1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* internal AFS stuff 3 * 4 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 */ 7 8 #include <linux/compiler.h> 9 #include <linux/kernel.h> 10 #include <linux/ktime.h> 11 #include <linux/fs.h> 12 #include <linux/pagemap.h> 13 #include <linux/rxrpc.h> 14 #include <linux/key.h> 15 #include <linux/workqueue.h> 16 #include <linux/sched.h> 17 #include <linux/fscache.h> 18 #include <linux/backing-dev.h> 19 #include <linux/uuid.h> 20 #include <linux/mm_types.h> 21 #include <linux/dns_resolver.h> 22 #include <net/net_namespace.h> 23 #include <net/netns/generic.h> 24 #include <net/sock.h> 25 #include <net/af_rxrpc.h> 26 27 #include "afs.h" 28 #include "afs_vl.h" 29 30 #define AFS_CELL_MAX_ADDRS 15 31 32 struct pagevec; 33 struct afs_call; 34 struct afs_vnode; 35 36 /* 37 * Partial file-locking emulation mode. (The problem being that AFS3 only 38 * allows whole-file locks and no upgrading/downgrading). 39 */ 40 enum afs_flock_mode { 41 afs_flock_mode_unset, 42 afs_flock_mode_local, /* Local locking only */ 43 afs_flock_mode_openafs, /* Don't get server lock for a partial lock */ 44 afs_flock_mode_strict, /* Always get a server lock for a partial lock */ 45 afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */ 46 }; 47 48 struct afs_fs_context { 49 bool force; /* T to force cell type */ 50 bool autocell; /* T if set auto mount operation */ 51 bool dyn_root; /* T if dynamic root */ 52 bool no_cell; /* T if the source is "none" (for dynroot) */ 53 enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */ 54 afs_voltype_t type; /* type of volume requested */ 55 unsigned int volnamesz; /* size of volume name */ 56 const char *volname; /* name of volume to mount */ 57 struct afs_net *net; /* the AFS net namespace stuff */ 58 struct afs_cell *cell; /* cell in which to find volume */ 59 struct afs_volume *volume; /* volume record */ 60 struct key *key; /* key to use for secure mounting */ 61 }; 62 63 enum afs_call_state { 64 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ 65 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ 66 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ 67 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ 68 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ 69 AFS_CALL_SV_REPLYING, /* Server: Replying */ 70 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ 71 AFS_CALL_COMPLETE, /* Completed or failed */ 72 }; 73 74 /* 75 * List of server addresses. 76 */ 77 struct afs_addr_list { 78 struct rcu_head rcu; 79 refcount_t usage; 80 u32 version; /* Version */ 81 unsigned char max_addrs; 82 unsigned char nr_addrs; 83 unsigned char preferred; /* Preferred address */ 84 unsigned char nr_ipv4; /* Number of IPv4 addresses */ 85 enum dns_record_source source:8; 86 enum dns_lookup_status status:8; 87 unsigned long failed; /* Mask of addrs that failed locally/ICMP */ 88 unsigned long responded; /* Mask of addrs that responded */ 89 struct sockaddr_rxrpc addrs[]; 90 #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8)) 91 }; 92 93 /* 94 * a record of an in-progress RxRPC call 95 */ 96 struct afs_call { 97 const struct afs_call_type *type; /* type of call */ 98 struct afs_addr_list *alist; /* Address is alist[addr_ix] */ 99 wait_queue_head_t waitq; /* processes awaiting completion */ 100 struct work_struct async_work; /* async I/O processor */ 101 struct work_struct work; /* actual work processor */ 102 struct rxrpc_call *rxcall; /* RxRPC call handle */ 103 struct key *key; /* security for this call */ 104 struct afs_net *net; /* The network namespace */ 105 struct afs_server *server; /* The fileserver record if fs op (pins ref) */ 106 struct afs_vlserver *vlserver; /* The vlserver record if vl op */ 107 void *request; /* request data (first part) */ 108 size_t iov_len; /* Size of *iter to be used */ 109 struct iov_iter def_iter; /* Default buffer/data iterator */ 110 struct iov_iter *write_iter; /* Iterator defining write to be made */ 111 struct iov_iter *iter; /* Iterator currently in use */ 112 union { /* Convenience for ->def_iter */ 113 struct kvec kvec[1]; 114 struct bio_vec bvec[1]; 115 }; 116 void *buffer; /* reply receive buffer */ 117 union { 118 long ret0; /* Value to reply with instead of 0 */ 119 struct afs_addr_list *ret_alist; 120 struct afs_vldb_entry *ret_vldb; 121 char *ret_str; 122 }; 123 struct afs_operation *op; 124 unsigned int server_index; 125 refcount_t ref; 126 enum afs_call_state state; 127 spinlock_t state_lock; 128 int error; /* error code */ 129 u32 abort_code; /* Remote abort ID or 0 */ 130 unsigned int max_lifespan; /* Maximum lifespan to set if not 0 */ 131 unsigned request_size; /* size of request data */ 132 unsigned reply_max; /* maximum size of reply */ 133 unsigned count2; /* count used in unmarshalling */ 134 unsigned char unmarshall; /* unmarshalling phase */ 135 unsigned char addr_ix; /* Address in ->alist */ 136 bool drop_ref; /* T if need to drop ref for incoming call */ 137 bool need_attention; /* T if RxRPC poked us */ 138 bool async; /* T if asynchronous */ 139 bool upgrade; /* T to request service upgrade */ 140 bool intr; /* T if interruptible */ 141 bool unmarshalling_error; /* T if an unmarshalling error occurred */ 142 u16 service_id; /* Actual service ID (after upgrade) */ 143 unsigned int debug_id; /* Trace ID */ 144 u32 operation_ID; /* operation ID for an incoming call */ 145 u32 count; /* count for use in unmarshalling */ 146 union { /* place to extract temporary data */ 147 struct { 148 __be32 tmp_u; 149 __be32 tmp; 150 } __attribute__((packed)); 151 __be64 tmp64; 152 }; 153 ktime_t issue_time; /* Time of issue of operation */ 154 }; 155 156 struct afs_call_type { 157 const char *name; 158 unsigned int op; /* Really enum afs_fs_operation */ 159 160 /* deliver request or reply data to an call 161 * - returning an error will cause the call to be aborted 162 */ 163 int (*deliver)(struct afs_call *call); 164 165 /* clean up a call */ 166 void (*destructor)(struct afs_call *call); 167 168 /* Work function */ 169 void (*work)(struct work_struct *work); 170 171 /* Call done function (gets called immediately on success or failure) */ 172 void (*done)(struct afs_call *call); 173 }; 174 175 /* 176 * Key available for writeback on a file. 177 */ 178 struct afs_wb_key { 179 refcount_t usage; 180 struct key *key; 181 struct list_head vnode_link; /* Link in vnode->wb_keys */ 182 }; 183 184 /* 185 * AFS open file information record. Pointed to by file->private_data. 186 */ 187 struct afs_file { 188 struct key *key; /* The key this file was opened with */ 189 struct afs_wb_key *wb; /* Writeback key record for this file */ 190 }; 191 afs_file_key(struct file * file)192 static inline struct key *afs_file_key(struct file *file) 193 { 194 struct afs_file *af = file->private_data; 195 196 return af->key; 197 } 198 199 /* 200 * Record of an outstanding read operation on a vnode. 201 */ 202 struct afs_read { 203 loff_t pos; /* Where to start reading */ 204 loff_t len; /* How much we're asking for */ 205 loff_t actual_len; /* How much we're actually getting */ 206 loff_t file_size; /* File size returned by server */ 207 struct key *key; /* The key to use to reissue the read */ 208 struct afs_vnode *vnode; /* The file being read into. */ 209 struct netfs_io_subrequest *subreq; /* Fscache helper read request this belongs to */ 210 afs_dataversion_t data_version; /* Version number returned by server */ 211 refcount_t usage; 212 unsigned int call_debug_id; 213 unsigned int nr_pages; 214 int error; 215 void (*done)(struct afs_read *); 216 void (*cleanup)(struct afs_read *); 217 struct iov_iter *iter; /* Iterator representing the buffer */ 218 struct iov_iter def_iter; /* Default iterator */ 219 }; 220 221 /* 222 * AFS superblock private data 223 * - there's one superblock per volume 224 */ 225 struct afs_super_info { 226 struct net *net_ns; /* Network namespace */ 227 struct afs_cell *cell; /* The cell in which the volume resides */ 228 struct afs_volume *volume; /* volume record */ 229 enum afs_flock_mode flock_mode:8; /* File locking emulation mode */ 230 bool dyn_root; /* True if dynamic root */ 231 }; 232 AFS_FS_S(struct super_block * sb)233 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) 234 { 235 return sb->s_fs_info; 236 } 237 238 extern struct file_system_type afs_fs_type; 239 240 /* 241 * Set of substitutes for @sys. 242 */ 243 struct afs_sysnames { 244 #define AFS_NR_SYSNAME 16 245 char *subs[AFS_NR_SYSNAME]; 246 refcount_t usage; 247 unsigned short nr; 248 char blank[1]; 249 }; 250 251 /* 252 * AFS network namespace record. 253 */ 254 struct afs_net { 255 struct net *net; /* Backpointer to the owning net namespace */ 256 struct afs_uuid uuid; 257 bool live; /* F if this namespace is being removed */ 258 259 /* AF_RXRPC I/O stuff */ 260 struct socket *socket; 261 struct afs_call *spare_incoming_call; 262 struct work_struct charge_preallocation_work; 263 struct mutex socket_mutex; 264 atomic_t nr_outstanding_calls; 265 atomic_t nr_superblocks; 266 267 /* Cell database */ 268 struct rb_root cells; 269 struct afs_cell *ws_cell; 270 struct work_struct cells_manager; 271 struct timer_list cells_timer; 272 atomic_t cells_outstanding; 273 struct rw_semaphore cells_lock; 274 struct mutex cells_alias_lock; 275 276 struct mutex proc_cells_lock; 277 struct hlist_head proc_cells; 278 279 /* Known servers. Theoretically each fileserver can only be in one 280 * cell, but in practice, people create aliases and subsets and there's 281 * no easy way to distinguish them. 282 */ 283 seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */ 284 struct rb_root fs_servers; /* afs_server (by server UUID or address) */ 285 struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */ 286 struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */ 287 struct hlist_head fs_proc; /* procfs servers list */ 288 289 struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ 290 struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */ 291 seqlock_t fs_addr_lock; /* For fs_addresses[46] */ 292 293 struct work_struct fs_manager; 294 struct timer_list fs_timer; 295 296 struct work_struct fs_prober; 297 struct timer_list fs_probe_timer; 298 atomic_t servers_outstanding; 299 300 /* File locking renewal management */ 301 struct mutex lock_manager_mutex; 302 303 /* Misc */ 304 struct super_block *dynroot_sb; /* Dynamic root mount superblock */ 305 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ 306 struct afs_sysnames *sysnames; 307 rwlock_t sysnames_lock; 308 309 /* Statistics counters */ 310 atomic_t n_lookup; /* Number of lookups done */ 311 atomic_t n_reval; /* Number of dentries needing revalidation */ 312 atomic_t n_inval; /* Number of invalidations by the server */ 313 atomic_t n_relpg; /* Number of invalidations by release_folio */ 314 atomic_t n_read_dir; /* Number of directory pages read */ 315 atomic_t n_dir_cr; /* Number of directory entry creation edits */ 316 atomic_t n_dir_rm; /* Number of directory entry removal edits */ 317 atomic_t n_stores; /* Number of store ops */ 318 atomic_long_t n_store_bytes; /* Number of bytes stored */ 319 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ 320 atomic_t n_fetches; /* Number of data fetch ops */ 321 }; 322 323 extern const char afs_init_sysname[]; 324 325 enum afs_cell_state { 326 AFS_CELL_UNSET, 327 AFS_CELL_ACTIVATING, 328 AFS_CELL_ACTIVE, 329 AFS_CELL_DEACTIVATING, 330 AFS_CELL_INACTIVE, 331 AFS_CELL_FAILED, 332 AFS_CELL_REMOVED, 333 }; 334 335 /* 336 * AFS cell record. 337 * 338 * This is a tricky concept to get right as it is possible to create aliases 339 * simply by pointing AFSDB/SRV records for two names at the same set of VL 340 * servers; it is also possible to do things like setting up two sets of VL 341 * servers, one of which provides a superset of the volumes provided by the 342 * other (for internal/external division, for example). 343 * 344 * Cells only exist in the sense that (a) a cell's name maps to a set of VL 345 * servers and (b) a cell's name is used by the client to select the key to use 346 * for authentication and encryption. The cell name is not typically used in 347 * the protocol. 348 * 349 * Two cells are determined to be aliases if they have an explicit alias (YFS 350 * only), share any VL servers in common or have at least one volume in common. 351 * "In common" means that the address list of the VL servers or the fileservers 352 * share at least one endpoint. 353 */ 354 struct afs_cell { 355 union { 356 struct rcu_head rcu; 357 struct rb_node net_node; /* Node in net->cells */ 358 }; 359 struct afs_net *net; 360 struct afs_cell *alias_of; /* The cell this is an alias of */ 361 struct afs_volume *root_volume; /* The root.cell volume if there is one */ 362 struct key *anonymous_key; /* anonymous user key for this cell */ 363 struct work_struct manager; /* Manager for init/deinit/dns */ 364 struct hlist_node proc_link; /* /proc cell list link */ 365 time64_t dns_expiry; /* Time AFSDB/SRV record expires */ 366 time64_t last_inactive; /* Time of last drop of usage count */ 367 refcount_t ref; /* Struct refcount */ 368 atomic_t active; /* Active usage counter */ 369 unsigned long flags; 370 #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */ 371 #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */ 372 #define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */ 373 enum afs_cell_state state; 374 short error; 375 enum dns_record_source dns_source:8; /* Latest source of data from lookup */ 376 enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */ 377 unsigned int dns_lookup_count; /* Counter of DNS lookups */ 378 unsigned int debug_id; 379 380 /* The volumes belonging to this cell */ 381 struct rb_root volumes; /* Tree of volumes on this server */ 382 struct hlist_head proc_volumes; /* procfs volume list */ 383 seqlock_t volume_lock; /* For volumes */ 384 385 /* Active fileserver interaction state. */ 386 struct rb_root fs_servers; /* afs_server (by server UUID) */ 387 seqlock_t fs_lock; /* For fs_servers */ 388 struct rw_semaphore fs_open_mmaps_lock; 389 struct list_head fs_open_mmaps; /* List of vnodes that are mmapped */ 390 atomic_t fs_s_break; /* Counter of CB.InitCallBackState messages */ 391 392 /* VL server list. */ 393 rwlock_t vl_servers_lock; /* Lock on vl_servers */ 394 struct afs_vlserver_list __rcu *vl_servers; 395 396 u8 name_len; /* Length of name */ 397 char *name; /* Cell name, case-flattened and NUL-padded */ 398 }; 399 400 /* 401 * Volume Location server record. 402 */ 403 struct afs_vlserver { 404 struct rcu_head rcu; 405 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */ 406 unsigned long flags; 407 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ 408 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ 409 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ 410 #define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */ 411 rwlock_t lock; /* Lock on addresses */ 412 refcount_t ref; 413 unsigned int rtt; /* Server's current RTT in uS */ 414 415 /* Probe state */ 416 wait_queue_head_t probe_wq; 417 atomic_t probe_outstanding; 418 spinlock_t probe_lock; 419 struct { 420 unsigned int rtt; /* RTT in uS */ 421 u32 abort_code; 422 short error; 423 unsigned short flags; 424 #define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */ 425 #define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */ 426 #define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */ 427 #define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */ 428 } probe; 429 430 u16 port; 431 u16 name_len; /* Length of name */ 432 char name[]; /* Server name, case-flattened */ 433 }; 434 435 /* 436 * Weighted list of Volume Location servers. 437 */ 438 struct afs_vlserver_entry { 439 u16 priority; /* Preference (as SRV) */ 440 u16 weight; /* Weight (as SRV) */ 441 enum dns_record_source source:8; 442 enum dns_lookup_status status:8; 443 struct afs_vlserver *server; 444 }; 445 446 struct afs_vlserver_list { 447 struct rcu_head rcu; 448 refcount_t ref; 449 u8 nr_servers; 450 u8 index; /* Server currently in use */ 451 u8 preferred; /* Preferred server */ 452 enum dns_record_source source:8; 453 enum dns_lookup_status status:8; 454 rwlock_t lock; 455 struct afs_vlserver_entry servers[]; 456 }; 457 458 /* 459 * Cached VLDB entry. 460 * 461 * This is pointed to by cell->vldb_entries, indexed by name. 462 */ 463 struct afs_vldb_entry { 464 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ 465 466 unsigned long flags; 467 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ 468 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ 469 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ 470 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ 471 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ 472 473 uuid_t fs_server[AFS_NMAXNSERVERS]; 474 u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */ 475 u8 fs_mask[AFS_NMAXNSERVERS]; 476 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 477 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 478 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 479 short error; 480 u8 nr_servers; /* Number of server records */ 481 u8 name_len; 482 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 483 }; 484 485 /* 486 * Record of fileserver with which we're actively communicating. 487 */ 488 struct afs_server { 489 struct rcu_head rcu; 490 union { 491 uuid_t uuid; /* Server ID */ 492 struct afs_uuid _uuid; 493 }; 494 495 struct afs_addr_list __rcu *addresses; 496 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 497 struct rb_node uuid_rb; /* Link in net->fs_servers */ 498 struct afs_server __rcu *uuid_next; /* Next server with same UUID */ 499 struct afs_server *uuid_prev; /* Previous server with same UUID */ 500 struct list_head probe_link; /* Link in net->fs_probe_list */ 501 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ 502 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ 503 struct hlist_node proc_link; /* Link in net->fs_proc */ 504 struct work_struct initcb_work; /* Work for CB.InitCallBackState* */ 505 struct afs_server *gc_next; /* Next server in manager's list */ 506 time64_t unuse_time; /* Time at which last unused */ 507 unsigned long flags; 508 #define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */ 509 #define AFS_SERVER_FL_UPDATING 1 510 #define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */ 511 #define AFS_SERVER_FL_NOT_READY 4 /* The record is not ready for use */ 512 #define AFS_SERVER_FL_NOT_FOUND 5 /* VL server says no such server */ 513 #define AFS_SERVER_FL_VL_FAIL 6 /* Failed to access VL server */ 514 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ 515 #define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */ 516 #define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */ 517 #define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */ 518 #define AFS_SERVER_FL_HAS_FS64 19 /* Fileserver supports FS.{Fetch,Store}Data64 */ 519 refcount_t ref; /* Object refcount */ 520 atomic_t active; /* Active user count */ 521 u32 addr_version; /* Address list version */ 522 unsigned int rtt; /* Server's current RTT in uS */ 523 unsigned int debug_id; /* Debugging ID for traces */ 524 525 /* file service access */ 526 rwlock_t fs_lock; /* access lock */ 527 528 /* callback promise management */ 529 unsigned cb_s_break; /* Break-everything counter. */ 530 531 /* Probe state */ 532 unsigned long probed_at; /* Time last probe was dispatched (jiffies) */ 533 wait_queue_head_t probe_wq; 534 atomic_t probe_outstanding; 535 spinlock_t probe_lock; 536 struct { 537 unsigned int rtt; /* RTT in uS */ 538 u32 abort_code; 539 short error; 540 bool responded:1; 541 bool is_yfs:1; 542 bool not_yfs:1; 543 bool local_failure:1; 544 } probe; 545 }; 546 547 /* 548 * Replaceable volume server list. 549 */ 550 struct afs_server_entry { 551 struct afs_server *server; 552 }; 553 554 struct afs_server_list { 555 struct rcu_head rcu; 556 afs_volid_t vids[AFS_MAXTYPES]; /* Volume IDs */ 557 refcount_t usage; 558 unsigned char nr_servers; 559 unsigned char preferred; /* Preferred server */ 560 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ 561 unsigned int seq; /* Set to ->servers_seq when installed */ 562 rwlock_t lock; 563 struct afs_server_entry servers[]; 564 }; 565 566 /* 567 * Live AFS volume management. 568 */ 569 struct afs_volume { 570 union { 571 struct rcu_head rcu; 572 afs_volid_t vid; /* volume ID */ 573 }; 574 refcount_t ref; 575 time64_t update_at; /* Time at which to next update */ 576 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 577 struct rb_node cell_node; /* Link in cell->volumes */ 578 struct hlist_node proc_link; /* Link in cell->proc_volumes */ 579 struct super_block __rcu *sb; /* Superblock on which inodes reside */ 580 unsigned long flags; 581 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ 582 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ 583 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ 584 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ 585 #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ 586 #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ 587 #define AFS_VOLUME_MAYBE_NO_IBULK 6 /* - T if some servers don't have InlineBulkStatus */ 588 #define AFS_VOLUME_RM_TREE 7 /* - Set if volume removed from cell->volumes */ 589 #ifdef CONFIG_AFS_FSCACHE 590 struct fscache_volume *cache; /* Caching cookie */ 591 #endif 592 struct afs_server_list __rcu *servers; /* List of servers on which volume resides */ 593 rwlock_t servers_lock; /* Lock for ->servers */ 594 unsigned int servers_seq; /* Incremented each time ->servers changes */ 595 596 unsigned cb_v_break; /* Break-everything counter. */ 597 rwlock_t cb_v_break_lock; 598 599 afs_voltype_t type; /* type of volume */ 600 char type_force; /* force volume type (suppress R/O -> R/W) */ 601 u8 name_len; 602 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 603 }; 604 605 enum afs_lock_state { 606 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ 607 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ 608 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ 609 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ 610 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ 611 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ 612 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ 613 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */ 614 }; 615 616 /* 617 * AFS inode private data. 618 * 619 * Note that afs_alloc_inode() *must* reset anything that could incorrectly 620 * leak from one inode to another. 621 */ 622 struct afs_vnode { 623 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 624 struct afs_volume *volume; /* volume on which vnode resides */ 625 struct afs_fid fid; /* the file identifier for this inode */ 626 struct afs_file_status status; /* AFS status info for this file */ 627 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ 628 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ 629 struct mutex io_lock; /* Lock for serialising I/O on this mutex */ 630 struct rw_semaphore validate_lock; /* lock for validating this vnode */ 631 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ 632 struct key *silly_key; /* Silly rename key */ 633 spinlock_t wb_lock; /* lock for wb_keys */ 634 spinlock_t lock; /* waitqueue/flags lock */ 635 unsigned long flags; 636 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ 637 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 638 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ 639 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 640 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 641 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 642 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ 643 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ 644 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ 645 #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */ 646 #define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */ 647 648 struct list_head wb_keys; /* List of keys available for writeback */ 649 struct list_head pending_locks; /* locks waiting to be granted */ 650 struct list_head granted_locks; /* locks granted on this file */ 651 struct delayed_work lock_work; /* work to be done in locking */ 652 struct key *lock_key; /* Key to be used in lock ops */ 653 ktime_t locked_at; /* Time at which lock obtained */ 654 enum afs_lock_state lock_state : 8; 655 afs_lock_type_t lock_type : 8; 656 657 /* outstanding callback notification on this file */ 658 struct work_struct cb_work; /* Work for mmap'd files */ 659 struct list_head cb_mmap_link; /* Link in cell->fs_open_mmaps */ 660 void *cb_server; /* Server with callback/filelock */ 661 atomic_t cb_nr_mmap; /* Number of mmaps */ 662 unsigned int cb_fs_s_break; /* Mass server break counter (cell->fs_s_break) */ 663 unsigned int cb_s_break; /* Mass break counter on ->server */ 664 unsigned int cb_v_break; /* Mass break counter on ->volume */ 665 unsigned int cb_break; /* Break counter on vnode */ 666 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ 667 668 time64_t cb_expires_at; /* time at which callback expires */ 669 }; 670 afs_vnode_cache(struct afs_vnode * vnode)671 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) 672 { 673 #ifdef CONFIG_AFS_FSCACHE 674 return netfs_i_cookie(&vnode->netfs); 675 #else 676 return NULL; 677 #endif 678 } 679 afs_vnode_set_cache(struct afs_vnode * vnode,struct fscache_cookie * cookie)680 static inline void afs_vnode_set_cache(struct afs_vnode *vnode, 681 struct fscache_cookie *cookie) 682 { 683 #ifdef CONFIG_AFS_FSCACHE 684 vnode->netfs.cache = cookie; 685 if (cookie) 686 mapping_set_release_always(vnode->netfs.inode.i_mapping); 687 #endif 688 } 689 690 /* 691 * cached security record for one user's attempt to access a vnode 692 */ 693 struct afs_permit { 694 struct key *key; /* RxRPC ticket holding a security context */ 695 afs_access_t access; /* CallerAccess value for this key */ 696 }; 697 698 /* 699 * Immutable cache of CallerAccess records from attempts to access vnodes. 700 * These may be shared between multiple vnodes. 701 */ 702 struct afs_permits { 703 struct rcu_head rcu; 704 struct hlist_node hash_node; /* Link in hash */ 705 unsigned long h; /* Hash value for this permit list */ 706 refcount_t usage; 707 unsigned short nr_permits; /* Number of records */ 708 bool invalidated; /* Invalidated due to key change */ 709 struct afs_permit permits[]; /* List of permits sorted by key pointer */ 710 }; 711 712 /* 713 * Error prioritisation and accumulation. 714 */ 715 struct afs_error { 716 short error; /* Accumulated error */ 717 bool responded; /* T if server responded */ 718 }; 719 720 /* 721 * Cursor for iterating over a server's address list. 722 */ 723 struct afs_addr_cursor { 724 struct afs_addr_list *alist; /* Current address list (pins ref) */ 725 unsigned long tried; /* Tried addresses */ 726 signed char index; /* Current address */ 727 bool responded; /* T if the current address responded */ 728 unsigned short nr_iterations; /* Number of address iterations */ 729 short error; 730 u32 abort_code; 731 }; 732 733 /* 734 * Cursor for iterating over a set of volume location servers. 735 */ 736 struct afs_vl_cursor { 737 struct afs_addr_cursor ac; 738 struct afs_cell *cell; /* The cell we're querying */ 739 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ 740 struct afs_vlserver *server; /* Server on which this resides */ 741 struct key *key; /* Key for the server */ 742 unsigned long untried; /* Bitmask of untried servers */ 743 short index; /* Current server */ 744 short error; 745 unsigned short flags; 746 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ 747 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ 748 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ 749 unsigned short nr_iterations; /* Number of server iterations */ 750 }; 751 752 /* 753 * Fileserver operation methods. 754 */ 755 struct afs_operation_ops { 756 void (*issue_afs_rpc)(struct afs_operation *op); 757 void (*issue_yfs_rpc)(struct afs_operation *op); 758 void (*success)(struct afs_operation *op); 759 void (*aborted)(struct afs_operation *op); 760 void (*failed)(struct afs_operation *op); 761 void (*edit_dir)(struct afs_operation *op); 762 void (*put)(struct afs_operation *op); 763 }; 764 765 struct afs_vnode_param { 766 struct afs_vnode *vnode; 767 struct afs_fid fid; /* Fid to access */ 768 struct afs_status_cb scb; /* Returned status and callback promise */ 769 afs_dataversion_t dv_before; /* Data version before the call */ 770 unsigned int cb_break_before; /* cb_break + cb_s_break before the call */ 771 u8 dv_delta; /* Expected change in data version */ 772 bool put_vnode:1; /* T if we have a ref on the vnode */ 773 bool need_io_lock:1; /* T if we need the I/O lock on this */ 774 bool update_ctime:1; /* Need to update the ctime */ 775 bool set_size:1; /* Must update i_size */ 776 bool op_unlinked:1; /* True if file was unlinked by op */ 777 bool speculative:1; /* T if speculative status fetch (no vnode lock) */ 778 bool modification:1; /* Set if the content gets modified */ 779 }; 780 781 /* 782 * Fileserver operation wrapper, handling server and address rotation 783 * asynchronously. May make simultaneous calls to multiple servers. 784 */ 785 struct afs_operation { 786 struct afs_net *net; /* Network namespace */ 787 struct key *key; /* Key for the cell */ 788 const struct afs_call_type *type; /* Type of call done */ 789 const struct afs_operation_ops *ops; 790 791 /* Parameters/results for the operation */ 792 struct afs_volume *volume; /* Volume being accessed */ 793 struct afs_vnode_param file[2]; 794 struct afs_vnode_param *more_files; 795 struct afs_volsync volsync; 796 struct dentry *dentry; /* Dentry to be altered */ 797 struct dentry *dentry_2; /* Second dentry to be altered */ 798 struct timespec64 mtime; /* Modification time to record */ 799 struct timespec64 ctime; /* Change time to set */ 800 short nr_files; /* Number of entries in file[], more_files */ 801 short error; 802 unsigned int debug_id; 803 804 unsigned int cb_v_break; /* Volume break counter before op */ 805 unsigned int cb_s_break; /* Server break counter before op */ 806 807 union { 808 struct { 809 int which; /* Which ->file[] to fetch for */ 810 } fetch_status; 811 struct { 812 int reason; /* enum afs_edit_dir_reason */ 813 mode_t mode; 814 const char *symlink; 815 } create; 816 struct { 817 bool need_rehash; 818 } unlink; 819 struct { 820 struct dentry *rehash; 821 struct dentry *tmp; 822 bool new_negative; 823 } rename; 824 struct { 825 struct afs_read *req; 826 } fetch; 827 struct { 828 afs_lock_type_t type; 829 } lock; 830 struct { 831 struct iov_iter *write_iter; 832 loff_t pos; 833 loff_t size; 834 loff_t i_size; 835 bool laundering; /* Laundering page, PG_writeback not set */ 836 } store; 837 struct { 838 struct iattr *attr; 839 loff_t old_i_size; 840 } setattr; 841 struct afs_acl *acl; 842 struct yfs_acl *yacl; 843 struct { 844 struct afs_volume_status vs; 845 struct kstatfs *buf; 846 } volstatus; 847 }; 848 849 /* Fileserver iteration state */ 850 struct afs_addr_cursor ac; 851 struct afs_server_list *server_list; /* Current server list (pins ref) */ 852 struct afs_server *server; /* Server we're using (ref pinned by server_list) */ 853 struct afs_call *call; 854 unsigned long untried; /* Bitmask of untried servers */ 855 short index; /* Current server */ 856 unsigned short nr_iterations; /* Number of server iterations */ 857 858 unsigned int flags; 859 #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ 860 #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ 861 #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ 862 #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ 863 #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ 864 #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ 865 #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ 866 #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ 867 #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ 868 #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ 869 #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ 870 #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ 871 #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ 872 }; 873 874 /* 875 * Cache auxiliary data. 876 */ 877 struct afs_vnode_cache_aux { 878 __be64 data_version; 879 } __packed; 880 afs_set_cache_aux(struct afs_vnode * vnode,struct afs_vnode_cache_aux * aux)881 static inline void afs_set_cache_aux(struct afs_vnode *vnode, 882 struct afs_vnode_cache_aux *aux) 883 { 884 aux->data_version = cpu_to_be64(vnode->status.data_version); 885 } 886 afs_invalidate_cache(struct afs_vnode * vnode,unsigned int flags)887 static inline void afs_invalidate_cache(struct afs_vnode *vnode, unsigned int flags) 888 { 889 struct afs_vnode_cache_aux aux; 890 891 afs_set_cache_aux(vnode, &aux); 892 fscache_invalidate(afs_vnode_cache(vnode), &aux, 893 i_size_read(&vnode->netfs.inode), flags); 894 } 895 896 /* 897 * We use folio->private to hold the amount of the folio that we've written to, 898 * splitting the field into two parts. However, we need to represent a range 899 * 0...FOLIO_SIZE, so we reduce the resolution if the size of the folio 900 * exceeds what we can encode. 901 */ 902 #ifdef CONFIG_64BIT 903 #define __AFS_FOLIO_PRIV_MASK 0x7fffffffUL 904 #define __AFS_FOLIO_PRIV_SHIFT 32 905 #define __AFS_FOLIO_PRIV_MMAPPED 0x80000000UL 906 #else 907 #define __AFS_FOLIO_PRIV_MASK 0x7fffUL 908 #define __AFS_FOLIO_PRIV_SHIFT 16 909 #define __AFS_FOLIO_PRIV_MMAPPED 0x8000UL 910 #endif 911 afs_folio_dirty_resolution(struct folio * folio)912 static inline unsigned int afs_folio_dirty_resolution(struct folio *folio) 913 { 914 int shift = folio_shift(folio) - (__AFS_FOLIO_PRIV_SHIFT - 1); 915 return (shift > 0) ? shift : 0; 916 } 917 afs_folio_dirty_from(struct folio * folio,unsigned long priv)918 static inline size_t afs_folio_dirty_from(struct folio *folio, unsigned long priv) 919 { 920 unsigned long x = priv & __AFS_FOLIO_PRIV_MASK; 921 922 /* The lower bound is inclusive */ 923 return x << afs_folio_dirty_resolution(folio); 924 } 925 afs_folio_dirty_to(struct folio * folio,unsigned long priv)926 static inline size_t afs_folio_dirty_to(struct folio *folio, unsigned long priv) 927 { 928 unsigned long x = (priv >> __AFS_FOLIO_PRIV_SHIFT) & __AFS_FOLIO_PRIV_MASK; 929 930 /* The upper bound is immediately beyond the region */ 931 return (x + 1) << afs_folio_dirty_resolution(folio); 932 } 933 afs_folio_dirty(struct folio * folio,size_t from,size_t to)934 static inline unsigned long afs_folio_dirty(struct folio *folio, size_t from, size_t to) 935 { 936 unsigned int res = afs_folio_dirty_resolution(folio); 937 from >>= res; 938 to = (to - 1) >> res; 939 return (to << __AFS_FOLIO_PRIV_SHIFT) | from; 940 } 941 afs_folio_dirty_mmapped(unsigned long priv)942 static inline unsigned long afs_folio_dirty_mmapped(unsigned long priv) 943 { 944 return priv | __AFS_FOLIO_PRIV_MMAPPED; 945 } 946 afs_is_folio_dirty_mmapped(unsigned long priv)947 static inline bool afs_is_folio_dirty_mmapped(unsigned long priv) 948 { 949 return priv & __AFS_FOLIO_PRIV_MMAPPED; 950 } 951 952 #include <trace/events/afs.h> 953 954 /*****************************************************************************/ 955 /* 956 * addr_list.c 957 */ afs_get_addrlist(struct afs_addr_list * alist)958 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) 959 { 960 if (alist) 961 refcount_inc(&alist->usage); 962 return alist; 963 } 964 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, 965 unsigned short, 966 unsigned short); 967 extern void afs_put_addrlist(struct afs_addr_list *); 968 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, 969 const char *, size_t, char, 970 unsigned short, unsigned short); 971 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); 972 extern bool afs_iterate_addresses(struct afs_addr_cursor *); 973 extern int afs_end_cursor(struct afs_addr_cursor *); 974 975 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); 976 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); 977 978 /* 979 * cache.c 980 */ 981 #ifdef CONFIG_AFS_FSCACHE 982 extern struct fscache_netfs afs_cache_netfs; 983 #endif 984 985 /* 986 * callback.c 987 */ 988 extern void afs_invalidate_mmap_work(struct work_struct *); 989 extern void afs_server_init_callback_work(struct work_struct *work); 990 extern void afs_init_callback_state(struct afs_server *); 991 extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 992 extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 993 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); 994 afs_calc_vnode_cb_break(struct afs_vnode * vnode)995 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) 996 { 997 return vnode->cb_break + vnode->cb_v_break; 998 } 999 afs_cb_is_broken(unsigned int cb_break,const struct afs_vnode * vnode)1000 static inline bool afs_cb_is_broken(unsigned int cb_break, 1001 const struct afs_vnode *vnode) 1002 { 1003 return cb_break != (vnode->cb_break + vnode->volume->cb_v_break); 1004 } 1005 1006 /* 1007 * cell.c 1008 */ 1009 extern int afs_cell_init(struct afs_net *, const char *); 1010 extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, 1011 enum afs_cell_trace); 1012 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, 1013 const char *, bool); 1014 extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); 1015 extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace); 1016 extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); 1017 extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); 1018 extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); 1019 extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); 1020 extern void afs_manage_cells(struct work_struct *); 1021 extern void afs_cells_timer(struct timer_list *); 1022 extern void __net_exit afs_cell_purge(struct afs_net *); 1023 1024 /* 1025 * cmservice.c 1026 */ 1027 extern bool afs_cm_incoming_call(struct afs_call *); 1028 1029 /* 1030 * dir.c 1031 */ 1032 extern const struct file_operations afs_dir_file_operations; 1033 extern const struct inode_operations afs_dir_inode_operations; 1034 extern const struct address_space_operations afs_dir_aops; 1035 extern const struct dentry_operations afs_fs_dentry_operations; 1036 1037 extern void afs_d_release(struct dentry *); 1038 extern void afs_check_for_remote_deletion(struct afs_operation *); 1039 1040 /* 1041 * dir_edit.c 1042 */ 1043 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, 1044 enum afs_edit_dir_reason); 1045 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); 1046 1047 /* 1048 * dir_silly.c 1049 */ 1050 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, 1051 struct dentry *, struct key *); 1052 extern int afs_silly_iput(struct dentry *, struct inode *); 1053 1054 /* 1055 * dynroot.c 1056 */ 1057 extern const struct inode_operations afs_dynroot_inode_operations; 1058 extern const struct dentry_operations afs_dynroot_dentry_operations; 1059 1060 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); 1061 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); 1062 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); 1063 extern int afs_dynroot_populate(struct super_block *); 1064 extern void afs_dynroot_depopulate(struct super_block *); 1065 1066 /* 1067 * file.c 1068 */ 1069 extern const struct address_space_operations afs_file_aops; 1070 extern const struct address_space_operations afs_symlink_aops; 1071 extern const struct inode_operations afs_file_inode_operations; 1072 extern const struct file_operations afs_file_operations; 1073 extern const struct netfs_request_ops afs_req_ops; 1074 1075 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); 1076 extern void afs_put_wb_key(struct afs_wb_key *); 1077 extern int afs_open(struct inode *, struct file *); 1078 extern int afs_release(struct inode *, struct file *); 1079 extern int afs_fetch_data(struct afs_vnode *, struct afs_read *); 1080 extern struct afs_read *afs_alloc_read(gfp_t); 1081 extern void afs_put_read(struct afs_read *); 1082 extern int afs_write_inode(struct inode *, struct writeback_control *); 1083 afs_get_read(struct afs_read * req)1084 static inline struct afs_read *afs_get_read(struct afs_read *req) 1085 { 1086 refcount_inc(&req->usage); 1087 return req; 1088 } 1089 1090 /* 1091 * flock.c 1092 */ 1093 extern struct workqueue_struct *afs_lock_manager; 1094 1095 extern void afs_lock_op_done(struct afs_call *); 1096 extern void afs_lock_work(struct work_struct *); 1097 extern void afs_lock_may_be_available(struct afs_vnode *); 1098 extern int afs_lock(struct file *, int, struct file_lock *); 1099 extern int afs_flock(struct file *, int, struct file_lock *); 1100 1101 /* 1102 * fsclient.c 1103 */ 1104 extern void afs_fs_fetch_status(struct afs_operation *); 1105 extern void afs_fs_fetch_data(struct afs_operation *); 1106 extern void afs_fs_create_file(struct afs_operation *); 1107 extern void afs_fs_make_dir(struct afs_operation *); 1108 extern void afs_fs_remove_file(struct afs_operation *); 1109 extern void afs_fs_remove_dir(struct afs_operation *); 1110 extern void afs_fs_link(struct afs_operation *); 1111 extern void afs_fs_symlink(struct afs_operation *); 1112 extern void afs_fs_rename(struct afs_operation *); 1113 extern void afs_fs_store_data(struct afs_operation *); 1114 extern void afs_fs_setattr(struct afs_operation *); 1115 extern void afs_fs_get_volume_status(struct afs_operation *); 1116 extern void afs_fs_set_lock(struct afs_operation *); 1117 extern void afs_fs_extend_lock(struct afs_operation *); 1118 extern void afs_fs_release_lock(struct afs_operation *); 1119 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, 1120 struct afs_addr_cursor *, struct key *); 1121 extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *, 1122 struct afs_addr_cursor *, struct key *); 1123 extern void afs_fs_inline_bulk_status(struct afs_operation *); 1124 1125 struct afs_acl { 1126 u32 size; 1127 u8 data[]; 1128 }; 1129 1130 extern void afs_fs_fetch_acl(struct afs_operation *); 1131 extern void afs_fs_store_acl(struct afs_operation *); 1132 1133 /* 1134 * fs_operation.c 1135 */ 1136 extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); 1137 extern int afs_put_operation(struct afs_operation *); 1138 extern bool afs_begin_vnode_operation(struct afs_operation *); 1139 extern void afs_wait_for_operation(struct afs_operation *); 1140 extern int afs_do_sync_operation(struct afs_operation *); 1141 afs_op_nomem(struct afs_operation * op)1142 static inline void afs_op_nomem(struct afs_operation *op) 1143 { 1144 op->error = -ENOMEM; 1145 } 1146 afs_op_set_vnode(struct afs_operation * op,unsigned int n,struct afs_vnode * vnode)1147 static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, 1148 struct afs_vnode *vnode) 1149 { 1150 op->file[n].vnode = vnode; 1151 op->file[n].need_io_lock = true; 1152 } 1153 afs_op_set_fid(struct afs_operation * op,unsigned int n,const struct afs_fid * fid)1154 static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, 1155 const struct afs_fid *fid) 1156 { 1157 op->file[n].fid = *fid; 1158 } 1159 1160 /* 1161 * fs_probe.c 1162 */ 1163 extern void afs_fileserver_probe_result(struct afs_call *); 1164 extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool); 1165 extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long); 1166 extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); 1167 extern void afs_fs_probe_dispatcher(struct work_struct *); 1168 extern int afs_wait_for_one_fs_probe(struct afs_server *, bool); 1169 extern void afs_fs_probe_cleanup(struct afs_net *); 1170 1171 /* 1172 * inode.c 1173 */ 1174 extern const struct afs_operation_ops afs_fetch_status_operation; 1175 1176 extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); 1177 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); 1178 extern int afs_ilookup5_test_by_fid(struct inode *, void *); 1179 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); 1180 extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); 1181 extern struct inode *afs_root_iget(struct super_block *, struct key *); 1182 extern bool afs_check_validity(struct afs_vnode *); 1183 extern int afs_validate(struct afs_vnode *, struct key *); 1184 extern int afs_getattr(struct user_namespace *mnt_userns, const struct path *, 1185 struct kstat *, u32, unsigned int); 1186 extern int afs_setattr(struct user_namespace *mnt_userns, struct dentry *, struct iattr *); 1187 extern void afs_evict_inode(struct inode *); 1188 extern int afs_drop_inode(struct inode *); 1189 1190 /* 1191 * main.c 1192 */ 1193 extern struct workqueue_struct *afs_wq; 1194 extern int afs_net_id; 1195 afs_net(struct net * net)1196 static inline struct afs_net *afs_net(struct net *net) 1197 { 1198 return net_generic(net, afs_net_id); 1199 } 1200 afs_sb2net(struct super_block * sb)1201 static inline struct afs_net *afs_sb2net(struct super_block *sb) 1202 { 1203 return afs_net(AFS_FS_S(sb)->net_ns); 1204 } 1205 afs_d2net(struct dentry * dentry)1206 static inline struct afs_net *afs_d2net(struct dentry *dentry) 1207 { 1208 return afs_sb2net(dentry->d_sb); 1209 } 1210 afs_i2net(struct inode * inode)1211 static inline struct afs_net *afs_i2net(struct inode *inode) 1212 { 1213 return afs_sb2net(inode->i_sb); 1214 } 1215 afs_v2net(struct afs_vnode * vnode)1216 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 1217 { 1218 return afs_i2net(&vnode->netfs.inode); 1219 } 1220 afs_sock2net(struct sock * sk)1221 static inline struct afs_net *afs_sock2net(struct sock *sk) 1222 { 1223 return net_generic(sock_net(sk), afs_net_id); 1224 } 1225 __afs_stat(atomic_t * s)1226 static inline void __afs_stat(atomic_t *s) 1227 { 1228 atomic_inc(s); 1229 } 1230 1231 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) 1232 1233 /* 1234 * misc.c 1235 */ 1236 extern int afs_abort_to_error(u32); 1237 extern void afs_prioritise_error(struct afs_error *, int, u32); 1238 1239 /* 1240 * mntpt.c 1241 */ 1242 extern const struct inode_operations afs_mntpt_inode_operations; 1243 extern const struct inode_operations afs_autocell_inode_operations; 1244 extern const struct file_operations afs_mntpt_file_operations; 1245 1246 extern struct vfsmount *afs_d_automount(struct path *); 1247 extern void afs_mntpt_kill_timer(void); 1248 1249 /* 1250 * proc.c 1251 */ 1252 #ifdef CONFIG_PROC_FS 1253 extern int __net_init afs_proc_init(struct afs_net *); 1254 extern void __net_exit afs_proc_cleanup(struct afs_net *); 1255 extern int afs_proc_cell_setup(struct afs_cell *); 1256 extern void afs_proc_cell_remove(struct afs_cell *); 1257 extern void afs_put_sysnames(struct afs_sysnames *); 1258 #else afs_proc_init(struct afs_net * net)1259 static inline int afs_proc_init(struct afs_net *net) { return 0; } afs_proc_cleanup(struct afs_net * net)1260 static inline void afs_proc_cleanup(struct afs_net *net) {} afs_proc_cell_setup(struct afs_cell * cell)1261 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } afs_proc_cell_remove(struct afs_cell * cell)1262 static inline void afs_proc_cell_remove(struct afs_cell *cell) {} afs_put_sysnames(struct afs_sysnames * sysnames)1263 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} 1264 #endif 1265 1266 /* 1267 * rotate.c 1268 */ 1269 extern bool afs_select_fileserver(struct afs_operation *); 1270 extern void afs_dump_edestaddrreq(const struct afs_operation *); 1271 1272 /* 1273 * rxrpc.c 1274 */ 1275 extern struct workqueue_struct *afs_async_calls; 1276 1277 extern int __net_init afs_open_socket(struct afs_net *); 1278 extern void __net_exit afs_close_socket(struct afs_net *); 1279 extern void afs_charge_preallocation(struct work_struct *); 1280 extern void afs_put_call(struct afs_call *); 1281 extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t); 1282 extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *); 1283 extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 1284 const struct afs_call_type *, 1285 size_t, size_t); 1286 extern void afs_flat_call_destructor(struct afs_call *); 1287 extern void afs_send_empty_reply(struct afs_call *); 1288 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 1289 extern int afs_extract_data(struct afs_call *, bool); 1290 extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); 1291 afs_make_op_call(struct afs_operation * op,struct afs_call * call,gfp_t gfp)1292 static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, 1293 gfp_t gfp) 1294 { 1295 op->call = call; 1296 op->type = call->type; 1297 call->op = op; 1298 call->key = op->key; 1299 call->intr = !(op->flags & AFS_OPERATION_UNINTR); 1300 afs_make_call(&op->ac, call, gfp); 1301 } 1302 afs_extract_begin(struct afs_call * call,void * buf,size_t size)1303 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) 1304 { 1305 call->iov_len = size; 1306 call->kvec[0].iov_base = buf; 1307 call->kvec[0].iov_len = size; 1308 iov_iter_kvec(&call->def_iter, ITER_DEST, call->kvec, 1, size); 1309 } 1310 afs_extract_to_tmp(struct afs_call * call)1311 static inline void afs_extract_to_tmp(struct afs_call *call) 1312 { 1313 call->iov_len = sizeof(call->tmp); 1314 afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); 1315 } 1316 afs_extract_to_tmp64(struct afs_call * call)1317 static inline void afs_extract_to_tmp64(struct afs_call *call) 1318 { 1319 call->iov_len = sizeof(call->tmp64); 1320 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); 1321 } 1322 afs_extract_discard(struct afs_call * call,size_t size)1323 static inline void afs_extract_discard(struct afs_call *call, size_t size) 1324 { 1325 call->iov_len = size; 1326 iov_iter_discard(&call->def_iter, ITER_DEST, size); 1327 } 1328 afs_extract_to_buf(struct afs_call * call,size_t size)1329 static inline void afs_extract_to_buf(struct afs_call *call, size_t size) 1330 { 1331 call->iov_len = size; 1332 afs_extract_begin(call, call->buffer, size); 1333 } 1334 afs_transfer_reply(struct afs_call * call)1335 static inline int afs_transfer_reply(struct afs_call *call) 1336 { 1337 return afs_extract_data(call, false); 1338 } 1339 afs_check_call_state(struct afs_call * call,enum afs_call_state state)1340 static inline bool afs_check_call_state(struct afs_call *call, 1341 enum afs_call_state state) 1342 { 1343 return READ_ONCE(call->state) == state; 1344 } 1345 afs_set_call_state(struct afs_call * call,enum afs_call_state from,enum afs_call_state to)1346 static inline bool afs_set_call_state(struct afs_call *call, 1347 enum afs_call_state from, 1348 enum afs_call_state to) 1349 { 1350 bool ok = false; 1351 1352 spin_lock_bh(&call->state_lock); 1353 if (call->state == from) { 1354 call->state = to; 1355 trace_afs_call_state(call, from, to, 0, 0); 1356 ok = true; 1357 } 1358 spin_unlock_bh(&call->state_lock); 1359 return ok; 1360 } 1361 afs_set_call_complete(struct afs_call * call,int error,u32 remote_abort)1362 static inline void afs_set_call_complete(struct afs_call *call, 1363 int error, u32 remote_abort) 1364 { 1365 enum afs_call_state state; 1366 bool ok = false; 1367 1368 spin_lock_bh(&call->state_lock); 1369 state = call->state; 1370 if (state != AFS_CALL_COMPLETE) { 1371 call->abort_code = remote_abort; 1372 call->error = error; 1373 call->state = AFS_CALL_COMPLETE; 1374 trace_afs_call_state(call, state, AFS_CALL_COMPLETE, 1375 error, remote_abort); 1376 ok = true; 1377 } 1378 spin_unlock_bh(&call->state_lock); 1379 if (ok) { 1380 trace_afs_call_done(call); 1381 1382 /* Asynchronous calls have two refs to release - one from the alloc and 1383 * one queued with the work item - and we can't just deallocate the 1384 * call because the work item may be queued again. 1385 */ 1386 if (call->drop_ref) 1387 afs_put_call(call); 1388 } 1389 } 1390 1391 /* 1392 * security.c 1393 */ 1394 extern void afs_put_permits(struct afs_permits *); 1395 extern void afs_clear_permits(struct afs_vnode *); 1396 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, 1397 struct afs_status_cb *); 1398 extern void afs_zap_permits(struct rcu_head *); 1399 extern struct key *afs_request_key(struct afs_cell *); 1400 extern struct key *afs_request_key_rcu(struct afs_cell *); 1401 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); 1402 extern int afs_permission(struct user_namespace *, struct inode *, int); 1403 extern void __exit afs_clean_up_permit_cache(void); 1404 1405 /* 1406 * server.c 1407 */ 1408 extern spinlock_t afs_server_peer_lock; 1409 1410 extern struct afs_server *afs_find_server(struct afs_net *, 1411 const struct sockaddr_rxrpc *); 1412 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); 1413 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); 1414 extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); 1415 extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace); 1416 extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1417 extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace); 1418 extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1419 extern void afs_manage_servers(struct work_struct *); 1420 extern void afs_servers_timer(struct timer_list *); 1421 extern void afs_fs_probe_timer(struct timer_list *); 1422 extern void __net_exit afs_purge_servers(struct afs_net *); 1423 extern bool afs_check_server_record(struct afs_operation *, struct afs_server *); 1424 afs_inc_servers_outstanding(struct afs_net * net)1425 static inline void afs_inc_servers_outstanding(struct afs_net *net) 1426 { 1427 atomic_inc(&net->servers_outstanding); 1428 } 1429 afs_dec_servers_outstanding(struct afs_net * net)1430 static inline void afs_dec_servers_outstanding(struct afs_net *net) 1431 { 1432 if (atomic_dec_and_test(&net->servers_outstanding)) 1433 wake_up_var(&net->servers_outstanding); 1434 } 1435 afs_is_probing_server(struct afs_server * server)1436 static inline bool afs_is_probing_server(struct afs_server *server) 1437 { 1438 return list_empty(&server->probe_link); 1439 } 1440 1441 /* 1442 * server_list.c 1443 */ afs_get_serverlist(struct afs_server_list * slist)1444 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) 1445 { 1446 refcount_inc(&slist->usage); 1447 return slist; 1448 } 1449 1450 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); 1451 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, 1452 struct afs_vldb_entry *, 1453 u8); 1454 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); 1455 1456 /* 1457 * super.c 1458 */ 1459 extern int __init afs_fs_init(void); 1460 extern void afs_fs_exit(void); 1461 1462 /* 1463 * vlclient.c 1464 */ 1465 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, 1466 const char *, int); 1467 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); 1468 extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, 1469 struct key *, struct afs_vlserver *, unsigned int); 1470 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); 1471 extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); 1472 1473 /* 1474 * vl_alias.c 1475 */ 1476 extern int afs_cell_detect_alias(struct afs_cell *, struct key *); 1477 1478 /* 1479 * vl_probe.c 1480 */ 1481 extern void afs_vlserver_probe_result(struct afs_call *); 1482 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); 1483 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); 1484 1485 /* 1486 * vl_rotate.c 1487 */ 1488 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, 1489 struct afs_cell *, struct key *); 1490 extern bool afs_select_vlserver(struct afs_vl_cursor *); 1491 extern bool afs_select_current_vlserver(struct afs_vl_cursor *); 1492 extern int afs_end_vlserver_operation(struct afs_vl_cursor *); 1493 1494 /* 1495 * vlserver_list.c 1496 */ afs_get_vlserver(struct afs_vlserver * vlserver)1497 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) 1498 { 1499 refcount_inc(&vlserver->ref); 1500 return vlserver; 1501 } 1502 afs_get_vlserverlist(struct afs_vlserver_list * vllist)1503 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) 1504 { 1505 if (vllist) 1506 refcount_inc(&vllist->ref); 1507 return vllist; 1508 } 1509 1510 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); 1511 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); 1512 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); 1513 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); 1514 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, 1515 const void *, size_t); 1516 1517 /* 1518 * volume.c 1519 */ 1520 extern struct afs_volume *afs_create_volume(struct afs_fs_context *); 1521 extern int afs_activate_volume(struct afs_volume *); 1522 extern void afs_deactivate_volume(struct afs_volume *); 1523 bool afs_try_get_volume(struct afs_volume *volume, enum afs_volume_trace reason); 1524 extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); 1525 extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace); 1526 extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); 1527 1528 /* 1529 * write.c 1530 */ 1531 #ifdef CONFIG_AFS_FSCACHE 1532 bool afs_dirty_folio(struct address_space *, struct folio *); 1533 #else 1534 #define afs_dirty_folio filemap_dirty_folio 1535 #endif 1536 extern int afs_write_begin(struct file *file, struct address_space *mapping, 1537 loff_t pos, unsigned len, 1538 struct page **pagep, void **fsdata); 1539 extern int afs_write_end(struct file *file, struct address_space *mapping, 1540 loff_t pos, unsigned len, unsigned copied, 1541 struct page *page, void *fsdata); 1542 extern int afs_writepage(struct page *, struct writeback_control *); 1543 extern int afs_writepages(struct address_space *, struct writeback_control *); 1544 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); 1545 extern int afs_fsync(struct file *, loff_t, loff_t, int); 1546 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); 1547 extern void afs_prune_wb_keys(struct afs_vnode *); 1548 int afs_launder_folio(struct folio *); 1549 1550 /* 1551 * xattr.c 1552 */ 1553 extern const struct xattr_handler *afs_xattr_handlers[]; 1554 1555 /* 1556 * yfsclient.c 1557 */ 1558 extern void yfs_fs_fetch_data(struct afs_operation *); 1559 extern void yfs_fs_create_file(struct afs_operation *); 1560 extern void yfs_fs_make_dir(struct afs_operation *); 1561 extern void yfs_fs_remove_file2(struct afs_operation *); 1562 extern void yfs_fs_remove_file(struct afs_operation *); 1563 extern void yfs_fs_remove_dir(struct afs_operation *); 1564 extern void yfs_fs_link(struct afs_operation *); 1565 extern void yfs_fs_symlink(struct afs_operation *); 1566 extern void yfs_fs_rename(struct afs_operation *); 1567 extern void yfs_fs_store_data(struct afs_operation *); 1568 extern void yfs_fs_setattr(struct afs_operation *); 1569 extern void yfs_fs_get_volume_status(struct afs_operation *); 1570 extern void yfs_fs_set_lock(struct afs_operation *); 1571 extern void yfs_fs_extend_lock(struct afs_operation *); 1572 extern void yfs_fs_release_lock(struct afs_operation *); 1573 extern void yfs_fs_fetch_status(struct afs_operation *); 1574 extern void yfs_fs_inline_bulk_status(struct afs_operation *); 1575 1576 struct yfs_acl { 1577 struct afs_acl *acl; /* Dir/file/symlink ACL */ 1578 struct afs_acl *vol_acl; /* Whole volume ACL */ 1579 u32 inherit_flag; /* True if ACL is inherited from parent dir */ 1580 u32 num_cleaned; /* Number of ACEs removed due to subject removal */ 1581 unsigned int flags; 1582 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ 1583 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ 1584 }; 1585 1586 extern void yfs_free_opaque_acl(struct yfs_acl *); 1587 extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); 1588 extern void yfs_fs_store_opaque_acl2(struct afs_operation *); 1589 1590 /* 1591 * Miscellaneous inline functions. 1592 */ AFS_FS_I(struct inode * inode)1593 static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 1594 { 1595 return container_of(inode, struct afs_vnode, netfs.inode); 1596 } 1597 AFS_VNODE_TO_I(struct afs_vnode * vnode)1598 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 1599 { 1600 return &vnode->netfs.inode; 1601 } 1602 1603 /* 1604 * Note that a dentry got changed. We need to set d_fsdata to the data version 1605 * number derived from the result of the operation. It doesn't matter if 1606 * d_fsdata goes backwards as we'll just revalidate. 1607 */ afs_update_dentry_version(struct afs_operation * op,struct afs_vnode_param * dir_vp,struct dentry * dentry)1608 static inline void afs_update_dentry_version(struct afs_operation *op, 1609 struct afs_vnode_param *dir_vp, 1610 struct dentry *dentry) 1611 { 1612 if (!op->error) 1613 dentry->d_fsdata = 1614 (void *)(unsigned long)dir_vp->scb.status.data_version; 1615 } 1616 1617 /* 1618 * Set the file size and block count. Estimate the number of 512 bytes blocks 1619 * used, rounded up to nearest 1K for consistency with other AFS clients. 1620 */ afs_set_i_size(struct afs_vnode * vnode,u64 size)1621 static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size) 1622 { 1623 i_size_write(&vnode->netfs.inode, size); 1624 vnode->netfs.inode.i_blocks = ((size + 1023) >> 10) << 1; 1625 } 1626 1627 /* 1628 * Check for a conflicting operation on a directory that we just unlinked from. 1629 * If someone managed to sneak a link or an unlink in on the file we just 1630 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). 1631 */ afs_check_dir_conflict(struct afs_operation * op,struct afs_vnode_param * dvp)1632 static inline void afs_check_dir_conflict(struct afs_operation *op, 1633 struct afs_vnode_param *dvp) 1634 { 1635 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) 1636 op->flags |= AFS_OPERATION_DIR_CONFLICT; 1637 } 1638 afs_io_error(struct afs_call * call,enum afs_io_error where)1639 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) 1640 { 1641 trace_afs_io_error(call->debug_id, -EIO, where); 1642 return -EIO; 1643 } 1644 afs_bad(struct afs_vnode * vnode,enum afs_file_error where)1645 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) 1646 { 1647 trace_afs_file_error(vnode, -EIO, where); 1648 return -EIO; 1649 } 1650 1651 /*****************************************************************************/ 1652 /* 1653 * debug tracing 1654 */ 1655 extern unsigned afs_debug; 1656 1657 #define dbgprintk(FMT,...) \ 1658 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1659 1660 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1661 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1662 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1663 1664 1665 #if defined(__KDEBUG) 1666 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1667 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1668 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1669 1670 #elif defined(CONFIG_AFS_DEBUG) 1671 #define AFS_DEBUG_KENTER 0x01 1672 #define AFS_DEBUG_KLEAVE 0x02 1673 #define AFS_DEBUG_KDEBUG 0x04 1674 1675 #define _enter(FMT,...) \ 1676 do { \ 1677 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 1678 kenter(FMT,##__VA_ARGS__); \ 1679 } while (0) 1680 1681 #define _leave(FMT,...) \ 1682 do { \ 1683 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 1684 kleave(FMT,##__VA_ARGS__); \ 1685 } while (0) 1686 1687 #define _debug(FMT,...) \ 1688 do { \ 1689 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 1690 kdebug(FMT,##__VA_ARGS__); \ 1691 } while (0) 1692 1693 #else 1694 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1695 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1696 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1697 #endif 1698 1699 /* 1700 * debug assertion checking 1701 */ 1702 #if 1 // defined(__KDEBUGALL) 1703 1704 #define ASSERT(X) \ 1705 do { \ 1706 if (unlikely(!(X))) { \ 1707 printk(KERN_ERR "\n"); \ 1708 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1709 BUG(); \ 1710 } \ 1711 } while(0) 1712 1713 #define ASSERTCMP(X, OP, Y) \ 1714 do { \ 1715 if (unlikely(!((X) OP (Y)))) { \ 1716 printk(KERN_ERR "\n"); \ 1717 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1718 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1719 (unsigned long)(X), (unsigned long)(Y)); \ 1720 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1721 (unsigned long)(X), (unsigned long)(Y)); \ 1722 BUG(); \ 1723 } \ 1724 } while(0) 1725 1726 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1727 do { \ 1728 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 1729 printk(KERN_ERR "\n"); \ 1730 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1731 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 1732 (unsigned long)(L), (unsigned long)(N), \ 1733 (unsigned long)(H)); \ 1734 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 1735 (unsigned long)(L), (unsigned long)(N), \ 1736 (unsigned long)(H)); \ 1737 BUG(); \ 1738 } \ 1739 } while(0) 1740 1741 #define ASSERTIF(C, X) \ 1742 do { \ 1743 if (unlikely((C) && !(X))) { \ 1744 printk(KERN_ERR "\n"); \ 1745 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1746 BUG(); \ 1747 } \ 1748 } while(0) 1749 1750 #define ASSERTIFCMP(C, X, OP, Y) \ 1751 do { \ 1752 if (unlikely((C) && !((X) OP (Y)))) { \ 1753 printk(KERN_ERR "\n"); \ 1754 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1755 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1756 (unsigned long)(X), (unsigned long)(Y)); \ 1757 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1758 (unsigned long)(X), (unsigned long)(Y)); \ 1759 BUG(); \ 1760 } \ 1761 } while(0) 1762 1763 #else 1764 1765 #define ASSERT(X) \ 1766 do { \ 1767 } while(0) 1768 1769 #define ASSERTCMP(X, OP, Y) \ 1770 do { \ 1771 } while(0) 1772 1773 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1774 do { \ 1775 } while(0) 1776 1777 #define ASSERTIF(C, X) \ 1778 do { \ 1779 } while(0) 1780 1781 #define ASSERTIFCMP(C, X, OP, Y) \ 1782 do { \ 1783 } while(0) 1784 1785 #endif /* __KDEBUGALL */ 1786