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 const char *da_netid; 55 int da_transport; 56 }; 57 58 struct nfs4_pnfs_ds { 59 struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 60 char *ds_remotestr; /* comma sep list of addrs */ 61 struct list_head ds_addrs; 62 struct nfs_client *ds_clp; 63 refcount_t ds_count; 64 unsigned long ds_state; 65 #define NFS4DS_CONNECTING 0 /* ds is establishing connection */ 66 }; 67 68 struct pnfs_layout_segment { 69 struct list_head pls_list; 70 struct list_head pls_lc_list; 71 struct list_head pls_commits; 72 struct pnfs_layout_range pls_range; 73 refcount_t pls_refcount; 74 u32 pls_seq; 75 unsigned long pls_flags; 76 struct pnfs_layout_hdr *pls_layout; 77 }; 78 79 enum pnfs_try_status { 80 PNFS_ATTEMPTED = 0, 81 PNFS_NOT_ATTEMPTED = 1, 82 PNFS_TRY_AGAIN = 2, 83 }; 84 85 #ifdef CONFIG_NFS_V4_1 86 87 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" 88 89 /* 90 * Default data server connection timeout and retrans vaules. 91 * Set by module parameters dataserver_timeo and dataserver_retrans. 92 */ 93 #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */ 94 #define NFS4_DEF_DS_RETRANS 5 95 #define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ) 96 97 enum { 98 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ 99 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ 100 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ 101 NFS_LAYOUT_RETURN, /* layoutreturn in progress */ 102 NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */ 103 NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */ 104 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ 105 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ 106 NFS_LAYOUT_INODE_FREEING, /* The inode is being freed */ 107 NFS_LAYOUT_HASHED, /* The layout visible */ 108 }; 109 110 enum layoutdriver_policy_flags { 111 /* Should the pNFS client commit and return the layout upon truncate to 112 * a smaller size */ 113 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, 114 PNFS_LAYOUTRET_ON_ERROR = 1 << 1, 115 PNFS_READ_WHOLE_PAGE = 1 << 2, 116 PNFS_LAYOUTGET_ON_OPEN = 1 << 3, 117 }; 118 119 struct nfs4_deviceid_node; 120 121 /* Per-layout driver specific registration structure */ 122 struct pnfs_layoutdriver_type { 123 struct list_head pnfs_tblid; 124 const u32 id; 125 const char *name; 126 struct module *owner; 127 unsigned flags; 128 unsigned max_deviceinfo_size; 129 unsigned max_layoutget_response; 130 131 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); 132 int (*clear_layoutdriver) (struct nfs_server *); 133 134 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); 135 void (*free_layout_hdr) (struct pnfs_layout_hdr *); 136 137 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); 138 void (*free_lseg) (struct pnfs_layout_segment *lseg); 139 void (*add_lseg) (struct pnfs_layout_hdr *layoutid, 140 struct pnfs_layout_segment *lseg, 141 struct list_head *free_me); 142 143 void (*return_range) (struct pnfs_layout_hdr *lo, 144 struct pnfs_layout_range *range); 145 146 /* test for nfs page cache coalescing */ 147 const struct nfs_pageio_ops *pg_read_ops; 148 const struct nfs_pageio_ops *pg_write_ops; 149 150 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); 151 152 int (*sync)(struct inode *inode, bool datasync); 153 154 /* 155 * Return PNFS_ATTEMPTED to indicate the layout code has attempted 156 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS 157 */ 158 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); 159 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); 160 161 void (*free_deviceid_node) (struct nfs4_deviceid_node *); 162 struct nfs4_deviceid_node * (*alloc_deviceid_node) 163 (struct nfs_server *server, struct pnfs_device *pdev, 164 gfp_t gfp_flags); 165 166 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *); 167 168 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); 169 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); 170 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); 171 }; 172 173 struct pnfs_commit_ops { 174 void (*setup_ds_info)(struct pnfs_ds_commit_info *, 175 struct pnfs_layout_segment *); 176 void (*release_ds_info)(struct pnfs_ds_commit_info *, 177 struct inode *inode); 178 int (*commit_pagelist)(struct inode *inode, 179 struct list_head *mds_pages, 180 int how, 181 struct nfs_commit_info *cinfo); 182 void (*mark_request_commit) (struct nfs_page *req, 183 struct pnfs_layout_segment *lseg, 184 struct nfs_commit_info *cinfo, 185 u32 ds_commit_idx); 186 void (*clear_request_commit) (struct nfs_page *req, 187 struct nfs_commit_info *cinfo); 188 int (*scan_commit_lists) (struct nfs_commit_info *cinfo, 189 int max); 190 void (*recover_commit_reqs) (struct list_head *list, 191 struct nfs_commit_info *cinfo); 192 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, 193 struct page *page); 194 }; 195 196 struct pnfs_layout_hdr { 197 refcount_t plh_refcount; 198 atomic_t plh_outstanding; /* number of RPCs out */ 199 struct list_head plh_layouts; /* other client layouts */ 200 struct list_head plh_bulk_destroy; 201 struct list_head plh_segs; /* layout segments list */ 202 struct list_head plh_return_segs; /* invalid layout segments */ 203 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 204 unsigned long plh_retry_timestamp; 205 unsigned long plh_flags; 206 nfs4_stateid plh_stateid; 207 u32 plh_barrier; /* ignore lower seqids */ 208 u32 plh_return_seq; 209 enum pnfs_iomode plh_return_iomode; 210 loff_t plh_lwb; /* last write byte for layoutcommit */ 211 const struct cred *plh_lc_cred; /* layoutcommit cred */ 212 struct inode *plh_inode; 213 struct rcu_head plh_rcu; 214 }; 215 216 struct pnfs_device { 217 struct nfs4_deviceid dev_id; 218 unsigned int layout_type; 219 unsigned int mincount; 220 unsigned int maxcount; /* gdia_maxcount */ 221 struct page **pages; 222 unsigned int pgbase; 223 unsigned int pglen; /* reply buffer length */ 224 unsigned char nocache : 1;/* May not be cached */ 225 }; 226 227 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 228 229 struct pnfs_devicelist { 230 unsigned int eof; 231 unsigned int num_devs; 232 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 233 }; 234 235 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 236 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 237 238 /* nfs4proc.c */ 239 extern size_t max_response_pages(struct nfs_server *server); 240 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 241 struct pnfs_device *dev, 242 const struct cred *cred); 243 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout); 244 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); 245 246 /* pnfs.c */ 247 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 248 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 249 250 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); 251 void unset_pnfs_layoutdriver(struct nfs_server *); 252 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio); 253 void pnfs_generic_pg_check_range(struct nfs_pageio_descriptor *pgio, struct nfs_page *req); 254 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 255 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 256 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 257 struct nfs_page *req, u64 wb_size); 258 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 259 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 260 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 261 struct nfs_page *prev, struct nfs_page *req); 262 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 263 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 264 void pnfs_layoutget_free(struct nfs4_layoutget *lgp); 265 void pnfs_free_lseg_list(struct list_head *tmp_list); 266 void pnfs_destroy_layout(struct nfs_inode *); 267 void pnfs_destroy_layout_final(struct nfs_inode *); 268 void pnfs_destroy_all_layouts(struct nfs_client *); 269 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, 270 struct nfs_fsid *fsid, 271 bool is_recall); 272 int pnfs_destroy_layouts_byclid(struct nfs_client *clp, 273 bool is_recall); 274 bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 275 struct pnfs_layout_range *dst_range, 276 struct inode *inode); 277 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 278 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 279 const nfs4_stateid *new, 280 const struct cred *cred, 281 bool update_barrier); 282 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 283 struct list_head *tmp_list, 284 const struct pnfs_layout_range *recall_range, 285 u32 seq); 286 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 287 struct list_head *tmp_list, 288 const struct pnfs_layout_range *recall_range, 289 u32 seq); 290 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 291 struct list_head *lseg_list); 292 bool pnfs_roc(struct inode *ino, 293 struct nfs4_layoutreturn_args *args, 294 struct nfs4_layoutreturn_res *res, 295 const struct cred *cred); 296 int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp, 297 struct nfs4_layoutreturn_res **respp, int *ret); 298 void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 299 struct nfs4_layoutreturn_res *res, 300 int ret); 301 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 302 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 303 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 304 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 305 int pnfs_generic_sync(struct inode *inode, bool datasync); 306 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 307 int _pnfs_return_layout(struct inode *); 308 int pnfs_commit_and_return_layout(struct inode *); 309 void pnfs_ld_write_done(struct nfs_pgio_header *); 310 void pnfs_ld_read_done(struct nfs_pgio_header *); 311 void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx); 312 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 313 struct nfs_open_context *ctx, 314 loff_t pos, 315 u64 count, 316 enum pnfs_iomode iomode, 317 bool strict_iomode, 318 gfp_t gfp_flags); 319 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 320 const nfs4_stateid *arg_stateid, 321 const struct pnfs_layout_range *range, 322 const nfs4_stateid *stateid); 323 324 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 325 struct pnfs_layout_segment *lseg, 326 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 327 const struct pnfs_layout_range *old), 328 bool (*do_merge)(struct pnfs_layout_segment *lseg, 329 struct pnfs_layout_segment *old), 330 struct list_head *free_me); 331 332 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 333 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 334 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 335 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 336 void pnfs_error_mark_layout_for_return(struct inode *inode, 337 struct pnfs_layout_segment *lseg); 338 void pnfs_layout_return_unused_byclid(struct nfs_client *clp, 339 enum pnfs_iomode iomode); 340 341 /* nfs4_deviceid_flags */ 342 enum { 343 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 344 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 345 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 346 }; 347 348 /* pnfs_dev.c */ 349 struct nfs4_deviceid_node { 350 struct hlist_node node; 351 struct hlist_node tmpnode; 352 const struct pnfs_layoutdriver_type *ld; 353 const struct nfs_client *nfs_client; 354 unsigned long flags; 355 unsigned long timestamp_unavailable; 356 struct nfs4_deviceid deviceid; 357 struct rcu_head rcu; 358 atomic_t ref; 359 }; 360 361 struct nfs4_deviceid_node * 362 nfs4_find_get_deviceid(struct nfs_server *server, 363 const struct nfs4_deviceid *id, const struct cred *cred, 364 gfp_t gfp_mask); 365 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 366 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 367 const struct nfs4_deviceid *); 368 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 369 void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node); 370 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 371 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 372 void nfs4_deviceid_purge_client(const struct nfs_client *); 373 374 /* pnfs_nfs.c */ 375 struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags); 376 void pnfs_free_commit_array(struct pnfs_commit_array *p); 377 struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *, 378 struct pnfs_commit_array *, 379 struct pnfs_layout_segment *); 380 381 void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo, 382 struct pnfs_layout_segment *lseg); 383 void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo); 384 385 void pnfs_generic_clear_request_commit(struct nfs_page *req, 386 struct nfs_commit_info *cinfo); 387 void pnfs_generic_commit_release(void *calldata); 388 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 389 void pnfs_generic_rw_release(void *data); 390 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 391 struct nfs_commit_info *cinfo); 392 struct nfs_page *pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo, 393 struct page *page); 394 int pnfs_generic_commit_pagelist(struct inode *inode, 395 struct list_head *mds_pages, 396 int how, 397 struct nfs_commit_info *cinfo, 398 int (*initiate_commit)(struct nfs_commit_data *data, 399 int how)); 400 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 401 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 402 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 403 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 404 gfp_t gfp_flags); 405 void nfs4_pnfs_v3_ds_connect_unload(void); 406 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 407 struct nfs4_deviceid_node *devid, unsigned int timeo, 408 unsigned int retrans, u32 version, u32 minor_version); 409 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 410 struct xdr_stream *xdr, 411 gfp_t gfp_flags); 412 void pnfs_layout_mark_request_commit(struct nfs_page *req, 413 struct pnfs_layout_segment *lseg, 414 struct nfs_commit_info *cinfo, 415 u32 ds_commit_idx); 416 void pnfs_lgopen_prepare(struct nfs4_opendata *data, 417 struct nfs_open_context *ctx); 418 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, 419 struct nfs_open_context *ctx); 420 void nfs4_lgopen_release(struct nfs4_layoutget *lgp); 421 422 static inline bool nfs_have_layout(struct inode *inode) 423 { 424 return NFS_I(inode)->layout != NULL; 425 } 426 427 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 428 { 429 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 430 } 431 432 static inline struct nfs4_deviceid_node * 433 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 434 { 435 atomic_inc(&d->ref); 436 return d; 437 } 438 439 static inline struct pnfs_layout_segment * 440 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 441 { 442 if (lseg) { 443 refcount_inc(&lseg->pls_refcount); 444 smp_mb__after_atomic(); 445 } 446 return lseg; 447 } 448 449 static inline bool 450 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 451 { 452 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 453 } 454 455 /* Return true if a layout driver is being used for this mountpoint */ 456 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 457 { 458 return nfss->pnfs_curr_ld != NULL; 459 } 460 461 static inline int 462 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 463 struct nfs_commit_info *cinfo) 464 { 465 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 466 467 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0) 468 return PNFS_NOT_ATTEMPTED; 469 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo); 470 } 471 472 static inline struct pnfs_ds_commit_info * 473 pnfs_get_ds_info(struct inode *inode) 474 { 475 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 476 477 if (ld == NULL || ld->get_ds_info == NULL) 478 return NULL; 479 return ld->get_ds_info(inode); 480 } 481 482 static inline void 483 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 484 { 485 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode); 486 if (inode_cinfo != NULL) 487 fl_cinfo->ops = inode_cinfo->ops; 488 } 489 490 static inline void 491 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 492 { 493 INIT_LIST_HEAD(&fl_cinfo->commits); 494 fl_cinfo->ops = NULL; 495 } 496 497 static inline void 498 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 499 { 500 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL) 501 fl_cinfo->ops->release_ds_info(fl_cinfo, inode); 502 } 503 504 static inline void 505 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 506 { 507 set_bit(NFS_DEVICEID_INVALID, &node->flags); 508 } 509 510 static inline bool 511 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 512 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 513 { 514 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 515 516 if (!lseg || !fl_cinfo->ops || !fl_cinfo->ops->mark_request_commit) 517 return false; 518 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 519 return true; 520 } 521 522 static inline bool 523 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 524 { 525 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 526 527 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit) 528 return false; 529 fl_cinfo->ops->clear_request_commit(req, cinfo); 530 return true; 531 } 532 533 static inline int 534 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 535 int max) 536 { 537 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 538 539 if (!fl_cinfo || fl_cinfo->nwritten == 0) 540 return 0; 541 return fl_cinfo->ops->scan_commit_lists(cinfo, max); 542 } 543 544 static inline void 545 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 546 { 547 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 548 549 if (fl_cinfo && fl_cinfo->nwritten != 0) 550 fl_cinfo->ops->recover_commit_reqs(head, cinfo); 551 } 552 553 static inline struct nfs_page * 554 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 555 struct page *page) 556 { 557 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 558 559 if (!fl_cinfo->ops || !fl_cinfo->ops->search_commit_reqs) 560 return NULL; 561 return fl_cinfo->ops->search_commit_reqs(cinfo, page); 562 } 563 564 /* Should the pNFS client commit and return the layout upon a setattr */ 565 static inline bool 566 pnfs_ld_layoutret_on_setattr(struct inode *inode) 567 { 568 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 569 return false; 570 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 571 PNFS_LAYOUTRET_ON_SETATTR; 572 } 573 574 static inline bool 575 pnfs_ld_read_whole_page(struct inode *inode) 576 { 577 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 578 return false; 579 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 580 } 581 582 static inline int 583 pnfs_sync_inode(struct inode *inode, bool datasync) 584 { 585 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 586 return 0; 587 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 588 } 589 590 static inline bool 591 pnfs_layoutcommit_outstanding(struct inode *inode) 592 { 593 struct nfs_inode *nfsi = NFS_I(inode); 594 595 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 596 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 597 } 598 599 static inline int pnfs_return_layout(struct inode *ino) 600 { 601 struct nfs_inode *nfsi = NFS_I(ino); 602 struct nfs_server *nfss = NFS_SERVER(ino); 603 604 if (pnfs_enabled_sb(nfss) && nfsi->layout) { 605 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags); 606 return _pnfs_return_layout(ino); 607 } 608 609 return 0; 610 } 611 612 static inline bool 613 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 614 struct nfs_server *nfss) 615 { 616 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 617 nfss->pnfs_curr_ld->id == src->l_type); 618 } 619 620 static inline u64 621 pnfs_calc_offset_end(u64 offset, u64 len) 622 { 623 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 624 return NFS4_MAX_UINT64; 625 return offset + len - 1; 626 } 627 628 static inline u64 629 pnfs_calc_offset_length(u64 offset, u64 end) 630 { 631 if (end == NFS4_MAX_UINT64 || end <= offset) 632 return NFS4_MAX_UINT64; 633 return 1 + end - offset; 634 } 635 636 static inline void 637 pnfs_copy_range(struct pnfs_layout_range *dst, 638 const struct pnfs_layout_range *src) 639 { 640 memcpy(dst, src, sizeof(*dst)); 641 } 642 643 static inline u64 644 pnfs_end_offset(u64 start, u64 len) 645 { 646 if (NFS4_MAX_UINT64 - start <= len) 647 return NFS4_MAX_UINT64; 648 return start + len; 649 } 650 651 /* 652 * Are 2 ranges intersecting? 653 * start1 end1 654 * [----------------------------------) 655 * start2 end2 656 * [----------------) 657 */ 658 static inline bool 659 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 660 { 661 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 662 (end2 == NFS4_MAX_UINT64 || start1 < end2); 663 } 664 665 static inline bool 666 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 667 const struct pnfs_layout_range *l2) 668 { 669 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 670 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 671 672 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 673 } 674 675 static inline bool 676 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 677 { 678 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 679 u64 req_last = req_offset(req) + req->wb_bytes; 680 681 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 682 req_offset(req), req_last); 683 } 684 685 extern unsigned int layoutstats_timer; 686 687 #ifdef NFS_DEBUG 688 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 689 #else 690 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 691 { 692 } 693 694 #endif /* NFS_DEBUG */ 695 #else /* CONFIG_NFS_V4_1 */ 696 697 static inline bool nfs_have_layout(struct inode *inode) 698 { 699 return false; 700 } 701 702 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 703 { 704 } 705 706 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 707 { 708 } 709 710 static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi) 711 { 712 } 713 714 static inline struct pnfs_layout_segment * 715 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 716 { 717 return NULL; 718 } 719 720 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 721 { 722 } 723 724 static inline int pnfs_return_layout(struct inode *ino) 725 { 726 return 0; 727 } 728 729 static inline int pnfs_commit_and_return_layout(struct inode *inode) 730 { 731 return 0; 732 } 733 734 static inline bool 735 pnfs_ld_layoutret_on_setattr(struct inode *inode) 736 { 737 return false; 738 } 739 740 static inline bool 741 pnfs_ld_read_whole_page(struct inode *inode) 742 { 743 return false; 744 } 745 746 static inline int 747 pnfs_sync_inode(struct inode *inode, bool datasync) 748 { 749 return 0; 750 } 751 752 static inline bool 753 pnfs_layoutcommit_outstanding(struct inode *inode) 754 { 755 return false; 756 } 757 758 759 static inline bool 760 pnfs_roc(struct inode *ino, 761 struct nfs4_layoutreturn_args *args, 762 struct nfs4_layoutreturn_res *res, 763 const struct cred *cred) 764 { 765 return false; 766 } 767 768 static inline int 769 pnfs_roc_done(struct rpc_task *task, 770 struct nfs4_layoutreturn_args **argpp, 771 struct nfs4_layoutreturn_res **respp, 772 int *ret) 773 { 774 return 0; 775 } 776 777 static inline void 778 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 779 struct nfs4_layoutreturn_res *res, 780 int ret) 781 { 782 } 783 784 static inline bool 785 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 786 { 787 return false; 788 } 789 790 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 791 const struct nfs_fh *mntfh, 792 struct nfs_fsinfo *fsinfo) 793 { 794 } 795 796 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 797 { 798 } 799 800 static inline int 801 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 802 struct nfs_commit_info *cinfo) 803 { 804 return PNFS_NOT_ATTEMPTED; 805 } 806 807 static inline struct pnfs_ds_commit_info * 808 pnfs_get_ds_info(struct inode *inode) 809 { 810 return NULL; 811 } 812 813 static inline void 814 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 815 { 816 } 817 818 static inline void 819 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 820 { 821 } 822 823 static inline void 824 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 825 { 826 } 827 828 static inline bool 829 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 830 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 831 { 832 return false; 833 } 834 835 static inline bool 836 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 837 { 838 return false; 839 } 840 841 static inline int 842 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 843 int max) 844 { 845 return 0; 846 } 847 848 static inline void 849 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 850 { 851 } 852 853 static inline struct nfs_page * 854 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 855 struct page *page) 856 { 857 return NULL; 858 } 859 860 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 861 { 862 return 0; 863 } 864 865 static inline bool 866 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 867 struct nfs_server *nfss) 868 { 869 return false; 870 } 871 872 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 873 { 874 return NULL; 875 } 876 877 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 878 { 879 } 880 881 static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 882 struct pnfs_layout_range *dst_range, 883 struct inode *inode) 884 { 885 return false; 886 } 887 888 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 889 struct nfs_open_context *ctx) 890 { 891 } 892 893 static inline void pnfs_parse_lgopen(struct inode *ino, 894 struct nfs4_layoutget *lgp, 895 struct nfs_open_context *ctx) 896 { 897 } 898 899 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 900 { 901 } 902 903 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 904 { 905 return false; 906 } 907 908 #endif /* CONFIG_NFS_V4_1 */ 909 910 #if IS_ENABLED(CONFIG_NFS_V4_2) 911 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 912 #else 913 static inline int 914 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 915 { 916 return 0; 917 } 918 #endif 919 920 #endif /* FS_NFS_PNFS_H */ 921