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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> |
e8edc6e0 | 19 | #include <linux/workqueue.h> |
08e0e7c8 DH |
20 | #include "afs.h" |
21 | #include "afs_vl.h" | |
22 | ||
23 | #define AFS_CELL_MAX_ADDRS 15 | |
24 | ||
31143d5d | 25 | struct pagevec; |
08e0e7c8 DH |
26 | struct afs_call; |
27 | ||
28 | typedef enum { | |
29 | AFS_VL_NEW, /* new, uninitialised record */ | |
30 | AFS_VL_CREATING, /* creating record */ | |
31 | AFS_VL_VALID, /* record is pending */ | |
32 | AFS_VL_NO_VOLUME, /* no such volume available */ | |
33 | AFS_VL_UPDATING, /* update in progress */ | |
34 | AFS_VL_VOLUME_DELETED, /* volume was deleted */ | |
35 | AFS_VL_UNCERTAIN, /* uncertain state (update failed) */ | |
36 | } __attribute__((packed)) afs_vlocation_state_t; | |
1da177e4 | 37 | |
00d3b7a4 DH |
38 | struct afs_mount_params { |
39 | bool rwpath; /* T if the parent should be considered R/W */ | |
40 | bool force; /* T to force cell type */ | |
41 | afs_voltype_t type; /* type of volume requested */ | |
42 | int volnamesz; /* size of volume name */ | |
43 | const char *volname; /* name of volume to mount */ | |
44 | struct afs_cell *cell; /* cell in which to find volume */ | |
45 | struct afs_volume *volume; /* volume record */ | |
46 | struct key *key; /* key to use for secure mounting */ | |
47 | }; | |
48 | ||
1da177e4 | 49 | /* |
08e0e7c8 | 50 | * definition of how to wait for the completion of an operation |
1da177e4 | 51 | */ |
08e0e7c8 DH |
52 | struct afs_wait_mode { |
53 | /* RxRPC received message notification */ | |
54 | void (*rx_wakeup)(struct afs_call *call); | |
1da177e4 | 55 | |
08e0e7c8 DH |
56 | /* synchronous call waiter and call dispatched notification */ |
57 | int (*wait)(struct afs_call *call); | |
58 | ||
59 | /* asynchronous call completion */ | |
60 | void (*async_complete)(void *reply, int error); | |
61 | }; | |
62 | ||
63 | extern const struct afs_wait_mode afs_sync_call; | |
64 | extern const struct afs_wait_mode afs_async_call; | |
65 | ||
66 | /* | |
67 | * a record of an in-progress RxRPC call | |
68 | */ | |
69 | struct afs_call { | |
70 | const struct afs_call_type *type; /* type of call */ | |
71 | const struct afs_wait_mode *wait_mode; /* completion wait mode */ | |
72 | wait_queue_head_t waitq; /* processes awaiting completion */ | |
73 | struct work_struct async_work; /* asynchronous work processor */ | |
74 | struct work_struct work; /* actual work processor */ | |
75 | struct sk_buff_head rx_queue; /* received packets */ | |
76 | struct rxrpc_call *rxcall; /* RxRPC call handle */ | |
77 | struct key *key; /* security for this call */ | |
78 | struct afs_server *server; /* server affected by incoming CM call */ | |
79 | void *request; /* request data (first part) */ | |
31143d5d DH |
80 | struct address_space *mapping; /* page set */ |
81 | struct afs_writeback *wb; /* writeback being performed */ | |
08e0e7c8 DH |
82 | void *buffer; /* reply receive buffer */ |
83 | void *reply; /* reply buffer (first part) */ | |
84 | void *reply2; /* reply buffer (second part) */ | |
85 | void *reply3; /* reply buffer (third part) */ | |
260a9803 | 86 | void *reply4; /* reply buffer (fourth part) */ |
31143d5d DH |
87 | pgoff_t first; /* first page in mapping to deal with */ |
88 | pgoff_t last; /* last page in mapping to deal with */ | |
08e0e7c8 DH |
89 | enum { /* call state */ |
90 | AFS_CALL_REQUESTING, /* request is being sent for outgoing call */ | |
91 | AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */ | |
92 | AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */ | |
93 | AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */ | |
94 | AFS_CALL_REPLYING, /* replying to incoming call */ | |
95 | AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */ | |
96 | AFS_CALL_COMPLETE, /* successfully completed */ | |
97 | AFS_CALL_BUSY, /* server was busy */ | |
98 | AFS_CALL_ABORTED, /* call was aborted */ | |
99 | AFS_CALL_ERROR, /* call failed due to error */ | |
100 | } state; | |
101 | int error; /* error code */ | |
102 | unsigned request_size; /* size of request data */ | |
103 | unsigned reply_max; /* maximum size of reply */ | |
104 | unsigned reply_size; /* current size of reply */ | |
31143d5d DH |
105 | unsigned first_offset; /* offset into mapping[first] */ |
106 | unsigned last_to; /* amount of mapping[last] */ | |
08e0e7c8 DH |
107 | unsigned short offset; /* offset into received data store */ |
108 | unsigned char unmarshall; /* unmarshalling phase */ | |
109 | bool incoming; /* T if incoming call */ | |
31143d5d | 110 | bool send_pages; /* T if data from mapping should be sent */ |
08e0e7c8 DH |
111 | u16 service_id; /* RxRPC service ID to call */ |
112 | __be16 port; /* target UDP port */ | |
113 | __be32 operation_ID; /* operation ID for an incoming call */ | |
114 | u32 count; /* count for use in unmarshalling */ | |
115 | __be32 tmp; /* place to extract temporary data */ | |
31143d5d | 116 | afs_dataversion_t store_version; /* updated version expected from store */ |
08e0e7c8 DH |
117 | }; |
118 | ||
119 | struct afs_call_type { | |
00d3b7a4 DH |
120 | const char *name; |
121 | ||
08e0e7c8 DH |
122 | /* deliver request or reply data to an call |
123 | * - returning an error will cause the call to be aborted | |
124 | */ | |
125 | int (*deliver)(struct afs_call *call, struct sk_buff *skb, | |
126 | bool last); | |
127 | ||
128 | /* map an abort code to an error number */ | |
129 | int (*abort_to_error)(u32 abort_code); | |
130 | ||
131 | /* clean up a call */ | |
132 | void (*destructor)(struct afs_call *call); | |
133 | }; | |
134 | ||
31143d5d DH |
135 | /* |
136 | * record of an outstanding writeback on a vnode | |
137 | */ | |
138 | struct afs_writeback { | |
139 | struct list_head link; /* link in vnode->writebacks */ | |
140 | struct work_struct writer; /* work item to perform the writeback */ | |
141 | struct afs_vnode *vnode; /* vnode to which this write applies */ | |
142 | struct key *key; /* owner of this write */ | |
143 | wait_queue_head_t waitq; /* completion and ready wait queue */ | |
144 | pgoff_t first; /* first page in batch */ | |
145 | pgoff_t point; /* last page in current store op */ | |
146 | pgoff_t last; /* last page in batch (inclusive) */ | |
147 | unsigned offset_first; /* offset into first page of start of write */ | |
148 | unsigned to_last; /* offset into last page of end of write */ | |
149 | int num_conflicts; /* count of conflicting writes in list */ | |
150 | int usage; | |
151 | bool conflicts; /* T if has dependent conflicts */ | |
152 | enum { | |
153 | AFS_WBACK_SYNCING, /* synchronisation being performed */ | |
154 | AFS_WBACK_PENDING, /* write pending */ | |
155 | AFS_WBACK_CONFLICTING, /* conflicting writes posted */ | |
156 | AFS_WBACK_WRITING, /* writing back */ | |
157 | AFS_WBACK_COMPLETE /* the writeback record has been unlinked */ | |
158 | } state __attribute__((packed)); | |
159 | }; | |
160 | ||
08e0e7c8 DH |
161 | /* |
162 | * AFS superblock private data | |
163 | * - there's one superblock per volume | |
164 | */ | |
165 | struct afs_super_info { | |
166 | struct afs_volume *volume; /* volume record */ | |
167 | char rwparent; /* T if parent is R/W AFS volume */ | |
168 | }; | |
1da177e4 | 169 | |
08e0e7c8 DH |
170 | static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
171 | { | |
172 | return sb->s_fs_info; | |
1da177e4 LT |
173 | } |
174 | ||
08e0e7c8 DH |
175 | extern struct file_system_type afs_fs_type; |
176 | ||
177 | /* | |
178 | * entry in the cached cell catalogue | |
179 | */ | |
180 | struct afs_cache_cell { | |
00d3b7a4 DH |
181 | char name[AFS_MAXCELLNAME]; /* cell name (padded with NULs) */ |
182 | struct in_addr vl_servers[15]; /* cached cell VL servers */ | |
08e0e7c8 DH |
183 | }; |
184 | ||
185 | /* | |
186 | * AFS cell record | |
187 | */ | |
188 | struct afs_cell { | |
189 | atomic_t usage; | |
190 | struct list_head link; /* main cell list link */ | |
00d3b7a4 | 191 | struct key *anonymous_key; /* anonymous user key for this cell */ |
08e0e7c8 DH |
192 | struct list_head proc_link; /* /proc cell list link */ |
193 | struct proc_dir_entry *proc_dir; /* /proc dir for this cell */ | |
194 | #ifdef AFS_CACHING_SUPPORT | |
195 | struct cachefs_cookie *cache; /* caching cookie */ | |
196 | #endif | |
197 | ||
198 | /* server record management */ | |
199 | rwlock_t servers_lock; /* active server list lock */ | |
200 | struct list_head servers; /* active server list */ | |
201 | ||
202 | /* volume location record management */ | |
203 | struct rw_semaphore vl_sem; /* volume management serialisation semaphore */ | |
204 | struct list_head vl_list; /* cell's active VL record list */ | |
205 | spinlock_t vl_lock; /* vl_list lock */ | |
206 | unsigned short vl_naddrs; /* number of VL servers in addr list */ | |
207 | unsigned short vl_curr_svix; /* current server index */ | |
208 | struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */ | |
209 | ||
210 | char name[0]; /* cell name - must go last */ | |
211 | }; | |
212 | ||
213 | /* | |
214 | * entry in the cached volume location catalogue | |
215 | */ | |
216 | struct afs_cache_vlocation { | |
00d3b7a4 DH |
217 | /* volume name (lowercase, padded with NULs) */ |
218 | uint8_t name[AFS_MAXVOLNAME + 1]; | |
219 | ||
08e0e7c8 DH |
220 | uint8_t nservers; /* number of entries used in servers[] */ |
221 | uint8_t vidmask; /* voltype mask for vid[] */ | |
222 | uint8_t srvtmask[8]; /* voltype masks for servers[] */ | |
223 | #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ | |
224 | #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ | |
225 | #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ | |
226 | ||
227 | afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */ | |
228 | struct in_addr servers[8]; /* fileserver addresses */ | |
229 | time_t rtime; /* last retrieval time */ | |
230 | }; | |
231 | ||
232 | /* | |
233 | * volume -> vnode hash table entry | |
234 | */ | |
235 | struct afs_cache_vhash { | |
236 | afs_voltype_t vtype; /* which volume variation */ | |
237 | uint8_t hash_bucket; /* which hash bucket this represents */ | |
238 | } __attribute__((packed)); | |
239 | ||
240 | /* | |
241 | * AFS volume location record | |
242 | */ | |
243 | struct afs_vlocation { | |
244 | atomic_t usage; | |
245 | time_t time_of_death; /* time at which put reduced usage to 0 */ | |
246 | struct list_head link; /* link in cell volume location list */ | |
247 | struct list_head grave; /* link in master graveyard list */ | |
248 | struct list_head update; /* link in master update list */ | |
249 | struct afs_cell *cell; /* cell to which volume belongs */ | |
250 | #ifdef AFS_CACHING_SUPPORT | |
251 | struct cachefs_cookie *cache; /* caching cookie */ | |
252 | #endif | |
253 | struct afs_cache_vlocation vldb; /* volume information DB record */ | |
254 | struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ | |
255 | wait_queue_head_t waitq; /* status change waitqueue */ | |
256 | time_t update_at; /* time at which record should be updated */ | |
39bf0949 | 257 | spinlock_t lock; /* access lock */ |
08e0e7c8 DH |
258 | afs_vlocation_state_t state; /* volume location state */ |
259 | unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ | |
260 | unsigned short upd_busy_cnt; /* EBUSY count during update */ | |
261 | bool valid; /* T if valid */ | |
262 | }; | |
263 | ||
264 | /* | |
265 | * AFS fileserver record | |
266 | */ | |
267 | struct afs_server { | |
268 | atomic_t usage; | |
269 | time_t time_of_death; /* time at which put reduced usage to 0 */ | |
270 | struct in_addr addr; /* server address */ | |
271 | struct afs_cell *cell; /* cell in which server resides */ | |
272 | struct list_head link; /* link in cell's server list */ | |
273 | struct list_head grave; /* link in master graveyard list */ | |
274 | struct rb_node master_rb; /* link in master by-addr tree */ | |
275 | struct rw_semaphore sem; /* access lock */ | |
276 | ||
277 | /* file service access */ | |
278 | struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */ | |
279 | unsigned long fs_act_jif; /* time at which last activity occurred */ | |
280 | unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ | |
281 | spinlock_t fs_lock; /* access lock */ | |
282 | int fs_state; /* 0 or reason FS currently marked dead (-errno) */ | |
283 | ||
284 | /* callback promise management */ | |
285 | struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */ | |
286 | struct delayed_work cb_updater; /* callback updater */ | |
287 | struct delayed_work cb_break_work; /* collected break dispatcher */ | |
288 | wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */ | |
289 | spinlock_t cb_lock; /* access lock */ | |
290 | struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */ | |
291 | atomic_t cb_break_n; /* number of pending breaks */ | |
292 | u8 cb_break_head; /* head of callback breaking ring */ | |
293 | u8 cb_break_tail; /* tail of callback breaking ring */ | |
294 | }; | |
295 | ||
296 | /* | |
297 | * AFS volume access record | |
298 | */ | |
299 | struct afs_volume { | |
300 | atomic_t usage; | |
301 | struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */ | |
302 | struct afs_vlocation *vlocation; /* volume location */ | |
303 | #ifdef AFS_CACHING_SUPPORT | |
304 | struct cachefs_cookie *cache; /* caching cookie */ | |
305 | #endif | |
306 | afs_volid_t vid; /* volume ID */ | |
307 | afs_voltype_t type; /* type of volume */ | |
308 | char type_force; /* force volume type (suppress R/O -> R/W) */ | |
309 | unsigned short nservers; /* number of server slots filled */ | |
310 | unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */ | |
311 | struct afs_server *servers[8]; /* servers on which volume resides (ordered) */ | |
312 | struct rw_semaphore server_sem; /* lock for accessing current server */ | |
313 | }; | |
314 | ||
315 | /* | |
316 | * vnode catalogue entry | |
317 | */ | |
318 | struct afs_cache_vnode { | |
319 | afs_vnodeid_t vnode_id; /* vnode ID */ | |
320 | unsigned vnode_unique; /* vnode ID uniquifier */ | |
321 | afs_dataversion_t data_version; /* data version */ | |
322 | }; | |
323 | ||
324 | /* | |
325 | * AFS inode private data | |
326 | */ | |
327 | struct afs_vnode { | |
328 | struct inode vfs_inode; /* the VFS's inode record */ | |
329 | ||
330 | struct afs_volume *volume; /* volume on which vnode resides */ | |
331 | struct afs_server *server; /* server currently supplying this file */ | |
332 | struct afs_fid fid; /* the file identifier for this inode */ | |
333 | struct afs_file_status status; /* AFS status info for this file */ | |
334 | #ifdef AFS_CACHING_SUPPORT | |
335 | struct cachefs_cookie *cache; /* caching cookie */ | |
336 | #endif | |
00d3b7a4 DH |
337 | struct afs_permits *permits; /* cache of permits so far obtained */ |
338 | struct mutex permits_lock; /* lock for altering permits list */ | |
260a9803 | 339 | struct mutex validate_lock; /* lock for validating this vnode */ |
08e0e7c8 | 340 | wait_queue_head_t update_waitq; /* status fetch waitqueue */ |
260a9803 | 341 | int update_cnt; /* number of outstanding ops that will update the |
08e0e7c8 | 342 | * status */ |
31143d5d | 343 | spinlock_t writeback_lock; /* lock for writebacks */ |
08e0e7c8 DH |
344 | spinlock_t lock; /* waitqueue/flags lock */ |
345 | unsigned long flags; | |
346 | #define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */ | |
260a9803 | 347 | #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
08e0e7c8 DH |
348 | #define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */ |
349 | #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ | |
350 | #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ | |
351 | #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ | |
08e0e7c8 | 352 | |
00d3b7a4 DH |
353 | long acl_order; /* ACL check count (callback break count) */ |
354 | ||
31143d5d DH |
355 | struct list_head writebacks; /* alterations in pagecache that need writing */ |
356 | ||
08e0e7c8 DH |
357 | /* outstanding callback notification on this file */ |
358 | struct rb_node server_rb; /* link in server->fs_vnodes */ | |
359 | struct rb_node cb_promise; /* link in server->cb_promises */ | |
360 | struct work_struct cb_broken_work; /* work to be done on callback break */ | |
08e0e7c8 DH |
361 | time_t cb_expires; /* time at which callback expires */ |
362 | time_t cb_expires_at; /* time used to order cb_promise */ | |
363 | unsigned cb_version; /* callback version */ | |
364 | unsigned cb_expiry; /* callback expiry time */ | |
365 | afs_callback_type_t cb_type; /* type of callback */ | |
366 | bool cb_promised; /* true if promise still holds */ | |
367 | }; | |
368 | ||
00d3b7a4 DH |
369 | /* |
370 | * cached security record for one user's attempt to access a vnode | |
371 | */ | |
372 | struct afs_permit { | |
373 | struct key *key; /* RxRPC ticket holding a security context */ | |
374 | afs_access_t access_mask; /* access mask for this key */ | |
375 | }; | |
376 | ||
377 | /* | |
378 | * cache of security records from attempts to access a vnode | |
379 | */ | |
380 | struct afs_permits { | |
381 | struct rcu_head rcu; /* disposal procedure */ | |
382 | int count; /* number of records */ | |
383 | struct afs_permit permits[0]; /* the permits so far examined */ | |
384 | }; | |
385 | ||
b908fe6b DH |
386 | /* |
387 | * record of one of a system's set of network interfaces | |
388 | */ | |
389 | struct afs_interface { | |
b908fe6b DH |
390 | struct in_addr address; /* IPv4 address bound to interface */ |
391 | struct in_addr netmask; /* netmask applied to address */ | |
392 | unsigned mtu; /* MTU of interface */ | |
393 | }; | |
394 | ||
395 | /* | |
396 | * UUID definition [internet draft] | |
397 | * - the timestamp is a 60-bit value, split 32/16/12, and goes in 100ns | |
398 | * increments since midnight 15th October 1582 | |
399 | * - add AFS_UUID_TO_UNIX_TIME to convert unix time in 100ns units to UUID | |
400 | * time | |
401 | * - the clock sequence is a 14-bit counter to avoid duplicate times | |
402 | */ | |
403 | struct afs_uuid { | |
404 | u32 time_low; /* low part of timestamp */ | |
405 | u16 time_mid; /* mid part of timestamp */ | |
406 | u16 time_hi_and_version; /* high part of timestamp and version */ | |
b1bdb691 | 407 | #define AFS_UUID_TO_UNIX_TIME 0x01b21dd213814000ULL |
b908fe6b DH |
408 | #define AFS_UUID_TIMEHI_MASK 0x0fff |
409 | #define AFS_UUID_VERSION_TIME 0x1000 /* time-based UUID */ | |
410 | #define AFS_UUID_VERSION_NAME 0x3000 /* name-based UUID */ | |
411 | #define AFS_UUID_VERSION_RANDOM 0x4000 /* (pseudo-)random generated UUID */ | |
412 | u8 clock_seq_hi_and_reserved; /* clock seq hi and variant */ | |
413 | #define AFS_UUID_CLOCKHI_MASK 0x3f | |
414 | #define AFS_UUID_VARIANT_STD 0x80 | |
415 | u8 clock_seq_low; /* clock seq low */ | |
416 | u8 node[6]; /* spatially unique node ID (MAC addr) */ | |
417 | }; | |
418 | ||
08e0e7c8 DH |
419 | /*****************************************************************************/ |
420 | /* | |
421 | * callback.c | |
422 | */ | |
423 | extern void afs_init_callback_state(struct afs_server *); | |
424 | extern void afs_broken_callback_work(struct work_struct *); | |
425 | extern void afs_break_callbacks(struct afs_server *, size_t, | |
426 | struct afs_callback[]); | |
260a9803 | 427 | extern void afs_discard_callback_on_delete(struct afs_vnode *); |
08e0e7c8 DH |
428 | extern void afs_give_up_callback(struct afs_vnode *); |
429 | extern void afs_dispatch_give_up_callbacks(struct work_struct *); | |
430 | extern void afs_flush_callback_breaks(struct afs_server *); | |
431 | extern int __init afs_callback_update_init(void); | |
fbb3fcba | 432 | extern void afs_callback_update_kill(void); |
08e0e7c8 | 433 | |
1da177e4 LT |
434 | /* |
435 | * cell.c | |
436 | */ | |
437 | extern struct rw_semaphore afs_proc_cells_sem; | |
438 | extern struct list_head afs_proc_cells; | |
439 | #ifdef AFS_CACHING_SUPPORT | |
440 | extern struct cachefs_index_def afs_cache_cell_index_def; | |
441 | #endif | |
442 | ||
08e0e7c8 DH |
443 | #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0) |
444 | extern int afs_cell_init(char *); | |
445 | extern struct afs_cell *afs_cell_create(const char *, char *); | |
446 | extern struct afs_cell *afs_cell_lookup(const char *, unsigned); | |
447 | extern struct afs_cell *afs_grab_cell(struct afs_cell *); | |
448 | extern void afs_put_cell(struct afs_cell *); | |
449 | extern void afs_cell_purge(void); | |
450 | ||
451 | /* | |
452 | * cmservice.c | |
453 | */ | |
454 | extern bool afs_cm_incoming_call(struct afs_call *); | |
455 | ||
1da177e4 LT |
456 | /* |
457 | * dir.c | |
458 | */ | |
754661f1 | 459 | extern const struct inode_operations afs_dir_inode_operations; |
4b6f5d20 | 460 | extern const struct file_operations afs_dir_file_operations; |
1da177e4 | 461 | |
00d3b7a4 DH |
462 | extern int afs_permission(struct inode *, int, struct nameidata *); |
463 | ||
1da177e4 LT |
464 | /* |
465 | * file.c | |
466 | */ | |
f5e54d6e | 467 | extern const struct address_space_operations afs_fs_aops; |
754661f1 | 468 | extern const struct inode_operations afs_file_inode_operations; |
00d3b7a4 DH |
469 | extern const struct file_operations afs_file_operations; |
470 | ||
471 | extern int afs_open(struct inode *, struct file *); | |
472 | extern int afs_release(struct inode *, struct file *); | |
1da177e4 | 473 | |
08e0e7c8 DH |
474 | /* |
475 | * fsclient.c | |
476 | */ | |
00d3b7a4 DH |
477 | extern int afs_fs_fetch_file_status(struct afs_server *, struct key *, |
478 | struct afs_vnode *, struct afs_volsync *, | |
08e0e7c8 DH |
479 | const struct afs_wait_mode *); |
480 | extern int afs_fs_give_up_callbacks(struct afs_server *, | |
481 | const struct afs_wait_mode *); | |
00d3b7a4 DH |
482 | extern int afs_fs_fetch_data(struct afs_server *, struct key *, |
483 | struct afs_vnode *, off_t, size_t, struct page *, | |
08e0e7c8 | 484 | const struct afs_wait_mode *); |
260a9803 DH |
485 | extern int afs_fs_create(struct afs_server *, struct key *, |
486 | struct afs_vnode *, const char *, umode_t, | |
487 | struct afs_fid *, struct afs_file_status *, | |
488 | struct afs_callback *, | |
489 | const struct afs_wait_mode *); | |
490 | extern int afs_fs_remove(struct afs_server *, struct key *, | |
491 | struct afs_vnode *, const char *, bool, | |
492 | const struct afs_wait_mode *); | |
493 | extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *, | |
494 | struct afs_vnode *, const char *, | |
495 | const struct afs_wait_mode *); | |
496 | extern int afs_fs_symlink(struct afs_server *, struct key *, | |
497 | struct afs_vnode *, const char *, const char *, | |
498 | struct afs_fid *, struct afs_file_status *, | |
499 | const struct afs_wait_mode *); | |
500 | extern int afs_fs_rename(struct afs_server *, struct key *, | |
501 | struct afs_vnode *, const char *, | |
502 | struct afs_vnode *, const char *, | |
503 | const struct afs_wait_mode *); | |
31143d5d DH |
504 | extern int afs_fs_store_data(struct afs_server *, struct afs_writeback *, |
505 | pgoff_t, pgoff_t, unsigned, unsigned, | |
506 | const struct afs_wait_mode *); | |
507 | extern int afs_fs_setattr(struct afs_server *, struct key *, | |
508 | struct afs_vnode *, struct iattr *, | |
509 | const struct afs_wait_mode *); | |
45222b9e DH |
510 | extern int afs_fs_get_volume_status(struct afs_server *, struct key *, |
511 | struct afs_vnode *, | |
512 | struct afs_volume_status *, | |
513 | const struct afs_wait_mode *); | |
08e0e7c8 | 514 | |
1da177e4 LT |
515 | /* |
516 | * inode.c | |
517 | */ | |
00d3b7a4 | 518 | extern struct inode *afs_iget(struct super_block *, struct key *, |
260a9803 DH |
519 | struct afs_fid *, struct afs_file_status *, |
520 | struct afs_callback *); | |
416351f2 | 521 | extern void afs_zap_data(struct afs_vnode *); |
260a9803 | 522 | extern int afs_validate(struct afs_vnode *, struct key *); |
416351f2 | 523 | extern int afs_getattr(struct vfsmount *, struct dentry *, struct kstat *); |
31143d5d | 524 | extern int afs_setattr(struct dentry *, struct iattr *); |
ec26815a | 525 | extern void afs_clear_inode(struct inode *); |
1da177e4 LT |
526 | |
527 | /* | |
528 | * main.c | |
529 | */ | |
b908fe6b | 530 | extern struct afs_uuid afs_uuid; |
1da177e4 LT |
531 | #ifdef AFS_CACHING_SUPPORT |
532 | extern struct cachefs_netfs afs_cache_netfs; | |
533 | #endif | |
534 | ||
08e0e7c8 DH |
535 | /* |
536 | * misc.c | |
537 | */ | |
538 | extern int afs_abort_to_error(u32); | |
539 | ||
1da177e4 LT |
540 | /* |
541 | * mntpt.c | |
542 | */ | |
754661f1 | 543 | extern const struct inode_operations afs_mntpt_inode_operations; |
4b6f5d20 | 544 | extern const struct file_operations afs_mntpt_file_operations; |
1da177e4 LT |
545 | extern unsigned long afs_mntpt_expiry_timeout; |
546 | ||
00d3b7a4 | 547 | extern int afs_mntpt_check_symlink(struct afs_vnode *, struct key *); |
08e0e7c8 DH |
548 | extern void afs_mntpt_kill_timer(void); |
549 | extern void afs_umount_begin(struct vfsmount *, int); | |
1da177e4 | 550 | |
1da177e4 LT |
551 | /* |
552 | * proc.c | |
553 | */ | |
554 | extern int afs_proc_init(void); | |
555 | extern void afs_proc_cleanup(void); | |
ec26815a DH |
556 | extern int afs_proc_cell_setup(struct afs_cell *); |
557 | extern void afs_proc_cell_remove(struct afs_cell *); | |
1da177e4 | 558 | |
08e0e7c8 DH |
559 | /* |
560 | * rxrpc.c | |
561 | */ | |
562 | extern int afs_open_socket(void); | |
563 | extern void afs_close_socket(void); | |
564 | extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t, | |
565 | const struct afs_wait_mode *); | |
566 | extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *, | |
567 | size_t, size_t); | |
568 | extern void afs_flat_call_destructor(struct afs_call *); | |
569 | extern void afs_transfer_reply(struct afs_call *, struct sk_buff *); | |
570 | extern void afs_send_empty_reply(struct afs_call *); | |
b908fe6b | 571 | extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); |
08e0e7c8 DH |
572 | extern int afs_extract_data(struct afs_call *, struct sk_buff *, bool, void *, |
573 | size_t); | |
574 | ||
00d3b7a4 DH |
575 | /* |
576 | * security.c | |
577 | */ | |
578 | extern void afs_clear_permits(struct afs_vnode *); | |
579 | extern void afs_cache_permit(struct afs_vnode *, struct key *, long); | |
416351f2 | 580 | extern void afs_zap_permits(struct rcu_head *); |
00d3b7a4 DH |
581 | extern struct key *afs_request_key(struct afs_cell *); |
582 | extern int afs_permission(struct inode *, int, struct nameidata *); | |
583 | ||
08e0e7c8 DH |
584 | /* |
585 | * server.c | |
586 | */ | |
587 | extern spinlock_t afs_server_peer_lock; | |
588 | ||
260a9803 DH |
589 | #define afs_get_server(S) \ |
590 | do { \ | |
591 | _debug("GET SERVER %d", atomic_read(&(S)->usage)); \ | |
592 | atomic_inc(&(S)->usage); \ | |
593 | } while(0) | |
08e0e7c8 DH |
594 | |
595 | extern struct afs_server *afs_lookup_server(struct afs_cell *, | |
596 | const struct in_addr *); | |
597 | extern struct afs_server *afs_find_server(const struct in_addr *); | |
598 | extern void afs_put_server(struct afs_server *); | |
599 | extern void __exit afs_purge_servers(void); | |
600 | ||
00d3b7a4 DH |
601 | /* |
602 | * super.c | |
603 | */ | |
604 | extern int afs_fs_init(void); | |
605 | extern void afs_fs_exit(void); | |
606 | ||
b908fe6b DH |
607 | /* |
608 | * use-rtnetlink.c | |
609 | */ | |
610 | extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); | |
ec9c9485 | 611 | extern int afs_get_MAC_address(u8 *, size_t); |
b908fe6b | 612 | |
08e0e7c8 DH |
613 | /* |
614 | * vlclient.c | |
615 | */ | |
616 | #ifdef AFS_CACHING_SUPPORT | |
617 | extern struct cachefs_index_def afs_vlocation_cache_index_def; | |
618 | #endif | |
619 | ||
00d3b7a4 DH |
620 | extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *, |
621 | const char *, struct afs_cache_vlocation *, | |
08e0e7c8 | 622 | const struct afs_wait_mode *); |
00d3b7a4 DH |
623 | extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *, |
624 | afs_volid_t, afs_voltype_t, | |
08e0e7c8 DH |
625 | struct afs_cache_vlocation *, |
626 | const struct afs_wait_mode *); | |
627 | ||
628 | /* | |
629 | * vlocation.c | |
630 | */ | |
631 | #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0) | |
632 | ||
633 | extern int __init afs_vlocation_update_init(void); | |
634 | extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *, | |
00d3b7a4 | 635 | struct key *, |
08e0e7c8 DH |
636 | const char *, size_t); |
637 | extern void afs_put_vlocation(struct afs_vlocation *); | |
fbb3fcba | 638 | extern void afs_vlocation_purge(void); |
08e0e7c8 DH |
639 | |
640 | /* | |
641 | * vnode.c | |
642 | */ | |
643 | #ifdef AFS_CACHING_SUPPORT | |
644 | extern struct cachefs_index_def afs_vnode_cache_index_def; | |
645 | #endif | |
646 | ||
647 | extern struct afs_timer_ops afs_vnode_cb_timed_out_ops; | |
648 | ||
649 | static inline struct afs_vnode *AFS_FS_I(struct inode *inode) | |
650 | { | |
651 | return container_of(inode, struct afs_vnode, vfs_inode); | |
652 | } | |
653 | ||
654 | static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) | |
655 | { | |
656 | return &vnode->vfs_inode; | |
657 | } | |
658 | ||
260a9803 DH |
659 | extern void afs_vnode_finalise_status_update(struct afs_vnode *, |
660 | struct afs_server *); | |
00d3b7a4 DH |
661 | extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *, |
662 | struct key *); | |
663 | extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *, | |
664 | off_t, size_t, struct page *); | |
260a9803 DH |
665 | extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *, |
666 | umode_t, struct afs_fid *, struct afs_file_status *, | |
667 | struct afs_callback *, struct afs_server **); | |
668 | extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *, | |
669 | bool); | |
670 | extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *, | |
671 | const char *); | |
672 | extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *, | |
673 | const char *, struct afs_fid *, | |
674 | struct afs_file_status *, struct afs_server **); | |
675 | extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *, | |
676 | struct key *, const char *, const char *); | |
31143d5d DH |
677 | extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t, |
678 | unsigned, unsigned); | |
679 | extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *); | |
45222b9e DH |
680 | extern int afs_vnode_get_volume_status(struct afs_vnode *, struct key *, |
681 | struct afs_volume_status *); | |
08e0e7c8 DH |
682 | |
683 | /* | |
684 | * volume.c | |
685 | */ | |
686 | #ifdef AFS_CACHING_SUPPORT | |
687 | extern struct cachefs_index_def afs_volume_cache_index_def; | |
688 | #endif | |
689 | ||
690 | #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0) | |
691 | ||
692 | extern void afs_put_volume(struct afs_volume *); | |
00d3b7a4 | 693 | extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *); |
08e0e7c8 DH |
694 | extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *); |
695 | extern int afs_volume_release_fileserver(struct afs_vnode *, | |
696 | struct afs_server *, int); | |
697 | ||
31143d5d DH |
698 | /* |
699 | * write.c | |
700 | */ | |
701 | extern int afs_set_page_dirty(struct page *); | |
702 | extern void afs_put_writeback(struct afs_writeback *); | |
703 | extern int afs_prepare_write(struct file *, struct page *, unsigned, unsigned); | |
704 | extern int afs_commit_write(struct file *, struct page *, unsigned, unsigned); | |
705 | extern int afs_writepage(struct page *, struct writeback_control *); | |
706 | extern int afs_writepages(struct address_space *, struct writeback_control *); | |
707 | extern int afs_write_inode(struct inode *, int); | |
708 | extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); | |
709 | extern ssize_t afs_file_write(struct kiocb *, const struct iovec *, | |
710 | unsigned long, loff_t); | |
711 | extern int afs_writeback_all(struct afs_vnode *); | |
712 | extern int afs_fsync(struct file *, struct dentry *, int); | |
713 | ||
714 | ||
08e0e7c8 DH |
715 | /*****************************************************************************/ |
716 | /* | |
717 | * debug tracing | |
718 | */ | |
719 | extern unsigned afs_debug; | |
720 | ||
721 | #define dbgprintk(FMT,...) \ | |
722 | printk("[%x%-6.6s] "FMT"\n", smp_processor_id(), current->comm ,##__VA_ARGS__) | |
723 | ||
724 | /* make sure we maintain the format strings, even when debugging is disabled */ | |
725 | static inline __attribute__((format(printf,1,2))) | |
726 | void _dbprintk(const char *fmt, ...) | |
727 | { | |
728 | } | |
729 | ||
730 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__) | |
731 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__) | |
732 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) | |
733 | ||
734 | ||
735 | #if defined(__KDEBUG) | |
736 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
737 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
738 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
739 | ||
740 | #elif defined(CONFIG_AFS_DEBUG) | |
741 | #define AFS_DEBUG_KENTER 0x01 | |
742 | #define AFS_DEBUG_KLEAVE 0x02 | |
743 | #define AFS_DEBUG_KDEBUG 0x04 | |
744 | ||
745 | #define _enter(FMT,...) \ | |
746 | do { \ | |
747 | if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ | |
748 | kenter(FMT,##__VA_ARGS__); \ | |
749 | } while (0) | |
750 | ||
751 | #define _leave(FMT,...) \ | |
752 | do { \ | |
753 | if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ | |
754 | kleave(FMT,##__VA_ARGS__); \ | |
755 | } while (0) | |
756 | ||
757 | #define _debug(FMT,...) \ | |
758 | do { \ | |
759 | if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ | |
760 | kdebug(FMT,##__VA_ARGS__); \ | |
761 | } while (0) | |
762 | ||
763 | #else | |
764 | #define _enter(FMT,...) _dbprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__) | |
765 | #define _leave(FMT,...) _dbprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__) | |
766 | #define _debug(FMT,...) _dbprintk(" "FMT ,##__VA_ARGS__) | |
767 | #endif | |
768 | ||
769 | /* | |
770 | * debug assertion checking | |
771 | */ | |
772 | #if 1 // defined(__KDEBUGALL) | |
773 | ||
774 | #define ASSERT(X) \ | |
775 | do { \ | |
776 | if (unlikely(!(X))) { \ | |
777 | printk(KERN_ERR "\n"); \ | |
778 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
779 | BUG(); \ | |
780 | } \ | |
781 | } while(0) | |
782 | ||
783 | #define ASSERTCMP(X, OP, Y) \ | |
784 | do { \ | |
785 | if (unlikely(!((X) OP (Y)))) { \ | |
786 | printk(KERN_ERR "\n"); \ | |
787 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
788 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
789 | (unsigned long)(X), (unsigned long)(Y)); \ | |
790 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
791 | (unsigned long)(X), (unsigned long)(Y)); \ | |
792 | BUG(); \ | |
793 | } \ | |
794 | } while(0) | |
795 | ||
416351f2 DH |
796 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
797 | do { \ | |
798 | if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ | |
799 | printk(KERN_ERR "\n"); \ | |
800 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
801 | printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ | |
802 | (unsigned long)(L), (unsigned long)(N), \ | |
803 | (unsigned long)(H)); \ | |
804 | printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ | |
805 | (unsigned long)(L), (unsigned long)(N), \ | |
806 | (unsigned long)(H)); \ | |
807 | BUG(); \ | |
808 | } \ | |
809 | } while(0) | |
810 | ||
08e0e7c8 DH |
811 | #define ASSERTIF(C, X) \ |
812 | do { \ | |
813 | if (unlikely((C) && !(X))) { \ | |
814 | printk(KERN_ERR "\n"); \ | |
815 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
816 | BUG(); \ | |
817 | } \ | |
818 | } while(0) | |
819 | ||
820 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
821 | do { \ | |
822 | if (unlikely((C) && !((X) OP (Y)))) { \ | |
823 | printk(KERN_ERR "\n"); \ | |
824 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
825 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
826 | (unsigned long)(X), (unsigned long)(Y)); \ | |
827 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
828 | (unsigned long)(X), (unsigned long)(Y)); \ | |
829 | BUG(); \ | |
830 | } \ | |
831 | } while(0) | |
832 | ||
833 | #else | |
834 | ||
835 | #define ASSERT(X) \ | |
836 | do { \ | |
837 | } while(0) | |
838 | ||
839 | #define ASSERTCMP(X, OP, Y) \ | |
840 | do { \ | |
841 | } while(0) | |
842 | ||
416351f2 DH |
843 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
844 | do { \ | |
845 | } while(0) | |
846 | ||
08e0e7c8 DH |
847 | #define ASSERTIF(C, X) \ |
848 | do { \ | |
849 | } while(0) | |
850 | ||
851 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
852 | do { \ | |
853 | } while(0) | |
854 | ||
855 | #endif /* __KDEBUGALL */ |