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/filelock.h> 13 #include <linux/pagemap.h> 14 #include <linux/rxrpc.h> 15 #include <linux/key.h> 16 #include <linux/workqueue.h> 17 #include <linux/sched.h> 18 #include <linux/fscache.h> 19 #include <linux/backing-dev.h> 20 #include <linux/uuid.h> 21 #include <linux/mm_types.h> 22 #include <linux/dns_resolver.h> 23 #include <crypto/krb5.h> 24 #include <net/net_namespace.h> 25 #include <net/netns/generic.h> 26 #include <net/sock.h> 27 #include <net/af_rxrpc.h> 28 29 #include "afs.h" 30 #include "afs_vl.h" 31 32 #define AFS_CELL_MAX_ADDRS 15 33 34 struct pagevec; 35 struct afs_call; 36 struct afs_vnode; 37 struct afs_server_probe; 38 39 /* 40 * Partial file-locking emulation mode. (The problem being that AFS3 only 41 * allows whole-file locks and no upgrading/downgrading). 42 */ 43 enum afs_flock_mode { 44 afs_flock_mode_unset, 45 afs_flock_mode_local, /* Local locking only */ 46 afs_flock_mode_openafs, /* Don't get server lock for a partial lock */ 47 afs_flock_mode_strict, /* Always get a server lock for a partial lock */ 48 afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */ 49 }; 50 51 struct afs_fs_context { 52 bool force; /* T to force cell type */ 53 bool autocell; /* T if set auto mount operation */ 54 bool dyn_root; /* T if dynamic root */ 55 bool no_cell; /* T if the source is "none" (for dynroot) */ 56 enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */ 57 afs_voltype_t type; /* type of volume requested */ 58 unsigned int volnamesz; /* size of volume name */ 59 const char *volname; /* name of volume to mount */ 60 struct afs_net *net; /* the AFS net namespace stuff */ 61 struct afs_cell *cell; /* cell in which to find volume */ 62 struct afs_volume *volume; /* volume record */ 63 struct key *key; /* key to use for secure mounting */ 64 }; 65 66 enum afs_call_state { 67 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ 68 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ 69 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ 70 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ 71 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ 72 AFS_CALL_SV_REPLYING, /* Server: Replying */ 73 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ 74 AFS_CALL_COMPLETE, /* Completed or failed */ 75 }; 76 77 /* 78 * Address preferences. 79 */ 80 struct afs_addr_preference { 81 union { 82 struct in_addr ipv4_addr; /* AF_INET address to compare against */ 83 struct in6_addr ipv6_addr; /* AF_INET6 address to compare against */ 84 }; 85 sa_family_t family; /* Which address to use */ 86 u16 prio; /* Priority */ 87 u8 subnet_mask; /* How many bits to compare */ 88 }; 89 90 struct afs_addr_preference_list { 91 struct rcu_head rcu; 92 u16 version; /* Incremented when prefs list changes */ 93 u8 ipv6_off; /* Offset of IPv6 addresses */ 94 u8 nr; /* Number of addresses in total */ 95 u8 max_prefs; /* Number of prefs allocated */ 96 struct afs_addr_preference prefs[] __counted_by(max_prefs); 97 }; 98 99 struct afs_address { 100 struct rxrpc_peer *peer; 101 short last_error; /* Last error from this address */ 102 u16 prio; /* Address priority */ 103 }; 104 105 /* 106 * List of server addresses. 107 */ 108 struct afs_addr_list { 109 struct rcu_head rcu; 110 refcount_t usage; 111 u32 version; /* Version */ 112 unsigned int debug_id; 113 unsigned int addr_pref_version; /* Version of address preference list */ 114 unsigned char max_addrs; 115 unsigned char nr_addrs; 116 unsigned char preferred; /* Preferred address */ 117 unsigned char nr_ipv4; /* Number of IPv4 addresses */ 118 enum dns_record_source source:8; 119 enum dns_lookup_status status:8; 120 unsigned long probe_failed; /* Mask of addrs that failed locally/ICMP */ 121 unsigned long responded; /* Mask of addrs that responded */ 122 struct afs_address addrs[] __counted_by(max_addrs); 123 #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8)) 124 }; 125 126 /* 127 * a record of an in-progress RxRPC call 128 */ 129 struct afs_call { 130 const struct afs_call_type *type; /* type of call */ 131 wait_queue_head_t waitq; /* processes awaiting completion */ 132 struct work_struct async_work; /* async I/O processor */ 133 struct work_struct work; /* actual work processor */ 134 struct work_struct free_work; /* Deferred free processor */ 135 struct rxrpc_call *rxcall; /* RxRPC call handle */ 136 struct rxrpc_peer *peer; /* Remote endpoint */ 137 struct key *key; /* security for this call */ 138 struct afs_net *net; /* The network namespace */ 139 struct afs_server *server; /* The fileserver record if fs op (pins ref) */ 140 struct afs_vlserver *vlserver; /* The vlserver record if vl op */ 141 void *request; /* request data (first part) */ 142 size_t iov_len; /* Size of *iter to be used */ 143 struct iov_iter def_iter; /* Default buffer/data iterator */ 144 struct iov_iter *write_iter; /* Iterator defining write to be made */ 145 struct iov_iter *iter; /* Iterator currently in use */ 146 union { /* Convenience for ->def_iter */ 147 struct kvec kvec[1]; 148 struct bio_vec bvec[1]; 149 }; 150 void *buffer; /* reply receive buffer */ 151 union { 152 struct afs_endpoint_state *probe; 153 struct afs_addr_list *vl_probe; 154 struct afs_addr_list *ret_alist; 155 struct afs_vldb_entry *ret_vldb; 156 char *ret_str; 157 }; 158 struct afs_fid fid; /* Primary vnode ID (or all zeroes) */ 159 unsigned char probe_index; /* Address in ->probe_alist */ 160 struct afs_operation *op; 161 unsigned int server_index; 162 refcount_t ref; 163 enum afs_call_state state; 164 spinlock_t state_lock; 165 int error; /* error code */ 166 u32 abort_code; /* Remote abort ID or 0 */ 167 unsigned long long remaining; /* How much is left to receive */ 168 unsigned int max_lifespan; /* Maximum lifespan in secs to set if not 0 */ 169 unsigned request_size; /* size of request data */ 170 unsigned reply_max; /* maximum size of reply */ 171 unsigned count2; /* count used in unmarshalling */ 172 unsigned char unmarshall; /* unmarshalling phase */ 173 bool drop_ref; /* T if need to drop ref for incoming call */ 174 bool need_attention; /* T if RxRPC poked us */ 175 bool async; /* T if asynchronous */ 176 bool upgrade; /* T to request service upgrade */ 177 bool intr; /* T if interruptible */ 178 bool unmarshalling_error; /* T if an unmarshalling error occurred */ 179 bool responded; /* Got a response from the call (may be abort) */ 180 u8 security_ix; /* Security class */ 181 u16 service_id; /* Actual service ID (after upgrade) */ 182 unsigned int debug_id; /* Trace ID */ 183 u32 enctype; /* Security encoding type */ 184 u32 operation_ID; /* operation ID for an incoming call */ 185 u32 count; /* count for use in unmarshalling */ 186 union { /* place to extract temporary data */ 187 struct { 188 __be32 tmp_u; 189 __be32 tmp; 190 } __attribute__((packed)); 191 __be64 tmp64; 192 }; 193 ktime_t issue_time; /* Time of issue of operation */ 194 }; 195 196 struct afs_call_type { 197 const char *name; 198 unsigned int op; /* Really enum afs_fs_operation */ 199 200 /* deliver request or reply data to an call 201 * - returning an error will cause the call to be aborted 202 */ 203 int (*deliver)(struct afs_call *call); 204 205 /* clean up a call */ 206 void (*destructor)(struct afs_call *call); 207 208 /* Async receive processing function */ 209 void (*async_rx)(struct work_struct *work); 210 211 /* Work function */ 212 void (*work)(struct work_struct *work); 213 214 /* Call done function (gets called immediately on success or failure) */ 215 void (*done)(struct afs_call *call); 216 217 /* Handle a call being immediately cancelled. */ 218 void (*immediate_cancel)(struct afs_call *call); 219 }; 220 221 /* 222 * Key available for writeback on a file. 223 */ 224 struct afs_wb_key { 225 refcount_t usage; 226 struct key *key; 227 struct list_head vnode_link; /* Link in vnode->wb_keys */ 228 }; 229 230 /* 231 * AFS open file information record. Pointed to by file->private_data. 232 */ 233 struct afs_file { 234 struct key *key; /* The key this file was opened with */ 235 struct afs_wb_key *wb; /* Writeback key record for this file */ 236 }; 237 238 static inline struct key *afs_file_key(struct file *file) 239 { 240 struct afs_file *af = file->private_data; 241 242 return af->key; 243 } 244 245 /* 246 * AFS superblock private data 247 * - there's one superblock per volume 248 */ 249 struct afs_super_info { 250 struct net *net_ns; /* Network namespace */ 251 struct afs_cell *cell; /* The cell in which the volume resides */ 252 struct afs_volume *volume; /* volume record */ 253 enum afs_flock_mode flock_mode:8; /* File locking emulation mode */ 254 bool dyn_root; /* True if dynamic root */ 255 }; 256 257 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) 258 { 259 return sb->s_fs_info; 260 } 261 262 extern struct file_system_type afs_fs_type; 263 264 /* 265 * Set of substitutes for @sys. 266 */ 267 struct afs_sysnames { 268 #define AFS_NR_SYSNAME 16 269 char *subs[AFS_NR_SYSNAME]; 270 refcount_t usage; 271 unsigned short nr; 272 char blank[1]; 273 }; 274 275 /* 276 * AFS network namespace record. 277 */ 278 struct afs_net { 279 struct net *net; /* Backpointer to the owning net namespace */ 280 struct afs_uuid uuid; 281 bool live; /* F if this namespace is being removed */ 282 283 /* AF_RXRPC I/O stuff */ 284 struct socket *socket; 285 struct afs_call *spare_incoming_call; 286 struct work_struct charge_preallocation_work; 287 struct work_struct rx_oob_work; 288 struct mutex socket_mutex; 289 atomic_t nr_outstanding_calls; 290 atomic_t nr_superblocks; 291 292 /* Cell database */ 293 struct rb_root cells; 294 struct idr cells_dyn_ino; /* cell->dynroot_ino mapping */ 295 struct afs_cell __rcu *ws_cell; 296 atomic_t cells_outstanding; 297 struct rw_semaphore cells_lock; 298 struct mutex cells_alias_lock; 299 300 struct mutex proc_cells_lock; 301 struct hlist_head proc_cells; 302 303 /* Known servers. Theoretically each fileserver can only be in one 304 * cell, but in practice, people create aliases and subsets and there's 305 * no easy way to distinguish them. 306 */ 307 seqlock_t fs_lock; /* For fs_probe_*, fs_proc */ 308 struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */ 309 struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */ 310 struct hlist_head fs_proc; /* procfs servers list */ 311 312 struct key *fs_cm_token_key; /* Key for creating CM tokens */ 313 struct work_struct fs_prober; 314 struct timer_list fs_probe_timer; 315 atomic_t servers_outstanding; 316 317 /* File locking renewal management */ 318 struct mutex lock_manager_mutex; 319 320 /* Misc */ 321 struct super_block *dynroot_sb; /* Dynamic root mount superblock */ 322 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ 323 struct afs_sysnames *sysnames; 324 rwlock_t sysnames_lock; 325 struct afs_addr_preference_list __rcu *address_prefs; 326 u16 address_pref_version; 327 328 /* Statistics counters */ 329 atomic_t n_lookup; /* Number of lookups done */ 330 atomic_t n_reval; /* Number of dentries needing revalidation */ 331 atomic_t n_inval; /* Number of invalidations by the server */ 332 atomic_t n_relpg; /* Number of invalidations by release_folio */ 333 atomic_t n_read_dir; /* Number of directory pages read */ 334 atomic_t n_dir_cr; /* Number of directory entry creation edits */ 335 atomic_t n_dir_rm; /* Number of directory entry removal edits */ 336 atomic_t n_stores; /* Number of store ops */ 337 atomic_long_t n_store_bytes; /* Number of bytes stored */ 338 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ 339 atomic_t n_fetches; /* Number of data fetch ops */ 340 }; 341 342 extern const char afs_init_sysname[]; 343 344 enum afs_cell_state { 345 AFS_CELL_SETTING_UP, 346 AFS_CELL_ACTIVE, 347 AFS_CELL_REMOVING, 348 AFS_CELL_DEAD, 349 }; 350 351 /* 352 * AFS cell record. 353 * 354 * This is a tricky concept to get right as it is possible to create aliases 355 * simply by pointing AFSDB/SRV records for two names at the same set of VL 356 * servers; it is also possible to do things like setting up two sets of VL 357 * servers, one of which provides a superset of the volumes provided by the 358 * other (for internal/external division, for example). 359 * 360 * Cells only exist in the sense that (a) a cell's name maps to a set of VL 361 * servers and (b) a cell's name is used by the client to select the key to use 362 * for authentication and encryption. The cell name is not typically used in 363 * the protocol. 364 * 365 * Two cells are determined to be aliases if they have an explicit alias (YFS 366 * only), share any VL servers in common or have at least one volume in common. 367 * "In common" means that the address list of the VL servers or the fileservers 368 * share at least one endpoint. 369 */ 370 struct afs_cell { 371 union { 372 struct rcu_head rcu; 373 struct rb_node net_node; /* Node in net->cells */ 374 }; 375 struct afs_net *net; 376 struct afs_cell *alias_of; /* The cell this is an alias of */ 377 struct afs_volume *root_volume; /* The root.cell volume if there is one */ 378 struct key *anonymous_key; /* anonymous user key for this cell */ 379 struct work_struct destroyer; /* Destroyer for cell */ 380 struct work_struct manager; /* Manager for init/deinit/dns */ 381 struct timer_list management_timer; /* General management timer */ 382 struct hlist_node proc_link; /* /proc cell list link */ 383 time64_t dns_expiry; /* Time AFSDB/SRV record expires */ 384 time64_t last_inactive; /* Time of last drop of usage count */ 385 refcount_t ref; /* Struct refcount */ 386 atomic_t active; /* Active usage counter */ 387 unsigned long flags; 388 #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */ 389 #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */ 390 #define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */ 391 enum afs_cell_state state; 392 short error; 393 enum dns_record_source dns_source:8; /* Latest source of data from lookup */ 394 enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */ 395 unsigned int dns_lookup_count; /* Counter of DNS lookups */ 396 unsigned int debug_id; 397 unsigned int dynroot_ino; /* Inode numbers for dynroot (a pair) */ 398 399 /* The volumes belonging to this cell */ 400 struct rw_semaphore vs_lock; /* Lock for server->volumes */ 401 struct rb_root volumes; /* Tree of volumes on this server */ 402 struct hlist_head proc_volumes; /* procfs volume list */ 403 seqlock_t volume_lock; /* For volumes */ 404 405 /* Active fileserver interaction state. */ 406 struct rb_root fs_servers; /* afs_server (by server UUID) */ 407 struct rw_semaphore fs_lock; /* For fs_servers */ 408 409 /* VL server list. */ 410 rwlock_t vl_servers_lock; /* Lock on vl_servers */ 411 struct afs_vlserver_list __rcu *vl_servers; 412 413 u8 name_len; /* Length of name */ 414 char *name; /* Cell name, case-flattened and NUL-padded */ 415 }; 416 417 /* 418 * Volume Location server record. 419 */ 420 struct afs_vlserver { 421 struct rcu_head rcu; 422 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */ 423 unsigned long flags; 424 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ 425 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ 426 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ 427 #define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */ 428 rwlock_t lock; /* Lock on addresses */ 429 refcount_t ref; 430 unsigned int rtt; /* Server's current RTT in uS */ 431 unsigned int debug_id; 432 433 /* Probe state */ 434 wait_queue_head_t probe_wq; 435 atomic_t probe_outstanding; 436 spinlock_t probe_lock; 437 struct { 438 unsigned int rtt; /* Best RTT in uS (or UINT_MAX) */ 439 u32 abort_code; 440 short error; 441 unsigned short flags; 442 #define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */ 443 #define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */ 444 #define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */ 445 #define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */ 446 } probe; 447 448 u16 service_id; /* Service ID we're using */ 449 u16 port; 450 u16 name_len; /* Length of name */ 451 char name[]; /* Server name, case-flattened */ 452 }; 453 454 /* 455 * Weighted list of Volume Location servers. 456 */ 457 struct afs_vlserver_entry { 458 u16 priority; /* Preference (as SRV) */ 459 u16 weight; /* Weight (as SRV) */ 460 enum dns_record_source source:8; 461 enum dns_lookup_status status:8; 462 struct afs_vlserver *server; 463 }; 464 465 struct afs_vlserver_list { 466 struct rcu_head rcu; 467 refcount_t ref; 468 u8 nr_servers; 469 u8 index; /* Server currently in use */ 470 u8 preferred; /* Preferred server */ 471 enum dns_record_source source:8; 472 enum dns_lookup_status status:8; 473 rwlock_t lock; 474 struct afs_vlserver_entry servers[]; 475 }; 476 477 /* 478 * Cached VLDB entry. 479 * 480 * This is pointed to by cell->vldb_entries, indexed by name. 481 */ 482 struct afs_vldb_entry { 483 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ 484 485 unsigned long flags; 486 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ 487 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ 488 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ 489 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ 490 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ 491 492 uuid_t fs_server[AFS_NMAXNSERVERS]; 493 u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */ 494 u8 fs_mask[AFS_NMAXNSERVERS]; 495 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 496 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 497 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 498 u8 vlsf_flags[AFS_NMAXNSERVERS]; 499 short error; 500 u8 nr_servers; /* Number of server records */ 501 u8 name_len; 502 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 503 }; 504 505 /* 506 * Fileserver endpoint state. The records the addresses of a fileserver's 507 * endpoints and the state and result of a round of probing on them. This 508 * allows the rotation algorithm to access those results without them being 509 * erased by a subsequent round of probing. 510 */ 511 struct afs_endpoint_state { 512 struct rcu_head rcu; 513 struct afs_addr_list *addresses; /* The addresses being probed */ 514 unsigned long responsive_set; /* Bitset of responsive endpoints */ 515 unsigned long failed_set; /* Bitset of endpoints we failed to probe */ 516 refcount_t ref; 517 unsigned int server_id; /* Debug ID of server */ 518 unsigned int probe_seq; /* Probe sequence (from server::probe_counter) */ 519 atomic_t nr_probing; /* Number of outstanding probes */ 520 unsigned int rtt; /* Best RTT in uS (or UINT_MAX) */ 521 s32 abort_code; 522 short error; 523 unsigned long flags; 524 #define AFS_ESTATE_RESPONDED 0 /* Set if the server responded */ 525 #define AFS_ESTATE_SUPERSEDED 1 /* Set if this record has been superseded */ 526 #define AFS_ESTATE_IS_YFS 2 /* Set if probe upgraded to YFS */ 527 #define AFS_ESTATE_NOT_YFS 3 /* Set if probe didn't upgrade to YFS */ 528 #define AFS_ESTATE_LOCAL_FAILURE 4 /* Set if there was a local failure (eg. ENOMEM) */ 529 }; 530 531 /* 532 * Record of fileserver with which we're actively communicating. 533 */ 534 struct afs_server { 535 struct rcu_head rcu; 536 union { 537 uuid_t uuid; /* Server ID */ 538 struct afs_uuid _uuid; 539 }; 540 541 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 542 struct rb_node uuid_rb; /* Link in cell->fs_servers */ 543 struct list_head probe_link; /* Link in net->fs_probe_* */ 544 struct hlist_node proc_link; /* Link in net->fs_proc */ 545 struct list_head volumes; /* RCU list of afs_server_entry objects */ 546 struct work_struct destroyer; /* Work item to try and destroy a server */ 547 struct timer_list timer; /* Management timer */ 548 struct mutex cm_token_lock; /* Lock governing creation of appdata */ 549 struct krb5_buffer cm_rxgk_appdata; /* Appdata to be included in RESPONSE packet */ 550 time64_t unuse_time; /* Time at which last unused */ 551 unsigned long flags; 552 #define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */ 553 #define AFS_SERVER_FL_UPDATING 1 554 #define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */ 555 #define AFS_SERVER_FL_UNCREATED 3 /* The record needs creating */ 556 #define AFS_SERVER_FL_CREATING 4 /* The record is being created */ 557 #define AFS_SERVER_FL_EXPIRED 5 /* The record has expired */ 558 #define AFS_SERVER_FL_NOT_FOUND 6 /* VL server says no such server */ 559 #define AFS_SERVER_FL_VL_FAIL 7 /* Failed to access VL server */ 560 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ 561 #define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */ 562 #define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */ 563 #define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */ 564 #define AFS_SERVER_FL_HAS_FS64 19 /* Fileserver supports FS.{Fetch,Store}Data64 */ 565 #define AFS_SERVER_FL_NO_RENAME2 20 /* YFS Fileserver doesn't support enhanced rename */ 566 refcount_t ref; /* Object refcount */ 567 atomic_t active; /* Active user count */ 568 u32 addr_version; /* Address list version */ 569 u16 service_id; /* Service ID we're using. */ 570 short create_error; /* Creation error */ 571 unsigned int rtt; /* Server's current RTT in uS */ 572 unsigned int debug_id; /* Debugging ID for traces */ 573 574 /* file service access */ 575 rwlock_t fs_lock; /* access lock */ 576 577 /* Probe state */ 578 struct afs_endpoint_state __rcu *endpoint_state; /* Latest endpoint/probe state */ 579 unsigned long probed_at; /* Time last probe was dispatched (jiffies) */ 580 wait_queue_head_t probe_wq; 581 unsigned int probe_counter; /* Number of probes issued */ 582 spinlock_t probe_lock; 583 }; 584 585 enum afs_ro_replicating { 586 AFS_RO_NOT_REPLICATING, /* Not doing replication */ 587 AFS_RO_REPLICATING_USE_OLD, /* Replicating; use old version */ 588 AFS_RO_REPLICATING_USE_NEW, /* Replicating; switch to new version */ 589 } __mode(byte); 590 591 /* 592 * Replaceable volume server list. 593 */ 594 struct afs_server_entry { 595 struct afs_server *server; 596 struct afs_volume *volume; 597 struct list_head slink; /* Link in server->volumes */ 598 time64_t cb_expires_at; /* Time at which volume-level callback expires */ 599 unsigned long flags; 600 #define AFS_SE_EXCLUDED 0 /* Set if server is to be excluded in rotation */ 601 #define AFS_SE_VOLUME_OFFLINE 1 /* Set if volume offline notice given */ 602 #define AFS_SE_VOLUME_BUSY 2 /* Set if volume busy notice given */ 603 }; 604 605 struct afs_server_list { 606 struct rcu_head rcu; 607 refcount_t usage; 608 bool attached; /* T if attached to servers */ 609 enum afs_ro_replicating ro_replicating; /* RW->RO update (probably) in progress */ 610 unsigned char nr_servers; 611 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ 612 unsigned int seq; /* Set to ->servers_seq when installed */ 613 rwlock_t lock; 614 struct afs_server_entry servers[]; 615 }; 616 617 /* 618 * Live AFS volume management. 619 */ 620 struct afs_volume { 621 struct rcu_head rcu; 622 afs_volid_t vid; /* The volume ID of this volume */ 623 afs_volid_t vids[AFS_MAXTYPES]; /* All associated volume IDs */ 624 refcount_t ref; 625 unsigned int debug_id; /* Debugging ID for traces */ 626 time64_t update_at; /* Time at which to next update */ 627 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 628 struct rb_node cell_node; /* Link in cell->volumes */ 629 struct hlist_node proc_link; /* Link in cell->proc_volumes */ 630 struct super_block __rcu *sb; /* Superblock on which inodes reside */ 631 struct work_struct destructor; /* Deferred destructor */ 632 unsigned long flags; 633 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ 634 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ 635 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ 636 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ 637 #define AFS_VOLUME_MAYBE_NO_IBULK 4 /* - T if some servers don't have InlineBulkStatus */ 638 #define AFS_VOLUME_RM_TREE 5 /* - Set if volume removed from cell->volumes */ 639 #ifdef CONFIG_AFS_FSCACHE 640 struct fscache_volume *cache; /* Caching cookie */ 641 #endif 642 struct afs_server_list __rcu *servers; /* List of servers on which volume resides */ 643 rwlock_t servers_lock; /* Lock for ->servers */ 644 unsigned int servers_seq; /* Incremented each time ->servers changes */ 645 646 /* RO release tracking */ 647 struct mutex volsync_lock; /* Time/state evaluation lock */ 648 time64_t creation_time; /* Volume creation time (or TIME64_MIN) */ 649 time64_t update_time; /* Volume update time (or TIME64_MIN) */ 650 651 /* Callback management */ 652 struct mutex cb_check_lock; /* Lock to control race to check after v_break */ 653 time64_t cb_expires_at; /* Earliest volume callback expiry time */ 654 atomic_t cb_ro_snapshot; /* RO volume update-from-snapshot counter */ 655 atomic_t cb_v_break; /* Volume-break event counter. */ 656 atomic_t cb_v_check; /* Volume-break has-been-checked counter. */ 657 atomic_t cb_scrub; /* Scrub-all-data event counter. */ 658 rwlock_t cb_v_break_lock; 659 struct rw_semaphore open_mmaps_lock; 660 struct list_head open_mmaps; /* List of vnodes that are mmapped */ 661 662 afs_voltype_t type; /* type of volume */ 663 char type_force; /* force volume type (suppress R/O -> R/W) */ 664 u8 name_len; 665 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 666 }; 667 668 enum afs_lock_state { 669 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ 670 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ 671 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ 672 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ 673 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ 674 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ 675 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ 676 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */ 677 }; 678 679 /* 680 * AFS inode private data. 681 * 682 * Note that afs_alloc_inode() *must* reset anything that could incorrectly 683 * leak from one inode to another. 684 */ 685 struct afs_vnode { 686 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 687 struct afs_volume *volume; /* volume on which vnode resides */ 688 struct afs_fid fid; /* the file identifier for this inode */ 689 struct afs_file_status status; /* AFS status info for this file */ 690 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ 691 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ 692 struct list_head io_lock_waiters; /* Threads waiting for the I/O lock */ 693 struct rw_semaphore validate_lock; /* lock for validating this vnode */ 694 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ 695 struct key *silly_key; /* Silly rename key */ 696 spinlock_t wb_lock; /* lock for wb_keys */ 697 spinlock_t lock; /* waitqueue/flags lock */ 698 unsigned long flags; 699 #define AFS_VNODE_IO_LOCK 0 /* Set if the I/O serialisation lock is held */ 700 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 701 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ 702 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 703 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 704 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 705 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ 706 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ 707 #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */ 708 #define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */ 709 #define AFS_VNODE_DIR_READ 11 /* Set if we've read a dir's contents */ 710 711 struct folio_queue *directory; /* Directory contents */ 712 struct list_head wb_keys; /* List of keys available for writeback */ 713 struct list_head pending_locks; /* locks waiting to be granted */ 714 struct list_head granted_locks; /* locks granted on this file */ 715 struct delayed_work lock_work; /* work to be done in locking */ 716 struct key *lock_key; /* Key to be used in lock ops */ 717 ktime_t locked_at; /* Time at which lock obtained */ 718 enum afs_lock_state lock_state : 8; 719 afs_lock_type_t lock_type : 8; 720 unsigned int directory_size; /* Amount of space in ->directory */ 721 722 /* outstanding callback notification on this file */ 723 struct work_struct cb_work; /* Work for mmap'd files */ 724 struct list_head cb_mmap_link; /* Link in cell->fs_open_mmaps */ 725 void *cb_server; /* Server with callback/filelock */ 726 atomic_t cb_nr_mmap; /* Number of mmaps */ 727 unsigned int cb_ro_snapshot; /* RO volume release counter on ->volume */ 728 unsigned int cb_scrub; /* Scrub counter on ->volume */ 729 unsigned int cb_break; /* Break counter on vnode */ 730 unsigned int cb_v_check; /* Break check counter on ->volume */ 731 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ 732 733 atomic64_t cb_expires_at; /* time at which callback expires */ 734 #define AFS_NO_CB_PROMISE TIME64_MIN 735 }; 736 737 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) 738 { 739 #ifdef CONFIG_AFS_FSCACHE 740 return netfs_i_cookie(&vnode->netfs); 741 #else 742 return NULL; 743 #endif 744 } 745 746 static inline void afs_vnode_set_cache(struct afs_vnode *vnode, 747 struct fscache_cookie *cookie) 748 { 749 #ifdef CONFIG_AFS_FSCACHE 750 vnode->netfs.cache = cookie; 751 if (cookie) 752 mapping_set_release_always(vnode->netfs.inode.i_mapping); 753 #endif 754 } 755 756 /* 757 * cached security record for one user's attempt to access a vnode 758 */ 759 struct afs_permit { 760 struct key *key; /* RxRPC ticket holding a security context */ 761 afs_access_t access; /* CallerAccess value for this key */ 762 }; 763 764 /* 765 * Immutable cache of CallerAccess records from attempts to access vnodes. 766 * These may be shared between multiple vnodes. 767 */ 768 struct afs_permits { 769 struct rcu_head rcu; 770 struct hlist_node hash_node; /* Link in hash */ 771 unsigned long h; /* Hash value for this permit list */ 772 refcount_t usage; 773 unsigned short nr_permits; /* Number of records */ 774 bool invalidated; /* Invalidated due to key change */ 775 struct afs_permit permits[] __counted_by(nr_permits); /* List of permits sorted by key pointer */ 776 }; 777 778 /* 779 * Error prioritisation and accumulation. 780 */ 781 struct afs_error { 782 s32 abort_code; /* Cumulative abort code */ 783 short error; /* Cumulative error */ 784 bool responded; /* T if server responded */ 785 bool aborted; /* T if ->error is from an abort */ 786 }; 787 788 /* 789 * Cursor for iterating over a set of volume location servers. 790 */ 791 struct afs_vl_cursor { 792 struct afs_cell *cell; /* The cell we're querying */ 793 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ 794 struct afs_vlserver *server; /* Server on which this resides */ 795 struct afs_addr_list *alist; /* Current address list (pins ref) */ 796 struct key *key; /* Key for the server */ 797 unsigned long untried_servers; /* Bitmask of untried servers */ 798 unsigned long addr_tried; /* Tried addresses */ 799 struct afs_error cumul_error; /* Cumulative error */ 800 unsigned int debug_id; 801 s32 call_abort_code; 802 short call_error; /* Error from single call */ 803 short server_index; /* Current server */ 804 signed char addr_index; /* Current address */ 805 unsigned short flags; 806 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ 807 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ 808 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ 809 short nr_iterations; /* Number of server iterations */ 810 bool call_responded; /* T if the current address responded */ 811 }; 812 813 /* 814 * Fileserver state tracking for an operation. An array of these is kept, 815 * indexed by server index. 816 */ 817 struct afs_server_state { 818 /* Tracking of fileserver probe state. Other operations may interfere 819 * by probing a fileserver when accessing other volumes. 820 */ 821 unsigned int probe_seq; 822 unsigned long untried_addrs; /* Addresses we haven't tried yet */ 823 struct wait_queue_entry probe_waiter; 824 struct afs_endpoint_state *endpoint_state; /* Endpoint state being monitored */ 825 }; 826 827 /* 828 * Fileserver operation methods. 829 */ 830 struct afs_operation_ops { 831 void (*issue_afs_rpc)(struct afs_operation *op); 832 void (*issue_yfs_rpc)(struct afs_operation *op); 833 void (*success)(struct afs_operation *op); 834 void (*aborted)(struct afs_operation *op); 835 void (*failed)(struct afs_operation *op); 836 void (*edit_dir)(struct afs_operation *op); 837 void (*put)(struct afs_operation *op); 838 }; 839 840 struct afs_vnode_param { 841 struct afs_vnode *vnode; 842 struct afs_fid fid; /* Fid to access */ 843 struct afs_status_cb scb; /* Returned status and callback promise */ 844 afs_dataversion_t dv_before; /* Data version before the call */ 845 unsigned int cb_break_before; /* cb_break before the call */ 846 u8 dv_delta; /* Expected change in data version */ 847 bool put_vnode:1; /* T if we have a ref on the vnode */ 848 bool need_io_lock:1; /* T if we need the I/O lock on this */ 849 bool update_ctime:1; /* Need to update the ctime */ 850 bool set_size:1; /* Must update i_size */ 851 bool op_unlinked:1; /* True if file was unlinked by op */ 852 bool speculative:1; /* T if speculative status fetch (no vnode lock) */ 853 bool modification:1; /* Set if the content gets modified */ 854 }; 855 856 /* 857 * Fileserver operation wrapper, handling server and address rotation 858 * asynchronously. May make simultaneous calls to multiple servers. 859 */ 860 struct afs_operation { 861 struct afs_net *net; /* Network namespace */ 862 struct key *key; /* Key for the cell */ 863 const struct afs_call_type *type; /* Type of call done */ 864 const struct afs_operation_ops *ops; 865 866 /* Parameters/results for the operation */ 867 struct afs_volume *volume; /* Volume being accessed */ 868 struct afs_vnode_param file[2]; 869 struct afs_vnode_param *more_files; 870 struct afs_volsync pre_volsync; /* Volsync before op */ 871 struct afs_volsync volsync; /* Volsync returned by op */ 872 struct dentry *dentry; /* Dentry to be altered */ 873 struct dentry *dentry_2; /* Second dentry to be altered */ 874 struct timespec64 mtime; /* Modification time to record */ 875 struct timespec64 ctime; /* Change time to set */ 876 struct afs_error cumul_error; /* Cumulative error */ 877 short nr_files; /* Number of entries in file[], more_files */ 878 unsigned int debug_id; 879 880 unsigned int cb_v_break; /* Volume break counter before op */ 881 882 union { 883 struct { 884 int which; /* Which ->file[] to fetch for */ 885 } fetch_status; 886 struct { 887 int reason; /* enum afs_edit_dir_reason */ 888 mode_t mode; 889 const char *symlink; 890 } create; 891 struct { 892 bool need_rehash; 893 } unlink; 894 struct { 895 struct dentry *rehash; 896 struct dentry *tmp; 897 unsigned int rename_flags; 898 bool new_negative; 899 } rename; 900 struct { 901 struct netfs_io_subrequest *subreq; 902 } fetch; 903 struct { 904 afs_lock_type_t type; 905 } lock; 906 struct { 907 struct iov_iter *write_iter; 908 loff_t pos; 909 loff_t size; 910 loff_t i_size; 911 } store; 912 struct { 913 struct iattr *attr; 914 loff_t old_i_size; 915 } setattr; 916 struct afs_acl *acl; 917 struct yfs_acl *yacl; 918 struct { 919 struct afs_volume_status vs; 920 struct kstatfs *buf; 921 } volstatus; 922 }; 923 924 /* Fileserver iteration state */ 925 struct afs_server_list *server_list; /* Current server list (pins ref) */ 926 struct afs_server *server; /* Server we're using (ref pinned by server_list) */ 927 struct afs_endpoint_state *estate; /* Current endpoint state (doesn't pin ref) */ 928 struct afs_server_state *server_states; /* States of the servers involved */ 929 struct afs_call *call; 930 unsigned long untried_servers; /* Bitmask of untried servers */ 931 unsigned long addr_tried; /* Tried addresses */ 932 s32 call_abort_code; /* Abort code from single call */ 933 short call_error; /* Error from single call */ 934 short server_index; /* Current server */ 935 short nr_iterations; /* Number of server iterations */ 936 signed char addr_index; /* Current address */ 937 bool call_responded; /* T if the current address responded */ 938 939 unsigned int flags; 940 #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ 941 #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ 942 #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ 943 #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ 944 #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ 945 #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ 946 #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ 947 #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ 948 #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ 949 #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ 950 #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ 951 #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ 952 #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ 953 #define AFS_OPERATION_ASYNC 0x2000 /* Set if should run asynchronously */ 954 }; 955 956 /* 957 * Cache auxiliary data. 958 */ 959 struct afs_vnode_cache_aux { 960 __be64 data_version; 961 } __packed; 962 963 static inline void afs_set_cache_aux(struct afs_vnode *vnode, 964 struct afs_vnode_cache_aux *aux) 965 { 966 aux->data_version = cpu_to_be64(vnode->status.data_version); 967 } 968 969 static inline void afs_invalidate_cache(struct afs_vnode *vnode, unsigned int flags) 970 { 971 struct afs_vnode_cache_aux aux; 972 973 afs_set_cache_aux(vnode, &aux); 974 fscache_invalidate(afs_vnode_cache(vnode), &aux, 975 i_size_read(&vnode->netfs.inode), flags); 976 } 977 978 /* 979 * Directory iteration management. 980 */ 981 struct afs_dir_iter { 982 struct afs_vnode *dvnode; 983 union afs_xdr_dir_block *block; 984 struct folio_queue *fq; 985 unsigned int fpos; 986 int fq_slot; 987 unsigned int loop_check; 988 u8 nr_slots; 989 u8 bucket; 990 unsigned int prev_entry; 991 }; 992 993 #include <trace/events/afs.h> 994 995 /*****************************************************************************/ 996 /* 997 * addr_list.c 998 */ 999 struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist, enum afs_alist_trace reason); 1000 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int nr); 1001 extern void afs_put_addrlist(struct afs_addr_list *alist, enum afs_alist_trace reason); 1002 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, 1003 const char *, size_t, char, 1004 unsigned short, unsigned short); 1005 bool afs_addr_list_same(const struct afs_addr_list *a, 1006 const struct afs_addr_list *b); 1007 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); 1008 1009 extern int afs_merge_fs_addr4(struct afs_net *net, struct afs_addr_list *addr, 1010 __be32 xdr, u16 port); 1011 extern int afs_merge_fs_addr6(struct afs_net *net, struct afs_addr_list *addr, 1012 __be32 *xdr, u16 port); 1013 void afs_set_peer_appdata(struct afs_server *server, 1014 struct afs_addr_list *old_alist, 1015 struct afs_addr_list *new_alist); 1016 1017 /* 1018 * addr_prefs.c 1019 */ 1020 int afs_proc_addr_prefs_write(struct file *file, char *buf, size_t size); 1021 void afs_get_address_preferences_rcu(struct afs_net *net, struct afs_addr_list *alist); 1022 void afs_get_address_preferences(struct afs_net *net, struct afs_addr_list *alist); 1023 1024 /* 1025 * callback.c 1026 */ 1027 extern void afs_invalidate_mmap_work(struct work_struct *); 1028 extern void afs_init_callback_state(struct afs_server *); 1029 extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 1030 extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 1031 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); 1032 1033 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) 1034 { 1035 return vnode->cb_break + vnode->cb_ro_snapshot + vnode->cb_scrub; 1036 } 1037 1038 static inline bool afs_cb_is_broken(unsigned int cb_break, 1039 const struct afs_vnode *vnode) 1040 { 1041 return cb_break != (vnode->cb_break + 1042 atomic_read(&vnode->volume->cb_ro_snapshot) + 1043 atomic_read(&vnode->volume->cb_scrub)); 1044 } 1045 1046 /* 1047 * cell.c 1048 */ 1049 extern int afs_cell_init(struct afs_net *, const char *); 1050 extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, 1051 enum afs_cell_trace); 1052 struct afs_cell *afs_lookup_cell(struct afs_net *net, 1053 const char *name, unsigned int namesz, 1054 const char *vllist, bool excl, 1055 enum afs_cell_trace trace); 1056 extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); 1057 void afs_unuse_cell(struct afs_cell *cell, enum afs_cell_trace reason); 1058 extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); 1059 extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); 1060 extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); 1061 extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); 1062 void afs_set_cell_timer(struct afs_cell *cell, unsigned int delay_secs); 1063 extern void __net_exit afs_cell_purge(struct afs_net *); 1064 1065 /* 1066 * cmservice.c 1067 */ 1068 extern bool afs_cm_incoming_call(struct afs_call *); 1069 1070 /* 1071 * cm_security.c 1072 */ 1073 void afs_process_oob_queue(struct work_struct *work); 1074 #ifdef CONFIG_RXGK 1075 int afs_create_token_key(struct afs_net *net, struct socket *socket); 1076 #else 1077 static inline int afs_create_token_key(struct afs_net *net, struct socket *socket) 1078 { 1079 return 0; 1080 } 1081 #endif 1082 1083 /* 1084 * dir.c 1085 */ 1086 extern const struct file_operations afs_dir_file_operations; 1087 extern const struct inode_operations afs_dir_inode_operations; 1088 extern const struct address_space_operations afs_dir_aops; 1089 extern const struct dentry_operations afs_fs_dentry_operations; 1090 1091 ssize_t afs_read_single(struct afs_vnode *dvnode, struct file *file); 1092 ssize_t afs_read_dir(struct afs_vnode *dvnode, struct file *file) 1093 __acquires(&dvnode->validate_lock); 1094 extern void afs_d_release(struct dentry *); 1095 extern void afs_check_for_remote_deletion(struct afs_operation *); 1096 int afs_single_writepages(struct address_space *mapping, 1097 struct writeback_control *wbc); 1098 1099 /* 1100 * dir_edit.c 1101 */ 1102 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, 1103 enum afs_edit_dir_reason); 1104 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); 1105 void afs_edit_dir_update(struct afs_vnode *vnode, const struct qstr *name, 1106 struct afs_vnode *new_dvnode, enum afs_edit_dir_reason why); 1107 void afs_mkdir_init_dir(struct afs_vnode *dvnode, struct afs_vnode *parent_vnode); 1108 1109 /* 1110 * dir_search.c 1111 */ 1112 unsigned int afs_dir_hash_name(const struct qstr *name); 1113 bool afs_dir_init_iter(struct afs_dir_iter *iter, const struct qstr *name); 1114 union afs_xdr_dir_block *afs_dir_find_block(struct afs_dir_iter *iter, size_t block); 1115 int afs_dir_search_bucket(struct afs_dir_iter *iter, const struct qstr *name, 1116 struct afs_fid *_fid); 1117 int afs_dir_search(struct afs_vnode *dvnode, struct qstr *name, 1118 struct afs_fid *_fid, afs_dataversion_t *_dir_version); 1119 1120 /* 1121 * dir_silly.c 1122 */ 1123 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, 1124 struct dentry *, struct key *); 1125 extern int afs_silly_iput(struct dentry *, struct inode *); 1126 1127 /* 1128 * dynroot.c 1129 */ 1130 extern const struct inode_operations afs_dynroot_inode_operations; 1131 extern const struct dentry_operations afs_dynroot_dentry_operations; 1132 1133 struct inode *afs_dynroot_iget_root(struct super_block *sb); 1134 1135 /* 1136 * file.c 1137 */ 1138 extern const struct address_space_operations afs_file_aops; 1139 extern const struct inode_operations afs_file_inode_operations; 1140 extern const struct file_operations afs_file_operations; 1141 extern const struct afs_operation_ops afs_fetch_data_operation; 1142 extern const struct netfs_request_ops afs_req_ops; 1143 1144 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); 1145 extern void afs_put_wb_key(struct afs_wb_key *); 1146 extern int afs_open(struct inode *, struct file *); 1147 extern int afs_release(struct inode *, struct file *); 1148 void afs_fetch_data_async_rx(struct work_struct *work); 1149 void afs_fetch_data_immediate_cancel(struct afs_call *call); 1150 1151 /* 1152 * flock.c 1153 */ 1154 extern struct workqueue_struct *afs_lock_manager; 1155 1156 extern void afs_lock_op_done(struct afs_call *); 1157 extern void afs_lock_work(struct work_struct *); 1158 extern void afs_lock_may_be_available(struct afs_vnode *); 1159 extern int afs_lock(struct file *, int, struct file_lock *); 1160 extern int afs_flock(struct file *, int, struct file_lock *); 1161 1162 /* 1163 * fsclient.c 1164 */ 1165 extern void afs_fs_fetch_status(struct afs_operation *); 1166 extern void afs_fs_fetch_data(struct afs_operation *); 1167 extern void afs_fs_create_file(struct afs_operation *); 1168 extern void afs_fs_make_dir(struct afs_operation *); 1169 extern void afs_fs_remove_file(struct afs_operation *); 1170 extern void afs_fs_remove_dir(struct afs_operation *); 1171 extern void afs_fs_link(struct afs_operation *); 1172 extern void afs_fs_symlink(struct afs_operation *); 1173 extern void afs_fs_rename(struct afs_operation *); 1174 extern void afs_fs_store_data(struct afs_operation *); 1175 extern void afs_fs_setattr(struct afs_operation *); 1176 extern void afs_fs_get_volume_status(struct afs_operation *); 1177 extern void afs_fs_set_lock(struct afs_operation *); 1178 extern void afs_fs_extend_lock(struct afs_operation *); 1179 extern void afs_fs_release_lock(struct afs_operation *); 1180 int afs_fs_give_up_all_callbacks(struct afs_net *net, struct afs_server *server, 1181 struct afs_address *addr, struct key *key); 1182 bool afs_fs_get_capabilities(struct afs_net *net, struct afs_server *server, 1183 struct afs_endpoint_state *estate, unsigned int addr_index, 1184 struct key *key); 1185 extern void afs_fs_inline_bulk_status(struct afs_operation *); 1186 1187 struct afs_acl { 1188 u32 size; 1189 u8 data[] __counted_by(size); 1190 }; 1191 1192 extern void afs_fs_fetch_acl(struct afs_operation *); 1193 extern void afs_fs_store_acl(struct afs_operation *); 1194 1195 /* 1196 * fs_operation.c 1197 */ 1198 extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); 1199 extern int afs_put_operation(struct afs_operation *); 1200 extern bool afs_begin_vnode_operation(struct afs_operation *); 1201 extern void afs_end_vnode_operation(struct afs_operation *op); 1202 extern void afs_wait_for_operation(struct afs_operation *); 1203 extern int afs_do_sync_operation(struct afs_operation *); 1204 1205 static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, 1206 struct afs_vnode *vnode) 1207 { 1208 op->file[n].vnode = vnode; 1209 op->file[n].need_io_lock = true; 1210 } 1211 1212 static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, 1213 const struct afs_fid *fid) 1214 { 1215 op->file[n].fid = *fid; 1216 } 1217 1218 /* 1219 * fs_probe.c 1220 */ 1221 struct afs_endpoint_state *afs_get_endpoint_state(struct afs_endpoint_state *estate, 1222 enum afs_estate_trace where); 1223 void afs_put_endpoint_state(struct afs_endpoint_state *estate, enum afs_estate_trace where); 1224 extern void afs_fileserver_probe_result(struct afs_call *); 1225 int afs_fs_probe_fileserver(struct afs_net *net, struct afs_server *server, 1226 struct afs_addr_list *new_alist, struct key *key); 1227 int afs_wait_for_fs_probes(struct afs_operation *op, struct afs_server_state *states, bool intr); 1228 extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); 1229 extern void afs_fs_probe_dispatcher(struct work_struct *); 1230 int afs_wait_for_one_fs_probe(struct afs_server *server, struct afs_endpoint_state *estate, 1231 unsigned long exclude, bool is_intr); 1232 extern void afs_fs_probe_cleanup(struct afs_net *); 1233 1234 /* 1235 * inode.c 1236 */ 1237 extern const struct afs_operation_ops afs_fetch_status_operation; 1238 1239 void afs_init_new_symlink(struct afs_vnode *vnode, struct afs_operation *op); 1240 const char *afs_get_link(struct dentry *dentry, struct inode *inode, 1241 struct delayed_call *callback); 1242 int afs_readlink(struct dentry *dentry, char __user *buffer, int buflen); 1243 extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); 1244 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); 1245 extern int afs_ilookup5_test_by_fid(struct inode *, void *); 1246 extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); 1247 extern struct inode *afs_root_iget(struct super_block *, struct key *); 1248 extern int afs_getattr(struct mnt_idmap *idmap, const struct path *, 1249 struct kstat *, u32, unsigned int); 1250 extern int afs_setattr(struct mnt_idmap *idmap, struct dentry *, struct iattr *); 1251 extern void afs_evict_inode(struct inode *); 1252 extern int afs_drop_inode(struct inode *); 1253 1254 /* 1255 * main.c 1256 */ 1257 extern struct workqueue_struct *afs_wq; 1258 extern int afs_net_id; 1259 1260 static inline struct afs_net *afs_net(struct net *net) 1261 { 1262 return net_generic(net, afs_net_id); 1263 } 1264 1265 static inline struct afs_net *afs_sb2net(struct super_block *sb) 1266 { 1267 return afs_net(AFS_FS_S(sb)->net_ns); 1268 } 1269 1270 static inline struct afs_net *afs_d2net(struct dentry *dentry) 1271 { 1272 return afs_sb2net(dentry->d_sb); 1273 } 1274 1275 static inline struct afs_net *afs_i2net(struct inode *inode) 1276 { 1277 return afs_sb2net(inode->i_sb); 1278 } 1279 1280 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 1281 { 1282 return afs_i2net(&vnode->netfs.inode); 1283 } 1284 1285 static inline struct afs_net *afs_sock2net(struct sock *sk) 1286 { 1287 return net_generic(sock_net(sk), afs_net_id); 1288 } 1289 1290 static inline void __afs_stat(atomic_t *s) 1291 { 1292 atomic_inc(s); 1293 } 1294 1295 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) 1296 1297 /* 1298 * misc.c 1299 */ 1300 extern int afs_abort_to_error(u32); 1301 extern void afs_prioritise_error(struct afs_error *, int, u32); 1302 1303 static inline void afs_op_nomem(struct afs_operation *op) 1304 { 1305 op->cumul_error.error = -ENOMEM; 1306 } 1307 1308 static inline int afs_op_error(const struct afs_operation *op) 1309 { 1310 return op->cumul_error.error; 1311 } 1312 1313 static inline s32 afs_op_abort_code(const struct afs_operation *op) 1314 { 1315 return op->cumul_error.abort_code; 1316 } 1317 1318 static inline int afs_op_set_error(struct afs_operation *op, int error) 1319 { 1320 return op->cumul_error.error = error; 1321 } 1322 1323 static inline void afs_op_accumulate_error(struct afs_operation *op, int error, s32 abort_code) 1324 { 1325 afs_prioritise_error(&op->cumul_error, error, abort_code); 1326 } 1327 1328 /* 1329 * mntpt.c 1330 */ 1331 extern const struct inode_operations afs_mntpt_inode_operations; 1332 extern const struct inode_operations afs_autocell_inode_operations; 1333 extern const struct file_operations afs_mntpt_file_operations; 1334 1335 extern struct vfsmount *afs_d_automount(struct path *); 1336 extern void afs_mntpt_kill_timer(void); 1337 1338 /* 1339 * proc.c 1340 */ 1341 #ifdef CONFIG_PROC_FS 1342 extern int __net_init afs_proc_init(struct afs_net *); 1343 extern void __net_exit afs_proc_cleanup(struct afs_net *); 1344 extern int afs_proc_cell_setup(struct afs_cell *); 1345 extern void afs_proc_cell_remove(struct afs_cell *); 1346 extern void afs_put_sysnames(struct afs_sysnames *); 1347 #else 1348 static inline int afs_proc_init(struct afs_net *net) { return 0; } 1349 static inline void afs_proc_cleanup(struct afs_net *net) {} 1350 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } 1351 static inline void afs_proc_cell_remove(struct afs_cell *cell) {} 1352 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} 1353 #endif 1354 1355 /* 1356 * rotate.c 1357 */ 1358 void afs_clear_server_states(struct afs_operation *op); 1359 extern bool afs_select_fileserver(struct afs_operation *); 1360 extern void afs_dump_edestaddrreq(const struct afs_operation *); 1361 1362 /* 1363 * rxrpc.c 1364 */ 1365 extern struct workqueue_struct *afs_async_calls; 1366 1367 extern int __net_init afs_open_socket(struct afs_net *); 1368 extern void __net_exit afs_close_socket(struct afs_net *); 1369 extern void afs_charge_preallocation(struct work_struct *); 1370 extern void afs_put_call(struct afs_call *); 1371 void afs_deferred_put_call(struct afs_call *call); 1372 void afs_make_call(struct afs_call *call, gfp_t gfp); 1373 void afs_deliver_to_call(struct afs_call *call); 1374 void afs_wait_for_call_to_complete(struct afs_call *call); 1375 extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 1376 const struct afs_call_type *, 1377 size_t, size_t); 1378 extern void afs_flat_call_destructor(struct afs_call *); 1379 extern void afs_send_empty_reply(struct afs_call *); 1380 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 1381 extern int afs_extract_data(struct afs_call *, bool); 1382 extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); 1383 1384 static inline struct afs_call *afs_get_call(struct afs_call *call, 1385 enum afs_call_trace why) 1386 { 1387 int r; 1388 1389 __refcount_inc(&call->ref, &r); 1390 1391 trace_afs_call(call->debug_id, why, r + 1, 1392 atomic_read(&call->net->nr_outstanding_calls), 1393 __builtin_return_address(0)); 1394 return call; 1395 } 1396 1397 static inline void afs_see_call(struct afs_call *call, enum afs_call_trace why) 1398 { 1399 int r = refcount_read(&call->ref); 1400 1401 trace_afs_call(call->debug_id, why, r, 1402 atomic_read(&call->net->nr_outstanding_calls), 1403 __builtin_return_address(0)); 1404 } 1405 1406 static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, 1407 gfp_t gfp) 1408 { 1409 struct afs_addr_list *alist = op->estate->addresses; 1410 1411 op->call = call; 1412 op->type = call->type; 1413 call->op = op; 1414 call->key = op->key; 1415 call->intr = !(op->flags & AFS_OPERATION_UNINTR); 1416 call->peer = rxrpc_kernel_get_peer(alist->addrs[op->addr_index].peer); 1417 call->service_id = op->server->service_id; 1418 afs_make_call(call, gfp); 1419 } 1420 1421 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) 1422 { 1423 call->iov_len = size; 1424 call->kvec[0].iov_base = buf; 1425 call->kvec[0].iov_len = size; 1426 iov_iter_kvec(&call->def_iter, ITER_DEST, call->kvec, 1, size); 1427 } 1428 1429 static inline void afs_extract_to_tmp(struct afs_call *call) 1430 { 1431 call->iov_len = sizeof(call->tmp); 1432 afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); 1433 } 1434 1435 static inline void afs_extract_to_tmp64(struct afs_call *call) 1436 { 1437 call->iov_len = sizeof(call->tmp64); 1438 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); 1439 } 1440 1441 static inline void afs_extract_discard(struct afs_call *call, size_t size) 1442 { 1443 call->iov_len = size; 1444 iov_iter_discard(&call->def_iter, ITER_DEST, size); 1445 } 1446 1447 static inline void afs_extract_to_buf(struct afs_call *call, size_t size) 1448 { 1449 call->iov_len = size; 1450 afs_extract_begin(call, call->buffer, size); 1451 } 1452 1453 static inline int afs_transfer_reply(struct afs_call *call) 1454 { 1455 return afs_extract_data(call, false); 1456 } 1457 1458 static inline bool afs_check_call_state(struct afs_call *call, 1459 enum afs_call_state state) 1460 { 1461 return READ_ONCE(call->state) == state; 1462 } 1463 1464 static inline bool afs_set_call_state(struct afs_call *call, 1465 enum afs_call_state from, 1466 enum afs_call_state to) 1467 { 1468 bool ok = false; 1469 1470 spin_lock_bh(&call->state_lock); 1471 if (call->state == from) { 1472 call->state = to; 1473 trace_afs_call_state(call, from, to, 0, 0); 1474 ok = true; 1475 } 1476 spin_unlock_bh(&call->state_lock); 1477 return ok; 1478 } 1479 1480 static inline void afs_set_call_complete(struct afs_call *call, 1481 int error, u32 remote_abort) 1482 { 1483 enum afs_call_state state; 1484 bool ok = false; 1485 1486 spin_lock_bh(&call->state_lock); 1487 state = call->state; 1488 if (state != AFS_CALL_COMPLETE) { 1489 call->abort_code = remote_abort; 1490 call->error = error; 1491 call->state = AFS_CALL_COMPLETE; 1492 trace_afs_call_state(call, state, AFS_CALL_COMPLETE, 1493 error, remote_abort); 1494 ok = true; 1495 } 1496 spin_unlock_bh(&call->state_lock); 1497 if (ok) { 1498 trace_afs_call_done(call); 1499 1500 /* Asynchronous calls have two refs to release - one from the alloc and 1501 * one queued with the work item - and we can't just deallocate the 1502 * call because the work item may be queued again. 1503 */ 1504 if (call->drop_ref) 1505 afs_put_call(call); 1506 } 1507 } 1508 1509 /* 1510 * security.c 1511 */ 1512 extern void afs_put_permits(struct afs_permits *); 1513 extern void afs_clear_permits(struct afs_vnode *); 1514 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, 1515 struct afs_status_cb *); 1516 extern struct key *afs_request_key(struct afs_cell *); 1517 extern struct key *afs_request_key_rcu(struct afs_cell *); 1518 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); 1519 extern int afs_permission(struct mnt_idmap *, struct inode *, int); 1520 extern void __exit afs_clean_up_permit_cache(void); 1521 1522 /* 1523 * server.c 1524 */ 1525 extern spinlock_t afs_server_peer_lock; 1526 1527 struct afs_server *afs_find_server(const struct rxrpc_peer *peer); 1528 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); 1529 extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); 1530 struct afs_server *afs_use_server(struct afs_server *server, bool activate, 1531 enum afs_server_trace reason); 1532 void afs_unuse_server(struct afs_net *net, struct afs_server *server, 1533 enum afs_server_trace reason); 1534 void afs_unuse_server_notime(struct afs_net *net, struct afs_server *server, 1535 enum afs_server_trace reason); 1536 extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1537 void afs_purge_servers(struct afs_cell *cell); 1538 extern void afs_fs_probe_timer(struct timer_list *); 1539 void __net_exit afs_wait_for_servers(struct afs_net *net); 1540 bool afs_check_server_record(struct afs_operation *op, struct afs_server *server, struct key *key); 1541 1542 static inline void afs_see_server(struct afs_server *server, enum afs_server_trace trace) 1543 { 1544 int r = refcount_read(&server->ref); 1545 int a = atomic_read(&server->active); 1546 1547 trace_afs_server(server->debug_id, r, a, trace); 1548 1549 } 1550 1551 static inline void afs_inc_servers_outstanding(struct afs_net *net) 1552 { 1553 atomic_inc(&net->servers_outstanding); 1554 } 1555 1556 static inline void afs_dec_servers_outstanding(struct afs_net *net) 1557 { 1558 if (atomic_dec_and_test(&net->servers_outstanding)) 1559 wake_up_var(&net->servers_outstanding); 1560 } 1561 1562 static inline bool afs_is_probing_server(struct afs_server *server) 1563 { 1564 return list_empty(&server->probe_link); 1565 } 1566 1567 /* 1568 * server_list.c 1569 */ 1570 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) 1571 { 1572 refcount_inc(&slist->usage); 1573 return slist; 1574 } 1575 1576 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); 1577 struct afs_server_list *afs_alloc_server_list(struct afs_volume *volume, 1578 struct key *key, 1579 struct afs_vldb_entry *vldb); 1580 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); 1581 void afs_attach_volume_to_servers(struct afs_volume *volume, struct afs_server_list *slist); 1582 void afs_reattach_volume_to_servers(struct afs_volume *volume, struct afs_server_list *slist, 1583 struct afs_server_list *old); 1584 void afs_detach_volume_from_servers(struct afs_volume *volume, struct afs_server_list *slist); 1585 1586 /* 1587 * super.c 1588 */ 1589 extern int __init afs_fs_init(void); 1590 extern void afs_fs_exit(void); 1591 1592 /* 1593 * validation.c 1594 */ 1595 bool afs_check_validity(const struct afs_vnode *vnode); 1596 int afs_update_volume_state(struct afs_operation *op); 1597 int afs_validate(struct afs_vnode *vnode, struct key *key); 1598 1599 /* 1600 * vlclient.c 1601 */ 1602 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, 1603 const char *, int); 1604 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); 1605 struct afs_call *afs_vl_get_capabilities(struct afs_net *net, 1606 struct afs_addr_list *alist, 1607 unsigned int addr_index, 1608 struct key *key, 1609 struct afs_vlserver *server, 1610 unsigned int server_index); 1611 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); 1612 extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); 1613 1614 /* 1615 * vl_alias.c 1616 */ 1617 extern int afs_cell_detect_alias(struct afs_cell *, struct key *); 1618 1619 /* 1620 * vl_probe.c 1621 */ 1622 extern void afs_vlserver_probe_result(struct afs_call *); 1623 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); 1624 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); 1625 1626 /* 1627 * vl_rotate.c 1628 */ 1629 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, 1630 struct afs_cell *, struct key *); 1631 extern bool afs_select_vlserver(struct afs_vl_cursor *); 1632 extern bool afs_select_current_vlserver(struct afs_vl_cursor *); 1633 extern int afs_end_vlserver_operation(struct afs_vl_cursor *); 1634 1635 /* 1636 * vlserver_list.c 1637 */ 1638 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) 1639 { 1640 refcount_inc(&vlserver->ref); 1641 return vlserver; 1642 } 1643 1644 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) 1645 { 1646 if (vllist) 1647 refcount_inc(&vllist->ref); 1648 return vllist; 1649 } 1650 1651 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); 1652 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); 1653 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); 1654 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); 1655 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, 1656 const void *, size_t); 1657 1658 /* 1659 * volume.c 1660 */ 1661 extern struct afs_volume *afs_create_volume(struct afs_fs_context *); 1662 extern int afs_activate_volume(struct afs_volume *); 1663 extern void afs_deactivate_volume(struct afs_volume *); 1664 bool afs_try_get_volume(struct afs_volume *volume, enum afs_volume_trace reason); 1665 extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); 1666 void afs_put_volume(struct afs_volume *volume, enum afs_volume_trace reason); 1667 extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); 1668 1669 /* 1670 * write.c 1671 */ 1672 void afs_prepare_write(struct netfs_io_subrequest *subreq); 1673 void afs_issue_write(struct netfs_io_subrequest *subreq); 1674 void afs_begin_writeback(struct netfs_io_request *wreq); 1675 void afs_retry_request(struct netfs_io_request *wreq, struct netfs_io_stream *stream); 1676 extern int afs_writepages(struct address_space *, struct writeback_control *); 1677 extern int afs_fsync(struct file *, loff_t, loff_t, int); 1678 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); 1679 extern void afs_prune_wb_keys(struct afs_vnode *); 1680 1681 /* 1682 * xattr.c 1683 */ 1684 extern const struct xattr_handler * const afs_xattr_handlers[]; 1685 1686 /* 1687 * yfsclient.c 1688 */ 1689 extern void yfs_fs_fetch_data(struct afs_operation *); 1690 extern void yfs_fs_create_file(struct afs_operation *); 1691 extern void yfs_fs_make_dir(struct afs_operation *); 1692 extern void yfs_fs_remove_file2(struct afs_operation *); 1693 extern void yfs_fs_remove_file(struct afs_operation *); 1694 extern void yfs_fs_remove_dir(struct afs_operation *); 1695 extern void yfs_fs_link(struct afs_operation *); 1696 extern void yfs_fs_symlink(struct afs_operation *); 1697 extern void yfs_fs_rename(struct afs_operation *); 1698 void yfs_fs_rename_replace(struct afs_operation *op); 1699 void yfs_fs_rename_noreplace(struct afs_operation *op); 1700 void yfs_fs_rename_exchange(struct afs_operation *op); 1701 extern void yfs_fs_store_data(struct afs_operation *); 1702 extern void yfs_fs_setattr(struct afs_operation *); 1703 extern void yfs_fs_get_volume_status(struct afs_operation *); 1704 extern void yfs_fs_set_lock(struct afs_operation *); 1705 extern void yfs_fs_extend_lock(struct afs_operation *); 1706 extern void yfs_fs_release_lock(struct afs_operation *); 1707 extern void yfs_fs_fetch_status(struct afs_operation *); 1708 extern void yfs_fs_inline_bulk_status(struct afs_operation *); 1709 1710 struct yfs_acl { 1711 struct afs_acl *acl; /* Dir/file/symlink ACL */ 1712 struct afs_acl *vol_acl; /* Whole volume ACL */ 1713 u32 inherit_flag; /* True if ACL is inherited from parent dir */ 1714 u32 num_cleaned; /* Number of ACEs removed due to subject removal */ 1715 unsigned int flags; 1716 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ 1717 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ 1718 }; 1719 1720 extern void yfs_free_opaque_acl(struct yfs_acl *); 1721 extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); 1722 extern void yfs_fs_store_opaque_acl2(struct afs_operation *); 1723 1724 /* 1725 * Miscellaneous inline functions. 1726 */ 1727 static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 1728 { 1729 return container_of(inode, struct afs_vnode, netfs.inode); 1730 } 1731 1732 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 1733 { 1734 return &vnode->netfs.inode; 1735 } 1736 1737 /* 1738 * Note that a dentry got changed. We need to set d_fsdata to the data version 1739 * number derived from the result of the operation. It doesn't matter if 1740 * d_fsdata goes backwards as we'll just revalidate. 1741 */ 1742 static inline void afs_update_dentry_version(struct afs_operation *op, 1743 struct afs_vnode_param *dir_vp, 1744 struct dentry *dentry) 1745 { 1746 if (!op->cumul_error.error) 1747 dentry->d_fsdata = 1748 (void *)(unsigned long)dir_vp->scb.status.data_version; 1749 } 1750 1751 /* 1752 * Set the file size and block count. Estimate the number of 512 bytes blocks 1753 * used, rounded up to nearest 1K for consistency with other AFS clients. 1754 */ 1755 static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size) 1756 { 1757 i_size_write(&vnode->netfs.inode, size); 1758 vnode->netfs.inode.i_blocks = ((size + 1023) >> 10) << 1; 1759 } 1760 1761 /* 1762 * Check for a conflicting operation on a directory that we just unlinked from. 1763 * If someone managed to sneak a link or an unlink in on the file we just 1764 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). 1765 */ 1766 static inline void afs_check_dir_conflict(struct afs_operation *op, 1767 struct afs_vnode_param *dvp) 1768 { 1769 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) 1770 op->flags |= AFS_OPERATION_DIR_CONFLICT; 1771 } 1772 1773 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) 1774 { 1775 trace_afs_io_error(call->debug_id, -EIO, where); 1776 return -EIO; 1777 } 1778 1779 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) 1780 { 1781 trace_afs_file_error(vnode, -EIO, where); 1782 return -EIO; 1783 } 1784 1785 /* 1786 * Set the callback promise on a vnode. 1787 */ 1788 static inline void afs_set_cb_promise(struct afs_vnode *vnode, time64_t expires_at, 1789 enum afs_cb_promise_trace trace) 1790 { 1791 atomic64_set(&vnode->cb_expires_at, expires_at); 1792 trace_afs_cb_promise(vnode, trace); 1793 } 1794 1795 /* 1796 * Clear the callback promise on a vnode, returning true if it was promised. 1797 */ 1798 static inline bool afs_clear_cb_promise(struct afs_vnode *vnode, 1799 enum afs_cb_promise_trace trace) 1800 { 1801 trace_afs_cb_promise(vnode, trace); 1802 return atomic64_xchg(&vnode->cb_expires_at, AFS_NO_CB_PROMISE) != AFS_NO_CB_PROMISE; 1803 } 1804 1805 /* 1806 * Mark a directory as being invalid. 1807 */ 1808 static inline void afs_invalidate_dir(struct afs_vnode *dvnode, 1809 enum afs_dir_invalid_trace trace) 1810 { 1811 if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) { 1812 trace_afs_dir_invalid(dvnode, trace); 1813 afs_stat_v(dvnode, n_inval); 1814 } 1815 } 1816 1817 /*****************************************************************************/ 1818 /* 1819 * debug tracing 1820 */ 1821 extern unsigned afs_debug; 1822 1823 #define dbgprintk(FMT,...) \ 1824 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1825 1826 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1827 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1828 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1829 1830 1831 #if defined(__KDEBUG) 1832 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1833 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1834 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1835 1836 #elif defined(CONFIG_AFS_DEBUG) 1837 #define AFS_DEBUG_KENTER 0x01 1838 #define AFS_DEBUG_KLEAVE 0x02 1839 #define AFS_DEBUG_KDEBUG 0x04 1840 1841 #define _enter(FMT,...) \ 1842 do { \ 1843 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 1844 kenter(FMT,##__VA_ARGS__); \ 1845 } while (0) 1846 1847 #define _leave(FMT,...) \ 1848 do { \ 1849 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 1850 kleave(FMT,##__VA_ARGS__); \ 1851 } while (0) 1852 1853 #define _debug(FMT,...) \ 1854 do { \ 1855 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 1856 kdebug(FMT,##__VA_ARGS__); \ 1857 } while (0) 1858 1859 #else 1860 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1861 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1862 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1863 #endif 1864 1865 /* 1866 * debug assertion checking 1867 */ 1868 #if 1 // defined(__KDEBUGALL) 1869 1870 #define ASSERT(X) \ 1871 do { \ 1872 if (unlikely(!(X))) { \ 1873 printk(KERN_ERR "\n"); \ 1874 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1875 BUG(); \ 1876 } \ 1877 } while(0) 1878 1879 #define ASSERTCMP(X, OP, Y) \ 1880 do { \ 1881 if (unlikely(!((X) OP (Y)))) { \ 1882 printk(KERN_ERR "\n"); \ 1883 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1884 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1885 (unsigned long)(X), (unsigned long)(Y)); \ 1886 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1887 (unsigned long)(X), (unsigned long)(Y)); \ 1888 BUG(); \ 1889 } \ 1890 } while(0) 1891 1892 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1893 do { \ 1894 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 1895 printk(KERN_ERR "\n"); \ 1896 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1897 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 1898 (unsigned long)(L), (unsigned long)(N), \ 1899 (unsigned long)(H)); \ 1900 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 1901 (unsigned long)(L), (unsigned long)(N), \ 1902 (unsigned long)(H)); \ 1903 BUG(); \ 1904 } \ 1905 } while(0) 1906 1907 #define ASSERTIF(C, X) \ 1908 do { \ 1909 if (unlikely((C) && !(X))) { \ 1910 printk(KERN_ERR "\n"); \ 1911 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1912 BUG(); \ 1913 } \ 1914 } while(0) 1915 1916 #define ASSERTIFCMP(C, X, OP, Y) \ 1917 do { \ 1918 if (unlikely((C) && !((X) OP (Y)))) { \ 1919 printk(KERN_ERR "\n"); \ 1920 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1921 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1922 (unsigned long)(X), (unsigned long)(Y)); \ 1923 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1924 (unsigned long)(X), (unsigned long)(Y)); \ 1925 BUG(); \ 1926 } \ 1927 } while(0) 1928 1929 #else 1930 1931 #define ASSERT(X) \ 1932 do { \ 1933 } while(0) 1934 1935 #define ASSERTCMP(X, OP, Y) \ 1936 do { \ 1937 } while(0) 1938 1939 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1940 do { \ 1941 } while(0) 1942 1943 #define ASSERTIF(C, X) \ 1944 do { \ 1945 } while(0) 1946 1947 #define ASSERTIFCMP(C, X, OP, Y) \ 1948 do { \ 1949 } while(0) 1950 1951 #endif /* __KDEBUGALL */ 1952