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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 | 16 | #include <linux/rxrpc.h> |
00d3b7a4 | 17 | #include <linux/key.h> |
e8edc6e0 | 18 | #include <linux/workqueue.h> |
00c541ea | 19 | #include <linux/sched.h> |
80e50be4 | 20 | #include <linux/fscache.h> |
e1da0222 | 21 | #include <linux/backing-dev.h> |
ff548773 | 22 | #include <linux/uuid.h> |
8324f0bc | 23 | #include <net/af_rxrpc.h> |
00c541ea | 24 | |
08e0e7c8 DH |
25 | #include "afs.h" |
26 | #include "afs_vl.h" | |
27 | ||
28 | #define AFS_CELL_MAX_ADDRS 15 | |
29 | ||
31143d5d | 30 | struct pagevec; |
08e0e7c8 DH |
31 | struct afs_call; |
32 | ||
33 | typedef enum { | |
34 | AFS_VL_NEW, /* new, uninitialised record */ | |
35 | AFS_VL_CREATING, /* creating record */ | |
36 | AFS_VL_VALID, /* record is pending */ | |
37 | AFS_VL_NO_VOLUME, /* no such volume available */ | |
38 | AFS_VL_UPDATING, /* update in progress */ | |
39 | AFS_VL_VOLUME_DELETED, /* volume was deleted */ | |
40 | AFS_VL_UNCERTAIN, /* uncertain state (update failed) */ | |
41 | } __attribute__((packed)) afs_vlocation_state_t; | |
1da177e4 | 42 | |
00d3b7a4 DH |
43 | struct afs_mount_params { |
44 | bool rwpath; /* T if the parent should be considered R/W */ | |
45 | bool force; /* T to force cell type */ | |
bec5eb61 | 46 | bool autocell; /* T if set auto mount operation */ |
00d3b7a4 DH |
47 | afs_voltype_t type; /* type of volume requested */ |
48 | int volnamesz; /* size of volume name */ | |
49 | const char *volname; /* name of volume to mount */ | |
50 | struct afs_cell *cell; /* cell in which to find volume */ | |
51 | struct afs_volume *volume; /* volume record */ | |
52 | struct key *key; /* key to use for secure mounting */ | |
53 | }; | |
54 | ||
8e8d7f13 DH |
55 | enum afs_call_state { |
56 | AFS_CALL_REQUESTING, /* request is being sent for outgoing call */ | |
57 | AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */ | |
58 | AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */ | |
59 | AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */ | |
60 | AFS_CALL_REPLYING, /* replying to incoming call */ | |
61 | AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */ | |
62 | AFS_CALL_COMPLETE, /* Completed or failed */ | |
63 | }; | |
08e0e7c8 DH |
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 */ | |
08e0e7c8 | 69 | wait_queue_head_t waitq; /* processes awaiting completion */ |
341f741f | 70 | struct work_struct async_work; /* async I/O processor */ |
08e0e7c8 | 71 | struct work_struct work; /* actual work processor */ |
08e0e7c8 DH |
72 | struct rxrpc_call *rxcall; /* RxRPC call handle */ |
73 | struct key *key; /* security for this call */ | |
74 | struct afs_server *server; /* server affected by incoming CM call */ | |
75 | void *request; /* request data (first part) */ | |
31143d5d DH |
76 | struct address_space *mapping; /* page set */ |
77 | struct afs_writeback *wb; /* writeback being performed */ | |
08e0e7c8 DH |
78 | void *buffer; /* reply receive buffer */ |
79 | void *reply; /* reply buffer (first part) */ | |
80 | void *reply2; /* reply buffer (second part) */ | |
81 | void *reply3; /* reply buffer (third part) */ | |
260a9803 | 82 | void *reply4; /* reply buffer (fourth part) */ |
31143d5d DH |
83 | pgoff_t first; /* first page in mapping to deal with */ |
84 | pgoff_t last; /* last page in mapping to deal with */ | |
d001648e | 85 | size_t offset; /* offset into received data store */ |
341f741f | 86 | atomic_t usage; |
8e8d7f13 | 87 | enum afs_call_state state; |
08e0e7c8 | 88 | int error; /* error code */ |
d001648e | 89 | u32 abort_code; /* Remote abort ID or 0 */ |
08e0e7c8 DH |
90 | unsigned request_size; /* size of request data */ |
91 | unsigned reply_max; /* maximum size of reply */ | |
31143d5d DH |
92 | unsigned first_offset; /* offset into mapping[first] */ |
93 | unsigned last_to; /* amount of mapping[last] */ | |
08e0e7c8 DH |
94 | unsigned char unmarshall; /* unmarshalling phase */ |
95 | bool incoming; /* T if incoming call */ | |
31143d5d | 96 | bool send_pages; /* T if data from mapping should be sent */ |
d001648e | 97 | bool need_attention; /* T if RxRPC poked us */ |
56ff9c83 | 98 | bool async; /* T if asynchronous */ |
08e0e7c8 DH |
99 | u16 service_id; /* RxRPC service ID to call */ |
100 | __be16 port; /* target UDP port */ | |
50a2c953 | 101 | u32 operation_ID; /* operation ID for an incoming call */ |
08e0e7c8 DH |
102 | u32 count; /* count for use in unmarshalling */ |
103 | __be32 tmp; /* place to extract temporary data */ | |
31143d5d | 104 | afs_dataversion_t store_version; /* updated version expected from store */ |
08e0e7c8 DH |
105 | }; |
106 | ||
107 | struct afs_call_type { | |
00d3b7a4 DH |
108 | const char *name; |
109 | ||
08e0e7c8 DH |
110 | /* deliver request or reply data to an call |
111 | * - returning an error will cause the call to be aborted | |
112 | */ | |
d001648e | 113 | int (*deliver)(struct afs_call *call); |
08e0e7c8 DH |
114 | |
115 | /* map an abort code to an error number */ | |
116 | int (*abort_to_error)(u32 abort_code); | |
117 | ||
118 | /* clean up a call */ | |
119 | void (*destructor)(struct afs_call *call); | |
341f741f DH |
120 | |
121 | /* Work function */ | |
122 | void (*work)(struct work_struct *work); | |
08e0e7c8 DH |
123 | }; |
124 | ||
196ee9cd DH |
125 | /* |
126 | * Record of an outstanding read operation on a vnode. | |
127 | */ | |
128 | struct afs_read { | |
129 | loff_t pos; /* Where to start reading */ | |
130 | loff_t len; /* How much to read */ | |
131 | loff_t actual_len; /* How much we're actually getting */ | |
132 | atomic_t usage; | |
133 | unsigned int remain; /* Amount remaining */ | |
134 | unsigned int index; /* Which page we're reading into */ | |
135 | unsigned int pg_offset; /* Offset in page we're at */ | |
136 | unsigned int nr_pages; | |
137 | void (*page_done)(struct afs_call *, struct afs_read *); | |
138 | struct page *pages[]; | |
139 | }; | |
140 | ||
31143d5d DH |
141 | /* |
142 | * record of an outstanding writeback on a vnode | |
143 | */ | |
144 | struct afs_writeback { | |
145 | struct list_head link; /* link in vnode->writebacks */ | |
146 | struct work_struct writer; /* work item to perform the writeback */ | |
147 | struct afs_vnode *vnode; /* vnode to which this write applies */ | |
148 | struct key *key; /* owner of this write */ | |
149 | wait_queue_head_t waitq; /* completion and ready wait queue */ | |
150 | pgoff_t first; /* first page in batch */ | |
151 | pgoff_t point; /* last page in current store op */ | |
152 | pgoff_t last; /* last page in batch (inclusive) */ | |
153 | unsigned offset_first; /* offset into first page of start of write */ | |
154 | unsigned to_last; /* offset into last page of end of write */ | |
155 | int num_conflicts; /* count of conflicting writes in list */ | |
156 | int usage; | |
157 | bool conflicts; /* T if has dependent conflicts */ | |
158 | enum { | |
159 | AFS_WBACK_SYNCING, /* synchronisation being performed */ | |
160 | AFS_WBACK_PENDING, /* write pending */ | |
161 | AFS_WBACK_CONFLICTING, /* conflicting writes posted */ | |
162 | AFS_WBACK_WRITING, /* writing back */ | |
163 | AFS_WBACK_COMPLETE /* the writeback record has been unlinked */ | |
164 | } state __attribute__((packed)); | |
165 | }; | |
166 | ||
08e0e7c8 DH |
167 | /* |
168 | * AFS superblock private data | |
169 | * - there's one superblock per volume | |
170 | */ | |
171 | struct afs_super_info { | |
172 | struct afs_volume *volume; /* volume record */ | |
173 | char rwparent; /* T if parent is R/W AFS volume */ | |
174 | }; | |
1da177e4 | 175 | |
08e0e7c8 DH |
176 | static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
177 | { | |
178 | return sb->s_fs_info; | |
1da177e4 LT |
179 | } |
180 | ||
08e0e7c8 DH |
181 | extern struct file_system_type afs_fs_type; |
182 | ||
183 | /* | |
184 | * entry in the cached cell catalogue | |
185 | */ | |
186 | struct afs_cache_cell { | |
00d3b7a4 DH |
187 | char name[AFS_MAXCELLNAME]; /* cell name (padded with NULs) */ |
188 | struct in_addr vl_servers[15]; /* cached cell VL servers */ | |
08e0e7c8 DH |
189 | }; |
190 | ||
191 | /* | |
192 | * AFS cell record | |
193 | */ | |
194 | struct afs_cell { | |
195 | atomic_t usage; | |
196 | struct list_head link; /* main cell list link */ | |
00d3b7a4 | 197 | struct key *anonymous_key; /* anonymous user key for this cell */ |
08e0e7c8 | 198 | struct list_head proc_link; /* /proc cell list link */ |
9b3f26c9 DH |
199 | #ifdef CONFIG_AFS_FSCACHE |
200 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 DH |
201 | #endif |
202 | ||
203 | /* server record management */ | |
204 | rwlock_t servers_lock; /* active server list lock */ | |
205 | struct list_head servers; /* active server list */ | |
206 | ||
207 | /* volume location record management */ | |
208 | struct rw_semaphore vl_sem; /* volume management serialisation semaphore */ | |
209 | struct list_head vl_list; /* cell's active VL record list */ | |
210 | spinlock_t vl_lock; /* vl_list lock */ | |
211 | unsigned short vl_naddrs; /* number of VL servers in addr list */ | |
212 | unsigned short vl_curr_svix; /* current server index */ | |
213 | struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */ | |
214 | ||
215 | char name[0]; /* cell name - must go last */ | |
216 | }; | |
217 | ||
218 | /* | |
219 | * entry in the cached volume location catalogue | |
220 | */ | |
221 | struct afs_cache_vlocation { | |
00d3b7a4 DH |
222 | /* volume name (lowercase, padded with NULs) */ |
223 | uint8_t name[AFS_MAXVOLNAME + 1]; | |
224 | ||
08e0e7c8 DH |
225 | uint8_t nservers; /* number of entries used in servers[] */ |
226 | uint8_t vidmask; /* voltype mask for vid[] */ | |
227 | uint8_t srvtmask[8]; /* voltype masks for servers[] */ | |
228 | #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ | |
229 | #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ | |
230 | #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ | |
231 | ||
232 | afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */ | |
233 | struct in_addr servers[8]; /* fileserver addresses */ | |
234 | time_t rtime; /* last retrieval time */ | |
235 | }; | |
236 | ||
237 | /* | |
238 | * volume -> vnode hash table entry | |
239 | */ | |
240 | struct afs_cache_vhash { | |
241 | afs_voltype_t vtype; /* which volume variation */ | |
242 | uint8_t hash_bucket; /* which hash bucket this represents */ | |
243 | } __attribute__((packed)); | |
244 | ||
245 | /* | |
246 | * AFS volume location record | |
247 | */ | |
248 | struct afs_vlocation { | |
249 | atomic_t usage; | |
250 | time_t time_of_death; /* time at which put reduced usage to 0 */ | |
251 | struct list_head link; /* link in cell volume location list */ | |
252 | struct list_head grave; /* link in master graveyard list */ | |
253 | struct list_head update; /* link in master update list */ | |
254 | struct afs_cell *cell; /* cell to which volume belongs */ | |
9b3f26c9 DH |
255 | #ifdef CONFIG_AFS_FSCACHE |
256 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 DH |
257 | #endif |
258 | struct afs_cache_vlocation vldb; /* volume information DB record */ | |
259 | struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ | |
260 | wait_queue_head_t waitq; /* status change waitqueue */ | |
261 | time_t update_at; /* time at which record should be updated */ | |
39bf0949 | 262 | spinlock_t lock; /* access lock */ |
08e0e7c8 DH |
263 | afs_vlocation_state_t state; /* volume location state */ |
264 | unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ | |
265 | unsigned short upd_busy_cnt; /* EBUSY count during update */ | |
266 | bool valid; /* T if valid */ | |
267 | }; | |
268 | ||
269 | /* | |
270 | * AFS fileserver record | |
271 | */ | |
272 | struct afs_server { | |
273 | atomic_t usage; | |
274 | time_t time_of_death; /* time at which put reduced usage to 0 */ | |
275 | struct in_addr addr; /* server address */ | |
276 | struct afs_cell *cell; /* cell in which server resides */ | |
277 | struct list_head link; /* link in cell's server list */ | |
278 | struct list_head grave; /* link in master graveyard list */ | |
279 | struct rb_node master_rb; /* link in master by-addr tree */ | |
280 | struct rw_semaphore sem; /* access lock */ | |
281 | ||
282 | /* file service access */ | |
283 | struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */ | |
284 | unsigned long fs_act_jif; /* time at which last activity occurred */ | |
285 | unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ | |
286 | spinlock_t fs_lock; /* access lock */ | |
287 | int fs_state; /* 0 or reason FS currently marked dead (-errno) */ | |
288 | ||
289 | /* callback promise management */ | |
290 | struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */ | |
291 | struct delayed_work cb_updater; /* callback updater */ | |
292 | struct delayed_work cb_break_work; /* collected break dispatcher */ | |
293 | wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */ | |
294 | spinlock_t cb_lock; /* access lock */ | |
295 | struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */ | |
296 | atomic_t cb_break_n; /* number of pending breaks */ | |
297 | u8 cb_break_head; /* head of callback breaking ring */ | |
298 | u8 cb_break_tail; /* tail of callback breaking ring */ | |
299 | }; | |
300 | ||
301 | /* | |
302 | * AFS volume access record | |
303 | */ | |
304 | struct afs_volume { | |
305 | atomic_t usage; | |
306 | struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */ | |
307 | struct afs_vlocation *vlocation; /* volume location */ | |
9b3f26c9 DH |
308 | #ifdef CONFIG_AFS_FSCACHE |
309 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 DH |
310 | #endif |
311 | afs_volid_t vid; /* volume ID */ | |
312 | afs_voltype_t type; /* type of volume */ | |
313 | char type_force; /* force volume type (suppress R/O -> R/W) */ | |
314 | unsigned short nservers; /* number of server slots filled */ | |
315 | unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */ | |
316 | struct afs_server *servers[8]; /* servers on which volume resides (ordered) */ | |
317 | struct rw_semaphore server_sem; /* lock for accessing current server */ | |
e1da0222 | 318 | struct backing_dev_info bdi; |
08e0e7c8 DH |
319 | }; |
320 | ||
321 | /* | |
322 | * vnode catalogue entry | |
323 | */ | |
324 | struct afs_cache_vnode { | |
325 | afs_vnodeid_t vnode_id; /* vnode ID */ | |
326 | unsigned vnode_unique; /* vnode ID uniquifier */ | |
327 | afs_dataversion_t data_version; /* data version */ | |
328 | }; | |
329 | ||
330 | /* | |
331 | * AFS inode private data | |
332 | */ | |
333 | struct afs_vnode { | |
334 | struct inode vfs_inode; /* the VFS's inode record */ | |
335 | ||
336 | struct afs_volume *volume; /* volume on which vnode resides */ | |
337 | struct afs_server *server; /* server currently supplying this file */ | |
338 | struct afs_fid fid; /* the file identifier for this inode */ | |
339 | struct afs_file_status status; /* AFS status info for this file */ | |
9b3f26c9 DH |
340 | #ifdef CONFIG_AFS_FSCACHE |
341 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 342 | #endif |
00d3b7a4 DH |
343 | struct afs_permits *permits; /* cache of permits so far obtained */ |
344 | struct mutex permits_lock; /* lock for altering permits list */ | |
260a9803 | 345 | struct mutex validate_lock; /* lock for validating this vnode */ |
08e0e7c8 | 346 | wait_queue_head_t update_waitq; /* status fetch waitqueue */ |
260a9803 | 347 | int update_cnt; /* number of outstanding ops that will update the |
08e0e7c8 | 348 | * status */ |
31143d5d | 349 | spinlock_t writeback_lock; /* lock for writebacks */ |
08e0e7c8 DH |
350 | spinlock_t lock; /* waitqueue/flags lock */ |
351 | unsigned long flags; | |
352 | #define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */ | |
260a9803 | 353 | #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
08e0e7c8 DH |
354 | #define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */ |
355 | #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ | |
356 | #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ | |
357 | #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ | |
e8d6c554 DH |
358 | #define AFS_VNODE_LOCKING 6 /* set if waiting for lock on vnode */ |
359 | #define AFS_VNODE_READLOCKED 7 /* set if vnode is read-locked on the server */ | |
360 | #define AFS_VNODE_WRITELOCKED 8 /* set if vnode is write-locked on the server */ | |
361 | #define AFS_VNODE_UNLOCKING 9 /* set if vnode is being unlocked on the server */ | |
bec5eb61 | 362 | #define AFS_VNODE_AUTOCELL 10 /* set if Vnode is an auto mount point */ |
363 | #define AFS_VNODE_PSEUDODIR 11 /* set if Vnode is a pseudo directory */ | |
08e0e7c8 | 364 | |
00d3b7a4 DH |
365 | long acl_order; /* ACL check count (callback break count) */ |
366 | ||
31143d5d | 367 | struct list_head writebacks; /* alterations in pagecache that need writing */ |
e8d6c554 DH |
368 | struct list_head pending_locks; /* locks waiting to be granted */ |
369 | struct list_head granted_locks; /* locks granted on this file */ | |
370 | struct delayed_work lock_work; /* work to be done in locking */ | |
371 | struct key *unlock_key; /* key to be used in unlocking */ | |
31143d5d | 372 | |
08e0e7c8 DH |
373 | /* outstanding callback notification on this file */ |
374 | struct rb_node server_rb; /* link in server->fs_vnodes */ | |
375 | struct rb_node cb_promise; /* link in server->cb_promises */ | |
376 | struct work_struct cb_broken_work; /* work to be done on callback break */ | |
08e0e7c8 DH |
377 | time_t cb_expires; /* time at which callback expires */ |
378 | time_t cb_expires_at; /* time used to order cb_promise */ | |
379 | unsigned cb_version; /* callback version */ | |
380 | unsigned cb_expiry; /* callback expiry time */ | |
381 | afs_callback_type_t cb_type; /* type of callback */ | |
382 | bool cb_promised; /* true if promise still holds */ | |
383 | }; | |
384 | ||
00d3b7a4 DH |
385 | /* |
386 | * cached security record for one user's attempt to access a vnode | |
387 | */ | |
388 | struct afs_permit { | |
389 | struct key *key; /* RxRPC ticket holding a security context */ | |
390 | afs_access_t access_mask; /* access mask for this key */ | |
391 | }; | |
392 | ||
393 | /* | |
394 | * cache of security records from attempts to access a vnode | |
395 | */ | |
396 | struct afs_permits { | |
397 | struct rcu_head rcu; /* disposal procedure */ | |
398 | int count; /* number of records */ | |
399 | struct afs_permit permits[0]; /* the permits so far examined */ | |
400 | }; | |
401 | ||
b908fe6b DH |
402 | /* |
403 | * record of one of a system's set of network interfaces | |
404 | */ | |
405 | struct afs_interface { | |
b908fe6b DH |
406 | struct in_addr address; /* IPv4 address bound to interface */ |
407 | struct in_addr netmask; /* netmask applied to address */ | |
408 | unsigned mtu; /* MTU of interface */ | |
409 | }; | |
410 | ||
08e0e7c8 | 411 | /*****************************************************************************/ |
9b3f26c9 DH |
412 | /* |
413 | * cache.c | |
414 | */ | |
415 | #ifdef CONFIG_AFS_FSCACHE | |
416 | extern struct fscache_netfs afs_cache_netfs; | |
417 | extern struct fscache_cookie_def afs_cell_cache_index_def; | |
418 | extern struct fscache_cookie_def afs_vlocation_cache_index_def; | |
419 | extern struct fscache_cookie_def afs_volume_cache_index_def; | |
420 | extern struct fscache_cookie_def afs_vnode_cache_index_def; | |
421 | #else | |
422 | #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
423 | #define afs_vlocation_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
424 | #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
425 | #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
426 | #endif | |
427 | ||
08e0e7c8 DH |
428 | /* |
429 | * callback.c | |
430 | */ | |
431 | extern void afs_init_callback_state(struct afs_server *); | |
432 | extern void afs_broken_callback_work(struct work_struct *); | |
433 | extern void afs_break_callbacks(struct afs_server *, size_t, | |
434 | struct afs_callback[]); | |
260a9803 | 435 | extern void afs_discard_callback_on_delete(struct afs_vnode *); |
08e0e7c8 DH |
436 | extern void afs_give_up_callback(struct afs_vnode *); |
437 | extern void afs_dispatch_give_up_callbacks(struct work_struct *); | |
438 | extern void afs_flush_callback_breaks(struct afs_server *); | |
439 | extern int __init afs_callback_update_init(void); | |
fbb3fcba | 440 | extern void afs_callback_update_kill(void); |
08e0e7c8 | 441 | |
1da177e4 LT |
442 | /* |
443 | * cell.c | |
444 | */ | |
445 | extern struct rw_semaphore afs_proc_cells_sem; | |
446 | extern struct list_head afs_proc_cells; | |
1da177e4 | 447 | |
08e0e7c8 DH |
448 | #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0) |
449 | extern int afs_cell_init(char *); | |
bec5eb61 | 450 | extern struct afs_cell *afs_cell_create(const char *, unsigned, char *, bool); |
451 | extern struct afs_cell *afs_cell_lookup(const char *, unsigned, bool); | |
08e0e7c8 DH |
452 | extern struct afs_cell *afs_grab_cell(struct afs_cell *); |
453 | extern void afs_put_cell(struct afs_cell *); | |
454 | extern void afs_cell_purge(void); | |
455 | ||
456 | /* | |
457 | * cmservice.c | |
458 | */ | |
459 | extern bool afs_cm_incoming_call(struct afs_call *); | |
460 | ||
1da177e4 LT |
461 | /* |
462 | * dir.c | |
463 | */ | |
754661f1 | 464 | extern const struct inode_operations afs_dir_inode_operations; |
d61dcce2 | 465 | extern const struct dentry_operations afs_fs_dentry_operations; |
4b6f5d20 | 466 | extern const struct file_operations afs_dir_file_operations; |
1da177e4 LT |
467 | |
468 | /* | |
469 | * file.c | |
470 | */ | |
f5e54d6e | 471 | extern const struct address_space_operations afs_fs_aops; |
754661f1 | 472 | extern const struct inode_operations afs_file_inode_operations; |
00d3b7a4 DH |
473 | extern const struct file_operations afs_file_operations; |
474 | ||
475 | extern int afs_open(struct inode *, struct file *); | |
476 | extern int afs_release(struct inode *, struct file *); | |
f6d335c0 | 477 | extern int afs_page_filler(void *, struct page *); |
196ee9cd | 478 | extern void afs_put_read(struct afs_read *); |
1da177e4 | 479 | |
e8d6c554 DH |
480 | /* |
481 | * flock.c | |
482 | */ | |
483 | extern void __exit afs_kill_lock_manager(void); | |
484 | extern void afs_lock_work(struct work_struct *); | |
485 | extern void afs_lock_may_be_available(struct afs_vnode *); | |
486 | extern int afs_lock(struct file *, int, struct file_lock *); | |
487 | extern int afs_flock(struct file *, int, struct file_lock *); | |
488 | ||
08e0e7c8 DH |
489 | /* |
490 | * fsclient.c | |
491 | */ | |
00d3b7a4 DH |
492 | extern int afs_fs_fetch_file_status(struct afs_server *, struct key *, |
493 | struct afs_vnode *, struct afs_volsync *, | |
56ff9c83 DH |
494 | bool); |
495 | extern int afs_fs_give_up_callbacks(struct afs_server *, bool); | |
00d3b7a4 | 496 | extern int afs_fs_fetch_data(struct afs_server *, struct key *, |
56ff9c83 | 497 | struct afs_vnode *, struct afs_read *, bool); |
260a9803 DH |
498 | extern int afs_fs_create(struct afs_server *, struct key *, |
499 | struct afs_vnode *, const char *, umode_t, | |
500 | struct afs_fid *, struct afs_file_status *, | |
56ff9c83 | 501 | struct afs_callback *, bool); |
260a9803 | 502 | extern int afs_fs_remove(struct afs_server *, struct key *, |
56ff9c83 | 503 | struct afs_vnode *, const char *, bool, bool); |
260a9803 | 504 | extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *, |
56ff9c83 | 505 | struct afs_vnode *, const char *, bool); |
260a9803 DH |
506 | extern int afs_fs_symlink(struct afs_server *, struct key *, |
507 | struct afs_vnode *, const char *, const char *, | |
56ff9c83 | 508 | struct afs_fid *, struct afs_file_status *, bool); |
260a9803 DH |
509 | extern int afs_fs_rename(struct afs_server *, struct key *, |
510 | struct afs_vnode *, const char *, | |
56ff9c83 | 511 | struct afs_vnode *, const char *, bool); |
31143d5d | 512 | extern int afs_fs_store_data(struct afs_server *, struct afs_writeback *, |
56ff9c83 | 513 | pgoff_t, pgoff_t, unsigned, unsigned, bool); |
31143d5d | 514 | extern int afs_fs_setattr(struct afs_server *, struct key *, |
56ff9c83 | 515 | struct afs_vnode *, struct iattr *, bool); |
45222b9e DH |
516 | extern int afs_fs_get_volume_status(struct afs_server *, struct key *, |
517 | struct afs_vnode *, | |
56ff9c83 | 518 | struct afs_volume_status *, bool); |
e8d6c554 | 519 | extern int afs_fs_set_lock(struct afs_server *, struct key *, |
56ff9c83 | 520 | struct afs_vnode *, afs_lock_type_t, bool); |
e8d6c554 | 521 | extern int afs_fs_extend_lock(struct afs_server *, struct key *, |
56ff9c83 | 522 | struct afs_vnode *, bool); |
e8d6c554 | 523 | extern int afs_fs_release_lock(struct afs_server *, struct key *, |
56ff9c83 | 524 | struct afs_vnode *, bool); |
08e0e7c8 | 525 | |
1da177e4 LT |
526 | /* |
527 | * inode.c | |
528 | */ | |
bec5eb61 | 529 | extern struct inode *afs_iget_autocell(struct inode *, const char *, int, |
530 | struct key *); | |
00d3b7a4 | 531 | extern struct inode *afs_iget(struct super_block *, struct key *, |
260a9803 DH |
532 | struct afs_fid *, struct afs_file_status *, |
533 | struct afs_callback *); | |
416351f2 | 534 | extern void afs_zap_data(struct afs_vnode *); |
260a9803 | 535 | extern int afs_validate(struct afs_vnode *, struct key *); |
416351f2 | 536 | extern int afs_getattr(struct vfsmount *, struct dentry *, struct kstat *); |
31143d5d | 537 | extern int afs_setattr(struct dentry *, struct iattr *); |
b57922d9 | 538 | extern void afs_evict_inode(struct inode *); |
bec5eb61 | 539 | extern int afs_drop_inode(struct inode *); |
1da177e4 LT |
540 | |
541 | /* | |
542 | * main.c | |
543 | */ | |
0ad53eee | 544 | extern struct workqueue_struct *afs_wq; |
ff548773 | 545 | extern struct uuid_v1 afs_uuid; |
1da177e4 | 546 | |
08e0e7c8 DH |
547 | /* |
548 | * misc.c | |
549 | */ | |
550 | extern int afs_abort_to_error(u32); | |
551 | ||
1da177e4 LT |
552 | /* |
553 | * mntpt.c | |
554 | */ | |
754661f1 | 555 | extern const struct inode_operations afs_mntpt_inode_operations; |
bec5eb61 | 556 | extern const struct inode_operations afs_autocell_inode_operations; |
4b6f5d20 | 557 | extern const struct file_operations afs_mntpt_file_operations; |
1da177e4 | 558 | |
d18610b0 | 559 | extern struct vfsmount *afs_d_automount(struct path *); |
00d3b7a4 | 560 | extern int afs_mntpt_check_symlink(struct afs_vnode *, struct key *); |
08e0e7c8 | 561 | extern void afs_mntpt_kill_timer(void); |
1da177e4 | 562 | |
1da177e4 LT |
563 | /* |
564 | * proc.c | |
565 | */ | |
566 | extern int afs_proc_init(void); | |
567 | extern void afs_proc_cleanup(void); | |
ec26815a DH |
568 | extern int afs_proc_cell_setup(struct afs_cell *); |
569 | extern void afs_proc_cell_remove(struct afs_cell *); | |
1da177e4 | 570 | |
08e0e7c8 DH |
571 | /* |
572 | * rxrpc.c | |
573 | */ | |
8324f0bc | 574 | extern struct socket *afs_socket; |
341f741f | 575 | extern atomic_t afs_outstanding_calls; |
8324f0bc | 576 | |
08e0e7c8 DH |
577 | extern int afs_open_socket(void); |
578 | extern void afs_close_socket(void); | |
341f741f DH |
579 | extern void afs_put_call(struct afs_call *); |
580 | extern int afs_queue_call_work(struct afs_call *); | |
56ff9c83 | 581 | extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t, bool); |
08e0e7c8 DH |
582 | extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *, |
583 | size_t, size_t); | |
584 | extern void afs_flat_call_destructor(struct afs_call *); | |
08e0e7c8 | 585 | extern void afs_send_empty_reply(struct afs_call *); |
b908fe6b | 586 | extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); |
d001648e | 587 | extern int afs_extract_data(struct afs_call *, void *, size_t, bool); |
08e0e7c8 | 588 | |
d001648e | 589 | static inline int afs_transfer_reply(struct afs_call *call) |
372ee163 | 590 | { |
d001648e | 591 | return afs_extract_data(call, call->buffer, call->reply_max, false); |
372ee163 DH |
592 | } |
593 | ||
00d3b7a4 DH |
594 | /* |
595 | * security.c | |
596 | */ | |
597 | extern void afs_clear_permits(struct afs_vnode *); | |
598 | extern void afs_cache_permit(struct afs_vnode *, struct key *, long); | |
416351f2 | 599 | extern void afs_zap_permits(struct rcu_head *); |
00d3b7a4 | 600 | extern struct key *afs_request_key(struct afs_cell *); |
10556cb2 | 601 | extern int afs_permission(struct inode *, int); |
00d3b7a4 | 602 | |
08e0e7c8 DH |
603 | /* |
604 | * server.c | |
605 | */ | |
606 | extern spinlock_t afs_server_peer_lock; | |
607 | ||
260a9803 DH |
608 | #define afs_get_server(S) \ |
609 | do { \ | |
610 | _debug("GET SERVER %d", atomic_read(&(S)->usage)); \ | |
611 | atomic_inc(&(S)->usage); \ | |
612 | } while(0) | |
08e0e7c8 DH |
613 | |
614 | extern struct afs_server *afs_lookup_server(struct afs_cell *, | |
615 | const struct in_addr *); | |
8324f0bc | 616 | extern struct afs_server *afs_find_server(const struct sockaddr_rxrpc *); |
08e0e7c8 DH |
617 | extern void afs_put_server(struct afs_server *); |
618 | extern void __exit afs_purge_servers(void); | |
619 | ||
00d3b7a4 DH |
620 | /* |
621 | * super.c | |
622 | */ | |
623 | extern int afs_fs_init(void); | |
624 | extern void afs_fs_exit(void); | |
625 | ||
b908fe6b DH |
626 | /* |
627 | * use-rtnetlink.c | |
628 | */ | |
629 | extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); | |
ec9c9485 | 630 | extern int afs_get_MAC_address(u8 *, size_t); |
b908fe6b | 631 | |
08e0e7c8 DH |
632 | /* |
633 | * vlclient.c | |
634 | */ | |
00d3b7a4 DH |
635 | extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *, |
636 | const char *, struct afs_cache_vlocation *, | |
56ff9c83 | 637 | bool); |
00d3b7a4 DH |
638 | extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *, |
639 | afs_volid_t, afs_voltype_t, | |
56ff9c83 | 640 | struct afs_cache_vlocation *, bool); |
08e0e7c8 DH |
641 | |
642 | /* | |
643 | * vlocation.c | |
644 | */ | |
645 | #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0) | |
646 | ||
647 | extern int __init afs_vlocation_update_init(void); | |
648 | extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *, | |
00d3b7a4 | 649 | struct key *, |
08e0e7c8 DH |
650 | const char *, size_t); |
651 | extern void afs_put_vlocation(struct afs_vlocation *); | |
fbb3fcba | 652 | extern void afs_vlocation_purge(void); |
08e0e7c8 DH |
653 | |
654 | /* | |
655 | * vnode.c | |
656 | */ | |
08e0e7c8 DH |
657 | static inline struct afs_vnode *AFS_FS_I(struct inode *inode) |
658 | { | |
659 | return container_of(inode, struct afs_vnode, vfs_inode); | |
660 | } | |
661 | ||
662 | static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) | |
663 | { | |
664 | return &vnode->vfs_inode; | |
665 | } | |
666 | ||
260a9803 DH |
667 | extern void afs_vnode_finalise_status_update(struct afs_vnode *, |
668 | struct afs_server *); | |
00d3b7a4 DH |
669 | extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *, |
670 | struct key *); | |
671 | extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *, | |
196ee9cd | 672 | struct afs_read *); |
260a9803 DH |
673 | extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *, |
674 | umode_t, struct afs_fid *, struct afs_file_status *, | |
675 | struct afs_callback *, struct afs_server **); | |
676 | extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *, | |
677 | bool); | |
678 | extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *, | |
679 | const char *); | |
680 | extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *, | |
681 | const char *, struct afs_fid *, | |
682 | struct afs_file_status *, struct afs_server **); | |
683 | extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *, | |
684 | struct key *, const char *, const char *); | |
31143d5d DH |
685 | extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t, |
686 | unsigned, unsigned); | |
687 | extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *); | |
45222b9e DH |
688 | extern int afs_vnode_get_volume_status(struct afs_vnode *, struct key *, |
689 | struct afs_volume_status *); | |
e8d6c554 DH |
690 | extern int afs_vnode_set_lock(struct afs_vnode *, struct key *, |
691 | afs_lock_type_t); | |
692 | extern int afs_vnode_extend_lock(struct afs_vnode *, struct key *); | |
693 | extern int afs_vnode_release_lock(struct afs_vnode *, struct key *); | |
08e0e7c8 DH |
694 | |
695 | /* | |
696 | * volume.c | |
697 | */ | |
08e0e7c8 DH |
698 | #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0) |
699 | ||
700 | extern void afs_put_volume(struct afs_volume *); | |
00d3b7a4 | 701 | extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *); |
08e0e7c8 DH |
702 | extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *); |
703 | extern int afs_volume_release_fileserver(struct afs_vnode *, | |
704 | struct afs_server *, int); | |
705 | ||
31143d5d DH |
706 | /* |
707 | * write.c | |
708 | */ | |
709 | extern int afs_set_page_dirty(struct page *); | |
710 | extern void afs_put_writeback(struct afs_writeback *); | |
15b4650e NP |
711 | extern int afs_write_begin(struct file *file, struct address_space *mapping, |
712 | loff_t pos, unsigned len, unsigned flags, | |
713 | struct page **pagep, void **fsdata); | |
714 | extern int afs_write_end(struct file *file, struct address_space *mapping, | |
715 | loff_t pos, unsigned len, unsigned copied, | |
716 | struct page *page, void *fsdata); | |
31143d5d DH |
717 | extern int afs_writepage(struct page *, struct writeback_control *); |
718 | extern int afs_writepages(struct address_space *, struct writeback_control *); | |
31143d5d | 719 | extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); |
50b5551d | 720 | extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); |
31143d5d | 721 | extern int afs_writeback_all(struct afs_vnode *); |
02c24a82 | 722 | extern int afs_fsync(struct file *, loff_t, loff_t, int); |
31143d5d DH |
723 | |
724 | ||
08e0e7c8 DH |
725 | /*****************************************************************************/ |
726 | /* | |
727 | * debug tracing | |
728 | */ | |
8e8d7f13 DH |
729 | #include <trace/events/afs.h> |
730 | ||
08e0e7c8 DH |
731 | extern unsigned afs_debug; |
732 | ||
733 | #define dbgprintk(FMT,...) \ | |
ad16df84 | 734 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
08e0e7c8 | 735 | |
530b6412 HH |
736 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
737 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
08e0e7c8 DH |
738 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
739 | ||
740 | ||
741 | #if defined(__KDEBUG) | |
742 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
743 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
744 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
745 | ||
746 | #elif defined(CONFIG_AFS_DEBUG) | |
747 | #define AFS_DEBUG_KENTER 0x01 | |
748 | #define AFS_DEBUG_KLEAVE 0x02 | |
749 | #define AFS_DEBUG_KDEBUG 0x04 | |
750 | ||
751 | #define _enter(FMT,...) \ | |
752 | do { \ | |
753 | if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ | |
754 | kenter(FMT,##__VA_ARGS__); \ | |
755 | } while (0) | |
756 | ||
757 | #define _leave(FMT,...) \ | |
758 | do { \ | |
759 | if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ | |
760 | kleave(FMT,##__VA_ARGS__); \ | |
761 | } while (0) | |
762 | ||
763 | #define _debug(FMT,...) \ | |
764 | do { \ | |
765 | if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ | |
766 | kdebug(FMT,##__VA_ARGS__); \ | |
767 | } while (0) | |
768 | ||
769 | #else | |
12fdff3f DH |
770 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
771 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
772 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
08e0e7c8 DH |
773 | #endif |
774 | ||
775 | /* | |
776 | * debug assertion checking | |
777 | */ | |
778 | #if 1 // defined(__KDEBUGALL) | |
779 | ||
780 | #define ASSERT(X) \ | |
781 | do { \ | |
782 | if (unlikely(!(X))) { \ | |
783 | printk(KERN_ERR "\n"); \ | |
784 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
785 | BUG(); \ | |
786 | } \ | |
787 | } while(0) | |
788 | ||
789 | #define ASSERTCMP(X, OP, Y) \ | |
790 | do { \ | |
791 | if (unlikely(!((X) OP (Y)))) { \ | |
792 | printk(KERN_ERR "\n"); \ | |
793 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
794 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
795 | (unsigned long)(X), (unsigned long)(Y)); \ | |
796 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
797 | (unsigned long)(X), (unsigned long)(Y)); \ | |
798 | BUG(); \ | |
799 | } \ | |
800 | } while(0) | |
801 | ||
416351f2 DH |
802 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
803 | do { \ | |
804 | if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ | |
805 | printk(KERN_ERR "\n"); \ | |
806 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
807 | printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ | |
808 | (unsigned long)(L), (unsigned long)(N), \ | |
809 | (unsigned long)(H)); \ | |
810 | printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ | |
811 | (unsigned long)(L), (unsigned long)(N), \ | |
812 | (unsigned long)(H)); \ | |
813 | BUG(); \ | |
814 | } \ | |
815 | } while(0) | |
816 | ||
08e0e7c8 DH |
817 | #define ASSERTIF(C, X) \ |
818 | do { \ | |
819 | if (unlikely((C) && !(X))) { \ | |
820 | printk(KERN_ERR "\n"); \ | |
821 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
822 | BUG(); \ | |
823 | } \ | |
824 | } while(0) | |
825 | ||
826 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
827 | do { \ | |
828 | if (unlikely((C) && !((X) OP (Y)))) { \ | |
829 | printk(KERN_ERR "\n"); \ | |
830 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
831 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
832 | (unsigned long)(X), (unsigned long)(Y)); \ | |
833 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
834 | (unsigned long)(X), (unsigned long)(Y)); \ | |
835 | BUG(); \ | |
836 | } \ | |
837 | } while(0) | |
838 | ||
839 | #else | |
840 | ||
841 | #define ASSERT(X) \ | |
842 | do { \ | |
843 | } while(0) | |
844 | ||
845 | #define ASSERTCMP(X, OP, Y) \ | |
846 | do { \ | |
847 | } while(0) | |
848 | ||
416351f2 DH |
849 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
850 | do { \ | |
851 | } while(0) | |
852 | ||
08e0e7c8 DH |
853 | #define ASSERTIF(C, X) \ |
854 | do { \ | |
855 | } while(0) | |
856 | ||
857 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
858 | do { \ | |
859 | } while(0) | |
860 | ||
861 | #endif /* __KDEBUGALL */ |