Commit | Line | Data |
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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
ec26815a | 2 | /* internal AFS stuff |
1da177e4 | 3 | * |
08e0e7c8 | 4 | * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved. |
1da177e4 | 5 | * Written by David Howells (dhowells@redhat.com) |
1da177e4 LT |
6 | */ |
7 | ||
1da177e4 LT |
8 | #include <linux/compiler.h> |
9 | #include <linux/kernel.h> | |
8a79790b | 10 | #include <linux/ktime.h> |
1da177e4 | 11 | #include <linux/fs.h> |
5970e15d | 12 | #include <linux/filelock.h> |
1da177e4 | 13 | #include <linux/pagemap.h> |
08e0e7c8 | 14 | #include <linux/rxrpc.h> |
00d3b7a4 | 15 | #include <linux/key.h> |
e8edc6e0 | 16 | #include <linux/workqueue.h> |
00c541ea | 17 | #include <linux/sched.h> |
80e50be4 | 18 | #include <linux/fscache.h> |
e1da0222 | 19 | #include <linux/backing-dev.h> |
ff548773 | 20 | #include <linux/uuid.h> |
0722f186 | 21 | #include <linux/mm_types.h> |
0a5143f2 | 22 | #include <linux/dns_resolver.h> |
f044c884 | 23 | #include <net/net_namespace.h> |
5b86d4ff DH |
24 | #include <net/netns/generic.h> |
25 | #include <net/sock.h> | |
8324f0bc | 26 | #include <net/af_rxrpc.h> |
00c541ea | 27 | |
08e0e7c8 DH |
28 | #include "afs.h" |
29 | #include "afs_vl.h" | |
30 | ||
31 | #define AFS_CELL_MAX_ADDRS 15 | |
32 | ||
31143d5d | 33 | struct pagevec; |
08e0e7c8 | 34 | struct afs_call; |
c4508464 | 35 | struct afs_vnode; |
f49b594d | 36 | struct afs_server_probe; |
08e0e7c8 | 37 | |
6c6c1d63 DH |
38 | /* |
39 | * Partial file-locking emulation mode. (The problem being that AFS3 only | |
40 | * allows whole-file locks and no upgrading/downgrading). | |
41 | */ | |
42 | enum afs_flock_mode { | |
43 | afs_flock_mode_unset, | |
44 | afs_flock_mode_local, /* Local locking only */ | |
45 | afs_flock_mode_openafs, /* Don't get server lock for a partial lock */ | |
46 | afs_flock_mode_strict, /* Always get a server lock for a partial lock */ | |
47 | afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */ | |
48 | }; | |
49 | ||
13fcc683 | 50 | struct afs_fs_context { |
00d3b7a4 | 51 | bool force; /* T to force cell type */ |
bec5eb61 | 52 | bool autocell; /* T if set auto mount operation */ |
4d673da1 | 53 | bool dyn_root; /* T if dynamic root */ |
13fcc683 | 54 | bool no_cell; /* T if the source is "none" (for dynroot) */ |
6c6c1d63 | 55 | enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */ |
00d3b7a4 | 56 | afs_voltype_t type; /* type of volume requested */ |
13fcc683 | 57 | unsigned int volnamesz; /* size of volume name */ |
00d3b7a4 | 58 | const char *volname; /* name of volume to mount */ |
5b86d4ff | 59 | struct afs_net *net; /* the AFS net namespace stuff */ |
00d3b7a4 DH |
60 | struct afs_cell *cell; /* cell in which to find volume */ |
61 | struct afs_volume *volume; /* volume record */ | |
62 | struct key *key; /* key to use for secure mounting */ | |
63 | }; | |
64 | ||
8e8d7f13 | 65 | enum afs_call_state { |
98bf40cd DH |
66 | AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ |
67 | AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ | |
68 | AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ | |
69 | AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ | |
70 | AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ | |
71 | AFS_CALL_SV_REPLYING, /* Server: Replying */ | |
72 | AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ | |
73 | AFS_CALL_COMPLETE, /* Completed or failed */ | |
8e8d7f13 | 74 | }; |
f044c884 | 75 | |
f94f70d3 DH |
76 | /* |
77 | * Address preferences. | |
78 | */ | |
79 | struct afs_addr_preference { | |
80 | union { | |
81 | struct in_addr ipv4_addr; /* AF_INET address to compare against */ | |
82 | struct in6_addr ipv6_addr; /* AF_INET6 address to compare against */ | |
83 | }; | |
84 | sa_family_t family; /* Which address to use */ | |
85 | u16 prio; /* Priority */ | |
86 | u8 subnet_mask; /* How many bits to compare */ | |
87 | }; | |
88 | ||
89 | struct afs_addr_preference_list { | |
90 | struct rcu_head rcu; | |
91 | u16 version; /* Incremented when prefs list changes */ | |
92 | u8 ipv6_off; /* Offset of IPv6 addresses */ | |
93 | u8 nr; /* Number of addresses in total */ | |
94 | u8 max_prefs; /* Number of prefs allocated */ | |
95 | struct afs_addr_preference prefs[] __counted_by(max_prefs); | |
96 | }; | |
97 | ||
72904d7b DH |
98 | struct afs_address { |
99 | struct rxrpc_peer *peer; | |
aa453bec | 100 | short last_error; /* Last error from this address */ |
d14cf8ed | 101 | u16 prio; /* Address priority */ |
72904d7b DH |
102 | }; |
103 | ||
8b2a464c DH |
104 | /* |
105 | * List of server addresses. | |
106 | */ | |
107 | struct afs_addr_list { | |
ddd2b85f | 108 | struct rcu_head rcu; |
8b2a464c | 109 | refcount_t usage; |
d2ddc776 | 110 | u32 version; /* Version */ |
1e5d8493 | 111 | unsigned int debug_id; |
d14cf8ed | 112 | unsigned int addr_pref_version; /* Version of address preference list */ |
68eb64c3 DH |
113 | unsigned char max_addrs; |
114 | unsigned char nr_addrs; | |
3bf0fb6f | 115 | unsigned char preferred; /* Preferred address */ |
68eb64c3 | 116 | unsigned char nr_ipv4; /* Number of IPv4 addresses */ |
0a5143f2 DH |
117 | enum dns_record_source source:8; |
118 | enum dns_lookup_status status:8; | |
aa4917d6 | 119 | unsigned long probe_failed; /* Mask of addrs that failed locally/ICMP */ |
3bf0fb6f | 120 | unsigned long responded; /* Mask of addrs that responded */ |
72904d7b | 121 | struct afs_address addrs[] __counted_by(max_addrs); |
68eb64c3 | 122 | #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8)) |
8b2a464c DH |
123 | }; |
124 | ||
08e0e7c8 DH |
125 | /* |
126 | * a record of an in-progress RxRPC call | |
127 | */ | |
128 | struct afs_call { | |
129 | const struct afs_call_type *type; /* type of call */ | |
08e0e7c8 | 130 | wait_queue_head_t waitq; /* processes awaiting completion */ |
341f741f | 131 | struct work_struct async_work; /* async I/O processor */ |
08e0e7c8 | 132 | struct work_struct work; /* actual work processor */ |
08e0e7c8 | 133 | struct rxrpc_call *rxcall; /* RxRPC call handle */ |
e38f299e | 134 | struct rxrpc_peer *peer; /* Remote endpoint */ |
08e0e7c8 | 135 | struct key *key; /* security for this call */ |
f044c884 | 136 | struct afs_net *net; /* The network namespace */ |
a6853b9c DH |
137 | struct afs_server *server; /* The fileserver record if fs op (pins ref) */ |
138 | struct afs_vlserver *vlserver; /* The vlserver record if vl op */ | |
08e0e7c8 | 139 | void *request; /* request data (first part) */ |
f105da1a | 140 | size_t iov_len; /* Size of *iter to be used */ |
fc276122 | 141 | struct iov_iter def_iter; /* Default buffer/data iterator */ |
bd80d8a8 | 142 | struct iov_iter *write_iter; /* Iterator defining write to be made */ |
fc276122 DH |
143 | struct iov_iter *iter; /* Iterator currently in use */ |
144 | union { /* Convenience for ->def_iter */ | |
12bdcf33 DH |
145 | struct kvec kvec[1]; |
146 | struct bio_vec bvec[1]; | |
147 | }; | |
08e0e7c8 | 148 | void *buffer; /* reply receive buffer */ |
ffba718e | 149 | union { |
f49b594d DH |
150 | struct afs_endpoint_state *probe; |
151 | struct afs_addr_list *vl_probe; | |
ffba718e DH |
152 | struct afs_addr_list *ret_alist; |
153 | struct afs_vldb_entry *ret_vldb; | |
c3e9f888 | 154 | char *ret_str; |
ffba718e | 155 | }; |
abcbd3bf | 156 | struct afs_fid fid; /* Primary vnode ID (or all zeroes) */ |
f49b594d | 157 | unsigned char probe_index; /* Address in ->probe_alist */ |
e49c7b2f | 158 | struct afs_operation *op; |
ffba718e | 159 | unsigned int server_index; |
c56f9ec8 | 160 | refcount_t ref; |
8e8d7f13 | 161 | enum afs_call_state state; |
98bf40cd | 162 | spinlock_t state_lock; |
08e0e7c8 | 163 | int error; /* error code */ |
d001648e | 164 | u32 abort_code; /* Remote abort ID or 0 */ |
db099c62 | 165 | unsigned int max_lifespan; /* Maximum lifespan in secs to set if not 0 */ |
08e0e7c8 DH |
166 | unsigned request_size; /* size of request data */ |
167 | unsigned reply_max; /* maximum size of reply */ | |
e49c7b2f | 168 | unsigned count2; /* count used in unmarshalling */ |
08e0e7c8 | 169 | unsigned char unmarshall; /* unmarshalling phase */ |
dde9f095 | 170 | bool drop_ref; /* T if need to drop ref for incoming call */ |
d001648e | 171 | bool need_attention; /* T if RxRPC poked us */ |
56ff9c83 | 172 | bool async; /* T if asynchronous */ |
a68f4a27 | 173 | bool upgrade; /* T to request service upgrade */ |
20b8391f | 174 | bool intr; /* T if interruptible */ |
38355eec | 175 | bool unmarshalling_error; /* T if an unmarshalling error occurred */ |
aa453bec | 176 | bool responded; /* Got a response from the call (may be abort) */ |
bf99a53c | 177 | u16 service_id; /* Actual service ID (after upgrade) */ |
a25e21f0 | 178 | unsigned int debug_id; /* Trace ID */ |
50a2c953 | 179 | u32 operation_ID; /* operation ID for an incoming call */ |
08e0e7c8 | 180 | u32 count; /* count for use in unmarshalling */ |
12bdcf33 DH |
181 | union { /* place to extract temporary data */ |
182 | struct { | |
183 | __be32 tmp_u; | |
184 | __be32 tmp; | |
185 | } __attribute__((packed)); | |
186 | __be64 tmp64; | |
187 | }; | |
7903192c | 188 | ktime_t issue_time; /* Time of issue of operation */ |
08e0e7c8 DH |
189 | }; |
190 | ||
191 | struct afs_call_type { | |
00d3b7a4 | 192 | const char *name; |
025db80c | 193 | unsigned int op; /* Really enum afs_fs_operation */ |
00d3b7a4 | 194 | |
08e0e7c8 DH |
195 | /* deliver request or reply data to an call |
196 | * - returning an error will cause the call to be aborted | |
197 | */ | |
d001648e | 198 | int (*deliver)(struct afs_call *call); |
08e0e7c8 | 199 | |
08e0e7c8 DH |
200 | /* clean up a call */ |
201 | void (*destructor)(struct afs_call *call); | |
341f741f DH |
202 | |
203 | /* Work function */ | |
204 | void (*work)(struct work_struct *work); | |
3bf0fb6f DH |
205 | |
206 | /* Call done function (gets called immediately on success or failure) */ | |
207 | void (*done)(struct afs_call *call); | |
08e0e7c8 DH |
208 | }; |
209 | ||
4343d008 DH |
210 | /* |
211 | * Key available for writeback on a file. | |
212 | */ | |
213 | struct afs_wb_key { | |
214 | refcount_t usage; | |
215 | struct key *key; | |
216 | struct list_head vnode_link; /* Link in vnode->wb_keys */ | |
217 | }; | |
218 | ||
215804a9 DH |
219 | /* |
220 | * AFS open file information record. Pointed to by file->private_data. | |
221 | */ | |
222 | struct afs_file { | |
223 | struct key *key; /* The key this file was opened with */ | |
4343d008 | 224 | struct afs_wb_key *wb; /* Writeback key record for this file */ |
215804a9 DH |
225 | }; |
226 | ||
227 | static inline struct key *afs_file_key(struct file *file) | |
228 | { | |
229 | struct afs_file *af = file->private_data; | |
230 | ||
231 | return af->key; | |
232 | } | |
233 | ||
196ee9cd DH |
234 | /* |
235 | * Record of an outstanding read operation on a vnode. | |
236 | */ | |
237 | struct afs_read { | |
238 | loff_t pos; /* Where to start reading */ | |
e8e581a8 | 239 | loff_t len; /* How much we're asking for */ |
196ee9cd | 240 | loff_t actual_len; /* How much we're actually getting */ |
f3ddee8d | 241 | loff_t file_size; /* File size returned by server */ |
c69bf479 | 242 | struct key *key; /* The key to use to reissue the read */ |
c4508464 | 243 | struct afs_vnode *vnode; /* The file being read into. */ |
6a19114b | 244 | struct netfs_io_subrequest *subreq; /* Fscache helper read request this belongs to */ |
f3ddee8d DH |
245 | afs_dataversion_t data_version; /* Version number returned by server */ |
246 | refcount_t usage; | |
c4508464 | 247 | unsigned int call_debug_id; |
196ee9cd | 248 | unsigned int nr_pages; |
c4508464 DH |
249 | int error; |
250 | void (*done)(struct afs_read *); | |
251 | void (*cleanup)(struct afs_read *); | |
252 | struct iov_iter *iter; /* Iterator representing the buffer */ | |
253 | struct iov_iter def_iter; /* Default iterator */ | |
196ee9cd DH |
254 | }; |
255 | ||
08e0e7c8 DH |
256 | /* |
257 | * AFS superblock private data | |
258 | * - there's one superblock per volume | |
259 | */ | |
260 | struct afs_super_info { | |
5b86d4ff | 261 | struct net *net_ns; /* Network namespace */ |
49566f6f | 262 | struct afs_cell *cell; /* The cell in which the volume resides */ |
08e0e7c8 | 263 | struct afs_volume *volume; /* volume record */ |
6c6c1d63 | 264 | enum afs_flock_mode flock_mode:8; /* File locking emulation mode */ |
4d673da1 | 265 | bool dyn_root; /* True if dynamic root */ |
08e0e7c8 | 266 | }; |
1da177e4 | 267 | |
08e0e7c8 DH |
268 | static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
269 | { | |
270 | return sb->s_fs_info; | |
1da177e4 LT |
271 | } |
272 | ||
08e0e7c8 DH |
273 | extern struct file_system_type afs_fs_type; |
274 | ||
6f8880d8 DH |
275 | /* |
276 | * Set of substitutes for @sys. | |
277 | */ | |
278 | struct afs_sysnames { | |
279 | #define AFS_NR_SYSNAME 16 | |
280 | char *subs[AFS_NR_SYSNAME]; | |
281 | refcount_t usage; | |
282 | unsigned short nr; | |
6f8880d8 DH |
283 | char blank[1]; |
284 | }; | |
285 | ||
f044c884 DH |
286 | /* |
287 | * AFS network namespace record. | |
288 | */ | |
289 | struct afs_net { | |
5b86d4ff | 290 | struct net *net; /* Backpointer to the owning net namespace */ |
f044c884 DH |
291 | struct afs_uuid uuid; |
292 | bool live; /* F if this namespace is being removed */ | |
293 | ||
294 | /* AF_RXRPC I/O stuff */ | |
295 | struct socket *socket; | |
296 | struct afs_call *spare_incoming_call; | |
297 | struct work_struct charge_preallocation_work; | |
298 | struct mutex socket_mutex; | |
299 | atomic_t nr_outstanding_calls; | |
300 | atomic_t nr_superblocks; | |
301 | ||
302 | /* Cell database */ | |
989782dc | 303 | struct rb_root cells; |
92e3cc91 | 304 | struct afs_cell *ws_cell; |
989782dc DH |
305 | struct work_struct cells_manager; |
306 | struct timer_list cells_timer; | |
307 | atomic_t cells_outstanding; | |
92e3cc91 | 308 | struct rw_semaphore cells_lock; |
8a070a96 | 309 | struct mutex cells_alias_lock; |
f044c884 | 310 | |
0da0b7fd | 311 | struct mutex proc_cells_lock; |
6b3944e4 | 312 | struct hlist_head proc_cells; |
f044c884 | 313 | |
d2ddc776 DH |
314 | /* Known servers. Theoretically each fileserver can only be in one |
315 | * cell, but in practice, people create aliases and subsets and there's | |
316 | * no easy way to distinguish them. | |
317 | */ | |
f6cbb368 | 318 | seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */ |
d2ddc776 | 319 | struct rb_root fs_servers; /* afs_server (by server UUID or address) */ |
f6cbb368 DH |
320 | struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */ |
321 | struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */ | |
d2ddc776 | 322 | struct hlist_head fs_proc; /* procfs servers list */ |
f044c884 | 323 | |
bfacaf71 | 324 | struct hlist_head fs_addresses; /* afs_server (by lowest IPv6 addr) */ |
d2ddc776 | 325 | seqlock_t fs_addr_lock; /* For fs_addresses[46] */ |
f044c884 | 326 | |
d2ddc776 DH |
327 | struct work_struct fs_manager; |
328 | struct timer_list fs_timer; | |
f6cbb368 DH |
329 | |
330 | struct work_struct fs_prober; | |
331 | struct timer_list fs_probe_timer; | |
59fa1c4a | 332 | atomic_t servers_outstanding; |
f044c884 | 333 | |
d2ddc776 DH |
334 | /* File locking renewal management */ |
335 | struct mutex lock_manager_mutex; | |
336 | ||
f044c884 | 337 | /* Misc */ |
0da0b7fd | 338 | struct super_block *dynroot_sb; /* Dynamic root mount superblock */ |
d55b4da4 | 339 | struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ |
6f8880d8 DH |
340 | struct afs_sysnames *sysnames; |
341 | rwlock_t sysnames_lock; | |
f94f70d3 DH |
342 | struct afs_addr_preference_list __rcu *address_prefs; |
343 | u16 address_pref_version; | |
d55b4da4 DH |
344 | |
345 | /* Statistics counters */ | |
346 | atomic_t n_lookup; /* Number of lookups done */ | |
347 | atomic_t n_reval; /* Number of dentries needing revalidation */ | |
348 | atomic_t n_inval; /* Number of invalidations by the server */ | |
508cae68 | 349 | atomic_t n_relpg; /* Number of invalidations by release_folio */ |
d55b4da4 | 350 | atomic_t n_read_dir; /* Number of directory pages read */ |
63a4681f DH |
351 | atomic_t n_dir_cr; /* Number of directory entry creation edits */ |
352 | atomic_t n_dir_rm; /* Number of directory entry removal edits */ | |
76a5cb6f DH |
353 | atomic_t n_stores; /* Number of store ops */ |
354 | atomic_long_t n_store_bytes; /* Number of bytes stored */ | |
355 | atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ | |
356 | atomic_t n_fetches; /* Number of data fetch ops */ | |
f044c884 DH |
357 | }; |
358 | ||
6f8880d8 | 359 | extern const char afs_init_sysname[]; |
f044c884 | 360 | |
989782dc DH |
361 | enum afs_cell_state { |
362 | AFS_CELL_UNSET, | |
363 | AFS_CELL_ACTIVATING, | |
364 | AFS_CELL_ACTIVE, | |
365 | AFS_CELL_DEACTIVATING, | |
366 | AFS_CELL_INACTIVE, | |
367 | AFS_CELL_FAILED, | |
1d0e850a | 368 | AFS_CELL_REMOVED, |
989782dc DH |
369 | }; |
370 | ||
08e0e7c8 | 371 | /* |
d2ddc776 DH |
372 | * AFS cell record. |
373 | * | |
374 | * This is a tricky concept to get right as it is possible to create aliases | |
375 | * simply by pointing AFSDB/SRV records for two names at the same set of VL | |
376 | * servers; it is also possible to do things like setting up two sets of VL | |
377 | * servers, one of which provides a superset of the volumes provided by the | |
378 | * other (for internal/external division, for example). | |
379 | * | |
380 | * Cells only exist in the sense that (a) a cell's name maps to a set of VL | |
381 | * servers and (b) a cell's name is used by the client to select the key to use | |
382 | * for authentication and encryption. The cell name is not typically used in | |
383 | * the protocol. | |
384 | * | |
8a070a96 DH |
385 | * Two cells are determined to be aliases if they have an explicit alias (YFS |
386 | * only), share any VL servers in common or have at least one volume in common. | |
387 | * "In common" means that the address list of the VL servers or the fileservers | |
388 | * share at least one endpoint. | |
08e0e7c8 DH |
389 | */ |
390 | struct afs_cell { | |
989782dc DH |
391 | union { |
392 | struct rcu_head rcu; | |
393 | struct rb_node net_node; /* Node in net->cells */ | |
394 | }; | |
395 | struct afs_net *net; | |
8a070a96 DH |
396 | struct afs_cell *alias_of; /* The cell this is an alias of */ |
397 | struct afs_volume *root_volume; /* The root.cell volume if there is one */ | |
00d3b7a4 | 398 | struct key *anonymous_key; /* anonymous user key for this cell */ |
989782dc | 399 | struct work_struct manager; /* Manager for init/deinit/dns */ |
6b3944e4 | 400 | struct hlist_node proc_link; /* /proc cell list link */ |
989782dc DH |
401 | time64_t dns_expiry; /* Time AFSDB/SRV record expires */ |
402 | time64_t last_inactive; /* Time of last drop of usage count */ | |
c56f9ec8 | 403 | refcount_t ref; /* Struct refcount */ |
88c853c3 | 404 | atomic_t active; /* Active usage counter */ |
989782dc | 405 | unsigned long flags; |
d5c32c89 DH |
406 | #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */ |
407 | #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */ | |
8a070a96 | 408 | #define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */ |
989782dc DH |
409 | enum afs_cell_state state; |
410 | short error; | |
d5c32c89 DH |
411 | enum dns_record_source dns_source:8; /* Latest source of data from lookup */ |
412 | enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */ | |
413 | unsigned int dns_lookup_count; /* Counter of DNS lookups */ | |
dca54a7b | 414 | unsigned int debug_id; |
989782dc | 415 | |
20325960 | 416 | /* The volumes belonging to this cell */ |
32222f09 | 417 | struct rw_semaphore vs_lock; /* Lock for server->volumes */ |
20325960 DH |
418 | struct rb_root volumes; /* Tree of volumes on this server */ |
419 | struct hlist_head proc_volumes; /* procfs volume list */ | |
420 | seqlock_t volume_lock; /* For volumes */ | |
421 | ||
d2ddc776 | 422 | /* Active fileserver interaction state. */ |
20325960 DH |
423 | struct rb_root fs_servers; /* afs_server (by server UUID) */ |
424 | seqlock_t fs_lock; /* For fs_servers */ | |
989782dc | 425 | |
d2ddc776 | 426 | /* VL server list. */ |
0a5143f2 DH |
427 | rwlock_t vl_servers_lock; /* Lock on vl_servers */ |
428 | struct afs_vlserver_list __rcu *vl_servers; | |
429 | ||
989782dc | 430 | u8 name_len; /* Length of name */ |
719fdd32 | 431 | char *name; /* Cell name, case-flattened and NUL-padded */ |
08e0e7c8 DH |
432 | }; |
433 | ||
0a5143f2 DH |
434 | /* |
435 | * Volume Location server record. | |
436 | */ | |
437 | struct afs_vlserver { | |
438 | struct rcu_head rcu; | |
439 | struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */ | |
440 | unsigned long flags; | |
441 | #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ | |
442 | #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ | |
3bf0fb6f | 443 | #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ |
b95b3094 | 444 | #define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */ |
0a5143f2 | 445 | rwlock_t lock; /* Lock on addresses */ |
c56f9ec8 | 446 | refcount_t ref; |
b95b3094 | 447 | unsigned int rtt; /* Server's current RTT in uS */ |
e6a7d7f7 | 448 | unsigned int debug_id; |
3bf0fb6f DH |
449 | |
450 | /* Probe state */ | |
451 | wait_queue_head_t probe_wq; | |
452 | atomic_t probe_outstanding; | |
453 | spinlock_t probe_lock; | |
454 | struct { | |
72904d7b | 455 | unsigned int rtt; /* Best RTT in uS (or UINT_MAX) */ |
3bf0fb6f DH |
456 | u32 abort_code; |
457 | short error; | |
fb72cd3d DH |
458 | unsigned short flags; |
459 | #define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */ | |
460 | #define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */ | |
461 | #define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */ | |
462 | #define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */ | |
3bf0fb6f DH |
463 | } probe; |
464 | ||
e38f299e | 465 | u16 service_id; /* Service ID we're using */ |
0a5143f2 | 466 | u16 port; |
3bf0fb6f | 467 | u16 name_len; /* Length of name */ |
0a5143f2 DH |
468 | char name[]; /* Server name, case-flattened */ |
469 | }; | |
470 | ||
471 | /* | |
472 | * Weighted list of Volume Location servers. | |
473 | */ | |
474 | struct afs_vlserver_entry { | |
475 | u16 priority; /* Preference (as SRV) */ | |
476 | u16 weight; /* Weight (as SRV) */ | |
477 | enum dns_record_source source:8; | |
478 | enum dns_lookup_status status:8; | |
479 | struct afs_vlserver *server; | |
480 | }; | |
481 | ||
482 | struct afs_vlserver_list { | |
483 | struct rcu_head rcu; | |
c56f9ec8 | 484 | refcount_t ref; |
0a5143f2 DH |
485 | u8 nr_servers; |
486 | u8 index; /* Server currently in use */ | |
3bf0fb6f | 487 | u8 preferred; /* Preferred server */ |
0a5143f2 DH |
488 | enum dns_record_source source:8; |
489 | enum dns_lookup_status status:8; | |
490 | rwlock_t lock; | |
491 | struct afs_vlserver_entry servers[]; | |
492 | }; | |
493 | ||
08e0e7c8 | 494 | /* |
d2ddc776 DH |
495 | * Cached VLDB entry. |
496 | * | |
497 | * This is pointed to by cell->vldb_entries, indexed by name. | |
08e0e7c8 | 498 | */ |
d2ddc776 DH |
499 | struct afs_vldb_entry { |
500 | afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ | |
00d3b7a4 | 501 | |
d2ddc776 DH |
502 | unsigned long flags; |
503 | #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ | |
504 | #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ | |
505 | #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ | |
506 | #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ | |
507 | #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ | |
508 | ||
509 | uuid_t fs_server[AFS_NMAXNSERVERS]; | |
81006805 | 510 | u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */ |
d2ddc776 | 511 | u8 fs_mask[AFS_NMAXNSERVERS]; |
08e0e7c8 DH |
512 | #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ |
513 | #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ | |
514 | #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ | |
d3acd81e | 515 | u8 vlsf_flags[AFS_NMAXNSERVERS]; |
d2ddc776 DH |
516 | short error; |
517 | u8 nr_servers; /* Number of server records */ | |
518 | u8 name_len; | |
519 | u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ | |
08e0e7c8 DH |
520 | }; |
521 | ||
f49b594d DH |
522 | /* |
523 | * Fileserver endpoint state. The records the addresses of a fileserver's | |
524 | * endpoints and the state and result of a round of probing on them. This | |
525 | * allows the rotation algorithm to access those results without them being | |
526 | * erased by a subsequent round of probing. | |
527 | */ | |
528 | struct afs_endpoint_state { | |
529 | struct rcu_head rcu; | |
530 | struct afs_addr_list *addresses; /* The addresses being probed */ | |
531 | unsigned long responsive_set; /* Bitset of responsive endpoints */ | |
532 | unsigned long failed_set; /* Bitset of endpoints we failed to probe */ | |
533 | refcount_t ref; | |
534 | unsigned int server_id; /* Debug ID of server */ | |
535 | unsigned int probe_seq; /* Probe sequence (from server::probe_counter) */ | |
f49b594d DH |
536 | atomic_t nr_probing; /* Number of outstanding probes */ |
537 | unsigned int rtt; /* Best RTT in uS (or UINT_MAX) */ | |
538 | s32 abort_code; | |
539 | short error; | |
21c1f410 DH |
540 | unsigned long flags; |
541 | #define AFS_ESTATE_RESPONDED 0 /* Set if the server responded */ | |
542 | #define AFS_ESTATE_SUPERSEDED 1 /* Set if this record has been superseded */ | |
543 | #define AFS_ESTATE_IS_YFS 2 /* Set if probe upgraded to YFS */ | |
544 | #define AFS_ESTATE_NOT_YFS 3 /* Set if probe didn't upgrade to YFS */ | |
545 | #define AFS_ESTATE_LOCAL_FAILURE 4 /* Set if there was a local failure (eg. ENOMEM) */ | |
f49b594d DH |
546 | }; |
547 | ||
08e0e7c8 | 548 | /* |
d2ddc776 | 549 | * Record of fileserver with which we're actively communicating. |
08e0e7c8 DH |
550 | */ |
551 | struct afs_server { | |
d2ddc776 DH |
552 | struct rcu_head rcu; |
553 | union { | |
554 | uuid_t uuid; /* Server ID */ | |
555 | struct afs_uuid _uuid; | |
556 | }; | |
557 | ||
20325960 | 558 | struct afs_cell *cell; /* Cell to which belongs (pins ref) */ |
3c4c4075 DH |
559 | struct rb_node uuid_rb; /* Link in net->fs_servers */ |
560 | struct afs_server __rcu *uuid_next; /* Next server with same UUID */ | |
561 | struct afs_server *uuid_prev; /* Previous server with same UUID */ | |
f6cbb368 | 562 | struct list_head probe_link; /* Link in net->fs_probe_list */ |
bfacaf71 | 563 | struct hlist_node addr_link; /* Link in net->fs_addresses6 */ |
d2ddc776 | 564 | struct hlist_node proc_link; /* Link in net->fs_proc */ |
ca0e79a4 | 565 | struct list_head volumes; /* RCU list of afs_server_entry objects */ |
d2ddc776 | 566 | struct afs_server *gc_next; /* Next server in manager's list */ |
977e5f8e | 567 | time64_t unuse_time; /* Time at which last unused */ |
c435ee34 | 568 | unsigned long flags; |
f3c130e6 | 569 | #define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */ |
32275d3f DH |
570 | #define AFS_SERVER_FL_UPDATING 1 |
571 | #define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */ | |
572 | #define AFS_SERVER_FL_NOT_READY 4 /* The record is not ready for use */ | |
573 | #define AFS_SERVER_FL_NOT_FOUND 5 /* VL server says no such server */ | |
574 | #define AFS_SERVER_FL_VL_FAIL 6 /* Failed to access VL server */ | |
f2686b09 | 575 | #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ |
32275d3f DH |
576 | #define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */ |
577 | #define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */ | |
578 | #define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */ | |
b537a3c2 | 579 | #define AFS_SERVER_FL_HAS_FS64 19 /* Fileserver supports FS.{Fetch,Store}Data64 */ |
c56f9ec8 | 580 | refcount_t ref; /* Object refcount */ |
977e5f8e | 581 | atomic_t active; /* Active user count */ |
d2ddc776 | 582 | u32 addr_version; /* Address list version */ |
e38f299e | 583 | u16 service_id; /* Service ID we're using. */ |
f3c130e6 | 584 | unsigned int rtt; /* Server's current RTT in uS */ |
45218193 | 585 | unsigned int debug_id; /* Debugging ID for traces */ |
08e0e7c8 DH |
586 | |
587 | /* file service access */ | |
d2ddc776 | 588 | rwlock_t fs_lock; /* access lock */ |
08e0e7c8 | 589 | |
3bf0fb6f | 590 | /* Probe state */ |
f49b594d | 591 | struct afs_endpoint_state __rcu *endpoint_state; /* Latest endpoint/probe state */ |
f6cbb368 | 592 | unsigned long probed_at; /* Time last probe was dispatched (jiffies) */ |
3bf0fb6f | 593 | wait_queue_head_t probe_wq; |
f49b594d | 594 | unsigned int probe_counter; /* Number of probes issued */ |
3bf0fb6f | 595 | spinlock_t probe_lock; |
c435ee34 DH |
596 | }; |
597 | ||
d3acd81e DH |
598 | enum afs_ro_replicating { |
599 | AFS_RO_NOT_REPLICATING, /* Not doing replication */ | |
600 | AFS_RO_REPLICATING_USE_OLD, /* Replicating; use old version */ | |
601 | AFS_RO_REPLICATING_USE_NEW, /* Replicating; switch to new version */ | |
602 | } __mode(byte); | |
603 | ||
08e0e7c8 | 604 | /* |
194d28cf | 605 | * Replaceable volume server list. |
d2ddc776 DH |
606 | */ |
607 | struct afs_server_entry { | |
608 | struct afs_server *server; | |
ca0e79a4 DH |
609 | struct afs_volume *volume; |
610 | struct list_head slink; /* Link in server->volumes */ | |
453924de | 611 | time64_t cb_expires_at; /* Time at which volume-level callback expires */ |
d3acd81e DH |
612 | unsigned long flags; |
613 | #define AFS_SE_EXCLUDED 0 /* Set if server is to be excluded in rotation */ | |
28f4c580 DH |
614 | #define AFS_SE_VOLUME_OFFLINE 1 /* Set if volume offline notice given */ |
615 | #define AFS_SE_VOLUME_BUSY 2 /* Set if volume busy notice given */ | |
d2ddc776 DH |
616 | }; |
617 | ||
618 | struct afs_server_list { | |
e6bace73 | 619 | struct rcu_head rcu; |
d2ddc776 | 620 | refcount_t usage; |
ca0e79a4 | 621 | bool attached; /* T if attached to servers */ |
d3acd81e | 622 | enum afs_ro_replicating ro_replicating; /* RW->RO update (probably) in progress */ |
3bf0fb6f | 623 | unsigned char nr_servers; |
d2ddc776 DH |
624 | unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ |
625 | unsigned int seq; /* Set to ->servers_seq when installed */ | |
d4a96bec | 626 | rwlock_t lock; |
d2ddc776 DH |
627 | struct afs_server_entry servers[]; |
628 | }; | |
629 | ||
630 | /* | |
631 | * Live AFS volume management. | |
08e0e7c8 DH |
632 | */ |
633 | struct afs_volume { | |
ca0e79a4 DH |
634 | struct rcu_head rcu; |
635 | afs_volid_t vid; /* The volume ID of this volume */ | |
636 | afs_volid_t vids[AFS_MAXTYPES]; /* All associated volume IDs */ | |
c56f9ec8 | 637 | refcount_t ref; |
d2ddc776 DH |
638 | time64_t update_at; /* Time at which to next update */ |
639 | struct afs_cell *cell; /* Cell to which belongs (pins ref) */ | |
20325960 DH |
640 | struct rb_node cell_node; /* Link in cell->volumes */ |
641 | struct hlist_node proc_link; /* Link in cell->proc_volumes */ | |
642 | struct super_block __rcu *sb; /* Superblock on which inodes reside */ | |
445f9b69 | 643 | struct work_struct destructor; /* Deferred destructor */ |
d2ddc776 DH |
644 | unsigned long flags; |
645 | #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ | |
646 | #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ | |
647 | #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ | |
648 | #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ | |
28f4c580 DH |
649 | #define AFS_VOLUME_MAYBE_NO_IBULK 4 /* - T if some servers don't have InlineBulkStatus */ |
650 | #define AFS_VOLUME_RM_TREE 5 /* - Set if volume removed from cell->volumes */ | |
9b3f26c9 | 651 | #ifdef CONFIG_AFS_FSCACHE |
523d27cd | 652 | struct fscache_volume *cache; /* Caching cookie */ |
08e0e7c8 | 653 | #endif |
8a070a96 | 654 | struct afs_server_list __rcu *servers; /* List of servers on which volume resides */ |
d2ddc776 DH |
655 | rwlock_t servers_lock; /* Lock for ->servers */ |
656 | unsigned int servers_seq; /* Incremented each time ->servers changes */ | |
657 | ||
16069e13 DH |
658 | /* RO release tracking */ |
659 | struct mutex volsync_lock; /* Time/state evaluation lock */ | |
660 | time64_t creation_time; /* Volume creation time (or TIME64_MIN) */ | |
661 | time64_t update_time; /* Volume update time (or TIME64_MIN) */ | |
662 | ||
663 | /* Callback management */ | |
453924de DH |
664 | struct mutex cb_check_lock; /* Lock to control race to check after v_break */ |
665 | time64_t cb_expires_at; /* Earliest volume callback expiry time */ | |
16069e13 DH |
666 | atomic_t cb_ro_snapshot; /* RO volume update-from-snapshot counter */ |
667 | atomic_t cb_v_break; /* Volume-break event counter. */ | |
453924de | 668 | atomic_t cb_v_check; /* Volume-break has-been-checked counter. */ |
16069e13 | 669 | atomic_t cb_scrub; /* Scrub-all-data event counter. */ |
90fa9b64 | 670 | rwlock_t cb_v_break_lock; |
453924de DH |
671 | struct rw_semaphore open_mmaps_lock; |
672 | struct list_head open_mmaps; /* List of vnodes that are mmapped */ | |
68251f0a | 673 | |
08e0e7c8 DH |
674 | afs_voltype_t type; /* type of volume */ |
675 | char type_force; /* force volume type (suppress R/O -> R/W) */ | |
d2ddc776 DH |
676 | u8 name_len; |
677 | u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ | |
08e0e7c8 DH |
678 | }; |
679 | ||
0fafdc9f DH |
680 | enum afs_lock_state { |
681 | AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ | |
682 | AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ | |
683 | AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ | |
684 | AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ | |
685 | AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ | |
686 | AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ | |
687 | AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ | |
cdfb26b4 | 688 | AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */ |
0fafdc9f DH |
689 | }; |
690 | ||
08e0e7c8 | 691 | /* |
f8de483e DH |
692 | * AFS inode private data. |
693 | * | |
694 | * Note that afs_alloc_inode() *must* reset anything that could incorrectly | |
695 | * leak from one inode to another. | |
08e0e7c8 DH |
696 | */ |
697 | struct afs_vnode { | |
874c8ca1 | 698 | struct netfs_inode netfs; /* Netfslib context and vfs inode */ |
08e0e7c8 | 699 | struct afs_volume *volume; /* volume on which vnode resides */ |
08e0e7c8 DH |
700 | struct afs_fid fid; /* the file identifier for this inode */ |
701 | struct afs_file_status status; /* AFS status info for this file */ | |
a4ff7401 | 702 | afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ |
fe342cf7 | 703 | struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ |
d2ddc776 | 704 | struct mutex io_lock; /* Lock for serialising I/O on this mutex */ |
b61f7dcf | 705 | struct rw_semaphore validate_lock; /* lock for validating this vnode */ |
79ddbfa5 DH |
706 | struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ |
707 | struct key *silly_key; /* Silly rename key */ | |
4343d008 | 708 | spinlock_t wb_lock; /* lock for wb_keys */ |
08e0e7c8 DH |
709 | spinlock_t lock; /* waitqueue/flags lock */ |
710 | unsigned long flags; | |
260a9803 | 711 | #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
f3ddee8d | 712 | #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ |
08e0e7c8 DH |
713 | #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ |
714 | #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ | |
715 | #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ | |
0fafdc9f DH |
716 | #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ |
717 | #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ | |
5a813276 | 718 | #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ |
b6489a49 | 719 | #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */ |
22650f14 | 720 | #define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */ |
08e0e7c8 | 721 | |
4343d008 | 722 | struct list_head wb_keys; /* List of keys available for writeback */ |
e8d6c554 DH |
723 | struct list_head pending_locks; /* locks waiting to be granted */ |
724 | struct list_head granted_locks; /* locks granted on this file */ | |
725 | struct delayed_work lock_work; /* work to be done in locking */ | |
0fafdc9f | 726 | struct key *lock_key; /* Key to be used in lock ops */ |
a690f60a | 727 | ktime_t locked_at; /* Time at which lock obtained */ |
0fafdc9f DH |
728 | enum afs_lock_state lock_state : 8; |
729 | afs_lock_type_t lock_type : 8; | |
31143d5d | 730 | |
08e0e7c8 | 731 | /* outstanding callback notification on this file */ |
6e0e99d5 DH |
732 | struct work_struct cb_work; /* Work for mmap'd files */ |
733 | struct list_head cb_mmap_link; /* Link in cell->fs_open_mmaps */ | |
20325960 | 734 | void *cb_server; /* Server with callback/filelock */ |
6e0e99d5 | 735 | atomic_t cb_nr_mmap; /* Number of mmaps */ |
453924de DH |
736 | unsigned int cb_ro_snapshot; /* RO volume release counter on ->volume */ |
737 | unsigned int cb_scrub; /* Scrub counter on ->volume */ | |
c435ee34 | 738 | unsigned int cb_break; /* Break counter on vnode */ |
453924de | 739 | unsigned int cb_v_check; /* Break check counter on ->volume */ |
20325960 | 740 | seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ |
c435ee34 | 741 | |
453924de DH |
742 | atomic64_t cb_expires_at; /* time at which callback expires */ |
743 | #define AFS_NO_CB_PROMISE TIME64_MIN | |
08e0e7c8 DH |
744 | }; |
745 | ||
12bdcf33 DH |
746 | static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) |
747 | { | |
748 | #ifdef CONFIG_AFS_FSCACHE | |
e81fb419 | 749 | return netfs_i_cookie(&vnode->netfs); |
12bdcf33 DH |
750 | #else |
751 | return NULL; | |
752 | #endif | |
753 | } | |
754 | ||
bc899ee1 DH |
755 | static inline void afs_vnode_set_cache(struct afs_vnode *vnode, |
756 | struct fscache_cookie *cookie) | |
757 | { | |
758 | #ifdef CONFIG_AFS_FSCACHE | |
874c8ca1 | 759 | vnode->netfs.cache = cookie; |
b4fa966f DH |
760 | if (cookie) |
761 | mapping_set_release_always(vnode->netfs.inode.i_mapping); | |
bc899ee1 DH |
762 | #endif |
763 | } | |
764 | ||
00d3b7a4 DH |
765 | /* |
766 | * cached security record for one user's attempt to access a vnode | |
767 | */ | |
768 | struct afs_permit { | |
769 | struct key *key; /* RxRPC ticket holding a security context */ | |
be080a6f | 770 | afs_access_t access; /* CallerAccess value for this key */ |
00d3b7a4 DH |
771 | }; |
772 | ||
773 | /* | |
be080a6f DH |
774 | * Immutable cache of CallerAccess records from attempts to access vnodes. |
775 | * These may be shared between multiple vnodes. | |
00d3b7a4 DH |
776 | */ |
777 | struct afs_permits { | |
be080a6f DH |
778 | struct rcu_head rcu; |
779 | struct hlist_node hash_node; /* Link in hash */ | |
780 | unsigned long h; /* Hash value for this permit list */ | |
781 | refcount_t usage; | |
782 | unsigned short nr_permits; /* Number of records */ | |
783 | bool invalidated; /* Invalidated due to key change */ | |
aade1533 | 784 | struct afs_permit permits[] __counted_by(nr_permits); /* List of permits sorted by key pointer */ |
00d3b7a4 DH |
785 | }; |
786 | ||
4584ae96 DH |
787 | /* |
788 | * Error prioritisation and accumulation. | |
789 | */ | |
790 | struct afs_error { | |
aa453bec DH |
791 | s32 abort_code; /* Cumulative abort code */ |
792 | short error; /* Cumulative error */ | |
4584ae96 | 793 | bool responded; /* T if server responded */ |
aa453bec | 794 | bool aborted; /* T if ->error is from an abort */ |
4584ae96 DH |
795 | }; |
796 | ||
0a5143f2 DH |
797 | /* |
798 | * Cursor for iterating over a set of volume location servers. | |
799 | */ | |
800 | struct afs_vl_cursor { | |
0a5143f2 DH |
801 | struct afs_cell *cell; /* The cell we're querying */ |
802 | struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ | |
3bf0fb6f | 803 | struct afs_vlserver *server; /* Server on which this resides */ |
98f9fda2 | 804 | struct afs_addr_list *alist; /* Current address list (pins ref) */ |
0a5143f2 | 805 | struct key *key; /* Key for the server */ |
905b8615 | 806 | unsigned long untried_servers; /* Bitmask of untried servers */ |
98f9fda2 | 807 | unsigned long addr_tried; /* Tried addresses */ |
aa453bec | 808 | struct afs_error cumul_error; /* Cumulative error */ |
98f9fda2 | 809 | unsigned int debug_id; |
aa453bec | 810 | s32 call_abort_code; |
aa453bec | 811 | short call_error; /* Error from single call */ |
905b8615 | 812 | short server_index; /* Current server */ |
98f9fda2 | 813 | signed char addr_index; /* Current address */ |
0a5143f2 DH |
814 | unsigned short flags; |
815 | #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ | |
816 | #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ | |
817 | #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ | |
aa453bec DH |
818 | short nr_iterations; /* Number of server iterations */ |
819 | bool call_responded; /* T if the current address responded */ | |
0a5143f2 DH |
820 | }; |
821 | ||
495f2ae9 DH |
822 | /* |
823 | * Fileserver state tracking for an operation. An array of these is kept, | |
824 | * indexed by server index. | |
825 | */ | |
826 | struct afs_server_state { | |
827 | /* Tracking of fileserver probe state. Other operations may interfere | |
828 | * by probing a fileserver when accessing other volumes. | |
829 | */ | |
830 | unsigned int probe_seq; | |
831 | unsigned long untried_addrs; /* Addresses we haven't tried yet */ | |
832 | struct wait_queue_entry probe_waiter; | |
833 | struct afs_endpoint_state *endpoint_state; /* Endpoint state being monitored */ | |
834 | }; | |
835 | ||
8b2a464c | 836 | /* |
e49c7b2f DH |
837 | * Fileserver operation methods. |
838 | */ | |
839 | struct afs_operation_ops { | |
840 | void (*issue_afs_rpc)(struct afs_operation *op); | |
841 | void (*issue_yfs_rpc)(struct afs_operation *op); | |
842 | void (*success)(struct afs_operation *op); | |
843 | void (*aborted)(struct afs_operation *op); | |
dc419184 | 844 | void (*failed)(struct afs_operation *op); |
e49c7b2f DH |
845 | void (*edit_dir)(struct afs_operation *op); |
846 | void (*put)(struct afs_operation *op); | |
847 | }; | |
848 | ||
849 | struct afs_vnode_param { | |
850 | struct afs_vnode *vnode; | |
851 | struct afs_fid fid; /* Fid to access */ | |
852 | struct afs_status_cb scb; /* Returned status and callback promise */ | |
853 | afs_dataversion_t dv_before; /* Data version before the call */ | |
453924de | 854 | unsigned int cb_break_before; /* cb_break before the call */ |
e49c7b2f | 855 | u8 dv_delta; /* Expected change in data version */ |
793fe82e DH |
856 | bool put_vnode:1; /* T if we have a ref on the vnode */ |
857 | bool need_io_lock:1; /* T if we need the I/O lock on this */ | |
858 | bool update_ctime:1; /* Need to update the ctime */ | |
859 | bool set_size:1; /* Must update i_size */ | |
b6489a49 | 860 | bool op_unlinked:1; /* True if file was unlinked by op */ |
a9e5c87c | 861 | bool speculative:1; /* T if speculative status fetch (no vnode lock) */ |
22650f14 | 862 | bool modification:1; /* Set if the content gets modified */ |
e49c7b2f DH |
863 | }; |
864 | ||
865 | /* | |
866 | * Fileserver operation wrapper, handling server and address rotation | |
867 | * asynchronously. May make simultaneous calls to multiple servers. | |
8b2a464c | 868 | */ |
a310082f | 869 | struct afs_operation { |
e49c7b2f DH |
870 | struct afs_net *net; /* Network namespace */ |
871 | struct key *key; /* Key for the cell */ | |
a58823ac | 872 | const struct afs_call_type *type; /* Type of call done */ |
e49c7b2f DH |
873 | const struct afs_operation_ops *ops; |
874 | ||
875 | /* Parameters/results for the operation */ | |
876 | struct afs_volume *volume; /* Volume being accessed */ | |
877 | struct afs_vnode_param file[2]; | |
878 | struct afs_vnode_param *more_files; | |
16069e13 DH |
879 | struct afs_volsync pre_volsync; /* Volsync before op */ |
880 | struct afs_volsync volsync; /* Volsync returned by op */ | |
e49c7b2f DH |
881 | struct dentry *dentry; /* Dentry to be altered */ |
882 | struct dentry *dentry_2; /* Second dentry to be altered */ | |
883 | struct timespec64 mtime; /* Modification time to record */ | |
da8d0755 | 884 | struct timespec64 ctime; /* Change time to set */ |
aa453bec | 885 | struct afs_error cumul_error; /* Cumulative error */ |
e49c7b2f | 886 | short nr_files; /* Number of entries in file[], more_files */ |
e49c7b2f DH |
887 | unsigned int debug_id; |
888 | ||
889 | unsigned int cb_v_break; /* Volume break counter before op */ | |
e49c7b2f DH |
890 | |
891 | union { | |
892 | struct { | |
893 | int which; /* Which ->file[] to fetch for */ | |
894 | } fetch_status; | |
895 | struct { | |
896 | int reason; /* enum afs_edit_dir_reason */ | |
897 | mode_t mode; | |
898 | const char *symlink; | |
899 | } create; | |
900 | struct { | |
901 | bool need_rehash; | |
902 | } unlink; | |
903 | struct { | |
904 | struct dentry *rehash; | |
905 | struct dentry *tmp; | |
906 | bool new_negative; | |
907 | } rename; | |
908 | struct { | |
909 | struct afs_read *req; | |
910 | } fetch; | |
911 | struct { | |
e49c7b2f DH |
912 | afs_lock_type_t type; |
913 | } lock; | |
914 | struct { | |
bd80d8a8 DH |
915 | struct iov_iter *write_iter; |
916 | loff_t pos; | |
917 | loff_t size; | |
918 | loff_t i_size; | |
e49c7b2f DH |
919 | } store; |
920 | struct { | |
921 | struct iattr *attr; | |
ec0fa0b6 | 922 | loff_t old_i_size; |
e49c7b2f DH |
923 | } setattr; |
924 | struct afs_acl *acl; | |
925 | struct yfs_acl *yacl; | |
926 | struct { | |
927 | struct afs_volume_status vs; | |
928 | struct kstatfs *buf; | |
929 | } volstatus; | |
930 | }; | |
931 | ||
932 | /* Fileserver iteration state */ | |
d2ddc776 | 933 | struct afs_server_list *server_list; /* Current server list (pins ref) */ |
20325960 | 934 | struct afs_server *server; /* Server we're using (ref pinned by server_list) */ |
495f2ae9 DH |
935 | struct afs_endpoint_state *estate; /* Current endpoint state (doesn't pin ref) */ |
936 | struct afs_server_state *server_states; /* States of the servers involved */ | |
e49c7b2f | 937 | struct afs_call *call; |
905b8615 | 938 | unsigned long untried_servers; /* Bitmask of untried servers */ |
98f9fda2 DH |
939 | unsigned long addr_tried; /* Tried addresses */ |
940 | s32 call_abort_code; /* Abort code from single call */ | |
941 | short call_error; /* Error from single call */ | |
905b8615 | 942 | short server_index; /* Current server */ |
075171fd | 943 | short nr_iterations; /* Number of server iterations */ |
98f9fda2 | 944 | signed char addr_index; /* Current address */ |
aa453bec DH |
945 | bool call_responded; /* T if the current address responded */ |
946 | ||
e49c7b2f | 947 | unsigned int flags; |
8409f67b DH |
948 | #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ |
949 | #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ | |
950 | #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ | |
951 | #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ | |
952 | #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ | |
953 | #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ | |
954 | #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ | |
955 | #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ | |
956 | #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ | |
957 | #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ | |
958 | #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ | |
959 | #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ | |
b6489a49 | 960 | #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ |
8b2a464c DH |
961 | }; |
962 | ||
402cb8dd DH |
963 | /* |
964 | * Cache auxiliary data. | |
965 | */ | |
966 | struct afs_vnode_cache_aux { | |
523d27cd | 967 | __be64 data_version; |
402cb8dd DH |
968 | } __packed; |
969 | ||
523d27cd DH |
970 | static inline void afs_set_cache_aux(struct afs_vnode *vnode, |
971 | struct afs_vnode_cache_aux *aux) | |
972 | { | |
973 | aux->data_version = cpu_to_be64(vnode->status.data_version); | |
974 | } | |
975 | ||
976 | static inline void afs_invalidate_cache(struct afs_vnode *vnode, unsigned int flags) | |
977 | { | |
978 | struct afs_vnode_cache_aux aux; | |
979 | ||
980 | afs_set_cache_aux(vnode, &aux); | |
981 | fscache_invalidate(afs_vnode_cache(vnode), &aux, | |
874c8ca1 | 982 | i_size_read(&vnode->netfs.inode), flags); |
523d27cd DH |
983 | } |
984 | ||
98bf40cd DH |
985 | #include <trace/events/afs.h> |
986 | ||
08e0e7c8 | 987 | /*****************************************************************************/ |
8b2a464c DH |
988 | /* |
989 | * addr_list.c | |
990 | */ | |
1e5d8493 | 991 | struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist, enum afs_alist_trace reason); |
e38f299e | 992 | extern struct afs_addr_list *afs_alloc_addrlist(unsigned int nr); |
1e5d8493 | 993 | extern void afs_put_addrlist(struct afs_addr_list *alist, enum afs_alist_trace reason); |
0a5143f2 DH |
994 | extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, |
995 | const char *, size_t, char, | |
996 | unsigned short, unsigned short); | |
07f3502b DH |
997 | bool afs_addr_list_same(const struct afs_addr_list *a, |
998 | const struct afs_addr_list *b); | |
0a5143f2 | 999 | extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); |
8b2a464c | 1000 | |
72904d7b DH |
1001 | extern int afs_merge_fs_addr4(struct afs_net *net, struct afs_addr_list *addr, |
1002 | __be32 xdr, u16 port); | |
1003 | extern int afs_merge_fs_addr6(struct afs_net *net, struct afs_addr_list *addr, | |
1004 | __be32 *xdr, u16 port); | |
d2ddc776 | 1005 | |
f94f70d3 DH |
1006 | /* |
1007 | * addr_prefs.c | |
1008 | */ | |
1009 | int afs_proc_addr_prefs_write(struct file *file, char *buf, size_t size); | |
d14cf8ed DH |
1010 | void afs_get_address_preferences_rcu(struct afs_net *net, struct afs_addr_list *alist); |
1011 | void afs_get_address_preferences(struct afs_net *net, struct afs_addr_list *alist); | |
f94f70d3 | 1012 | |
08e0e7c8 DH |
1013 | /* |
1014 | * callback.c | |
1015 | */ | |
6e0e99d5 | 1016 | extern void afs_invalidate_mmap_work(struct work_struct *); |
08e0e7c8 | 1017 | extern void afs_init_callback_state(struct afs_server *); |
051d2525 DH |
1018 | extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); |
1019 | extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); | |
1020 | extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); | |
c435ee34 | 1021 | |
68251f0a DH |
1022 | static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) |
1023 | { | |
453924de | 1024 | return vnode->cb_break + vnode->cb_ro_snapshot + vnode->cb_scrub; |
68251f0a DH |
1025 | } |
1026 | ||
18ac6185 | 1027 | static inline bool afs_cb_is_broken(unsigned int cb_break, |
20325960 | 1028 | const struct afs_vnode *vnode) |
68251f0a | 1029 | { |
453924de DH |
1030 | return cb_break != (vnode->cb_break + |
1031 | atomic_read(&vnode->volume->cb_ro_snapshot) + | |
1032 | atomic_read(&vnode->volume->cb_scrub)); | |
68251f0a DH |
1033 | } |
1034 | ||
1da177e4 LT |
1035 | /* |
1036 | * cell.c | |
1037 | */ | |
989782dc | 1038 | extern int afs_cell_init(struct afs_net *, const char *); |
dca54a7b DH |
1039 | extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, |
1040 | enum afs_cell_trace); | |
989782dc DH |
1041 | extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, |
1042 | const char *, bool); | |
dca54a7b DH |
1043 | extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); |
1044 | extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace); | |
1045 | extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); | |
1046 | extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); | |
1047 | extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); | |
1048 | extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); | |
989782dc DH |
1049 | extern void afs_manage_cells(struct work_struct *); |
1050 | extern void afs_cells_timer(struct timer_list *); | |
f044c884 | 1051 | extern void __net_exit afs_cell_purge(struct afs_net *); |
08e0e7c8 DH |
1052 | |
1053 | /* | |
1054 | * cmservice.c | |
1055 | */ | |
1056 | extern bool afs_cm_incoming_call(struct afs_call *); | |
1057 | ||
1da177e4 LT |
1058 | /* |
1059 | * dir.c | |
1060 | */ | |
4d673da1 | 1061 | extern const struct file_operations afs_dir_file_operations; |
754661f1 | 1062 | extern const struct inode_operations afs_dir_inode_operations; |
f3ddee8d | 1063 | extern const struct address_space_operations afs_dir_aops; |
d61dcce2 | 1064 | extern const struct dentry_operations afs_fs_dentry_operations; |
4d673da1 | 1065 | |
66c7e1d3 | 1066 | extern void afs_d_release(struct dentry *); |
728279a5 | 1067 | extern void afs_check_for_remote_deletion(struct afs_operation *); |
66c7e1d3 | 1068 | |
63a4681f DH |
1069 | /* |
1070 | * dir_edit.c | |
1071 | */ | |
1072 | extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, | |
1073 | enum afs_edit_dir_reason); | |
1074 | extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); | |
1075 | ||
79ddbfa5 DH |
1076 | /* |
1077 | * dir_silly.c | |
1078 | */ | |
1079 | extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, | |
1080 | struct dentry *, struct key *); | |
1081 | extern int afs_silly_iput(struct dentry *, struct inode *); | |
1082 | ||
66c7e1d3 DH |
1083 | /* |
1084 | * dynroot.c | |
1085 | */ | |
66c7e1d3 DH |
1086 | extern const struct inode_operations afs_dynroot_inode_operations; |
1087 | extern const struct dentry_operations afs_dynroot_dentry_operations; | |
1088 | ||
1089 | extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); | |
0da0b7fd DH |
1090 | extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); |
1091 | extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); | |
1092 | extern int afs_dynroot_populate(struct super_block *); | |
1093 | extern void afs_dynroot_depopulate(struct super_block *); | |
1da177e4 LT |
1094 | |
1095 | /* | |
1096 | * file.c | |
1097 | */ | |
75bd228d DH |
1098 | extern const struct address_space_operations afs_file_aops; |
1099 | extern const struct address_space_operations afs_symlink_aops; | |
754661f1 | 1100 | extern const struct inode_operations afs_file_inode_operations; |
00d3b7a4 | 1101 | extern const struct file_operations afs_file_operations; |
6a19114b | 1102 | extern const struct netfs_request_ops afs_req_ops; |
00d3b7a4 | 1103 | |
4343d008 DH |
1104 | extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); |
1105 | extern void afs_put_wb_key(struct afs_wb_key *); | |
00d3b7a4 DH |
1106 | extern int afs_open(struct inode *, struct file *); |
1107 | extern int afs_release(struct inode *, struct file *); | |
c69bf479 | 1108 | extern int afs_fetch_data(struct afs_vnode *, struct afs_read *); |
5cbf0398 | 1109 | extern struct afs_read *afs_alloc_read(gfp_t); |
196ee9cd | 1110 | extern void afs_put_read(struct afs_read *); |
1da177e4 | 1111 | |
d4438a25 DH |
1112 | static inline struct afs_read *afs_get_read(struct afs_read *req) |
1113 | { | |
1114 | refcount_inc(&req->usage); | |
1115 | return req; | |
1116 | } | |
1117 | ||
e8d6c554 DH |
1118 | /* |
1119 | * flock.c | |
1120 | */ | |
f044c884 DH |
1121 | extern struct workqueue_struct *afs_lock_manager; |
1122 | ||
a690f60a | 1123 | extern void afs_lock_op_done(struct afs_call *); |
e8d6c554 DH |
1124 | extern void afs_lock_work(struct work_struct *); |
1125 | extern void afs_lock_may_be_available(struct afs_vnode *); | |
1126 | extern int afs_lock(struct file *, int, struct file_lock *); | |
1127 | extern int afs_flock(struct file *, int, struct file_lock *); | |
1128 | ||
08e0e7c8 DH |
1129 | /* |
1130 | * fsclient.c | |
1131 | */ | |
e49c7b2f DH |
1132 | extern void afs_fs_fetch_status(struct afs_operation *); |
1133 | extern void afs_fs_fetch_data(struct afs_operation *); | |
1134 | extern void afs_fs_create_file(struct afs_operation *); | |
1135 | extern void afs_fs_make_dir(struct afs_operation *); | |
1136 | extern void afs_fs_remove_file(struct afs_operation *); | |
1137 | extern void afs_fs_remove_dir(struct afs_operation *); | |
1138 | extern void afs_fs_link(struct afs_operation *); | |
1139 | extern void afs_fs_symlink(struct afs_operation *); | |
1140 | extern void afs_fs_rename(struct afs_operation *); | |
1141 | extern void afs_fs_store_data(struct afs_operation *); | |
1142 | extern void afs_fs_setattr(struct afs_operation *); | |
1143 | extern void afs_fs_get_volume_status(struct afs_operation *); | |
1144 | extern void afs_fs_set_lock(struct afs_operation *); | |
1145 | extern void afs_fs_extend_lock(struct afs_operation *); | |
1146 | extern void afs_fs_release_lock(struct afs_operation *); | |
98f9fda2 DH |
1147 | int afs_fs_give_up_all_callbacks(struct afs_net *net, struct afs_server *server, |
1148 | struct afs_address *addr, struct key *key); | |
1149 | bool afs_fs_get_capabilities(struct afs_net *net, struct afs_server *server, | |
f49b594d | 1150 | struct afs_endpoint_state *estate, unsigned int addr_index, |
98f9fda2 | 1151 | struct key *key); |
e49c7b2f | 1152 | extern void afs_fs_inline_bulk_status(struct afs_operation *); |
08e0e7c8 | 1153 | |
260f082b DH |
1154 | struct afs_acl { |
1155 | u32 size; | |
44642564 | 1156 | u8 data[] __counted_by(size); |
260f082b DH |
1157 | }; |
1158 | ||
e49c7b2f DH |
1159 | extern void afs_fs_fetch_acl(struct afs_operation *); |
1160 | extern void afs_fs_store_acl(struct afs_operation *); | |
1161 | ||
1162 | /* | |
1163 | * fs_operation.c | |
1164 | */ | |
1165 | extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); | |
1166 | extern int afs_put_operation(struct afs_operation *); | |
1167 | extern bool afs_begin_vnode_operation(struct afs_operation *); | |
1168 | extern void afs_wait_for_operation(struct afs_operation *); | |
1169 | extern int afs_do_sync_operation(struct afs_operation *); | |
1170 | ||
e49c7b2f DH |
1171 | static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, |
1172 | struct afs_vnode *vnode) | |
1173 | { | |
1174 | op->file[n].vnode = vnode; | |
1175 | op->file[n].need_io_lock = true; | |
1176 | } | |
1177 | ||
1178 | static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, | |
1179 | const struct afs_fid *fid) | |
1180 | { | |
1181 | op->file[n].fid = *fid; | |
1182 | } | |
260f082b | 1183 | |
3bf0fb6f DH |
1184 | /* |
1185 | * fs_probe.c | |
1186 | */ | |
f49b594d DH |
1187 | struct afs_endpoint_state *afs_get_endpoint_state(struct afs_endpoint_state *estate, |
1188 | enum afs_estate_trace where); | |
1189 | void afs_put_endpoint_state(struct afs_endpoint_state *estate, enum afs_estate_trace where); | |
3bf0fb6f | 1190 | extern void afs_fileserver_probe_result(struct afs_call *); |
f49b594d DH |
1191 | void afs_fs_probe_fileserver(struct afs_net *net, struct afs_server *server, |
1192 | struct afs_addr_list *new_addrs, struct key *key); | |
495f2ae9 | 1193 | int afs_wait_for_fs_probes(struct afs_operation *op, struct afs_server_state *states, bool intr); |
8409f67b | 1194 | extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); |
f6cbb368 | 1195 | extern void afs_fs_probe_dispatcher(struct work_struct *); |
f49b594d | 1196 | int afs_wait_for_one_fs_probe(struct afs_server *server, struct afs_endpoint_state *estate, |
495f2ae9 | 1197 | unsigned long exclude, bool is_intr); |
5481fc6e | 1198 | extern void afs_fs_probe_cleanup(struct afs_net *); |
3bf0fb6f | 1199 | |
1da177e4 LT |
1200 | /* |
1201 | * inode.c | |
1202 | */ | |
b6489a49 DH |
1203 | extern const struct afs_operation_ops afs_fetch_status_operation; |
1204 | ||
e49c7b2f | 1205 | extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); |
a58823ac | 1206 | extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); |
e49c7b2f | 1207 | extern int afs_ilookup5_test_by_fid(struct inode *, void *); |
4d673da1 | 1208 | extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); |
e49c7b2f DH |
1209 | extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); |
1210 | extern struct inode *afs_root_iget(struct super_block *, struct key *); | |
b74d24f7 | 1211 | extern int afs_getattr(struct mnt_idmap *idmap, const struct path *, |
549c7297 | 1212 | struct kstat *, u32, unsigned int); |
c1632a0f | 1213 | extern int afs_setattr(struct mnt_idmap *idmap, struct dentry *, struct iattr *); |
b57922d9 | 1214 | extern void afs_evict_inode(struct inode *); |
bec5eb61 | 1215 | extern int afs_drop_inode(struct inode *); |
1da177e4 LT |
1216 | |
1217 | /* | |
1218 | * main.c | |
1219 | */ | |
0ad53eee | 1220 | extern struct workqueue_struct *afs_wq; |
5b86d4ff | 1221 | extern int afs_net_id; |
f044c884 | 1222 | |
5b86d4ff | 1223 | static inline struct afs_net *afs_net(struct net *net) |
f044c884 | 1224 | { |
5b86d4ff | 1225 | return net_generic(net, afs_net_id); |
f044c884 DH |
1226 | } |
1227 | ||
5b86d4ff | 1228 | static inline struct afs_net *afs_sb2net(struct super_block *sb) |
f044c884 | 1229 | { |
5b86d4ff | 1230 | return afs_net(AFS_FS_S(sb)->net_ns); |
f044c884 DH |
1231 | } |
1232 | ||
5b86d4ff | 1233 | static inline struct afs_net *afs_d2net(struct dentry *dentry) |
f044c884 | 1234 | { |
5b86d4ff | 1235 | return afs_sb2net(dentry->d_sb); |
f044c884 DH |
1236 | } |
1237 | ||
5b86d4ff | 1238 | static inline struct afs_net *afs_i2net(struct inode *inode) |
f044c884 | 1239 | { |
5b86d4ff | 1240 | return afs_sb2net(inode->i_sb); |
f044c884 DH |
1241 | } |
1242 | ||
5b86d4ff | 1243 | static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) |
f044c884 | 1244 | { |
874c8ca1 | 1245 | return afs_i2net(&vnode->netfs.inode); |
f044c884 DH |
1246 | } |
1247 | ||
5b86d4ff | 1248 | static inline struct afs_net *afs_sock2net(struct sock *sk) |
f044c884 | 1249 | { |
5b86d4ff | 1250 | return net_generic(sock_net(sk), afs_net_id); |
f044c884 | 1251 | } |
1da177e4 | 1252 | |
d55b4da4 DH |
1253 | static inline void __afs_stat(atomic_t *s) |
1254 | { | |
1255 | atomic_inc(s); | |
1256 | } | |
1257 | ||
1258 | #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) | |
1259 | ||
08e0e7c8 DH |
1260 | /* |
1261 | * misc.c | |
1262 | */ | |
1263 | extern int afs_abort_to_error(u32); | |
4584ae96 | 1264 | extern void afs_prioritise_error(struct afs_error *, int, u32); |
08e0e7c8 | 1265 | |
2de5599f DH |
1266 | static inline void afs_op_nomem(struct afs_operation *op) |
1267 | { | |
aa453bec | 1268 | op->cumul_error.error = -ENOMEM; |
2de5599f DH |
1269 | } |
1270 | ||
1271 | static inline int afs_op_error(const struct afs_operation *op) | |
1272 | { | |
aa453bec DH |
1273 | return op->cumul_error.error; |
1274 | } | |
1275 | ||
1276 | static inline s32 afs_op_abort_code(const struct afs_operation *op) | |
1277 | { | |
1278 | return op->cumul_error.abort_code; | |
2de5599f DH |
1279 | } |
1280 | ||
1281 | static inline int afs_op_set_error(struct afs_operation *op, int error) | |
1282 | { | |
aa453bec DH |
1283 | return op->cumul_error.error = error; |
1284 | } | |
1285 | ||
1286 | static inline void afs_op_accumulate_error(struct afs_operation *op, int error, s32 abort_code) | |
1287 | { | |
1288 | afs_prioritise_error(&op->cumul_error, error, abort_code); | |
2de5599f DH |
1289 | } |
1290 | ||
1da177e4 LT |
1291 | /* |
1292 | * mntpt.c | |
1293 | */ | |
754661f1 | 1294 | extern const struct inode_operations afs_mntpt_inode_operations; |
bec5eb61 | 1295 | extern const struct inode_operations afs_autocell_inode_operations; |
4b6f5d20 | 1296 | extern const struct file_operations afs_mntpt_file_operations; |
1da177e4 | 1297 | |
d18610b0 | 1298 | extern struct vfsmount *afs_d_automount(struct path *); |
08e0e7c8 | 1299 | extern void afs_mntpt_kill_timer(void); |
1da177e4 | 1300 | |
1da177e4 LT |
1301 | /* |
1302 | * proc.c | |
1303 | */ | |
b6cfbeca | 1304 | #ifdef CONFIG_PROC_FS |
f044c884 DH |
1305 | extern int __net_init afs_proc_init(struct afs_net *); |
1306 | extern void __net_exit afs_proc_cleanup(struct afs_net *); | |
5b86d4ff DH |
1307 | extern int afs_proc_cell_setup(struct afs_cell *); |
1308 | extern void afs_proc_cell_remove(struct afs_cell *); | |
6f8880d8 | 1309 | extern void afs_put_sysnames(struct afs_sysnames *); |
b6cfbeca DH |
1310 | #else |
1311 | static inline int afs_proc_init(struct afs_net *net) { return 0; } | |
1312 | static inline void afs_proc_cleanup(struct afs_net *net) {} | |
1313 | static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } | |
1314 | static inline void afs_proc_cell_remove(struct afs_cell *cell) {} | |
1315 | static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} | |
1316 | #endif | |
1da177e4 | 1317 | |
d2ddc776 DH |
1318 | /* |
1319 | * rotate.c | |
1320 | */ | |
495f2ae9 | 1321 | void afs_clear_server_states(struct afs_operation *op); |
a310082f | 1322 | extern bool afs_select_fileserver(struct afs_operation *); |
e49c7b2f | 1323 | extern void afs_dump_edestaddrreq(const struct afs_operation *); |
d2ddc776 | 1324 | |
08e0e7c8 DH |
1325 | /* |
1326 | * rxrpc.c | |
1327 | */ | |
f044c884 | 1328 | extern struct workqueue_struct *afs_async_calls; |
8324f0bc | 1329 | |
f044c884 DH |
1330 | extern int __net_init afs_open_socket(struct afs_net *); |
1331 | extern void __net_exit afs_close_socket(struct afs_net *); | |
1332 | extern void afs_charge_preallocation(struct work_struct *); | |
341f741f | 1333 | extern void afs_put_call(struct afs_call *); |
98f9fda2 DH |
1334 | void afs_make_call(struct afs_call *call, gfp_t gfp); |
1335 | void afs_wait_for_call_to_complete(struct afs_call *call); | |
f044c884 DH |
1336 | extern struct afs_call *afs_alloc_flat_call(struct afs_net *, |
1337 | const struct afs_call_type *, | |
08e0e7c8 DH |
1338 | size_t, size_t); |
1339 | extern void afs_flat_call_destructor(struct afs_call *); | |
08e0e7c8 | 1340 | extern void afs_send_empty_reply(struct afs_call *); |
b908fe6b | 1341 | extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); |
12bdcf33 | 1342 | extern int afs_extract_data(struct afs_call *, bool); |
7126ead9 | 1343 | extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); |
08e0e7c8 | 1344 | |
e49c7b2f DH |
1345 | static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, |
1346 | gfp_t gfp) | |
20b8391f | 1347 | { |
f49b594d DH |
1348 | struct afs_addr_list *alist = op->estate->addresses; |
1349 | ||
e38f299e DH |
1350 | op->call = call; |
1351 | op->type = call->type; | |
1352 | call->op = op; | |
1353 | call->key = op->key; | |
1354 | call->intr = !(op->flags & AFS_OPERATION_UNINTR); | |
f49b594d | 1355 | call->peer = rxrpc_kernel_get_peer(alist->addrs[op->addr_index].peer); |
e38f299e | 1356 | call->service_id = op->server->service_id; |
98f9fda2 | 1357 | afs_make_call(call, gfp); |
20b8391f DH |
1358 | } |
1359 | ||
12bdcf33 DH |
1360 | static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) |
1361 | { | |
f105da1a | 1362 | call->iov_len = size; |
12bdcf33 DH |
1363 | call->kvec[0].iov_base = buf; |
1364 | call->kvec[0].iov_len = size; | |
de4eda9d | 1365 | iov_iter_kvec(&call->def_iter, ITER_DEST, call->kvec, 1, size); |
12bdcf33 DH |
1366 | } |
1367 | ||
1368 | static inline void afs_extract_to_tmp(struct afs_call *call) | |
1369 | { | |
f105da1a | 1370 | call->iov_len = sizeof(call->tmp); |
12bdcf33 DH |
1371 | afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); |
1372 | } | |
1373 | ||
1374 | static inline void afs_extract_to_tmp64(struct afs_call *call) | |
1375 | { | |
f105da1a | 1376 | call->iov_len = sizeof(call->tmp64); |
12bdcf33 DH |
1377 | afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); |
1378 | } | |
1379 | ||
1380 | static inline void afs_extract_discard(struct afs_call *call, size_t size) | |
1381 | { | |
f105da1a | 1382 | call->iov_len = size; |
de4eda9d | 1383 | iov_iter_discard(&call->def_iter, ITER_DEST, size); |
12bdcf33 DH |
1384 | } |
1385 | ||
1386 | static inline void afs_extract_to_buf(struct afs_call *call, size_t size) | |
1387 | { | |
f105da1a | 1388 | call->iov_len = size; |
12bdcf33 DH |
1389 | afs_extract_begin(call, call->buffer, size); |
1390 | } | |
1391 | ||
d001648e | 1392 | static inline int afs_transfer_reply(struct afs_call *call) |
372ee163 | 1393 | { |
12bdcf33 | 1394 | return afs_extract_data(call, false); |
372ee163 DH |
1395 | } |
1396 | ||
98bf40cd DH |
1397 | static inline bool afs_check_call_state(struct afs_call *call, |
1398 | enum afs_call_state state) | |
1399 | { | |
1400 | return READ_ONCE(call->state) == state; | |
1401 | } | |
1402 | ||
1403 | static inline bool afs_set_call_state(struct afs_call *call, | |
1404 | enum afs_call_state from, | |
1405 | enum afs_call_state to) | |
1406 | { | |
1407 | bool ok = false; | |
1408 | ||
1409 | spin_lock_bh(&call->state_lock); | |
1410 | if (call->state == from) { | |
1411 | call->state = to; | |
1412 | trace_afs_call_state(call, from, to, 0, 0); | |
1413 | ok = true; | |
1414 | } | |
1415 | spin_unlock_bh(&call->state_lock); | |
1416 | return ok; | |
1417 | } | |
1418 | ||
1419 | static inline void afs_set_call_complete(struct afs_call *call, | |
1420 | int error, u32 remote_abort) | |
1421 | { | |
1422 | enum afs_call_state state; | |
1423 | bool ok = false; | |
1424 | ||
1425 | spin_lock_bh(&call->state_lock); | |
1426 | state = call->state; | |
1427 | if (state != AFS_CALL_COMPLETE) { | |
1428 | call->abort_code = remote_abort; | |
1429 | call->error = error; | |
1430 | call->state = AFS_CALL_COMPLETE; | |
1431 | trace_afs_call_state(call, state, AFS_CALL_COMPLETE, | |
1432 | error, remote_abort); | |
1433 | ok = true; | |
1434 | } | |
1435 | spin_unlock_bh(&call->state_lock); | |
dde9f095 | 1436 | if (ok) { |
98bf40cd | 1437 | trace_afs_call_done(call); |
dde9f095 DH |
1438 | |
1439 | /* Asynchronous calls have two refs to release - one from the alloc and | |
1440 | * one queued with the work item - and we can't just deallocate the | |
1441 | * call because the work item may be queued again. | |
1442 | */ | |
1443 | if (call->drop_ref) | |
1444 | afs_put_call(call); | |
1445 | } | |
98bf40cd DH |
1446 | } |
1447 | ||
00d3b7a4 DH |
1448 | /* |
1449 | * security.c | |
1450 | */ | |
be080a6f | 1451 | extern void afs_put_permits(struct afs_permits *); |
00d3b7a4 | 1452 | extern void afs_clear_permits(struct afs_vnode *); |
a58823ac DH |
1453 | extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, |
1454 | struct afs_status_cb *); | |
00d3b7a4 | 1455 | extern struct key *afs_request_key(struct afs_cell *); |
8b6a666a | 1456 | extern struct key *afs_request_key_rcu(struct afs_cell *); |
0fafdc9f | 1457 | extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); |
4609e1f1 | 1458 | extern int afs_permission(struct mnt_idmap *, struct inode *, int); |
be080a6f | 1459 | extern void __exit afs_clean_up_permit_cache(void); |
00d3b7a4 | 1460 | |
08e0e7c8 DH |
1461 | /* |
1462 | * server.c | |
1463 | */ | |
1464 | extern spinlock_t afs_server_peer_lock; | |
1465 | ||
72904d7b | 1466 | extern struct afs_server *afs_find_server(struct afs_net *, const struct rxrpc_peer *); |
d2ddc776 | 1467 | extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); |
81006805 | 1468 | extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); |
45218193 | 1469 | extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); |
977e5f8e DH |
1470 | extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace); |
1471 | extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace); | |
1472 | extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace); | |
45218193 | 1473 | extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); |
d2ddc776 DH |
1474 | extern void afs_manage_servers(struct work_struct *); |
1475 | extern void afs_servers_timer(struct timer_list *); | |
f6cbb368 | 1476 | extern void afs_fs_probe_timer(struct timer_list *); |
f044c884 | 1477 | extern void __net_exit afs_purge_servers(struct afs_net *); |
f49b594d | 1478 | bool afs_check_server_record(struct afs_operation *op, struct afs_server *server, struct key *key); |
08e0e7c8 | 1479 | |
f6cbb368 DH |
1480 | static inline void afs_inc_servers_outstanding(struct afs_net *net) |
1481 | { | |
1482 | atomic_inc(&net->servers_outstanding); | |
1483 | } | |
1484 | ||
1485 | static inline void afs_dec_servers_outstanding(struct afs_net *net) | |
1486 | { | |
1487 | if (atomic_dec_and_test(&net->servers_outstanding)) | |
1488 | wake_up_var(&net->servers_outstanding); | |
1489 | } | |
1490 | ||
1491 | static inline bool afs_is_probing_server(struct afs_server *server) | |
1492 | { | |
1493 | return list_empty(&server->probe_link); | |
1494 | } | |
1495 | ||
00d3b7a4 | 1496 | /* |
d2ddc776 | 1497 | * server_list.c |
00d3b7a4 | 1498 | */ |
d2ddc776 DH |
1499 | static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) |
1500 | { | |
1501 | refcount_inc(&slist->usage); | |
1502 | return slist; | |
1503 | } | |
00d3b7a4 | 1504 | |
d2ddc776 | 1505 | extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); |
ca0e79a4 DH |
1506 | struct afs_server_list *afs_alloc_server_list(struct afs_volume *volume, |
1507 | struct key *key, | |
1508 | struct afs_vldb_entry *vldb); | |
d2ddc776 | 1509 | extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); |
ca0e79a4 DH |
1510 | void afs_attach_volume_to_servers(struct afs_volume *volume, struct afs_server_list *slist); |
1511 | void afs_reattach_volume_to_servers(struct afs_volume *volume, struct afs_server_list *slist, | |
1512 | struct afs_server_list *old); | |
1513 | void afs_detach_volume_from_servers(struct afs_volume *volume, struct afs_server_list *slist); | |
08e0e7c8 DH |
1514 | |
1515 | /* | |
d2ddc776 | 1516 | * super.c |
08e0e7c8 | 1517 | */ |
d2ddc776 | 1518 | extern int __init afs_fs_init(void); |
5b86d4ff | 1519 | extern void afs_fs_exit(void); |
08e0e7c8 | 1520 | |
dfa0a449 DH |
1521 | /* |
1522 | * validation.c | |
1523 | */ | |
453924de | 1524 | bool afs_check_validity(const struct afs_vnode *vnode); |
16069e13 | 1525 | int afs_update_volume_state(struct afs_operation *op); |
dfa0a449 DH |
1526 | int afs_validate(struct afs_vnode *vnode, struct key *key); |
1527 | ||
08e0e7c8 | 1528 | /* |
d2ddc776 | 1529 | * vlclient.c |
08e0e7c8 | 1530 | */ |
0a5143f2 DH |
1531 | extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, |
1532 | const char *, int); | |
1533 | extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); | |
98f9fda2 DH |
1534 | struct afs_call *afs_vl_get_capabilities(struct afs_net *net, |
1535 | struct afs_addr_list *alist, | |
1536 | unsigned int addr_index, | |
1537 | struct key *key, | |
1538 | struct afs_vlserver *server, | |
1539 | unsigned int server_index); | |
0a5143f2 | 1540 | extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); |
c3e9f888 | 1541 | extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); |
0a5143f2 | 1542 | |
8a070a96 DH |
1543 | /* |
1544 | * vl_alias.c | |
1545 | */ | |
1546 | extern int afs_cell_detect_alias(struct afs_cell *, struct key *); | |
1547 | ||
3bf0fb6f DH |
1548 | /* |
1549 | * vl_probe.c | |
1550 | */ | |
1551 | extern void afs_vlserver_probe_result(struct afs_call *); | |
1552 | extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); | |
1553 | extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); | |
1554 | ||
0a5143f2 DH |
1555 | /* |
1556 | * vl_rotate.c | |
1557 | */ | |
1558 | extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, | |
1559 | struct afs_cell *, struct key *); | |
1560 | extern bool afs_select_vlserver(struct afs_vl_cursor *); | |
1561 | extern bool afs_select_current_vlserver(struct afs_vl_cursor *); | |
1562 | extern int afs_end_vlserver_operation(struct afs_vl_cursor *); | |
1563 | ||
1564 | /* | |
1565 | * vlserver_list.c | |
1566 | */ | |
1567 | static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) | |
1568 | { | |
c56f9ec8 | 1569 | refcount_inc(&vlserver->ref); |
0a5143f2 DH |
1570 | return vlserver; |
1571 | } | |
1572 | ||
1573 | static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) | |
1574 | { | |
1575 | if (vllist) | |
c56f9ec8 | 1576 | refcount_inc(&vllist->ref); |
0a5143f2 DH |
1577 | return vllist; |
1578 | } | |
1579 | ||
1580 | extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); | |
1581 | extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); | |
1582 | extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); | |
1583 | extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); | |
1584 | extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, | |
1585 | const void *, size_t); | |
08e0e7c8 DH |
1586 | |
1587 | /* | |
1588 | * volume.c | |
1589 | */ | |
13fcc683 | 1590 | extern struct afs_volume *afs_create_volume(struct afs_fs_context *); |
523d27cd | 1591 | extern int afs_activate_volume(struct afs_volume *); |
d2ddc776 | 1592 | extern void afs_deactivate_volume(struct afs_volume *); |
9a6b294a | 1593 | bool afs_try_get_volume(struct afs_volume *volume, enum afs_volume_trace reason); |
cca37d45 | 1594 | extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); |
445f9b69 | 1595 | void afs_put_volume(struct afs_volume *volume, enum afs_volume_trace reason); |
a310082f | 1596 | extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); |
08e0e7c8 | 1597 | |
31143d5d DH |
1598 | /* |
1599 | * write.c | |
1600 | */ | |
ed22e1db DH |
1601 | void afs_prepare_write(struct netfs_io_subrequest *subreq); |
1602 | void afs_issue_write(struct netfs_io_subrequest *subreq); | |
1603 | void afs_begin_writeback(struct netfs_io_request *wreq); | |
1ecb146f | 1604 | void afs_retry_request(struct netfs_io_request *wreq, struct netfs_io_stream *stream); |
31143d5d | 1605 | extern int afs_writepages(struct address_space *, struct writeback_control *); |
02c24a82 | 1606 | extern int afs_fsync(struct file *, loff_t, loff_t, int); |
0722f186 | 1607 | extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); |
4343d008 | 1608 | extern void afs_prune_wb_keys(struct afs_vnode *); |
31143d5d | 1609 | |
d3e3b7ea DH |
1610 | /* |
1611 | * xattr.c | |
1612 | */ | |
f710c2e4 | 1613 | extern const struct xattr_handler * const afs_xattr_handlers[]; |
31143d5d | 1614 | |
30062bd1 DH |
1615 | /* |
1616 | * yfsclient.c | |
1617 | */ | |
e49c7b2f DH |
1618 | extern void yfs_fs_fetch_data(struct afs_operation *); |
1619 | extern void yfs_fs_create_file(struct afs_operation *); | |
1620 | extern void yfs_fs_make_dir(struct afs_operation *); | |
1621 | extern void yfs_fs_remove_file2(struct afs_operation *); | |
1622 | extern void yfs_fs_remove_file(struct afs_operation *); | |
1623 | extern void yfs_fs_remove_dir(struct afs_operation *); | |
1624 | extern void yfs_fs_link(struct afs_operation *); | |
1625 | extern void yfs_fs_symlink(struct afs_operation *); | |
1626 | extern void yfs_fs_rename(struct afs_operation *); | |
1627 | extern void yfs_fs_store_data(struct afs_operation *); | |
1628 | extern void yfs_fs_setattr(struct afs_operation *); | |
1629 | extern void yfs_fs_get_volume_status(struct afs_operation *); | |
1630 | extern void yfs_fs_set_lock(struct afs_operation *); | |
1631 | extern void yfs_fs_extend_lock(struct afs_operation *); | |
1632 | extern void yfs_fs_release_lock(struct afs_operation *); | |
1633 | extern void yfs_fs_fetch_status(struct afs_operation *); | |
1634 | extern void yfs_fs_inline_bulk_status(struct afs_operation *); | |
d2ddc776 | 1635 | |
ae46578b DH |
1636 | struct yfs_acl { |
1637 | struct afs_acl *acl; /* Dir/file/symlink ACL */ | |
1638 | struct afs_acl *vol_acl; /* Whole volume ACL */ | |
1639 | u32 inherit_flag; /* True if ACL is inherited from parent dir */ | |
1640 | u32 num_cleaned; /* Number of ACEs removed due to subject removal */ | |
1641 | unsigned int flags; | |
1642 | #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ | |
1643 | #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ | |
1644 | }; | |
1645 | ||
1646 | extern void yfs_free_opaque_acl(struct yfs_acl *); | |
e49c7b2f DH |
1647 | extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); |
1648 | extern void yfs_fs_store_opaque_acl2(struct afs_operation *); | |
ae46578b | 1649 | |
d2ddc776 DH |
1650 | /* |
1651 | * Miscellaneous inline functions. | |
1652 | */ | |
1653 | static inline struct afs_vnode *AFS_FS_I(struct inode *inode) | |
1654 | { | |
874c8ca1 | 1655 | return container_of(inode, struct afs_vnode, netfs.inode); |
d2ddc776 DH |
1656 | } |
1657 | ||
1658 | static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) | |
1659 | { | |
874c8ca1 | 1660 | return &vnode->netfs.inode; |
d2ddc776 DH |
1661 | } |
1662 | ||
e49c7b2f DH |
1663 | /* |
1664 | * Note that a dentry got changed. We need to set d_fsdata to the data version | |
1665 | * number derived from the result of the operation. It doesn't matter if | |
1666 | * d_fsdata goes backwards as we'll just revalidate. | |
1667 | */ | |
1668 | static inline void afs_update_dentry_version(struct afs_operation *op, | |
1669 | struct afs_vnode_param *dir_vp, | |
1670 | struct dentry *dentry) | |
1671 | { | |
aa453bec | 1672 | if (!op->cumul_error.error) |
e49c7b2f DH |
1673 | dentry->d_fsdata = |
1674 | (void *)(unsigned long)dir_vp->scb.status.data_version; | |
1675 | } | |
1676 | ||
9d37e1ca DH |
1677 | /* |
1678 | * Set the file size and block count. Estimate the number of 512 bytes blocks | |
1679 | * used, rounded up to nearest 1K for consistency with other AFS clients. | |
1680 | */ | |
1681 | static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size) | |
1682 | { | |
874c8ca1 DH |
1683 | i_size_write(&vnode->netfs.inode, size); |
1684 | vnode->netfs.inode.i_blocks = ((size + 1023) >> 10) << 1; | |
9d37e1ca DH |
1685 | } |
1686 | ||
b6489a49 DH |
1687 | /* |
1688 | * Check for a conflicting operation on a directory that we just unlinked from. | |
1689 | * If someone managed to sneak a link or an unlink in on the file we just | |
1690 | * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). | |
1691 | */ | |
1692 | static inline void afs_check_dir_conflict(struct afs_operation *op, | |
1693 | struct afs_vnode_param *dvp) | |
1694 | { | |
1695 | if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) | |
1696 | op->flags |= AFS_OPERATION_DIR_CONFLICT; | |
1697 | } | |
1698 | ||
f51375cd DH |
1699 | static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) |
1700 | { | |
1701 | trace_afs_io_error(call->debug_id, -EIO, where); | |
1702 | return -EIO; | |
1703 | } | |
1704 | ||
1705 | static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) | |
1706 | { | |
1707 | trace_afs_file_error(vnode, -EIO, where); | |
1708 | return -EIO; | |
1709 | } | |
d2ddc776 | 1710 | |
08e0e7c8 DH |
1711 | /*****************************************************************************/ |
1712 | /* | |
1713 | * debug tracing | |
1714 | */ | |
1715 | extern unsigned afs_debug; | |
1716 | ||
1717 | #define dbgprintk(FMT,...) \ | |
ad16df84 | 1718 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
08e0e7c8 | 1719 | |
530b6412 HH |
1720 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1721 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
08e0e7c8 DH |
1722 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
1723 | ||
1724 | ||
1725 | #if defined(__KDEBUG) | |
1726 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
1727 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
1728 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
1729 | ||
1730 | #elif defined(CONFIG_AFS_DEBUG) | |
1731 | #define AFS_DEBUG_KENTER 0x01 | |
1732 | #define AFS_DEBUG_KLEAVE 0x02 | |
1733 | #define AFS_DEBUG_KDEBUG 0x04 | |
1734 | ||
1735 | #define _enter(FMT,...) \ | |
1736 | do { \ | |
1737 | if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ | |
1738 | kenter(FMT,##__VA_ARGS__); \ | |
1739 | } while (0) | |
1740 | ||
1741 | #define _leave(FMT,...) \ | |
1742 | do { \ | |
1743 | if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ | |
1744 | kleave(FMT,##__VA_ARGS__); \ | |
1745 | } while (0) | |
1746 | ||
1747 | #define _debug(FMT,...) \ | |
1748 | do { \ | |
1749 | if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ | |
1750 | kdebug(FMT,##__VA_ARGS__); \ | |
1751 | } while (0) | |
1752 | ||
1753 | #else | |
12fdff3f DH |
1754 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1755 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
1756 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
08e0e7c8 DH |
1757 | #endif |
1758 | ||
1759 | /* | |
1760 | * debug assertion checking | |
1761 | */ | |
1762 | #if 1 // defined(__KDEBUGALL) | |
1763 | ||
1764 | #define ASSERT(X) \ | |
1765 | do { \ | |
1766 | if (unlikely(!(X))) { \ | |
1767 | printk(KERN_ERR "\n"); \ | |
1768 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1769 | BUG(); \ | |
1770 | } \ | |
1771 | } while(0) | |
1772 | ||
1773 | #define ASSERTCMP(X, OP, Y) \ | |
1774 | do { \ | |
1775 | if (unlikely(!((X) OP (Y)))) { \ | |
1776 | printk(KERN_ERR "\n"); \ | |
1777 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1778 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
1779 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1780 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
1781 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1782 | BUG(); \ | |
1783 | } \ | |
1784 | } while(0) | |
1785 | ||
416351f2 DH |
1786 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
1787 | do { \ | |
1788 | if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ | |
1789 | printk(KERN_ERR "\n"); \ | |
1790 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1791 | printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ | |
1792 | (unsigned long)(L), (unsigned long)(N), \ | |
1793 | (unsigned long)(H)); \ | |
1794 | printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ | |
1795 | (unsigned long)(L), (unsigned long)(N), \ | |
1796 | (unsigned long)(H)); \ | |
1797 | BUG(); \ | |
1798 | } \ | |
1799 | } while(0) | |
1800 | ||
08e0e7c8 DH |
1801 | #define ASSERTIF(C, X) \ |
1802 | do { \ | |
1803 | if (unlikely((C) && !(X))) { \ | |
1804 | printk(KERN_ERR "\n"); \ | |
1805 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1806 | BUG(); \ | |
1807 | } \ | |
1808 | } while(0) | |
1809 | ||
1810 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1811 | do { \ | |
1812 | if (unlikely((C) && !((X) OP (Y)))) { \ | |
1813 | printk(KERN_ERR "\n"); \ | |
1814 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1815 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
1816 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1817 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
1818 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1819 | BUG(); \ | |
1820 | } \ | |
1821 | } while(0) | |
1822 | ||
1823 | #else | |
1824 | ||
1825 | #define ASSERT(X) \ | |
1826 | do { \ | |
1827 | } while(0) | |
1828 | ||
1829 | #define ASSERTCMP(X, OP, Y) \ | |
1830 | do { \ | |
1831 | } while(0) | |
1832 | ||
416351f2 DH |
1833 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
1834 | do { \ | |
1835 | } while(0) | |
1836 | ||
08e0e7c8 DH |
1837 | #define ASSERTIF(C, X) \ |
1838 | do { \ | |
1839 | } while(0) | |
1840 | ||
1841 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1842 | do { \ | |
1843 | } while(0) | |
1844 | ||
1845 | #endif /* __KDEBUGALL */ |