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 */ |
4d673da1 | 39 | bool dyn_root; /* T if dynamic root */ |
00d3b7a4 DH |
40 | afs_voltype_t type; /* type of volume requested */ |
41 | int volnamesz; /* size of volume name */ | |
42 | const char *volname; /* name of volume to mount */ | |
f044c884 | 43 | struct afs_net *net; /* Network namespace in effect */ |
00d3b7a4 DH |
44 | struct afs_cell *cell; /* cell in which to find volume */ |
45 | struct afs_volume *volume; /* volume record */ | |
46 | struct key *key; /* key to use for secure mounting */ | |
47 | }; | |
48 | ||
c435ee34 DH |
49 | struct afs_iget_data { |
50 | struct afs_fid fid; | |
51 | struct afs_volume *volume; /* volume on which resides */ | |
52 | }; | |
53 | ||
8e8d7f13 | 54 | enum afs_call_state { |
98bf40cd DH |
55 | AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ |
56 | AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ | |
57 | AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ | |
58 | AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ | |
59 | AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ | |
60 | AFS_CALL_SV_REPLYING, /* Server: Replying */ | |
61 | AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ | |
62 | AFS_CALL_COMPLETE, /* Completed or failed */ | |
8e8d7f13 | 63 | }; |
f044c884 | 64 | |
8b2a464c DH |
65 | /* |
66 | * List of server addresses. | |
67 | */ | |
68 | struct afs_addr_list { | |
69 | struct rcu_head rcu; /* Must be first */ | |
70 | refcount_t usage; | |
d2ddc776 | 71 | u32 version; /* Version */ |
8b2a464c DH |
72 | unsigned short nr_addrs; |
73 | unsigned short index; /* Address currently in use */ | |
d2ddc776 | 74 | unsigned short nr_ipv4; /* Number of IPv4 addresses */ |
bf99a53c DH |
75 | unsigned long probed; /* Mask of servers that have been probed */ |
76 | unsigned long yfs; /* Mask of servers that are YFS */ | |
8b2a464c DH |
77 | struct sockaddr_rxrpc addrs[]; |
78 | }; | |
79 | ||
08e0e7c8 DH |
80 | /* |
81 | * a record of an in-progress RxRPC call | |
82 | */ | |
83 | struct afs_call { | |
84 | const struct afs_call_type *type; /* type of call */ | |
08e0e7c8 | 85 | wait_queue_head_t waitq; /* processes awaiting completion */ |
341f741f | 86 | struct work_struct async_work; /* async I/O processor */ |
08e0e7c8 | 87 | struct work_struct work; /* actual work processor */ |
08e0e7c8 DH |
88 | struct rxrpc_call *rxcall; /* RxRPC call handle */ |
89 | struct key *key; /* security for this call */ | |
f044c884 | 90 | struct afs_net *net; /* The network namespace */ |
d0676a16 | 91 | struct afs_server *cm_server; /* Server affected by incoming CM call */ |
d2ddc776 | 92 | struct afs_cb_interest *cbi; /* Callback interest for server used */ |
08e0e7c8 | 93 | void *request; /* request data (first part) */ |
4343d008 | 94 | struct address_space *mapping; /* Pages being written from */ |
08e0e7c8 | 95 | void *buffer; /* reply receive buffer */ |
97e3043a | 96 | void *reply[4]; /* Where to put the reply */ |
31143d5d DH |
97 | pgoff_t first; /* first page in mapping to deal with */ |
98 | pgoff_t last; /* last page in mapping to deal with */ | |
d001648e | 99 | size_t offset; /* offset into received data store */ |
341f741f | 100 | atomic_t usage; |
8e8d7f13 | 101 | enum afs_call_state state; |
98bf40cd | 102 | spinlock_t state_lock; |
08e0e7c8 | 103 | int error; /* error code */ |
d001648e | 104 | u32 abort_code; /* Remote abort ID or 0 */ |
08e0e7c8 DH |
105 | unsigned request_size; /* size of request data */ |
106 | unsigned reply_max; /* maximum size of reply */ | |
31143d5d | 107 | unsigned first_offset; /* offset into mapping[first] */ |
c435ee34 | 108 | unsigned int cb_break; /* cb_break + cb_s_break before the call */ |
bcd89270 MD |
109 | union { |
110 | unsigned last_to; /* amount of mapping[last] */ | |
111 | unsigned count2; /* count used in unmarshalling */ | |
112 | }; | |
08e0e7c8 DH |
113 | unsigned char unmarshall; /* unmarshalling phase */ |
114 | bool incoming; /* T if incoming call */ | |
31143d5d | 115 | bool send_pages; /* T if data from mapping should be sent */ |
d001648e | 116 | bool need_attention; /* T if RxRPC poked us */ |
56ff9c83 | 117 | bool async; /* T if asynchronous */ |
33cd7f2b | 118 | bool ret_reply0; /* T if should return reply[0] on success */ |
a68f4a27 | 119 | bool upgrade; /* T to request service upgrade */ |
bf99a53c | 120 | u16 service_id; /* Actual service ID (after upgrade) */ |
a25e21f0 | 121 | unsigned int debug_id; /* Trace ID */ |
50a2c953 | 122 | u32 operation_ID; /* operation ID for an incoming call */ |
08e0e7c8 DH |
123 | u32 count; /* count for use in unmarshalling */ |
124 | __be32 tmp; /* place to extract temporary data */ | |
0c3a5ac2 DH |
125 | afs_dataversion_t expected_version; /* Updated version expected from store */ |
126 | afs_dataversion_t expected_version_2; /* 2nd updated version expected from store */ | |
08e0e7c8 DH |
127 | }; |
128 | ||
129 | struct afs_call_type { | |
00d3b7a4 | 130 | const char *name; |
025db80c | 131 | unsigned int op; /* Really enum afs_fs_operation */ |
00d3b7a4 | 132 | |
08e0e7c8 DH |
133 | /* deliver request or reply data to an call |
134 | * - returning an error will cause the call to be aborted | |
135 | */ | |
d001648e | 136 | int (*deliver)(struct afs_call *call); |
08e0e7c8 | 137 | |
08e0e7c8 DH |
138 | /* clean up a call */ |
139 | void (*destructor)(struct afs_call *call); | |
341f741f DH |
140 | |
141 | /* Work function */ | |
142 | void (*work)(struct work_struct *work); | |
08e0e7c8 DH |
143 | }; |
144 | ||
4343d008 DH |
145 | /* |
146 | * Key available for writeback on a file. | |
147 | */ | |
148 | struct afs_wb_key { | |
149 | refcount_t usage; | |
150 | struct key *key; | |
151 | struct list_head vnode_link; /* Link in vnode->wb_keys */ | |
152 | }; | |
153 | ||
215804a9 DH |
154 | /* |
155 | * AFS open file information record. Pointed to by file->private_data. | |
156 | */ | |
157 | struct afs_file { | |
158 | struct key *key; /* The key this file was opened with */ | |
4343d008 | 159 | struct afs_wb_key *wb; /* Writeback key record for this file */ |
215804a9 DH |
160 | }; |
161 | ||
162 | static inline struct key *afs_file_key(struct file *file) | |
163 | { | |
164 | struct afs_file *af = file->private_data; | |
165 | ||
166 | return af->key; | |
167 | } | |
168 | ||
196ee9cd DH |
169 | /* |
170 | * Record of an outstanding read operation on a vnode. | |
171 | */ | |
172 | struct afs_read { | |
173 | loff_t pos; /* Where to start reading */ | |
e8e581a8 | 174 | loff_t len; /* How much we're asking for */ |
196ee9cd | 175 | loff_t actual_len; /* How much we're actually getting */ |
6a0e3999 | 176 | loff_t remain; /* Amount remaining */ |
f3ddee8d DH |
177 | loff_t file_size; /* File size returned by server */ |
178 | afs_dataversion_t data_version; /* Version number returned by server */ | |
179 | refcount_t usage; | |
196ee9cd | 180 | unsigned int index; /* Which page we're reading into */ |
196ee9cd DH |
181 | unsigned int nr_pages; |
182 | void (*page_done)(struct afs_call *, struct afs_read *); | |
f3ddee8d DH |
183 | struct page **pages; |
184 | struct page *array[]; | |
196ee9cd DH |
185 | }; |
186 | ||
08e0e7c8 DH |
187 | /* |
188 | * AFS superblock private data | |
189 | * - there's one superblock per volume | |
190 | */ | |
191 | struct afs_super_info { | |
f044c884 | 192 | struct afs_net *net; /* Network namespace */ |
49566f6f | 193 | struct afs_cell *cell; /* The cell in which the volume resides */ |
08e0e7c8 | 194 | struct afs_volume *volume; /* volume record */ |
4d673da1 | 195 | bool dyn_root; /* True if dynamic root */ |
08e0e7c8 | 196 | }; |
1da177e4 | 197 | |
08e0e7c8 DH |
198 | static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
199 | { | |
200 | return sb->s_fs_info; | |
1da177e4 LT |
201 | } |
202 | ||
08e0e7c8 DH |
203 | extern struct file_system_type afs_fs_type; |
204 | ||
6f8880d8 DH |
205 | /* |
206 | * Set of substitutes for @sys. | |
207 | */ | |
208 | struct afs_sysnames { | |
209 | #define AFS_NR_SYSNAME 16 | |
210 | char *subs[AFS_NR_SYSNAME]; | |
211 | refcount_t usage; | |
212 | unsigned short nr; | |
213 | short error; | |
214 | char blank[1]; | |
215 | }; | |
216 | ||
f044c884 DH |
217 | /* |
218 | * AFS network namespace record. | |
219 | */ | |
220 | struct afs_net { | |
221 | struct afs_uuid uuid; | |
222 | bool live; /* F if this namespace is being removed */ | |
223 | ||
224 | /* AF_RXRPC I/O stuff */ | |
225 | struct socket *socket; | |
226 | struct afs_call *spare_incoming_call; | |
227 | struct work_struct charge_preallocation_work; | |
228 | struct mutex socket_mutex; | |
229 | atomic_t nr_outstanding_calls; | |
230 | atomic_t nr_superblocks; | |
231 | ||
232 | /* Cell database */ | |
989782dc | 233 | struct rb_root cells; |
f044c884 | 234 | struct afs_cell *ws_cell; |
989782dc DH |
235 | struct work_struct cells_manager; |
236 | struct timer_list cells_timer; | |
237 | atomic_t cells_outstanding; | |
238 | seqlock_t cells_lock; | |
f044c884 | 239 | |
989782dc | 240 | spinlock_t proc_cells_lock; |
f044c884 DH |
241 | struct list_head proc_cells; |
242 | ||
d2ddc776 DH |
243 | /* Known servers. Theoretically each fileserver can only be in one |
244 | * cell, but in practice, people create aliases and subsets and there's | |
245 | * no easy way to distinguish them. | |
246 | */ | |
247 | seqlock_t fs_lock; /* For fs_servers */ | |
248 | struct rb_root fs_servers; /* afs_server (by server UUID or address) */ | |
249 | struct list_head fs_updates; /* afs_server (by update_at) */ | |
250 | struct hlist_head fs_proc; /* procfs servers list */ | |
f044c884 | 251 | |
d2ddc776 DH |
252 | struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ |
253 | struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */ | |
254 | seqlock_t fs_addr_lock; /* For fs_addresses[46] */ | |
f044c884 | 255 | |
d2ddc776 DH |
256 | struct work_struct fs_manager; |
257 | struct timer_list fs_timer; | |
59fa1c4a | 258 | atomic_t servers_outstanding; |
f044c884 | 259 | |
d2ddc776 DH |
260 | /* File locking renewal management */ |
261 | struct mutex lock_manager_mutex; | |
262 | ||
f044c884 | 263 | /* Misc */ |
d55b4da4 | 264 | struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ |
6f8880d8 DH |
265 | struct afs_sysnames *sysnames; |
266 | rwlock_t sysnames_lock; | |
d55b4da4 DH |
267 | |
268 | /* Statistics counters */ | |
269 | atomic_t n_lookup; /* Number of lookups done */ | |
270 | atomic_t n_reval; /* Number of dentries needing revalidation */ | |
271 | atomic_t n_inval; /* Number of invalidations by the server */ | |
f3ddee8d | 272 | atomic_t n_relpg; /* Number of invalidations by releasepage */ |
d55b4da4 | 273 | atomic_t n_read_dir; /* Number of directory pages read */ |
f044c884 DH |
274 | }; |
275 | ||
6f8880d8 | 276 | extern const char afs_init_sysname[]; |
f044c884 DH |
277 | extern struct afs_net __afs_net;// Dummy AFS network namespace; TODO: replace with real netns |
278 | ||
989782dc DH |
279 | enum afs_cell_state { |
280 | AFS_CELL_UNSET, | |
281 | AFS_CELL_ACTIVATING, | |
282 | AFS_CELL_ACTIVE, | |
283 | AFS_CELL_DEACTIVATING, | |
284 | AFS_CELL_INACTIVE, | |
285 | AFS_CELL_FAILED, | |
286 | }; | |
287 | ||
08e0e7c8 | 288 | /* |
d2ddc776 DH |
289 | * AFS cell record. |
290 | * | |
291 | * This is a tricky concept to get right as it is possible to create aliases | |
292 | * simply by pointing AFSDB/SRV records for two names at the same set of VL | |
293 | * servers; it is also possible to do things like setting up two sets of VL | |
294 | * servers, one of which provides a superset of the volumes provided by the | |
295 | * other (for internal/external division, for example). | |
296 | * | |
297 | * Cells only exist in the sense that (a) a cell's name maps to a set of VL | |
298 | * servers and (b) a cell's name is used by the client to select the key to use | |
299 | * for authentication and encryption. The cell name is not typically used in | |
300 | * the protocol. | |
301 | * | |
302 | * There is no easy way to determine if two cells are aliases or one is a | |
303 | * subset of another. | |
08e0e7c8 DH |
304 | */ |
305 | struct afs_cell { | |
989782dc DH |
306 | union { |
307 | struct rcu_head rcu; | |
308 | struct rb_node net_node; /* Node in net->cells */ | |
309 | }; | |
310 | struct afs_net *net; | |
00d3b7a4 | 311 | struct key *anonymous_key; /* anonymous user key for this cell */ |
989782dc | 312 | struct work_struct manager; /* Manager for init/deinit/dns */ |
08e0e7c8 | 313 | struct list_head proc_link; /* /proc cell list link */ |
9b3f26c9 DH |
314 | #ifdef CONFIG_AFS_FSCACHE |
315 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 316 | #endif |
989782dc DH |
317 | time64_t dns_expiry; /* Time AFSDB/SRV record expires */ |
318 | time64_t last_inactive; /* Time of last drop of usage count */ | |
319 | atomic_t usage; | |
320 | unsigned long flags; | |
321 | #define AFS_CELL_FL_NOT_READY 0 /* The cell record is not ready for use */ | |
322 | #define AFS_CELL_FL_NO_GC 1 /* The cell was added manually, don't auto-gc */ | |
323 | #define AFS_CELL_FL_NOT_FOUND 2 /* Permanent DNS error */ | |
324 | #define AFS_CELL_FL_DNS_FAIL 3 /* Failed to access DNS */ | |
8b2a464c | 325 | #define AFS_CELL_FL_NO_LOOKUP_YET 4 /* Not completed first DNS lookup yet */ |
989782dc DH |
326 | enum afs_cell_state state; |
327 | short error; | |
328 | ||
d2ddc776 DH |
329 | /* Active fileserver interaction state. */ |
330 | struct list_head proc_volumes; /* procfs volume list */ | |
331 | rwlock_t proc_lock; | |
989782dc | 332 | |
d2ddc776 | 333 | /* VL server list. */ |
8b2a464c DH |
334 | rwlock_t vl_addrs_lock; /* Lock on vl_addrs */ |
335 | struct afs_addr_list __rcu *vl_addrs; /* List of VL servers */ | |
989782dc DH |
336 | u8 name_len; /* Length of name */ |
337 | char name[64 + 1]; /* Cell name, case-flattened and NUL-padded */ | |
08e0e7c8 DH |
338 | }; |
339 | ||
340 | /* | |
d2ddc776 DH |
341 | * Cached VLDB entry. |
342 | * | |
343 | * This is pointed to by cell->vldb_entries, indexed by name. | |
08e0e7c8 | 344 | */ |
d2ddc776 DH |
345 | struct afs_vldb_entry { |
346 | afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ | |
00d3b7a4 | 347 | |
d2ddc776 DH |
348 | unsigned long flags; |
349 | #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ | |
350 | #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ | |
351 | #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ | |
352 | #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ | |
353 | #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ | |
354 | ||
355 | uuid_t fs_server[AFS_NMAXNSERVERS]; | |
356 | u8 fs_mask[AFS_NMAXNSERVERS]; | |
08e0e7c8 DH |
357 | #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ |
358 | #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ | |
359 | #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ | |
d2ddc776 DH |
360 | short error; |
361 | u8 nr_servers; /* Number of server records */ | |
362 | u8 name_len; | |
363 | u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ | |
08e0e7c8 DH |
364 | }; |
365 | ||
366 | /* | |
d2ddc776 | 367 | * Record of fileserver with which we're actively communicating. |
08e0e7c8 DH |
368 | */ |
369 | struct afs_server { | |
d2ddc776 DH |
370 | struct rcu_head rcu; |
371 | union { | |
372 | uuid_t uuid; /* Server ID */ | |
373 | struct afs_uuid _uuid; | |
374 | }; | |
375 | ||
376 | struct afs_addr_list __rcu *addresses; | |
377 | struct rb_node uuid_rb; /* Link in net->servers */ | |
378 | struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ | |
379 | struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ | |
380 | struct hlist_node proc_link; /* Link in net->fs_proc */ | |
381 | struct afs_server *gc_next; /* Next server in manager's list */ | |
382 | time64_t put_time; /* Time at which last put */ | |
383 | time64_t update_at; /* Time at which to next update the record */ | |
c435ee34 | 384 | unsigned long flags; |
d2ddc776 DH |
385 | #define AFS_SERVER_FL_NEW 0 /* New server, don't inc cb_s_break */ |
386 | #define AFS_SERVER_FL_NOT_READY 1 /* The record is not ready for use */ | |
387 | #define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */ | |
388 | #define AFS_SERVER_FL_VL_FAIL 3 /* Failed to access VL server */ | |
389 | #define AFS_SERVER_FL_UPDATING 4 | |
390 | #define AFS_SERVER_FL_PROBED 5 /* The fileserver has been probed */ | |
391 | #define AFS_SERVER_FL_PROBING 6 /* Fileserver is being probed */ | |
5cf9dd55 | 392 | #define AFS_SERVER_FL_NO_IBULK 7 /* Fileserver doesn't support FS.InlineBulkStatus */ |
d2ddc776 DH |
393 | atomic_t usage; |
394 | u32 addr_version; /* Address list version */ | |
08e0e7c8 DH |
395 | |
396 | /* file service access */ | |
d2ddc776 | 397 | rwlock_t fs_lock; /* access lock */ |
08e0e7c8 DH |
398 | |
399 | /* callback promise management */ | |
c435ee34 DH |
400 | struct list_head cb_interests; /* List of superblocks using this server */ |
401 | unsigned cb_s_break; /* Break-everything counter. */ | |
402 | rwlock_t cb_break_lock; /* Volume finding lock */ | |
403 | }; | |
404 | ||
405 | /* | |
406 | * Interest by a superblock on a server. | |
407 | */ | |
408 | struct afs_cb_interest { | |
409 | struct list_head cb_link; /* Link in server->cb_interests */ | |
410 | struct afs_server *server; /* Server on which this interest resides */ | |
411 | struct super_block *sb; /* Superblock on which inodes reside */ | |
412 | afs_volid_t vid; /* Volume ID to match */ | |
413 | refcount_t usage; | |
08e0e7c8 DH |
414 | }; |
415 | ||
416 | /* | |
d2ddc776 DH |
417 | * Replaceable server list. |
418 | */ | |
419 | struct afs_server_entry { | |
420 | struct afs_server *server; | |
421 | struct afs_cb_interest *cb_interest; | |
422 | }; | |
423 | ||
424 | struct afs_server_list { | |
425 | refcount_t usage; | |
426 | unsigned short nr_servers; | |
427 | unsigned short index; /* Server currently in use */ | |
428 | unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ | |
429 | unsigned int seq; /* Set to ->servers_seq when installed */ | |
430 | struct afs_server_entry servers[]; | |
431 | }; | |
432 | ||
433 | /* | |
434 | * Live AFS volume management. | |
08e0e7c8 DH |
435 | */ |
436 | struct afs_volume { | |
d2ddc776 | 437 | afs_volid_t vid; /* volume ID */ |
08e0e7c8 | 438 | atomic_t usage; |
d2ddc776 DH |
439 | time64_t update_at; /* Time at which to next update */ |
440 | struct afs_cell *cell; /* Cell to which belongs (pins ref) */ | |
441 | struct list_head proc_link; /* Link in cell->vl_proc */ | |
442 | unsigned long flags; | |
443 | #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ | |
444 | #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ | |
445 | #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ | |
446 | #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ | |
447 | #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ | |
448 | #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ | |
9b3f26c9 DH |
449 | #ifdef CONFIG_AFS_FSCACHE |
450 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 451 | #endif |
d2ddc776 DH |
452 | struct afs_server_list *servers; /* List of servers on which volume resides */ |
453 | rwlock_t servers_lock; /* Lock for ->servers */ | |
454 | unsigned int servers_seq; /* Incremented each time ->servers changes */ | |
455 | ||
08e0e7c8 | 456 | afs_voltype_t type; /* type of volume */ |
d2ddc776 | 457 | short error; |
08e0e7c8 | 458 | char type_force; /* force volume type (suppress R/O -> R/W) */ |
d2ddc776 DH |
459 | u8 name_len; |
460 | u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ | |
08e0e7c8 DH |
461 | }; |
462 | ||
0fafdc9f DH |
463 | enum afs_lock_state { |
464 | AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ | |
465 | AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ | |
466 | AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ | |
467 | AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ | |
468 | AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ | |
469 | AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ | |
470 | AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ | |
471 | }; | |
472 | ||
08e0e7c8 | 473 | /* |
f8de483e DH |
474 | * AFS inode private data. |
475 | * | |
476 | * Note that afs_alloc_inode() *must* reset anything that could incorrectly | |
477 | * leak from one inode to another. | |
08e0e7c8 DH |
478 | */ |
479 | struct afs_vnode { | |
480 | struct inode vfs_inode; /* the VFS's inode record */ | |
481 | ||
482 | struct afs_volume *volume; /* volume on which vnode resides */ | |
08e0e7c8 DH |
483 | struct afs_fid fid; /* the file identifier for this inode */ |
484 | struct afs_file_status status; /* AFS status info for this file */ | |
a4ff7401 | 485 | afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ |
9b3f26c9 DH |
486 | #ifdef CONFIG_AFS_FSCACHE |
487 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 488 | #endif |
fe342cf7 | 489 | struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ |
d2ddc776 | 490 | struct mutex io_lock; /* Lock for serialising I/O on this mutex */ |
260a9803 | 491 | struct mutex validate_lock; /* lock for validating this vnode */ |
4343d008 | 492 | spinlock_t wb_lock; /* lock for wb_keys */ |
08e0e7c8 DH |
493 | spinlock_t lock; /* waitqueue/flags lock */ |
494 | unsigned long flags; | |
c435ee34 | 495 | #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ |
260a9803 | 496 | #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
f3ddee8d | 497 | #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ |
08e0e7c8 DH |
498 | #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ |
499 | #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ | |
500 | #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ | |
0fafdc9f DH |
501 | #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ |
502 | #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ | |
08e0e7c8 | 503 | |
4343d008 | 504 | struct list_head wb_keys; /* List of keys available for writeback */ |
e8d6c554 DH |
505 | struct list_head pending_locks; /* locks waiting to be granted */ |
506 | struct list_head granted_locks; /* locks granted on this file */ | |
507 | struct delayed_work lock_work; /* work to be done in locking */ | |
0fafdc9f DH |
508 | struct key *lock_key; /* Key to be used in lock ops */ |
509 | enum afs_lock_state lock_state : 8; | |
510 | afs_lock_type_t lock_type : 8; | |
31143d5d | 511 | |
08e0e7c8 | 512 | /* outstanding callback notification on this file */ |
c435ee34 DH |
513 | struct afs_cb_interest *cb_interest; /* Server on which this resides */ |
514 | unsigned int cb_s_break; /* Mass break counter on ->server */ | |
515 | unsigned int cb_break; /* Break counter on vnode */ | |
516 | seqlock_t cb_lock; /* Lock for ->cb_interest, ->status, ->cb_*break */ | |
517 | ||
518 | time64_t cb_expires_at; /* time at which callback expires */ | |
08e0e7c8 | 519 | unsigned cb_version; /* callback version */ |
08e0e7c8 | 520 | afs_callback_type_t cb_type; /* type of callback */ |
08e0e7c8 DH |
521 | }; |
522 | ||
00d3b7a4 DH |
523 | /* |
524 | * cached security record for one user's attempt to access a vnode | |
525 | */ | |
526 | struct afs_permit { | |
527 | struct key *key; /* RxRPC ticket holding a security context */ | |
be080a6f | 528 | afs_access_t access; /* CallerAccess value for this key */ |
00d3b7a4 DH |
529 | }; |
530 | ||
531 | /* | |
be080a6f DH |
532 | * Immutable cache of CallerAccess records from attempts to access vnodes. |
533 | * These may be shared between multiple vnodes. | |
00d3b7a4 DH |
534 | */ |
535 | struct afs_permits { | |
be080a6f DH |
536 | struct rcu_head rcu; |
537 | struct hlist_node hash_node; /* Link in hash */ | |
538 | unsigned long h; /* Hash value for this permit list */ | |
539 | refcount_t usage; | |
540 | unsigned short nr_permits; /* Number of records */ | |
541 | bool invalidated; /* Invalidated due to key change */ | |
542 | struct afs_permit permits[]; /* List of permits sorted by key pointer */ | |
00d3b7a4 DH |
543 | }; |
544 | ||
b908fe6b DH |
545 | /* |
546 | * record of one of a system's set of network interfaces | |
547 | */ | |
548 | struct afs_interface { | |
b908fe6b DH |
549 | struct in_addr address; /* IPv4 address bound to interface */ |
550 | struct in_addr netmask; /* netmask applied to address */ | |
551 | unsigned mtu; /* MTU of interface */ | |
552 | }; | |
553 | ||
8b2a464c DH |
554 | /* |
555 | * Cursor for iterating over a server's address list. | |
556 | */ | |
557 | struct afs_addr_cursor { | |
558 | struct afs_addr_list *alist; /* Current address list (pins ref) */ | |
559 | struct sockaddr_rxrpc *addr; | |
d2ddc776 | 560 | u32 abort_code; |
8b2a464c DH |
561 | unsigned short start; /* Starting point in alist->addrs[] */ |
562 | unsigned short index; /* Wrapping offset from start to current addr */ | |
563 | short error; | |
564 | bool begun; /* T if we've begun iteration */ | |
565 | bool responded; /* T if the current address responded */ | |
566 | }; | |
567 | ||
568 | /* | |
569 | * Cursor for iterating over a set of fileservers. | |
570 | */ | |
571 | struct afs_fs_cursor { | |
572 | struct afs_addr_cursor ac; | |
d2ddc776 DH |
573 | struct afs_vnode *vnode; |
574 | struct afs_server_list *server_list; /* Current server list (pins ref) */ | |
575 | struct afs_cb_interest *cbi; /* Server on which this resides (pins ref) */ | |
576 | struct key *key; /* Key for the server */ | |
577 | unsigned int cb_break; /* cb_break + cb_s_break before the call */ | |
578 | unsigned int cb_break_2; /* cb_break + cb_s_break (2nd vnode) */ | |
579 | unsigned char start; /* Initial index in server list */ | |
580 | unsigned char index; /* Number of servers tried beyond start */ | |
581 | unsigned short flags; | |
582 | #define AFS_FS_CURSOR_STOP 0x0001 /* Set to cease iteration */ | |
583 | #define AFS_FS_CURSOR_VBUSY 0x0002 /* Set if seen VBUSY */ | |
584 | #define AFS_FS_CURSOR_VMOVED 0x0004 /* Set if seen VMOVED */ | |
585 | #define AFS_FS_CURSOR_VNOVOL 0x0008 /* Set if seen VNOVOL */ | |
586 | #define AFS_FS_CURSOR_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ | |
587 | #define AFS_FS_CURSOR_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ | |
8b2a464c DH |
588 | }; |
589 | ||
402cb8dd DH |
590 | /* |
591 | * Cache auxiliary data. | |
592 | */ | |
593 | struct afs_vnode_cache_aux { | |
594 | u64 data_version; | |
595 | } __packed; | |
596 | ||
98bf40cd DH |
597 | #include <trace/events/afs.h> |
598 | ||
08e0e7c8 | 599 | /*****************************************************************************/ |
8b2a464c DH |
600 | /* |
601 | * addr_list.c | |
602 | */ | |
603 | static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) | |
604 | { | |
605 | if (alist) | |
606 | refcount_inc(&alist->usage); | |
607 | return alist; | |
608 | } | |
609 | extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, | |
610 | unsigned short, | |
611 | unsigned short); | |
612 | extern void afs_put_addrlist(struct afs_addr_list *); | |
613 | extern struct afs_addr_list *afs_parse_text_addrs(const char *, size_t, char, | |
614 | unsigned short, unsigned short); | |
615 | extern struct afs_addr_list *afs_dns_query(struct afs_cell *, time64_t *); | |
616 | extern bool afs_iterate_addresses(struct afs_addr_cursor *); | |
617 | extern int afs_end_cursor(struct afs_addr_cursor *); | |
618 | extern int afs_set_vl_cursor(struct afs_addr_cursor *, struct afs_cell *); | |
619 | ||
bf99a53c DH |
620 | extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); |
621 | extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); | |
d2ddc776 | 622 | |
9b3f26c9 DH |
623 | /* |
624 | * cache.c | |
625 | */ | |
626 | #ifdef CONFIG_AFS_FSCACHE | |
627 | extern struct fscache_netfs afs_cache_netfs; | |
628 | extern struct fscache_cookie_def afs_cell_cache_index_def; | |
9b3f26c9 DH |
629 | extern struct fscache_cookie_def afs_volume_cache_index_def; |
630 | extern struct fscache_cookie_def afs_vnode_cache_index_def; | |
631 | #else | |
632 | #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
9b3f26c9 DH |
633 | #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) |
634 | #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
635 | #endif | |
636 | ||
08e0e7c8 DH |
637 | /* |
638 | * callback.c | |
639 | */ | |
640 | extern void afs_init_callback_state(struct afs_server *); | |
c435ee34 | 641 | extern void afs_break_callback(struct afs_vnode *); |
5cf9dd55 | 642 | extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break*); |
c435ee34 | 643 | |
d2ddc776 | 644 | extern int afs_register_server_cb_interest(struct afs_vnode *, struct afs_server_entry *); |
c435ee34 | 645 | extern void afs_put_cb_interest(struct afs_net *, struct afs_cb_interest *); |
d2ddc776 | 646 | extern void afs_clear_callback_interests(struct afs_net *, struct afs_server_list *); |
c435ee34 DH |
647 | |
648 | static inline struct afs_cb_interest *afs_get_cb_interest(struct afs_cb_interest *cbi) | |
649 | { | |
650 | refcount_inc(&cbi->usage); | |
651 | return cbi; | |
652 | } | |
08e0e7c8 | 653 | |
1da177e4 LT |
654 | /* |
655 | * cell.c | |
656 | */ | |
989782dc DH |
657 | extern int afs_cell_init(struct afs_net *, const char *); |
658 | extern struct afs_cell *afs_lookup_cell_rcu(struct afs_net *, const char *, unsigned); | |
659 | extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, | |
660 | const char *, bool); | |
8b2a464c | 661 | extern struct afs_cell *afs_get_cell(struct afs_cell *); |
9ed900b1 | 662 | extern void afs_put_cell(struct afs_net *, struct afs_cell *); |
989782dc DH |
663 | extern void afs_manage_cells(struct work_struct *); |
664 | extern void afs_cells_timer(struct timer_list *); | |
f044c884 | 665 | extern void __net_exit afs_cell_purge(struct afs_net *); |
08e0e7c8 DH |
666 | |
667 | /* | |
668 | * cmservice.c | |
669 | */ | |
670 | extern bool afs_cm_incoming_call(struct afs_call *); | |
671 | ||
1da177e4 LT |
672 | /* |
673 | * dir.c | |
674 | */ | |
4d673da1 | 675 | extern const struct file_operations afs_dir_file_operations; |
754661f1 | 676 | extern const struct inode_operations afs_dir_inode_operations; |
f3ddee8d | 677 | extern const struct address_space_operations afs_dir_aops; |
d61dcce2 | 678 | extern const struct dentry_operations afs_fs_dentry_operations; |
4d673da1 | 679 | |
66c7e1d3 DH |
680 | extern void afs_d_release(struct dentry *); |
681 | ||
682 | /* | |
683 | * dynroot.c | |
684 | */ | |
685 | extern const struct file_operations afs_dynroot_file_operations; | |
686 | extern const struct inode_operations afs_dynroot_inode_operations; | |
687 | extern const struct dentry_operations afs_dynroot_dentry_operations; | |
688 | ||
689 | extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); | |
1da177e4 LT |
690 | |
691 | /* | |
692 | * file.c | |
693 | */ | |
f5e54d6e | 694 | extern const struct address_space_operations afs_fs_aops; |
754661f1 | 695 | extern const struct inode_operations afs_file_inode_operations; |
00d3b7a4 DH |
696 | extern const struct file_operations afs_file_operations; |
697 | ||
4343d008 DH |
698 | extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); |
699 | extern void afs_put_wb_key(struct afs_wb_key *); | |
00d3b7a4 DH |
700 | extern int afs_open(struct inode *, struct file *); |
701 | extern int afs_release(struct inode *, struct file *); | |
d2ddc776 | 702 | extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *); |
f6d335c0 | 703 | extern int afs_page_filler(void *, struct page *); |
196ee9cd | 704 | extern void afs_put_read(struct afs_read *); |
1da177e4 | 705 | |
e8d6c554 DH |
706 | /* |
707 | * flock.c | |
708 | */ | |
f044c884 DH |
709 | extern struct workqueue_struct *afs_lock_manager; |
710 | ||
e8d6c554 DH |
711 | extern void afs_lock_work(struct work_struct *); |
712 | extern void afs_lock_may_be_available(struct afs_vnode *); | |
713 | extern int afs_lock(struct file *, int, struct file_lock *); | |
714 | extern int afs_flock(struct file *, int, struct file_lock *); | |
715 | ||
08e0e7c8 DH |
716 | /* |
717 | * fsclient.c | |
718 | */ | |
dd9fbcb8 DH |
719 | #define AFS_VNODE_NOT_YET_SET 0x01 |
720 | #define AFS_VNODE_META_CHANGED 0x02 | |
721 | #define AFS_VNODE_DATA_CHANGED 0x04 | |
722 | extern void afs_update_inode_from_status(struct afs_vnode *, struct afs_file_status *, | |
723 | const afs_dataversion_t *, u8); | |
724 | ||
0c3a5ac2 | 725 | extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *, bool); |
d2ddc776 DH |
726 | extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *); |
727 | extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *); | |
728 | extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t, | |
729 | struct afs_fid *, struct afs_file_status *, struct afs_callback *); | |
730 | extern int afs_fs_remove(struct afs_fs_cursor *, const char *, bool); | |
731 | extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *); | |
732 | extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, | |
733 | struct afs_fid *, struct afs_file_status *); | |
734 | extern int afs_fs_rename(struct afs_fs_cursor *, const char *, | |
735 | struct afs_vnode *, const char *); | |
4343d008 | 736 | extern int afs_fs_store_data(struct afs_fs_cursor *, struct address_space *, |
d2ddc776 DH |
737 | pgoff_t, pgoff_t, unsigned, unsigned); |
738 | extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *); | |
739 | extern int afs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *); | |
740 | extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t); | |
741 | extern int afs_fs_extend_lock(struct afs_fs_cursor *); | |
742 | extern int afs_fs_release_lock(struct afs_fs_cursor *); | |
743 | extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, | |
744 | struct afs_addr_cursor *, struct key *); | |
745 | extern int afs_fs_get_capabilities(struct afs_net *, struct afs_server *, | |
746 | struct afs_addr_cursor *, struct key *); | |
5cf9dd55 DH |
747 | extern int afs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *, |
748 | struct afs_fid *, struct afs_file_status *, | |
749 | struct afs_callback *, unsigned int, | |
750 | struct afs_volsync *); | |
751 | extern int afs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *, | |
752 | struct afs_fid *, struct afs_file_status *, | |
753 | struct afs_callback *, struct afs_volsync *); | |
08e0e7c8 | 754 | |
1da177e4 LT |
755 | /* |
756 | * inode.c | |
757 | */ | |
0c3a5ac2 | 758 | extern int afs_fetch_status(struct afs_vnode *, struct key *, bool); |
c435ee34 | 759 | extern int afs_iget5_test(struct inode *, void *); |
4d673da1 | 760 | extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); |
00d3b7a4 | 761 | extern struct inode *afs_iget(struct super_block *, struct key *, |
260a9803 | 762 | struct afs_fid *, struct afs_file_status *, |
d2ddc776 DH |
763 | struct afs_callback *, |
764 | struct afs_cb_interest *); | |
416351f2 | 765 | extern void afs_zap_data(struct afs_vnode *); |
260a9803 | 766 | extern int afs_validate(struct afs_vnode *, struct key *); |
a528d35e | 767 | extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); |
31143d5d | 768 | extern int afs_setattr(struct dentry *, struct iattr *); |
b57922d9 | 769 | extern void afs_evict_inode(struct inode *); |
bec5eb61 | 770 | extern int afs_drop_inode(struct inode *); |
1da177e4 LT |
771 | |
772 | /* | |
773 | * main.c | |
774 | */ | |
0ad53eee | 775 | extern struct workqueue_struct *afs_wq; |
f044c884 DH |
776 | |
777 | static inline struct afs_net *afs_d2net(struct dentry *dentry) | |
778 | { | |
779 | return &__afs_net; | |
780 | } | |
781 | ||
782 | static inline struct afs_net *afs_i2net(struct inode *inode) | |
783 | { | |
784 | return &__afs_net; | |
785 | } | |
786 | ||
787 | static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) | |
788 | { | |
789 | return &__afs_net; | |
790 | } | |
791 | ||
792 | static inline struct afs_net *afs_sock2net(struct sock *sk) | |
793 | { | |
794 | return &__afs_net; | |
795 | } | |
796 | ||
797 | static inline struct afs_net *afs_get_net(struct afs_net *net) | |
798 | { | |
799 | return net; | |
800 | } | |
801 | ||
802 | static inline void afs_put_net(struct afs_net *net) | |
803 | { | |
804 | } | |
1da177e4 | 805 | |
d55b4da4 DH |
806 | static inline void __afs_stat(atomic_t *s) |
807 | { | |
808 | atomic_inc(s); | |
809 | } | |
810 | ||
811 | #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) | |
812 | ||
08e0e7c8 DH |
813 | /* |
814 | * misc.c | |
815 | */ | |
816 | extern int afs_abort_to_error(u32); | |
817 | ||
1da177e4 LT |
818 | /* |
819 | * mntpt.c | |
820 | */ | |
754661f1 | 821 | extern const struct inode_operations afs_mntpt_inode_operations; |
bec5eb61 | 822 | extern const struct inode_operations afs_autocell_inode_operations; |
4b6f5d20 | 823 | extern const struct file_operations afs_mntpt_file_operations; |
1da177e4 | 824 | |
d18610b0 | 825 | extern struct vfsmount *afs_d_automount(struct path *); |
08e0e7c8 | 826 | extern void afs_mntpt_kill_timer(void); |
1da177e4 | 827 | |
b4db2b35 AB |
828 | /* |
829 | * netdevices.c | |
830 | */ | |
831 | extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); | |
832 | ||
1da177e4 LT |
833 | /* |
834 | * proc.c | |
835 | */ | |
f044c884 DH |
836 | extern int __net_init afs_proc_init(struct afs_net *); |
837 | extern void __net_exit afs_proc_cleanup(struct afs_net *); | |
838 | extern int afs_proc_cell_setup(struct afs_net *, struct afs_cell *); | |
839 | extern void afs_proc_cell_remove(struct afs_net *, struct afs_cell *); | |
6f8880d8 | 840 | extern void afs_put_sysnames(struct afs_sysnames *); |
1da177e4 | 841 | |
d2ddc776 DH |
842 | /* |
843 | * rotate.c | |
844 | */ | |
845 | extern bool afs_begin_vnode_operation(struct afs_fs_cursor *, struct afs_vnode *, | |
846 | struct key *); | |
847 | extern bool afs_select_fileserver(struct afs_fs_cursor *); | |
848 | extern bool afs_select_current_fileserver(struct afs_fs_cursor *); | |
849 | extern int afs_end_vnode_operation(struct afs_fs_cursor *); | |
850 | ||
08e0e7c8 DH |
851 | /* |
852 | * rxrpc.c | |
853 | */ | |
f044c884 | 854 | extern struct workqueue_struct *afs_async_calls; |
8324f0bc | 855 | |
f044c884 DH |
856 | extern int __net_init afs_open_socket(struct afs_net *); |
857 | extern void __net_exit afs_close_socket(struct afs_net *); | |
858 | extern void afs_charge_preallocation(struct work_struct *); | |
341f741f DH |
859 | extern void afs_put_call(struct afs_call *); |
860 | extern int afs_queue_call_work(struct afs_call *); | |
8b2a464c | 861 | extern long afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t, bool); |
f044c884 DH |
862 | extern struct afs_call *afs_alloc_flat_call(struct afs_net *, |
863 | const struct afs_call_type *, | |
08e0e7c8 DH |
864 | size_t, size_t); |
865 | extern void afs_flat_call_destructor(struct afs_call *); | |
08e0e7c8 | 866 | extern void afs_send_empty_reply(struct afs_call *); |
b908fe6b | 867 | extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); |
d001648e | 868 | extern int afs_extract_data(struct afs_call *, void *, size_t, bool); |
08e0e7c8 | 869 | |
d001648e | 870 | static inline int afs_transfer_reply(struct afs_call *call) |
372ee163 | 871 | { |
d001648e | 872 | return afs_extract_data(call, call->buffer, call->reply_max, false); |
372ee163 DH |
873 | } |
874 | ||
98bf40cd DH |
875 | static inline bool afs_check_call_state(struct afs_call *call, |
876 | enum afs_call_state state) | |
877 | { | |
878 | return READ_ONCE(call->state) == state; | |
879 | } | |
880 | ||
881 | static inline bool afs_set_call_state(struct afs_call *call, | |
882 | enum afs_call_state from, | |
883 | enum afs_call_state to) | |
884 | { | |
885 | bool ok = false; | |
886 | ||
887 | spin_lock_bh(&call->state_lock); | |
888 | if (call->state == from) { | |
889 | call->state = to; | |
890 | trace_afs_call_state(call, from, to, 0, 0); | |
891 | ok = true; | |
892 | } | |
893 | spin_unlock_bh(&call->state_lock); | |
894 | return ok; | |
895 | } | |
896 | ||
897 | static inline void afs_set_call_complete(struct afs_call *call, | |
898 | int error, u32 remote_abort) | |
899 | { | |
900 | enum afs_call_state state; | |
901 | bool ok = false; | |
902 | ||
903 | spin_lock_bh(&call->state_lock); | |
904 | state = call->state; | |
905 | if (state != AFS_CALL_COMPLETE) { | |
906 | call->abort_code = remote_abort; | |
907 | call->error = error; | |
908 | call->state = AFS_CALL_COMPLETE; | |
909 | trace_afs_call_state(call, state, AFS_CALL_COMPLETE, | |
910 | error, remote_abort); | |
911 | ok = true; | |
912 | } | |
913 | spin_unlock_bh(&call->state_lock); | |
914 | if (ok) | |
915 | trace_afs_call_done(call); | |
916 | } | |
917 | ||
00d3b7a4 DH |
918 | /* |
919 | * security.c | |
920 | */ | |
be080a6f | 921 | extern void afs_put_permits(struct afs_permits *); |
00d3b7a4 | 922 | extern void afs_clear_permits(struct afs_vnode *); |
be080a6f | 923 | extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int); |
416351f2 | 924 | extern void afs_zap_permits(struct rcu_head *); |
00d3b7a4 | 925 | extern struct key *afs_request_key(struct afs_cell *); |
0fafdc9f | 926 | extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); |
10556cb2 | 927 | extern int afs_permission(struct inode *, int); |
be080a6f | 928 | extern void __exit afs_clean_up_permit_cache(void); |
00d3b7a4 | 929 | |
08e0e7c8 DH |
930 | /* |
931 | * server.c | |
932 | */ | |
933 | extern spinlock_t afs_server_peer_lock; | |
934 | ||
c435ee34 DH |
935 | static inline struct afs_server *afs_get_server(struct afs_server *server) |
936 | { | |
937 | atomic_inc(&server->usage); | |
938 | return server; | |
939 | } | |
08e0e7c8 | 940 | |
f044c884 DH |
941 | extern struct afs_server *afs_find_server(struct afs_net *, |
942 | const struct sockaddr_rxrpc *); | |
d2ddc776 DH |
943 | extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); |
944 | extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *); | |
9ed900b1 | 945 | extern void afs_put_server(struct afs_net *, struct afs_server *); |
d2ddc776 DH |
946 | extern void afs_manage_servers(struct work_struct *); |
947 | extern void afs_servers_timer(struct timer_list *); | |
f044c884 | 948 | extern void __net_exit afs_purge_servers(struct afs_net *); |
d2ddc776 DH |
949 | extern bool afs_probe_fileserver(struct afs_fs_cursor *); |
950 | extern bool afs_check_server_record(struct afs_fs_cursor *, struct afs_server *); | |
08e0e7c8 | 951 | |
00d3b7a4 | 952 | /* |
d2ddc776 | 953 | * server_list.c |
00d3b7a4 | 954 | */ |
d2ddc776 DH |
955 | static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) |
956 | { | |
957 | refcount_inc(&slist->usage); | |
958 | return slist; | |
959 | } | |
00d3b7a4 | 960 | |
d2ddc776 DH |
961 | extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); |
962 | extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, | |
963 | struct afs_vldb_entry *, | |
964 | u8); | |
965 | extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); | |
08e0e7c8 DH |
966 | |
967 | /* | |
d2ddc776 | 968 | * super.c |
08e0e7c8 | 969 | */ |
d2ddc776 DH |
970 | extern int __init afs_fs_init(void); |
971 | extern void __exit afs_fs_exit(void); | |
08e0e7c8 DH |
972 | |
973 | /* | |
d2ddc776 | 974 | * vlclient.c |
08e0e7c8 | 975 | */ |
d2ddc776 DH |
976 | extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_net *, |
977 | struct afs_addr_cursor *, | |
978 | struct key *, const char *, int); | |
979 | extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_net *, struct afs_addr_cursor *, | |
980 | struct key *, const uuid_t *); | |
bf99a53c DH |
981 | extern int afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, struct key *); |
982 | extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_net *, struct afs_addr_cursor *, | |
983 | struct key *, const uuid_t *); | |
08e0e7c8 DH |
984 | |
985 | /* | |
986 | * volume.c | |
987 | */ | |
d2ddc776 | 988 | static inline struct afs_volume *__afs_get_volume(struct afs_volume *volume) |
49566f6f DH |
989 | { |
990 | if (volume) | |
991 | atomic_inc(&volume->usage); | |
992 | return volume; | |
993 | } | |
08e0e7c8 | 994 | |
d2ddc776 DH |
995 | extern struct afs_volume *afs_create_volume(struct afs_mount_params *); |
996 | extern void afs_activate_volume(struct afs_volume *); | |
997 | extern void afs_deactivate_volume(struct afs_volume *); | |
9ed900b1 | 998 | extern void afs_put_volume(struct afs_cell *, struct afs_volume *); |
d2ddc776 | 999 | extern int afs_check_volume_status(struct afs_volume *, struct key *); |
08e0e7c8 | 1000 | |
31143d5d DH |
1001 | /* |
1002 | * write.c | |
1003 | */ | |
1004 | extern int afs_set_page_dirty(struct page *); | |
15b4650e NP |
1005 | extern int afs_write_begin(struct file *file, struct address_space *mapping, |
1006 | loff_t pos, unsigned len, unsigned flags, | |
1007 | struct page **pagep, void **fsdata); | |
1008 | extern int afs_write_end(struct file *file, struct address_space *mapping, | |
1009 | loff_t pos, unsigned len, unsigned copied, | |
1010 | struct page *page, void *fsdata); | |
31143d5d DH |
1011 | extern int afs_writepage(struct page *, struct writeback_control *); |
1012 | extern int afs_writepages(struct address_space *, struct writeback_control *); | |
31143d5d | 1013 | extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); |
50b5551d | 1014 | extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); |
58fed94d | 1015 | extern int afs_flush(struct file *, fl_owner_t); |
02c24a82 | 1016 | extern int afs_fsync(struct file *, loff_t, loff_t, int); |
1cf7a151 | 1017 | extern int afs_page_mkwrite(struct vm_fault *); |
4343d008 DH |
1018 | extern void afs_prune_wb_keys(struct afs_vnode *); |
1019 | extern int afs_launder_page(struct page *); | |
31143d5d | 1020 | |
d3e3b7ea DH |
1021 | /* |
1022 | * xattr.c | |
1023 | */ | |
1024 | extern const struct xattr_handler *afs_xattr_handlers[]; | |
1025 | extern ssize_t afs_listxattr(struct dentry *, char *, size_t); | |
31143d5d | 1026 | |
d2ddc776 DH |
1027 | |
1028 | /* | |
1029 | * Miscellaneous inline functions. | |
1030 | */ | |
1031 | static inline struct afs_vnode *AFS_FS_I(struct inode *inode) | |
1032 | { | |
1033 | return container_of(inode, struct afs_vnode, vfs_inode); | |
1034 | } | |
1035 | ||
1036 | static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) | |
1037 | { | |
1038 | return &vnode->vfs_inode; | |
1039 | } | |
1040 | ||
1041 | static inline void afs_vnode_commit_status(struct afs_fs_cursor *fc, | |
1042 | struct afs_vnode *vnode, | |
1043 | unsigned int cb_break) | |
1044 | { | |
1045 | if (fc->ac.error == 0) | |
1046 | afs_cache_permit(vnode, fc->key, cb_break); | |
1047 | } | |
1048 | ||
1049 | static inline void afs_check_for_remote_deletion(struct afs_fs_cursor *fc, | |
1050 | struct afs_vnode *vnode) | |
1051 | { | |
1052 | if (fc->ac.error == -ENOENT) { | |
1053 | set_bit(AFS_VNODE_DELETED, &vnode->flags); | |
1054 | afs_break_callback(vnode); | |
1055 | } | |
1056 | } | |
1057 | ||
1058 | ||
08e0e7c8 DH |
1059 | /*****************************************************************************/ |
1060 | /* | |
1061 | * debug tracing | |
1062 | */ | |
1063 | extern unsigned afs_debug; | |
1064 | ||
1065 | #define dbgprintk(FMT,...) \ | |
ad16df84 | 1066 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
08e0e7c8 | 1067 | |
530b6412 HH |
1068 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1069 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
08e0e7c8 DH |
1070 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
1071 | ||
1072 | ||
1073 | #if defined(__KDEBUG) | |
1074 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
1075 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
1076 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
1077 | ||
1078 | #elif defined(CONFIG_AFS_DEBUG) | |
1079 | #define AFS_DEBUG_KENTER 0x01 | |
1080 | #define AFS_DEBUG_KLEAVE 0x02 | |
1081 | #define AFS_DEBUG_KDEBUG 0x04 | |
1082 | ||
1083 | #define _enter(FMT,...) \ | |
1084 | do { \ | |
1085 | if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ | |
1086 | kenter(FMT,##__VA_ARGS__); \ | |
1087 | } while (0) | |
1088 | ||
1089 | #define _leave(FMT,...) \ | |
1090 | do { \ | |
1091 | if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ | |
1092 | kleave(FMT,##__VA_ARGS__); \ | |
1093 | } while (0) | |
1094 | ||
1095 | #define _debug(FMT,...) \ | |
1096 | do { \ | |
1097 | if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ | |
1098 | kdebug(FMT,##__VA_ARGS__); \ | |
1099 | } while (0) | |
1100 | ||
1101 | #else | |
12fdff3f DH |
1102 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1103 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
1104 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
08e0e7c8 DH |
1105 | #endif |
1106 | ||
1107 | /* | |
1108 | * debug assertion checking | |
1109 | */ | |
1110 | #if 1 // defined(__KDEBUGALL) | |
1111 | ||
1112 | #define ASSERT(X) \ | |
1113 | do { \ | |
1114 | if (unlikely(!(X))) { \ | |
1115 | printk(KERN_ERR "\n"); \ | |
1116 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1117 | BUG(); \ | |
1118 | } \ | |
1119 | } while(0) | |
1120 | ||
1121 | #define ASSERTCMP(X, OP, Y) \ | |
1122 | do { \ | |
1123 | if (unlikely(!((X) OP (Y)))) { \ | |
1124 | printk(KERN_ERR "\n"); \ | |
1125 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1126 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
1127 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1128 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
1129 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1130 | BUG(); \ | |
1131 | } \ | |
1132 | } while(0) | |
1133 | ||
416351f2 DH |
1134 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
1135 | do { \ | |
1136 | if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ | |
1137 | printk(KERN_ERR "\n"); \ | |
1138 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1139 | printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ | |
1140 | (unsigned long)(L), (unsigned long)(N), \ | |
1141 | (unsigned long)(H)); \ | |
1142 | printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ | |
1143 | (unsigned long)(L), (unsigned long)(N), \ | |
1144 | (unsigned long)(H)); \ | |
1145 | BUG(); \ | |
1146 | } \ | |
1147 | } while(0) | |
1148 | ||
08e0e7c8 DH |
1149 | #define ASSERTIF(C, X) \ |
1150 | do { \ | |
1151 | if (unlikely((C) && !(X))) { \ | |
1152 | printk(KERN_ERR "\n"); \ | |
1153 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1154 | BUG(); \ | |
1155 | } \ | |
1156 | } while(0) | |
1157 | ||
1158 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1159 | do { \ | |
1160 | if (unlikely((C) && !((X) OP (Y)))) { \ | |
1161 | printk(KERN_ERR "\n"); \ | |
1162 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1163 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
1164 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1165 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
1166 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1167 | BUG(); \ | |
1168 | } \ | |
1169 | } while(0) | |
1170 | ||
1171 | #else | |
1172 | ||
1173 | #define ASSERT(X) \ | |
1174 | do { \ | |
1175 | } while(0) | |
1176 | ||
1177 | #define ASSERTCMP(X, OP, Y) \ | |
1178 | do { \ | |
1179 | } while(0) | |
1180 | ||
416351f2 DH |
1181 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
1182 | do { \ | |
1183 | } while(0) | |
1184 | ||
08e0e7c8 DH |
1185 | #define ASSERTIF(C, X) \ |
1186 | do { \ | |
1187 | } while(0) | |
1188 | ||
1189 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1190 | do { \ | |
1191 | } while(0) | |
1192 | ||
1193 | #endif /* __KDEBUGALL */ |