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 <net/net_namespace.h> 24 #include <net/netns/generic.h> 25 #include <net/sock.h> 26 #include <net/af_rxrpc.h> 27 28 #include "afs.h" 29 #include "afs_vl.h" 30 31 #define AFS_CELL_MAX_ADDRS 15 32 33 struct pagevec; 34 struct afs_call; 35 struct afs_vnode; 36 struct afs_server_probe; 37 38 /* 39 * Partial file-locking emulation mode. (The problem being that AFS3 only 40 * allows whole-file locks and no upgrading/downgrading). 41 */ 42 enum afs_flock_mode { 43 afs_flock_mode_unset, 44 afs_flock_mode_local, /* Local locking only */ 45 afs_flock_mode_openafs, /* Don't get server lock for a partial lock */ 46 afs_flock_mode_strict, /* Always get a server lock for a partial lock */ 47 afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */ 48 }; 49 50 struct afs_fs_context { 51 bool force; /* T to force cell type */ 52 bool autocell; /* T if set auto mount operation */ 53 bool dyn_root; /* T if dynamic root */ 54 bool no_cell; /* T if the source is "none" (for dynroot) */ 55 enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */ 56 afs_voltype_t type; /* type of volume requested */ 57 unsigned int volnamesz; /* size of volume name */ 58 const char *volname; /* name of volume to mount */ 59 struct afs_net *net; /* the AFS net namespace stuff */ 60 struct afs_cell *cell; /* cell in which to find volume */ 61 struct afs_volume *volume; /* volume record */ 62 struct key *key; /* key to use for secure mounting */ 63 }; 64 65 enum afs_call_state { 66 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ 67 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ 68 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ 69 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ 70 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ 71 AFS_CALL_SV_REPLYING, /* Server: Replying */ 72 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ 73 AFS_CALL_COMPLETE, /* Completed or failed */ 74 }; 75 76 /* 77 * Address preferences. 78 */ 79 struct afs_addr_preference { 80 union { 81 struct in_addr ipv4_addr; /* AF_INET address to compare against */ 82 struct in6_addr ipv6_addr; /* AF_INET6 address to compare against */ 83 }; 84 sa_family_t family; /* Which address to use */ 85 u16 prio; /* Priority */ 86 u8 subnet_mask; /* How many bits to compare */ 87 }; 88 89 struct afs_addr_preference_list { 90 struct rcu_head rcu; 91 u16 version; /* Incremented when prefs list changes */ 92 u8 ipv6_off; /* Offset of IPv6 addresses */ 93 u8 nr; /* Number of addresses in total */ 94 u8 max_prefs; /* Number of prefs allocated */ 95 struct afs_addr_preference prefs[] __counted_by(max_prefs); 96 }; 97 98 struct afs_address { 99 struct rxrpc_peer *peer; 100 short last_error; /* Last error from this address */ 101 u16 prio; /* Address priority */ 102 }; 103 104 /* 105 * List of server addresses. 106 */ 107 struct afs_addr_list { 108 struct rcu_head rcu; 109 refcount_t usage; 110 u32 version; /* Version */ 111 unsigned int debug_id; 112 unsigned int addr_pref_version; /* Version of address preference list */ 113 unsigned char max_addrs; 114 unsigned char nr_addrs; 115 unsigned char preferred; /* Preferred address */ 116 unsigned char nr_ipv4; /* Number of IPv4 addresses */ 117 enum dns_record_source source:8; 118 enum dns_lookup_status status:8; 119 unsigned long probe_failed; /* Mask of addrs that failed locally/ICMP */ 120 unsigned long responded; /* Mask of addrs that responded */ 121 struct afs_address addrs[] __counted_by(max_addrs); 122 #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8)) 123 }; 124 125 /* 126 * a record of an in-progress RxRPC call 127 */ 128 struct afs_call { 129 const struct afs_call_type *type; /* type of call */ 130 wait_queue_head_t waitq; /* processes awaiting completion */ 131 struct work_struct async_work; /* async I/O processor */ 132 struct work_struct work; /* actual work processor */ 133 struct rxrpc_call *rxcall; /* RxRPC call handle */ 134 struct rxrpc_peer *peer; /* Remote endpoint */ 135 struct key *key; /* security for this call */ 136 struct afs_net *net; /* The network namespace */ 137 struct afs_server *server; /* The fileserver record if fs op (pins ref) */ 138 struct afs_vlserver *vlserver; /* The vlserver record if vl op */ 139 void *request; /* request data (first part) */ 140 size_t iov_len; /* Size of *iter to be used */ 141 struct iov_iter def_iter; /* Default buffer/data iterator */ 142 struct iov_iter *write_iter; /* Iterator defining write to be made */ 143 struct iov_iter *iter; /* Iterator currently in use */ 144 union { /* Convenience for ->def_iter */ 145 struct kvec kvec[1]; 146 struct bio_vec bvec[1]; 147 }; 148 void *buffer; /* reply receive buffer */ 149 union { 150 struct afs_endpoint_state *probe; 151 struct afs_addr_list *vl_probe; 152 struct afs_addr_list *ret_alist; 153 struct afs_vldb_entry *ret_vldb; 154 char *ret_str; 155 }; 156 struct afs_fid fid; /* Primary vnode ID (or all zeroes) */ 157 unsigned char probe_index; /* Address in ->probe_alist */ 158 struct afs_operation *op; 159 unsigned int server_index; 160 refcount_t ref; 161 enum afs_call_state state; 162 spinlock_t state_lock; 163 int error; /* error code */ 164 u32 abort_code; /* Remote abort ID or 0 */ 165 unsigned int max_lifespan; /* Maximum lifespan in secs to set if not 0 */ 166 unsigned request_size; /* size of request data */ 167 unsigned reply_max; /* maximum size of reply */ 168 unsigned count2; /* count used in unmarshalling */ 169 unsigned char unmarshall; /* unmarshalling phase */ 170 bool drop_ref; /* T if need to drop ref for incoming call */ 171 bool need_attention; /* T if RxRPC poked us */ 172 bool async; /* T if asynchronous */ 173 bool upgrade; /* T to request service upgrade */ 174 bool intr; /* T if interruptible */ 175 bool unmarshalling_error; /* T if an unmarshalling error occurred */ 176 bool responded; /* Got a response from the call (may be abort) */ 177 u16 service_id; /* Actual service ID (after upgrade) */ 178 unsigned int debug_id; /* Trace ID */ 179 u32 operation_ID; /* operation ID for an incoming call */ 180 u32 count; /* count for use in unmarshalling */ 181 union { /* place to extract temporary data */ 182 struct { 183 __be32 tmp_u; 184 __be32 tmp; 185 } __attribute__((packed)); 186 __be64 tmp64; 187 }; 188 ktime_t issue_time; /* Time of issue of operation */ 189 }; 190 191 struct afs_call_type { 192 const char *name; 193 unsigned int op; /* Really enum afs_fs_operation */ 194 195 /* deliver request or reply data to an call 196 * - returning an error will cause the call to be aborted 197 */ 198 int (*deliver)(struct afs_call *call); 199 200 /* clean up a call */ 201 void (*destructor)(struct afs_call *call); 202 203 /* Work function */ 204 void (*work)(struct work_struct *work); 205 206 /* Call done function (gets called immediately on success or failure) */ 207 void (*done)(struct afs_call *call); 208 }; 209 210 /* 211 * Key available for writeback on a file. 212 */ 213 struct afs_wb_key { 214 refcount_t usage; 215 struct key *key; 216 struct list_head vnode_link; /* Link in vnode->wb_keys */ 217 }; 218 219 /* 220 * AFS open file information record. Pointed to by file->private_data. 221 */ 222 struct afs_file { 223 struct key *key; /* The key this file was opened with */ 224 struct afs_wb_key *wb; /* Writeback key record for this file */ 225 }; 226 227 static inline struct key *afs_file_key(struct file *file) 228 { 229 struct afs_file *af = file->private_data; 230 231 return af->key; 232 } 233 234 /* 235 * Record of an outstanding read operation on a vnode. 236 */ 237 struct afs_read { 238 loff_t pos; /* Where to start reading */ 239 loff_t len; /* How much we're asking for */ 240 loff_t actual_len; /* How much we're actually getting */ 241 loff_t file_size; /* File size returned by server */ 242 struct key *key; /* The key to use to reissue the read */ 243 struct afs_vnode *vnode; /* The file being read into. */ 244 struct netfs_io_subrequest *subreq; /* Fscache helper read request this belongs to */ 245 afs_dataversion_t data_version; /* Version number returned by server */ 246 refcount_t usage; 247 unsigned int call_debug_id; 248 unsigned int nr_pages; 249 int error; 250 void (*done)(struct afs_read *); 251 void (*cleanup)(struct afs_read *); 252 struct iov_iter *iter; /* Iterator representing the buffer */ 253 struct iov_iter def_iter; /* Default iterator */ 254 }; 255 256 /* 257 * AFS superblock private data 258 * - there's one superblock per volume 259 */ 260 struct afs_super_info { 261 struct net *net_ns; /* Network namespace */ 262 struct afs_cell *cell; /* The cell in which the volume resides */ 263 struct afs_volume *volume; /* volume record */ 264 enum afs_flock_mode flock_mode:8; /* File locking emulation mode */ 265 bool dyn_root; /* True if dynamic root */ 266 }; 267 268 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) 269 { 270 return sb->s_fs_info; 271 } 272 273 extern struct file_system_type afs_fs_type; 274 275 /* 276 * Set of substitutes for @sys. 277 */ 278 struct afs_sysnames { 279 #define AFS_NR_SYSNAME 16 280 char *subs[AFS_NR_SYSNAME]; 281 refcount_t usage; 282 unsigned short nr; 283 char blank[1]; 284 }; 285 286 /* 287 * AFS network namespace record. 288 */ 289 struct afs_net { 290 struct net *net; /* Backpointer to the owning net namespace */ 291 struct afs_uuid uuid; 292 bool live; /* F if this namespace is being removed */ 293 294 /* AF_RXRPC I/O stuff */ 295 struct socket *socket; 296 struct afs_call *spare_incoming_call; 297 struct work_struct charge_preallocation_work; 298 struct mutex socket_mutex; 299 atomic_t nr_outstanding_calls; 300 atomic_t nr_superblocks; 301 302 /* Cell database */ 303 struct rb_root cells; 304 struct afs_cell *ws_cell; 305 struct work_struct cells_manager; 306 struct timer_list cells_timer; 307 atomic_t cells_outstanding; 308 struct rw_semaphore cells_lock; 309 struct mutex cells_alias_lock; 310 311 struct mutex proc_cells_lock; 312 struct hlist_head proc_cells; 313 314 /* Known servers. Theoretically each fileserver can only be in one 315 * cell, but in practice, people create aliases and subsets and there's 316 * no easy way to distinguish them. 317 */ 318 seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */ 319 struct rb_root fs_servers; /* afs_server (by server UUID or address) */ 320 struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */ 321 struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */ 322 struct hlist_head fs_proc; /* procfs servers list */ 323 324 struct hlist_head fs_addresses; /* afs_server (by lowest IPv6 addr) */ 325 seqlock_t fs_addr_lock; /* For fs_addresses[46] */ 326 327 struct work_struct fs_manager; 328 struct timer_list fs_timer; 329 330 struct work_struct fs_prober; 331 struct timer_list fs_probe_timer; 332 atomic_t servers_outstanding; 333 334 /* File locking renewal management */ 335 struct mutex lock_manager_mutex; 336 337 /* Misc */ 338 struct super_block *dynroot_sb; /* Dynamic root mount superblock */ 339 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ 340 struct afs_sysnames *sysnames; 341 rwlock_t sysnames_lock; 342 struct afs_addr_preference_list __rcu *address_prefs; 343 u16 address_pref_version; 344 345 /* Statistics counters */ 346 atomic_t n_lookup; /* Number of lookups done */ 347 atomic_t n_reval; /* Number of dentries needing revalidation */ 348 atomic_t n_inval; /* Number of invalidations by the server */ 349 atomic_t n_relpg; /* Number of invalidations by release_folio */ 350 atomic_t n_read_dir; /* Number of directory pages read */ 351 atomic_t n_dir_cr; /* Number of directory entry creation edits */ 352 atomic_t n_dir_rm; /* Number of directory entry removal edits */ 353 atomic_t n_stores; /* Number of store ops */ 354 atomic_long_t n_store_bytes; /* Number of bytes stored */ 355 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ 356 atomic_t n_fetches; /* Number of data fetch ops */ 357 }; 358 359 extern const char afs_init_sysname[]; 360 361 enum afs_cell_state { 362 AFS_CELL_UNSET, 363 AFS_CELL_ACTIVATING, 364 AFS_CELL_ACTIVE, 365 AFS_CELL_DEACTIVATING, 366 AFS_CELL_INACTIVE, 367 AFS_CELL_FAILED, 368 AFS_CELL_REMOVED, 369 }; 370 371 /* 372 * AFS cell record. 373 * 374 * This is a tricky concept to get right as it is possible to create aliases 375 * simply by pointing AFSDB/SRV records for two names at the same set of VL 376 * servers; it is also possible to do things like setting up two sets of VL 377 * servers, one of which provides a superset of the volumes provided by the 378 * other (for internal/external division, for example). 379 * 380 * Cells only exist in the sense that (a) a cell's name maps to a set of VL 381 * servers and (b) a cell's name is used by the client to select the key to use 382 * for authentication and encryption. The cell name is not typically used in 383 * the protocol. 384 * 385 * Two cells are determined to be aliases if they have an explicit alias (YFS 386 * only), share any VL servers in common or have at least one volume in common. 387 * "In common" means that the address list of the VL servers or the fileservers 388 * share at least one endpoint. 389 */ 390 struct afs_cell { 391 union { 392 struct rcu_head rcu; 393 struct rb_node net_node; /* Node in net->cells */ 394 }; 395 struct afs_net *net; 396 struct afs_cell *alias_of; /* The cell this is an alias of */ 397 struct afs_volume *root_volume; /* The root.cell volume if there is one */ 398 struct key *anonymous_key; /* anonymous user key for this cell */ 399 struct work_struct manager; /* Manager for init/deinit/dns */ 400 struct hlist_node proc_link; /* /proc cell list link */ 401 time64_t dns_expiry; /* Time AFSDB/SRV record expires */ 402 time64_t last_inactive; /* Time of last drop of usage count */ 403 refcount_t ref; /* Struct refcount */ 404 atomic_t active; /* Active usage counter */ 405 unsigned long flags; 406 #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */ 407 #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */ 408 #define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */ 409 enum afs_cell_state state; 410 short error; 411 enum dns_record_source dns_source:8; /* Latest source of data from lookup */ 412 enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */ 413 unsigned int dns_lookup_count; /* Counter of DNS lookups */ 414 unsigned int debug_id; 415 416 /* The volumes belonging to this cell */ 417 struct rw_semaphore vs_lock; /* Lock for server->volumes */ 418 struct rb_root volumes; /* Tree of volumes on this server */ 419 struct hlist_head proc_volumes; /* procfs volume list */ 420 seqlock_t volume_lock; /* For volumes */ 421 422 /* Active fileserver interaction state. */ 423 struct rb_root fs_servers; /* afs_server (by server UUID) */ 424 seqlock_t fs_lock; /* For fs_servers */ 425 426 /* VL server list. */ 427 rwlock_t vl_servers_lock; /* Lock on vl_servers */ 428 struct afs_vlserver_list __rcu *vl_servers; 429 430 u8 name_len; /* Length of name */ 431 char *name; /* Cell name, case-flattened and NUL-padded */ 432 }; 433 434 /* 435 * Volume Location server record. 436 */ 437 struct afs_vlserver { 438 struct rcu_head rcu; 439 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */ 440 unsigned long flags; 441 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ 442 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ 443 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ 444 #define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */ 445 rwlock_t lock; /* Lock on addresses */ 446 refcount_t ref; 447 unsigned int rtt; /* Server's current RTT in uS */ 448 unsigned int debug_id; 449 450 /* Probe state */ 451 wait_queue_head_t probe_wq; 452 atomic_t probe_outstanding; 453 spinlock_t probe_lock; 454 struct { 455 unsigned int rtt; /* Best RTT in uS (or UINT_MAX) */ 456 u32 abort_code; 457 short error; 458 unsigned short flags; 459 #define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */ 460 #define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */ 461 #define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */ 462 #define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */ 463 } probe; 464 465 u16 service_id; /* Service ID we're using */ 466 u16 port; 467 u16 name_len; /* Length of name */ 468 char name[]; /* Server name, case-flattened */ 469 }; 470 471 /* 472 * Weighted list of Volume Location servers. 473 */ 474 struct afs_vlserver_entry { 475 u16 priority; /* Preference (as SRV) */ 476 u16 weight; /* Weight (as SRV) */ 477 enum dns_record_source source:8; 478 enum dns_lookup_status status:8; 479 struct afs_vlserver *server; 480 }; 481 482 struct afs_vlserver_list { 483 struct rcu_head rcu; 484 refcount_t ref; 485 u8 nr_servers; 486 u8 index; /* Server currently in use */ 487 u8 preferred; /* Preferred server */ 488 enum dns_record_source source:8; 489 enum dns_lookup_status status:8; 490 rwlock_t lock; 491 struct afs_vlserver_entry servers[]; 492 }; 493 494 /* 495 * Cached VLDB entry. 496 * 497 * This is pointed to by cell->vldb_entries, indexed by name. 498 */ 499 struct afs_vldb_entry { 500 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ 501 502 unsigned long flags; 503 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ 504 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ 505 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ 506 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ 507 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ 508 509 uuid_t fs_server[AFS_NMAXNSERVERS]; 510 u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */ 511 u8 fs_mask[AFS_NMAXNSERVERS]; 512 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 513 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 514 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 515 u8 vlsf_flags[AFS_NMAXNSERVERS]; 516 short error; 517 u8 nr_servers; /* Number of server records */ 518 u8 name_len; 519 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 520 }; 521 522 /* 523 * Fileserver endpoint state. The records the addresses of a fileserver's 524 * endpoints and the state and result of a round of probing on them. This 525 * allows the rotation algorithm to access those results without them being 526 * erased by a subsequent round of probing. 527 */ 528 struct afs_endpoint_state { 529 struct rcu_head rcu; 530 struct afs_addr_list *addresses; /* The addresses being probed */ 531 unsigned long responsive_set; /* Bitset of responsive endpoints */ 532 unsigned long failed_set; /* Bitset of endpoints we failed to probe */ 533 refcount_t ref; 534 unsigned int server_id; /* Debug ID of server */ 535 unsigned int probe_seq; /* Probe sequence (from server::probe_counter) */ 536 atomic_t nr_probing; /* Number of outstanding probes */ 537 unsigned int rtt; /* Best RTT in uS (or UINT_MAX) */ 538 s32 abort_code; 539 short error; 540 unsigned long flags; 541 #define AFS_ESTATE_RESPONDED 0 /* Set if the server responded */ 542 #define AFS_ESTATE_SUPERSEDED 1 /* Set if this record has been superseded */ 543 #define AFS_ESTATE_IS_YFS 2 /* Set if probe upgraded to YFS */ 544 #define AFS_ESTATE_NOT_YFS 3 /* Set if probe didn't upgrade to YFS */ 545 #define AFS_ESTATE_LOCAL_FAILURE 4 /* Set if there was a local failure (eg. ENOMEM) */ 546 }; 547 548 /* 549 * Record of fileserver with which we're actively communicating. 550 */ 551 struct afs_server { 552 struct rcu_head rcu; 553 union { 554 uuid_t uuid; /* Server ID */ 555 struct afs_uuid _uuid; 556 }; 557 558 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 559 struct rb_node uuid_rb; /* Link in net->fs_servers */ 560 struct afs_server __rcu *uuid_next; /* Next server with same UUID */ 561 struct afs_server *uuid_prev; /* Previous server with same UUID */ 562 struct list_head probe_link; /* Link in net->fs_probe_list */ 563 struct hlist_node addr_link; /* Link in net->fs_addresses6 */ 564 struct hlist_node proc_link; /* Link in net->fs_proc */ 565 struct list_head volumes; /* RCU list of afs_server_entry objects */ 566 struct afs_server *gc_next; /* Next server in manager's list */ 567 time64_t unuse_time; /* Time at which last unused */ 568 unsigned long flags; 569 #define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */ 570 #define AFS_SERVER_FL_UPDATING 1 571 #define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */ 572 #define AFS_SERVER_FL_NOT_READY 4 /* The record is not ready for use */ 573 #define AFS_SERVER_FL_NOT_FOUND 5 /* VL server says no such server */ 574 #define AFS_SERVER_FL_VL_FAIL 6 /* Failed to access VL server */ 575 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ 576 #define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */ 577 #define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */ 578 #define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */ 579 #define AFS_SERVER_FL_HAS_FS64 19 /* Fileserver supports FS.{Fetch,Store}Data64 */ 580 refcount_t ref; /* Object refcount */ 581 atomic_t active; /* Active user count */ 582 u32 addr_version; /* Address list version */ 583 u16 service_id; /* Service ID we're using. */ 584 unsigned int rtt; /* Server's current RTT in uS */ 585 unsigned int debug_id; /* Debugging ID for traces */ 586 587 /* file service access */ 588 rwlock_t fs_lock; /* access lock */ 589 590 /* Probe state */ 591 struct afs_endpoint_state __rcu *endpoint_state; /* Latest endpoint/probe state */ 592 unsigned long probed_at; /* Time last probe was dispatched (jiffies) */ 593 wait_queue_head_t probe_wq; 594 unsigned int probe_counter; /* Number of probes issued */ 595 spinlock_t probe_lock; 596 }; 597 598 enum afs_ro_replicating { 599 AFS_RO_NOT_REPLICATING, /* Not doing replication */ 600 AFS_RO_REPLICATING_USE_OLD, /* Replicating; use old version */ 601 AFS_RO_REPLICATING_USE_NEW, /* Replicating; switch to new version */ 602 } __mode(byte); 603 604 /* 605 * Replaceable volume server list. 606 */ 607 struct afs_server_entry { 608 struct afs_server *server; 609 struct afs_volume *volume; 610 struct list_head slink; /* Link in server->volumes */ 611 time64_t cb_expires_at; /* Time at which volume-level callback expires */ 612 unsigned long flags; 613 #define AFS_SE_EXCLUDED 0 /* Set if server is to be excluded in rotation */ 614 #define AFS_SE_VOLUME_OFFLINE 1 /* Set if volume offline notice given */ 615 #define AFS_SE_VOLUME_BUSY 2 /* Set if volume busy notice given */ 616 }; 617 618 struct afs_server_list { 619 struct rcu_head rcu; 620 refcount_t usage; 621 bool attached; /* T if attached to servers */ 622 enum afs_ro_replicating ro_replicating; /* RW->RO update (probably) in progress */ 623 unsigned char nr_servers; 624 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ 625 unsigned int seq; /* Set to ->servers_seq when installed */ 626 rwlock_t lock; 627 struct afs_server_entry servers[]; 628 }; 629 630 /* 631 * Live AFS volume management. 632 */ 633 struct afs_volume { 634 struct rcu_head rcu; 635 afs_volid_t vid; /* The volume ID of this volume */ 636 afs_volid_t vids[AFS_MAXTYPES]; /* All associated volume IDs */ 637 refcount_t ref; 638 time64_t update_at; /* Time at which to next update */ 639 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 640 struct rb_node cell_node; /* Link in cell->volumes */ 641 struct hlist_node proc_link; /* Link in cell->proc_volumes */ 642 struct super_block __rcu *sb; /* Superblock on which inodes reside */ 643 struct work_struct destructor; /* Deferred destructor */ 644 unsigned long flags; 645 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ 646 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ 647 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ 648 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ 649 #define AFS_VOLUME_MAYBE_NO_IBULK 4 /* - T if some servers don't have InlineBulkStatus */ 650 #define AFS_VOLUME_RM_TREE 5 /* - Set if volume removed from cell->volumes */ 651 #ifdef CONFIG_AFS_FSCACHE 652 struct fscache_volume *cache; /* Caching cookie */ 653 #endif 654 struct afs_server_list __rcu *servers; /* List of servers on which volume resides */ 655 rwlock_t servers_lock; /* Lock for ->servers */ 656 unsigned int servers_seq; /* Incremented each time ->servers changes */ 657 658 /* RO release tracking */ 659 struct mutex volsync_lock; /* Time/state evaluation lock */ 660 time64_t creation_time; /* Volume creation time (or TIME64_MIN) */ 661 time64_t update_time; /* Volume update time (or TIME64_MIN) */ 662 663 /* Callback management */ 664 struct mutex cb_check_lock; /* Lock to control race to check after v_break */ 665 time64_t cb_expires_at; /* Earliest volume callback expiry time */ 666 atomic_t cb_ro_snapshot; /* RO volume update-from-snapshot counter */ 667 atomic_t cb_v_break; /* Volume-break event counter. */ 668 atomic_t cb_v_check; /* Volume-break has-been-checked counter. */ 669 atomic_t cb_scrub; /* Scrub-all-data event counter. */ 670 rwlock_t cb_v_break_lock; 671 struct rw_semaphore open_mmaps_lock; 672 struct list_head open_mmaps; /* List of vnodes that are mmapped */ 673 674 afs_voltype_t type; /* type of volume */ 675 char type_force; /* force volume type (suppress R/O -> R/W) */ 676 u8 name_len; 677 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 678 }; 679 680 enum afs_lock_state { 681 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ 682 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ 683 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ 684 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ 685 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ 686 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ 687 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ 688 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */ 689 }; 690 691 /* 692 * AFS inode private data. 693 * 694 * Note that afs_alloc_inode() *must* reset anything that could incorrectly 695 * leak from one inode to another. 696 */ 697 struct afs_vnode { 698 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 699 struct afs_volume *volume; /* volume on which vnode resides */ 700 struct afs_fid fid; /* the file identifier for this inode */ 701 struct afs_file_status status; /* AFS status info for this file */ 702 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ 703 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ 704 struct mutex io_lock; /* Lock for serialising I/O on this mutex */ 705 struct rw_semaphore validate_lock; /* lock for validating this vnode */ 706 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ 707 struct key *silly_key; /* Silly rename key */ 708 spinlock_t wb_lock; /* lock for wb_keys */ 709 spinlock_t lock; /* waitqueue/flags lock */ 710 unsigned long flags; 711 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 712 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ 713 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 714 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 715 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 716 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ 717 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ 718 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ 719 #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */ 720 #define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */ 721 722 struct list_head wb_keys; /* List of keys available for writeback */ 723 struct list_head pending_locks; /* locks waiting to be granted */ 724 struct list_head granted_locks; /* locks granted on this file */ 725 struct delayed_work lock_work; /* work to be done in locking */ 726 struct key *lock_key; /* Key to be used in lock ops */ 727 ktime_t locked_at; /* Time at which lock obtained */ 728 enum afs_lock_state lock_state : 8; 729 afs_lock_type_t lock_type : 8; 730 731 /* outstanding callback notification on this file */ 732 struct work_struct cb_work; /* Work for mmap'd files */ 733 struct list_head cb_mmap_link; /* Link in cell->fs_open_mmaps */ 734 void *cb_server; /* Server with callback/filelock */ 735 atomic_t cb_nr_mmap; /* Number of mmaps */ 736 unsigned int cb_ro_snapshot; /* RO volume release counter on ->volume */ 737 unsigned int cb_scrub; /* Scrub counter on ->volume */ 738 unsigned int cb_break; /* Break counter on vnode */ 739 unsigned int cb_v_check; /* Break check counter on ->volume */ 740 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ 741 742 atomic64_t cb_expires_at; /* time at which callback expires */ 743 #define AFS_NO_CB_PROMISE TIME64_MIN 744 }; 745 746 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) 747 { 748 #ifdef CONFIG_AFS_FSCACHE 749 return netfs_i_cookie(&vnode->netfs); 750 #else 751 return NULL; 752 #endif 753 } 754 755 static inline void afs_vnode_set_cache(struct afs_vnode *vnode, 756 struct fscache_cookie *cookie) 757 { 758 #ifdef CONFIG_AFS_FSCACHE 759 vnode->netfs.cache = cookie; 760 if (cookie) 761 mapping_set_release_always(vnode->netfs.inode.i_mapping); 762 #endif 763 } 764 765 /* 766 * cached security record for one user's attempt to access a vnode 767 */ 768 struct afs_permit { 769 struct key *key; /* RxRPC ticket holding a security context */ 770 afs_access_t access; /* CallerAccess value for this key */ 771 }; 772 773 /* 774 * Immutable cache of CallerAccess records from attempts to access vnodes. 775 * These may be shared between multiple vnodes. 776 */ 777 struct afs_permits { 778 struct rcu_head rcu; 779 struct hlist_node hash_node; /* Link in hash */ 780 unsigned long h; /* Hash value for this permit list */ 781 refcount_t usage; 782 unsigned short nr_permits; /* Number of records */ 783 bool invalidated; /* Invalidated due to key change */ 784 struct afs_permit permits[] __counted_by(nr_permits); /* List of permits sorted by key pointer */ 785 }; 786 787 /* 788 * Error prioritisation and accumulation. 789 */ 790 struct afs_error { 791 s32 abort_code; /* Cumulative abort code */ 792 short error; /* Cumulative error */ 793 bool responded; /* T if server responded */ 794 bool aborted; /* T if ->error is from an abort */ 795 }; 796 797 /* 798 * Cursor for iterating over a set of volume location servers. 799 */ 800 struct afs_vl_cursor { 801 struct afs_cell *cell; /* The cell we're querying */ 802 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ 803 struct afs_vlserver *server; /* Server on which this resides */ 804 struct afs_addr_list *alist; /* Current address list (pins ref) */ 805 struct key *key; /* Key for the server */ 806 unsigned long untried_servers; /* Bitmask of untried servers */ 807 unsigned long addr_tried; /* Tried addresses */ 808 struct afs_error cumul_error; /* Cumulative error */ 809 unsigned int debug_id; 810 s32 call_abort_code; 811 short call_error; /* Error from single call */ 812 short server_index; /* Current server */ 813 signed char addr_index; /* Current address */ 814 unsigned short flags; 815 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ 816 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ 817 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ 818 short nr_iterations; /* Number of server iterations */ 819 bool call_responded; /* T if the current address responded */ 820 }; 821 822 /* 823 * Fileserver state tracking for an operation. An array of these is kept, 824 * indexed by server index. 825 */ 826 struct afs_server_state { 827 /* Tracking of fileserver probe state. Other operations may interfere 828 * by probing a fileserver when accessing other volumes. 829 */ 830 unsigned int probe_seq; 831 unsigned long untried_addrs; /* Addresses we haven't tried yet */ 832 struct wait_queue_entry probe_waiter; 833 struct afs_endpoint_state *endpoint_state; /* Endpoint state being monitored */ 834 }; 835 836 /* 837 * Fileserver operation methods. 838 */ 839 struct afs_operation_ops { 840 void (*issue_afs_rpc)(struct afs_operation *op); 841 void (*issue_yfs_rpc)(struct afs_operation *op); 842 void (*success)(struct afs_operation *op); 843 void (*aborted)(struct afs_operation *op); 844 void (*failed)(struct afs_operation *op); 845 void (*edit_dir)(struct afs_operation *op); 846 void (*put)(struct afs_operation *op); 847 }; 848 849 struct afs_vnode_param { 850 struct afs_vnode *vnode; 851 struct afs_fid fid; /* Fid to access */ 852 struct afs_status_cb scb; /* Returned status and callback promise */ 853 afs_dataversion_t dv_before; /* Data version before the call */ 854 unsigned int cb_break_before; /* cb_break before the call */ 855 u8 dv_delta; /* Expected change in data version */ 856 bool put_vnode:1; /* T if we have a ref on the vnode */ 857 bool need_io_lock:1; /* T if we need the I/O lock on this */ 858 bool update_ctime:1; /* Need to update the ctime */ 859 bool set_size:1; /* Must update i_size */ 860 bool op_unlinked:1; /* True if file was unlinked by op */ 861 bool speculative:1; /* T if speculative status fetch (no vnode lock) */ 862 bool modification:1; /* Set if the content gets modified */ 863 }; 864 865 /* 866 * Fileserver operation wrapper, handling server and address rotation 867 * asynchronously. May make simultaneous calls to multiple servers. 868 */ 869 struct afs_operation { 870 struct afs_net *net; /* Network namespace */ 871 struct key *key; /* Key for the cell */ 872 const struct afs_call_type *type; /* Type of call done */ 873 const struct afs_operation_ops *ops; 874 875 /* Parameters/results for the operation */ 876 struct afs_volume *volume; /* Volume being accessed */ 877 struct afs_vnode_param file[2]; 878 struct afs_vnode_param *more_files; 879 struct afs_volsync pre_volsync; /* Volsync before op */ 880 struct afs_volsync volsync; /* Volsync returned by op */ 881 struct dentry *dentry; /* Dentry to be altered */ 882 struct dentry *dentry_2; /* Second dentry to be altered */ 883 struct timespec64 mtime; /* Modification time to record */ 884 struct timespec64 ctime; /* Change time to set */ 885 struct afs_error cumul_error; /* Cumulative error */ 886 short nr_files; /* Number of entries in file[], more_files */ 887 unsigned int debug_id; 888 889 unsigned int cb_v_break; /* Volume break counter before op */ 890 891 union { 892 struct { 893 int which; /* Which ->file[] to fetch for */ 894 } fetch_status; 895 struct { 896 int reason; /* enum afs_edit_dir_reason */ 897 mode_t mode; 898 const char *symlink; 899 } create; 900 struct { 901 bool need_rehash; 902 } unlink; 903 struct { 904 struct dentry *rehash; 905 struct dentry *tmp; 906 bool new_negative; 907 } rename; 908 struct { 909 struct afs_read *req; 910 } fetch; 911 struct { 912 afs_lock_type_t type; 913 } lock; 914 struct { 915 struct iov_iter *write_iter; 916 loff_t pos; 917 loff_t size; 918 loff_t i_size; 919 } store; 920 struct { 921 struct iattr *attr; 922 loff_t old_i_size; 923 } setattr; 924 struct afs_acl *acl; 925 struct yfs_acl *yacl; 926 struct { 927 struct afs_volume_status vs; 928 struct kstatfs *buf; 929 } volstatus; 930 }; 931 932 /* Fileserver iteration state */ 933 struct afs_server_list *server_list; /* Current server list (pins ref) */ 934 struct afs_server *server; /* Server we're using (ref pinned by server_list) */ 935 struct afs_endpoint_state *estate; /* Current endpoint state (doesn't pin ref) */ 936 struct afs_server_state *server_states; /* States of the servers involved */ 937 struct afs_call *call; 938 unsigned long untried_servers; /* Bitmask of untried servers */ 939 unsigned long addr_tried; /* Tried addresses */ 940 s32 call_abort_code; /* Abort code from single call */ 941 short call_error; /* Error from single call */ 942 short server_index; /* Current server */ 943 short nr_iterations; /* Number of server iterations */ 944 signed char addr_index; /* Current address */ 945 bool call_responded; /* T if the current address responded */ 946 947 unsigned int flags; 948 #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ 949 #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ 950 #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ 951 #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ 952 #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ 953 #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ 954 #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ 955 #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ 956 #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ 957 #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ 958 #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ 959 #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ 960 #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ 961 }; 962 963 /* 964 * Cache auxiliary data. 965 */ 966 struct afs_vnode_cache_aux { 967 __be64 data_version; 968 } __packed; 969 970 static inline void afs_set_cache_aux(struct afs_vnode *vnode, 971 struct afs_vnode_cache_aux *aux) 972 { 973 aux->data_version = cpu_to_be64(vnode->status.data_version); 974 } 975 976 static inline void afs_invalidate_cache(struct afs_vnode *vnode, unsigned int flags) 977 { 978 struct afs_vnode_cache_aux aux; 979 980 afs_set_cache_aux(vnode, &aux); 981 fscache_invalidate(afs_vnode_cache(vnode), &aux, 982 i_size_read(&vnode->netfs.inode), flags); 983 } 984 985 #include <trace/events/afs.h> 986 987 /*****************************************************************************/ 988 /* 989 * addr_list.c 990 */ 991 struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist, enum afs_alist_trace reason); 992 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int nr); 993 extern void afs_put_addrlist(struct afs_addr_list *alist, enum afs_alist_trace reason); 994 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, 995 const char *, size_t, char, 996 unsigned short, unsigned short); 997 bool afs_addr_list_same(const struct afs_addr_list *a, 998 const struct afs_addr_list *b); 999 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); 1000 1001 extern int afs_merge_fs_addr4(struct afs_net *net, struct afs_addr_list *addr, 1002 __be32 xdr, u16 port); 1003 extern int afs_merge_fs_addr6(struct afs_net *net, struct afs_addr_list *addr, 1004 __be32 *xdr, u16 port); 1005 1006 /* 1007 * addr_prefs.c 1008 */ 1009 int afs_proc_addr_prefs_write(struct file *file, char *buf, size_t size); 1010 void afs_get_address_preferences_rcu(struct afs_net *net, struct afs_addr_list *alist); 1011 void afs_get_address_preferences(struct afs_net *net, struct afs_addr_list *alist); 1012 1013 /* 1014 * callback.c 1015 */ 1016 extern void afs_invalidate_mmap_work(struct work_struct *); 1017 extern void afs_init_callback_state(struct afs_server *); 1018 extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 1019 extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 1020 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); 1021 1022 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) 1023 { 1024 return vnode->cb_break + vnode->cb_ro_snapshot + vnode->cb_scrub; 1025 } 1026 1027 static inline bool afs_cb_is_broken(unsigned int cb_break, 1028 const struct afs_vnode *vnode) 1029 { 1030 return cb_break != (vnode->cb_break + 1031 atomic_read(&vnode->volume->cb_ro_snapshot) + 1032 atomic_read(&vnode->volume->cb_scrub)); 1033 } 1034 1035 /* 1036 * cell.c 1037 */ 1038 extern int afs_cell_init(struct afs_net *, const char *); 1039 extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, 1040 enum afs_cell_trace); 1041 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, 1042 const char *, bool); 1043 extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); 1044 extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace); 1045 extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); 1046 extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); 1047 extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); 1048 extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); 1049 extern void afs_manage_cells(struct work_struct *); 1050 extern void afs_cells_timer(struct timer_list *); 1051 extern void __net_exit afs_cell_purge(struct afs_net *); 1052 1053 /* 1054 * cmservice.c 1055 */ 1056 extern bool afs_cm_incoming_call(struct afs_call *); 1057 1058 /* 1059 * dir.c 1060 */ 1061 extern const struct file_operations afs_dir_file_operations; 1062 extern const struct inode_operations afs_dir_inode_operations; 1063 extern const struct address_space_operations afs_dir_aops; 1064 extern const struct dentry_operations afs_fs_dentry_operations; 1065 1066 extern void afs_d_release(struct dentry *); 1067 extern void afs_check_for_remote_deletion(struct afs_operation *); 1068 1069 /* 1070 * dir_edit.c 1071 */ 1072 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, 1073 enum afs_edit_dir_reason); 1074 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); 1075 1076 /* 1077 * dir_silly.c 1078 */ 1079 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, 1080 struct dentry *, struct key *); 1081 extern int afs_silly_iput(struct dentry *, struct inode *); 1082 1083 /* 1084 * dynroot.c 1085 */ 1086 extern const struct inode_operations afs_dynroot_inode_operations; 1087 extern const struct dentry_operations afs_dynroot_dentry_operations; 1088 1089 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); 1090 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); 1091 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); 1092 extern int afs_dynroot_populate(struct super_block *); 1093 extern void afs_dynroot_depopulate(struct super_block *); 1094 1095 /* 1096 * file.c 1097 */ 1098 extern const struct address_space_operations afs_file_aops; 1099 extern const struct address_space_operations afs_symlink_aops; 1100 extern const struct inode_operations afs_file_inode_operations; 1101 extern const struct file_operations afs_file_operations; 1102 extern const struct netfs_request_ops afs_req_ops; 1103 1104 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); 1105 extern void afs_put_wb_key(struct afs_wb_key *); 1106 extern int afs_open(struct inode *, struct file *); 1107 extern int afs_release(struct inode *, struct file *); 1108 extern int afs_fetch_data(struct afs_vnode *, struct afs_read *); 1109 extern struct afs_read *afs_alloc_read(gfp_t); 1110 extern void afs_put_read(struct afs_read *); 1111 1112 static inline struct afs_read *afs_get_read(struct afs_read *req) 1113 { 1114 refcount_inc(&req->usage); 1115 return req; 1116 } 1117 1118 /* 1119 * flock.c 1120 */ 1121 extern struct workqueue_struct *afs_lock_manager; 1122 1123 extern void afs_lock_op_done(struct afs_call *); 1124 extern void afs_lock_work(struct work_struct *); 1125 extern void afs_lock_may_be_available(struct afs_vnode *); 1126 extern int afs_lock(struct file *, int, struct file_lock *); 1127 extern int afs_flock(struct file *, int, struct file_lock *); 1128 1129 /* 1130 * fsclient.c 1131 */ 1132 extern void afs_fs_fetch_status(struct afs_operation *); 1133 extern void afs_fs_fetch_data(struct afs_operation *); 1134 extern void afs_fs_create_file(struct afs_operation *); 1135 extern void afs_fs_make_dir(struct afs_operation *); 1136 extern void afs_fs_remove_file(struct afs_operation *); 1137 extern void afs_fs_remove_dir(struct afs_operation *); 1138 extern void afs_fs_link(struct afs_operation *); 1139 extern void afs_fs_symlink(struct afs_operation *); 1140 extern void afs_fs_rename(struct afs_operation *); 1141 extern void afs_fs_store_data(struct afs_operation *); 1142 extern void afs_fs_setattr(struct afs_operation *); 1143 extern void afs_fs_get_volume_status(struct afs_operation *); 1144 extern void afs_fs_set_lock(struct afs_operation *); 1145 extern void afs_fs_extend_lock(struct afs_operation *); 1146 extern void afs_fs_release_lock(struct afs_operation *); 1147 int afs_fs_give_up_all_callbacks(struct afs_net *net, struct afs_server *server, 1148 struct afs_address *addr, struct key *key); 1149 bool afs_fs_get_capabilities(struct afs_net *net, struct afs_server *server, 1150 struct afs_endpoint_state *estate, unsigned int addr_index, 1151 struct key *key); 1152 extern void afs_fs_inline_bulk_status(struct afs_operation *); 1153 1154 struct afs_acl { 1155 u32 size; 1156 u8 data[] __counted_by(size); 1157 }; 1158 1159 extern void afs_fs_fetch_acl(struct afs_operation *); 1160 extern void afs_fs_store_acl(struct afs_operation *); 1161 1162 /* 1163 * fs_operation.c 1164 */ 1165 extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); 1166 extern int afs_put_operation(struct afs_operation *); 1167 extern bool afs_begin_vnode_operation(struct afs_operation *); 1168 extern void afs_wait_for_operation(struct afs_operation *); 1169 extern int afs_do_sync_operation(struct afs_operation *); 1170 1171 static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, 1172 struct afs_vnode *vnode) 1173 { 1174 op->file[n].vnode = vnode; 1175 op->file[n].need_io_lock = true; 1176 } 1177 1178 static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, 1179 const struct afs_fid *fid) 1180 { 1181 op->file[n].fid = *fid; 1182 } 1183 1184 /* 1185 * fs_probe.c 1186 */ 1187 struct afs_endpoint_state *afs_get_endpoint_state(struct afs_endpoint_state *estate, 1188 enum afs_estate_trace where); 1189 void afs_put_endpoint_state(struct afs_endpoint_state *estate, enum afs_estate_trace where); 1190 extern void afs_fileserver_probe_result(struct afs_call *); 1191 void afs_fs_probe_fileserver(struct afs_net *net, struct afs_server *server, 1192 struct afs_addr_list *new_addrs, struct key *key); 1193 int afs_wait_for_fs_probes(struct afs_operation *op, struct afs_server_state *states, bool intr); 1194 extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); 1195 extern void afs_fs_probe_dispatcher(struct work_struct *); 1196 int afs_wait_for_one_fs_probe(struct afs_server *server, struct afs_endpoint_state *estate, 1197 unsigned long exclude, bool is_intr); 1198 extern void afs_fs_probe_cleanup(struct afs_net *); 1199 1200 /* 1201 * inode.c 1202 */ 1203 extern const struct afs_operation_ops afs_fetch_status_operation; 1204 1205 extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); 1206 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); 1207 extern int afs_ilookup5_test_by_fid(struct inode *, void *); 1208 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); 1209 extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); 1210 extern struct inode *afs_root_iget(struct super_block *, struct key *); 1211 extern int afs_getattr(struct mnt_idmap *idmap, const struct path *, 1212 struct kstat *, u32, unsigned int); 1213 extern int afs_setattr(struct mnt_idmap *idmap, struct dentry *, struct iattr *); 1214 extern void afs_evict_inode(struct inode *); 1215 extern int afs_drop_inode(struct inode *); 1216 1217 /* 1218 * main.c 1219 */ 1220 extern struct workqueue_struct *afs_wq; 1221 extern int afs_net_id; 1222 1223 static inline struct afs_net *afs_net(struct net *net) 1224 { 1225 return net_generic(net, afs_net_id); 1226 } 1227 1228 static inline struct afs_net *afs_sb2net(struct super_block *sb) 1229 { 1230 return afs_net(AFS_FS_S(sb)->net_ns); 1231 } 1232 1233 static inline struct afs_net *afs_d2net(struct dentry *dentry) 1234 { 1235 return afs_sb2net(dentry->d_sb); 1236 } 1237 1238 static inline struct afs_net *afs_i2net(struct inode *inode) 1239 { 1240 return afs_sb2net(inode->i_sb); 1241 } 1242 1243 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 1244 { 1245 return afs_i2net(&vnode->netfs.inode); 1246 } 1247 1248 static inline struct afs_net *afs_sock2net(struct sock *sk) 1249 { 1250 return net_generic(sock_net(sk), afs_net_id); 1251 } 1252 1253 static inline void __afs_stat(atomic_t *s) 1254 { 1255 atomic_inc(s); 1256 } 1257 1258 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) 1259 1260 /* 1261 * misc.c 1262 */ 1263 extern int afs_abort_to_error(u32); 1264 extern void afs_prioritise_error(struct afs_error *, int, u32); 1265 1266 static inline void afs_op_nomem(struct afs_operation *op) 1267 { 1268 op->cumul_error.error = -ENOMEM; 1269 } 1270 1271 static inline int afs_op_error(const struct afs_operation *op) 1272 { 1273 return op->cumul_error.error; 1274 } 1275 1276 static inline s32 afs_op_abort_code(const struct afs_operation *op) 1277 { 1278 return op->cumul_error.abort_code; 1279 } 1280 1281 static inline int afs_op_set_error(struct afs_operation *op, int error) 1282 { 1283 return op->cumul_error.error = error; 1284 } 1285 1286 static inline void afs_op_accumulate_error(struct afs_operation *op, int error, s32 abort_code) 1287 { 1288 afs_prioritise_error(&op->cumul_error, error, abort_code); 1289 } 1290 1291 /* 1292 * mntpt.c 1293 */ 1294 extern const struct inode_operations afs_mntpt_inode_operations; 1295 extern const struct inode_operations afs_autocell_inode_operations; 1296 extern const struct file_operations afs_mntpt_file_operations; 1297 1298 extern struct vfsmount *afs_d_automount(struct path *); 1299 extern void afs_mntpt_kill_timer(void); 1300 1301 /* 1302 * proc.c 1303 */ 1304 #ifdef CONFIG_PROC_FS 1305 extern int __net_init afs_proc_init(struct afs_net *); 1306 extern void __net_exit afs_proc_cleanup(struct afs_net *); 1307 extern int afs_proc_cell_setup(struct afs_cell *); 1308 extern void afs_proc_cell_remove(struct afs_cell *); 1309 extern void afs_put_sysnames(struct afs_sysnames *); 1310 #else 1311 static inline int afs_proc_init(struct afs_net *net) { return 0; } 1312 static inline void afs_proc_cleanup(struct afs_net *net) {} 1313 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } 1314 static inline void afs_proc_cell_remove(struct afs_cell *cell) {} 1315 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} 1316 #endif 1317 1318 /* 1319 * rotate.c 1320 */ 1321 void afs_clear_server_states(struct afs_operation *op); 1322 extern bool afs_select_fileserver(struct afs_operation *); 1323 extern void afs_dump_edestaddrreq(const struct afs_operation *); 1324 1325 /* 1326 * rxrpc.c 1327 */ 1328 extern struct workqueue_struct *afs_async_calls; 1329 1330 extern int __net_init afs_open_socket(struct afs_net *); 1331 extern void __net_exit afs_close_socket(struct afs_net *); 1332 extern void afs_charge_preallocation(struct work_struct *); 1333 extern void afs_put_call(struct afs_call *); 1334 void afs_make_call(struct afs_call *call, gfp_t gfp); 1335 void afs_wait_for_call_to_complete(struct afs_call *call); 1336 extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 1337 const struct afs_call_type *, 1338 size_t, size_t); 1339 extern void afs_flat_call_destructor(struct afs_call *); 1340 extern void afs_send_empty_reply(struct afs_call *); 1341 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 1342 extern int afs_extract_data(struct afs_call *, bool); 1343 extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); 1344 1345 static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, 1346 gfp_t gfp) 1347 { 1348 struct afs_addr_list *alist = op->estate->addresses; 1349 1350 op->call = call; 1351 op->type = call->type; 1352 call->op = op; 1353 call->key = op->key; 1354 call->intr = !(op->flags & AFS_OPERATION_UNINTR); 1355 call->peer = rxrpc_kernel_get_peer(alist->addrs[op->addr_index].peer); 1356 call->service_id = op->server->service_id; 1357 afs_make_call(call, gfp); 1358 } 1359 1360 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) 1361 { 1362 call->iov_len = size; 1363 call->kvec[0].iov_base = buf; 1364 call->kvec[0].iov_len = size; 1365 iov_iter_kvec(&call->def_iter, ITER_DEST, call->kvec, 1, size); 1366 } 1367 1368 static inline void afs_extract_to_tmp(struct afs_call *call) 1369 { 1370 call->iov_len = sizeof(call->tmp); 1371 afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); 1372 } 1373 1374 static inline void afs_extract_to_tmp64(struct afs_call *call) 1375 { 1376 call->iov_len = sizeof(call->tmp64); 1377 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); 1378 } 1379 1380 static inline void afs_extract_discard(struct afs_call *call, size_t size) 1381 { 1382 call->iov_len = size; 1383 iov_iter_discard(&call->def_iter, ITER_DEST, size); 1384 } 1385 1386 static inline void afs_extract_to_buf(struct afs_call *call, size_t size) 1387 { 1388 call->iov_len = size; 1389 afs_extract_begin(call, call->buffer, size); 1390 } 1391 1392 static inline int afs_transfer_reply(struct afs_call *call) 1393 { 1394 return afs_extract_data(call, false); 1395 } 1396 1397 static inline bool afs_check_call_state(struct afs_call *call, 1398 enum afs_call_state state) 1399 { 1400 return READ_ONCE(call->state) == state; 1401 } 1402 1403 static inline bool afs_set_call_state(struct afs_call *call, 1404 enum afs_call_state from, 1405 enum afs_call_state to) 1406 { 1407 bool ok = false; 1408 1409 spin_lock_bh(&call->state_lock); 1410 if (call->state == from) { 1411 call->state = to; 1412 trace_afs_call_state(call, from, to, 0, 0); 1413 ok = true; 1414 } 1415 spin_unlock_bh(&call->state_lock); 1416 return ok; 1417 } 1418 1419 static inline void afs_set_call_complete(struct afs_call *call, 1420 int error, u32 remote_abort) 1421 { 1422 enum afs_call_state state; 1423 bool ok = false; 1424 1425 spin_lock_bh(&call->state_lock); 1426 state = call->state; 1427 if (state != AFS_CALL_COMPLETE) { 1428 call->abort_code = remote_abort; 1429 call->error = error; 1430 call->state = AFS_CALL_COMPLETE; 1431 trace_afs_call_state(call, state, AFS_CALL_COMPLETE, 1432 error, remote_abort); 1433 ok = true; 1434 } 1435 spin_unlock_bh(&call->state_lock); 1436 if (ok) { 1437 trace_afs_call_done(call); 1438 1439 /* Asynchronous calls have two refs to release - one from the alloc and 1440 * one queued with the work item - and we can't just deallocate the 1441 * call because the work item may be queued again. 1442 */ 1443 if (call->drop_ref) 1444 afs_put_call(call); 1445 } 1446 } 1447 1448 /* 1449 * security.c 1450 */ 1451 extern void afs_put_permits(struct afs_permits *); 1452 extern void afs_clear_permits(struct afs_vnode *); 1453 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, 1454 struct afs_status_cb *); 1455 extern struct key *afs_request_key(struct afs_cell *); 1456 extern struct key *afs_request_key_rcu(struct afs_cell *); 1457 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); 1458 extern int afs_permission(struct mnt_idmap *, struct inode *, int); 1459 extern void __exit afs_clean_up_permit_cache(void); 1460 1461 /* 1462 * server.c 1463 */ 1464 extern spinlock_t afs_server_peer_lock; 1465 1466 extern struct afs_server *afs_find_server(struct afs_net *, const struct rxrpc_peer *); 1467 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); 1468 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); 1469 extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); 1470 extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace); 1471 extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1472 extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace); 1473 extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1474 extern void afs_manage_servers(struct work_struct *); 1475 extern void afs_servers_timer(struct timer_list *); 1476 extern void afs_fs_probe_timer(struct timer_list *); 1477 extern void __net_exit afs_purge_servers(struct afs_net *); 1478 bool afs_check_server_record(struct afs_operation *op, struct afs_server *server, struct key *key); 1479 1480 static inline void afs_inc_servers_outstanding(struct afs_net *net) 1481 { 1482 atomic_inc(&net->servers_outstanding); 1483 } 1484 1485 static inline void afs_dec_servers_outstanding(struct afs_net *net) 1486 { 1487 if (atomic_dec_and_test(&net->servers_outstanding)) 1488 wake_up_var(&net->servers_outstanding); 1489 } 1490 1491 static inline bool afs_is_probing_server(struct afs_server *server) 1492 { 1493 return list_empty(&server->probe_link); 1494 } 1495 1496 /* 1497 * server_list.c 1498 */ 1499 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) 1500 { 1501 refcount_inc(&slist->usage); 1502 return slist; 1503 } 1504 1505 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); 1506 struct afs_server_list *afs_alloc_server_list(struct afs_volume *volume, 1507 struct key *key, 1508 struct afs_vldb_entry *vldb); 1509 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); 1510 void afs_attach_volume_to_servers(struct afs_volume *volume, struct afs_server_list *slist); 1511 void afs_reattach_volume_to_servers(struct afs_volume *volume, struct afs_server_list *slist, 1512 struct afs_server_list *old); 1513 void afs_detach_volume_from_servers(struct afs_volume *volume, struct afs_server_list *slist); 1514 1515 /* 1516 * super.c 1517 */ 1518 extern int __init afs_fs_init(void); 1519 extern void afs_fs_exit(void); 1520 1521 /* 1522 * validation.c 1523 */ 1524 bool afs_check_validity(const struct afs_vnode *vnode); 1525 int afs_update_volume_state(struct afs_operation *op); 1526 int afs_validate(struct afs_vnode *vnode, struct key *key); 1527 1528 /* 1529 * vlclient.c 1530 */ 1531 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, 1532 const char *, int); 1533 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); 1534 struct afs_call *afs_vl_get_capabilities(struct afs_net *net, 1535 struct afs_addr_list *alist, 1536 unsigned int addr_index, 1537 struct key *key, 1538 struct afs_vlserver *server, 1539 unsigned int server_index); 1540 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); 1541 extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); 1542 1543 /* 1544 * vl_alias.c 1545 */ 1546 extern int afs_cell_detect_alias(struct afs_cell *, struct key *); 1547 1548 /* 1549 * vl_probe.c 1550 */ 1551 extern void afs_vlserver_probe_result(struct afs_call *); 1552 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); 1553 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); 1554 1555 /* 1556 * vl_rotate.c 1557 */ 1558 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, 1559 struct afs_cell *, struct key *); 1560 extern bool afs_select_vlserver(struct afs_vl_cursor *); 1561 extern bool afs_select_current_vlserver(struct afs_vl_cursor *); 1562 extern int afs_end_vlserver_operation(struct afs_vl_cursor *); 1563 1564 /* 1565 * vlserver_list.c 1566 */ 1567 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) 1568 { 1569 refcount_inc(&vlserver->ref); 1570 return vlserver; 1571 } 1572 1573 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) 1574 { 1575 if (vllist) 1576 refcount_inc(&vllist->ref); 1577 return vllist; 1578 } 1579 1580 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); 1581 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); 1582 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); 1583 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); 1584 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, 1585 const void *, size_t); 1586 1587 /* 1588 * volume.c 1589 */ 1590 extern struct afs_volume *afs_create_volume(struct afs_fs_context *); 1591 extern int afs_activate_volume(struct afs_volume *); 1592 extern void afs_deactivate_volume(struct afs_volume *); 1593 bool afs_try_get_volume(struct afs_volume *volume, enum afs_volume_trace reason); 1594 extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); 1595 void afs_put_volume(struct afs_volume *volume, enum afs_volume_trace reason); 1596 extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); 1597 1598 /* 1599 * write.c 1600 */ 1601 void afs_prepare_write(struct netfs_io_subrequest *subreq); 1602 void afs_issue_write(struct netfs_io_subrequest *subreq); 1603 void afs_begin_writeback(struct netfs_io_request *wreq); 1604 void afs_retry_request(struct netfs_io_request *wreq, struct netfs_io_stream *stream); 1605 extern int afs_writepages(struct address_space *, struct writeback_control *); 1606 extern int afs_fsync(struct file *, loff_t, loff_t, int); 1607 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); 1608 extern void afs_prune_wb_keys(struct afs_vnode *); 1609 1610 /* 1611 * xattr.c 1612 */ 1613 extern const struct xattr_handler * const afs_xattr_handlers[]; 1614 1615 /* 1616 * yfsclient.c 1617 */ 1618 extern void yfs_fs_fetch_data(struct afs_operation *); 1619 extern void yfs_fs_create_file(struct afs_operation *); 1620 extern void yfs_fs_make_dir(struct afs_operation *); 1621 extern void yfs_fs_remove_file2(struct afs_operation *); 1622 extern void yfs_fs_remove_file(struct afs_operation *); 1623 extern void yfs_fs_remove_dir(struct afs_operation *); 1624 extern void yfs_fs_link(struct afs_operation *); 1625 extern void yfs_fs_symlink(struct afs_operation *); 1626 extern void yfs_fs_rename(struct afs_operation *); 1627 extern void yfs_fs_store_data(struct afs_operation *); 1628 extern void yfs_fs_setattr(struct afs_operation *); 1629 extern void yfs_fs_get_volume_status(struct afs_operation *); 1630 extern void yfs_fs_set_lock(struct afs_operation *); 1631 extern void yfs_fs_extend_lock(struct afs_operation *); 1632 extern void yfs_fs_release_lock(struct afs_operation *); 1633 extern void yfs_fs_fetch_status(struct afs_operation *); 1634 extern void yfs_fs_inline_bulk_status(struct afs_operation *); 1635 1636 struct yfs_acl { 1637 struct afs_acl *acl; /* Dir/file/symlink ACL */ 1638 struct afs_acl *vol_acl; /* Whole volume ACL */ 1639 u32 inherit_flag; /* True if ACL is inherited from parent dir */ 1640 u32 num_cleaned; /* Number of ACEs removed due to subject removal */ 1641 unsigned int flags; 1642 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ 1643 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ 1644 }; 1645 1646 extern void yfs_free_opaque_acl(struct yfs_acl *); 1647 extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); 1648 extern void yfs_fs_store_opaque_acl2(struct afs_operation *); 1649 1650 /* 1651 * Miscellaneous inline functions. 1652 */ 1653 static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 1654 { 1655 return container_of(inode, struct afs_vnode, netfs.inode); 1656 } 1657 1658 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 1659 { 1660 return &vnode->netfs.inode; 1661 } 1662 1663 /* 1664 * Note that a dentry got changed. We need to set d_fsdata to the data version 1665 * number derived from the result of the operation. It doesn't matter if 1666 * d_fsdata goes backwards as we'll just revalidate. 1667 */ 1668 static inline void afs_update_dentry_version(struct afs_operation *op, 1669 struct afs_vnode_param *dir_vp, 1670 struct dentry *dentry) 1671 { 1672 if (!op->cumul_error.error) 1673 dentry->d_fsdata = 1674 (void *)(unsigned long)dir_vp->scb.status.data_version; 1675 } 1676 1677 /* 1678 * Set the file size and block count. Estimate the number of 512 bytes blocks 1679 * used, rounded up to nearest 1K for consistency with other AFS clients. 1680 */ 1681 static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size) 1682 { 1683 i_size_write(&vnode->netfs.inode, size); 1684 vnode->netfs.inode.i_blocks = ((size + 1023) >> 10) << 1; 1685 } 1686 1687 /* 1688 * Check for a conflicting operation on a directory that we just unlinked from. 1689 * If someone managed to sneak a link or an unlink in on the file we just 1690 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). 1691 */ 1692 static inline void afs_check_dir_conflict(struct afs_operation *op, 1693 struct afs_vnode_param *dvp) 1694 { 1695 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) 1696 op->flags |= AFS_OPERATION_DIR_CONFLICT; 1697 } 1698 1699 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) 1700 { 1701 trace_afs_io_error(call->debug_id, -EIO, where); 1702 return -EIO; 1703 } 1704 1705 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) 1706 { 1707 trace_afs_file_error(vnode, -EIO, where); 1708 return -EIO; 1709 } 1710 1711 /*****************************************************************************/ 1712 /* 1713 * debug tracing 1714 */ 1715 extern unsigned afs_debug; 1716 1717 #define dbgprintk(FMT,...) \ 1718 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1719 1720 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1721 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1722 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1723 1724 1725 #if defined(__KDEBUG) 1726 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1727 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1728 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1729 1730 #elif defined(CONFIG_AFS_DEBUG) 1731 #define AFS_DEBUG_KENTER 0x01 1732 #define AFS_DEBUG_KLEAVE 0x02 1733 #define AFS_DEBUG_KDEBUG 0x04 1734 1735 #define _enter(FMT,...) \ 1736 do { \ 1737 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 1738 kenter(FMT,##__VA_ARGS__); \ 1739 } while (0) 1740 1741 #define _leave(FMT,...) \ 1742 do { \ 1743 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 1744 kleave(FMT,##__VA_ARGS__); \ 1745 } while (0) 1746 1747 #define _debug(FMT,...) \ 1748 do { \ 1749 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 1750 kdebug(FMT,##__VA_ARGS__); \ 1751 } while (0) 1752 1753 #else 1754 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1755 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1756 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1757 #endif 1758 1759 /* 1760 * debug assertion checking 1761 */ 1762 #if 1 // defined(__KDEBUGALL) 1763 1764 #define ASSERT(X) \ 1765 do { \ 1766 if (unlikely(!(X))) { \ 1767 printk(KERN_ERR "\n"); \ 1768 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1769 BUG(); \ 1770 } \ 1771 } while(0) 1772 1773 #define ASSERTCMP(X, OP, Y) \ 1774 do { \ 1775 if (unlikely(!((X) OP (Y)))) { \ 1776 printk(KERN_ERR "\n"); \ 1777 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1778 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1779 (unsigned long)(X), (unsigned long)(Y)); \ 1780 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1781 (unsigned long)(X), (unsigned long)(Y)); \ 1782 BUG(); \ 1783 } \ 1784 } while(0) 1785 1786 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1787 do { \ 1788 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 1789 printk(KERN_ERR "\n"); \ 1790 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1791 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 1792 (unsigned long)(L), (unsigned long)(N), \ 1793 (unsigned long)(H)); \ 1794 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 1795 (unsigned long)(L), (unsigned long)(N), \ 1796 (unsigned long)(H)); \ 1797 BUG(); \ 1798 } \ 1799 } while(0) 1800 1801 #define ASSERTIF(C, X) \ 1802 do { \ 1803 if (unlikely((C) && !(X))) { \ 1804 printk(KERN_ERR "\n"); \ 1805 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1806 BUG(); \ 1807 } \ 1808 } while(0) 1809 1810 #define ASSERTIFCMP(C, X, OP, Y) \ 1811 do { \ 1812 if (unlikely((C) && !((X) OP (Y)))) { \ 1813 printk(KERN_ERR "\n"); \ 1814 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1815 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1816 (unsigned long)(X), (unsigned long)(Y)); \ 1817 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1818 (unsigned long)(X), (unsigned long)(Y)); \ 1819 BUG(); \ 1820 } \ 1821 } while(0) 1822 1823 #else 1824 1825 #define ASSERT(X) \ 1826 do { \ 1827 } while(0) 1828 1829 #define ASSERTCMP(X, OP, Y) \ 1830 do { \ 1831 } while(0) 1832 1833 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1834 do { \ 1835 } while(0) 1836 1837 #define ASSERTIF(C, X) \ 1838 do { \ 1839 } while(0) 1840 1841 #define ASSERTIFCMP(C, X, OP, Y) \ 1842 do { \ 1843 } while(0) 1844 1845 #endif /* __KDEBUGALL */ 1846