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 extern const struct pnfs_layoutdriver_type *pnfs_find_layoutdriver(u32 id); 238 extern void pnfs_put_layoutdriver(const struct pnfs_layoutdriver_type *ld); 239 240 /* nfs4proc.c */ 241 extern size_t max_response_pages(struct nfs_server *server); 242 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 243 struct pnfs_device *dev, 244 const struct cred *cred); 245 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout); 246 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); 247 248 /* pnfs.c */ 249 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 250 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 251 252 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); 253 void unset_pnfs_layoutdriver(struct nfs_server *); 254 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio); 255 void pnfs_generic_pg_check_range(struct nfs_pageio_descriptor *pgio, struct nfs_page *req); 256 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 257 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 258 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 259 struct nfs_page *req, u64 wb_size); 260 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 261 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 262 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 263 struct nfs_page *prev, struct nfs_page *req); 264 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 265 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 266 void pnfs_layoutget_free(struct nfs4_layoutget *lgp); 267 void pnfs_free_lseg_list(struct list_head *tmp_list); 268 void pnfs_destroy_layout(struct nfs_inode *); 269 void pnfs_destroy_layout_final(struct nfs_inode *); 270 void pnfs_destroy_all_layouts(struct nfs_client *); 271 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, 272 struct nfs_fsid *fsid, 273 bool is_recall); 274 int pnfs_destroy_layouts_byclid(struct nfs_client *clp, 275 bool is_recall); 276 bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 277 struct pnfs_layout_range *dst_range, 278 struct inode *inode); 279 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 280 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 281 const nfs4_stateid *new, 282 const struct cred *cred, 283 bool update_barrier); 284 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 285 struct list_head *tmp_list, 286 const struct pnfs_layout_range *recall_range, 287 u32 seq); 288 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 289 struct list_head *tmp_list, 290 const struct pnfs_layout_range *recall_range, 291 u32 seq); 292 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 293 struct list_head *lseg_list); 294 bool pnfs_roc(struct inode *ino, 295 struct nfs4_layoutreturn_args *args, 296 struct nfs4_layoutreturn_res *res, 297 const struct cred *cred); 298 int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp, 299 struct nfs4_layoutreturn_res **respp, int *ret); 300 void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 301 struct nfs4_layoutreturn_res *res, 302 int ret); 303 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 304 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 305 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 306 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 307 int pnfs_generic_sync(struct inode *inode, bool datasync); 308 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 309 int _pnfs_return_layout(struct inode *); 310 int pnfs_commit_and_return_layout(struct inode *); 311 void pnfs_ld_write_done(struct nfs_pgio_header *); 312 void pnfs_ld_read_done(struct nfs_pgio_header *); 313 void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx); 314 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 315 struct nfs_open_context *ctx, 316 loff_t pos, 317 u64 count, 318 enum pnfs_iomode iomode, 319 bool strict_iomode, 320 gfp_t gfp_flags); 321 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 322 const nfs4_stateid *arg_stateid, 323 const struct pnfs_layout_range *range, 324 const nfs4_stateid *stateid); 325 326 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 327 struct pnfs_layout_segment *lseg, 328 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 329 const struct pnfs_layout_range *old), 330 bool (*do_merge)(struct pnfs_layout_segment *lseg, 331 struct pnfs_layout_segment *old), 332 struct list_head *free_me); 333 334 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 335 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 336 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 337 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 338 void pnfs_error_mark_layout_for_return(struct inode *inode, 339 struct pnfs_layout_segment *lseg); 340 void pnfs_layout_return_unused_byclid(struct nfs_client *clp, 341 enum pnfs_iomode iomode); 342 343 /* nfs4_deviceid_flags */ 344 enum { 345 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 346 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 347 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 348 }; 349 350 /* pnfs_dev.c */ 351 struct nfs4_deviceid_node { 352 struct hlist_node node; 353 struct hlist_node tmpnode; 354 const struct pnfs_layoutdriver_type *ld; 355 const struct nfs_client *nfs_client; 356 unsigned long flags; 357 unsigned long timestamp_unavailable; 358 struct nfs4_deviceid deviceid; 359 struct rcu_head rcu; 360 atomic_t ref; 361 }; 362 363 struct nfs4_deviceid_node * 364 nfs4_find_get_deviceid(struct nfs_server *server, 365 const struct nfs4_deviceid *id, const struct cred *cred, 366 gfp_t gfp_mask); 367 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 368 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 369 const struct nfs4_deviceid *); 370 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 371 void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node); 372 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 373 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 374 void nfs4_deviceid_purge_client(const struct nfs_client *); 375 376 /* pnfs_nfs.c */ 377 struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags); 378 void pnfs_free_commit_array(struct pnfs_commit_array *p); 379 struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *, 380 struct pnfs_commit_array *, 381 struct pnfs_layout_segment *); 382 383 void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo, 384 struct pnfs_layout_segment *lseg); 385 void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo); 386 387 void pnfs_generic_clear_request_commit(struct nfs_page *req, 388 struct nfs_commit_info *cinfo); 389 void pnfs_generic_commit_release(void *calldata); 390 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 391 void pnfs_generic_rw_release(void *data); 392 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 393 struct nfs_commit_info *cinfo); 394 struct nfs_page *pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo, 395 struct page *page); 396 int pnfs_generic_commit_pagelist(struct inode *inode, 397 struct list_head *mds_pages, 398 int how, 399 struct nfs_commit_info *cinfo, 400 int (*initiate_commit)(struct nfs_commit_data *data, 401 int how)); 402 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 403 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 404 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 405 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 406 gfp_t gfp_flags); 407 void nfs4_pnfs_v3_ds_connect_unload(void); 408 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 409 struct nfs4_deviceid_node *devid, unsigned int timeo, 410 unsigned int retrans, u32 version, u32 minor_version); 411 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 412 struct xdr_stream *xdr, 413 gfp_t gfp_flags); 414 void pnfs_layout_mark_request_commit(struct nfs_page *req, 415 struct pnfs_layout_segment *lseg, 416 struct nfs_commit_info *cinfo, 417 u32 ds_commit_idx); 418 void pnfs_lgopen_prepare(struct nfs4_opendata *data, 419 struct nfs_open_context *ctx); 420 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, 421 struct nfs_open_context *ctx); 422 void nfs4_lgopen_release(struct nfs4_layoutget *lgp); 423 424 static inline bool nfs_have_layout(struct inode *inode) 425 { 426 return NFS_I(inode)->layout != NULL; 427 } 428 429 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 430 { 431 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 432 } 433 434 static inline struct nfs4_deviceid_node * 435 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 436 { 437 atomic_inc(&d->ref); 438 return d; 439 } 440 441 static inline struct pnfs_layout_segment * 442 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 443 { 444 if (lseg) { 445 refcount_inc(&lseg->pls_refcount); 446 smp_mb__after_atomic(); 447 } 448 return lseg; 449 } 450 451 static inline bool 452 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 453 { 454 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 455 } 456 457 /* Return true if a layout driver is being used for this mountpoint */ 458 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 459 { 460 return nfss->pnfs_curr_ld != NULL; 461 } 462 463 static inline int 464 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 465 struct nfs_commit_info *cinfo) 466 { 467 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 468 469 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0) 470 return PNFS_NOT_ATTEMPTED; 471 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo); 472 } 473 474 static inline struct pnfs_ds_commit_info * 475 pnfs_get_ds_info(struct inode *inode) 476 { 477 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 478 479 if (ld == NULL || ld->get_ds_info == NULL) 480 return NULL; 481 return ld->get_ds_info(inode); 482 } 483 484 static inline void 485 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 486 { 487 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode); 488 if (inode_cinfo != NULL) 489 fl_cinfo->ops = inode_cinfo->ops; 490 } 491 492 static inline void 493 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 494 { 495 INIT_LIST_HEAD(&fl_cinfo->commits); 496 fl_cinfo->ops = NULL; 497 } 498 499 static inline void 500 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 501 { 502 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL) 503 fl_cinfo->ops->release_ds_info(fl_cinfo, inode); 504 } 505 506 static inline void 507 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 508 { 509 set_bit(NFS_DEVICEID_INVALID, &node->flags); 510 } 511 512 static inline bool 513 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 514 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 515 { 516 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 517 518 if (!lseg || !fl_cinfo->ops || !fl_cinfo->ops->mark_request_commit) 519 return false; 520 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 521 return true; 522 } 523 524 static inline bool 525 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 526 { 527 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 528 529 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit) 530 return false; 531 fl_cinfo->ops->clear_request_commit(req, cinfo); 532 return true; 533 } 534 535 static inline int 536 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 537 int max) 538 { 539 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 540 541 if (!fl_cinfo || fl_cinfo->nwritten == 0) 542 return 0; 543 return fl_cinfo->ops->scan_commit_lists(cinfo, max); 544 } 545 546 static inline void 547 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 548 { 549 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 550 551 if (fl_cinfo && fl_cinfo->nwritten != 0) 552 fl_cinfo->ops->recover_commit_reqs(head, cinfo); 553 } 554 555 static inline struct nfs_page * 556 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 557 struct page *page) 558 { 559 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 560 561 if (!fl_cinfo->ops || !fl_cinfo->ops->search_commit_reqs) 562 return NULL; 563 return fl_cinfo->ops->search_commit_reqs(cinfo, page); 564 } 565 566 /* Should the pNFS client commit and return the layout upon a setattr */ 567 static inline bool 568 pnfs_ld_layoutret_on_setattr(struct inode *inode) 569 { 570 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 571 return false; 572 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 573 PNFS_LAYOUTRET_ON_SETATTR; 574 } 575 576 static inline bool 577 pnfs_ld_read_whole_page(struct inode *inode) 578 { 579 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 580 return false; 581 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 582 } 583 584 static inline int 585 pnfs_sync_inode(struct inode *inode, bool datasync) 586 { 587 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 588 return 0; 589 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 590 } 591 592 static inline bool 593 pnfs_layoutcommit_outstanding(struct inode *inode) 594 { 595 struct nfs_inode *nfsi = NFS_I(inode); 596 597 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 598 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 599 } 600 601 static inline int pnfs_return_layout(struct inode *ino) 602 { 603 struct nfs_inode *nfsi = NFS_I(ino); 604 struct nfs_server *nfss = NFS_SERVER(ino); 605 606 if (pnfs_enabled_sb(nfss) && nfsi->layout) { 607 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags); 608 return _pnfs_return_layout(ino); 609 } 610 611 return 0; 612 } 613 614 static inline bool 615 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 616 struct nfs_server *nfss) 617 { 618 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 619 nfss->pnfs_curr_ld->id == src->l_type); 620 } 621 622 static inline u64 623 pnfs_calc_offset_end(u64 offset, u64 len) 624 { 625 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 626 return NFS4_MAX_UINT64; 627 return offset + len - 1; 628 } 629 630 static inline u64 631 pnfs_calc_offset_length(u64 offset, u64 end) 632 { 633 if (end == NFS4_MAX_UINT64 || end <= offset) 634 return NFS4_MAX_UINT64; 635 return 1 + end - offset; 636 } 637 638 static inline void 639 pnfs_copy_range(struct pnfs_layout_range *dst, 640 const struct pnfs_layout_range *src) 641 { 642 memcpy(dst, src, sizeof(*dst)); 643 } 644 645 static inline u64 646 pnfs_end_offset(u64 start, u64 len) 647 { 648 if (NFS4_MAX_UINT64 - start <= len) 649 return NFS4_MAX_UINT64; 650 return start + len; 651 } 652 653 /* 654 * Are 2 ranges intersecting? 655 * start1 end1 656 * [----------------------------------) 657 * start2 end2 658 * [----------------) 659 */ 660 static inline bool 661 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 662 { 663 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 664 (end2 == NFS4_MAX_UINT64 || start1 < end2); 665 } 666 667 static inline bool 668 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 669 const struct pnfs_layout_range *l2) 670 { 671 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 672 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 673 674 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 675 } 676 677 static inline bool 678 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 679 { 680 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 681 u64 req_last = req_offset(req) + req->wb_bytes; 682 683 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 684 req_offset(req), req_last); 685 } 686 687 extern unsigned int layoutstats_timer; 688 689 #ifdef NFS_DEBUG 690 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 691 #else 692 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 693 { 694 } 695 696 #endif /* NFS_DEBUG */ 697 #else /* CONFIG_NFS_V4_1 */ 698 699 static inline bool nfs_have_layout(struct inode *inode) 700 { 701 return false; 702 } 703 704 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 705 { 706 } 707 708 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 709 { 710 } 711 712 static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi) 713 { 714 } 715 716 static inline struct pnfs_layout_segment * 717 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 718 { 719 return NULL; 720 } 721 722 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 723 { 724 } 725 726 static inline int pnfs_return_layout(struct inode *ino) 727 { 728 return 0; 729 } 730 731 static inline int pnfs_commit_and_return_layout(struct inode *inode) 732 { 733 return 0; 734 } 735 736 static inline bool 737 pnfs_ld_layoutret_on_setattr(struct inode *inode) 738 { 739 return false; 740 } 741 742 static inline bool 743 pnfs_ld_read_whole_page(struct inode *inode) 744 { 745 return false; 746 } 747 748 static inline int 749 pnfs_sync_inode(struct inode *inode, bool datasync) 750 { 751 return 0; 752 } 753 754 static inline bool 755 pnfs_layoutcommit_outstanding(struct inode *inode) 756 { 757 return false; 758 } 759 760 761 static inline bool 762 pnfs_roc(struct inode *ino, 763 struct nfs4_layoutreturn_args *args, 764 struct nfs4_layoutreturn_res *res, 765 const struct cred *cred) 766 { 767 return false; 768 } 769 770 static inline int 771 pnfs_roc_done(struct rpc_task *task, 772 struct nfs4_layoutreturn_args **argpp, 773 struct nfs4_layoutreturn_res **respp, 774 int *ret) 775 { 776 return 0; 777 } 778 779 static inline void 780 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 781 struct nfs4_layoutreturn_res *res, 782 int ret) 783 { 784 } 785 786 static inline bool 787 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 788 { 789 return false; 790 } 791 792 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 793 const struct nfs_fh *mntfh, 794 struct nfs_fsinfo *fsinfo) 795 { 796 } 797 798 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 799 { 800 } 801 802 static inline int 803 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 804 struct nfs_commit_info *cinfo) 805 { 806 return PNFS_NOT_ATTEMPTED; 807 } 808 809 static inline struct pnfs_ds_commit_info * 810 pnfs_get_ds_info(struct inode *inode) 811 { 812 return NULL; 813 } 814 815 static inline void 816 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 817 { 818 } 819 820 static inline void 821 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 822 { 823 } 824 825 static inline void 826 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 827 { 828 } 829 830 static inline bool 831 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 832 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 833 { 834 return false; 835 } 836 837 static inline bool 838 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 839 { 840 return false; 841 } 842 843 static inline int 844 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 845 int max) 846 { 847 return 0; 848 } 849 850 static inline void 851 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 852 { 853 } 854 855 static inline struct nfs_page * 856 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 857 struct page *page) 858 { 859 return NULL; 860 } 861 862 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 863 { 864 return 0; 865 } 866 867 static inline bool 868 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 869 struct nfs_server *nfss) 870 { 871 return false; 872 } 873 874 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 875 { 876 return NULL; 877 } 878 879 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 880 { 881 } 882 883 static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 884 struct pnfs_layout_range *dst_range, 885 struct inode *inode) 886 { 887 return false; 888 } 889 890 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 891 struct nfs_open_context *ctx) 892 { 893 } 894 895 static inline void pnfs_parse_lgopen(struct inode *ino, 896 struct nfs4_layoutget *lgp, 897 struct nfs_open_context *ctx) 898 { 899 } 900 901 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 902 { 903 } 904 905 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 906 { 907 return false; 908 } 909 910 #endif /* CONFIG_NFS_V4_1 */ 911 912 #if IS_ENABLED(CONFIG_NFS_V4_2) 913 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 914 #else 915 static inline int 916 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 917 { 918 return 0; 919 } 920 #endif 921 922 #endif /* FS_NFS_PNFS_H */ 923