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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> | |
8a79790b | 14 | #include <linux/ktime.h> |
1da177e4 LT |
15 | #include <linux/fs.h> |
16 | #include <linux/pagemap.h> | |
08e0e7c8 | 17 | #include <linux/rxrpc.h> |
00d3b7a4 | 18 | #include <linux/key.h> |
e8edc6e0 | 19 | #include <linux/workqueue.h> |
00c541ea | 20 | #include <linux/sched.h> |
80e50be4 | 21 | #include <linux/fscache.h> |
e1da0222 | 22 | #include <linux/backing-dev.h> |
ff548773 | 23 | #include <linux/uuid.h> |
8324f0bc | 24 | #include <net/af_rxrpc.h> |
00c541ea | 25 | |
08e0e7c8 DH |
26 | #include "afs.h" |
27 | #include "afs_vl.h" | |
28 | ||
29 | #define AFS_CELL_MAX_ADDRS 15 | |
30 | ||
31143d5d | 31 | struct pagevec; |
08e0e7c8 DH |
32 | struct afs_call; |
33 | ||
34 | typedef enum { | |
35 | AFS_VL_NEW, /* new, uninitialised record */ | |
36 | AFS_VL_CREATING, /* creating record */ | |
37 | AFS_VL_VALID, /* record is pending */ | |
38 | AFS_VL_NO_VOLUME, /* no such volume available */ | |
39 | AFS_VL_UPDATING, /* update in progress */ | |
40 | AFS_VL_VOLUME_DELETED, /* volume was deleted */ | |
41 | AFS_VL_UNCERTAIN, /* uncertain state (update failed) */ | |
42 | } __attribute__((packed)) afs_vlocation_state_t; | |
1da177e4 | 43 | |
00d3b7a4 DH |
44 | struct afs_mount_params { |
45 | bool rwpath; /* T if the parent should be considered R/W */ | |
46 | bool force; /* T to force cell type */ | |
bec5eb61 | 47 | bool autocell; /* T if set auto mount operation */ |
00d3b7a4 DH |
48 | afs_voltype_t type; /* type of volume requested */ |
49 | int volnamesz; /* size of volume name */ | |
50 | const char *volname; /* name of volume to mount */ | |
51 | struct afs_cell *cell; /* cell in which to find volume */ | |
52 | struct afs_volume *volume; /* volume record */ | |
53 | struct key *key; /* key to use for secure mounting */ | |
54 | }; | |
55 | ||
8e8d7f13 DH |
56 | enum afs_call_state { |
57 | AFS_CALL_REQUESTING, /* request is being sent for outgoing call */ | |
58 | AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */ | |
59 | AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */ | |
60 | AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */ | |
61 | AFS_CALL_REPLYING, /* replying to incoming call */ | |
62 | AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */ | |
63 | AFS_CALL_COMPLETE, /* Completed or failed */ | |
64 | }; | |
08e0e7c8 DH |
65 | /* |
66 | * a record of an in-progress RxRPC call | |
67 | */ | |
68 | struct afs_call { | |
69 | const struct afs_call_type *type; /* type of call */ | |
08e0e7c8 | 70 | wait_queue_head_t waitq; /* processes awaiting completion */ |
341f741f | 71 | struct work_struct async_work; /* async I/O processor */ |
08e0e7c8 | 72 | struct work_struct work; /* actual work processor */ |
08e0e7c8 DH |
73 | struct rxrpc_call *rxcall; /* RxRPC call handle */ |
74 | struct key *key; /* security for this call */ | |
75 | struct afs_server *server; /* server affected by incoming CM call */ | |
76 | void *request; /* request data (first part) */ | |
31143d5d DH |
77 | struct address_space *mapping; /* page set */ |
78 | struct afs_writeback *wb; /* writeback being performed */ | |
08e0e7c8 DH |
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) */ |
31143d5d DH |
84 | pgoff_t first; /* first page in mapping to deal with */ |
85 | pgoff_t last; /* last page in mapping to deal with */ | |
d001648e | 86 | size_t offset; /* offset into received data store */ |
341f741f | 87 | atomic_t usage; |
8e8d7f13 | 88 | enum afs_call_state state; |
08e0e7c8 | 89 | int error; /* error code */ |
d001648e | 90 | u32 abort_code; /* Remote abort ID or 0 */ |
08e0e7c8 DH |
91 | unsigned request_size; /* size of request data */ |
92 | unsigned reply_max; /* maximum size of reply */ | |
31143d5d | 93 | unsigned first_offset; /* offset into mapping[first] */ |
bcd89270 MD |
94 | union { |
95 | unsigned last_to; /* amount of mapping[last] */ | |
96 | unsigned count2; /* count used in unmarshalling */ | |
97 | }; | |
08e0e7c8 DH |
98 | unsigned char unmarshall; /* unmarshalling phase */ |
99 | bool incoming; /* T if incoming call */ | |
31143d5d | 100 | bool send_pages; /* T if data from mapping should be sent */ |
d001648e | 101 | bool need_attention; /* T if RxRPC poked us */ |
56ff9c83 | 102 | bool async; /* T if asynchronous */ |
08e0e7c8 DH |
103 | u16 service_id; /* RxRPC service ID to call */ |
104 | __be16 port; /* target UDP port */ | |
50a2c953 | 105 | u32 operation_ID; /* operation ID for an incoming call */ |
08e0e7c8 DH |
106 | u32 count; /* count for use in unmarshalling */ |
107 | __be32 tmp; /* place to extract temporary data */ | |
31143d5d | 108 | afs_dataversion_t store_version; /* updated version expected from store */ |
08e0e7c8 DH |
109 | }; |
110 | ||
111 | struct afs_call_type { | |
00d3b7a4 DH |
112 | const char *name; |
113 | ||
08e0e7c8 DH |
114 | /* deliver request or reply data to an call |
115 | * - returning an error will cause the call to be aborted | |
116 | */ | |
d001648e | 117 | int (*deliver)(struct afs_call *call); |
08e0e7c8 DH |
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); | |
341f741f DH |
124 | |
125 | /* Work function */ | |
126 | void (*work)(struct work_struct *work); | |
08e0e7c8 DH |
127 | }; |
128 | ||
196ee9cd DH |
129 | /* |
130 | * Record of an outstanding read operation on a vnode. | |
131 | */ | |
132 | struct afs_read { | |
133 | loff_t pos; /* Where to start reading */ | |
e8e581a8 | 134 | loff_t len; /* How much we're asking for */ |
196ee9cd | 135 | loff_t actual_len; /* How much we're actually getting */ |
6a0e3999 | 136 | loff_t remain; /* Amount remaining */ |
196ee9cd | 137 | atomic_t usage; |
196ee9cd | 138 | unsigned int index; /* Which page we're reading into */ |
196ee9cd DH |
139 | unsigned int nr_pages; |
140 | void (*page_done)(struct afs_call *, struct afs_read *); | |
141 | struct page *pages[]; | |
142 | }; | |
143 | ||
31143d5d DH |
144 | /* |
145 | * record of an outstanding writeback on a vnode | |
146 | */ | |
147 | struct afs_writeback { | |
148 | struct list_head link; /* link in vnode->writebacks */ | |
149 | struct work_struct writer; /* work item to perform the writeback */ | |
150 | struct afs_vnode *vnode; /* vnode to which this write applies */ | |
151 | struct key *key; /* owner of this write */ | |
152 | wait_queue_head_t waitq; /* completion and ready wait queue */ | |
153 | pgoff_t first; /* first page in batch */ | |
154 | pgoff_t point; /* last page in current store op */ | |
155 | pgoff_t last; /* last page in batch (inclusive) */ | |
156 | unsigned offset_first; /* offset into first page of start of write */ | |
157 | unsigned to_last; /* offset into last page of end of write */ | |
158 | int num_conflicts; /* count of conflicting writes in list */ | |
159 | int usage; | |
160 | bool conflicts; /* T if has dependent conflicts */ | |
161 | enum { | |
162 | AFS_WBACK_SYNCING, /* synchronisation being performed */ | |
163 | AFS_WBACK_PENDING, /* write pending */ | |
164 | AFS_WBACK_CONFLICTING, /* conflicting writes posted */ | |
165 | AFS_WBACK_WRITING, /* writing back */ | |
166 | AFS_WBACK_COMPLETE /* the writeback record has been unlinked */ | |
167 | } state __attribute__((packed)); | |
168 | }; | |
169 | ||
08e0e7c8 DH |
170 | /* |
171 | * AFS superblock private data | |
172 | * - there's one superblock per volume | |
173 | */ | |
174 | struct afs_super_info { | |
175 | struct afs_volume *volume; /* volume record */ | |
176 | char rwparent; /* T if parent is R/W AFS volume */ | |
177 | }; | |
1da177e4 | 178 | |
08e0e7c8 DH |
179 | static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
180 | { | |
181 | return sb->s_fs_info; | |
1da177e4 LT |
182 | } |
183 | ||
08e0e7c8 DH |
184 | extern struct file_system_type afs_fs_type; |
185 | ||
186 | /* | |
187 | * entry in the cached cell catalogue | |
188 | */ | |
189 | struct afs_cache_cell { | |
00d3b7a4 DH |
190 | char name[AFS_MAXCELLNAME]; /* cell name (padded with NULs) */ |
191 | struct in_addr vl_servers[15]; /* cached cell VL servers */ | |
08e0e7c8 DH |
192 | }; |
193 | ||
194 | /* | |
195 | * AFS cell record | |
196 | */ | |
197 | struct afs_cell { | |
198 | atomic_t usage; | |
199 | struct list_head link; /* main cell list link */ | |
00d3b7a4 | 200 | struct key *anonymous_key; /* anonymous user key for this cell */ |
08e0e7c8 | 201 | struct list_head proc_link; /* /proc cell list link */ |
9b3f26c9 DH |
202 | #ifdef CONFIG_AFS_FSCACHE |
203 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 DH |
204 | #endif |
205 | ||
206 | /* server record management */ | |
207 | rwlock_t servers_lock; /* active server list lock */ | |
208 | struct list_head servers; /* active server list */ | |
209 | ||
210 | /* volume location record management */ | |
211 | struct rw_semaphore vl_sem; /* volume management serialisation semaphore */ | |
212 | struct list_head vl_list; /* cell's active VL record list */ | |
213 | spinlock_t vl_lock; /* vl_list lock */ | |
214 | unsigned short vl_naddrs; /* number of VL servers in addr list */ | |
215 | unsigned short vl_curr_svix; /* current server index */ | |
216 | struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */ | |
217 | ||
218 | char name[0]; /* cell name - must go last */ | |
219 | }; | |
220 | ||
221 | /* | |
222 | * entry in the cached volume location catalogue | |
223 | */ | |
224 | struct afs_cache_vlocation { | |
00d3b7a4 DH |
225 | /* volume name (lowercase, padded with NULs) */ |
226 | uint8_t name[AFS_MAXVOLNAME + 1]; | |
227 | ||
08e0e7c8 DH |
228 | uint8_t nservers; /* number of entries used in servers[] */ |
229 | uint8_t vidmask; /* voltype mask for vid[] */ | |
230 | uint8_t srvtmask[8]; /* voltype masks for servers[] */ | |
231 | #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ | |
232 | #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ | |
233 | #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ | |
234 | ||
235 | afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */ | |
236 | struct in_addr servers[8]; /* fileserver addresses */ | |
237 | time_t rtime; /* last retrieval time */ | |
238 | }; | |
239 | ||
240 | /* | |
241 | * volume -> vnode hash table entry | |
242 | */ | |
243 | struct afs_cache_vhash { | |
244 | afs_voltype_t vtype; /* which volume variation */ | |
245 | uint8_t hash_bucket; /* which hash bucket this represents */ | |
246 | } __attribute__((packed)); | |
247 | ||
248 | /* | |
249 | * AFS volume location record | |
250 | */ | |
251 | struct afs_vlocation { | |
252 | atomic_t usage; | |
8a79790b | 253 | time64_t time_of_death; /* time at which put reduced usage to 0 */ |
08e0e7c8 DH |
254 | struct list_head link; /* link in cell volume location list */ |
255 | struct list_head grave; /* link in master graveyard list */ | |
256 | struct list_head update; /* link in master update list */ | |
257 | struct afs_cell *cell; /* cell to which volume belongs */ | |
9b3f26c9 DH |
258 | #ifdef CONFIG_AFS_FSCACHE |
259 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 DH |
260 | #endif |
261 | struct afs_cache_vlocation vldb; /* volume information DB record */ | |
262 | struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ | |
263 | wait_queue_head_t waitq; /* status change waitqueue */ | |
8a79790b | 264 | time64_t update_at; /* time at which record should be updated */ |
39bf0949 | 265 | spinlock_t lock; /* access lock */ |
08e0e7c8 DH |
266 | afs_vlocation_state_t state; /* volume location state */ |
267 | unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ | |
268 | unsigned short upd_busy_cnt; /* EBUSY count during update */ | |
269 | bool valid; /* T if valid */ | |
270 | }; | |
271 | ||
272 | /* | |
273 | * AFS fileserver record | |
274 | */ | |
275 | struct afs_server { | |
276 | atomic_t usage; | |
8a79790b | 277 | time64_t time_of_death; /* time at which put reduced usage to 0 */ |
08e0e7c8 DH |
278 | struct in_addr addr; /* server address */ |
279 | struct afs_cell *cell; /* cell in which server resides */ | |
280 | struct list_head link; /* link in cell's server list */ | |
281 | struct list_head grave; /* link in master graveyard list */ | |
282 | struct rb_node master_rb; /* link in master by-addr tree */ | |
283 | struct rw_semaphore sem; /* access lock */ | |
284 | ||
285 | /* file service access */ | |
286 | struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */ | |
287 | unsigned long fs_act_jif; /* time at which last activity occurred */ | |
288 | unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ | |
289 | spinlock_t fs_lock; /* access lock */ | |
290 | int fs_state; /* 0 or reason FS currently marked dead (-errno) */ | |
291 | ||
292 | /* callback promise management */ | |
293 | struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */ | |
294 | struct delayed_work cb_updater; /* callback updater */ | |
295 | struct delayed_work cb_break_work; /* collected break dispatcher */ | |
296 | wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */ | |
297 | spinlock_t cb_lock; /* access lock */ | |
298 | struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */ | |
299 | atomic_t cb_break_n; /* number of pending breaks */ | |
300 | u8 cb_break_head; /* head of callback breaking ring */ | |
301 | u8 cb_break_tail; /* tail of callback breaking ring */ | |
302 | }; | |
303 | ||
304 | /* | |
305 | * AFS volume access record | |
306 | */ | |
307 | struct afs_volume { | |
308 | atomic_t usage; | |
309 | struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */ | |
310 | struct afs_vlocation *vlocation; /* volume location */ | |
9b3f26c9 DH |
311 | #ifdef CONFIG_AFS_FSCACHE |
312 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 DH |
313 | #endif |
314 | afs_volid_t vid; /* volume ID */ | |
315 | afs_voltype_t type; /* type of volume */ | |
316 | char type_force; /* force volume type (suppress R/O -> R/W) */ | |
317 | unsigned short nservers; /* number of server slots filled */ | |
318 | unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */ | |
319 | struct afs_server *servers[8]; /* servers on which volume resides (ordered) */ | |
320 | struct rw_semaphore server_sem; /* lock for accessing current server */ | |
e1da0222 | 321 | struct backing_dev_info bdi; |
08e0e7c8 DH |
322 | }; |
323 | ||
324 | /* | |
325 | * vnode catalogue entry | |
326 | */ | |
327 | struct afs_cache_vnode { | |
328 | afs_vnodeid_t vnode_id; /* vnode ID */ | |
329 | unsigned vnode_unique; /* vnode ID uniquifier */ | |
330 | afs_dataversion_t data_version; /* data version */ | |
331 | }; | |
332 | ||
333 | /* | |
334 | * AFS inode private data | |
335 | */ | |
336 | struct afs_vnode { | |
337 | struct inode vfs_inode; /* the VFS's inode record */ | |
338 | ||
339 | struct afs_volume *volume; /* volume on which vnode resides */ | |
340 | struct afs_server *server; /* server currently supplying this file */ | |
341 | struct afs_fid fid; /* the file identifier for this inode */ | |
342 | struct afs_file_status status; /* AFS status info for this file */ | |
9b3f26c9 DH |
343 | #ifdef CONFIG_AFS_FSCACHE |
344 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 345 | #endif |
00d3b7a4 DH |
346 | struct afs_permits *permits; /* cache of permits so far obtained */ |
347 | struct mutex permits_lock; /* lock for altering permits list */ | |
260a9803 | 348 | struct mutex validate_lock; /* lock for validating this vnode */ |
08e0e7c8 | 349 | wait_queue_head_t update_waitq; /* status fetch waitqueue */ |
260a9803 | 350 | int update_cnt; /* number of outstanding ops that will update the |
08e0e7c8 | 351 | * status */ |
31143d5d | 352 | spinlock_t writeback_lock; /* lock for writebacks */ |
08e0e7c8 DH |
353 | spinlock_t lock; /* waitqueue/flags lock */ |
354 | unsigned long flags; | |
355 | #define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */ | |
260a9803 | 356 | #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
08e0e7c8 DH |
357 | #define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */ |
358 | #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ | |
359 | #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ | |
360 | #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ | |
e8d6c554 DH |
361 | #define AFS_VNODE_LOCKING 6 /* set if waiting for lock on vnode */ |
362 | #define AFS_VNODE_READLOCKED 7 /* set if vnode is read-locked on the server */ | |
363 | #define AFS_VNODE_WRITELOCKED 8 /* set if vnode is write-locked on the server */ | |
364 | #define AFS_VNODE_UNLOCKING 9 /* set if vnode is being unlocked on the server */ | |
bec5eb61 | 365 | #define AFS_VNODE_AUTOCELL 10 /* set if Vnode is an auto mount point */ |
366 | #define AFS_VNODE_PSEUDODIR 11 /* set if Vnode is a pseudo directory */ | |
08e0e7c8 | 367 | |
00d3b7a4 DH |
368 | long acl_order; /* ACL check count (callback break count) */ |
369 | ||
31143d5d | 370 | struct list_head writebacks; /* alterations in pagecache that need writing */ |
e8d6c554 DH |
371 | struct list_head pending_locks; /* locks waiting to be granted */ |
372 | struct list_head granted_locks; /* locks granted on this file */ | |
373 | struct delayed_work lock_work; /* work to be done in locking */ | |
374 | struct key *unlock_key; /* key to be used in unlocking */ | |
31143d5d | 375 | |
08e0e7c8 DH |
376 | /* outstanding callback notification on this file */ |
377 | struct rb_node server_rb; /* link in server->fs_vnodes */ | |
378 | struct rb_node cb_promise; /* link in server->cb_promises */ | |
379 | struct work_struct cb_broken_work; /* work to be done on callback break */ | |
56e71431 TR |
380 | time64_t cb_expires; /* time at which callback expires */ |
381 | time64_t cb_expires_at; /* time used to order cb_promise */ | |
08e0e7c8 DH |
382 | unsigned cb_version; /* callback version */ |
383 | unsigned cb_expiry; /* callback expiry time */ | |
384 | afs_callback_type_t cb_type; /* type of callback */ | |
385 | bool cb_promised; /* true if promise still holds */ | |
386 | }; | |
387 | ||
00d3b7a4 DH |
388 | /* |
389 | * cached security record for one user's attempt to access a vnode | |
390 | */ | |
391 | struct afs_permit { | |
392 | struct key *key; /* RxRPC ticket holding a security context */ | |
393 | afs_access_t access_mask; /* access mask for this key */ | |
394 | }; | |
395 | ||
396 | /* | |
397 | * cache of security records from attempts to access a vnode | |
398 | */ | |
399 | struct afs_permits { | |
400 | struct rcu_head rcu; /* disposal procedure */ | |
401 | int count; /* number of records */ | |
402 | struct afs_permit permits[0]; /* the permits so far examined */ | |
403 | }; | |
404 | ||
b908fe6b DH |
405 | /* |
406 | * record of one of a system's set of network interfaces | |
407 | */ | |
408 | struct afs_interface { | |
b908fe6b DH |
409 | struct in_addr address; /* IPv4 address bound to interface */ |
410 | struct in_addr netmask; /* netmask applied to address */ | |
411 | unsigned mtu; /* MTU of interface */ | |
412 | }; | |
413 | ||
08e0e7c8 | 414 | /*****************************************************************************/ |
9b3f26c9 DH |
415 | /* |
416 | * cache.c | |
417 | */ | |
418 | #ifdef CONFIG_AFS_FSCACHE | |
419 | extern struct fscache_netfs afs_cache_netfs; | |
420 | extern struct fscache_cookie_def afs_cell_cache_index_def; | |
421 | extern struct fscache_cookie_def afs_vlocation_cache_index_def; | |
422 | extern struct fscache_cookie_def afs_volume_cache_index_def; | |
423 | extern struct fscache_cookie_def afs_vnode_cache_index_def; | |
424 | #else | |
425 | #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
426 | #define afs_vlocation_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
427 | #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
428 | #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
429 | #endif | |
430 | ||
08e0e7c8 DH |
431 | /* |
432 | * callback.c | |
433 | */ | |
434 | extern void afs_init_callback_state(struct afs_server *); | |
435 | extern void afs_broken_callback_work(struct work_struct *); | |
436 | extern void afs_break_callbacks(struct afs_server *, size_t, | |
437 | struct afs_callback[]); | |
260a9803 | 438 | extern void afs_discard_callback_on_delete(struct afs_vnode *); |
08e0e7c8 DH |
439 | extern void afs_give_up_callback(struct afs_vnode *); |
440 | extern void afs_dispatch_give_up_callbacks(struct work_struct *); | |
441 | extern void afs_flush_callback_breaks(struct afs_server *); | |
442 | extern int __init afs_callback_update_init(void); | |
fbb3fcba | 443 | extern void afs_callback_update_kill(void); |
08e0e7c8 | 444 | |
1da177e4 LT |
445 | /* |
446 | * cell.c | |
447 | */ | |
448 | extern struct rw_semaphore afs_proc_cells_sem; | |
449 | extern struct list_head afs_proc_cells; | |
1da177e4 | 450 | |
08e0e7c8 DH |
451 | #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0) |
452 | extern int afs_cell_init(char *); | |
bec5eb61 | 453 | extern struct afs_cell *afs_cell_create(const char *, unsigned, char *, bool); |
454 | extern struct afs_cell *afs_cell_lookup(const char *, unsigned, bool); | |
08e0e7c8 DH |
455 | extern struct afs_cell *afs_grab_cell(struct afs_cell *); |
456 | extern void afs_put_cell(struct afs_cell *); | |
457 | extern void afs_cell_purge(void); | |
458 | ||
459 | /* | |
460 | * cmservice.c | |
461 | */ | |
462 | extern bool afs_cm_incoming_call(struct afs_call *); | |
463 | ||
1da177e4 LT |
464 | /* |
465 | * dir.c | |
466 | */ | |
754661f1 | 467 | extern const struct inode_operations afs_dir_inode_operations; |
d61dcce2 | 468 | extern const struct dentry_operations afs_fs_dentry_operations; |
4b6f5d20 | 469 | extern const struct file_operations afs_dir_file_operations; |
1da177e4 LT |
470 | |
471 | /* | |
472 | * file.c | |
473 | */ | |
f5e54d6e | 474 | extern const struct address_space_operations afs_fs_aops; |
754661f1 | 475 | extern const struct inode_operations afs_file_inode_operations; |
00d3b7a4 DH |
476 | extern const struct file_operations afs_file_operations; |
477 | ||
478 | extern int afs_open(struct inode *, struct file *); | |
479 | extern int afs_release(struct inode *, struct file *); | |
f6d335c0 | 480 | extern int afs_page_filler(void *, struct page *); |
196ee9cd | 481 | extern void afs_put_read(struct afs_read *); |
1da177e4 | 482 | |
e8d6c554 DH |
483 | /* |
484 | * flock.c | |
485 | */ | |
486 | extern void __exit afs_kill_lock_manager(void); | |
487 | extern void afs_lock_work(struct work_struct *); | |
488 | extern void afs_lock_may_be_available(struct afs_vnode *); | |
489 | extern int afs_lock(struct file *, int, struct file_lock *); | |
490 | extern int afs_flock(struct file *, int, struct file_lock *); | |
491 | ||
08e0e7c8 DH |
492 | /* |
493 | * fsclient.c | |
494 | */ | |
00d3b7a4 DH |
495 | extern int afs_fs_fetch_file_status(struct afs_server *, struct key *, |
496 | struct afs_vnode *, struct afs_volsync *, | |
56ff9c83 DH |
497 | bool); |
498 | extern int afs_fs_give_up_callbacks(struct afs_server *, bool); | |
00d3b7a4 | 499 | extern int afs_fs_fetch_data(struct afs_server *, struct key *, |
56ff9c83 | 500 | struct afs_vnode *, struct afs_read *, bool); |
260a9803 DH |
501 | extern int afs_fs_create(struct afs_server *, struct key *, |
502 | struct afs_vnode *, const char *, umode_t, | |
503 | struct afs_fid *, struct afs_file_status *, | |
56ff9c83 | 504 | struct afs_callback *, bool); |
260a9803 | 505 | extern int afs_fs_remove(struct afs_server *, struct key *, |
56ff9c83 | 506 | struct afs_vnode *, const char *, bool, bool); |
260a9803 | 507 | extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *, |
56ff9c83 | 508 | struct afs_vnode *, const char *, bool); |
260a9803 DH |
509 | extern int afs_fs_symlink(struct afs_server *, struct key *, |
510 | struct afs_vnode *, const char *, const char *, | |
56ff9c83 | 511 | struct afs_fid *, struct afs_file_status *, bool); |
260a9803 DH |
512 | extern int afs_fs_rename(struct afs_server *, struct key *, |
513 | struct afs_vnode *, const char *, | |
56ff9c83 | 514 | struct afs_vnode *, const char *, bool); |
31143d5d | 515 | extern int afs_fs_store_data(struct afs_server *, struct afs_writeback *, |
56ff9c83 | 516 | pgoff_t, pgoff_t, unsigned, unsigned, bool); |
31143d5d | 517 | extern int afs_fs_setattr(struct afs_server *, struct key *, |
56ff9c83 | 518 | struct afs_vnode *, struct iattr *, bool); |
45222b9e DH |
519 | extern int afs_fs_get_volume_status(struct afs_server *, struct key *, |
520 | struct afs_vnode *, | |
56ff9c83 | 521 | struct afs_volume_status *, bool); |
e8d6c554 | 522 | extern int afs_fs_set_lock(struct afs_server *, struct key *, |
56ff9c83 | 523 | struct afs_vnode *, afs_lock_type_t, bool); |
e8d6c554 | 524 | extern int afs_fs_extend_lock(struct afs_server *, struct key *, |
56ff9c83 | 525 | struct afs_vnode *, bool); |
e8d6c554 | 526 | extern int afs_fs_release_lock(struct afs_server *, struct key *, |
56ff9c83 | 527 | struct afs_vnode *, bool); |
08e0e7c8 | 528 | |
1da177e4 LT |
529 | /* |
530 | * inode.c | |
531 | */ | |
bec5eb61 | 532 | extern struct inode *afs_iget_autocell(struct inode *, const char *, int, |
533 | struct key *); | |
00d3b7a4 | 534 | extern struct inode *afs_iget(struct super_block *, struct key *, |
260a9803 DH |
535 | struct afs_fid *, struct afs_file_status *, |
536 | struct afs_callback *); | |
416351f2 | 537 | extern void afs_zap_data(struct afs_vnode *); |
260a9803 | 538 | extern int afs_validate(struct afs_vnode *, struct key *); |
a528d35e | 539 | extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); |
31143d5d | 540 | extern int afs_setattr(struct dentry *, struct iattr *); |
b57922d9 | 541 | extern void afs_evict_inode(struct inode *); |
bec5eb61 | 542 | extern int afs_drop_inode(struct inode *); |
1da177e4 LT |
543 | |
544 | /* | |
545 | * main.c | |
546 | */ | |
0ad53eee | 547 | extern struct workqueue_struct *afs_wq; |
ff548773 | 548 | extern struct uuid_v1 afs_uuid; |
1da177e4 | 549 | |
08e0e7c8 DH |
550 | /* |
551 | * misc.c | |
552 | */ | |
553 | extern int afs_abort_to_error(u32); | |
554 | ||
1da177e4 LT |
555 | /* |
556 | * mntpt.c | |
557 | */ | |
754661f1 | 558 | extern const struct inode_operations afs_mntpt_inode_operations; |
bec5eb61 | 559 | extern const struct inode_operations afs_autocell_inode_operations; |
4b6f5d20 | 560 | extern const struct file_operations afs_mntpt_file_operations; |
1da177e4 | 561 | |
d18610b0 | 562 | extern struct vfsmount *afs_d_automount(struct path *); |
08e0e7c8 | 563 | extern void afs_mntpt_kill_timer(void); |
1da177e4 | 564 | |
b4db2b35 AB |
565 | /* |
566 | * netdevices.c | |
567 | */ | |
568 | extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); | |
569 | ||
1da177e4 LT |
570 | /* |
571 | * proc.c | |
572 | */ | |
573 | extern int afs_proc_init(void); | |
574 | extern void afs_proc_cleanup(void); | |
ec26815a DH |
575 | extern int afs_proc_cell_setup(struct afs_cell *); |
576 | extern void afs_proc_cell_remove(struct afs_cell *); | |
1da177e4 | 577 | |
08e0e7c8 DH |
578 | /* |
579 | * rxrpc.c | |
580 | */ | |
8324f0bc | 581 | extern struct socket *afs_socket; |
341f741f | 582 | extern atomic_t afs_outstanding_calls; |
8324f0bc | 583 | |
08e0e7c8 DH |
584 | extern int afs_open_socket(void); |
585 | extern void afs_close_socket(void); | |
341f741f DH |
586 | extern void afs_put_call(struct afs_call *); |
587 | extern int afs_queue_call_work(struct afs_call *); | |
56ff9c83 | 588 | extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t, bool); |
08e0e7c8 DH |
589 | extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *, |
590 | size_t, size_t); | |
591 | extern void afs_flat_call_destructor(struct afs_call *); | |
08e0e7c8 | 592 | extern void afs_send_empty_reply(struct afs_call *); |
b908fe6b | 593 | extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); |
d001648e | 594 | extern int afs_extract_data(struct afs_call *, void *, size_t, bool); |
08e0e7c8 | 595 | |
d001648e | 596 | static inline int afs_transfer_reply(struct afs_call *call) |
372ee163 | 597 | { |
d001648e | 598 | return afs_extract_data(call, call->buffer, call->reply_max, false); |
372ee163 DH |
599 | } |
600 | ||
00d3b7a4 DH |
601 | /* |
602 | * security.c | |
603 | */ | |
604 | extern void afs_clear_permits(struct afs_vnode *); | |
605 | extern void afs_cache_permit(struct afs_vnode *, struct key *, long); | |
416351f2 | 606 | extern void afs_zap_permits(struct rcu_head *); |
00d3b7a4 | 607 | extern struct key *afs_request_key(struct afs_cell *); |
10556cb2 | 608 | extern int afs_permission(struct inode *, int); |
00d3b7a4 | 609 | |
08e0e7c8 DH |
610 | /* |
611 | * server.c | |
612 | */ | |
613 | extern spinlock_t afs_server_peer_lock; | |
614 | ||
260a9803 DH |
615 | #define afs_get_server(S) \ |
616 | do { \ | |
617 | _debug("GET SERVER %d", atomic_read(&(S)->usage)); \ | |
618 | atomic_inc(&(S)->usage); \ | |
619 | } while(0) | |
08e0e7c8 DH |
620 | |
621 | extern struct afs_server *afs_lookup_server(struct afs_cell *, | |
622 | const struct in_addr *); | |
8324f0bc | 623 | extern struct afs_server *afs_find_server(const struct sockaddr_rxrpc *); |
08e0e7c8 DH |
624 | extern void afs_put_server(struct afs_server *); |
625 | extern void __exit afs_purge_servers(void); | |
626 | ||
00d3b7a4 DH |
627 | /* |
628 | * super.c | |
629 | */ | |
630 | extern int afs_fs_init(void); | |
631 | extern void afs_fs_exit(void); | |
632 | ||
08e0e7c8 DH |
633 | /* |
634 | * vlclient.c | |
635 | */ | |
00d3b7a4 DH |
636 | extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *, |
637 | const char *, struct afs_cache_vlocation *, | |
56ff9c83 | 638 | bool); |
00d3b7a4 DH |
639 | extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *, |
640 | afs_volid_t, afs_voltype_t, | |
56ff9c83 | 641 | struct afs_cache_vlocation *, bool); |
08e0e7c8 DH |
642 | |
643 | /* | |
644 | * vlocation.c | |
645 | */ | |
646 | #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0) | |
647 | ||
648 | extern int __init afs_vlocation_update_init(void); | |
649 | extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *, | |
00d3b7a4 | 650 | struct key *, |
08e0e7c8 DH |
651 | const char *, size_t); |
652 | extern void afs_put_vlocation(struct afs_vlocation *); | |
fbb3fcba | 653 | extern void afs_vlocation_purge(void); |
08e0e7c8 DH |
654 | |
655 | /* | |
656 | * vnode.c | |
657 | */ | |
08e0e7c8 DH |
658 | static inline struct afs_vnode *AFS_FS_I(struct inode *inode) |
659 | { | |
660 | return container_of(inode, struct afs_vnode, vfs_inode); | |
661 | } | |
662 | ||
663 | static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) | |
664 | { | |
665 | return &vnode->vfs_inode; | |
666 | } | |
667 | ||
260a9803 DH |
668 | extern void afs_vnode_finalise_status_update(struct afs_vnode *, |
669 | struct afs_server *); | |
00d3b7a4 DH |
670 | extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *, |
671 | struct key *); | |
672 | extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *, | |
196ee9cd | 673 | struct afs_read *); |
260a9803 DH |
674 | extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *, |
675 | umode_t, struct afs_fid *, struct afs_file_status *, | |
676 | struct afs_callback *, struct afs_server **); | |
677 | extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *, | |
678 | bool); | |
679 | extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *, | |
680 | const char *); | |
681 | extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *, | |
682 | const char *, struct afs_fid *, | |
683 | struct afs_file_status *, struct afs_server **); | |
684 | extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *, | |
685 | struct key *, const char *, const char *); | |
31143d5d DH |
686 | extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t, |
687 | unsigned, unsigned); | |
688 | extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *); | |
45222b9e DH |
689 | extern int afs_vnode_get_volume_status(struct afs_vnode *, struct key *, |
690 | struct afs_volume_status *); | |
e8d6c554 DH |
691 | extern int afs_vnode_set_lock(struct afs_vnode *, struct key *, |
692 | afs_lock_type_t); | |
693 | extern int afs_vnode_extend_lock(struct afs_vnode *, struct key *); | |
694 | extern int afs_vnode_release_lock(struct afs_vnode *, struct key *); | |
08e0e7c8 DH |
695 | |
696 | /* | |
697 | * volume.c | |
698 | */ | |
08e0e7c8 DH |
699 | #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0) |
700 | ||
701 | extern void afs_put_volume(struct afs_volume *); | |
00d3b7a4 | 702 | extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *); |
08e0e7c8 DH |
703 | extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *); |
704 | extern int afs_volume_release_fileserver(struct afs_vnode *, | |
705 | struct afs_server *, int); | |
706 | ||
31143d5d DH |
707 | /* |
708 | * write.c | |
709 | */ | |
710 | extern int afs_set_page_dirty(struct page *); | |
711 | extern void afs_put_writeback(struct afs_writeback *); | |
15b4650e NP |
712 | extern int afs_write_begin(struct file *file, struct address_space *mapping, |
713 | loff_t pos, unsigned len, unsigned flags, | |
714 | struct page **pagep, void **fsdata); | |
715 | extern int afs_write_end(struct file *file, struct address_space *mapping, | |
716 | loff_t pos, unsigned len, unsigned copied, | |
717 | struct page *page, void *fsdata); | |
31143d5d DH |
718 | extern int afs_writepage(struct page *, struct writeback_control *); |
719 | extern int afs_writepages(struct address_space *, struct writeback_control *); | |
31143d5d | 720 | extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); |
50b5551d | 721 | extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); |
31143d5d | 722 | extern int afs_writeback_all(struct afs_vnode *); |
58fed94d | 723 | extern int afs_flush(struct file *, fl_owner_t); |
02c24a82 | 724 | extern int afs_fsync(struct file *, loff_t, loff_t, int); |
31143d5d DH |
725 | |
726 | ||
08e0e7c8 DH |
727 | /*****************************************************************************/ |
728 | /* | |
729 | * debug tracing | |
730 | */ | |
8e8d7f13 DH |
731 | #include <trace/events/afs.h> |
732 | ||
08e0e7c8 DH |
733 | extern unsigned afs_debug; |
734 | ||
735 | #define dbgprintk(FMT,...) \ | |
ad16df84 | 736 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
08e0e7c8 | 737 | |
530b6412 HH |
738 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
739 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
08e0e7c8 DH |
740 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
741 | ||
742 | ||
743 | #if defined(__KDEBUG) | |
744 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
745 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
746 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
747 | ||
748 | #elif defined(CONFIG_AFS_DEBUG) | |
749 | #define AFS_DEBUG_KENTER 0x01 | |
750 | #define AFS_DEBUG_KLEAVE 0x02 | |
751 | #define AFS_DEBUG_KDEBUG 0x04 | |
752 | ||
753 | #define _enter(FMT,...) \ | |
754 | do { \ | |
755 | if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ | |
756 | kenter(FMT,##__VA_ARGS__); \ | |
757 | } while (0) | |
758 | ||
759 | #define _leave(FMT,...) \ | |
760 | do { \ | |
761 | if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ | |
762 | kleave(FMT,##__VA_ARGS__); \ | |
763 | } while (0) | |
764 | ||
765 | #define _debug(FMT,...) \ | |
766 | do { \ | |
767 | if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ | |
768 | kdebug(FMT,##__VA_ARGS__); \ | |
769 | } while (0) | |
770 | ||
771 | #else | |
12fdff3f DH |
772 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
773 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
774 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
08e0e7c8 DH |
775 | #endif |
776 | ||
777 | /* | |
778 | * debug assertion checking | |
779 | */ | |
780 | #if 1 // defined(__KDEBUGALL) | |
781 | ||
782 | #define ASSERT(X) \ | |
783 | do { \ | |
784 | if (unlikely(!(X))) { \ | |
785 | printk(KERN_ERR "\n"); \ | |
786 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
787 | BUG(); \ | |
788 | } \ | |
789 | } while(0) | |
790 | ||
791 | #define ASSERTCMP(X, OP, Y) \ | |
792 | do { \ | |
793 | if (unlikely(!((X) OP (Y)))) { \ | |
794 | printk(KERN_ERR "\n"); \ | |
795 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
796 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
797 | (unsigned long)(X), (unsigned long)(Y)); \ | |
798 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
799 | (unsigned long)(X), (unsigned long)(Y)); \ | |
800 | BUG(); \ | |
801 | } \ | |
802 | } while(0) | |
803 | ||
416351f2 DH |
804 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
805 | do { \ | |
806 | if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ | |
807 | printk(KERN_ERR "\n"); \ | |
808 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
809 | printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ | |
810 | (unsigned long)(L), (unsigned long)(N), \ | |
811 | (unsigned long)(H)); \ | |
812 | printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ | |
813 | (unsigned long)(L), (unsigned long)(N), \ | |
814 | (unsigned long)(H)); \ | |
815 | BUG(); \ | |
816 | } \ | |
817 | } while(0) | |
818 | ||
08e0e7c8 DH |
819 | #define ASSERTIF(C, X) \ |
820 | do { \ | |
821 | if (unlikely((C) && !(X))) { \ | |
822 | printk(KERN_ERR "\n"); \ | |
823 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
824 | BUG(); \ | |
825 | } \ | |
826 | } while(0) | |
827 | ||
828 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
829 | do { \ | |
830 | if (unlikely((C) && !((X) OP (Y)))) { \ | |
831 | printk(KERN_ERR "\n"); \ | |
832 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
833 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
834 | (unsigned long)(X), (unsigned long)(Y)); \ | |
835 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
836 | (unsigned long)(X), (unsigned long)(Y)); \ | |
837 | BUG(); \ | |
838 | } \ | |
839 | } while(0) | |
840 | ||
841 | #else | |
842 | ||
843 | #define ASSERT(X) \ | |
844 | do { \ | |
845 | } while(0) | |
846 | ||
847 | #define ASSERTCMP(X, OP, Y) \ | |
848 | do { \ | |
849 | } while(0) | |
850 | ||
416351f2 DH |
851 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
852 | do { \ | |
853 | } while(0) | |
854 | ||
08e0e7c8 DH |
855 | #define ASSERTIF(C, X) \ |
856 | do { \ | |
857 | } while(0) | |
858 | ||
859 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
860 | do { \ | |
861 | } while(0) | |
862 | ||
863 | #endif /* __KDEBUGALL */ |