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/skbuff.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>
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 void (*rx_wakeup
)(struct afs_call
*call
);
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 sk_buff_head rx_queue
; /* received packets */
81 struct rxrpc_call
*rxcall
; /* RxRPC call handle */
82 struct key
*key
; /* security for this call */
83 struct afs_server
*server
; /* server affected by incoming CM call */
84 void *request
; /* request data (first part) */
85 struct address_space
*mapping
; /* page set */
86 struct afs_writeback
*wb
; /* writeback being performed */
87 void *buffer
; /* reply receive buffer */
88 void *reply
; /* reply buffer (first part) */
89 void *reply2
; /* reply buffer (second part) */
90 void *reply3
; /* reply buffer (third part) */
91 void *reply4
; /* reply buffer (fourth part) */
92 pgoff_t first
; /* first page in mapping to deal with */
93 pgoff_t last
; /* last page in mapping to deal with */
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
, /* successfully completed */
102 AFS_CALL_BUSY
, /* server was busy */
103 AFS_CALL_ABORTED
, /* call was aborted */
104 AFS_CALL_ERROR
, /* call failed due to error */
106 int error
; /* error code */
107 unsigned request_size
; /* size of request data */
108 unsigned reply_max
; /* maximum size of reply */
109 unsigned reply_size
; /* current size of reply */
110 unsigned first_offset
; /* offset into mapping[first] */
111 unsigned last_to
; /* amount of mapping[last] */
112 unsigned short offset
; /* offset into received data store */
113 unsigned char unmarshall
; /* unmarshalling phase */
114 bool incoming
; /* T if incoming call */
115 bool send_pages
; /* T if data from mapping should be sent */
116 u16 service_id
; /* RxRPC service ID to call */
117 __be16 port
; /* target UDP port */
118 __be32 operation_ID
; /* operation ID for an incoming call */
119 u32 count
; /* count for use in unmarshalling */
120 __be32 tmp
; /* place to extract temporary data */
121 afs_dataversion_t store_version
; /* updated version expected from store */
124 struct afs_call_type
{
127 /* deliver request or reply data to an call
128 * - returning an error will cause the call to be aborted
130 int (*deliver
)(struct afs_call
*call
, struct sk_buff
*skb
,
133 /* map an abort code to an error number */
134 int (*abort_to_error
)(u32 abort_code
);
136 /* clean up a call */
137 void (*destructor
)(struct afs_call
*call
);
141 * record of an outstanding writeback on a vnode
143 struct afs_writeback
{
144 struct list_head link
; /* link in vnode->writebacks */
145 struct work_struct writer
; /* work item to perform the writeback */
146 struct afs_vnode
*vnode
; /* vnode to which this write applies */
147 struct key
*key
; /* owner of this write */
148 wait_queue_head_t waitq
; /* completion and ready wait queue */
149 pgoff_t first
; /* first page in batch */
150 pgoff_t point
; /* last page in current store op */
151 pgoff_t last
; /* last page in batch (inclusive) */
152 unsigned offset_first
; /* offset into first page of start of write */
153 unsigned to_last
; /* offset into last page of end of write */
154 int num_conflicts
; /* count of conflicting writes in list */
156 bool conflicts
; /* T if has dependent conflicts */
158 AFS_WBACK_SYNCING
, /* synchronisation being performed */
159 AFS_WBACK_PENDING
, /* write pending */
160 AFS_WBACK_CONFLICTING
, /* conflicting writes posted */
161 AFS_WBACK_WRITING
, /* writing back */
162 AFS_WBACK_COMPLETE
/* the writeback record has been unlinked */
163 } state
__attribute__((packed
));
167 * AFS superblock private data
168 * - there's one superblock per volume
170 struct afs_super_info
{
171 struct afs_volume
*volume
; /* volume record */
172 char rwparent
; /* T if parent is R/W AFS volume */
175 static inline struct afs_super_info
*AFS_FS_S(struct super_block
*sb
)
177 return sb
->s_fs_info
;
180 extern struct file_system_type afs_fs_type
;
183 * entry in the cached cell catalogue
185 struct afs_cache_cell
{
186 char name
[AFS_MAXCELLNAME
]; /* cell name (padded with NULs) */
187 struct in_addr vl_servers
[15]; /* cached cell VL servers */
195 struct list_head link
; /* main cell list link */
196 struct key
*anonymous_key
; /* anonymous user key for this cell */
197 struct list_head proc_link
; /* /proc cell list link */
198 struct proc_dir_entry
*proc_dir
; /* /proc dir for this cell */
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 */
412 * UUID definition [internet draft]
413 * - the timestamp is a 60-bit value, split 32/16/12, and goes in 100ns
414 * increments since midnight 15th October 1582
415 * - add AFS_UUID_TO_UNIX_TIME to convert unix time in 100ns units to UUID
417 * - the clock sequence is a 14-bit counter to avoid duplicate times
420 u32 time_low
; /* low part of timestamp */
421 u16 time_mid
; /* mid part of timestamp */
422 u16 time_hi_and_version
; /* high part of timestamp and version */
423 #define AFS_UUID_TO_UNIX_TIME 0x01b21dd213814000ULL
424 #define AFS_UUID_TIMEHI_MASK 0x0fff
425 #define AFS_UUID_VERSION_TIME 0x1000 /* time-based UUID */
426 #define AFS_UUID_VERSION_NAME 0x3000 /* name-based UUID */
427 #define AFS_UUID_VERSION_RANDOM 0x4000 /* (pseudo-)random generated UUID */
428 u8 clock_seq_hi_and_reserved
; /* clock seq hi and variant */
429 #define AFS_UUID_CLOCKHI_MASK 0x3f
430 #define AFS_UUID_VARIANT_STD 0x80
431 u8 clock_seq_low
; /* clock seq low */
432 u8 node
[6]; /* spatially unique node ID (MAC addr) */
435 /*****************************************************************************/
439 #ifdef CONFIG_AFS_FSCACHE
440 extern struct fscache_netfs afs_cache_netfs
;
441 extern struct fscache_cookie_def afs_cell_cache_index_def
;
442 extern struct fscache_cookie_def afs_vlocation_cache_index_def
;
443 extern struct fscache_cookie_def afs_volume_cache_index_def
;
444 extern struct fscache_cookie_def afs_vnode_cache_index_def
;
446 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL)
447 #define afs_vlocation_cache_index_def (*(struct fscache_cookie_def *) NULL)
448 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL)
449 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL)
455 extern void afs_init_callback_state(struct afs_server
*);
456 extern void afs_broken_callback_work(struct work_struct
*);
457 extern void afs_break_callbacks(struct afs_server
*, size_t,
458 struct afs_callback
[]);
459 extern void afs_discard_callback_on_delete(struct afs_vnode
*);
460 extern void afs_give_up_callback(struct afs_vnode
*);
461 extern void afs_dispatch_give_up_callbacks(struct work_struct
*);
462 extern void afs_flush_callback_breaks(struct afs_server
*);
463 extern int __init
afs_callback_update_init(void);
464 extern void afs_callback_update_kill(void);
469 extern struct rw_semaphore afs_proc_cells_sem
;
470 extern struct list_head afs_proc_cells
;
472 #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0)
473 extern int afs_cell_init(char *);
474 extern struct afs_cell
*afs_cell_create(const char *, unsigned, char *, bool);
475 extern struct afs_cell
*afs_cell_lookup(const char *, unsigned, bool);
476 extern struct afs_cell
*afs_grab_cell(struct afs_cell
*);
477 extern void afs_put_cell(struct afs_cell
*);
478 extern void afs_cell_purge(void);
483 extern bool afs_cm_incoming_call(struct afs_call
*);
488 extern const struct inode_operations afs_dir_inode_operations
;
489 extern const struct dentry_operations afs_fs_dentry_operations
;
490 extern const struct file_operations afs_dir_file_operations
;
495 extern const struct address_space_operations afs_fs_aops
;
496 extern const struct inode_operations afs_file_inode_operations
;
497 extern const struct file_operations afs_file_operations
;
499 extern int afs_open(struct inode
*, struct file
*);
500 extern int afs_release(struct inode
*, struct file
*);
501 extern int afs_page_filler(void *, struct page
*);
506 extern void __exit
afs_kill_lock_manager(void);
507 extern void afs_lock_work(struct work_struct
*);
508 extern void afs_lock_may_be_available(struct afs_vnode
*);
509 extern int afs_lock(struct file
*, int, struct file_lock
*);
510 extern int afs_flock(struct file
*, int, struct file_lock
*);
515 extern int afs_fs_fetch_file_status(struct afs_server
*, struct key
*,
516 struct afs_vnode
*, struct afs_volsync
*,
517 const struct afs_wait_mode
*);
518 extern int afs_fs_give_up_callbacks(struct afs_server
*,
519 const struct afs_wait_mode
*);
520 extern int afs_fs_fetch_data(struct afs_server
*, struct key
*,
521 struct afs_vnode
*, off_t
, size_t, struct page
*,
522 const struct afs_wait_mode
*);
523 extern int afs_fs_create(struct afs_server
*, struct key
*,
524 struct afs_vnode
*, const char *, umode_t
,
525 struct afs_fid
*, struct afs_file_status
*,
526 struct afs_callback
*,
527 const struct afs_wait_mode
*);
528 extern int afs_fs_remove(struct afs_server
*, struct key
*,
529 struct afs_vnode
*, const char *, bool,
530 const struct afs_wait_mode
*);
531 extern int afs_fs_link(struct afs_server
*, struct key
*, struct afs_vnode
*,
532 struct afs_vnode
*, const char *,
533 const struct afs_wait_mode
*);
534 extern int afs_fs_symlink(struct afs_server
*, struct key
*,
535 struct afs_vnode
*, const char *, const char *,
536 struct afs_fid
*, struct afs_file_status
*,
537 const struct afs_wait_mode
*);
538 extern int afs_fs_rename(struct afs_server
*, struct key
*,
539 struct afs_vnode
*, const char *,
540 struct afs_vnode
*, const char *,
541 const struct afs_wait_mode
*);
542 extern int afs_fs_store_data(struct afs_server
*, struct afs_writeback
*,
543 pgoff_t
, pgoff_t
, unsigned, unsigned,
544 const struct afs_wait_mode
*);
545 extern int afs_fs_setattr(struct afs_server
*, struct key
*,
546 struct afs_vnode
*, struct iattr
*,
547 const struct afs_wait_mode
*);
548 extern int afs_fs_get_volume_status(struct afs_server
*, struct key
*,
550 struct afs_volume_status
*,
551 const struct afs_wait_mode
*);
552 extern int afs_fs_set_lock(struct afs_server
*, struct key
*,
553 struct afs_vnode
*, afs_lock_type_t
,
554 const struct afs_wait_mode
*);
555 extern int afs_fs_extend_lock(struct afs_server
*, struct key
*,
557 const struct afs_wait_mode
*);
558 extern int afs_fs_release_lock(struct afs_server
*, struct key
*,
560 const struct afs_wait_mode
*);
565 extern struct inode
*afs_iget_autocell(struct inode
*, const char *, int,
567 extern struct inode
*afs_iget(struct super_block
*, struct key
*,
568 struct afs_fid
*, struct afs_file_status
*,
569 struct afs_callback
*);
570 extern void afs_zap_data(struct afs_vnode
*);
571 extern int afs_validate(struct afs_vnode
*, struct key
*);
572 extern int afs_getattr(struct vfsmount
*, struct dentry
*, struct kstat
*);
573 extern int afs_setattr(struct dentry
*, struct iattr
*);
574 extern void afs_evict_inode(struct inode
*);
575 extern int afs_drop_inode(struct inode
*);
580 extern struct afs_uuid afs_uuid
;
585 extern int afs_abort_to_error(u32
);
590 extern const struct inode_operations afs_mntpt_inode_operations
;
591 extern const struct inode_operations afs_autocell_inode_operations
;
592 extern const struct file_operations afs_mntpt_file_operations
;
594 extern int afs_mntpt_check_symlink(struct afs_vnode
*, struct key
*);
595 extern void afs_mntpt_kill_timer(void);
600 extern int afs_proc_init(void);
601 extern void afs_proc_cleanup(void);
602 extern int afs_proc_cell_setup(struct afs_cell
*);
603 extern void afs_proc_cell_remove(struct afs_cell
*);
608 extern int afs_open_socket(void);
609 extern void afs_close_socket(void);
610 extern int afs_make_call(struct in_addr
*, struct afs_call
*, gfp_t
,
611 const struct afs_wait_mode
*);
612 extern struct afs_call
*afs_alloc_flat_call(const struct afs_call_type
*,
614 extern void afs_flat_call_destructor(struct afs_call
*);
615 extern void afs_transfer_reply(struct afs_call
*, struct sk_buff
*);
616 extern void afs_send_empty_reply(struct afs_call
*);
617 extern void afs_send_simple_reply(struct afs_call
*, const void *, size_t);
618 extern int afs_extract_data(struct afs_call
*, struct sk_buff
*, bool, void *,
624 extern void afs_clear_permits(struct afs_vnode
*);
625 extern void afs_cache_permit(struct afs_vnode
*, struct key
*, long);
626 extern void afs_zap_permits(struct rcu_head
*);
627 extern struct key
*afs_request_key(struct afs_cell
*);
628 extern int afs_permission(struct inode
*, int, unsigned int);
633 extern spinlock_t afs_server_peer_lock
;
635 #define afs_get_server(S) \
637 _debug("GET SERVER %d", atomic_read(&(S)->usage)); \
638 atomic_inc(&(S)->usage); \
641 extern struct afs_server
*afs_lookup_server(struct afs_cell
*,
642 const struct in_addr
*);
643 extern struct afs_server
*afs_find_server(const struct in_addr
*);
644 extern void afs_put_server(struct afs_server
*);
645 extern void __exit
afs_purge_servers(void);
650 extern int afs_fs_init(void);
651 extern void afs_fs_exit(void);
656 extern int afs_get_ipv4_interfaces(struct afs_interface
*, size_t, bool);
657 extern int afs_get_MAC_address(u8
*, size_t);
662 extern int afs_vl_get_entry_by_name(struct in_addr
*, struct key
*,
663 const char *, struct afs_cache_vlocation
*,
664 const struct afs_wait_mode
*);
665 extern int afs_vl_get_entry_by_id(struct in_addr
*, struct key
*,
666 afs_volid_t
, afs_voltype_t
,
667 struct afs_cache_vlocation
*,
668 const struct afs_wait_mode
*);
673 #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0)
675 extern int __init
afs_vlocation_update_init(void);
676 extern struct afs_vlocation
*afs_vlocation_lookup(struct afs_cell
*,
678 const char *, size_t);
679 extern void afs_put_vlocation(struct afs_vlocation
*);
680 extern void afs_vlocation_purge(void);
685 static inline struct afs_vnode
*AFS_FS_I(struct inode
*inode
)
687 return container_of(inode
, struct afs_vnode
, vfs_inode
);
690 static inline struct inode
*AFS_VNODE_TO_I(struct afs_vnode
*vnode
)
692 return &vnode
->vfs_inode
;
695 extern void afs_vnode_finalise_status_update(struct afs_vnode
*,
696 struct afs_server
*);
697 extern int afs_vnode_fetch_status(struct afs_vnode
*, struct afs_vnode
*,
699 extern int afs_vnode_fetch_data(struct afs_vnode
*, struct key
*,
700 off_t
, size_t, struct page
*);
701 extern int afs_vnode_create(struct afs_vnode
*, struct key
*, const char *,
702 umode_t
, struct afs_fid
*, struct afs_file_status
*,
703 struct afs_callback
*, struct afs_server
**);
704 extern int afs_vnode_remove(struct afs_vnode
*, struct key
*, const char *,
706 extern int afs_vnode_link(struct afs_vnode
*, struct afs_vnode
*, struct key
*,
708 extern int afs_vnode_symlink(struct afs_vnode
*, struct key
*, const char *,
709 const char *, struct afs_fid
*,
710 struct afs_file_status
*, struct afs_server
**);
711 extern int afs_vnode_rename(struct afs_vnode
*, struct afs_vnode
*,
712 struct key
*, const char *, const char *);
713 extern int afs_vnode_store_data(struct afs_writeback
*, pgoff_t
, pgoff_t
,
715 extern int afs_vnode_setattr(struct afs_vnode
*, struct key
*, struct iattr
*);
716 extern int afs_vnode_get_volume_status(struct afs_vnode
*, struct key
*,
717 struct afs_volume_status
*);
718 extern int afs_vnode_set_lock(struct afs_vnode
*, struct key
*,
720 extern int afs_vnode_extend_lock(struct afs_vnode
*, struct key
*);
721 extern int afs_vnode_release_lock(struct afs_vnode
*, struct key
*);
726 #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0)
728 extern void afs_put_volume(struct afs_volume
*);
729 extern struct afs_volume
*afs_volume_lookup(struct afs_mount_params
*);
730 extern struct afs_server
*afs_volume_pick_fileserver(struct afs_vnode
*);
731 extern int afs_volume_release_fileserver(struct afs_vnode
*,
732 struct afs_server
*, int);
737 extern int afs_set_page_dirty(struct page
*);
738 extern void afs_put_writeback(struct afs_writeback
*);
739 extern int afs_write_begin(struct file
*file
, struct address_space
*mapping
,
740 loff_t pos
, unsigned len
, unsigned flags
,
741 struct page
**pagep
, void **fsdata
);
742 extern int afs_write_end(struct file
*file
, struct address_space
*mapping
,
743 loff_t pos
, unsigned len
, unsigned copied
,
744 struct page
*page
, void *fsdata
);
745 extern int afs_writepage(struct page
*, struct writeback_control
*);
746 extern int afs_writepages(struct address_space
*, struct writeback_control
*);
747 extern void afs_pages_written_back(struct afs_vnode
*, struct afs_call
*);
748 extern ssize_t
afs_file_write(struct kiocb
*, const struct iovec
*,
749 unsigned long, loff_t
);
750 extern int afs_writeback_all(struct afs_vnode
*);
751 extern int afs_fsync(struct file
*, int);
754 /*****************************************************************************/
758 extern unsigned afs_debug
;
760 #define dbgprintk(FMT,...) \
761 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
763 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
764 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
765 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
768 #if defined(__KDEBUG)
769 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
770 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
771 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
773 #elif defined(CONFIG_AFS_DEBUG)
774 #define AFS_DEBUG_KENTER 0x01
775 #define AFS_DEBUG_KLEAVE 0x02
776 #define AFS_DEBUG_KDEBUG 0x04
778 #define _enter(FMT,...) \
780 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
781 kenter(FMT,##__VA_ARGS__); \
784 #define _leave(FMT,...) \
786 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
787 kleave(FMT,##__VA_ARGS__); \
790 #define _debug(FMT,...) \
792 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
793 kdebug(FMT,##__VA_ARGS__); \
797 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
798 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
799 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
803 * debug assertion checking
805 #if 1 // defined(__KDEBUGALL)
809 if (unlikely(!(X))) { \
810 printk(KERN_ERR "\n"); \
811 printk(KERN_ERR "AFS: Assertion failed\n"); \
816 #define ASSERTCMP(X, OP, Y) \
818 if (unlikely(!((X) OP (Y)))) { \
819 printk(KERN_ERR "\n"); \
820 printk(KERN_ERR "AFS: Assertion failed\n"); \
821 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
822 (unsigned long)(X), (unsigned long)(Y)); \
823 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
824 (unsigned long)(X), (unsigned long)(Y)); \
829 #define ASSERTRANGE(L, OP1, N, OP2, H) \
831 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \
832 printk(KERN_ERR "\n"); \
833 printk(KERN_ERR "AFS: Assertion failed\n"); \
834 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \
835 (unsigned long)(L), (unsigned long)(N), \
836 (unsigned long)(H)); \
837 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
838 (unsigned long)(L), (unsigned long)(N), \
839 (unsigned long)(H)); \
844 #define ASSERTIF(C, X) \
846 if (unlikely((C) && !(X))) { \
847 printk(KERN_ERR "\n"); \
848 printk(KERN_ERR "AFS: Assertion failed\n"); \
853 #define ASSERTIFCMP(C, X, OP, Y) \
855 if (unlikely((C) && !((X) OP (Y)))) { \
856 printk(KERN_ERR "\n"); \
857 printk(KERN_ERR "AFS: Assertion failed\n"); \
858 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
859 (unsigned long)(X), (unsigned long)(Y)); \
860 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
861 (unsigned long)(X), (unsigned long)(Y)); \
872 #define ASSERTCMP(X, OP, Y) \
876 #define ASSERTRANGE(L, OP1, N, OP2, H) \
880 #define ASSERTIF(C, X) \
884 #define ASSERTIFCMP(C, X, OP, Y) \
888 #endif /* __KDEBUGALL */