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_exception; 39 struct nfs4_opendata; 40 41 enum { 42 NFS_LSEG_VALID = 0, /* cleared when lseg is recalled/returned */ 43 NFS_LSEG_ROC, /* roc bit received from server */ 44 NFS_LSEG_LAYOUTCOMMIT, /* layoutcommit bit set for layoutcommit */ 45 NFS_LSEG_LAYOUTRETURN, /* layoutreturn bit set for layoutreturn */ 46 NFS_LSEG_UNAVAILABLE, /* unavailable bit set for temporary problem */ 47 }; 48 49 /* Individual ip address */ 50 struct nfs4_pnfs_ds_addr { 51 struct sockaddr_storage da_addr; 52 size_t da_addrlen; 53 struct list_head da_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 54 char *da_remotestr; /* human readable addr+port */ 55 const char *da_netid; 56 int da_transport; 57 }; 58 59 struct nfs4_pnfs_ds { 60 struct list_head ds_node; /* nfs4_pnfs_dev_hlist dev_dslist */ 61 char *ds_remotestr; /* comma sep list of addrs */ 62 struct list_head ds_addrs; 63 const struct net *ds_net; 64 struct nfs_client *ds_clp; 65 refcount_t ds_count; 66 unsigned long ds_state; 67 #define NFS4DS_CONNECTING 0 /* ds is establishing connection */ 68 }; 69 70 struct pnfs_layout_segment { 71 struct list_head pls_list; 72 struct list_head pls_lc_list; 73 struct list_head pls_commits; 74 struct pnfs_layout_range pls_range; 75 refcount_t pls_refcount; 76 u32 pls_seq; 77 unsigned long pls_flags; 78 struct pnfs_layout_hdr *pls_layout; 79 }; 80 81 enum pnfs_try_status { 82 PNFS_ATTEMPTED = 0, 83 PNFS_NOT_ATTEMPTED = 1, 84 PNFS_TRY_AGAIN = 2, 85 }; 86 87 #ifdef CONFIG_NFS_V4_1 88 89 #define LAYOUT_NFSV4_1_MODULE_PREFIX "nfs-layouttype4" 90 91 /* 92 * Default data server connection timeout and retrans vaules. 93 * Set by module parameters dataserver_timeo and dataserver_retrans. 94 */ 95 #define NFS4_DEF_DS_TIMEO 600 /* in tenths of a second */ 96 #define NFS4_DEF_DS_RETRANS 5 97 #define PNFS_DEVICE_RETRY_TIMEOUT (120*HZ) 98 99 enum { 100 NFS_LAYOUT_RO_FAILED = 0, /* get ro layout failed stop trying */ 101 NFS_LAYOUT_RW_FAILED, /* get rw layout failed stop trying */ 102 NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */ 103 NFS_LAYOUT_RETURN, /* layoutreturn in progress */ 104 NFS_LAYOUT_RETURN_LOCK, /* Serialise layoutreturn */ 105 NFS_LAYOUT_RETURN_REQUESTED, /* Return this layout ASAP */ 106 NFS_LAYOUT_INVALID_STID, /* layout stateid id is invalid */ 107 NFS_LAYOUT_FIRST_LAYOUTGET, /* Serialize first layoutget */ 108 NFS_LAYOUT_INODE_FREEING, /* The inode is being freed */ 109 NFS_LAYOUT_HASHED, /* The layout visible */ 110 NFS_LAYOUT_DRAIN, 111 }; 112 113 enum layoutdriver_policy_flags { 114 /* Should the pNFS client commit and return the layout upon truncate to 115 * a smaller size */ 116 PNFS_LAYOUTRET_ON_SETATTR = 1 << 0, 117 PNFS_LAYOUTRET_ON_ERROR = 1 << 1, 118 PNFS_READ_WHOLE_PAGE = 1 << 2, 119 PNFS_LAYOUTGET_ON_OPEN = 1 << 3, 120 }; 121 122 enum pnfs_layout_destroy_mode { 123 PNFS_LAYOUT_INVALIDATE = 0, 124 PNFS_LAYOUT_BULK_RETURN, 125 PNFS_LAYOUT_FILE_BULK_RETURN, 126 }; 127 128 struct nfs4_deviceid_node; 129 130 /* Per-layout driver specific registration structure */ 131 struct pnfs_layoutdriver_type { 132 struct list_head pnfs_tblid; 133 const u32 id; 134 const char *name; 135 struct module *owner; 136 unsigned flags; 137 unsigned max_layoutget_response; 138 139 int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); 140 int (*clear_layoutdriver) (struct nfs_server *); 141 142 struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); 143 void (*free_layout_hdr) (struct pnfs_layout_hdr *); 144 145 struct pnfs_layout_segment * (*alloc_lseg) (struct pnfs_layout_hdr *layoutid, struct nfs4_layoutget_res *lgr, gfp_t gfp_flags); 146 void (*free_lseg) (struct pnfs_layout_segment *lseg); 147 void (*add_lseg) (struct pnfs_layout_hdr *layoutid, 148 struct pnfs_layout_segment *lseg, 149 struct list_head *free_me); 150 151 void (*return_range) (struct pnfs_layout_hdr *lo, 152 struct pnfs_layout_range *range); 153 154 /* test for nfs page cache coalescing */ 155 const struct nfs_pageio_ops *pg_read_ops; 156 const struct nfs_pageio_ops *pg_write_ops; 157 158 struct pnfs_ds_commit_info *(*get_ds_info) (struct inode *inode); 159 160 int (*sync)(struct inode *inode, bool datasync); 161 162 /* 163 * Return PNFS_ATTEMPTED to indicate the layout code has attempted 164 * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS 165 */ 166 enum pnfs_try_status (*read_pagelist)(struct nfs_pgio_header *); 167 enum pnfs_try_status (*write_pagelist)(struct nfs_pgio_header *, int); 168 169 void (*free_deviceid_node) (struct nfs4_deviceid_node *); 170 struct nfs4_deviceid_node * (*alloc_deviceid_node) 171 (struct nfs_server *server, struct pnfs_device *pdev, 172 gfp_t gfp_flags); 173 174 int (*prepare_layoutreturn) (struct nfs4_layoutreturn_args *); 175 176 void (*cleanup_layoutcommit) (struct nfs4_layoutcommit_data *data); 177 int (*prepare_layoutcommit) (struct nfs4_layoutcommit_args *args); 178 int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args); 179 180 void (*cancel_io)(struct pnfs_layout_segment *lseg); 181 }; 182 183 struct pnfs_commit_ops { 184 void (*setup_ds_info)(struct pnfs_ds_commit_info *, 185 struct pnfs_layout_segment *); 186 void (*release_ds_info)(struct pnfs_ds_commit_info *, 187 struct inode *inode); 188 int (*commit_pagelist)(struct inode *inode, 189 struct list_head *mds_pages, 190 int how, 191 struct nfs_commit_info *cinfo); 192 void (*mark_request_commit) (struct nfs_page *req, 193 struct pnfs_layout_segment *lseg, 194 struct nfs_commit_info *cinfo, 195 u32 ds_commit_idx); 196 void (*clear_request_commit) (struct nfs_page *req, 197 struct nfs_commit_info *cinfo); 198 int (*scan_commit_lists) (struct nfs_commit_info *cinfo, 199 int max); 200 void (*recover_commit_reqs) (struct list_head *list, 201 struct nfs_commit_info *cinfo); 202 }; 203 204 struct pnfs_layout_hdr { 205 refcount_t plh_refcount; 206 atomic_t plh_outstanding; /* number of RPCs out */ 207 struct list_head plh_layouts; /* other client layouts */ 208 struct list_head plh_bulk_destroy; 209 struct list_head plh_segs; /* layout segments list */ 210 struct list_head plh_return_segs; /* invalid layout segments */ 211 unsigned long plh_block_lgets; /* block LAYOUTGET if >0 */ 212 unsigned long plh_retry_timestamp; 213 unsigned long plh_flags; 214 nfs4_stateid plh_stateid; 215 u32 plh_barrier; /* ignore lower seqids */ 216 u32 plh_return_seq; 217 enum pnfs_iomode plh_return_iomode; 218 loff_t plh_lwb; /* last write byte for layoutcommit */ 219 const struct cred *plh_lc_cred; /* layoutcommit cred */ 220 struct inode *plh_inode; 221 struct rcu_head plh_rcu; 222 }; 223 224 struct pnfs_device { 225 struct nfs4_deviceid dev_id; 226 unsigned int layout_type; 227 unsigned int mincount; 228 unsigned int maxcount; /* gdia_maxcount */ 229 struct page **pages; 230 unsigned int pgbase; 231 unsigned int pglen; /* reply buffer length */ 232 unsigned char nocache : 1;/* May not be cached */ 233 }; 234 235 #define NFS4_PNFS_GETDEVLIST_MAXNUM 16 236 237 struct pnfs_devicelist { 238 unsigned int eof; 239 unsigned int num_devs; 240 struct nfs4_deviceid dev_id[NFS4_PNFS_GETDEVLIST_MAXNUM]; 241 }; 242 243 extern int pnfs_register_layoutdriver(struct pnfs_layoutdriver_type *); 244 extern void pnfs_unregister_layoutdriver(struct pnfs_layoutdriver_type *); 245 extern const struct pnfs_layoutdriver_type *pnfs_find_layoutdriver(u32 id); 246 extern void pnfs_put_layoutdriver(const struct pnfs_layoutdriver_type *ld); 247 248 /* nfs4proc.c */ 249 #define PNFS_FL_LAYOUTRETURN_ASYNC (1U << 0) 250 #define PNFS_FL_LAYOUTRETURN_PRIVILEGED (1U << 1) 251 252 extern size_t max_response_pages(struct nfs_server *server); 253 extern int nfs4_proc_getdeviceinfo(struct nfs_server *server, 254 struct pnfs_device *dev, 255 const struct cred *cred); 256 extern struct pnfs_layout_segment * 257 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, 258 struct nfs4_exception *exception); 259 extern int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, 260 unsigned int flags); 261 262 /* pnfs.c */ 263 void pnfs_get_layout_hdr(struct pnfs_layout_hdr *lo); 264 void pnfs_put_lseg(struct pnfs_layout_segment *lseg); 265 266 void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, struct nfs_fsinfo *); 267 void unset_pnfs_layoutdriver(struct nfs_server *); 268 void pnfs_generic_pg_check_layout(struct nfs_pageio_descriptor *pgio, struct nfs_page *req); 269 void pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *, struct nfs_page *); 270 int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc); 271 void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, 272 struct nfs_page *req, u64 wb_size); 273 void pnfs_generic_pg_cleanup(struct nfs_pageio_descriptor *); 274 int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc); 275 size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, 276 struct nfs_page *prev, struct nfs_page *req); 277 void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg); 278 struct pnfs_layout_segment *pnfs_layout_process(struct nfs4_layoutget *lgp); 279 void pnfs_layoutget_free(struct nfs4_layoutget *lgp); 280 void pnfs_free_lseg_list(struct list_head *tmp_list); 281 void pnfs_destroy_layout(struct nfs_inode *); 282 void pnfs_destroy_layout_final(struct nfs_inode *); 283 void pnfs_destroy_all_layouts(struct nfs_client *); 284 int pnfs_layout_destroy_byfsid(struct nfs_client *clp, struct nfs_fsid *fsid, 285 enum pnfs_layout_destroy_mode mode); 286 int pnfs_layout_destroy_byclid(struct nfs_client *clp, 287 enum pnfs_layout_destroy_mode mode); 288 bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 289 struct pnfs_layout_range *dst_range, 290 struct inode *inode); 291 void pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo); 292 void pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, 293 const nfs4_stateid *new, 294 const struct cred *cred, 295 bool update_barrier); 296 int pnfs_mark_matching_lsegs_invalid(struct pnfs_layout_hdr *lo, 297 struct list_head *tmp_list, 298 const struct pnfs_layout_range *recall_range, 299 u32 seq); 300 int pnfs_mark_matching_lsegs_return(struct pnfs_layout_hdr *lo, 301 struct list_head *tmp_list, 302 const struct pnfs_layout_range *recall_range, 303 u32 seq); 304 int pnfs_mark_layout_stateid_invalid(struct pnfs_layout_hdr *lo, 305 struct list_head *lseg_list); 306 bool pnfs_roc(struct inode *ino, 307 struct nfs4_layoutreturn_args *args, 308 struct nfs4_layoutreturn_res *res, 309 const struct cred *cred); 310 int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp, 311 struct nfs4_layoutreturn_res **respp, int *ret); 312 void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 313 struct nfs4_layoutreturn_res *res, 314 int ret); 315 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 316 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 317 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 318 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 319 int pnfs_generic_sync(struct inode *inode, bool datasync); 320 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 321 int _pnfs_return_layout(struct inode *); 322 int pnfs_commit_and_return_layout(struct inode *); 323 void pnfs_ld_write_done(struct nfs_pgio_header *); 324 void pnfs_ld_read_done(struct nfs_pgio_header *); 325 void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx); 326 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 327 struct nfs_open_context *ctx, 328 loff_t pos, 329 u64 count, 330 enum pnfs_iomode iomode, 331 bool strict_iomode, 332 gfp_t gfp_flags); 333 void pnfs_layoutreturn_retry_later(struct pnfs_layout_hdr *lo, 334 const nfs4_stateid *arg_stateid, 335 const struct pnfs_layout_range *range); 336 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 337 const nfs4_stateid *arg_stateid, 338 const struct pnfs_layout_range *range, 339 const nfs4_stateid *stateid); 340 341 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 342 struct pnfs_layout_segment *lseg, 343 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 344 const struct pnfs_layout_range *old), 345 bool (*do_merge)(struct pnfs_layout_segment *lseg, 346 struct pnfs_layout_segment *old), 347 struct list_head *free_me); 348 349 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 350 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 351 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 352 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 353 void pnfs_error_mark_layout_for_return(struct inode *inode, 354 struct pnfs_layout_segment *lseg); 355 void pnfs_layout_return_unused_byclid(struct nfs_client *clp, 356 enum pnfs_iomode iomode); 357 int pnfs_layout_handle_reboot(struct nfs_client *clp); 358 359 /* nfs4_deviceid_flags */ 360 enum { 361 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 362 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 363 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 364 }; 365 366 /* pnfs_dev.c */ 367 struct nfs4_deviceid_node { 368 struct hlist_node node; 369 struct hlist_node tmpnode; 370 const struct pnfs_layoutdriver_type *ld; 371 const struct nfs_client *nfs_client; 372 unsigned long flags; 373 unsigned long timestamp_unavailable; 374 struct nfs4_deviceid deviceid; 375 struct rcu_head rcu; 376 atomic_t ref; 377 }; 378 379 struct nfs4_deviceid_node * 380 nfs4_find_get_deviceid(struct nfs_server *server, 381 const struct nfs4_deviceid *id, const struct cred *cred, 382 gfp_t gfp_mask); 383 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 384 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 385 const struct nfs4_deviceid *); 386 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 387 void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node); 388 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 389 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 390 void nfs4_deviceid_purge_client(const struct nfs_client *); 391 392 /* pnfs_nfs.c */ 393 struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags); 394 void pnfs_free_commit_array(struct pnfs_commit_array *p); 395 struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *, 396 struct pnfs_commit_array *, 397 struct pnfs_layout_segment *); 398 399 void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo, 400 struct pnfs_layout_segment *lseg); 401 void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo); 402 403 void pnfs_generic_clear_request_commit(struct nfs_page *req, 404 struct nfs_commit_info *cinfo); 405 void pnfs_generic_commit_release(void *calldata); 406 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 407 void pnfs_generic_rw_release(void *data); 408 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 409 struct nfs_commit_info *cinfo); 410 int pnfs_generic_commit_pagelist(struct inode *inode, 411 struct list_head *mds_pages, 412 int how, 413 struct nfs_commit_info *cinfo, 414 int (*initiate_commit)(struct nfs_commit_data *data, 415 int how)); 416 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 417 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 418 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 419 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(const struct net *net, 420 struct list_head *dsaddrs, 421 gfp_t gfp_flags); 422 void nfs4_pnfs_v3_ds_connect_unload(void); 423 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 424 struct nfs4_deviceid_node *devid, unsigned int timeo, 425 unsigned int retrans, u32 version, u32 minor_version); 426 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 427 struct xdr_stream *xdr, 428 gfp_t gfp_flags); 429 void pnfs_layout_mark_request_commit(struct nfs_page *req, 430 struct pnfs_layout_segment *lseg, 431 struct nfs_commit_info *cinfo, 432 u32 ds_commit_idx); 433 void pnfs_lgopen_prepare(struct nfs4_opendata *data, 434 struct nfs_open_context *ctx); 435 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, 436 struct nfs_open_context *ctx); 437 void nfs4_lgopen_release(struct nfs4_layoutget *lgp); 438 439 static inline bool nfs_have_layout(struct inode *inode) 440 { 441 return NFS_I(inode)->layout != NULL; 442 } 443 444 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 445 { 446 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 447 } 448 449 static inline struct nfs4_deviceid_node * 450 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 451 { 452 atomic_inc(&d->ref); 453 return d; 454 } 455 456 static inline struct pnfs_layout_segment * 457 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 458 { 459 if (lseg) { 460 refcount_inc(&lseg->pls_refcount); 461 smp_mb__after_atomic(); 462 } 463 return lseg; 464 } 465 466 static inline bool 467 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 468 { 469 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 470 } 471 472 /* Return true if a layout driver is being used for this mountpoint */ 473 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 474 { 475 return nfss->pnfs_curr_ld != NULL; 476 } 477 478 static inline int 479 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 480 struct nfs_commit_info *cinfo) 481 { 482 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 483 484 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0) 485 return PNFS_NOT_ATTEMPTED; 486 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo); 487 } 488 489 static inline struct pnfs_ds_commit_info * 490 pnfs_get_ds_info(struct inode *inode) 491 { 492 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 493 494 if (ld == NULL || ld->get_ds_info == NULL) 495 return NULL; 496 return ld->get_ds_info(inode); 497 } 498 499 static inline void 500 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 501 { 502 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode); 503 if (inode_cinfo != NULL) 504 fl_cinfo->ops = inode_cinfo->ops; 505 } 506 507 static inline void 508 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 509 { 510 INIT_LIST_HEAD(&fl_cinfo->commits); 511 fl_cinfo->ops = NULL; 512 } 513 514 static inline void 515 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 516 { 517 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL) 518 fl_cinfo->ops->release_ds_info(fl_cinfo, inode); 519 } 520 521 static inline void 522 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 523 { 524 set_bit(NFS_DEVICEID_INVALID, &node->flags); 525 } 526 527 static inline bool 528 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 529 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 530 { 531 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 532 533 if (!lseg || !fl_cinfo->ops || !fl_cinfo->ops->mark_request_commit) 534 return false; 535 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 536 return true; 537 } 538 539 static inline bool 540 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 541 { 542 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 543 544 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit) 545 return false; 546 fl_cinfo->ops->clear_request_commit(req, cinfo); 547 return true; 548 } 549 550 static inline int 551 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 552 int max) 553 { 554 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 555 556 if (!fl_cinfo || fl_cinfo->nwritten == 0) 557 return 0; 558 return fl_cinfo->ops->scan_commit_lists(cinfo, max); 559 } 560 561 static inline void 562 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 563 { 564 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 565 566 if (fl_cinfo && fl_cinfo->nwritten != 0) 567 fl_cinfo->ops->recover_commit_reqs(head, cinfo); 568 } 569 570 /* Should the pNFS client commit and return the layout upon a setattr */ 571 static inline bool 572 pnfs_ld_layoutret_on_setattr(struct inode *inode) 573 { 574 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 575 return false; 576 return NFS_SERVER(inode)->pnfs_curr_ld->flags & 577 PNFS_LAYOUTRET_ON_SETATTR; 578 } 579 580 static inline bool 581 pnfs_ld_read_whole_page(struct inode *inode) 582 { 583 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 584 return false; 585 return NFS_SERVER(inode)->pnfs_curr_ld->flags & PNFS_READ_WHOLE_PAGE; 586 } 587 588 static inline int 589 pnfs_sync_inode(struct inode *inode, bool datasync) 590 { 591 if (!pnfs_enabled_sb(NFS_SERVER(inode))) 592 return 0; 593 return NFS_SERVER(inode)->pnfs_curr_ld->sync(inode, datasync); 594 } 595 596 static inline bool 597 pnfs_layoutcommit_outstanding(struct inode *inode) 598 { 599 struct nfs_inode *nfsi = NFS_I(inode); 600 601 return test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags) != 0 || 602 test_bit(NFS_INO_LAYOUTCOMMITTING, &nfsi->flags) != 0; 603 } 604 605 static inline int pnfs_return_layout(struct inode *ino) 606 { 607 struct nfs_inode *nfsi = NFS_I(ino); 608 struct nfs_server *nfss = NFS_SERVER(ino); 609 610 if (pnfs_enabled_sb(nfss) && nfsi->layout) { 611 set_bit(NFS_LAYOUT_RETURN_REQUESTED, &nfsi->layout->plh_flags); 612 return _pnfs_return_layout(ino); 613 } 614 615 return 0; 616 } 617 618 static inline bool 619 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 620 struct nfs_server *nfss) 621 { 622 return (dst && src && src->bm != 0 && nfss->pnfs_curr_ld && 623 nfss->pnfs_curr_ld->id == src->l_type); 624 } 625 626 static inline u64 627 pnfs_calc_offset_end(u64 offset, u64 len) 628 { 629 if (len == NFS4_MAX_UINT64 || len >= NFS4_MAX_UINT64 - offset) 630 return NFS4_MAX_UINT64; 631 return offset + len - 1; 632 } 633 634 static inline u64 635 pnfs_calc_offset_length(u64 offset, u64 end) 636 { 637 if (end == NFS4_MAX_UINT64 || end <= offset) 638 return NFS4_MAX_UINT64; 639 return 1 + end - offset; 640 } 641 642 static inline void 643 pnfs_copy_range(struct pnfs_layout_range *dst, 644 const struct pnfs_layout_range *src) 645 { 646 memcpy(dst, src, sizeof(*dst)); 647 } 648 649 static inline u64 650 pnfs_end_offset(u64 start, u64 len) 651 { 652 if (NFS4_MAX_UINT64 - start <= len) 653 return NFS4_MAX_UINT64; 654 return start + len; 655 } 656 657 /* 658 * Are 2 ranges intersecting? 659 * start1 end1 660 * [----------------------------------) 661 * start2 end2 662 * [----------------) 663 */ 664 static inline bool 665 pnfs_is_range_intersecting(u64 start1, u64 end1, u64 start2, u64 end2) 666 { 667 return (end1 == NFS4_MAX_UINT64 || start2 < end1) && 668 (end2 == NFS4_MAX_UINT64 || start1 < end2); 669 } 670 671 static inline bool 672 pnfs_lseg_range_intersecting(const struct pnfs_layout_range *l1, 673 const struct pnfs_layout_range *l2) 674 { 675 u64 end1 = pnfs_end_offset(l1->offset, l1->length); 676 u64 end2 = pnfs_end_offset(l2->offset, l2->length); 677 678 return pnfs_is_range_intersecting(l1->offset, end1, l2->offset, end2); 679 } 680 681 static inline bool 682 pnfs_lseg_request_intersecting(struct pnfs_layout_segment *lseg, struct nfs_page *req) 683 { 684 u64 seg_last = pnfs_end_offset(lseg->pls_range.offset, lseg->pls_range.length); 685 u64 req_last = req_offset(req) + req->wb_bytes; 686 687 return pnfs_is_range_intersecting(lseg->pls_range.offset, seg_last, 688 req_offset(req), req_last); 689 } 690 691 static inline void pnfs_lseg_cancel_io(struct nfs_server *server, 692 struct pnfs_layout_segment *lseg) 693 { 694 if (server->pnfs_curr_ld->cancel_io) 695 server->pnfs_curr_ld->cancel_io(lseg); 696 } 697 698 extern unsigned int layoutstats_timer; 699 700 #ifdef NFS_DEBUG 701 void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id); 702 #else 703 static inline void nfs4_print_deviceid(const struct nfs4_deviceid *dev_id) 704 { 705 } 706 707 #endif /* NFS_DEBUG */ 708 #else /* CONFIG_NFS_V4_1 */ 709 710 static inline bool nfs_have_layout(struct inode *inode) 711 { 712 return false; 713 } 714 715 static inline void pnfs_destroy_all_layouts(struct nfs_client *clp) 716 { 717 } 718 719 static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) 720 { 721 } 722 723 static inline void pnfs_destroy_layout_final(struct nfs_inode *nfsi) 724 { 725 } 726 727 static inline int pnfs_layout_handle_reboot(struct nfs_client *clp) 728 { 729 return 0; 730 } 731 732 static inline struct pnfs_layout_segment * 733 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 734 { 735 return NULL; 736 } 737 738 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 739 { 740 } 741 742 static inline int pnfs_return_layout(struct inode *ino) 743 { 744 return 0; 745 } 746 747 static inline int pnfs_commit_and_return_layout(struct inode *inode) 748 { 749 return 0; 750 } 751 752 static inline bool 753 pnfs_ld_layoutret_on_setattr(struct inode *inode) 754 { 755 return false; 756 } 757 758 static inline bool 759 pnfs_ld_read_whole_page(struct inode *inode) 760 { 761 return false; 762 } 763 764 static inline int 765 pnfs_sync_inode(struct inode *inode, bool datasync) 766 { 767 return 0; 768 } 769 770 static inline bool 771 pnfs_layoutcommit_outstanding(struct inode *inode) 772 { 773 return false; 774 } 775 776 777 static inline bool 778 pnfs_roc(struct inode *ino, 779 struct nfs4_layoutreturn_args *args, 780 struct nfs4_layoutreturn_res *res, 781 const struct cred *cred) 782 { 783 return false; 784 } 785 786 static inline int 787 pnfs_roc_done(struct rpc_task *task, 788 struct nfs4_layoutreturn_args **argpp, 789 struct nfs4_layoutreturn_res **respp, 790 int *ret) 791 { 792 return 0; 793 } 794 795 static inline void 796 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 797 struct nfs4_layoutreturn_res *res, 798 int ret) 799 { 800 } 801 802 static inline bool 803 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 804 { 805 return false; 806 } 807 808 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 809 const struct nfs_fh *mntfh, 810 struct nfs_fsinfo *fsinfo) 811 { 812 } 813 814 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 815 { 816 } 817 818 static inline int 819 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 820 struct nfs_commit_info *cinfo) 821 { 822 return PNFS_NOT_ATTEMPTED; 823 } 824 825 static inline struct pnfs_ds_commit_info * 826 pnfs_get_ds_info(struct inode *inode) 827 { 828 return NULL; 829 } 830 831 static inline void 832 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 833 { 834 } 835 836 static inline void 837 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 838 { 839 } 840 841 static inline void 842 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 843 { 844 } 845 846 static inline bool 847 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 848 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 849 { 850 return false; 851 } 852 853 static inline bool 854 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 855 { 856 return false; 857 } 858 859 static inline int 860 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 861 int max) 862 { 863 return 0; 864 } 865 866 static inline void 867 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 868 { 869 } 870 871 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 872 { 873 return 0; 874 } 875 876 static inline bool 877 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 878 struct nfs_server *nfss) 879 { 880 return false; 881 } 882 883 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 884 { 885 return NULL; 886 } 887 888 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 889 { 890 } 891 892 static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 893 struct pnfs_layout_range *dst_range, 894 struct inode *inode) 895 { 896 return false; 897 } 898 899 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 900 struct nfs_open_context *ctx) 901 { 902 } 903 904 static inline void pnfs_parse_lgopen(struct inode *ino, 905 struct nfs4_layoutget *lgp, 906 struct nfs_open_context *ctx) 907 { 908 } 909 910 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 911 { 912 } 913 914 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 915 { 916 return false; 917 } 918 919 #endif /* CONFIG_NFS_V4_1 */ 920 921 #if IS_ENABLED(CONFIG_NFS_V4_2) 922 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 923 #else 924 static inline int 925 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 926 { 927 return 0; 928 } 929 #endif 930 931 #endif /* FS_NFS_PNFS_H */ 932