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 <linux/uuid.h>
23 #include <net/af_rxrpc.h>
28 #define AFS_CELL_MAX_ADDRS 15
34 AFS_VL_NEW
, /* new, uninitialised record */
35 AFS_VL_CREATING
, /* creating record */
36 AFS_VL_VALID
, /* record is pending */
37 AFS_VL_NO_VOLUME
, /* no such volume available */
38 AFS_VL_UPDATING
, /* update in progress */
39 AFS_VL_VOLUME_DELETED
, /* volume was deleted */
40 AFS_VL_UNCERTAIN
, /* uncertain state (update failed) */
41 } __attribute__((packed
)) afs_vlocation_state_t
;
43 struct afs_mount_params
{
44 bool rwpath
; /* T if the parent should be considered R/W */
45 bool force
; /* T to force cell type */
46 bool autocell
; /* T if set auto mount operation */
47 afs_voltype_t type
; /* type of volume requested */
48 int volnamesz
; /* size of volume name */
49 const char *volname
; /* name of volume to mount */
50 struct afs_cell
*cell
; /* cell in which to find volume */
51 struct afs_volume
*volume
; /* volume record */
52 struct key
*key
; /* key to use for secure mounting */
56 AFS_CALL_REQUESTING
, /* request is being sent for outgoing call */
57 AFS_CALL_AWAIT_REPLY
, /* awaiting reply to outgoing call */
58 AFS_CALL_AWAIT_OP_ID
, /* awaiting op ID on incoming call */
59 AFS_CALL_AWAIT_REQUEST
, /* awaiting request data on incoming call */
60 AFS_CALL_REPLYING
, /* replying to incoming call */
61 AFS_CALL_AWAIT_ACK
, /* awaiting final ACK of incoming call */
62 AFS_CALL_COMPLETE
, /* Completed or failed */
65 * a record of an in-progress RxRPC call
68 const struct afs_call_type
*type
; /* type of call */
69 wait_queue_head_t waitq
; /* processes awaiting completion */
70 struct work_struct async_work
; /* async I/O processor */
71 struct work_struct work
; /* actual work processor */
72 struct rxrpc_call
*rxcall
; /* RxRPC call handle */
73 struct key
*key
; /* security for this call */
74 struct afs_server
*server
; /* server affected by incoming CM call */
75 void *request
; /* request data (first part) */
76 struct address_space
*mapping
; /* page set */
77 struct afs_writeback
*wb
; /* writeback being performed */
78 void *buffer
; /* reply receive buffer */
79 void *reply
; /* reply buffer (first part) */
80 void *reply2
; /* reply buffer (second part) */
81 void *reply3
; /* reply buffer (third part) */
82 void *reply4
; /* reply buffer (fourth part) */
83 pgoff_t first
; /* first page in mapping to deal with */
84 pgoff_t last
; /* last page in mapping to deal with */
85 size_t offset
; /* offset into received data store */
87 enum afs_call_state state
;
88 int error
; /* error code */
89 u32 abort_code
; /* Remote abort ID or 0 */
90 unsigned request_size
; /* size of request data */
91 unsigned reply_max
; /* maximum size of reply */
92 unsigned first_offset
; /* offset into mapping[first] */
93 unsigned last_to
; /* amount of mapping[last] */
94 unsigned char unmarshall
; /* unmarshalling phase */
95 bool incoming
; /* T if incoming call */
96 bool send_pages
; /* T if data from mapping should be sent */
97 bool need_attention
; /* T if RxRPC poked us */
98 bool async
; /* T if asynchronous */
99 u16 service_id
; /* RxRPC service ID to call */
100 __be16 port
; /* target UDP port */
101 u32 operation_ID
; /* operation ID for an incoming call */
102 u32 count
; /* count for use in unmarshalling */
103 __be32 tmp
; /* place to extract temporary data */
104 afs_dataversion_t store_version
; /* updated version expected from store */
107 struct afs_call_type
{
110 /* deliver request or reply data to an call
111 * - returning an error will cause the call to be aborted
113 int (*deliver
)(struct afs_call
*call
);
115 /* map an abort code to an error number */
116 int (*abort_to_error
)(u32 abort_code
);
118 /* clean up a call */
119 void (*destructor
)(struct afs_call
*call
);
122 void (*work
)(struct work_struct
*work
);
126 * Record of an outstanding read operation on a vnode.
129 loff_t pos
; /* Where to start reading */
130 loff_t len
; /* How much to read */
131 loff_t actual_len
; /* How much we're actually getting */
133 unsigned int remain
; /* Amount remaining */
134 unsigned int index
; /* Which page we're reading into */
135 unsigned int pg_offset
; /* Offset in page we're at */
136 unsigned int nr_pages
;
137 void (*page_done
)(struct afs_call
*, struct afs_read
*);
138 struct page
*pages
[];
142 * record of an outstanding writeback on a vnode
144 struct afs_writeback
{
145 struct list_head link
; /* link in vnode->writebacks */
146 struct work_struct writer
; /* work item to perform the writeback */
147 struct afs_vnode
*vnode
; /* vnode to which this write applies */
148 struct key
*key
; /* owner of this write */
149 wait_queue_head_t waitq
; /* completion and ready wait queue */
150 pgoff_t first
; /* first page in batch */
151 pgoff_t point
; /* last page in current store op */
152 pgoff_t last
; /* last page in batch (inclusive) */
153 unsigned offset_first
; /* offset into first page of start of write */
154 unsigned to_last
; /* offset into last page of end of write */
155 int num_conflicts
; /* count of conflicting writes in list */
157 bool conflicts
; /* T if has dependent conflicts */
159 AFS_WBACK_SYNCING
, /* synchronisation being performed */
160 AFS_WBACK_PENDING
, /* write pending */
161 AFS_WBACK_CONFLICTING
, /* conflicting writes posted */
162 AFS_WBACK_WRITING
, /* writing back */
163 AFS_WBACK_COMPLETE
/* the writeback record has been unlinked */
164 } state
__attribute__((packed
));
168 * AFS superblock private data
169 * - there's one superblock per volume
171 struct afs_super_info
{
172 struct afs_volume
*volume
; /* volume record */
173 char rwparent
; /* T if parent is R/W AFS volume */
176 static inline struct afs_super_info
*AFS_FS_S(struct super_block
*sb
)
178 return sb
->s_fs_info
;
181 extern struct file_system_type afs_fs_type
;
184 * entry in the cached cell catalogue
186 struct afs_cache_cell
{
187 char name
[AFS_MAXCELLNAME
]; /* cell name (padded with NULs) */
188 struct in_addr vl_servers
[15]; /* cached cell VL servers */
196 struct list_head link
; /* main cell list link */
197 struct key
*anonymous_key
; /* anonymous user key for this cell */
198 struct list_head proc_link
; /* /proc cell list link */
199 #ifdef CONFIG_AFS_FSCACHE
200 struct fscache_cookie
*cache
; /* caching cookie */
203 /* server record management */
204 rwlock_t servers_lock
; /* active server list lock */
205 struct list_head servers
; /* active server list */
207 /* volume location record management */
208 struct rw_semaphore vl_sem
; /* volume management serialisation semaphore */
209 struct list_head vl_list
; /* cell's active VL record list */
210 spinlock_t vl_lock
; /* vl_list lock */
211 unsigned short vl_naddrs
; /* number of VL servers in addr list */
212 unsigned short vl_curr_svix
; /* current server index */
213 struct in_addr vl_addrs
[AFS_CELL_MAX_ADDRS
]; /* cell VL server addresses */
215 char name
[0]; /* cell name - must go last */
219 * entry in the cached volume location catalogue
221 struct afs_cache_vlocation
{
222 /* volume name (lowercase, padded with NULs) */
223 uint8_t name
[AFS_MAXVOLNAME
+ 1];
225 uint8_t nservers
; /* number of entries used in servers[] */
226 uint8_t vidmask
; /* voltype mask for vid[] */
227 uint8_t srvtmask
[8]; /* voltype masks for servers[] */
228 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */
229 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */
230 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */
232 afs_volid_t vid
[3]; /* volume IDs for R/W, R/O and Bak volumes */
233 struct in_addr servers
[8]; /* fileserver addresses */
234 time_t rtime
; /* last retrieval time */
238 * volume -> vnode hash table entry
240 struct afs_cache_vhash
{
241 afs_voltype_t vtype
; /* which volume variation */
242 uint8_t hash_bucket
; /* which hash bucket this represents */
243 } __attribute__((packed
));
246 * AFS volume location record
248 struct afs_vlocation
{
250 time_t time_of_death
; /* time at which put reduced usage to 0 */
251 struct list_head link
; /* link in cell volume location list */
252 struct list_head grave
; /* link in master graveyard list */
253 struct list_head update
; /* link in master update list */
254 struct afs_cell
*cell
; /* cell to which volume belongs */
255 #ifdef CONFIG_AFS_FSCACHE
256 struct fscache_cookie
*cache
; /* caching cookie */
258 struct afs_cache_vlocation vldb
; /* volume information DB record */
259 struct afs_volume
*vols
[3]; /* volume access record pointer (index by type) */
260 wait_queue_head_t waitq
; /* status change waitqueue */
261 time_t update_at
; /* time at which record should be updated */
262 spinlock_t lock
; /* access lock */
263 afs_vlocation_state_t state
; /* volume location state */
264 unsigned short upd_rej_cnt
; /* ENOMEDIUM count during update */
265 unsigned short upd_busy_cnt
; /* EBUSY count during update */
266 bool valid
; /* T if valid */
270 * AFS fileserver record
274 time_t time_of_death
; /* time at which put reduced usage to 0 */
275 struct in_addr addr
; /* server address */
276 struct afs_cell
*cell
; /* cell in which server resides */
277 struct list_head link
; /* link in cell's server list */
278 struct list_head grave
; /* link in master graveyard list */
279 struct rb_node master_rb
; /* link in master by-addr tree */
280 struct rw_semaphore sem
; /* access lock */
282 /* file service access */
283 struct rb_root fs_vnodes
; /* vnodes backed by this server (ordered by FID) */
284 unsigned long fs_act_jif
; /* time at which last activity occurred */
285 unsigned long fs_dead_jif
; /* time at which no longer to be considered dead */
286 spinlock_t fs_lock
; /* access lock */
287 int fs_state
; /* 0 or reason FS currently marked dead (-errno) */
289 /* callback promise management */
290 struct rb_root cb_promises
; /* vnode expiration list (ordered earliest first) */
291 struct delayed_work cb_updater
; /* callback updater */
292 struct delayed_work cb_break_work
; /* collected break dispatcher */
293 wait_queue_head_t cb_break_waitq
; /* space available in cb_break waitqueue */
294 spinlock_t cb_lock
; /* access lock */
295 struct afs_callback cb_break
[64]; /* ring of callbacks awaiting breaking */
296 atomic_t cb_break_n
; /* number of pending breaks */
297 u8 cb_break_head
; /* head of callback breaking ring */
298 u8 cb_break_tail
; /* tail of callback breaking ring */
302 * AFS volume access record
306 struct afs_cell
*cell
; /* cell to which belongs (unrefd ptr) */
307 struct afs_vlocation
*vlocation
; /* volume location */
308 #ifdef CONFIG_AFS_FSCACHE
309 struct fscache_cookie
*cache
; /* caching cookie */
311 afs_volid_t vid
; /* volume ID */
312 afs_voltype_t type
; /* type of volume */
313 char type_force
; /* force volume type (suppress R/O -> R/W) */
314 unsigned short nservers
; /* number of server slots filled */
315 unsigned short rjservers
; /* number of servers discarded due to -ENOMEDIUM */
316 struct afs_server
*servers
[8]; /* servers on which volume resides (ordered) */
317 struct rw_semaphore server_sem
; /* lock for accessing current server */
318 struct backing_dev_info bdi
;
322 * vnode catalogue entry
324 struct afs_cache_vnode
{
325 afs_vnodeid_t vnode_id
; /* vnode ID */
326 unsigned vnode_unique
; /* vnode ID uniquifier */
327 afs_dataversion_t data_version
; /* data version */
331 * AFS inode private data
334 struct inode vfs_inode
; /* the VFS's inode record */
336 struct afs_volume
*volume
; /* volume on which vnode resides */
337 struct afs_server
*server
; /* server currently supplying this file */
338 struct afs_fid fid
; /* the file identifier for this inode */
339 struct afs_file_status status
; /* AFS status info for this file */
340 #ifdef CONFIG_AFS_FSCACHE
341 struct fscache_cookie
*cache
; /* caching cookie */
343 struct afs_permits
*permits
; /* cache of permits so far obtained */
344 struct mutex permits_lock
; /* lock for altering permits list */
345 struct mutex validate_lock
; /* lock for validating this vnode */
346 wait_queue_head_t update_waitq
; /* status fetch waitqueue */
347 int update_cnt
; /* number of outstanding ops that will update the
349 spinlock_t writeback_lock
; /* lock for writebacks */
350 spinlock_t lock
; /* waitqueue/flags lock */
352 #define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */
353 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */
354 #define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */
355 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */
356 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */
357 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */
358 #define AFS_VNODE_LOCKING 6 /* set if waiting for lock on vnode */
359 #define AFS_VNODE_READLOCKED 7 /* set if vnode is read-locked on the server */
360 #define AFS_VNODE_WRITELOCKED 8 /* set if vnode is write-locked on the server */
361 #define AFS_VNODE_UNLOCKING 9 /* set if vnode is being unlocked on the server */
362 #define AFS_VNODE_AUTOCELL 10 /* set if Vnode is an auto mount point */
363 #define AFS_VNODE_PSEUDODIR 11 /* set if Vnode is a pseudo directory */
365 long acl_order
; /* ACL check count (callback break count) */
367 struct list_head writebacks
; /* alterations in pagecache that need writing */
368 struct list_head pending_locks
; /* locks waiting to be granted */
369 struct list_head granted_locks
; /* locks granted on this file */
370 struct delayed_work lock_work
; /* work to be done in locking */
371 struct key
*unlock_key
; /* key to be used in unlocking */
373 /* outstanding callback notification on this file */
374 struct rb_node server_rb
; /* link in server->fs_vnodes */
375 struct rb_node cb_promise
; /* link in server->cb_promises */
376 struct work_struct cb_broken_work
; /* work to be done on callback break */
377 time_t cb_expires
; /* time at which callback expires */
378 time_t cb_expires_at
; /* time used to order cb_promise */
379 unsigned cb_version
; /* callback version */
380 unsigned cb_expiry
; /* callback expiry time */
381 afs_callback_type_t cb_type
; /* type of callback */
382 bool cb_promised
; /* true if promise still holds */
386 * cached security record for one user's attempt to access a vnode
389 struct key
*key
; /* RxRPC ticket holding a security context */
390 afs_access_t access_mask
; /* access mask for this key */
394 * cache of security records from attempts to access a vnode
397 struct rcu_head rcu
; /* disposal procedure */
398 int count
; /* number of records */
399 struct afs_permit permits
[0]; /* the permits so far examined */
403 * record of one of a system's set of network interfaces
405 struct afs_interface
{
406 struct in_addr address
; /* IPv4 address bound to interface */
407 struct in_addr netmask
; /* netmask applied to address */
408 unsigned mtu
; /* MTU of interface */
411 /*****************************************************************************/
415 #ifdef CONFIG_AFS_FSCACHE
416 extern struct fscache_netfs afs_cache_netfs
;
417 extern struct fscache_cookie_def afs_cell_cache_index_def
;
418 extern struct fscache_cookie_def afs_vlocation_cache_index_def
;
419 extern struct fscache_cookie_def afs_volume_cache_index_def
;
420 extern struct fscache_cookie_def afs_vnode_cache_index_def
;
422 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL)
423 #define afs_vlocation_cache_index_def (*(struct fscache_cookie_def *) NULL)
424 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL)
425 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL)
431 extern void afs_init_callback_state(struct afs_server
*);
432 extern void afs_broken_callback_work(struct work_struct
*);
433 extern void afs_break_callbacks(struct afs_server
*, size_t,
434 struct afs_callback
[]);
435 extern void afs_discard_callback_on_delete(struct afs_vnode
*);
436 extern void afs_give_up_callback(struct afs_vnode
*);
437 extern void afs_dispatch_give_up_callbacks(struct work_struct
*);
438 extern void afs_flush_callback_breaks(struct afs_server
*);
439 extern int __init
afs_callback_update_init(void);
440 extern void afs_callback_update_kill(void);
445 extern struct rw_semaphore afs_proc_cells_sem
;
446 extern struct list_head afs_proc_cells
;
448 #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0)
449 extern int afs_cell_init(char *);
450 extern struct afs_cell
*afs_cell_create(const char *, unsigned, char *, bool);
451 extern struct afs_cell
*afs_cell_lookup(const char *, unsigned, bool);
452 extern struct afs_cell
*afs_grab_cell(struct afs_cell
*);
453 extern void afs_put_cell(struct afs_cell
*);
454 extern void afs_cell_purge(void);
459 extern bool afs_cm_incoming_call(struct afs_call
*);
464 extern const struct inode_operations afs_dir_inode_operations
;
465 extern const struct dentry_operations afs_fs_dentry_operations
;
466 extern const struct file_operations afs_dir_file_operations
;
471 extern const struct address_space_operations afs_fs_aops
;
472 extern const struct inode_operations afs_file_inode_operations
;
473 extern const struct file_operations afs_file_operations
;
475 extern int afs_open(struct inode
*, struct file
*);
476 extern int afs_release(struct inode
*, struct file
*);
477 extern int afs_page_filler(void *, struct page
*);
478 extern void afs_put_read(struct afs_read
*);
483 extern void __exit
afs_kill_lock_manager(void);
484 extern void afs_lock_work(struct work_struct
*);
485 extern void afs_lock_may_be_available(struct afs_vnode
*);
486 extern int afs_lock(struct file
*, int, struct file_lock
*);
487 extern int afs_flock(struct file
*, int, struct file_lock
*);
492 extern int afs_fs_fetch_file_status(struct afs_server
*, struct key
*,
493 struct afs_vnode
*, struct afs_volsync
*,
495 extern int afs_fs_give_up_callbacks(struct afs_server
*, bool);
496 extern int afs_fs_fetch_data(struct afs_server
*, struct key
*,
497 struct afs_vnode
*, struct afs_read
*, bool);
498 extern int afs_fs_create(struct afs_server
*, struct key
*,
499 struct afs_vnode
*, const char *, umode_t
,
500 struct afs_fid
*, struct afs_file_status
*,
501 struct afs_callback
*, bool);
502 extern int afs_fs_remove(struct afs_server
*, struct key
*,
503 struct afs_vnode
*, const char *, bool, bool);
504 extern int afs_fs_link(struct afs_server
*, struct key
*, struct afs_vnode
*,
505 struct afs_vnode
*, const char *, bool);
506 extern int afs_fs_symlink(struct afs_server
*, struct key
*,
507 struct afs_vnode
*, const char *, const char *,
508 struct afs_fid
*, struct afs_file_status
*, bool);
509 extern int afs_fs_rename(struct afs_server
*, struct key
*,
510 struct afs_vnode
*, const char *,
511 struct afs_vnode
*, const char *, bool);
512 extern int afs_fs_store_data(struct afs_server
*, struct afs_writeback
*,
513 pgoff_t
, pgoff_t
, unsigned, unsigned, bool);
514 extern int afs_fs_setattr(struct afs_server
*, struct key
*,
515 struct afs_vnode
*, struct iattr
*, bool);
516 extern int afs_fs_get_volume_status(struct afs_server
*, struct key
*,
518 struct afs_volume_status
*, bool);
519 extern int afs_fs_set_lock(struct afs_server
*, struct key
*,
520 struct afs_vnode
*, afs_lock_type_t
, bool);
521 extern int afs_fs_extend_lock(struct afs_server
*, struct key
*,
522 struct afs_vnode
*, bool);
523 extern int afs_fs_release_lock(struct afs_server
*, struct key
*,
524 struct afs_vnode
*, bool);
529 extern struct inode
*afs_iget_autocell(struct inode
*, const char *, int,
531 extern struct inode
*afs_iget(struct super_block
*, struct key
*,
532 struct afs_fid
*, struct afs_file_status
*,
533 struct afs_callback
*);
534 extern void afs_zap_data(struct afs_vnode
*);
535 extern int afs_validate(struct afs_vnode
*, struct key
*);
536 extern int afs_getattr(const struct path
*, struct kstat
*, u32
, unsigned int);
537 extern int afs_setattr(struct dentry
*, struct iattr
*);
538 extern void afs_evict_inode(struct inode
*);
539 extern int afs_drop_inode(struct inode
*);
544 extern struct workqueue_struct
*afs_wq
;
545 extern struct uuid_v1 afs_uuid
;
550 extern int afs_abort_to_error(u32
);
555 extern const struct inode_operations afs_mntpt_inode_operations
;
556 extern const struct inode_operations afs_autocell_inode_operations
;
557 extern const struct file_operations afs_mntpt_file_operations
;
559 extern struct vfsmount
*afs_d_automount(struct path
*);
560 extern int afs_mntpt_check_symlink(struct afs_vnode
*, struct key
*);
561 extern void afs_mntpt_kill_timer(void);
566 extern int afs_get_ipv4_interfaces(struct afs_interface
*, size_t, bool);
571 extern int afs_proc_init(void);
572 extern void afs_proc_cleanup(void);
573 extern int afs_proc_cell_setup(struct afs_cell
*);
574 extern void afs_proc_cell_remove(struct afs_cell
*);
579 extern struct socket
*afs_socket
;
580 extern atomic_t afs_outstanding_calls
;
582 extern int afs_open_socket(void);
583 extern void afs_close_socket(void);
584 extern void afs_put_call(struct afs_call
*);
585 extern int afs_queue_call_work(struct afs_call
*);
586 extern int afs_make_call(struct in_addr
*, struct afs_call
*, gfp_t
, bool);
587 extern struct afs_call
*afs_alloc_flat_call(const struct afs_call_type
*,
589 extern void afs_flat_call_destructor(struct afs_call
*);
590 extern void afs_send_empty_reply(struct afs_call
*);
591 extern void afs_send_simple_reply(struct afs_call
*, const void *, size_t);
592 extern int afs_extract_data(struct afs_call
*, void *, size_t, bool);
594 static inline int afs_transfer_reply(struct afs_call
*call
)
596 return afs_extract_data(call
, call
->buffer
, call
->reply_max
, false);
602 extern void afs_clear_permits(struct afs_vnode
*);
603 extern void afs_cache_permit(struct afs_vnode
*, struct key
*, long);
604 extern void afs_zap_permits(struct rcu_head
*);
605 extern struct key
*afs_request_key(struct afs_cell
*);
606 extern int afs_permission(struct inode
*, int);
611 extern spinlock_t afs_server_peer_lock
;
613 #define afs_get_server(S) \
615 _debug("GET SERVER %d", atomic_read(&(S)->usage)); \
616 atomic_inc(&(S)->usage); \
619 extern struct afs_server
*afs_lookup_server(struct afs_cell
*,
620 const struct in_addr
*);
621 extern struct afs_server
*afs_find_server(const struct sockaddr_rxrpc
*);
622 extern void afs_put_server(struct afs_server
*);
623 extern void __exit
afs_purge_servers(void);
628 extern int afs_fs_init(void);
629 extern void afs_fs_exit(void);
634 extern int afs_vl_get_entry_by_name(struct in_addr
*, struct key
*,
635 const char *, struct afs_cache_vlocation
*,
637 extern int afs_vl_get_entry_by_id(struct in_addr
*, struct key
*,
638 afs_volid_t
, afs_voltype_t
,
639 struct afs_cache_vlocation
*, bool);
644 #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0)
646 extern int __init
afs_vlocation_update_init(void);
647 extern struct afs_vlocation
*afs_vlocation_lookup(struct afs_cell
*,
649 const char *, size_t);
650 extern void afs_put_vlocation(struct afs_vlocation
*);
651 extern void afs_vlocation_purge(void);
656 static inline struct afs_vnode
*AFS_FS_I(struct inode
*inode
)
658 return container_of(inode
, struct afs_vnode
, vfs_inode
);
661 static inline struct inode
*AFS_VNODE_TO_I(struct afs_vnode
*vnode
)
663 return &vnode
->vfs_inode
;
666 extern void afs_vnode_finalise_status_update(struct afs_vnode
*,
667 struct afs_server
*);
668 extern int afs_vnode_fetch_status(struct afs_vnode
*, struct afs_vnode
*,
670 extern int afs_vnode_fetch_data(struct afs_vnode
*, struct key
*,
672 extern int afs_vnode_create(struct afs_vnode
*, struct key
*, const char *,
673 umode_t
, struct afs_fid
*, struct afs_file_status
*,
674 struct afs_callback
*, struct afs_server
**);
675 extern int afs_vnode_remove(struct afs_vnode
*, struct key
*, const char *,
677 extern int afs_vnode_link(struct afs_vnode
*, struct afs_vnode
*, struct key
*,
679 extern int afs_vnode_symlink(struct afs_vnode
*, struct key
*, const char *,
680 const char *, struct afs_fid
*,
681 struct afs_file_status
*, struct afs_server
**);
682 extern int afs_vnode_rename(struct afs_vnode
*, struct afs_vnode
*,
683 struct key
*, const char *, const char *);
684 extern int afs_vnode_store_data(struct afs_writeback
*, pgoff_t
, pgoff_t
,
686 extern int afs_vnode_setattr(struct afs_vnode
*, struct key
*, struct iattr
*);
687 extern int afs_vnode_get_volume_status(struct afs_vnode
*, struct key
*,
688 struct afs_volume_status
*);
689 extern int afs_vnode_set_lock(struct afs_vnode
*, struct key
*,
691 extern int afs_vnode_extend_lock(struct afs_vnode
*, struct key
*);
692 extern int afs_vnode_release_lock(struct afs_vnode
*, struct key
*);
697 #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0)
699 extern void afs_put_volume(struct afs_volume
*);
700 extern struct afs_volume
*afs_volume_lookup(struct afs_mount_params
*);
701 extern struct afs_server
*afs_volume_pick_fileserver(struct afs_vnode
*);
702 extern int afs_volume_release_fileserver(struct afs_vnode
*,
703 struct afs_server
*, int);
708 extern int afs_set_page_dirty(struct page
*);
709 extern void afs_put_writeback(struct afs_writeback
*);
710 extern int afs_write_begin(struct file
*file
, struct address_space
*mapping
,
711 loff_t pos
, unsigned len
, unsigned flags
,
712 struct page
**pagep
, void **fsdata
);
713 extern int afs_write_end(struct file
*file
, struct address_space
*mapping
,
714 loff_t pos
, unsigned len
, unsigned copied
,
715 struct page
*page
, void *fsdata
);
716 extern int afs_writepage(struct page
*, struct writeback_control
*);
717 extern int afs_writepages(struct address_space
*, struct writeback_control
*);
718 extern void afs_pages_written_back(struct afs_vnode
*, struct afs_call
*);
719 extern ssize_t
afs_file_write(struct kiocb
*, struct iov_iter
*);
720 extern int afs_writeback_all(struct afs_vnode
*);
721 extern int afs_fsync(struct file
*, loff_t
, loff_t
, int);
724 /*****************************************************************************/
728 #include <trace/events/afs.h>
730 extern unsigned afs_debug
;
732 #define dbgprintk(FMT,...) \
733 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
735 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
736 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
737 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
740 #if defined(__KDEBUG)
741 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
742 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
743 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
745 #elif defined(CONFIG_AFS_DEBUG)
746 #define AFS_DEBUG_KENTER 0x01
747 #define AFS_DEBUG_KLEAVE 0x02
748 #define AFS_DEBUG_KDEBUG 0x04
750 #define _enter(FMT,...) \
752 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
753 kenter(FMT,##__VA_ARGS__); \
756 #define _leave(FMT,...) \
758 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
759 kleave(FMT,##__VA_ARGS__); \
762 #define _debug(FMT,...) \
764 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
765 kdebug(FMT,##__VA_ARGS__); \
769 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
770 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
771 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
775 * debug assertion checking
777 #if 1 // defined(__KDEBUGALL)
781 if (unlikely(!(X))) { \
782 printk(KERN_ERR "\n"); \
783 printk(KERN_ERR "AFS: Assertion failed\n"); \
788 #define ASSERTCMP(X, OP, Y) \
790 if (unlikely(!((X) OP (Y)))) { \
791 printk(KERN_ERR "\n"); \
792 printk(KERN_ERR "AFS: Assertion failed\n"); \
793 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
794 (unsigned long)(X), (unsigned long)(Y)); \
795 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
796 (unsigned long)(X), (unsigned long)(Y)); \
801 #define ASSERTRANGE(L, OP1, N, OP2, H) \
803 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \
804 printk(KERN_ERR "\n"); \
805 printk(KERN_ERR "AFS: Assertion failed\n"); \
806 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \
807 (unsigned long)(L), (unsigned long)(N), \
808 (unsigned long)(H)); \
809 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
810 (unsigned long)(L), (unsigned long)(N), \
811 (unsigned long)(H)); \
816 #define ASSERTIF(C, X) \
818 if (unlikely((C) && !(X))) { \
819 printk(KERN_ERR "\n"); \
820 printk(KERN_ERR "AFS: Assertion failed\n"); \
825 #define ASSERTIFCMP(C, X, OP, Y) \
827 if (unlikely((C) && !((X) OP (Y)))) { \
828 printk(KERN_ERR "\n"); \
829 printk(KERN_ERR "AFS: Assertion failed\n"); \
830 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
831 (unsigned long)(X), (unsigned long)(Y)); \
832 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
833 (unsigned long)(X), (unsigned long)(Y)); \
844 #define ASSERTCMP(X, OP, Y) \
848 #define ASSERTRANGE(L, OP1, N, OP2, H) \
852 #define ASSERTIF(C, X) \
856 #define ASSERTIFCMP(C, X, OP, Y) \
860 #endif /* __KDEBUGALL */