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