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/fs.h> 15 #include <linux/pagemap.h> 16 #include <linux/skbuff.h> 17 #include <linux/rxrpc.h> 18 #include <linux/key.h> 19 #include <linux/workqueue.h> 20 #include <linux/sched.h> 21 22 #include "afs.h" 23 #include "afs_vl.h" 24 25 #define AFS_CELL_MAX_ADDRS 15 26 27 struct pagevec; 28 struct afs_call; 29 30 typedef enum { 31 AFS_VL_NEW, /* new, uninitialised record */ 32 AFS_VL_CREATING, /* creating record */ 33 AFS_VL_VALID, /* record is pending */ 34 AFS_VL_NO_VOLUME, /* no such volume available */ 35 AFS_VL_UPDATING, /* update in progress */ 36 AFS_VL_VOLUME_DELETED, /* volume was deleted */ 37 AFS_VL_UNCERTAIN, /* uncertain state (update failed) */ 38 } __attribute__((packed)) afs_vlocation_state_t; 39 40 struct afs_mount_params { 41 bool rwpath; /* T if the parent should be considered R/W */ 42 bool force; /* T to force cell type */ 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 afs_cell *cell; /* cell in which to find volume */ 47 struct afs_volume *volume; /* volume record */ 48 struct key *key; /* key to use for secure mounting */ 49 }; 50 51 /* 52 * definition of how to wait for the completion of an operation 53 */ 54 struct afs_wait_mode { 55 /* RxRPC received message notification */ 56 void (*rx_wakeup)(struct afs_call *call); 57 58 /* synchronous call waiter and call dispatched notification */ 59 int (*wait)(struct afs_call *call); 60 61 /* asynchronous call completion */ 62 void (*async_complete)(void *reply, int error); 63 }; 64 65 extern const struct afs_wait_mode afs_sync_call; 66 extern const struct afs_wait_mode afs_async_call; 67 68 /* 69 * a record of an in-progress RxRPC call 70 */ 71 struct afs_call { 72 const struct afs_call_type *type; /* type of call */ 73 const struct afs_wait_mode *wait_mode; /* completion wait mode */ 74 wait_queue_head_t waitq; /* processes awaiting completion */ 75 struct work_struct async_work; /* asynchronous work processor */ 76 struct work_struct work; /* actual work processor */ 77 struct sk_buff_head rx_queue; /* received packets */ 78 struct rxrpc_call *rxcall; /* RxRPC call handle */ 79 struct key *key; /* security for this call */ 80 struct afs_server *server; /* server affected by incoming CM call */ 81 void *request; /* request data (first part) */ 82 struct address_space *mapping; /* page set */ 83 struct afs_writeback *wb; /* writeback being performed */ 84 void *buffer; /* reply receive buffer */ 85 void *reply; /* reply buffer (first part) */ 86 void *reply2; /* reply buffer (second part) */ 87 void *reply3; /* reply buffer (third part) */ 88 void *reply4; /* reply buffer (fourth part) */ 89 pgoff_t first; /* first page in mapping to deal with */ 90 pgoff_t last; /* last page in mapping to deal with */ 91 enum { /* call state */ 92 AFS_CALL_REQUESTING, /* request is being sent for outgoing call */ 93 AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */ 94 AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */ 95 AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */ 96 AFS_CALL_REPLYING, /* replying to incoming call */ 97 AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */ 98 AFS_CALL_COMPLETE, /* successfully completed */ 99 AFS_CALL_BUSY, /* server was busy */ 100 AFS_CALL_ABORTED, /* call was aborted */ 101 AFS_CALL_ERROR, /* call failed due to error */ 102 } state; 103 int error; /* error code */ 104 unsigned request_size; /* size of request data */ 105 unsigned reply_max; /* maximum size of reply */ 106 unsigned reply_size; /* current size of reply */ 107 unsigned first_offset; /* offset into mapping[first] */ 108 unsigned last_to; /* amount of mapping[last] */ 109 unsigned short offset; /* offset into received data store */ 110 unsigned char unmarshall; /* unmarshalling phase */ 111 bool incoming; /* T if incoming call */ 112 bool send_pages; /* T if data from mapping should be sent */ 113 u16 service_id; /* RxRPC service ID to call */ 114 __be16 port; /* target UDP port */ 115 __be32 operation_ID; /* operation ID for an incoming call */ 116 u32 count; /* count for use in unmarshalling */ 117 __be32 tmp; /* place to extract temporary data */ 118 afs_dataversion_t store_version; /* updated version expected from store */ 119 }; 120 121 struct afs_call_type { 122 const char *name; 123 124 /* deliver request or reply data to an call 125 * - returning an error will cause the call to be aborted 126 */ 127 int (*deliver)(struct afs_call *call, struct sk_buff *skb, 128 bool last); 129 130 /* map an abort code to an error number */ 131 int (*abort_to_error)(u32 abort_code); 132 133 /* clean up a call */ 134 void (*destructor)(struct afs_call *call); 135 }; 136 137 /* 138 * record of an outstanding writeback on a vnode 139 */ 140 struct afs_writeback { 141 struct list_head link; /* link in vnode->writebacks */ 142 struct work_struct writer; /* work item to perform the writeback */ 143 struct afs_vnode *vnode; /* vnode to which this write applies */ 144 struct key *key; /* owner of this write */ 145 wait_queue_head_t waitq; /* completion and ready wait queue */ 146 pgoff_t first; /* first page in batch */ 147 pgoff_t point; /* last page in current store op */ 148 pgoff_t last; /* last page in batch (inclusive) */ 149 unsigned offset_first; /* offset into first page of start of write */ 150 unsigned to_last; /* offset into last page of end of write */ 151 int num_conflicts; /* count of conflicting writes in list */ 152 int usage; 153 bool conflicts; /* T if has dependent conflicts */ 154 enum { 155 AFS_WBACK_SYNCING, /* synchronisation being performed */ 156 AFS_WBACK_PENDING, /* write pending */ 157 AFS_WBACK_CONFLICTING, /* conflicting writes posted */ 158 AFS_WBACK_WRITING, /* writing back */ 159 AFS_WBACK_COMPLETE /* the writeback record has been unlinked */ 160 } state __attribute__((packed)); 161 }; 162 163 /* 164 * AFS superblock private data 165 * - there's one superblock per volume 166 */ 167 struct afs_super_info { 168 struct afs_volume *volume; /* volume record */ 169 char rwparent; /* T if parent is R/W AFS volume */ 170 }; 171 172 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) 173 { 174 return sb->s_fs_info; 175 } 176 177 extern struct file_system_type afs_fs_type; 178 179 /* 180 * entry in the cached cell catalogue 181 */ 182 struct afs_cache_cell { 183 char name[AFS_MAXCELLNAME]; /* cell name (padded with NULs) */ 184 struct in_addr vl_servers[15]; /* cached cell VL servers */ 185 }; 186 187 /* 188 * AFS cell record 189 */ 190 struct afs_cell { 191 atomic_t usage; 192 struct list_head link; /* main cell list link */ 193 struct key *anonymous_key; /* anonymous user key for this cell */ 194 struct list_head proc_link; /* /proc cell list link */ 195 struct proc_dir_entry *proc_dir; /* /proc dir for this cell */ 196 #ifdef AFS_CACHING_SUPPORT 197 struct cachefs_cookie *cache; /* caching cookie */ 198 #endif 199 200 /* server record management */ 201 rwlock_t servers_lock; /* active server list lock */ 202 struct list_head servers; /* active server list */ 203 204 /* volume location record management */ 205 struct rw_semaphore vl_sem; /* volume management serialisation semaphore */ 206 struct list_head vl_list; /* cell's active VL record list */ 207 spinlock_t vl_lock; /* vl_list lock */ 208 unsigned short vl_naddrs; /* number of VL servers in addr list */ 209 unsigned short vl_curr_svix; /* current server index */ 210 struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */ 211 212 char name[0]; /* cell name - must go last */ 213 }; 214 215 /* 216 * entry in the cached volume location catalogue 217 */ 218 struct afs_cache_vlocation { 219 /* volume name (lowercase, padded with NULs) */ 220 uint8_t name[AFS_MAXVOLNAME + 1]; 221 222 uint8_t nservers; /* number of entries used in servers[] */ 223 uint8_t vidmask; /* voltype mask for vid[] */ 224 uint8_t srvtmask[8]; /* voltype masks for servers[] */ 225 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 226 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 227 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 228 229 afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */ 230 struct in_addr servers[8]; /* fileserver addresses */ 231 time_t rtime; /* last retrieval time */ 232 }; 233 234 /* 235 * volume -> vnode hash table entry 236 */ 237 struct afs_cache_vhash { 238 afs_voltype_t vtype; /* which volume variation */ 239 uint8_t hash_bucket; /* which hash bucket this represents */ 240 } __attribute__((packed)); 241 242 /* 243 * AFS volume location record 244 */ 245 struct afs_vlocation { 246 atomic_t usage; 247 time_t time_of_death; /* time at which put reduced usage to 0 */ 248 struct list_head link; /* link in cell volume location list */ 249 struct list_head grave; /* link in master graveyard list */ 250 struct list_head update; /* link in master update list */ 251 struct afs_cell *cell; /* cell to which volume belongs */ 252 #ifdef AFS_CACHING_SUPPORT 253 struct cachefs_cookie *cache; /* caching cookie */ 254 #endif 255 struct afs_cache_vlocation vldb; /* volume information DB record */ 256 struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ 257 wait_queue_head_t waitq; /* status change waitqueue */ 258 time_t update_at; /* time at which record should be updated */ 259 spinlock_t lock; /* access lock */ 260 afs_vlocation_state_t state; /* volume location state */ 261 unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ 262 unsigned short upd_busy_cnt; /* EBUSY count during update */ 263 bool valid; /* T if valid */ 264 }; 265 266 /* 267 * AFS fileserver record 268 */ 269 struct afs_server { 270 atomic_t usage; 271 time_t time_of_death; /* time at which put reduced usage to 0 */ 272 struct in_addr addr; /* server address */ 273 struct afs_cell *cell; /* cell in which server resides */ 274 struct list_head link; /* link in cell's server list */ 275 struct list_head grave; /* link in master graveyard list */ 276 struct rb_node master_rb; /* link in master by-addr tree */ 277 struct rw_semaphore sem; /* access lock */ 278 279 /* file service access */ 280 struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */ 281 unsigned long fs_act_jif; /* time at which last activity occurred */ 282 unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ 283 spinlock_t fs_lock; /* access lock */ 284 int fs_state; /* 0 or reason FS currently marked dead (-errno) */ 285 286 /* callback promise management */ 287 struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */ 288 struct delayed_work cb_updater; /* callback updater */ 289 struct delayed_work cb_break_work; /* collected break dispatcher */ 290 wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */ 291 spinlock_t cb_lock; /* access lock */ 292 struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */ 293 atomic_t cb_break_n; /* number of pending breaks */ 294 u8 cb_break_head; /* head of callback breaking ring */ 295 u8 cb_break_tail; /* tail of callback breaking ring */ 296 }; 297 298 /* 299 * AFS volume access record 300 */ 301 struct afs_volume { 302 atomic_t usage; 303 struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */ 304 struct afs_vlocation *vlocation; /* volume location */ 305 #ifdef AFS_CACHING_SUPPORT 306 struct cachefs_cookie *cache; /* caching cookie */ 307 #endif 308 afs_volid_t vid; /* volume ID */ 309 afs_voltype_t type; /* type of volume */ 310 char type_force; /* force volume type (suppress R/O -> R/W) */ 311 unsigned short nservers; /* number of server slots filled */ 312 unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */ 313 struct afs_server *servers[8]; /* servers on which volume resides (ordered) */ 314 struct rw_semaphore server_sem; /* lock for accessing current server */ 315 }; 316 317 /* 318 * vnode catalogue entry 319 */ 320 struct afs_cache_vnode { 321 afs_vnodeid_t vnode_id; /* vnode ID */ 322 unsigned vnode_unique; /* vnode ID uniquifier */ 323 afs_dataversion_t data_version; /* data version */ 324 }; 325 326 /* 327 * AFS inode private data 328 */ 329 struct afs_vnode { 330 struct inode vfs_inode; /* the VFS's inode record */ 331 332 struct afs_volume *volume; /* volume on which vnode resides */ 333 struct afs_server *server; /* server currently supplying this file */ 334 struct afs_fid fid; /* the file identifier for this inode */ 335 struct afs_file_status status; /* AFS status info for this file */ 336 #ifdef AFS_CACHING_SUPPORT 337 struct cachefs_cookie *cache; /* caching cookie */ 338 #endif 339 struct afs_permits *permits; /* cache of permits so far obtained */ 340 struct mutex permits_lock; /* lock for altering permits list */ 341 struct mutex validate_lock; /* lock for validating this vnode */ 342 wait_queue_head_t update_waitq; /* status fetch waitqueue */ 343 int update_cnt; /* number of outstanding ops that will update the 344 * status */ 345 spinlock_t writeback_lock; /* lock for writebacks */ 346 spinlock_t lock; /* waitqueue/flags lock */ 347 unsigned long flags; 348 #define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */ 349 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 350 #define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */ 351 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 352 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 353 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 354 #define AFS_VNODE_LOCKING 6 /* set if waiting for lock on vnode */ 355 #define AFS_VNODE_READLOCKED 7 /* set if vnode is read-locked on the server */ 356 #define AFS_VNODE_WRITELOCKED 8 /* set if vnode is write-locked on the server */ 357 #define AFS_VNODE_UNLOCKING 9 /* set if vnode is being unlocked on the server */ 358 359 long acl_order; /* ACL check count (callback break count) */ 360 361 struct list_head writebacks; /* alterations in pagecache that need writing */ 362 struct list_head pending_locks; /* locks waiting to be granted */ 363 struct list_head granted_locks; /* locks granted on this file */ 364 struct delayed_work lock_work; /* work to be done in locking */ 365 struct key *unlock_key; /* key to be used in unlocking */ 366 367 /* outstanding callback notification on this file */ 368 struct rb_node server_rb; /* link in server->fs_vnodes */ 369 struct rb_node cb_promise; /* link in server->cb_promises */ 370 struct work_struct cb_broken_work; /* work to be done on callback break */ 371 time_t cb_expires; /* time at which callback expires */ 372 time_t cb_expires_at; /* time used to order cb_promise */ 373 unsigned cb_version; /* callback version */ 374 unsigned cb_expiry; /* callback expiry time */ 375 afs_callback_type_t cb_type; /* type of callback */ 376 bool cb_promised; /* true if promise still holds */ 377 }; 378 379 /* 380 * cached security record for one user's attempt to access a vnode 381 */ 382 struct afs_permit { 383 struct key *key; /* RxRPC ticket holding a security context */ 384 afs_access_t access_mask; /* access mask for this key */ 385 }; 386 387 /* 388 * cache of security records from attempts to access a vnode 389 */ 390 struct afs_permits { 391 struct rcu_head rcu; /* disposal procedure */ 392 int count; /* number of records */ 393 struct afs_permit permits[0]; /* the permits so far examined */ 394 }; 395 396 /* 397 * record of one of a system's set of network interfaces 398 */ 399 struct afs_interface { 400 struct in_addr address; /* IPv4 address bound to interface */ 401 struct in_addr netmask; /* netmask applied to address */ 402 unsigned mtu; /* MTU of interface */ 403 }; 404 405 /* 406 * UUID definition [internet draft] 407 * - the timestamp is a 60-bit value, split 32/16/12, and goes in 100ns 408 * increments since midnight 15th October 1582 409 * - add AFS_UUID_TO_UNIX_TIME to convert unix time in 100ns units to UUID 410 * time 411 * - the clock sequence is a 14-bit counter to avoid duplicate times 412 */ 413 struct afs_uuid { 414 u32 time_low; /* low part of timestamp */ 415 u16 time_mid; /* mid part of timestamp */ 416 u16 time_hi_and_version; /* high part of timestamp and version */ 417 #define AFS_UUID_TO_UNIX_TIME 0x01b21dd213814000ULL 418 #define AFS_UUID_TIMEHI_MASK 0x0fff 419 #define AFS_UUID_VERSION_TIME 0x1000 /* time-based UUID */ 420 #define AFS_UUID_VERSION_NAME 0x3000 /* name-based UUID */ 421 #define AFS_UUID_VERSION_RANDOM 0x4000 /* (pseudo-)random generated UUID */ 422 u8 clock_seq_hi_and_reserved; /* clock seq hi and variant */ 423 #define AFS_UUID_CLOCKHI_MASK 0x3f 424 #define AFS_UUID_VARIANT_STD 0x80 425 u8 clock_seq_low; /* clock seq low */ 426 u8 node[6]; /* spatially unique node ID (MAC addr) */ 427 }; 428 429 /*****************************************************************************/ 430 /* 431 * callback.c 432 */ 433 extern void afs_init_callback_state(struct afs_server *); 434 extern void afs_broken_callback_work(struct work_struct *); 435 extern void afs_break_callbacks(struct afs_server *, size_t, 436 struct afs_callback[]); 437 extern void afs_discard_callback_on_delete(struct afs_vnode *); 438 extern void afs_give_up_callback(struct afs_vnode *); 439 extern void afs_dispatch_give_up_callbacks(struct work_struct *); 440 extern void afs_flush_callback_breaks(struct afs_server *); 441 extern int __init afs_callback_update_init(void); 442 extern void afs_callback_update_kill(void); 443 444 /* 445 * cell.c 446 */ 447 extern struct rw_semaphore afs_proc_cells_sem; 448 extern struct list_head afs_proc_cells; 449 #ifdef AFS_CACHING_SUPPORT 450 extern struct cachefs_index_def afs_cache_cell_index_def; 451 #endif 452 453 #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0) 454 extern int afs_cell_init(char *); 455 extern struct afs_cell *afs_cell_create(const char *, char *); 456 extern struct afs_cell *afs_cell_lookup(const char *, unsigned); 457 extern struct afs_cell *afs_grab_cell(struct afs_cell *); 458 extern void afs_put_cell(struct afs_cell *); 459 extern void afs_cell_purge(void); 460 461 /* 462 * cmservice.c 463 */ 464 extern bool afs_cm_incoming_call(struct afs_call *); 465 466 /* 467 * dir.c 468 */ 469 extern const struct inode_operations afs_dir_inode_operations; 470 extern const struct file_operations afs_dir_file_operations; 471 472 extern int afs_permission(struct inode *, int, struct nameidata *); 473 474 /* 475 * file.c 476 */ 477 extern const struct address_space_operations afs_fs_aops; 478 extern const struct inode_operations afs_file_inode_operations; 479 extern const struct file_operations afs_file_operations; 480 481 extern int afs_open(struct inode *, struct file *); 482 extern int afs_release(struct inode *, struct file *); 483 484 /* 485 * flock.c 486 */ 487 extern void __exit afs_kill_lock_manager(void); 488 extern void afs_lock_work(struct work_struct *); 489 extern void afs_lock_may_be_available(struct afs_vnode *); 490 extern int afs_lock(struct file *, int, struct file_lock *); 491 extern int afs_flock(struct file *, int, struct file_lock *); 492 493 /* 494 * fsclient.c 495 */ 496 extern int afs_fs_fetch_file_status(struct afs_server *, struct key *, 497 struct afs_vnode *, struct afs_volsync *, 498 const struct afs_wait_mode *); 499 extern int afs_fs_give_up_callbacks(struct afs_server *, 500 const struct afs_wait_mode *); 501 extern int afs_fs_fetch_data(struct afs_server *, struct key *, 502 struct afs_vnode *, off_t, size_t, struct page *, 503 const struct afs_wait_mode *); 504 extern int afs_fs_create(struct afs_server *, struct key *, 505 struct afs_vnode *, const char *, umode_t, 506 struct afs_fid *, struct afs_file_status *, 507 struct afs_callback *, 508 const struct afs_wait_mode *); 509 extern int afs_fs_remove(struct afs_server *, struct key *, 510 struct afs_vnode *, const char *, bool, 511 const struct afs_wait_mode *); 512 extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *, 513 struct afs_vnode *, const char *, 514 const struct afs_wait_mode *); 515 extern int afs_fs_symlink(struct afs_server *, struct key *, 516 struct afs_vnode *, const char *, const char *, 517 struct afs_fid *, struct afs_file_status *, 518 const struct afs_wait_mode *); 519 extern int afs_fs_rename(struct afs_server *, struct key *, 520 struct afs_vnode *, const char *, 521 struct afs_vnode *, const char *, 522 const struct afs_wait_mode *); 523 extern int afs_fs_store_data(struct afs_server *, struct afs_writeback *, 524 pgoff_t, pgoff_t, unsigned, unsigned, 525 const struct afs_wait_mode *); 526 extern int afs_fs_setattr(struct afs_server *, struct key *, 527 struct afs_vnode *, struct iattr *, 528 const struct afs_wait_mode *); 529 extern int afs_fs_get_volume_status(struct afs_server *, struct key *, 530 struct afs_vnode *, 531 struct afs_volume_status *, 532 const struct afs_wait_mode *); 533 extern int afs_fs_set_lock(struct afs_server *, struct key *, 534 struct afs_vnode *, afs_lock_type_t, 535 const struct afs_wait_mode *); 536 extern int afs_fs_extend_lock(struct afs_server *, struct key *, 537 struct afs_vnode *, 538 const struct afs_wait_mode *); 539 extern int afs_fs_release_lock(struct afs_server *, struct key *, 540 struct afs_vnode *, 541 const struct afs_wait_mode *); 542 543 /* 544 * inode.c 545 */ 546 extern struct inode *afs_iget(struct super_block *, struct key *, 547 struct afs_fid *, struct afs_file_status *, 548 struct afs_callback *); 549 extern void afs_zap_data(struct afs_vnode *); 550 extern int afs_validate(struct afs_vnode *, struct key *); 551 extern int afs_getattr(struct vfsmount *, struct dentry *, struct kstat *); 552 extern int afs_setattr(struct dentry *, struct iattr *); 553 extern void afs_clear_inode(struct inode *); 554 555 /* 556 * main.c 557 */ 558 extern struct afs_uuid afs_uuid; 559 #ifdef AFS_CACHING_SUPPORT 560 extern struct cachefs_netfs afs_cache_netfs; 561 #endif 562 563 /* 564 * misc.c 565 */ 566 extern int afs_abort_to_error(u32); 567 568 /* 569 * mntpt.c 570 */ 571 extern const struct inode_operations afs_mntpt_inode_operations; 572 extern const struct file_operations afs_mntpt_file_operations; 573 574 extern int afs_mntpt_check_symlink(struct afs_vnode *, struct key *); 575 extern void afs_mntpt_kill_timer(void); 576 extern void afs_umount_begin(struct vfsmount *, int); 577 578 /* 579 * proc.c 580 */ 581 extern int afs_proc_init(void); 582 extern void afs_proc_cleanup(void); 583 extern int afs_proc_cell_setup(struct afs_cell *); 584 extern void afs_proc_cell_remove(struct afs_cell *); 585 586 /* 587 * rxrpc.c 588 */ 589 extern int afs_open_socket(void); 590 extern void afs_close_socket(void); 591 extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t, 592 const struct afs_wait_mode *); 593 extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *, 594 size_t, size_t); 595 extern void afs_flat_call_destructor(struct afs_call *); 596 extern void afs_transfer_reply(struct afs_call *, struct sk_buff *); 597 extern void afs_send_empty_reply(struct afs_call *); 598 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 599 extern int afs_extract_data(struct afs_call *, struct sk_buff *, bool, void *, 600 size_t); 601 602 /* 603 * security.c 604 */ 605 extern void afs_clear_permits(struct afs_vnode *); 606 extern void afs_cache_permit(struct afs_vnode *, struct key *, long); 607 extern void afs_zap_permits(struct rcu_head *); 608 extern struct key *afs_request_key(struct afs_cell *); 609 extern int afs_permission(struct inode *, int, struct nameidata *); 610 611 /* 612 * server.c 613 */ 614 extern spinlock_t afs_server_peer_lock; 615 616 #define afs_get_server(S) \ 617 do { \ 618 _debug("GET SERVER %d", atomic_read(&(S)->usage)); \ 619 atomic_inc(&(S)->usage); \ 620 } while(0) 621 622 extern struct afs_server *afs_lookup_server(struct afs_cell *, 623 const struct in_addr *); 624 extern struct afs_server *afs_find_server(const struct in_addr *); 625 extern void afs_put_server(struct afs_server *); 626 extern void __exit afs_purge_servers(void); 627 628 /* 629 * super.c 630 */ 631 extern int afs_fs_init(void); 632 extern void afs_fs_exit(void); 633 634 /* 635 * use-rtnetlink.c 636 */ 637 extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); 638 extern int afs_get_MAC_address(u8 *, size_t); 639 640 /* 641 * vlclient.c 642 */ 643 #ifdef AFS_CACHING_SUPPORT 644 extern struct cachefs_index_def afs_vlocation_cache_index_def; 645 #endif 646 647 extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *, 648 const char *, struct afs_cache_vlocation *, 649 const struct afs_wait_mode *); 650 extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *, 651 afs_volid_t, afs_voltype_t, 652 struct afs_cache_vlocation *, 653 const struct afs_wait_mode *); 654 655 /* 656 * vlocation.c 657 */ 658 #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0) 659 660 extern int __init afs_vlocation_update_init(void); 661 extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *, 662 struct key *, 663 const char *, size_t); 664 extern void afs_put_vlocation(struct afs_vlocation *); 665 extern void afs_vlocation_purge(void); 666 667 /* 668 * vnode.c 669 */ 670 #ifdef AFS_CACHING_SUPPORT 671 extern struct cachefs_index_def afs_vnode_cache_index_def; 672 #endif 673 674 extern struct afs_timer_ops afs_vnode_cb_timed_out_ops; 675 676 static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 677 { 678 return container_of(inode, struct afs_vnode, vfs_inode); 679 } 680 681 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 682 { 683 return &vnode->vfs_inode; 684 } 685 686 extern void afs_vnode_finalise_status_update(struct afs_vnode *, 687 struct afs_server *); 688 extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *, 689 struct key *); 690 extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *, 691 off_t, size_t, struct page *); 692 extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *, 693 umode_t, struct afs_fid *, struct afs_file_status *, 694 struct afs_callback *, struct afs_server **); 695 extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *, 696 bool); 697 extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *, 698 const char *); 699 extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *, 700 const char *, struct afs_fid *, 701 struct afs_file_status *, struct afs_server **); 702 extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *, 703 struct key *, const char *, const char *); 704 extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t, 705 unsigned, unsigned); 706 extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *); 707 extern int afs_vnode_get_volume_status(struct afs_vnode *, struct key *, 708 struct afs_volume_status *); 709 extern int afs_vnode_set_lock(struct afs_vnode *, struct key *, 710 afs_lock_type_t); 711 extern int afs_vnode_extend_lock(struct afs_vnode *, struct key *); 712 extern int afs_vnode_release_lock(struct afs_vnode *, struct key *); 713 714 /* 715 * volume.c 716 */ 717 #ifdef AFS_CACHING_SUPPORT 718 extern struct cachefs_index_def afs_volume_cache_index_def; 719 #endif 720 721 #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0) 722 723 extern void afs_put_volume(struct afs_volume *); 724 extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *); 725 extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *); 726 extern int afs_volume_release_fileserver(struct afs_vnode *, 727 struct afs_server *, int); 728 729 /* 730 * write.c 731 */ 732 extern int afs_set_page_dirty(struct page *); 733 extern void afs_put_writeback(struct afs_writeback *); 734 extern int afs_prepare_write(struct file *, struct page *, unsigned, unsigned); 735 extern int afs_commit_write(struct file *, struct page *, unsigned, unsigned); 736 extern int afs_writepage(struct page *, struct writeback_control *); 737 extern int afs_writepages(struct address_space *, struct writeback_control *); 738 extern int afs_write_inode(struct inode *, int); 739 extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); 740 extern ssize_t afs_file_write(struct kiocb *, const struct iovec *, 741 unsigned long, loff_t); 742 extern int afs_writeback_all(struct afs_vnode *); 743 extern int afs_fsync(struct file *, struct dentry *, int); 744 745 746 /*****************************************************************************/ 747 /* 748 * debug tracing 749 */ 750 extern unsigned afs_debug; 751 752 #define dbgprintk(FMT,...) \ 753 printk("[%x%-6.6s] "FMT"\n", smp_processor_id(), current->comm ,##__VA_ARGS__) 754 755 /* make sure we maintain the format strings, even when debugging is disabled */ 756 static inline __attribute__((format(printf,1,2))) 757 void _dbprintk(const char *fmt, ...) 758 { 759 } 760 761 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__) 762 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__) 763 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 764 765 766 #if defined(__KDEBUG) 767 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 768 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 769 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 770 771 #elif defined(CONFIG_AFS_DEBUG) 772 #define AFS_DEBUG_KENTER 0x01 773 #define AFS_DEBUG_KLEAVE 0x02 774 #define AFS_DEBUG_KDEBUG 0x04 775 776 #define _enter(FMT,...) \ 777 do { \ 778 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 779 kenter(FMT,##__VA_ARGS__); \ 780 } while (0) 781 782 #define _leave(FMT,...) \ 783 do { \ 784 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 785 kleave(FMT,##__VA_ARGS__); \ 786 } while (0) 787 788 #define _debug(FMT,...) \ 789 do { \ 790 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 791 kdebug(FMT,##__VA_ARGS__); \ 792 } while (0) 793 794 #else 795 #define _enter(FMT,...) _dbprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__) 796 #define _leave(FMT,...) _dbprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__) 797 #define _debug(FMT,...) _dbprintk(" "FMT ,##__VA_ARGS__) 798 #endif 799 800 /* 801 * debug assertion checking 802 */ 803 #if 1 // defined(__KDEBUGALL) 804 805 #define ASSERT(X) \ 806 do { \ 807 if (unlikely(!(X))) { \ 808 printk(KERN_ERR "\n"); \ 809 printk(KERN_ERR "AFS: Assertion failed\n"); \ 810 BUG(); \ 811 } \ 812 } while(0) 813 814 #define ASSERTCMP(X, OP, Y) \ 815 do { \ 816 if (unlikely(!((X) OP (Y)))) { \ 817 printk(KERN_ERR "\n"); \ 818 printk(KERN_ERR "AFS: Assertion failed\n"); \ 819 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 820 (unsigned long)(X), (unsigned long)(Y)); \ 821 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 822 (unsigned long)(X), (unsigned long)(Y)); \ 823 BUG(); \ 824 } \ 825 } while(0) 826 827 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 828 do { \ 829 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 830 printk(KERN_ERR "\n"); \ 831 printk(KERN_ERR "AFS: Assertion failed\n"); \ 832 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 833 (unsigned long)(L), (unsigned long)(N), \ 834 (unsigned long)(H)); \ 835 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 836 (unsigned long)(L), (unsigned long)(N), \ 837 (unsigned long)(H)); \ 838 BUG(); \ 839 } \ 840 } while(0) 841 842 #define ASSERTIF(C, X) \ 843 do { \ 844 if (unlikely((C) && !(X))) { \ 845 printk(KERN_ERR "\n"); \ 846 printk(KERN_ERR "AFS: Assertion failed\n"); \ 847 BUG(); \ 848 } \ 849 } while(0) 850 851 #define ASSERTIFCMP(C, X, OP, Y) \ 852 do { \ 853 if (unlikely((C) && !((X) OP (Y)))) { \ 854 printk(KERN_ERR "\n"); \ 855 printk(KERN_ERR "AFS: Assertion failed\n"); \ 856 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 857 (unsigned long)(X), (unsigned long)(Y)); \ 858 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 859 (unsigned long)(X), (unsigned long)(Y)); \ 860 BUG(); \ 861 } \ 862 } while(0) 863 864 #else 865 866 #define ASSERT(X) \ 867 do { \ 868 } while(0) 869 870 #define ASSERTCMP(X, OP, Y) \ 871 do { \ 872 } while(0) 873 874 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 875 do { \ 876 } while(0) 877 878 #define ASSERTIF(C, X) \ 879 do { \ 880 } while(0) 881 882 #define ASSERTIFCMP(C, X, OP, Y) \ 883 do { \ 884 } while(0) 885 886 #endif /* __KDEBUGALL */ 887