David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 1 | /* internal AFS stuff |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 3 | * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | */ |
| 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/compiler.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/fs.h> |
| 15 | #include <linux/pagemap.h> |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 16 | #include <linux/skbuff.h> |
| 17 | #include <linux/rxrpc.h> |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 18 | #include <linux/key.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 19 | #include <linux/workqueue.h> |
Andrew Morton | 00c541e | 2007-05-31 00:40:52 -0700 | [diff] [blame] | 20 | #include <linux/sched.h> |
Christoph Hellwig | 80e50be | 2009-10-01 15:44:27 -0700 | [diff] [blame] | 21 | #include <linux/fscache.h> |
Jens Axboe | e1da022 | 2010-04-22 11:58:18 +0200 | [diff] [blame] | 22 | #include <linux/backing-dev.h> |
Andrew Morton | 00c541e | 2007-05-31 00:40:52 -0700 | [diff] [blame] | 23 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 24 | #include "afs.h" |
| 25 | #include "afs_vl.h" |
| 26 | |
| 27 | #define AFS_CELL_MAX_ADDRS 15 |
| 28 | |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 29 | struct pagevec; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 30 | struct afs_call; |
| 31 | |
| 32 | typedef enum { |
| 33 | AFS_VL_NEW, /* new, uninitialised record */ |
| 34 | AFS_VL_CREATING, /* creating record */ |
| 35 | AFS_VL_VALID, /* record is pending */ |
| 36 | AFS_VL_NO_VOLUME, /* no such volume available */ |
| 37 | AFS_VL_UPDATING, /* update in progress */ |
| 38 | AFS_VL_VOLUME_DELETED, /* volume was deleted */ |
| 39 | AFS_VL_UNCERTAIN, /* uncertain state (update failed) */ |
| 40 | } __attribute__((packed)) afs_vlocation_state_t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 42 | struct afs_mount_params { |
| 43 | bool rwpath; /* T if the parent should be considered R/W */ |
| 44 | bool force; /* T to force cell type */ |
wanglei | bec5eb6 | 2010-08-11 09:38:04 +0100 | [diff] [blame] | 45 | bool autocell; /* T if set auto mount operation */ |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 46 | afs_voltype_t type; /* type of volume requested */ |
| 47 | int volnamesz; /* size of volume name */ |
| 48 | const char *volname; /* name of volume to mount */ |
| 49 | struct afs_cell *cell; /* cell in which to find volume */ |
| 50 | struct afs_volume *volume; /* volume record */ |
| 51 | struct key *key; /* key to use for secure mounting */ |
| 52 | }; |
| 53 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 55 | * definition of how to wait for the completion of an operation |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 57 | struct afs_wait_mode { |
| 58 | /* RxRPC received message notification */ |
| 59 | void (*rx_wakeup)(struct afs_call *call); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 61 | /* synchronous call waiter and call dispatched notification */ |
| 62 | int (*wait)(struct afs_call *call); |
| 63 | |
| 64 | /* asynchronous call completion */ |
| 65 | void (*async_complete)(void *reply, int error); |
| 66 | }; |
| 67 | |
| 68 | extern const struct afs_wait_mode afs_sync_call; |
| 69 | extern const struct afs_wait_mode afs_async_call; |
| 70 | |
| 71 | /* |
| 72 | * a record of an in-progress RxRPC call |
| 73 | */ |
| 74 | struct afs_call { |
| 75 | const struct afs_call_type *type; /* type of call */ |
| 76 | const struct afs_wait_mode *wait_mode; /* completion wait mode */ |
| 77 | wait_queue_head_t waitq; /* processes awaiting completion */ |
David Howells | 656f88d | 2014-05-21 15:55:26 +0100 | [diff] [blame] | 78 | void (*async_workfn)(struct afs_call *call); /* asynchronous work function */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 79 | struct work_struct async_work; /* asynchronous work processor */ |
| 80 | struct work_struct work; /* actual work processor */ |
| 81 | struct sk_buff_head rx_queue; /* received packets */ |
| 82 | struct rxrpc_call *rxcall; /* RxRPC call handle */ |
| 83 | struct key *key; /* security for this call */ |
| 84 | struct afs_server *server; /* server affected by incoming CM call */ |
| 85 | void *request; /* request data (first part) */ |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 86 | struct address_space *mapping; /* page set */ |
| 87 | struct afs_writeback *wb; /* writeback being performed */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 88 | void *buffer; /* reply receive buffer */ |
| 89 | void *reply; /* reply buffer (first part) */ |
| 90 | void *reply2; /* reply buffer (second part) */ |
| 91 | void *reply3; /* reply buffer (third part) */ |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 92 | void *reply4; /* reply buffer (fourth part) */ |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 93 | pgoff_t first; /* first page in mapping to deal with */ |
| 94 | pgoff_t last; /* last page in mapping to deal with */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 95 | enum { /* call state */ |
| 96 | AFS_CALL_REQUESTING, /* request is being sent for outgoing call */ |
| 97 | AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */ |
| 98 | AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */ |
| 99 | AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */ |
| 100 | AFS_CALL_REPLYING, /* replying to incoming call */ |
| 101 | AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */ |
| 102 | AFS_CALL_COMPLETE, /* successfully completed */ |
| 103 | AFS_CALL_BUSY, /* server was busy */ |
| 104 | AFS_CALL_ABORTED, /* call was aborted */ |
| 105 | AFS_CALL_ERROR, /* call failed due to error */ |
| 106 | } state; |
| 107 | int error; /* error code */ |
| 108 | unsigned request_size; /* size of request data */ |
| 109 | unsigned reply_max; /* maximum size of reply */ |
| 110 | unsigned reply_size; /* current size of reply */ |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 111 | unsigned first_offset; /* offset into mapping[first] */ |
| 112 | unsigned last_to; /* amount of mapping[last] */ |
Anton Blanchard | 2c724fb | 2012-03-16 10:28:07 +0000 | [diff] [blame] | 113 | unsigned offset; /* offset into received data store */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 114 | unsigned char unmarshall; /* unmarshalling phase */ |
| 115 | bool incoming; /* T if incoming call */ |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 116 | bool send_pages; /* T if data from mapping should be sent */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 117 | u16 service_id; /* RxRPC service ID to call */ |
| 118 | __be16 port; /* target UDP port */ |
| 119 | __be32 operation_ID; /* operation ID for an incoming call */ |
| 120 | u32 count; /* count for use in unmarshalling */ |
| 121 | __be32 tmp; /* place to extract temporary data */ |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 122 | afs_dataversion_t store_version; /* updated version expected from store */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 123 | }; |
| 124 | |
| 125 | struct afs_call_type { |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 126 | const char *name; |
| 127 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 128 | /* deliver request or reply data to an call |
| 129 | * - returning an error will cause the call to be aborted |
| 130 | */ |
| 131 | int (*deliver)(struct afs_call *call, struct sk_buff *skb, |
| 132 | bool last); |
| 133 | |
| 134 | /* map an abort code to an error number */ |
| 135 | int (*abort_to_error)(u32 abort_code); |
| 136 | |
| 137 | /* clean up a call */ |
| 138 | void (*destructor)(struct afs_call *call); |
| 139 | }; |
| 140 | |
| 141 | /* |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 142 | * record of an outstanding writeback on a vnode |
| 143 | */ |
| 144 | struct afs_writeback { |
| 145 | struct list_head link; /* link in vnode->writebacks */ |
| 146 | struct work_struct writer; /* work item to perform the writeback */ |
| 147 | struct afs_vnode *vnode; /* vnode to which this write applies */ |
| 148 | struct key *key; /* owner of this write */ |
| 149 | wait_queue_head_t waitq; /* completion and ready wait queue */ |
| 150 | pgoff_t first; /* first page in batch */ |
| 151 | pgoff_t point; /* last page in current store op */ |
| 152 | pgoff_t last; /* last page in batch (inclusive) */ |
| 153 | unsigned offset_first; /* offset into first page of start of write */ |
| 154 | unsigned to_last; /* offset into last page of end of write */ |
| 155 | int num_conflicts; /* count of conflicting writes in list */ |
| 156 | int usage; |
| 157 | bool conflicts; /* T if has dependent conflicts */ |
| 158 | enum { |
| 159 | AFS_WBACK_SYNCING, /* synchronisation being performed */ |
| 160 | AFS_WBACK_PENDING, /* write pending */ |
| 161 | AFS_WBACK_CONFLICTING, /* conflicting writes posted */ |
| 162 | AFS_WBACK_WRITING, /* writing back */ |
| 163 | AFS_WBACK_COMPLETE /* the writeback record has been unlinked */ |
| 164 | } state __attribute__((packed)); |
| 165 | }; |
| 166 | |
| 167 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 168 | * AFS superblock private data |
| 169 | * - there's one superblock per volume |
| 170 | */ |
| 171 | struct afs_super_info { |
| 172 | struct afs_volume *volume; /* volume record */ |
| 173 | char rwparent; /* T if parent is R/W AFS volume */ |
| 174 | }; |
| 175 | |
| 176 | static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
| 177 | { |
| 178 | return sb->s_fs_info; |
| 179 | } |
| 180 | |
| 181 | extern struct file_system_type afs_fs_type; |
| 182 | |
| 183 | /* |
| 184 | * entry in the cached cell catalogue |
| 185 | */ |
| 186 | struct afs_cache_cell { |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 187 | char name[AFS_MAXCELLNAME]; /* cell name (padded with NULs) */ |
| 188 | struct in_addr vl_servers[15]; /* cached cell VL servers */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 189 | }; |
| 190 | |
| 191 | /* |
| 192 | * AFS cell record |
| 193 | */ |
| 194 | struct afs_cell { |
| 195 | atomic_t usage; |
| 196 | struct list_head link; /* main cell list link */ |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 197 | struct key *anonymous_key; /* anonymous user key for this cell */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 198 | struct list_head proc_link; /* /proc cell list link */ |
David Howells | 9b3f26c | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 199 | #ifdef CONFIG_AFS_FSCACHE |
| 200 | struct fscache_cookie *cache; /* caching cookie */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | #endif |
| 202 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 203 | /* server record management */ |
| 204 | rwlock_t servers_lock; /* active server list lock */ |
| 205 | struct list_head servers; /* active server list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 207 | /* volume location record management */ |
| 208 | struct rw_semaphore vl_sem; /* volume management serialisation semaphore */ |
| 209 | struct list_head vl_list; /* cell's active VL record list */ |
| 210 | spinlock_t vl_lock; /* vl_list lock */ |
| 211 | unsigned short vl_naddrs; /* number of VL servers in addr list */ |
| 212 | unsigned short vl_curr_svix; /* current server index */ |
| 213 | struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */ |
| 214 | |
| 215 | char name[0]; /* cell name - must go last */ |
| 216 | }; |
| 217 | |
| 218 | /* |
| 219 | * entry in the cached volume location catalogue |
| 220 | */ |
| 221 | struct afs_cache_vlocation { |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 222 | /* volume name (lowercase, padded with NULs) */ |
| 223 | uint8_t name[AFS_MAXVOLNAME + 1]; |
| 224 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 225 | uint8_t nservers; /* number of entries used in servers[] */ |
| 226 | uint8_t vidmask; /* voltype mask for vid[] */ |
| 227 | uint8_t srvtmask[8]; /* voltype masks for servers[] */ |
| 228 | #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ |
| 229 | #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ |
| 230 | #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ |
| 231 | |
| 232 | afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */ |
| 233 | struct in_addr servers[8]; /* fileserver addresses */ |
| 234 | time_t rtime; /* last retrieval time */ |
| 235 | }; |
| 236 | |
| 237 | /* |
| 238 | * volume -> vnode hash table entry |
| 239 | */ |
| 240 | struct afs_cache_vhash { |
| 241 | afs_voltype_t vtype; /* which volume variation */ |
| 242 | uint8_t hash_bucket; /* which hash bucket this represents */ |
| 243 | } __attribute__((packed)); |
| 244 | |
| 245 | /* |
| 246 | * AFS volume location record |
| 247 | */ |
| 248 | struct afs_vlocation { |
| 249 | atomic_t usage; |
| 250 | time_t time_of_death; /* time at which put reduced usage to 0 */ |
| 251 | struct list_head link; /* link in cell volume location list */ |
| 252 | struct list_head grave; /* link in master graveyard list */ |
| 253 | struct list_head update; /* link in master update list */ |
| 254 | struct afs_cell *cell; /* cell to which volume belongs */ |
David Howells | 9b3f26c | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 255 | #ifdef CONFIG_AFS_FSCACHE |
| 256 | struct fscache_cookie *cache; /* caching cookie */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 257 | #endif |
| 258 | struct afs_cache_vlocation vldb; /* volume information DB record */ |
| 259 | struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ |
| 260 | wait_queue_head_t waitq; /* status change waitqueue */ |
| 261 | time_t update_at; /* time at which record should be updated */ |
David S. Miller | 39bf094 | 2007-04-26 20:39:14 -0700 | [diff] [blame] | 262 | spinlock_t lock; /* access lock */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 263 | afs_vlocation_state_t state; /* volume location state */ |
| 264 | unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ |
| 265 | unsigned short upd_busy_cnt; /* EBUSY count during update */ |
| 266 | bool valid; /* T if valid */ |
| 267 | }; |
| 268 | |
| 269 | /* |
| 270 | * AFS fileserver record |
| 271 | */ |
| 272 | struct afs_server { |
| 273 | atomic_t usage; |
| 274 | time_t time_of_death; /* time at which put reduced usage to 0 */ |
| 275 | struct in_addr addr; /* server address */ |
| 276 | struct afs_cell *cell; /* cell in which server resides */ |
| 277 | struct list_head link; /* link in cell's server list */ |
| 278 | struct list_head grave; /* link in master graveyard list */ |
| 279 | struct rb_node master_rb; /* link in master by-addr tree */ |
| 280 | struct rw_semaphore sem; /* access lock */ |
| 281 | |
| 282 | /* file service access */ |
| 283 | struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */ |
| 284 | unsigned long fs_act_jif; /* time at which last activity occurred */ |
| 285 | unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ |
| 286 | spinlock_t fs_lock; /* access lock */ |
| 287 | int fs_state; /* 0 or reason FS currently marked dead (-errno) */ |
| 288 | |
| 289 | /* callback promise management */ |
| 290 | struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */ |
| 291 | struct delayed_work cb_updater; /* callback updater */ |
| 292 | struct delayed_work cb_break_work; /* collected break dispatcher */ |
| 293 | wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */ |
| 294 | spinlock_t cb_lock; /* access lock */ |
| 295 | struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */ |
| 296 | atomic_t cb_break_n; /* number of pending breaks */ |
| 297 | u8 cb_break_head; /* head of callback breaking ring */ |
| 298 | u8 cb_break_tail; /* tail of callback breaking ring */ |
| 299 | }; |
| 300 | |
| 301 | /* |
| 302 | * AFS volume access record |
| 303 | */ |
| 304 | struct afs_volume { |
| 305 | atomic_t usage; |
| 306 | struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */ |
| 307 | struct afs_vlocation *vlocation; /* volume location */ |
David Howells | 9b3f26c | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 308 | #ifdef CONFIG_AFS_FSCACHE |
| 309 | struct fscache_cookie *cache; /* caching cookie */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 310 | #endif |
| 311 | afs_volid_t vid; /* volume ID */ |
| 312 | afs_voltype_t type; /* type of volume */ |
| 313 | char type_force; /* force volume type (suppress R/O -> R/W) */ |
| 314 | unsigned short nservers; /* number of server slots filled */ |
| 315 | unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */ |
| 316 | struct afs_server *servers[8]; /* servers on which volume resides (ordered) */ |
| 317 | struct rw_semaphore server_sem; /* lock for accessing current server */ |
Jens Axboe | e1da022 | 2010-04-22 11:58:18 +0200 | [diff] [blame] | 318 | struct backing_dev_info bdi; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 319 | }; |
| 320 | |
| 321 | /* |
| 322 | * vnode catalogue entry |
| 323 | */ |
| 324 | struct afs_cache_vnode { |
| 325 | afs_vnodeid_t vnode_id; /* vnode ID */ |
| 326 | unsigned vnode_unique; /* vnode ID uniquifier */ |
| 327 | afs_dataversion_t data_version; /* data version */ |
| 328 | }; |
| 329 | |
| 330 | /* |
| 331 | * AFS inode private data |
| 332 | */ |
| 333 | struct afs_vnode { |
| 334 | struct inode vfs_inode; /* the VFS's inode record */ |
| 335 | |
| 336 | struct afs_volume *volume; /* volume on which vnode resides */ |
| 337 | struct afs_server *server; /* server currently supplying this file */ |
| 338 | struct afs_fid fid; /* the file identifier for this inode */ |
| 339 | struct afs_file_status status; /* AFS status info for this file */ |
David Howells | 9b3f26c | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 340 | #ifdef CONFIG_AFS_FSCACHE |
| 341 | struct fscache_cookie *cache; /* caching cookie */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 342 | #endif |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 343 | struct afs_permits *permits; /* cache of permits so far obtained */ |
| 344 | struct mutex permits_lock; /* lock for altering permits list */ |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 345 | struct mutex validate_lock; /* lock for validating this vnode */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 346 | wait_queue_head_t update_waitq; /* status fetch waitqueue */ |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 347 | int update_cnt; /* number of outstanding ops that will update the |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 348 | * status */ |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 349 | spinlock_t writeback_lock; /* lock for writebacks */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 350 | spinlock_t lock; /* waitqueue/flags lock */ |
| 351 | unsigned long flags; |
| 352 | #define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */ |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 353 | #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 354 | #define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */ |
| 355 | #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ |
| 356 | #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ |
| 357 | #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ |
David Howells | e8d6c55 | 2007-07-15 23:40:12 -0700 | [diff] [blame] | 358 | #define AFS_VNODE_LOCKING 6 /* set if waiting for lock on vnode */ |
| 359 | #define AFS_VNODE_READLOCKED 7 /* set if vnode is read-locked on the server */ |
| 360 | #define AFS_VNODE_WRITELOCKED 8 /* set if vnode is write-locked on the server */ |
| 361 | #define AFS_VNODE_UNLOCKING 9 /* set if vnode is being unlocked on the server */ |
wanglei | bec5eb6 | 2010-08-11 09:38:04 +0100 | [diff] [blame] | 362 | #define AFS_VNODE_AUTOCELL 10 /* set if Vnode is an auto mount point */ |
| 363 | #define AFS_VNODE_PSEUDODIR 11 /* set if Vnode is a pseudo directory */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 364 | |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 365 | long acl_order; /* ACL check count (callback break count) */ |
| 366 | |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 367 | struct list_head writebacks; /* alterations in pagecache that need writing */ |
David Howells | e8d6c55 | 2007-07-15 23:40:12 -0700 | [diff] [blame] | 368 | struct list_head pending_locks; /* locks waiting to be granted */ |
| 369 | struct list_head granted_locks; /* locks granted on this file */ |
| 370 | struct delayed_work lock_work; /* work to be done in locking */ |
| 371 | struct key *unlock_key; /* key to be used in unlocking */ |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 372 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 373 | /* outstanding callback notification on this file */ |
| 374 | struct rb_node server_rb; /* link in server->fs_vnodes */ |
| 375 | struct rb_node cb_promise; /* link in server->cb_promises */ |
| 376 | struct work_struct cb_broken_work; /* work to be done on callback break */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 377 | time_t cb_expires; /* time at which callback expires */ |
| 378 | time_t cb_expires_at; /* time used to order cb_promise */ |
| 379 | unsigned cb_version; /* callback version */ |
| 380 | unsigned cb_expiry; /* callback expiry time */ |
| 381 | afs_callback_type_t cb_type; /* type of callback */ |
| 382 | bool cb_promised; /* true if promise still holds */ |
| 383 | }; |
| 384 | |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 385 | /* |
| 386 | * cached security record for one user's attempt to access a vnode |
| 387 | */ |
| 388 | struct afs_permit { |
| 389 | struct key *key; /* RxRPC ticket holding a security context */ |
| 390 | afs_access_t access_mask; /* access mask for this key */ |
| 391 | }; |
| 392 | |
| 393 | /* |
| 394 | * cache of security records from attempts to access a vnode |
| 395 | */ |
| 396 | struct afs_permits { |
| 397 | struct rcu_head rcu; /* disposal procedure */ |
| 398 | int count; /* number of records */ |
| 399 | struct afs_permit permits[0]; /* the permits so far examined */ |
| 400 | }; |
| 401 | |
David Howells | b908fe6 | 2007-04-26 15:58:17 -0700 | [diff] [blame] | 402 | /* |
| 403 | * record of one of a system's set of network interfaces |
| 404 | */ |
| 405 | struct afs_interface { |
David Howells | b908fe6 | 2007-04-26 15:58:17 -0700 | [diff] [blame] | 406 | struct in_addr address; /* IPv4 address bound to interface */ |
| 407 | struct in_addr netmask; /* netmask applied to address */ |
| 408 | unsigned mtu; /* MTU of interface */ |
| 409 | }; |
| 410 | |
| 411 | /* |
| 412 | * UUID definition [internet draft] |
| 413 | * - the timestamp is a 60-bit value, split 32/16/12, and goes in 100ns |
| 414 | * increments since midnight 15th October 1582 |
| 415 | * - add AFS_UUID_TO_UNIX_TIME to convert unix time in 100ns units to UUID |
| 416 | * time |
| 417 | * - the clock sequence is a 14-bit counter to avoid duplicate times |
| 418 | */ |
| 419 | struct afs_uuid { |
| 420 | u32 time_low; /* low part of timestamp */ |
| 421 | u16 time_mid; /* mid part of timestamp */ |
| 422 | u16 time_hi_and_version; /* high part of timestamp and version */ |
David Howells | b1bdb69 | 2007-04-27 15:28:45 -0700 | [diff] [blame] | 423 | #define AFS_UUID_TO_UNIX_TIME 0x01b21dd213814000ULL |
David Howells | b908fe6 | 2007-04-26 15:58:17 -0700 | [diff] [blame] | 424 | #define AFS_UUID_TIMEHI_MASK 0x0fff |
| 425 | #define AFS_UUID_VERSION_TIME 0x1000 /* time-based UUID */ |
| 426 | #define AFS_UUID_VERSION_NAME 0x3000 /* name-based UUID */ |
| 427 | #define AFS_UUID_VERSION_RANDOM 0x4000 /* (pseudo-)random generated UUID */ |
| 428 | u8 clock_seq_hi_and_reserved; /* clock seq hi and variant */ |
| 429 | #define AFS_UUID_CLOCKHI_MASK 0x3f |
| 430 | #define AFS_UUID_VARIANT_STD 0x80 |
| 431 | u8 clock_seq_low; /* clock seq low */ |
| 432 | u8 node[6]; /* spatially unique node ID (MAC addr) */ |
| 433 | }; |
| 434 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 435 | /*****************************************************************************/ |
| 436 | /* |
David Howells | 9b3f26c | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 437 | * cache.c |
| 438 | */ |
| 439 | #ifdef CONFIG_AFS_FSCACHE |
| 440 | extern struct fscache_netfs afs_cache_netfs; |
| 441 | extern struct fscache_cookie_def afs_cell_cache_index_def; |
| 442 | extern struct fscache_cookie_def afs_vlocation_cache_index_def; |
| 443 | extern struct fscache_cookie_def afs_volume_cache_index_def; |
| 444 | extern struct fscache_cookie_def afs_vnode_cache_index_def; |
| 445 | #else |
| 446 | #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) |
| 447 | #define afs_vlocation_cache_index_def (*(struct fscache_cookie_def *) NULL) |
| 448 | #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) |
| 449 | #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) |
| 450 | #endif |
| 451 | |
| 452 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 453 | * callback.c |
| 454 | */ |
| 455 | extern void afs_init_callback_state(struct afs_server *); |
| 456 | extern void afs_broken_callback_work(struct work_struct *); |
| 457 | extern void afs_break_callbacks(struct afs_server *, size_t, |
| 458 | struct afs_callback[]); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 459 | extern void afs_discard_callback_on_delete(struct afs_vnode *); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 460 | extern void afs_give_up_callback(struct afs_vnode *); |
| 461 | extern void afs_dispatch_give_up_callbacks(struct work_struct *); |
| 462 | extern void afs_flush_callback_breaks(struct afs_server *); |
| 463 | extern int __init afs_callback_update_init(void); |
David Howells | fbb3fcb | 2007-05-03 03:12:46 -0700 | [diff] [blame] | 464 | extern void afs_callback_update_kill(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | |
| 466 | /* |
| 467 | * cell.c |
| 468 | */ |
| 469 | extern struct rw_semaphore afs_proc_cells_sem; |
| 470 | extern struct list_head afs_proc_cells; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 472 | #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0) |
| 473 | extern int afs_cell_init(char *); |
wanglei | bec5eb6 | 2010-08-11 09:38:04 +0100 | [diff] [blame] | 474 | extern struct afs_cell *afs_cell_create(const char *, unsigned, char *, bool); |
| 475 | extern struct afs_cell *afs_cell_lookup(const char *, unsigned, bool); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 476 | extern struct afs_cell *afs_grab_cell(struct afs_cell *); |
| 477 | extern void afs_put_cell(struct afs_cell *); |
| 478 | extern void afs_cell_purge(void); |
| 479 | |
| 480 | /* |
| 481 | * cmservice.c |
| 482 | */ |
| 483 | extern bool afs_cm_incoming_call(struct afs_call *); |
| 484 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | /* |
| 486 | * dir.c |
| 487 | */ |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 488 | extern const struct inode_operations afs_dir_inode_operations; |
Al Viro | d61dcce | 2011-01-12 20:04:20 -0500 | [diff] [blame] | 489 | extern const struct dentry_operations afs_fs_dentry_operations; |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 490 | extern const struct file_operations afs_dir_file_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | |
| 492 | /* |
| 493 | * file.c |
| 494 | */ |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 495 | extern const struct address_space_operations afs_fs_aops; |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 496 | extern const struct inode_operations afs_file_inode_operations; |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 497 | extern const struct file_operations afs_file_operations; |
| 498 | |
| 499 | extern int afs_open(struct inode *, struct file *); |
| 500 | extern int afs_release(struct inode *, struct file *); |
Al Viro | f6d335c | 2010-05-21 15:27:09 +0100 | [diff] [blame] | 501 | extern int afs_page_filler(void *, struct page *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | /* |
David Howells | e8d6c55 | 2007-07-15 23:40:12 -0700 | [diff] [blame] | 504 | * flock.c |
| 505 | */ |
| 506 | extern void __exit afs_kill_lock_manager(void); |
| 507 | extern void afs_lock_work(struct work_struct *); |
| 508 | extern void afs_lock_may_be_available(struct afs_vnode *); |
| 509 | extern int afs_lock(struct file *, int, struct file_lock *); |
| 510 | extern int afs_flock(struct file *, int, struct file_lock *); |
| 511 | |
| 512 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 513 | * fsclient.c |
| 514 | */ |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 515 | extern int afs_fs_fetch_file_status(struct afs_server *, struct key *, |
| 516 | struct afs_vnode *, struct afs_volsync *, |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 517 | const struct afs_wait_mode *); |
| 518 | extern int afs_fs_give_up_callbacks(struct afs_server *, |
| 519 | const struct afs_wait_mode *); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 520 | extern int afs_fs_fetch_data(struct afs_server *, struct key *, |
| 521 | struct afs_vnode *, off_t, size_t, struct page *, |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 522 | const struct afs_wait_mode *); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 523 | extern int afs_fs_create(struct afs_server *, struct key *, |
| 524 | struct afs_vnode *, const char *, umode_t, |
| 525 | struct afs_fid *, struct afs_file_status *, |
| 526 | struct afs_callback *, |
| 527 | const struct afs_wait_mode *); |
| 528 | extern int afs_fs_remove(struct afs_server *, struct key *, |
| 529 | struct afs_vnode *, const char *, bool, |
| 530 | const struct afs_wait_mode *); |
| 531 | extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *, |
| 532 | struct afs_vnode *, const char *, |
| 533 | const struct afs_wait_mode *); |
| 534 | extern int afs_fs_symlink(struct afs_server *, struct key *, |
| 535 | struct afs_vnode *, const char *, const char *, |
| 536 | struct afs_fid *, struct afs_file_status *, |
| 537 | const struct afs_wait_mode *); |
| 538 | extern int afs_fs_rename(struct afs_server *, struct key *, |
| 539 | struct afs_vnode *, const char *, |
| 540 | struct afs_vnode *, const char *, |
| 541 | const struct afs_wait_mode *); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 542 | extern int afs_fs_store_data(struct afs_server *, struct afs_writeback *, |
| 543 | pgoff_t, pgoff_t, unsigned, unsigned, |
| 544 | const struct afs_wait_mode *); |
| 545 | extern int afs_fs_setattr(struct afs_server *, struct key *, |
| 546 | struct afs_vnode *, struct iattr *, |
| 547 | const struct afs_wait_mode *); |
David Howells | 45222b9 | 2007-05-10 22:22:20 -0700 | [diff] [blame] | 548 | extern int afs_fs_get_volume_status(struct afs_server *, struct key *, |
| 549 | struct afs_vnode *, |
| 550 | struct afs_volume_status *, |
| 551 | const struct afs_wait_mode *); |
David Howells | e8d6c55 | 2007-07-15 23:40:12 -0700 | [diff] [blame] | 552 | extern int afs_fs_set_lock(struct afs_server *, struct key *, |
| 553 | struct afs_vnode *, afs_lock_type_t, |
| 554 | const struct afs_wait_mode *); |
| 555 | extern int afs_fs_extend_lock(struct afs_server *, struct key *, |
| 556 | struct afs_vnode *, |
| 557 | const struct afs_wait_mode *); |
| 558 | extern int afs_fs_release_lock(struct afs_server *, struct key *, |
| 559 | struct afs_vnode *, |
| 560 | const struct afs_wait_mode *); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 561 | |
| 562 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | * inode.c |
| 564 | */ |
wanglei | bec5eb6 | 2010-08-11 09:38:04 +0100 | [diff] [blame] | 565 | extern struct inode *afs_iget_autocell(struct inode *, const char *, int, |
| 566 | struct key *); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 567 | extern struct inode *afs_iget(struct super_block *, struct key *, |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 568 | struct afs_fid *, struct afs_file_status *, |
| 569 | struct afs_callback *); |
David Howells | 416351f | 2007-05-09 02:33:45 -0700 | [diff] [blame] | 570 | extern void afs_zap_data(struct afs_vnode *); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 571 | extern int afs_validate(struct afs_vnode *, struct key *); |
David Howells | 416351f | 2007-05-09 02:33:45 -0700 | [diff] [blame] | 572 | extern int afs_getattr(struct vfsmount *, struct dentry *, struct kstat *); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 573 | extern int afs_setattr(struct dentry *, struct iattr *); |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 574 | extern void afs_evict_inode(struct inode *); |
wanglei | bec5eb6 | 2010-08-11 09:38:04 +0100 | [diff] [blame] | 575 | extern int afs_drop_inode(struct inode *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
| 577 | /* |
| 578 | * main.c |
| 579 | */ |
Tejun Heo | 0ad53ee | 2011-01-14 15:56:37 +0000 | [diff] [blame] | 580 | extern struct workqueue_struct *afs_wq; |
David Howells | b908fe6 | 2007-04-26 15:58:17 -0700 | [diff] [blame] | 581 | extern struct afs_uuid afs_uuid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | |
| 583 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 584 | * misc.c |
| 585 | */ |
| 586 | extern int afs_abort_to_error(u32); |
| 587 | |
| 588 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | * mntpt.c |
| 590 | */ |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 591 | extern const struct inode_operations afs_mntpt_inode_operations; |
wanglei | bec5eb6 | 2010-08-11 09:38:04 +0100 | [diff] [blame] | 592 | extern const struct inode_operations afs_autocell_inode_operations; |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 593 | extern const struct file_operations afs_mntpt_file_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | |
David Howells | d18610b | 2011-01-14 19:04:05 +0000 | [diff] [blame] | 595 | extern struct vfsmount *afs_d_automount(struct path *); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 596 | extern int afs_mntpt_check_symlink(struct afs_vnode *, struct key *); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 597 | extern void afs_mntpt_kill_timer(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | |
| 599 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | * proc.c |
| 601 | */ |
| 602 | extern int afs_proc_init(void); |
| 603 | extern void afs_proc_cleanup(void); |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 604 | extern int afs_proc_cell_setup(struct afs_cell *); |
| 605 | extern void afs_proc_cell_remove(struct afs_cell *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 607 | /* |
| 608 | * rxrpc.c |
| 609 | */ |
| 610 | extern int afs_open_socket(void); |
| 611 | extern void afs_close_socket(void); |
David Howells | 372ee16 | 2016-08-03 14:11:40 +0100 | [diff] [blame] | 612 | extern void afs_data_consumed(struct afs_call *, struct sk_buff *); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 613 | extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t, |
| 614 | const struct afs_wait_mode *); |
| 615 | extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *, |
| 616 | size_t, size_t); |
| 617 | extern void afs_flat_call_destructor(struct afs_call *); |
David Howells | 372ee16 | 2016-08-03 14:11:40 +0100 | [diff] [blame] | 618 | extern int afs_transfer_reply(struct afs_call *, struct sk_buff *, bool); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 619 | extern void afs_send_empty_reply(struct afs_call *); |
David Howells | b908fe6 | 2007-04-26 15:58:17 -0700 | [diff] [blame] | 620 | extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 621 | extern int afs_extract_data(struct afs_call *, struct sk_buff *, bool, void *, |
| 622 | size_t); |
| 623 | |
David Howells | 372ee16 | 2016-08-03 14:11:40 +0100 | [diff] [blame] | 624 | static inline int afs_data_complete(struct afs_call *call, struct sk_buff *skb, |
| 625 | bool last) |
| 626 | { |
| 627 | if (skb->len > 0) |
| 628 | return -EBADMSG; |
| 629 | afs_data_consumed(call, skb); |
| 630 | if (!last) |
| 631 | return -EAGAIN; |
| 632 | return 0; |
| 633 | } |
| 634 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 635 | /* |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 636 | * security.c |
| 637 | */ |
| 638 | extern void afs_clear_permits(struct afs_vnode *); |
| 639 | extern void afs_cache_permit(struct afs_vnode *, struct key *, long); |
David Howells | 416351f | 2007-05-09 02:33:45 -0700 | [diff] [blame] | 640 | extern void afs_zap_permits(struct rcu_head *); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 641 | extern struct key *afs_request_key(struct afs_cell *); |
Al Viro | 10556cb | 2011-06-20 19:28:19 -0400 | [diff] [blame] | 642 | extern int afs_permission(struct inode *, int); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 643 | |
| 644 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 645 | * server.c |
| 646 | */ |
| 647 | extern spinlock_t afs_server_peer_lock; |
| 648 | |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 649 | #define afs_get_server(S) \ |
| 650 | do { \ |
| 651 | _debug("GET SERVER %d", atomic_read(&(S)->usage)); \ |
| 652 | atomic_inc(&(S)->usage); \ |
| 653 | } while(0) |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 654 | |
| 655 | extern struct afs_server *afs_lookup_server(struct afs_cell *, |
| 656 | const struct in_addr *); |
| 657 | extern struct afs_server *afs_find_server(const struct in_addr *); |
| 658 | extern void afs_put_server(struct afs_server *); |
| 659 | extern void __exit afs_purge_servers(void); |
| 660 | |
| 661 | /* |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 662 | * super.c |
| 663 | */ |
| 664 | extern int afs_fs_init(void); |
| 665 | extern void afs_fs_exit(void); |
| 666 | |
| 667 | /* |
David Howells | b908fe6 | 2007-04-26 15:58:17 -0700 | [diff] [blame] | 668 | * use-rtnetlink.c |
| 669 | */ |
| 670 | extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); |
David Howells | ec9c948 | 2007-05-03 03:29:41 -0700 | [diff] [blame] | 671 | extern int afs_get_MAC_address(u8 *, size_t); |
David Howells | b908fe6 | 2007-04-26 15:58:17 -0700 | [diff] [blame] | 672 | |
| 673 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 674 | * vlclient.c |
| 675 | */ |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 676 | extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *, |
| 677 | const char *, struct afs_cache_vlocation *, |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 678 | const struct afs_wait_mode *); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 679 | extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *, |
| 680 | afs_volid_t, afs_voltype_t, |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 681 | struct afs_cache_vlocation *, |
| 682 | const struct afs_wait_mode *); |
| 683 | |
| 684 | /* |
| 685 | * vlocation.c |
| 686 | */ |
| 687 | #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0) |
| 688 | |
| 689 | extern int __init afs_vlocation_update_init(void); |
| 690 | extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *, |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 691 | struct key *, |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 692 | const char *, size_t); |
| 693 | extern void afs_put_vlocation(struct afs_vlocation *); |
David Howells | fbb3fcb | 2007-05-03 03:12:46 -0700 | [diff] [blame] | 694 | extern void afs_vlocation_purge(void); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 695 | |
| 696 | /* |
| 697 | * vnode.c |
| 698 | */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 699 | static inline struct afs_vnode *AFS_FS_I(struct inode *inode) |
| 700 | { |
| 701 | return container_of(inode, struct afs_vnode, vfs_inode); |
| 702 | } |
| 703 | |
| 704 | static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) |
| 705 | { |
| 706 | return &vnode->vfs_inode; |
| 707 | } |
| 708 | |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 709 | extern void afs_vnode_finalise_status_update(struct afs_vnode *, |
| 710 | struct afs_server *); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 711 | extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *, |
| 712 | struct key *); |
| 713 | extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *, |
| 714 | off_t, size_t, struct page *); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 715 | extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *, |
| 716 | umode_t, struct afs_fid *, struct afs_file_status *, |
| 717 | struct afs_callback *, struct afs_server **); |
| 718 | extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *, |
| 719 | bool); |
| 720 | extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *, |
| 721 | const char *); |
| 722 | extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *, |
| 723 | const char *, struct afs_fid *, |
| 724 | struct afs_file_status *, struct afs_server **); |
| 725 | extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *, |
| 726 | struct key *, const char *, const char *); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 727 | extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t, |
| 728 | unsigned, unsigned); |
| 729 | extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *); |
David Howells | 45222b9 | 2007-05-10 22:22:20 -0700 | [diff] [blame] | 730 | extern int afs_vnode_get_volume_status(struct afs_vnode *, struct key *, |
| 731 | struct afs_volume_status *); |
David Howells | e8d6c55 | 2007-07-15 23:40:12 -0700 | [diff] [blame] | 732 | extern int afs_vnode_set_lock(struct afs_vnode *, struct key *, |
| 733 | afs_lock_type_t); |
| 734 | extern int afs_vnode_extend_lock(struct afs_vnode *, struct key *); |
| 735 | extern int afs_vnode_release_lock(struct afs_vnode *, struct key *); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 736 | |
| 737 | /* |
| 738 | * volume.c |
| 739 | */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 740 | #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0) |
| 741 | |
| 742 | extern void afs_put_volume(struct afs_volume *); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 743 | extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 744 | extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *); |
| 745 | extern int afs_volume_release_fileserver(struct afs_vnode *, |
| 746 | struct afs_server *, int); |
| 747 | |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 748 | /* |
| 749 | * write.c |
| 750 | */ |
| 751 | extern int afs_set_page_dirty(struct page *); |
| 752 | extern void afs_put_writeback(struct afs_writeback *); |
Nick Piggin | 15b4650 | 2008-10-15 22:04:32 -0700 | [diff] [blame] | 753 | extern int afs_write_begin(struct file *file, struct address_space *mapping, |
| 754 | loff_t pos, unsigned len, unsigned flags, |
| 755 | struct page **pagep, void **fsdata); |
| 756 | extern int afs_write_end(struct file *file, struct address_space *mapping, |
| 757 | loff_t pos, unsigned len, unsigned copied, |
| 758 | struct page *page, void *fsdata); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 759 | extern int afs_writepage(struct page *, struct writeback_control *); |
| 760 | extern int afs_writepages(struct address_space *, struct writeback_control *); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 761 | extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); |
Al Viro | 50b5551 | 2014-04-03 14:13:46 -0400 | [diff] [blame] | 762 | extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 763 | extern int afs_writeback_all(struct afs_vnode *); |
Josef Bacik | 02c24a8 | 2011-07-16 20:44:56 -0400 | [diff] [blame] | 764 | extern int afs_fsync(struct file *, loff_t, loff_t, int); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 765 | |
| 766 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 767 | /*****************************************************************************/ |
| 768 | /* |
| 769 | * debug tracing |
| 770 | */ |
| 771 | extern unsigned afs_debug; |
| 772 | |
| 773 | #define dbgprintk(FMT,...) \ |
Sven Schnelle | ad16df8 | 2008-04-03 10:44:01 +0100 | [diff] [blame] | 774 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 775 | |
Harvey Harrison | 530b641 | 2008-04-30 00:55:09 -0700 | [diff] [blame] | 776 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| 777 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 778 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
| 779 | |
| 780 | |
| 781 | #if defined(__KDEBUG) |
| 782 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) |
| 783 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) |
| 784 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) |
| 785 | |
| 786 | #elif defined(CONFIG_AFS_DEBUG) |
| 787 | #define AFS_DEBUG_KENTER 0x01 |
| 788 | #define AFS_DEBUG_KLEAVE 0x02 |
| 789 | #define AFS_DEBUG_KDEBUG 0x04 |
| 790 | |
| 791 | #define _enter(FMT,...) \ |
| 792 | do { \ |
| 793 | if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ |
| 794 | kenter(FMT,##__VA_ARGS__); \ |
| 795 | } while (0) |
| 796 | |
| 797 | #define _leave(FMT,...) \ |
| 798 | do { \ |
| 799 | if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ |
| 800 | kleave(FMT,##__VA_ARGS__); \ |
| 801 | } while (0) |
| 802 | |
| 803 | #define _debug(FMT,...) \ |
| 804 | do { \ |
| 805 | if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ |
| 806 | kdebug(FMT,##__VA_ARGS__); \ |
| 807 | } while (0) |
| 808 | |
| 809 | #else |
David Howells | 12fdff3 | 2010-08-12 16:54:57 +0100 | [diff] [blame] | 810 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| 811 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
| 812 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 813 | #endif |
| 814 | |
| 815 | /* |
| 816 | * debug assertion checking |
| 817 | */ |
| 818 | #if 1 // defined(__KDEBUGALL) |
| 819 | |
| 820 | #define ASSERT(X) \ |
| 821 | do { \ |
| 822 | if (unlikely(!(X))) { \ |
| 823 | printk(KERN_ERR "\n"); \ |
| 824 | printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| 825 | BUG(); \ |
| 826 | } \ |
| 827 | } while(0) |
| 828 | |
| 829 | #define ASSERTCMP(X, OP, Y) \ |
| 830 | do { \ |
| 831 | if (unlikely(!((X) OP (Y)))) { \ |
| 832 | printk(KERN_ERR "\n"); \ |
| 833 | printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| 834 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ |
| 835 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 836 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ |
| 837 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 838 | BUG(); \ |
| 839 | } \ |
| 840 | } while(0) |
| 841 | |
David Howells | 416351f | 2007-05-09 02:33:45 -0700 | [diff] [blame] | 842 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
| 843 | do { \ |
| 844 | if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ |
| 845 | printk(KERN_ERR "\n"); \ |
| 846 | printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| 847 | printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ |
| 848 | (unsigned long)(L), (unsigned long)(N), \ |
| 849 | (unsigned long)(H)); \ |
| 850 | printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ |
| 851 | (unsigned long)(L), (unsigned long)(N), \ |
| 852 | (unsigned long)(H)); \ |
| 853 | BUG(); \ |
| 854 | } \ |
| 855 | } while(0) |
| 856 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 857 | #define ASSERTIF(C, X) \ |
| 858 | do { \ |
| 859 | if (unlikely((C) && !(X))) { \ |
| 860 | printk(KERN_ERR "\n"); \ |
| 861 | printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| 862 | BUG(); \ |
| 863 | } \ |
| 864 | } while(0) |
| 865 | |
| 866 | #define ASSERTIFCMP(C, X, OP, Y) \ |
| 867 | do { \ |
| 868 | if (unlikely((C) && !((X) OP (Y)))) { \ |
| 869 | printk(KERN_ERR "\n"); \ |
| 870 | printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| 871 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ |
| 872 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 873 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ |
| 874 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 875 | BUG(); \ |
| 876 | } \ |
| 877 | } while(0) |
| 878 | |
| 879 | #else |
| 880 | |
| 881 | #define ASSERT(X) \ |
| 882 | do { \ |
| 883 | } while(0) |
| 884 | |
| 885 | #define ASSERTCMP(X, OP, Y) \ |
| 886 | do { \ |
| 887 | } while(0) |
| 888 | |
David Howells | 416351f | 2007-05-09 02:33:45 -0700 | [diff] [blame] | 889 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
| 890 | do { \ |
| 891 | } while(0) |
| 892 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 893 | #define ASSERTIF(C, X) \ |
| 894 | do { \ |
| 895 | } while(0) |
| 896 | |
| 897 | #define ASSERTIFCMP(C, X, OP, Y) \ |
| 898 | do { \ |
| 899 | } while(0) |
| 900 | |
| 901 | #endif /* __KDEBUGALL */ |