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 | ||
6c6c1d63 DH |
39 | /* |
40 | * Partial file-locking emulation mode. (The problem being that AFS3 only | |
41 | * allows whole-file locks and no upgrading/downgrading). | |
42 | */ | |
43 | enum afs_flock_mode { | |
44 | afs_flock_mode_unset, | |
45 | afs_flock_mode_local, /* Local locking only */ | |
46 | afs_flock_mode_openafs, /* Don't get server lock for a partial lock */ | |
47 | afs_flock_mode_strict, /* Always get a server lock for a partial lock */ | |
48 | afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */ | |
49 | }; | |
50 | ||
13fcc683 | 51 | struct afs_fs_context { |
00d3b7a4 | 52 | bool force; /* T to force cell type */ |
bec5eb61 | 53 | bool autocell; /* T if set auto mount operation */ |
4d673da1 | 54 | bool dyn_root; /* T if dynamic root */ |
13fcc683 | 55 | bool no_cell; /* T if the source is "none" (for dynroot) */ |
6c6c1d63 | 56 | enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */ |
00d3b7a4 | 57 | afs_voltype_t type; /* type of volume requested */ |
13fcc683 | 58 | unsigned int volnamesz; /* size of volume name */ |
00d3b7a4 | 59 | const char *volname; /* name of volume to mount */ |
5b86d4ff | 60 | struct afs_net *net; /* the AFS net namespace stuff */ |
00d3b7a4 DH |
61 | struct afs_cell *cell; /* cell in which to find volume */ |
62 | struct afs_volume *volume; /* volume record */ | |
63 | struct key *key; /* key to use for secure mounting */ | |
64 | }; | |
65 | ||
c435ee34 DH |
66 | struct afs_iget_data { |
67 | struct afs_fid fid; | |
68 | struct afs_volume *volume; /* volume on which resides */ | |
b8359153 DH |
69 | unsigned int cb_v_break; /* Pre-fetch volume break count */ |
70 | unsigned int cb_s_break; /* Pre-fetch server break count */ | |
c435ee34 DH |
71 | }; |
72 | ||
8e8d7f13 | 73 | enum afs_call_state { |
98bf40cd DH |
74 | AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ |
75 | AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ | |
76 | AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ | |
77 | AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ | |
78 | AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ | |
79 | AFS_CALL_SV_REPLYING, /* Server: Replying */ | |
80 | AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ | |
81 | AFS_CALL_COMPLETE, /* Completed or failed */ | |
8e8d7f13 | 82 | }; |
f044c884 | 83 | |
8b2a464c DH |
84 | /* |
85 | * List of server addresses. | |
86 | */ | |
87 | struct afs_addr_list { | |
88 | struct rcu_head rcu; /* Must be first */ | |
89 | refcount_t usage; | |
d2ddc776 | 90 | u32 version; /* Version */ |
68eb64c3 DH |
91 | unsigned char max_addrs; |
92 | unsigned char nr_addrs; | |
3bf0fb6f | 93 | unsigned char preferred; /* Preferred address */ |
68eb64c3 | 94 | unsigned char nr_ipv4; /* Number of IPv4 addresses */ |
0a5143f2 DH |
95 | enum dns_record_source source:8; |
96 | enum dns_lookup_status status:8; | |
bf99a53c | 97 | unsigned long probed; /* Mask of servers that have been probed */ |
3bf0fb6f DH |
98 | unsigned long failed; /* Mask of addrs that failed locally/ICMP */ |
99 | unsigned long responded; /* Mask of addrs that responded */ | |
8b2a464c | 100 | struct sockaddr_rxrpc addrs[]; |
68eb64c3 | 101 | #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8)) |
8b2a464c DH |
102 | }; |
103 | ||
08e0e7c8 DH |
104 | /* |
105 | * a record of an in-progress RxRPC call | |
106 | */ | |
107 | struct afs_call { | |
108 | const struct afs_call_type *type; /* type of call */ | |
3bf0fb6f | 109 | struct afs_addr_list *alist; /* Address is alist[addr_ix] */ |
08e0e7c8 | 110 | wait_queue_head_t waitq; /* processes awaiting completion */ |
341f741f | 111 | struct work_struct async_work; /* async I/O processor */ |
08e0e7c8 | 112 | struct work_struct work; /* actual work processor */ |
08e0e7c8 DH |
113 | struct rxrpc_call *rxcall; /* RxRPC call handle */ |
114 | struct key *key; /* security for this call */ | |
f044c884 | 115 | struct afs_net *net; /* The network namespace */ |
a6853b9c DH |
116 | struct afs_server *server; /* The fileserver record if fs op (pins ref) */ |
117 | struct afs_vlserver *vlserver; /* The vlserver record if vl op */ | |
d2ddc776 | 118 | struct afs_cb_interest *cbi; /* Callback interest for server used */ |
a58823ac | 119 | struct afs_vnode *lvnode; /* vnode being locked */ |
08e0e7c8 | 120 | void *request; /* request data (first part) */ |
4343d008 | 121 | struct address_space *mapping; /* Pages being written from */ |
12bdcf33 DH |
122 | struct iov_iter iter; /* Buffer iterator */ |
123 | struct iov_iter *_iter; /* Iterator currently in use */ | |
124 | union { /* Convenience for ->iter */ | |
125 | struct kvec kvec[1]; | |
126 | struct bio_vec bvec[1]; | |
127 | }; | |
08e0e7c8 | 128 | void *buffer; /* reply receive buffer */ |
ffba718e DH |
129 | union { |
130 | long ret0; /* Value to reply with instead of 0 */ | |
131 | struct afs_addr_list *ret_alist; | |
132 | struct afs_vldb_entry *ret_vldb; | |
133 | struct afs_acl *ret_acl; | |
134 | }; | |
135 | struct afs_fid *out_fid; | |
a58823ac | 136 | struct afs_status_cb *out_dir_scb; |
87182759 | 137 | struct afs_status_cb *out_scb; |
ffba718e DH |
138 | struct yfs_acl *out_yacl; |
139 | struct afs_volsync *out_volsync; | |
140 | struct afs_volume_status *out_volstatus; | |
141 | struct afs_read *read_request; | |
142 | unsigned int server_index; | |
31143d5d DH |
143 | pgoff_t first; /* first page in mapping to deal with */ |
144 | pgoff_t last; /* last page in mapping to deal with */ | |
341f741f | 145 | atomic_t usage; |
8e8d7f13 | 146 | enum afs_call_state state; |
98bf40cd | 147 | spinlock_t state_lock; |
08e0e7c8 | 148 | int error; /* error code */ |
d001648e | 149 | u32 abort_code; /* Remote abort ID or 0 */ |
3bf0fb6f | 150 | u32 epoch; |
94f699c9 | 151 | unsigned int max_lifespan; /* Maximum lifespan to set if not 0 */ |
08e0e7c8 DH |
152 | unsigned request_size; /* size of request data */ |
153 | unsigned reply_max; /* maximum size of reply */ | |
31143d5d | 154 | unsigned first_offset; /* offset into mapping[first] */ |
bcd89270 MD |
155 | union { |
156 | unsigned last_to; /* amount of mapping[last] */ | |
157 | unsigned count2; /* count used in unmarshalling */ | |
158 | }; | |
08e0e7c8 | 159 | unsigned char unmarshall; /* unmarshalling phase */ |
3bf0fb6f | 160 | unsigned char addr_ix; /* Address in ->alist */ |
08e0e7c8 | 161 | bool incoming; /* T if incoming call */ |
31143d5d | 162 | bool send_pages; /* T if data from mapping should be sent */ |
d001648e | 163 | bool need_attention; /* T if RxRPC poked us */ |
56ff9c83 | 164 | bool async; /* T if asynchronous */ |
a68f4a27 | 165 | bool upgrade; /* T to request service upgrade */ |
4571577f | 166 | bool have_reply_time; /* T if have got reply_time */ |
20b8391f | 167 | bool intr; /* T if interruptible */ |
bf99a53c | 168 | u16 service_id; /* Actual service ID (after upgrade) */ |
a25e21f0 | 169 | unsigned int debug_id; /* Trace ID */ |
50a2c953 | 170 | u32 operation_ID; /* operation ID for an incoming call */ |
08e0e7c8 | 171 | u32 count; /* count for use in unmarshalling */ |
12bdcf33 DH |
172 | union { /* place to extract temporary data */ |
173 | struct { | |
174 | __be32 tmp_u; | |
175 | __be32 tmp; | |
176 | } __attribute__((packed)); | |
177 | __be64 tmp64; | |
178 | }; | |
12d8e95a | 179 | ktime_t reply_time; /* Time of first reply packet */ |
08e0e7c8 DH |
180 | }; |
181 | ||
182 | struct afs_call_type { | |
00d3b7a4 | 183 | const char *name; |
025db80c | 184 | unsigned int op; /* Really enum afs_fs_operation */ |
00d3b7a4 | 185 | |
08e0e7c8 DH |
186 | /* deliver request or reply data to an call |
187 | * - returning an error will cause the call to be aborted | |
188 | */ | |
d001648e | 189 | int (*deliver)(struct afs_call *call); |
08e0e7c8 | 190 | |
08e0e7c8 DH |
191 | /* clean up a call */ |
192 | void (*destructor)(struct afs_call *call); | |
341f741f DH |
193 | |
194 | /* Work function */ | |
195 | void (*work)(struct work_struct *work); | |
3bf0fb6f DH |
196 | |
197 | /* Call done function (gets called immediately on success or failure) */ | |
198 | void (*done)(struct afs_call *call); | |
08e0e7c8 DH |
199 | }; |
200 | ||
4343d008 DH |
201 | /* |
202 | * Key available for writeback on a file. | |
203 | */ | |
204 | struct afs_wb_key { | |
205 | refcount_t usage; | |
206 | struct key *key; | |
207 | struct list_head vnode_link; /* Link in vnode->wb_keys */ | |
208 | }; | |
209 | ||
215804a9 DH |
210 | /* |
211 | * AFS open file information record. Pointed to by file->private_data. | |
212 | */ | |
213 | struct afs_file { | |
214 | struct key *key; /* The key this file was opened with */ | |
4343d008 | 215 | struct afs_wb_key *wb; /* Writeback key record for this file */ |
215804a9 DH |
216 | }; |
217 | ||
218 | static inline struct key *afs_file_key(struct file *file) | |
219 | { | |
220 | struct afs_file *af = file->private_data; | |
221 | ||
222 | return af->key; | |
223 | } | |
224 | ||
196ee9cd DH |
225 | /* |
226 | * Record of an outstanding read operation on a vnode. | |
227 | */ | |
228 | struct afs_read { | |
229 | loff_t pos; /* Where to start reading */ | |
e8e581a8 | 230 | loff_t len; /* How much we're asking for */ |
196ee9cd | 231 | loff_t actual_len; /* How much we're actually getting */ |
6a0e3999 | 232 | loff_t remain; /* Amount remaining */ |
f3ddee8d DH |
233 | loff_t file_size; /* File size returned by server */ |
234 | afs_dataversion_t data_version; /* Version number returned by server */ | |
235 | refcount_t usage; | |
196ee9cd | 236 | unsigned int index; /* Which page we're reading into */ |
196ee9cd | 237 | unsigned int nr_pages; |
12bdcf33 | 238 | unsigned int offset; /* offset into current page */ |
a58823ac DH |
239 | struct afs_vnode *vnode; |
240 | void (*page_done)(struct afs_read *); | |
f3ddee8d DH |
241 | struct page **pages; |
242 | struct page *array[]; | |
196ee9cd DH |
243 | }; |
244 | ||
08e0e7c8 DH |
245 | /* |
246 | * AFS superblock private data | |
247 | * - there's one superblock per volume | |
248 | */ | |
249 | struct afs_super_info { | |
5b86d4ff | 250 | struct net *net_ns; /* Network namespace */ |
49566f6f | 251 | struct afs_cell *cell; /* The cell in which the volume resides */ |
08e0e7c8 | 252 | struct afs_volume *volume; /* volume record */ |
6c6c1d63 | 253 | enum afs_flock_mode flock_mode:8; /* File locking emulation mode */ |
4d673da1 | 254 | bool dyn_root; /* True if dynamic root */ |
08e0e7c8 | 255 | }; |
1da177e4 | 256 | |
08e0e7c8 DH |
257 | static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
258 | { | |
259 | return sb->s_fs_info; | |
1da177e4 LT |
260 | } |
261 | ||
08e0e7c8 DH |
262 | extern struct file_system_type afs_fs_type; |
263 | ||
6f8880d8 DH |
264 | /* |
265 | * Set of substitutes for @sys. | |
266 | */ | |
267 | struct afs_sysnames { | |
268 | #define AFS_NR_SYSNAME 16 | |
269 | char *subs[AFS_NR_SYSNAME]; | |
270 | refcount_t usage; | |
271 | unsigned short nr; | |
6f8880d8 DH |
272 | char blank[1]; |
273 | }; | |
274 | ||
f044c884 DH |
275 | /* |
276 | * AFS network namespace record. | |
277 | */ | |
278 | struct afs_net { | |
5b86d4ff | 279 | struct net *net; /* Backpointer to the owning net namespace */ |
f044c884 DH |
280 | struct afs_uuid uuid; |
281 | bool live; /* F if this namespace is being removed */ | |
282 | ||
283 | /* AF_RXRPC I/O stuff */ | |
284 | struct socket *socket; | |
285 | struct afs_call *spare_incoming_call; | |
286 | struct work_struct charge_preallocation_work; | |
287 | struct mutex socket_mutex; | |
288 | atomic_t nr_outstanding_calls; | |
289 | atomic_t nr_superblocks; | |
290 | ||
291 | /* Cell database */ | |
989782dc | 292 | struct rb_root cells; |
1588def9 | 293 | struct afs_cell __rcu *ws_cell; |
989782dc DH |
294 | struct work_struct cells_manager; |
295 | struct timer_list cells_timer; | |
296 | atomic_t cells_outstanding; | |
297 | seqlock_t cells_lock; | |
f044c884 | 298 | |
0da0b7fd | 299 | struct mutex proc_cells_lock; |
6b3944e4 | 300 | struct hlist_head proc_cells; |
f044c884 | 301 | |
d2ddc776 DH |
302 | /* Known servers. Theoretically each fileserver can only be in one |
303 | * cell, but in practice, people create aliases and subsets and there's | |
304 | * no easy way to distinguish them. | |
305 | */ | |
306 | seqlock_t fs_lock; /* For fs_servers */ | |
307 | struct rb_root fs_servers; /* afs_server (by server UUID or address) */ | |
308 | struct list_head fs_updates; /* afs_server (by update_at) */ | |
309 | struct hlist_head fs_proc; /* procfs servers list */ | |
f044c884 | 310 | |
d2ddc776 DH |
311 | struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ |
312 | struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */ | |
313 | seqlock_t fs_addr_lock; /* For fs_addresses[46] */ | |
f044c884 | 314 | |
d2ddc776 DH |
315 | struct work_struct fs_manager; |
316 | struct timer_list fs_timer; | |
59fa1c4a | 317 | atomic_t servers_outstanding; |
f044c884 | 318 | |
d2ddc776 DH |
319 | /* File locking renewal management */ |
320 | struct mutex lock_manager_mutex; | |
321 | ||
f044c884 | 322 | /* Misc */ |
0da0b7fd | 323 | struct super_block *dynroot_sb; /* Dynamic root mount superblock */ |
d55b4da4 | 324 | struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ |
6f8880d8 DH |
325 | struct afs_sysnames *sysnames; |
326 | rwlock_t sysnames_lock; | |
d55b4da4 DH |
327 | |
328 | /* Statistics counters */ | |
329 | atomic_t n_lookup; /* Number of lookups done */ | |
330 | atomic_t n_reval; /* Number of dentries needing revalidation */ | |
331 | atomic_t n_inval; /* Number of invalidations by the server */ | |
f3ddee8d | 332 | atomic_t n_relpg; /* Number of invalidations by releasepage */ |
d55b4da4 | 333 | atomic_t n_read_dir; /* Number of directory pages read */ |
63a4681f DH |
334 | atomic_t n_dir_cr; /* Number of directory entry creation edits */ |
335 | atomic_t n_dir_rm; /* Number of directory entry removal edits */ | |
76a5cb6f DH |
336 | atomic_t n_stores; /* Number of store ops */ |
337 | atomic_long_t n_store_bytes; /* Number of bytes stored */ | |
338 | atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ | |
339 | atomic_t n_fetches; /* Number of data fetch ops */ | |
f044c884 DH |
340 | }; |
341 | ||
6f8880d8 | 342 | extern const char afs_init_sysname[]; |
f044c884 | 343 | |
989782dc DH |
344 | enum afs_cell_state { |
345 | AFS_CELL_UNSET, | |
346 | AFS_CELL_ACTIVATING, | |
347 | AFS_CELL_ACTIVE, | |
348 | AFS_CELL_DEACTIVATING, | |
349 | AFS_CELL_INACTIVE, | |
350 | AFS_CELL_FAILED, | |
351 | }; | |
352 | ||
08e0e7c8 | 353 | /* |
d2ddc776 DH |
354 | * AFS cell record. |
355 | * | |
356 | * This is a tricky concept to get right as it is possible to create aliases | |
357 | * simply by pointing AFSDB/SRV records for two names at the same set of VL | |
358 | * servers; it is also possible to do things like setting up two sets of VL | |
359 | * servers, one of which provides a superset of the volumes provided by the | |
360 | * other (for internal/external division, for example). | |
361 | * | |
362 | * Cells only exist in the sense that (a) a cell's name maps to a set of VL | |
363 | * servers and (b) a cell's name is used by the client to select the key to use | |
364 | * for authentication and encryption. The cell name is not typically used in | |
365 | * the protocol. | |
366 | * | |
367 | * There is no easy way to determine if two cells are aliases or one is a | |
368 | * subset of another. | |
08e0e7c8 DH |
369 | */ |
370 | struct afs_cell { | |
989782dc DH |
371 | union { |
372 | struct rcu_head rcu; | |
373 | struct rb_node net_node; /* Node in net->cells */ | |
374 | }; | |
375 | struct afs_net *net; | |
00d3b7a4 | 376 | struct key *anonymous_key; /* anonymous user key for this cell */ |
989782dc | 377 | struct work_struct manager; /* Manager for init/deinit/dns */ |
6b3944e4 | 378 | struct hlist_node proc_link; /* /proc cell list link */ |
9b3f26c9 DH |
379 | #ifdef CONFIG_AFS_FSCACHE |
380 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 381 | #endif |
989782dc DH |
382 | time64_t dns_expiry; /* Time AFSDB/SRV record expires */ |
383 | time64_t last_inactive; /* Time of last drop of usage count */ | |
384 | atomic_t usage; | |
385 | unsigned long flags; | |
d5c32c89 DH |
386 | #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */ |
387 | #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */ | |
989782dc DH |
388 | enum afs_cell_state state; |
389 | short error; | |
d5c32c89 DH |
390 | enum dns_record_source dns_source:8; /* Latest source of data from lookup */ |
391 | enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */ | |
392 | unsigned int dns_lookup_count; /* Counter of DNS lookups */ | |
989782dc | 393 | |
d2ddc776 DH |
394 | /* Active fileserver interaction state. */ |
395 | struct list_head proc_volumes; /* procfs volume list */ | |
396 | rwlock_t proc_lock; | |
989782dc | 397 | |
d2ddc776 | 398 | /* VL server list. */ |
0a5143f2 DH |
399 | rwlock_t vl_servers_lock; /* Lock on vl_servers */ |
400 | struct afs_vlserver_list __rcu *vl_servers; | |
401 | ||
989782dc DH |
402 | u8 name_len; /* Length of name */ |
403 | char name[64 + 1]; /* Cell name, case-flattened and NUL-padded */ | |
08e0e7c8 DH |
404 | }; |
405 | ||
0a5143f2 DH |
406 | /* |
407 | * Volume Location server record. | |
408 | */ | |
409 | struct afs_vlserver { | |
410 | struct rcu_head rcu; | |
411 | struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */ | |
412 | unsigned long flags; | |
413 | #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ | |
414 | #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ | |
3bf0fb6f | 415 | #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ |
0a5143f2 DH |
416 | rwlock_t lock; /* Lock on addresses */ |
417 | atomic_t usage; | |
3bf0fb6f DH |
418 | |
419 | /* Probe state */ | |
420 | wait_queue_head_t probe_wq; | |
421 | atomic_t probe_outstanding; | |
422 | spinlock_t probe_lock; | |
423 | struct { | |
424 | unsigned int rtt; /* RTT as ktime/64 */ | |
425 | u32 abort_code; | |
426 | short error; | |
427 | bool have_result; | |
428 | bool responded:1; | |
429 | bool is_yfs:1; | |
430 | bool not_yfs:1; | |
431 | bool local_failure:1; | |
432 | } probe; | |
433 | ||
0a5143f2 | 434 | u16 port; |
3bf0fb6f | 435 | u16 name_len; /* Length of name */ |
0a5143f2 DH |
436 | char name[]; /* Server name, case-flattened */ |
437 | }; | |
438 | ||
439 | /* | |
440 | * Weighted list of Volume Location servers. | |
441 | */ | |
442 | struct afs_vlserver_entry { | |
443 | u16 priority; /* Preference (as SRV) */ | |
444 | u16 weight; /* Weight (as SRV) */ | |
445 | enum dns_record_source source:8; | |
446 | enum dns_lookup_status status:8; | |
447 | struct afs_vlserver *server; | |
448 | }; | |
449 | ||
450 | struct afs_vlserver_list { | |
451 | struct rcu_head rcu; | |
452 | atomic_t usage; | |
453 | u8 nr_servers; | |
454 | u8 index; /* Server currently in use */ | |
3bf0fb6f | 455 | u8 preferred; /* Preferred server */ |
0a5143f2 DH |
456 | enum dns_record_source source:8; |
457 | enum dns_lookup_status status:8; | |
458 | rwlock_t lock; | |
459 | struct afs_vlserver_entry servers[]; | |
460 | }; | |
461 | ||
08e0e7c8 | 462 | /* |
d2ddc776 DH |
463 | * Cached VLDB entry. |
464 | * | |
465 | * This is pointed to by cell->vldb_entries, indexed by name. | |
08e0e7c8 | 466 | */ |
d2ddc776 DH |
467 | struct afs_vldb_entry { |
468 | afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ | |
00d3b7a4 | 469 | |
d2ddc776 DH |
470 | unsigned long flags; |
471 | #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ | |
472 | #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ | |
473 | #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ | |
474 | #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ | |
475 | #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ | |
476 | ||
477 | uuid_t fs_server[AFS_NMAXNSERVERS]; | |
478 | u8 fs_mask[AFS_NMAXNSERVERS]; | |
08e0e7c8 DH |
479 | #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ |
480 | #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ | |
481 | #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ | |
d2ddc776 DH |
482 | short error; |
483 | u8 nr_servers; /* Number of server records */ | |
484 | u8 name_len; | |
485 | u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ | |
08e0e7c8 DH |
486 | }; |
487 | ||
488 | /* | |
d2ddc776 | 489 | * Record of fileserver with which we're actively communicating. |
08e0e7c8 DH |
490 | */ |
491 | struct afs_server { | |
d2ddc776 DH |
492 | struct rcu_head rcu; |
493 | union { | |
494 | uuid_t uuid; /* Server ID */ | |
495 | struct afs_uuid _uuid; | |
496 | }; | |
497 | ||
498 | struct afs_addr_list __rcu *addresses; | |
499 | struct rb_node uuid_rb; /* Link in net->servers */ | |
500 | struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ | |
501 | struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ | |
502 | struct hlist_node proc_link; /* Link in net->fs_proc */ | |
503 | struct afs_server *gc_next; /* Next server in manager's list */ | |
504 | time64_t put_time; /* Time at which last put */ | |
505 | time64_t update_at; /* Time at which to next update the record */ | |
c435ee34 | 506 | unsigned long flags; |
d2ddc776 DH |
507 | #define AFS_SERVER_FL_NOT_READY 1 /* The record is not ready for use */ |
508 | #define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */ | |
509 | #define AFS_SERVER_FL_VL_FAIL 3 /* Failed to access VL server */ | |
510 | #define AFS_SERVER_FL_UPDATING 4 | |
511 | #define AFS_SERVER_FL_PROBED 5 /* The fileserver has been probed */ | |
512 | #define AFS_SERVER_FL_PROBING 6 /* Fileserver is being probed */ | |
5cf9dd55 | 513 | #define AFS_SERVER_FL_NO_IBULK 7 /* Fileserver doesn't support FS.InlineBulkStatus */ |
f2686b09 | 514 | #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ |
30062bd1 DH |
515 | #define AFS_SERVER_FL_IS_YFS 9 /* Server is YFS not AFS */ |
516 | #define AFS_SERVER_FL_NO_RM2 10 /* Fileserver doesn't support YFS.RemoveFile2 */ | |
3bf0fb6f | 517 | #define AFS_SERVER_FL_HAVE_EPOCH 11 /* ->epoch is valid */ |
d2ddc776 DH |
518 | atomic_t usage; |
519 | u32 addr_version; /* Address list version */ | |
3bf0fb6f | 520 | u32 cm_epoch; /* Server RxRPC epoch */ |
08e0e7c8 DH |
521 | |
522 | /* file service access */ | |
d2ddc776 | 523 | rwlock_t fs_lock; /* access lock */ |
08e0e7c8 DH |
524 | |
525 | /* callback promise management */ | |
47ea0f2e | 526 | struct hlist_head cb_volumes; /* List of volume interests on this server */ |
c435ee34 DH |
527 | unsigned cb_s_break; /* Break-everything counter. */ |
528 | rwlock_t cb_break_lock; /* Volume finding lock */ | |
3bf0fb6f DH |
529 | |
530 | /* Probe state */ | |
531 | wait_queue_head_t probe_wq; | |
532 | atomic_t probe_outstanding; | |
533 | spinlock_t probe_lock; | |
534 | struct { | |
535 | unsigned int rtt; /* RTT as ktime/64 */ | |
536 | u32 abort_code; | |
537 | u32 cm_epoch; | |
538 | short error; | |
539 | bool have_result; | |
540 | bool responded:1; | |
541 | bool is_yfs:1; | |
542 | bool not_yfs:1; | |
543 | bool local_failure:1; | |
544 | bool no_epoch:1; | |
545 | bool cm_probed:1; | |
546 | bool said_rebooted:1; | |
547 | bool said_inconsistent:1; | |
548 | } probe; | |
c435ee34 DH |
549 | }; |
550 | ||
47ea0f2e DH |
551 | /* |
552 | * Volume collation in the server's callback interest list. | |
553 | */ | |
554 | struct afs_vol_interest { | |
555 | struct hlist_node srv_link; /* Link in server->cb_volumes */ | |
556 | struct hlist_head cb_interests; /* List of callback interests on the server */ | |
f642404a DH |
557 | union { |
558 | struct rcu_head rcu; | |
559 | afs_volid_t vid; /* Volume ID to match */ | |
560 | }; | |
47ea0f2e DH |
561 | unsigned int usage; |
562 | }; | |
563 | ||
c435ee34 DH |
564 | /* |
565 | * Interest by a superblock on a server. | |
566 | */ | |
567 | struct afs_cb_interest { | |
47ea0f2e DH |
568 | struct hlist_node cb_vlink; /* Link in vol_interest->cb_interests */ |
569 | struct afs_vol_interest *vol_interest; | |
c435ee34 DH |
570 | struct afs_server *server; /* Server on which this interest resides */ |
571 | struct super_block *sb; /* Superblock on which inodes reside */ | |
f642404a DH |
572 | union { |
573 | struct rcu_head rcu; | |
574 | afs_volid_t vid; /* Volume ID to match */ | |
575 | }; | |
c435ee34 | 576 | refcount_t usage; |
08e0e7c8 DH |
577 | }; |
578 | ||
579 | /* | |
d2ddc776 DH |
580 | * Replaceable server list. |
581 | */ | |
582 | struct afs_server_entry { | |
583 | struct afs_server *server; | |
584 | struct afs_cb_interest *cb_interest; | |
585 | }; | |
586 | ||
587 | struct afs_server_list { | |
588 | refcount_t usage; | |
3bf0fb6f DH |
589 | unsigned char nr_servers; |
590 | unsigned char preferred; /* Preferred server */ | |
d2ddc776 DH |
591 | unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ |
592 | unsigned int seq; /* Set to ->servers_seq when installed */ | |
d4a96bec | 593 | rwlock_t lock; |
d2ddc776 DH |
594 | struct afs_server_entry servers[]; |
595 | }; | |
596 | ||
597 | /* | |
598 | * Live AFS volume management. | |
08e0e7c8 DH |
599 | */ |
600 | struct afs_volume { | |
d2ddc776 | 601 | afs_volid_t vid; /* volume ID */ |
08e0e7c8 | 602 | atomic_t usage; |
d2ddc776 DH |
603 | time64_t update_at; /* Time at which to next update */ |
604 | struct afs_cell *cell; /* Cell to which belongs (pins ref) */ | |
605 | struct list_head proc_link; /* Link in cell->vl_proc */ | |
606 | unsigned long flags; | |
607 | #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ | |
608 | #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ | |
609 | #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ | |
610 | #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ | |
611 | #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ | |
612 | #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ | |
9b3f26c9 DH |
613 | #ifdef CONFIG_AFS_FSCACHE |
614 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 615 | #endif |
d2ddc776 DH |
616 | struct afs_server_list *servers; /* List of servers on which volume resides */ |
617 | rwlock_t servers_lock; /* Lock for ->servers */ | |
618 | unsigned int servers_seq; /* Incremented each time ->servers changes */ | |
619 | ||
68251f0a DH |
620 | unsigned cb_v_break; /* Break-everything counter. */ |
621 | rwlock_t cb_break_lock; | |
622 | ||
08e0e7c8 | 623 | afs_voltype_t type; /* type of volume */ |
d2ddc776 | 624 | short error; |
08e0e7c8 | 625 | char type_force; /* force volume type (suppress R/O -> R/W) */ |
d2ddc776 DH |
626 | u8 name_len; |
627 | u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ | |
08e0e7c8 DH |
628 | }; |
629 | ||
0fafdc9f DH |
630 | enum afs_lock_state { |
631 | AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ | |
632 | AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ | |
633 | AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ | |
634 | AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ | |
635 | AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ | |
636 | AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ | |
637 | AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ | |
cdfb26b4 | 638 | AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */ |
0fafdc9f DH |
639 | }; |
640 | ||
08e0e7c8 | 641 | /* |
f8de483e DH |
642 | * AFS inode private data. |
643 | * | |
644 | * Note that afs_alloc_inode() *must* reset anything that could incorrectly | |
645 | * leak from one inode to another. | |
08e0e7c8 DH |
646 | */ |
647 | struct afs_vnode { | |
648 | struct inode vfs_inode; /* the VFS's inode record */ | |
649 | ||
650 | struct afs_volume *volume; /* volume on which vnode resides */ | |
08e0e7c8 DH |
651 | struct afs_fid fid; /* the file identifier for this inode */ |
652 | struct afs_file_status status; /* AFS status info for this file */ | |
a4ff7401 | 653 | afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ |
9b3f26c9 DH |
654 | #ifdef CONFIG_AFS_FSCACHE |
655 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 656 | #endif |
fe342cf7 | 657 | struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ |
d2ddc776 | 658 | struct mutex io_lock; /* Lock for serialising I/O on this mutex */ |
b61f7dcf | 659 | struct rw_semaphore validate_lock; /* lock for validating this vnode */ |
79ddbfa5 DH |
660 | struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ |
661 | struct key *silly_key; /* Silly rename key */ | |
4343d008 | 662 | spinlock_t wb_lock; /* lock for wb_keys */ |
08e0e7c8 DH |
663 | spinlock_t lock; /* waitqueue/flags lock */ |
664 | unsigned long flags; | |
c435ee34 | 665 | #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ |
260a9803 | 666 | #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
f3ddee8d | 667 | #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ |
08e0e7c8 DH |
668 | #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ |
669 | #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ | |
670 | #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ | |
0fafdc9f DH |
671 | #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ |
672 | #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ | |
5a813276 | 673 | #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ |
08e0e7c8 | 674 | |
4343d008 | 675 | struct list_head wb_keys; /* List of keys available for writeback */ |
e8d6c554 DH |
676 | struct list_head pending_locks; /* locks waiting to be granted */ |
677 | struct list_head granted_locks; /* locks granted on this file */ | |
678 | struct delayed_work lock_work; /* work to be done in locking */ | |
0fafdc9f | 679 | struct key *lock_key; /* Key to be used in lock ops */ |
a690f60a | 680 | ktime_t locked_at; /* Time at which lock obtained */ |
0fafdc9f DH |
681 | enum afs_lock_state lock_state : 8; |
682 | afs_lock_type_t lock_type : 8; | |
31143d5d | 683 | |
08e0e7c8 | 684 | /* outstanding callback notification on this file */ |
f642404a | 685 | struct afs_cb_interest __rcu *cb_interest; /* Server on which this resides */ |
c435ee34 | 686 | unsigned int cb_s_break; /* Mass break counter on ->server */ |
68251f0a | 687 | unsigned int cb_v_break; /* Mass break counter on ->volume */ |
c435ee34 DH |
688 | unsigned int cb_break; /* Break counter on vnode */ |
689 | seqlock_t cb_lock; /* Lock for ->cb_interest, ->status, ->cb_*break */ | |
690 | ||
691 | time64_t cb_expires_at; /* time at which callback expires */ | |
08e0e7c8 DH |
692 | }; |
693 | ||
12bdcf33 DH |
694 | static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) |
695 | { | |
696 | #ifdef CONFIG_AFS_FSCACHE | |
697 | return vnode->cache; | |
698 | #else | |
699 | return NULL; | |
700 | #endif | |
701 | } | |
702 | ||
00d3b7a4 DH |
703 | /* |
704 | * cached security record for one user's attempt to access a vnode | |
705 | */ | |
706 | struct afs_permit { | |
707 | struct key *key; /* RxRPC ticket holding a security context */ | |
be080a6f | 708 | afs_access_t access; /* CallerAccess value for this key */ |
00d3b7a4 DH |
709 | }; |
710 | ||
711 | /* | |
be080a6f DH |
712 | * Immutable cache of CallerAccess records from attempts to access vnodes. |
713 | * These may be shared between multiple vnodes. | |
00d3b7a4 DH |
714 | */ |
715 | struct afs_permits { | |
be080a6f DH |
716 | struct rcu_head rcu; |
717 | struct hlist_node hash_node; /* Link in hash */ | |
718 | unsigned long h; /* Hash value for this permit list */ | |
719 | refcount_t usage; | |
720 | unsigned short nr_permits; /* Number of records */ | |
721 | bool invalidated; /* Invalidated due to key change */ | |
722 | struct afs_permit permits[]; /* List of permits sorted by key pointer */ | |
00d3b7a4 DH |
723 | }; |
724 | ||
b908fe6b DH |
725 | /* |
726 | * record of one of a system's set of network interfaces | |
727 | */ | |
728 | struct afs_interface { | |
b908fe6b DH |
729 | struct in_addr address; /* IPv4 address bound to interface */ |
730 | struct in_addr netmask; /* netmask applied to address */ | |
731 | unsigned mtu; /* MTU of interface */ | |
732 | }; | |
733 | ||
4584ae96 DH |
734 | /* |
735 | * Error prioritisation and accumulation. | |
736 | */ | |
737 | struct afs_error { | |
738 | short error; /* Accumulated error */ | |
739 | bool responded; /* T if server responded */ | |
740 | }; | |
741 | ||
8b2a464c DH |
742 | /* |
743 | * Cursor for iterating over a server's address list. | |
744 | */ | |
745 | struct afs_addr_cursor { | |
746 | struct afs_addr_list *alist; /* Current address list (pins ref) */ | |
3bf0fb6f DH |
747 | unsigned long tried; /* Tried addresses */ |
748 | signed char index; /* Current address */ | |
8b2a464c | 749 | bool responded; /* T if the current address responded */ |
744bcd71 | 750 | unsigned short nr_iterations; /* Number of address iterations */ |
3bf0fb6f DH |
751 | short error; |
752 | u32 abort_code; | |
8b2a464c DH |
753 | }; |
754 | ||
0a5143f2 DH |
755 | /* |
756 | * Cursor for iterating over a set of volume location servers. | |
757 | */ | |
758 | struct afs_vl_cursor { | |
759 | struct afs_addr_cursor ac; | |
760 | struct afs_cell *cell; /* The cell we're querying */ | |
761 | struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ | |
3bf0fb6f | 762 | struct afs_vlserver *server; /* Server on which this resides */ |
0a5143f2 | 763 | struct key *key; /* Key for the server */ |
3bf0fb6f DH |
764 | unsigned long untried; /* Bitmask of untried servers */ |
765 | short index; /* Current server */ | |
0a5143f2 DH |
766 | short error; |
767 | unsigned short flags; | |
768 | #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ | |
769 | #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ | |
770 | #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ | |
744bcd71 | 771 | unsigned short nr_iterations; /* Number of server iterations */ |
0a5143f2 DH |
772 | }; |
773 | ||
8b2a464c DH |
774 | /* |
775 | * Cursor for iterating over a set of fileservers. | |
776 | */ | |
777 | struct afs_fs_cursor { | |
a58823ac | 778 | const struct afs_call_type *type; /* Type of call done */ |
8b2a464c | 779 | struct afs_addr_cursor ac; |
d2ddc776 DH |
780 | struct afs_vnode *vnode; |
781 | struct afs_server_list *server_list; /* Current server list (pins ref) */ | |
782 | struct afs_cb_interest *cbi; /* Server on which this resides (pins ref) */ | |
783 | struct key *key; /* Key for the server */ | |
3bf0fb6f | 784 | unsigned long untried; /* Bitmask of untried servers */ |
d2ddc776 DH |
785 | unsigned int cb_break; /* cb_break + cb_s_break before the call */ |
786 | unsigned int cb_break_2; /* cb_break + cb_s_break (2nd vnode) */ | |
3bf0fb6f | 787 | short index; /* Current server */ |
e7f680f4 | 788 | short error; |
d2ddc776 DH |
789 | unsigned short flags; |
790 | #define AFS_FS_CURSOR_STOP 0x0001 /* Set to cease iteration */ | |
791 | #define AFS_FS_CURSOR_VBUSY 0x0002 /* Set if seen VBUSY */ | |
792 | #define AFS_FS_CURSOR_VMOVED 0x0004 /* Set if seen VMOVED */ | |
793 | #define AFS_FS_CURSOR_VNOVOL 0x0008 /* Set if seen VNOVOL */ | |
794 | #define AFS_FS_CURSOR_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ | |
795 | #define AFS_FS_CURSOR_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ | |
20b8391f | 796 | #define AFS_FS_CURSOR_INTR 0x0040 /* Set if op is interruptible */ |
744bcd71 | 797 | unsigned short nr_iterations; /* Number of server iterations */ |
8b2a464c DH |
798 | }; |
799 | ||
402cb8dd DH |
800 | /* |
801 | * Cache auxiliary data. | |
802 | */ | |
803 | struct afs_vnode_cache_aux { | |
804 | u64 data_version; | |
805 | } __packed; | |
806 | ||
98bf40cd DH |
807 | #include <trace/events/afs.h> |
808 | ||
08e0e7c8 | 809 | /*****************************************************************************/ |
8b2a464c DH |
810 | /* |
811 | * addr_list.c | |
812 | */ | |
813 | static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) | |
814 | { | |
815 | if (alist) | |
816 | refcount_inc(&alist->usage); | |
817 | return alist; | |
818 | } | |
819 | extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, | |
820 | unsigned short, | |
821 | unsigned short); | |
822 | extern void afs_put_addrlist(struct afs_addr_list *); | |
0a5143f2 DH |
823 | extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, |
824 | const char *, size_t, char, | |
825 | unsigned short, unsigned short); | |
826 | extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); | |
8b2a464c DH |
827 | extern bool afs_iterate_addresses(struct afs_addr_cursor *); |
828 | extern int afs_end_cursor(struct afs_addr_cursor *); | |
8b2a464c | 829 | |
bf99a53c DH |
830 | extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); |
831 | extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); | |
d2ddc776 | 832 | |
9b3f26c9 DH |
833 | /* |
834 | * cache.c | |
835 | */ | |
836 | #ifdef CONFIG_AFS_FSCACHE | |
837 | extern struct fscache_netfs afs_cache_netfs; | |
838 | extern struct fscache_cookie_def afs_cell_cache_index_def; | |
9b3f26c9 DH |
839 | extern struct fscache_cookie_def afs_volume_cache_index_def; |
840 | extern struct fscache_cookie_def afs_vnode_cache_index_def; | |
841 | #else | |
842 | #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
9b3f26c9 DH |
843 | #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) |
844 | #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
845 | #endif | |
846 | ||
08e0e7c8 DH |
847 | /* |
848 | * callback.c | |
849 | */ | |
850 | extern void afs_init_callback_state(struct afs_server *); | |
30062bd1 | 851 | extern void __afs_break_callback(struct afs_vnode *); |
c435ee34 | 852 | extern void afs_break_callback(struct afs_vnode *); |
5cf9dd55 | 853 | extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break*); |
c435ee34 | 854 | |
d4a96bec DH |
855 | extern int afs_register_server_cb_interest(struct afs_vnode *, |
856 | struct afs_server_list *, unsigned int); | |
c435ee34 | 857 | extern void afs_put_cb_interest(struct afs_net *, struct afs_cb_interest *); |
d2ddc776 | 858 | extern void afs_clear_callback_interests(struct afs_net *, struct afs_server_list *); |
c435ee34 DH |
859 | |
860 | static inline struct afs_cb_interest *afs_get_cb_interest(struct afs_cb_interest *cbi) | |
861 | { | |
d4a96bec DH |
862 | if (cbi) |
863 | refcount_inc(&cbi->usage); | |
c435ee34 DH |
864 | return cbi; |
865 | } | |
08e0e7c8 | 866 | |
68251f0a DH |
867 | static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) |
868 | { | |
eeba1e9c | 869 | return vnode->cb_break + vnode->cb_v_break; |
68251f0a DH |
870 | } |
871 | ||
18ac6185 DH |
872 | static inline bool afs_cb_is_broken(unsigned int cb_break, |
873 | const struct afs_vnode *vnode, | |
874 | const struct afs_cb_interest *cbi) | |
68251f0a | 875 | { |
18ac6185 | 876 | return !cbi || cb_break != (vnode->cb_break + |
18ac6185 | 877 | vnode->volume->cb_v_break); |
68251f0a DH |
878 | } |
879 | ||
1da177e4 LT |
880 | /* |
881 | * cell.c | |
882 | */ | |
989782dc DH |
883 | extern int afs_cell_init(struct afs_net *, const char *); |
884 | extern struct afs_cell *afs_lookup_cell_rcu(struct afs_net *, const char *, unsigned); | |
885 | extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, | |
886 | const char *, bool); | |
8b2a464c | 887 | extern struct afs_cell *afs_get_cell(struct afs_cell *); |
9ed900b1 | 888 | extern void afs_put_cell(struct afs_net *, struct afs_cell *); |
989782dc DH |
889 | extern void afs_manage_cells(struct work_struct *); |
890 | extern void afs_cells_timer(struct timer_list *); | |
f044c884 | 891 | extern void __net_exit afs_cell_purge(struct afs_net *); |
08e0e7c8 DH |
892 | |
893 | /* | |
894 | * cmservice.c | |
895 | */ | |
896 | extern bool afs_cm_incoming_call(struct afs_call *); | |
897 | ||
1da177e4 LT |
898 | /* |
899 | * dir.c | |
900 | */ | |
4d673da1 | 901 | extern const struct file_operations afs_dir_file_operations; |
754661f1 | 902 | extern const struct inode_operations afs_dir_inode_operations; |
f3ddee8d | 903 | extern const struct address_space_operations afs_dir_aops; |
d61dcce2 | 904 | extern const struct dentry_operations afs_fs_dentry_operations; |
4d673da1 | 905 | |
66c7e1d3 DH |
906 | extern void afs_d_release(struct dentry *); |
907 | ||
63a4681f DH |
908 | /* |
909 | * dir_edit.c | |
910 | */ | |
911 | extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, | |
912 | enum afs_edit_dir_reason); | |
913 | extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); | |
914 | ||
79ddbfa5 DH |
915 | /* |
916 | * dir_silly.c | |
917 | */ | |
918 | extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, | |
919 | struct dentry *, struct key *); | |
920 | extern int afs_silly_iput(struct dentry *, struct inode *); | |
921 | ||
66c7e1d3 DH |
922 | /* |
923 | * dynroot.c | |
924 | */ | |
925 | extern const struct file_operations afs_dynroot_file_operations; | |
926 | extern const struct inode_operations afs_dynroot_inode_operations; | |
927 | extern const struct dentry_operations afs_dynroot_dentry_operations; | |
928 | ||
929 | extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); | |
0da0b7fd DH |
930 | extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); |
931 | extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); | |
932 | extern int afs_dynroot_populate(struct super_block *); | |
933 | extern void afs_dynroot_depopulate(struct super_block *); | |
1da177e4 LT |
934 | |
935 | /* | |
936 | * file.c | |
937 | */ | |
f5e54d6e | 938 | extern const struct address_space_operations afs_fs_aops; |
754661f1 | 939 | extern const struct inode_operations afs_file_inode_operations; |
00d3b7a4 DH |
940 | extern const struct file_operations afs_file_operations; |
941 | ||
4343d008 DH |
942 | extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); |
943 | extern void afs_put_wb_key(struct afs_wb_key *); | |
00d3b7a4 DH |
944 | extern int afs_open(struct inode *, struct file *); |
945 | extern int afs_release(struct inode *, struct file *); | |
d2ddc776 | 946 | extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *); |
f6d335c0 | 947 | extern int afs_page_filler(void *, struct page *); |
196ee9cd | 948 | extern void afs_put_read(struct afs_read *); |
1da177e4 | 949 | |
e8d6c554 DH |
950 | /* |
951 | * flock.c | |
952 | */ | |
f044c884 DH |
953 | extern struct workqueue_struct *afs_lock_manager; |
954 | ||
a690f60a | 955 | extern void afs_lock_op_done(struct afs_call *); |
e8d6c554 DH |
956 | extern void afs_lock_work(struct work_struct *); |
957 | extern void afs_lock_may_be_available(struct afs_vnode *); | |
958 | extern int afs_lock(struct file *, int, struct file_lock *); | |
959 | extern int afs_flock(struct file *, int, struct file_lock *); | |
960 | ||
08e0e7c8 DH |
961 | /* |
962 | * fsclient.c | |
963 | */ | |
a58823ac DH |
964 | extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_status_cb *, |
965 | struct afs_volsync *); | |
d2ddc776 | 966 | extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *); |
a58823ac DH |
967 | extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_status_cb *, struct afs_read *); |
968 | extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t, | |
969 | struct afs_status_cb *, struct afs_fid *, struct afs_status_cb *); | |
970 | extern int afs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool, | |
971 | struct afs_status_cb *); | |
972 | extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, | |
973 | struct afs_status_cb *, struct afs_status_cb *); | |
974 | extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, | |
975 | struct afs_status_cb *, struct afs_fid *, struct afs_status_cb *); | |
d2ddc776 | 976 | extern int afs_fs_rename(struct afs_fs_cursor *, const char *, |
a58823ac DH |
977 | struct afs_vnode *, const char *, |
978 | struct afs_status_cb *, struct afs_status_cb *); | |
4343d008 | 979 | extern int afs_fs_store_data(struct afs_fs_cursor *, struct address_space *, |
a58823ac DH |
980 | pgoff_t, pgoff_t, unsigned, unsigned, struct afs_status_cb *); |
981 | extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *, struct afs_status_cb *); | |
d2ddc776 | 982 | extern int afs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *); |
a58823ac DH |
983 | extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t, struct afs_status_cb *); |
984 | extern int afs_fs_extend_lock(struct afs_fs_cursor *, struct afs_status_cb *); | |
985 | extern int afs_fs_release_lock(struct afs_fs_cursor *, struct afs_status_cb *); | |
d2ddc776 DH |
986 | extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, |
987 | struct afs_addr_cursor *, struct key *); | |
0b9bf381 DH |
988 | extern struct afs_call *afs_fs_get_capabilities(struct afs_net *, struct afs_server *, |
989 | struct afs_addr_cursor *, struct key *, | |
990 | unsigned int); | |
5cf9dd55 | 991 | extern int afs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *, |
87182759 DH |
992 | struct afs_fid *, struct afs_status_cb *, |
993 | unsigned int, struct afs_volsync *); | |
5cf9dd55 | 994 | extern int afs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *, |
a58823ac DH |
995 | struct afs_fid *, struct afs_status_cb *, |
996 | struct afs_volsync *); | |
08e0e7c8 | 997 | |
260f082b DH |
998 | struct afs_acl { |
999 | u32 size; | |
1000 | u8 data[]; | |
1001 | }; | |
1002 | ||
a58823ac DH |
1003 | extern struct afs_acl *afs_fs_fetch_acl(struct afs_fs_cursor *, struct afs_status_cb *); |
1004 | extern int afs_fs_store_acl(struct afs_fs_cursor *, const struct afs_acl *, | |
1005 | struct afs_status_cb *); | |
260f082b | 1006 | |
3bf0fb6f DH |
1007 | /* |
1008 | * fs_probe.c | |
1009 | */ | |
1010 | extern void afs_fileserver_probe_result(struct afs_call *); | |
1011 | extern int afs_probe_fileservers(struct afs_net *, struct key *, struct afs_server_list *); | |
1012 | extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long); | |
1013 | ||
1da177e4 LT |
1014 | /* |
1015 | * inode.c | |
1016 | */ | |
a58823ac DH |
1017 | extern void afs_vnode_commit_status(struct afs_fs_cursor *, |
1018 | struct afs_vnode *, | |
1019 | unsigned int, | |
1020 | const afs_dataversion_t *, | |
1021 | struct afs_status_cb *); | |
1022 | extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); | |
c435ee34 | 1023 | extern int afs_iget5_test(struct inode *, void *); |
4d673da1 | 1024 | extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); |
00d3b7a4 | 1025 | extern struct inode *afs_iget(struct super_block *, struct key *, |
b8359153 | 1026 | struct afs_iget_data *, struct afs_status_cb *, |
b134d687 DH |
1027 | struct afs_cb_interest *, |
1028 | struct afs_vnode *); | |
416351f2 | 1029 | extern void afs_zap_data(struct afs_vnode *); |
c925bd0a | 1030 | extern bool afs_check_validity(struct afs_vnode *); |
260a9803 | 1031 | extern int afs_validate(struct afs_vnode *, struct key *); |
a528d35e | 1032 | extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); |
31143d5d | 1033 | extern int afs_setattr(struct dentry *, struct iattr *); |
b57922d9 | 1034 | extern void afs_evict_inode(struct inode *); |
bec5eb61 | 1035 | extern int afs_drop_inode(struct inode *); |
1da177e4 LT |
1036 | |
1037 | /* | |
1038 | * main.c | |
1039 | */ | |
0ad53eee | 1040 | extern struct workqueue_struct *afs_wq; |
5b86d4ff | 1041 | extern int afs_net_id; |
f044c884 | 1042 | |
5b86d4ff | 1043 | static inline struct afs_net *afs_net(struct net *net) |
f044c884 | 1044 | { |
5b86d4ff | 1045 | return net_generic(net, afs_net_id); |
f044c884 DH |
1046 | } |
1047 | ||
5b86d4ff | 1048 | static inline struct afs_net *afs_sb2net(struct super_block *sb) |
f044c884 | 1049 | { |
5b86d4ff | 1050 | return afs_net(AFS_FS_S(sb)->net_ns); |
f044c884 DH |
1051 | } |
1052 | ||
5b86d4ff | 1053 | static inline struct afs_net *afs_d2net(struct dentry *dentry) |
f044c884 | 1054 | { |
5b86d4ff | 1055 | return afs_sb2net(dentry->d_sb); |
f044c884 DH |
1056 | } |
1057 | ||
5b86d4ff | 1058 | static inline struct afs_net *afs_i2net(struct inode *inode) |
f044c884 | 1059 | { |
5b86d4ff | 1060 | return afs_sb2net(inode->i_sb); |
f044c884 DH |
1061 | } |
1062 | ||
5b86d4ff | 1063 | static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) |
f044c884 | 1064 | { |
5b86d4ff | 1065 | return afs_i2net(&vnode->vfs_inode); |
f044c884 DH |
1066 | } |
1067 | ||
5b86d4ff | 1068 | static inline struct afs_net *afs_sock2net(struct sock *sk) |
f044c884 | 1069 | { |
5b86d4ff | 1070 | return net_generic(sock_net(sk), afs_net_id); |
f044c884 | 1071 | } |
1da177e4 | 1072 | |
d55b4da4 DH |
1073 | static inline void __afs_stat(atomic_t *s) |
1074 | { | |
1075 | atomic_inc(s); | |
1076 | } | |
1077 | ||
1078 | #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) | |
1079 | ||
08e0e7c8 DH |
1080 | /* |
1081 | * misc.c | |
1082 | */ | |
1083 | extern int afs_abort_to_error(u32); | |
4584ae96 | 1084 | extern void afs_prioritise_error(struct afs_error *, int, u32); |
08e0e7c8 | 1085 | |
1da177e4 LT |
1086 | /* |
1087 | * mntpt.c | |
1088 | */ | |
754661f1 | 1089 | extern const struct inode_operations afs_mntpt_inode_operations; |
bec5eb61 | 1090 | extern const struct inode_operations afs_autocell_inode_operations; |
4b6f5d20 | 1091 | extern const struct file_operations afs_mntpt_file_operations; |
1da177e4 | 1092 | |
d18610b0 | 1093 | extern struct vfsmount *afs_d_automount(struct path *); |
08e0e7c8 | 1094 | extern void afs_mntpt_kill_timer(void); |
1da177e4 | 1095 | |
b4db2b35 AB |
1096 | /* |
1097 | * netdevices.c | |
1098 | */ | |
5b86d4ff DH |
1099 | extern int afs_get_ipv4_interfaces(struct afs_net *, struct afs_interface *, |
1100 | size_t, bool); | |
b4db2b35 | 1101 | |
1da177e4 LT |
1102 | /* |
1103 | * proc.c | |
1104 | */ | |
b6cfbeca | 1105 | #ifdef CONFIG_PROC_FS |
f044c884 DH |
1106 | extern int __net_init afs_proc_init(struct afs_net *); |
1107 | extern void __net_exit afs_proc_cleanup(struct afs_net *); | |
5b86d4ff DH |
1108 | extern int afs_proc_cell_setup(struct afs_cell *); |
1109 | extern void afs_proc_cell_remove(struct afs_cell *); | |
6f8880d8 | 1110 | extern void afs_put_sysnames(struct afs_sysnames *); |
b6cfbeca DH |
1111 | #else |
1112 | static inline int afs_proc_init(struct afs_net *net) { return 0; } | |
1113 | static inline void afs_proc_cleanup(struct afs_net *net) {} | |
1114 | static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } | |
1115 | static inline void afs_proc_cell_remove(struct afs_cell *cell) {} | |
1116 | static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} | |
1117 | #endif | |
1da177e4 | 1118 | |
d2ddc776 DH |
1119 | /* |
1120 | * rotate.c | |
1121 | */ | |
1122 | extern bool afs_begin_vnode_operation(struct afs_fs_cursor *, struct afs_vnode *, | |
20b8391f | 1123 | struct key *, bool); |
d2ddc776 DH |
1124 | extern bool afs_select_fileserver(struct afs_fs_cursor *); |
1125 | extern bool afs_select_current_fileserver(struct afs_fs_cursor *); | |
1126 | extern int afs_end_vnode_operation(struct afs_fs_cursor *); | |
1127 | ||
08e0e7c8 DH |
1128 | /* |
1129 | * rxrpc.c | |
1130 | */ | |
f044c884 | 1131 | extern struct workqueue_struct *afs_async_calls; |
8324f0bc | 1132 | |
f044c884 DH |
1133 | extern int __net_init afs_open_socket(struct afs_net *); |
1134 | extern void __net_exit afs_close_socket(struct afs_net *); | |
1135 | extern void afs_charge_preallocation(struct work_struct *); | |
341f741f | 1136 | extern void afs_put_call(struct afs_call *); |
0b9bf381 DH |
1137 | extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t); |
1138 | extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *); | |
f044c884 DH |
1139 | extern struct afs_call *afs_alloc_flat_call(struct afs_net *, |
1140 | const struct afs_call_type *, | |
08e0e7c8 DH |
1141 | size_t, size_t); |
1142 | extern void afs_flat_call_destructor(struct afs_call *); | |
08e0e7c8 | 1143 | extern void afs_send_empty_reply(struct afs_call *); |
b908fe6b | 1144 | extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); |
12bdcf33 | 1145 | extern int afs_extract_data(struct afs_call *, bool); |
160cb957 | 1146 | extern int afs_protocol_error(struct afs_call *, int, enum afs_eproto_cause); |
08e0e7c8 | 1147 | |
20b8391f DH |
1148 | static inline void afs_set_fc_call(struct afs_call *call, struct afs_fs_cursor *fc) |
1149 | { | |
1150 | call->intr = fc->flags & AFS_FS_CURSOR_INTR; | |
a58823ac | 1151 | fc->type = call->type; |
20b8391f DH |
1152 | } |
1153 | ||
12bdcf33 DH |
1154 | static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) |
1155 | { | |
1156 | call->kvec[0].iov_base = buf; | |
1157 | call->kvec[0].iov_len = size; | |
1158 | iov_iter_kvec(&call->iter, READ, call->kvec, 1, size); | |
1159 | } | |
1160 | ||
1161 | static inline void afs_extract_to_tmp(struct afs_call *call) | |
1162 | { | |
1163 | afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); | |
1164 | } | |
1165 | ||
1166 | static inline void afs_extract_to_tmp64(struct afs_call *call) | |
1167 | { | |
1168 | afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); | |
1169 | } | |
1170 | ||
1171 | static inline void afs_extract_discard(struct afs_call *call, size_t size) | |
1172 | { | |
1173 | iov_iter_discard(&call->iter, READ, size); | |
1174 | } | |
1175 | ||
1176 | static inline void afs_extract_to_buf(struct afs_call *call, size_t size) | |
1177 | { | |
1178 | afs_extract_begin(call, call->buffer, size); | |
1179 | } | |
1180 | ||
d001648e | 1181 | static inline int afs_transfer_reply(struct afs_call *call) |
372ee163 | 1182 | { |
12bdcf33 | 1183 | return afs_extract_data(call, false); |
372ee163 DH |
1184 | } |
1185 | ||
98bf40cd DH |
1186 | static inline bool afs_check_call_state(struct afs_call *call, |
1187 | enum afs_call_state state) | |
1188 | { | |
1189 | return READ_ONCE(call->state) == state; | |
1190 | } | |
1191 | ||
1192 | static inline bool afs_set_call_state(struct afs_call *call, | |
1193 | enum afs_call_state from, | |
1194 | enum afs_call_state to) | |
1195 | { | |
1196 | bool ok = false; | |
1197 | ||
1198 | spin_lock_bh(&call->state_lock); | |
1199 | if (call->state == from) { | |
1200 | call->state = to; | |
1201 | trace_afs_call_state(call, from, to, 0, 0); | |
1202 | ok = true; | |
1203 | } | |
1204 | spin_unlock_bh(&call->state_lock); | |
1205 | return ok; | |
1206 | } | |
1207 | ||
1208 | static inline void afs_set_call_complete(struct afs_call *call, | |
1209 | int error, u32 remote_abort) | |
1210 | { | |
1211 | enum afs_call_state state; | |
1212 | bool ok = false; | |
1213 | ||
1214 | spin_lock_bh(&call->state_lock); | |
1215 | state = call->state; | |
1216 | if (state != AFS_CALL_COMPLETE) { | |
1217 | call->abort_code = remote_abort; | |
1218 | call->error = error; | |
1219 | call->state = AFS_CALL_COMPLETE; | |
1220 | trace_afs_call_state(call, state, AFS_CALL_COMPLETE, | |
1221 | error, remote_abort); | |
1222 | ok = true; | |
1223 | } | |
1224 | spin_unlock_bh(&call->state_lock); | |
1225 | if (ok) | |
1226 | trace_afs_call_done(call); | |
1227 | } | |
1228 | ||
00d3b7a4 DH |
1229 | /* |
1230 | * security.c | |
1231 | */ | |
be080a6f | 1232 | extern void afs_put_permits(struct afs_permits *); |
00d3b7a4 | 1233 | extern void afs_clear_permits(struct afs_vnode *); |
a58823ac DH |
1234 | extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, |
1235 | struct afs_status_cb *); | |
416351f2 | 1236 | extern void afs_zap_permits(struct rcu_head *); |
00d3b7a4 | 1237 | extern struct key *afs_request_key(struct afs_cell *); |
0fafdc9f | 1238 | extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); |
10556cb2 | 1239 | extern int afs_permission(struct inode *, int); |
be080a6f | 1240 | extern void __exit afs_clean_up_permit_cache(void); |
00d3b7a4 | 1241 | |
08e0e7c8 DH |
1242 | /* |
1243 | * server.c | |
1244 | */ | |
1245 | extern spinlock_t afs_server_peer_lock; | |
1246 | ||
c435ee34 DH |
1247 | static inline struct afs_server *afs_get_server(struct afs_server *server) |
1248 | { | |
1249 | atomic_inc(&server->usage); | |
1250 | return server; | |
1251 | } | |
08e0e7c8 | 1252 | |
f044c884 DH |
1253 | extern struct afs_server *afs_find_server(struct afs_net *, |
1254 | const struct sockaddr_rxrpc *); | |
d2ddc776 DH |
1255 | extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); |
1256 | extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *); | |
9ed900b1 | 1257 | extern void afs_put_server(struct afs_net *, struct afs_server *); |
d2ddc776 DH |
1258 | extern void afs_manage_servers(struct work_struct *); |
1259 | extern void afs_servers_timer(struct timer_list *); | |
f044c884 | 1260 | extern void __net_exit afs_purge_servers(struct afs_net *); |
d2ddc776 | 1261 | extern bool afs_check_server_record(struct afs_fs_cursor *, struct afs_server *); |
08e0e7c8 | 1262 | |
00d3b7a4 | 1263 | /* |
d2ddc776 | 1264 | * server_list.c |
00d3b7a4 | 1265 | */ |
d2ddc776 DH |
1266 | static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) |
1267 | { | |
1268 | refcount_inc(&slist->usage); | |
1269 | return slist; | |
1270 | } | |
00d3b7a4 | 1271 | |
d2ddc776 DH |
1272 | extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); |
1273 | extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, | |
1274 | struct afs_vldb_entry *, | |
1275 | u8); | |
1276 | extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); | |
08e0e7c8 DH |
1277 | |
1278 | /* | |
d2ddc776 | 1279 | * super.c |
08e0e7c8 | 1280 | */ |
d2ddc776 | 1281 | extern int __init afs_fs_init(void); |
5b86d4ff | 1282 | extern void afs_fs_exit(void); |
08e0e7c8 DH |
1283 | |
1284 | /* | |
d2ddc776 | 1285 | * vlclient.c |
08e0e7c8 | 1286 | */ |
0a5143f2 DH |
1287 | extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, |
1288 | const char *, int); | |
1289 | extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); | |
0b9bf381 DH |
1290 | extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, |
1291 | struct key *, struct afs_vlserver *, unsigned int); | |
0a5143f2 DH |
1292 | extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); |
1293 | ||
3bf0fb6f DH |
1294 | /* |
1295 | * vl_probe.c | |
1296 | */ | |
1297 | extern void afs_vlserver_probe_result(struct afs_call *); | |
1298 | extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); | |
1299 | extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); | |
1300 | ||
0a5143f2 DH |
1301 | /* |
1302 | * vl_rotate.c | |
1303 | */ | |
1304 | extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, | |
1305 | struct afs_cell *, struct key *); | |
1306 | extern bool afs_select_vlserver(struct afs_vl_cursor *); | |
1307 | extern bool afs_select_current_vlserver(struct afs_vl_cursor *); | |
1308 | extern int afs_end_vlserver_operation(struct afs_vl_cursor *); | |
1309 | ||
1310 | /* | |
1311 | * vlserver_list.c | |
1312 | */ | |
1313 | static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) | |
1314 | { | |
1315 | atomic_inc(&vlserver->usage); | |
1316 | return vlserver; | |
1317 | } | |
1318 | ||
1319 | static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) | |
1320 | { | |
1321 | if (vllist) | |
1322 | atomic_inc(&vllist->usage); | |
1323 | return vllist; | |
1324 | } | |
1325 | ||
1326 | extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); | |
1327 | extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); | |
1328 | extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); | |
1329 | extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); | |
1330 | extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, | |
1331 | const void *, size_t); | |
08e0e7c8 DH |
1332 | |
1333 | /* | |
1334 | * volume.c | |
1335 | */ | |
d2ddc776 | 1336 | static inline struct afs_volume *__afs_get_volume(struct afs_volume *volume) |
49566f6f DH |
1337 | { |
1338 | if (volume) | |
1339 | atomic_inc(&volume->usage); | |
1340 | return volume; | |
1341 | } | |
08e0e7c8 | 1342 | |
13fcc683 | 1343 | extern struct afs_volume *afs_create_volume(struct afs_fs_context *); |
d2ddc776 DH |
1344 | extern void afs_activate_volume(struct afs_volume *); |
1345 | extern void afs_deactivate_volume(struct afs_volume *); | |
9ed900b1 | 1346 | extern void afs_put_volume(struct afs_cell *, struct afs_volume *); |
d2ddc776 | 1347 | extern int afs_check_volume_status(struct afs_volume *, struct key *); |
08e0e7c8 | 1348 | |
31143d5d DH |
1349 | /* |
1350 | * write.c | |
1351 | */ | |
1352 | extern int afs_set_page_dirty(struct page *); | |
15b4650e NP |
1353 | extern int afs_write_begin(struct file *file, struct address_space *mapping, |
1354 | loff_t pos, unsigned len, unsigned flags, | |
1355 | struct page **pagep, void **fsdata); | |
1356 | extern int afs_write_end(struct file *file, struct address_space *mapping, | |
1357 | loff_t pos, unsigned len, unsigned copied, | |
1358 | struct page *page, void *fsdata); | |
31143d5d DH |
1359 | extern int afs_writepage(struct page *, struct writeback_control *); |
1360 | extern int afs_writepages(struct address_space *, struct writeback_control *); | |
50b5551d | 1361 | extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); |
02c24a82 | 1362 | extern int afs_fsync(struct file *, loff_t, loff_t, int); |
0722f186 | 1363 | extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); |
4343d008 DH |
1364 | extern void afs_prune_wb_keys(struct afs_vnode *); |
1365 | extern int afs_launder_page(struct page *); | |
31143d5d | 1366 | |
d3e3b7ea DH |
1367 | /* |
1368 | * xattr.c | |
1369 | */ | |
1370 | extern const struct xattr_handler *afs_xattr_handlers[]; | |
1371 | extern ssize_t afs_listxattr(struct dentry *, char *, size_t); | |
31143d5d | 1372 | |
30062bd1 DH |
1373 | /* |
1374 | * yfsclient.c | |
1375 | */ | |
a58823ac DH |
1376 | extern int yfs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_status_cb *, |
1377 | struct afs_volsync *); | |
1378 | extern int yfs_fs_fetch_data(struct afs_fs_cursor *, struct afs_status_cb *, struct afs_read *); | |
1379 | extern int yfs_fs_create_file(struct afs_fs_cursor *, const char *, umode_t, struct afs_status_cb *, | |
1380 | struct afs_fid *, struct afs_status_cb *); | |
1381 | extern int yfs_fs_make_dir(struct afs_fs_cursor *, const char *, umode_t, struct afs_status_cb *, | |
1382 | struct afs_fid *, struct afs_status_cb *); | |
1383 | extern int yfs_fs_remove_file2(struct afs_fs_cursor *, struct afs_vnode *, const char *, | |
1384 | struct afs_status_cb *, struct afs_status_cb *); | |
1385 | extern int yfs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool, | |
1386 | struct afs_status_cb *); | |
1387 | extern int yfs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, | |
1388 | struct afs_status_cb *, struct afs_status_cb *); | |
1389 | extern int yfs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, | |
1390 | struct afs_status_cb *, struct afs_fid *, struct afs_status_cb *); | |
1391 | extern int yfs_fs_rename(struct afs_fs_cursor *, const char *, struct afs_vnode *, const char *, | |
1392 | struct afs_status_cb *, struct afs_status_cb *); | |
30062bd1 | 1393 | extern int yfs_fs_store_data(struct afs_fs_cursor *, struct address_space *, |
a58823ac DH |
1394 | pgoff_t, pgoff_t, unsigned, unsigned, struct afs_status_cb *); |
1395 | extern int yfs_fs_setattr(struct afs_fs_cursor *, struct iattr *, struct afs_status_cb *); | |
30062bd1 | 1396 | extern int yfs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *); |
a58823ac DH |
1397 | extern int yfs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t, struct afs_status_cb *); |
1398 | extern int yfs_fs_extend_lock(struct afs_fs_cursor *, struct afs_status_cb *); | |
1399 | extern int yfs_fs_release_lock(struct afs_fs_cursor *, struct afs_status_cb *); | |
30062bd1 | 1400 | extern int yfs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *, |
a58823ac DH |
1401 | struct afs_fid *, struct afs_status_cb *, |
1402 | struct afs_volsync *); | |
30062bd1 | 1403 | extern int yfs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *, |
87182759 DH |
1404 | struct afs_fid *, struct afs_status_cb *, |
1405 | unsigned int, struct afs_volsync *); | |
d2ddc776 | 1406 | |
ae46578b DH |
1407 | struct yfs_acl { |
1408 | struct afs_acl *acl; /* Dir/file/symlink ACL */ | |
1409 | struct afs_acl *vol_acl; /* Whole volume ACL */ | |
1410 | u32 inherit_flag; /* True if ACL is inherited from parent dir */ | |
1411 | u32 num_cleaned; /* Number of ACEs removed due to subject removal */ | |
1412 | unsigned int flags; | |
1413 | #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ | |
1414 | #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ | |
1415 | }; | |
1416 | ||
1417 | extern void yfs_free_opaque_acl(struct yfs_acl *); | |
a58823ac DH |
1418 | extern struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *, struct yfs_acl *, |
1419 | struct afs_status_cb *); | |
1420 | extern int yfs_fs_store_opaque_acl2(struct afs_fs_cursor *, const struct afs_acl *, | |
1421 | struct afs_status_cb *); | |
ae46578b | 1422 | |
d2ddc776 DH |
1423 | /* |
1424 | * Miscellaneous inline functions. | |
1425 | */ | |
1426 | static inline struct afs_vnode *AFS_FS_I(struct inode *inode) | |
1427 | { | |
1428 | return container_of(inode, struct afs_vnode, vfs_inode); | |
1429 | } | |
1430 | ||
1431 | static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) | |
1432 | { | |
1433 | return &vnode->vfs_inode; | |
1434 | } | |
1435 | ||
d2ddc776 DH |
1436 | static inline void afs_check_for_remote_deletion(struct afs_fs_cursor *fc, |
1437 | struct afs_vnode *vnode) | |
1438 | { | |
1439 | if (fc->ac.error == -ENOENT) { | |
1440 | set_bit(AFS_VNODE_DELETED, &vnode->flags); | |
1441 | afs_break_callback(vnode); | |
1442 | } | |
1443 | } | |
1444 | ||
f51375cd DH |
1445 | static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) |
1446 | { | |
1447 | trace_afs_io_error(call->debug_id, -EIO, where); | |
1448 | return -EIO; | |
1449 | } | |
1450 | ||
1451 | static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) | |
1452 | { | |
1453 | trace_afs_file_error(vnode, -EIO, where); | |
1454 | return -EIO; | |
1455 | } | |
d2ddc776 | 1456 | |
08e0e7c8 DH |
1457 | /*****************************************************************************/ |
1458 | /* | |
1459 | * debug tracing | |
1460 | */ | |
1461 | extern unsigned afs_debug; | |
1462 | ||
1463 | #define dbgprintk(FMT,...) \ | |
ad16df84 | 1464 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
08e0e7c8 | 1465 | |
530b6412 HH |
1466 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1467 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
08e0e7c8 DH |
1468 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
1469 | ||
1470 | ||
1471 | #if defined(__KDEBUG) | |
1472 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
1473 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
1474 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
1475 | ||
1476 | #elif defined(CONFIG_AFS_DEBUG) | |
1477 | #define AFS_DEBUG_KENTER 0x01 | |
1478 | #define AFS_DEBUG_KLEAVE 0x02 | |
1479 | #define AFS_DEBUG_KDEBUG 0x04 | |
1480 | ||
1481 | #define _enter(FMT,...) \ | |
1482 | do { \ | |
1483 | if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ | |
1484 | kenter(FMT,##__VA_ARGS__); \ | |
1485 | } while (0) | |
1486 | ||
1487 | #define _leave(FMT,...) \ | |
1488 | do { \ | |
1489 | if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ | |
1490 | kleave(FMT,##__VA_ARGS__); \ | |
1491 | } while (0) | |
1492 | ||
1493 | #define _debug(FMT,...) \ | |
1494 | do { \ | |
1495 | if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ | |
1496 | kdebug(FMT,##__VA_ARGS__); \ | |
1497 | } while (0) | |
1498 | ||
1499 | #else | |
12fdff3f DH |
1500 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1501 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
1502 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
08e0e7c8 DH |
1503 | #endif |
1504 | ||
1505 | /* | |
1506 | * debug assertion checking | |
1507 | */ | |
1508 | #if 1 // defined(__KDEBUGALL) | |
1509 | ||
1510 | #define ASSERT(X) \ | |
1511 | do { \ | |
1512 | if (unlikely(!(X))) { \ | |
1513 | printk(KERN_ERR "\n"); \ | |
1514 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1515 | BUG(); \ | |
1516 | } \ | |
1517 | } while(0) | |
1518 | ||
1519 | #define ASSERTCMP(X, OP, Y) \ | |
1520 | do { \ | |
1521 | if (unlikely(!((X) OP (Y)))) { \ | |
1522 | printk(KERN_ERR "\n"); \ | |
1523 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1524 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
1525 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1526 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
1527 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1528 | BUG(); \ | |
1529 | } \ | |
1530 | } while(0) | |
1531 | ||
416351f2 DH |
1532 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
1533 | do { \ | |
1534 | if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ | |
1535 | printk(KERN_ERR "\n"); \ | |
1536 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1537 | printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ | |
1538 | (unsigned long)(L), (unsigned long)(N), \ | |
1539 | (unsigned long)(H)); \ | |
1540 | printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ | |
1541 | (unsigned long)(L), (unsigned long)(N), \ | |
1542 | (unsigned long)(H)); \ | |
1543 | BUG(); \ | |
1544 | } \ | |
1545 | } while(0) | |
1546 | ||
08e0e7c8 DH |
1547 | #define ASSERTIF(C, X) \ |
1548 | do { \ | |
1549 | if (unlikely((C) && !(X))) { \ | |
1550 | printk(KERN_ERR "\n"); \ | |
1551 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1552 | BUG(); \ | |
1553 | } \ | |
1554 | } while(0) | |
1555 | ||
1556 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1557 | do { \ | |
1558 | if (unlikely((C) && !((X) OP (Y)))) { \ | |
1559 | printk(KERN_ERR "\n"); \ | |
1560 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1561 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
1562 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1563 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
1564 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1565 | BUG(); \ | |
1566 | } \ | |
1567 | } while(0) | |
1568 | ||
1569 | #else | |
1570 | ||
1571 | #define ASSERT(X) \ | |
1572 | do { \ | |
1573 | } while(0) | |
1574 | ||
1575 | #define ASSERTCMP(X, OP, Y) \ | |
1576 | do { \ | |
1577 | } while(0) | |
1578 | ||
416351f2 DH |
1579 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
1580 | do { \ | |
1581 | } while(0) | |
1582 | ||
08e0e7c8 DH |
1583 | #define ASSERTIF(C, X) \ |
1584 | do { \ | |
1585 | } while(0) | |
1586 | ||
1587 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1588 | do { \ | |
1589 | } while(0) | |
1590 | ||
1591 | #endif /* __KDEBUGALL */ |