Commit | Line | Data |
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ec26815a | 1 | /* internal AFS stuff |
1da177e4 | 2 | * |
08e0e7c8 | 3 | * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved. |
1da177e4 LT |
4 | * Written by David Howells (dhowells@redhat.com) |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
1da177e4 LT |
12 | #include <linux/compiler.h> |
13 | #include <linux/kernel.h> | |
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> |
f044c884 | 24 | #include <net/net_namespace.h> |
8324f0bc | 25 | #include <net/af_rxrpc.h> |
00c541ea | 26 | |
08e0e7c8 DH |
27 | #include "afs.h" |
28 | #include "afs_vl.h" | |
29 | ||
30 | #define AFS_CELL_MAX_ADDRS 15 | |
31 | ||
31143d5d | 32 | struct pagevec; |
08e0e7c8 DH |
33 | struct afs_call; |
34 | ||
00d3b7a4 DH |
35 | struct afs_mount_params { |
36 | bool rwpath; /* T if the parent should be considered R/W */ | |
37 | bool force; /* T to force cell type */ | |
bec5eb61 | 38 | bool autocell; /* T if set auto mount operation */ |
00d3b7a4 DH |
39 | afs_voltype_t type; /* type of volume requested */ |
40 | int volnamesz; /* size of volume name */ | |
41 | const char *volname; /* name of volume to mount */ | |
f044c884 | 42 | struct afs_net *net; /* Network namespace in effect */ |
00d3b7a4 DH |
43 | struct afs_cell *cell; /* cell in which to find volume */ |
44 | struct afs_volume *volume; /* volume record */ | |
45 | struct key *key; /* key to use for secure mounting */ | |
46 | }; | |
47 | ||
c435ee34 DH |
48 | struct afs_iget_data { |
49 | struct afs_fid fid; | |
50 | struct afs_volume *volume; /* volume on which resides */ | |
51 | }; | |
52 | ||
8e8d7f13 DH |
53 | enum afs_call_state { |
54 | AFS_CALL_REQUESTING, /* request is being sent for outgoing call */ | |
55 | AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */ | |
56 | AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */ | |
57 | AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */ | |
58 | AFS_CALL_REPLYING, /* replying to incoming call */ | |
59 | AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */ | |
60 | AFS_CALL_COMPLETE, /* Completed or failed */ | |
61 | }; | |
f044c884 | 62 | |
8b2a464c DH |
63 | /* |
64 | * List of server addresses. | |
65 | */ | |
66 | struct afs_addr_list { | |
67 | struct rcu_head rcu; /* Must be first */ | |
68 | refcount_t usage; | |
d2ddc776 | 69 | u32 version; /* Version */ |
8b2a464c DH |
70 | unsigned short nr_addrs; |
71 | unsigned short index; /* Address currently in use */ | |
d2ddc776 | 72 | unsigned short nr_ipv4; /* Number of IPv4 addresses */ |
bf99a53c DH |
73 | unsigned long probed; /* Mask of servers that have been probed */ |
74 | unsigned long yfs; /* Mask of servers that are YFS */ | |
8b2a464c DH |
75 | struct sockaddr_rxrpc addrs[]; |
76 | }; | |
77 | ||
08e0e7c8 DH |
78 | /* |
79 | * a record of an in-progress RxRPC call | |
80 | */ | |
81 | struct afs_call { | |
82 | const struct afs_call_type *type; /* type of call */ | |
08e0e7c8 | 83 | wait_queue_head_t waitq; /* processes awaiting completion */ |
341f741f | 84 | struct work_struct async_work; /* async I/O processor */ |
08e0e7c8 | 85 | struct work_struct work; /* actual work processor */ |
08e0e7c8 DH |
86 | struct rxrpc_call *rxcall; /* RxRPC call handle */ |
87 | struct key *key; /* security for this call */ | |
f044c884 | 88 | struct afs_net *net; /* The network namespace */ |
d0676a16 | 89 | struct afs_server *cm_server; /* Server affected by incoming CM call */ |
d2ddc776 | 90 | struct afs_cb_interest *cbi; /* Callback interest for server used */ |
08e0e7c8 | 91 | void *request; /* request data (first part) */ |
31143d5d DH |
92 | struct address_space *mapping; /* page set */ |
93 | struct afs_writeback *wb; /* writeback being performed */ | |
08e0e7c8 | 94 | void *buffer; /* reply receive buffer */ |
97e3043a | 95 | void *reply[4]; /* Where to put the reply */ |
31143d5d DH |
96 | pgoff_t first; /* first page in mapping to deal with */ |
97 | pgoff_t last; /* last page in mapping to deal with */ | |
d001648e | 98 | size_t offset; /* offset into received data store */ |
341f741f | 99 | atomic_t usage; |
8e8d7f13 | 100 | enum afs_call_state state; |
08e0e7c8 | 101 | int error; /* error code */ |
d001648e | 102 | u32 abort_code; /* Remote abort ID or 0 */ |
08e0e7c8 DH |
103 | unsigned request_size; /* size of request data */ |
104 | unsigned reply_max; /* maximum size of reply */ | |
31143d5d | 105 | unsigned first_offset; /* offset into mapping[first] */ |
c435ee34 | 106 | unsigned int cb_break; /* cb_break + cb_s_break before the call */ |
bcd89270 MD |
107 | union { |
108 | unsigned last_to; /* amount of mapping[last] */ | |
109 | unsigned count2; /* count used in unmarshalling */ | |
110 | }; | |
08e0e7c8 DH |
111 | unsigned char unmarshall; /* unmarshalling phase */ |
112 | bool incoming; /* T if incoming call */ | |
31143d5d | 113 | bool send_pages; /* T if data from mapping should be sent */ |
d001648e | 114 | bool need_attention; /* T if RxRPC poked us */ |
56ff9c83 | 115 | bool async; /* T if asynchronous */ |
33cd7f2b | 116 | bool ret_reply0; /* T if should return reply[0] on success */ |
a68f4a27 | 117 | bool upgrade; /* T to request service upgrade */ |
bf99a53c | 118 | u16 service_id; /* Actual service ID (after upgrade) */ |
50a2c953 | 119 | u32 operation_ID; /* operation ID for an incoming call */ |
08e0e7c8 DH |
120 | u32 count; /* count for use in unmarshalling */ |
121 | __be32 tmp; /* place to extract temporary data */ | |
31143d5d | 122 | afs_dataversion_t store_version; /* updated version expected from store */ |
08e0e7c8 DH |
123 | }; |
124 | ||
125 | struct afs_call_type { | |
00d3b7a4 | 126 | const char *name; |
025db80c | 127 | unsigned int op; /* Really enum afs_fs_operation */ |
00d3b7a4 | 128 | |
08e0e7c8 DH |
129 | /* deliver request or reply data to an call |
130 | * - returning an error will cause the call to be aborted | |
131 | */ | |
d001648e | 132 | int (*deliver)(struct afs_call *call); |
08e0e7c8 | 133 | |
08e0e7c8 DH |
134 | /* clean up a call */ |
135 | void (*destructor)(struct afs_call *call); | |
341f741f DH |
136 | |
137 | /* Work function */ | |
138 | void (*work)(struct work_struct *work); | |
08e0e7c8 DH |
139 | }; |
140 | ||
196ee9cd DH |
141 | /* |
142 | * Record of an outstanding read operation on a vnode. | |
143 | */ | |
144 | struct afs_read { | |
145 | loff_t pos; /* Where to start reading */ | |
e8e581a8 | 146 | loff_t len; /* How much we're asking for */ |
196ee9cd | 147 | loff_t actual_len; /* How much we're actually getting */ |
6a0e3999 | 148 | loff_t remain; /* Amount remaining */ |
196ee9cd | 149 | atomic_t usage; |
196ee9cd | 150 | unsigned int index; /* Which page we're reading into */ |
196ee9cd DH |
151 | unsigned int nr_pages; |
152 | void (*page_done)(struct afs_call *, struct afs_read *); | |
153 | struct page *pages[]; | |
154 | }; | |
155 | ||
31143d5d DH |
156 | /* |
157 | * record of an outstanding writeback on a vnode | |
158 | */ | |
159 | struct afs_writeback { | |
160 | struct list_head link; /* link in vnode->writebacks */ | |
161 | struct work_struct writer; /* work item to perform the writeback */ | |
162 | struct afs_vnode *vnode; /* vnode to which this write applies */ | |
163 | struct key *key; /* owner of this write */ | |
164 | wait_queue_head_t waitq; /* completion and ready wait queue */ | |
165 | pgoff_t first; /* first page in batch */ | |
166 | pgoff_t point; /* last page in current store op */ | |
167 | pgoff_t last; /* last page in batch (inclusive) */ | |
168 | unsigned offset_first; /* offset into first page of start of write */ | |
169 | unsigned to_last; /* offset into last page of end of write */ | |
170 | int num_conflicts; /* count of conflicting writes in list */ | |
171 | int usage; | |
172 | bool conflicts; /* T if has dependent conflicts */ | |
173 | enum { | |
174 | AFS_WBACK_SYNCING, /* synchronisation being performed */ | |
175 | AFS_WBACK_PENDING, /* write pending */ | |
176 | AFS_WBACK_CONFLICTING, /* conflicting writes posted */ | |
177 | AFS_WBACK_WRITING, /* writing back */ | |
178 | AFS_WBACK_COMPLETE /* the writeback record has been unlinked */ | |
179 | } state __attribute__((packed)); | |
180 | }; | |
181 | ||
08e0e7c8 DH |
182 | /* |
183 | * AFS superblock private data | |
184 | * - there's one superblock per volume | |
185 | */ | |
186 | struct afs_super_info { | |
f044c884 | 187 | struct afs_net *net; /* Network namespace */ |
49566f6f | 188 | struct afs_cell *cell; /* The cell in which the volume resides */ |
08e0e7c8 | 189 | struct afs_volume *volume; /* volume record */ |
08e0e7c8 | 190 | }; |
1da177e4 | 191 | |
08e0e7c8 DH |
192 | static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
193 | { | |
194 | return sb->s_fs_info; | |
1da177e4 LT |
195 | } |
196 | ||
08e0e7c8 DH |
197 | extern struct file_system_type afs_fs_type; |
198 | ||
f044c884 DH |
199 | /* |
200 | * AFS network namespace record. | |
201 | */ | |
202 | struct afs_net { | |
203 | struct afs_uuid uuid; | |
204 | bool live; /* F if this namespace is being removed */ | |
205 | ||
206 | /* AF_RXRPC I/O stuff */ | |
207 | struct socket *socket; | |
208 | struct afs_call *spare_incoming_call; | |
209 | struct work_struct charge_preallocation_work; | |
210 | struct mutex socket_mutex; | |
211 | atomic_t nr_outstanding_calls; | |
212 | atomic_t nr_superblocks; | |
213 | ||
214 | /* Cell database */ | |
989782dc | 215 | struct rb_root cells; |
f044c884 | 216 | struct afs_cell *ws_cell; |
989782dc DH |
217 | struct work_struct cells_manager; |
218 | struct timer_list cells_timer; | |
219 | atomic_t cells_outstanding; | |
220 | seqlock_t cells_lock; | |
f044c884 | 221 | |
989782dc | 222 | spinlock_t proc_cells_lock; |
f044c884 DH |
223 | struct list_head proc_cells; |
224 | ||
d2ddc776 DH |
225 | /* Known servers. Theoretically each fileserver can only be in one |
226 | * cell, but in practice, people create aliases and subsets and there's | |
227 | * no easy way to distinguish them. | |
228 | */ | |
229 | seqlock_t fs_lock; /* For fs_servers */ | |
230 | struct rb_root fs_servers; /* afs_server (by server UUID or address) */ | |
231 | struct list_head fs_updates; /* afs_server (by update_at) */ | |
232 | struct hlist_head fs_proc; /* procfs servers list */ | |
f044c884 | 233 | |
d2ddc776 DH |
234 | struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ |
235 | struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */ | |
236 | seqlock_t fs_addr_lock; /* For fs_addresses[46] */ | |
f044c884 | 237 | |
d2ddc776 DH |
238 | struct work_struct fs_manager; |
239 | struct timer_list fs_timer; | |
59fa1c4a | 240 | atomic_t servers_outstanding; |
f044c884 | 241 | |
d2ddc776 DH |
242 | /* File locking renewal management */ |
243 | struct mutex lock_manager_mutex; | |
244 | ||
f044c884 DH |
245 | /* Misc */ |
246 | struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ | |
247 | }; | |
248 | ||
249 | extern struct afs_net __afs_net;// Dummy AFS network namespace; TODO: replace with real netns | |
250 | ||
989782dc DH |
251 | enum afs_cell_state { |
252 | AFS_CELL_UNSET, | |
253 | AFS_CELL_ACTIVATING, | |
254 | AFS_CELL_ACTIVE, | |
255 | AFS_CELL_DEACTIVATING, | |
256 | AFS_CELL_INACTIVE, | |
257 | AFS_CELL_FAILED, | |
258 | }; | |
259 | ||
08e0e7c8 | 260 | /* |
d2ddc776 DH |
261 | * AFS cell record. |
262 | * | |
263 | * This is a tricky concept to get right as it is possible to create aliases | |
264 | * simply by pointing AFSDB/SRV records for two names at the same set of VL | |
265 | * servers; it is also possible to do things like setting up two sets of VL | |
266 | * servers, one of which provides a superset of the volumes provided by the | |
267 | * other (for internal/external division, for example). | |
268 | * | |
269 | * Cells only exist in the sense that (a) a cell's name maps to a set of VL | |
270 | * servers and (b) a cell's name is used by the client to select the key to use | |
271 | * for authentication and encryption. The cell name is not typically used in | |
272 | * the protocol. | |
273 | * | |
274 | * There is no easy way to determine if two cells are aliases or one is a | |
275 | * subset of another. | |
08e0e7c8 DH |
276 | */ |
277 | struct afs_cell { | |
989782dc DH |
278 | union { |
279 | struct rcu_head rcu; | |
280 | struct rb_node net_node; /* Node in net->cells */ | |
281 | }; | |
282 | struct afs_net *net; | |
00d3b7a4 | 283 | struct key *anonymous_key; /* anonymous user key for this cell */ |
989782dc | 284 | struct work_struct manager; /* Manager for init/deinit/dns */ |
08e0e7c8 | 285 | struct list_head proc_link; /* /proc cell list link */ |
9b3f26c9 DH |
286 | #ifdef CONFIG_AFS_FSCACHE |
287 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 288 | #endif |
989782dc DH |
289 | time64_t dns_expiry; /* Time AFSDB/SRV record expires */ |
290 | time64_t last_inactive; /* Time of last drop of usage count */ | |
291 | atomic_t usage; | |
292 | unsigned long flags; | |
293 | #define AFS_CELL_FL_NOT_READY 0 /* The cell record is not ready for use */ | |
294 | #define AFS_CELL_FL_NO_GC 1 /* The cell was added manually, don't auto-gc */ | |
295 | #define AFS_CELL_FL_NOT_FOUND 2 /* Permanent DNS error */ | |
296 | #define AFS_CELL_FL_DNS_FAIL 3 /* Failed to access DNS */ | |
8b2a464c | 297 | #define AFS_CELL_FL_NO_LOOKUP_YET 4 /* Not completed first DNS lookup yet */ |
989782dc DH |
298 | enum afs_cell_state state; |
299 | short error; | |
300 | ||
d2ddc776 DH |
301 | /* Active fileserver interaction state. */ |
302 | struct list_head proc_volumes; /* procfs volume list */ | |
303 | rwlock_t proc_lock; | |
989782dc | 304 | |
d2ddc776 | 305 | /* VL server list. */ |
8b2a464c DH |
306 | rwlock_t vl_addrs_lock; /* Lock on vl_addrs */ |
307 | struct afs_addr_list __rcu *vl_addrs; /* List of VL servers */ | |
989782dc DH |
308 | u8 name_len; /* Length of name */ |
309 | char name[64 + 1]; /* Cell name, case-flattened and NUL-padded */ | |
08e0e7c8 DH |
310 | }; |
311 | ||
312 | /* | |
d2ddc776 DH |
313 | * Cached VLDB entry. |
314 | * | |
315 | * This is pointed to by cell->vldb_entries, indexed by name. | |
08e0e7c8 | 316 | */ |
d2ddc776 DH |
317 | struct afs_vldb_entry { |
318 | afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ | |
00d3b7a4 | 319 | |
d2ddc776 DH |
320 | unsigned long flags; |
321 | #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ | |
322 | #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ | |
323 | #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ | |
324 | #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ | |
325 | #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ | |
326 | ||
327 | uuid_t fs_server[AFS_NMAXNSERVERS]; | |
328 | u8 fs_mask[AFS_NMAXNSERVERS]; | |
08e0e7c8 DH |
329 | #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ |
330 | #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ | |
331 | #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ | |
d2ddc776 DH |
332 | short error; |
333 | u8 nr_servers; /* Number of server records */ | |
334 | u8 name_len; | |
335 | u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ | |
08e0e7c8 DH |
336 | }; |
337 | ||
338 | /* | |
d2ddc776 | 339 | * Record of fileserver with which we're actively communicating. |
08e0e7c8 DH |
340 | */ |
341 | struct afs_server { | |
d2ddc776 DH |
342 | struct rcu_head rcu; |
343 | union { | |
344 | uuid_t uuid; /* Server ID */ | |
345 | struct afs_uuid _uuid; | |
346 | }; | |
347 | ||
348 | struct afs_addr_list __rcu *addresses; | |
349 | struct rb_node uuid_rb; /* Link in net->servers */ | |
350 | struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ | |
351 | struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ | |
352 | struct hlist_node proc_link; /* Link in net->fs_proc */ | |
353 | struct afs_server *gc_next; /* Next server in manager's list */ | |
354 | time64_t put_time; /* Time at which last put */ | |
355 | time64_t update_at; /* Time at which to next update the record */ | |
c435ee34 | 356 | unsigned long flags; |
d2ddc776 DH |
357 | #define AFS_SERVER_FL_NEW 0 /* New server, don't inc cb_s_break */ |
358 | #define AFS_SERVER_FL_NOT_READY 1 /* The record is not ready for use */ | |
359 | #define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */ | |
360 | #define AFS_SERVER_FL_VL_FAIL 3 /* Failed to access VL server */ | |
361 | #define AFS_SERVER_FL_UPDATING 4 | |
362 | #define AFS_SERVER_FL_PROBED 5 /* The fileserver has been probed */ | |
363 | #define AFS_SERVER_FL_PROBING 6 /* Fileserver is being probed */ | |
364 | atomic_t usage; | |
365 | u32 addr_version; /* Address list version */ | |
08e0e7c8 DH |
366 | |
367 | /* file service access */ | |
d2ddc776 | 368 | rwlock_t fs_lock; /* access lock */ |
08e0e7c8 DH |
369 | |
370 | /* callback promise management */ | |
c435ee34 DH |
371 | struct list_head cb_interests; /* List of superblocks using this server */ |
372 | unsigned cb_s_break; /* Break-everything counter. */ | |
373 | rwlock_t cb_break_lock; /* Volume finding lock */ | |
374 | }; | |
375 | ||
376 | /* | |
377 | * Interest by a superblock on a server. | |
378 | */ | |
379 | struct afs_cb_interest { | |
380 | struct list_head cb_link; /* Link in server->cb_interests */ | |
381 | struct afs_server *server; /* Server on which this interest resides */ | |
382 | struct super_block *sb; /* Superblock on which inodes reside */ | |
383 | afs_volid_t vid; /* Volume ID to match */ | |
384 | refcount_t usage; | |
08e0e7c8 DH |
385 | }; |
386 | ||
387 | /* | |
d2ddc776 DH |
388 | * Replaceable server list. |
389 | */ | |
390 | struct afs_server_entry { | |
391 | struct afs_server *server; | |
392 | struct afs_cb_interest *cb_interest; | |
393 | }; | |
394 | ||
395 | struct afs_server_list { | |
396 | refcount_t usage; | |
397 | unsigned short nr_servers; | |
398 | unsigned short index; /* Server currently in use */ | |
399 | unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ | |
400 | unsigned int seq; /* Set to ->servers_seq when installed */ | |
401 | struct afs_server_entry servers[]; | |
402 | }; | |
403 | ||
404 | /* | |
405 | * Live AFS volume management. | |
08e0e7c8 DH |
406 | */ |
407 | struct afs_volume { | |
d2ddc776 | 408 | afs_volid_t vid; /* volume ID */ |
08e0e7c8 | 409 | atomic_t usage; |
d2ddc776 DH |
410 | time64_t update_at; /* Time at which to next update */ |
411 | struct afs_cell *cell; /* Cell to which belongs (pins ref) */ | |
412 | struct list_head proc_link; /* Link in cell->vl_proc */ | |
413 | unsigned long flags; | |
414 | #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ | |
415 | #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ | |
416 | #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ | |
417 | #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ | |
418 | #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ | |
419 | #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ | |
9b3f26c9 DH |
420 | #ifdef CONFIG_AFS_FSCACHE |
421 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 422 | #endif |
d2ddc776 DH |
423 | struct afs_server_list *servers; /* List of servers on which volume resides */ |
424 | rwlock_t servers_lock; /* Lock for ->servers */ | |
425 | unsigned int servers_seq; /* Incremented each time ->servers changes */ | |
426 | ||
08e0e7c8 | 427 | afs_voltype_t type; /* type of volume */ |
d2ddc776 | 428 | short error; |
08e0e7c8 | 429 | char type_force; /* force volume type (suppress R/O -> R/W) */ |
d2ddc776 DH |
430 | u8 name_len; |
431 | u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ | |
08e0e7c8 DH |
432 | }; |
433 | ||
434 | /* | |
435 | * AFS inode private data | |
436 | */ | |
437 | struct afs_vnode { | |
438 | struct inode vfs_inode; /* the VFS's inode record */ | |
439 | ||
440 | struct afs_volume *volume; /* volume on which vnode resides */ | |
08e0e7c8 DH |
441 | struct afs_fid fid; /* the file identifier for this inode */ |
442 | struct afs_file_status status; /* AFS status info for this file */ | |
9b3f26c9 DH |
443 | #ifdef CONFIG_AFS_FSCACHE |
444 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 445 | #endif |
be080a6f | 446 | struct afs_permits *permit_cache; /* cache of permits so far obtained */ |
d2ddc776 | 447 | struct mutex io_lock; /* Lock for serialising I/O on this mutex */ |
260a9803 | 448 | struct mutex validate_lock; /* lock for validating this vnode */ |
31143d5d | 449 | spinlock_t writeback_lock; /* lock for writebacks */ |
08e0e7c8 DH |
450 | spinlock_t lock; /* waitqueue/flags lock */ |
451 | unsigned long flags; | |
c435ee34 | 452 | #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ |
260a9803 | 453 | #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
c435ee34 | 454 | #define AFS_VNODE_DIR_MODIFIED 2 /* set if dir vnode's data modified */ |
08e0e7c8 DH |
455 | #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ |
456 | #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ | |
457 | #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ | |
e8d6c554 DH |
458 | #define AFS_VNODE_LOCKING 6 /* set if waiting for lock on vnode */ |
459 | #define AFS_VNODE_READLOCKED 7 /* set if vnode is read-locked on the server */ | |
460 | #define AFS_VNODE_WRITELOCKED 8 /* set if vnode is write-locked on the server */ | |
461 | #define AFS_VNODE_UNLOCKING 9 /* set if vnode is being unlocked on the server */ | |
bec5eb61 | 462 | #define AFS_VNODE_AUTOCELL 10 /* set if Vnode is an auto mount point */ |
463 | #define AFS_VNODE_PSEUDODIR 11 /* set if Vnode is a pseudo directory */ | |
08e0e7c8 | 464 | |
31143d5d | 465 | struct list_head writebacks; /* alterations in pagecache that need writing */ |
e8d6c554 DH |
466 | struct list_head pending_locks; /* locks waiting to be granted */ |
467 | struct list_head granted_locks; /* locks granted on this file */ | |
468 | struct delayed_work lock_work; /* work to be done in locking */ | |
469 | struct key *unlock_key; /* key to be used in unlocking */ | |
31143d5d | 470 | |
08e0e7c8 | 471 | /* outstanding callback notification on this file */ |
c435ee34 DH |
472 | struct afs_cb_interest *cb_interest; /* Server on which this resides */ |
473 | unsigned int cb_s_break; /* Mass break counter on ->server */ | |
474 | unsigned int cb_break; /* Break counter on vnode */ | |
475 | seqlock_t cb_lock; /* Lock for ->cb_interest, ->status, ->cb_*break */ | |
476 | ||
477 | time64_t cb_expires_at; /* time at which callback expires */ | |
08e0e7c8 | 478 | unsigned cb_version; /* callback version */ |
08e0e7c8 | 479 | afs_callback_type_t cb_type; /* type of callback */ |
08e0e7c8 DH |
480 | }; |
481 | ||
00d3b7a4 DH |
482 | /* |
483 | * cached security record for one user's attempt to access a vnode | |
484 | */ | |
485 | struct afs_permit { | |
486 | struct key *key; /* RxRPC ticket holding a security context */ | |
be080a6f | 487 | afs_access_t access; /* CallerAccess value for this key */ |
00d3b7a4 DH |
488 | }; |
489 | ||
490 | /* | |
be080a6f DH |
491 | * Immutable cache of CallerAccess records from attempts to access vnodes. |
492 | * These may be shared between multiple vnodes. | |
00d3b7a4 DH |
493 | */ |
494 | struct afs_permits { | |
be080a6f DH |
495 | struct rcu_head rcu; |
496 | struct hlist_node hash_node; /* Link in hash */ | |
497 | unsigned long h; /* Hash value for this permit list */ | |
498 | refcount_t usage; | |
499 | unsigned short nr_permits; /* Number of records */ | |
500 | bool invalidated; /* Invalidated due to key change */ | |
501 | struct afs_permit permits[]; /* List of permits sorted by key pointer */ | |
00d3b7a4 DH |
502 | }; |
503 | ||
b908fe6b DH |
504 | /* |
505 | * record of one of a system's set of network interfaces | |
506 | */ | |
507 | struct afs_interface { | |
b908fe6b DH |
508 | struct in_addr address; /* IPv4 address bound to interface */ |
509 | struct in_addr netmask; /* netmask applied to address */ | |
510 | unsigned mtu; /* MTU of interface */ | |
511 | }; | |
512 | ||
8b2a464c DH |
513 | /* |
514 | * Cursor for iterating over a server's address list. | |
515 | */ | |
516 | struct afs_addr_cursor { | |
517 | struct afs_addr_list *alist; /* Current address list (pins ref) */ | |
518 | struct sockaddr_rxrpc *addr; | |
d2ddc776 | 519 | u32 abort_code; |
8b2a464c DH |
520 | unsigned short start; /* Starting point in alist->addrs[] */ |
521 | unsigned short index; /* Wrapping offset from start to current addr */ | |
522 | short error; | |
523 | bool begun; /* T if we've begun iteration */ | |
524 | bool responded; /* T if the current address responded */ | |
525 | }; | |
526 | ||
527 | /* | |
528 | * Cursor for iterating over a set of fileservers. | |
529 | */ | |
530 | struct afs_fs_cursor { | |
531 | struct afs_addr_cursor ac; | |
d2ddc776 DH |
532 | struct afs_vnode *vnode; |
533 | struct afs_server_list *server_list; /* Current server list (pins ref) */ | |
534 | struct afs_cb_interest *cbi; /* Server on which this resides (pins ref) */ | |
535 | struct key *key; /* Key for the server */ | |
536 | unsigned int cb_break; /* cb_break + cb_s_break before the call */ | |
537 | unsigned int cb_break_2; /* cb_break + cb_s_break (2nd vnode) */ | |
538 | unsigned char start; /* Initial index in server list */ | |
539 | unsigned char index; /* Number of servers tried beyond start */ | |
540 | unsigned short flags; | |
541 | #define AFS_FS_CURSOR_STOP 0x0001 /* Set to cease iteration */ | |
542 | #define AFS_FS_CURSOR_VBUSY 0x0002 /* Set if seen VBUSY */ | |
543 | #define AFS_FS_CURSOR_VMOVED 0x0004 /* Set if seen VMOVED */ | |
544 | #define AFS_FS_CURSOR_VNOVOL 0x0008 /* Set if seen VNOVOL */ | |
545 | #define AFS_FS_CURSOR_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ | |
546 | #define AFS_FS_CURSOR_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ | |
8b2a464c DH |
547 | }; |
548 | ||
08e0e7c8 | 549 | /*****************************************************************************/ |
8b2a464c DH |
550 | /* |
551 | * addr_list.c | |
552 | */ | |
553 | static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) | |
554 | { | |
555 | if (alist) | |
556 | refcount_inc(&alist->usage); | |
557 | return alist; | |
558 | } | |
559 | extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, | |
560 | unsigned short, | |
561 | unsigned short); | |
562 | extern void afs_put_addrlist(struct afs_addr_list *); | |
563 | extern struct afs_addr_list *afs_parse_text_addrs(const char *, size_t, char, | |
564 | unsigned short, unsigned short); | |
565 | extern struct afs_addr_list *afs_dns_query(struct afs_cell *, time64_t *); | |
566 | extern bool afs_iterate_addresses(struct afs_addr_cursor *); | |
567 | extern int afs_end_cursor(struct afs_addr_cursor *); | |
568 | extern int afs_set_vl_cursor(struct afs_addr_cursor *, struct afs_cell *); | |
569 | ||
bf99a53c DH |
570 | extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); |
571 | extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); | |
d2ddc776 | 572 | |
9b3f26c9 DH |
573 | /* |
574 | * cache.c | |
575 | */ | |
576 | #ifdef CONFIG_AFS_FSCACHE | |
577 | extern struct fscache_netfs afs_cache_netfs; | |
578 | extern struct fscache_cookie_def afs_cell_cache_index_def; | |
9b3f26c9 DH |
579 | extern struct fscache_cookie_def afs_volume_cache_index_def; |
580 | extern struct fscache_cookie_def afs_vnode_cache_index_def; | |
581 | #else | |
582 | #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
9b3f26c9 DH |
583 | #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) |
584 | #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
585 | #endif | |
586 | ||
08e0e7c8 DH |
587 | /* |
588 | * callback.c | |
589 | */ | |
590 | extern void afs_init_callback_state(struct afs_server *); | |
c435ee34 DH |
591 | extern void afs_break_callback(struct afs_vnode *); |
592 | extern void afs_break_callbacks(struct afs_server *, size_t,struct afs_callback[]); | |
593 | ||
d2ddc776 | 594 | extern int afs_register_server_cb_interest(struct afs_vnode *, struct afs_server_entry *); |
c435ee34 | 595 | extern void afs_put_cb_interest(struct afs_net *, struct afs_cb_interest *); |
d2ddc776 | 596 | extern void afs_clear_callback_interests(struct afs_net *, struct afs_server_list *); |
c435ee34 DH |
597 | |
598 | static inline struct afs_cb_interest *afs_get_cb_interest(struct afs_cb_interest *cbi) | |
599 | { | |
600 | refcount_inc(&cbi->usage); | |
601 | return cbi; | |
602 | } | |
08e0e7c8 | 603 | |
1da177e4 LT |
604 | /* |
605 | * cell.c | |
606 | */ | |
989782dc DH |
607 | extern int afs_cell_init(struct afs_net *, const char *); |
608 | extern struct afs_cell *afs_lookup_cell_rcu(struct afs_net *, const char *, unsigned); | |
609 | extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, | |
610 | const char *, bool); | |
8b2a464c | 611 | extern struct afs_cell *afs_get_cell(struct afs_cell *); |
9ed900b1 | 612 | extern void afs_put_cell(struct afs_net *, struct afs_cell *); |
989782dc DH |
613 | extern void afs_manage_cells(struct work_struct *); |
614 | extern void afs_cells_timer(struct timer_list *); | |
f044c884 | 615 | extern void __net_exit afs_cell_purge(struct afs_net *); |
08e0e7c8 DH |
616 | |
617 | /* | |
618 | * cmservice.c | |
619 | */ | |
620 | extern bool afs_cm_incoming_call(struct afs_call *); | |
621 | ||
1da177e4 LT |
622 | /* |
623 | * dir.c | |
624 | */ | |
dab17c1a | 625 | extern bool afs_dir_check_page(struct inode *, struct page *); |
754661f1 | 626 | extern const struct inode_operations afs_dir_inode_operations; |
d61dcce2 | 627 | extern const struct dentry_operations afs_fs_dentry_operations; |
4b6f5d20 | 628 | extern const struct file_operations afs_dir_file_operations; |
1da177e4 LT |
629 | |
630 | /* | |
631 | * file.c | |
632 | */ | |
f5e54d6e | 633 | extern const struct address_space_operations afs_fs_aops; |
754661f1 | 634 | extern const struct inode_operations afs_file_inode_operations; |
00d3b7a4 DH |
635 | extern const struct file_operations afs_file_operations; |
636 | ||
637 | extern int afs_open(struct inode *, struct file *); | |
638 | extern int afs_release(struct inode *, struct file *); | |
d2ddc776 | 639 | extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *); |
f6d335c0 | 640 | extern int afs_page_filler(void *, struct page *); |
196ee9cd | 641 | extern void afs_put_read(struct afs_read *); |
1da177e4 | 642 | |
e8d6c554 DH |
643 | /* |
644 | * flock.c | |
645 | */ | |
f044c884 DH |
646 | extern struct workqueue_struct *afs_lock_manager; |
647 | ||
e8d6c554 DH |
648 | extern void afs_lock_work(struct work_struct *); |
649 | extern void afs_lock_may_be_available(struct afs_vnode *); | |
650 | extern int afs_lock(struct file *, int, struct file_lock *); | |
651 | extern int afs_flock(struct file *, int, struct file_lock *); | |
652 | ||
08e0e7c8 DH |
653 | /* |
654 | * fsclient.c | |
655 | */ | |
d2ddc776 DH |
656 | extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *); |
657 | extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *); | |
658 | extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *); | |
659 | extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t, | |
660 | struct afs_fid *, struct afs_file_status *, struct afs_callback *); | |
661 | extern int afs_fs_remove(struct afs_fs_cursor *, const char *, bool); | |
662 | extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *); | |
663 | extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, | |
664 | struct afs_fid *, struct afs_file_status *); | |
665 | extern int afs_fs_rename(struct afs_fs_cursor *, const char *, | |
666 | struct afs_vnode *, const char *); | |
8b2a464c | 667 | extern int afs_fs_store_data(struct afs_fs_cursor *, struct afs_writeback *, |
d2ddc776 DH |
668 | pgoff_t, pgoff_t, unsigned, unsigned); |
669 | extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *); | |
670 | extern int afs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *); | |
671 | extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t); | |
672 | extern int afs_fs_extend_lock(struct afs_fs_cursor *); | |
673 | extern int afs_fs_release_lock(struct afs_fs_cursor *); | |
674 | extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, | |
675 | struct afs_addr_cursor *, struct key *); | |
676 | extern int afs_fs_get_capabilities(struct afs_net *, struct afs_server *, | |
677 | struct afs_addr_cursor *, struct key *); | |
08e0e7c8 | 678 | |
1da177e4 LT |
679 | /* |
680 | * inode.c | |
681 | */ | |
d2ddc776 | 682 | extern int afs_fetch_status(struct afs_vnode *, struct key *); |
c435ee34 | 683 | extern int afs_iget5_test(struct inode *, void *); |
bec5eb61 | 684 | extern struct inode *afs_iget_autocell(struct inode *, const char *, int, |
685 | struct key *); | |
00d3b7a4 | 686 | extern struct inode *afs_iget(struct super_block *, struct key *, |
260a9803 | 687 | struct afs_fid *, struct afs_file_status *, |
d2ddc776 DH |
688 | struct afs_callback *, |
689 | struct afs_cb_interest *); | |
416351f2 | 690 | extern void afs_zap_data(struct afs_vnode *); |
260a9803 | 691 | extern int afs_validate(struct afs_vnode *, struct key *); |
a528d35e | 692 | extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); |
31143d5d | 693 | extern int afs_setattr(struct dentry *, struct iattr *); |
b57922d9 | 694 | extern void afs_evict_inode(struct inode *); |
bec5eb61 | 695 | extern int afs_drop_inode(struct inode *); |
1da177e4 LT |
696 | |
697 | /* | |
698 | * main.c | |
699 | */ | |
0ad53eee | 700 | extern struct workqueue_struct *afs_wq; |
f044c884 DH |
701 | |
702 | static inline struct afs_net *afs_d2net(struct dentry *dentry) | |
703 | { | |
704 | return &__afs_net; | |
705 | } | |
706 | ||
707 | static inline struct afs_net *afs_i2net(struct inode *inode) | |
708 | { | |
709 | return &__afs_net; | |
710 | } | |
711 | ||
712 | static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) | |
713 | { | |
714 | return &__afs_net; | |
715 | } | |
716 | ||
717 | static inline struct afs_net *afs_sock2net(struct sock *sk) | |
718 | { | |
719 | return &__afs_net; | |
720 | } | |
721 | ||
722 | static inline struct afs_net *afs_get_net(struct afs_net *net) | |
723 | { | |
724 | return net; | |
725 | } | |
726 | ||
727 | static inline void afs_put_net(struct afs_net *net) | |
728 | { | |
729 | } | |
1da177e4 | 730 | |
08e0e7c8 DH |
731 | /* |
732 | * misc.c | |
733 | */ | |
734 | extern int afs_abort_to_error(u32); | |
735 | ||
1da177e4 LT |
736 | /* |
737 | * mntpt.c | |
738 | */ | |
754661f1 | 739 | extern const struct inode_operations afs_mntpt_inode_operations; |
bec5eb61 | 740 | extern const struct inode_operations afs_autocell_inode_operations; |
4b6f5d20 | 741 | extern const struct file_operations afs_mntpt_file_operations; |
1da177e4 | 742 | |
d18610b0 | 743 | extern struct vfsmount *afs_d_automount(struct path *); |
08e0e7c8 | 744 | extern void afs_mntpt_kill_timer(void); |
1da177e4 | 745 | |
b4db2b35 AB |
746 | /* |
747 | * netdevices.c | |
748 | */ | |
749 | extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); | |
750 | ||
1da177e4 LT |
751 | /* |
752 | * proc.c | |
753 | */ | |
f044c884 DH |
754 | extern int __net_init afs_proc_init(struct afs_net *); |
755 | extern void __net_exit afs_proc_cleanup(struct afs_net *); | |
756 | extern int afs_proc_cell_setup(struct afs_net *, struct afs_cell *); | |
757 | extern void afs_proc_cell_remove(struct afs_net *, struct afs_cell *); | |
1da177e4 | 758 | |
d2ddc776 DH |
759 | /* |
760 | * rotate.c | |
761 | */ | |
762 | extern bool afs_begin_vnode_operation(struct afs_fs_cursor *, struct afs_vnode *, | |
763 | struct key *); | |
764 | extern bool afs_select_fileserver(struct afs_fs_cursor *); | |
765 | extern bool afs_select_current_fileserver(struct afs_fs_cursor *); | |
766 | extern int afs_end_vnode_operation(struct afs_fs_cursor *); | |
767 | ||
08e0e7c8 DH |
768 | /* |
769 | * rxrpc.c | |
770 | */ | |
f044c884 | 771 | extern struct workqueue_struct *afs_async_calls; |
8324f0bc | 772 | |
f044c884 DH |
773 | extern int __net_init afs_open_socket(struct afs_net *); |
774 | extern void __net_exit afs_close_socket(struct afs_net *); | |
775 | extern void afs_charge_preallocation(struct work_struct *); | |
341f741f DH |
776 | extern void afs_put_call(struct afs_call *); |
777 | extern int afs_queue_call_work(struct afs_call *); | |
8b2a464c | 778 | extern long afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t, bool); |
f044c884 DH |
779 | extern struct afs_call *afs_alloc_flat_call(struct afs_net *, |
780 | const struct afs_call_type *, | |
08e0e7c8 DH |
781 | size_t, size_t); |
782 | extern void afs_flat_call_destructor(struct afs_call *); | |
08e0e7c8 | 783 | extern void afs_send_empty_reply(struct afs_call *); |
b908fe6b | 784 | extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); |
d001648e | 785 | extern int afs_extract_data(struct afs_call *, void *, size_t, bool); |
08e0e7c8 | 786 | |
d001648e | 787 | static inline int afs_transfer_reply(struct afs_call *call) |
372ee163 | 788 | { |
d001648e | 789 | return afs_extract_data(call, call->buffer, call->reply_max, false); |
372ee163 DH |
790 | } |
791 | ||
00d3b7a4 DH |
792 | /* |
793 | * security.c | |
794 | */ | |
be080a6f | 795 | extern void afs_put_permits(struct afs_permits *); |
00d3b7a4 | 796 | extern void afs_clear_permits(struct afs_vnode *); |
be080a6f | 797 | extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int); |
416351f2 | 798 | extern void afs_zap_permits(struct rcu_head *); |
00d3b7a4 | 799 | extern struct key *afs_request_key(struct afs_cell *); |
10556cb2 | 800 | extern int afs_permission(struct inode *, int); |
be080a6f | 801 | extern void __exit afs_clean_up_permit_cache(void); |
00d3b7a4 | 802 | |
08e0e7c8 DH |
803 | /* |
804 | * server.c | |
805 | */ | |
806 | extern spinlock_t afs_server_peer_lock; | |
807 | ||
c435ee34 DH |
808 | static inline struct afs_server *afs_get_server(struct afs_server *server) |
809 | { | |
810 | atomic_inc(&server->usage); | |
811 | return server; | |
812 | } | |
08e0e7c8 | 813 | |
f044c884 DH |
814 | extern struct afs_server *afs_find_server(struct afs_net *, |
815 | const struct sockaddr_rxrpc *); | |
d2ddc776 DH |
816 | extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); |
817 | extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *); | |
9ed900b1 | 818 | extern void afs_put_server(struct afs_net *, struct afs_server *); |
d2ddc776 DH |
819 | extern void afs_manage_servers(struct work_struct *); |
820 | extern void afs_servers_timer(struct timer_list *); | |
f044c884 | 821 | extern void __net_exit afs_purge_servers(struct afs_net *); |
d2ddc776 DH |
822 | extern bool afs_probe_fileserver(struct afs_fs_cursor *); |
823 | extern bool afs_check_server_record(struct afs_fs_cursor *, struct afs_server *); | |
08e0e7c8 | 824 | |
00d3b7a4 | 825 | /* |
d2ddc776 | 826 | * server_list.c |
00d3b7a4 | 827 | */ |
d2ddc776 DH |
828 | static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) |
829 | { | |
830 | refcount_inc(&slist->usage); | |
831 | return slist; | |
832 | } | |
00d3b7a4 | 833 | |
d2ddc776 DH |
834 | extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); |
835 | extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, | |
836 | struct afs_vldb_entry *, | |
837 | u8); | |
838 | extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); | |
08e0e7c8 DH |
839 | |
840 | /* | |
d2ddc776 | 841 | * super.c |
08e0e7c8 | 842 | */ |
d2ddc776 DH |
843 | extern int __init afs_fs_init(void); |
844 | extern void __exit afs_fs_exit(void); | |
08e0e7c8 DH |
845 | |
846 | /* | |
d2ddc776 | 847 | * vlclient.c |
08e0e7c8 | 848 | */ |
d2ddc776 DH |
849 | extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_net *, |
850 | struct afs_addr_cursor *, | |
851 | struct key *, const char *, int); | |
852 | extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_net *, struct afs_addr_cursor *, | |
853 | struct key *, const uuid_t *); | |
bf99a53c DH |
854 | extern int afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, struct key *); |
855 | extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_net *, struct afs_addr_cursor *, | |
856 | struct key *, const uuid_t *); | |
08e0e7c8 DH |
857 | |
858 | /* | |
859 | * volume.c | |
860 | */ | |
d2ddc776 | 861 | static inline struct afs_volume *__afs_get_volume(struct afs_volume *volume) |
49566f6f DH |
862 | { |
863 | if (volume) | |
864 | atomic_inc(&volume->usage); | |
865 | return volume; | |
866 | } | |
08e0e7c8 | 867 | |
d2ddc776 DH |
868 | extern struct afs_volume *afs_create_volume(struct afs_mount_params *); |
869 | extern void afs_activate_volume(struct afs_volume *); | |
870 | extern void afs_deactivate_volume(struct afs_volume *); | |
9ed900b1 | 871 | extern void afs_put_volume(struct afs_cell *, struct afs_volume *); |
d2ddc776 | 872 | extern int afs_check_volume_status(struct afs_volume *, struct key *); |
08e0e7c8 | 873 | |
31143d5d DH |
874 | /* |
875 | * write.c | |
876 | */ | |
877 | extern int afs_set_page_dirty(struct page *); | |
878 | extern void afs_put_writeback(struct afs_writeback *); | |
15b4650e NP |
879 | extern int afs_write_begin(struct file *file, struct address_space *mapping, |
880 | loff_t pos, unsigned len, unsigned flags, | |
881 | struct page **pagep, void **fsdata); | |
882 | extern int afs_write_end(struct file *file, struct address_space *mapping, | |
883 | loff_t pos, unsigned len, unsigned copied, | |
884 | struct page *page, void *fsdata); | |
31143d5d DH |
885 | extern int afs_writepage(struct page *, struct writeback_control *); |
886 | extern int afs_writepages(struct address_space *, struct writeback_control *); | |
31143d5d | 887 | extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); |
50b5551d | 888 | extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); |
31143d5d | 889 | extern int afs_writeback_all(struct afs_vnode *); |
58fed94d | 890 | extern int afs_flush(struct file *, fl_owner_t); |
02c24a82 | 891 | extern int afs_fsync(struct file *, loff_t, loff_t, int); |
31143d5d | 892 | |
d3e3b7ea DH |
893 | /* |
894 | * xattr.c | |
895 | */ | |
896 | extern const struct xattr_handler *afs_xattr_handlers[]; | |
897 | extern ssize_t afs_listxattr(struct dentry *, char *, size_t); | |
31143d5d | 898 | |
d2ddc776 DH |
899 | |
900 | /* | |
901 | * Miscellaneous inline functions. | |
902 | */ | |
903 | static inline struct afs_vnode *AFS_FS_I(struct inode *inode) | |
904 | { | |
905 | return container_of(inode, struct afs_vnode, vfs_inode); | |
906 | } | |
907 | ||
908 | static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) | |
909 | { | |
910 | return &vnode->vfs_inode; | |
911 | } | |
912 | ||
913 | static inline void afs_vnode_commit_status(struct afs_fs_cursor *fc, | |
914 | struct afs_vnode *vnode, | |
915 | unsigned int cb_break) | |
916 | { | |
917 | if (fc->ac.error == 0) | |
918 | afs_cache_permit(vnode, fc->key, cb_break); | |
919 | } | |
920 | ||
921 | static inline void afs_check_for_remote_deletion(struct afs_fs_cursor *fc, | |
922 | struct afs_vnode *vnode) | |
923 | { | |
924 | if (fc->ac.error == -ENOENT) { | |
925 | set_bit(AFS_VNODE_DELETED, &vnode->flags); | |
926 | afs_break_callback(vnode); | |
927 | } | |
928 | } | |
929 | ||
930 | ||
08e0e7c8 DH |
931 | /*****************************************************************************/ |
932 | /* | |
933 | * debug tracing | |
934 | */ | |
8e8d7f13 DH |
935 | #include <trace/events/afs.h> |
936 | ||
08e0e7c8 DH |
937 | extern unsigned afs_debug; |
938 | ||
939 | #define dbgprintk(FMT,...) \ | |
ad16df84 | 940 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
08e0e7c8 | 941 | |
530b6412 HH |
942 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
943 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
08e0e7c8 DH |
944 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
945 | ||
946 | ||
947 | #if defined(__KDEBUG) | |
948 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
949 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
950 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
951 | ||
952 | #elif defined(CONFIG_AFS_DEBUG) | |
953 | #define AFS_DEBUG_KENTER 0x01 | |
954 | #define AFS_DEBUG_KLEAVE 0x02 | |
955 | #define AFS_DEBUG_KDEBUG 0x04 | |
956 | ||
957 | #define _enter(FMT,...) \ | |
958 | do { \ | |
959 | if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ | |
960 | kenter(FMT,##__VA_ARGS__); \ | |
961 | } while (0) | |
962 | ||
963 | #define _leave(FMT,...) \ | |
964 | do { \ | |
965 | if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ | |
966 | kleave(FMT,##__VA_ARGS__); \ | |
967 | } while (0) | |
968 | ||
969 | #define _debug(FMT,...) \ | |
970 | do { \ | |
971 | if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ | |
972 | kdebug(FMT,##__VA_ARGS__); \ | |
973 | } while (0) | |
974 | ||
975 | #else | |
12fdff3f DH |
976 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
977 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
978 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
08e0e7c8 DH |
979 | #endif |
980 | ||
981 | /* | |
982 | * debug assertion checking | |
983 | */ | |
984 | #if 1 // defined(__KDEBUGALL) | |
985 | ||
986 | #define ASSERT(X) \ | |
987 | do { \ | |
988 | if (unlikely(!(X))) { \ | |
989 | printk(KERN_ERR "\n"); \ | |
990 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
991 | BUG(); \ | |
992 | } \ | |
993 | } while(0) | |
994 | ||
995 | #define ASSERTCMP(X, OP, Y) \ | |
996 | do { \ | |
997 | if (unlikely(!((X) OP (Y)))) { \ | |
998 | printk(KERN_ERR "\n"); \ | |
999 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1000 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
1001 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1002 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
1003 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1004 | BUG(); \ | |
1005 | } \ | |
1006 | } while(0) | |
1007 | ||
416351f2 DH |
1008 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
1009 | do { \ | |
1010 | if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ | |
1011 | printk(KERN_ERR "\n"); \ | |
1012 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1013 | printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ | |
1014 | (unsigned long)(L), (unsigned long)(N), \ | |
1015 | (unsigned long)(H)); \ | |
1016 | printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ | |
1017 | (unsigned long)(L), (unsigned long)(N), \ | |
1018 | (unsigned long)(H)); \ | |
1019 | BUG(); \ | |
1020 | } \ | |
1021 | } while(0) | |
1022 | ||
08e0e7c8 DH |
1023 | #define ASSERTIF(C, X) \ |
1024 | do { \ | |
1025 | if (unlikely((C) && !(X))) { \ | |
1026 | printk(KERN_ERR "\n"); \ | |
1027 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1028 | BUG(); \ | |
1029 | } \ | |
1030 | } while(0) | |
1031 | ||
1032 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1033 | do { \ | |
1034 | if (unlikely((C) && !((X) OP (Y)))) { \ | |
1035 | printk(KERN_ERR "\n"); \ | |
1036 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1037 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
1038 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1039 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
1040 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1041 | BUG(); \ | |
1042 | } \ | |
1043 | } while(0) | |
1044 | ||
1045 | #else | |
1046 | ||
1047 | #define ASSERT(X) \ | |
1048 | do { \ | |
1049 | } while(0) | |
1050 | ||
1051 | #define ASSERTCMP(X, OP, Y) \ | |
1052 | do { \ | |
1053 | } while(0) | |
1054 | ||
416351f2 DH |
1055 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
1056 | do { \ | |
1057 | } while(0) | |
1058 | ||
08e0e7c8 DH |
1059 | #define ASSERTIF(C, X) \ |
1060 | do { \ | |
1061 | } while(0) | |
1062 | ||
1063 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1064 | do { \ | |
1065 | } while(0) | |
1066 | ||
1067 | #endif /* __KDEBUGALL */ |