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 NFS_LAYOUT_DRAIN, 109 }; 110 111 enum layoutdriver_policy_flags { 112 /* Should the pNFS client commit and return the layout upon truncate to 113 * a smaller size */ 114 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, 115 PNFS_LAYOUTRET_ON_ERROR = 1 << 1, 116 PNFS_READ_WHOLE_PAGE = 1 << 2, 117 PNFS_LAYOUTGET_ON_OPEN = 1 << 3, 118 }; 119 120 struct nfs4_deviceid_node; 121 122 /* Per-layout driver specific registration structure */ 123 struct pnfs_layoutdriver_type { 124 struct list_head pnfs_tblid; 125 const u32 id; 126 const char *name; 127 struct module *owner; 128 unsigned flags; 129 unsigned max_deviceinfo_size; 130 unsigned max_layoutget_response; 131 132 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); 133 int (*clear_layoutdriver) (struct nfs_server *); 134 135 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); 136 void (*free_layout_hdr) (struct pnfs_layout_hdr *); 137 138 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); 139 void (*free_lseg) (struct pnfs_layout_segment *lseg); 140 void (*add_lseg) (struct pnfs_layout_hdr *layoutid, 141 struct pnfs_layout_segment *lseg, 142 struct list_head *free_me); 143 144 void (*return_range) (struct pnfs_layout_hdr *lo, 145 struct pnfs_layout_range *range); 146 147 /* test for nfs page cache coalescing */ 148 const struct nfs_pageio_ops *pg_read_ops; 149 const struct nfs_pageio_ops *pg_write_ops; 150 151 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); 152 153 int (*sync)(struct inode *inode, bool datasync); 154 155 /* 156 * Return PNFS_ATTEMPTED to indicate the layout code has attempted 157 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS 158 */ 159 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); 160 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); 161 162 void (*free_deviceid_node) (struct nfs4_deviceid_node *); 163 struct nfs4_deviceid_node * (*alloc_deviceid_node) 164 (struct nfs_server *server, struct pnfs_device *pdev, 165 gfp_t gfp_flags); 166 167 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *); 168 169 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); 170 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); 171 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); 172 }; 173 174 struct pnfs_commit_ops { 175 void (*setup_ds_info)(struct pnfs_ds_commit_info *, 176 struct pnfs_layout_segment *); 177 void (*release_ds_info)(struct pnfs_ds_commit_info *, 178 struct inode *inode); 179 int (*commit_pagelist)(struct inode *inode, 180 struct list_head *mds_pages, 181 int how, 182 struct nfs_commit_info *cinfo); 183 void (*mark_request_commit) (struct nfs_page *req, 184 struct pnfs_layout_segment *lseg, 185 struct nfs_commit_info *cinfo, 186 u32 ds_commit_idx); 187 void (*clear_request_commit) (struct nfs_page *req, 188 struct nfs_commit_info *cinfo); 189 int (*scan_commit_lists) (struct nfs_commit_info *cinfo, 190 int max); 191 void (*recover_commit_reqs) (struct list_head *list, 192 struct nfs_commit_info *cinfo); 193 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, 194 struct page *page); 195 }; 196 197 struct pnfs_layout_hdr { 198 refcount_t plh_refcount; 199 atomic_t plh_outstanding; /* number of RPCs out */ 200 struct list_head plh_layouts; /* other client layouts */ 201 struct list_head plh_bulk_destroy; 202 struct list_head plh_segs; /* layout segments list */ 203 struct list_head plh_return_segs; /* invalid layout segments */ 204 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 205 unsigned long plh_retry_timestamp; 206 unsigned long plh_flags; 207 nfs4_stateid plh_stateid; 208 u32 plh_barrier; /* ignore lower seqids */ 209 u32 plh_return_seq; 210 enum pnfs_iomode plh_return_iomode; 211 loff_t plh_lwb; /* last write byte for layoutcommit */ 212 const struct cred *plh_lc_cred; /* layoutcommit cred */ 213 struct inode *plh_inode; 214 struct rcu_head plh_rcu; 215 }; 216 217 struct pnfs_device { 218 struct nfs4_deviceid dev_id; 219 unsigned int layout_type; 220 unsigned int mincount; 221 unsigned int maxcount; /* gdia_maxcount */ 222 struct page **pages; 223 unsigned int pgbase; 224 unsigned int pglen; /* reply buffer length */ 225 unsigned char nocache : 1;/* May not be cached */ 226 }; 227 228 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 229 230 struct pnfs_devicelist { 231 unsigned int eof; 232 unsigned int num_devs; 233 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 234 }; 235 236 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 237 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 238 extern const struct pnfs_layoutdriver_type *pnfs_find_layoutdriver(u32 id); 239 extern void pnfs_put_layoutdriver(const struct pnfs_layoutdriver_type *ld); 240 241 /* nfs4proc.c */ 242 extern size_t max_response_pages(struct nfs_server *server); 243 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 244 struct pnfs_device *dev, 245 const struct cred *cred); 246 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout); 247 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); 248 249 /* pnfs.c */ 250 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 251 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 252 253 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); 254 void unset_pnfs_layoutdriver(struct nfs_server *); 255 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio); 256 void pnfs_generic_pg_check_range(struct nfs_pageio_descriptor *pgio, struct nfs_page *req); 257 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 258 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 259 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 260 struct nfs_page *req, u64 wb_size); 261 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 262 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 263 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 264 struct nfs_page *prev, struct nfs_page *req); 265 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 266 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 267 void pnfs_layoutget_free(struct nfs4_layoutget *lgp); 268 void pnfs_free_lseg_list(struct list_head *tmp_list); 269 void pnfs_destroy_layout(struct nfs_inode *); 270 void pnfs_destroy_layout_final(struct nfs_inode *); 271 void pnfs_destroy_all_layouts(struct nfs_client *); 272 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, 273 struct nfs_fsid *fsid, 274 bool is_recall); 275 int pnfs_destroy_layouts_byclid(struct nfs_client *clp, 276 bool is_recall); 277 bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 278 struct pnfs_layout_range *dst_range, 279 struct inode *inode); 280 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 281 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 282 const nfs4_stateid *new, 283 const struct cred *cred, 284 bool update_barrier); 285 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 286 struct list_head *tmp_list, 287 const struct pnfs_layout_range *recall_range, 288 u32 seq); 289 int pnfs_mark_matching_lsegs_return(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_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 294 struct list_head *lseg_list); 295 bool pnfs_roc(struct inode *ino, 296 struct nfs4_layoutreturn_args *args, 297 struct nfs4_layoutreturn_res *res, 298 const struct cred *cred); 299 int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp, 300 struct nfs4_layoutreturn_res **respp, 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 *, unsigned int mirror_idx); 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 || !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 void pnfs_destroy_layout_final(struct nfs_inode *nfsi) 714 { 715 } 716 717 static inline struct pnfs_layout_segment * 718 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 719 { 720 return NULL; 721 } 722 723 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 724 { 725 } 726 727 static inline int pnfs_return_layout(struct inode *ino) 728 { 729 return 0; 730 } 731 732 static inline int pnfs_commit_and_return_layout(struct inode *inode) 733 { 734 return 0; 735 } 736 737 static inline bool 738 pnfs_ld_layoutret_on_setattr(struct inode *inode) 739 { 740 return false; 741 } 742 743 static inline bool 744 pnfs_ld_read_whole_page(struct inode *inode) 745 { 746 return false; 747 } 748 749 static inline int 750 pnfs_sync_inode(struct inode *inode, bool datasync) 751 { 752 return 0; 753 } 754 755 static inline bool 756 pnfs_layoutcommit_outstanding(struct inode *inode) 757 { 758 return false; 759 } 760 761 762 static inline bool 763 pnfs_roc(struct inode *ino, 764 struct nfs4_layoutreturn_args *args, 765 struct nfs4_layoutreturn_res *res, 766 const struct cred *cred) 767 { 768 return false; 769 } 770 771 static inline int 772 pnfs_roc_done(struct rpc_task *task, 773 struct nfs4_layoutreturn_args **argpp, 774 struct nfs4_layoutreturn_res **respp, 775 int *ret) 776 { 777 return 0; 778 } 779 780 static inline void 781 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 782 struct nfs4_layoutreturn_res *res, 783 int ret) 784 { 785 } 786 787 static inline bool 788 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 789 { 790 return false; 791 } 792 793 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 794 const struct nfs_fh *mntfh, 795 struct nfs_fsinfo *fsinfo) 796 { 797 } 798 799 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 800 { 801 } 802 803 static inline int 804 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 805 struct nfs_commit_info *cinfo) 806 { 807 return PNFS_NOT_ATTEMPTED; 808 } 809 810 static inline struct pnfs_ds_commit_info * 811 pnfs_get_ds_info(struct inode *inode) 812 { 813 return NULL; 814 } 815 816 static inline void 817 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 818 { 819 } 820 821 static inline void 822 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 823 { 824 } 825 826 static inline void 827 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 828 { 829 } 830 831 static inline bool 832 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 833 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 834 { 835 return false; 836 } 837 838 static inline bool 839 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 840 { 841 return false; 842 } 843 844 static inline int 845 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 846 int max) 847 { 848 return 0; 849 } 850 851 static inline void 852 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 853 { 854 } 855 856 static inline struct nfs_page * 857 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 858 struct page *page) 859 { 860 return NULL; 861 } 862 863 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 864 { 865 return 0; 866 } 867 868 static inline bool 869 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 870 struct nfs_server *nfss) 871 { 872 return false; 873 } 874 875 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 876 { 877 return NULL; 878 } 879 880 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 881 { 882 } 883 884 static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 885 struct pnfs_layout_range *dst_range, 886 struct inode *inode) 887 { 888 return false; 889 } 890 891 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 892 struct nfs_open_context *ctx) 893 { 894 } 895 896 static inline void pnfs_parse_lgopen(struct inode *ino, 897 struct nfs4_layoutget *lgp, 898 struct nfs_open_context *ctx) 899 { 900 } 901 902 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 903 { 904 } 905 906 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 907 { 908 return false; 909 } 910 911 #endif /* CONFIG_NFS_V4_1 */ 912 913 #if IS_ENABLED(CONFIG_NFS_V4_2) 914 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 915 #else 916 static inline int 917 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 918 { 919 return 0; 920 } 921 #endif 922 923 #endif /* FS_NFS_PNFS_H */ 924