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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 LT |
11 | #include <linux/fs.h> |
12 | #include <linux/pagemap.h> | |
08e0e7c8 | 13 | #include <linux/rxrpc.h> |
00d3b7a4 | 14 | #include <linux/key.h> |
e8edc6e0 | 15 | #include <linux/workqueue.h> |
00c541ea | 16 | #include <linux/sched.h> |
80e50be4 | 17 | #include <linux/fscache.h> |
e1da0222 | 18 | #include <linux/backing-dev.h> |
ff548773 | 19 | #include <linux/uuid.h> |
0722f186 | 20 | #include <linux/mm_types.h> |
0a5143f2 | 21 | #include <linux/dns_resolver.h> |
f044c884 | 22 | #include <net/net_namespace.h> |
5b86d4ff DH |
23 | #include <net/netns/generic.h> |
24 | #include <net/sock.h> | |
8324f0bc | 25 | #include <net/af_rxrpc.h> |
00c541ea | 26 | |
08e0e7c8 DH |
27 | #include "afs.h" |
28 | #include "afs_vl.h" | |
29 | ||
30 | #define AFS_CELL_MAX_ADDRS 15 | |
31 | ||
31143d5d | 32 | struct pagevec; |
08e0e7c8 DH |
33 | struct afs_call; |
34 | ||
6c6c1d63 DH |
35 | /* |
36 | * Partial file-locking emulation mode. (The problem being that AFS3 only | |
37 | * allows whole-file locks and no upgrading/downgrading). | |
38 | */ | |
39 | enum afs_flock_mode { | |
40 | afs_flock_mode_unset, | |
41 | afs_flock_mode_local, /* Local locking only */ | |
42 | afs_flock_mode_openafs, /* Don't get server lock for a partial lock */ | |
43 | afs_flock_mode_strict, /* Always get a server lock for a partial lock */ | |
44 | afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */ | |
45 | }; | |
46 | ||
13fcc683 | 47 | struct afs_fs_context { |
00d3b7a4 | 48 | bool force; /* T to force cell type */ |
bec5eb61 | 49 | bool autocell; /* T if set auto mount operation */ |
4d673da1 | 50 | bool dyn_root; /* T if dynamic root */ |
13fcc683 | 51 | bool no_cell; /* T if the source is "none" (for dynroot) */ |
6c6c1d63 | 52 | enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */ |
00d3b7a4 | 53 | afs_voltype_t type; /* type of volume requested */ |
13fcc683 | 54 | unsigned int volnamesz; /* size of volume name */ |
00d3b7a4 | 55 | const char *volname; /* name of volume to mount */ |
5b86d4ff | 56 | struct afs_net *net; /* the AFS net namespace stuff */ |
00d3b7a4 DH |
57 | struct afs_cell *cell; /* cell in which to find volume */ |
58 | struct afs_volume *volume; /* volume record */ | |
59 | struct key *key; /* key to use for secure mounting */ | |
60 | }; | |
61 | ||
8e8d7f13 | 62 | enum afs_call_state { |
98bf40cd DH |
63 | AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ |
64 | AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ | |
65 | AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ | |
66 | AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ | |
67 | AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ | |
68 | AFS_CALL_SV_REPLYING, /* Server: Replying */ | |
69 | AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ | |
70 | AFS_CALL_COMPLETE, /* Completed or failed */ | |
8e8d7f13 | 71 | }; |
f044c884 | 72 | |
8b2a464c DH |
73 | /* |
74 | * List of server addresses. | |
75 | */ | |
76 | struct afs_addr_list { | |
ddd2b85f | 77 | struct rcu_head rcu; |
8b2a464c | 78 | refcount_t usage; |
d2ddc776 | 79 | u32 version; /* Version */ |
68eb64c3 DH |
80 | unsigned char max_addrs; |
81 | unsigned char nr_addrs; | |
3bf0fb6f | 82 | unsigned char preferred; /* Preferred address */ |
68eb64c3 | 83 | unsigned char nr_ipv4; /* Number of IPv4 addresses */ |
0a5143f2 DH |
84 | enum dns_record_source source:8; |
85 | enum dns_lookup_status status:8; | |
3bf0fb6f DH |
86 | unsigned long failed; /* Mask of addrs that failed locally/ICMP */ |
87 | unsigned long responded; /* Mask of addrs that responded */ | |
8b2a464c | 88 | struct sockaddr_rxrpc addrs[]; |
68eb64c3 | 89 | #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8)) |
8b2a464c DH |
90 | }; |
91 | ||
08e0e7c8 DH |
92 | /* |
93 | * a record of an in-progress RxRPC call | |
94 | */ | |
95 | struct afs_call { | |
96 | const struct afs_call_type *type; /* type of call */ | |
3bf0fb6f | 97 | struct afs_addr_list *alist; /* Address is alist[addr_ix] */ |
08e0e7c8 | 98 | wait_queue_head_t waitq; /* processes awaiting completion */ |
341f741f | 99 | struct work_struct async_work; /* async I/O processor */ |
08e0e7c8 | 100 | struct work_struct work; /* actual work processor */ |
08e0e7c8 DH |
101 | struct rxrpc_call *rxcall; /* RxRPC call handle */ |
102 | struct key *key; /* security for this call */ | |
f044c884 | 103 | struct afs_net *net; /* The network namespace */ |
a6853b9c DH |
104 | struct afs_server *server; /* The fileserver record if fs op (pins ref) */ |
105 | struct afs_vlserver *vlserver; /* The vlserver record if vl op */ | |
08e0e7c8 | 106 | void *request; /* request data (first part) */ |
fc276122 DH |
107 | struct iov_iter def_iter; /* Default buffer/data iterator */ |
108 | struct iov_iter *iter; /* Iterator currently in use */ | |
109 | union { /* Convenience for ->def_iter */ | |
12bdcf33 DH |
110 | struct kvec kvec[1]; |
111 | struct bio_vec bvec[1]; | |
112 | }; | |
08e0e7c8 | 113 | void *buffer; /* reply receive buffer */ |
ffba718e DH |
114 | union { |
115 | long ret0; /* Value to reply with instead of 0 */ | |
116 | struct afs_addr_list *ret_alist; | |
117 | struct afs_vldb_entry *ret_vldb; | |
c3e9f888 | 118 | char *ret_str; |
ffba718e | 119 | }; |
e49c7b2f | 120 | struct afs_operation *op; |
ffba718e | 121 | unsigned int server_index; |
341f741f | 122 | atomic_t usage; |
8e8d7f13 | 123 | enum afs_call_state state; |
98bf40cd | 124 | spinlock_t state_lock; |
08e0e7c8 | 125 | int error; /* error code */ |
d001648e | 126 | u32 abort_code; /* Remote abort ID or 0 */ |
94f699c9 | 127 | unsigned int max_lifespan; /* Maximum lifespan to set if not 0 */ |
08e0e7c8 DH |
128 | unsigned request_size; /* size of request data */ |
129 | unsigned reply_max; /* maximum size of reply */ | |
e49c7b2f | 130 | unsigned count2; /* count used in unmarshalling */ |
08e0e7c8 | 131 | unsigned char unmarshall; /* unmarshalling phase */ |
3bf0fb6f | 132 | unsigned char addr_ix; /* Address in ->alist */ |
dde9f095 | 133 | bool drop_ref; /* T if need to drop ref for incoming call */ |
31143d5d | 134 | bool send_pages; /* T if data from mapping should be sent */ |
d001648e | 135 | bool need_attention; /* T if RxRPC poked us */ |
56ff9c83 | 136 | bool async; /* T if asynchronous */ |
a68f4a27 | 137 | bool upgrade; /* T to request service upgrade */ |
4571577f | 138 | bool have_reply_time; /* T if have got reply_time */ |
20b8391f | 139 | bool intr; /* T if interruptible */ |
38355eec | 140 | bool unmarshalling_error; /* T if an unmarshalling error occurred */ |
bf99a53c | 141 | u16 service_id; /* Actual service ID (after upgrade) */ |
a25e21f0 | 142 | unsigned int debug_id; /* Trace ID */ |
50a2c953 | 143 | u32 operation_ID; /* operation ID for an incoming call */ |
08e0e7c8 | 144 | u32 count; /* count for use in unmarshalling */ |
12bdcf33 DH |
145 | union { /* place to extract temporary data */ |
146 | struct { | |
147 | __be32 tmp_u; | |
148 | __be32 tmp; | |
149 | } __attribute__((packed)); | |
150 | __be64 tmp64; | |
151 | }; | |
12d8e95a | 152 | ktime_t reply_time; /* Time of first reply packet */ |
08e0e7c8 DH |
153 | }; |
154 | ||
155 | struct afs_call_type { | |
00d3b7a4 | 156 | const char *name; |
025db80c | 157 | unsigned int op; /* Really enum afs_fs_operation */ |
00d3b7a4 | 158 | |
08e0e7c8 DH |
159 | /* deliver request or reply data to an call |
160 | * - returning an error will cause the call to be aborted | |
161 | */ | |
d001648e | 162 | int (*deliver)(struct afs_call *call); |
08e0e7c8 | 163 | |
08e0e7c8 DH |
164 | /* clean up a call */ |
165 | void (*destructor)(struct afs_call *call); | |
341f741f DH |
166 | |
167 | /* Work function */ | |
168 | void (*work)(struct work_struct *work); | |
3bf0fb6f DH |
169 | |
170 | /* Call done function (gets called immediately on success or failure) */ | |
171 | void (*done)(struct afs_call *call); | |
08e0e7c8 DH |
172 | }; |
173 | ||
4343d008 DH |
174 | /* |
175 | * Key available for writeback on a file. | |
176 | */ | |
177 | struct afs_wb_key { | |
178 | refcount_t usage; | |
179 | struct key *key; | |
180 | struct list_head vnode_link; /* Link in vnode->wb_keys */ | |
181 | }; | |
182 | ||
215804a9 DH |
183 | /* |
184 | * AFS open file information record. Pointed to by file->private_data. | |
185 | */ | |
186 | struct afs_file { | |
187 | struct key *key; /* The key this file was opened with */ | |
4343d008 | 188 | struct afs_wb_key *wb; /* Writeback key record for this file */ |
215804a9 DH |
189 | }; |
190 | ||
191 | static inline struct key *afs_file_key(struct file *file) | |
192 | { | |
193 | struct afs_file *af = file->private_data; | |
194 | ||
195 | return af->key; | |
196 | } | |
197 | ||
196ee9cd DH |
198 | /* |
199 | * Record of an outstanding read operation on a vnode. | |
200 | */ | |
201 | struct afs_read { | |
202 | loff_t pos; /* Where to start reading */ | |
e8e581a8 | 203 | loff_t len; /* How much we're asking for */ |
196ee9cd | 204 | loff_t actual_len; /* How much we're actually getting */ |
6a0e3999 | 205 | loff_t remain; /* Amount remaining */ |
f3ddee8d DH |
206 | loff_t file_size; /* File size returned by server */ |
207 | afs_dataversion_t data_version; /* Version number returned by server */ | |
208 | refcount_t usage; | |
196ee9cd | 209 | unsigned int index; /* Which page we're reading into */ |
196ee9cd | 210 | unsigned int nr_pages; |
12bdcf33 | 211 | unsigned int offset; /* offset into current page */ |
a58823ac DH |
212 | struct afs_vnode *vnode; |
213 | void (*page_done)(struct afs_read *); | |
f3ddee8d DH |
214 | struct page **pages; |
215 | struct page *array[]; | |
196ee9cd DH |
216 | }; |
217 | ||
08e0e7c8 DH |
218 | /* |
219 | * AFS superblock private data | |
220 | * - there's one superblock per volume | |
221 | */ | |
222 | struct afs_super_info { | |
5b86d4ff | 223 | struct net *net_ns; /* Network namespace */ |
49566f6f | 224 | struct afs_cell *cell; /* The cell in which the volume resides */ |
08e0e7c8 | 225 | struct afs_volume *volume; /* volume record */ |
6c6c1d63 | 226 | enum afs_flock_mode flock_mode:8; /* File locking emulation mode */ |
4d673da1 | 227 | bool dyn_root; /* True if dynamic root */ |
08e0e7c8 | 228 | }; |
1da177e4 | 229 | |
08e0e7c8 DH |
230 | static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
231 | { | |
232 | return sb->s_fs_info; | |
1da177e4 LT |
233 | } |
234 | ||
08e0e7c8 DH |
235 | extern struct file_system_type afs_fs_type; |
236 | ||
6f8880d8 DH |
237 | /* |
238 | * Set of substitutes for @sys. | |
239 | */ | |
240 | struct afs_sysnames { | |
241 | #define AFS_NR_SYSNAME 16 | |
242 | char *subs[AFS_NR_SYSNAME]; | |
243 | refcount_t usage; | |
244 | unsigned short nr; | |
6f8880d8 DH |
245 | char blank[1]; |
246 | }; | |
247 | ||
f044c884 DH |
248 | /* |
249 | * AFS network namespace record. | |
250 | */ | |
251 | struct afs_net { | |
5b86d4ff | 252 | struct net *net; /* Backpointer to the owning net namespace */ |
f044c884 DH |
253 | struct afs_uuid uuid; |
254 | bool live; /* F if this namespace is being removed */ | |
255 | ||
256 | /* AF_RXRPC I/O stuff */ | |
257 | struct socket *socket; | |
258 | struct afs_call *spare_incoming_call; | |
259 | struct work_struct charge_preallocation_work; | |
260 | struct mutex socket_mutex; | |
261 | atomic_t nr_outstanding_calls; | |
262 | atomic_t nr_superblocks; | |
263 | ||
264 | /* Cell database */ | |
989782dc | 265 | struct rb_root cells; |
92e3cc91 | 266 | struct afs_cell *ws_cell; |
989782dc DH |
267 | struct work_struct cells_manager; |
268 | struct timer_list cells_timer; | |
269 | atomic_t cells_outstanding; | |
92e3cc91 | 270 | struct rw_semaphore cells_lock; |
8a070a96 | 271 | struct mutex cells_alias_lock; |
f044c884 | 272 | |
0da0b7fd | 273 | struct mutex proc_cells_lock; |
6b3944e4 | 274 | struct hlist_head proc_cells; |
f044c884 | 275 | |
d2ddc776 DH |
276 | /* Known servers. Theoretically each fileserver can only be in one |
277 | * cell, but in practice, people create aliases and subsets and there's | |
278 | * no easy way to distinguish them. | |
279 | */ | |
f6cbb368 | 280 | seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */ |
d2ddc776 | 281 | struct rb_root fs_servers; /* afs_server (by server UUID or address) */ |
f6cbb368 DH |
282 | struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */ |
283 | struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */ | |
d2ddc776 | 284 | struct hlist_head fs_proc; /* procfs servers list */ |
f044c884 | 285 | |
d2ddc776 DH |
286 | struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ |
287 | struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */ | |
288 | seqlock_t fs_addr_lock; /* For fs_addresses[46] */ | |
f044c884 | 289 | |
d2ddc776 DH |
290 | struct work_struct fs_manager; |
291 | struct timer_list fs_timer; | |
f6cbb368 DH |
292 | |
293 | struct work_struct fs_prober; | |
294 | struct timer_list fs_probe_timer; | |
59fa1c4a | 295 | atomic_t servers_outstanding; |
f044c884 | 296 | |
d2ddc776 DH |
297 | /* File locking renewal management */ |
298 | struct mutex lock_manager_mutex; | |
299 | ||
f044c884 | 300 | /* Misc */ |
0da0b7fd | 301 | struct super_block *dynroot_sb; /* Dynamic root mount superblock */ |
d55b4da4 | 302 | struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ |
6f8880d8 DH |
303 | struct afs_sysnames *sysnames; |
304 | rwlock_t sysnames_lock; | |
d55b4da4 DH |
305 | |
306 | /* Statistics counters */ | |
307 | atomic_t n_lookup; /* Number of lookups done */ | |
308 | atomic_t n_reval; /* Number of dentries needing revalidation */ | |
309 | atomic_t n_inval; /* Number of invalidations by the server */ | |
f3ddee8d | 310 | atomic_t n_relpg; /* Number of invalidations by releasepage */ |
d55b4da4 | 311 | atomic_t n_read_dir; /* Number of directory pages read */ |
63a4681f DH |
312 | atomic_t n_dir_cr; /* Number of directory entry creation edits */ |
313 | atomic_t n_dir_rm; /* Number of directory entry removal edits */ | |
76a5cb6f DH |
314 | atomic_t n_stores; /* Number of store ops */ |
315 | atomic_long_t n_store_bytes; /* Number of bytes stored */ | |
316 | atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ | |
317 | atomic_t n_fetches; /* Number of data fetch ops */ | |
f044c884 DH |
318 | }; |
319 | ||
6f8880d8 | 320 | extern const char afs_init_sysname[]; |
f044c884 | 321 | |
989782dc DH |
322 | enum afs_cell_state { |
323 | AFS_CELL_UNSET, | |
324 | AFS_CELL_ACTIVATING, | |
325 | AFS_CELL_ACTIVE, | |
326 | AFS_CELL_DEACTIVATING, | |
327 | AFS_CELL_INACTIVE, | |
328 | AFS_CELL_FAILED, | |
1d0e850a | 329 | AFS_CELL_REMOVED, |
989782dc DH |
330 | }; |
331 | ||
08e0e7c8 | 332 | /* |
d2ddc776 DH |
333 | * AFS cell record. |
334 | * | |
335 | * This is a tricky concept to get right as it is possible to create aliases | |
336 | * simply by pointing AFSDB/SRV records for two names at the same set of VL | |
337 | * servers; it is also possible to do things like setting up two sets of VL | |
338 | * servers, one of which provides a superset of the volumes provided by the | |
339 | * other (for internal/external division, for example). | |
340 | * | |
341 | * Cells only exist in the sense that (a) a cell's name maps to a set of VL | |
342 | * servers and (b) a cell's name is used by the client to select the key to use | |
343 | * for authentication and encryption. The cell name is not typically used in | |
344 | * the protocol. | |
345 | * | |
8a070a96 DH |
346 | * Two cells are determined to be aliases if they have an explicit alias (YFS |
347 | * only), share any VL servers in common or have at least one volume in common. | |
348 | * "In common" means that the address list of the VL servers or the fileservers | |
349 | * share at least one endpoint. | |
08e0e7c8 DH |
350 | */ |
351 | struct afs_cell { | |
989782dc DH |
352 | union { |
353 | struct rcu_head rcu; | |
354 | struct rb_node net_node; /* Node in net->cells */ | |
355 | }; | |
356 | struct afs_net *net; | |
8a070a96 DH |
357 | struct afs_cell *alias_of; /* The cell this is an alias of */ |
358 | struct afs_volume *root_volume; /* The root.cell volume if there is one */ | |
00d3b7a4 | 359 | struct key *anonymous_key; /* anonymous user key for this cell */ |
989782dc | 360 | struct work_struct manager; /* Manager for init/deinit/dns */ |
6b3944e4 | 361 | struct hlist_node proc_link; /* /proc cell list link */ |
9b3f26c9 DH |
362 | #ifdef CONFIG_AFS_FSCACHE |
363 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 364 | #endif |
989782dc DH |
365 | time64_t dns_expiry; /* Time AFSDB/SRV record expires */ |
366 | time64_t last_inactive; /* Time of last drop of usage count */ | |
88c853c3 DH |
367 | atomic_t ref; /* Struct refcount */ |
368 | atomic_t active; /* Active usage counter */ | |
989782dc | 369 | unsigned long flags; |
d5c32c89 DH |
370 | #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */ |
371 | #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */ | |
8a070a96 | 372 | #define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */ |
989782dc DH |
373 | enum afs_cell_state state; |
374 | short error; | |
d5c32c89 DH |
375 | enum dns_record_source dns_source:8; /* Latest source of data from lookup */ |
376 | enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */ | |
377 | unsigned int dns_lookup_count; /* Counter of DNS lookups */ | |
dca54a7b | 378 | unsigned int debug_id; |
989782dc | 379 | |
20325960 DH |
380 | /* The volumes belonging to this cell */ |
381 | struct rb_root volumes; /* Tree of volumes on this server */ | |
382 | struct hlist_head proc_volumes; /* procfs volume list */ | |
383 | seqlock_t volume_lock; /* For volumes */ | |
384 | ||
d2ddc776 | 385 | /* Active fileserver interaction state. */ |
20325960 DH |
386 | struct rb_root fs_servers; /* afs_server (by server UUID) */ |
387 | seqlock_t fs_lock; /* For fs_servers */ | |
989782dc | 388 | |
d2ddc776 | 389 | /* VL server list. */ |
0a5143f2 DH |
390 | rwlock_t vl_servers_lock; /* Lock on vl_servers */ |
391 | struct afs_vlserver_list __rcu *vl_servers; | |
392 | ||
989782dc | 393 | u8 name_len; /* Length of name */ |
719fdd32 | 394 | char *name; /* Cell name, case-flattened and NUL-padded */ |
08e0e7c8 DH |
395 | }; |
396 | ||
0a5143f2 DH |
397 | /* |
398 | * Volume Location server record. | |
399 | */ | |
400 | struct afs_vlserver { | |
401 | struct rcu_head rcu; | |
402 | struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */ | |
403 | unsigned long flags; | |
404 | #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ | |
405 | #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ | |
3bf0fb6f | 406 | #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ |
b95b3094 | 407 | #define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */ |
0a5143f2 DH |
408 | rwlock_t lock; /* Lock on addresses */ |
409 | atomic_t usage; | |
b95b3094 | 410 | unsigned int rtt; /* Server's current RTT in uS */ |
3bf0fb6f DH |
411 | |
412 | /* Probe state */ | |
413 | wait_queue_head_t probe_wq; | |
414 | atomic_t probe_outstanding; | |
415 | spinlock_t probe_lock; | |
416 | struct { | |
b95b3094 | 417 | unsigned int rtt; /* RTT in uS */ |
3bf0fb6f DH |
418 | u32 abort_code; |
419 | short error; | |
fb72cd3d DH |
420 | unsigned short flags; |
421 | #define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */ | |
422 | #define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */ | |
423 | #define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */ | |
424 | #define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */ | |
3bf0fb6f DH |
425 | } probe; |
426 | ||
0a5143f2 | 427 | u16 port; |
3bf0fb6f | 428 | u16 name_len; /* Length of name */ |
0a5143f2 DH |
429 | char name[]; /* Server name, case-flattened */ |
430 | }; | |
431 | ||
432 | /* | |
433 | * Weighted list of Volume Location servers. | |
434 | */ | |
435 | struct afs_vlserver_entry { | |
436 | u16 priority; /* Preference (as SRV) */ | |
437 | u16 weight; /* Weight (as SRV) */ | |
438 | enum dns_record_source source:8; | |
439 | enum dns_lookup_status status:8; | |
440 | struct afs_vlserver *server; | |
441 | }; | |
442 | ||
443 | struct afs_vlserver_list { | |
444 | struct rcu_head rcu; | |
445 | atomic_t usage; | |
446 | u8 nr_servers; | |
447 | u8 index; /* Server currently in use */ | |
3bf0fb6f | 448 | u8 preferred; /* Preferred server */ |
0a5143f2 DH |
449 | enum dns_record_source source:8; |
450 | enum dns_lookup_status status:8; | |
451 | rwlock_t lock; | |
452 | struct afs_vlserver_entry servers[]; | |
453 | }; | |
454 | ||
08e0e7c8 | 455 | /* |
d2ddc776 DH |
456 | * Cached VLDB entry. |
457 | * | |
458 | * This is pointed to by cell->vldb_entries, indexed by name. | |
08e0e7c8 | 459 | */ |
d2ddc776 DH |
460 | struct afs_vldb_entry { |
461 | afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ | |
00d3b7a4 | 462 | |
d2ddc776 DH |
463 | unsigned long flags; |
464 | #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ | |
465 | #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ | |
466 | #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ | |
467 | #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ | |
468 | #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ | |
469 | ||
470 | uuid_t fs_server[AFS_NMAXNSERVERS]; | |
81006805 | 471 | u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */ |
d2ddc776 | 472 | u8 fs_mask[AFS_NMAXNSERVERS]; |
08e0e7c8 DH |
473 | #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ |
474 | #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ | |
475 | #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ | |
d2ddc776 DH |
476 | short error; |
477 | u8 nr_servers; /* Number of server records */ | |
478 | u8 name_len; | |
479 | u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ | |
08e0e7c8 DH |
480 | }; |
481 | ||
482 | /* | |
d2ddc776 | 483 | * Record of fileserver with which we're actively communicating. |
08e0e7c8 DH |
484 | */ |
485 | struct afs_server { | |
d2ddc776 DH |
486 | struct rcu_head rcu; |
487 | union { | |
488 | uuid_t uuid; /* Server ID */ | |
489 | struct afs_uuid _uuid; | |
490 | }; | |
491 | ||
492 | struct afs_addr_list __rcu *addresses; | |
20325960 | 493 | struct afs_cell *cell; /* Cell to which belongs (pins ref) */ |
3c4c4075 DH |
494 | struct rb_node uuid_rb; /* Link in net->fs_servers */ |
495 | struct afs_server __rcu *uuid_next; /* Next server with same UUID */ | |
496 | struct afs_server *uuid_prev; /* Previous server with same UUID */ | |
f6cbb368 | 497 | struct list_head probe_link; /* Link in net->fs_probe_list */ |
d2ddc776 DH |
498 | struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ |
499 | struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ | |
500 | struct hlist_node proc_link; /* Link in net->fs_proc */ | |
501 | struct afs_server *gc_next; /* Next server in manager's list */ | |
977e5f8e | 502 | time64_t unuse_time; /* Time at which last unused */ |
c435ee34 | 503 | unsigned long flags; |
f3c130e6 | 504 | #define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */ |
32275d3f DH |
505 | #define AFS_SERVER_FL_UPDATING 1 |
506 | #define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */ | |
507 | #define AFS_SERVER_FL_NOT_READY 4 /* The record is not ready for use */ | |
508 | #define AFS_SERVER_FL_NOT_FOUND 5 /* VL server says no such server */ | |
509 | #define AFS_SERVER_FL_VL_FAIL 6 /* Failed to access VL server */ | |
f2686b09 | 510 | #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ |
32275d3f DH |
511 | #define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */ |
512 | #define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */ | |
513 | #define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */ | |
977e5f8e DH |
514 | atomic_t ref; /* Object refcount */ |
515 | atomic_t active; /* Active user count */ | |
d2ddc776 | 516 | u32 addr_version; /* Address list version */ |
f3c130e6 | 517 | unsigned int rtt; /* Server's current RTT in uS */ |
45218193 | 518 | unsigned int debug_id; /* Debugging ID for traces */ |
08e0e7c8 DH |
519 | |
520 | /* file service access */ | |
d2ddc776 | 521 | rwlock_t fs_lock; /* access lock */ |
08e0e7c8 DH |
522 | |
523 | /* callback promise management */ | |
c435ee34 | 524 | unsigned cb_s_break; /* Break-everything counter. */ |
3bf0fb6f DH |
525 | |
526 | /* Probe state */ | |
f6cbb368 | 527 | unsigned long probed_at; /* Time last probe was dispatched (jiffies) */ |
3bf0fb6f DH |
528 | wait_queue_head_t probe_wq; |
529 | atomic_t probe_outstanding; | |
530 | spinlock_t probe_lock; | |
531 | struct { | |
f3c130e6 | 532 | unsigned int rtt; /* RTT in uS */ |
3bf0fb6f | 533 | u32 abort_code; |
3bf0fb6f | 534 | short error; |
3bf0fb6f DH |
535 | bool responded:1; |
536 | bool is_yfs:1; | |
537 | bool not_yfs:1; | |
538 | bool local_failure:1; | |
3bf0fb6f | 539 | } probe; |
c435ee34 DH |
540 | }; |
541 | ||
08e0e7c8 | 542 | /* |
194d28cf | 543 | * Replaceable volume server list. |
d2ddc776 DH |
544 | */ |
545 | struct afs_server_entry { | |
546 | struct afs_server *server; | |
d2ddc776 DH |
547 | }; |
548 | ||
549 | struct afs_server_list { | |
194d28cf | 550 | afs_volid_t vids[AFS_MAXTYPES]; /* Volume IDs */ |
d2ddc776 | 551 | refcount_t usage; |
3bf0fb6f DH |
552 | unsigned char nr_servers; |
553 | unsigned char preferred; /* Preferred server */ | |
d2ddc776 DH |
554 | unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ |
555 | unsigned int seq; /* Set to ->servers_seq when installed */ | |
d4a96bec | 556 | rwlock_t lock; |
d2ddc776 DH |
557 | struct afs_server_entry servers[]; |
558 | }; | |
559 | ||
560 | /* | |
561 | * Live AFS volume management. | |
08e0e7c8 DH |
562 | */ |
563 | struct afs_volume { | |
20325960 DH |
564 | union { |
565 | struct rcu_head rcu; | |
566 | afs_volid_t vid; /* volume ID */ | |
567 | }; | |
08e0e7c8 | 568 | atomic_t usage; |
d2ddc776 DH |
569 | time64_t update_at; /* Time at which to next update */ |
570 | struct afs_cell *cell; /* Cell to which belongs (pins ref) */ | |
20325960 DH |
571 | struct rb_node cell_node; /* Link in cell->volumes */ |
572 | struct hlist_node proc_link; /* Link in cell->proc_volumes */ | |
573 | struct super_block __rcu *sb; /* Superblock on which inodes reside */ | |
d2ddc776 DH |
574 | unsigned long flags; |
575 | #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ | |
576 | #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ | |
577 | #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ | |
578 | #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ | |
579 | #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ | |
580 | #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ | |
20325960 | 581 | #define AFS_VOLUME_MAYBE_NO_IBULK 6 /* - T if some servers don't have InlineBulkStatus */ |
9b3f26c9 DH |
582 | #ifdef CONFIG_AFS_FSCACHE |
583 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 584 | #endif |
8a070a96 | 585 | struct afs_server_list __rcu *servers; /* List of servers on which volume resides */ |
d2ddc776 DH |
586 | rwlock_t servers_lock; /* Lock for ->servers */ |
587 | unsigned int servers_seq; /* Incremented each time ->servers changes */ | |
588 | ||
68251f0a | 589 | unsigned cb_v_break; /* Break-everything counter. */ |
90fa9b64 | 590 | rwlock_t cb_v_break_lock; |
68251f0a | 591 | |
08e0e7c8 DH |
592 | afs_voltype_t type; /* type of volume */ |
593 | char type_force; /* force volume type (suppress R/O -> R/W) */ | |
d2ddc776 DH |
594 | u8 name_len; |
595 | u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ | |
08e0e7c8 DH |
596 | }; |
597 | ||
0fafdc9f DH |
598 | enum afs_lock_state { |
599 | AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ | |
600 | AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ | |
601 | AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ | |
602 | AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ | |
603 | AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ | |
604 | AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ | |
605 | AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ | |
cdfb26b4 | 606 | AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */ |
0fafdc9f DH |
607 | }; |
608 | ||
08e0e7c8 | 609 | /* |
f8de483e DH |
610 | * AFS inode private data. |
611 | * | |
612 | * Note that afs_alloc_inode() *must* reset anything that could incorrectly | |
613 | * leak from one inode to another. | |
08e0e7c8 DH |
614 | */ |
615 | struct afs_vnode { | |
616 | struct inode vfs_inode; /* the VFS's inode record */ | |
617 | ||
618 | struct afs_volume *volume; /* volume on which vnode resides */ | |
08e0e7c8 DH |
619 | struct afs_fid fid; /* the file identifier for this inode */ |
620 | struct afs_file_status status; /* AFS status info for this file */ | |
a4ff7401 | 621 | afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ |
9b3f26c9 DH |
622 | #ifdef CONFIG_AFS_FSCACHE |
623 | struct fscache_cookie *cache; /* caching cookie */ | |
08e0e7c8 | 624 | #endif |
fe342cf7 | 625 | struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ |
d2ddc776 | 626 | struct mutex io_lock; /* Lock for serialising I/O on this mutex */ |
b61f7dcf | 627 | struct rw_semaphore validate_lock; /* lock for validating this vnode */ |
79ddbfa5 DH |
628 | struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ |
629 | struct key *silly_key; /* Silly rename key */ | |
4343d008 | 630 | spinlock_t wb_lock; /* lock for wb_keys */ |
08e0e7c8 DH |
631 | spinlock_t lock; /* waitqueue/flags lock */ |
632 | unsigned long flags; | |
c435ee34 | 633 | #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ |
260a9803 | 634 | #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
f3ddee8d | 635 | #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ |
08e0e7c8 DH |
636 | #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ |
637 | #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ | |
638 | #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ | |
0fafdc9f DH |
639 | #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ |
640 | #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ | |
5a813276 | 641 | #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ |
b6489a49 | 642 | #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */ |
08e0e7c8 | 643 | |
4343d008 | 644 | struct list_head wb_keys; /* List of keys available for writeback */ |
e8d6c554 DH |
645 | struct list_head pending_locks; /* locks waiting to be granted */ |
646 | struct list_head granted_locks; /* locks granted on this file */ | |
647 | struct delayed_work lock_work; /* work to be done in locking */ | |
0fafdc9f | 648 | struct key *lock_key; /* Key to be used in lock ops */ |
a690f60a | 649 | ktime_t locked_at; /* Time at which lock obtained */ |
0fafdc9f DH |
650 | enum afs_lock_state lock_state : 8; |
651 | afs_lock_type_t lock_type : 8; | |
31143d5d | 652 | |
08e0e7c8 | 653 | /* outstanding callback notification on this file */ |
20325960 | 654 | void *cb_server; /* Server with callback/filelock */ |
c435ee34 | 655 | unsigned int cb_s_break; /* Mass break counter on ->server */ |
68251f0a | 656 | unsigned int cb_v_break; /* Mass break counter on ->volume */ |
c435ee34 | 657 | unsigned int cb_break; /* Break counter on vnode */ |
20325960 | 658 | seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ |
c435ee34 DH |
659 | |
660 | time64_t cb_expires_at; /* time at which callback expires */ | |
08e0e7c8 DH |
661 | }; |
662 | ||
12bdcf33 DH |
663 | static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) |
664 | { | |
665 | #ifdef CONFIG_AFS_FSCACHE | |
666 | return vnode->cache; | |
667 | #else | |
668 | return NULL; | |
669 | #endif | |
670 | } | |
671 | ||
00d3b7a4 DH |
672 | /* |
673 | * cached security record for one user's attempt to access a vnode | |
674 | */ | |
675 | struct afs_permit { | |
676 | struct key *key; /* RxRPC ticket holding a security context */ | |
be080a6f | 677 | afs_access_t access; /* CallerAccess value for this key */ |
00d3b7a4 DH |
678 | }; |
679 | ||
680 | /* | |
be080a6f DH |
681 | * Immutable cache of CallerAccess records from attempts to access vnodes. |
682 | * These may be shared between multiple vnodes. | |
00d3b7a4 DH |
683 | */ |
684 | struct afs_permits { | |
be080a6f DH |
685 | struct rcu_head rcu; |
686 | struct hlist_node hash_node; /* Link in hash */ | |
687 | unsigned long h; /* Hash value for this permit list */ | |
688 | refcount_t usage; | |
689 | unsigned short nr_permits; /* Number of records */ | |
690 | bool invalidated; /* Invalidated due to key change */ | |
691 | struct afs_permit permits[]; /* List of permits sorted by key pointer */ | |
00d3b7a4 DH |
692 | }; |
693 | ||
4584ae96 DH |
694 | /* |
695 | * Error prioritisation and accumulation. | |
696 | */ | |
697 | struct afs_error { | |
698 | short error; /* Accumulated error */ | |
699 | bool responded; /* T if server responded */ | |
700 | }; | |
701 | ||
8b2a464c DH |
702 | /* |
703 | * Cursor for iterating over a server's address list. | |
704 | */ | |
705 | struct afs_addr_cursor { | |
706 | struct afs_addr_list *alist; /* Current address list (pins ref) */ | |
3bf0fb6f DH |
707 | unsigned long tried; /* Tried addresses */ |
708 | signed char index; /* Current address */ | |
8b2a464c | 709 | bool responded; /* T if the current address responded */ |
744bcd71 | 710 | unsigned short nr_iterations; /* Number of address iterations */ |
3bf0fb6f DH |
711 | short error; |
712 | u32 abort_code; | |
8b2a464c DH |
713 | }; |
714 | ||
0a5143f2 DH |
715 | /* |
716 | * Cursor for iterating over a set of volume location servers. | |
717 | */ | |
718 | struct afs_vl_cursor { | |
719 | struct afs_addr_cursor ac; | |
720 | struct afs_cell *cell; /* The cell we're querying */ | |
721 | struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ | |
3bf0fb6f | 722 | struct afs_vlserver *server; /* Server on which this resides */ |
0a5143f2 | 723 | struct key *key; /* Key for the server */ |
3bf0fb6f DH |
724 | unsigned long untried; /* Bitmask of untried servers */ |
725 | short index; /* Current server */ | |
0a5143f2 DH |
726 | short error; |
727 | unsigned short flags; | |
728 | #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ | |
729 | #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ | |
730 | #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ | |
744bcd71 | 731 | unsigned short nr_iterations; /* Number of server iterations */ |
0a5143f2 DH |
732 | }; |
733 | ||
8b2a464c | 734 | /* |
e49c7b2f DH |
735 | * Fileserver operation methods. |
736 | */ | |
737 | struct afs_operation_ops { | |
738 | void (*issue_afs_rpc)(struct afs_operation *op); | |
739 | void (*issue_yfs_rpc)(struct afs_operation *op); | |
740 | void (*success)(struct afs_operation *op); | |
741 | void (*aborted)(struct afs_operation *op); | |
742 | void (*edit_dir)(struct afs_operation *op); | |
743 | void (*put)(struct afs_operation *op); | |
744 | }; | |
745 | ||
746 | struct afs_vnode_param { | |
747 | struct afs_vnode *vnode; | |
748 | struct afs_fid fid; /* Fid to access */ | |
749 | struct afs_status_cb scb; /* Returned status and callback promise */ | |
750 | afs_dataversion_t dv_before; /* Data version before the call */ | |
751 | unsigned int cb_break_before; /* cb_break + cb_s_break before the call */ | |
752 | u8 dv_delta; /* Expected change in data version */ | |
793fe82e DH |
753 | bool put_vnode:1; /* T if we have a ref on the vnode */ |
754 | bool need_io_lock:1; /* T if we need the I/O lock on this */ | |
755 | bool update_ctime:1; /* Need to update the ctime */ | |
756 | bool set_size:1; /* Must update i_size */ | |
b6489a49 | 757 | bool op_unlinked:1; /* True if file was unlinked by op */ |
e49c7b2f DH |
758 | }; |
759 | ||
760 | /* | |
761 | * Fileserver operation wrapper, handling server and address rotation | |
762 | * asynchronously. May make simultaneous calls to multiple servers. | |
8b2a464c | 763 | */ |
a310082f | 764 | struct afs_operation { |
e49c7b2f DH |
765 | struct afs_net *net; /* Network namespace */ |
766 | struct key *key; /* Key for the cell */ | |
a58823ac | 767 | const struct afs_call_type *type; /* Type of call done */ |
e49c7b2f DH |
768 | const struct afs_operation_ops *ops; |
769 | ||
770 | /* Parameters/results for the operation */ | |
771 | struct afs_volume *volume; /* Volume being accessed */ | |
772 | struct afs_vnode_param file[2]; | |
773 | struct afs_vnode_param *more_files; | |
774 | struct afs_volsync volsync; | |
775 | struct dentry *dentry; /* Dentry to be altered */ | |
776 | struct dentry *dentry_2; /* Second dentry to be altered */ | |
777 | struct timespec64 mtime; /* Modification time to record */ | |
da8d0755 | 778 | struct timespec64 ctime; /* Change time to set */ |
e49c7b2f DH |
779 | short nr_files; /* Number of entries in file[], more_files */ |
780 | short error; | |
e49c7b2f DH |
781 | unsigned int debug_id; |
782 | ||
783 | unsigned int cb_v_break; /* Volume break counter before op */ | |
784 | unsigned int cb_s_break; /* Server break counter before op */ | |
785 | ||
786 | union { | |
787 | struct { | |
788 | int which; /* Which ->file[] to fetch for */ | |
789 | } fetch_status; | |
790 | struct { | |
791 | int reason; /* enum afs_edit_dir_reason */ | |
792 | mode_t mode; | |
793 | const char *symlink; | |
794 | } create; | |
795 | struct { | |
796 | bool need_rehash; | |
797 | } unlink; | |
798 | struct { | |
799 | struct dentry *rehash; | |
800 | struct dentry *tmp; | |
801 | bool new_negative; | |
802 | } rename; | |
803 | struct { | |
804 | struct afs_read *req; | |
805 | } fetch; | |
806 | struct { | |
e49c7b2f DH |
807 | afs_lock_type_t type; |
808 | } lock; | |
809 | struct { | |
810 | struct address_space *mapping; /* Pages being written from */ | |
811 | pgoff_t first; /* first page in mapping to deal with */ | |
812 | pgoff_t last; /* last page in mapping to deal with */ | |
813 | unsigned first_offset; /* offset into mapping[first] */ | |
814 | unsigned last_to; /* amount of mapping[last] */ | |
815 | } store; | |
816 | struct { | |
817 | struct iattr *attr; | |
ec0fa0b6 | 818 | loff_t old_i_size; |
e49c7b2f DH |
819 | } setattr; |
820 | struct afs_acl *acl; | |
821 | struct yfs_acl *yacl; | |
822 | struct { | |
823 | struct afs_volume_status vs; | |
824 | struct kstatfs *buf; | |
825 | } volstatus; | |
826 | }; | |
827 | ||
828 | /* Fileserver iteration state */ | |
8b2a464c | 829 | struct afs_addr_cursor ac; |
d2ddc776 | 830 | struct afs_server_list *server_list; /* Current server list (pins ref) */ |
20325960 | 831 | struct afs_server *server; /* Server we're using (ref pinned by server_list) */ |
e49c7b2f | 832 | struct afs_call *call; |
3bf0fb6f | 833 | unsigned long untried; /* Bitmask of untried servers */ |
3bf0fb6f | 834 | short index; /* Current server */ |
e49c7b2f DH |
835 | unsigned short nr_iterations; /* Number of server iterations */ |
836 | ||
837 | unsigned int flags; | |
8409f67b DH |
838 | #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ |
839 | #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ | |
840 | #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ | |
841 | #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ | |
842 | #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ | |
843 | #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ | |
844 | #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ | |
845 | #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ | |
846 | #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ | |
847 | #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ | |
848 | #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ | |
849 | #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ | |
b6489a49 | 850 | #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ |
8b2a464c DH |
851 | }; |
852 | ||
402cb8dd DH |
853 | /* |
854 | * Cache auxiliary data. | |
855 | */ | |
856 | struct afs_vnode_cache_aux { | |
857 | u64 data_version; | |
858 | } __packed; | |
859 | ||
98bf40cd DH |
860 | #include <trace/events/afs.h> |
861 | ||
08e0e7c8 | 862 | /*****************************************************************************/ |
8b2a464c DH |
863 | /* |
864 | * addr_list.c | |
865 | */ | |
866 | static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) | |
867 | { | |
868 | if (alist) | |
869 | refcount_inc(&alist->usage); | |
870 | return alist; | |
871 | } | |
872 | extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, | |
873 | unsigned short, | |
874 | unsigned short); | |
875 | extern void afs_put_addrlist(struct afs_addr_list *); | |
0a5143f2 DH |
876 | extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, |
877 | const char *, size_t, char, | |
878 | unsigned short, unsigned short); | |
879 | extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); | |
8b2a464c DH |
880 | extern bool afs_iterate_addresses(struct afs_addr_cursor *); |
881 | extern int afs_end_cursor(struct afs_addr_cursor *); | |
8b2a464c | 882 | |
bf99a53c DH |
883 | extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); |
884 | extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); | |
d2ddc776 | 885 | |
9b3f26c9 DH |
886 | /* |
887 | * cache.c | |
888 | */ | |
889 | #ifdef CONFIG_AFS_FSCACHE | |
890 | extern struct fscache_netfs afs_cache_netfs; | |
891 | extern struct fscache_cookie_def afs_cell_cache_index_def; | |
9b3f26c9 DH |
892 | extern struct fscache_cookie_def afs_volume_cache_index_def; |
893 | extern struct fscache_cookie_def afs_vnode_cache_index_def; | |
894 | #else | |
895 | #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
9b3f26c9 DH |
896 | #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) |
897 | #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) | |
898 | #endif | |
899 | ||
08e0e7c8 DH |
900 | /* |
901 | * callback.c | |
902 | */ | |
903 | extern void afs_init_callback_state(struct afs_server *); | |
051d2525 DH |
904 | extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); |
905 | extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); | |
906 | extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); | |
c435ee34 | 907 | |
68251f0a DH |
908 | static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) |
909 | { | |
eeba1e9c | 910 | return vnode->cb_break + vnode->cb_v_break; |
68251f0a DH |
911 | } |
912 | ||
18ac6185 | 913 | static inline bool afs_cb_is_broken(unsigned int cb_break, |
20325960 | 914 | const struct afs_vnode *vnode) |
68251f0a | 915 | { |
20325960 | 916 | return cb_break != (vnode->cb_break + vnode->volume->cb_v_break); |
68251f0a DH |
917 | } |
918 | ||
1da177e4 LT |
919 | /* |
920 | * cell.c | |
921 | */ | |
989782dc | 922 | extern int afs_cell_init(struct afs_net *, const char *); |
dca54a7b DH |
923 | extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, |
924 | enum afs_cell_trace); | |
989782dc DH |
925 | extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, |
926 | const char *, bool); | |
dca54a7b DH |
927 | extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); |
928 | extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace); | |
929 | extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); | |
930 | extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); | |
931 | extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); | |
932 | extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); | |
989782dc DH |
933 | extern void afs_manage_cells(struct work_struct *); |
934 | extern void afs_cells_timer(struct timer_list *); | |
f044c884 | 935 | extern void __net_exit afs_cell_purge(struct afs_net *); |
08e0e7c8 DH |
936 | |
937 | /* | |
938 | * cmservice.c | |
939 | */ | |
940 | extern bool afs_cm_incoming_call(struct afs_call *); | |
941 | ||
1da177e4 LT |
942 | /* |
943 | * dir.c | |
944 | */ | |
4d673da1 | 945 | extern const struct file_operations afs_dir_file_operations; |
754661f1 | 946 | extern const struct inode_operations afs_dir_inode_operations; |
f3ddee8d | 947 | extern const struct address_space_operations afs_dir_aops; |
d61dcce2 | 948 | extern const struct dentry_operations afs_fs_dentry_operations; |
4d673da1 | 949 | |
66c7e1d3 | 950 | extern void afs_d_release(struct dentry *); |
728279a5 | 951 | extern void afs_check_for_remote_deletion(struct afs_operation *); |
66c7e1d3 | 952 | |
63a4681f DH |
953 | /* |
954 | * dir_edit.c | |
955 | */ | |
956 | extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, | |
957 | enum afs_edit_dir_reason); | |
958 | extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); | |
959 | ||
79ddbfa5 DH |
960 | /* |
961 | * dir_silly.c | |
962 | */ | |
963 | extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, | |
964 | struct dentry *, struct key *); | |
965 | extern int afs_silly_iput(struct dentry *, struct inode *); | |
966 | ||
66c7e1d3 DH |
967 | /* |
968 | * dynroot.c | |
969 | */ | |
66c7e1d3 DH |
970 | extern const struct inode_operations afs_dynroot_inode_operations; |
971 | extern const struct dentry_operations afs_dynroot_dentry_operations; | |
972 | ||
973 | extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); | |
0da0b7fd DH |
974 | extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); |
975 | extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); | |
976 | extern int afs_dynroot_populate(struct super_block *); | |
977 | extern void afs_dynroot_depopulate(struct super_block *); | |
1da177e4 LT |
978 | |
979 | /* | |
980 | * file.c | |
981 | */ | |
f5e54d6e | 982 | extern const struct address_space_operations afs_fs_aops; |
754661f1 | 983 | extern const struct inode_operations afs_file_inode_operations; |
00d3b7a4 DH |
984 | extern const struct file_operations afs_file_operations; |
985 | ||
4343d008 DH |
986 | extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); |
987 | extern void afs_put_wb_key(struct afs_wb_key *); | |
00d3b7a4 DH |
988 | extern int afs_open(struct inode *, struct file *); |
989 | extern int afs_release(struct inode *, struct file *); | |
d2ddc776 | 990 | extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *); |
f6d335c0 | 991 | extern int afs_page_filler(void *, struct page *); |
196ee9cd | 992 | extern void afs_put_read(struct afs_read *); |
1da177e4 | 993 | |
d4438a25 DH |
994 | static inline struct afs_read *afs_get_read(struct afs_read *req) |
995 | { | |
996 | refcount_inc(&req->usage); | |
997 | return req; | |
998 | } | |
999 | ||
e8d6c554 DH |
1000 | /* |
1001 | * flock.c | |
1002 | */ | |
f044c884 DH |
1003 | extern struct workqueue_struct *afs_lock_manager; |
1004 | ||
a690f60a | 1005 | extern void afs_lock_op_done(struct afs_call *); |
e8d6c554 DH |
1006 | extern void afs_lock_work(struct work_struct *); |
1007 | extern void afs_lock_may_be_available(struct afs_vnode *); | |
1008 | extern int afs_lock(struct file *, int, struct file_lock *); | |
1009 | extern int afs_flock(struct file *, int, struct file_lock *); | |
1010 | ||
08e0e7c8 DH |
1011 | /* |
1012 | * fsclient.c | |
1013 | */ | |
e49c7b2f DH |
1014 | extern void afs_fs_fetch_status(struct afs_operation *); |
1015 | extern void afs_fs_fetch_data(struct afs_operation *); | |
1016 | extern void afs_fs_create_file(struct afs_operation *); | |
1017 | extern void afs_fs_make_dir(struct afs_operation *); | |
1018 | extern void afs_fs_remove_file(struct afs_operation *); | |
1019 | extern void afs_fs_remove_dir(struct afs_operation *); | |
1020 | extern void afs_fs_link(struct afs_operation *); | |
1021 | extern void afs_fs_symlink(struct afs_operation *); | |
1022 | extern void afs_fs_rename(struct afs_operation *); | |
1023 | extern void afs_fs_store_data(struct afs_operation *); | |
1024 | extern void afs_fs_setattr(struct afs_operation *); | |
1025 | extern void afs_fs_get_volume_status(struct afs_operation *); | |
1026 | extern void afs_fs_set_lock(struct afs_operation *); | |
1027 | extern void afs_fs_extend_lock(struct afs_operation *); | |
1028 | extern void afs_fs_release_lock(struct afs_operation *); | |
d2ddc776 DH |
1029 | extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, |
1030 | struct afs_addr_cursor *, struct key *); | |
f6cbb368 DH |
1031 | extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *, |
1032 | struct afs_addr_cursor *, struct key *); | |
e49c7b2f | 1033 | extern void afs_fs_inline_bulk_status(struct afs_operation *); |
08e0e7c8 | 1034 | |
260f082b DH |
1035 | struct afs_acl { |
1036 | u32 size; | |
1037 | u8 data[]; | |
1038 | }; | |
1039 | ||
e49c7b2f DH |
1040 | extern void afs_fs_fetch_acl(struct afs_operation *); |
1041 | extern void afs_fs_store_acl(struct afs_operation *); | |
1042 | ||
1043 | /* | |
1044 | * fs_operation.c | |
1045 | */ | |
1046 | extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); | |
1047 | extern int afs_put_operation(struct afs_operation *); | |
1048 | extern bool afs_begin_vnode_operation(struct afs_operation *); | |
1049 | extern void afs_wait_for_operation(struct afs_operation *); | |
1050 | extern int afs_do_sync_operation(struct afs_operation *); | |
1051 | ||
1052 | static inline void afs_op_nomem(struct afs_operation *op) | |
1053 | { | |
1054 | op->error = -ENOMEM; | |
1055 | } | |
1056 | ||
1057 | static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, | |
1058 | struct afs_vnode *vnode) | |
1059 | { | |
1060 | op->file[n].vnode = vnode; | |
1061 | op->file[n].need_io_lock = true; | |
1062 | } | |
1063 | ||
1064 | static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, | |
1065 | const struct afs_fid *fid) | |
1066 | { | |
1067 | op->file[n].fid = *fid; | |
1068 | } | |
260f082b | 1069 | |
3bf0fb6f DH |
1070 | /* |
1071 | * fs_probe.c | |
1072 | */ | |
1073 | extern void afs_fileserver_probe_result(struct afs_call *); | |
f6cbb368 | 1074 | extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool); |
3bf0fb6f | 1075 | extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long); |
8409f67b | 1076 | extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); |
f6cbb368 | 1077 | extern void afs_fs_probe_dispatcher(struct work_struct *); |
8409f67b | 1078 | extern int afs_wait_for_one_fs_probe(struct afs_server *, bool); |
5481fc6e | 1079 | extern void afs_fs_probe_cleanup(struct afs_net *); |
3bf0fb6f | 1080 | |
1da177e4 LT |
1081 | /* |
1082 | * inode.c | |
1083 | */ | |
b6489a49 DH |
1084 | extern const struct afs_operation_ops afs_fetch_status_operation; |
1085 | ||
e49c7b2f | 1086 | extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); |
a58823ac | 1087 | extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); |
e49c7b2f | 1088 | extern int afs_ilookup5_test_by_fid(struct inode *, void *); |
4d673da1 | 1089 | extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); |
e49c7b2f DH |
1090 | extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); |
1091 | extern struct inode *afs_root_iget(struct super_block *, struct key *); | |
c925bd0a | 1092 | extern bool afs_check_validity(struct afs_vnode *); |
260a9803 | 1093 | extern int afs_validate(struct afs_vnode *, struct key *); |
a528d35e | 1094 | extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); |
31143d5d | 1095 | extern int afs_setattr(struct dentry *, struct iattr *); |
b57922d9 | 1096 | extern void afs_evict_inode(struct inode *); |
bec5eb61 | 1097 | extern int afs_drop_inode(struct inode *); |
1da177e4 LT |
1098 | |
1099 | /* | |
1100 | * main.c | |
1101 | */ | |
0ad53eee | 1102 | extern struct workqueue_struct *afs_wq; |
5b86d4ff | 1103 | extern int afs_net_id; |
f044c884 | 1104 | |
5b86d4ff | 1105 | static inline struct afs_net *afs_net(struct net *net) |
f044c884 | 1106 | { |
5b86d4ff | 1107 | return net_generic(net, afs_net_id); |
f044c884 DH |
1108 | } |
1109 | ||
5b86d4ff | 1110 | static inline struct afs_net *afs_sb2net(struct super_block *sb) |
f044c884 | 1111 | { |
5b86d4ff | 1112 | return afs_net(AFS_FS_S(sb)->net_ns); |
f044c884 DH |
1113 | } |
1114 | ||
5b86d4ff | 1115 | static inline struct afs_net *afs_d2net(struct dentry *dentry) |
f044c884 | 1116 | { |
5b86d4ff | 1117 | return afs_sb2net(dentry->d_sb); |
f044c884 DH |
1118 | } |
1119 | ||
5b86d4ff | 1120 | static inline struct afs_net *afs_i2net(struct inode *inode) |
f044c884 | 1121 | { |
5b86d4ff | 1122 | return afs_sb2net(inode->i_sb); |
f044c884 DH |
1123 | } |
1124 | ||
5b86d4ff | 1125 | static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) |
f044c884 | 1126 | { |
5b86d4ff | 1127 | return afs_i2net(&vnode->vfs_inode); |
f044c884 DH |
1128 | } |
1129 | ||
5b86d4ff | 1130 | static inline struct afs_net *afs_sock2net(struct sock *sk) |
f044c884 | 1131 | { |
5b86d4ff | 1132 | return net_generic(sock_net(sk), afs_net_id); |
f044c884 | 1133 | } |
1da177e4 | 1134 | |
d55b4da4 DH |
1135 | static inline void __afs_stat(atomic_t *s) |
1136 | { | |
1137 | atomic_inc(s); | |
1138 | } | |
1139 | ||
1140 | #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) | |
1141 | ||
08e0e7c8 DH |
1142 | /* |
1143 | * misc.c | |
1144 | */ | |
1145 | extern int afs_abort_to_error(u32); | |
4584ae96 | 1146 | extern void afs_prioritise_error(struct afs_error *, int, u32); |
08e0e7c8 | 1147 | |
1da177e4 LT |
1148 | /* |
1149 | * mntpt.c | |
1150 | */ | |
754661f1 | 1151 | extern const struct inode_operations afs_mntpt_inode_operations; |
bec5eb61 | 1152 | extern const struct inode_operations afs_autocell_inode_operations; |
4b6f5d20 | 1153 | extern const struct file_operations afs_mntpt_file_operations; |
1da177e4 | 1154 | |
d18610b0 | 1155 | extern struct vfsmount *afs_d_automount(struct path *); |
08e0e7c8 | 1156 | extern void afs_mntpt_kill_timer(void); |
1da177e4 | 1157 | |
1da177e4 LT |
1158 | /* |
1159 | * proc.c | |
1160 | */ | |
b6cfbeca | 1161 | #ifdef CONFIG_PROC_FS |
f044c884 DH |
1162 | extern int __net_init afs_proc_init(struct afs_net *); |
1163 | extern void __net_exit afs_proc_cleanup(struct afs_net *); | |
5b86d4ff DH |
1164 | extern int afs_proc_cell_setup(struct afs_cell *); |
1165 | extern void afs_proc_cell_remove(struct afs_cell *); | |
6f8880d8 | 1166 | extern void afs_put_sysnames(struct afs_sysnames *); |
b6cfbeca DH |
1167 | #else |
1168 | static inline int afs_proc_init(struct afs_net *net) { return 0; } | |
1169 | static inline void afs_proc_cleanup(struct afs_net *net) {} | |
1170 | static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } | |
1171 | static inline void afs_proc_cell_remove(struct afs_cell *cell) {} | |
1172 | static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} | |
1173 | #endif | |
1da177e4 | 1174 | |
d2ddc776 DH |
1175 | /* |
1176 | * rotate.c | |
1177 | */ | |
a310082f | 1178 | extern bool afs_select_fileserver(struct afs_operation *); |
e49c7b2f | 1179 | extern void afs_dump_edestaddrreq(const struct afs_operation *); |
d2ddc776 | 1180 | |
08e0e7c8 DH |
1181 | /* |
1182 | * rxrpc.c | |
1183 | */ | |
f044c884 | 1184 | extern struct workqueue_struct *afs_async_calls; |
8324f0bc | 1185 | |
f044c884 DH |
1186 | extern int __net_init afs_open_socket(struct afs_net *); |
1187 | extern void __net_exit afs_close_socket(struct afs_net *); | |
1188 | extern void afs_charge_preallocation(struct work_struct *); | |
341f741f | 1189 | extern void afs_put_call(struct afs_call *); |
0b9bf381 DH |
1190 | extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t); |
1191 | extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *); | |
f044c884 DH |
1192 | extern struct afs_call *afs_alloc_flat_call(struct afs_net *, |
1193 | const struct afs_call_type *, | |
08e0e7c8 DH |
1194 | size_t, size_t); |
1195 | extern void afs_flat_call_destructor(struct afs_call *); | |
08e0e7c8 | 1196 | extern void afs_send_empty_reply(struct afs_call *); |
b908fe6b | 1197 | extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); |
12bdcf33 | 1198 | extern int afs_extract_data(struct afs_call *, bool); |
7126ead9 | 1199 | extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); |
08e0e7c8 | 1200 | |
e49c7b2f DH |
1201 | static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, |
1202 | gfp_t gfp) | |
20b8391f | 1203 | { |
e49c7b2f | 1204 | op->call = call; |
a310082f | 1205 | op->type = call->type; |
e49c7b2f DH |
1206 | call->op = op; |
1207 | call->key = op->key; | |
e49c7b2f DH |
1208 | call->intr = !(op->flags & AFS_OPERATION_UNINTR); |
1209 | afs_make_call(&op->ac, call, gfp); | |
20b8391f DH |
1210 | } |
1211 | ||
12bdcf33 DH |
1212 | static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) |
1213 | { | |
1214 | call->kvec[0].iov_base = buf; | |
1215 | call->kvec[0].iov_len = size; | |
fc276122 | 1216 | iov_iter_kvec(&call->def_iter, READ, call->kvec, 1, size); |
12bdcf33 DH |
1217 | } |
1218 | ||
1219 | static inline void afs_extract_to_tmp(struct afs_call *call) | |
1220 | { | |
1221 | afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); | |
1222 | } | |
1223 | ||
1224 | static inline void afs_extract_to_tmp64(struct afs_call *call) | |
1225 | { | |
1226 | afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); | |
1227 | } | |
1228 | ||
1229 | static inline void afs_extract_discard(struct afs_call *call, size_t size) | |
1230 | { | |
fc276122 | 1231 | iov_iter_discard(&call->def_iter, READ, size); |
12bdcf33 DH |
1232 | } |
1233 | ||
1234 | static inline void afs_extract_to_buf(struct afs_call *call, size_t size) | |
1235 | { | |
1236 | afs_extract_begin(call, call->buffer, size); | |
1237 | } | |
1238 | ||
d001648e | 1239 | static inline int afs_transfer_reply(struct afs_call *call) |
372ee163 | 1240 | { |
12bdcf33 | 1241 | return afs_extract_data(call, false); |
372ee163 DH |
1242 | } |
1243 | ||
98bf40cd DH |
1244 | static inline bool afs_check_call_state(struct afs_call *call, |
1245 | enum afs_call_state state) | |
1246 | { | |
1247 | return READ_ONCE(call->state) == state; | |
1248 | } | |
1249 | ||
1250 | static inline bool afs_set_call_state(struct afs_call *call, | |
1251 | enum afs_call_state from, | |
1252 | enum afs_call_state to) | |
1253 | { | |
1254 | bool ok = false; | |
1255 | ||
1256 | spin_lock_bh(&call->state_lock); | |
1257 | if (call->state == from) { | |
1258 | call->state = to; | |
1259 | trace_afs_call_state(call, from, to, 0, 0); | |
1260 | ok = true; | |
1261 | } | |
1262 | spin_unlock_bh(&call->state_lock); | |
1263 | return ok; | |
1264 | } | |
1265 | ||
1266 | static inline void afs_set_call_complete(struct afs_call *call, | |
1267 | int error, u32 remote_abort) | |
1268 | { | |
1269 | enum afs_call_state state; | |
1270 | bool ok = false; | |
1271 | ||
1272 | spin_lock_bh(&call->state_lock); | |
1273 | state = call->state; | |
1274 | if (state != AFS_CALL_COMPLETE) { | |
1275 | call->abort_code = remote_abort; | |
1276 | call->error = error; | |
1277 | call->state = AFS_CALL_COMPLETE; | |
1278 | trace_afs_call_state(call, state, AFS_CALL_COMPLETE, | |
1279 | error, remote_abort); | |
1280 | ok = true; | |
1281 | } | |
1282 | spin_unlock_bh(&call->state_lock); | |
dde9f095 | 1283 | if (ok) { |
98bf40cd | 1284 | trace_afs_call_done(call); |
dde9f095 DH |
1285 | |
1286 | /* Asynchronous calls have two refs to release - one from the alloc and | |
1287 | * one queued with the work item - and we can't just deallocate the | |
1288 | * call because the work item may be queued again. | |
1289 | */ | |
1290 | if (call->drop_ref) | |
1291 | afs_put_call(call); | |
1292 | } | |
98bf40cd DH |
1293 | } |
1294 | ||
00d3b7a4 DH |
1295 | /* |
1296 | * security.c | |
1297 | */ | |
be080a6f | 1298 | extern void afs_put_permits(struct afs_permits *); |
00d3b7a4 | 1299 | extern void afs_clear_permits(struct afs_vnode *); |
a58823ac DH |
1300 | extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, |
1301 | struct afs_status_cb *); | |
416351f2 | 1302 | extern void afs_zap_permits(struct rcu_head *); |
00d3b7a4 | 1303 | extern struct key *afs_request_key(struct afs_cell *); |
8b6a666a | 1304 | extern struct key *afs_request_key_rcu(struct afs_cell *); |
0fafdc9f | 1305 | extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); |
10556cb2 | 1306 | extern int afs_permission(struct inode *, int); |
be080a6f | 1307 | extern void __exit afs_clean_up_permit_cache(void); |
00d3b7a4 | 1308 | |
08e0e7c8 DH |
1309 | /* |
1310 | * server.c | |
1311 | */ | |
1312 | extern spinlock_t afs_server_peer_lock; | |
1313 | ||
f044c884 DH |
1314 | extern struct afs_server *afs_find_server(struct afs_net *, |
1315 | const struct sockaddr_rxrpc *); | |
d2ddc776 | 1316 | extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); |
81006805 | 1317 | extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); |
45218193 | 1318 | extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); |
977e5f8e DH |
1319 | extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace); |
1320 | extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace); | |
1321 | extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace); | |
45218193 | 1322 | extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); |
d2ddc776 DH |
1323 | extern void afs_manage_servers(struct work_struct *); |
1324 | extern void afs_servers_timer(struct timer_list *); | |
f6cbb368 | 1325 | extern void afs_fs_probe_timer(struct timer_list *); |
f044c884 | 1326 | extern void __net_exit afs_purge_servers(struct afs_net *); |
a310082f | 1327 | extern bool afs_check_server_record(struct afs_operation *, struct afs_server *); |
08e0e7c8 | 1328 | |
f6cbb368 DH |
1329 | static inline void afs_inc_servers_outstanding(struct afs_net *net) |
1330 | { | |
1331 | atomic_inc(&net->servers_outstanding); | |
1332 | } | |
1333 | ||
1334 | static inline void afs_dec_servers_outstanding(struct afs_net *net) | |
1335 | { | |
1336 | if (atomic_dec_and_test(&net->servers_outstanding)) | |
1337 | wake_up_var(&net->servers_outstanding); | |
1338 | } | |
1339 | ||
1340 | static inline bool afs_is_probing_server(struct afs_server *server) | |
1341 | { | |
1342 | return list_empty(&server->probe_link); | |
1343 | } | |
1344 | ||
00d3b7a4 | 1345 | /* |
d2ddc776 | 1346 | * server_list.c |
00d3b7a4 | 1347 | */ |
d2ddc776 DH |
1348 | static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) |
1349 | { | |
1350 | refcount_inc(&slist->usage); | |
1351 | return slist; | |
1352 | } | |
00d3b7a4 | 1353 | |
d2ddc776 DH |
1354 | extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); |
1355 | extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, | |
1356 | struct afs_vldb_entry *, | |
1357 | u8); | |
1358 | extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); | |
08e0e7c8 DH |
1359 | |
1360 | /* | |
d2ddc776 | 1361 | * super.c |
08e0e7c8 | 1362 | */ |
d2ddc776 | 1363 | extern int __init afs_fs_init(void); |
5b86d4ff | 1364 | extern void afs_fs_exit(void); |
08e0e7c8 DH |
1365 | |
1366 | /* | |
d2ddc776 | 1367 | * vlclient.c |
08e0e7c8 | 1368 | */ |
0a5143f2 DH |
1369 | extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, |
1370 | const char *, int); | |
1371 | extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); | |
0b9bf381 DH |
1372 | extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, |
1373 | struct key *, struct afs_vlserver *, unsigned int); | |
0a5143f2 | 1374 | extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); |
c3e9f888 | 1375 | extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); |
0a5143f2 | 1376 | |
8a070a96 DH |
1377 | /* |
1378 | * vl_alias.c | |
1379 | */ | |
1380 | extern int afs_cell_detect_alias(struct afs_cell *, struct key *); | |
1381 | ||
3bf0fb6f DH |
1382 | /* |
1383 | * vl_probe.c | |
1384 | */ | |
1385 | extern void afs_vlserver_probe_result(struct afs_call *); | |
1386 | extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); | |
1387 | extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); | |
1388 | ||
0a5143f2 DH |
1389 | /* |
1390 | * vl_rotate.c | |
1391 | */ | |
1392 | extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, | |
1393 | struct afs_cell *, struct key *); | |
1394 | extern bool afs_select_vlserver(struct afs_vl_cursor *); | |
1395 | extern bool afs_select_current_vlserver(struct afs_vl_cursor *); | |
1396 | extern int afs_end_vlserver_operation(struct afs_vl_cursor *); | |
1397 | ||
1398 | /* | |
1399 | * vlserver_list.c | |
1400 | */ | |
1401 | static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) | |
1402 | { | |
1403 | atomic_inc(&vlserver->usage); | |
1404 | return vlserver; | |
1405 | } | |
1406 | ||
1407 | static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) | |
1408 | { | |
1409 | if (vllist) | |
1410 | atomic_inc(&vllist->usage); | |
1411 | return vllist; | |
1412 | } | |
1413 | ||
1414 | extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); | |
1415 | extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); | |
1416 | extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); | |
1417 | extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); | |
1418 | extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, | |
1419 | const void *, size_t); | |
08e0e7c8 DH |
1420 | |
1421 | /* | |
1422 | * volume.c | |
1423 | */ | |
13fcc683 | 1424 | extern struct afs_volume *afs_create_volume(struct afs_fs_context *); |
d2ddc776 DH |
1425 | extern void afs_activate_volume(struct afs_volume *); |
1426 | extern void afs_deactivate_volume(struct afs_volume *); | |
cca37d45 DH |
1427 | extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); |
1428 | extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace); | |
a310082f | 1429 | extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); |
08e0e7c8 | 1430 | |
31143d5d DH |
1431 | /* |
1432 | * write.c | |
1433 | */ | |
1434 | extern int afs_set_page_dirty(struct page *); | |
15b4650e NP |
1435 | extern int afs_write_begin(struct file *file, struct address_space *mapping, |
1436 | loff_t pos, unsigned len, unsigned flags, | |
1437 | struct page **pagep, void **fsdata); | |
1438 | extern int afs_write_end(struct file *file, struct address_space *mapping, | |
1439 | loff_t pos, unsigned len, unsigned copied, | |
1440 | struct page *page, void *fsdata); | |
31143d5d DH |
1441 | extern int afs_writepage(struct page *, struct writeback_control *); |
1442 | extern int afs_writepages(struct address_space *, struct writeback_control *); | |
50b5551d | 1443 | extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); |
02c24a82 | 1444 | extern int afs_fsync(struct file *, loff_t, loff_t, int); |
0722f186 | 1445 | extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); |
4343d008 DH |
1446 | extern void afs_prune_wb_keys(struct afs_vnode *); |
1447 | extern int afs_launder_page(struct page *); | |
31143d5d | 1448 | |
d3e3b7ea DH |
1449 | /* |
1450 | * xattr.c | |
1451 | */ | |
1452 | extern const struct xattr_handler *afs_xattr_handlers[]; | |
1453 | extern ssize_t afs_listxattr(struct dentry *, char *, size_t); | |
31143d5d | 1454 | |
30062bd1 DH |
1455 | /* |
1456 | * yfsclient.c | |
1457 | */ | |
e49c7b2f DH |
1458 | extern void yfs_fs_fetch_data(struct afs_operation *); |
1459 | extern void yfs_fs_create_file(struct afs_operation *); | |
1460 | extern void yfs_fs_make_dir(struct afs_operation *); | |
1461 | extern void yfs_fs_remove_file2(struct afs_operation *); | |
1462 | extern void yfs_fs_remove_file(struct afs_operation *); | |
1463 | extern void yfs_fs_remove_dir(struct afs_operation *); | |
1464 | extern void yfs_fs_link(struct afs_operation *); | |
1465 | extern void yfs_fs_symlink(struct afs_operation *); | |
1466 | extern void yfs_fs_rename(struct afs_operation *); | |
1467 | extern void yfs_fs_store_data(struct afs_operation *); | |
1468 | extern void yfs_fs_setattr(struct afs_operation *); | |
1469 | extern void yfs_fs_get_volume_status(struct afs_operation *); | |
1470 | extern void yfs_fs_set_lock(struct afs_operation *); | |
1471 | extern void yfs_fs_extend_lock(struct afs_operation *); | |
1472 | extern void yfs_fs_release_lock(struct afs_operation *); | |
1473 | extern void yfs_fs_fetch_status(struct afs_operation *); | |
1474 | extern void yfs_fs_inline_bulk_status(struct afs_operation *); | |
d2ddc776 | 1475 | |
ae46578b DH |
1476 | struct yfs_acl { |
1477 | struct afs_acl *acl; /* Dir/file/symlink ACL */ | |
1478 | struct afs_acl *vol_acl; /* Whole volume ACL */ | |
1479 | u32 inherit_flag; /* True if ACL is inherited from parent dir */ | |
1480 | u32 num_cleaned; /* Number of ACEs removed due to subject removal */ | |
1481 | unsigned int flags; | |
1482 | #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ | |
1483 | #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ | |
1484 | }; | |
1485 | ||
1486 | extern void yfs_free_opaque_acl(struct yfs_acl *); | |
e49c7b2f DH |
1487 | extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); |
1488 | extern void yfs_fs_store_opaque_acl2(struct afs_operation *); | |
ae46578b | 1489 | |
d2ddc776 DH |
1490 | /* |
1491 | * Miscellaneous inline functions. | |
1492 | */ | |
1493 | static inline struct afs_vnode *AFS_FS_I(struct inode *inode) | |
1494 | { | |
1495 | return container_of(inode, struct afs_vnode, vfs_inode); | |
1496 | } | |
1497 | ||
1498 | static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) | |
1499 | { | |
1500 | return &vnode->vfs_inode; | |
1501 | } | |
1502 | ||
e49c7b2f DH |
1503 | /* |
1504 | * Note that a dentry got changed. We need to set d_fsdata to the data version | |
1505 | * number derived from the result of the operation. It doesn't matter if | |
1506 | * d_fsdata goes backwards as we'll just revalidate. | |
1507 | */ | |
1508 | static inline void afs_update_dentry_version(struct afs_operation *op, | |
1509 | struct afs_vnode_param *dir_vp, | |
1510 | struct dentry *dentry) | |
1511 | { | |
1512 | if (!op->error) | |
1513 | dentry->d_fsdata = | |
1514 | (void *)(unsigned long)dir_vp->scb.status.data_version; | |
1515 | } | |
1516 | ||
b6489a49 DH |
1517 | /* |
1518 | * Check for a conflicting operation on a directory that we just unlinked from. | |
1519 | * If someone managed to sneak a link or an unlink in on the file we just | |
1520 | * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). | |
1521 | */ | |
1522 | static inline void afs_check_dir_conflict(struct afs_operation *op, | |
1523 | struct afs_vnode_param *dvp) | |
1524 | { | |
1525 | if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) | |
1526 | op->flags |= AFS_OPERATION_DIR_CONFLICT; | |
1527 | } | |
1528 | ||
f51375cd DH |
1529 | static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) |
1530 | { | |
1531 | trace_afs_io_error(call->debug_id, -EIO, where); | |
1532 | return -EIO; | |
1533 | } | |
1534 | ||
1535 | static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) | |
1536 | { | |
1537 | trace_afs_file_error(vnode, -EIO, where); | |
1538 | return -EIO; | |
1539 | } | |
d2ddc776 | 1540 | |
08e0e7c8 DH |
1541 | /*****************************************************************************/ |
1542 | /* | |
1543 | * debug tracing | |
1544 | */ | |
1545 | extern unsigned afs_debug; | |
1546 | ||
1547 | #define dbgprintk(FMT,...) \ | |
ad16df84 | 1548 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
08e0e7c8 | 1549 | |
530b6412 HH |
1550 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1551 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
08e0e7c8 DH |
1552 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
1553 | ||
1554 | ||
1555 | #if defined(__KDEBUG) | |
1556 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
1557 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
1558 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
1559 | ||
1560 | #elif defined(CONFIG_AFS_DEBUG) | |
1561 | #define AFS_DEBUG_KENTER 0x01 | |
1562 | #define AFS_DEBUG_KLEAVE 0x02 | |
1563 | #define AFS_DEBUG_KDEBUG 0x04 | |
1564 | ||
1565 | #define _enter(FMT,...) \ | |
1566 | do { \ | |
1567 | if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ | |
1568 | kenter(FMT,##__VA_ARGS__); \ | |
1569 | } while (0) | |
1570 | ||
1571 | #define _leave(FMT,...) \ | |
1572 | do { \ | |
1573 | if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ | |
1574 | kleave(FMT,##__VA_ARGS__); \ | |
1575 | } while (0) | |
1576 | ||
1577 | #define _debug(FMT,...) \ | |
1578 | do { \ | |
1579 | if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ | |
1580 | kdebug(FMT,##__VA_ARGS__); \ | |
1581 | } while (0) | |
1582 | ||
1583 | #else | |
12fdff3f DH |
1584 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
1585 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
1586 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
08e0e7c8 DH |
1587 | #endif |
1588 | ||
1589 | /* | |
1590 | * debug assertion checking | |
1591 | */ | |
1592 | #if 1 // defined(__KDEBUGALL) | |
1593 | ||
1594 | #define ASSERT(X) \ | |
1595 | do { \ | |
1596 | if (unlikely(!(X))) { \ | |
1597 | printk(KERN_ERR "\n"); \ | |
1598 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1599 | BUG(); \ | |
1600 | } \ | |
1601 | } while(0) | |
1602 | ||
1603 | #define ASSERTCMP(X, OP, Y) \ | |
1604 | do { \ | |
1605 | if (unlikely(!((X) OP (Y)))) { \ | |
1606 | printk(KERN_ERR "\n"); \ | |
1607 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1608 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
1609 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1610 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
1611 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1612 | BUG(); \ | |
1613 | } \ | |
1614 | } while(0) | |
1615 | ||
416351f2 DH |
1616 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
1617 | do { \ | |
1618 | if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ | |
1619 | printk(KERN_ERR "\n"); \ | |
1620 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1621 | printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ | |
1622 | (unsigned long)(L), (unsigned long)(N), \ | |
1623 | (unsigned long)(H)); \ | |
1624 | printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ | |
1625 | (unsigned long)(L), (unsigned long)(N), \ | |
1626 | (unsigned long)(H)); \ | |
1627 | BUG(); \ | |
1628 | } \ | |
1629 | } while(0) | |
1630 | ||
08e0e7c8 DH |
1631 | #define ASSERTIF(C, X) \ |
1632 | do { \ | |
1633 | if (unlikely((C) && !(X))) { \ | |
1634 | printk(KERN_ERR "\n"); \ | |
1635 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1636 | BUG(); \ | |
1637 | } \ | |
1638 | } while(0) | |
1639 | ||
1640 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1641 | do { \ | |
1642 | if (unlikely((C) && !((X) OP (Y)))) { \ | |
1643 | printk(KERN_ERR "\n"); \ | |
1644 | printk(KERN_ERR "AFS: Assertion failed\n"); \ | |
1645 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ | |
1646 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1647 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ | |
1648 | (unsigned long)(X), (unsigned long)(Y)); \ | |
1649 | BUG(); \ | |
1650 | } \ | |
1651 | } while(0) | |
1652 | ||
1653 | #else | |
1654 | ||
1655 | #define ASSERT(X) \ | |
1656 | do { \ | |
1657 | } while(0) | |
1658 | ||
1659 | #define ASSERTCMP(X, OP, Y) \ | |
1660 | do { \ | |
1661 | } while(0) | |
1662 | ||
416351f2 DH |
1663 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
1664 | do { \ | |
1665 | } while(0) | |
1666 | ||
08e0e7c8 DH |
1667 | #define ASSERTIF(C, X) \ |
1668 | do { \ | |
1669 | } while(0) | |
1670 | ||
1671 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
1672 | do { \ | |
1673 | } while(0) | |
1674 | ||
1675 | #endif /* __KDEBUGALL */ |