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 <linux/mm_types.h> 25 #include <net/net_namespace.h> 26 #include <net/netns/generic.h> 27 #include <net/sock.h> 28 #include <net/af_rxrpc.h> 29 30 #include "afs.h" 31 #include "afs_vl.h" 32 33 #define AFS_CELL_MAX_ADDRS 15 34 35 struct pagevec; 36 struct afs_call; 37 38 struct afs_mount_params { 39 bool rwpath; /* T if the parent should be considered R/W */ 40 bool force; /* T to force cell type */ 41 bool autocell; /* T if set auto mount operation */ 42 bool dyn_root; /* T if dynamic root */ 43 afs_voltype_t type; /* type of volume requested */ 44 int volnamesz; /* size of volume name */ 45 const char *volname; /* name of volume to mount */ 46 struct net *net_ns; /* Network namespace in effect */ 47 struct afs_net *net; /* the AFS net namespace stuff */ 48 struct afs_cell *cell; /* cell in which to find volume */ 49 struct afs_volume *volume; /* volume record */ 50 struct key *key; /* key to use for secure mounting */ 51 }; 52 53 struct afs_iget_data { 54 struct afs_fid fid; 55 struct afs_volume *volume; /* volume on which resides */ 56 }; 57 58 enum afs_call_state { 59 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ 60 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ 61 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ 62 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ 63 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ 64 AFS_CALL_SV_REPLYING, /* Server: Replying */ 65 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ 66 AFS_CALL_COMPLETE, /* Completed or failed */ 67 }; 68 69 /* 70 * List of server addresses. 71 */ 72 struct afs_addr_list { 73 struct rcu_head rcu; /* Must be first */ 74 refcount_t usage; 75 u32 version; /* Version */ 76 unsigned char max_addrs; 77 unsigned char nr_addrs; 78 unsigned char index; /* Address currently in use */ 79 unsigned char nr_ipv4; /* Number of IPv4 addresses */ 80 unsigned long probed; /* Mask of servers that have been probed */ 81 unsigned long yfs; /* Mask of servers that are YFS */ 82 struct sockaddr_rxrpc addrs[]; 83 #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8)) 84 }; 85 86 /* 87 * a record of an in-progress RxRPC call 88 */ 89 struct afs_call { 90 const struct afs_call_type *type; /* type of call */ 91 wait_queue_head_t waitq; /* processes awaiting completion */ 92 struct work_struct async_work; /* async I/O processor */ 93 struct work_struct work; /* actual work processor */ 94 struct rxrpc_call *rxcall; /* RxRPC call handle */ 95 struct key *key; /* security for this call */ 96 struct afs_net *net; /* The network namespace */ 97 struct afs_server *cm_server; /* Server affected by incoming CM call */ 98 struct afs_cb_interest *cbi; /* Callback interest for server used */ 99 void *request; /* request data (first part) */ 100 struct address_space *mapping; /* Pages being written from */ 101 void *buffer; /* reply receive buffer */ 102 void *reply[4]; /* Where to put the reply */ 103 pgoff_t first; /* first page in mapping to deal with */ 104 pgoff_t last; /* last page in mapping to deal with */ 105 size_t offset; /* offset into received data store */ 106 atomic_t usage; 107 enum afs_call_state state; 108 spinlock_t state_lock; 109 int error; /* error code */ 110 u32 abort_code; /* Remote abort ID or 0 */ 111 unsigned request_size; /* size of request data */ 112 unsigned reply_max; /* maximum size of reply */ 113 unsigned first_offset; /* offset into mapping[first] */ 114 unsigned int cb_break; /* cb_break + cb_s_break before the call */ 115 union { 116 unsigned last_to; /* amount of mapping[last] */ 117 unsigned count2; /* count used in unmarshalling */ 118 }; 119 unsigned char unmarshall; /* unmarshalling phase */ 120 bool incoming; /* T if incoming call */ 121 bool send_pages; /* T if data from mapping should be sent */ 122 bool need_attention; /* T if RxRPC poked us */ 123 bool async; /* T if asynchronous */ 124 bool ret_reply0; /* T if should return reply[0] on success */ 125 bool upgrade; /* T to request service upgrade */ 126 u16 service_id; /* Actual service ID (after upgrade) */ 127 unsigned int debug_id; /* Trace ID */ 128 u32 operation_ID; /* operation ID for an incoming call */ 129 u32 count; /* count for use in unmarshalling */ 130 __be32 tmp; /* place to extract temporary data */ 131 afs_dataversion_t expected_version; /* Updated version expected from store */ 132 afs_dataversion_t expected_version_2; /* 2nd updated version expected from store */ 133 }; 134 135 struct afs_call_type { 136 const char *name; 137 unsigned int op; /* Really enum afs_fs_operation */ 138 139 /* deliver request or reply data to an call 140 * - returning an error will cause the call to be aborted 141 */ 142 int (*deliver)(struct afs_call *call); 143 144 /* clean up a call */ 145 void (*destructor)(struct afs_call *call); 146 147 /* Work function */ 148 void (*work)(struct work_struct *work); 149 }; 150 151 /* 152 * Key available for writeback on a file. 153 */ 154 struct afs_wb_key { 155 refcount_t usage; 156 struct key *key; 157 struct list_head vnode_link; /* Link in vnode->wb_keys */ 158 }; 159 160 /* 161 * AFS open file information record. Pointed to by file->private_data. 162 */ 163 struct afs_file { 164 struct key *key; /* The key this file was opened with */ 165 struct afs_wb_key *wb; /* Writeback key record for this file */ 166 }; 167 168 static inline struct key *afs_file_key(struct file *file) 169 { 170 struct afs_file *af = file->private_data; 171 172 return af->key; 173 } 174 175 /* 176 * Record of an outstanding read operation on a vnode. 177 */ 178 struct afs_read { 179 loff_t pos; /* Where to start reading */ 180 loff_t len; /* How much we're asking for */ 181 loff_t actual_len; /* How much we're actually getting */ 182 loff_t remain; /* Amount remaining */ 183 loff_t file_size; /* File size returned by server */ 184 afs_dataversion_t data_version; /* Version number returned by server */ 185 refcount_t usage; 186 unsigned int index; /* Which page we're reading into */ 187 unsigned int nr_pages; 188 void (*page_done)(struct afs_call *, struct afs_read *); 189 struct page **pages; 190 struct page *array[]; 191 }; 192 193 /* 194 * AFS superblock private data 195 * - there's one superblock per volume 196 */ 197 struct afs_super_info { 198 struct net *net_ns; /* Network namespace */ 199 struct afs_cell *cell; /* The cell in which the volume resides */ 200 struct afs_volume *volume; /* volume record */ 201 bool dyn_root; /* True if dynamic root */ 202 }; 203 204 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) 205 { 206 return sb->s_fs_info; 207 } 208 209 extern struct file_system_type afs_fs_type; 210 211 /* 212 * Set of substitutes for @sys. 213 */ 214 struct afs_sysnames { 215 #define AFS_NR_SYSNAME 16 216 char *subs[AFS_NR_SYSNAME]; 217 refcount_t usage; 218 unsigned short nr; 219 char blank[1]; 220 }; 221 222 /* 223 * AFS network namespace record. 224 */ 225 struct afs_net { 226 struct net *net; /* Backpointer to the owning net namespace */ 227 struct afs_uuid uuid; 228 bool live; /* F if this namespace is being removed */ 229 230 /* AF_RXRPC I/O stuff */ 231 struct socket *socket; 232 struct afs_call *spare_incoming_call; 233 struct work_struct charge_preallocation_work; 234 struct mutex socket_mutex; 235 atomic_t nr_outstanding_calls; 236 atomic_t nr_superblocks; 237 238 /* Cell database */ 239 struct rb_root cells; 240 struct afs_cell __rcu *ws_cell; 241 struct work_struct cells_manager; 242 struct timer_list cells_timer; 243 atomic_t cells_outstanding; 244 seqlock_t cells_lock; 245 246 struct mutex proc_cells_lock; 247 struct hlist_head proc_cells; 248 249 /* Known servers. Theoretically each fileserver can only be in one 250 * cell, but in practice, people create aliases and subsets and there's 251 * no easy way to distinguish them. 252 */ 253 seqlock_t fs_lock; /* For fs_servers */ 254 struct rb_root fs_servers; /* afs_server (by server UUID or address) */ 255 struct list_head fs_updates; /* afs_server (by update_at) */ 256 struct hlist_head fs_proc; /* procfs servers list */ 257 258 struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ 259 struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */ 260 seqlock_t fs_addr_lock; /* For fs_addresses[46] */ 261 262 struct work_struct fs_manager; 263 struct timer_list fs_timer; 264 atomic_t servers_outstanding; 265 266 /* File locking renewal management */ 267 struct mutex lock_manager_mutex; 268 269 /* Misc */ 270 struct super_block *dynroot_sb; /* Dynamic root mount superblock */ 271 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ 272 struct afs_sysnames *sysnames; 273 rwlock_t sysnames_lock; 274 275 /* Statistics counters */ 276 atomic_t n_lookup; /* Number of lookups done */ 277 atomic_t n_reval; /* Number of dentries needing revalidation */ 278 atomic_t n_inval; /* Number of invalidations by the server */ 279 atomic_t n_relpg; /* Number of invalidations by releasepage */ 280 atomic_t n_read_dir; /* Number of directory pages read */ 281 atomic_t n_dir_cr; /* Number of directory entry creation edits */ 282 atomic_t n_dir_rm; /* Number of directory entry removal edits */ 283 atomic_t n_stores; /* Number of store ops */ 284 atomic_long_t n_store_bytes; /* Number of bytes stored */ 285 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ 286 atomic_t n_fetches; /* Number of data fetch ops */ 287 }; 288 289 extern const char afs_init_sysname[]; 290 291 enum afs_cell_state { 292 AFS_CELL_UNSET, 293 AFS_CELL_ACTIVATING, 294 AFS_CELL_ACTIVE, 295 AFS_CELL_DEACTIVATING, 296 AFS_CELL_INACTIVE, 297 AFS_CELL_FAILED, 298 }; 299 300 /* 301 * AFS cell record. 302 * 303 * This is a tricky concept to get right as it is possible to create aliases 304 * simply by pointing AFSDB/SRV records for two names at the same set of VL 305 * servers; it is also possible to do things like setting up two sets of VL 306 * servers, one of which provides a superset of the volumes provided by the 307 * other (for internal/external division, for example). 308 * 309 * Cells only exist in the sense that (a) a cell's name maps to a set of VL 310 * servers and (b) a cell's name is used by the client to select the key to use 311 * for authentication and encryption. The cell name is not typically used in 312 * the protocol. 313 * 314 * There is no easy way to determine if two cells are aliases or one is a 315 * subset of another. 316 */ 317 struct afs_cell { 318 union { 319 struct rcu_head rcu; 320 struct rb_node net_node; /* Node in net->cells */ 321 }; 322 struct afs_net *net; 323 struct key *anonymous_key; /* anonymous user key for this cell */ 324 struct work_struct manager; /* Manager for init/deinit/dns */ 325 struct hlist_node proc_link; /* /proc cell list link */ 326 #ifdef CONFIG_AFS_FSCACHE 327 struct fscache_cookie *cache; /* caching cookie */ 328 #endif 329 time64_t dns_expiry; /* Time AFSDB/SRV record expires */ 330 time64_t last_inactive; /* Time of last drop of usage count */ 331 atomic_t usage; 332 unsigned long flags; 333 #define AFS_CELL_FL_NOT_READY 0 /* The cell record is not ready for use */ 334 #define AFS_CELL_FL_NO_GC 1 /* The cell was added manually, don't auto-gc */ 335 #define AFS_CELL_FL_NOT_FOUND 2 /* Permanent DNS error */ 336 #define AFS_CELL_FL_DNS_FAIL 3 /* Failed to access DNS */ 337 #define AFS_CELL_FL_NO_LOOKUP_YET 4 /* Not completed first DNS lookup yet */ 338 enum afs_cell_state state; 339 short error; 340 341 /* Active fileserver interaction state. */ 342 struct list_head proc_volumes; /* procfs volume list */ 343 rwlock_t proc_lock; 344 345 /* VL server list. */ 346 rwlock_t vl_addrs_lock; /* Lock on vl_addrs */ 347 struct afs_addr_list __rcu *vl_addrs; /* List of VL servers */ 348 u8 name_len; /* Length of name */ 349 char name[64 + 1]; /* Cell name, case-flattened and NUL-padded */ 350 }; 351 352 /* 353 * Cached VLDB entry. 354 * 355 * This is pointed to by cell->vldb_entries, indexed by name. 356 */ 357 struct afs_vldb_entry { 358 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ 359 360 unsigned long flags; 361 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ 362 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ 363 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ 364 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ 365 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ 366 367 uuid_t fs_server[AFS_NMAXNSERVERS]; 368 u8 fs_mask[AFS_NMAXNSERVERS]; 369 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 370 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 371 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 372 short error; 373 u8 nr_servers; /* Number of server records */ 374 u8 name_len; 375 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 376 }; 377 378 /* 379 * Record of fileserver with which we're actively communicating. 380 */ 381 struct afs_server { 382 struct rcu_head rcu; 383 union { 384 uuid_t uuid; /* Server ID */ 385 struct afs_uuid _uuid; 386 }; 387 388 struct afs_addr_list __rcu *addresses; 389 struct rb_node uuid_rb; /* Link in net->servers */ 390 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ 391 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ 392 struct hlist_node proc_link; /* Link in net->fs_proc */ 393 struct afs_server *gc_next; /* Next server in manager's list */ 394 time64_t put_time; /* Time at which last put */ 395 time64_t update_at; /* Time at which to next update the record */ 396 unsigned long flags; 397 #define AFS_SERVER_FL_NEW 0 /* New server, don't inc cb_s_break */ 398 #define AFS_SERVER_FL_NOT_READY 1 /* The record is not ready for use */ 399 #define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */ 400 #define AFS_SERVER_FL_VL_FAIL 3 /* Failed to access VL server */ 401 #define AFS_SERVER_FL_UPDATING 4 402 #define AFS_SERVER_FL_PROBED 5 /* The fileserver has been probed */ 403 #define AFS_SERVER_FL_PROBING 6 /* Fileserver is being probed */ 404 #define AFS_SERVER_FL_NO_IBULK 7 /* Fileserver doesn't support FS.InlineBulkStatus */ 405 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ 406 atomic_t usage; 407 u32 addr_version; /* Address list version */ 408 409 /* file service access */ 410 rwlock_t fs_lock; /* access lock */ 411 412 /* callback promise management */ 413 struct hlist_head cb_volumes; /* List of volume interests on this server */ 414 unsigned cb_s_break; /* Break-everything counter. */ 415 rwlock_t cb_break_lock; /* Volume finding lock */ 416 }; 417 418 /* 419 * Volume collation in the server's callback interest list. 420 */ 421 struct afs_vol_interest { 422 struct hlist_node srv_link; /* Link in server->cb_volumes */ 423 struct hlist_head cb_interests; /* List of callback interests on the server */ 424 afs_volid_t vid; /* Volume ID to match */ 425 unsigned int usage; 426 }; 427 428 /* 429 * Interest by a superblock on a server. 430 */ 431 struct afs_cb_interest { 432 struct hlist_node cb_vlink; /* Link in vol_interest->cb_interests */ 433 struct afs_vol_interest *vol_interest; 434 struct afs_server *server; /* Server on which this interest resides */ 435 struct super_block *sb; /* Superblock on which inodes reside */ 436 afs_volid_t vid; /* Volume ID to match */ 437 refcount_t usage; 438 }; 439 440 /* 441 * Replaceable server list. 442 */ 443 struct afs_server_entry { 444 struct afs_server *server; 445 struct afs_cb_interest *cb_interest; 446 }; 447 448 struct afs_server_list { 449 refcount_t usage; 450 unsigned short nr_servers; 451 unsigned short index; /* Server currently in use */ 452 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ 453 unsigned int seq; /* Set to ->servers_seq when installed */ 454 rwlock_t lock; 455 struct afs_server_entry servers[]; 456 }; 457 458 /* 459 * Live AFS volume management. 460 */ 461 struct afs_volume { 462 afs_volid_t vid; /* volume ID */ 463 atomic_t usage; 464 time64_t update_at; /* Time at which to next update */ 465 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 466 struct list_head proc_link; /* Link in cell->vl_proc */ 467 unsigned long flags; 468 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ 469 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ 470 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ 471 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ 472 #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ 473 #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ 474 #ifdef CONFIG_AFS_FSCACHE 475 struct fscache_cookie *cache; /* caching cookie */ 476 #endif 477 struct afs_server_list *servers; /* List of servers on which volume resides */ 478 rwlock_t servers_lock; /* Lock for ->servers */ 479 unsigned int servers_seq; /* Incremented each time ->servers changes */ 480 481 unsigned cb_v_break; /* Break-everything counter. */ 482 rwlock_t cb_break_lock; 483 484 afs_voltype_t type; /* type of volume */ 485 short error; 486 char type_force; /* force volume type (suppress R/O -> R/W) */ 487 u8 name_len; 488 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 489 }; 490 491 enum afs_lock_state { 492 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ 493 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ 494 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ 495 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ 496 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ 497 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ 498 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ 499 }; 500 501 /* 502 * AFS inode private data. 503 * 504 * Note that afs_alloc_inode() *must* reset anything that could incorrectly 505 * leak from one inode to another. 506 */ 507 struct afs_vnode { 508 struct inode vfs_inode; /* the VFS's inode record */ 509 510 struct afs_volume *volume; /* volume on which vnode resides */ 511 struct afs_fid fid; /* the file identifier for this inode */ 512 struct afs_file_status status; /* AFS status info for this file */ 513 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ 514 #ifdef CONFIG_AFS_FSCACHE 515 struct fscache_cookie *cache; /* caching cookie */ 516 #endif 517 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ 518 struct mutex io_lock; /* Lock for serialising I/O on this mutex */ 519 struct rw_semaphore validate_lock; /* lock for validating this vnode */ 520 spinlock_t wb_lock; /* lock for wb_keys */ 521 spinlock_t lock; /* waitqueue/flags lock */ 522 unsigned long flags; 523 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ 524 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 525 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ 526 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 527 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 528 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 529 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ 530 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ 531 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ 532 533 struct list_head wb_keys; /* List of keys available for writeback */ 534 struct list_head pending_locks; /* locks waiting to be granted */ 535 struct list_head granted_locks; /* locks granted on this file */ 536 struct delayed_work lock_work; /* work to be done in locking */ 537 struct key *lock_key; /* Key to be used in lock ops */ 538 enum afs_lock_state lock_state : 8; 539 afs_lock_type_t lock_type : 8; 540 541 /* outstanding callback notification on this file */ 542 struct afs_cb_interest *cb_interest; /* Server on which this resides */ 543 unsigned int cb_s_break; /* Mass break counter on ->server */ 544 unsigned int cb_v_break; /* Mass break counter on ->volume */ 545 unsigned int cb_break; /* Break counter on vnode */ 546 seqlock_t cb_lock; /* Lock for ->cb_interest, ->status, ->cb_*break */ 547 548 time64_t cb_expires_at; /* time at which callback expires */ 549 unsigned cb_version; /* callback version */ 550 afs_callback_type_t cb_type; /* type of callback */ 551 }; 552 553 /* 554 * cached security record for one user's attempt to access a vnode 555 */ 556 struct afs_permit { 557 struct key *key; /* RxRPC ticket holding a security context */ 558 afs_access_t access; /* CallerAccess value for this key */ 559 }; 560 561 /* 562 * Immutable cache of CallerAccess records from attempts to access vnodes. 563 * These may be shared between multiple vnodes. 564 */ 565 struct afs_permits { 566 struct rcu_head rcu; 567 struct hlist_node hash_node; /* Link in hash */ 568 unsigned long h; /* Hash value for this permit list */ 569 refcount_t usage; 570 unsigned short nr_permits; /* Number of records */ 571 bool invalidated; /* Invalidated due to key change */ 572 struct afs_permit permits[]; /* List of permits sorted by key pointer */ 573 }; 574 575 /* 576 * record of one of a system's set of network interfaces 577 */ 578 struct afs_interface { 579 struct in_addr address; /* IPv4 address bound to interface */ 580 struct in_addr netmask; /* netmask applied to address */ 581 unsigned mtu; /* MTU of interface */ 582 }; 583 584 /* 585 * Cursor for iterating over a server's address list. 586 */ 587 struct afs_addr_cursor { 588 struct afs_addr_list *alist; /* Current address list (pins ref) */ 589 struct sockaddr_rxrpc *addr; 590 u32 abort_code; 591 unsigned short start; /* Starting point in alist->addrs[] */ 592 unsigned short index; /* Wrapping offset from start to current addr */ 593 short error; 594 bool begun; /* T if we've begun iteration */ 595 bool responded; /* T if the current address responded */ 596 }; 597 598 /* 599 * Cursor for iterating over a set of fileservers. 600 */ 601 struct afs_fs_cursor { 602 struct afs_addr_cursor ac; 603 struct afs_vnode *vnode; 604 struct afs_server_list *server_list; /* Current server list (pins ref) */ 605 struct afs_cb_interest *cbi; /* Server on which this resides (pins ref) */ 606 struct key *key; /* Key for the server */ 607 unsigned int cb_break; /* cb_break + cb_s_break before the call */ 608 unsigned int cb_break_2; /* cb_break + cb_s_break (2nd vnode) */ 609 unsigned char start; /* Initial index in server list */ 610 unsigned char index; /* Number of servers tried beyond start */ 611 unsigned short flags; 612 #define AFS_FS_CURSOR_STOP 0x0001 /* Set to cease iteration */ 613 #define AFS_FS_CURSOR_VBUSY 0x0002 /* Set if seen VBUSY */ 614 #define AFS_FS_CURSOR_VMOVED 0x0004 /* Set if seen VMOVED */ 615 #define AFS_FS_CURSOR_VNOVOL 0x0008 /* Set if seen VNOVOL */ 616 #define AFS_FS_CURSOR_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ 617 #define AFS_FS_CURSOR_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ 618 }; 619 620 /* 621 * Cache auxiliary data. 622 */ 623 struct afs_vnode_cache_aux { 624 u64 data_version; 625 } __packed; 626 627 #include <trace/events/afs.h> 628 629 /*****************************************************************************/ 630 /* 631 * addr_list.c 632 */ 633 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) 634 { 635 if (alist) 636 refcount_inc(&alist->usage); 637 return alist; 638 } 639 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, 640 unsigned short, 641 unsigned short); 642 extern void afs_put_addrlist(struct afs_addr_list *); 643 extern struct afs_addr_list *afs_parse_text_addrs(const char *, size_t, char, 644 unsigned short, unsigned short); 645 extern struct afs_addr_list *afs_dns_query(struct afs_cell *, time64_t *); 646 extern bool afs_iterate_addresses(struct afs_addr_cursor *); 647 extern int afs_end_cursor(struct afs_addr_cursor *); 648 extern int afs_set_vl_cursor(struct afs_addr_cursor *, struct afs_cell *); 649 650 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); 651 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); 652 653 /* 654 * cache.c 655 */ 656 #ifdef CONFIG_AFS_FSCACHE 657 extern struct fscache_netfs afs_cache_netfs; 658 extern struct fscache_cookie_def afs_cell_cache_index_def; 659 extern struct fscache_cookie_def afs_volume_cache_index_def; 660 extern struct fscache_cookie_def afs_vnode_cache_index_def; 661 #else 662 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) 663 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) 664 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) 665 #endif 666 667 /* 668 * callback.c 669 */ 670 extern void afs_init_callback_state(struct afs_server *); 671 extern void afs_break_callback(struct afs_vnode *); 672 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break*); 673 674 extern int afs_register_server_cb_interest(struct afs_vnode *, 675 struct afs_server_list *, unsigned int); 676 extern void afs_put_cb_interest(struct afs_net *, struct afs_cb_interest *); 677 extern void afs_clear_callback_interests(struct afs_net *, struct afs_server_list *); 678 679 static inline struct afs_cb_interest *afs_get_cb_interest(struct afs_cb_interest *cbi) 680 { 681 if (cbi) 682 refcount_inc(&cbi->usage); 683 return cbi; 684 } 685 686 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) 687 { 688 return vnode->cb_break + vnode->cb_s_break + vnode->cb_v_break; 689 } 690 691 static inline unsigned int afs_cb_break_sum(struct afs_vnode *vnode, 692 struct afs_cb_interest *cbi) 693 { 694 return vnode->cb_break + cbi->server->cb_s_break + vnode->volume->cb_v_break; 695 } 696 697 /* 698 * cell.c 699 */ 700 extern int afs_cell_init(struct afs_net *, const char *); 701 extern struct afs_cell *afs_lookup_cell_rcu(struct afs_net *, const char *, unsigned); 702 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, 703 const char *, bool); 704 extern struct afs_cell *afs_get_cell(struct afs_cell *); 705 extern void afs_put_cell(struct afs_net *, struct afs_cell *); 706 extern void afs_manage_cells(struct work_struct *); 707 extern void afs_cells_timer(struct timer_list *); 708 extern void __net_exit afs_cell_purge(struct afs_net *); 709 710 /* 711 * cmservice.c 712 */ 713 extern bool afs_cm_incoming_call(struct afs_call *); 714 715 /* 716 * dir.c 717 */ 718 extern const struct file_operations afs_dir_file_operations; 719 extern const struct inode_operations afs_dir_inode_operations; 720 extern const struct address_space_operations afs_dir_aops; 721 extern const struct dentry_operations afs_fs_dentry_operations; 722 723 extern void afs_d_release(struct dentry *); 724 725 /* 726 * dir_edit.c 727 */ 728 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, 729 enum afs_edit_dir_reason); 730 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); 731 732 /* 733 * dynroot.c 734 */ 735 extern const struct file_operations afs_dynroot_file_operations; 736 extern const struct inode_operations afs_dynroot_inode_operations; 737 extern const struct dentry_operations afs_dynroot_dentry_operations; 738 739 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); 740 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); 741 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); 742 extern int afs_dynroot_populate(struct super_block *); 743 extern void afs_dynroot_depopulate(struct super_block *); 744 745 /* 746 * file.c 747 */ 748 extern const struct address_space_operations afs_fs_aops; 749 extern const struct inode_operations afs_file_inode_operations; 750 extern const struct file_operations afs_file_operations; 751 752 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); 753 extern void afs_put_wb_key(struct afs_wb_key *); 754 extern int afs_open(struct inode *, struct file *); 755 extern int afs_release(struct inode *, struct file *); 756 extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *); 757 extern int afs_page_filler(void *, struct page *); 758 extern void afs_put_read(struct afs_read *); 759 760 /* 761 * flock.c 762 */ 763 extern struct workqueue_struct *afs_lock_manager; 764 765 extern void afs_lock_work(struct work_struct *); 766 extern void afs_lock_may_be_available(struct afs_vnode *); 767 extern int afs_lock(struct file *, int, struct file_lock *); 768 extern int afs_flock(struct file *, int, struct file_lock *); 769 770 /* 771 * fsclient.c 772 */ 773 #define AFS_VNODE_NOT_YET_SET 0x01 774 #define AFS_VNODE_META_CHANGED 0x02 775 #define AFS_VNODE_DATA_CHANGED 0x04 776 extern void afs_update_inode_from_status(struct afs_vnode *, struct afs_file_status *, 777 const afs_dataversion_t *, u8); 778 779 extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *, bool); 780 extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *); 781 extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *); 782 extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t, u64, 783 struct afs_fid *, struct afs_file_status *, struct afs_callback *); 784 extern int afs_fs_remove(struct afs_fs_cursor *, const char *, bool, u64); 785 extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64); 786 extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, u64, 787 struct afs_fid *, struct afs_file_status *); 788 extern int afs_fs_rename(struct afs_fs_cursor *, const char *, 789 struct afs_vnode *, const char *, u64, u64); 790 extern int afs_fs_store_data(struct afs_fs_cursor *, struct address_space *, 791 pgoff_t, pgoff_t, unsigned, unsigned); 792 extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *); 793 extern int afs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *); 794 extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t); 795 extern int afs_fs_extend_lock(struct afs_fs_cursor *); 796 extern int afs_fs_release_lock(struct afs_fs_cursor *); 797 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, 798 struct afs_addr_cursor *, struct key *); 799 extern int afs_fs_get_capabilities(struct afs_net *, struct afs_server *, 800 struct afs_addr_cursor *, struct key *); 801 extern int afs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *, 802 struct afs_fid *, struct afs_file_status *, 803 struct afs_callback *, unsigned int, 804 struct afs_volsync *); 805 extern int afs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *, 806 struct afs_fid *, struct afs_file_status *, 807 struct afs_callback *, struct afs_volsync *); 808 809 /* 810 * inode.c 811 */ 812 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool); 813 extern int afs_iget5_test(struct inode *, void *); 814 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); 815 extern struct inode *afs_iget(struct super_block *, struct key *, 816 struct afs_fid *, struct afs_file_status *, 817 struct afs_callback *, 818 struct afs_cb_interest *); 819 extern void afs_zap_data(struct afs_vnode *); 820 extern int afs_validate(struct afs_vnode *, struct key *); 821 extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); 822 extern int afs_setattr(struct dentry *, struct iattr *); 823 extern void afs_evict_inode(struct inode *); 824 extern int afs_drop_inode(struct inode *); 825 826 /* 827 * main.c 828 */ 829 extern struct workqueue_struct *afs_wq; 830 extern int afs_net_id; 831 832 static inline struct afs_net *afs_net(struct net *net) 833 { 834 return net_generic(net, afs_net_id); 835 } 836 837 static inline struct afs_net *afs_sb2net(struct super_block *sb) 838 { 839 return afs_net(AFS_FS_S(sb)->net_ns); 840 } 841 842 static inline struct afs_net *afs_d2net(struct dentry *dentry) 843 { 844 return afs_sb2net(dentry->d_sb); 845 } 846 847 static inline struct afs_net *afs_i2net(struct inode *inode) 848 { 849 return afs_sb2net(inode->i_sb); 850 } 851 852 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 853 { 854 return afs_i2net(&vnode->vfs_inode); 855 } 856 857 static inline struct afs_net *afs_sock2net(struct sock *sk) 858 { 859 return net_generic(sock_net(sk), afs_net_id); 860 } 861 862 static inline void __afs_stat(atomic_t *s) 863 { 864 atomic_inc(s); 865 } 866 867 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) 868 869 /* 870 * misc.c 871 */ 872 extern int afs_abort_to_error(u32); 873 874 /* 875 * mntpt.c 876 */ 877 extern const struct inode_operations afs_mntpt_inode_operations; 878 extern const struct inode_operations afs_autocell_inode_operations; 879 extern const struct file_operations afs_mntpt_file_operations; 880 881 extern struct vfsmount *afs_d_automount(struct path *); 882 extern void afs_mntpt_kill_timer(void); 883 884 /* 885 * netdevices.c 886 */ 887 extern int afs_get_ipv4_interfaces(struct afs_net *, struct afs_interface *, 888 size_t, bool); 889 890 /* 891 * proc.c 892 */ 893 #ifdef CONFIG_PROC_FS 894 extern int __net_init afs_proc_init(struct afs_net *); 895 extern void __net_exit afs_proc_cleanup(struct afs_net *); 896 extern int afs_proc_cell_setup(struct afs_cell *); 897 extern void afs_proc_cell_remove(struct afs_cell *); 898 extern void afs_put_sysnames(struct afs_sysnames *); 899 #else 900 static inline int afs_proc_init(struct afs_net *net) { return 0; } 901 static inline void afs_proc_cleanup(struct afs_net *net) {} 902 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } 903 static inline void afs_proc_cell_remove(struct afs_cell *cell) {} 904 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} 905 #endif 906 907 /* 908 * rotate.c 909 */ 910 extern bool afs_begin_vnode_operation(struct afs_fs_cursor *, struct afs_vnode *, 911 struct key *); 912 extern bool afs_select_fileserver(struct afs_fs_cursor *); 913 extern bool afs_select_current_fileserver(struct afs_fs_cursor *); 914 extern int afs_end_vnode_operation(struct afs_fs_cursor *); 915 916 /* 917 * rxrpc.c 918 */ 919 extern struct workqueue_struct *afs_async_calls; 920 921 extern int __net_init afs_open_socket(struct afs_net *); 922 extern void __net_exit afs_close_socket(struct afs_net *); 923 extern void afs_charge_preallocation(struct work_struct *); 924 extern void afs_put_call(struct afs_call *); 925 extern int afs_queue_call_work(struct afs_call *); 926 extern long afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t, bool); 927 extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 928 const struct afs_call_type *, 929 size_t, size_t); 930 extern void afs_flat_call_destructor(struct afs_call *); 931 extern void afs_send_empty_reply(struct afs_call *); 932 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 933 extern int afs_extract_data(struct afs_call *, void *, size_t, bool); 934 extern int afs_protocol_error(struct afs_call *, int); 935 936 static inline int afs_transfer_reply(struct afs_call *call) 937 { 938 return afs_extract_data(call, call->buffer, call->reply_max, false); 939 } 940 941 static inline bool afs_check_call_state(struct afs_call *call, 942 enum afs_call_state state) 943 { 944 return READ_ONCE(call->state) == state; 945 } 946 947 static inline bool afs_set_call_state(struct afs_call *call, 948 enum afs_call_state from, 949 enum afs_call_state to) 950 { 951 bool ok = false; 952 953 spin_lock_bh(&call->state_lock); 954 if (call->state == from) { 955 call->state = to; 956 trace_afs_call_state(call, from, to, 0, 0); 957 ok = true; 958 } 959 spin_unlock_bh(&call->state_lock); 960 return ok; 961 } 962 963 static inline void afs_set_call_complete(struct afs_call *call, 964 int error, u32 remote_abort) 965 { 966 enum afs_call_state state; 967 bool ok = false; 968 969 spin_lock_bh(&call->state_lock); 970 state = call->state; 971 if (state != AFS_CALL_COMPLETE) { 972 call->abort_code = remote_abort; 973 call->error = error; 974 call->state = AFS_CALL_COMPLETE; 975 trace_afs_call_state(call, state, AFS_CALL_COMPLETE, 976 error, remote_abort); 977 ok = true; 978 } 979 spin_unlock_bh(&call->state_lock); 980 if (ok) 981 trace_afs_call_done(call); 982 } 983 984 /* 985 * security.c 986 */ 987 extern void afs_put_permits(struct afs_permits *); 988 extern void afs_clear_permits(struct afs_vnode *); 989 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int); 990 extern void afs_zap_permits(struct rcu_head *); 991 extern struct key *afs_request_key(struct afs_cell *); 992 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); 993 extern int afs_permission(struct inode *, int); 994 extern void __exit afs_clean_up_permit_cache(void); 995 996 /* 997 * server.c 998 */ 999 extern spinlock_t afs_server_peer_lock; 1000 1001 static inline struct afs_server *afs_get_server(struct afs_server *server) 1002 { 1003 atomic_inc(&server->usage); 1004 return server; 1005 } 1006 1007 extern struct afs_server *afs_find_server(struct afs_net *, 1008 const struct sockaddr_rxrpc *); 1009 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); 1010 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *); 1011 extern void afs_put_server(struct afs_net *, struct afs_server *); 1012 extern void afs_manage_servers(struct work_struct *); 1013 extern void afs_servers_timer(struct timer_list *); 1014 extern void __net_exit afs_purge_servers(struct afs_net *); 1015 extern bool afs_probe_fileserver(struct afs_fs_cursor *); 1016 extern bool afs_check_server_record(struct afs_fs_cursor *, struct afs_server *); 1017 1018 /* 1019 * server_list.c 1020 */ 1021 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) 1022 { 1023 refcount_inc(&slist->usage); 1024 return slist; 1025 } 1026 1027 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); 1028 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, 1029 struct afs_vldb_entry *, 1030 u8); 1031 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); 1032 1033 /* 1034 * super.c 1035 */ 1036 extern int __init afs_fs_init(void); 1037 extern void afs_fs_exit(void); 1038 1039 /* 1040 * vlclient.c 1041 */ 1042 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_net *, 1043 struct afs_addr_cursor *, 1044 struct key *, const char *, int); 1045 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_net *, struct afs_addr_cursor *, 1046 struct key *, const uuid_t *); 1047 extern int afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, struct key *); 1048 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_net *, struct afs_addr_cursor *, 1049 struct key *, const uuid_t *); 1050 1051 /* 1052 * volume.c 1053 */ 1054 static inline struct afs_volume *__afs_get_volume(struct afs_volume *volume) 1055 { 1056 if (volume) 1057 atomic_inc(&volume->usage); 1058 return volume; 1059 } 1060 1061 extern struct afs_volume *afs_create_volume(struct afs_mount_params *); 1062 extern void afs_activate_volume(struct afs_volume *); 1063 extern void afs_deactivate_volume(struct afs_volume *); 1064 extern void afs_put_volume(struct afs_cell *, struct afs_volume *); 1065 extern int afs_check_volume_status(struct afs_volume *, struct key *); 1066 1067 /* 1068 * write.c 1069 */ 1070 extern int afs_set_page_dirty(struct page *); 1071 extern int afs_write_begin(struct file *file, struct address_space *mapping, 1072 loff_t pos, unsigned len, unsigned flags, 1073 struct page **pagep, void **fsdata); 1074 extern int afs_write_end(struct file *file, struct address_space *mapping, 1075 loff_t pos, unsigned len, unsigned copied, 1076 struct page *page, void *fsdata); 1077 extern int afs_writepage(struct page *, struct writeback_control *); 1078 extern int afs_writepages(struct address_space *, struct writeback_control *); 1079 extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); 1080 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); 1081 extern int afs_fsync(struct file *, loff_t, loff_t, int); 1082 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); 1083 extern void afs_prune_wb_keys(struct afs_vnode *); 1084 extern int afs_launder_page(struct page *); 1085 1086 /* 1087 * xattr.c 1088 */ 1089 extern const struct xattr_handler *afs_xattr_handlers[]; 1090 extern ssize_t afs_listxattr(struct dentry *, char *, size_t); 1091 1092 1093 /* 1094 * Miscellaneous inline functions. 1095 */ 1096 static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 1097 { 1098 return container_of(inode, struct afs_vnode, vfs_inode); 1099 } 1100 1101 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 1102 { 1103 return &vnode->vfs_inode; 1104 } 1105 1106 static inline void afs_vnode_commit_status(struct afs_fs_cursor *fc, 1107 struct afs_vnode *vnode, 1108 unsigned int cb_break) 1109 { 1110 if (fc->ac.error == 0) 1111 afs_cache_permit(vnode, fc->key, cb_break); 1112 } 1113 1114 static inline void afs_check_for_remote_deletion(struct afs_fs_cursor *fc, 1115 struct afs_vnode *vnode) 1116 { 1117 if (fc->ac.error == -ENOENT) { 1118 set_bit(AFS_VNODE_DELETED, &vnode->flags); 1119 afs_break_callback(vnode); 1120 } 1121 } 1122 1123 1124 /*****************************************************************************/ 1125 /* 1126 * debug tracing 1127 */ 1128 extern unsigned afs_debug; 1129 1130 #define dbgprintk(FMT,...) \ 1131 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1132 1133 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1134 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1135 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1136 1137 1138 #if defined(__KDEBUG) 1139 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1140 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1141 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1142 1143 #elif defined(CONFIG_AFS_DEBUG) 1144 #define AFS_DEBUG_KENTER 0x01 1145 #define AFS_DEBUG_KLEAVE 0x02 1146 #define AFS_DEBUG_KDEBUG 0x04 1147 1148 #define _enter(FMT,...) \ 1149 do { \ 1150 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 1151 kenter(FMT,##__VA_ARGS__); \ 1152 } while (0) 1153 1154 #define _leave(FMT,...) \ 1155 do { \ 1156 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 1157 kleave(FMT,##__VA_ARGS__); \ 1158 } while (0) 1159 1160 #define _debug(FMT,...) \ 1161 do { \ 1162 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 1163 kdebug(FMT,##__VA_ARGS__); \ 1164 } while (0) 1165 1166 #else 1167 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1168 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1169 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1170 #endif 1171 1172 /* 1173 * debug assertion checking 1174 */ 1175 #if 1 // defined(__KDEBUGALL) 1176 1177 #define ASSERT(X) \ 1178 do { \ 1179 if (unlikely(!(X))) { \ 1180 printk(KERN_ERR "\n"); \ 1181 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1182 BUG(); \ 1183 } \ 1184 } while(0) 1185 1186 #define ASSERTCMP(X, OP, Y) \ 1187 do { \ 1188 if (unlikely(!((X) OP (Y)))) { \ 1189 printk(KERN_ERR "\n"); \ 1190 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1191 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1192 (unsigned long)(X), (unsigned long)(Y)); \ 1193 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1194 (unsigned long)(X), (unsigned long)(Y)); \ 1195 BUG(); \ 1196 } \ 1197 } while(0) 1198 1199 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1200 do { \ 1201 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 1202 printk(KERN_ERR "\n"); \ 1203 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1204 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 1205 (unsigned long)(L), (unsigned long)(N), \ 1206 (unsigned long)(H)); \ 1207 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 1208 (unsigned long)(L), (unsigned long)(N), \ 1209 (unsigned long)(H)); \ 1210 BUG(); \ 1211 } \ 1212 } while(0) 1213 1214 #define ASSERTIF(C, X) \ 1215 do { \ 1216 if (unlikely((C) && !(X))) { \ 1217 printk(KERN_ERR "\n"); \ 1218 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1219 BUG(); \ 1220 } \ 1221 } while(0) 1222 1223 #define ASSERTIFCMP(C, X, OP, Y) \ 1224 do { \ 1225 if (unlikely((C) && !((X) OP (Y)))) { \ 1226 printk(KERN_ERR "\n"); \ 1227 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1228 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1229 (unsigned long)(X), (unsigned long)(Y)); \ 1230 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1231 (unsigned long)(X), (unsigned long)(Y)); \ 1232 BUG(); \ 1233 } \ 1234 } while(0) 1235 1236 #else 1237 1238 #define ASSERT(X) \ 1239 do { \ 1240 } while(0) 1241 1242 #define ASSERTCMP(X, OP, Y) \ 1243 do { \ 1244 } while(0) 1245 1246 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1247 do { \ 1248 } while(0) 1249 1250 #define ASSERTIF(C, X) \ 1251 do { \ 1252 } while(0) 1253 1254 #define ASSERTIFCMP(C, X, OP, Y) \ 1255 do { \ 1256 } while(0) 1257 1258 #endif /* __KDEBUGALL */ 1259