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/af_rxrpc.h> 25 26 #include "afs.h" 27 #include "afs_vl.h" 28 29 #define AFS_CELL_MAX_ADDRS 15 30 31 struct pagevec; 32 struct afs_call; 33 34 typedef enum { 35 AFS_VL_NEW, /* new, uninitialised record */ 36 AFS_VL_CREATING, /* creating record */ 37 AFS_VL_VALID, /* record is pending */ 38 AFS_VL_NO_VOLUME, /* no such volume available */ 39 AFS_VL_UPDATING, /* update in progress */ 40 AFS_VL_VOLUME_DELETED, /* volume was deleted */ 41 AFS_VL_UNCERTAIN, /* uncertain state (update failed) */ 42 } __attribute__((packed)) afs_vlocation_state_t; 43 44 struct afs_mount_params { 45 bool rwpath; /* T if the parent should be considered R/W */ 46 bool force; /* T to force cell type */ 47 bool autocell; /* T if set auto mount operation */ 48 afs_voltype_t type; /* type of volume requested */ 49 int volnamesz; /* size of volume name */ 50 const char *volname; /* name of volume to mount */ 51 struct afs_cell *cell; /* cell in which to find volume */ 52 struct afs_volume *volume; /* volume record */ 53 struct key *key; /* key to use for secure mounting */ 54 }; 55 56 enum afs_call_state { 57 AFS_CALL_REQUESTING, /* request is being sent for outgoing call */ 58 AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */ 59 AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */ 60 AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */ 61 AFS_CALL_REPLYING, /* replying to incoming call */ 62 AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */ 63 AFS_CALL_COMPLETE, /* Completed or failed */ 64 }; 65 /* 66 * a record of an in-progress RxRPC call 67 */ 68 struct afs_call { 69 const struct afs_call_type *type; /* type of call */ 70 wait_queue_head_t waitq; /* processes awaiting completion */ 71 struct work_struct async_work; /* async I/O processor */ 72 struct work_struct work; /* actual work processor */ 73 struct rxrpc_call *rxcall; /* RxRPC call handle */ 74 struct key *key; /* security for this call */ 75 struct afs_server *server; /* server affected by incoming CM call */ 76 void *request; /* request data (first part) */ 77 struct address_space *mapping; /* page set */ 78 struct afs_writeback *wb; /* writeback being performed */ 79 void *buffer; /* reply receive buffer */ 80 void *reply; /* reply buffer (first part) */ 81 void *reply2; /* reply buffer (second part) */ 82 void *reply3; /* reply buffer (third part) */ 83 void *reply4; /* reply buffer (fourth part) */ 84 pgoff_t first; /* first page in mapping to deal with */ 85 pgoff_t last; /* last page in mapping to deal with */ 86 size_t offset; /* offset into received data store */ 87 atomic_t usage; 88 enum afs_call_state state; 89 int error; /* error code */ 90 u32 abort_code; /* Remote abort ID or 0 */ 91 unsigned request_size; /* size of request data */ 92 unsigned reply_max; /* maximum size of reply */ 93 unsigned first_offset; /* offset into mapping[first] */ 94 union { 95 unsigned last_to; /* amount of mapping[last] */ 96 unsigned count2; /* count used in unmarshalling */ 97 }; 98 unsigned char unmarshall; /* unmarshalling phase */ 99 bool incoming; /* T if incoming call */ 100 bool send_pages; /* T if data from mapping should be sent */ 101 bool need_attention; /* T if RxRPC poked us */ 102 bool async; /* T if asynchronous */ 103 u16 service_id; /* RxRPC service ID to call */ 104 __be16 port; /* target UDP port */ 105 u32 operation_ID; /* operation ID for an incoming call */ 106 u32 count; /* count for use in unmarshalling */ 107 __be32 tmp; /* place to extract temporary data */ 108 afs_dataversion_t store_version; /* updated version expected from store */ 109 }; 110 111 struct afs_call_type { 112 const char *name; 113 114 /* deliver request or reply data to an call 115 * - returning an error will cause the call to be aborted 116 */ 117 int (*deliver)(struct afs_call *call); 118 119 /* map an abort code to an error number */ 120 int (*abort_to_error)(u32 abort_code); 121 122 /* clean up a call */ 123 void (*destructor)(struct afs_call *call); 124 125 /* Work function */ 126 void (*work)(struct work_struct *work); 127 }; 128 129 /* 130 * Record of an outstanding read operation on a vnode. 131 */ 132 struct afs_read { 133 loff_t pos; /* Where to start reading */ 134 loff_t len; /* How much we're asking for */ 135 loff_t actual_len; /* How much we're actually getting */ 136 loff_t remain; /* Amount remaining */ 137 atomic_t usage; 138 unsigned int index; /* Which page we're reading into */ 139 unsigned int nr_pages; 140 void (*page_done)(struct afs_call *, struct afs_read *); 141 struct page *pages[]; 142 }; 143 144 /* 145 * record of an outstanding writeback on a vnode 146 */ 147 struct afs_writeback { 148 struct list_head link; /* link in vnode->writebacks */ 149 struct work_struct writer; /* work item to perform the writeback */ 150 struct afs_vnode *vnode; /* vnode to which this write applies */ 151 struct key *key; /* owner of this write */ 152 wait_queue_head_t waitq; /* completion and ready wait queue */ 153 pgoff_t first; /* first page in batch */ 154 pgoff_t point; /* last page in current store op */ 155 pgoff_t last; /* last page in batch (inclusive) */ 156 unsigned offset_first; /* offset into first page of start of write */ 157 unsigned to_last; /* offset into last page of end of write */ 158 int num_conflicts; /* count of conflicting writes in list */ 159 int usage; 160 bool conflicts; /* T if has dependent conflicts */ 161 enum { 162 AFS_WBACK_SYNCING, /* synchronisation being performed */ 163 AFS_WBACK_PENDING, /* write pending */ 164 AFS_WBACK_CONFLICTING, /* conflicting writes posted */ 165 AFS_WBACK_WRITING, /* writing back */ 166 AFS_WBACK_COMPLETE /* the writeback record has been unlinked */ 167 } state __attribute__((packed)); 168 }; 169 170 /* 171 * AFS superblock private data 172 * - there's one superblock per volume 173 */ 174 struct afs_super_info { 175 struct afs_volume *volume; /* volume record */ 176 char rwparent; /* T if parent is R/W AFS volume */ 177 }; 178 179 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) 180 { 181 return sb->s_fs_info; 182 } 183 184 extern struct file_system_type afs_fs_type; 185 186 /* 187 * entry in the cached cell catalogue 188 */ 189 struct afs_cache_cell { 190 char name[AFS_MAXCELLNAME]; /* cell name (padded with NULs) */ 191 struct in_addr vl_servers[15]; /* cached cell VL servers */ 192 }; 193 194 /* 195 * AFS cell record 196 */ 197 struct afs_cell { 198 atomic_t usage; 199 struct list_head link; /* main cell list link */ 200 struct key *anonymous_key; /* anonymous user key for this cell */ 201 struct list_head proc_link; /* /proc cell list link */ 202 #ifdef CONFIG_AFS_FSCACHE 203 struct fscache_cookie *cache; /* caching cookie */ 204 #endif 205 206 /* server record management */ 207 rwlock_t servers_lock; /* active server list lock */ 208 struct list_head servers; /* active server list */ 209 210 /* volume location record management */ 211 struct rw_semaphore vl_sem; /* volume management serialisation semaphore */ 212 struct list_head vl_list; /* cell's active VL record list */ 213 spinlock_t vl_lock; /* vl_list lock */ 214 unsigned short vl_naddrs; /* number of VL servers in addr list */ 215 unsigned short vl_curr_svix; /* current server index */ 216 struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */ 217 218 char name[0]; /* cell name - must go last */ 219 }; 220 221 /* 222 * entry in the cached volume location catalogue 223 */ 224 struct afs_cache_vlocation { 225 /* volume name (lowercase, padded with NULs) */ 226 uint8_t name[AFS_MAXVOLNAME + 1]; 227 228 uint8_t nservers; /* number of entries used in servers[] */ 229 uint8_t vidmask; /* voltype mask for vid[] */ 230 uint8_t srvtmask[8]; /* voltype masks for servers[] */ 231 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 232 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 233 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 234 235 afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */ 236 struct in_addr servers[8]; /* fileserver addresses */ 237 time_t rtime; /* last retrieval time */ 238 }; 239 240 /* 241 * volume -> vnode hash table entry 242 */ 243 struct afs_cache_vhash { 244 afs_voltype_t vtype; /* which volume variation */ 245 uint8_t hash_bucket; /* which hash bucket this represents */ 246 } __attribute__((packed)); 247 248 /* 249 * AFS volume location record 250 */ 251 struct afs_vlocation { 252 atomic_t usage; 253 time64_t time_of_death; /* time at which put reduced usage to 0 */ 254 struct list_head link; /* link in cell volume location list */ 255 struct list_head grave; /* link in master graveyard list */ 256 struct list_head update; /* link in master update list */ 257 struct afs_cell *cell; /* cell to which volume belongs */ 258 #ifdef CONFIG_AFS_FSCACHE 259 struct fscache_cookie *cache; /* caching cookie */ 260 #endif 261 struct afs_cache_vlocation vldb; /* volume information DB record */ 262 struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ 263 wait_queue_head_t waitq; /* status change waitqueue */ 264 time64_t update_at; /* time at which record should be updated */ 265 spinlock_t lock; /* access lock */ 266 afs_vlocation_state_t state; /* volume location state */ 267 unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ 268 unsigned short upd_busy_cnt; /* EBUSY count during update */ 269 bool valid; /* T if valid */ 270 }; 271 272 /* 273 * AFS fileserver record 274 */ 275 struct afs_server { 276 atomic_t usage; 277 time64_t time_of_death; /* time at which put reduced usage to 0 */ 278 struct in_addr addr; /* server address */ 279 struct afs_cell *cell; /* cell in which server resides */ 280 struct list_head link; /* link in cell's server list */ 281 struct list_head grave; /* link in master graveyard list */ 282 struct rb_node master_rb; /* link in master by-addr tree */ 283 struct rw_semaphore sem; /* access lock */ 284 285 /* file service access */ 286 struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */ 287 unsigned long fs_act_jif; /* time at which last activity occurred */ 288 unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ 289 spinlock_t fs_lock; /* access lock */ 290 int fs_state; /* 0 or reason FS currently marked dead (-errno) */ 291 292 /* callback promise management */ 293 struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */ 294 struct delayed_work cb_updater; /* callback updater */ 295 struct delayed_work cb_break_work; /* collected break dispatcher */ 296 wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */ 297 spinlock_t cb_lock; /* access lock */ 298 struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */ 299 atomic_t cb_break_n; /* number of pending breaks */ 300 u8 cb_break_head; /* head of callback breaking ring */ 301 u8 cb_break_tail; /* tail of callback breaking ring */ 302 }; 303 304 /* 305 * AFS volume access record 306 */ 307 struct afs_volume { 308 atomic_t usage; 309 struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */ 310 struct afs_vlocation *vlocation; /* volume location */ 311 #ifdef CONFIG_AFS_FSCACHE 312 struct fscache_cookie *cache; /* caching cookie */ 313 #endif 314 afs_volid_t vid; /* volume ID */ 315 afs_voltype_t type; /* type of volume */ 316 char type_force; /* force volume type (suppress R/O -> R/W) */ 317 unsigned short nservers; /* number of server slots filled */ 318 unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */ 319 struct afs_server *servers[8]; /* servers on which volume resides (ordered) */ 320 struct rw_semaphore server_sem; /* lock for accessing current server */ 321 }; 322 323 /* 324 * vnode catalogue entry 325 */ 326 struct afs_cache_vnode { 327 afs_vnodeid_t vnode_id; /* vnode ID */ 328 unsigned vnode_unique; /* vnode ID uniquifier */ 329 afs_dataversion_t data_version; /* data version */ 330 }; 331 332 /* 333 * AFS inode private data 334 */ 335 struct afs_vnode { 336 struct inode vfs_inode; /* the VFS's inode record */ 337 338 struct afs_volume *volume; /* volume on which vnode resides */ 339 struct afs_server *server; /* server currently supplying this file */ 340 struct afs_fid fid; /* the file identifier for this inode */ 341 struct afs_file_status status; /* AFS status info for this file */ 342 #ifdef CONFIG_AFS_FSCACHE 343 struct fscache_cookie *cache; /* caching cookie */ 344 #endif 345 struct afs_permits *permits; /* cache of permits so far obtained */ 346 struct mutex permits_lock; /* lock for altering permits list */ 347 struct mutex validate_lock; /* lock for validating this vnode */ 348 wait_queue_head_t update_waitq; /* status fetch waitqueue */ 349 int update_cnt; /* number of outstanding ops that will update the 350 * status */ 351 spinlock_t writeback_lock; /* lock for writebacks */ 352 spinlock_t lock; /* waitqueue/flags lock */ 353 unsigned long flags; 354 #define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */ 355 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 356 #define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */ 357 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 358 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 359 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 360 #define AFS_VNODE_LOCKING 6 /* set if waiting for lock on vnode */ 361 #define AFS_VNODE_READLOCKED 7 /* set if vnode is read-locked on the server */ 362 #define AFS_VNODE_WRITELOCKED 8 /* set if vnode is write-locked on the server */ 363 #define AFS_VNODE_UNLOCKING 9 /* set if vnode is being unlocked on the server */ 364 #define AFS_VNODE_AUTOCELL 10 /* set if Vnode is an auto mount point */ 365 #define AFS_VNODE_PSEUDODIR 11 /* set if Vnode is a pseudo directory */ 366 367 long acl_order; /* ACL check count (callback break count) */ 368 369 struct list_head writebacks; /* alterations in pagecache that need writing */ 370 struct list_head pending_locks; /* locks waiting to be granted */ 371 struct list_head granted_locks; /* locks granted on this file */ 372 struct delayed_work lock_work; /* work to be done in locking */ 373 struct key *unlock_key; /* key to be used in unlocking */ 374 375 /* outstanding callback notification on this file */ 376 struct rb_node server_rb; /* link in server->fs_vnodes */ 377 struct rb_node cb_promise; /* link in server->cb_promises */ 378 struct work_struct cb_broken_work; /* work to be done on callback break */ 379 time64_t cb_expires; /* time at which callback expires */ 380 time64_t cb_expires_at; /* time used to order cb_promise */ 381 unsigned cb_version; /* callback version */ 382 unsigned cb_expiry; /* callback expiry time */ 383 afs_callback_type_t cb_type; /* type of callback */ 384 bool cb_promised; /* true if promise still holds */ 385 }; 386 387 /* 388 * cached security record for one user's attempt to access a vnode 389 */ 390 struct afs_permit { 391 struct key *key; /* RxRPC ticket holding a security context */ 392 afs_access_t access_mask; /* access mask for this key */ 393 }; 394 395 /* 396 * cache of security records from attempts to access a vnode 397 */ 398 struct afs_permits { 399 struct rcu_head rcu; /* disposal procedure */ 400 int count; /* number of records */ 401 struct afs_permit permits[0]; /* the permits so far examined */ 402 }; 403 404 /* 405 * record of one of a system's set of network interfaces 406 */ 407 struct afs_interface { 408 struct in_addr address; /* IPv4 address bound to interface */ 409 struct in_addr netmask; /* netmask applied to address */ 410 unsigned mtu; /* MTU of interface */ 411 }; 412 413 struct afs_uuid { 414 __be32 time_low; /* low part of timestamp */ 415 __be16 time_mid; /* mid part of timestamp */ 416 __be16 time_hi_and_version; /* high part of timestamp and version */ 417 __u8 clock_seq_hi_and_reserved; /* clock seq hi and variant */ 418 __u8 clock_seq_low; /* clock seq low */ 419 __u8 node[6]; /* spatially unique node ID (MAC addr) */ 420 }; 421 422 /*****************************************************************************/ 423 /* 424 * cache.c 425 */ 426 #ifdef CONFIG_AFS_FSCACHE 427 extern struct fscache_netfs afs_cache_netfs; 428 extern struct fscache_cookie_def afs_cell_cache_index_def; 429 extern struct fscache_cookie_def afs_vlocation_cache_index_def; 430 extern struct fscache_cookie_def afs_volume_cache_index_def; 431 extern struct fscache_cookie_def afs_vnode_cache_index_def; 432 #else 433 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) 434 #define afs_vlocation_cache_index_def (*(struct fscache_cookie_def *) NULL) 435 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) 436 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) 437 #endif 438 439 /* 440 * callback.c 441 */ 442 extern void afs_init_callback_state(struct afs_server *); 443 extern void afs_broken_callback_work(struct work_struct *); 444 extern void afs_break_callbacks(struct afs_server *, size_t, 445 struct afs_callback[]); 446 extern void afs_discard_callback_on_delete(struct afs_vnode *); 447 extern void afs_give_up_callback(struct afs_vnode *); 448 extern void afs_dispatch_give_up_callbacks(struct work_struct *); 449 extern void afs_flush_callback_breaks(struct afs_server *); 450 extern int __init afs_callback_update_init(void); 451 extern void afs_callback_update_kill(void); 452 453 /* 454 * cell.c 455 */ 456 extern struct rw_semaphore afs_proc_cells_sem; 457 extern struct list_head afs_proc_cells; 458 459 #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0) 460 extern int afs_cell_init(char *); 461 extern struct afs_cell *afs_cell_create(const char *, unsigned, char *, bool); 462 extern struct afs_cell *afs_cell_lookup(const char *, unsigned, bool); 463 extern struct afs_cell *afs_grab_cell(struct afs_cell *); 464 extern void afs_put_cell(struct afs_cell *); 465 extern void afs_cell_purge(void); 466 467 /* 468 * cmservice.c 469 */ 470 extern bool afs_cm_incoming_call(struct afs_call *); 471 472 /* 473 * dir.c 474 */ 475 extern const struct inode_operations afs_dir_inode_operations; 476 extern const struct dentry_operations afs_fs_dentry_operations; 477 extern const struct file_operations afs_dir_file_operations; 478 479 /* 480 * file.c 481 */ 482 extern const struct address_space_operations afs_fs_aops; 483 extern const struct inode_operations afs_file_inode_operations; 484 extern const struct file_operations afs_file_operations; 485 486 extern int afs_open(struct inode *, struct file *); 487 extern int afs_release(struct inode *, struct file *); 488 extern int afs_page_filler(void *, struct page *); 489 extern void afs_put_read(struct afs_read *); 490 491 /* 492 * flock.c 493 */ 494 extern void __exit afs_kill_lock_manager(void); 495 extern void afs_lock_work(struct work_struct *); 496 extern void afs_lock_may_be_available(struct afs_vnode *); 497 extern int afs_lock(struct file *, int, struct file_lock *); 498 extern int afs_flock(struct file *, int, struct file_lock *); 499 500 /* 501 * fsclient.c 502 */ 503 extern int afs_fs_fetch_file_status(struct afs_server *, struct key *, 504 struct afs_vnode *, struct afs_volsync *, 505 bool); 506 extern int afs_fs_give_up_callbacks(struct afs_server *, bool); 507 extern int afs_fs_fetch_data(struct afs_server *, struct key *, 508 struct afs_vnode *, struct afs_read *, bool); 509 extern int afs_fs_create(struct afs_server *, struct key *, 510 struct afs_vnode *, const char *, umode_t, 511 struct afs_fid *, struct afs_file_status *, 512 struct afs_callback *, bool); 513 extern int afs_fs_remove(struct afs_server *, struct key *, 514 struct afs_vnode *, const char *, bool, bool); 515 extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *, 516 struct afs_vnode *, const char *, bool); 517 extern int afs_fs_symlink(struct afs_server *, struct key *, 518 struct afs_vnode *, const char *, const char *, 519 struct afs_fid *, struct afs_file_status *, bool); 520 extern int afs_fs_rename(struct afs_server *, struct key *, 521 struct afs_vnode *, const char *, 522 struct afs_vnode *, const char *, bool); 523 extern int afs_fs_store_data(struct afs_server *, struct afs_writeback *, 524 pgoff_t, pgoff_t, unsigned, unsigned, bool); 525 extern int afs_fs_setattr(struct afs_server *, struct key *, 526 struct afs_vnode *, struct iattr *, bool); 527 extern int afs_fs_get_volume_status(struct afs_server *, struct key *, 528 struct afs_vnode *, 529 struct afs_volume_status *, bool); 530 extern int afs_fs_set_lock(struct afs_server *, struct key *, 531 struct afs_vnode *, afs_lock_type_t, bool); 532 extern int afs_fs_extend_lock(struct afs_server *, struct key *, 533 struct afs_vnode *, bool); 534 extern int afs_fs_release_lock(struct afs_server *, struct key *, 535 struct afs_vnode *, bool); 536 537 /* 538 * inode.c 539 */ 540 extern struct inode *afs_iget_autocell(struct inode *, const char *, int, 541 struct key *); 542 extern struct inode *afs_iget(struct super_block *, struct key *, 543 struct afs_fid *, struct afs_file_status *, 544 struct afs_callback *); 545 extern void afs_zap_data(struct afs_vnode *); 546 extern int afs_validate(struct afs_vnode *, struct key *); 547 extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); 548 extern int afs_setattr(struct dentry *, struct iattr *); 549 extern void afs_evict_inode(struct inode *); 550 extern int afs_drop_inode(struct inode *); 551 552 /* 553 * main.c 554 */ 555 extern struct workqueue_struct *afs_wq; 556 extern struct afs_uuid afs_uuid; 557 558 /* 559 * misc.c 560 */ 561 extern int afs_abort_to_error(u32); 562 563 /* 564 * mntpt.c 565 */ 566 extern const struct inode_operations afs_mntpt_inode_operations; 567 extern const struct inode_operations afs_autocell_inode_operations; 568 extern const struct file_operations afs_mntpt_file_operations; 569 570 extern struct vfsmount *afs_d_automount(struct path *); 571 extern void afs_mntpt_kill_timer(void); 572 573 /* 574 * netdevices.c 575 */ 576 extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); 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 struct socket *afs_socket; 590 extern atomic_t afs_outstanding_calls; 591 592 extern int afs_open_socket(void); 593 extern void afs_close_socket(void); 594 extern void afs_put_call(struct afs_call *); 595 extern int afs_queue_call_work(struct afs_call *); 596 extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t, bool); 597 extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *, 598 size_t, size_t); 599 extern void afs_flat_call_destructor(struct afs_call *); 600 extern void afs_send_empty_reply(struct afs_call *); 601 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 602 extern int afs_extract_data(struct afs_call *, void *, size_t, bool); 603 604 static inline int afs_transfer_reply(struct afs_call *call) 605 { 606 return afs_extract_data(call, call->buffer, call->reply_max, false); 607 } 608 609 /* 610 * security.c 611 */ 612 extern void afs_clear_permits(struct afs_vnode *); 613 extern void afs_cache_permit(struct afs_vnode *, struct key *, long); 614 extern void afs_zap_permits(struct rcu_head *); 615 extern struct key *afs_request_key(struct afs_cell *); 616 extern int afs_permission(struct inode *, int); 617 618 /* 619 * server.c 620 */ 621 extern spinlock_t afs_server_peer_lock; 622 623 #define afs_get_server(S) \ 624 do { \ 625 _debug("GET SERVER %d", atomic_read(&(S)->usage)); \ 626 atomic_inc(&(S)->usage); \ 627 } while(0) 628 629 extern struct afs_server *afs_lookup_server(struct afs_cell *, 630 const struct in_addr *); 631 extern struct afs_server *afs_find_server(const struct sockaddr_rxrpc *); 632 extern void afs_put_server(struct afs_server *); 633 extern void __exit afs_purge_servers(void); 634 635 /* 636 * super.c 637 */ 638 extern int afs_fs_init(void); 639 extern void afs_fs_exit(void); 640 641 /* 642 * vlclient.c 643 */ 644 extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *, 645 const char *, struct afs_cache_vlocation *, 646 bool); 647 extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *, 648 afs_volid_t, afs_voltype_t, 649 struct afs_cache_vlocation *, bool); 650 651 /* 652 * vlocation.c 653 */ 654 #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0) 655 656 extern int __init afs_vlocation_update_init(void); 657 extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *, 658 struct key *, 659 const char *, size_t); 660 extern void afs_put_vlocation(struct afs_vlocation *); 661 extern void afs_vlocation_purge(void); 662 663 /* 664 * vnode.c 665 */ 666 static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 667 { 668 return container_of(inode, struct afs_vnode, vfs_inode); 669 } 670 671 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 672 { 673 return &vnode->vfs_inode; 674 } 675 676 extern void afs_vnode_finalise_status_update(struct afs_vnode *, 677 struct afs_server *); 678 extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *, 679 struct key *); 680 extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *, 681 struct afs_read *); 682 extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *, 683 umode_t, struct afs_fid *, struct afs_file_status *, 684 struct afs_callback *, struct afs_server **); 685 extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *, 686 bool); 687 extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *, 688 const char *); 689 extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *, 690 const char *, struct afs_fid *, 691 struct afs_file_status *, struct afs_server **); 692 extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *, 693 struct key *, const char *, const char *); 694 extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t, 695 unsigned, unsigned); 696 extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *); 697 extern int afs_vnode_get_volume_status(struct afs_vnode *, struct key *, 698 struct afs_volume_status *); 699 extern int afs_vnode_set_lock(struct afs_vnode *, struct key *, 700 afs_lock_type_t); 701 extern int afs_vnode_extend_lock(struct afs_vnode *, struct key *); 702 extern int afs_vnode_release_lock(struct afs_vnode *, struct key *); 703 704 /* 705 * volume.c 706 */ 707 #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0) 708 709 extern void afs_put_volume(struct afs_volume *); 710 extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *); 711 extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *); 712 extern int afs_volume_release_fileserver(struct afs_vnode *, 713 struct afs_server *, int); 714 715 /* 716 * write.c 717 */ 718 extern int afs_set_page_dirty(struct page *); 719 extern void afs_put_writeback(struct afs_writeback *); 720 extern int afs_write_begin(struct file *file, struct address_space *mapping, 721 loff_t pos, unsigned len, unsigned flags, 722 struct page **pagep, void **fsdata); 723 extern int afs_write_end(struct file *file, struct address_space *mapping, 724 loff_t pos, unsigned len, unsigned copied, 725 struct page *page, void *fsdata); 726 extern int afs_writepage(struct page *, struct writeback_control *); 727 extern int afs_writepages(struct address_space *, struct writeback_control *); 728 extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); 729 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); 730 extern int afs_writeback_all(struct afs_vnode *); 731 extern int afs_flush(struct file *, fl_owner_t); 732 extern int afs_fsync(struct file *, loff_t, loff_t, int); 733 734 /* 735 * xattr.c 736 */ 737 extern const struct xattr_handler *afs_xattr_handlers[]; 738 extern ssize_t afs_listxattr(struct dentry *, char *, size_t); 739 740 /*****************************************************************************/ 741 /* 742 * debug tracing 743 */ 744 #include <trace/events/afs.h> 745 746 extern unsigned afs_debug; 747 748 #define dbgprintk(FMT,...) \ 749 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 750 751 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 752 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 753 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 754 755 756 #if defined(__KDEBUG) 757 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 758 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 759 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 760 761 #elif defined(CONFIG_AFS_DEBUG) 762 #define AFS_DEBUG_KENTER 0x01 763 #define AFS_DEBUG_KLEAVE 0x02 764 #define AFS_DEBUG_KDEBUG 0x04 765 766 #define _enter(FMT,...) \ 767 do { \ 768 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 769 kenter(FMT,##__VA_ARGS__); \ 770 } while (0) 771 772 #define _leave(FMT,...) \ 773 do { \ 774 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 775 kleave(FMT,##__VA_ARGS__); \ 776 } while (0) 777 778 #define _debug(FMT,...) \ 779 do { \ 780 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 781 kdebug(FMT,##__VA_ARGS__); \ 782 } while (0) 783 784 #else 785 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 786 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 787 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 788 #endif 789 790 /* 791 * debug assertion checking 792 */ 793 #if 1 // defined(__KDEBUGALL) 794 795 #define ASSERT(X) \ 796 do { \ 797 if (unlikely(!(X))) { \ 798 printk(KERN_ERR "\n"); \ 799 printk(KERN_ERR "AFS: Assertion failed\n"); \ 800 BUG(); \ 801 } \ 802 } while(0) 803 804 #define ASSERTCMP(X, OP, Y) \ 805 do { \ 806 if (unlikely(!((X) OP (Y)))) { \ 807 printk(KERN_ERR "\n"); \ 808 printk(KERN_ERR "AFS: Assertion failed\n"); \ 809 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 810 (unsigned long)(X), (unsigned long)(Y)); \ 811 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 812 (unsigned long)(X), (unsigned long)(Y)); \ 813 BUG(); \ 814 } \ 815 } while(0) 816 817 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 818 do { \ 819 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 820 printk(KERN_ERR "\n"); \ 821 printk(KERN_ERR "AFS: Assertion failed\n"); \ 822 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 823 (unsigned long)(L), (unsigned long)(N), \ 824 (unsigned long)(H)); \ 825 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 826 (unsigned long)(L), (unsigned long)(N), \ 827 (unsigned long)(H)); \ 828 BUG(); \ 829 } \ 830 } while(0) 831 832 #define ASSERTIF(C, X) \ 833 do { \ 834 if (unlikely((C) && !(X))) { \ 835 printk(KERN_ERR "\n"); \ 836 printk(KERN_ERR "AFS: Assertion failed\n"); \ 837 BUG(); \ 838 } \ 839 } while(0) 840 841 #define ASSERTIFCMP(C, X, OP, Y) \ 842 do { \ 843 if (unlikely((C) && !((X) OP (Y)))) { \ 844 printk(KERN_ERR "\n"); \ 845 printk(KERN_ERR "AFS: Assertion failed\n"); \ 846 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 847 (unsigned long)(X), (unsigned long)(Y)); \ 848 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 849 (unsigned long)(X), (unsigned long)(Y)); \ 850 BUG(); \ 851 } \ 852 } while(0) 853 854 #else 855 856 #define ASSERT(X) \ 857 do { \ 858 } while(0) 859 860 #define ASSERTCMP(X, OP, Y) \ 861 do { \ 862 } while(0) 863 864 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 865 do { \ 866 } while(0) 867 868 #define ASSERTIF(C, X) \ 869 do { \ 870 } while(0) 871 872 #define ASSERTIFCMP(C, X, OP, Y) \ 873 do { \ 874 } while(0) 875 876 #endif /* __KDEBUGALL */ 877