3 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
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.
12 #include <linux/compiler.h>
13 #include <linux/kernel.h>
15 #include <linux/pagemap.h>
16 #include <linux/rxrpc.h>
17 #include <linux/key.h>
18 #include <linux/workqueue.h>
19 #include <linux/sched.h>
20 #include <linux/fscache.h>
21 #include <linux/backing-dev.h>
22 #include <net/af_rxrpc.h>
27 #define AFS_CELL_MAX_ADDRS 15
33 AFS_VL_NEW, /* new, uninitialised record */
34 AFS_VL_CREATING, /* creating record */
35 AFS_VL_VALID, /* record is pending */
36 AFS_VL_NO_VOLUME, /* no such volume available */
37 AFS_VL_UPDATING, /* update in progress */
38 AFS_VL_VOLUME_DELETED, /* volume was deleted */
39 AFS_VL_UNCERTAIN, /* uncertain state (update failed) */
40 } __attribute__((packed)) afs_vlocation_state_t;
42 struct afs_mount_params {
43 bool rwpath; /* T if the parent should be considered R/W */
44 bool force; /* T to force cell type */
45 bool autocell; /* T if set auto mount operation */
46 afs_voltype_t type; /* type of volume requested */
47 int volnamesz; /* size of volume name */
48 const char *volname; /* name of volume to mount */
49 struct afs_cell *cell; /* cell in which to find volume */
50 struct afs_volume *volume; /* volume record */
51 struct key *key; /* key to use for secure mounting */
55 * definition of how to wait for the completion of an operation
57 struct afs_wait_mode {
58 /* RxRPC received message notification */
59 rxrpc_notify_rx_t notify_rx;
61 /* synchronous call waiter and call dispatched notification */
62 int (*wait)(struct afs_call *call);
64 /* asynchronous call completion */
65 void (*async_complete)(void *reply, int error);
68 extern const struct afs_wait_mode afs_sync_call;
69 extern const struct afs_wait_mode afs_async_call;
72 * a record of an in-progress RxRPC call
75 const struct afs_call_type *type; /* type of call */
76 const struct afs_wait_mode *wait_mode; /* completion wait mode */
77 wait_queue_head_t waitq; /* processes awaiting completion */
78 struct work_struct async_work; /* asynchronous work processor */
79 struct work_struct work; /* actual work processor */
80 struct rxrpc_call *rxcall; /* RxRPC call handle */
81 struct key *key; /* security for this call */
82 struct afs_server *server; /* server affected by incoming CM call */
83 void *request; /* request data (first part) */
84 struct address_space *mapping; /* page set */
85 struct afs_writeback *wb; /* writeback being performed */
86 void *buffer; /* reply receive buffer */
87 void *reply; /* reply buffer (first part) */
88 void *reply2; /* reply buffer (second part) */
89 void *reply3; /* reply buffer (third part) */
90 void *reply4; /* reply buffer (fourth part) */
91 pgoff_t first; /* first page in mapping to deal with */
92 pgoff_t last; /* last page in mapping to deal with */
93 size_t offset; /* offset into received data store */
94 enum { /* call state */
95 AFS_CALL_REQUESTING, /* request is being sent for outgoing call */
96 AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */
97 AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */
98 AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */
99 AFS_CALL_REPLYING, /* replying to incoming call */
100 AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */
101 AFS_CALL_COMPLETE, /* Completed or failed */
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 last_to; /* amount of mapping[last] */
109 unsigned char unmarshall; /* unmarshalling phase */
110 bool incoming; /* T if incoming call */
111 bool send_pages; /* T if data from mapping should be sent */
112 bool need_attention; /* T if RxRPC poked us */
113 u16 service_id; /* RxRPC service ID to call */
114 __be16 port; /* target UDP port */
115 u32 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 */
121 struct afs_call_type {
124 /* deliver request or reply data to an call
125 * - returning an error will cause the call to be aborted
127 int (*deliver)(struct afs_call *call);
129 /* map an abort code to an error number */
130 int (*abort_to_error)(u32 abort_code);
132 /* clean up a call */
133 void (*destructor)(struct afs_call *call);
137 * record of an outstanding writeback on a vnode
139 struct afs_writeback {
140 struct list_head link; /* link in vnode->writebacks */
141 struct work_struct writer; /* work item to perform the writeback */
142 struct afs_vnode *vnode; /* vnode to which this write applies */
143 struct key *key; /* owner of this write */
144 wait_queue_head_t waitq; /* completion and ready wait queue */
145 pgoff_t first; /* first page in batch */
146 pgoff_t point; /* last page in current store op */
147 pgoff_t last; /* last page in batch (inclusive) */
148 unsigned offset_first; /* offset into first page of start of write */
149 unsigned to_last; /* offset into last page of end of write */
150 int num_conflicts; /* count of conflicting writes in list */
152 bool conflicts; /* T if has dependent conflicts */
154 AFS_WBACK_SYNCING, /* synchronisation being performed */
155 AFS_WBACK_PENDING, /* write pending */
156 AFS_WBACK_CONFLICTING, /* conflicting writes posted */
157 AFS_WBACK_WRITING, /* writing back */
158 AFS_WBACK_COMPLETE /* the writeback record has been unlinked */
159 } state __attribute__((packed));
163 * AFS superblock private data
164 * - there's one superblock per volume
166 struct afs_super_info {
167 struct afs_volume *volume; /* volume record */
168 char rwparent; /* T if parent is R/W AFS volume */
171 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
173 return sb->s_fs_info;
176 extern struct file_system_type afs_fs_type;
179 * entry in the cached cell catalogue
181 struct afs_cache_cell {
182 char name[AFS_MAXCELLNAME]; /* cell name (padded with NULs) */
183 struct in_addr vl_servers[15]; /* cached cell VL servers */
191 struct list_head link; /* main cell list link */
192 struct key *anonymous_key; /* anonymous user key for this cell */
193 struct list_head proc_link; /* /proc cell list link */
194 #ifdef CONFIG_AFS_FSCACHE
195 struct fscache_cookie *cache; /* caching cookie */
198 /* server record management */
199 rwlock_t servers_lock; /* active server list lock */
200 struct list_head servers; /* active server list */
202 /* volume location record management */
203 struct rw_semaphore vl_sem; /* volume management serialisation semaphore */
204 struct list_head vl_list; /* cell's active VL record list */
205 spinlock_t vl_lock; /* vl_list lock */
206 unsigned short vl_naddrs; /* number of VL servers in addr list */
207 unsigned short vl_curr_svix; /* current server index */
208 struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */
210 char name[0]; /* cell name - must go last */
214 * entry in the cached volume location catalogue
216 struct afs_cache_vlocation {
217 /* volume name (lowercase, padded with NULs) */
218 uint8_t name[AFS_MAXVOLNAME + 1];
220 uint8_t nservers; /* number of entries used in servers[] */
221 uint8_t vidmask; /* voltype mask for vid[] */
222 uint8_t srvtmask[8]; /* voltype masks for servers[] */
223 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */
224 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */
225 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */
227 afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */
228 struct in_addr servers[8]; /* fileserver addresses */
229 time_t rtime; /* last retrieval time */
233 * volume -> vnode hash table entry
235 struct afs_cache_vhash {
236 afs_voltype_t vtype; /* which volume variation */
237 uint8_t hash_bucket; /* which hash bucket this represents */
238 } __attribute__((packed));
241 * AFS volume location record
243 struct afs_vlocation {
245 time_t time_of_death; /* time at which put reduced usage to 0 */
246 struct list_head link; /* link in cell volume location list */
247 struct list_head grave; /* link in master graveyard list */
248 struct list_head update; /* link in master update list */
249 struct afs_cell *cell; /* cell to which volume belongs */
250 #ifdef CONFIG_AFS_FSCACHE
251 struct fscache_cookie *cache; /* caching cookie */
253 struct afs_cache_vlocation vldb; /* volume information DB record */
254 struct afs_volume *vols[3]; /* volume access record pointer (index by type) */
255 wait_queue_head_t waitq; /* status change waitqueue */
256 time_t update_at; /* time at which record should be updated */
257 spinlock_t lock; /* access lock */
258 afs_vlocation_state_t state; /* volume location state */
259 unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */
260 unsigned short upd_busy_cnt; /* EBUSY count during update */
261 bool valid; /* T if valid */
265 * AFS fileserver record
269 time_t time_of_death; /* time at which put reduced usage to 0 */
270 struct in_addr addr; /* server address */
271 struct afs_cell *cell; /* cell in which server resides */
272 struct list_head link; /* link in cell's server list */
273 struct list_head grave; /* link in master graveyard list */
274 struct rb_node master_rb; /* link in master by-addr tree */
275 struct rw_semaphore sem; /* access lock */
277 /* file service access */
278 struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */
279 unsigned long fs_act_jif; /* time at which last activity occurred */
280 unsigned long fs_dead_jif; /* time at which no longer to be considered dead */
281 spinlock_t fs_lock; /* access lock */
282 int fs_state; /* 0 or reason FS currently marked dead (-errno) */
284 /* callback promise management */
285 struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */
286 struct delayed_work cb_updater; /* callback updater */
287 struct delayed_work cb_break_work; /* collected break dispatcher */
288 wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */
289 spinlock_t cb_lock; /* access lock */
290 struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */
291 atomic_t cb_break_n; /* number of pending breaks */
292 u8 cb_break_head; /* head of callback breaking ring */
293 u8 cb_break_tail; /* tail of callback breaking ring */
297 * AFS volume access record
301 struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */
302 struct afs_vlocation *vlocation; /* volume location */
303 #ifdef CONFIG_AFS_FSCACHE
304 struct fscache_cookie *cache; /* caching cookie */
306 afs_volid_t vid; /* volume ID */
307 afs_voltype_t type; /* type of volume */
308 char type_force; /* force volume type (suppress R/O -> R/W) */
309 unsigned short nservers; /* number of server slots filled */
310 unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */
311 struct afs_server *servers[8]; /* servers on which volume resides (ordered) */
312 struct rw_semaphore server_sem; /* lock for accessing current server */
313 struct backing_dev_info bdi;
317 * vnode catalogue entry
319 struct afs_cache_vnode {
320 afs_vnodeid_t vnode_id; /* vnode ID */
321 unsigned vnode_unique; /* vnode ID uniquifier */
322 afs_dataversion_t data_version; /* data version */
326 * AFS inode private data
329 struct inode vfs_inode; /* the VFS's inode record */
331 struct afs_volume *volume; /* volume on which vnode resides */
332 struct afs_server *server; /* server currently supplying this file */
333 struct afs_fid fid; /* the file identifier for this inode */
334 struct afs_file_status status; /* AFS status info for this file */
335 #ifdef CONFIG_AFS_FSCACHE
336 struct fscache_cookie *cache; /* caching cookie */
338 struct afs_permits *permits; /* cache of permits so far obtained */
339 struct mutex permits_lock; /* lock for altering permits list */
340 struct mutex validate_lock; /* lock for validating this vnode */
341 wait_queue_head_t update_waitq; /* status fetch waitqueue */
342 int update_cnt; /* number of outstanding ops that will update the
344 spinlock_t writeback_lock; /* lock for writebacks */
345 spinlock_t lock; /* waitqueue/flags lock */
347 #define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */
348 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */
349 #define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */
350 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */
351 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */
352 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */
353 #define AFS_VNODE_LOCKING 6 /* set if waiting for lock on vnode */
354 #define AFS_VNODE_READLOCKED 7 /* set if vnode is read-locked on the server */
355 #define AFS_VNODE_WRITELOCKED 8 /* set if vnode is write-locked on the server */
356 #define AFS_VNODE_UNLOCKING 9 /* set if vnode is being unlocked on the server */
357 #define AFS_VNODE_AUTOCELL 10 /* set if Vnode is an auto mount point */
358 #define AFS_VNODE_PSEUDODIR 11 /* set if Vnode is a pseudo directory */
360 long acl_order; /* ACL check count (callback break count) */
362 struct list_head writebacks; /* alterations in pagecache that need writing */
363 struct list_head pending_locks; /* locks waiting to be granted */
364 struct list_head granted_locks; /* locks granted on this file */
365 struct delayed_work lock_work; /* work to be done in locking */
366 struct key *unlock_key; /* key to be used in unlocking */
368 /* outstanding callback notification on this file */
369 struct rb_node server_rb; /* link in server->fs_vnodes */
370 struct rb_node cb_promise; /* link in server->cb_promises */
371 struct work_struct cb_broken_work; /* work to be done on callback break */
372 time_t cb_expires; /* time at which callback expires */
373 time_t cb_expires_at; /* time used to order cb_promise */
374 unsigned cb_version; /* callback version */
375 unsigned cb_expiry; /* callback expiry time */
376 afs_callback_type_t cb_type; /* type of callback */
377 bool cb_promised; /* true if promise still holds */
381 * cached security record for one user's attempt to access a vnode
384 struct key *key; /* RxRPC ticket holding a security context */
385 afs_access_t access_mask; /* access mask for this key */
389 * cache of security records from attempts to access a vnode
392 struct rcu_head rcu; /* disposal procedure */
393 int count; /* number of records */
394 struct afs_permit permits[0]; /* the permits so far examined */
398 * record of one of a system's set of network interfaces
400 struct afs_interface {
401 struct in_addr address; /* IPv4 address bound to interface */
402 struct in_addr netmask; /* netmask applied to address */
403 unsigned mtu; /* MTU of interface */
407 * UUID definition [internet draft]
408 * - the timestamp is a 60-bit value, split 32/16/12, and goes in 100ns
409 * increments since midnight 15th October 1582
410 * - add AFS_UUID_TO_UNIX_TIME to convert unix time in 100ns units to UUID
412 * - the clock sequence is a 14-bit counter to avoid duplicate times
415 u32 time_low; /* low part of timestamp */
416 u16 time_mid; /* mid part of timestamp */
417 u16 time_hi_and_version; /* high part of timestamp and version */
418 #define AFS_UUID_TO_UNIX_TIME 0x01b21dd213814000ULL
419 #define AFS_UUID_TIMEHI_MASK 0x0fff
420 #define AFS_UUID_VERSION_TIME 0x1000 /* time-based UUID */
421 #define AFS_UUID_VERSION_NAME 0x3000 /* name-based UUID */
422 #define AFS_UUID_VERSION_RANDOM 0x4000 /* (pseudo-)random generated UUID */
423 u8 clock_seq_hi_and_reserved; /* clock seq hi and variant */
424 #define AFS_UUID_CLOCKHI_MASK 0x3f
425 #define AFS_UUID_VARIANT_STD 0x80
426 u8 clock_seq_low; /* clock seq low */
427 u8 node[6]; /* spatially unique node ID (MAC addr) */
430 /*****************************************************************************/
434 #ifdef CONFIG_AFS_FSCACHE
435 extern struct fscache_netfs afs_cache_netfs;
436 extern struct fscache_cookie_def afs_cell_cache_index_def;
437 extern struct fscache_cookie_def afs_vlocation_cache_index_def;
438 extern struct fscache_cookie_def afs_volume_cache_index_def;
439 extern struct fscache_cookie_def afs_vnode_cache_index_def;
441 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL)
442 #define afs_vlocation_cache_index_def (*(struct fscache_cookie_def *) NULL)
443 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL)
444 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL)
450 extern void afs_init_callback_state(struct afs_server *);
451 extern void afs_broken_callback_work(struct work_struct *);
452 extern void afs_break_callbacks(struct afs_server *, size_t,
453 struct afs_callback[]);
454 extern void afs_discard_callback_on_delete(struct afs_vnode *);
455 extern void afs_give_up_callback(struct afs_vnode *);
456 extern void afs_dispatch_give_up_callbacks(struct work_struct *);
457 extern void afs_flush_callback_breaks(struct afs_server *);
458 extern int __init afs_callback_update_init(void);
459 extern void afs_callback_update_kill(void);
464 extern struct rw_semaphore afs_proc_cells_sem;
465 extern struct list_head afs_proc_cells;
467 #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0)
468 extern int afs_cell_init(char *);
469 extern struct afs_cell *afs_cell_create(const char *, unsigned, char *, bool);
470 extern struct afs_cell *afs_cell_lookup(const char *, unsigned, bool);
471 extern struct afs_cell *afs_grab_cell(struct afs_cell *);
472 extern void afs_put_cell(struct afs_cell *);
473 extern void afs_cell_purge(void);
478 extern bool afs_cm_incoming_call(struct afs_call *);
483 extern const struct inode_operations afs_dir_inode_operations;
484 extern const struct dentry_operations afs_fs_dentry_operations;
485 extern const struct file_operations afs_dir_file_operations;
490 extern const struct address_space_operations afs_fs_aops;
491 extern const struct inode_operations afs_file_inode_operations;
492 extern const struct file_operations afs_file_operations;
494 extern int afs_open(struct inode *, struct file *);
495 extern int afs_release(struct inode *, struct file *);
496 extern int afs_page_filler(void *, struct page *);
501 extern void __exit afs_kill_lock_manager(void);
502 extern void afs_lock_work(struct work_struct *);
503 extern void afs_lock_may_be_available(struct afs_vnode *);
504 extern int afs_lock(struct file *, int, struct file_lock *);
505 extern int afs_flock(struct file *, int, struct file_lock *);
510 extern int afs_fs_fetch_file_status(struct afs_server *, struct key *,
511 struct afs_vnode *, struct afs_volsync *,
512 const struct afs_wait_mode *);
513 extern int afs_fs_give_up_callbacks(struct afs_server *,
514 const struct afs_wait_mode *);
515 extern int afs_fs_fetch_data(struct afs_server *, struct key *,
516 struct afs_vnode *, off_t, size_t, struct page *,
517 const struct afs_wait_mode *);
518 extern int afs_fs_create(struct afs_server *, struct key *,
519 struct afs_vnode *, const char *, umode_t,
520 struct afs_fid *, struct afs_file_status *,
521 struct afs_callback *,
522 const struct afs_wait_mode *);
523 extern int afs_fs_remove(struct afs_server *, struct key *,
524 struct afs_vnode *, const char *, bool,
525 const struct afs_wait_mode *);
526 extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *,
527 struct afs_vnode *, const char *,
528 const struct afs_wait_mode *);
529 extern int afs_fs_symlink(struct afs_server *, struct key *,
530 struct afs_vnode *, const char *, const char *,
531 struct afs_fid *, struct afs_file_status *,
532 const struct afs_wait_mode *);
533 extern int afs_fs_rename(struct afs_server *, struct key *,
534 struct afs_vnode *, const char *,
535 struct afs_vnode *, const char *,
536 const struct afs_wait_mode *);
537 extern int afs_fs_store_data(struct afs_server *, struct afs_writeback *,
538 pgoff_t, pgoff_t, unsigned, unsigned,
539 const struct afs_wait_mode *);
540 extern int afs_fs_setattr(struct afs_server *, struct key *,
541 struct afs_vnode *, struct iattr *,
542 const struct afs_wait_mode *);
543 extern int afs_fs_get_volume_status(struct afs_server *, struct key *,
545 struct afs_volume_status *,
546 const struct afs_wait_mode *);
547 extern int afs_fs_set_lock(struct afs_server *, struct key *,
548 struct afs_vnode *, afs_lock_type_t,
549 const struct afs_wait_mode *);
550 extern int afs_fs_extend_lock(struct afs_server *, struct key *,
552 const struct afs_wait_mode *);
553 extern int afs_fs_release_lock(struct afs_server *, struct key *,
555 const struct afs_wait_mode *);
560 extern struct inode *afs_iget_autocell(struct inode *, const char *, int,
562 extern struct inode *afs_iget(struct super_block *, struct key *,
563 struct afs_fid *, struct afs_file_status *,
564 struct afs_callback *);
565 extern void afs_zap_data(struct afs_vnode *);
566 extern int afs_validate(struct afs_vnode *, struct key *);
567 extern int afs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
568 extern int afs_setattr(struct dentry *, struct iattr *);
569 extern void afs_evict_inode(struct inode *);
570 extern int afs_drop_inode(struct inode *);
575 extern struct workqueue_struct *afs_wq;
576 extern struct afs_uuid afs_uuid;
581 extern int afs_abort_to_error(u32);
586 extern const struct inode_operations afs_mntpt_inode_operations;
587 extern const struct inode_operations afs_autocell_inode_operations;
588 extern const struct file_operations afs_mntpt_file_operations;
590 extern struct vfsmount *afs_d_automount(struct path *);
591 extern int afs_mntpt_check_symlink(struct afs_vnode *, struct key *);
592 extern void afs_mntpt_kill_timer(void);
597 extern int afs_proc_init(void);
598 extern void afs_proc_cleanup(void);
599 extern int afs_proc_cell_setup(struct afs_cell *);
600 extern void afs_proc_cell_remove(struct afs_cell *);
605 extern struct socket *afs_socket;
607 extern int afs_open_socket(void);
608 extern void afs_close_socket(void);
609 extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t,
610 const struct afs_wait_mode *);
611 extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *,
613 extern void afs_flat_call_destructor(struct afs_call *);
614 extern void afs_send_empty_reply(struct afs_call *);
615 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
616 extern int afs_extract_data(struct afs_call *, void *, size_t, bool);
618 static inline int afs_transfer_reply(struct afs_call *call)
620 return afs_extract_data(call, call->buffer, call->reply_max, false);
626 extern void afs_clear_permits(struct afs_vnode *);
627 extern void afs_cache_permit(struct afs_vnode *, struct key *, long);
628 extern void afs_zap_permits(struct rcu_head *);
629 extern struct key *afs_request_key(struct afs_cell *);
630 extern int afs_permission(struct inode *, int);
635 extern spinlock_t afs_server_peer_lock;
637 #define afs_get_server(S) \
639 _debug("GET SERVER %d", atomic_read(&(S)->usage)); \
640 atomic_inc(&(S)->usage); \
643 extern struct afs_server *afs_lookup_server(struct afs_cell *,
644 const struct in_addr *);
645 extern struct afs_server *afs_find_server(const struct sockaddr_rxrpc *);
646 extern void afs_put_server(struct afs_server *);
647 extern void __exit afs_purge_servers(void);
652 extern int afs_fs_init(void);
653 extern void afs_fs_exit(void);
658 extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool);
659 extern int afs_get_MAC_address(u8 *, size_t);
664 extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *,
665 const char *, struct afs_cache_vlocation *,
666 const struct afs_wait_mode *);
667 extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *,
668 afs_volid_t, afs_voltype_t,
669 struct afs_cache_vlocation *,
670 const struct afs_wait_mode *);
675 #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0)
677 extern int __init afs_vlocation_update_init(void);
678 extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *,
680 const char *, size_t);
681 extern void afs_put_vlocation(struct afs_vlocation *);
682 extern void afs_vlocation_purge(void);
687 static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
689 return container_of(inode, struct afs_vnode, vfs_inode);
692 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
694 return &vnode->vfs_inode;
697 extern void afs_vnode_finalise_status_update(struct afs_vnode *,
698 struct afs_server *);
699 extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *,
701 extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *,
702 off_t, size_t, struct page *);
703 extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *,
704 umode_t, struct afs_fid *, struct afs_file_status *,
705 struct afs_callback *, struct afs_server **);
706 extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *,
708 extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *,
710 extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *,
711 const char *, struct afs_fid *,
712 struct afs_file_status *, struct afs_server **);
713 extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *,
714 struct key *, const char *, const char *);
715 extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t,
717 extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *);
718 extern int afs_vnode_get_volume_status(struct afs_vnode *, struct key *,
719 struct afs_volume_status *);
720 extern int afs_vnode_set_lock(struct afs_vnode *, struct key *,
722 extern int afs_vnode_extend_lock(struct afs_vnode *, struct key *);
723 extern int afs_vnode_release_lock(struct afs_vnode *, struct key *);
728 #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0)
730 extern void afs_put_volume(struct afs_volume *);
731 extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *);
732 extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *);
733 extern int afs_volume_release_fileserver(struct afs_vnode *,
734 struct afs_server *, int);
739 extern int afs_set_page_dirty(struct page *);
740 extern void afs_put_writeback(struct afs_writeback *);
741 extern int afs_write_begin(struct file *file, struct address_space *mapping,
742 loff_t pos, unsigned len, unsigned flags,
743 struct page **pagep, void **fsdata);
744 extern int afs_write_end(struct file *file, struct address_space *mapping,
745 loff_t pos, unsigned len, unsigned copied,
746 struct page *page, void *fsdata);
747 extern int afs_writepage(struct page *, struct writeback_control *);
748 extern int afs_writepages(struct address_space *, struct writeback_control *);
749 extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *);
750 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *);
751 extern int afs_writeback_all(struct afs_vnode *);
752 extern int afs_fsync(struct file *, loff_t, loff_t, int);
755 /*****************************************************************************/
759 extern unsigned afs_debug;
761 #define dbgprintk(FMT,...) \
762 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
764 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
765 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
766 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
769 #if defined(__KDEBUG)
770 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
771 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
772 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
774 #elif defined(CONFIG_AFS_DEBUG)
775 #define AFS_DEBUG_KENTER 0x01
776 #define AFS_DEBUG_KLEAVE 0x02
777 #define AFS_DEBUG_KDEBUG 0x04
779 #define _enter(FMT,...) \
781 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
782 kenter(FMT,##__VA_ARGS__); \
785 #define _leave(FMT,...) \
787 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
788 kleave(FMT,##__VA_ARGS__); \
791 #define _debug(FMT,...) \
793 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
794 kdebug(FMT,##__VA_ARGS__); \
798 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
799 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
800 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
804 * debug assertion checking
806 #if 1 // defined(__KDEBUGALL)
810 if (unlikely(!(X))) { \
811 printk(KERN_ERR "\n"); \
812 printk(KERN_ERR "AFS: Assertion failed\n"); \
817 #define ASSERTCMP(X, OP, Y) \
819 if (unlikely(!((X) OP (Y)))) { \
820 printk(KERN_ERR "\n"); \
821 printk(KERN_ERR "AFS: Assertion failed\n"); \
822 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
823 (unsigned long)(X), (unsigned long)(Y)); \
824 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
825 (unsigned long)(X), (unsigned long)(Y)); \
830 #define ASSERTRANGE(L, OP1, N, OP2, H) \
832 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \
833 printk(KERN_ERR "\n"); \
834 printk(KERN_ERR "AFS: Assertion failed\n"); \
835 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \
836 (unsigned long)(L), (unsigned long)(N), \
837 (unsigned long)(H)); \
838 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
839 (unsigned long)(L), (unsigned long)(N), \
840 (unsigned long)(H)); \
845 #define ASSERTIF(C, X) \
847 if (unlikely((C) && !(X))) { \
848 printk(KERN_ERR "\n"); \
849 printk(KERN_ERR "AFS: Assertion failed\n"); \
854 #define ASSERTIFCMP(C, X, OP, Y) \
856 if (unlikely((C) && !((X) OP (Y)))) { \
857 printk(KERN_ERR "\n"); \
858 printk(KERN_ERR "AFS: Assertion failed\n"); \
859 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
860 (unsigned long)(X), (unsigned long)(Y)); \
861 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
862 (unsigned long)(X), (unsigned long)(Y)); \
873 #define ASSERTCMP(X, OP, Y) \
877 #define ASSERTRANGE(L, OP1, N, OP2, H) \
881 #define ASSERTIF(C, X) \
885 #define ASSERTIFCMP(C, X, OP, Y) \
889 #endif /* __KDEBUGALL */