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 #if IS_ENABLED(CONFIG_NFS_V4) 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, struct nfs4_layoutreturn_args *args, 307 struct nfs4_layoutreturn_res *res, const struct cred *cred, 308 bool sync); 309 int pnfs_roc_done(struct rpc_task *task, struct nfs4_layoutreturn_args **argpp, 310 struct nfs4_layoutreturn_res **respp, int *ret); 311 void pnfs_roc_release(struct nfs4_layoutreturn_args *args, 312 struct nfs4_layoutreturn_res *res, 313 int ret); 314 bool pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task); 315 void pnfs_set_layoutcommit(struct inode *, struct pnfs_layout_segment *, loff_t); 316 void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data); 317 int pnfs_layoutcommit_inode(struct inode *inode, bool sync); 318 int pnfs_generic_sync(struct inode *inode, bool datasync); 319 int pnfs_nfs_generic_sync(struct inode *inode, bool datasync); 320 int _pnfs_return_layout(struct inode *); 321 int pnfs_commit_and_return_layout(struct inode *); 322 void pnfs_ld_write_done(struct nfs_pgio_header *); 323 void pnfs_ld_read_done(struct nfs_pgio_header *); 324 void pnfs_read_resend_pnfs(struct nfs_pgio_header *, unsigned int mirror_idx); 325 struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino, 326 struct nfs_open_context *ctx, 327 loff_t pos, 328 u64 count, 329 enum pnfs_iomode iomode, 330 bool strict_iomode, 331 gfp_t gfp_flags); 332 void pnfs_layoutreturn_retry_later(struct pnfs_layout_hdr *lo, 333 const nfs4_stateid *arg_stateid, 334 const struct pnfs_layout_range *range); 335 void pnfs_layoutreturn_free_lsegs(struct pnfs_layout_hdr *lo, 336 const nfs4_stateid *arg_stateid, 337 const struct pnfs_layout_range *range, 338 const nfs4_stateid *stateid); 339 340 void pnfs_generic_layout_insert_lseg(struct pnfs_layout_hdr *lo, 341 struct pnfs_layout_segment *lseg, 342 bool (*is_after)(const struct pnfs_layout_range *lseg_range, 343 const struct pnfs_layout_range *old), 344 bool (*do_merge)(struct pnfs_layout_segment *lseg, 345 struct pnfs_layout_segment *old), 346 struct list_head *free_me); 347 348 void nfs4_deviceid_mark_client_invalid(struct nfs_client *clp); 349 int pnfs_read_done_resend_to_mds(struct nfs_pgio_header *); 350 int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 351 struct nfs4_threshold *pnfs_mdsthreshold_alloc(void); 352 void pnfs_error_mark_layout_for_return(struct inode *inode, 353 struct pnfs_layout_segment *lseg); 354 void pnfs_layout_return_unused_byclid(struct nfs_client *clp, 355 enum pnfs_iomode iomode); 356 int pnfs_layout_handle_reboot(struct nfs_client *clp); 357 358 /* nfs4_deviceid_flags */ 359 enum { 360 NFS_DEVICEID_INVALID = 0, /* set when MDS clientid recalled */ 361 NFS_DEVICEID_UNAVAILABLE, /* device temporarily unavailable */ 362 NFS_DEVICEID_NOCACHE, /* device may not be cached */ 363 }; 364 365 /* pnfs_dev.c */ 366 struct nfs4_deviceid_node { 367 struct hlist_node node; 368 struct hlist_node tmpnode; 369 const struct pnfs_layoutdriver_type *ld; 370 const struct nfs_client *nfs_client; 371 unsigned long flags; 372 unsigned long timestamp_unavailable; 373 struct nfs4_deviceid deviceid; 374 struct rcu_head rcu; 375 atomic_t ref; 376 }; 377 378 struct nfs4_deviceid_node * 379 nfs4_find_get_deviceid(struct nfs_server *server, 380 const struct nfs4_deviceid *id, const struct cred *cred, 381 gfp_t gfp_mask); 382 void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nfs_client *, const struct nfs4_deviceid *); 383 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *, 384 const struct nfs4_deviceid *); 385 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *); 386 void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node); 387 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node); 388 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node); 389 void nfs4_deviceid_purge_client(const struct nfs_client *); 390 391 /* pnfs_nfs.c */ 392 struct pnfs_commit_array *pnfs_alloc_commit_array(size_t n, gfp_t gfp_flags); 393 void pnfs_free_commit_array(struct pnfs_commit_array *p); 394 struct pnfs_commit_array *pnfs_add_commit_array(struct pnfs_ds_commit_info *, 395 struct pnfs_commit_array *, 396 struct pnfs_layout_segment *); 397 398 void pnfs_generic_ds_cinfo_release_lseg(struct pnfs_ds_commit_info *fl_cinfo, 399 struct pnfs_layout_segment *lseg); 400 void pnfs_generic_ds_cinfo_destroy(struct pnfs_ds_commit_info *fl_cinfo); 401 402 void pnfs_generic_clear_request_commit(struct nfs_page *req, 403 struct nfs_commit_info *cinfo); 404 void pnfs_generic_commit_release(void *calldata); 405 void pnfs_generic_prepare_to_resend_writes(struct nfs_commit_data *data); 406 void pnfs_generic_rw_release(void *data); 407 void pnfs_generic_recover_commit_reqs(struct list_head *dst, 408 struct nfs_commit_info *cinfo); 409 int pnfs_generic_commit_pagelist(struct inode *inode, 410 struct list_head *mds_pages, 411 int how, 412 struct nfs_commit_info *cinfo, 413 int (*initiate_commit)(struct nfs_commit_data *data, 414 int how)); 415 int pnfs_generic_scan_commit_lists(struct nfs_commit_info *cinfo, int max); 416 void pnfs_generic_write_commit_done(struct rpc_task *task, void *data); 417 void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds); 418 struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(const struct net *net, 419 struct list_head *dsaddrs, 420 gfp_t gfp_flags); 421 void nfs4_pnfs_v3_ds_connect_unload(void); 422 int nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds, 423 struct nfs4_deviceid_node *devid, unsigned int timeo, 424 unsigned int retrans, u32 version, u32 minor_version); 425 struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net, 426 struct xdr_stream *xdr, 427 gfp_t gfp_flags); 428 void pnfs_layout_mark_request_commit(struct nfs_page *req, 429 struct pnfs_layout_segment *lseg, 430 struct nfs_commit_info *cinfo, 431 u32 ds_commit_idx); 432 void pnfs_lgopen_prepare(struct nfs4_opendata *data, 433 struct nfs_open_context *ctx); 434 void pnfs_parse_lgopen(struct inode *ino, struct nfs4_layoutget *lgp, 435 struct nfs_open_context *ctx); 436 void nfs4_lgopen_release(struct nfs4_layoutget *lgp); 437 438 static inline bool nfs_have_layout(struct inode *inode) 439 { 440 return NFS_I(inode)->layout != NULL; 441 } 442 443 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 444 { 445 return test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) == 0; 446 } 447 448 static inline struct nfs4_deviceid_node * 449 nfs4_get_deviceid(struct nfs4_deviceid_node *d) 450 { 451 atomic_inc(&d->ref); 452 return d; 453 } 454 455 static inline struct pnfs_layout_segment * 456 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 457 { 458 if (lseg) { 459 refcount_inc(&lseg->pls_refcount); 460 smp_mb__after_atomic(); 461 } 462 return lseg; 463 } 464 465 static inline bool 466 pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg) 467 { 468 return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0; 469 } 470 471 /* Return true if a layout driver is being used for this mountpoint */ 472 static inline int pnfs_enabled_sb(struct nfs_server *nfss) 473 { 474 return nfss->pnfs_curr_ld != NULL; 475 } 476 477 static inline int 478 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 479 struct nfs_commit_info *cinfo) 480 { 481 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 482 483 if (fl_cinfo == NULL || fl_cinfo->ncommitting == 0) 484 return PNFS_NOT_ATTEMPTED; 485 return fl_cinfo->ops->commit_pagelist(inode, mds_pages, how, cinfo); 486 } 487 488 static inline struct pnfs_ds_commit_info * 489 pnfs_get_ds_info(struct inode *inode) 490 { 491 struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; 492 493 if (ld == NULL || ld->get_ds_info == NULL) 494 return NULL; 495 return ld->get_ds_info(inode); 496 } 497 498 static inline void 499 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 500 { 501 struct pnfs_ds_commit_info *inode_cinfo = pnfs_get_ds_info(inode); 502 if (inode_cinfo != NULL) 503 fl_cinfo->ops = inode_cinfo->ops; 504 } 505 506 static inline void 507 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 508 { 509 INIT_LIST_HEAD(&fl_cinfo->commits); 510 fl_cinfo->ops = NULL; 511 } 512 513 static inline void 514 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 515 { 516 if (fl_cinfo->ops != NULL && fl_cinfo->ops->release_ds_info != NULL) 517 fl_cinfo->ops->release_ds_info(fl_cinfo, inode); 518 } 519 520 static inline void 521 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node) 522 { 523 set_bit(NFS_DEVICEID_INVALID, &node->flags); 524 } 525 526 static inline bool 527 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 528 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 529 { 530 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 531 532 if (!lseg || !fl_cinfo->ops || !fl_cinfo->ops->mark_request_commit) 533 return false; 534 fl_cinfo->ops->mark_request_commit(req, lseg, cinfo, ds_commit_idx); 535 return true; 536 } 537 538 static inline bool 539 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 540 { 541 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 542 543 if (!fl_cinfo || !fl_cinfo->ops || !fl_cinfo->ops->clear_request_commit) 544 return false; 545 fl_cinfo->ops->clear_request_commit(req, cinfo); 546 return true; 547 } 548 549 static inline int 550 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 551 int max) 552 { 553 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 554 555 if (!fl_cinfo || fl_cinfo->nwritten == 0) 556 return 0; 557 return fl_cinfo->ops->scan_commit_lists(cinfo, max); 558 } 559 560 static inline void 561 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 562 { 563 struct pnfs_ds_commit_info *fl_cinfo = cinfo->ds; 564 565 if (fl_cinfo && fl_cinfo->nwritten != 0) 566 fl_cinfo->ops->recover_commit_reqs(head, cinfo); 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 */ 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 int pnfs_layout_handle_reboot(struct nfs_client *clp) 727 { 728 return 0; 729 } 730 731 static inline struct pnfs_layout_segment * 732 pnfs_get_lseg(struct pnfs_layout_segment *lseg) 733 { 734 return NULL; 735 } 736 737 static inline void pnfs_put_lseg(struct pnfs_layout_segment *lseg) 738 { 739 } 740 741 static inline int pnfs_return_layout(struct inode *ino) 742 { 743 return 0; 744 } 745 746 static inline int pnfs_commit_and_return_layout(struct inode *inode) 747 { 748 return 0; 749 } 750 751 static inline bool 752 pnfs_ld_layoutret_on_setattr(struct inode *inode) 753 { 754 return false; 755 } 756 757 static inline bool 758 pnfs_ld_read_whole_page(struct inode *inode) 759 { 760 return false; 761 } 762 763 static inline int 764 pnfs_sync_inode(struct inode *inode, bool datasync) 765 { 766 return 0; 767 } 768 769 static inline bool 770 pnfs_layoutcommit_outstanding(struct inode *inode) 771 { 772 return false; 773 } 774 775 static inline bool pnfs_roc(struct inode *ino, 776 struct nfs4_layoutreturn_args *args, 777 struct nfs4_layoutreturn_res *res, 778 const struct cred *cred, bool sync) 779 { 780 return false; 781 } 782 783 static inline int 784 pnfs_roc_done(struct rpc_task *task, 785 struct nfs4_layoutreturn_args **argpp, 786 struct nfs4_layoutreturn_res **respp, 787 int *ret) 788 { 789 return 0; 790 } 791 792 static inline void 793 pnfs_roc_release(struct nfs4_layoutreturn_args *args, 794 struct nfs4_layoutreturn_res *res, 795 int ret) 796 { 797 } 798 799 static inline bool 800 pnfs_wait_on_layoutreturn(struct inode *ino, struct rpc_task *task) 801 { 802 return false; 803 } 804 805 static inline void set_pnfs_layoutdriver(struct nfs_server *s, 806 const struct nfs_fh *mntfh, 807 struct nfs_fsinfo *fsinfo) 808 { 809 } 810 811 static inline void unset_pnfs_layoutdriver(struct nfs_server *s) 812 { 813 } 814 815 static inline int 816 pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, 817 struct nfs_commit_info *cinfo) 818 { 819 return PNFS_NOT_ATTEMPTED; 820 } 821 822 static inline struct pnfs_ds_commit_info * 823 pnfs_get_ds_info(struct inode *inode) 824 { 825 return NULL; 826 } 827 828 static inline void 829 pnfs_init_ds_commit_info_ops(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 830 { 831 } 832 833 static inline void 834 pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo) 835 { 836 } 837 838 static inline void 839 pnfs_release_ds_info(struct pnfs_ds_commit_info *fl_cinfo, struct inode *inode) 840 { 841 } 842 843 static inline bool 844 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg, 845 struct nfs_commit_info *cinfo, u32 ds_commit_idx) 846 { 847 return false; 848 } 849 850 static inline bool 851 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo) 852 { 853 return false; 854 } 855 856 static inline int 857 pnfs_scan_commit_lists(struct inode *inode, struct nfs_commit_info *cinfo, 858 int max) 859 { 860 return 0; 861 } 862 863 static inline void 864 pnfs_recover_commit_reqs(struct list_head *head, struct nfs_commit_info *cinfo) 865 { 866 } 867 868 static inline int pnfs_layoutcommit_inode(struct inode *inode, bool sync) 869 { 870 return 0; 871 } 872 873 static inline bool 874 pnfs_use_threshold(struct nfs4_threshold **dst, struct nfs4_threshold *src, 875 struct nfs_server *nfss) 876 { 877 return false; 878 } 879 880 static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 881 { 882 return NULL; 883 } 884 885 static inline void nfs4_pnfs_v3_ds_connect_unload(void) 886 { 887 } 888 889 static inline bool nfs4_layout_refresh_old_stateid(nfs4_stateid *dst, 890 struct pnfs_layout_range *dst_range, 891 struct inode *inode) 892 { 893 return false; 894 } 895 896 static inline void pnfs_lgopen_prepare(struct nfs4_opendata *data, 897 struct nfs_open_context *ctx) 898 { 899 } 900 901 static inline void pnfs_parse_lgopen(struct inode *ino, 902 struct nfs4_layoutget *lgp, 903 struct nfs_open_context *ctx) 904 { 905 } 906 907 static inline void nfs4_lgopen_release(struct nfs4_layoutget *lgp) 908 { 909 } 910 911 static inline bool pnfs_layout_is_valid(const struct pnfs_layout_hdr *lo) 912 { 913 return false; 914 } 915 916 #endif /* CONFIG_NFS_V4 */ 917 918 #if IS_ENABLED(CONFIG_NFS_V4_2) 919 int pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags); 920 #else 921 static inline int 922 pnfs_report_layoutstat(struct inode *inode, gfp_t gfp_flags) 923 { 924 return 0; 925 } 926 #endif 927 928 #endif /* FS_NFS_PNFS_H */ 929