1 /* internal AFS stuff 2 * 3 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12 #include <linux/compiler.h> 13 #include <linux/kernel.h> 14 #include <linux/ktime.h> 15 #include <linux/fs.h> 16 #include <linux/pagemap.h> 17 #include <linux/rxrpc.h> 18 #include <linux/key.h> 19 #include <linux/workqueue.h> 20 #include <linux/sched.h> 21 #include <linux/fscache.h> 22 #include <linux/backing-dev.h> 23 #include <linux/uuid.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 37 struct afs_mount_params { 38 bool rwpath; /* T if the parent should be considered R/W */ 39 bool force; /* T to force cell type */ 40 bool autocell; /* T if set auto mount operation */ 41 bool dyn_root; /* T if dynamic root */ 42 afs_voltype_t type; /* type of volume requested */ 43 int volnamesz; /* size of volume name */ 44 const char *volname; /* name of volume to mount */ 45 struct net *net_ns; /* Network namespace in effect */ 46 struct afs_net *net; /* the AFS net namespace stuff */ 47 struct afs_cell *cell; /* cell in which to find volume */ 48 struct afs_volume *volume; /* volume record */ 49 struct key *key; /* key to use for secure mounting */ 50 }; 51 52 struct afs_iget_data { 53 struct afs_fid fid; 54 struct afs_volume *volume; /* volume on which resides */ 55 }; 56 57 enum afs_call_state { 58 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ 59 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ 60 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ 61 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ 62 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ 63 AFS_CALL_SV_REPLYING, /* Server: Replying */ 64 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ 65 AFS_CALL_COMPLETE, /* Completed or failed */ 66 }; 67 68 /* 69 * List of server addresses. 70 */ 71 struct afs_addr_list { 72 struct rcu_head rcu; /* Must be first */ 73 refcount_t usage; 74 u32 version; /* Version */ 75 unsigned short nr_addrs; 76 unsigned short index; /* Address currently in use */ 77 unsigned short nr_ipv4; /* Number of IPv4 addresses */ 78 unsigned long probed; /* Mask of servers that have been probed */ 79 unsigned long yfs; /* Mask of servers that are YFS */ 80 struct sockaddr_rxrpc addrs[]; 81 }; 82 83 /* 84 * a record of an in-progress RxRPC call 85 */ 86 struct afs_call { 87 const struct afs_call_type *type; /* type of call */ 88 wait_queue_head_t waitq; /* processes awaiting completion */ 89 struct work_struct async_work; /* async I/O processor */ 90 struct work_struct work; /* actual work processor */ 91 struct rxrpc_call *rxcall; /* RxRPC call handle */ 92 struct key *key; /* security for this call */ 93 struct afs_net *net; /* The network namespace */ 94 struct afs_server *cm_server; /* Server affected by incoming CM call */ 95 struct afs_cb_interest *cbi; /* Callback interest for server used */ 96 void *request; /* request data (first part) */ 97 struct address_space *mapping; /* Pages being written from */ 98 void *buffer; /* reply receive buffer */ 99 void *reply[4]; /* Where to put the reply */ 100 pgoff_t first; /* first page in mapping to deal with */ 101 pgoff_t last; /* last page in mapping to deal with */ 102 size_t offset; /* offset into received data store */ 103 atomic_t usage; 104 enum afs_call_state state; 105 spinlock_t state_lock; 106 int error; /* error code */ 107 u32 abort_code; /* Remote abort ID or 0 */ 108 unsigned request_size; /* size of request data */ 109 unsigned reply_max; /* maximum size of reply */ 110 unsigned first_offset; /* offset into mapping[first] */ 111 unsigned int cb_break; /* cb_break + cb_s_break before the call */ 112 union { 113 unsigned last_to; /* amount of mapping[last] */ 114 unsigned count2; /* count used in unmarshalling */ 115 }; 116 unsigned char unmarshall; /* unmarshalling phase */ 117 bool incoming; /* T if incoming call */ 118 bool send_pages; /* T if data from mapping should be sent */ 119 bool need_attention; /* T if RxRPC poked us */ 120 bool async; /* T if asynchronous */ 121 bool ret_reply0; /* T if should return reply[0] on success */ 122 bool upgrade; /* T to request service upgrade */ 123 u16 service_id; /* Actual service ID (after upgrade) */ 124 unsigned int debug_id; /* Trace ID */ 125 u32 operation_ID; /* operation ID for an incoming call */ 126 u32 count; /* count for use in unmarshalling */ 127 __be32 tmp; /* place to extract temporary data */ 128 afs_dataversion_t expected_version; /* Updated version expected from store */ 129 afs_dataversion_t expected_version_2; /* 2nd updated version expected from store */ 130 }; 131 132 struct afs_call_type { 133 const char *name; 134 unsigned int op; /* Really enum afs_fs_operation */ 135 136 /* deliver request or reply data to an call 137 * - returning an error will cause the call to be aborted 138 */ 139 int (*deliver)(struct afs_call *call); 140 141 /* clean up a call */ 142 void (*destructor)(struct afs_call *call); 143 144 /* Work function */ 145 void (*work)(struct work_struct *work); 146 }; 147 148 /* 149 * Key available for writeback on a file. 150 */ 151 struct afs_wb_key { 152 refcount_t usage; 153 struct key *key; 154 struct list_head vnode_link; /* Link in vnode->wb_keys */ 155 }; 156 157 /* 158 * AFS open file information record. Pointed to by file->private_data. 159 */ 160 struct afs_file { 161 struct key *key; /* The key this file was opened with */ 162 struct afs_wb_key *wb; /* Writeback key record for this file */ 163 }; 164 165 static inline struct key *afs_file_key(struct file *file) 166 { 167 struct afs_file *af = file->private_data; 168 169 return af->key; 170 } 171 172 /* 173 * Record of an outstanding read operation on a vnode. 174 */ 175 struct afs_read { 176 loff_t pos; /* Where to start reading */ 177 loff_t len; /* How much we're asking for */ 178 loff_t actual_len; /* How much we're actually getting */ 179 loff_t remain; /* Amount remaining */ 180 loff_t file_size; /* File size returned by server */ 181 afs_dataversion_t data_version; /* Version number returned by server */ 182 refcount_t usage; 183 unsigned int index; /* Which page we're reading into */ 184 unsigned int nr_pages; 185 void (*page_done)(struct afs_call *, struct afs_read *); 186 struct page **pages; 187 struct page *array[]; 188 }; 189 190 /* 191 * AFS superblock private data 192 * - there's one superblock per volume 193 */ 194 struct afs_super_info { 195 struct net *net_ns; /* Network namespace */ 196 struct afs_cell *cell; /* The cell in which the volume resides */ 197 struct afs_volume *volume; /* volume record */ 198 bool dyn_root; /* True if dynamic root */ 199 }; 200 201 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) 202 { 203 return sb->s_fs_info; 204 } 205 206 extern struct file_system_type afs_fs_type; 207 208 /* 209 * Set of substitutes for @sys. 210 */ 211 struct afs_sysnames { 212 #define AFS_NR_SYSNAME 16 213 char *subs[AFS_NR_SYSNAME]; 214 refcount_t usage; 215 unsigned short nr; 216 char blank[1]; 217 }; 218 219 /* 220 * AFS network namespace record. 221 */ 222 struct afs_net { 223 struct net *net; /* Backpointer to the owning net namespace */ 224 struct afs_uuid uuid; 225 bool live; /* F if this namespace is being removed */ 226 227 /* AF_RXRPC I/O stuff */ 228 struct socket *socket; 229 struct afs_call *spare_incoming_call; 230 struct work_struct charge_preallocation_work; 231 struct mutex socket_mutex; 232 atomic_t nr_outstanding_calls; 233 atomic_t nr_superblocks; 234 235 /* Cell database */ 236 struct rb_root cells; 237 struct afs_cell __rcu *ws_cell; 238 struct work_struct cells_manager; 239 struct timer_list cells_timer; 240 atomic_t cells_outstanding; 241 seqlock_t cells_lock; 242 243 struct mutex proc_cells_lock; 244 struct list_head proc_cells; 245 246 /* Known servers. Theoretically each fileserver can only be in one 247 * cell, but in practice, people create aliases and subsets and there's 248 * no easy way to distinguish them. 249 */ 250 seqlock_t fs_lock; /* For fs_servers */ 251 struct rb_root fs_servers; /* afs_server (by server UUID or address) */ 252 struct list_head fs_updates; /* afs_server (by update_at) */ 253 struct hlist_head fs_proc; /* procfs servers list */ 254 255 struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ 256 struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */ 257 seqlock_t fs_addr_lock; /* For fs_addresses[46] */ 258 259 struct work_struct fs_manager; 260 struct timer_list fs_timer; 261 atomic_t servers_outstanding; 262 263 /* File locking renewal management */ 264 struct mutex lock_manager_mutex; 265 266 /* Misc */ 267 struct super_block *dynroot_sb; /* Dynamic root mount superblock */ 268 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ 269 struct afs_sysnames *sysnames; 270 rwlock_t sysnames_lock; 271 272 /* Statistics counters */ 273 atomic_t n_lookup; /* Number of lookups done */ 274 atomic_t n_reval; /* Number of dentries needing revalidation */ 275 atomic_t n_inval; /* Number of invalidations by the server */ 276 atomic_t n_relpg; /* Number of invalidations by releasepage */ 277 atomic_t n_read_dir; /* Number of directory pages read */ 278 atomic_t n_dir_cr; /* Number of directory entry creation edits */ 279 atomic_t n_dir_rm; /* Number of directory entry removal edits */ 280 atomic_t n_stores; /* Number of store ops */ 281 atomic_long_t n_store_bytes; /* Number of bytes stored */ 282 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ 283 atomic_t n_fetches; /* Number of data fetch ops */ 284 }; 285 286 extern const char afs_init_sysname[]; 287 288 enum afs_cell_state { 289 AFS_CELL_UNSET, 290 AFS_CELL_ACTIVATING, 291 AFS_CELL_ACTIVE, 292 AFS_CELL_DEACTIVATING, 293 AFS_CELL_INACTIVE, 294 AFS_CELL_FAILED, 295 }; 296 297 /* 298 * AFS cell record. 299 * 300 * This is a tricky concept to get right as it is possible to create aliases 301 * simply by pointing AFSDB/SRV records for two names at the same set of VL 302 * servers; it is also possible to do things like setting up two sets of VL 303 * servers, one of which provides a superset of the volumes provided by the 304 * other (for internal/external division, for example). 305 * 306 * Cells only exist in the sense that (a) a cell's name maps to a set of VL 307 * servers and (b) a cell's name is used by the client to select the key to use 308 * for authentication and encryption. The cell name is not typically used in 309 * the protocol. 310 * 311 * There is no easy way to determine if two cells are aliases or one is a 312 * subset of another. 313 */ 314 struct afs_cell { 315 union { 316 struct rcu_head rcu; 317 struct rb_node net_node; /* Node in net->cells */ 318 }; 319 struct afs_net *net; 320 struct key *anonymous_key; /* anonymous user key for this cell */ 321 struct work_struct manager; /* Manager for init/deinit/dns */ 322 struct list_head proc_link; /* /proc cell list link */ 323 #ifdef CONFIG_AFS_FSCACHE 324 struct fscache_cookie *cache; /* caching cookie */ 325 #endif 326 time64_t dns_expiry; /* Time AFSDB/SRV record expires */ 327 time64_t last_inactive; /* Time of last drop of usage count */ 328 atomic_t usage; 329 unsigned long flags; 330 #define AFS_CELL_FL_NOT_READY 0 /* The cell record is not ready for use */ 331 #define AFS_CELL_FL_NO_GC 1 /* The cell was added manually, don't auto-gc */ 332 #define AFS_CELL_FL_NOT_FOUND 2 /* Permanent DNS error */ 333 #define AFS_CELL_FL_DNS_FAIL 3 /* Failed to access DNS */ 334 #define AFS_CELL_FL_NO_LOOKUP_YET 4 /* Not completed first DNS lookup yet */ 335 enum afs_cell_state state; 336 short error; 337 338 /* Active fileserver interaction state. */ 339 struct list_head proc_volumes; /* procfs volume list */ 340 rwlock_t proc_lock; 341 342 /* VL server list. */ 343 rwlock_t vl_addrs_lock; /* Lock on vl_addrs */ 344 struct afs_addr_list __rcu *vl_addrs; /* List of VL servers */ 345 u8 name_len; /* Length of name */ 346 char name[64 + 1]; /* Cell name, case-flattened and NUL-padded */ 347 }; 348 349 /* 350 * Cached VLDB entry. 351 * 352 * This is pointed to by cell->vldb_entries, indexed by name. 353 */ 354 struct afs_vldb_entry { 355 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ 356 357 unsigned long flags; 358 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ 359 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ 360 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ 361 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ 362 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ 363 364 uuid_t fs_server[AFS_NMAXNSERVERS]; 365 u8 fs_mask[AFS_NMAXNSERVERS]; 366 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 367 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 368 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 369 short error; 370 u8 nr_servers; /* Number of server records */ 371 u8 name_len; 372 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 373 }; 374 375 /* 376 * Record of fileserver with which we're actively communicating. 377 */ 378 struct afs_server { 379 struct rcu_head rcu; 380 union { 381 uuid_t uuid; /* Server ID */ 382 struct afs_uuid _uuid; 383 }; 384 385 struct afs_addr_list __rcu *addresses; 386 struct rb_node uuid_rb; /* Link in net->servers */ 387 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ 388 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ 389 struct hlist_node proc_link; /* Link in net->fs_proc */ 390 struct afs_server *gc_next; /* Next server in manager's list */ 391 time64_t put_time; /* Time at which last put */ 392 time64_t update_at; /* Time at which to next update the record */ 393 unsigned long flags; 394 #define AFS_SERVER_FL_NEW 0 /* New server, don't inc cb_s_break */ 395 #define AFS_SERVER_FL_NOT_READY 1 /* The record is not ready for use */ 396 #define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */ 397 #define AFS_SERVER_FL_VL_FAIL 3 /* Failed to access VL server */ 398 #define AFS_SERVER_FL_UPDATING 4 399 #define AFS_SERVER_FL_PROBED 5 /* The fileserver has been probed */ 400 #define AFS_SERVER_FL_PROBING 6 /* Fileserver is being probed */ 401 #define AFS_SERVER_FL_NO_IBULK 7 /* Fileserver doesn't support FS.InlineBulkStatus */ 402 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ 403 atomic_t usage; 404 u32 addr_version; /* Address list version */ 405 406 /* file service access */ 407 rwlock_t fs_lock; /* access lock */ 408 409 /* callback promise management */ 410 struct hlist_head cb_volumes; /* List of volume interests on this server */ 411 unsigned cb_s_break; /* Break-everything counter. */ 412 rwlock_t cb_break_lock; /* Volume finding lock */ 413 }; 414 415 /* 416 * Volume collation in the server's callback interest list. 417 */ 418 struct afs_vol_interest { 419 struct hlist_node srv_link; /* Link in server->cb_volumes */ 420 struct hlist_head cb_interests; /* List of callback interests on the server */ 421 afs_volid_t vid; /* Volume ID to match */ 422 unsigned int usage; 423 }; 424 425 /* 426 * Interest by a superblock on a server. 427 */ 428 struct afs_cb_interest { 429 struct hlist_node cb_vlink; /* Link in vol_interest->cb_interests */ 430 struct afs_vol_interest *vol_interest; 431 struct afs_server *server; /* Server on which this interest resides */ 432 struct super_block *sb; /* Superblock on which inodes reside */ 433 afs_volid_t vid; /* Volume ID to match */ 434 refcount_t usage; 435 }; 436 437 /* 438 * Replaceable server list. 439 */ 440 struct afs_server_entry { 441 struct afs_server *server; 442 struct afs_cb_interest *cb_interest; 443 }; 444 445 struct afs_server_list { 446 refcount_t usage; 447 unsigned short nr_servers; 448 unsigned short index; /* Server currently in use */ 449 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ 450 unsigned int seq; /* Set to ->servers_seq when installed */ 451 rwlock_t lock; 452 struct afs_server_entry servers[]; 453 }; 454 455 /* 456 * Live AFS volume management. 457 */ 458 struct afs_volume { 459 afs_volid_t vid; /* volume ID */ 460 atomic_t usage; 461 time64_t update_at; /* Time at which to next update */ 462 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 463 struct list_head proc_link; /* Link in cell->vl_proc */ 464 unsigned long flags; 465 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ 466 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ 467 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ 468 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ 469 #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ 470 #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ 471 #ifdef CONFIG_AFS_FSCACHE 472 struct fscache_cookie *cache; /* caching cookie */ 473 #endif 474 struct afs_server_list *servers; /* List of servers on which volume resides */ 475 rwlock_t servers_lock; /* Lock for ->servers */ 476 unsigned int servers_seq; /* Incremented each time ->servers changes */ 477 478 unsigned cb_v_break; /* Break-everything counter. */ 479 rwlock_t cb_break_lock; 480 481 afs_voltype_t type; /* type of volume */ 482 short error; 483 char type_force; /* force volume type (suppress R/O -> R/W) */ 484 u8 name_len; 485 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 486 }; 487 488 enum afs_lock_state { 489 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ 490 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ 491 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ 492 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ 493 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ 494 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ 495 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ 496 }; 497 498 /* 499 * AFS inode private data. 500 * 501 * Note that afs_alloc_inode() *must* reset anything that could incorrectly 502 * leak from one inode to another. 503 */ 504 struct afs_vnode { 505 struct inode vfs_inode; /* the VFS's inode record */ 506 507 struct afs_volume *volume; /* volume on which vnode resides */ 508 struct afs_fid fid; /* the file identifier for this inode */ 509 struct afs_file_status status; /* AFS status info for this file */ 510 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ 511 #ifdef CONFIG_AFS_FSCACHE 512 struct fscache_cookie *cache; /* caching cookie */ 513 #endif 514 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ 515 struct mutex io_lock; /* Lock for serialising I/O on this mutex */ 516 struct rw_semaphore validate_lock; /* lock for validating this vnode */ 517 spinlock_t wb_lock; /* lock for wb_keys */ 518 spinlock_t lock; /* waitqueue/flags lock */ 519 unsigned long flags; 520 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ 521 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 522 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ 523 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 524 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 525 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 526 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ 527 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ 528 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ 529 530 struct list_head wb_keys; /* List of keys available for writeback */ 531 struct list_head pending_locks; /* locks waiting to be granted */ 532 struct list_head granted_locks; /* locks granted on this file */ 533 struct delayed_work lock_work; /* work to be done in locking */ 534 struct key *lock_key; /* Key to be used in lock ops */ 535 enum afs_lock_state lock_state : 8; 536 afs_lock_type_t lock_type : 8; 537 538 /* outstanding callback notification on this file */ 539 struct afs_cb_interest *cb_interest; /* Server on which this resides */ 540 unsigned int cb_s_break; /* Mass break counter on ->server */ 541 unsigned int cb_v_break; /* Mass break counter on ->volume */ 542 unsigned int cb_break; /* Break counter on vnode */ 543 seqlock_t cb_lock; /* Lock for ->cb_interest, ->status, ->cb_*break */ 544 545 time64_t cb_expires_at; /* time at which callback expires */ 546 unsigned cb_version; /* callback version */ 547 afs_callback_type_t cb_type; /* type of callback */ 548 }; 549 550 /* 551 * cached security record for one user's attempt to access a vnode 552 */ 553 struct afs_permit { 554 struct key *key; /* RxRPC ticket holding a security context */ 555 afs_access_t access; /* CallerAccess value for this key */ 556 }; 557 558 /* 559 * Immutable cache of CallerAccess records from attempts to access vnodes. 560 * These may be shared between multiple vnodes. 561 */ 562 struct afs_permits { 563 struct rcu_head rcu; 564 struct hlist_node hash_node; /* Link in hash */ 565 unsigned long h; /* Hash value for this permit list */ 566 refcount_t usage; 567 unsigned short nr_permits; /* Number of records */ 568 bool invalidated; /* Invalidated due to key change */ 569 struct afs_permit permits[]; /* List of permits sorted by key pointer */ 570 }; 571 572 /* 573 * record of one of a system's set of network interfaces 574 */ 575 struct afs_interface { 576 struct in_addr address; /* IPv4 address bound to interface */ 577 struct in_addr netmask; /* netmask applied to address */ 578 unsigned mtu; /* MTU of interface */ 579 }; 580 581 /* 582 * Cursor for iterating over a server's address list. 583 */ 584 struct afs_addr_cursor { 585 struct afs_addr_list *alist; /* Current address list (pins ref) */ 586 struct sockaddr_rxrpc *addr; 587 u32 abort_code; 588 unsigned short start; /* Starting point in alist->addrs[] */ 589 unsigned short index; /* Wrapping offset from start to current addr */ 590 short error; 591 bool begun; /* T if we've begun iteration */ 592 bool responded; /* T if the current address responded */ 593 }; 594 595 /* 596 * Cursor for iterating over a set of fileservers. 597 */ 598 struct afs_fs_cursor { 599 struct afs_addr_cursor ac; 600 struct afs_vnode *vnode; 601 struct afs_server_list *server_list; /* Current server list (pins ref) */ 602 struct afs_cb_interest *cbi; /* Server on which this resides (pins ref) */ 603 struct key *key; /* Key for the server */ 604 unsigned int cb_break; /* cb_break + cb_s_break before the call */ 605 unsigned int cb_break_2; /* cb_break + cb_s_break (2nd vnode) */ 606 unsigned char start; /* Initial index in server list */ 607 unsigned char index; /* Number of servers tried beyond start */ 608 unsigned short flags; 609 #define AFS_FS_CURSOR_STOP 0x0001 /* Set to cease iteration */ 610 #define AFS_FS_CURSOR_VBUSY 0x0002 /* Set if seen VBUSY */ 611 #define AFS_FS_CURSOR_VMOVED 0x0004 /* Set if seen VMOVED */ 612 #define AFS_FS_CURSOR_VNOVOL 0x0008 /* Set if seen VNOVOL */ 613 #define AFS_FS_CURSOR_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ 614 #define AFS_FS_CURSOR_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ 615 }; 616 617 /* 618 * Cache auxiliary data. 619 */ 620 struct afs_vnode_cache_aux { 621 u64 data_version; 622 } __packed; 623 624 #include <trace/events/afs.h> 625 626 /*****************************************************************************/ 627 /* 628 * addr_list.c 629 */ 630 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) 631 { 632 if (alist) 633 refcount_inc(&alist->usage); 634 return alist; 635 } 636 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, 637 unsigned short, 638 unsigned short); 639 extern void afs_put_addrlist(struct afs_addr_list *); 640 extern struct afs_addr_list *afs_parse_text_addrs(const char *, size_t, char, 641 unsigned short, unsigned short); 642 extern struct afs_addr_list *afs_dns_query(struct afs_cell *, time64_t *); 643 extern bool afs_iterate_addresses(struct afs_addr_cursor *); 644 extern int afs_end_cursor(struct afs_addr_cursor *); 645 extern int afs_set_vl_cursor(struct afs_addr_cursor *, struct afs_cell *); 646 647 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); 648 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); 649 650 /* 651 * cache.c 652 */ 653 #ifdef CONFIG_AFS_FSCACHE 654 extern struct fscache_netfs afs_cache_netfs; 655 extern struct fscache_cookie_def afs_cell_cache_index_def; 656 extern struct fscache_cookie_def afs_volume_cache_index_def; 657 extern struct fscache_cookie_def afs_vnode_cache_index_def; 658 #else 659 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) 660 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) 661 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) 662 #endif 663 664 /* 665 * callback.c 666 */ 667 extern void afs_init_callback_state(struct afs_server *); 668 extern void afs_break_callback(struct afs_vnode *); 669 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break*); 670 671 extern int afs_register_server_cb_interest(struct afs_vnode *, 672 struct afs_server_list *, unsigned int); 673 extern void afs_put_cb_interest(struct afs_net *, struct afs_cb_interest *); 674 extern void afs_clear_callback_interests(struct afs_net *, struct afs_server_list *); 675 676 static inline struct afs_cb_interest *afs_get_cb_interest(struct afs_cb_interest *cbi) 677 { 678 if (cbi) 679 refcount_inc(&cbi->usage); 680 return cbi; 681 } 682 683 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) 684 { 685 return vnode->cb_break + vnode->cb_s_break + vnode->cb_v_break; 686 } 687 688 static inline unsigned int afs_cb_break_sum(struct afs_vnode *vnode, 689 struct afs_cb_interest *cbi) 690 { 691 return vnode->cb_break + cbi->server->cb_s_break + vnode->volume->cb_v_break; 692 } 693 694 /* 695 * cell.c 696 */ 697 extern int afs_cell_init(struct afs_net *, const char *); 698 extern struct afs_cell *afs_lookup_cell_rcu(struct afs_net *, const char *, unsigned); 699 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, 700 const char *, bool); 701 extern struct afs_cell *afs_get_cell(struct afs_cell *); 702 extern void afs_put_cell(struct afs_net *, struct afs_cell *); 703 extern void afs_manage_cells(struct work_struct *); 704 extern void afs_cells_timer(struct timer_list *); 705 extern void __net_exit afs_cell_purge(struct afs_net *); 706 707 /* 708 * cmservice.c 709 */ 710 extern bool afs_cm_incoming_call(struct afs_call *); 711 712 /* 713 * dir.c 714 */ 715 extern const struct file_operations afs_dir_file_operations; 716 extern const struct inode_operations afs_dir_inode_operations; 717 extern const struct address_space_operations afs_dir_aops; 718 extern const struct dentry_operations afs_fs_dentry_operations; 719 720 extern void afs_d_release(struct dentry *); 721 722 /* 723 * dir_edit.c 724 */ 725 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, 726 enum afs_edit_dir_reason); 727 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); 728 729 /* 730 * dynroot.c 731 */ 732 extern const struct file_operations afs_dynroot_file_operations; 733 extern const struct inode_operations afs_dynroot_inode_operations; 734 extern const struct dentry_operations afs_dynroot_dentry_operations; 735 736 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); 737 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); 738 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); 739 extern int afs_dynroot_populate(struct super_block *); 740 extern void afs_dynroot_depopulate(struct super_block *); 741 742 /* 743 * file.c 744 */ 745 extern const struct address_space_operations afs_fs_aops; 746 extern const struct inode_operations afs_file_inode_operations; 747 extern const struct file_operations afs_file_operations; 748 749 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); 750 extern void afs_put_wb_key(struct afs_wb_key *); 751 extern int afs_open(struct inode *, struct file *); 752 extern int afs_release(struct inode *, struct file *); 753 extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *); 754 extern int afs_page_filler(void *, struct page *); 755 extern void afs_put_read(struct afs_read *); 756 757 /* 758 * flock.c 759 */ 760 extern struct workqueue_struct *afs_lock_manager; 761 762 extern void afs_lock_work(struct work_struct *); 763 extern void afs_lock_may_be_available(struct afs_vnode *); 764 extern int afs_lock(struct file *, int, struct file_lock *); 765 extern int afs_flock(struct file *, int, struct file_lock *); 766 767 /* 768 * fsclient.c 769 */ 770 #define AFS_VNODE_NOT_YET_SET 0x01 771 #define AFS_VNODE_META_CHANGED 0x02 772 #define AFS_VNODE_DATA_CHANGED 0x04 773 extern void afs_update_inode_from_status(struct afs_vnode *, struct afs_file_status *, 774 const afs_dataversion_t *, u8); 775 776 extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *, bool); 777 extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *); 778 extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *); 779 extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t, u64, 780 struct afs_fid *, struct afs_file_status *, struct afs_callback *); 781 extern int afs_fs_remove(struct afs_fs_cursor *, const char *, bool, u64); 782 extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64); 783 extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, u64, 784 struct afs_fid *, struct afs_file_status *); 785 extern int afs_fs_rename(struct afs_fs_cursor *, const char *, 786 struct afs_vnode *, const char *, u64, u64); 787 extern int afs_fs_store_data(struct afs_fs_cursor *, struct address_space *, 788 pgoff_t, pgoff_t, unsigned, unsigned); 789 extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *); 790 extern int afs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *); 791 extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t); 792 extern int afs_fs_extend_lock(struct afs_fs_cursor *); 793 extern int afs_fs_release_lock(struct afs_fs_cursor *); 794 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, 795 struct afs_addr_cursor *, struct key *); 796 extern int afs_fs_get_capabilities(struct afs_net *, struct afs_server *, 797 struct afs_addr_cursor *, struct key *); 798 extern int afs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *, 799 struct afs_fid *, struct afs_file_status *, 800 struct afs_callback *, unsigned int, 801 struct afs_volsync *); 802 extern int afs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *, 803 struct afs_fid *, struct afs_file_status *, 804 struct afs_callback *, struct afs_volsync *); 805 806 /* 807 * inode.c 808 */ 809 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool); 810 extern int afs_iget5_test(struct inode *, void *); 811 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); 812 extern struct inode *afs_iget(struct super_block *, struct key *, 813 struct afs_fid *, struct afs_file_status *, 814 struct afs_callback *, 815 struct afs_cb_interest *); 816 extern void afs_zap_data(struct afs_vnode *); 817 extern int afs_validate(struct afs_vnode *, struct key *); 818 extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); 819 extern int afs_setattr(struct dentry *, struct iattr *); 820 extern void afs_evict_inode(struct inode *); 821 extern int afs_drop_inode(struct inode *); 822 823 /* 824 * main.c 825 */ 826 extern struct workqueue_struct *afs_wq; 827 extern int afs_net_id; 828 829 static inline struct afs_net *afs_net(struct net *net) 830 { 831 return net_generic(net, afs_net_id); 832 } 833 834 static inline struct afs_net *afs_sb2net(struct super_block *sb) 835 { 836 return afs_net(AFS_FS_S(sb)->net_ns); 837 } 838 839 static inline struct afs_net *afs_d2net(struct dentry *dentry) 840 { 841 return afs_sb2net(dentry->d_sb); 842 } 843 844 static inline struct afs_net *afs_i2net(struct inode *inode) 845 { 846 return afs_sb2net(inode->i_sb); 847 } 848 849 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 850 { 851 return afs_i2net(&vnode->vfs_inode); 852 } 853 854 static inline struct afs_net *afs_sock2net(struct sock *sk) 855 { 856 return net_generic(sock_net(sk), afs_net_id); 857 } 858 859 static inline void __afs_stat(atomic_t *s) 860 { 861 atomic_inc(s); 862 } 863 864 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) 865 866 /* 867 * misc.c 868 */ 869 extern int afs_abort_to_error(u32); 870 871 /* 872 * mntpt.c 873 */ 874 extern const struct inode_operations afs_mntpt_inode_operations; 875 extern const struct inode_operations afs_autocell_inode_operations; 876 extern const struct file_operations afs_mntpt_file_operations; 877 878 extern struct vfsmount *afs_d_automount(struct path *); 879 extern void afs_mntpt_kill_timer(void); 880 881 /* 882 * netdevices.c 883 */ 884 extern int afs_get_ipv4_interfaces(struct afs_net *, struct afs_interface *, 885 size_t, bool); 886 887 /* 888 * proc.c 889 */ 890 #ifdef CONFIG_PROC_FS 891 extern int __net_init afs_proc_init(struct afs_net *); 892 extern void __net_exit afs_proc_cleanup(struct afs_net *); 893 extern int afs_proc_cell_setup(struct afs_cell *); 894 extern void afs_proc_cell_remove(struct afs_cell *); 895 extern void afs_put_sysnames(struct afs_sysnames *); 896 #else 897 static inline int afs_proc_init(struct afs_net *net) { return 0; } 898 static inline void afs_proc_cleanup(struct afs_net *net) {} 899 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } 900 static inline void afs_proc_cell_remove(struct afs_cell *cell) {} 901 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} 902 #endif 903 904 /* 905 * rotate.c 906 */ 907 extern bool afs_begin_vnode_operation(struct afs_fs_cursor *, struct afs_vnode *, 908 struct key *); 909 extern bool afs_select_fileserver(struct afs_fs_cursor *); 910 extern bool afs_select_current_fileserver(struct afs_fs_cursor *); 911 extern int afs_end_vnode_operation(struct afs_fs_cursor *); 912 913 /* 914 * rxrpc.c 915 */ 916 extern struct workqueue_struct *afs_async_calls; 917 918 extern int __net_init afs_open_socket(struct afs_net *); 919 extern void __net_exit afs_close_socket(struct afs_net *); 920 extern void afs_charge_preallocation(struct work_struct *); 921 extern void afs_put_call(struct afs_call *); 922 extern int afs_queue_call_work(struct afs_call *); 923 extern long afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t, bool); 924 extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 925 const struct afs_call_type *, 926 size_t, size_t); 927 extern void afs_flat_call_destructor(struct afs_call *); 928 extern void afs_send_empty_reply(struct afs_call *); 929 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 930 extern int afs_extract_data(struct afs_call *, void *, size_t, bool); 931 extern int afs_protocol_error(struct afs_call *, int); 932 933 static inline int afs_transfer_reply(struct afs_call *call) 934 { 935 return afs_extract_data(call, call->buffer, call->reply_max, false); 936 } 937 938 static inline bool afs_check_call_state(struct afs_call *call, 939 enum afs_call_state state) 940 { 941 return READ_ONCE(call->state) == state; 942 } 943 944 static inline bool afs_set_call_state(struct afs_call *call, 945 enum afs_call_state from, 946 enum afs_call_state to) 947 { 948 bool ok = false; 949 950 spin_lock_bh(&call->state_lock); 951 if (call->state == from) { 952 call->state = to; 953 trace_afs_call_state(call, from, to, 0, 0); 954 ok = true; 955 } 956 spin_unlock_bh(&call->state_lock); 957 return ok; 958 } 959 960 static inline void afs_set_call_complete(struct afs_call *call, 961 int error, u32 remote_abort) 962 { 963 enum afs_call_state state; 964 bool ok = false; 965 966 spin_lock_bh(&call->state_lock); 967 state = call->state; 968 if (state != AFS_CALL_COMPLETE) { 969 call->abort_code = remote_abort; 970 call->error = error; 971 call->state = AFS_CALL_COMPLETE; 972 trace_afs_call_state(call, state, AFS_CALL_COMPLETE, 973 error, remote_abort); 974 ok = true; 975 } 976 spin_unlock_bh(&call->state_lock); 977 if (ok) 978 trace_afs_call_done(call); 979 } 980 981 /* 982 * security.c 983 */ 984 extern void afs_put_permits(struct afs_permits *); 985 extern void afs_clear_permits(struct afs_vnode *); 986 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int); 987 extern void afs_zap_permits(struct rcu_head *); 988 extern struct key *afs_request_key(struct afs_cell *); 989 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); 990 extern int afs_permission(struct inode *, int); 991 extern void __exit afs_clean_up_permit_cache(void); 992 993 /* 994 * server.c 995 */ 996 extern spinlock_t afs_server_peer_lock; 997 998 static inline struct afs_server *afs_get_server(struct afs_server *server) 999 { 1000 atomic_inc(&server->usage); 1001 return server; 1002 } 1003 1004 extern struct afs_server *afs_find_server(struct afs_net *, 1005 const struct sockaddr_rxrpc *); 1006 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); 1007 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *); 1008 extern void afs_put_server(struct afs_net *, struct afs_server *); 1009 extern void afs_manage_servers(struct work_struct *); 1010 extern void afs_servers_timer(struct timer_list *); 1011 extern void __net_exit afs_purge_servers(struct afs_net *); 1012 extern bool afs_probe_fileserver(struct afs_fs_cursor *); 1013 extern bool afs_check_server_record(struct afs_fs_cursor *, struct afs_server *); 1014 1015 /* 1016 * server_list.c 1017 */ 1018 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) 1019 { 1020 refcount_inc(&slist->usage); 1021 return slist; 1022 } 1023 1024 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); 1025 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, 1026 struct afs_vldb_entry *, 1027 u8); 1028 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); 1029 1030 /* 1031 * super.c 1032 */ 1033 extern int __init afs_fs_init(void); 1034 extern void afs_fs_exit(void); 1035 1036 /* 1037 * vlclient.c 1038 */ 1039 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_net *, 1040 struct afs_addr_cursor *, 1041 struct key *, const char *, int); 1042 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_net *, struct afs_addr_cursor *, 1043 struct key *, const uuid_t *); 1044 extern int afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, struct key *); 1045 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_net *, struct afs_addr_cursor *, 1046 struct key *, const uuid_t *); 1047 1048 /* 1049 * volume.c 1050 */ 1051 static inline struct afs_volume *__afs_get_volume(struct afs_volume *volume) 1052 { 1053 if (volume) 1054 atomic_inc(&volume->usage); 1055 return volume; 1056 } 1057 1058 extern struct afs_volume *afs_create_volume(struct afs_mount_params *); 1059 extern void afs_activate_volume(struct afs_volume *); 1060 extern void afs_deactivate_volume(struct afs_volume *); 1061 extern void afs_put_volume(struct afs_cell *, struct afs_volume *); 1062 extern int afs_check_volume_status(struct afs_volume *, struct key *); 1063 1064 /* 1065 * write.c 1066 */ 1067 extern int afs_set_page_dirty(struct page *); 1068 extern int afs_write_begin(struct file *file, struct address_space *mapping, 1069 loff_t pos, unsigned len, unsigned flags, 1070 struct page **pagep, void **fsdata); 1071 extern int afs_write_end(struct file *file, struct address_space *mapping, 1072 loff_t pos, unsigned len, unsigned copied, 1073 struct page *page, void *fsdata); 1074 extern int afs_writepage(struct page *, struct writeback_control *); 1075 extern int afs_writepages(struct address_space *, struct writeback_control *); 1076 extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); 1077 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); 1078 extern int afs_fsync(struct file *, loff_t, loff_t, int); 1079 extern int afs_page_mkwrite(struct vm_fault *); 1080 extern void afs_prune_wb_keys(struct afs_vnode *); 1081 extern int afs_launder_page(struct page *); 1082 1083 /* 1084 * xattr.c 1085 */ 1086 extern const struct xattr_handler *afs_xattr_handlers[]; 1087 extern ssize_t afs_listxattr(struct dentry *, char *, size_t); 1088 1089 1090 /* 1091 * Miscellaneous inline functions. 1092 */ 1093 static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 1094 { 1095 return container_of(inode, struct afs_vnode, vfs_inode); 1096 } 1097 1098 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 1099 { 1100 return &vnode->vfs_inode; 1101 } 1102 1103 static inline void afs_vnode_commit_status(struct afs_fs_cursor *fc, 1104 struct afs_vnode *vnode, 1105 unsigned int cb_break) 1106 { 1107 if (fc->ac.error == 0) 1108 afs_cache_permit(vnode, fc->key, cb_break); 1109 } 1110 1111 static inline void afs_check_for_remote_deletion(struct afs_fs_cursor *fc, 1112 struct afs_vnode *vnode) 1113 { 1114 if (fc->ac.error == -ENOENT) { 1115 set_bit(AFS_VNODE_DELETED, &vnode->flags); 1116 afs_break_callback(vnode); 1117 } 1118 } 1119 1120 1121 /*****************************************************************************/ 1122 /* 1123 * debug tracing 1124 */ 1125 extern unsigned afs_debug; 1126 1127 #define dbgprintk(FMT,...) \ 1128 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1129 1130 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1131 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1132 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1133 1134 1135 #if defined(__KDEBUG) 1136 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1137 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1138 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1139 1140 #elif defined(CONFIG_AFS_DEBUG) 1141 #define AFS_DEBUG_KENTER 0x01 1142 #define AFS_DEBUG_KLEAVE 0x02 1143 #define AFS_DEBUG_KDEBUG 0x04 1144 1145 #define _enter(FMT,...) \ 1146 do { \ 1147 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 1148 kenter(FMT,##__VA_ARGS__); \ 1149 } while (0) 1150 1151 #define _leave(FMT,...) \ 1152 do { \ 1153 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 1154 kleave(FMT,##__VA_ARGS__); \ 1155 } while (0) 1156 1157 #define _debug(FMT,...) \ 1158 do { \ 1159 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 1160 kdebug(FMT,##__VA_ARGS__); \ 1161 } while (0) 1162 1163 #else 1164 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1165 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1166 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1167 #endif 1168 1169 /* 1170 * debug assertion checking 1171 */ 1172 #if 1 // defined(__KDEBUGALL) 1173 1174 #define ASSERT(X) \ 1175 do { \ 1176 if (unlikely(!(X))) { \ 1177 printk(KERN_ERR "\n"); \ 1178 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1179 BUG(); \ 1180 } \ 1181 } while(0) 1182 1183 #define ASSERTCMP(X, OP, Y) \ 1184 do { \ 1185 if (unlikely(!((X) OP (Y)))) { \ 1186 printk(KERN_ERR "\n"); \ 1187 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1188 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1189 (unsigned long)(X), (unsigned long)(Y)); \ 1190 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1191 (unsigned long)(X), (unsigned long)(Y)); \ 1192 BUG(); \ 1193 } \ 1194 } while(0) 1195 1196 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1197 do { \ 1198 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 1199 printk(KERN_ERR "\n"); \ 1200 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1201 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 1202 (unsigned long)(L), (unsigned long)(N), \ 1203 (unsigned long)(H)); \ 1204 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 1205 (unsigned long)(L), (unsigned long)(N), \ 1206 (unsigned long)(H)); \ 1207 BUG(); \ 1208 } \ 1209 } while(0) 1210 1211 #define ASSERTIF(C, X) \ 1212 do { \ 1213 if (unlikely((C) && !(X))) { \ 1214 printk(KERN_ERR "\n"); \ 1215 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1216 BUG(); \ 1217 } \ 1218 } while(0) 1219 1220 #define ASSERTIFCMP(C, X, OP, Y) \ 1221 do { \ 1222 if (unlikely((C) && !((X) OP (Y)))) { \ 1223 printk(KERN_ERR "\n"); \ 1224 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1225 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1226 (unsigned long)(X), (unsigned long)(Y)); \ 1227 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1228 (unsigned long)(X), (unsigned long)(Y)); \ 1229 BUG(); \ 1230 } \ 1231 } while(0) 1232 1233 #else 1234 1235 #define ASSERT(X) \ 1236 do { \ 1237 } while(0) 1238 1239 #define ASSERTCMP(X, OP, Y) \ 1240 do { \ 1241 } while(0) 1242 1243 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1244 do { \ 1245 } while(0) 1246 1247 #define ASSERTIF(C, X) \ 1248 do { \ 1249 } while(0) 1250 1251 #define ASSERTIFCMP(C, X, OP, Y) \ 1252 do { \ 1253 } while(0) 1254 1255 #endif /* __KDEBUGALL */ 1256