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 /* error codes for internal use */ 86 #define NFS4ERR_RESET_TO_MDS 12001 87 #define NFS4ERR_RESET_TO_PNFS 12002 88 89 #ifdef CONFIG_NFS_V4_1 90 91 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" 92 93 /* 94 * Default data server connection timeout and retrans vaules. 95 * Set by module parameters dataserver_timeo and dataserver_retrans. 96 */ 97 #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */ 98 #define NFS4_DEF_DS_RETRANS 5 99 #define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ) 100 101 enum { 102 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ 103 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ 104 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ 105 NFS_LAYOUT_RETURN, /* layoutreturn in progress */ 106 NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */ 107 NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */ 108 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ 109 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ 110 NFS_LAYOUT_INODE_FREEING, /* The inode is being freed */ 111 NFS_LAYOUT_HASHED, /* The layout visible */ 112 }; 113 114 enum layoutdriver_policy_flags { 115 /* Should the pNFS client commit and return the layout upon truncate to 116 * a smaller size */ 117 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, 118 PNFS_LAYOUTRET_ON_ERROR = 1 << 1, 119 PNFS_READ_WHOLE_PAGE = 1 << 2, 120 PNFS_LAYOUTGET_ON_OPEN = 1 << 3, 121 }; 122 123 struct nfs4_deviceid_node; 124 125 /* Per-layout driver specific registration structure */ 126 struct pnfs_layoutdriver_type { 127 struct list_head pnfs_tblid; 128 const u32 id; 129 const char *name; 130 struct module *owner; 131 unsigned flags; 132 unsigned max_deviceinfo_size; 133 unsigned max_layoutget_response; 134 135 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); 136 int (*clear_layoutdriver) (struct nfs_server *); 137 138 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); 139 void (*free_layout_hdr) (struct pnfs_layout_hdr *); 140 141 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); 142 void (*free_lseg) (struct pnfs_layout_segment *lseg); 143 void (*add_lseg) (struct pnfs_layout_hdr *layoutid, 144 struct pnfs_layout_segment *lseg, 145 struct list_head *free_me); 146 147 void (*return_range) (struct pnfs_layout_hdr *lo, 148 struct pnfs_layout_range *range); 149 150 /* test for nfs page cache coalescing */ 151 const struct nfs_pageio_ops *pg_read_ops; 152 const struct nfs_pageio_ops *pg_write_ops; 153 154 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); 155 156 int (*sync)(struct inode *inode, bool datasync); 157 158 /* 159 * Return PNFS_ATTEMPTED to indicate the layout code has attempted 160 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS 161 */ 162 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); 163 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); 164 165 void (*free_deviceid_node) (struct nfs4_deviceid_node *); 166 struct nfs4_deviceid_node * (*alloc_deviceid_node) 167 (struct nfs_server *server, struct pnfs_device *pdev, 168 gfp_t gfp_flags); 169 170 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *); 171 172 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); 173 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); 174 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); 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 page *page); 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 *); 241 242 /* nfs4proc.c */ 243 extern size_t max_response_pages(struct nfs_server *server); 244 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 245 struct pnfs_device *dev, 246 const struct cred *cred); 247 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout); 248 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); 249 250 /* pnfs.c */ 251 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 252 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 253 254 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); 255 void unset_pnfs_layoutdriver(struct nfs_server *); 256 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio); 257 void pnfs_generic_pg_check_range(struct nfs_pageio_descriptor *pgio, struct nfs_page *req); 258 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 259 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 260 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 261 struct nfs_page *req, u64 wb_size); 262 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 263 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 264 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 265 struct nfs_page *prev, struct nfs_page *req); 266 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 267 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 268 void pnfs_layoutget_free(struct nfs4_layoutget *lgp); 269 void pnfs_free_lseg_list(struct list_head *tmp_list); 270 void pnfs_destroy_layout(struct nfs_inode *); 271 void pnfs_destroy_layout_final(struct nfs_inode *); 272 void pnfs_destroy_all_layouts(struct nfs_client *); 273 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, 274 struct nfs_fsid *fsid, 275 bool is_recall); 276 int pnfs_destroy_layouts_byclid(struct nfs_client *clp, 277 bool is_recall); 278 bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 279 struct pnfs_layout_range *dst_range, 280 struct inode *inode); 281 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 282 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 283 const nfs4_stateid *new, 284 const struct cred *cred, 285 bool update_barrier); 286 int pnfs_mark_matching_lsegs_invalid(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_matching_lsegs_return(struct pnfs_layout_hdr *lo, 291 struct list_head *tmp_list, 292 const struct pnfs_layout_range *recall_range, 293 u32 seq); 294 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 295 struct list_head *lseg_list); 296 bool pnfs_roc(struct inode *ino, 297 struct nfs4_layoutreturn_args *args, 298 struct nfs4_layoutreturn_res *res, 299 const struct cred *cred); 300 int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp, 301 struct nfs4_layoutreturn_res **respp, int *ret); 302 void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 303 struct nfs4_layoutreturn_res *res, 304 int ret); 305 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 306 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 307 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 308 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 309 int pnfs_generic_sync(struct inode *inode, bool datasync); 310 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 311 int _pnfs_return_layout(struct inode *); 312 int pnfs_commit_and_return_layout(struct inode *); 313 void pnfs_ld_write_done(struct nfs_pgio_header *); 314 void pnfs_ld_read_done(struct nfs_pgio_header *); 315 void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx); 316 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 317 struct nfs_open_context *ctx, 318 loff_t pos, 319 u64 count, 320 enum pnfs_iomode iomode, 321 bool strict_iomode, 322 gfp_t gfp_flags); 323 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 324 const nfs4_stateid *arg_stateid, 325 const struct pnfs_layout_range *range, 326 const nfs4_stateid *stateid); 327 328 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 329 struct pnfs_layout_segment *lseg, 330 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 331 const struct pnfs_layout_range *old), 332 bool (*do_merge)(struct pnfs_layout_segment *lseg, 333 struct pnfs_layout_segment *old), 334 struct list_head *free_me); 335 336 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 337 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 338 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 339 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 340 void pnfs_error_mark_layout_for_return(struct inode *inode, 341 struct pnfs_layout_segment *lseg); 342 void pnfs_layout_return_unused_byclid(struct nfs_client *clp, 343 enum pnfs_iomode iomode); 344 345 /* nfs4_deviceid_flags */ 346 enum { 347 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 348 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 349 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 350 }; 351 352 /* pnfs_dev.c */ 353 struct nfs4_deviceid_node { 354 struct hlist_node node; 355 struct hlist_node tmpnode; 356 const struct pnfs_layoutdriver_type *ld; 357 const struct nfs_client *nfs_client; 358 unsigned long flags; 359 unsigned long timestamp_unavailable; 360 struct nfs4_deviceid deviceid; 361 struct rcu_head rcu; 362 atomic_t ref; 363 }; 364 365 struct nfs4_deviceid_node * 366 nfs4_find_get_deviceid(struct nfs_server *server, 367 const struct nfs4_deviceid *id, const struct cred *cred, 368 gfp_t gfp_mask); 369 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 370 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 371 const struct nfs4_deviceid *); 372 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 373 void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node); 374 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 375 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 376 void nfs4_deviceid_purge_client(const struct nfs_client *); 377 378 /* pnfs_nfs.c */ 379 struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags); 380 void pnfs_free_commit_array(struct pnfs_commit_array *p); 381 struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *, 382 struct pnfs_commit_array *, 383 struct pnfs_layout_segment *); 384 385 void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo, 386 struct pnfs_layout_segment *lseg); 387 void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo); 388 389 void pnfs_generic_clear_request_commit(struct nfs_page *req, 390 struct nfs_commit_info *cinfo); 391 void pnfs_generic_commit_release(void *calldata); 392 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 393 void pnfs_generic_rw_release(void *data); 394 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 395 struct nfs_commit_info *cinfo); 396 struct nfs_page *pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo, 397 struct page *page); 398 int pnfs_generic_commit_pagelist(struct inode *inode, 399 struct list_head *mds_pages, 400 int how, 401 struct nfs_commit_info *cinfo, 402 int (*initiate_commit)(struct nfs_commit_data *data, 403 int how)); 404 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 405 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 406 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 407 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 408 gfp_t gfp_flags); 409 void nfs4_pnfs_v3_ds_connect_unload(void); 410 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 411 struct nfs4_deviceid_node *devid, unsigned int timeo, 412 unsigned int retrans, u32 version, u32 minor_version); 413 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 414 struct xdr_stream *xdr, 415 gfp_t gfp_flags); 416 void pnfs_layout_mark_request_commit(struct nfs_page *req, 417 struct pnfs_layout_segment *lseg, 418 struct nfs_commit_info *cinfo, 419 u32 ds_commit_idx); 420 void pnfs_lgopen_prepare(struct nfs4_opendata *data, 421 struct nfs_open_context *ctx); 422 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, 423 struct nfs_open_context *ctx); 424 void nfs4_lgopen_release(struct nfs4_layoutget *lgp); 425 426 static inline bool nfs_have_layout(struct inode *inode) 427 { 428 return NFS_I(inode)->layout != NULL; 429 } 430 431 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 432 { 433 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 434 } 435 436 static inline struct nfs4_deviceid_node * 437 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 438 { 439 atomic_inc(&d->ref); 440 return d; 441 } 442 443 static inline struct pnfs_layout_segment * 444 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 445 { 446 if (lseg) { 447 refcount_inc(&lseg->pls_refcount); 448 smp_mb__after_atomic(); 449 } 450 return lseg; 451 } 452 453 static inline bool 454 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 455 { 456 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 457 } 458 459 /* Return true if a layout driver is being used for this mountpoint */ 460 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 461 { 462 return nfss->pnfs_curr_ld != NULL; 463 } 464 465 static inline int 466 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 467 struct nfs_commit_info *cinfo) 468 { 469 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 470 471 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0) 472 return PNFS_NOT_ATTEMPTED; 473 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo); 474 } 475 476 static inline struct pnfs_ds_commit_info * 477 pnfs_get_ds_info(struct inode *inode) 478 { 479 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 480 481 if (ld == NULL || ld->get_ds_info == NULL) 482 return NULL; 483 return ld->get_ds_info(inode); 484 } 485 486 static inline void 487 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 488 { 489 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode); 490 if (inode_cinfo != NULL) 491 fl_cinfo->ops = inode_cinfo->ops; 492 } 493 494 static inline void 495 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 496 { 497 INIT_LIST_HEAD(&fl_cinfo->commits); 498 fl_cinfo->ops = NULL; 499 } 500 501 static inline void 502 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 503 { 504 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL) 505 fl_cinfo->ops->release_ds_info(fl_cinfo, inode); 506 } 507 508 static inline void 509 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 510 { 511 set_bit(NFS_DEVICEID_INVALID, &node->flags); 512 } 513 514 static inline bool 515 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 516 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 517 { 518 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 519 520 if (!lseg || !fl_cinfo->ops->mark_request_commit) 521 return false; 522 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 523 return true; 524 } 525 526 static inline bool 527 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 528 { 529 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 530 531 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit) 532 return false; 533 fl_cinfo->ops->clear_request_commit(req, cinfo); 534 return true; 535 } 536 537 static inline int 538 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 539 int max) 540 { 541 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 542 543 if (!fl_cinfo || fl_cinfo->nwritten == 0) 544 return 0; 545 return fl_cinfo->ops->scan_commit_lists(cinfo, max); 546 } 547 548 static inline void 549 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 550 { 551 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 552 553 if (fl_cinfo && fl_cinfo->nwritten != 0) 554 fl_cinfo->ops->recover_commit_reqs(head, cinfo); 555 } 556 557 static inline struct nfs_page * 558 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 559 struct page *page) 560 { 561 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 562 563 if (!fl_cinfo->ops || !fl_cinfo->ops->search_commit_reqs) 564 return NULL; 565 return fl_cinfo->ops->search_commit_reqs(cinfo, page); 566 } 567 568 /* Should the pNFS client commit and return the layout upon a setattr */ 569 static inline bool 570 pnfs_ld_layoutret_on_setattr(struct inode *inode) 571 { 572 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 573 return false; 574 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 575 PNFS_LAYOUTRET_ON_SETATTR; 576 } 577 578 static inline bool 579 pnfs_ld_read_whole_page(struct inode *inode) 580 { 581 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 582 return false; 583 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 584 } 585 586 static inline int 587 pnfs_sync_inode(struct inode *inode, bool datasync) 588 { 589 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 590 return 0; 591 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 592 } 593 594 static inline bool 595 pnfs_layoutcommit_outstanding(struct inode *inode) 596 { 597 struct nfs_inode *nfsi = NFS_I(inode); 598 599 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 600 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 601 } 602 603 static inline int pnfs_return_layout(struct inode *ino) 604 { 605 struct nfs_inode *nfsi = NFS_I(ino); 606 struct nfs_server *nfss = NFS_SERVER(ino); 607 608 if (pnfs_enabled_sb(nfss) && nfsi->layout) { 609 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags); 610 return _pnfs_return_layout(ino); 611 } 612 613 return 0; 614 } 615 616 static inline bool 617 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 618 struct nfs_server *nfss) 619 { 620 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 621 nfss->pnfs_curr_ld->id == src->l_type); 622 } 623 624 static inline u64 625 pnfs_calc_offset_end(u64 offset, u64 len) 626 { 627 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 628 return NFS4_MAX_UINT64; 629 return offset + len - 1; 630 } 631 632 static inline u64 633 pnfs_calc_offset_length(u64 offset, u64 end) 634 { 635 if (end == NFS4_MAX_UINT64 || end <= offset) 636 return NFS4_MAX_UINT64; 637 return 1 + end - offset; 638 } 639 640 static inline void 641 pnfs_copy_range(struct pnfs_layout_range *dst, 642 const struct pnfs_layout_range *src) 643 { 644 memcpy(dst, src, sizeof(*dst)); 645 } 646 647 static inline u64 648 pnfs_end_offset(u64 start, u64 len) 649 { 650 if (NFS4_MAX_UINT64 - start <= len) 651 return NFS4_MAX_UINT64; 652 return start + len; 653 } 654 655 /* 656 * Are 2 ranges intersecting? 657 * start1 end1 658 * [----------------------------------) 659 * start2 end2 660 * [----------------) 661 */ 662 static inline bool 663 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 664 { 665 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 666 (end2 == NFS4_MAX_UINT64 || start1 < end2); 667 } 668 669 static inline bool 670 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 671 const struct pnfs_layout_range *l2) 672 { 673 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 674 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 675 676 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 677 } 678 679 static inline bool 680 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 681 { 682 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 683 u64 req_last = req_offset(req) + req->wb_bytes; 684 685 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 686 req_offset(req), req_last); 687 } 688 689 extern unsigned int layoutstats_timer; 690 691 #ifdef NFS_DEBUG 692 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 693 #else 694 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 695 { 696 } 697 698 #endif /* NFS_DEBUG */ 699 #else /* CONFIG_NFS_V4_1 */ 700 701 static inline bool nfs_have_layout(struct inode *inode) 702 { 703 return false; 704 } 705 706 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 707 { 708 } 709 710 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 711 { 712 } 713 714 static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi) 715 { 716 } 717 718 static inline struct pnfs_layout_segment * 719 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 720 { 721 return NULL; 722 } 723 724 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 725 { 726 } 727 728 static inline int pnfs_return_layout(struct inode *ino) 729 { 730 return 0; 731 } 732 733 static inline int pnfs_commit_and_return_layout(struct inode *inode) 734 { 735 return 0; 736 } 737 738 static inline bool 739 pnfs_ld_layoutret_on_setattr(struct inode *inode) 740 { 741 return false; 742 } 743 744 static inline bool 745 pnfs_ld_read_whole_page(struct inode *inode) 746 { 747 return false; 748 } 749 750 static inline int 751 pnfs_sync_inode(struct inode *inode, bool datasync) 752 { 753 return 0; 754 } 755 756 static inline bool 757 pnfs_layoutcommit_outstanding(struct inode *inode) 758 { 759 return false; 760 } 761 762 763 static inline bool 764 pnfs_roc(struct inode *ino, 765 struct nfs4_layoutreturn_args *args, 766 struct nfs4_layoutreturn_res *res, 767 const struct cred *cred) 768 { 769 return false; 770 } 771 772 static inline int 773 pnfs_roc_done(struct rpc_task *task, 774 struct nfs4_layoutreturn_args **argpp, 775 struct nfs4_layoutreturn_res **respp, 776 int *ret) 777 { 778 return 0; 779 } 780 781 static inline void 782 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 783 struct nfs4_layoutreturn_res *res, 784 int ret) 785 { 786 } 787 788 static inline bool 789 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 790 { 791 return false; 792 } 793 794 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 795 const struct nfs_fh *mntfh, 796 struct nfs_fsinfo *fsinfo) 797 { 798 } 799 800 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 801 { 802 } 803 804 static inline int 805 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 806 struct nfs_commit_info *cinfo) 807 { 808 return PNFS_NOT_ATTEMPTED; 809 } 810 811 static inline struct pnfs_ds_commit_info * 812 pnfs_get_ds_info(struct inode *inode) 813 { 814 return NULL; 815 } 816 817 static inline void 818 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 819 { 820 } 821 822 static inline void 823 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 824 { 825 } 826 827 static inline void 828 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 829 { 830 } 831 832 static inline bool 833 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 834 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 835 { 836 return false; 837 } 838 839 static inline bool 840 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 841 { 842 return false; 843 } 844 845 static inline int 846 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 847 int max) 848 { 849 return 0; 850 } 851 852 static inline void 853 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 854 { 855 } 856 857 static inline struct nfs_page * 858 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 859 struct page *page) 860 { 861 return NULL; 862 } 863 864 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 865 { 866 return 0; 867 } 868 869 static inline bool 870 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 871 struct nfs_server *nfss) 872 { 873 return false; 874 } 875 876 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 877 { 878 return NULL; 879 } 880 881 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 882 { 883 } 884 885 static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 886 struct pnfs_layout_range *dst_range, 887 struct inode *inode) 888 { 889 return false; 890 } 891 892 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 893 struct nfs_open_context *ctx) 894 { 895 } 896 897 static inline void pnfs_parse_lgopen(struct inode *ino, 898 struct nfs4_layoutget *lgp, 899 struct nfs_open_context *ctx) 900 { 901 } 902 903 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 904 { 905 } 906 907 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 908 { 909 return false; 910 } 911 912 #endif /* CONFIG_NFS_V4_1 */ 913 914 #if IS_ENABLED(CONFIG_NFS_V4_2) 915 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 916 #else 917 static inline int 918 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 919 { 920 return 0; 921 } 922 #endif 923 924 #endif /* FS_NFS_PNFS_H */ 925