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_UNLOOKED, 347 AFS_CELL_ACTIVE, 348 AFS_CELL_REMOVING, 349 AFS_CELL_DEAD, 350 }; 351 352 /* 353 * AFS cell record. 354 * 355 * This is a tricky concept to get right as it is possible to create aliases 356 * simply by pointing AFSDB/SRV records for two names at the same set of VL 357 * servers; it is also possible to do things like setting up two sets of VL 358 * servers, one of which provides a superset of the volumes provided by the 359 * other (for internal/external division, for example). 360 * 361 * Cells only exist in the sense that (a) a cell's name maps to a set of VL 362 * servers and (b) a cell's name is used by the client to select the key to use 363 * for authentication and encryption. The cell name is not typically used in 364 * the protocol. 365 * 366 * Two cells are determined to be aliases if they have an explicit alias (YFS 367 * only), share any VL servers in common or have at least one volume in common. 368 * "In common" means that the address list of the VL servers or the fileservers 369 * share at least one endpoint. 370 */ 371 struct afs_cell { 372 union { 373 struct rcu_head rcu; 374 struct rb_node net_node; /* Node in net->cells */ 375 }; 376 struct afs_net *net; 377 struct afs_cell *alias_of; /* The cell this is an alias of */ 378 struct afs_volume *root_volume; /* The root.cell volume if there is one */ 379 struct key *anonymous_key; /* anonymous user key for this cell */ 380 struct work_struct destroyer; /* Destroyer for cell */ 381 struct work_struct manager; /* Manager for init/deinit/dns */ 382 struct timer_list management_timer; /* General management timer */ 383 struct hlist_node proc_link; /* /proc cell list link */ 384 time64_t dns_expiry; /* Time AFSDB/SRV record expires */ 385 time64_t last_inactive; /* Time of last drop of usage count */ 386 refcount_t ref; /* Struct refcount */ 387 atomic_t active; /* Active usage counter */ 388 unsigned long flags; 389 #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */ 390 #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */ 391 #define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */ 392 enum afs_cell_state state; 393 short error; 394 enum dns_record_source dns_source:8; /* Latest source of data from lookup */ 395 enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */ 396 unsigned int dns_lookup_count; /* Counter of DNS lookups */ 397 unsigned int debug_id; 398 unsigned int dynroot_ino; /* Inode numbers for dynroot (a pair) */ 399 400 /* The volumes belonging to this cell */ 401 struct rw_semaphore vs_lock; /* Lock for server->volumes */ 402 struct rb_root volumes; /* Tree of volumes on this server */ 403 struct hlist_head proc_volumes; /* procfs volume list */ 404 seqlock_t volume_lock; /* For volumes */ 405 406 /* Active fileserver interaction state. */ 407 struct rb_root fs_servers; /* afs_server (by server UUID) */ 408 struct rw_semaphore fs_lock; /* For fs_servers */ 409 410 /* VL server list. */ 411 rwlock_t vl_servers_lock; /* Lock on vl_servers */ 412 struct afs_vlserver_list __rcu *vl_servers; 413 414 u8 name_len; /* Length of name */ 415 char *name; /* Cell name, case-flattened and NUL-padded */ 416 }; 417 418 /* 419 * Volume Location server record. 420 */ 421 struct afs_vlserver { 422 struct rcu_head rcu; 423 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */ 424 unsigned long flags; 425 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ 426 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ 427 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ 428 #define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */ 429 rwlock_t lock; /* Lock on addresses */ 430 refcount_t ref; 431 unsigned int rtt; /* Server's current RTT in uS */ 432 unsigned int debug_id; 433 434 /* Probe state */ 435 wait_queue_head_t probe_wq; 436 atomic_t probe_outstanding; 437 spinlock_t probe_lock; 438 struct { 439 unsigned int rtt; /* Best RTT in uS (or UINT_MAX) */ 440 u32 abort_code; 441 short error; 442 unsigned short flags; 443 #define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */ 444 #define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */ 445 #define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */ 446 #define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */ 447 } probe; 448 449 u16 service_id; /* Service ID we're using */ 450 u16 port; 451 u16 name_len; /* Length of name */ 452 char name[]; /* Server name, case-flattened */ 453 }; 454 455 /* 456 * Weighted list of Volume Location servers. 457 */ 458 struct afs_vlserver_entry { 459 u16 priority; /* Preference (as SRV) */ 460 u16 weight; /* Weight (as SRV) */ 461 enum dns_record_source source:8; 462 enum dns_lookup_status status:8; 463 struct afs_vlserver *server; 464 }; 465 466 struct afs_vlserver_list { 467 struct rcu_head rcu; 468 refcount_t ref; 469 u8 nr_servers; 470 u8 index; /* Server currently in use */ 471 u8 preferred; /* Preferred server */ 472 enum dns_record_source source:8; 473 enum dns_lookup_status status:8; 474 rwlock_t lock; 475 struct afs_vlserver_entry servers[]; 476 }; 477 478 /* 479 * Cached VLDB entry. 480 * 481 * This is pointed to by cell->vldb_entries, indexed by name. 482 */ 483 struct afs_vldb_entry { 484 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ 485 486 unsigned long flags; 487 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ 488 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ 489 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ 490 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ 491 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ 492 493 uuid_t fs_server[AFS_NMAXNSERVERS]; 494 u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */ 495 u8 fs_mask[AFS_NMAXNSERVERS]; 496 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 497 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 498 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 499 u8 vlsf_flags[AFS_NMAXNSERVERS]; 500 short error; 501 u8 nr_servers; /* Number of server records */ 502 u8 name_len; 503 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 504 }; 505 506 /* 507 * Fileserver endpoint state. The records the addresses of a fileserver's 508 * endpoints and the state and result of a round of probing on them. This 509 * allows the rotation algorithm to access those results without them being 510 * erased by a subsequent round of probing. 511 */ 512 struct afs_endpoint_state { 513 struct rcu_head rcu; 514 struct afs_addr_list *addresses; /* The addresses being probed */ 515 unsigned long responsive_set; /* Bitset of responsive endpoints */ 516 unsigned long failed_set; /* Bitset of endpoints we failed to probe */ 517 refcount_t ref; 518 unsigned int server_id; /* Debug ID of server */ 519 unsigned int probe_seq; /* Probe sequence (from server::probe_counter) */ 520 atomic_t nr_probing; /* Number of outstanding probes */ 521 unsigned int rtt; /* Best RTT in uS (or UINT_MAX) */ 522 s32 abort_code; 523 short error; 524 unsigned long flags; 525 #define AFS_ESTATE_RESPONDED 0 /* Set if the server responded */ 526 #define AFS_ESTATE_SUPERSEDED 1 /* Set if this record has been superseded */ 527 #define AFS_ESTATE_IS_YFS 2 /* Set if probe upgraded to YFS */ 528 #define AFS_ESTATE_NOT_YFS 3 /* Set if probe didn't upgrade to YFS */ 529 #define AFS_ESTATE_LOCAL_FAILURE 4 /* Set if there was a local failure (eg. ENOMEM) */ 530 }; 531 532 /* 533 * Record of fileserver with which we're actively communicating. 534 */ 535 struct afs_server { 536 struct rcu_head rcu; 537 union { 538 uuid_t uuid; /* Server ID */ 539 struct afs_uuid _uuid; 540 }; 541 542 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 543 struct rb_node uuid_rb; /* Link in cell->fs_servers */ 544 struct list_head probe_link; /* Link in net->fs_probe_* */ 545 struct hlist_node proc_link; /* Link in net->fs_proc */ 546 struct list_head volumes; /* RCU list of afs_server_entry objects */ 547 struct work_struct destroyer; /* Work item to try and destroy a server */ 548 struct timer_list timer; /* Management timer */ 549 struct mutex cm_token_lock; /* Lock governing creation of appdata */ 550 struct krb5_buffer cm_rxgk_appdata; /* Appdata to be included in RESPONSE packet */ 551 time64_t unuse_time; /* Time at which last unused */ 552 unsigned long flags; 553 #define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */ 554 #define AFS_SERVER_FL_UPDATING 1 555 #define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */ 556 #define AFS_SERVER_FL_UNCREATED 3 /* The record needs creating */ 557 #define AFS_SERVER_FL_CREATING 4 /* The record is being created */ 558 #define AFS_SERVER_FL_EXPIRED 5 /* The record has expired */ 559 #define AFS_SERVER_FL_NOT_FOUND 6 /* VL server says no such server */ 560 #define AFS_SERVER_FL_VL_FAIL 7 /* Failed to access VL server */ 561 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ 562 #define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */ 563 #define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */ 564 #define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */ 565 #define AFS_SERVER_FL_HAS_FS64 19 /* Fileserver supports FS.{Fetch,Store}Data64 */ 566 #define AFS_SERVER_FL_NO_RENAME2 20 /* YFS Fileserver doesn't support enhanced rename */ 567 refcount_t ref; /* Object refcount */ 568 atomic_t active; /* Active user count */ 569 u32 addr_version; /* Address list version */ 570 u16 service_id; /* Service ID we're using. */ 571 short create_error; /* Creation error */ 572 unsigned int rtt; /* Server's current RTT in uS */ 573 unsigned int debug_id; /* Debugging ID for traces */ 574 575 /* file service access */ 576 rwlock_t fs_lock; /* access lock */ 577 578 /* Probe state */ 579 struct afs_endpoint_state __rcu *endpoint_state; /* Latest endpoint/probe state */ 580 unsigned long probed_at; /* Time last probe was dispatched (jiffies) */ 581 wait_queue_head_t probe_wq; 582 unsigned int probe_counter; /* Number of probes issued */ 583 spinlock_t probe_lock; 584 }; 585 586 enum afs_ro_replicating { 587 AFS_RO_NOT_REPLICATING, /* Not doing replication */ 588 AFS_RO_REPLICATING_USE_OLD, /* Replicating; use old version */ 589 AFS_RO_REPLICATING_USE_NEW, /* Replicating; switch to new version */ 590 } __mode(byte); 591 592 /* 593 * Replaceable volume server list. 594 */ 595 struct afs_server_entry { 596 struct afs_server *server; 597 struct afs_volume *volume; 598 struct list_head slink; /* Link in server->volumes */ 599 time64_t cb_expires_at; /* Time at which volume-level callback expires */ 600 unsigned long flags; 601 #define AFS_SE_EXCLUDED 0 /* Set if server is to be excluded in rotation */ 602 #define AFS_SE_VOLUME_OFFLINE 1 /* Set if volume offline notice given */ 603 #define AFS_SE_VOLUME_BUSY 2 /* Set if volume busy notice given */ 604 }; 605 606 struct afs_server_list { 607 struct rcu_head rcu; 608 refcount_t usage; 609 bool attached; /* T if attached to servers */ 610 enum afs_ro_replicating ro_replicating; /* RW->RO update (probably) in progress */ 611 unsigned char nr_servers; 612 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ 613 unsigned int seq; /* Set to ->servers_seq when installed */ 614 rwlock_t lock; 615 struct afs_server_entry servers[]; 616 }; 617 618 /* 619 * Live AFS volume management. 620 */ 621 struct afs_volume { 622 struct rcu_head rcu; 623 afs_volid_t vid; /* The volume ID of this volume */ 624 afs_volid_t vids[AFS_MAXTYPES]; /* All associated volume IDs */ 625 refcount_t ref; 626 unsigned int debug_id; /* Debugging ID for traces */ 627 time64_t update_at; /* Time at which to next update */ 628 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 629 struct rb_node cell_node; /* Link in cell->volumes */ 630 struct hlist_node proc_link; /* Link in cell->proc_volumes */ 631 struct super_block __rcu *sb; /* Superblock on which inodes reside */ 632 struct work_struct destructor; /* Deferred destructor */ 633 unsigned long flags; 634 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ 635 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ 636 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ 637 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ 638 #define AFS_VOLUME_MAYBE_NO_IBULK 4 /* - T if some servers don't have InlineBulkStatus */ 639 #define AFS_VOLUME_RM_TREE 5 /* - Set if volume removed from cell->volumes */ 640 #ifdef CONFIG_AFS_FSCACHE 641 struct fscache_volume *cache; /* Caching cookie */ 642 #endif 643 struct afs_server_list __rcu *servers; /* List of servers on which volume resides */ 644 rwlock_t servers_lock; /* Lock for ->servers */ 645 unsigned int servers_seq; /* Incremented each time ->servers changes */ 646 647 /* RO release tracking */ 648 struct mutex volsync_lock; /* Time/state evaluation lock */ 649 time64_t creation_time; /* Volume creation time (or TIME64_MIN) */ 650 time64_t update_time; /* Volume update time (or TIME64_MIN) */ 651 652 /* Callback management */ 653 struct mutex cb_check_lock; /* Lock to control race to check after v_break */ 654 time64_t cb_expires_at; /* Earliest volume callback expiry time */ 655 atomic_t cb_ro_snapshot; /* RO volume update-from-snapshot counter */ 656 atomic_t cb_v_break; /* Volume-break event counter. */ 657 atomic_t cb_v_check; /* Volume-break has-been-checked counter. */ 658 atomic_t cb_scrub; /* Scrub-all-data event counter. */ 659 rwlock_t cb_v_break_lock; 660 struct rw_semaphore open_mmaps_lock; 661 struct list_head open_mmaps; /* List of vnodes that are mmapped */ 662 663 afs_voltype_t type; /* type of volume */ 664 char type_force; /* force volume type (suppress R/O -> R/W) */ 665 u8 name_len; 666 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 667 }; 668 669 enum afs_lock_state { 670 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ 671 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ 672 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ 673 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ 674 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ 675 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ 676 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ 677 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */ 678 }; 679 680 /* 681 * AFS inode private data. 682 * 683 * Note that afs_alloc_inode() *must* reset anything that could incorrectly 684 * leak from one inode to another. 685 */ 686 struct afs_vnode { 687 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 688 struct afs_volume *volume; /* volume on which vnode resides */ 689 struct afs_fid fid; /* the file identifier for this inode */ 690 struct afs_file_status status; /* AFS status info for this file */ 691 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ 692 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ 693 struct list_head io_lock_waiters; /* Threads waiting for the I/O lock */ 694 struct rw_semaphore validate_lock; /* lock for validating this vnode */ 695 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ 696 struct key *silly_key; /* Silly rename key */ 697 spinlock_t wb_lock; /* lock for wb_keys */ 698 spinlock_t lock; /* waitqueue/flags lock */ 699 unsigned long flags; 700 #define AFS_VNODE_IO_LOCK 0 /* Set if the I/O serialisation lock is held */ 701 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 702 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ 703 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 704 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 705 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 706 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ 707 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ 708 #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */ 709 #define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */ 710 #define AFS_VNODE_DIR_READ 11 /* Set if we've read a dir's contents */ 711 712 struct folio_queue *directory; /* Directory contents */ 713 struct list_head wb_keys; /* List of keys available for writeback */ 714 struct list_head pending_locks; /* locks waiting to be granted */ 715 struct list_head granted_locks; /* locks granted on this file */ 716 struct delayed_work lock_work; /* work to be done in locking */ 717 struct key *lock_key; /* Key to be used in lock ops */ 718 ktime_t locked_at; /* Time at which lock obtained */ 719 enum afs_lock_state lock_state : 8; 720 afs_lock_type_t lock_type : 8; 721 unsigned int directory_size; /* Amount of space in ->directory */ 722 723 /* outstanding callback notification on this file */ 724 struct work_struct cb_work; /* Work for mmap'd files */ 725 struct list_head cb_mmap_link; /* Link in cell->fs_open_mmaps */ 726 void *cb_server; /* Server with callback/filelock */ 727 atomic_t cb_nr_mmap; /* Number of mmaps */ 728 unsigned int cb_ro_snapshot; /* RO volume release counter on ->volume */ 729 unsigned int cb_scrub; /* Scrub counter on ->volume */ 730 unsigned int cb_break; /* Break counter on vnode */ 731 unsigned int cb_v_check; /* Break check counter on ->volume */ 732 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ 733 734 atomic64_t cb_expires_at; /* time at which callback expires */ 735 #define AFS_NO_CB_PROMISE TIME64_MIN 736 }; 737 738 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) 739 { 740 #ifdef CONFIG_AFS_FSCACHE 741 return netfs_i_cookie(&vnode->netfs); 742 #else 743 return NULL; 744 #endif 745 } 746 747 static inline void afs_vnode_set_cache(struct afs_vnode *vnode, 748 struct fscache_cookie *cookie) 749 { 750 #ifdef CONFIG_AFS_FSCACHE 751 vnode->netfs.cache = cookie; 752 if (cookie) 753 mapping_set_release_always(vnode->netfs.inode.i_mapping); 754 #endif 755 } 756 757 /* 758 * cached security record for one user's attempt to access a vnode 759 */ 760 struct afs_permit { 761 struct key *key; /* RxRPC ticket holding a security context */ 762 afs_access_t access; /* CallerAccess value for this key */ 763 }; 764 765 /* 766 * Immutable cache of CallerAccess records from attempts to access vnodes. 767 * These may be shared between multiple vnodes. 768 */ 769 struct afs_permits { 770 struct rcu_head rcu; 771 struct hlist_node hash_node; /* Link in hash */ 772 unsigned long h; /* Hash value for this permit list */ 773 refcount_t usage; 774 unsigned short nr_permits; /* Number of records */ 775 bool invalidated; /* Invalidated due to key change */ 776 struct afs_permit permits[] __counted_by(nr_permits); /* List of permits sorted by key pointer */ 777 }; 778 779 /* 780 * Error prioritisation and accumulation. 781 */ 782 struct afs_error { 783 s32 abort_code; /* Cumulative abort code */ 784 short error; /* Cumulative error */ 785 bool responded; /* T if server responded */ 786 bool aborted; /* T if ->error is from an abort */ 787 }; 788 789 /* 790 * Cursor for iterating over a set of volume location servers. 791 */ 792 struct afs_vl_cursor { 793 struct afs_cell *cell; /* The cell we're querying */ 794 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ 795 struct afs_vlserver *server; /* Server on which this resides */ 796 struct afs_addr_list *alist; /* Current address list (pins ref) */ 797 struct key *key; /* Key for the server */ 798 unsigned long untried_servers; /* Bitmask of untried servers */ 799 unsigned long addr_tried; /* Tried addresses */ 800 struct afs_error cumul_error; /* Cumulative error */ 801 unsigned int debug_id; 802 s32 call_abort_code; 803 short call_error; /* Error from single call */ 804 short server_index; /* Current server */ 805 signed char addr_index; /* Current address */ 806 unsigned short flags; 807 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ 808 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ 809 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ 810 short nr_iterations; /* Number of server iterations */ 811 bool call_responded; /* T if the current address responded */ 812 }; 813 814 /* 815 * Fileserver state tracking for an operation. An array of these is kept, 816 * indexed by server index. 817 */ 818 struct afs_server_state { 819 /* Tracking of fileserver probe state. Other operations may interfere 820 * by probing a fileserver when accessing other volumes. 821 */ 822 unsigned int probe_seq; 823 unsigned long untried_addrs; /* Addresses we haven't tried yet */ 824 struct wait_queue_entry probe_waiter; 825 struct afs_endpoint_state *endpoint_state; /* Endpoint state being monitored */ 826 }; 827 828 /* 829 * Fileserver operation methods. 830 */ 831 struct afs_operation_ops { 832 void (*issue_afs_rpc)(struct afs_operation *op); 833 void (*issue_yfs_rpc)(struct afs_operation *op); 834 void (*success)(struct afs_operation *op); 835 void (*aborted)(struct afs_operation *op); 836 void (*failed)(struct afs_operation *op); 837 void (*edit_dir)(struct afs_operation *op); 838 void (*put)(struct afs_operation *op); 839 }; 840 841 struct afs_vnode_param { 842 struct afs_vnode *vnode; 843 struct afs_fid fid; /* Fid to access */ 844 struct afs_status_cb scb; /* Returned status and callback promise */ 845 afs_dataversion_t dv_before; /* Data version before the call */ 846 unsigned int cb_break_before; /* cb_break before the call */ 847 u8 dv_delta; /* Expected change in data version */ 848 bool put_vnode:1; /* T if we have a ref on the vnode */ 849 bool need_io_lock:1; /* T if we need the I/O lock on this */ 850 bool update_ctime:1; /* Need to update the ctime */ 851 bool set_size:1; /* Must update i_size */ 852 bool op_unlinked:1; /* True if file was unlinked by op */ 853 bool speculative:1; /* T if speculative status fetch (no vnode lock) */ 854 bool modification:1; /* Set if the content gets modified */ 855 }; 856 857 /* 858 * Fileserver operation wrapper, handling server and address rotation 859 * asynchronously. May make simultaneous calls to multiple servers. 860 */ 861 struct afs_operation { 862 struct afs_net *net; /* Network namespace */ 863 struct key *key; /* Key for the cell */ 864 const struct afs_call_type *type; /* Type of call done */ 865 const struct afs_operation_ops *ops; 866 867 /* Parameters/results for the operation */ 868 struct afs_volume *volume; /* Volume being accessed */ 869 struct afs_vnode_param file[2]; 870 struct afs_vnode_param *more_files; 871 struct afs_volsync pre_volsync; /* Volsync before op */ 872 struct afs_volsync volsync; /* Volsync returned by op */ 873 struct dentry *dentry; /* Dentry to be altered */ 874 struct dentry *dentry_2; /* Second dentry to be altered */ 875 struct timespec64 mtime; /* Modification time to record */ 876 struct timespec64 ctime; /* Change time to set */ 877 struct afs_error cumul_error; /* Cumulative error */ 878 short nr_files; /* Number of entries in file[], more_files */ 879 unsigned int debug_id; 880 881 unsigned int cb_v_break; /* Volume break counter before op */ 882 883 union { 884 struct { 885 int which; /* Which ->file[] to fetch for */ 886 } fetch_status; 887 struct { 888 int reason; /* enum afs_edit_dir_reason */ 889 mode_t mode; 890 const char *symlink; 891 } create; 892 struct { 893 bool need_rehash; 894 } unlink; 895 struct { 896 struct dentry *rehash; 897 struct dentry *tmp; 898 unsigned int rename_flags; 899 bool new_negative; 900 } rename; 901 struct { 902 struct netfs_io_subrequest *subreq; 903 } fetch; 904 struct { 905 afs_lock_type_t type; 906 } lock; 907 struct { 908 struct iov_iter *write_iter; 909 loff_t pos; 910 loff_t size; 911 loff_t i_size; 912 } store; 913 struct { 914 struct iattr *attr; 915 loff_t old_i_size; 916 } setattr; 917 struct afs_acl *acl; 918 struct yfs_acl *yacl; 919 struct { 920 struct afs_volume_status vs; 921 struct kstatfs *buf; 922 } volstatus; 923 }; 924 925 /* Fileserver iteration state */ 926 struct afs_server_list *server_list; /* Current server list (pins ref) */ 927 struct afs_server *server; /* Server we're using (ref pinned by server_list) */ 928 struct afs_endpoint_state *estate; /* Current endpoint state (doesn't pin ref) */ 929 struct afs_server_state *server_states; /* States of the servers involved */ 930 struct afs_call *call; 931 unsigned long untried_servers; /* Bitmask of untried servers */ 932 unsigned long addr_tried; /* Tried addresses */ 933 s32 call_abort_code; /* Abort code from single call */ 934 short call_error; /* Error from single call */ 935 short server_index; /* Current server */ 936 short nr_iterations; /* Number of server iterations */ 937 signed char addr_index; /* Current address */ 938 bool call_responded; /* T if the current address responded */ 939 940 unsigned int flags; 941 #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ 942 #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ 943 #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ 944 #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ 945 #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ 946 #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ 947 #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ 948 #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ 949 #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ 950 #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ 951 #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ 952 #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ 953 #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ 954 #define AFS_OPERATION_ASYNC 0x2000 /* Set if should run asynchronously */ 955 }; 956 957 /* 958 * Cache auxiliary data. 959 */ 960 struct afs_vnode_cache_aux { 961 __be64 data_version; 962 } __packed; 963 964 static inline void afs_set_cache_aux(struct afs_vnode *vnode, 965 struct afs_vnode_cache_aux *aux) 966 { 967 aux->data_version = cpu_to_be64(vnode->status.data_version); 968 } 969 970 static inline void afs_invalidate_cache(struct afs_vnode *vnode, unsigned int flags) 971 { 972 struct afs_vnode_cache_aux aux; 973 974 afs_set_cache_aux(vnode, &aux); 975 fscache_invalidate(afs_vnode_cache(vnode), &aux, 976 i_size_read(&vnode->netfs.inode), flags); 977 } 978 979 /* 980 * Directory iteration management. 981 */ 982 struct afs_dir_iter { 983 struct afs_vnode *dvnode; 984 union afs_xdr_dir_block *block; 985 struct folio_queue *fq; 986 unsigned int fpos; 987 int fq_slot; 988 unsigned int loop_check; 989 u8 nr_slots; 990 u8 bucket; 991 unsigned int prev_entry; 992 }; 993 994 #include <trace/events/afs.h> 995 996 /*****************************************************************************/ 997 /* 998 * addr_list.c 999 */ 1000 struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist, enum afs_alist_trace reason); 1001 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int nr); 1002 extern void afs_put_addrlist(struct afs_addr_list *alist, enum afs_alist_trace reason); 1003 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, 1004 const char *, size_t, char, 1005 unsigned short, unsigned short); 1006 bool afs_addr_list_same(const struct afs_addr_list *a, 1007 const struct afs_addr_list *b); 1008 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); 1009 1010 extern int afs_merge_fs_addr4(struct afs_net *net, struct afs_addr_list *addr, 1011 __be32 xdr, u16 port); 1012 extern int afs_merge_fs_addr6(struct afs_net *net, struct afs_addr_list *addr, 1013 __be32 *xdr, u16 port); 1014 void afs_set_peer_appdata(struct afs_server *server, 1015 struct afs_addr_list *old_alist, 1016 struct afs_addr_list *new_alist); 1017 1018 /* 1019 * addr_prefs.c 1020 */ 1021 int afs_proc_addr_prefs_write(struct file *file, char *buf, size_t size); 1022 void afs_get_address_preferences_rcu(struct afs_net *net, struct afs_addr_list *alist); 1023 void afs_get_address_preferences(struct afs_net *net, struct afs_addr_list *alist); 1024 1025 /* 1026 * callback.c 1027 */ 1028 extern void afs_invalidate_mmap_work(struct work_struct *); 1029 extern void afs_init_callback_state(struct afs_server *); 1030 extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 1031 extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 1032 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); 1033 1034 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) 1035 { 1036 return vnode->cb_break + vnode->cb_ro_snapshot + vnode->cb_scrub; 1037 } 1038 1039 static inline bool afs_cb_is_broken(unsigned int cb_break, 1040 const struct afs_vnode *vnode) 1041 { 1042 return cb_break != (vnode->cb_break + 1043 atomic_read(&vnode->volume->cb_ro_snapshot) + 1044 atomic_read(&vnode->volume->cb_scrub)); 1045 } 1046 1047 /* 1048 * cell.c 1049 */ 1050 extern int afs_cell_init(struct afs_net *, const char *); 1051 extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, 1052 enum afs_cell_trace); 1053 enum afs_lookup_cell_for { 1054 AFS_LOOKUP_CELL_DYNROOT, 1055 AFS_LOOKUP_CELL_MOUNTPOINT, 1056 AFS_LOOKUP_CELL_DIRECT_MOUNT, 1057 AFS_LOOKUP_CELL_PRELOAD, 1058 AFS_LOOKUP_CELL_ROOTCELL, 1059 AFS_LOOKUP_CELL_ALIAS_CHECK, 1060 }; 1061 struct afs_cell *afs_lookup_cell(struct afs_net *net, 1062 const char *name, unsigned int namesz, 1063 const char *vllist, 1064 enum afs_lookup_cell_for reason, 1065 enum afs_cell_trace trace); 1066 extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); 1067 void afs_unuse_cell(struct afs_cell *cell, enum afs_cell_trace reason); 1068 extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); 1069 extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); 1070 extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); 1071 extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); 1072 void afs_set_cell_timer(struct afs_cell *cell, unsigned int delay_secs); 1073 extern void __net_exit afs_cell_purge(struct afs_net *); 1074 1075 /* 1076 * cmservice.c 1077 */ 1078 extern bool afs_cm_incoming_call(struct afs_call *); 1079 1080 /* 1081 * cm_security.c 1082 */ 1083 void afs_process_oob_queue(struct work_struct *work); 1084 #ifdef CONFIG_RXGK 1085 int afs_create_token_key(struct afs_net *net, struct socket *socket); 1086 #else 1087 static inline int afs_create_token_key(struct afs_net *net, struct socket *socket) 1088 { 1089 return 0; 1090 } 1091 #endif 1092 1093 /* 1094 * dir.c 1095 */ 1096 extern const struct file_operations afs_dir_file_operations; 1097 extern const struct inode_operations afs_dir_inode_operations; 1098 extern const struct address_space_operations afs_dir_aops; 1099 extern const struct dentry_operations afs_fs_dentry_operations; 1100 1101 ssize_t afs_read_single(struct afs_vnode *dvnode, struct file *file); 1102 ssize_t afs_read_dir(struct afs_vnode *dvnode, struct file *file) 1103 __acquires(&dvnode->validate_lock); 1104 extern void afs_d_release(struct dentry *); 1105 extern void afs_check_for_remote_deletion(struct afs_operation *); 1106 int afs_single_writepages(struct address_space *mapping, 1107 struct writeback_control *wbc); 1108 1109 /* 1110 * dir_edit.c 1111 */ 1112 extern void afs_edit_dir_add(struct afs_vnode *, const struct qstr *, struct afs_fid *, 1113 enum afs_edit_dir_reason); 1114 extern void afs_edit_dir_remove(struct afs_vnode *, const struct qstr *, enum afs_edit_dir_reason); 1115 void afs_edit_dir_update(struct afs_vnode *vnode, const struct qstr *name, 1116 struct afs_vnode *new_dvnode, enum afs_edit_dir_reason why); 1117 void afs_mkdir_init_dir(struct afs_vnode *dvnode, struct afs_vnode *parent_vnode); 1118 1119 /* 1120 * dir_search.c 1121 */ 1122 unsigned int afs_dir_hash_name(const struct qstr *name); 1123 bool afs_dir_init_iter(struct afs_dir_iter *iter, const struct qstr *name); 1124 union afs_xdr_dir_block *afs_dir_find_block(struct afs_dir_iter *iter, size_t block); 1125 int afs_dir_search_bucket(struct afs_dir_iter *iter, const struct qstr *name, 1126 struct afs_fid *_fid); 1127 int afs_dir_search(struct afs_vnode *dvnode, const struct qstr *name, 1128 struct afs_fid *_fid, afs_dataversion_t *_dir_version); 1129 1130 /* 1131 * dir_silly.c 1132 */ 1133 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, 1134 struct dentry *, struct key *); 1135 extern int afs_silly_iput(struct dentry *, struct inode *); 1136 1137 /* 1138 * dynroot.c 1139 */ 1140 extern const struct inode_operations afs_dynroot_inode_operations; 1141 extern const struct dentry_operations afs_dynroot_dentry_operations; 1142 1143 struct inode *afs_dynroot_iget_root(struct super_block *sb); 1144 1145 /* 1146 * file.c 1147 */ 1148 extern const struct address_space_operations afs_file_aops; 1149 extern const struct inode_operations afs_file_inode_operations; 1150 extern const struct file_operations afs_file_operations; 1151 extern const struct afs_operation_ops afs_fetch_data_operation; 1152 extern const struct netfs_request_ops afs_req_ops; 1153 1154 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); 1155 extern void afs_put_wb_key(struct afs_wb_key *); 1156 extern int afs_open(struct inode *, struct file *); 1157 extern int afs_release(struct inode *, struct file *); 1158 void afs_fetch_data_async_rx(struct work_struct *work); 1159 void afs_fetch_data_immediate_cancel(struct afs_call *call); 1160 1161 /* 1162 * flock.c 1163 */ 1164 extern struct workqueue_struct *afs_lock_manager; 1165 1166 extern void afs_lock_op_done(struct afs_call *); 1167 extern void afs_lock_work(struct work_struct *); 1168 extern void afs_lock_may_be_available(struct afs_vnode *); 1169 extern int afs_lock(struct file *, int, struct file_lock *); 1170 extern int afs_flock(struct file *, int, struct file_lock *); 1171 1172 /* 1173 * fsclient.c 1174 */ 1175 extern void afs_fs_fetch_status(struct afs_operation *); 1176 extern void afs_fs_fetch_data(struct afs_operation *); 1177 extern void afs_fs_create_file(struct afs_operation *); 1178 extern void afs_fs_make_dir(struct afs_operation *); 1179 extern void afs_fs_remove_file(struct afs_operation *); 1180 extern void afs_fs_remove_dir(struct afs_operation *); 1181 extern void afs_fs_link(struct afs_operation *); 1182 extern void afs_fs_symlink(struct afs_operation *); 1183 extern void afs_fs_rename(struct afs_operation *); 1184 extern void afs_fs_store_data(struct afs_operation *); 1185 extern void afs_fs_setattr(struct afs_operation *); 1186 extern void afs_fs_get_volume_status(struct afs_operation *); 1187 extern void afs_fs_set_lock(struct afs_operation *); 1188 extern void afs_fs_extend_lock(struct afs_operation *); 1189 extern void afs_fs_release_lock(struct afs_operation *); 1190 int afs_fs_give_up_all_callbacks(struct afs_net *net, struct afs_server *server, 1191 struct afs_address *addr, struct key *key); 1192 bool afs_fs_get_capabilities(struct afs_net *net, struct afs_server *server, 1193 struct afs_endpoint_state *estate, unsigned int addr_index, 1194 struct key *key); 1195 extern void afs_fs_inline_bulk_status(struct afs_operation *); 1196 1197 struct afs_acl { 1198 u32 size; 1199 u8 data[] __counted_by(size); 1200 }; 1201 1202 extern void afs_fs_fetch_acl(struct afs_operation *); 1203 extern void afs_fs_store_acl(struct afs_operation *); 1204 1205 /* 1206 * fs_operation.c 1207 */ 1208 extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); 1209 extern int afs_put_operation(struct afs_operation *); 1210 extern bool afs_begin_vnode_operation(struct afs_operation *); 1211 extern void afs_end_vnode_operation(struct afs_operation *op); 1212 extern void afs_wait_for_operation(struct afs_operation *); 1213 extern int afs_do_sync_operation(struct afs_operation *); 1214 1215 static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, 1216 struct afs_vnode *vnode) 1217 { 1218 op->file[n].vnode = vnode; 1219 op->file[n].need_io_lock = true; 1220 } 1221 1222 static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, 1223 const struct afs_fid *fid) 1224 { 1225 op->file[n].fid = *fid; 1226 } 1227 1228 /* 1229 * fs_probe.c 1230 */ 1231 struct afs_endpoint_state *afs_get_endpoint_state(struct afs_endpoint_state *estate, 1232 enum afs_estate_trace where); 1233 void afs_put_endpoint_state(struct afs_endpoint_state *estate, enum afs_estate_trace where); 1234 extern void afs_fileserver_probe_result(struct afs_call *); 1235 int afs_fs_probe_fileserver(struct afs_net *net, struct afs_server *server, 1236 struct afs_addr_list *new_alist, struct key *key); 1237 int afs_wait_for_fs_probes(struct afs_operation *op, struct afs_server_state *states, bool intr); 1238 extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); 1239 extern void afs_fs_probe_dispatcher(struct work_struct *); 1240 int afs_wait_for_one_fs_probe(struct afs_server *server, struct afs_endpoint_state *estate, 1241 unsigned long exclude, bool is_intr); 1242 extern void afs_fs_probe_cleanup(struct afs_net *); 1243 1244 /* 1245 * inode.c 1246 */ 1247 extern const struct afs_operation_ops afs_fetch_status_operation; 1248 1249 void afs_init_new_symlink(struct afs_vnode *vnode, struct afs_operation *op); 1250 const char *afs_get_link(struct dentry *dentry, struct inode *inode, 1251 struct delayed_call *callback); 1252 int afs_readlink(struct dentry *dentry, char __user *buffer, int buflen); 1253 extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); 1254 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); 1255 extern int afs_ilookup5_test_by_fid(struct inode *, void *); 1256 extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); 1257 extern struct inode *afs_root_iget(struct super_block *, struct key *); 1258 extern int afs_getattr(struct mnt_idmap *idmap, const struct path *, 1259 struct kstat *, u32, unsigned int); 1260 extern int afs_setattr(struct mnt_idmap *idmap, struct dentry *, struct iattr *); 1261 extern void afs_evict_inode(struct inode *); 1262 extern int afs_drop_inode(struct inode *); 1263 1264 /* 1265 * main.c 1266 */ 1267 extern struct workqueue_struct *afs_wq; 1268 extern int afs_net_id; 1269 1270 static inline struct afs_net *afs_net(struct net *net) 1271 { 1272 return net_generic(net, afs_net_id); 1273 } 1274 1275 static inline struct afs_net *afs_sb2net(struct super_block *sb) 1276 { 1277 return afs_net(AFS_FS_S(sb)->net_ns); 1278 } 1279 1280 static inline struct afs_net *afs_d2net(struct dentry *dentry) 1281 { 1282 return afs_sb2net(dentry->d_sb); 1283 } 1284 1285 static inline struct afs_net *afs_i2net(struct inode *inode) 1286 { 1287 return afs_sb2net(inode->i_sb); 1288 } 1289 1290 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 1291 { 1292 return afs_i2net(&vnode->netfs.inode); 1293 } 1294 1295 static inline struct afs_net *afs_sock2net(struct sock *sk) 1296 { 1297 return net_generic(sock_net(sk), afs_net_id); 1298 } 1299 1300 static inline void __afs_stat(atomic_t *s) 1301 { 1302 atomic_inc(s); 1303 } 1304 1305 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) 1306 1307 /* 1308 * misc.c 1309 */ 1310 extern int afs_abort_to_error(u32); 1311 extern void afs_prioritise_error(struct afs_error *, int, u32); 1312 1313 static inline void afs_op_nomem(struct afs_operation *op) 1314 { 1315 op->cumul_error.error = -ENOMEM; 1316 } 1317 1318 static inline int afs_op_error(const struct afs_operation *op) 1319 { 1320 return op->cumul_error.error; 1321 } 1322 1323 static inline s32 afs_op_abort_code(const struct afs_operation *op) 1324 { 1325 return op->cumul_error.abort_code; 1326 } 1327 1328 static inline int afs_op_set_error(struct afs_operation *op, int error) 1329 { 1330 return op->cumul_error.error = error; 1331 } 1332 1333 static inline void afs_op_accumulate_error(struct afs_operation *op, int error, s32 abort_code) 1334 { 1335 afs_prioritise_error(&op->cumul_error, error, abort_code); 1336 } 1337 1338 /* 1339 * mntpt.c 1340 */ 1341 extern const struct inode_operations afs_mntpt_inode_operations; 1342 extern const struct inode_operations afs_autocell_inode_operations; 1343 extern const struct file_operations afs_mntpt_file_operations; 1344 1345 extern struct vfsmount *afs_d_automount(struct path *); 1346 extern void afs_mntpt_kill_timer(void); 1347 1348 /* 1349 * proc.c 1350 */ 1351 #ifdef CONFIG_PROC_FS 1352 extern int __net_init afs_proc_init(struct afs_net *); 1353 extern void __net_exit afs_proc_cleanup(struct afs_net *); 1354 extern int afs_proc_cell_setup(struct afs_cell *); 1355 extern void afs_proc_cell_remove(struct afs_cell *); 1356 extern void afs_put_sysnames(struct afs_sysnames *); 1357 #else 1358 static inline int afs_proc_init(struct afs_net *net) { return 0; } 1359 static inline void afs_proc_cleanup(struct afs_net *net) {} 1360 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } 1361 static inline void afs_proc_cell_remove(struct afs_cell *cell) {} 1362 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} 1363 #endif 1364 1365 /* 1366 * rotate.c 1367 */ 1368 void afs_clear_server_states(struct afs_operation *op); 1369 extern bool afs_select_fileserver(struct afs_operation *); 1370 extern void afs_dump_edestaddrreq(const struct afs_operation *); 1371 1372 /* 1373 * rxrpc.c 1374 */ 1375 extern struct workqueue_struct *afs_async_calls; 1376 1377 extern int __net_init afs_open_socket(struct afs_net *); 1378 extern void __net_exit afs_close_socket(struct afs_net *); 1379 extern void afs_charge_preallocation(struct work_struct *); 1380 extern void afs_put_call(struct afs_call *); 1381 void afs_deferred_put_call(struct afs_call *call); 1382 void afs_make_call(struct afs_call *call, gfp_t gfp); 1383 void afs_deliver_to_call(struct afs_call *call); 1384 void afs_wait_for_call_to_complete(struct afs_call *call); 1385 extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 1386 const struct afs_call_type *, 1387 size_t, size_t); 1388 extern void afs_flat_call_destructor(struct afs_call *); 1389 extern void afs_send_empty_reply(struct afs_call *); 1390 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 1391 extern int afs_extract_data(struct afs_call *, bool); 1392 extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); 1393 1394 static inline struct afs_call *afs_get_call(struct afs_call *call, 1395 enum afs_call_trace why) 1396 { 1397 int r; 1398 1399 __refcount_inc(&call->ref, &r); 1400 1401 trace_afs_call(call->debug_id, why, r + 1, 1402 atomic_read(&call->net->nr_outstanding_calls), 1403 __builtin_return_address(0)); 1404 return call; 1405 } 1406 1407 static inline void afs_see_call(struct afs_call *call, enum afs_call_trace why) 1408 { 1409 int r = refcount_read(&call->ref); 1410 1411 trace_afs_call(call->debug_id, why, r, 1412 atomic_read(&call->net->nr_outstanding_calls), 1413 __builtin_return_address(0)); 1414 } 1415 1416 static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, 1417 gfp_t gfp) 1418 { 1419 struct afs_addr_list *alist = op->estate->addresses; 1420 1421 op->call = call; 1422 op->type = call->type; 1423 call->op = op; 1424 call->key = op->key; 1425 call->intr = !(op->flags & AFS_OPERATION_UNINTR); 1426 call->peer = rxrpc_kernel_get_peer(alist->addrs[op->addr_index].peer); 1427 call->service_id = op->server->service_id; 1428 afs_make_call(call, gfp); 1429 } 1430 1431 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) 1432 { 1433 call->iov_len = size; 1434 call->kvec[0].iov_base = buf; 1435 call->kvec[0].iov_len = size; 1436 iov_iter_kvec(&call->def_iter, ITER_DEST, call->kvec, 1, size); 1437 } 1438 1439 static inline void afs_extract_to_tmp(struct afs_call *call) 1440 { 1441 call->iov_len = sizeof(call->tmp); 1442 afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); 1443 } 1444 1445 static inline void afs_extract_to_tmp64(struct afs_call *call) 1446 { 1447 call->iov_len = sizeof(call->tmp64); 1448 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); 1449 } 1450 1451 static inline void afs_extract_discard(struct afs_call *call, size_t size) 1452 { 1453 call->iov_len = size; 1454 iov_iter_discard(&call->def_iter, ITER_DEST, size); 1455 } 1456 1457 static inline void afs_extract_to_buf(struct afs_call *call, size_t size) 1458 { 1459 call->iov_len = size; 1460 afs_extract_begin(call, call->buffer, size); 1461 } 1462 1463 static inline int afs_transfer_reply(struct afs_call *call) 1464 { 1465 return afs_extract_data(call, false); 1466 } 1467 1468 static inline bool afs_check_call_state(struct afs_call *call, 1469 enum afs_call_state state) 1470 { 1471 return READ_ONCE(call->state) == state; 1472 } 1473 1474 static inline bool afs_set_call_state(struct afs_call *call, 1475 enum afs_call_state from, 1476 enum afs_call_state to) 1477 { 1478 bool ok = false; 1479 1480 spin_lock_bh(&call->state_lock); 1481 if (call->state == from) { 1482 call->state = to; 1483 trace_afs_call_state(call, from, to, 0, 0); 1484 ok = true; 1485 } 1486 spin_unlock_bh(&call->state_lock); 1487 return ok; 1488 } 1489 1490 static inline void afs_set_call_complete(struct afs_call *call, 1491 int error, u32 remote_abort) 1492 { 1493 enum afs_call_state state; 1494 bool ok = false; 1495 1496 spin_lock_bh(&call->state_lock); 1497 state = call->state; 1498 if (state != AFS_CALL_COMPLETE) { 1499 call->abort_code = remote_abort; 1500 call->error = error; 1501 call->state = AFS_CALL_COMPLETE; 1502 trace_afs_call_state(call, state, AFS_CALL_COMPLETE, 1503 error, remote_abort); 1504 ok = true; 1505 } 1506 spin_unlock_bh(&call->state_lock); 1507 if (ok) { 1508 trace_afs_call_done(call); 1509 1510 /* Asynchronous calls have two refs to release - one from the alloc and 1511 * one queued with the work item - and we can't just deallocate the 1512 * call because the work item may be queued again. 1513 */ 1514 if (call->drop_ref) 1515 afs_put_call(call); 1516 } 1517 } 1518 1519 /* 1520 * security.c 1521 */ 1522 extern void afs_put_permits(struct afs_permits *); 1523 extern void afs_clear_permits(struct afs_vnode *); 1524 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, 1525 struct afs_status_cb *); 1526 extern struct key *afs_request_key(struct afs_cell *); 1527 extern struct key *afs_request_key_rcu(struct afs_cell *); 1528 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); 1529 extern int afs_permission(struct mnt_idmap *, struct inode *, int); 1530 extern void __exit afs_clean_up_permit_cache(void); 1531 1532 /* 1533 * server.c 1534 */ 1535 extern spinlock_t afs_server_peer_lock; 1536 1537 struct afs_server *afs_find_server(const struct rxrpc_peer *peer); 1538 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); 1539 extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); 1540 struct afs_server *afs_use_server(struct afs_server *server, bool activate, 1541 enum afs_server_trace reason); 1542 void afs_unuse_server(struct afs_net *net, struct afs_server *server, 1543 enum afs_server_trace reason); 1544 void afs_unuse_server_notime(struct afs_net *net, struct afs_server *server, 1545 enum afs_server_trace reason); 1546 extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1547 void afs_purge_servers(struct afs_cell *cell); 1548 extern void afs_fs_probe_timer(struct timer_list *); 1549 void __net_exit afs_wait_for_servers(struct afs_net *net); 1550 bool afs_check_server_record(struct afs_operation *op, struct afs_server *server, struct key *key); 1551 1552 static inline void afs_see_server(struct afs_server *server, enum afs_server_trace trace) 1553 { 1554 int r = refcount_read(&server->ref); 1555 int a = atomic_read(&server->active); 1556 1557 trace_afs_server(server->debug_id, r, a, trace); 1558 1559 } 1560 1561 static inline void afs_inc_servers_outstanding(struct afs_net *net) 1562 { 1563 atomic_inc(&net->servers_outstanding); 1564 } 1565 1566 static inline void afs_dec_servers_outstanding(struct afs_net *net) 1567 { 1568 if (atomic_dec_and_test(&net->servers_outstanding)) 1569 wake_up_var(&net->servers_outstanding); 1570 } 1571 1572 static inline bool afs_is_probing_server(struct afs_server *server) 1573 { 1574 return list_empty(&server->probe_link); 1575 } 1576 1577 /* 1578 * server_list.c 1579 */ 1580 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) 1581 { 1582 refcount_inc(&slist->usage); 1583 return slist; 1584 } 1585 1586 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); 1587 struct afs_server_list *afs_alloc_server_list(struct afs_volume *volume, 1588 struct key *key, 1589 struct afs_vldb_entry *vldb); 1590 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); 1591 void afs_attach_volume_to_servers(struct afs_volume *volume, struct afs_server_list *slist); 1592 void afs_reattach_volume_to_servers(struct afs_volume *volume, struct afs_server_list *slist, 1593 struct afs_server_list *old); 1594 void afs_detach_volume_from_servers(struct afs_volume *volume, struct afs_server_list *slist); 1595 1596 /* 1597 * super.c 1598 */ 1599 extern int __init afs_fs_init(void); 1600 extern void afs_fs_exit(void); 1601 1602 /* 1603 * validation.c 1604 */ 1605 bool afs_check_validity(const struct afs_vnode *vnode); 1606 int afs_update_volume_state(struct afs_operation *op); 1607 int afs_validate(struct afs_vnode *vnode, struct key *key); 1608 1609 /* 1610 * vlclient.c 1611 */ 1612 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, 1613 const char *, int); 1614 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); 1615 struct afs_call *afs_vl_get_capabilities(struct afs_net *net, 1616 struct afs_addr_list *alist, 1617 unsigned int addr_index, 1618 struct key *key, 1619 struct afs_vlserver *server, 1620 unsigned int server_index); 1621 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); 1622 extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); 1623 1624 /* 1625 * vl_alias.c 1626 */ 1627 extern int afs_cell_detect_alias(struct afs_cell *, struct key *); 1628 1629 /* 1630 * vl_probe.c 1631 */ 1632 extern void afs_vlserver_probe_result(struct afs_call *); 1633 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); 1634 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); 1635 1636 /* 1637 * vl_rotate.c 1638 */ 1639 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, 1640 struct afs_cell *, struct key *); 1641 extern bool afs_select_vlserver(struct afs_vl_cursor *); 1642 extern bool afs_select_current_vlserver(struct afs_vl_cursor *); 1643 extern int afs_end_vlserver_operation(struct afs_vl_cursor *); 1644 1645 /* 1646 * vlserver_list.c 1647 */ 1648 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) 1649 { 1650 refcount_inc(&vlserver->ref); 1651 return vlserver; 1652 } 1653 1654 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) 1655 { 1656 if (vllist) 1657 refcount_inc(&vllist->ref); 1658 return vllist; 1659 } 1660 1661 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); 1662 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); 1663 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); 1664 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); 1665 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, 1666 const void *, size_t); 1667 1668 /* 1669 * volume.c 1670 */ 1671 extern struct afs_volume *afs_create_volume(struct afs_fs_context *); 1672 extern int afs_activate_volume(struct afs_volume *); 1673 extern void afs_deactivate_volume(struct afs_volume *); 1674 bool afs_try_get_volume(struct afs_volume *volume, enum afs_volume_trace reason); 1675 extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); 1676 void afs_put_volume(struct afs_volume *volume, enum afs_volume_trace reason); 1677 extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); 1678 1679 /* 1680 * write.c 1681 */ 1682 void afs_prepare_write(struct netfs_io_subrequest *subreq); 1683 void afs_issue_write(struct netfs_io_subrequest *subreq); 1684 void afs_begin_writeback(struct netfs_io_request *wreq); 1685 void afs_retry_request(struct netfs_io_request *wreq, struct netfs_io_stream *stream); 1686 extern int afs_writepages(struct address_space *, struct writeback_control *); 1687 extern int afs_fsync(struct file *, loff_t, loff_t, int); 1688 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); 1689 extern void afs_prune_wb_keys(struct afs_vnode *); 1690 1691 /* 1692 * xattr.c 1693 */ 1694 extern const struct xattr_handler * const afs_xattr_handlers[]; 1695 1696 /* 1697 * yfsclient.c 1698 */ 1699 extern void yfs_fs_fetch_data(struct afs_operation *); 1700 extern void yfs_fs_create_file(struct afs_operation *); 1701 extern void yfs_fs_make_dir(struct afs_operation *); 1702 extern void yfs_fs_remove_file2(struct afs_operation *); 1703 extern void yfs_fs_remove_file(struct afs_operation *); 1704 extern void yfs_fs_remove_dir(struct afs_operation *); 1705 extern void yfs_fs_link(struct afs_operation *); 1706 extern void yfs_fs_symlink(struct afs_operation *); 1707 extern void yfs_fs_rename(struct afs_operation *); 1708 void yfs_fs_rename_replace(struct afs_operation *op); 1709 void yfs_fs_rename_noreplace(struct afs_operation *op); 1710 void yfs_fs_rename_exchange(struct afs_operation *op); 1711 extern void yfs_fs_store_data(struct afs_operation *); 1712 extern void yfs_fs_setattr(struct afs_operation *); 1713 extern void yfs_fs_get_volume_status(struct afs_operation *); 1714 extern void yfs_fs_set_lock(struct afs_operation *); 1715 extern void yfs_fs_extend_lock(struct afs_operation *); 1716 extern void yfs_fs_release_lock(struct afs_operation *); 1717 extern void yfs_fs_fetch_status(struct afs_operation *); 1718 extern void yfs_fs_inline_bulk_status(struct afs_operation *); 1719 1720 struct yfs_acl { 1721 struct afs_acl *acl; /* Dir/file/symlink ACL */ 1722 struct afs_acl *vol_acl; /* Whole volume ACL */ 1723 u32 inherit_flag; /* True if ACL is inherited from parent dir */ 1724 u32 num_cleaned; /* Number of ACEs removed due to subject removal */ 1725 unsigned int flags; 1726 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ 1727 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ 1728 }; 1729 1730 extern void yfs_free_opaque_acl(struct yfs_acl *); 1731 extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); 1732 extern void yfs_fs_store_opaque_acl2(struct afs_operation *); 1733 1734 /* 1735 * Miscellaneous inline functions. 1736 */ 1737 static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 1738 { 1739 return container_of(inode, struct afs_vnode, netfs.inode); 1740 } 1741 1742 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 1743 { 1744 return &vnode->netfs.inode; 1745 } 1746 1747 /* 1748 * Note that a dentry got changed. We need to set d_fsdata to the data version 1749 * number derived from the result of the operation. It doesn't matter if 1750 * d_fsdata goes backwards as we'll just revalidate. 1751 */ 1752 static inline void afs_update_dentry_version(struct afs_operation *op, 1753 struct afs_vnode_param *dir_vp, 1754 struct dentry *dentry) 1755 { 1756 if (!op->cumul_error.error) 1757 dentry->d_fsdata = 1758 (void *)(unsigned long)dir_vp->scb.status.data_version; 1759 } 1760 1761 /* 1762 * Set the file size and block count. Estimate the number of 512 bytes blocks 1763 * used, rounded up to nearest 1K for consistency with other AFS clients. 1764 */ 1765 static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size) 1766 { 1767 i_size_write(&vnode->netfs.inode, size); 1768 vnode->netfs.inode.i_blocks = ((size + 1023) >> 10) << 1; 1769 } 1770 1771 /* 1772 * Check for a conflicting operation on a directory that we just unlinked from. 1773 * If someone managed to sneak a link or an unlink in on the file we just 1774 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). 1775 */ 1776 static inline void afs_check_dir_conflict(struct afs_operation *op, 1777 struct afs_vnode_param *dvp) 1778 { 1779 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) 1780 op->flags |= AFS_OPERATION_DIR_CONFLICT; 1781 } 1782 1783 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) 1784 { 1785 trace_afs_io_error(call->debug_id, -EIO, where); 1786 return -EIO; 1787 } 1788 1789 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) 1790 { 1791 trace_afs_file_error(vnode, -EIO, where); 1792 return -EIO; 1793 } 1794 1795 /* 1796 * Set the callback promise on a vnode. 1797 */ 1798 static inline void afs_set_cb_promise(struct afs_vnode *vnode, time64_t expires_at, 1799 enum afs_cb_promise_trace trace) 1800 { 1801 atomic64_set(&vnode->cb_expires_at, expires_at); 1802 trace_afs_cb_promise(vnode, trace); 1803 } 1804 1805 /* 1806 * Clear the callback promise on a vnode, returning true if it was promised. 1807 */ 1808 static inline bool afs_clear_cb_promise(struct afs_vnode *vnode, 1809 enum afs_cb_promise_trace trace) 1810 { 1811 trace_afs_cb_promise(vnode, trace); 1812 return atomic64_xchg(&vnode->cb_expires_at, AFS_NO_CB_PROMISE) != AFS_NO_CB_PROMISE; 1813 } 1814 1815 /* 1816 * Mark a directory as being invalid. 1817 */ 1818 static inline void afs_invalidate_dir(struct afs_vnode *dvnode, 1819 enum afs_dir_invalid_trace trace) 1820 { 1821 if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) { 1822 trace_afs_dir_invalid(dvnode, trace); 1823 afs_stat_v(dvnode, n_inval); 1824 } 1825 } 1826 1827 /*****************************************************************************/ 1828 /* 1829 * debug tracing 1830 */ 1831 extern unsigned afs_debug; 1832 1833 #define dbgprintk(FMT,...) \ 1834 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1835 1836 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1837 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1838 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1839 1840 1841 #if defined(__KDEBUG) 1842 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1843 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1844 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1845 1846 #elif defined(CONFIG_AFS_DEBUG) 1847 #define AFS_DEBUG_KENTER 0x01 1848 #define AFS_DEBUG_KLEAVE 0x02 1849 #define AFS_DEBUG_KDEBUG 0x04 1850 1851 #define _enter(FMT,...) \ 1852 do { \ 1853 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 1854 kenter(FMT,##__VA_ARGS__); \ 1855 } while (0) 1856 1857 #define _leave(FMT,...) \ 1858 do { \ 1859 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 1860 kleave(FMT,##__VA_ARGS__); \ 1861 } while (0) 1862 1863 #define _debug(FMT,...) \ 1864 do { \ 1865 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 1866 kdebug(FMT,##__VA_ARGS__); \ 1867 } while (0) 1868 1869 #else 1870 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1871 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1872 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1873 #endif 1874 1875 /* 1876 * debug assertion checking 1877 */ 1878 #if 1 // defined(__KDEBUGALL) 1879 1880 #define ASSERT(X) \ 1881 do { \ 1882 if (unlikely(!(X))) { \ 1883 printk(KERN_ERR "\n"); \ 1884 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1885 BUG(); \ 1886 } \ 1887 } while(0) 1888 1889 #define ASSERTCMP(X, OP, Y) \ 1890 do { \ 1891 if (unlikely(!((X) OP (Y)))) { \ 1892 printk(KERN_ERR "\n"); \ 1893 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1894 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1895 (unsigned long)(X), (unsigned long)(Y)); \ 1896 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1897 (unsigned long)(X), (unsigned long)(Y)); \ 1898 BUG(); \ 1899 } \ 1900 } while(0) 1901 1902 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1903 do { \ 1904 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 1905 printk(KERN_ERR "\n"); \ 1906 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1907 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 1908 (unsigned long)(L), (unsigned long)(N), \ 1909 (unsigned long)(H)); \ 1910 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 1911 (unsigned long)(L), (unsigned long)(N), \ 1912 (unsigned long)(H)); \ 1913 BUG(); \ 1914 } \ 1915 } while(0) 1916 1917 #define ASSERTIF(C, X) \ 1918 do { \ 1919 if (unlikely((C) && !(X))) { \ 1920 printk(KERN_ERR "\n"); \ 1921 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1922 BUG(); \ 1923 } \ 1924 } while(0) 1925 1926 #define ASSERTIFCMP(C, X, OP, Y) \ 1927 do { \ 1928 if (unlikely((C) && !((X) OP (Y)))) { \ 1929 printk(KERN_ERR "\n"); \ 1930 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1931 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1932 (unsigned long)(X), (unsigned long)(Y)); \ 1933 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1934 (unsigned long)(X), (unsigned long)(Y)); \ 1935 BUG(); \ 1936 } \ 1937 } while(0) 1938 1939 #else 1940 1941 #define ASSERT(X) \ 1942 do { \ 1943 } while(0) 1944 1945 #define ASSERTCMP(X, OP, Y) \ 1946 do { \ 1947 } while(0) 1948 1949 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1950 do { \ 1951 } while(0) 1952 1953 #define ASSERTIF(C, X) \ 1954 do { \ 1955 } while(0) 1956 1957 #define ASSERTIFCMP(C, X, OP, Y) \ 1958 do { \ 1959 } while(0) 1960 1961 #endif /* __KDEBUGALL */ 1962