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