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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> | |
18 | #include "afs.h" | |
19 | #include "afs_vl.h" | |
20 | ||
21 | #define AFS_CELL_MAX_ADDRS 15 | |
22 | ||
23 | struct afs_call; | |
24 | ||
25 | typedef enum { | |
26 | AFS_VL_NEW, /* new, uninitialised record */ | |
27 | AFS_VL_CREATING, /* creating record */ | |
28 | AFS_VL_VALID, /* record is pending */ | |
29 | AFS_VL_NO_VOLUME, /* no such volume available */ | |
30 | AFS_VL_UPDATING, /* update in progress */ | |
31 | AFS_VL_VOLUME_DELETED, /* volume was deleted */ | |
32 | AFS_VL_UNCERTAIN, /* uncertain state (update failed) */ | |
33 | } __attribute__((packed)) afs_vlocation_state_t; | |
1da177e4 LT |
34 | |
35 | /* | |
08e0e7c8 | 36 | * definition of how to wait for the completion of an operation |
1da177e4 | 37 | */ |
08e0e7c8 DH |
38 | struct afs_wait_mode { |
39 | /* RxRPC received message notification */ | |
40 | void (*rx_wakeup)(struct afs_call *call); | |
1da177e4 | 41 | |
08e0e7c8 DH |
42 | /* synchronous call waiter and call dispatched notification */ |
43 | int (*wait)(struct afs_call *call); | |
44 | ||
45 | /* asynchronous call completion */ | |
46 | void (*async_complete)(void *reply, int error); | |
47 | }; | |
48 | ||
49 | extern const struct afs_wait_mode afs_sync_call; | |
50 | extern const struct afs_wait_mode afs_async_call; | |
51 | ||
52 | /* | |
53 | * a record of an in-progress RxRPC call | |
54 | */ | |
55 | struct afs_call { | |
56 | const struct afs_call_type *type; /* type of call */ | |
57 | const struct afs_wait_mode *wait_mode; /* completion wait mode */ | |
58 | wait_queue_head_t waitq; /* processes awaiting completion */ | |
59 | struct work_struct async_work; /* asynchronous work processor */ | |
60 | struct work_struct work; /* actual work processor */ | |
61 | struct sk_buff_head rx_queue; /* received packets */ | |
62 | struct rxrpc_call *rxcall; /* RxRPC call handle */ | |
63 | struct key *key; /* security for this call */ | |
64 | struct afs_server *server; /* server affected by incoming CM call */ | |
65 | void *request; /* request data (first part) */ | |
66 | void *request2; /* request data (second part) */ | |
67 | void *buffer; /* reply receive buffer */ | |
68 | void *reply; /* reply buffer (first part) */ | |
69 | void *reply2; /* reply buffer (second part) */ | |
70 | void *reply3; /* reply buffer (third part) */ | |
71 | enum { /* call state */ | |
72 | AFS_CALL_REQUESTING, /* request is being sent for outgoing call */ | |
73 | AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */ | |
74 | AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */ | |
75 | AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */ | |
76 | AFS_CALL_REPLYING, /* replying to incoming call */ | |
77 | AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */ | |
78 | AFS_CALL_COMPLETE, /* successfully completed */ | |
79 | AFS_CALL_BUSY, /* server was busy */ | |
80 | AFS_CALL_ABORTED, /* call was aborted */ | |
81 | AFS_CALL_ERROR, /* call failed due to error */ | |
82 | } state; | |
83 | int error; /* error code */ | |
84 | unsigned request_size; /* size of request data */ | |
85 | unsigned reply_max; /* maximum size of reply */ | |
86 | unsigned reply_size; /* current size of reply */ | |
87 | unsigned short offset; /* offset into received data store */ | |
88 | unsigned char unmarshall; /* unmarshalling phase */ | |
89 | bool incoming; /* T if incoming call */ | |
90 | u16 service_id; /* RxRPC service ID to call */ | |
91 | __be16 port; /* target UDP port */ | |
92 | __be32 operation_ID; /* operation ID for an incoming call */ | |
93 | u32 count; /* count for use in unmarshalling */ | |
94 | __be32 tmp; /* place to extract temporary data */ | |
95 | }; | |
96 | ||
97 | struct afs_call_type { | |
98 | /* deliver request or reply data to an call | |
99 | * - returning an error will cause the call to be aborted | |
100 | */ | |
101 | int (*deliver)(struct afs_call *call, struct sk_buff *skb, | |
102 | bool last); | |
103 | ||
104 | /* map an abort code to an error number */ | |
105 | int (*abort_to_error)(u32 abort_code); | |
106 | ||
107 | /* clean up a call */ | |
108 | void (*destructor)(struct afs_call *call); | |
109 | }; | |
110 | ||
111 | /* | |
112 | * AFS superblock private data | |
113 | * - there's one superblock per volume | |
114 | */ | |
115 | struct afs_super_info { | |
116 | struct afs_volume *volume; /* volume record */ | |
117 | char rwparent; /* T if parent is R/W AFS volume */ | |
118 | }; | |
1da177e4 | 119 | |
08e0e7c8 DH |
120 | static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
121 | { | |
122 | return sb->s_fs_info; | |
1da177e4 LT |
123 | } |
124 | ||
08e0e7c8 DH |
125 | extern struct file_system_type afs_fs_type; |
126 | ||
127 | /* | |
128 | * entry in the cached cell catalogue | |
129 | */ | |
130 | struct afs_cache_cell { | |
131 | char name[64]; /* cell name (padded with NULs) */ | |
132 | struct in_addr vl_servers[15]; /* cached cell VL servers */ | |
133 | }; | |
134 | ||
135 | /* | |
136 | * AFS cell record | |
137 | */ | |
138 | struct afs_cell { | |
139 | atomic_t usage; | |
140 | struct list_head link; /* main cell list link */ | |
141 | struct list_head proc_link; /* /proc cell list link */ | |
142 | struct proc_dir_entry *proc_dir; /* /proc dir for this cell */ | |
143 | #ifdef AFS_CACHING_SUPPORT | |
144 | struct cachefs_cookie *cache; /* caching cookie */ | |
145 | #endif | |
146 | ||
147 | /* server record management */ | |
148 | rwlock_t servers_lock; /* active server list lock */ | |
149 | struct list_head servers; /* active server list */ | |
150 | ||
151 | /* volume location record management */ | |
152 | struct rw_semaphore vl_sem; /* volume management serialisation semaphore */ | |
153 | struct list_head vl_list; /* cell's active VL record list */ | |
154 | spinlock_t vl_lock; /* vl_list lock */ | |
155 | unsigned short vl_naddrs; /* number of VL servers in addr list */ | |
156 | unsigned short vl_curr_svix; /* current server index */ | |
157 | struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */ | |
158 | ||
159 | char name[0]; /* cell name - must go last */ | |
160 | }; | |
161 | ||
162 | /* | |
163 | * entry in the cached volume location catalogue | |
164 | */ | |
165 | struct afs_cache_vlocation { | |
166 | uint8_t name[64 + 1]; /* volume name (lowercase, padded with NULs) */ | |
167 | uint8_t nservers; /* number of entries used in servers[] */ | |
168 | uint8_t vidmask; /* voltype mask for vid[] */ | |
169 | uint8_t srvtmask[8]; /* voltype masks for servers[] */ | |
170 | #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ | |
171 | #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ | |
172 | #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ | |
173 | ||
174 | afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */ | |
175 | struct in_addr servers[8]; /* fileserver addresses */ | |
176 | time_t rtime; /* last retrieval time */ | |
177 | }; | |
178 | ||
179 | /* | |
180 | * volume -> vnode hash table entry | |
181 | */ | |
182 | struct afs_cache_vhash { | |
183 | afs_voltype_t vtype; /* which volume variation */ | |
184 | uint8_t hash_bucket; /* which hash bucket this represents */ | |
185 | } __attribute__((packed)); | |
186 | ||
187 | /* | |
188 | * AFS volume location record | |
189 | */ | |
190 | struct afs_vlocation { | |
191 | atomic_t usage; | |
192 | time_t time_of_death; /* time at which put reduced usage to 0 */ | |
193 | struct list_head link; /* link in cell volume location list */ | |
194 | struct list_head grave; /* link in master graveyard list */ | |
195 | struct list_head update; /* link in master update list */ | |
196 | struct afs_cell *cell; /* cell to which volume belongs */ | |
197 | #ifdef AFS_CACHING_SUPPORT | |
198 | struct cachefs_cookie *cache; /* caching cookie */ | |
199 | #endif | |
200 | struct afs_cache_vlocation vldb; /* volume information DB record */ | |
201 | struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ | |
202 | wait_queue_head_t waitq; /* status change waitqueue */ | |
203 | time_t update_at; /* time at which record should be updated */ | |
204 | rwlock_t lock; /* access lock */ | |
205 | afs_vlocation_state_t state; /* volume location state */ | |
206 | unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ | |
207 | unsigned short upd_busy_cnt; /* EBUSY count during update */ | |
208 | bool valid; /* T if valid */ | |
209 | }; | |
210 | ||
211 | /* | |
212 | * AFS fileserver record | |
213 | */ | |
214 | struct afs_server { | |
215 | atomic_t usage; | |
216 | time_t time_of_death; /* time at which put reduced usage to 0 */ | |
217 | struct in_addr addr; /* server address */ | |
218 | struct afs_cell *cell; /* cell in which server resides */ | |
219 | struct list_head link; /* link in cell's server list */ | |
220 | struct list_head grave; /* link in master graveyard list */ | |
221 | struct rb_node master_rb; /* link in master by-addr tree */ | |
222 | struct rw_semaphore sem; /* access lock */ | |
223 | ||
224 | /* file service access */ | |
225 | struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */ | |
226 | unsigned long fs_act_jif; /* time at which last activity occurred */ | |
227 | unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ | |
228 | spinlock_t fs_lock; /* access lock */ | |
229 | int fs_state; /* 0 or reason FS currently marked dead (-errno) */ | |
230 | ||
231 | /* callback promise management */ | |
232 | struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */ | |
233 | struct delayed_work cb_updater; /* callback updater */ | |
234 | struct delayed_work cb_break_work; /* collected break dispatcher */ | |
235 | wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */ | |
236 | spinlock_t cb_lock; /* access lock */ | |
237 | struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */ | |
238 | atomic_t cb_break_n; /* number of pending breaks */ | |
239 | u8 cb_break_head; /* head of callback breaking ring */ | |
240 | u8 cb_break_tail; /* tail of callback breaking ring */ | |
241 | }; | |
242 | ||
243 | /* | |
244 | * AFS volume access record | |
245 | */ | |
246 | struct afs_volume { | |
247 | atomic_t usage; | |
248 | struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */ | |
249 | struct afs_vlocation *vlocation; /* volume location */ | |
250 | #ifdef AFS_CACHING_SUPPORT | |
251 | struct cachefs_cookie *cache; /* caching cookie */ | |
252 | #endif | |
253 | afs_volid_t vid; /* volume ID */ | |
254 | afs_voltype_t type; /* type of volume */ | |
255 | char type_force; /* force volume type (suppress R/O -> R/W) */ | |
256 | unsigned short nservers; /* number of server slots filled */ | |
257 | unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */ | |
258 | struct afs_server *servers[8]; /* servers on which volume resides (ordered) */ | |
259 | struct rw_semaphore server_sem; /* lock for accessing current server */ | |
260 | }; | |
261 | ||
262 | /* | |
263 | * vnode catalogue entry | |
264 | */ | |
265 | struct afs_cache_vnode { | |
266 | afs_vnodeid_t vnode_id; /* vnode ID */ | |
267 | unsigned vnode_unique; /* vnode ID uniquifier */ | |
268 | afs_dataversion_t data_version; /* data version */ | |
269 | }; | |
270 | ||
271 | /* | |
272 | * AFS inode private data | |
273 | */ | |
274 | struct afs_vnode { | |
275 | struct inode vfs_inode; /* the VFS's inode record */ | |
276 | ||
277 | struct afs_volume *volume; /* volume on which vnode resides */ | |
278 | struct afs_server *server; /* server currently supplying this file */ | |
279 | struct afs_fid fid; /* the file identifier for this inode */ | |
280 | struct afs_file_status status; /* AFS status info for this file */ | |
281 | #ifdef AFS_CACHING_SUPPORT | |
282 | struct cachefs_cookie *cache; /* caching cookie */ | |
283 | #endif | |
284 | ||
285 | wait_queue_head_t update_waitq; /* status fetch waitqueue */ | |
286 | unsigned update_cnt; /* number of outstanding ops that will update the | |
287 | * status */ | |
288 | spinlock_t lock; /* waitqueue/flags lock */ | |
289 | unsigned long flags; | |
290 | #define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */ | |
291 | #define AFS_VNODE_CHANGED 1 /* set if vnode's metadata changed */ | |
292 | #define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */ | |
293 | #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ | |
294 | #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ | |
295 | #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ | |
296 | #define AFS_VNODE_DIR_CHANGED 6 /* set if vnode's parent dir metadata changed */ | |
297 | #define AFS_VNODE_DIR_MODIFIED 7 /* set if vnode's parent dir data modified */ | |
298 | ||
299 | /* outstanding callback notification on this file */ | |
300 | struct rb_node server_rb; /* link in server->fs_vnodes */ | |
301 | struct rb_node cb_promise; /* link in server->cb_promises */ | |
302 | struct work_struct cb_broken_work; /* work to be done on callback break */ | |
303 | struct mutex cb_broken_lock; /* lock against multiple attempts to fix break */ | |
304 | // struct list_head cb_hash_link; /* link in master callback hash */ | |
305 | time_t cb_expires; /* time at which callback expires */ | |
306 | time_t cb_expires_at; /* time used to order cb_promise */ | |
307 | unsigned cb_version; /* callback version */ | |
308 | unsigned cb_expiry; /* callback expiry time */ | |
309 | afs_callback_type_t cb_type; /* type of callback */ | |
310 | bool cb_promised; /* true if promise still holds */ | |
311 | }; | |
312 | ||
313 | /*****************************************************************************/ | |
314 | /* | |
315 | * callback.c | |
316 | */ | |
317 | extern void afs_init_callback_state(struct afs_server *); | |
318 | extern void afs_broken_callback_work(struct work_struct *); | |
319 | extern void afs_break_callbacks(struct afs_server *, size_t, | |
320 | struct afs_callback[]); | |
321 | extern void afs_give_up_callback(struct afs_vnode *); | |
322 | extern void afs_dispatch_give_up_callbacks(struct work_struct *); | |
323 | extern void afs_flush_callback_breaks(struct afs_server *); | |
324 | extern int __init afs_callback_update_init(void); | |
325 | extern void __exit afs_callback_update_kill(void); | |
326 | ||
1da177e4 LT |
327 | /* |
328 | * cell.c | |
329 | */ | |
330 | extern struct rw_semaphore afs_proc_cells_sem; | |
331 | extern struct list_head afs_proc_cells; | |
332 | #ifdef AFS_CACHING_SUPPORT | |
333 | extern struct cachefs_index_def afs_cache_cell_index_def; | |
334 | #endif | |
335 | ||
08e0e7c8 DH |
336 | #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0) |
337 | extern int afs_cell_init(char *); | |
338 | extern struct afs_cell *afs_cell_create(const char *, char *); | |
339 | extern struct afs_cell *afs_cell_lookup(const char *, unsigned); | |
340 | extern struct afs_cell *afs_grab_cell(struct afs_cell *); | |
341 | extern void afs_put_cell(struct afs_cell *); | |
342 | extern void afs_cell_purge(void); | |
343 | ||
344 | /* | |
345 | * cmservice.c | |
346 | */ | |
347 | extern bool afs_cm_incoming_call(struct afs_call *); | |
348 | ||
1da177e4 LT |
349 | /* |
350 | * dir.c | |
351 | */ | |
754661f1 | 352 | extern const struct inode_operations afs_dir_inode_operations; |
4b6f5d20 | 353 | extern const struct file_operations afs_dir_file_operations; |
1da177e4 LT |
354 | |
355 | /* | |
356 | * file.c | |
357 | */ | |
f5e54d6e | 358 | extern const struct address_space_operations afs_fs_aops; |
754661f1 | 359 | extern const struct inode_operations afs_file_inode_operations; |
1da177e4 LT |
360 | |
361 | #ifdef AFS_CACHING_SUPPORT | |
ec26815a | 362 | extern int afs_cache_get_page_cookie(struct page *, struct cachefs_page **); |
1da177e4 LT |
363 | #endif |
364 | ||
08e0e7c8 DH |
365 | /* |
366 | * fsclient.c | |
367 | */ | |
368 | extern int afs_fs_fetch_file_status(struct afs_server *, | |
369 | struct afs_vnode *, | |
370 | struct afs_volsync *, | |
371 | const struct afs_wait_mode *); | |
372 | extern int afs_fs_give_up_callbacks(struct afs_server *, | |
373 | const struct afs_wait_mode *); | |
374 | extern int afs_fs_fetch_data(struct afs_server *, struct afs_vnode *, off_t, | |
375 | size_t, struct page *, struct afs_volsync *, | |
376 | const struct afs_wait_mode *); | |
377 | ||
1da177e4 LT |
378 | /* |
379 | * inode.c | |
380 | */ | |
08e0e7c8 | 381 | extern struct inode *afs_iget(struct super_block *, struct afs_fid *); |
ec26815a DH |
382 | extern int afs_inode_getattr(struct vfsmount *, struct dentry *, |
383 | struct kstat *); | |
384 | extern void afs_clear_inode(struct inode *); | |
1da177e4 LT |
385 | |
386 | /* | |
387 | * main.c | |
388 | */ | |
389 | #ifdef AFS_CACHING_SUPPORT | |
390 | extern struct cachefs_netfs afs_cache_netfs; | |
391 | #endif | |
392 | ||
08e0e7c8 DH |
393 | /* |
394 | * misc.c | |
395 | */ | |
396 | extern int afs_abort_to_error(u32); | |
397 | ||
1da177e4 LT |
398 | /* |
399 | * mntpt.c | |
400 | */ | |
754661f1 | 401 | extern const struct inode_operations afs_mntpt_inode_operations; |
4b6f5d20 | 402 | extern const struct file_operations afs_mntpt_file_operations; |
1da177e4 LT |
403 | extern unsigned long afs_mntpt_expiry_timeout; |
404 | ||
ec26815a | 405 | extern int afs_mntpt_check_symlink(struct afs_vnode *); |
08e0e7c8 DH |
406 | extern void afs_mntpt_kill_timer(void); |
407 | extern void afs_umount_begin(struct vfsmount *, int); | |
1da177e4 LT |
408 | |
409 | /* | |
410 | * super.c | |
411 | */ | |
412 | extern int afs_fs_init(void); | |
413 | extern void afs_fs_exit(void); | |
414 | ||
1da177e4 LT |
415 | /* |
416 | * proc.c | |
417 | */ | |
418 | extern int afs_proc_init(void); | |
419 | extern void afs_proc_cleanup(void); | |
ec26815a DH |
420 | extern int afs_proc_cell_setup(struct afs_cell *); |
421 | extern void afs_proc_cell_remove(struct afs_cell *); | |
1da177e4 | 422 | |
08e0e7c8 DH |
423 | /* |
424 | * rxrpc.c | |
425 | */ | |
426 | extern int afs_open_socket(void); | |
427 | extern void afs_close_socket(void); | |
428 | extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t, | |
429 | const struct afs_wait_mode *); | |
430 | extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *, | |
431 | size_t, size_t); | |
432 | extern void afs_flat_call_destructor(struct afs_call *); | |
433 | extern void afs_transfer_reply(struct afs_call *, struct sk_buff *); | |
434 | extern void afs_send_empty_reply(struct afs_call *); | |
435 | extern int afs_extract_data(struct afs_call *, struct sk_buff *, bool, void *, | |
436 | size_t); | |
437 | ||
438 | /* | |
439 | * server.c | |
440 | */ | |
441 | extern spinlock_t afs_server_peer_lock; | |
442 | ||
443 | #define afs_get_server(S) do { atomic_inc(&(S)->usage); } while(0) | |
444 | ||
445 | extern struct afs_server *afs_lookup_server(struct afs_cell *, | |
446 | const struct in_addr *); | |
447 | extern struct afs_server *afs_find_server(const struct in_addr *); | |
448 | extern void afs_put_server(struct afs_server *); | |
449 | extern void __exit afs_purge_servers(void); | |
450 | ||
451 | /* | |
452 | * vlclient.c | |
453 | */ | |
454 | #ifdef AFS_CACHING_SUPPORT | |
455 | extern struct cachefs_index_def afs_vlocation_cache_index_def; | |
456 | #endif | |
457 | ||
458 | extern int afs_vl_get_entry_by_name(struct in_addr *, const char *, | |
459 | struct afs_cache_vlocation *, | |
460 | const struct afs_wait_mode *); | |
461 | extern int afs_vl_get_entry_by_id(struct in_addr *, afs_volid_t, afs_voltype_t, | |
462 | struct afs_cache_vlocation *, | |
463 | const struct afs_wait_mode *); | |
464 | ||
465 | /* | |
466 | * vlocation.c | |
467 | */ | |
468 | #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0) | |
469 | ||
470 | extern int __init afs_vlocation_update_init(void); | |
471 | extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *, | |
472 | const char *, size_t); | |
473 | extern void afs_put_vlocation(struct afs_vlocation *); | |
474 | extern void __exit afs_vlocation_purge(void); | |
475 | ||
476 | /* | |
477 | * vnode.c | |
478 | */ | |
479 | #ifdef AFS_CACHING_SUPPORT | |
480 | extern struct cachefs_index_def afs_vnode_cache_index_def; | |
481 | #endif | |
482 | ||
483 | extern struct afs_timer_ops afs_vnode_cb_timed_out_ops; | |
484 | ||
485 | static inline struct afs_vnode *AFS_FS_I(struct inode *inode) | |
486 | { | |
487 | return container_of(inode, struct afs_vnode, vfs_inode); | |
488 | } | |
489 | ||
490 | static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) | |
491 | { | |
492 | return &vnode->vfs_inode; | |
493 | } | |
494 | ||
495 | extern int afs_vnode_fetch_status(struct afs_vnode *); | |
496 | extern int afs_vnode_fetch_data(struct afs_vnode *vnode, off_t, size_t, | |
497 | struct page *); | |
498 | ||
499 | /* | |
500 | * volume.c | |
501 | */ | |
502 | #ifdef AFS_CACHING_SUPPORT | |
503 | extern struct cachefs_index_def afs_volume_cache_index_def; | |
504 | #endif | |
505 | ||
506 | #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0) | |
507 | ||
508 | extern void afs_put_volume(struct afs_volume *); | |
509 | extern struct afs_volume *afs_volume_lookup(const char *, struct afs_cell *, | |
510 | int); | |
511 | extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *); | |
512 | extern int afs_volume_release_fileserver(struct afs_vnode *, | |
513 | struct afs_server *, int); | |
514 | ||
515 | /*****************************************************************************/ | |
516 | /* | |
517 | * debug tracing | |
518 | */ | |
519 | extern unsigned afs_debug; | |
520 | ||
521 | #define dbgprintk(FMT,...) \ | |
522 | printk("[%x%-6.6s] "FMT"\n", smp_processor_id(), current->comm ,##__VA_ARGS__) | |
523 | ||
524 | /* make sure we maintain the format strings, even when debugging is disabled */ | |
525 | static inline __attribute__((format(printf,1,2))) | |
526 | void _dbprintk(const char *fmt, ...) | |
527 | { | |
528 | } | |
529 | ||
530 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__) | |
531 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__) | |
532 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) | |
533 | ||
534 | ||
535 | #if defined(__KDEBUG) | |
536 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
537 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
538 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
539 | ||
540 | #elif defined(CONFIG_AFS_DEBUG) | |
541 | #define AFS_DEBUG_KENTER 0x01 | |
542 | #define AFS_DEBUG_KLEAVE 0x02 | |
543 | #define AFS_DEBUG_KDEBUG 0x04 | |
544 | ||
545 | #define _enter(FMT,...) \ | |
546 | do { \ | |
547 | if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ | |
548 | kenter(FMT,##__VA_ARGS__); \ | |
549 | } while (0) | |
550 | ||
551 | #define _leave(FMT,...) \ | |
552 | do { \ | |
553 | if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ | |
554 | kleave(FMT,##__VA_ARGS__); \ | |
555 | } while (0) | |
556 | ||
557 | #define _debug(FMT,...) \ | |
558 | do { \ | |
559 | if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ | |
560 | kdebug(FMT,##__VA_ARGS__); \ | |
561 | } while (0) | |
562 | ||
563 | #else | |
564 | #define _enter(FMT,...) _dbprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__) | |
565 | #define _leave(FMT,...) _dbprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__) | |
566 | #define _debug(FMT,...) _dbprintk(" "FMT ,##__VA_ARGS__) | |
567 | #endif | |
568 | ||
569 | /* | |
570 | * debug assertion checking | |
571 | */ | |
572 | #if 1 // defined(__KDEBUGALL) | |
573 | ||
574 | #define ASSERT(X) \ | |
575 | do { \ | |
576 | if (unlikely(!(X))) { \ | |
577 | printk(KERN_ERR "\n"); \ | |
578 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
579 | BUG(); \ | |
580 | } \ | |
581 | } while(0) | |
582 | ||
583 | #define ASSERTCMP(X, OP, Y) \ | |
584 | do { \ | |
585 | if (unlikely(!((X) OP (Y)))) { \ | |
586 | printk(KERN_ERR "\n"); \ | |
587 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
588 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
589 | (unsigned long)(X), (unsigned long)(Y)); \ | |
590 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
591 | (unsigned long)(X), (unsigned long)(Y)); \ | |
592 | BUG(); \ | |
593 | } \ | |
594 | } while(0) | |
595 | ||
596 | #define ASSERTIF(C, X) \ | |
597 | do { \ | |
598 | if (unlikely((C) && !(X))) { \ | |
599 | printk(KERN_ERR "\n"); \ | |
600 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
601 | BUG(); \ | |
602 | } \ | |
603 | } while(0) | |
604 | ||
605 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
606 | do { \ | |
607 | if (unlikely((C) && !((X) OP (Y)))) { \ | |
608 | printk(KERN_ERR "\n"); \ | |
609 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
610 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
611 | (unsigned long)(X), (unsigned long)(Y)); \ | |
612 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
613 | (unsigned long)(X), (unsigned long)(Y)); \ | |
614 | BUG(); \ | |
615 | } \ | |
616 | } while(0) | |
617 | ||
618 | #else | |
619 | ||
620 | #define ASSERT(X) \ | |
621 | do { \ | |
622 | } while(0) | |
623 | ||
624 | #define ASSERTCMP(X, OP, Y) \ | |
625 | do { \ | |
626 | } while(0) | |
627 | ||
628 | #define ASSERTIF(C, X) \ | |
629 | do { \ | |
630 | } while(0) | |
631 | ||
632 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
633 | do { \ | |
634 | } while(0) | |
635 | ||
636 | #endif /* __KDEBUGALL */ |