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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> |
0722f186 | 24 | #include <linux/mm_types.h> |
0a5143f2 | 25 | #include <linux/dns_resolver.h> |
f044c884 | 26 | #include <net/net_namespace.h> |
5b86d4ff DH |
27 | #include <net/netns/generic.h> |
28 | #include <net/sock.h> | |
8324f0bc | 29 | #include <net/af_rxrpc.h> |
00c541ea | 30 | |
08e0e7c8 DH |
31 | #include "afs.h" |
32 | #include "afs_vl.h" | |
33 | ||
34 | #define AFS_CELL_MAX_ADDRS 15 | |
35 | ||
31143d5d | 36 | struct pagevec; |
08e0e7c8 DH |
37 | struct afs_call; |
38 | ||
13fcc683 | 39 | struct afs_fs_context { |
00d3b7a4 | 40 | bool force; /* T to force cell type */ |
bec5eb61 | 41 | bool autocell; /* T if set auto mount operation */ |
4d673da1 | 42 | bool dyn_root; /* T if dynamic root */ |
13fcc683 | 43 | bool no_cell; /* T if the source is "none" (for dynroot) */ |
00d3b7a4 | 44 | afs_voltype_t type; /* type of volume requested */ |
13fcc683 | 45 | unsigned int volnamesz; /* size of volume name */ |
00d3b7a4 | 46 | const char *volname; /* name of volume to mount */ |
5b86d4ff | 47 | struct afs_net *net; /* the AFS net namespace stuff */ |
00d3b7a4 DH |
48 | struct afs_cell *cell; /* cell in which to find volume */ |
49 | struct afs_volume *volume; /* volume record */ | |
50 | struct key *key; /* key to use for secure mounting */ | |
51 | }; | |
52 | ||
c435ee34 DH |
53 | struct afs_iget_data { |
54 | struct afs_fid fid; | |
55 | struct afs_volume *volume; /* volume on which resides */ | |
56 | }; | |
57 | ||
8e8d7f13 | 58 | enum afs_call_state { |
98bf40cd DH |
59 | AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ |
60 | AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ | |
61 | AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ | |
62 | AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ | |
63 | AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ | |
64 | AFS_CALL_SV_REPLYING, /* Server: Replying */ | |
65 | AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ | |
66 | AFS_CALL_COMPLETE, /* Completed or failed */ | |
8e8d7f13 | 67 | }; |
f044c884 | 68 | |
8b2a464c DH |
69 | /* |
70 | * List of server addresses. | |
71 | */ | |
72 | struct afs_addr_list { | |
73 | struct rcu_head rcu; /* Must be first */ | |
74 | refcount_t usage; | |
d2ddc776 | 75 | u32 version; /* Version */ |
68eb64c3 DH |
76 | unsigned char max_addrs; |
77 | unsigned char nr_addrs; | |
3bf0fb6f | 78 | unsigned char preferred; /* Preferred address */ |
68eb64c3 | 79 | unsigned char nr_ipv4; /* Number of IPv4 addresses */ |
0a5143f2 DH |
80 | enum dns_record_source source:8; |
81 | enum dns_lookup_status status:8; | |
bf99a53c | 82 | unsigned long probed; /* Mask of servers that have been probed */ |
3bf0fb6f DH |
83 | unsigned long failed; /* Mask of addrs that failed locally/ICMP */ |
84 | unsigned long responded; /* Mask of addrs that responded */ | |
8b2a464c | 85 | struct sockaddr_rxrpc addrs[]; |
68eb64c3 | 86 | #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8)) |
8b2a464c DH |
87 | }; |
88 | ||
08e0e7c8 DH |
89 | /* |
90 | * a record of an in-progress RxRPC call | |
91 | */ | |
92 | struct afs_call { | |
93 | const struct afs_call_type *type; /* type of call */ | |
3bf0fb6f | 94 | struct afs_addr_list *alist; /* Address is alist[addr_ix] */ |
08e0e7c8 | 95 | wait_queue_head_t waitq; /* processes awaiting completion */ |
341f741f | 96 | struct work_struct async_work; /* async I/O processor */ |
08e0e7c8 | 97 | struct work_struct work; /* actual work processor */ |
08e0e7c8 DH |
98 | struct rxrpc_call *rxcall; /* RxRPC call handle */ |
99 | struct key *key; /* security for this call */ | |
f044c884 | 100 | struct afs_net *net; /* The network namespace */ |
d0676a16 | 101 | struct afs_server *cm_server; /* Server affected by incoming CM call */ |
d2ddc776 | 102 | struct afs_cb_interest *cbi; /* Callback interest for server used */ |
08e0e7c8 | 103 | void *request; /* request data (first part) */ |
4343d008 | 104 | struct address_space *mapping; /* Pages being written from */ |
12bdcf33 DH |
105 | struct iov_iter iter; /* Buffer iterator */ |
106 | struct iov_iter *_iter; /* Iterator currently in use */ | |
107 | union { /* Convenience for ->iter */ | |
108 | struct kvec kvec[1]; | |
109 | struct bio_vec bvec[1]; | |
110 | }; | |
08e0e7c8 | 111 | void *buffer; /* reply receive buffer */ |
97e3043a | 112 | void *reply[4]; /* Where to put the reply */ |
31143d5d DH |
113 | pgoff_t first; /* first page in mapping to deal with */ |
114 | pgoff_t last; /* last page in mapping to deal with */ | |
341f741f | 115 | atomic_t usage; |
8e8d7f13 | 116 | enum afs_call_state state; |
98bf40cd | 117 | spinlock_t state_lock; |
08e0e7c8 | 118 | int error; /* error code */ |
d001648e | 119 | u32 abort_code; /* Remote abort ID or 0 */ |
3bf0fb6f | 120 | u32 epoch; |
08e0e7c8 DH |
121 | unsigned request_size; /* size of request data */ |
122 | unsigned reply_max; /* maximum size of reply */ | |
31143d5d | 123 | unsigned first_offset; /* offset into mapping[first] */ |
c435ee34 | 124 | unsigned int cb_break; /* cb_break + cb_s_break before the call */ |
bcd89270 MD |
125 | union { |
126 | unsigned last_to; /* amount of mapping[last] */ | |
127 | unsigned count2; /* count used in unmarshalling */ | |
128 | }; | |
08e0e7c8 | 129 | unsigned char unmarshall; /* unmarshalling phase */ |
3bf0fb6f | 130 | unsigned char addr_ix; /* Address in ->alist */ |
08e0e7c8 | 131 | bool incoming; /* T if incoming call */ |
31143d5d | 132 | bool send_pages; /* T if data from mapping should be sent */ |
d001648e | 133 | bool need_attention; /* T if RxRPC poked us */ |
56ff9c83 | 134 | bool async; /* T if asynchronous */ |
33cd7f2b | 135 | bool ret_reply0; /* T if should return reply[0] on success */ |
a68f4a27 | 136 | bool upgrade; /* T to request service upgrade */ |
3bf0fb6f | 137 | bool want_reply_time; /* T if want reply_time */ |
bf99a53c | 138 | u16 service_id; /* Actual service ID (after upgrade) */ |
a25e21f0 | 139 | unsigned int debug_id; /* Trace ID */ |
50a2c953 | 140 | u32 operation_ID; /* operation ID for an incoming call */ |
08e0e7c8 | 141 | u32 count; /* count for use in unmarshalling */ |
12bdcf33 DH |
142 | union { /* place to extract temporary data */ |
143 | struct { | |
144 | __be32 tmp_u; | |
145 | __be32 tmp; | |
146 | } __attribute__((packed)); | |
147 | __be64 tmp64; | |
148 | }; | |
0c3a5ac2 DH |
149 | afs_dataversion_t expected_version; /* Updated version expected from store */ |
150 | afs_dataversion_t expected_version_2; /* 2nd updated version expected from store */ | |
12d8e95a | 151 | ktime_t reply_time; /* Time of first reply packet */ |
08e0e7c8 DH |
152 | }; |
153 | ||
154 | struct afs_call_type { | |
00d3b7a4 | 155 | const char *name; |
025db80c | 156 | unsigned int op; /* Really enum afs_fs_operation */ |
00d3b7a4 | 157 | |
08e0e7c8 DH |
158 | /* deliver request or reply data to an call |
159 | * - returning an error will cause the call to be aborted | |
160 | */ | |
d001648e | 161 | int (*deliver)(struct afs_call *call); |
08e0e7c8 | 162 | |
08e0e7c8 DH |
163 | /* clean up a call */ |
164 | void (*destructor)(struct afs_call *call); | |
341f741f DH |
165 | |
166 | /* Work function */ | |
167 | void (*work)(struct work_struct *work); | |
3bf0fb6f DH |
168 | |
169 | /* Call done function (gets called immediately on success or failure) */ | |
170 | void (*done)(struct afs_call *call); | |
08e0e7c8 DH |
171 | }; |
172 | ||
4343d008 DH |
173 | /* |
174 | * Key available for writeback on a file. | |
175 | */ | |
176 | struct afs_wb_key { | |
177 | refcount_t usage; | |
178 | struct key *key; | |
179 | struct list_head vnode_link; /* Link in vnode->wb_keys */ | |
180 | }; | |
181 | ||
215804a9 DH |
182 | /* |
183 | * AFS open file information record. Pointed to by file->private_data. | |
184 | */ | |
185 | struct afs_file { | |
186 | struct key *key; /* The key this file was opened with */ | |
4343d008 | 187 | struct afs_wb_key *wb; /* Writeback key record for this file */ |
215804a9 DH |
188 | }; |
189 | ||
190 | static inline struct key *afs_file_key(struct file *file) | |
191 | { | |
192 | struct afs_file *af = file->private_data; | |
193 | ||
194 | return af->key; | |
195 | } | |
196 | ||
196ee9cd DH |
197 | /* |
198 | * Record of an outstanding read operation on a vnode. | |
199 | */ | |
200 | struct afs_read { | |
201 | loff_t pos; /* Where to start reading */ | |
e8e581a8 | 202 | loff_t len; /* How much we're asking for */ |
196ee9cd | 203 | loff_t actual_len; /* How much we're actually getting */ |
6a0e3999 | 204 | loff_t remain; /* Amount remaining */ |
f3ddee8d DH |
205 | loff_t file_size; /* File size returned by server */ |
206 | afs_dataversion_t data_version; /* Version number returned by server */ | |
207 | refcount_t usage; | |
196ee9cd | 208 | unsigned int index; /* Which page we're reading into */ |
196ee9cd | 209 | unsigned int nr_pages; |
12bdcf33 | 210 | unsigned int offset; /* offset into current page */ |
196ee9cd | 211 | void (*page_done)(struct afs_call *, struct afs_read *); |
f3ddee8d DH |
212 | struct page **pages; |
213 | struct page *array[]; | |
196ee9cd DH |
214 | }; |
215 | ||
08e0e7c8 DH |
216 | /* |
217 | * AFS superblock private data | |
218 | * - there's one superblock per volume | |
219 | */ | |
220 | struct afs_super_info { | |
5b86d4ff | 221 | struct net *net_ns; /* Network namespace */ |
49566f6f | 222 | struct afs_cell *cell; /* The cell in which the volume resides */ |
08e0e7c8 | 223 | struct afs_volume *volume; /* volume record */ |
4d673da1 | 224 | bool dyn_root; /* True if dynamic root */ |
08e0e7c8 | 225 | }; |
1da177e4 | 226 | |
08e0e7c8 DH |
227 | static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
228 | { | |
229 | return sb->s_fs_info; | |
1da177e4 LT |
230 | } |
231 | ||
08e0e7c8 DH |
232 | extern struct file_system_type afs_fs_type; |
233 | ||
6f8880d8 DH |
234 | /* |
235 | * Set of substitutes for @sys. | |
236 | */ | |
237 | struct afs_sysnames { | |
238 | #define AFS_NR_SYSNAME 16 | |
239 | char *subs[AFS_NR_SYSNAME]; | |
240 | refcount_t usage; | |
241 | unsigned short nr; | |
6f8880d8 DH |
242 | char blank[1]; |
243 | }; | |
244 | ||
f044c884 DH |
245 | /* |
246 | * AFS network namespace record. | |
247 | */ | |
248 | struct afs_net { | |
5b86d4ff | 249 | struct net *net; /* Backpointer to the owning net namespace */ |
f044c884 DH |
250 | struct afs_uuid uuid; |
251 | bool live; /* F if this namespace is being removed */ | |
252 | ||
253 | /* AF_RXRPC I/O stuff */ | |
254 | struct socket *socket; | |
255 | struct afs_call *spare_incoming_call; | |
256 | struct work_struct charge_preallocation_work; | |
257 | struct mutex socket_mutex; | |
258 | atomic_t nr_outstanding_calls; | |
259 | atomic_t nr_superblocks; | |
260 | ||
261 | /* Cell database */ | |
989782dc | 262 | struct rb_root cells; |
1588def9 | 263 | struct afs_cell __rcu *ws_cell; |
989782dc DH |
264 | struct work_struct cells_manager; |
265 | struct timer_list cells_timer; | |
266 | atomic_t cells_outstanding; | |
267 | seqlock_t cells_lock; | |
f044c884 | 268 | |
0da0b7fd | 269 | struct mutex proc_cells_lock; |
6b3944e4 | 270 | struct hlist_head proc_cells; |
f044c884 | 271 | |
d2ddc776 DH |
272 | /* Known servers. Theoretically each fileserver can only be in one |
273 | * cell, but in practice, people create aliases and subsets and there's | |
274 | * no easy way to distinguish them. | |
275 | */ | |
276 | seqlock_t fs_lock; /* For fs_servers */ | |
277 | struct rb_root fs_servers; /* afs_server (by server UUID or address) */ | |
278 | struct list_head fs_updates; /* afs_server (by update_at) */ | |
279 | struct hlist_head fs_proc; /* procfs servers list */ | |
f044c884 | 280 | |
d2ddc776 DH |
281 | struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ |
282 | struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */ | |
283 | seqlock_t fs_addr_lock; /* For fs_addresses[46] */ | |
f044c884 | 284 | |
d2ddc776 DH |
285 | struct work_struct fs_manager; |
286 | struct timer_list fs_timer; | |
59fa1c4a | 287 | atomic_t servers_outstanding; |
f044c884 | 288 | |
d2ddc776 DH |
289 | /* File locking renewal management */ |
290 | struct mutex lock_manager_mutex; | |
291 | ||
f044c884 | 292 | /* Misc */ |
0da0b7fd | 293 | struct super_block *dynroot_sb; /* Dynamic root mount superblock */ |
d55b4da4 | 294 | struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ |
6f8880d8 DH |
295 | struct afs_sysnames *sysnames; |
296 | rwlock_t sysnames_lock; | |
d55b4da4 DH |
297 | |
298 | /* Statistics counters */ | |
299 | atomic_t n_lookup; /* Number of lookups done */ | |
300 | atomic_t n_reval; /* Number of dentries needing revalidation */ | |
301 | atomic_t n_inval; /* Number of invalidations by the server */ | |
f3ddee8d | 302 | atomic_t n_relpg; /* Number of invalidations by releasepage */ |
d55b4da4 | 303 | atomic_t n_read_dir; /* Number of directory pages read */ |
63a4681f DH |
304 | atomic_t n_dir_cr; /* Number of directory entry creation edits */ |
305 | atomic_t n_dir_rm; /* Number of directory entry removal edits */ | |
76a5cb6f DH |
306 | atomic_t n_stores; /* Number of store ops */ |
307 | atomic_long_t n_store_bytes; /* Number of bytes stored */ | |
308 | atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ | |
309 | atomic_t n_fetches; /* Number of data fetch ops */ | |
f044c884 DH |
310 | }; |
311 | ||
6f8880d8 | 312 | extern const char afs_init_sysname[]; |
f044c884 | 313 | |
989782dc DH |
314 | enum afs_cell_state { |
315 | AFS_CELL_UNSET, | |
316 | AFS_CELL_ACTIVATING, | |
317 | AFS_CELL_ACTIVE, | |
318 | AFS_CELL_DEACTIVATING, | |
319 | AFS_CELL_INACTIVE, | |
320 | AFS_CELL_FAILED, | |
321 | }; | |
322 | ||
08e0e7c8 | 323 | /* |
d2ddc776 DH |
324 | * AFS cell record. |
325 | * | |
326 | * This is a tricky concept to get right as it is possible to create aliases | |
327 | * simply by pointing AFSDB/SRV records for two names at the same set of VL | |
328 | * servers; it is also possible to do things like setting up two sets of VL | |
329 | * servers, one of which provides a superset of the volumes provided by the | |
330 | * other (for internal/external division, for example). | |
331 | * | |
332 | * Cells only exist in the sense that (a) a cell's name maps to a set of VL | |
333 | * servers and (b) a cell's name is used by the client to select the key to use | |
334 | * for authentication and encryption. The cell name is not typically used in | |
335 | * the protocol. | |
336 | * | |
337 | * There is no easy way to determine if two cells are aliases or one is a | |
338 | * subset of another. | |
08e0e7c8 DH |
339 | */ |
340 | struct afs_cell { | |
989782dc DH |
341 | union { |
342 | struct rcu_head rcu; | |
343 | struct rb_node net_node; /* Node in net->cells */ | |
344 | }; | |
345 | struct afs_net *net; | |
00d3b7a4 | 346 | struct key *anonymous_key; /* anonymous user key for this cell */ |
989782dc | 347 | struct work_struct manager; /* Manager for init/deinit/dns */ |
6b3944e4 | 348 | struct hlist_node proc_link; /* /proc cell list link */ |
9b3f26c9 DH |
349 | #ifdef CONFIG_AFS_FSCACHE |
350 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 351 | #endif |
989782dc DH |
352 | time64_t dns_expiry; /* Time AFSDB/SRV record expires */ |
353 | time64_t last_inactive; /* Time of last drop of usage count */ | |
354 | atomic_t usage; | |
355 | unsigned long flags; | |
356 | #define AFS_CELL_FL_NOT_READY 0 /* The cell record is not ready for use */ | |
357 | #define AFS_CELL_FL_NO_GC 1 /* The cell was added manually, don't auto-gc */ | |
358 | #define AFS_CELL_FL_NOT_FOUND 2 /* Permanent DNS error */ | |
359 | #define AFS_CELL_FL_DNS_FAIL 3 /* Failed to access DNS */ | |
8b2a464c | 360 | #define AFS_CELL_FL_NO_LOOKUP_YET 4 /* Not completed first DNS lookup yet */ |
989782dc DH |
361 | enum afs_cell_state state; |
362 | short error; | |
363 | ||
d2ddc776 DH |
364 | /* Active fileserver interaction state. */ |
365 | struct list_head proc_volumes; /* procfs volume list */ | |
366 | rwlock_t proc_lock; | |
989782dc | 367 | |
d2ddc776 | 368 | /* VL server list. */ |
0a5143f2 DH |
369 | rwlock_t vl_servers_lock; /* Lock on vl_servers */ |
370 | struct afs_vlserver_list __rcu *vl_servers; | |
371 | ||
989782dc DH |
372 | u8 name_len; /* Length of name */ |
373 | char name[64 + 1]; /* Cell name, case-flattened and NUL-padded */ | |
08e0e7c8 DH |
374 | }; |
375 | ||
0a5143f2 DH |
376 | /* |
377 | * Volume Location server record. | |
378 | */ | |
379 | struct afs_vlserver { | |
380 | struct rcu_head rcu; | |
381 | struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */ | |
382 | unsigned long flags; | |
383 | #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ | |
384 | #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ | |
3bf0fb6f | 385 | #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ |
0a5143f2 DH |
386 | rwlock_t lock; /* Lock on addresses */ |
387 | atomic_t usage; | |
3bf0fb6f DH |
388 | |
389 | /* Probe state */ | |
390 | wait_queue_head_t probe_wq; | |
391 | atomic_t probe_outstanding; | |
392 | spinlock_t probe_lock; | |
393 | struct { | |
394 | unsigned int rtt; /* RTT as ktime/64 */ | |
395 | u32 abort_code; | |
396 | short error; | |
397 | bool have_result; | |
398 | bool responded:1; | |
399 | bool is_yfs:1; | |
400 | bool not_yfs:1; | |
401 | bool local_failure:1; | |
402 | } probe; | |
403 | ||
0a5143f2 | 404 | u16 port; |
3bf0fb6f | 405 | u16 name_len; /* Length of name */ |
0a5143f2 DH |
406 | char name[]; /* Server name, case-flattened */ |
407 | }; | |
408 | ||
409 | /* | |
410 | * Weighted list of Volume Location servers. | |
411 | */ | |
412 | struct afs_vlserver_entry { | |
413 | u16 priority; /* Preference (as SRV) */ | |
414 | u16 weight; /* Weight (as SRV) */ | |
415 | enum dns_record_source source:8; | |
416 | enum dns_lookup_status status:8; | |
417 | struct afs_vlserver *server; | |
418 | }; | |
419 | ||
420 | struct afs_vlserver_list { | |
421 | struct rcu_head rcu; | |
422 | atomic_t usage; | |
423 | u8 nr_servers; | |
424 | u8 index; /* Server currently in use */ | |
3bf0fb6f | 425 | u8 preferred; /* Preferred server */ |
0a5143f2 DH |
426 | enum dns_record_source source:8; |
427 | enum dns_lookup_status status:8; | |
428 | rwlock_t lock; | |
429 | struct afs_vlserver_entry servers[]; | |
430 | }; | |
431 | ||
08e0e7c8 | 432 | /* |
d2ddc776 DH |
433 | * Cached VLDB entry. |
434 | * | |
435 | * This is pointed to by cell->vldb_entries, indexed by name. | |
08e0e7c8 | 436 | */ |
d2ddc776 DH |
437 | struct afs_vldb_entry { |
438 | afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ | |
00d3b7a4 | 439 | |
d2ddc776 DH |
440 | unsigned long flags; |
441 | #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ | |
442 | #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ | |
443 | #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ | |
444 | #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ | |
445 | #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ | |
446 | ||
447 | uuid_t fs_server[AFS_NMAXNSERVERS]; | |
448 | u8 fs_mask[AFS_NMAXNSERVERS]; | |
08e0e7c8 DH |
449 | #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ |
450 | #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ | |
451 | #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ | |
d2ddc776 DH |
452 | short error; |
453 | u8 nr_servers; /* Number of server records */ | |
454 | u8 name_len; | |
455 | u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ | |
08e0e7c8 DH |
456 | }; |
457 | ||
458 | /* | |
d2ddc776 | 459 | * Record of fileserver with which we're actively communicating. |
08e0e7c8 DH |
460 | */ |
461 | struct afs_server { | |
d2ddc776 DH |
462 | struct rcu_head rcu; |
463 | union { | |
464 | uuid_t uuid; /* Server ID */ | |
465 | struct afs_uuid _uuid; | |
466 | }; | |
467 | ||
468 | struct afs_addr_list __rcu *addresses; | |
469 | struct rb_node uuid_rb; /* Link in net->servers */ | |
470 | struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ | |
471 | struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ | |
472 | struct hlist_node proc_link; /* Link in net->fs_proc */ | |
473 | struct afs_server *gc_next; /* Next server in manager's list */ | |
474 | time64_t put_time; /* Time at which last put */ | |
475 | time64_t update_at; /* Time at which to next update the record */ | |
c435ee34 | 476 | unsigned long flags; |
d2ddc776 DH |
477 | #define AFS_SERVER_FL_NOT_READY 1 /* The record is not ready for use */ |
478 | #define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */ | |
479 | #define AFS_SERVER_FL_VL_FAIL 3 /* Failed to access VL server */ | |
480 | #define AFS_SERVER_FL_UPDATING 4 | |
481 | #define AFS_SERVER_FL_PROBED 5 /* The fileserver has been probed */ | |
482 | #define AFS_SERVER_FL_PROBING 6 /* Fileserver is being probed */ | |
5cf9dd55 | 483 | #define AFS_SERVER_FL_NO_IBULK 7 /* Fileserver doesn't support FS.InlineBulkStatus */ |
f2686b09 | 484 | #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ |
30062bd1 DH |
485 | #define AFS_SERVER_FL_IS_YFS 9 /* Server is YFS not AFS */ |
486 | #define AFS_SERVER_FL_NO_RM2 10 /* Fileserver doesn't support YFS.RemoveFile2 */ | |
3bf0fb6f | 487 | #define AFS_SERVER_FL_HAVE_EPOCH 11 /* ->epoch is valid */ |
d2ddc776 DH |
488 | atomic_t usage; |
489 | u32 addr_version; /* Address list version */ | |
3bf0fb6f | 490 | u32 cm_epoch; /* Server RxRPC epoch */ |
08e0e7c8 DH |
491 | |
492 | /* file service access */ | |
d2ddc776 | 493 | rwlock_t fs_lock; /* access lock */ |
08e0e7c8 DH |
494 | |
495 | /* callback promise management */ | |
47ea0f2e | 496 | struct hlist_head cb_volumes; /* List of volume interests on this server */ |
c435ee34 DH |
497 | unsigned cb_s_break; /* Break-everything counter. */ |
498 | rwlock_t cb_break_lock; /* Volume finding lock */ | |
3bf0fb6f DH |
499 | |
500 | /* Probe state */ | |
501 | wait_queue_head_t probe_wq; | |
502 | atomic_t probe_outstanding; | |
503 | spinlock_t probe_lock; | |
504 | struct { | |
505 | unsigned int rtt; /* RTT as ktime/64 */ | |
506 | u32 abort_code; | |
507 | u32 cm_epoch; | |
508 | short error; | |
509 | bool have_result; | |
510 | bool responded:1; | |
511 | bool is_yfs:1; | |
512 | bool not_yfs:1; | |
513 | bool local_failure:1; | |
514 | bool no_epoch:1; | |
515 | bool cm_probed:1; | |
516 | bool said_rebooted:1; | |
517 | bool said_inconsistent:1; | |
518 | } probe; | |
c435ee34 DH |
519 | }; |
520 | ||
47ea0f2e DH |
521 | /* |
522 | * Volume collation in the server's callback interest list. | |
523 | */ | |
524 | struct afs_vol_interest { | |
525 | struct hlist_node srv_link; /* Link in server->cb_volumes */ | |
526 | struct hlist_head cb_interests; /* List of callback interests on the server */ | |
527 | afs_volid_t vid; /* Volume ID to match */ | |
528 | unsigned int usage; | |
529 | }; | |
530 | ||
c435ee34 DH |
531 | /* |
532 | * Interest by a superblock on a server. | |
533 | */ | |
534 | struct afs_cb_interest { | |
47ea0f2e DH |
535 | struct hlist_node cb_vlink; /* Link in vol_interest->cb_interests */ |
536 | struct afs_vol_interest *vol_interest; | |
c435ee34 DH |
537 | struct afs_server *server; /* Server on which this interest resides */ |
538 | struct super_block *sb; /* Superblock on which inodes reside */ | |
539 | afs_volid_t vid; /* Volume ID to match */ | |
540 | refcount_t usage; | |
08e0e7c8 DH |
541 | }; |
542 | ||
543 | /* | |
d2ddc776 DH |
544 | * Replaceable server list. |
545 | */ | |
546 | struct afs_server_entry { | |
547 | struct afs_server *server; | |
548 | struct afs_cb_interest *cb_interest; | |
549 | }; | |
550 | ||
551 | struct afs_server_list { | |
552 | refcount_t usage; | |
3bf0fb6f DH |
553 | unsigned char nr_servers; |
554 | unsigned char preferred; /* Preferred server */ | |
d2ddc776 DH |
555 | unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ |
556 | unsigned int seq; /* Set to ->servers_seq when installed */ | |
d4a96bec | 557 | rwlock_t lock; |
d2ddc776 DH |
558 | struct afs_server_entry servers[]; |
559 | }; | |
560 | ||
561 | /* | |
562 | * Live AFS volume management. | |
08e0e7c8 DH |
563 | */ |
564 | struct afs_volume { | |
d2ddc776 | 565 | afs_volid_t vid; /* volume ID */ |
08e0e7c8 | 566 | atomic_t usage; |
d2ddc776 DH |
567 | time64_t update_at; /* Time at which to next update */ |
568 | struct afs_cell *cell; /* Cell to which belongs (pins ref) */ | |
569 | struct list_head proc_link; /* Link in cell->vl_proc */ | |
570 | unsigned long flags; | |
571 | #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ | |
572 | #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ | |
573 | #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ | |
574 | #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ | |
575 | #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ | |
576 | #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ | |
9b3f26c9 DH |
577 | #ifdef CONFIG_AFS_FSCACHE |
578 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 579 | #endif |
d2ddc776 DH |
580 | struct afs_server_list *servers; /* List of servers on which volume resides */ |
581 | rwlock_t servers_lock; /* Lock for ->servers */ | |
582 | unsigned int servers_seq; /* Incremented each time ->servers changes */ | |
583 | ||
68251f0a DH |
584 | unsigned cb_v_break; /* Break-everything counter. */ |
585 | rwlock_t cb_break_lock; | |
586 | ||
08e0e7c8 | 587 | afs_voltype_t type; /* type of volume */ |
d2ddc776 | 588 | short error; |
08e0e7c8 | 589 | char type_force; /* force volume type (suppress R/O -> R/W) */ |
d2ddc776 DH |
590 | u8 name_len; |
591 | u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ | |
08e0e7c8 DH |
592 | }; |
593 | ||
0fafdc9f DH |
594 | enum afs_lock_state { |
595 | AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ | |
596 | AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ | |
597 | AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ | |
598 | AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ | |
599 | AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ | |
600 | AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ | |
601 | AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ | |
602 | }; | |
603 | ||
08e0e7c8 | 604 | /* |
f8de483e DH |
605 | * AFS inode private data. |
606 | * | |
607 | * Note that afs_alloc_inode() *must* reset anything that could incorrectly | |
608 | * leak from one inode to another. | |
08e0e7c8 DH |
609 | */ |
610 | struct afs_vnode { | |
611 | struct inode vfs_inode; /* the VFS's inode record */ | |
612 | ||
613 | struct afs_volume *volume; /* volume on which vnode resides */ | |
08e0e7c8 DH |
614 | struct afs_fid fid; /* the file identifier for this inode */ |
615 | struct afs_file_status status; /* AFS status info for this file */ | |
a4ff7401 | 616 | afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ |
9b3f26c9 DH |
617 | #ifdef CONFIG_AFS_FSCACHE |
618 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 619 | #endif |
fe342cf7 | 620 | struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ |
d2ddc776 | 621 | struct mutex io_lock; /* Lock for serialising I/O on this mutex */ |
b61f7dcf | 622 | struct rw_semaphore validate_lock; /* lock for validating this vnode */ |
4343d008 | 623 | spinlock_t wb_lock; /* lock for wb_keys */ |
08e0e7c8 DH |
624 | spinlock_t lock; /* waitqueue/flags lock */ |
625 | unsigned long flags; | |
c435ee34 | 626 | #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ |
260a9803 | 627 | #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
f3ddee8d | 628 | #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ |
08e0e7c8 DH |
629 | #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ |
630 | #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ | |
631 | #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ | |
0fafdc9f DH |
632 | #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ |
633 | #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ | |
5a813276 | 634 | #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ |
08e0e7c8 | 635 | |
4343d008 | 636 | struct list_head wb_keys; /* List of keys available for writeback */ |
e8d6c554 DH |
637 | struct list_head pending_locks; /* locks waiting to be granted */ |
638 | struct list_head granted_locks; /* locks granted on this file */ | |
639 | struct delayed_work lock_work; /* work to be done in locking */ | |
0fafdc9f DH |
640 | struct key *lock_key; /* Key to be used in lock ops */ |
641 | enum afs_lock_state lock_state : 8; | |
642 | afs_lock_type_t lock_type : 8; | |
31143d5d | 643 | |
08e0e7c8 | 644 | /* outstanding callback notification on this file */ |
c435ee34 DH |
645 | struct afs_cb_interest *cb_interest; /* Server on which this resides */ |
646 | unsigned int cb_s_break; /* Mass break counter on ->server */ | |
68251f0a | 647 | unsigned int cb_v_break; /* Mass break counter on ->volume */ |
c435ee34 DH |
648 | unsigned int cb_break; /* Break counter on vnode */ |
649 | seqlock_t cb_lock; /* Lock for ->cb_interest, ->status, ->cb_*break */ | |
650 | ||
651 | time64_t cb_expires_at; /* time at which callback expires */ | |
08e0e7c8 | 652 | unsigned cb_version; /* callback version */ |
08e0e7c8 | 653 | afs_callback_type_t cb_type; /* type of callback */ |
08e0e7c8 DH |
654 | }; |
655 | ||
12bdcf33 DH |
656 | static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) |
657 | { | |
658 | #ifdef CONFIG_AFS_FSCACHE | |
659 | return vnode->cache; | |
660 | #else | |
661 | return NULL; | |
662 | #endif | |
663 | } | |
664 | ||
00d3b7a4 DH |
665 | /* |
666 | * cached security record for one user's attempt to access a vnode | |
667 | */ | |
668 | struct afs_permit { | |
669 | struct key *key; /* RxRPC ticket holding a security context */ | |
be080a6f | 670 | afs_access_t access; /* CallerAccess value for this key */ |
00d3b7a4 DH |
671 | }; |
672 | ||
673 | /* | |
be080a6f DH |
674 | * Immutable cache of CallerAccess records from attempts to access vnodes. |
675 | * These may be shared between multiple vnodes. | |
00d3b7a4 DH |
676 | */ |
677 | struct afs_permits { | |
be080a6f DH |
678 | struct rcu_head rcu; |
679 | struct hlist_node hash_node; /* Link in hash */ | |
680 | unsigned long h; /* Hash value for this permit list */ | |
681 | refcount_t usage; | |
682 | unsigned short nr_permits; /* Number of records */ | |
683 | bool invalidated; /* Invalidated due to key change */ | |
684 | struct afs_permit permits[]; /* List of permits sorted by key pointer */ | |
00d3b7a4 DH |
685 | }; |
686 | ||
b908fe6b DH |
687 | /* |
688 | * record of one of a system's set of network interfaces | |
689 | */ | |
690 | struct afs_interface { | |
b908fe6b DH |
691 | struct in_addr address; /* IPv4 address bound to interface */ |
692 | struct in_addr netmask; /* netmask applied to address */ | |
693 | unsigned mtu; /* MTU of interface */ | |
694 | }; | |
695 | ||
4584ae96 DH |
696 | /* |
697 | * Error prioritisation and accumulation. | |
698 | */ | |
699 | struct afs_error { | |
700 | short error; /* Accumulated error */ | |
701 | bool responded; /* T if server responded */ | |
702 | }; | |
703 | ||
8b2a464c DH |
704 | /* |
705 | * Cursor for iterating over a server's address list. | |
706 | */ | |
707 | struct afs_addr_cursor { | |
708 | struct afs_addr_list *alist; /* Current address list (pins ref) */ | |
3bf0fb6f DH |
709 | unsigned long tried; /* Tried addresses */ |
710 | signed char index; /* Current address */ | |
8b2a464c | 711 | bool responded; /* T if the current address responded */ |
744bcd71 | 712 | unsigned short nr_iterations; /* Number of address iterations */ |
3bf0fb6f DH |
713 | short error; |
714 | u32 abort_code; | |
8b2a464c DH |
715 | }; |
716 | ||
0a5143f2 DH |
717 | /* |
718 | * Cursor for iterating over a set of volume location servers. | |
719 | */ | |
720 | struct afs_vl_cursor { | |
721 | struct afs_addr_cursor ac; | |
722 | struct afs_cell *cell; /* The cell we're querying */ | |
723 | struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ | |
3bf0fb6f | 724 | struct afs_vlserver *server; /* Server on which this resides */ |
0a5143f2 | 725 | struct key *key; /* Key for the server */ |
3bf0fb6f DH |
726 | unsigned long untried; /* Bitmask of untried servers */ |
727 | short index; /* Current server */ | |
0a5143f2 DH |
728 | short error; |
729 | unsigned short flags; | |
730 | #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ | |
731 | #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ | |
732 | #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ | |
744bcd71 | 733 | unsigned short nr_iterations; /* Number of server iterations */ |
0a5143f2 DH |
734 | }; |
735 | ||
8b2a464c DH |
736 | /* |
737 | * Cursor for iterating over a set of fileservers. | |
738 | */ | |
739 | struct afs_fs_cursor { | |
740 | struct afs_addr_cursor ac; | |
d2ddc776 DH |
741 | struct afs_vnode *vnode; |
742 | struct afs_server_list *server_list; /* Current server list (pins ref) */ | |
743 | struct afs_cb_interest *cbi; /* Server on which this resides (pins ref) */ | |
744 | struct key *key; /* Key for the server */ | |
3bf0fb6f | 745 | unsigned long untried; /* Bitmask of untried servers */ |
d2ddc776 DH |
746 | unsigned int cb_break; /* cb_break + cb_s_break before the call */ |
747 | unsigned int cb_break_2; /* cb_break + cb_s_break (2nd vnode) */ | |
3bf0fb6f | 748 | short index; /* Current server */ |
e7f680f4 | 749 | short error; |
d2ddc776 DH |
750 | unsigned short flags; |
751 | #define AFS_FS_CURSOR_STOP 0x0001 /* Set to cease iteration */ | |
752 | #define AFS_FS_CURSOR_VBUSY 0x0002 /* Set if seen VBUSY */ | |
753 | #define AFS_FS_CURSOR_VMOVED 0x0004 /* Set if seen VMOVED */ | |
754 | #define AFS_FS_CURSOR_VNOVOL 0x0008 /* Set if seen VNOVOL */ | |
755 | #define AFS_FS_CURSOR_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ | |
756 | #define AFS_FS_CURSOR_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ | |
744bcd71 | 757 | unsigned short nr_iterations; /* Number of server iterations */ |
8b2a464c DH |
758 | }; |
759 | ||
402cb8dd DH |
760 | /* |
761 | * Cache auxiliary data. | |
762 | */ | |
763 | struct afs_vnode_cache_aux { | |
764 | u64 data_version; | |
765 | } __packed; | |
766 | ||
98bf40cd DH |
767 | #include <trace/events/afs.h> |
768 | ||
08e0e7c8 | 769 | /*****************************************************************************/ |
8b2a464c DH |
770 | /* |
771 | * addr_list.c | |
772 | */ | |
773 | static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) | |
774 | { | |
775 | if (alist) | |
776 | refcount_inc(&alist->usage); | |
777 | return alist; | |
778 | } | |
779 | extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, | |
780 | unsigned short, | |
781 | unsigned short); | |
782 | extern void afs_put_addrlist(struct afs_addr_list *); | |
0a5143f2 DH |
783 | extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, |
784 | const char *, size_t, char, | |
785 | unsigned short, unsigned short); | |
786 | extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); | |
8b2a464c DH |
787 | extern bool afs_iterate_addresses(struct afs_addr_cursor *); |
788 | extern int afs_end_cursor(struct afs_addr_cursor *); | |
8b2a464c | 789 | |
bf99a53c DH |
790 | extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); |
791 | extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); | |
d2ddc776 | 792 | |
9b3f26c9 DH |
793 | /* |
794 | * cache.c | |
795 | */ | |
796 | #ifdef CONFIG_AFS_FSCACHE | |
797 | extern struct fscache_netfs afs_cache_netfs; | |
798 | extern struct fscache_cookie_def afs_cell_cache_index_def; | |
9b3f26c9 DH |
799 | extern struct fscache_cookie_def afs_volume_cache_index_def; |
800 | extern struct fscache_cookie_def afs_vnode_cache_index_def; | |
801 | #else | |
802 | #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
9b3f26c9 DH |
803 | #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) |
804 | #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
805 | #endif | |
806 | ||
08e0e7c8 DH |
807 | /* |
808 | * callback.c | |
809 | */ | |
810 | extern void afs_init_callback_state(struct afs_server *); | |
30062bd1 | 811 | extern void __afs_break_callback(struct afs_vnode *); |
c435ee34 | 812 | extern void afs_break_callback(struct afs_vnode *); |
5cf9dd55 | 813 | extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break*); |
c435ee34 | 814 | |
d4a96bec DH |
815 | extern int afs_register_server_cb_interest(struct afs_vnode *, |
816 | struct afs_server_list *, unsigned int); | |
c435ee34 | 817 | extern void afs_put_cb_interest(struct afs_net *, struct afs_cb_interest *); |
d2ddc776 | 818 | extern void afs_clear_callback_interests(struct afs_net *, struct afs_server_list *); |
c435ee34 DH |
819 | |
820 | static inline struct afs_cb_interest *afs_get_cb_interest(struct afs_cb_interest *cbi) | |
821 | { | |
d4a96bec DH |
822 | if (cbi) |
823 | refcount_inc(&cbi->usage); | |
c435ee34 DH |
824 | return cbi; |
825 | } | |
08e0e7c8 | 826 | |
68251f0a DH |
827 | static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) |
828 | { | |
eeba1e9c | 829 | return vnode->cb_break + vnode->cb_v_break; |
68251f0a DH |
830 | } |
831 | ||
18ac6185 DH |
832 | static inline bool afs_cb_is_broken(unsigned int cb_break, |
833 | const struct afs_vnode *vnode, | |
834 | const struct afs_cb_interest *cbi) | |
68251f0a | 835 | { |
18ac6185 | 836 | return !cbi || cb_break != (vnode->cb_break + |
18ac6185 | 837 | vnode->volume->cb_v_break); |
68251f0a DH |
838 | } |
839 | ||
1da177e4 LT |
840 | /* |
841 | * cell.c | |
842 | */ | |
989782dc DH |
843 | extern int afs_cell_init(struct afs_net *, const char *); |
844 | extern struct afs_cell *afs_lookup_cell_rcu(struct afs_net *, const char *, unsigned); | |
845 | extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, | |
846 | const char *, bool); | |
8b2a464c | 847 | extern struct afs_cell *afs_get_cell(struct afs_cell *); |
9ed900b1 | 848 | extern void afs_put_cell(struct afs_net *, struct afs_cell *); |
989782dc DH |
849 | extern void afs_manage_cells(struct work_struct *); |
850 | extern void afs_cells_timer(struct timer_list *); | |
f044c884 | 851 | extern void __net_exit afs_cell_purge(struct afs_net *); |
08e0e7c8 DH |
852 | |
853 | /* | |
854 | * cmservice.c | |
855 | */ | |
856 | extern bool afs_cm_incoming_call(struct afs_call *); | |
857 | ||
1da177e4 LT |
858 | /* |
859 | * dir.c | |
860 | */ | |
4d673da1 | 861 | extern const struct file_operations afs_dir_file_operations; |
754661f1 | 862 | extern const struct inode_operations afs_dir_inode_operations; |
f3ddee8d | 863 | extern const struct address_space_operations afs_dir_aops; |
d61dcce2 | 864 | extern const struct dentry_operations afs_fs_dentry_operations; |
4d673da1 | 865 | |
66c7e1d3 DH |
866 | extern void afs_d_release(struct dentry *); |
867 | ||
63a4681f DH |
868 | /* |
869 | * dir_edit.c | |
870 | */ | |
871 | extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, | |
872 | enum afs_edit_dir_reason); | |
873 | extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); | |
874 | ||
66c7e1d3 DH |
875 | /* |
876 | * dynroot.c | |
877 | */ | |
878 | extern const struct file_operations afs_dynroot_file_operations; | |
879 | extern const struct inode_operations afs_dynroot_inode_operations; | |
880 | extern const struct dentry_operations afs_dynroot_dentry_operations; | |
881 | ||
882 | extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); | |
0da0b7fd DH |
883 | extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); |
884 | extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); | |
885 | extern int afs_dynroot_populate(struct super_block *); | |
886 | extern void afs_dynroot_depopulate(struct super_block *); | |
1da177e4 LT |
887 | |
888 | /* | |
889 | * file.c | |
890 | */ | |
f5e54d6e | 891 | extern const struct address_space_operations afs_fs_aops; |
754661f1 | 892 | extern const struct inode_operations afs_file_inode_operations; |
00d3b7a4 DH |
893 | extern const struct file_operations afs_file_operations; |
894 | ||
4343d008 DH |
895 | extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); |
896 | extern void afs_put_wb_key(struct afs_wb_key *); | |
00d3b7a4 DH |
897 | extern int afs_open(struct inode *, struct file *); |
898 | extern int afs_release(struct inode *, struct file *); | |
d2ddc776 | 899 | extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *); |
f6d335c0 | 900 | extern int afs_page_filler(void *, struct page *); |
196ee9cd | 901 | extern void afs_put_read(struct afs_read *); |
1da177e4 | 902 | |
e8d6c554 DH |
903 | /* |
904 | * flock.c | |
905 | */ | |
f044c884 DH |
906 | extern struct workqueue_struct *afs_lock_manager; |
907 | ||
e8d6c554 DH |
908 | extern void afs_lock_work(struct work_struct *); |
909 | extern void afs_lock_may_be_available(struct afs_vnode *); | |
910 | extern int afs_lock(struct file *, int, struct file_lock *); | |
911 | extern int afs_flock(struct file *, int, struct file_lock *); | |
912 | ||
08e0e7c8 DH |
913 | /* |
914 | * fsclient.c | |
915 | */ | |
dd9fbcb8 DH |
916 | #define AFS_VNODE_NOT_YET_SET 0x01 |
917 | #define AFS_VNODE_META_CHANGED 0x02 | |
918 | #define AFS_VNODE_DATA_CHANGED 0x04 | |
919 | extern void afs_update_inode_from_status(struct afs_vnode *, struct afs_file_status *, | |
920 | const afs_dataversion_t *, u8); | |
921 | ||
0c3a5ac2 | 922 | extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *, bool); |
d2ddc776 DH |
923 | extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *); |
924 | extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *); | |
63a4681f | 925 | extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t, u64, |
d2ddc776 | 926 | struct afs_fid *, struct afs_file_status *, struct afs_callback *); |
30062bd1 | 927 | extern int afs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool, u64); |
63a4681f DH |
928 | extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64); |
929 | extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, u64, | |
d2ddc776 DH |
930 | struct afs_fid *, struct afs_file_status *); |
931 | extern int afs_fs_rename(struct afs_fs_cursor *, const char *, | |
63a4681f | 932 | struct afs_vnode *, const char *, u64, u64); |
4343d008 | 933 | extern int afs_fs_store_data(struct afs_fs_cursor *, struct address_space *, |
d2ddc776 DH |
934 | pgoff_t, pgoff_t, unsigned, unsigned); |
935 | extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *); | |
936 | extern int afs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *); | |
937 | extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t); | |
938 | extern int afs_fs_extend_lock(struct afs_fs_cursor *); | |
939 | extern int afs_fs_release_lock(struct afs_fs_cursor *); | |
940 | extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, | |
941 | struct afs_addr_cursor *, struct key *); | |
0b9bf381 DH |
942 | extern struct afs_call *afs_fs_get_capabilities(struct afs_net *, struct afs_server *, |
943 | struct afs_addr_cursor *, struct key *, | |
944 | unsigned int); | |
5cf9dd55 DH |
945 | extern int afs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *, |
946 | struct afs_fid *, struct afs_file_status *, | |
947 | struct afs_callback *, unsigned int, | |
948 | struct afs_volsync *); | |
949 | extern int afs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *, | |
950 | struct afs_fid *, struct afs_file_status *, | |
951 | struct afs_callback *, struct afs_volsync *); | |
08e0e7c8 | 952 | |
3bf0fb6f DH |
953 | /* |
954 | * fs_probe.c | |
955 | */ | |
956 | extern void afs_fileserver_probe_result(struct afs_call *); | |
957 | extern int afs_probe_fileservers(struct afs_net *, struct key *, struct afs_server_list *); | |
958 | extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long); | |
959 | ||
1da177e4 LT |
960 | /* |
961 | * inode.c | |
962 | */ | |
0c3a5ac2 | 963 | extern int afs_fetch_status(struct afs_vnode *, struct key *, bool); |
c435ee34 | 964 | extern int afs_iget5_test(struct inode *, void *); |
4d673da1 | 965 | extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); |
00d3b7a4 | 966 | extern struct inode *afs_iget(struct super_block *, struct key *, |
260a9803 | 967 | struct afs_fid *, struct afs_file_status *, |
d2ddc776 DH |
968 | struct afs_callback *, |
969 | struct afs_cb_interest *); | |
416351f2 | 970 | extern void afs_zap_data(struct afs_vnode *); |
260a9803 | 971 | extern int afs_validate(struct afs_vnode *, struct key *); |
a528d35e | 972 | extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); |
31143d5d | 973 | extern int afs_setattr(struct dentry *, struct iattr *); |
b57922d9 | 974 | extern void afs_evict_inode(struct inode *); |
bec5eb61 | 975 | extern int afs_drop_inode(struct inode *); |
1da177e4 LT |
976 | |
977 | /* | |
978 | * main.c | |
979 | */ | |
0ad53eee | 980 | extern struct workqueue_struct *afs_wq; |
5b86d4ff | 981 | extern int afs_net_id; |
f044c884 | 982 | |
5b86d4ff | 983 | static inline struct afs_net *afs_net(struct net *net) |
f044c884 | 984 | { |
5b86d4ff | 985 | return net_generic(net, afs_net_id); |
f044c884 DH |
986 | } |
987 | ||
5b86d4ff | 988 | static inline struct afs_net *afs_sb2net(struct super_block *sb) |
f044c884 | 989 | { |
5b86d4ff | 990 | return afs_net(AFS_FS_S(sb)->net_ns); |
f044c884 DH |
991 | } |
992 | ||
5b86d4ff | 993 | static inline struct afs_net *afs_d2net(struct dentry *dentry) |
f044c884 | 994 | { |
5b86d4ff | 995 | return afs_sb2net(dentry->d_sb); |
f044c884 DH |
996 | } |
997 | ||
5b86d4ff | 998 | static inline struct afs_net *afs_i2net(struct inode *inode) |
f044c884 | 999 | { |
5b86d4ff | 1000 | return afs_sb2net(inode->i_sb); |
f044c884 DH |
1001 | } |
1002 | ||
5b86d4ff | 1003 | static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) |
f044c884 | 1004 | { |
5b86d4ff | 1005 | return afs_i2net(&vnode->vfs_inode); |
f044c884 DH |
1006 | } |
1007 | ||
5b86d4ff | 1008 | static inline struct afs_net *afs_sock2net(struct sock *sk) |
f044c884 | 1009 | { |
5b86d4ff | 1010 | return net_generic(sock_net(sk), afs_net_id); |
f044c884 | 1011 | } |
1da177e4 | 1012 | |
d55b4da4 DH |
1013 | static inline void __afs_stat(atomic_t *s) |
1014 | { | |
1015 | atomic_inc(s); | |
1016 | } | |
1017 | ||
1018 | #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) | |
1019 | ||
08e0e7c8 DH |
1020 | /* |
1021 | * misc.c | |
1022 | */ | |
1023 | extern int afs_abort_to_error(u32); | |
4584ae96 | 1024 | extern void afs_prioritise_error(struct afs_error *, int, u32); |
08e0e7c8 | 1025 | |
1da177e4 LT |
1026 | /* |
1027 | * mntpt.c | |
1028 | */ | |
754661f1 | 1029 | extern const struct inode_operations afs_mntpt_inode_operations; |
bec5eb61 | 1030 | extern const struct inode_operations afs_autocell_inode_operations; |
4b6f5d20 | 1031 | extern const struct file_operations afs_mntpt_file_operations; |
1da177e4 | 1032 | |
d18610b0 | 1033 | extern struct vfsmount *afs_d_automount(struct path *); |
08e0e7c8 | 1034 | extern void afs_mntpt_kill_timer(void); |
1da177e4 | 1035 | |
b4db2b35 AB |
1036 | /* |
1037 | * netdevices.c | |
1038 | */ | |
5b86d4ff DH |
1039 | extern int afs_get_ipv4_interfaces(struct afs_net *, struct afs_interface *, |
1040 | size_t, bool); | |
b4db2b35 | 1041 | |
1da177e4 LT |
1042 | /* |
1043 | * proc.c | |
1044 | */ | |
b6cfbeca | 1045 | #ifdef CONFIG_PROC_FS |
f044c884 DH |
1046 | extern int __net_init afs_proc_init(struct afs_net *); |
1047 | extern void __net_exit afs_proc_cleanup(struct afs_net *); | |
5b86d4ff DH |
1048 | extern int afs_proc_cell_setup(struct afs_cell *); |
1049 | extern void afs_proc_cell_remove(struct afs_cell *); | |
6f8880d8 | 1050 | extern void afs_put_sysnames(struct afs_sysnames *); |
b6cfbeca DH |
1051 | #else |
1052 | static inline int afs_proc_init(struct afs_net *net) { return 0; } | |
1053 | static inline void afs_proc_cleanup(struct afs_net *net) {} | |
1054 | static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } | |
1055 | static inline void afs_proc_cell_remove(struct afs_cell *cell) {} | |
1056 | static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} | |
1057 | #endif | |
1da177e4 | 1058 | |
d2ddc776 DH |
1059 | /* |
1060 | * rotate.c | |
1061 | */ | |
1062 | extern bool afs_begin_vnode_operation(struct afs_fs_cursor *, struct afs_vnode *, | |
1063 | struct key *); | |
1064 | extern bool afs_select_fileserver(struct afs_fs_cursor *); | |
1065 | extern bool afs_select_current_fileserver(struct afs_fs_cursor *); | |
1066 | extern int afs_end_vnode_operation(struct afs_fs_cursor *); | |
1067 | ||
08e0e7c8 DH |
1068 | /* |
1069 | * rxrpc.c | |
1070 | */ | |
f044c884 | 1071 | extern struct workqueue_struct *afs_async_calls; |
8324f0bc | 1072 | |
f044c884 DH |
1073 | extern int __net_init afs_open_socket(struct afs_net *); |
1074 | extern void __net_exit afs_close_socket(struct afs_net *); | |
1075 | extern void afs_charge_preallocation(struct work_struct *); | |
341f741f | 1076 | extern void afs_put_call(struct afs_call *); |
0b9bf381 DH |
1077 | extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t); |
1078 | extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *); | |
f044c884 DH |
1079 | extern struct afs_call *afs_alloc_flat_call(struct afs_net *, |
1080 | const struct afs_call_type *, | |
08e0e7c8 DH |
1081 | size_t, size_t); |
1082 | extern void afs_flat_call_destructor(struct afs_call *); | |
08e0e7c8 | 1083 | extern void afs_send_empty_reply(struct afs_call *); |
b908fe6b | 1084 | extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); |
12bdcf33 | 1085 | extern int afs_extract_data(struct afs_call *, bool); |
160cb957 | 1086 | extern int afs_protocol_error(struct afs_call *, int, enum afs_eproto_cause); |
08e0e7c8 | 1087 | |
12bdcf33 DH |
1088 | static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) |
1089 | { | |
1090 | call->kvec[0].iov_base = buf; | |
1091 | call->kvec[0].iov_len = size; | |
1092 | iov_iter_kvec(&call->iter, READ, call->kvec, 1, size); | |
1093 | } | |
1094 | ||
1095 | static inline void afs_extract_to_tmp(struct afs_call *call) | |
1096 | { | |
1097 | afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); | |
1098 | } | |
1099 | ||
1100 | static inline void afs_extract_to_tmp64(struct afs_call *call) | |
1101 | { | |
1102 | afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); | |
1103 | } | |
1104 | ||
1105 | static inline void afs_extract_discard(struct afs_call *call, size_t size) | |
1106 | { | |
1107 | iov_iter_discard(&call->iter, READ, size); | |
1108 | } | |
1109 | ||
1110 | static inline void afs_extract_to_buf(struct afs_call *call, size_t size) | |
1111 | { | |
1112 | afs_extract_begin(call, call->buffer, size); | |
1113 | } | |
1114 | ||
d001648e | 1115 | static inline int afs_transfer_reply(struct afs_call *call) |
372ee163 | 1116 | { |
12bdcf33 | 1117 | return afs_extract_data(call, false); |
372ee163 DH |
1118 | } |
1119 | ||
98bf40cd DH |
1120 | static inline bool afs_check_call_state(struct afs_call *call, |
1121 | enum afs_call_state state) | |
1122 | { | |
1123 | return READ_ONCE(call->state) == state; | |
1124 | } | |
1125 | ||
1126 | static inline bool afs_set_call_state(struct afs_call *call, | |
1127 | enum afs_call_state from, | |
1128 | enum afs_call_state to) | |
1129 | { | |
1130 | bool ok = false; | |
1131 | ||
1132 | spin_lock_bh(&call->state_lock); | |
1133 | if (call->state == from) { | |
1134 | call->state = to; | |
1135 | trace_afs_call_state(call, from, to, 0, 0); | |
1136 | ok = true; | |
1137 | } | |
1138 | spin_unlock_bh(&call->state_lock); | |
1139 | return ok; | |
1140 | } | |
1141 | ||
1142 | static inline void afs_set_call_complete(struct afs_call *call, | |
1143 | int error, u32 remote_abort) | |
1144 | { | |
1145 | enum afs_call_state state; | |
1146 | bool ok = false; | |
1147 | ||
1148 | spin_lock_bh(&call->state_lock); | |
1149 | state = call->state; | |
1150 | if (state != AFS_CALL_COMPLETE) { | |
1151 | call->abort_code = remote_abort; | |
1152 | call->error = error; | |
1153 | call->state = AFS_CALL_COMPLETE; | |
1154 | trace_afs_call_state(call, state, AFS_CALL_COMPLETE, | |
1155 | error, remote_abort); | |
1156 | ok = true; | |
1157 | } | |
1158 | spin_unlock_bh(&call->state_lock); | |
1159 | if (ok) | |
1160 | trace_afs_call_done(call); | |
1161 | } | |
1162 | ||
00d3b7a4 DH |
1163 | /* |
1164 | * security.c | |
1165 | */ | |
be080a6f | 1166 | extern void afs_put_permits(struct afs_permits *); |
00d3b7a4 | 1167 | extern void afs_clear_permits(struct afs_vnode *); |
be080a6f | 1168 | extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int); |
416351f2 | 1169 | extern void afs_zap_permits(struct rcu_head *); |
00d3b7a4 | 1170 | extern struct key *afs_request_key(struct afs_cell *); |
0fafdc9f | 1171 | extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); |
10556cb2 | 1172 | extern int afs_permission(struct inode *, int); |
be080a6f | 1173 | extern void __exit afs_clean_up_permit_cache(void); |
00d3b7a4 | 1174 | |
08e0e7c8 DH |
1175 | /* |
1176 | * server.c | |
1177 | */ | |
1178 | extern spinlock_t afs_server_peer_lock; | |
1179 | ||
c435ee34 DH |
1180 | static inline struct afs_server *afs_get_server(struct afs_server *server) |
1181 | { | |
1182 | atomic_inc(&server->usage); | |
1183 | return server; | |
1184 | } | |
08e0e7c8 | 1185 | |
f044c884 DH |
1186 | extern struct afs_server *afs_find_server(struct afs_net *, |
1187 | const struct sockaddr_rxrpc *); | |
d2ddc776 DH |
1188 | extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); |
1189 | extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *); | |
9ed900b1 | 1190 | extern void afs_put_server(struct afs_net *, struct afs_server *); |
d2ddc776 DH |
1191 | extern void afs_manage_servers(struct work_struct *); |
1192 | extern void afs_servers_timer(struct timer_list *); | |
f044c884 | 1193 | extern void __net_exit afs_purge_servers(struct afs_net *); |
d2ddc776 | 1194 | extern bool afs_check_server_record(struct afs_fs_cursor *, struct afs_server *); |
08e0e7c8 | 1195 | |
00d3b7a4 | 1196 | /* |
d2ddc776 | 1197 | * server_list.c |
00d3b7a4 | 1198 | */ |
d2ddc776 DH |
1199 | static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) |
1200 | { | |
1201 | refcount_inc(&slist->usage); | |
1202 | return slist; | |
1203 | } | |
00d3b7a4 | 1204 | |
d2ddc776 DH |
1205 | extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); |
1206 | extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, | |
1207 | struct afs_vldb_entry *, | |
1208 | u8); | |
1209 | extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); | |
08e0e7c8 DH |
1210 | |
1211 | /* | |
d2ddc776 | 1212 | * super.c |
08e0e7c8 | 1213 | */ |
d2ddc776 | 1214 | extern int __init afs_fs_init(void); |
5b86d4ff | 1215 | extern void afs_fs_exit(void); |
08e0e7c8 DH |
1216 | |
1217 | /* | |
d2ddc776 | 1218 | * vlclient.c |
08e0e7c8 | 1219 | */ |
0a5143f2 DH |
1220 | extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, |
1221 | const char *, int); | |
1222 | extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); | |
0b9bf381 DH |
1223 | extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, |
1224 | struct key *, struct afs_vlserver *, unsigned int); | |
0a5143f2 DH |
1225 | extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); |
1226 | ||
3bf0fb6f DH |
1227 | /* |
1228 | * vl_probe.c | |
1229 | */ | |
1230 | extern void afs_vlserver_probe_result(struct afs_call *); | |
1231 | extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); | |
1232 | extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); | |
1233 | ||
0a5143f2 DH |
1234 | /* |
1235 | * vl_rotate.c | |
1236 | */ | |
1237 | extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, | |
1238 | struct afs_cell *, struct key *); | |
1239 | extern bool afs_select_vlserver(struct afs_vl_cursor *); | |
1240 | extern bool afs_select_current_vlserver(struct afs_vl_cursor *); | |
1241 | extern int afs_end_vlserver_operation(struct afs_vl_cursor *); | |
1242 | ||
1243 | /* | |
1244 | * vlserver_list.c | |
1245 | */ | |
1246 | static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) | |
1247 | { | |
1248 | atomic_inc(&vlserver->usage); | |
1249 | return vlserver; | |
1250 | } | |
1251 | ||
1252 | static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) | |
1253 | { | |
1254 | if (vllist) | |
1255 | atomic_inc(&vllist->usage); | |
1256 | return vllist; | |
1257 | } | |
1258 | ||
1259 | extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); | |
1260 | extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); | |
1261 | extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); | |
1262 | extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); | |
1263 | extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, | |
1264 | const void *, size_t); | |
08e0e7c8 DH |
1265 | |
1266 | /* | |
1267 | * volume.c | |
1268 | */ | |
d2ddc776 | 1269 | static inline struct afs_volume *__afs_get_volume(struct afs_volume *volume) |
49566f6f DH |
1270 | { |
1271 | if (volume) | |
1272 | atomic_inc(&volume->usage); | |
1273 | return volume; | |
1274 | } | |
08e0e7c8 | 1275 | |
13fcc683 | 1276 | extern struct afs_volume *afs_create_volume(struct afs_fs_context *); |
d2ddc776 DH |
1277 | extern void afs_activate_volume(struct afs_volume *); |
1278 | extern void afs_deactivate_volume(struct afs_volume *); | |
9ed900b1 | 1279 | extern void afs_put_volume(struct afs_cell *, struct afs_volume *); |
d2ddc776 | 1280 | extern int afs_check_volume_status(struct afs_volume *, struct key *); |
08e0e7c8 | 1281 | |
31143d5d DH |
1282 | /* |
1283 | * write.c | |
1284 | */ | |
1285 | extern int afs_set_page_dirty(struct page *); | |
15b4650e NP |
1286 | extern int afs_write_begin(struct file *file, struct address_space *mapping, |
1287 | loff_t pos, unsigned len, unsigned flags, | |
1288 | struct page **pagep, void **fsdata); | |
1289 | extern int afs_write_end(struct file *file, struct address_space *mapping, | |
1290 | loff_t pos, unsigned len, unsigned copied, | |
1291 | struct page *page, void *fsdata); | |
31143d5d DH |
1292 | extern int afs_writepage(struct page *, struct writeback_control *); |
1293 | extern int afs_writepages(struct address_space *, struct writeback_control *); | |
31143d5d | 1294 | extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); |
50b5551d | 1295 | extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); |
02c24a82 | 1296 | extern int afs_fsync(struct file *, loff_t, loff_t, int); |
0722f186 | 1297 | extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); |
4343d008 DH |
1298 | extern void afs_prune_wb_keys(struct afs_vnode *); |
1299 | extern int afs_launder_page(struct page *); | |
31143d5d | 1300 | |
d3e3b7ea DH |
1301 | /* |
1302 | * xattr.c | |
1303 | */ | |
1304 | extern const struct xattr_handler *afs_xattr_handlers[]; | |
1305 | extern ssize_t afs_listxattr(struct dentry *, char *, size_t); | |
31143d5d | 1306 | |
30062bd1 DH |
1307 | /* |
1308 | * yfsclient.c | |
1309 | */ | |
1310 | extern int yfs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *, bool); | |
1311 | extern int yfs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *); | |
1312 | extern int yfs_fs_create_file(struct afs_fs_cursor *, const char *, umode_t, u64, | |
1313 | struct afs_fid *, struct afs_file_status *, struct afs_callback *); | |
1314 | extern int yfs_fs_make_dir(struct afs_fs_cursor *, const char *, umode_t, u64, | |
1315 | struct afs_fid *, struct afs_file_status *, struct afs_callback *); | |
1316 | extern int yfs_fs_remove_file2(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64); | |
1317 | extern int yfs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool, u64); | |
1318 | extern int yfs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64); | |
1319 | extern int yfs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, u64, | |
1320 | struct afs_fid *, struct afs_file_status *); | |
1321 | extern int yfs_fs_rename(struct afs_fs_cursor *, const char *, | |
1322 | struct afs_vnode *, const char *, u64, u64); | |
1323 | extern int yfs_fs_store_data(struct afs_fs_cursor *, struct address_space *, | |
1324 | pgoff_t, pgoff_t, unsigned, unsigned); | |
1325 | extern int yfs_fs_setattr(struct afs_fs_cursor *, struct iattr *); | |
1326 | extern int yfs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *); | |
1327 | extern int yfs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t); | |
1328 | extern int yfs_fs_extend_lock(struct afs_fs_cursor *); | |
1329 | extern int yfs_fs_release_lock(struct afs_fs_cursor *); | |
1330 | extern int yfs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *, | |
1331 | struct afs_fid *, struct afs_file_status *, | |
1332 | struct afs_callback *, struct afs_volsync *); | |
1333 | extern int yfs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *, | |
1334 | struct afs_fid *, struct afs_file_status *, | |
1335 | struct afs_callback *, unsigned int, | |
1336 | struct afs_volsync *); | |
d2ddc776 DH |
1337 | |
1338 | /* | |
1339 | * Miscellaneous inline functions. | |
1340 | */ | |
1341 | static inline struct afs_vnode *AFS_FS_I(struct inode *inode) | |
1342 | { | |
1343 | return container_of(inode, struct afs_vnode, vfs_inode); | |
1344 | } | |
1345 | ||
1346 | static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) | |
1347 | { | |
1348 | return &vnode->vfs_inode; | |
1349 | } | |
1350 | ||
1351 | static inline void afs_vnode_commit_status(struct afs_fs_cursor *fc, | |
1352 | struct afs_vnode *vnode, | |
1353 | unsigned int cb_break) | |
1354 | { | |
1355 | if (fc->ac.error == 0) | |
1356 | afs_cache_permit(vnode, fc->key, cb_break); | |
1357 | } | |
1358 | ||
1359 | static inline void afs_check_for_remote_deletion(struct afs_fs_cursor *fc, | |
1360 | struct afs_vnode *vnode) | |
1361 | { | |
1362 | if (fc->ac.error == -ENOENT) { | |
1363 | set_bit(AFS_VNODE_DELETED, &vnode->flags); | |
1364 | afs_break_callback(vnode); | |
1365 | } | |
1366 | } | |
1367 | ||
f51375cd DH |
1368 | static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) |
1369 | { | |
1370 | trace_afs_io_error(call->debug_id, -EIO, where); | |
1371 | return -EIO; | |
1372 | } | |
1373 | ||
1374 | static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) | |
1375 | { | |
1376 | trace_afs_file_error(vnode, -EIO, where); | |
1377 | return -EIO; | |
1378 | } | |
d2ddc776 | 1379 | |
08e0e7c8 DH |
1380 | /*****************************************************************************/ |
1381 | /* | |
1382 | * debug tracing | |
1383 | */ | |
1384 | extern unsigned afs_debug; | |
1385 | ||
1386 | #define dbgprintk(FMT,...) \ | |
ad16df84 | 1387 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
08e0e7c8 | 1388 | |
530b6412 HH |
1389 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1390 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
08e0e7c8 DH |
1391 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
1392 | ||
1393 | ||
1394 | #if defined(__KDEBUG) | |
1395 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
1396 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
1397 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
1398 | ||
1399 | #elif defined(CONFIG_AFS_DEBUG) | |
1400 | #define AFS_DEBUG_KENTER 0x01 | |
1401 | #define AFS_DEBUG_KLEAVE 0x02 | |
1402 | #define AFS_DEBUG_KDEBUG 0x04 | |
1403 | ||
1404 | #define _enter(FMT,...) \ | |
1405 | do { \ | |
1406 | if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ | |
1407 | kenter(FMT,##__VA_ARGS__); \ | |
1408 | } while (0) | |
1409 | ||
1410 | #define _leave(FMT,...) \ | |
1411 | do { \ | |
1412 | if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ | |
1413 | kleave(FMT,##__VA_ARGS__); \ | |
1414 | } while (0) | |
1415 | ||
1416 | #define _debug(FMT,...) \ | |
1417 | do { \ | |
1418 | if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ | |
1419 | kdebug(FMT,##__VA_ARGS__); \ | |
1420 | } while (0) | |
1421 | ||
1422 | #else | |
12fdff3f DH |
1423 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1424 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
1425 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
08e0e7c8 DH |
1426 | #endif |
1427 | ||
1428 | /* | |
1429 | * debug assertion checking | |
1430 | */ | |
1431 | #if 1 // defined(__KDEBUGALL) | |
1432 | ||
1433 | #define ASSERT(X) \ | |
1434 | do { \ | |
1435 | if (unlikely(!(X))) { \ | |
1436 | printk(KERN_ERR "\n"); \ | |
1437 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1438 | BUG(); \ | |
1439 | } \ | |
1440 | } while(0) | |
1441 | ||
1442 | #define ASSERTCMP(X, OP, Y) \ | |
1443 | do { \ | |
1444 | if (unlikely(!((X) OP (Y)))) { \ | |
1445 | printk(KERN_ERR "\n"); \ | |
1446 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1447 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
1448 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1449 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
1450 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1451 | BUG(); \ | |
1452 | } \ | |
1453 | } while(0) | |
1454 | ||
416351f2 DH |
1455 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
1456 | do { \ | |
1457 | if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ | |
1458 | printk(KERN_ERR "\n"); \ | |
1459 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1460 | printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ | |
1461 | (unsigned long)(L), (unsigned long)(N), \ | |
1462 | (unsigned long)(H)); \ | |
1463 | printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ | |
1464 | (unsigned long)(L), (unsigned long)(N), \ | |
1465 | (unsigned long)(H)); \ | |
1466 | BUG(); \ | |
1467 | } \ | |
1468 | } while(0) | |
1469 | ||
08e0e7c8 DH |
1470 | #define ASSERTIF(C, X) \ |
1471 | do { \ | |
1472 | if (unlikely((C) && !(X))) { \ | |
1473 | printk(KERN_ERR "\n"); \ | |
1474 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1475 | BUG(); \ | |
1476 | } \ | |
1477 | } while(0) | |
1478 | ||
1479 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1480 | do { \ | |
1481 | if (unlikely((C) && !((X) OP (Y)))) { \ | |
1482 | printk(KERN_ERR "\n"); \ | |
1483 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1484 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
1485 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1486 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
1487 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1488 | BUG(); \ | |
1489 | } \ | |
1490 | } while(0) | |
1491 | ||
1492 | #else | |
1493 | ||
1494 | #define ASSERT(X) \ | |
1495 | do { \ | |
1496 | } while(0) | |
1497 | ||
1498 | #define ASSERTCMP(X, OP, Y) \ | |
1499 | do { \ | |
1500 | } while(0) | |
1501 | ||
416351f2 DH |
1502 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
1503 | do { \ | |
1504 | } while(0) | |
1505 | ||
08e0e7c8 DH |
1506 | #define ASSERTIF(C, X) \ |
1507 | do { \ | |
1508 | } while(0) | |
1509 | ||
1510 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1511 | do { \ | |
1512 | } while(0) | |
1513 | ||
1514 | #endif /* __KDEBUGALL */ |