Commit | Line | Data |
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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> | |
00d3b7a4 | 18 | #include <linux/key.h> |
08e0e7c8 DH |
19 | #include "afs.h" |
20 | #include "afs_vl.h" | |
21 | ||
22 | #define AFS_CELL_MAX_ADDRS 15 | |
23 | ||
24 | struct afs_call; | |
25 | ||
26 | typedef enum { | |
27 | AFS_VL_NEW, /* new, uninitialised record */ | |
28 | AFS_VL_CREATING, /* creating record */ | |
29 | AFS_VL_VALID, /* record is pending */ | |
30 | AFS_VL_NO_VOLUME, /* no such volume available */ | |
31 | AFS_VL_UPDATING, /* update in progress */ | |
32 | AFS_VL_VOLUME_DELETED, /* volume was deleted */ | |
33 | AFS_VL_UNCERTAIN, /* uncertain state (update failed) */ | |
34 | } __attribute__((packed)) afs_vlocation_state_t; | |
1da177e4 | 35 | |
00d3b7a4 DH |
36 | struct afs_mount_params { |
37 | bool rwpath; /* T if the parent should be considered R/W */ | |
38 | bool force; /* T to force cell type */ | |
39 | afs_voltype_t type; /* type of volume requested */ | |
40 | int volnamesz; /* size of volume name */ | |
41 | const char *volname; /* name of volume to mount */ | |
42 | struct afs_cell *cell; /* cell in which to find volume */ | |
43 | struct afs_volume *volume; /* volume record */ | |
44 | struct key *key; /* key to use for secure mounting */ | |
45 | }; | |
46 | ||
1da177e4 | 47 | /* |
08e0e7c8 | 48 | * definition of how to wait for the completion of an operation |
1da177e4 | 49 | */ |
08e0e7c8 DH |
50 | struct afs_wait_mode { |
51 | /* RxRPC received message notification */ | |
52 | void (*rx_wakeup)(struct afs_call *call); | |
1da177e4 | 53 | |
08e0e7c8 DH |
54 | /* synchronous call waiter and call dispatched notification */ |
55 | int (*wait)(struct afs_call *call); | |
56 | ||
57 | /* asynchronous call completion */ | |
58 | void (*async_complete)(void *reply, int error); | |
59 | }; | |
60 | ||
61 | extern const struct afs_wait_mode afs_sync_call; | |
62 | extern const struct afs_wait_mode afs_async_call; | |
63 | ||
64 | /* | |
65 | * a record of an in-progress RxRPC call | |
66 | */ | |
67 | struct afs_call { | |
68 | const struct afs_call_type *type; /* type of call */ | |
69 | const struct afs_wait_mode *wait_mode; /* completion wait mode */ | |
70 | wait_queue_head_t waitq; /* processes awaiting completion */ | |
71 | struct work_struct async_work; /* asynchronous work processor */ | |
72 | struct work_struct work; /* actual work processor */ | |
73 | struct sk_buff_head rx_queue; /* received packets */ | |
74 | struct rxrpc_call *rxcall; /* RxRPC call handle */ | |
75 | struct key *key; /* security for this call */ | |
76 | struct afs_server *server; /* server affected by incoming CM call */ | |
77 | void *request; /* request data (first part) */ | |
78 | void *request2; /* request data (second part) */ | |
79 | void *buffer; /* reply receive buffer */ | |
80 | void *reply; /* reply buffer (first part) */ | |
81 | void *reply2; /* reply buffer (second part) */ | |
82 | void *reply3; /* reply buffer (third part) */ | |
260a9803 | 83 | void *reply4; /* reply buffer (fourth part) */ |
08e0e7c8 DH |
84 | enum { /* call state */ |
85 | AFS_CALL_REQUESTING, /* request is being sent for outgoing call */ | |
86 | AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */ | |
87 | AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */ | |
88 | AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */ | |
89 | AFS_CALL_REPLYING, /* replying to incoming call */ | |
90 | AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */ | |
91 | AFS_CALL_COMPLETE, /* successfully completed */ | |
92 | AFS_CALL_BUSY, /* server was busy */ | |
93 | AFS_CALL_ABORTED, /* call was aborted */ | |
94 | AFS_CALL_ERROR, /* call failed due to error */ | |
95 | } state; | |
96 | int error; /* error code */ | |
97 | unsigned request_size; /* size of request data */ | |
98 | unsigned reply_max; /* maximum size of reply */ | |
99 | unsigned reply_size; /* current size of reply */ | |
100 | unsigned short offset; /* offset into received data store */ | |
101 | unsigned char unmarshall; /* unmarshalling phase */ | |
102 | bool incoming; /* T if incoming call */ | |
103 | u16 service_id; /* RxRPC service ID to call */ | |
104 | __be16 port; /* target UDP port */ | |
105 | __be32 operation_ID; /* operation ID for an incoming call */ | |
106 | u32 count; /* count for use in unmarshalling */ | |
107 | __be32 tmp; /* place to extract temporary data */ | |
108 | }; | |
109 | ||
110 | struct afs_call_type { | |
00d3b7a4 DH |
111 | const char *name; |
112 | ||
08e0e7c8 DH |
113 | /* deliver request or reply data to an call |
114 | * - returning an error will cause the call to be aborted | |
115 | */ | |
116 | int (*deliver)(struct afs_call *call, struct sk_buff *skb, | |
117 | bool last); | |
118 | ||
119 | /* map an abort code to an error number */ | |
120 | int (*abort_to_error)(u32 abort_code); | |
121 | ||
122 | /* clean up a call */ | |
123 | void (*destructor)(struct afs_call *call); | |
124 | }; | |
125 | ||
126 | /* | |
127 | * AFS superblock private data | |
128 | * - there's one superblock per volume | |
129 | */ | |
130 | struct afs_super_info { | |
131 | struct afs_volume *volume; /* volume record */ | |
132 | char rwparent; /* T if parent is R/W AFS volume */ | |
133 | }; | |
1da177e4 | 134 | |
08e0e7c8 DH |
135 | static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
136 | { | |
137 | return sb->s_fs_info; | |
1da177e4 LT |
138 | } |
139 | ||
08e0e7c8 DH |
140 | extern struct file_system_type afs_fs_type; |
141 | ||
142 | /* | |
143 | * entry in the cached cell catalogue | |
144 | */ | |
145 | struct afs_cache_cell { | |
00d3b7a4 DH |
146 | char name[AFS_MAXCELLNAME]; /* cell name (padded with NULs) */ |
147 | struct in_addr vl_servers[15]; /* cached cell VL servers */ | |
08e0e7c8 DH |
148 | }; |
149 | ||
150 | /* | |
151 | * AFS cell record | |
152 | */ | |
153 | struct afs_cell { | |
154 | atomic_t usage; | |
155 | struct list_head link; /* main cell list link */ | |
00d3b7a4 | 156 | struct key *anonymous_key; /* anonymous user key for this cell */ |
08e0e7c8 DH |
157 | struct list_head proc_link; /* /proc cell list link */ |
158 | struct proc_dir_entry *proc_dir; /* /proc dir for this cell */ | |
159 | #ifdef AFS_CACHING_SUPPORT | |
160 | struct cachefs_cookie *cache; /* caching cookie */ | |
161 | #endif | |
162 | ||
163 | /* server record management */ | |
164 | rwlock_t servers_lock; /* active server list lock */ | |
165 | struct list_head servers; /* active server list */ | |
166 | ||
167 | /* volume location record management */ | |
168 | struct rw_semaphore vl_sem; /* volume management serialisation semaphore */ | |
169 | struct list_head vl_list; /* cell's active VL record list */ | |
170 | spinlock_t vl_lock; /* vl_list lock */ | |
171 | unsigned short vl_naddrs; /* number of VL servers in addr list */ | |
172 | unsigned short vl_curr_svix; /* current server index */ | |
173 | struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */ | |
174 | ||
175 | char name[0]; /* cell name - must go last */ | |
176 | }; | |
177 | ||
178 | /* | |
179 | * entry in the cached volume location catalogue | |
180 | */ | |
181 | struct afs_cache_vlocation { | |
00d3b7a4 DH |
182 | /* volume name (lowercase, padded with NULs) */ |
183 | uint8_t name[AFS_MAXVOLNAME + 1]; | |
184 | ||
08e0e7c8 DH |
185 | uint8_t nservers; /* number of entries used in servers[] */ |
186 | uint8_t vidmask; /* voltype mask for vid[] */ | |
187 | uint8_t srvtmask[8]; /* voltype masks for servers[] */ | |
188 | #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ | |
189 | #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ | |
190 | #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ | |
191 | ||
192 | afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */ | |
193 | struct in_addr servers[8]; /* fileserver addresses */ | |
194 | time_t rtime; /* last retrieval time */ | |
195 | }; | |
196 | ||
197 | /* | |
198 | * volume -> vnode hash table entry | |
199 | */ | |
200 | struct afs_cache_vhash { | |
201 | afs_voltype_t vtype; /* which volume variation */ | |
202 | uint8_t hash_bucket; /* which hash bucket this represents */ | |
203 | } __attribute__((packed)); | |
204 | ||
205 | /* | |
206 | * AFS volume location record | |
207 | */ | |
208 | struct afs_vlocation { | |
209 | atomic_t usage; | |
210 | time_t time_of_death; /* time at which put reduced usage to 0 */ | |
211 | struct list_head link; /* link in cell volume location list */ | |
212 | struct list_head grave; /* link in master graveyard list */ | |
213 | struct list_head update; /* link in master update list */ | |
214 | struct afs_cell *cell; /* cell to which volume belongs */ | |
215 | #ifdef AFS_CACHING_SUPPORT | |
216 | struct cachefs_cookie *cache; /* caching cookie */ | |
217 | #endif | |
218 | struct afs_cache_vlocation vldb; /* volume information DB record */ | |
219 | struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ | |
220 | wait_queue_head_t waitq; /* status change waitqueue */ | |
221 | time_t update_at; /* time at which record should be updated */ | |
222 | rwlock_t lock; /* access lock */ | |
223 | afs_vlocation_state_t state; /* volume location state */ | |
224 | unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ | |
225 | unsigned short upd_busy_cnt; /* EBUSY count during update */ | |
226 | bool valid; /* T if valid */ | |
227 | }; | |
228 | ||
229 | /* | |
230 | * AFS fileserver record | |
231 | */ | |
232 | struct afs_server { | |
233 | atomic_t usage; | |
234 | time_t time_of_death; /* time at which put reduced usage to 0 */ | |
235 | struct in_addr addr; /* server address */ | |
236 | struct afs_cell *cell; /* cell in which server resides */ | |
237 | struct list_head link; /* link in cell's server list */ | |
238 | struct list_head grave; /* link in master graveyard list */ | |
239 | struct rb_node master_rb; /* link in master by-addr tree */ | |
240 | struct rw_semaphore sem; /* access lock */ | |
241 | ||
242 | /* file service access */ | |
243 | struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */ | |
244 | unsigned long fs_act_jif; /* time at which last activity occurred */ | |
245 | unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ | |
246 | spinlock_t fs_lock; /* access lock */ | |
247 | int fs_state; /* 0 or reason FS currently marked dead (-errno) */ | |
248 | ||
249 | /* callback promise management */ | |
250 | struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */ | |
251 | struct delayed_work cb_updater; /* callback updater */ | |
252 | struct delayed_work cb_break_work; /* collected break dispatcher */ | |
253 | wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */ | |
254 | spinlock_t cb_lock; /* access lock */ | |
255 | struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */ | |
256 | atomic_t cb_break_n; /* number of pending breaks */ | |
257 | u8 cb_break_head; /* head of callback breaking ring */ | |
258 | u8 cb_break_tail; /* tail of callback breaking ring */ | |
259 | }; | |
260 | ||
261 | /* | |
262 | * AFS volume access record | |
263 | */ | |
264 | struct afs_volume { | |
265 | atomic_t usage; | |
266 | struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */ | |
267 | struct afs_vlocation *vlocation; /* volume location */ | |
268 | #ifdef AFS_CACHING_SUPPORT | |
269 | struct cachefs_cookie *cache; /* caching cookie */ | |
270 | #endif | |
271 | afs_volid_t vid; /* volume ID */ | |
272 | afs_voltype_t type; /* type of volume */ | |
273 | char type_force; /* force volume type (suppress R/O -> R/W) */ | |
274 | unsigned short nservers; /* number of server slots filled */ | |
275 | unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */ | |
276 | struct afs_server *servers[8]; /* servers on which volume resides (ordered) */ | |
277 | struct rw_semaphore server_sem; /* lock for accessing current server */ | |
278 | }; | |
279 | ||
280 | /* | |
281 | * vnode catalogue entry | |
282 | */ | |
283 | struct afs_cache_vnode { | |
284 | afs_vnodeid_t vnode_id; /* vnode ID */ | |
285 | unsigned vnode_unique; /* vnode ID uniquifier */ | |
286 | afs_dataversion_t data_version; /* data version */ | |
287 | }; | |
288 | ||
289 | /* | |
290 | * AFS inode private data | |
291 | */ | |
292 | struct afs_vnode { | |
293 | struct inode vfs_inode; /* the VFS's inode record */ | |
294 | ||
295 | struct afs_volume *volume; /* volume on which vnode resides */ | |
296 | struct afs_server *server; /* server currently supplying this file */ | |
297 | struct afs_fid fid; /* the file identifier for this inode */ | |
298 | struct afs_file_status status; /* AFS status info for this file */ | |
299 | #ifdef AFS_CACHING_SUPPORT | |
300 | struct cachefs_cookie *cache; /* caching cookie */ | |
301 | #endif | |
00d3b7a4 DH |
302 | struct afs_permits *permits; /* cache of permits so far obtained */ |
303 | struct mutex permits_lock; /* lock for altering permits list */ | |
260a9803 | 304 | struct mutex validate_lock; /* lock for validating this vnode */ |
08e0e7c8 | 305 | wait_queue_head_t update_waitq; /* status fetch waitqueue */ |
260a9803 | 306 | int update_cnt; /* number of outstanding ops that will update the |
08e0e7c8 DH |
307 | * status */ |
308 | spinlock_t lock; /* waitqueue/flags lock */ | |
309 | unsigned long flags; | |
310 | #define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */ | |
260a9803 | 311 | #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
08e0e7c8 DH |
312 | #define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */ |
313 | #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ | |
314 | #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ | |
315 | #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ | |
08e0e7c8 | 316 | |
00d3b7a4 DH |
317 | long acl_order; /* ACL check count (callback break count) */ |
318 | ||
08e0e7c8 DH |
319 | /* outstanding callback notification on this file */ |
320 | struct rb_node server_rb; /* link in server->fs_vnodes */ | |
321 | struct rb_node cb_promise; /* link in server->cb_promises */ | |
322 | struct work_struct cb_broken_work; /* work to be done on callback break */ | |
08e0e7c8 DH |
323 | time_t cb_expires; /* time at which callback expires */ |
324 | time_t cb_expires_at; /* time used to order cb_promise */ | |
325 | unsigned cb_version; /* callback version */ | |
326 | unsigned cb_expiry; /* callback expiry time */ | |
327 | afs_callback_type_t cb_type; /* type of callback */ | |
328 | bool cb_promised; /* true if promise still holds */ | |
329 | }; | |
330 | ||
00d3b7a4 DH |
331 | /* |
332 | * cached security record for one user's attempt to access a vnode | |
333 | */ | |
334 | struct afs_permit { | |
335 | struct key *key; /* RxRPC ticket holding a security context */ | |
336 | afs_access_t access_mask; /* access mask for this key */ | |
337 | }; | |
338 | ||
339 | /* | |
340 | * cache of security records from attempts to access a vnode | |
341 | */ | |
342 | struct afs_permits { | |
343 | struct rcu_head rcu; /* disposal procedure */ | |
344 | int count; /* number of records */ | |
345 | struct afs_permit permits[0]; /* the permits so far examined */ | |
346 | }; | |
347 | ||
b908fe6b DH |
348 | /* |
349 | * record of one of a system's set of network interfaces | |
350 | */ | |
351 | struct afs_interface { | |
352 | unsigned index; /* interface index */ | |
353 | struct in_addr address; /* IPv4 address bound to interface */ | |
354 | struct in_addr netmask; /* netmask applied to address */ | |
355 | unsigned mtu; /* MTU of interface */ | |
356 | }; | |
357 | ||
358 | /* | |
359 | * UUID definition [internet draft] | |
360 | * - the timestamp is a 60-bit value, split 32/16/12, and goes in 100ns | |
361 | * increments since midnight 15th October 1582 | |
362 | * - add AFS_UUID_TO_UNIX_TIME to convert unix time in 100ns units to UUID | |
363 | * time | |
364 | * - the clock sequence is a 14-bit counter to avoid duplicate times | |
365 | */ | |
366 | struct afs_uuid { | |
367 | u32 time_low; /* low part of timestamp */ | |
368 | u16 time_mid; /* mid part of timestamp */ | |
369 | u16 time_hi_and_version; /* high part of timestamp and version */ | |
370 | #define AFS_UUID_TO_UNIX_TIME 0x01b21dd213814000 | |
371 | #define AFS_UUID_TIMEHI_MASK 0x0fff | |
372 | #define AFS_UUID_VERSION_TIME 0x1000 /* time-based UUID */ | |
373 | #define AFS_UUID_VERSION_NAME 0x3000 /* name-based UUID */ | |
374 | #define AFS_UUID_VERSION_RANDOM 0x4000 /* (pseudo-)random generated UUID */ | |
375 | u8 clock_seq_hi_and_reserved; /* clock seq hi and variant */ | |
376 | #define AFS_UUID_CLOCKHI_MASK 0x3f | |
377 | #define AFS_UUID_VARIANT_STD 0x80 | |
378 | u8 clock_seq_low; /* clock seq low */ | |
379 | u8 node[6]; /* spatially unique node ID (MAC addr) */ | |
380 | }; | |
381 | ||
08e0e7c8 DH |
382 | /*****************************************************************************/ |
383 | /* | |
384 | * callback.c | |
385 | */ | |
386 | extern void afs_init_callback_state(struct afs_server *); | |
387 | extern void afs_broken_callback_work(struct work_struct *); | |
388 | extern void afs_break_callbacks(struct afs_server *, size_t, | |
389 | struct afs_callback[]); | |
260a9803 | 390 | extern void afs_discard_callback_on_delete(struct afs_vnode *); |
08e0e7c8 DH |
391 | extern void afs_give_up_callback(struct afs_vnode *); |
392 | extern void afs_dispatch_give_up_callbacks(struct work_struct *); | |
393 | extern void afs_flush_callback_breaks(struct afs_server *); | |
394 | extern int __init afs_callback_update_init(void); | |
395 | extern void __exit afs_callback_update_kill(void); | |
396 | ||
1da177e4 LT |
397 | /* |
398 | * cell.c | |
399 | */ | |
400 | extern struct rw_semaphore afs_proc_cells_sem; | |
401 | extern struct list_head afs_proc_cells; | |
402 | #ifdef AFS_CACHING_SUPPORT | |
403 | extern struct cachefs_index_def afs_cache_cell_index_def; | |
404 | #endif | |
405 | ||
08e0e7c8 DH |
406 | #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0) |
407 | extern int afs_cell_init(char *); | |
408 | extern struct afs_cell *afs_cell_create(const char *, char *); | |
409 | extern struct afs_cell *afs_cell_lookup(const char *, unsigned); | |
410 | extern struct afs_cell *afs_grab_cell(struct afs_cell *); | |
411 | extern void afs_put_cell(struct afs_cell *); | |
412 | extern void afs_cell_purge(void); | |
413 | ||
414 | /* | |
415 | * cmservice.c | |
416 | */ | |
417 | extern bool afs_cm_incoming_call(struct afs_call *); | |
418 | ||
1da177e4 LT |
419 | /* |
420 | * dir.c | |
421 | */ | |
754661f1 | 422 | extern const struct inode_operations afs_dir_inode_operations; |
4b6f5d20 | 423 | extern const struct file_operations afs_dir_file_operations; |
1da177e4 | 424 | |
00d3b7a4 DH |
425 | extern int afs_permission(struct inode *, int, struct nameidata *); |
426 | ||
1da177e4 LT |
427 | /* |
428 | * file.c | |
429 | */ | |
f5e54d6e | 430 | extern const struct address_space_operations afs_fs_aops; |
754661f1 | 431 | extern const struct inode_operations afs_file_inode_operations; |
00d3b7a4 DH |
432 | extern const struct file_operations afs_file_operations; |
433 | ||
434 | extern int afs_open(struct inode *, struct file *); | |
435 | extern int afs_release(struct inode *, struct file *); | |
1da177e4 LT |
436 | |
437 | #ifdef AFS_CACHING_SUPPORT | |
ec26815a | 438 | extern int afs_cache_get_page_cookie(struct page *, struct cachefs_page **); |
1da177e4 LT |
439 | #endif |
440 | ||
08e0e7c8 DH |
441 | /* |
442 | * fsclient.c | |
443 | */ | |
00d3b7a4 DH |
444 | extern int afs_fs_fetch_file_status(struct afs_server *, struct key *, |
445 | struct afs_vnode *, struct afs_volsync *, | |
08e0e7c8 DH |
446 | const struct afs_wait_mode *); |
447 | extern int afs_fs_give_up_callbacks(struct afs_server *, | |
448 | const struct afs_wait_mode *); | |
00d3b7a4 DH |
449 | extern int afs_fs_fetch_data(struct afs_server *, struct key *, |
450 | struct afs_vnode *, off_t, size_t, struct page *, | |
08e0e7c8 | 451 | const struct afs_wait_mode *); |
260a9803 DH |
452 | extern int afs_fs_create(struct afs_server *, struct key *, |
453 | struct afs_vnode *, const char *, umode_t, | |
454 | struct afs_fid *, struct afs_file_status *, | |
455 | struct afs_callback *, | |
456 | const struct afs_wait_mode *); | |
457 | extern int afs_fs_remove(struct afs_server *, struct key *, | |
458 | struct afs_vnode *, const char *, bool, | |
459 | const struct afs_wait_mode *); | |
460 | extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *, | |
461 | struct afs_vnode *, const char *, | |
462 | const struct afs_wait_mode *); | |
463 | extern int afs_fs_symlink(struct afs_server *, struct key *, | |
464 | struct afs_vnode *, const char *, const char *, | |
465 | struct afs_fid *, struct afs_file_status *, | |
466 | const struct afs_wait_mode *); | |
467 | extern int afs_fs_rename(struct afs_server *, struct key *, | |
468 | struct afs_vnode *, const char *, | |
469 | struct afs_vnode *, const char *, | |
470 | const struct afs_wait_mode *); | |
08e0e7c8 | 471 | |
1da177e4 LT |
472 | /* |
473 | * inode.c | |
474 | */ | |
00d3b7a4 | 475 | extern struct inode *afs_iget(struct super_block *, struct key *, |
260a9803 DH |
476 | struct afs_fid *, struct afs_file_status *, |
477 | struct afs_callback *); | |
478 | extern int afs_validate(struct afs_vnode *, struct key *); | |
ec26815a DH |
479 | extern int afs_inode_getattr(struct vfsmount *, struct dentry *, |
480 | struct kstat *); | |
00d3b7a4 | 481 | extern void afs_zap_permits(struct rcu_head *); |
ec26815a | 482 | extern void afs_clear_inode(struct inode *); |
1da177e4 LT |
483 | |
484 | /* | |
485 | * main.c | |
486 | */ | |
b908fe6b | 487 | extern struct afs_uuid afs_uuid; |
1da177e4 LT |
488 | #ifdef AFS_CACHING_SUPPORT |
489 | extern struct cachefs_netfs afs_cache_netfs; | |
490 | #endif | |
491 | ||
08e0e7c8 DH |
492 | /* |
493 | * misc.c | |
494 | */ | |
495 | extern int afs_abort_to_error(u32); | |
496 | ||
1da177e4 LT |
497 | /* |
498 | * mntpt.c | |
499 | */ | |
754661f1 | 500 | extern const struct inode_operations afs_mntpt_inode_operations; |
4b6f5d20 | 501 | extern const struct file_operations afs_mntpt_file_operations; |
1da177e4 LT |
502 | extern unsigned long afs_mntpt_expiry_timeout; |
503 | ||
00d3b7a4 | 504 | extern int afs_mntpt_check_symlink(struct afs_vnode *, struct key *); |
08e0e7c8 DH |
505 | extern void afs_mntpt_kill_timer(void); |
506 | extern void afs_umount_begin(struct vfsmount *, int); | |
1da177e4 | 507 | |
1da177e4 LT |
508 | /* |
509 | * proc.c | |
510 | */ | |
511 | extern int afs_proc_init(void); | |
512 | extern void afs_proc_cleanup(void); | |
ec26815a DH |
513 | extern int afs_proc_cell_setup(struct afs_cell *); |
514 | extern void afs_proc_cell_remove(struct afs_cell *); | |
1da177e4 | 515 | |
08e0e7c8 DH |
516 | /* |
517 | * rxrpc.c | |
518 | */ | |
519 | extern int afs_open_socket(void); | |
520 | extern void afs_close_socket(void); | |
521 | extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t, | |
522 | const struct afs_wait_mode *); | |
523 | extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *, | |
524 | size_t, size_t); | |
525 | extern void afs_flat_call_destructor(struct afs_call *); | |
526 | extern void afs_transfer_reply(struct afs_call *, struct sk_buff *); | |
527 | extern void afs_send_empty_reply(struct afs_call *); | |
b908fe6b | 528 | extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); |
08e0e7c8 DH |
529 | extern int afs_extract_data(struct afs_call *, struct sk_buff *, bool, void *, |
530 | size_t); | |
531 | ||
00d3b7a4 DH |
532 | /* |
533 | * security.c | |
534 | */ | |
535 | extern void afs_clear_permits(struct afs_vnode *); | |
536 | extern void afs_cache_permit(struct afs_vnode *, struct key *, long); | |
537 | extern struct key *afs_request_key(struct afs_cell *); | |
538 | extern int afs_permission(struct inode *, int, struct nameidata *); | |
539 | ||
08e0e7c8 DH |
540 | /* |
541 | * server.c | |
542 | */ | |
543 | extern spinlock_t afs_server_peer_lock; | |
544 | ||
260a9803 DH |
545 | #define afs_get_server(S) \ |
546 | do { \ | |
547 | _debug("GET SERVER %d", atomic_read(&(S)->usage)); \ | |
548 | atomic_inc(&(S)->usage); \ | |
549 | } while(0) | |
08e0e7c8 DH |
550 | |
551 | extern struct afs_server *afs_lookup_server(struct afs_cell *, | |
552 | const struct in_addr *); | |
553 | extern struct afs_server *afs_find_server(const struct in_addr *); | |
554 | extern void afs_put_server(struct afs_server *); | |
555 | extern void __exit afs_purge_servers(void); | |
556 | ||
00d3b7a4 DH |
557 | /* |
558 | * super.c | |
559 | */ | |
560 | extern int afs_fs_init(void); | |
561 | extern void afs_fs_exit(void); | |
562 | ||
b908fe6b DH |
563 | /* |
564 | * use-rtnetlink.c | |
565 | */ | |
566 | extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); | |
567 | extern int afs_get_MAC_address(u8 [6]); | |
568 | ||
08e0e7c8 DH |
569 | /* |
570 | * vlclient.c | |
571 | */ | |
572 | #ifdef AFS_CACHING_SUPPORT | |
573 | extern struct cachefs_index_def afs_vlocation_cache_index_def; | |
574 | #endif | |
575 | ||
00d3b7a4 DH |
576 | extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *, |
577 | const char *, struct afs_cache_vlocation *, | |
08e0e7c8 | 578 | const struct afs_wait_mode *); |
00d3b7a4 DH |
579 | extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *, |
580 | afs_volid_t, afs_voltype_t, | |
08e0e7c8 DH |
581 | struct afs_cache_vlocation *, |
582 | const struct afs_wait_mode *); | |
583 | ||
584 | /* | |
585 | * vlocation.c | |
586 | */ | |
587 | #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0) | |
588 | ||
589 | extern int __init afs_vlocation_update_init(void); | |
590 | extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *, | |
00d3b7a4 | 591 | struct key *, |
08e0e7c8 DH |
592 | const char *, size_t); |
593 | extern void afs_put_vlocation(struct afs_vlocation *); | |
594 | extern void __exit afs_vlocation_purge(void); | |
595 | ||
596 | /* | |
597 | * vnode.c | |
598 | */ | |
599 | #ifdef AFS_CACHING_SUPPORT | |
600 | extern struct cachefs_index_def afs_vnode_cache_index_def; | |
601 | #endif | |
602 | ||
603 | extern struct afs_timer_ops afs_vnode_cb_timed_out_ops; | |
604 | ||
605 | static inline struct afs_vnode *AFS_FS_I(struct inode *inode) | |
606 | { | |
607 | return container_of(inode, struct afs_vnode, vfs_inode); | |
608 | } | |
609 | ||
610 | static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) | |
611 | { | |
612 | return &vnode->vfs_inode; | |
613 | } | |
614 | ||
260a9803 DH |
615 | extern void afs_vnode_finalise_status_update(struct afs_vnode *, |
616 | struct afs_server *); | |
00d3b7a4 DH |
617 | extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *, |
618 | struct key *); | |
619 | extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *, | |
620 | off_t, size_t, struct page *); | |
260a9803 DH |
621 | extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *, |
622 | umode_t, struct afs_fid *, struct afs_file_status *, | |
623 | struct afs_callback *, struct afs_server **); | |
624 | extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *, | |
625 | bool); | |
626 | extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *, | |
627 | const char *); | |
628 | extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *, | |
629 | const char *, struct afs_fid *, | |
630 | struct afs_file_status *, struct afs_server **); | |
631 | extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *, | |
632 | struct key *, const char *, const char *); | |
08e0e7c8 DH |
633 | |
634 | /* | |
635 | * volume.c | |
636 | */ | |
637 | #ifdef AFS_CACHING_SUPPORT | |
638 | extern struct cachefs_index_def afs_volume_cache_index_def; | |
639 | #endif | |
640 | ||
641 | #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0) | |
642 | ||
643 | extern void afs_put_volume(struct afs_volume *); | |
00d3b7a4 | 644 | extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *); |
08e0e7c8 DH |
645 | extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *); |
646 | extern int afs_volume_release_fileserver(struct afs_vnode *, | |
647 | struct afs_server *, int); | |
648 | ||
649 | /*****************************************************************************/ | |
650 | /* | |
651 | * debug tracing | |
652 | */ | |
653 | extern unsigned afs_debug; | |
654 | ||
655 | #define dbgprintk(FMT,...) \ | |
656 | printk("[%x%-6.6s] "FMT"\n", smp_processor_id(), current->comm ,##__VA_ARGS__) | |
657 | ||
658 | /* make sure we maintain the format strings, even when debugging is disabled */ | |
659 | static inline __attribute__((format(printf,1,2))) | |
660 | void _dbprintk(const char *fmt, ...) | |
661 | { | |
662 | } | |
663 | ||
664 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__) | |
665 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__) | |
666 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) | |
667 | ||
668 | ||
669 | #if defined(__KDEBUG) | |
670 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
671 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
672 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
673 | ||
674 | #elif defined(CONFIG_AFS_DEBUG) | |
675 | #define AFS_DEBUG_KENTER 0x01 | |
676 | #define AFS_DEBUG_KLEAVE 0x02 | |
677 | #define AFS_DEBUG_KDEBUG 0x04 | |
678 | ||
679 | #define _enter(FMT,...) \ | |
680 | do { \ | |
681 | if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ | |
682 | kenter(FMT,##__VA_ARGS__); \ | |
683 | } while (0) | |
684 | ||
685 | #define _leave(FMT,...) \ | |
686 | do { \ | |
687 | if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ | |
688 | kleave(FMT,##__VA_ARGS__); \ | |
689 | } while (0) | |
690 | ||
691 | #define _debug(FMT,...) \ | |
692 | do { \ | |
693 | if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ | |
694 | kdebug(FMT,##__VA_ARGS__); \ | |
695 | } while (0) | |
696 | ||
697 | #else | |
698 | #define _enter(FMT,...) _dbprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__) | |
699 | #define _leave(FMT,...) _dbprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__) | |
700 | #define _debug(FMT,...) _dbprintk(" "FMT ,##__VA_ARGS__) | |
701 | #endif | |
702 | ||
703 | /* | |
704 | * debug assertion checking | |
705 | */ | |
706 | #if 1 // defined(__KDEBUGALL) | |
707 | ||
708 | #define ASSERT(X) \ | |
709 | do { \ | |
710 | if (unlikely(!(X))) { \ | |
711 | printk(KERN_ERR "\n"); \ | |
712 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
713 | BUG(); \ | |
714 | } \ | |
715 | } while(0) | |
716 | ||
717 | #define ASSERTCMP(X, OP, Y) \ | |
718 | do { \ | |
719 | if (unlikely(!((X) OP (Y)))) { \ | |
720 | printk(KERN_ERR "\n"); \ | |
721 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
722 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
723 | (unsigned long)(X), (unsigned long)(Y)); \ | |
724 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
725 | (unsigned long)(X), (unsigned long)(Y)); \ | |
726 | BUG(); \ | |
727 | } \ | |
728 | } while(0) | |
729 | ||
730 | #define ASSERTIF(C, X) \ | |
731 | do { \ | |
732 | if (unlikely((C) && !(X))) { \ | |
733 | printk(KERN_ERR "\n"); \ | |
734 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
735 | BUG(); \ | |
736 | } \ | |
737 | } while(0) | |
738 | ||
739 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
740 | do { \ | |
741 | if (unlikely((C) && !((X) OP (Y)))) { \ | |
742 | printk(KERN_ERR "\n"); \ | |
743 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
744 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
745 | (unsigned long)(X), (unsigned long)(Y)); \ | |
746 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
747 | (unsigned long)(X), (unsigned long)(Y)); \ | |
748 | BUG(); \ | |
749 | } \ | |
750 | } while(0) | |
751 | ||
752 | #else | |
753 | ||
754 | #define ASSERT(X) \ | |
755 | do { \ | |
756 | } while(0) | |
757 | ||
758 | #define ASSERTCMP(X, OP, Y) \ | |
759 | do { \ | |
760 | } while(0) | |
761 | ||
762 | #define ASSERTIF(C, X) \ | |
763 | do { \ | |
764 | } while(0) | |
765 | ||
766 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
767 | do { \ | |
768 | } while(0) | |
769 | ||
770 | #endif /* __KDEBUGALL */ |