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_exception; 39 struct nfs4_opendata; 40 41 enum { 42 NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */ 43 NFS_LSEG_ROC, /* roc bit received from server */ 44 NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */ 45 NFS_LSEG_LAYOUTRETURN, /* layoutreturn bit set for layoutreturn */ 46 NFS_LSEG_UNAVAILABLE, /* unavailable bit set for temporary problem */ 47 }; 48 49 /* Individual ip address */ 50 struct nfs4_pnfs_ds_addr { 51 struct sockaddr_storage da_addr; 52 size_t da_addrlen; 53 struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 54 char *da_remotestr; /* human readable addr+port */ 55 const char *da_netid; 56 int da_transport; 57 }; 58 59 struct nfs4_pnfs_ds { 60 struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 61 char *ds_remotestr; /* comma sep list of addrs */ 62 struct list_head ds_addrs; 63 struct nfs_client *ds_clp; 64 refcount_t ds_count; 65 unsigned long ds_state; 66 #define NFS4DS_CONNECTING 0 /* ds is establishing connection */ 67 }; 68 69 struct pnfs_layout_segment { 70 struct list_head pls_list; 71 struct list_head pls_lc_list; 72 struct list_head pls_commits; 73 struct pnfs_layout_range pls_range; 74 refcount_t pls_refcount; 75 u32 pls_seq; 76 unsigned long pls_flags; 77 struct pnfs_layout_hdr *pls_layout; 78 }; 79 80 enum pnfs_try_status { 81 PNFS_ATTEMPTED = 0, 82 PNFS_NOT_ATTEMPTED = 1, 83 PNFS_TRY_AGAIN = 2, 84 }; 85 86 #ifdef CONFIG_NFS_V4_1 87 88 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" 89 90 /* 91 * Default data server connection timeout and retrans vaules. 92 * Set by module parameters dataserver_timeo and dataserver_retrans. 93 */ 94 #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */ 95 #define NFS4_DEF_DS_RETRANS 5 96 #define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ) 97 98 enum { 99 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ 100 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ 101 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ 102 NFS_LAYOUT_RETURN, /* layoutreturn in progress */ 103 NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */ 104 NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */ 105 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ 106 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ 107 NFS_LAYOUT_INODE_FREEING, /* The inode is being freed */ 108 NFS_LAYOUT_HASHED, /* The layout visible */ 109 NFS_LAYOUT_DRAIN, 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 void (*cancel_io)(struct pnfs_layout_segment *lseg); 175 }; 176 177 struct pnfs_commit_ops { 178 void (*setup_ds_info)(struct pnfs_ds_commit_info *, 179 struct pnfs_layout_segment *); 180 void (*release_ds_info)(struct pnfs_ds_commit_info *, 181 struct inode *inode); 182 int (*commit_pagelist)(struct inode *inode, 183 struct list_head *mds_pages, 184 int how, 185 struct nfs_commit_info *cinfo); 186 void (*mark_request_commit) (struct nfs_page *req, 187 struct pnfs_layout_segment *lseg, 188 struct nfs_commit_info *cinfo, 189 u32 ds_commit_idx); 190 void (*clear_request_commit) (struct nfs_page *req, 191 struct nfs_commit_info *cinfo); 192 int (*scan_commit_lists) (struct nfs_commit_info *cinfo, 193 int max); 194 void (*recover_commit_reqs) (struct list_head *list, 195 struct nfs_commit_info *cinfo); 196 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, 197 struct folio *folio); 198 }; 199 200 struct pnfs_layout_hdr { 201 refcount_t plh_refcount; 202 atomic_t plh_outstanding; /* number of RPCs out */ 203 struct list_head plh_layouts; /* other client layouts */ 204 struct list_head plh_bulk_destroy; 205 struct list_head plh_segs; /* layout segments list */ 206 struct list_head plh_return_segs; /* invalid layout segments */ 207 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 208 unsigned long plh_retry_timestamp; 209 unsigned long plh_flags; 210 nfs4_stateid plh_stateid; 211 u32 plh_barrier; /* ignore lower seqids */ 212 u32 plh_return_seq; 213 enum pnfs_iomode plh_return_iomode; 214 loff_t plh_lwb; /* last write byte for layoutcommit */ 215 const struct cred *plh_lc_cred; /* layoutcommit cred */ 216 struct inode *plh_inode; 217 struct rcu_head plh_rcu; 218 }; 219 220 struct pnfs_device { 221 struct nfs4_deviceid dev_id; 222 unsigned int layout_type; 223 unsigned int mincount; 224 unsigned int maxcount; /* gdia_maxcount */ 225 struct page **pages; 226 unsigned int pgbase; 227 unsigned int pglen; /* reply buffer length */ 228 unsigned char nocache : 1;/* May not be cached */ 229 }; 230 231 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 232 233 struct pnfs_devicelist { 234 unsigned int eof; 235 unsigned int num_devs; 236 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 237 }; 238 239 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 240 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 241 extern const struct pnfs_layoutdriver_type *pnfs_find_layoutdriver(u32 id); 242 extern void pnfs_put_layoutdriver(const struct pnfs_layoutdriver_type *ld); 243 244 /* nfs4proc.c */ 245 extern size_t max_response_pages(struct nfs_server *server); 246 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 247 struct pnfs_device *dev, 248 const struct cred *cred); 249 extern struct pnfs_layout_segment * 250 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, 251 struct nfs4_exception *exception); 252 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); 253 254 /* pnfs.c */ 255 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 256 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 257 258 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); 259 void unset_pnfs_layoutdriver(struct nfs_server *); 260 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio, struct nfs_page *req); 261 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 262 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 263 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 264 struct nfs_page *req, u64 wb_size); 265 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 266 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 267 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 268 struct nfs_page *prev, struct nfs_page *req); 269 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 270 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 271 void pnfs_layoutget_free(struct nfs4_layoutget *lgp); 272 void pnfs_free_lseg_list(struct list_head *tmp_list); 273 void pnfs_destroy_layout(struct nfs_inode *); 274 void pnfs_destroy_layout_final(struct nfs_inode *); 275 void pnfs_destroy_all_layouts(struct nfs_client *); 276 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, 277 struct nfs_fsid *fsid, 278 bool is_recall); 279 int pnfs_destroy_layouts_byclid(struct nfs_client *clp, 280 bool is_recall); 281 bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 282 struct pnfs_layout_range *dst_range, 283 struct inode *inode); 284 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 285 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 286 const nfs4_stateid *new, 287 const struct cred *cred, 288 bool update_barrier); 289 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 290 struct list_head *tmp_list, 291 const struct pnfs_layout_range *recall_range, 292 u32 seq); 293 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 294 struct list_head *tmp_list, 295 const struct pnfs_layout_range *recall_range, 296 u32 seq); 297 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 298 struct list_head *lseg_list); 299 bool pnfs_roc(struct inode *ino, 300 struct nfs4_layoutreturn_args *args, 301 struct nfs4_layoutreturn_res *res, 302 const struct cred *cred); 303 int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp, 304 struct nfs4_layoutreturn_res **respp, int *ret); 305 void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 306 struct nfs4_layoutreturn_res *res, 307 int ret); 308 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 309 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 310 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 311 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 312 int pnfs_generic_sync(struct inode *inode, bool datasync); 313 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 314 int _pnfs_return_layout(struct inode *); 315 int pnfs_commit_and_return_layout(struct inode *); 316 void pnfs_ld_write_done(struct nfs_pgio_header *); 317 void pnfs_ld_read_done(struct nfs_pgio_header *); 318 void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx); 319 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 320 struct nfs_open_context *ctx, 321 loff_t pos, 322 u64 count, 323 enum pnfs_iomode iomode, 324 bool strict_iomode, 325 gfp_t gfp_flags); 326 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 327 const nfs4_stateid *arg_stateid, 328 const struct pnfs_layout_range *range, 329 const nfs4_stateid *stateid); 330 331 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 332 struct pnfs_layout_segment *lseg, 333 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 334 const struct pnfs_layout_range *old), 335 bool (*do_merge)(struct pnfs_layout_segment *lseg, 336 struct pnfs_layout_segment *old), 337 struct list_head *free_me); 338 339 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 340 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 341 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 342 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 343 void pnfs_error_mark_layout_for_return(struct inode *inode, 344 struct pnfs_layout_segment *lseg); 345 void pnfs_layout_return_unused_byclid(struct nfs_client *clp, 346 enum pnfs_iomode iomode); 347 348 /* nfs4_deviceid_flags */ 349 enum { 350 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 351 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 352 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 353 }; 354 355 /* pnfs_dev.c */ 356 struct nfs4_deviceid_node { 357 struct hlist_node node; 358 struct hlist_node tmpnode; 359 const struct pnfs_layoutdriver_type *ld; 360 const struct nfs_client *nfs_client; 361 unsigned long flags; 362 unsigned long timestamp_unavailable; 363 struct nfs4_deviceid deviceid; 364 struct rcu_head rcu; 365 atomic_t ref; 366 }; 367 368 struct nfs4_deviceid_node * 369 nfs4_find_get_deviceid(struct nfs_server *server, 370 const struct nfs4_deviceid *id, const struct cred *cred, 371 gfp_t gfp_mask); 372 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 373 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 374 const struct nfs4_deviceid *); 375 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 376 void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node); 377 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 378 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 379 void nfs4_deviceid_purge_client(const struct nfs_client *); 380 381 /* pnfs_nfs.c */ 382 struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags); 383 void pnfs_free_commit_array(struct pnfs_commit_array *p); 384 struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *, 385 struct pnfs_commit_array *, 386 struct pnfs_layout_segment *); 387 388 void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo, 389 struct pnfs_layout_segment *lseg); 390 void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo); 391 392 void pnfs_generic_clear_request_commit(struct nfs_page *req, 393 struct nfs_commit_info *cinfo); 394 void pnfs_generic_commit_release(void *calldata); 395 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 396 void pnfs_generic_rw_release(void *data); 397 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 398 struct nfs_commit_info *cinfo); 399 struct nfs_page *pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo, 400 struct folio *folio); 401 int pnfs_generic_commit_pagelist(struct inode *inode, 402 struct list_head *mds_pages, 403 int how, 404 struct nfs_commit_info *cinfo, 405 int (*initiate_commit)(struct nfs_commit_data *data, 406 int how)); 407 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 408 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 409 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 410 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 411 gfp_t gfp_flags); 412 void nfs4_pnfs_v3_ds_connect_unload(void); 413 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 414 struct nfs4_deviceid_node *devid, unsigned int timeo, 415 unsigned int retrans, u32 version, u32 minor_version); 416 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 417 struct xdr_stream *xdr, 418 gfp_t gfp_flags); 419 void pnfs_layout_mark_request_commit(struct nfs_page *req, 420 struct pnfs_layout_segment *lseg, 421 struct nfs_commit_info *cinfo, 422 u32 ds_commit_idx); 423 void pnfs_lgopen_prepare(struct nfs4_opendata *data, 424 struct nfs_open_context *ctx); 425 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, 426 struct nfs_open_context *ctx); 427 void nfs4_lgopen_release(struct nfs4_layoutget *lgp); 428 429 static inline bool nfs_have_layout(struct inode *inode) 430 { 431 return NFS_I(inode)->layout != NULL; 432 } 433 434 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 435 { 436 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 437 } 438 439 static inline struct nfs4_deviceid_node * 440 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 441 { 442 atomic_inc(&d->ref); 443 return d; 444 } 445 446 static inline struct pnfs_layout_segment * 447 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 448 { 449 if (lseg) { 450 refcount_inc(&lseg->pls_refcount); 451 smp_mb__after_atomic(); 452 } 453 return lseg; 454 } 455 456 static inline bool 457 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 458 { 459 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 460 } 461 462 /* Return true if a layout driver is being used for this mountpoint */ 463 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 464 { 465 return nfss->pnfs_curr_ld != NULL; 466 } 467 468 static inline int 469 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 470 struct nfs_commit_info *cinfo) 471 { 472 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 473 474 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0) 475 return PNFS_NOT_ATTEMPTED; 476 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo); 477 } 478 479 static inline struct pnfs_ds_commit_info * 480 pnfs_get_ds_info(struct inode *inode) 481 { 482 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 483 484 if (ld == NULL || ld->get_ds_info == NULL) 485 return NULL; 486 return ld->get_ds_info(inode); 487 } 488 489 static inline void 490 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 491 { 492 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode); 493 if (inode_cinfo != NULL) 494 fl_cinfo->ops = inode_cinfo->ops; 495 } 496 497 static inline void 498 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 499 { 500 INIT_LIST_HEAD(&fl_cinfo->commits); 501 fl_cinfo->ops = NULL; 502 } 503 504 static inline void 505 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 506 { 507 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL) 508 fl_cinfo->ops->release_ds_info(fl_cinfo, inode); 509 } 510 511 static inline void 512 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 513 { 514 set_bit(NFS_DEVICEID_INVALID, &node->flags); 515 } 516 517 static inline bool 518 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 519 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 520 { 521 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 522 523 if (!lseg || !fl_cinfo->ops || !fl_cinfo->ops->mark_request_commit) 524 return false; 525 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 526 return true; 527 } 528 529 static inline bool 530 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 531 { 532 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 533 534 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit) 535 return false; 536 fl_cinfo->ops->clear_request_commit(req, cinfo); 537 return true; 538 } 539 540 static inline int 541 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 542 int max) 543 { 544 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 545 546 if (!fl_cinfo || fl_cinfo->nwritten == 0) 547 return 0; 548 return fl_cinfo->ops->scan_commit_lists(cinfo, max); 549 } 550 551 static inline void 552 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 553 { 554 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 555 556 if (fl_cinfo && fl_cinfo->nwritten != 0) 557 fl_cinfo->ops->recover_commit_reqs(head, cinfo); 558 } 559 560 static inline struct nfs_page * 561 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 562 struct folio *folio) 563 { 564 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 565 566 if (!fl_cinfo->ops || !fl_cinfo->ops->search_commit_reqs) 567 return NULL; 568 return fl_cinfo->ops->search_commit_reqs(cinfo, folio); 569 } 570 571 /* Should the pNFS client commit and return the layout upon a setattr */ 572 static inline bool 573 pnfs_ld_layoutret_on_setattr(struct inode *inode) 574 { 575 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 576 return false; 577 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 578 PNFS_LAYOUTRET_ON_SETATTR; 579 } 580 581 static inline bool 582 pnfs_ld_read_whole_page(struct inode *inode) 583 { 584 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 585 return false; 586 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 587 } 588 589 static inline int 590 pnfs_sync_inode(struct inode *inode, bool datasync) 591 { 592 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 593 return 0; 594 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 595 } 596 597 static inline bool 598 pnfs_layoutcommit_outstanding(struct inode *inode) 599 { 600 struct nfs_inode *nfsi = NFS_I(inode); 601 602 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 603 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 604 } 605 606 static inline int pnfs_return_layout(struct inode *ino) 607 { 608 struct nfs_inode *nfsi = NFS_I(ino); 609 struct nfs_server *nfss = NFS_SERVER(ino); 610 611 if (pnfs_enabled_sb(nfss) && nfsi->layout) { 612 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags); 613 return _pnfs_return_layout(ino); 614 } 615 616 return 0; 617 } 618 619 static inline bool 620 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 621 struct nfs_server *nfss) 622 { 623 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 624 nfss->pnfs_curr_ld->id == src->l_type); 625 } 626 627 static inline u64 628 pnfs_calc_offset_end(u64 offset, u64 len) 629 { 630 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 631 return NFS4_MAX_UINT64; 632 return offset + len - 1; 633 } 634 635 static inline u64 636 pnfs_calc_offset_length(u64 offset, u64 end) 637 { 638 if (end == NFS4_MAX_UINT64 || end <= offset) 639 return NFS4_MAX_UINT64; 640 return 1 + end - offset; 641 } 642 643 static inline void 644 pnfs_copy_range(struct pnfs_layout_range *dst, 645 const struct pnfs_layout_range *src) 646 { 647 memcpy(dst, src, sizeof(*dst)); 648 } 649 650 static inline u64 651 pnfs_end_offset(u64 start, u64 len) 652 { 653 if (NFS4_MAX_UINT64 - start <= len) 654 return NFS4_MAX_UINT64; 655 return start + len; 656 } 657 658 /* 659 * Are 2 ranges intersecting? 660 * start1 end1 661 * [----------------------------------) 662 * start2 end2 663 * [----------------) 664 */ 665 static inline bool 666 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 667 { 668 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 669 (end2 == NFS4_MAX_UINT64 || start1 < end2); 670 } 671 672 static inline bool 673 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 674 const struct pnfs_layout_range *l2) 675 { 676 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 677 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 678 679 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 680 } 681 682 static inline bool 683 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 684 { 685 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 686 u64 req_last = req_offset(req) + req->wb_bytes; 687 688 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 689 req_offset(req), req_last); 690 } 691 692 static inline void pnfs_lseg_cancel_io(struct nfs_server *server, 693 struct pnfs_layout_segment *lseg) 694 { 695 if (server->pnfs_curr_ld->cancel_io) 696 server->pnfs_curr_ld->cancel_io(lseg); 697 } 698 699 extern unsigned int layoutstats_timer; 700 701 #ifdef NFS_DEBUG 702 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 703 #else 704 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 705 { 706 } 707 708 #endif /* NFS_DEBUG */ 709 #else /* CONFIG_NFS_V4_1 */ 710 711 static inline bool nfs_have_layout(struct inode *inode) 712 { 713 return false; 714 } 715 716 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 717 { 718 } 719 720 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 721 { 722 } 723 724 static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi) 725 { 726 } 727 728 static inline struct pnfs_layout_segment * 729 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 730 { 731 return NULL; 732 } 733 734 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 735 { 736 } 737 738 static inline int pnfs_return_layout(struct inode *ino) 739 { 740 return 0; 741 } 742 743 static inline int pnfs_commit_and_return_layout(struct inode *inode) 744 { 745 return 0; 746 } 747 748 static inline bool 749 pnfs_ld_layoutret_on_setattr(struct inode *inode) 750 { 751 return false; 752 } 753 754 static inline bool 755 pnfs_ld_read_whole_page(struct inode *inode) 756 { 757 return false; 758 } 759 760 static inline int 761 pnfs_sync_inode(struct inode *inode, bool datasync) 762 { 763 return 0; 764 } 765 766 static inline bool 767 pnfs_layoutcommit_outstanding(struct inode *inode) 768 { 769 return false; 770 } 771 772 773 static inline bool 774 pnfs_roc(struct inode *ino, 775 struct nfs4_layoutreturn_args *args, 776 struct nfs4_layoutreturn_res *res, 777 const struct cred *cred) 778 { 779 return false; 780 } 781 782 static inline int 783 pnfs_roc_done(struct rpc_task *task, 784 struct nfs4_layoutreturn_args **argpp, 785 struct nfs4_layoutreturn_res **respp, 786 int *ret) 787 { 788 return 0; 789 } 790 791 static inline void 792 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 793 struct nfs4_layoutreturn_res *res, 794 int ret) 795 { 796 } 797 798 static inline bool 799 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 800 { 801 return false; 802 } 803 804 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 805 const struct nfs_fh *mntfh, 806 struct nfs_fsinfo *fsinfo) 807 { 808 } 809 810 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 811 { 812 } 813 814 static inline int 815 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 816 struct nfs_commit_info *cinfo) 817 { 818 return PNFS_NOT_ATTEMPTED; 819 } 820 821 static inline struct pnfs_ds_commit_info * 822 pnfs_get_ds_info(struct inode *inode) 823 { 824 return NULL; 825 } 826 827 static inline void 828 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 829 { 830 } 831 832 static inline void 833 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 834 { 835 } 836 837 static inline void 838 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 839 { 840 } 841 842 static inline bool 843 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 844 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 845 { 846 return false; 847 } 848 849 static inline bool 850 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 851 { 852 return false; 853 } 854 855 static inline int 856 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 857 int max) 858 { 859 return 0; 860 } 861 862 static inline void 863 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 864 { 865 } 866 867 static inline struct nfs_page * 868 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 869 struct folio *folio) 870 { 871 return NULL; 872 } 873 874 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 875 { 876 return 0; 877 } 878 879 static inline bool 880 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 881 struct nfs_server *nfss) 882 { 883 return false; 884 } 885 886 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 887 { 888 return NULL; 889 } 890 891 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 892 { 893 } 894 895 static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 896 struct pnfs_layout_range *dst_range, 897 struct inode *inode) 898 { 899 return false; 900 } 901 902 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 903 struct nfs_open_context *ctx) 904 { 905 } 906 907 static inline void pnfs_parse_lgopen(struct inode *ino, 908 struct nfs4_layoutget *lgp, 909 struct nfs_open_context *ctx) 910 { 911 } 912 913 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 914 { 915 } 916 917 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 918 { 919 return false; 920 } 921 922 #endif /* CONFIG_NFS_V4_1 */ 923 924 #if IS_ENABLED(CONFIG_NFS_V4_2) 925 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 926 #else 927 static inline int 928 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 929 { 930 return 0; 931 } 932 #endif 933 934 #endif /* FS_NFS_PNFS_H */ 935