * a smaller size */ 115 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, 116 PNFS_LAYOUTRET_ON_ERROR = 1 << 1, 117 PNFS_READ_WHOLE_PAGE = 1 << 2, 118 PNFS_LAYOUTGET_ON_OPEN = 1 << 3, 119 }; 120 121 struct nfs4_deviceid_node; 122 123 /* Per-layout driver specific registration structure */ 124 struct pnfs_layoutdriver_type { 125 struct list_head pnfs_tblid; 126 const u32 id; 127 const char *name; 128 struct module *owner; 129 unsigned flags; 130 unsigned max_deviceinfo_size; 131 unsigned max_layoutget_response; 132 133 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); 134 int (*clear_layoutdriver) (struct nfs_server *); 135 136 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); 137 void (*free_layout_hdr) (struct pnfs_layout_hdr *); 138 139 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); 140 void (*free_lseg) (struct pnfs_layout_segment *lseg); 141 void (*add_lseg) (struct pnfs_layout_hdr *layoutid, 142 struct pnfs_layout_segment *lseg, 143 struct list_head *free_me); 144 145 void (*return_range) (struct pnfs_layout_hdr *lo, 146 struct pnfs_layout_range *range); 147 148 /* test for nfs page cache coalescing */ 149 const struct nfs_pageio_ops *pg_read_ops; 150 const struct nfs_pageio_ops *pg_write_ops; 151 152 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); 153 154 int (*sync)(struct inode *inode, bool datasync); 155 156 /* 157 * Return PNFS_ATTEMPTED to indicate the layout code has attempted 158 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS 159 */ 160 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); 161 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); 162 163 void (*free_deviceid_node) (struct nfs4_deviceid_node *); 164 struct nfs4_deviceid_node * (*alloc_deviceid_node) 165 (struct nfs_server *server, struct pnfs_device *pdev, 166 gfp_t gfp_flags); 167 168 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *); 169 170 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); 171 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); 172 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); 173 }; 174 175 struct pnfs_commit_ops { 176 void (*setup_ds_info)(struct pnfs_ds_commit_info *, 177 struct pnfs_layout_segment *); 178 void (*release_ds_info)(struct pnfs_ds_commit_info *, 179 struct inode *inode); 180 int (*commit_pagelist)(struct inode *inode, 181 struct list_head *mds_pages, 182 int how, 183 struct nfs_commit_info *cinfo); 184 void (*mark_request_commit) (struct nfs_page *req, 185 struct pnfs_layout_segment *lseg, 186 struct nfs_commit_info *cinfo, 187 u32 ds_commit_idx); 188 void (*clear_request_commit) (struct nfs_page *req, 189 struct nfs_commit_info *cinfo); 190 int (*scan_commit_lists) (struct nfs_commit_info *cinfo, 191 int max); 192 void (*recover_commit_reqs) (struct list_head *list, 193 struct nfs_commit_info *cinfo); 194 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, 195 struct page *page); 196 }; 197 198 struct pnfs_layout_hdr { 199 refcount_t plh_refcount; 200 atomic_t plh_outstanding; /* number of RPCs out */ 201 struct list_head plh_layouts; /* other client layouts */ 202 struct list_head plh_bulk_destroy; 203 struct list_head plh_segs; /* layout segments list */ 204 struct list_head plh_return_segs; /* invalid layout segments */ 205 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 206 unsigned long plh_retry_timestamp; 207 unsigned long plh_flags; 208 nfs4_stateid plh_stateid; 209 u32 plh_barrier; /* ignore lower seqids */ 210 u32 plh_return_seq; 211 enum pnfs_iomode plh_return_iomode; 212 loff_t plh_lwb; /* last write byte for layoutcommit */ 213 const struct cred *plh_lc_cred; /* layoutcommit cred */ 214 struct inode *plh_inode; 215 struct rcu_head plh_rcu; 216 }; 217 218 struct pnfs_device { 219 struct nfs4_deviceid dev_id; 220 unsigned int layout_type; 221 unsigned int mincount; 222 unsigned int maxcount; /* gdia_maxcount */ 223 struct page **pages; 224 unsigned int pgbase; 225 unsigned int pglen; /* reply buffer length */ 226 unsigned char nocache : 1;/* May not be cached */ 227 }; 228 229 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 230 231 struct pnfs_devicelist { 232 unsigned int eof; 233 unsigned int num_devs; 234 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 235 }; 236 237 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 238 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 239 240 /* nfs4proc.c */ 241 extern size_t max_response_pages(struct nfs_server *server); 242 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 243 struct pnfs_device *dev, 244 const struct cred *cred); 245 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout); 246 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); 247 248 /* pnfs.c */ 249 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 250 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 251 252 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); 253 void unset_pnfs_layoutdriver(struct nfs_server *); 254 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio); 255 void pnfs_generic_pg_check_range(struct nfs_pageio_descriptor *pgio, struct nfs_page *req); 256 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 257 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 258 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 259 struct nfs_page *req, u64 wb_size); 260 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 261 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 262 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 263 struct nfs_page *prev, struct nfs_page *req); 264 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 265 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 266 void pnfs_layoutget_free(struct nfs4_layoutget *lgp); 267 void pnfs_free_lseg_list(struct list_head *tmp_list); 268 void pnfs_destroy_layout(struct nfs_inode *); 269 void pnfs_destroy_all_layouts(struct nfs_client *); 270 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, 271 struct nfs_fsid *fsid, 272 bool is_recall); 273 int pnfs_destroy_layouts_byclid(struct nfs_client *clp, 274 bool is_recall); 275 bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 276 struct pnfs_layout_range *dst_range, 277 struct inode *inode); 278 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 279 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 280 const nfs4_stateid *new, 281 const struct cred *cred, 282 bool update_barrier); 283 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 284 struct list_head *tmp_list, 285 const struct pnfs_layout_range *recall_range, 286 u32 seq); 287 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 288 struct list_head *tmp_list, 289 const struct pnfs_layout_range *recall_range, 290 u32 seq); 291 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 292 struct list_head *lseg_list); 293 bool pnfs_roc(struct inode *ino, 294 struct nfs4_layoutreturn_args *args, 295 struct nfs4_layoutreturn_res *res, 296 const struct cred *cred); 297 int pnfs_roc_done(struct rpc_task *task, struct inode *inode, 298 struct nfs4_layoutreturn_args **argpp, 299 struct nfs4_layoutreturn_res **respp, 300 int *ret); 301 void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 302 struct nfs4_layoutreturn_res *res, 303 int ret); 304 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 305 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 306 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 307 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 308 int pnfs_generic_sync(struct inode *inode, bool datasync); 309 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 310 int _pnfs_return_layout(struct inode *); 311 int pnfs_commit_and_return_layout(struct inode *); 312 void pnfs_ld_write_done(struct nfs_pgio_header *); 313 void pnfs_ld_read_done(struct nfs_pgio_header *); 314 void pnfs_read_resend_pnfs(struct nfs_pgio_header *); 315 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 316 struct nfs_open_context *ctx, 317 loff_t pos, 318 u64 count, 319 enum pnfs_iomode iomode, 320 bool strict_iomode, 321 gfp_t gfp_flags); 322 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 323 const nfs4_stateid *arg_stateid, 324 const struct pnfs_layout_range *range, 325 const nfs4_stateid *stateid); 326 327 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 328 struct pnfs_layout_segment *lseg, 329 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 330 const struct pnfs_layout_range *old), 331 bool (*do_merge)(struct pnfs_layout_segment *lseg, 332 struct pnfs_layout_segment *old), 333 struct list_head *free_me); 334 335 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 336 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 337 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 338 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 339 void pnfs_error_mark_layout_for_return(struct inode *inode, 340 struct pnfs_layout_segment *lseg); 341 void pnfs_layout_return_unused_byclid(struct nfs_client *clp, 342 enum pnfs_iomode iomode); 343 344 /* nfs4_deviceid_flags */ 345 enum { 346 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 347 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 348 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 349 }; 350 351 /* pnfs_dev.c */ 352 struct nfs4_deviceid_node { 353 struct hlist_node node; 354 struct hlist_node tmpnode; 355 const struct pnfs_layoutdriver_type *ld; 356 const struct nfs_client *nfs_client; 357 unsigned long flags; 358 unsigned long timestamp_unavailable; 359 struct nfs4_deviceid deviceid; 360 struct rcu_head rcu; 361 atomic_t ref; 362 }; 363 364 struct nfs4_deviceid_node * 365 nfs4_find_get_deviceid(struct nfs_server *server, 366 const struct nfs4_deviceid *id, const struct cred *cred, 367 gfp_t gfp_mask); 368 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 369 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 370 const struct nfs4_deviceid *); 371 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 372 void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node); 373 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 374 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 375 void nfs4_deviceid_purge_client(const struct nfs_client *); 376 377 /* pnfs_nfs.c */ 378 struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags); 379 void pnfs_free_commit_array(struct pnfs_commit_array *p); 380 struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *, 381 struct pnfs_commit_array *, 382 struct pnfs_layout_segment *); 383 384 void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo, 385 struct pnfs_layout_segment *lseg); 386 void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo); 387 388 void pnfs_generic_clear_request_commit(struct nfs_page *req, 389 struct nfs_commit_info *cinfo); 390 void pnfs_generic_commit_release(void *calldata); 391 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 392 void pnfs_generic_rw_release(void *data); 393 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 394 struct nfs_commit_info *cinfo); 395 struct nfs_page *pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo, 396 struct page *page); 397 int pnfs_generic_commit_pagelist(struct inode *inode, 398 struct list_head *mds_pages, 399 int how, 400 struct nfs_commit_info *cinfo, 401 int (*initiate_commit)(struct nfs_commit_data *data, 402 int how)); 403 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 404 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 405 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 406 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 407 gfp_t gfp_flags); 408 void nfs4_pnfs_v3_ds_connect_unload(void); 409 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 410 struct nfs4_deviceid_node *devid, unsigned int timeo, 411 unsigned int retrans, u32 version, u32 minor_version); 412 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 413 struct xdr_stream *xdr, 414 gfp_t gfp_flags); 415 void pnfs_layout_mark_request_commit(struct nfs_page *req, 416 struct pnfs_layout_segment *lseg, 417 struct nfs_commit_info *cinfo, 418 u32 ds_commit_idx); 419 void pnfs_lgopen_prepare(struct nfs4_opendata *data, 420 struct nfs_open_context *ctx); 421 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, 422 struct nfs_open_context *ctx); 423 void nfs4_lgopen_release(struct nfs4_layoutget *lgp); 424 425 static inline bool nfs_have_layout(struct inode *inode) 426 { 427 return NFS_I(inode)->layout != NULL; 428 } 429 430 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 431 { 432 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 433 } 434 435 static inline struct nfs4_deviceid_node * 436 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 437 { 438 atomic_inc(&d->ref); 439 return d; 440 } 441 442 static inline struct pnfs_layout_segment * 443 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 444 { 445 if (lseg) { 446 refcount_inc(&lseg->pls_refcount); 447 smp_mb__after_atomic(); 448 } 449 return lseg; 450 } 451 452 static inline bool 453 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 454 { 455 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 456 } 457 458 /* Return true if a layout driver is being used for this mountpoint */ 459 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 460 { 461 return nfss->pnfs_curr_ld != NULL; 462 } 463 464 static inline int 465 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 466 struct nfs_commit_info *cinfo) 467 { 468 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 469 470 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0) 471 return PNFS_NOT_ATTEMPTED; 472 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo); 473 } 474 475 static inline struct pnfs_ds_commit_info * 476 pnfs_get_ds_info(struct inode *inode) 477 { 478 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 479 480 if (ld == NULL || ld->get_ds_info == NULL) 481 return NULL; 482 return ld->get_ds_info(inode); 483 } 484 485 static inline void 486 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 487 { 488 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode); 489 if (inode_cinfo != NULL) 490 fl_cinfo->ops = inode_cinfo->ops; 491 } 492 493 static inline void 494 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 495 { 496 INIT_LIST_HEAD(&fl_cinfo->commits); 497 fl_cinfo->ops = NULL; 498 } 499 500 static inline void 501 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 502 { 503 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL) 504 fl_cinfo->ops->release_ds_info(fl_cinfo, inode); 505 } 506 507 static inline void 508 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 509 { 510 set_bit(NFS_DEVICEID_INVALID, &node->flags); 511 } 512 513 static inline bool 514 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 515 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 516 { 517 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 518 519 if (!lseg || !fl_cinfo->ops->mark_request_commit) 520 return false; 521 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 522 return true; 523 } 524 525 static inline bool 526 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 527 { 528 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 529 530 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit) 531 return false; 532 fl_cinfo->ops->clear_request_commit(req, cinfo); 533 return true; 534 } 535 536 static inline int 537 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 538 int max) 539 { 540 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 541 542 if (!fl_cinfo || fl_cinfo->nwritten == 0) 543 return 0; 544 return fl_cinfo->ops->scan_commit_lists(cinfo, max); 545 } 546 547 static inline void 548 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 549 { 550 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 551 552 if (fl_cinfo && fl_cinfo->nwritten != 0) 553 fl_cinfo->ops->recover_commit_reqs(head, cinfo); 554 } 555 556 static inline struct nfs_page * 557 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 558 struct page *page) 559 { 560 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 561 562 if (!fl_cinfo->ops || !fl_cinfo->ops->search_commit_reqs) 563 return NULL; 564 return fl_cinfo->ops->search_commit_reqs(cinfo, page); 565 } 566 567 /* Should the pNFS client commit and return the layout upon a setattr */ 568 static inline bool 569 pnfs_ld_layoutret_on_setattr(struct inode *inode) 570 { 571 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 572 return false; 573 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 574 PNFS_LAYOUTRET_ON_SETATTR; 575 } 576 577 static inline bool 578 pnfs_ld_read_whole_page(struct inode *inode) 579 { 580 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 581 return false; 582 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 583 } 584 585 static inline int 586 pnfs_sync_inode(struct inode *inode, bool datasync) 587 { 588 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 589 return 0; 590 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 591 } 592 593 static inline bool 594 pnfs_layoutcommit_outstanding(struct inode *inode) 595 { 596 struct nfs_inode *nfsi = NFS_I(inode); 597 598 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 599 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 600 } 601 602 static inline int pnfs_return_layout(struct inode *ino) 603 { 604 struct nfs_inode *nfsi = NFS_I(ino); 605 struct nfs_server *nfss = NFS_SERVER(ino); 606 607 if (pnfs_enabled_sb(nfss) && nfsi->layout) { 608 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags); 609 return _pnfs_return_layout(ino); 610 } 611 612 return 0; 613 } 614 615 static inline bool 616 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 617 struct nfs_server *nfss) 618 { 619 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 620 nfss->pnfs_curr_ld->id == src->l_type); 621 } 622 623 static inline u64 624 pnfs_calc_offset_end(u64 offset, u64 len) 625 { 626 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 627 return NFS4_MAX_UINT64; 628 return offset + len - 1; 629 } 630 631 static inline u64 632 pnfs_calc_offset_length(u64 offset, u64 end) 633 { 634 if (end == NFS4_MAX_UINT64 || end <= offset) 635 return NFS4_MAX_UINT64; 636 return 1 + end - offset; 637 } 638 639 static inline void 640 pnfs_copy_range(struct pnfs_layout_range *dst, 641 const struct pnfs_layout_range *src) 642 { 643 memcpy(dst, src, sizeof(*dst)); 644 } 645 646 static inline u64 647 pnfs_end_offset(u64 start, u64 len) 648 { 649 if (NFS4_MAX_UINT64 - start <= len) 650 return NFS4_MAX_UINT64; 651 return start + len; 652 } 653 654 /* 655 * Are 2 ranges intersecting? 656 * start1 end1 657 * [----------------------------------) 658 * start2 end2 659 * [----------------) 660 */ 661 static inline bool 662 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 663 { 664 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 665 (end2 == NFS4_MAX_UINT64 || start1 < end2); 666 } 667 668 static inline bool 669 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 670 const struct pnfs_layout_range *l2) 671 { 672 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 673 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 674 675 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 676 } 677 678 static inline bool 679 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 680 { 681 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 682 u64 req_last = req_offset(req) + req->wb_bytes; 683 684 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 685 req_offset(req), req_last); 686 } 687 688 extern unsigned int layoutstats_timer; 689 690 #ifdef NFS_DEBUG 691 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 692 #else 693 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 694 { 695 } 696 697 #endif /* NFS_DEBUG */ 698 #else /* CONFIG_NFS_V4_1 */ 699 700 static inline bool nfs_have_layout(struct inode *inode) 701 { 702 return false; 703 } 704 705 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 706 { 707 } 708 709 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 710 { 711 } 712 713 static inline struct pnfs_layout_segment * 714 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 715 { 716 return NULL; 717 } 718 719 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 720 { 721 } 722 723 static inline int pnfs_return_layout(struct inode *ino) 724 { 725 return 0; 726 } 727 728 static inline int pnfs_commit_and_return_layout(struct inode *inode) 729 { 730 return 0; 731 } 732 733 static inline bool 734 pnfs_ld_layoutret_on_setattr(struct inode *inode) 735 { 736 return false; 737 } 738 739 static inline bool 740 pnfs_ld_read_whole_page(struct inode *inode) 741 { 742 return false; 743 } 744 745 static inline int 746 pnfs_sync_inode(struct inode *inode, bool datasync) 747 { 748 return 0; 749 } 750 751 static inline bool 752 pnfs_layoutcommit_outstanding(struct inode *inode) 753 { 754 return false; 755 } 756 757 758 static inline bool 759 pnfs_roc(struct inode *ino, 760 struct nfs4_layoutreturn_args *args, 761 struct nfs4_layoutreturn_res *res, 762 const struct cred *cred) 763 { 764 return false; 765 } 766 767 static inline int 768 pnfs_roc_done(struct rpc_task *task, struct inode *inode, 769 struct nfs4_layoutreturn_args **argpp, 770 struct nfs4_layoutreturn_res **respp, 771 int *ret) 772 { 773 return 0; 774 } 775 776 static inline void 777 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 778 struct nfs4_layoutreturn_res *res, 779 int ret) 780 { 781 } 782 783 static inline bool 784 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 785 { 786 return false; 787 } 788 789 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 790 const struct nfs_fh *mntfh, 791 struct nfs_fsinfo *fsinfo) 792 { 793 } 794 795 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 796 { 797 } 798 799 static inline int 800 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 801 struct nfs_commit_info *cinfo) 802 { 803 return PNFS_NOT_ATTEMPTED; 804 } 805 806 static inline struct pnfs_ds_commit_info * 807 pnfs_get_ds_info(struct inode *inode) 808 { 809 return NULL; 810 } 811 812 static inline void 813 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 814 { 815 } 816 817 static inline void 818 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 819 { 820 } 821 822 static inline void 823 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 824 { 825 } 826 827 static inline bool 828 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 829 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 830 { 831 return false; 832 } 833 834 static inline bool 835 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 836 { 837 return false; 838 } 839 840 static inline int 841 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 842 int max) 843 { 844 return 0; 845 } 846 847 static inline void 848 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 849 { 850 } 851 852 static inline struct nfs_page * 853 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 854 struct page *page) 855 { 856 return NULL; 857 } 858 859 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 860 { 861 return 0; 862 } 863 864 static inline bool 865 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 866 struct nfs_server *nfss) 867 { 868 return false; 869 } 870 871 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 872 { 873 return NULL; 874 } 875 876 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 877 { 878 } 879 880 static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 881 struct pnfs_layout_range *dst_range, 882 struct inode *inode) 883 { 884 return false; 885 } 886 887 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 888 struct nfs_open_context *ctx) 889 { 890 } 891 892 static inline void pnfs_parse_lgopen(struct inode *ino, 893 struct nfs4_layoutget *lgp, 894 struct nfs_open_context *ctx) 895 { 896 } 897 898 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 899 { 900 } 901 902 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 903 { 904 return false; 905 } 906 907 #endif /* CONFIG_NFS_V4_1 */ 908 909 #if IS_ENABLED(CONFIG_NFS_V4_2) 910 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 911 #else 912 static inline int 913 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 914 { 915 return 0; 916 } 917 #endif 918 919 #endif /* FS_NFS_PNFS_H */ 920