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fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / afs / internal.h
CommitLineData
ec26815a 1/* internal AFS stuff
1da177e4 2 *
08e0e7c8 3 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
1da177e4
LT		 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
1da177e4
LT		 12#include <linux/compiler.h>
13#include <linux/kernel.h>
14#include <linux/fs.h>
15#include <linux/pagemap.h>
08e0e7c8
DH		 16#include <linux/skbuff.h>
17#include <linux/rxrpc.h>
00d3b7a4 18#include <linux/key.h>
e8edc6e0 19#include <linux/workqueue.h>
00c541ea 20#include <linux/sched.h>
80e50be4 21#include <linux/fscache.h>
e1da0222 22#include <linux/backing-dev.h>
00c541ea 23
08e0e7c8
DH		 24#include "afs.h"
25#include "afs_vl.h"
26
27#define AFS_CELL_MAX_ADDRS 15
28
31143d5d 29struct pagevec;
08e0e7c8
DH		 30struct afs_call;
31
32typedef enum {
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;
1da177e4 41
00d3b7a4
DH		 42struct afs_mount_params {
43 bool rwpath; /* T if the parent should be considered R/W */
44 bool force; /* T to force cell type */
bec5eb61 45 bool autocell; /* T if set auto mount operation */
00d3b7a4
DH		 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 */
52};
53
1da177e4 54/*
08e0e7c8 55 * definition of how to wait for the completion of an operation
1da177e4 56 */
08e0e7c8
DH		 57struct afs_wait_mode {
58 /* RxRPC received message notification */
59 void (*rx_wakeup)(struct afs_call *call);
1da177e4 60
08e0e7c8
DH		 61 /* synchronous call waiter and call dispatched notification */
62 int (*wait)(struct afs_call *call);
63
64 /* asynchronous call completion */
65 void (*async_complete)(void *reply, int error);
66};
67
68extern const struct afs_wait_mode afs_sync_call;
69extern const struct afs_wait_mode afs_async_call;
70
71/*
72 * a record of an in-progress RxRPC call
73 */
74struct afs_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) */
31143d5d
DH		 85 struct address_space *mapping; /* page set */
86 struct afs_writeback *wb; /* writeback being performed */
08e0e7c8
DH		 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) */
260a9803 91 void *reply4; /* reply buffer (fourth part) */
31143d5d
DH		 92 pgoff_t first; /* first page in mapping to deal with */
93 pgoff_t last; /* last page in mapping to deal with */
08e0e7c8
DH		 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 */
105 } state;
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 */
31143d5d
DH		 110 unsigned first_offset; /* offset into mapping[first] */
111 unsigned last_to; /* amount of mapping[last] */
08e0e7c8
DH		 112 unsigned short offset; /* offset into received data store */
113 unsigned char unmarshall; /* unmarshalling phase */
114 bool incoming; /* T if incoming call */
31143d5d 115 bool send_pages; /* T if data from mapping should be sent */
08e0e7c8
DH		 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 */
31143d5d 121 afs_dataversion_t store_version; /* updated version expected from store */
08e0e7c8
DH		 122};
123
124struct afs_call_type {
00d3b7a4
DH		 125 const char *name;
126
08e0e7c8
DH		 127 /* deliver request or reply data to an call
128 * - returning an error will cause the call to be aborted
129 */
130 int (*deliver)(struct afs_call *call, struct sk_buff *skb,
131 bool last);
132
133 /* map an abort code to an error number */
134 int (*abort_to_error)(u32 abort_code);
135
136 /* clean up a call */
137 void (*destructor)(struct afs_call *call);
138};
139
31143d5d
DH		 140/*
141 * record of an outstanding writeback on a vnode
142 */
143struct 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 */
155 int usage;
156 bool conflicts; /* T if has dependent conflicts */
157 enum {
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));
164};
165
08e0e7c8
DH		 166/*
167 * AFS superblock private data
168 * - there's one superblock per volume
169 */
170struct afs_super_info {
171 struct afs_volume *volume; /* volume record */
172 char rwparent; /* T if parent is R/W AFS volume */
173};
1da177e4 174
08e0e7c8
DH		 175static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
176{
177 return sb->s_fs_info;
1da177e4
LT		 178}
179
08e0e7c8
DH		 180extern struct file_system_type afs_fs_type;
181
182/*
183 * entry in the cached cell catalogue
184 */
185struct afs_cache_cell {
00d3b7a4
DH		 186 char name[AFS_MAXCELLNAME]; /* cell name (padded with NULs) */
187 struct in_addr vl_servers[15]; /* cached cell VL servers */
08e0e7c8
DH		 188};
189
190/*
191 * AFS cell record
192 */
193struct afs_cell {
194 atomic_t usage;
195 struct list_head link; /* main cell list link */
00d3b7a4 196 struct key *anonymous_key; /* anonymous user key for this cell */
08e0e7c8
DH		 197 struct list_head proc_link; /* /proc cell list link */
198 struct proc_dir_entry *proc_dir; /* /proc dir for this cell */
9b3f26c9
DH		 199#ifdef CONFIG_AFS_FSCACHE
200 struct fscache_cookie *cache; /* caching cookie */
08e0e7c8
DH		 201#endif
202
203 /* server record management */
204 rwlock_t servers_lock; /* active server list lock */
205 struct list_head servers; /* active server list */
206
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 */
214
215 char name[0]; /* cell name - must go last */
216};
217
218/*
219 * entry in the cached volume location catalogue
220 */
221struct afs_cache_vlocation {
00d3b7a4
DH		 222 /* volume name (lowercase, padded with NULs) */
223 uint8_t name[AFS_MAXVOLNAME + 1];
224
08e0e7c8
DH		 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) */
231
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 */
235};
236
237/*
238 * volume -> vnode hash table entry
239 */
240struct afs_cache_vhash {
241 afs_voltype_t vtype; /* which volume variation */
242 uint8_t hash_bucket; /* which hash bucket this represents */
243} __attribute__((packed));
244
245/*
246 * AFS volume location record
247 */
248struct afs_vlocation {
249 atomic_t usage;
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 */
9b3f26c9
DH		 255#ifdef CONFIG_AFS_FSCACHE
256 struct fscache_cookie *cache; /* caching cookie */
08e0e7c8
DH		 257#endif
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 */
39bf0949 262 spinlock_t lock; /* access lock */
08e0e7c8
DH		 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 */
267};
268
269/*
270 * AFS fileserver record
271 */
272struct afs_server {
273 atomic_t usage;
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 */
281
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) */
288
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 */
299};
300
301/*
302 * AFS volume access record
303 */
304struct afs_volume {
305 atomic_t usage;
306 struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */
307 struct afs_vlocation *vlocation; /* volume location */
9b3f26c9
DH		 308#ifdef CONFIG_AFS_FSCACHE
309 struct fscache_cookie *cache; /* caching cookie */
08e0e7c8
DH		 310#endif
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 */
e1da0222 318 struct backing_dev_info bdi;
08e0e7c8
DH		 319};
320
321/*
322 * vnode catalogue entry
323 */
324struct 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 */
328};
329
330/*
331 * AFS inode private data
332 */
333struct afs_vnode {
334 struct inode vfs_inode; /* the VFS's inode record */
335
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 */
9b3f26c9
DH		 340#ifdef CONFIG_AFS_FSCACHE
341 struct fscache_cookie *cache; /* caching cookie */
08e0e7c8 342#endif
00d3b7a4
DH		 343 struct afs_permits *permits; /* cache of permits so far obtained */
344 struct mutex permits_lock; /* lock for altering permits list */
260a9803 345 struct mutex validate_lock; /* lock for validating this vnode */
08e0e7c8 346 wait_queue_head_t update_waitq; /* status fetch waitqueue */
260a9803 347 int update_cnt; /* number of outstanding ops that will update the
08e0e7c8 348 * status */
31143d5d 349 spinlock_t writeback_lock; /* lock for writebacks */
08e0e7c8
DH		 350 spinlock_t lock; /* waitqueue/flags lock */
351 unsigned long flags;
352#define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */
260a9803 353#define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */
08e0e7c8
DH		 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 */
e8d6c554
DH		 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 */
bec5eb61 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 */
08e0e7c8 364
00d3b7a4
DH		 365 long acl_order; /* ACL check count (callback break count) */
366
31143d5d 367 struct list_head writebacks; /* alterations in pagecache that need writing */
e8d6c554
DH		 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 */
31143d5d 372
08e0e7c8
DH		 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 */
08e0e7c8
DH		 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 */
383};
384
00d3b7a4
DH		 385/*
386 * cached security record for one user's attempt to access a vnode
387 */
388struct afs_permit {
389 struct key *key; /* RxRPC ticket holding a security context */
390 afs_access_t access_mask; /* access mask for this key */
391};
392
393/*
394 * cache of security records from attempts to access a vnode
395 */
396struct afs_permits {
397 struct rcu_head rcu; /* disposal procedure */
398 int count; /* number of records */
399 struct afs_permit permits[0]; /* the permits so far examined */
400};
401
b908fe6b
DH		 402/*
403 * record of one of a system's set of network interfaces
404 */
405struct afs_interface {
b908fe6b
DH		 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 */
409};
410
411/*
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
416 * time
417 * - the clock sequence is a 14-bit counter to avoid duplicate times
418 */
419struct afs_uuid {
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 */
b1bdb691 423#define AFS_UUID_TO_UNIX_TIME 0x01b21dd213814000ULL
b908fe6b
DH		 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) */
433};
434
08e0e7c8 435/*****************************************************************************/
9b3f26c9
DH		 436/*
437 * cache.c
438 */
439#ifdef CONFIG_AFS_FSCACHE
440extern struct fscache_netfs afs_cache_netfs;
441extern struct fscache_cookie_def afs_cell_cache_index_def;
442extern struct fscache_cookie_def afs_vlocation_cache_index_def;
443extern struct fscache_cookie_def afs_volume_cache_index_def;
444extern struct fscache_cookie_def afs_vnode_cache_index_def;
445#else
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)
450#endif
451
08e0e7c8
DH		 452/*
453 * callback.c
454 */
455extern void afs_init_callback_state(struct afs_server *);
456extern void afs_broken_callback_work(struct work_struct *);
457extern void afs_break_callbacks(struct afs_server *, size_t,
458 struct afs_callback[]);
260a9803 459extern void afs_discard_callback_on_delete(struct afs_vnode *);
08e0e7c8
DH		 460extern void afs_give_up_callback(struct afs_vnode *);
461extern void afs_dispatch_give_up_callbacks(struct work_struct *);
462extern void afs_flush_callback_breaks(struct afs_server *);
463extern int __init afs_callback_update_init(void);
fbb3fcba 464extern void afs_callback_update_kill(void);
08e0e7c8 465
1da177e4
LT		 466/*
467 * cell.c
468 */
469extern struct rw_semaphore afs_proc_cells_sem;
470extern struct list_head afs_proc_cells;
1da177e4 471
08e0e7c8
DH		 472#define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0)
473extern int afs_cell_init(char *);
bec5eb61 474extern struct afs_cell *afs_cell_create(const char *, unsigned, char *, bool);
475extern struct afs_cell *afs_cell_lookup(const char *, unsigned, bool);
08e0e7c8
DH		 476extern struct afs_cell *afs_grab_cell(struct afs_cell *);
477extern void afs_put_cell(struct afs_cell *);
478extern void afs_cell_purge(void);
479
480/*
481 * cmservice.c
482 */
483extern bool afs_cm_incoming_call(struct afs_call *);
484
1da177e4
LT		 485/*
486 * dir.c
487 */
754661f1 488extern const struct inode_operations afs_dir_inode_operations;
d61dcce2 489extern const struct dentry_operations afs_fs_dentry_operations;
4b6f5d20 490extern const struct file_operations afs_dir_file_operations;
1da177e4
LT		 491
492/*
493 * file.c
494 */
f5e54d6e 495extern const struct address_space_operations afs_fs_aops;
754661f1 496extern const struct inode_operations afs_file_inode_operations;
00d3b7a4
DH		 497extern const struct file_operations afs_file_operations;
498
499extern int afs_open(struct inode *, struct file *);
500extern int afs_release(struct inode *, struct file *);
f6d335c0 501extern int afs_page_filler(void *, struct page *);
1da177e4 502
e8d6c554
DH		 503/*
504 * flock.c
505 */
506extern void __exit afs_kill_lock_manager(void);
507extern void afs_lock_work(struct work_struct *);
508extern void afs_lock_may_be_available(struct afs_vnode *);
509extern int afs_lock(struct file *, int, struct file_lock *);
510extern int afs_flock(struct file *, int, struct file_lock *);
511
08e0e7c8
DH		 512/*
513 * fsclient.c
514 */
00d3b7a4
DH		 515extern int afs_fs_fetch_file_status(struct afs_server *, struct key *,
516 struct afs_vnode *, struct afs_volsync *,
08e0e7c8
DH		 517 const struct afs_wait_mode *);
518extern int afs_fs_give_up_callbacks(struct afs_server *,
519 const struct afs_wait_mode *);
00d3b7a4
DH		 520extern int afs_fs_fetch_data(struct afs_server *, struct key *,
521 struct afs_vnode *, off_t, size_t, struct page *,
08e0e7c8 522 const struct afs_wait_mode *);
260a9803
DH		 523extern 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 *);
528extern int afs_fs_remove(struct afs_server *, struct key *,
529 struct afs_vnode *, const char *, bool,
530 const struct afs_wait_mode *);
531extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *,
532 struct afs_vnode *, const char *,
533 const struct afs_wait_mode *);
534extern 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 *);
538extern 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 *);
31143d5d
DH		 542extern int afs_fs_store_data(struct afs_server *, struct afs_writeback *,
543 pgoff_t, pgoff_t, unsigned, unsigned,
544 const struct afs_wait_mode *);
545extern int afs_fs_setattr(struct afs_server *, struct key *,
546 struct afs_vnode *, struct iattr *,
547 const struct afs_wait_mode *);
45222b9e
DH		 548extern int afs_fs_get_volume_status(struct afs_server *, struct key *,
549 struct afs_vnode *,
550 struct afs_volume_status *,
551 const struct afs_wait_mode *);
e8d6c554
DH		 552extern int afs_fs_set_lock(struct afs_server *, struct key *,
553 struct afs_vnode *, afs_lock_type_t,
554 const struct afs_wait_mode *);
555extern int afs_fs_extend_lock(struct afs_server *, struct key *,
556 struct afs_vnode *,
557 const struct afs_wait_mode *);
558extern int afs_fs_release_lock(struct afs_server *, struct key *,
559 struct afs_vnode *,
560 const struct afs_wait_mode *);
08e0e7c8 561
1da177e4
LT		 562/*
563 * inode.c
564 */
bec5eb61 565extern struct inode *afs_iget_autocell(struct inode *, const char *, int,
566 struct key *);
00d3b7a4 567extern struct inode *afs_iget(struct super_block *, struct key *,
260a9803
DH		 568 struct afs_fid *, struct afs_file_status *,
569 struct afs_callback *);
416351f2 570extern void afs_zap_data(struct afs_vnode *);
260a9803 571extern int afs_validate(struct afs_vnode *, struct key *);
416351f2 572extern int afs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
31143d5d 573extern int afs_setattr(struct dentry *, struct iattr *);
b57922d9 574extern void afs_evict_inode(struct inode *);
bec5eb61 575extern int afs_drop_inode(struct inode *);
1da177e4
LT		 576
577/*
578 * main.c
579 */
0ad53eee 580extern struct workqueue_struct *afs_wq;
b908fe6b 581extern struct afs_uuid afs_uuid;
1da177e4 582
08e0e7c8
DH		 583/*
584 * misc.c
585 */
586extern int afs_abort_to_error(u32);
587
1da177e4
LT		 588/*
589 * mntpt.c
590 */
754661f1 591extern const struct inode_operations afs_mntpt_inode_operations;
bec5eb61 592extern const struct inode_operations afs_autocell_inode_operations;
4b6f5d20 593extern const struct file_operations afs_mntpt_file_operations;
1da177e4 594
d18610b0 595extern struct vfsmount *afs_d_automount(struct path *);
00d3b7a4 596extern int afs_mntpt_check_symlink(struct afs_vnode *, struct key *);
08e0e7c8 597extern void afs_mntpt_kill_timer(void);
1da177e4 598
1da177e4
LT		 599/*
600 * proc.c
601 */
602extern int afs_proc_init(void);
603extern void afs_proc_cleanup(void);
ec26815a
DH		 604extern int afs_proc_cell_setup(struct afs_cell *);
605extern void afs_proc_cell_remove(struct afs_cell *);
1da177e4 606
08e0e7c8
DH		 607/*
608 * rxrpc.c
609 */
610extern int afs_open_socket(void);
611extern void afs_close_socket(void);
612extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t,
613 const struct afs_wait_mode *);
614extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *,
615 size_t, size_t);
616extern void afs_flat_call_destructor(struct afs_call *);
617extern void afs_transfer_reply(struct afs_call *, struct sk_buff *);
618extern void afs_send_empty_reply(struct afs_call *);
b908fe6b 619extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
08e0e7c8
DH		 620extern int afs_extract_data(struct afs_call *, struct sk_buff *, bool, void *,
621 size_t);
622
00d3b7a4
DH		 623/*
624 * security.c
625 */
626extern void afs_clear_permits(struct afs_vnode *);
627extern void afs_cache_permit(struct afs_vnode *, struct key *, long);
416351f2 628extern void afs_zap_permits(struct rcu_head *);
00d3b7a4 629extern struct key *afs_request_key(struct afs_cell *);
10556cb2 630extern int afs_permission(struct inode *, int);
00d3b7a4 631
08e0e7c8
DH		 632/*
633 * server.c
634 */
635extern spinlock_t afs_server_peer_lock;
636
260a9803
DH		 637#define afs_get_server(S) \
638do { \
639 _debug("GET SERVER %d", atomic_read(&(S)->usage)); \
640 atomic_inc(&(S)->usage); \
641} while(0)
08e0e7c8
DH		 642
643extern struct afs_server *afs_lookup_server(struct afs_cell *,
644 const struct in_addr *);
645extern struct afs_server *afs_find_server(const struct in_addr *);
646extern void afs_put_server(struct afs_server *);
647extern void __exit afs_purge_servers(void);
648
00d3b7a4
DH		 649/*
650 * super.c
651 */
652extern int afs_fs_init(void);
653extern void afs_fs_exit(void);
654
b908fe6b
DH		 655/*
656 * use-rtnetlink.c
657 */
658extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool);
ec9c9485 659extern int afs_get_MAC_address(u8 *, size_t);
b908fe6b 660
08e0e7c8
DH		 661/*
662 * vlclient.c
663 */
00d3b7a4
DH		 664extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *,
665 const char *, struct afs_cache_vlocation *,
08e0e7c8 666 const struct afs_wait_mode *);
00d3b7a4
DH		 667extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *,
668 afs_volid_t, afs_voltype_t,
08e0e7c8
DH		 669 struct afs_cache_vlocation *,
670 const struct afs_wait_mode *);
671
672/*
673 * vlocation.c
674 */
675#define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0)
676
677extern int __init afs_vlocation_update_init(void);
678extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *,
00d3b7a4 679 struct key *,
08e0e7c8
DH		 680 const char *, size_t);
681extern void afs_put_vlocation(struct afs_vlocation *);
fbb3fcba 682extern void afs_vlocation_purge(void);
08e0e7c8
DH		 683
684/*
685 * vnode.c
686 */
08e0e7c8
DH		 687static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
688{
689 return container_of(inode, struct afs_vnode, vfs_inode);
690}
691
692static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
693{
694 return &vnode->vfs_inode;
695}
696
260a9803
DH		 697extern void afs_vnode_finalise_status_update(struct afs_vnode *,
698 struct afs_server *);
00d3b7a4
DH		 699extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *,
700 struct key *);
701extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *,
702 off_t, size_t, struct page *);
260a9803
DH		 703extern 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 **);
706extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *,
707 bool);
708extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *,
709 const char *);
710extern 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 **);
713extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *,
714 struct key *, const char *, const char *);
31143d5d
DH		 715extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t,
716 unsigned, unsigned);
717extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *);
45222b9e
DH		 718extern int afs_vnode_get_volume_status(struct afs_vnode *, struct key *,
719 struct afs_volume_status *);
e8d6c554
DH		 720extern int afs_vnode_set_lock(struct afs_vnode *, struct key *,
721 afs_lock_type_t);
722extern int afs_vnode_extend_lock(struct afs_vnode *, struct key *);
723extern int afs_vnode_release_lock(struct afs_vnode *, struct key *);
08e0e7c8
DH		 724
725/*
726 * volume.c
727 */
08e0e7c8
DH		 728#define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0)
729
730extern void afs_put_volume(struct afs_volume *);
00d3b7a4 731extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *);
08e0e7c8
DH		 732extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *);
733extern int afs_volume_release_fileserver(struct afs_vnode *,
734 struct afs_server *, int);
735
31143d5d
DH		 736/*
737 * write.c
738 */
739extern int afs_set_page_dirty(struct page *);
740extern void afs_put_writeback(struct afs_writeback *);
15b4650e
NP		 741extern 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);
744extern 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);
31143d5d
DH		 747extern int afs_writepage(struct page *, struct writeback_control *);
748extern int afs_writepages(struct address_space *, struct writeback_control *);
31143d5d
DH		 749extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *);
750extern ssize_t afs_file_write(struct kiocb *, const struct iovec *,
751 unsigned long, loff_t);
752extern int afs_writeback_all(struct afs_vnode *);
02c24a82 753extern int afs_fsync(struct file *, loff_t, loff_t, int);
31143d5d
DH		 754
755
08e0e7c8
DH		 756/*****************************************************************************/
757/*
758 * debug tracing
759 */
760extern unsigned afs_debug;
761
762#define dbgprintk(FMT,...) \
ad16df84 763 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
08e0e7c8 764
530b6412
HH		 765#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
766#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
08e0e7c8
DH		 767#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
768
769
770#if defined(__KDEBUG)
771#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
772#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
773#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
774
775#elif defined(CONFIG_AFS_DEBUG)
776#define AFS_DEBUG_KENTER 0x01
777#define AFS_DEBUG_KLEAVE 0x02
778#define AFS_DEBUG_KDEBUG 0x04
779
780#define _enter(FMT,...) \
781do { \
782 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
783 kenter(FMT,##__VA_ARGS__); \
784} while (0)
785
786#define _leave(FMT,...) \
787do { \
788 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
789 kleave(FMT,##__VA_ARGS__); \
790} while (0)
791
792#define _debug(FMT,...) \
793do { \
794 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
795 kdebug(FMT,##__VA_ARGS__); \
796} while (0)
797
798#else
12fdff3f
DH		 799#define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
800#define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
801#define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
08e0e7c8
DH		 802#endif
803
804/*
805 * debug assertion checking
806 */
807#if 1 // defined(__KDEBUGALL)
808
809#define ASSERT(X) \
810do { \
811 if (unlikely(!(X))) { \
812 printk(KERN_ERR "\n"); \
813 printk(KERN_ERR "AFS: Assertion failed\n"); \
814 BUG(); \
815 } \
816} while(0)
817
818#define ASSERTCMP(X, OP, Y) \
819do { \
820 if (unlikely(!((X) OP (Y)))) { \
821 printk(KERN_ERR "\n"); \
822 printk(KERN_ERR "AFS: Assertion failed\n"); \
823 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
824 (unsigned long)(X), (unsigned long)(Y)); \
825 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
826 (unsigned long)(X), (unsigned long)(Y)); \
827 BUG(); \
828 } \
829} while(0)
830
416351f2
DH		 831#define ASSERTRANGE(L, OP1, N, OP2, H) \
832do { \
833 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \
834 printk(KERN_ERR "\n"); \
835 printk(KERN_ERR "AFS: Assertion failed\n"); \
836 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \
837 (unsigned long)(L), (unsigned long)(N), \
838 (unsigned long)(H)); \
839 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
840 (unsigned long)(L), (unsigned long)(N), \
841 (unsigned long)(H)); \
842 BUG(); \
843 } \
844} while(0)
845
08e0e7c8
DH		 846#define ASSERTIF(C, X) \
847do { \
848 if (unlikely((C) && !(X))) { \
849 printk(KERN_ERR "\n"); \
850 printk(KERN_ERR "AFS: Assertion failed\n"); \
851 BUG(); \
852 } \
853} while(0)
854
855#define ASSERTIFCMP(C, X, OP, Y) \
856do { \
857 if (unlikely((C) && !((X) OP (Y)))) { \
858 printk(KERN_ERR "\n"); \
859 printk(KERN_ERR "AFS: Assertion failed\n"); \
860 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
861 (unsigned long)(X), (unsigned long)(Y)); \
862 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
863 (unsigned long)(X), (unsigned long)(Y)); \
864 BUG(); \
865 } \
866} while(0)
867
868#else
869
870#define ASSERT(X) \
871do { \
872} while(0)
873
874#define ASSERTCMP(X, OP, Y) \
875do { \
876} while(0)
877
416351f2
DH		 878#define ASSERTRANGE(L, OP1, N, OP2, H) \
879do { \
880} while(0)
881
08e0e7c8
DH		 882#define ASSERTIF(C, X) \
883do { \
884} while(0)
885
886#define ASSERTIFCMP(C, X, OP, Y) \
887do { \
888} while(0)
889
890#endif /* __KDEBUGALL */
kernel source for telekom puls (alcatel/mediatek)