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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 | 53 | enum afs_call_state { |
98bf40cd DH |
54 | AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ |
55 | AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ | |
56 | AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ | |
57 | AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ | |
58 | AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ | |
59 | AFS_CALL_SV_REPLYING, /* Server: Replying */ | |
60 | AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ | |
61 | AFS_CALL_COMPLETE, /* Completed or failed */ | |
8e8d7f13 | 62 | }; |
f044c884 | 63 | |
8b2a464c DH |
64 | /* |
65 | * List of server addresses. | |
66 | */ | |
67 | struct afs_addr_list { | |
68 | struct rcu_head rcu; /* Must be first */ | |
69 | refcount_t usage; | |
d2ddc776 | 70 | u32 version; /* Version */ |
8b2a464c DH |
71 | unsigned short nr_addrs; |
72 | unsigned short index; /* Address currently in use */ | |
d2ddc776 | 73 | unsigned short nr_ipv4; /* Number of IPv4 addresses */ |
bf99a53c DH |
74 | unsigned long probed; /* Mask of servers that have been probed */ |
75 | unsigned long yfs; /* Mask of servers that are YFS */ | |
8b2a464c DH |
76 | struct sockaddr_rxrpc addrs[]; |
77 | }; | |
78 | ||
08e0e7c8 DH |
79 | /* |
80 | * a record of an in-progress RxRPC call | |
81 | */ | |
82 | struct afs_call { | |
83 | const struct afs_call_type *type; /* type of call */ | |
08e0e7c8 | 84 | wait_queue_head_t waitq; /* processes awaiting completion */ |
341f741f | 85 | struct work_struct async_work; /* async I/O processor */ |
08e0e7c8 | 86 | struct work_struct work; /* actual work processor */ |
08e0e7c8 DH |
87 | struct rxrpc_call *rxcall; /* RxRPC call handle */ |
88 | struct key *key; /* security for this call */ | |
f044c884 | 89 | struct afs_net *net; /* The network namespace */ |
d0676a16 | 90 | struct afs_server *cm_server; /* Server affected by incoming CM call */ |
d2ddc776 | 91 | struct afs_cb_interest *cbi; /* Callback interest for server used */ |
08e0e7c8 | 92 | void *request; /* request data (first part) */ |
4343d008 | 93 | struct address_space *mapping; /* Pages being written from */ |
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; |
98bf40cd | 101 | spinlock_t state_lock; |
08e0e7c8 | 102 | int error; /* error code */ |
d001648e | 103 | u32 abort_code; /* Remote abort ID or 0 */ |
08e0e7c8 DH |
104 | unsigned request_size; /* size of request data */ |
105 | unsigned reply_max; /* maximum size of reply */ | |
31143d5d | 106 | unsigned first_offset; /* offset into mapping[first] */ |
c435ee34 | 107 | unsigned int cb_break; /* cb_break + cb_s_break before the call */ |
bcd89270 MD |
108 | union { |
109 | unsigned last_to; /* amount of mapping[last] */ | |
110 | unsigned count2; /* count used in unmarshalling */ | |
111 | }; | |
08e0e7c8 DH |
112 | unsigned char unmarshall; /* unmarshalling phase */ |
113 | bool incoming; /* T if incoming call */ | |
31143d5d | 114 | bool send_pages; /* T if data from mapping should be sent */ |
d001648e | 115 | bool need_attention; /* T if RxRPC poked us */ |
56ff9c83 | 116 | bool async; /* T if asynchronous */ |
33cd7f2b | 117 | bool ret_reply0; /* T if should return reply[0] on success */ |
a68f4a27 | 118 | bool upgrade; /* T to request service upgrade */ |
bf99a53c | 119 | u16 service_id; /* Actual service ID (after upgrade) */ |
50a2c953 | 120 | u32 operation_ID; /* operation ID for an incoming call */ |
08e0e7c8 DH |
121 | u32 count; /* count for use in unmarshalling */ |
122 | __be32 tmp; /* place to extract temporary data */ | |
31143d5d | 123 | afs_dataversion_t store_version; /* updated version expected from store */ |
08e0e7c8 DH |
124 | }; |
125 | ||
126 | struct afs_call_type { | |
00d3b7a4 | 127 | const char *name; |
025db80c | 128 | unsigned int op; /* Really enum afs_fs_operation */ |
00d3b7a4 | 129 | |
08e0e7c8 DH |
130 | /* deliver request or reply data to an call |
131 | * - returning an error will cause the call to be aborted | |
132 | */ | |
d001648e | 133 | int (*deliver)(struct afs_call *call); |
08e0e7c8 | 134 | |
08e0e7c8 DH |
135 | /* clean up a call */ |
136 | void (*destructor)(struct afs_call *call); | |
341f741f DH |
137 | |
138 | /* Work function */ | |
139 | void (*work)(struct work_struct *work); | |
08e0e7c8 DH |
140 | }; |
141 | ||
4343d008 DH |
142 | /* |
143 | * Key available for writeback on a file. | |
144 | */ | |
145 | struct afs_wb_key { | |
146 | refcount_t usage; | |
147 | struct key *key; | |
148 | struct list_head vnode_link; /* Link in vnode->wb_keys */ | |
149 | }; | |
150 | ||
215804a9 DH |
151 | /* |
152 | * AFS open file information record. Pointed to by file->private_data. | |
153 | */ | |
154 | struct afs_file { | |
155 | struct key *key; /* The key this file was opened with */ | |
4343d008 | 156 | struct afs_wb_key *wb; /* Writeback key record for this file */ |
215804a9 DH |
157 | }; |
158 | ||
159 | static inline struct key *afs_file_key(struct file *file) | |
160 | { | |
161 | struct afs_file *af = file->private_data; | |
162 | ||
163 | return af->key; | |
164 | } | |
165 | ||
196ee9cd DH |
166 | /* |
167 | * Record of an outstanding read operation on a vnode. | |
168 | */ | |
169 | struct afs_read { | |
170 | loff_t pos; /* Where to start reading */ | |
e8e581a8 | 171 | loff_t len; /* How much we're asking for */ |
196ee9cd | 172 | loff_t actual_len; /* How much we're actually getting */ |
6a0e3999 | 173 | loff_t remain; /* Amount remaining */ |
196ee9cd | 174 | atomic_t usage; |
196ee9cd | 175 | unsigned int index; /* Which page we're reading into */ |
196ee9cd DH |
176 | unsigned int nr_pages; |
177 | void (*page_done)(struct afs_call *, struct afs_read *); | |
178 | struct page *pages[]; | |
179 | }; | |
180 | ||
08e0e7c8 DH |
181 | /* |
182 | * AFS superblock private data | |
183 | * - there's one superblock per volume | |
184 | */ | |
185 | struct afs_super_info { | |
f044c884 | 186 | struct afs_net *net; /* Network namespace */ |
49566f6f | 187 | struct afs_cell *cell; /* The cell in which the volume resides */ |
08e0e7c8 | 188 | struct afs_volume *volume; /* volume record */ |
08e0e7c8 | 189 | }; |
1da177e4 | 190 | |
08e0e7c8 DH |
191 | static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
192 | { | |
193 | return sb->s_fs_info; | |
1da177e4 LT |
194 | } |
195 | ||
08e0e7c8 DH |
196 | extern struct file_system_type afs_fs_type; |
197 | ||
f044c884 DH |
198 | /* |
199 | * AFS network namespace record. | |
200 | */ | |
201 | struct afs_net { | |
202 | struct afs_uuid uuid; | |
203 | bool live; /* F if this namespace is being removed */ | |
204 | ||
205 | /* AF_RXRPC I/O stuff */ | |
206 | struct socket *socket; | |
207 | struct afs_call *spare_incoming_call; | |
208 | struct work_struct charge_preallocation_work; | |
209 | struct mutex socket_mutex; | |
210 | atomic_t nr_outstanding_calls; | |
211 | atomic_t nr_superblocks; | |
212 | ||
213 | /* Cell database */ | |
989782dc | 214 | struct rb_root cells; |
f044c884 | 215 | struct afs_cell *ws_cell; |
989782dc DH |
216 | struct work_struct cells_manager; |
217 | struct timer_list cells_timer; | |
218 | atomic_t cells_outstanding; | |
219 | seqlock_t cells_lock; | |
f044c884 | 220 | |
989782dc | 221 | spinlock_t proc_cells_lock; |
f044c884 DH |
222 | struct list_head proc_cells; |
223 | ||
d2ddc776 DH |
224 | /* Known servers. Theoretically each fileserver can only be in one |
225 | * cell, but in practice, people create aliases and subsets and there's | |
226 | * no easy way to distinguish them. | |
227 | */ | |
228 | seqlock_t fs_lock; /* For fs_servers */ | |
229 | struct rb_root fs_servers; /* afs_server (by server UUID or address) */ | |
230 | struct list_head fs_updates; /* afs_server (by update_at) */ | |
231 | struct hlist_head fs_proc; /* procfs servers list */ | |
f044c884 | 232 | |
d2ddc776 DH |
233 | struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ |
234 | struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */ | |
235 | seqlock_t fs_addr_lock; /* For fs_addresses[46] */ | |
f044c884 | 236 | |
d2ddc776 DH |
237 | struct work_struct fs_manager; |
238 | struct timer_list fs_timer; | |
59fa1c4a | 239 | atomic_t servers_outstanding; |
f044c884 | 240 | |
d2ddc776 DH |
241 | /* File locking renewal management */ |
242 | struct mutex lock_manager_mutex; | |
243 | ||
f044c884 DH |
244 | /* Misc */ |
245 | struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ | |
246 | }; | |
247 | ||
248 | extern struct afs_net __afs_net;// Dummy AFS network namespace; TODO: replace with real netns | |
249 | ||
989782dc DH |
250 | enum afs_cell_state { |
251 | AFS_CELL_UNSET, | |
252 | AFS_CELL_ACTIVATING, | |
253 | AFS_CELL_ACTIVE, | |
254 | AFS_CELL_DEACTIVATING, | |
255 | AFS_CELL_INACTIVE, | |
256 | AFS_CELL_FAILED, | |
257 | }; | |
258 | ||
08e0e7c8 | 259 | /* |
d2ddc776 DH |
260 | * AFS cell record. |
261 | * | |
262 | * This is a tricky concept to get right as it is possible to create aliases | |
263 | * simply by pointing AFSDB/SRV records for two names at the same set of VL | |
264 | * servers; it is also possible to do things like setting up two sets of VL | |
265 | * servers, one of which provides a superset of the volumes provided by the | |
266 | * other (for internal/external division, for example). | |
267 | * | |
268 | * Cells only exist in the sense that (a) a cell's name maps to a set of VL | |
269 | * servers and (b) a cell's name is used by the client to select the key to use | |
270 | * for authentication and encryption. The cell name is not typically used in | |
271 | * the protocol. | |
272 | * | |
273 | * There is no easy way to determine if two cells are aliases or one is a | |
274 | * subset of another. | |
08e0e7c8 DH |
275 | */ |
276 | struct afs_cell { | |
989782dc DH |
277 | union { |
278 | struct rcu_head rcu; | |
279 | struct rb_node net_node; /* Node in net->cells */ | |
280 | }; | |
281 | struct afs_net *net; | |
00d3b7a4 | 282 | struct key *anonymous_key; /* anonymous user key for this cell */ |
989782dc | 283 | struct work_struct manager; /* Manager for init/deinit/dns */ |
08e0e7c8 | 284 | struct list_head proc_link; /* /proc cell list link */ |
9b3f26c9 DH |
285 | #ifdef CONFIG_AFS_FSCACHE |
286 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 287 | #endif |
989782dc DH |
288 | time64_t dns_expiry; /* Time AFSDB/SRV record expires */ |
289 | time64_t last_inactive; /* Time of last drop of usage count */ | |
290 | atomic_t usage; | |
291 | unsigned long flags; | |
292 | #define AFS_CELL_FL_NOT_READY 0 /* The cell record is not ready for use */ | |
293 | #define AFS_CELL_FL_NO_GC 1 /* The cell was added manually, don't auto-gc */ | |
294 | #define AFS_CELL_FL_NOT_FOUND 2 /* Permanent DNS error */ | |
295 | #define AFS_CELL_FL_DNS_FAIL 3 /* Failed to access DNS */ | |
8b2a464c | 296 | #define AFS_CELL_FL_NO_LOOKUP_YET 4 /* Not completed first DNS lookup yet */ |
989782dc DH |
297 | enum afs_cell_state state; |
298 | short error; | |
299 | ||
d2ddc776 DH |
300 | /* Active fileserver interaction state. */ |
301 | struct list_head proc_volumes; /* procfs volume list */ | |
302 | rwlock_t proc_lock; | |
989782dc | 303 | |
d2ddc776 | 304 | /* VL server list. */ |
8b2a464c DH |
305 | rwlock_t vl_addrs_lock; /* Lock on vl_addrs */ |
306 | struct afs_addr_list __rcu *vl_addrs; /* List of VL servers */ | |
989782dc DH |
307 | u8 name_len; /* Length of name */ |
308 | char name[64 + 1]; /* Cell name, case-flattened and NUL-padded */ | |
08e0e7c8 DH |
309 | }; |
310 | ||
311 | /* | |
d2ddc776 DH |
312 | * Cached VLDB entry. |
313 | * | |
314 | * This is pointed to by cell->vldb_entries, indexed by name. | |
08e0e7c8 | 315 | */ |
d2ddc776 DH |
316 | struct afs_vldb_entry { |
317 | afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ | |
00d3b7a4 | 318 | |
d2ddc776 DH |
319 | unsigned long flags; |
320 | #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ | |
321 | #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ | |
322 | #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ | |
323 | #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ | |
324 | #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ | |
325 | ||
326 | uuid_t fs_server[AFS_NMAXNSERVERS]; | |
327 | u8 fs_mask[AFS_NMAXNSERVERS]; | |
08e0e7c8 DH |
328 | #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ |
329 | #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ | |
330 | #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ | |
d2ddc776 DH |
331 | short error; |
332 | u8 nr_servers; /* Number of server records */ | |
333 | u8 name_len; | |
334 | u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ | |
08e0e7c8 DH |
335 | }; |
336 | ||
337 | /* | |
d2ddc776 | 338 | * Record of fileserver with which we're actively communicating. |
08e0e7c8 DH |
339 | */ |
340 | struct afs_server { | |
d2ddc776 DH |
341 | struct rcu_head rcu; |
342 | union { | |
343 | uuid_t uuid; /* Server ID */ | |
344 | struct afs_uuid _uuid; | |
345 | }; | |
346 | ||
347 | struct afs_addr_list __rcu *addresses; | |
348 | struct rb_node uuid_rb; /* Link in net->servers */ | |
349 | struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ | |
350 | struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ | |
351 | struct hlist_node proc_link; /* Link in net->fs_proc */ | |
352 | struct afs_server *gc_next; /* Next server in manager's list */ | |
353 | time64_t put_time; /* Time at which last put */ | |
354 | time64_t update_at; /* Time at which to next update the record */ | |
c435ee34 | 355 | unsigned long flags; |
d2ddc776 DH |
356 | #define AFS_SERVER_FL_NEW 0 /* New server, don't inc cb_s_break */ |
357 | #define AFS_SERVER_FL_NOT_READY 1 /* The record is not ready for use */ | |
358 | #define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */ | |
359 | #define AFS_SERVER_FL_VL_FAIL 3 /* Failed to access VL server */ | |
360 | #define AFS_SERVER_FL_UPDATING 4 | |
361 | #define AFS_SERVER_FL_PROBED 5 /* The fileserver has been probed */ | |
362 | #define AFS_SERVER_FL_PROBING 6 /* Fileserver is being probed */ | |
363 | atomic_t usage; | |
364 | u32 addr_version; /* Address list version */ | |
08e0e7c8 DH |
365 | |
366 | /* file service access */ | |
d2ddc776 | 367 | rwlock_t fs_lock; /* access lock */ |
08e0e7c8 DH |
368 | |
369 | /* callback promise management */ | |
c435ee34 DH |
370 | struct list_head cb_interests; /* List of superblocks using this server */ |
371 | unsigned cb_s_break; /* Break-everything counter. */ | |
372 | rwlock_t cb_break_lock; /* Volume finding lock */ | |
373 | }; | |
374 | ||
375 | /* | |
376 | * Interest by a superblock on a server. | |
377 | */ | |
378 | struct afs_cb_interest { | |
379 | struct list_head cb_link; /* Link in server->cb_interests */ | |
380 | struct afs_server *server; /* Server on which this interest resides */ | |
381 | struct super_block *sb; /* Superblock on which inodes reside */ | |
382 | afs_volid_t vid; /* Volume ID to match */ | |
383 | refcount_t usage; | |
08e0e7c8 DH |
384 | }; |
385 | ||
386 | /* | |
d2ddc776 DH |
387 | * Replaceable server list. |
388 | */ | |
389 | struct afs_server_entry { | |
390 | struct afs_server *server; | |
391 | struct afs_cb_interest *cb_interest; | |
392 | }; | |
393 | ||
394 | struct afs_server_list { | |
395 | refcount_t usage; | |
396 | unsigned short nr_servers; | |
397 | unsigned short index; /* Server currently in use */ | |
398 | unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ | |
399 | unsigned int seq; /* Set to ->servers_seq when installed */ | |
62e63147 | 400 | rwlock_t lock; |
d2ddc776 DH |
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 | ||
0fafdc9f DH |
434 | enum afs_lock_state { |
435 | AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ | |
436 | AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ | |
437 | AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ | |
438 | AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ | |
439 | AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ | |
440 | AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ | |
441 | AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ | |
442 | }; | |
443 | ||
08e0e7c8 | 444 | /* |
f8de483e DH |
445 | * AFS inode private data. |
446 | * | |
447 | * Note that afs_alloc_inode() *must* reset anything that could incorrectly | |
448 | * leak from one inode to another. | |
08e0e7c8 DH |
449 | */ |
450 | struct afs_vnode { | |
451 | struct inode vfs_inode; /* the VFS's inode record */ | |
452 | ||
453 | struct afs_volume *volume; /* volume on which vnode resides */ | |
08e0e7c8 DH |
454 | struct afs_fid fid; /* the file identifier for this inode */ |
455 | struct afs_file_status status; /* AFS status info for this file */ | |
9b3f26c9 DH |
456 | #ifdef CONFIG_AFS_FSCACHE |
457 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 458 | #endif |
be080a6f | 459 | struct afs_permits *permit_cache; /* cache of permits so far obtained */ |
d2ddc776 | 460 | struct mutex io_lock; /* Lock for serialising I/O on this mutex */ |
260a9803 | 461 | struct mutex validate_lock; /* lock for validating this vnode */ |
4343d008 | 462 | spinlock_t wb_lock; /* lock for wb_keys */ |
08e0e7c8 DH |
463 | spinlock_t lock; /* waitqueue/flags lock */ |
464 | unsigned long flags; | |
c435ee34 | 465 | #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ |
260a9803 | 466 | #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
c435ee34 | 467 | #define AFS_VNODE_DIR_MODIFIED 2 /* set if dir vnode's data modified */ |
08e0e7c8 DH |
468 | #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ |
469 | #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ | |
470 | #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ | |
0fafdc9f DH |
471 | #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ |
472 | #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ | |
08e0e7c8 | 473 | |
4343d008 | 474 | struct list_head wb_keys; /* List of keys available for writeback */ |
e8d6c554 DH |
475 | struct list_head pending_locks; /* locks waiting to be granted */ |
476 | struct list_head granted_locks; /* locks granted on this file */ | |
477 | struct delayed_work lock_work; /* work to be done in locking */ | |
0fafdc9f DH |
478 | struct key *lock_key; /* Key to be used in lock ops */ |
479 | enum afs_lock_state lock_state : 8; | |
480 | afs_lock_type_t lock_type : 8; | |
31143d5d | 481 | |
08e0e7c8 | 482 | /* outstanding callback notification on this file */ |
c435ee34 DH |
483 | struct afs_cb_interest *cb_interest; /* Server on which this resides */ |
484 | unsigned int cb_s_break; /* Mass break counter on ->server */ | |
485 | unsigned int cb_break; /* Break counter on vnode */ | |
486 | seqlock_t cb_lock; /* Lock for ->cb_interest, ->status, ->cb_*break */ | |
487 | ||
488 | time64_t cb_expires_at; /* time at which callback expires */ | |
08e0e7c8 | 489 | unsigned cb_version; /* callback version */ |
08e0e7c8 | 490 | afs_callback_type_t cb_type; /* type of callback */ |
08e0e7c8 DH |
491 | }; |
492 | ||
00d3b7a4 DH |
493 | /* |
494 | * cached security record for one user's attempt to access a vnode | |
495 | */ | |
496 | struct afs_permit { | |
497 | struct key *key; /* RxRPC ticket holding a security context */ | |
be080a6f | 498 | afs_access_t access; /* CallerAccess value for this key */ |
00d3b7a4 DH |
499 | }; |
500 | ||
501 | /* | |
be080a6f DH |
502 | * Immutable cache of CallerAccess records from attempts to access vnodes. |
503 | * These may be shared between multiple vnodes. | |
00d3b7a4 DH |
504 | */ |
505 | struct afs_permits { | |
be080a6f DH |
506 | struct rcu_head rcu; |
507 | struct hlist_node hash_node; /* Link in hash */ | |
508 | unsigned long h; /* Hash value for this permit list */ | |
509 | refcount_t usage; | |
510 | unsigned short nr_permits; /* Number of records */ | |
511 | bool invalidated; /* Invalidated due to key change */ | |
512 | struct afs_permit permits[]; /* List of permits sorted by key pointer */ | |
00d3b7a4 DH |
513 | }; |
514 | ||
b908fe6b DH |
515 | /* |
516 | * record of one of a system's set of network interfaces | |
517 | */ | |
518 | struct afs_interface { | |
b908fe6b DH |
519 | struct in_addr address; /* IPv4 address bound to interface */ |
520 | struct in_addr netmask; /* netmask applied to address */ | |
521 | unsigned mtu; /* MTU of interface */ | |
522 | }; | |
523 | ||
8b2a464c DH |
524 | /* |
525 | * Cursor for iterating over a server's address list. | |
526 | */ | |
527 | struct afs_addr_cursor { | |
528 | struct afs_addr_list *alist; /* Current address list (pins ref) */ | |
529 | struct sockaddr_rxrpc *addr; | |
d2ddc776 | 530 | u32 abort_code; |
8b2a464c DH |
531 | unsigned short start; /* Starting point in alist->addrs[] */ |
532 | unsigned short index; /* Wrapping offset from start to current addr */ | |
533 | short error; | |
534 | bool begun; /* T if we've begun iteration */ | |
535 | bool responded; /* T if the current address responded */ | |
536 | }; | |
537 | ||
538 | /* | |
539 | * Cursor for iterating over a set of fileservers. | |
540 | */ | |
541 | struct afs_fs_cursor { | |
542 | struct afs_addr_cursor ac; | |
d2ddc776 DH |
543 | struct afs_vnode *vnode; |
544 | struct afs_server_list *server_list; /* Current server list (pins ref) */ | |
545 | struct afs_cb_interest *cbi; /* Server on which this resides (pins ref) */ | |
546 | struct key *key; /* Key for the server */ | |
547 | unsigned int cb_break; /* cb_break + cb_s_break before the call */ | |
548 | unsigned int cb_break_2; /* cb_break + cb_s_break (2nd vnode) */ | |
549 | unsigned char start; /* Initial index in server list */ | |
550 | unsigned char index; /* Number of servers tried beyond start */ | |
551 | unsigned short flags; | |
552 | #define AFS_FS_CURSOR_STOP 0x0001 /* Set to cease iteration */ | |
553 | #define AFS_FS_CURSOR_VBUSY 0x0002 /* Set if seen VBUSY */ | |
554 | #define AFS_FS_CURSOR_VMOVED 0x0004 /* Set if seen VMOVED */ | |
555 | #define AFS_FS_CURSOR_VNOVOL 0x0008 /* Set if seen VNOVOL */ | |
556 | #define AFS_FS_CURSOR_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ | |
557 | #define AFS_FS_CURSOR_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ | |
8b2a464c DH |
558 | }; |
559 | ||
98bf40cd DH |
560 | #include <trace/events/afs.h> |
561 | ||
08e0e7c8 | 562 | /*****************************************************************************/ |
8b2a464c DH |
563 | /* |
564 | * addr_list.c | |
565 | */ | |
566 | static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) | |
567 | { | |
568 | if (alist) | |
569 | refcount_inc(&alist->usage); | |
570 | return alist; | |
571 | } | |
572 | extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, | |
573 | unsigned short, | |
574 | unsigned short); | |
575 | extern void afs_put_addrlist(struct afs_addr_list *); | |
576 | extern struct afs_addr_list *afs_parse_text_addrs(const char *, size_t, char, | |
577 | unsigned short, unsigned short); | |
578 | extern struct afs_addr_list *afs_dns_query(struct afs_cell *, time64_t *); | |
579 | extern bool afs_iterate_addresses(struct afs_addr_cursor *); | |
580 | extern int afs_end_cursor(struct afs_addr_cursor *); | |
581 | extern int afs_set_vl_cursor(struct afs_addr_cursor *, struct afs_cell *); | |
582 | ||
bf99a53c DH |
583 | extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); |
584 | extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); | |
d2ddc776 | 585 | |
9b3f26c9 DH |
586 | /* |
587 | * cache.c | |
588 | */ | |
589 | #ifdef CONFIG_AFS_FSCACHE | |
590 | extern struct fscache_netfs afs_cache_netfs; | |
591 | extern struct fscache_cookie_def afs_cell_cache_index_def; | |
9b3f26c9 DH |
592 | extern struct fscache_cookie_def afs_volume_cache_index_def; |
593 | extern struct fscache_cookie_def afs_vnode_cache_index_def; | |
594 | #else | |
595 | #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
9b3f26c9 DH |
596 | #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) |
597 | #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
598 | #endif | |
599 | ||
08e0e7c8 DH |
600 | /* |
601 | * callback.c | |
602 | */ | |
603 | extern void afs_init_callback_state(struct afs_server *); | |
c435ee34 DH |
604 | extern void afs_break_callback(struct afs_vnode *); |
605 | extern void afs_break_callbacks(struct afs_server *, size_t,struct afs_callback[]); | |
606 | ||
62e63147 DH |
607 | extern int afs_register_server_cb_interest(struct afs_vnode *, |
608 | struct afs_server_list *, unsigned int); | |
c435ee34 | 609 | extern void afs_put_cb_interest(struct afs_net *, struct afs_cb_interest *); |
d2ddc776 | 610 | extern void afs_clear_callback_interests(struct afs_net *, struct afs_server_list *); |
c435ee34 DH |
611 | |
612 | static inline struct afs_cb_interest *afs_get_cb_interest(struct afs_cb_interest *cbi) | |
613 | { | |
62e63147 DH |
614 | if (cbi) |
615 | refcount_inc(&cbi->usage); | |
c435ee34 DH |
616 | return cbi; |
617 | } | |
08e0e7c8 | 618 | |
1da177e4 LT |
619 | /* |
620 | * cell.c | |
621 | */ | |
989782dc DH |
622 | extern int afs_cell_init(struct afs_net *, const char *); |
623 | extern struct afs_cell *afs_lookup_cell_rcu(struct afs_net *, const char *, unsigned); | |
624 | extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, | |
625 | const char *, bool); | |
8b2a464c | 626 | extern struct afs_cell *afs_get_cell(struct afs_cell *); |
9ed900b1 | 627 | extern void afs_put_cell(struct afs_net *, struct afs_cell *); |
989782dc DH |
628 | extern void afs_manage_cells(struct work_struct *); |
629 | extern void afs_cells_timer(struct timer_list *); | |
f044c884 | 630 | extern void __net_exit afs_cell_purge(struct afs_net *); |
08e0e7c8 DH |
631 | |
632 | /* | |
633 | * cmservice.c | |
634 | */ | |
635 | extern bool afs_cm_incoming_call(struct afs_call *); | |
636 | ||
1da177e4 LT |
637 | /* |
638 | * dir.c | |
639 | */ | |
dab17c1a | 640 | extern bool afs_dir_check_page(struct inode *, struct page *); |
754661f1 | 641 | extern const struct inode_operations afs_dir_inode_operations; |
d61dcce2 | 642 | extern const struct dentry_operations afs_fs_dentry_operations; |
4b6f5d20 | 643 | extern const struct file_operations afs_dir_file_operations; |
1da177e4 LT |
644 | |
645 | /* | |
646 | * file.c | |
647 | */ | |
f5e54d6e | 648 | extern const struct address_space_operations afs_fs_aops; |
754661f1 | 649 | extern const struct inode_operations afs_file_inode_operations; |
00d3b7a4 DH |
650 | extern const struct file_operations afs_file_operations; |
651 | ||
4343d008 DH |
652 | extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); |
653 | extern void afs_put_wb_key(struct afs_wb_key *); | |
00d3b7a4 DH |
654 | extern int afs_open(struct inode *, struct file *); |
655 | extern int afs_release(struct inode *, struct file *); | |
d2ddc776 | 656 | extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *); |
f6d335c0 | 657 | extern int afs_page_filler(void *, struct page *); |
196ee9cd | 658 | extern void afs_put_read(struct afs_read *); |
1da177e4 | 659 | |
e8d6c554 DH |
660 | /* |
661 | * flock.c | |
662 | */ | |
f044c884 DH |
663 | extern struct workqueue_struct *afs_lock_manager; |
664 | ||
e8d6c554 DH |
665 | extern void afs_lock_work(struct work_struct *); |
666 | extern void afs_lock_may_be_available(struct afs_vnode *); | |
667 | extern int afs_lock(struct file *, int, struct file_lock *); | |
668 | extern int afs_flock(struct file *, int, struct file_lock *); | |
669 | ||
08e0e7c8 DH |
670 | /* |
671 | * fsclient.c | |
672 | */ | |
d2ddc776 DH |
673 | extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *); |
674 | extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *); | |
675 | extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *); | |
676 | extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t, | |
677 | struct afs_fid *, struct afs_file_status *, struct afs_callback *); | |
678 | extern int afs_fs_remove(struct afs_fs_cursor *, const char *, bool); | |
679 | extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *); | |
680 | extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, | |
681 | struct afs_fid *, struct afs_file_status *); | |
682 | extern int afs_fs_rename(struct afs_fs_cursor *, const char *, | |
683 | struct afs_vnode *, const char *); | |
4343d008 | 684 | extern int afs_fs_store_data(struct afs_fs_cursor *, struct address_space *, |
d2ddc776 DH |
685 | pgoff_t, pgoff_t, unsigned, unsigned); |
686 | extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *); | |
687 | extern int afs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *); | |
688 | extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t); | |
689 | extern int afs_fs_extend_lock(struct afs_fs_cursor *); | |
690 | extern int afs_fs_release_lock(struct afs_fs_cursor *); | |
691 | extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, | |
692 | struct afs_addr_cursor *, struct key *); | |
693 | extern int afs_fs_get_capabilities(struct afs_net *, struct afs_server *, | |
694 | struct afs_addr_cursor *, struct key *); | |
08e0e7c8 | 695 | |
1da177e4 LT |
696 | /* |
697 | * inode.c | |
698 | */ | |
d2ddc776 | 699 | extern int afs_fetch_status(struct afs_vnode *, struct key *); |
c435ee34 | 700 | extern int afs_iget5_test(struct inode *, void *); |
bec5eb61 | 701 | extern struct inode *afs_iget_autocell(struct inode *, const char *, int, |
702 | struct key *); | |
00d3b7a4 | 703 | extern struct inode *afs_iget(struct super_block *, struct key *, |
260a9803 | 704 | struct afs_fid *, struct afs_file_status *, |
d2ddc776 DH |
705 | struct afs_callback *, |
706 | struct afs_cb_interest *); | |
416351f2 | 707 | extern void afs_zap_data(struct afs_vnode *); |
260a9803 | 708 | extern int afs_validate(struct afs_vnode *, struct key *); |
a528d35e | 709 | extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); |
31143d5d | 710 | extern int afs_setattr(struct dentry *, struct iattr *); |
b57922d9 | 711 | extern void afs_evict_inode(struct inode *); |
bec5eb61 | 712 | extern int afs_drop_inode(struct inode *); |
1da177e4 LT |
713 | |
714 | /* | |
715 | * main.c | |
716 | */ | |
0ad53eee | 717 | extern struct workqueue_struct *afs_wq; |
f044c884 DH |
718 | |
719 | static inline struct afs_net *afs_d2net(struct dentry *dentry) | |
720 | { | |
721 | return &__afs_net; | |
722 | } | |
723 | ||
724 | static inline struct afs_net *afs_i2net(struct inode *inode) | |
725 | { | |
726 | return &__afs_net; | |
727 | } | |
728 | ||
729 | static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) | |
730 | { | |
731 | return &__afs_net; | |
732 | } | |
733 | ||
734 | static inline struct afs_net *afs_sock2net(struct sock *sk) | |
735 | { | |
736 | return &__afs_net; | |
737 | } | |
738 | ||
739 | static inline struct afs_net *afs_get_net(struct afs_net *net) | |
740 | { | |
741 | return net; | |
742 | } | |
743 | ||
744 | static inline void afs_put_net(struct afs_net *net) | |
745 | { | |
746 | } | |
1da177e4 | 747 | |
08e0e7c8 DH |
748 | /* |
749 | * misc.c | |
750 | */ | |
751 | extern int afs_abort_to_error(u32); | |
752 | ||
1da177e4 LT |
753 | /* |
754 | * mntpt.c | |
755 | */ | |
754661f1 | 756 | extern const struct inode_operations afs_mntpt_inode_operations; |
bec5eb61 | 757 | extern const struct inode_operations afs_autocell_inode_operations; |
4b6f5d20 | 758 | extern const struct file_operations afs_mntpt_file_operations; |
1da177e4 | 759 | |
d18610b0 | 760 | extern struct vfsmount *afs_d_automount(struct path *); |
08e0e7c8 | 761 | extern void afs_mntpt_kill_timer(void); |
1da177e4 | 762 | |
b4db2b35 AB |
763 | /* |
764 | * netdevices.c | |
765 | */ | |
766 | extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); | |
767 | ||
1da177e4 LT |
768 | /* |
769 | * proc.c | |
770 | */ | |
f044c884 DH |
771 | extern int __net_init afs_proc_init(struct afs_net *); |
772 | extern void __net_exit afs_proc_cleanup(struct afs_net *); | |
773 | extern int afs_proc_cell_setup(struct afs_net *, struct afs_cell *); | |
774 | extern void afs_proc_cell_remove(struct afs_net *, struct afs_cell *); | |
1da177e4 | 775 | |
d2ddc776 DH |
776 | /* |
777 | * rotate.c | |
778 | */ | |
779 | extern bool afs_begin_vnode_operation(struct afs_fs_cursor *, struct afs_vnode *, | |
780 | struct key *); | |
781 | extern bool afs_select_fileserver(struct afs_fs_cursor *); | |
782 | extern bool afs_select_current_fileserver(struct afs_fs_cursor *); | |
783 | extern int afs_end_vnode_operation(struct afs_fs_cursor *); | |
784 | ||
08e0e7c8 DH |
785 | /* |
786 | * rxrpc.c | |
787 | */ | |
f044c884 | 788 | extern struct workqueue_struct *afs_async_calls; |
8324f0bc | 789 | |
f044c884 DH |
790 | extern int __net_init afs_open_socket(struct afs_net *); |
791 | extern void __net_exit afs_close_socket(struct afs_net *); | |
792 | extern void afs_charge_preallocation(struct work_struct *); | |
341f741f DH |
793 | extern void afs_put_call(struct afs_call *); |
794 | extern int afs_queue_call_work(struct afs_call *); | |
8b2a464c | 795 | extern long afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t, bool); |
f044c884 DH |
796 | extern struct afs_call *afs_alloc_flat_call(struct afs_net *, |
797 | const struct afs_call_type *, | |
08e0e7c8 DH |
798 | size_t, size_t); |
799 | extern void afs_flat_call_destructor(struct afs_call *); | |
08e0e7c8 | 800 | extern void afs_send_empty_reply(struct afs_call *); |
b908fe6b | 801 | extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); |
d001648e | 802 | extern int afs_extract_data(struct afs_call *, void *, size_t, bool); |
08e0e7c8 | 803 | |
d001648e | 804 | static inline int afs_transfer_reply(struct afs_call *call) |
372ee163 | 805 | { |
d001648e | 806 | return afs_extract_data(call, call->buffer, call->reply_max, false); |
372ee163 DH |
807 | } |
808 | ||
98bf40cd DH |
809 | static inline bool afs_check_call_state(struct afs_call *call, |
810 | enum afs_call_state state) | |
811 | { | |
812 | return READ_ONCE(call->state) == state; | |
813 | } | |
814 | ||
815 | static inline bool afs_set_call_state(struct afs_call *call, | |
816 | enum afs_call_state from, | |
817 | enum afs_call_state to) | |
818 | { | |
819 | bool ok = false; | |
820 | ||
821 | spin_lock_bh(&call->state_lock); | |
822 | if (call->state == from) { | |
823 | call->state = to; | |
824 | trace_afs_call_state(call, from, to, 0, 0); | |
825 | ok = true; | |
826 | } | |
827 | spin_unlock_bh(&call->state_lock); | |
828 | return ok; | |
829 | } | |
830 | ||
831 | static inline void afs_set_call_complete(struct afs_call *call, | |
832 | int error, u32 remote_abort) | |
833 | { | |
834 | enum afs_call_state state; | |
835 | bool ok = false; | |
836 | ||
837 | spin_lock_bh(&call->state_lock); | |
838 | state = call->state; | |
839 | if (state != AFS_CALL_COMPLETE) { | |
840 | call->abort_code = remote_abort; | |
841 | call->error = error; | |
842 | call->state = AFS_CALL_COMPLETE; | |
843 | trace_afs_call_state(call, state, AFS_CALL_COMPLETE, | |
844 | error, remote_abort); | |
845 | ok = true; | |
846 | } | |
847 | spin_unlock_bh(&call->state_lock); | |
848 | if (ok) | |
849 | trace_afs_call_done(call); | |
850 | } | |
851 | ||
00d3b7a4 DH |
852 | /* |
853 | * security.c | |
854 | */ | |
be080a6f | 855 | extern void afs_put_permits(struct afs_permits *); |
00d3b7a4 | 856 | extern void afs_clear_permits(struct afs_vnode *); |
be080a6f | 857 | extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int); |
416351f2 | 858 | extern void afs_zap_permits(struct rcu_head *); |
00d3b7a4 | 859 | extern struct key *afs_request_key(struct afs_cell *); |
0fafdc9f | 860 | extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); |
10556cb2 | 861 | extern int afs_permission(struct inode *, int); |
be080a6f | 862 | extern void __exit afs_clean_up_permit_cache(void); |
00d3b7a4 | 863 | |
08e0e7c8 DH |
864 | /* |
865 | * server.c | |
866 | */ | |
867 | extern spinlock_t afs_server_peer_lock; | |
868 | ||
c435ee34 DH |
869 | static inline struct afs_server *afs_get_server(struct afs_server *server) |
870 | { | |
871 | atomic_inc(&server->usage); | |
872 | return server; | |
873 | } | |
08e0e7c8 | 874 | |
f044c884 DH |
875 | extern struct afs_server *afs_find_server(struct afs_net *, |
876 | const struct sockaddr_rxrpc *); | |
d2ddc776 DH |
877 | extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); |
878 | extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *); | |
9ed900b1 | 879 | extern void afs_put_server(struct afs_net *, struct afs_server *); |
d2ddc776 DH |
880 | extern void afs_manage_servers(struct work_struct *); |
881 | extern void afs_servers_timer(struct timer_list *); | |
f044c884 | 882 | extern void __net_exit afs_purge_servers(struct afs_net *); |
d2ddc776 DH |
883 | extern bool afs_probe_fileserver(struct afs_fs_cursor *); |
884 | extern bool afs_check_server_record(struct afs_fs_cursor *, struct afs_server *); | |
08e0e7c8 | 885 | |
00d3b7a4 | 886 | /* |
d2ddc776 | 887 | * server_list.c |
00d3b7a4 | 888 | */ |
d2ddc776 DH |
889 | static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) |
890 | { | |
891 | refcount_inc(&slist->usage); | |
892 | return slist; | |
893 | } | |
00d3b7a4 | 894 | |
d2ddc776 DH |
895 | extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); |
896 | extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, | |
897 | struct afs_vldb_entry *, | |
898 | u8); | |
899 | extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); | |
08e0e7c8 DH |
900 | |
901 | /* | |
d2ddc776 | 902 | * super.c |
08e0e7c8 | 903 | */ |
d2ddc776 DH |
904 | extern int __init afs_fs_init(void); |
905 | extern void __exit afs_fs_exit(void); | |
08e0e7c8 DH |
906 | |
907 | /* | |
d2ddc776 | 908 | * vlclient.c |
08e0e7c8 | 909 | */ |
d2ddc776 DH |
910 | extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_net *, |
911 | struct afs_addr_cursor *, | |
912 | struct key *, const char *, int); | |
913 | extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_net *, struct afs_addr_cursor *, | |
914 | struct key *, const uuid_t *); | |
bf99a53c DH |
915 | extern int afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, struct key *); |
916 | extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_net *, struct afs_addr_cursor *, | |
917 | struct key *, const uuid_t *); | |
08e0e7c8 DH |
918 | |
919 | /* | |
920 | * volume.c | |
921 | */ | |
d2ddc776 | 922 | static inline struct afs_volume *__afs_get_volume(struct afs_volume *volume) |
49566f6f DH |
923 | { |
924 | if (volume) | |
925 | atomic_inc(&volume->usage); | |
926 | return volume; | |
927 | } | |
08e0e7c8 | 928 | |
d2ddc776 DH |
929 | extern struct afs_volume *afs_create_volume(struct afs_mount_params *); |
930 | extern void afs_activate_volume(struct afs_volume *); | |
931 | extern void afs_deactivate_volume(struct afs_volume *); | |
9ed900b1 | 932 | extern void afs_put_volume(struct afs_cell *, struct afs_volume *); |
d2ddc776 | 933 | extern int afs_check_volume_status(struct afs_volume *, struct key *); |
08e0e7c8 | 934 | |
31143d5d DH |
935 | /* |
936 | * write.c | |
937 | */ | |
938 | extern int afs_set_page_dirty(struct page *); | |
15b4650e NP |
939 | extern int afs_write_begin(struct file *file, struct address_space *mapping, |
940 | loff_t pos, unsigned len, unsigned flags, | |
941 | struct page **pagep, void **fsdata); | |
942 | extern int afs_write_end(struct file *file, struct address_space *mapping, | |
943 | loff_t pos, unsigned len, unsigned copied, | |
944 | struct page *page, void *fsdata); | |
31143d5d DH |
945 | extern int afs_writepage(struct page *, struct writeback_control *); |
946 | extern int afs_writepages(struct address_space *, struct writeback_control *); | |
31143d5d | 947 | extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); |
50b5551d | 948 | extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); |
58fed94d | 949 | extern int afs_flush(struct file *, fl_owner_t); |
02c24a82 | 950 | extern int afs_fsync(struct file *, loff_t, loff_t, int); |
1cf7a151 | 951 | extern int afs_page_mkwrite(struct vm_fault *); |
4343d008 DH |
952 | extern void afs_prune_wb_keys(struct afs_vnode *); |
953 | extern int afs_launder_page(struct page *); | |
31143d5d | 954 | |
d3e3b7ea DH |
955 | /* |
956 | * xattr.c | |
957 | */ | |
958 | extern const struct xattr_handler *afs_xattr_handlers[]; | |
959 | extern ssize_t afs_listxattr(struct dentry *, char *, size_t); | |
31143d5d | 960 | |
d2ddc776 DH |
961 | |
962 | /* | |
963 | * Miscellaneous inline functions. | |
964 | */ | |
965 | static inline struct afs_vnode *AFS_FS_I(struct inode *inode) | |
966 | { | |
967 | return container_of(inode, struct afs_vnode, vfs_inode); | |
968 | } | |
969 | ||
970 | static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) | |
971 | { | |
972 | return &vnode->vfs_inode; | |
973 | } | |
974 | ||
975 | static inline void afs_vnode_commit_status(struct afs_fs_cursor *fc, | |
976 | struct afs_vnode *vnode, | |
977 | unsigned int cb_break) | |
978 | { | |
979 | if (fc->ac.error == 0) | |
980 | afs_cache_permit(vnode, fc->key, cb_break); | |
981 | } | |
982 | ||
983 | static inline void afs_check_for_remote_deletion(struct afs_fs_cursor *fc, | |
984 | struct afs_vnode *vnode) | |
985 | { | |
986 | if (fc->ac.error == -ENOENT) { | |
987 | set_bit(AFS_VNODE_DELETED, &vnode->flags); | |
988 | afs_break_callback(vnode); | |
989 | } | |
990 | } | |
991 | ||
992 | ||
08e0e7c8 DH |
993 | /*****************************************************************************/ |
994 | /* | |
995 | * debug tracing | |
996 | */ | |
997 | extern unsigned afs_debug; | |
998 | ||
999 | #define dbgprintk(FMT,...) \ | |
ad16df84 | 1000 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
08e0e7c8 | 1001 | |
530b6412 HH |
1002 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1003 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
08e0e7c8 DH |
1004 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
1005 | ||
1006 | ||
1007 | #if defined(__KDEBUG) | |
1008 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
1009 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
1010 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
1011 | ||
1012 | #elif defined(CONFIG_AFS_DEBUG) | |
1013 | #define AFS_DEBUG_KENTER 0x01 | |
1014 | #define AFS_DEBUG_KLEAVE 0x02 | |
1015 | #define AFS_DEBUG_KDEBUG 0x04 | |
1016 | ||
1017 | #define _enter(FMT,...) \ | |
1018 | do { \ | |
1019 | if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ | |
1020 | kenter(FMT,##__VA_ARGS__); \ | |
1021 | } while (0) | |
1022 | ||
1023 | #define _leave(FMT,...) \ | |
1024 | do { \ | |
1025 | if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ | |
1026 | kleave(FMT,##__VA_ARGS__); \ | |
1027 | } while (0) | |
1028 | ||
1029 | #define _debug(FMT,...) \ | |
1030 | do { \ | |
1031 | if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ | |
1032 | kdebug(FMT,##__VA_ARGS__); \ | |
1033 | } while (0) | |
1034 | ||
1035 | #else | |
12fdff3f DH |
1036 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1037 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
1038 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
08e0e7c8 DH |
1039 | #endif |
1040 | ||
1041 | /* | |
1042 | * debug assertion checking | |
1043 | */ | |
1044 | #if 1 // defined(__KDEBUGALL) | |
1045 | ||
1046 | #define ASSERT(X) \ | |
1047 | do { \ | |
1048 | if (unlikely(!(X))) { \ | |
1049 | printk(KERN_ERR "\n"); \ | |
1050 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1051 | BUG(); \ | |
1052 | } \ | |
1053 | } while(0) | |
1054 | ||
1055 | #define ASSERTCMP(X, OP, Y) \ | |
1056 | do { \ | |
1057 | if (unlikely(!((X) OP (Y)))) { \ | |
1058 | printk(KERN_ERR "\n"); \ | |
1059 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1060 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
1061 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1062 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
1063 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1064 | BUG(); \ | |
1065 | } \ | |
1066 | } while(0) | |
1067 | ||
416351f2 DH |
1068 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
1069 | do { \ | |
1070 | if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ | |
1071 | printk(KERN_ERR "\n"); \ | |
1072 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1073 | printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ | |
1074 | (unsigned long)(L), (unsigned long)(N), \ | |
1075 | (unsigned long)(H)); \ | |
1076 | printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ | |
1077 | (unsigned long)(L), (unsigned long)(N), \ | |
1078 | (unsigned long)(H)); \ | |
1079 | BUG(); \ | |
1080 | } \ | |
1081 | } while(0) | |
1082 | ||
08e0e7c8 DH |
1083 | #define ASSERTIF(C, X) \ |
1084 | do { \ | |
1085 | if (unlikely((C) && !(X))) { \ | |
1086 | printk(KERN_ERR "\n"); \ | |
1087 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1088 | BUG(); \ | |
1089 | } \ | |
1090 | } while(0) | |
1091 | ||
1092 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1093 | do { \ | |
1094 | if (unlikely((C) && !((X) OP (Y)))) { \ | |
1095 | printk(KERN_ERR "\n"); \ | |
1096 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1097 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
1098 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1099 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
1100 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1101 | BUG(); \ | |
1102 | } \ | |
1103 | } while(0) | |
1104 | ||
1105 | #else | |
1106 | ||
1107 | #define ASSERT(X) \ | |
1108 | do { \ | |
1109 | } while(0) | |
1110 | ||
1111 | #define ASSERTCMP(X, OP, Y) \ | |
1112 | do { \ | |
1113 | } while(0) | |
1114 | ||
416351f2 DH |
1115 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
1116 | do { \ | |
1117 | } while(0) | |
1118 | ||
08e0e7c8 DH |
1119 | #define ASSERTIF(C, X) \ |
1120 | do { \ | |
1121 | } while(0) | |
1122 | ||
1123 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1124 | do { \ | |
1125 | } while(0) | |
1126 | ||
1127 | #endif /* __KDEBUGALL */ |