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 void (*cancel_io)(struct pnfs_layout_segment *lseg); 174 }; 175 176 struct pnfs_commit_ops { 177 void (*setup_ds_info)(struct pnfs_ds_commit_info *, 178 struct pnfs_layout_segment *); 179 void (*release_ds_info)(struct pnfs_ds_commit_info *, 180 struct inode *inode); 181 int (*commit_pagelist)(struct inode *inode, 182 struct list_head *mds_pages, 183 int how, 184 struct nfs_commit_info *cinfo); 185 void (*mark_request_commit) (struct nfs_page *req, 186 struct pnfs_layout_segment *lseg, 187 struct nfs_commit_info *cinfo, 188 u32 ds_commit_idx); 189 void (*clear_request_commit) (struct nfs_page *req, 190 struct nfs_commit_info *cinfo); 191 int (*scan_commit_lists) (struct nfs_commit_info *cinfo, 192 int max); 193 void (*recover_commit_reqs) (struct list_head *list, 194 struct nfs_commit_info *cinfo); 195 struct nfs_page * (*search_commit_reqs)(struct nfs_commit_info *cinfo, 196 struct page *page); 197 }; 198 199 struct pnfs_layout_hdr { 200 refcount_t plh_refcount; 201 atomic_t plh_outstanding; /* number of RPCs out */ 202 struct list_head plh_layouts; /* other client layouts */ 203 struct list_head plh_bulk_destroy; 204 struct list_head plh_segs; /* layout segments list */ 205 struct list_head plh_return_segs; /* invalid layout segments */ 206 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 207 unsigned long plh_retry_timestamp; 208 unsigned long plh_flags; 209 nfs4_stateid plh_stateid; 210 u32 plh_barrier; /* ignore lower seqids */ 211 u32 plh_return_seq; 212 enum pnfs_iomode plh_return_iomode; 213 loff_t plh_lwb; /* last write byte for layoutcommit */ 214 const struct cred *plh_lc_cred; /* layoutcommit cred */ 215 struct inode *plh_inode; 216 struct rcu_head plh_rcu; 217 }; 218 219 struct pnfs_device { 220 struct nfs4_deviceid dev_id; 221 unsigned int layout_type; 222 unsigned int mincount; 223 unsigned int maxcount; /* gdia_maxcount */ 224 struct page **pages; 225 unsigned int pgbase; 226 unsigned int pglen; /* reply buffer length */ 227 unsigned char nocache : 1;/* May not be cached */ 228 }; 229 230 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 231 232 struct pnfs_devicelist { 233 unsigned int eof; 234 unsigned int num_devs; 235 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 236 }; 237 238 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 239 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 240 extern const struct pnfs_layoutdriver_type *pnfs_find_layoutdriver(u32 id); 241 extern void pnfs_put_layoutdriver(const struct pnfs_layoutdriver_type *ld); 242 243 /* nfs4proc.c */ 244 extern size_t max_response_pages(struct nfs_server *server); 245 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 246 struct pnfs_device *dev, 247 const struct cred *cred); 248 extern struct pnfs_layout_segment* nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout); 249 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync); 250 251 /* pnfs.c */ 252 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 253 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 254 255 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); 256 void unset_pnfs_layoutdriver(struct nfs_server *); 257 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio); 258 void pnfs_generic_pg_check_range(struct nfs_pageio_descriptor *pgio, struct nfs_page *req); 259 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 260 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 261 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 262 struct nfs_page *req, u64 wb_size); 263 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 264 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 265 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 266 struct nfs_page *prev, struct nfs_page *req); 267 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 268 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 269 void pnfs_layoutget_free(struct nfs4_layoutget *lgp); 270 void pnfs_free_lseg_list(struct list_head *tmp_list); 271 void pnfs_destroy_layout(struct nfs_inode *); 272 void pnfs_destroy_layout_final(struct nfs_inode *); 273 void pnfs_destroy_all_layouts(struct nfs_client *); 274 int pnfs_destroy_layouts_byfsid(struct nfs_client *clp, 275 struct nfs_fsid *fsid, 276 bool is_recall); 277 int pnfs_destroy_layouts_byclid(struct nfs_client *clp, 278 bool is_recall); 279 bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 280 struct pnfs_layout_range *dst_range, 281 struct inode *inode); 282 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 283 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 284 const nfs4_stateid *new, 285 const struct cred *cred, 286 bool update_barrier); 287 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 288 struct list_head *tmp_list, 289 const struct pnfs_layout_range *recall_range, 290 u32 seq); 291 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 292 struct list_head *tmp_list, 293 const struct pnfs_layout_range *recall_range, 294 u32 seq); 295 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 296 struct list_head *lseg_list); 297 bool pnfs_roc(struct inode *ino, 298 struct nfs4_layoutreturn_args *args, 299 struct nfs4_layoutreturn_res *res, 300 const struct cred *cred); 301 int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp, 302 struct nfs4_layoutreturn_res **respp, int *ret); 303 void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 304 struct nfs4_layoutreturn_res *res, 305 int ret); 306 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 307 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 308 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 309 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 310 int pnfs_generic_sync(struct inode *inode, bool datasync); 311 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 312 int _pnfs_return_layout(struct inode *); 313 int pnfs_commit_and_return_layout(struct inode *); 314 void pnfs_ld_write_done(struct nfs_pgio_header *); 315 void pnfs_ld_read_done(struct nfs_pgio_header *); 316 void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx); 317 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 318 struct nfs_open_context *ctx, 319 loff_t pos, 320 u64 count, 321 enum pnfs_iomode iomode, 322 bool strict_iomode, 323 gfp_t gfp_flags); 324 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 325 const nfs4_stateid *arg_stateid, 326 const struct pnfs_layout_range *range, 327 const nfs4_stateid *stateid); 328 329 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 330 struct pnfs_layout_segment *lseg, 331 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 332 const struct pnfs_layout_range *old), 333 bool (*do_merge)(struct pnfs_layout_segment *lseg, 334 struct pnfs_layout_segment *old), 335 struct list_head *free_me); 336 337 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 338 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 339 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 340 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 341 void pnfs_error_mark_layout_for_return(struct inode *inode, 342 struct pnfs_layout_segment *lseg); 343 void pnfs_layout_return_unused_byclid(struct nfs_client *clp, 344 enum pnfs_iomode iomode); 345 346 /* nfs4_deviceid_flags */ 347 enum { 348 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 349 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 350 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 351 }; 352 353 /* pnfs_dev.c */ 354 struct nfs4_deviceid_node { 355 struct hlist_node node; 356 struct hlist_node tmpnode; 357 const struct pnfs_layoutdriver_type *ld; 358 const struct nfs_client *nfs_client; 359 unsigned long flags; 360 unsigned long timestamp_unavailable; 361 struct nfs4_deviceid deviceid; 362 struct rcu_head rcu; 363 atomic_t ref; 364 }; 365 366 struct nfs4_deviceid_node * 367 nfs4_find_get_deviceid(struct nfs_server *server, 368 const struct nfs4_deviceid *id, const struct cred *cred, 369 gfp_t gfp_mask); 370 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 371 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 372 const struct nfs4_deviceid *); 373 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 374 void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node); 375 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 376 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 377 void nfs4_deviceid_purge_client(const struct nfs_client *); 378 379 /* pnfs_nfs.c */ 380 struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags); 381 void pnfs_free_commit_array(struct pnfs_commit_array *p); 382 struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *, 383 struct pnfs_commit_array *, 384 struct pnfs_layout_segment *); 385 386 void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo, 387 struct pnfs_layout_segment *lseg); 388 void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo); 389 390 void pnfs_generic_clear_request_commit(struct nfs_page *req, 391 struct nfs_commit_info *cinfo); 392 void pnfs_generic_commit_release(void *calldata); 393 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 394 void pnfs_generic_rw_release(void *data); 395 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 396 struct nfs_commit_info *cinfo); 397 struct nfs_page *pnfs_generic_search_commit_reqs(struct nfs_commit_info *cinfo, 398 struct page *page); 399 int pnfs_generic_commit_pagelist(struct inode *inode, 400 struct list_head *mds_pages, 401 int how, 402 struct nfs_commit_info *cinfo, 403 int (*initiate_commit)(struct nfs_commit_data *data, 404 int how)); 405 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 406 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 407 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 408 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs, 409 gfp_t gfp_flags); 410 void nfs4_pnfs_v3_ds_connect_unload(void); 411 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 412 struct nfs4_deviceid_node *devid, unsigned int timeo, 413 unsigned int retrans, u32 version, u32 minor_version); 414 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 415 struct xdr_stream *xdr, 416 gfp_t gfp_flags); 417 void pnfs_layout_mark_request_commit(struct nfs_page *req, 418 struct pnfs_layout_segment *lseg, 419 struct nfs_commit_info *cinfo, 420 u32 ds_commit_idx); 421 void pnfs_lgopen_prepare(struct nfs4_opendata *data, 422 struct nfs_open_context *ctx); 423 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, 424 struct nfs_open_context *ctx); 425 void nfs4_lgopen_release(struct nfs4_layoutget *lgp); 426 427 static inline bool nfs_have_layout(struct inode *inode) 428 { 429 return NFS_I(inode)->layout != NULL; 430 } 431 432 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 433 { 434 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 435 } 436 437 static inline struct nfs4_deviceid_node * 438 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 439 { 440 atomic_inc(&d->ref); 441 return d; 442 } 443 444 static inline struct pnfs_layout_segment * 445 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 446 { 447 if (lseg) { 448 refcount_inc(&lseg->pls_refcount); 449 smp_mb__after_atomic(); 450 } 451 return lseg; 452 } 453 454 static inline bool 455 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 456 { 457 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 458 } 459 460 /* Return true if a layout driver is being used for this mountpoint */ 461 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 462 { 463 return nfss->pnfs_curr_ld != NULL; 464 } 465 466 static inline int 467 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 468 struct nfs_commit_info *cinfo) 469 { 470 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 471 472 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0) 473 return PNFS_NOT_ATTEMPTED; 474 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo); 475 } 476 477 static inline struct pnfs_ds_commit_info * 478 pnfs_get_ds_info(struct inode *inode) 479 { 480 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 481 482 if (ld == NULL || ld->get_ds_info == NULL) 483 return NULL; 484 return ld->get_ds_info(inode); 485 } 486 487 static inline void 488 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 489 { 490 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode); 491 if (inode_cinfo != NULL) 492 fl_cinfo->ops = inode_cinfo->ops; 493 } 494 495 static inline void 496 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 497 { 498 INIT_LIST_HEAD(&fl_cinfo->commits); 499 fl_cinfo->ops = NULL; 500 } 501 502 static inline void 503 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 504 { 505 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL) 506 fl_cinfo->ops->release_ds_info(fl_cinfo, inode); 507 } 508 509 static inline void 510 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 511 { 512 set_bit(NFS_DEVICEID_INVALID, &node->flags); 513 } 514 515 static inline bool 516 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 517 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 518 { 519 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 520 521 if (!lseg || !fl_cinfo->ops || !fl_cinfo->ops->mark_request_commit) 522 return false; 523 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 524 return true; 525 } 526 527 static inline bool 528 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 529 { 530 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 531 532 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit) 533 return false; 534 fl_cinfo->ops->clear_request_commit(req, cinfo); 535 return true; 536 } 537 538 static inline int 539 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 540 int max) 541 { 542 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 543 544 if (!fl_cinfo || fl_cinfo->nwritten == 0) 545 return 0; 546 return fl_cinfo->ops->scan_commit_lists(cinfo, max); 547 } 548 549 static inline void 550 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 551 { 552 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 553 554 if (fl_cinfo && fl_cinfo->nwritten != 0) 555 fl_cinfo->ops->recover_commit_reqs(head, cinfo); 556 } 557 558 static inline struct nfs_page * 559 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 560 struct page *page) 561 { 562 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 563 564 if (!fl_cinfo->ops || !fl_cinfo->ops->search_commit_reqs) 565 return NULL; 566 return fl_cinfo->ops->search_commit_reqs(cinfo, page); 567 } 568 569 /* Should the pNFS client commit and return the layout upon a setattr */ 570 static inline bool 571 pnfs_ld_layoutret_on_setattr(struct inode *inode) 572 { 573 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 574 return false; 575 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 576 PNFS_LAYOUTRET_ON_SETATTR; 577 } 578 579 static inline bool 580 pnfs_ld_read_whole_page(struct inode *inode) 581 { 582 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 583 return false; 584 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 585 } 586 587 static inline int 588 pnfs_sync_inode(struct inode *inode, bool datasync) 589 { 590 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 591 return 0; 592 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 593 } 594 595 static inline bool 596 pnfs_layoutcommit_outstanding(struct inode *inode) 597 { 598 struct nfs_inode *nfsi = NFS_I(inode); 599 600 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 601 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 602 } 603 604 static inline int pnfs_return_layout(struct inode *ino) 605 { 606 struct nfs_inode *nfsi = NFS_I(ino); 607 struct nfs_server *nfss = NFS_SERVER(ino); 608 609 if (pnfs_enabled_sb(nfss) && nfsi->layout) { 610 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags); 611 return _pnfs_return_layout(ino); 612 } 613 614 return 0; 615 } 616 617 static inline bool 618 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 619 struct nfs_server *nfss) 620 { 621 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 622 nfss->pnfs_curr_ld->id == src->l_type); 623 } 624 625 static inline u64 626 pnfs_calc_offset_end(u64 offset, u64 len) 627 { 628 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 629 return NFS4_MAX_UINT64; 630 return offset + len - 1; 631 } 632 633 static inline u64 634 pnfs_calc_offset_length(u64 offset, u64 end) 635 { 636 if (end == NFS4_MAX_UINT64 || end <= offset) 637 return NFS4_MAX_UINT64; 638 return 1 + end - offset; 639 } 640 641 static inline void 642 pnfs_copy_range(struct pnfs_layout_range *dst, 643 const struct pnfs_layout_range *src) 644 { 645 memcpy(dst, src, sizeof(*dst)); 646 } 647 648 static inline u64 649 pnfs_end_offset(u64 start, u64 len) 650 { 651 if (NFS4_MAX_UINT64 - start <= len) 652 return NFS4_MAX_UINT64; 653 return start + len; 654 } 655 656 /* 657 * Are 2 ranges intersecting? 658 * start1 end1 659 * [----------------------------------) 660 * start2 end2 661 * [----------------) 662 */ 663 static inline bool 664 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 665 { 666 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 667 (end2 == NFS4_MAX_UINT64 || start1 < end2); 668 } 669 670 static inline bool 671 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 672 const struct pnfs_layout_range *l2) 673 { 674 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 675 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 676 677 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 678 } 679 680 static inline bool 681 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 682 { 683 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 684 u64 req_last = req_offset(req) + req->wb_bytes; 685 686 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 687 req_offset(req), req_last); 688 } 689 690 static inline void pnfs_lseg_cancel_io(struct nfs_server *server, 691 struct pnfs_layout_segment *lseg) 692 { 693 if (server->pnfs_curr_ld->cancel_io) 694 server->pnfs_curr_ld->cancel_io(lseg); 695 } 696 697 extern unsigned int layoutstats_timer; 698 699 #ifdef NFS_DEBUG 700 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 701 #else 702 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 703 { 704 } 705 706 #endif /* NFS_DEBUG */ 707 #else /* CONFIG_NFS_V4_1 */ 708 709 static inline bool nfs_have_layout(struct inode *inode) 710 { 711 return false; 712 } 713 714 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 715 { 716 } 717 718 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 719 { 720 } 721 722 static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi) 723 { 724 } 725 726 static inline struct pnfs_layout_segment * 727 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 728 { 729 return NULL; 730 } 731 732 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 733 { 734 } 735 736 static inline int pnfs_return_layout(struct inode *ino) 737 { 738 return 0; 739 } 740 741 static inline int pnfs_commit_and_return_layout(struct inode *inode) 742 { 743 return 0; 744 } 745 746 static inline bool 747 pnfs_ld_layoutret_on_setattr(struct inode *inode) 748 { 749 return false; 750 } 751 752 static inline bool 753 pnfs_ld_read_whole_page(struct inode *inode) 754 { 755 return false; 756 } 757 758 static inline int 759 pnfs_sync_inode(struct inode *inode, bool datasync) 760 { 761 return 0; 762 } 763 764 static inline bool 765 pnfs_layoutcommit_outstanding(struct inode *inode) 766 { 767 return false; 768 } 769 770 771 static inline bool 772 pnfs_roc(struct inode *ino, 773 struct nfs4_layoutreturn_args *args, 774 struct nfs4_layoutreturn_res *res, 775 const struct cred *cred) 776 { 777 return false; 778 } 779 780 static inline int 781 pnfs_roc_done(struct rpc_task *task, 782 struct nfs4_layoutreturn_args **argpp, 783 struct nfs4_layoutreturn_res **respp, 784 int *ret) 785 { 786 return 0; 787 } 788 789 static inline void 790 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 791 struct nfs4_layoutreturn_res *res, 792 int ret) 793 { 794 } 795 796 static inline bool 797 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 798 { 799 return false; 800 } 801 802 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 803 const struct nfs_fh *mntfh, 804 struct nfs_fsinfo *fsinfo) 805 { 806 } 807 808 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 809 { 810 } 811 812 static inline int 813 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 814 struct nfs_commit_info *cinfo) 815 { 816 return PNFS_NOT_ATTEMPTED; 817 } 818 819 static inline struct pnfs_ds_commit_info * 820 pnfs_get_ds_info(struct inode *inode) 821 { 822 return NULL; 823 } 824 825 static inline void 826 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 827 { 828 } 829 830 static inline void 831 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 832 { 833 } 834 835 static inline void 836 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 837 { 838 } 839 840 static inline bool 841 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 842 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 843 { 844 return false; 845 } 846 847 static inline bool 848 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 849 { 850 return false; 851 } 852 853 static inline int 854 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 855 int max) 856 { 857 return 0; 858 } 859 860 static inline void 861 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 862 { 863 } 864 865 static inline struct nfs_page * 866 pnfs_search_commit_reqs(struct inode *inode, struct nfs_commit_info *cinfo, 867 struct page *page) 868 { 869 return NULL; 870 } 871 872 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 873 { 874 return 0; 875 } 876 877 static inline bool 878 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 879 struct nfs_server *nfss) 880 { 881 return false; 882 } 883 884 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 885 { 886 return NULL; 887 } 888 889 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 890 { 891 } 892 893 static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 894 struct pnfs_layout_range *dst_range, 895 struct inode *inode) 896 { 897 return false; 898 } 899 900 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 901 struct nfs_open_context *ctx) 902 { 903 } 904 905 static inline void pnfs_parse_lgopen(struct inode *ino, 906 struct nfs4_layoutget *lgp, 907 struct nfs_open_context *ctx) 908 { 909 } 910 911 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 912 { 913 } 914 915 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 916 { 917 return false; 918 } 919 920 #endif /* CONFIG_NFS_V4_1 */ 921 922 #if IS_ENABLED(CONFIG_NFS_V4_2) 923 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 924 #else 925 static inline int 926 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 927 { 928 return 0; 929 } 930 #endif 931 932 #endif /* FS_NFS_PNFS_H */ 933