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/rxrpc.h> |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 17 | #include <linux/key.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 18 | #include <linux/workqueue.h> |
Andrew Morton | 00c541e | 2007-05-31 00:40:52 -0700 | [diff] [blame] | 19 | #include <linux/sched.h> |
Christoph Hellwig | 80e50be | 2009-10-01 15:44:27 -0700 | [diff] [blame] | 20 | #include <linux/fscache.h> |
Jens Axboe | e1da022 | 2010-04-22 11:58:18 +0200 | [diff] [blame] | 21 | #include <linux/backing-dev.h> |
David Howells | ff54877 | 2017-02-10 16:34:07 +0000 | [diff] [blame] | 22 | #include <linux/uuid.h> |
David Howells | 8324f0b | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 23 | #include <net/af_rxrpc.h> |
Andrew Morton | 00c541e | 2007-05-31 00:40:52 -0700 | [diff] [blame] | 24 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 25 | #include "afs.h" |
| 26 | #include "afs_vl.h" |
| 27 | |
| 28 | #define AFS_CELL_MAX_ADDRS 15 |
| 29 | |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 30 | struct pagevec; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 31 | struct afs_call; |
| 32 | |
| 33 | typedef enum { |
| 34 | AFS_VL_NEW, /* new, uninitialised record */ |
| 35 | AFS_VL_CREATING, /* creating record */ |
| 36 | AFS_VL_VALID, /* record is pending */ |
| 37 | AFS_VL_NO_VOLUME, /* no such volume available */ |
| 38 | AFS_VL_UPDATING, /* update in progress */ |
| 39 | AFS_VL_VOLUME_DELETED, /* volume was deleted */ |
| 40 | AFS_VL_UNCERTAIN, /* uncertain state (update failed) */ |
| 41 | } __attribute__((packed)) afs_vlocation_state_t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 43 | struct afs_mount_params { |
| 44 | bool rwpath; /* T if the parent should be considered R/W */ |
| 45 | bool force; /* T to force cell type */ |
wanglei | bec5eb6 | 2010-08-11 09:38:04 +0100 | [diff] [blame] | 46 | bool autocell; /* T if set auto mount operation */ |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 47 | afs_voltype_t type; /* type of volume requested */ |
| 48 | int volnamesz; /* size of volume name */ |
| 49 | const char *volname; /* name of volume to mount */ |
| 50 | struct afs_cell *cell; /* cell in which to find volume */ |
| 51 | struct afs_volume *volume; /* volume record */ |
| 52 | struct key *key; /* key to use for secure mounting */ |
| 53 | }; |
| 54 | |
David Howells | 8e8d7f1 | 2017-01-05 10:38:34 +0000 | [diff] [blame] | 55 | enum afs_call_state { |
| 56 | AFS_CALL_REQUESTING, /* request is being sent for outgoing call */ |
| 57 | AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */ |
| 58 | AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */ |
| 59 | AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */ |
| 60 | AFS_CALL_REPLYING, /* replying to incoming call */ |
| 61 | AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */ |
| 62 | AFS_CALL_COMPLETE, /* Completed or failed */ |
| 63 | }; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 64 | /* |
| 65 | * a record of an in-progress RxRPC call |
| 66 | */ |
| 67 | struct afs_call { |
| 68 | const struct afs_call_type *type; /* type of call */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 69 | wait_queue_head_t waitq; /* processes awaiting completion */ |
David Howells | 341f741 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 70 | struct work_struct async_work; /* async I/O processor */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 71 | struct work_struct work; /* actual work processor */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 72 | struct rxrpc_call *rxcall; /* RxRPC call handle */ |
| 73 | struct key *key; /* security for this call */ |
| 74 | struct afs_server *server; /* server affected by incoming CM call */ |
| 75 | void *request; /* request data (first part) */ |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 76 | struct address_space *mapping; /* page set */ |
| 77 | struct afs_writeback *wb; /* writeback being performed */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 78 | void *buffer; /* reply receive buffer */ |
| 79 | void *reply; /* reply buffer (first part) */ |
| 80 | void *reply2; /* reply buffer (second part) */ |
| 81 | void *reply3; /* reply buffer (third part) */ |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 82 | void *reply4; /* reply buffer (fourth part) */ |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 83 | pgoff_t first; /* first page in mapping to deal with */ |
| 84 | pgoff_t last; /* last page in mapping to deal with */ |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 85 | size_t offset; /* offset into received data store */ |
David Howells | 341f741 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 86 | atomic_t usage; |
David Howells | 8e8d7f1 | 2017-01-05 10:38:34 +0000 | [diff] [blame] | 87 | enum afs_call_state state; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 88 | int error; /* error code */ |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 89 | u32 abort_code; /* Remote abort ID or 0 */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 90 | unsigned request_size; /* size of request data */ |
| 91 | unsigned reply_max; /* maximum size of reply */ |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 92 | unsigned first_offset; /* offset into mapping[first] */ |
Marc Dionne | bcd8927 | 2017-03-16 16:27:44 +0000 | [diff] [blame] | 93 | union { |
| 94 | unsigned last_to; /* amount of mapping[last] */ |
| 95 | unsigned count2; /* count used in unmarshalling */ |
| 96 | }; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 97 | unsigned char unmarshall; /* unmarshalling phase */ |
| 98 | bool incoming; /* T if incoming call */ |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 99 | bool send_pages; /* T if data from mapping should be sent */ |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 100 | bool need_attention; /* T if RxRPC poked us */ |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 101 | bool async; /* T if asynchronous */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 102 | u16 service_id; /* RxRPC service ID to call */ |
| 103 | __be16 port; /* target UDP port */ |
David Howells | 50a2c95 | 2016-10-13 08:27:10 +0100 | [diff] [blame] | 104 | u32 operation_ID; /* operation ID for an incoming call */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 105 | u32 count; /* count for use in unmarshalling */ |
| 106 | __be32 tmp; /* place to extract temporary data */ |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 107 | afs_dataversion_t store_version; /* updated version expected from store */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 108 | }; |
| 109 | |
| 110 | struct afs_call_type { |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 111 | const char *name; |
| 112 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 113 | /* deliver request or reply data to an call |
| 114 | * - returning an error will cause the call to be aborted |
| 115 | */ |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 116 | int (*deliver)(struct afs_call *call); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 117 | |
| 118 | /* map an abort code to an error number */ |
| 119 | int (*abort_to_error)(u32 abort_code); |
| 120 | |
| 121 | /* clean up a call */ |
| 122 | void (*destructor)(struct afs_call *call); |
David Howells | 341f741 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 123 | |
| 124 | /* Work function */ |
| 125 | void (*work)(struct work_struct *work); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 126 | }; |
| 127 | |
| 128 | /* |
David Howells | 196ee9c | 2017-01-05 10:38:34 +0000 | [diff] [blame] | 129 | * Record of an outstanding read operation on a vnode. |
| 130 | */ |
| 131 | struct afs_read { |
| 132 | loff_t pos; /* Where to start reading */ |
David Howells | e8e581a | 2017-03-16 16:27:44 +0000 | [diff] [blame^] | 133 | loff_t len; /* How much we're asking for */ |
David Howells | 196ee9c | 2017-01-05 10:38:34 +0000 | [diff] [blame] | 134 | loff_t actual_len; /* How much we're actually getting */ |
| 135 | atomic_t usage; |
| 136 | unsigned int remain; /* Amount remaining */ |
| 137 | unsigned int index; /* Which page we're reading into */ |
David Howells | 196ee9c | 2017-01-05 10:38:34 +0000 | [diff] [blame] | 138 | unsigned int nr_pages; |
| 139 | void (*page_done)(struct afs_call *, struct afs_read *); |
| 140 | struct page *pages[]; |
| 141 | }; |
| 142 | |
| 143 | /* |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 144 | * record of an outstanding writeback on a vnode |
| 145 | */ |
| 146 | struct afs_writeback { |
| 147 | struct list_head link; /* link in vnode->writebacks */ |
| 148 | struct work_struct writer; /* work item to perform the writeback */ |
| 149 | struct afs_vnode *vnode; /* vnode to which this write applies */ |
| 150 | struct key *key; /* owner of this write */ |
| 151 | wait_queue_head_t waitq; /* completion and ready wait queue */ |
| 152 | pgoff_t first; /* first page in batch */ |
| 153 | pgoff_t point; /* last page in current store op */ |
| 154 | pgoff_t last; /* last page in batch (inclusive) */ |
| 155 | unsigned offset_first; /* offset into first page of start of write */ |
| 156 | unsigned to_last; /* offset into last page of end of write */ |
| 157 | int num_conflicts; /* count of conflicting writes in list */ |
| 158 | int usage; |
| 159 | bool conflicts; /* T if has dependent conflicts */ |
| 160 | enum { |
| 161 | AFS_WBACK_SYNCING, /* synchronisation being performed */ |
| 162 | AFS_WBACK_PENDING, /* write pending */ |
| 163 | AFS_WBACK_CONFLICTING, /* conflicting writes posted */ |
| 164 | AFS_WBACK_WRITING, /* writing back */ |
| 165 | AFS_WBACK_COMPLETE /* the writeback record has been unlinked */ |
| 166 | } state __attribute__((packed)); |
| 167 | }; |
| 168 | |
| 169 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 170 | * AFS superblock private data |
| 171 | * - there's one superblock per volume |
| 172 | */ |
| 173 | struct afs_super_info { |
| 174 | struct afs_volume *volume; /* volume record */ |
| 175 | char rwparent; /* T if parent is R/W AFS volume */ |
| 176 | }; |
| 177 | |
| 178 | static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
| 179 | { |
| 180 | return sb->s_fs_info; |
| 181 | } |
| 182 | |
| 183 | extern struct file_system_type afs_fs_type; |
| 184 | |
| 185 | /* |
| 186 | * entry in the cached cell catalogue |
| 187 | */ |
| 188 | struct afs_cache_cell { |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 189 | char name[AFS_MAXCELLNAME]; /* cell name (padded with NULs) */ |
| 190 | struct in_addr vl_servers[15]; /* cached cell VL servers */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 191 | }; |
| 192 | |
| 193 | /* |
| 194 | * AFS cell record |
| 195 | */ |
| 196 | struct afs_cell { |
| 197 | atomic_t usage; |
| 198 | struct list_head link; /* main cell list link */ |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 199 | struct key *anonymous_key; /* anonymous user key for this cell */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 200 | struct list_head proc_link; /* /proc cell list link */ |
David Howells | 9b3f26c | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 201 | #ifdef CONFIG_AFS_FSCACHE |
| 202 | struct fscache_cookie *cache; /* caching cookie */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | #endif |
| 204 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 205 | /* server record management */ |
| 206 | rwlock_t servers_lock; /* active server list lock */ |
| 207 | struct list_head servers; /* active server list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 209 | /* volume location record management */ |
| 210 | struct rw_semaphore vl_sem; /* volume management serialisation semaphore */ |
| 211 | struct list_head vl_list; /* cell's active VL record list */ |
| 212 | spinlock_t vl_lock; /* vl_list lock */ |
| 213 | unsigned short vl_naddrs; /* number of VL servers in addr list */ |
| 214 | unsigned short vl_curr_svix; /* current server index */ |
| 215 | struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */ |
| 216 | |
| 217 | char name[0]; /* cell name - must go last */ |
| 218 | }; |
| 219 | |
| 220 | /* |
| 221 | * entry in the cached volume location catalogue |
| 222 | */ |
| 223 | struct afs_cache_vlocation { |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 224 | /* volume name (lowercase, padded with NULs) */ |
| 225 | uint8_t name[AFS_MAXVOLNAME + 1]; |
| 226 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 227 | uint8_t nservers; /* number of entries used in servers[] */ |
| 228 | uint8_t vidmask; /* voltype mask for vid[] */ |
| 229 | uint8_t srvtmask[8]; /* voltype masks for servers[] */ |
| 230 | #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ |
| 231 | #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ |
| 232 | #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ |
| 233 | |
| 234 | afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */ |
| 235 | struct in_addr servers[8]; /* fileserver addresses */ |
| 236 | time_t rtime; /* last retrieval time */ |
| 237 | }; |
| 238 | |
| 239 | /* |
| 240 | * volume -> vnode hash table entry |
| 241 | */ |
| 242 | struct afs_cache_vhash { |
| 243 | afs_voltype_t vtype; /* which volume variation */ |
| 244 | uint8_t hash_bucket; /* which hash bucket this represents */ |
| 245 | } __attribute__((packed)); |
| 246 | |
| 247 | /* |
| 248 | * AFS volume location record |
| 249 | */ |
| 250 | struct afs_vlocation { |
| 251 | atomic_t usage; |
| 252 | time_t time_of_death; /* time at which put reduced usage to 0 */ |
| 253 | struct list_head link; /* link in cell volume location list */ |
| 254 | struct list_head grave; /* link in master graveyard list */ |
| 255 | struct list_head update; /* link in master update list */ |
| 256 | struct afs_cell *cell; /* cell to which volume belongs */ |
David Howells | 9b3f26c | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 257 | #ifdef CONFIG_AFS_FSCACHE |
| 258 | struct fscache_cookie *cache; /* caching cookie */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 259 | #endif |
| 260 | struct afs_cache_vlocation vldb; /* volume information DB record */ |
| 261 | struct afs_volume *vols[3]; /* volume access record pointer (index by type) */ |
| 262 | wait_queue_head_t waitq; /* status change waitqueue */ |
| 263 | time_t update_at; /* time at which record should be updated */ |
David S. Miller | 39bf094 | 2007-04-26 20:39:14 -0700 | [diff] [blame] | 264 | spinlock_t lock; /* access lock */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 265 | afs_vlocation_state_t state; /* volume location state */ |
| 266 | unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */ |
| 267 | unsigned short upd_busy_cnt; /* EBUSY count during update */ |
| 268 | bool valid; /* T if valid */ |
| 269 | }; |
| 270 | |
| 271 | /* |
| 272 | * AFS fileserver record |
| 273 | */ |
| 274 | struct afs_server { |
| 275 | atomic_t usage; |
| 276 | time_t time_of_death; /* time at which put reduced usage to 0 */ |
| 277 | struct in_addr addr; /* server address */ |
| 278 | struct afs_cell *cell; /* cell in which server resides */ |
| 279 | struct list_head link; /* link in cell's server list */ |
| 280 | struct list_head grave; /* link in master graveyard list */ |
| 281 | struct rb_node master_rb; /* link in master by-addr tree */ |
| 282 | struct rw_semaphore sem; /* access lock */ |
| 283 | |
| 284 | /* file service access */ |
| 285 | struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */ |
| 286 | unsigned long fs_act_jif; /* time at which last activity occurred */ |
| 287 | unsigned long fs_dead_jif; /* time at which no longer to be considered dead */ |
| 288 | spinlock_t fs_lock; /* access lock */ |
| 289 | int fs_state; /* 0 or reason FS currently marked dead (-errno) */ |
| 290 | |
| 291 | /* callback promise management */ |
| 292 | struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */ |
| 293 | struct delayed_work cb_updater; /* callback updater */ |
| 294 | struct delayed_work cb_break_work; /* collected break dispatcher */ |
| 295 | wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */ |
| 296 | spinlock_t cb_lock; /* access lock */ |
| 297 | struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */ |
| 298 | atomic_t cb_break_n; /* number of pending breaks */ |
| 299 | u8 cb_break_head; /* head of callback breaking ring */ |
| 300 | u8 cb_break_tail; /* tail of callback breaking ring */ |
| 301 | }; |
| 302 | |
| 303 | /* |
| 304 | * AFS volume access record |
| 305 | */ |
| 306 | struct afs_volume { |
| 307 | atomic_t usage; |
| 308 | struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */ |
| 309 | struct afs_vlocation *vlocation; /* volume location */ |
David Howells | 9b3f26c | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 310 | #ifdef CONFIG_AFS_FSCACHE |
| 311 | struct fscache_cookie *cache; /* caching cookie */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 312 | #endif |
| 313 | afs_volid_t vid; /* volume ID */ |
| 314 | afs_voltype_t type; /* type of volume */ |
| 315 | char type_force; /* force volume type (suppress R/O -> R/W) */ |
| 316 | unsigned short nservers; /* number of server slots filled */ |
| 317 | unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */ |
| 318 | struct afs_server *servers[8]; /* servers on which volume resides (ordered) */ |
| 319 | struct rw_semaphore server_sem; /* lock for accessing current server */ |
Jens Axboe | e1da022 | 2010-04-22 11:58:18 +0200 | [diff] [blame] | 320 | struct backing_dev_info bdi; |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 321 | }; |
| 322 | |
| 323 | /* |
| 324 | * vnode catalogue entry |
| 325 | */ |
| 326 | struct afs_cache_vnode { |
| 327 | afs_vnodeid_t vnode_id; /* vnode ID */ |
| 328 | unsigned vnode_unique; /* vnode ID uniquifier */ |
| 329 | afs_dataversion_t data_version; /* data version */ |
| 330 | }; |
| 331 | |
| 332 | /* |
| 333 | * AFS inode private data |
| 334 | */ |
| 335 | struct afs_vnode { |
| 336 | struct inode vfs_inode; /* the VFS's inode record */ |
| 337 | |
| 338 | struct afs_volume *volume; /* volume on which vnode resides */ |
| 339 | struct afs_server *server; /* server currently supplying this file */ |
| 340 | struct afs_fid fid; /* the file identifier for this inode */ |
| 341 | struct afs_file_status status; /* AFS status info for this file */ |
David Howells | 9b3f26c | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 342 | #ifdef CONFIG_AFS_FSCACHE |
| 343 | struct fscache_cookie *cache; /* caching cookie */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 344 | #endif |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 345 | struct afs_permits *permits; /* cache of permits so far obtained */ |
| 346 | struct mutex permits_lock; /* lock for altering permits list */ |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 347 | struct mutex validate_lock; /* lock for validating this vnode */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 348 | wait_queue_head_t update_waitq; /* status fetch waitqueue */ |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 349 | int update_cnt; /* number of outstanding ops that will update the |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 350 | * status */ |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 351 | spinlock_t writeback_lock; /* lock for writebacks */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 352 | spinlock_t lock; /* waitqueue/flags lock */ |
| 353 | unsigned long flags; |
| 354 | #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] | 355 | #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 356 | #define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */ |
| 357 | #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ |
| 358 | #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ |
| 359 | #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ |
David Howells | e8d6c55 | 2007-07-15 23:40:12 -0700 | [diff] [blame] | 360 | #define AFS_VNODE_LOCKING 6 /* set if waiting for lock on vnode */ |
| 361 | #define AFS_VNODE_READLOCKED 7 /* set if vnode is read-locked on the server */ |
| 362 | #define AFS_VNODE_WRITELOCKED 8 /* set if vnode is write-locked on the server */ |
| 363 | #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] | 364 | #define AFS_VNODE_AUTOCELL 10 /* set if Vnode is an auto mount point */ |
| 365 | #define AFS_VNODE_PSEUDODIR 11 /* set if Vnode is a pseudo directory */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 366 | |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 367 | long acl_order; /* ACL check count (callback break count) */ |
| 368 | |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 369 | struct list_head writebacks; /* alterations in pagecache that need writing */ |
David Howells | e8d6c55 | 2007-07-15 23:40:12 -0700 | [diff] [blame] | 370 | struct list_head pending_locks; /* locks waiting to be granted */ |
| 371 | struct list_head granted_locks; /* locks granted on this file */ |
| 372 | struct delayed_work lock_work; /* work to be done in locking */ |
| 373 | struct key *unlock_key; /* key to be used in unlocking */ |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 374 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 375 | /* outstanding callback notification on this file */ |
| 376 | struct rb_node server_rb; /* link in server->fs_vnodes */ |
| 377 | struct rb_node cb_promise; /* link in server->cb_promises */ |
| 378 | 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] | 379 | time_t cb_expires; /* time at which callback expires */ |
| 380 | time_t cb_expires_at; /* time used to order cb_promise */ |
| 381 | unsigned cb_version; /* callback version */ |
| 382 | unsigned cb_expiry; /* callback expiry time */ |
| 383 | afs_callback_type_t cb_type; /* type of callback */ |
| 384 | bool cb_promised; /* true if promise still holds */ |
| 385 | }; |
| 386 | |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 387 | /* |
| 388 | * cached security record for one user's attempt to access a vnode |
| 389 | */ |
| 390 | struct afs_permit { |
| 391 | struct key *key; /* RxRPC ticket holding a security context */ |
| 392 | afs_access_t access_mask; /* access mask for this key */ |
| 393 | }; |
| 394 | |
| 395 | /* |
| 396 | * cache of security records from attempts to access a vnode |
| 397 | */ |
| 398 | struct afs_permits { |
| 399 | struct rcu_head rcu; /* disposal procedure */ |
| 400 | int count; /* number of records */ |
| 401 | struct afs_permit permits[0]; /* the permits so far examined */ |
| 402 | }; |
| 403 | |
David Howells | b908fe6 | 2007-04-26 15:58:17 -0700 | [diff] [blame] | 404 | /* |
| 405 | * record of one of a system's set of network interfaces |
| 406 | */ |
| 407 | struct afs_interface { |
David Howells | b908fe6 | 2007-04-26 15:58:17 -0700 | [diff] [blame] | 408 | struct in_addr address; /* IPv4 address bound to interface */ |
| 409 | struct in_addr netmask; /* netmask applied to address */ |
| 410 | unsigned mtu; /* MTU of interface */ |
| 411 | }; |
| 412 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 413 | /*****************************************************************************/ |
| 414 | /* |
David Howells | 9b3f26c | 2009-04-03 16:42:41 +0100 | [diff] [blame] | 415 | * cache.c |
| 416 | */ |
| 417 | #ifdef CONFIG_AFS_FSCACHE |
| 418 | extern struct fscache_netfs afs_cache_netfs; |
| 419 | extern struct fscache_cookie_def afs_cell_cache_index_def; |
| 420 | extern struct fscache_cookie_def afs_vlocation_cache_index_def; |
| 421 | extern struct fscache_cookie_def afs_volume_cache_index_def; |
| 422 | extern struct fscache_cookie_def afs_vnode_cache_index_def; |
| 423 | #else |
| 424 | #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) |
| 425 | #define afs_vlocation_cache_index_def (*(struct fscache_cookie_def *) NULL) |
| 426 | #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) |
| 427 | #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) |
| 428 | #endif |
| 429 | |
| 430 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 431 | * callback.c |
| 432 | */ |
| 433 | extern void afs_init_callback_state(struct afs_server *); |
| 434 | extern void afs_broken_callback_work(struct work_struct *); |
| 435 | extern void afs_break_callbacks(struct afs_server *, size_t, |
| 436 | struct afs_callback[]); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 437 | extern void afs_discard_callback_on_delete(struct afs_vnode *); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 438 | extern void afs_give_up_callback(struct afs_vnode *); |
| 439 | extern void afs_dispatch_give_up_callbacks(struct work_struct *); |
| 440 | extern void afs_flush_callback_breaks(struct afs_server *); |
| 441 | extern int __init afs_callback_update_init(void); |
David Howells | fbb3fcb | 2007-05-03 03:12:46 -0700 | [diff] [blame] | 442 | extern void afs_callback_update_kill(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
| 444 | /* |
| 445 | * cell.c |
| 446 | */ |
| 447 | extern struct rw_semaphore afs_proc_cells_sem; |
| 448 | extern struct list_head afs_proc_cells; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 450 | #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0) |
| 451 | extern int afs_cell_init(char *); |
wanglei | bec5eb6 | 2010-08-11 09:38:04 +0100 | [diff] [blame] | 452 | extern struct afs_cell *afs_cell_create(const char *, unsigned, char *, bool); |
| 453 | extern struct afs_cell *afs_cell_lookup(const char *, unsigned, bool); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 454 | extern struct afs_cell *afs_grab_cell(struct afs_cell *); |
| 455 | extern void afs_put_cell(struct afs_cell *); |
| 456 | extern void afs_cell_purge(void); |
| 457 | |
| 458 | /* |
| 459 | * cmservice.c |
| 460 | */ |
| 461 | extern bool afs_cm_incoming_call(struct afs_call *); |
| 462 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | /* |
| 464 | * dir.c |
| 465 | */ |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 466 | extern const struct inode_operations afs_dir_inode_operations; |
Al Viro | d61dcce | 2011-01-12 20:04:20 -0500 | [diff] [blame] | 467 | extern const struct dentry_operations afs_fs_dentry_operations; |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 468 | extern const struct file_operations afs_dir_file_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
| 470 | /* |
| 471 | * file.c |
| 472 | */ |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 473 | extern const struct address_space_operations afs_fs_aops; |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 474 | extern const struct inode_operations afs_file_inode_operations; |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 475 | extern const struct file_operations afs_file_operations; |
| 476 | |
| 477 | extern int afs_open(struct inode *, struct file *); |
| 478 | extern int afs_release(struct inode *, struct file *); |
Al Viro | f6d335c | 2010-05-21 15:27:09 +0100 | [diff] [blame] | 479 | extern int afs_page_filler(void *, struct page *); |
David Howells | 196ee9c | 2017-01-05 10:38:34 +0000 | [diff] [blame] | 480 | extern void afs_put_read(struct afs_read *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | /* |
David Howells | e8d6c55 | 2007-07-15 23:40:12 -0700 | [diff] [blame] | 483 | * flock.c |
| 484 | */ |
| 485 | extern void __exit afs_kill_lock_manager(void); |
| 486 | extern void afs_lock_work(struct work_struct *); |
| 487 | extern void afs_lock_may_be_available(struct afs_vnode *); |
| 488 | extern int afs_lock(struct file *, int, struct file_lock *); |
| 489 | extern int afs_flock(struct file *, int, struct file_lock *); |
| 490 | |
| 491 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 492 | * fsclient.c |
| 493 | */ |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 494 | extern int afs_fs_fetch_file_status(struct afs_server *, struct key *, |
| 495 | struct afs_vnode *, struct afs_volsync *, |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 496 | bool); |
| 497 | extern int afs_fs_give_up_callbacks(struct afs_server *, bool); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 498 | extern int afs_fs_fetch_data(struct afs_server *, struct key *, |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 499 | struct afs_vnode *, struct afs_read *, bool); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 500 | extern int afs_fs_create(struct afs_server *, struct key *, |
| 501 | struct afs_vnode *, const char *, umode_t, |
| 502 | struct afs_fid *, struct afs_file_status *, |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 503 | struct afs_callback *, bool); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 504 | extern int afs_fs_remove(struct afs_server *, struct key *, |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 505 | struct afs_vnode *, const char *, bool, bool); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 506 | extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *, |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 507 | struct afs_vnode *, const char *, bool); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 508 | extern int afs_fs_symlink(struct afs_server *, struct key *, |
| 509 | struct afs_vnode *, const char *, const char *, |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 510 | struct afs_fid *, struct afs_file_status *, bool); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 511 | extern int afs_fs_rename(struct afs_server *, struct key *, |
| 512 | struct afs_vnode *, const char *, |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 513 | struct afs_vnode *, const char *, bool); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 514 | extern int afs_fs_store_data(struct afs_server *, struct afs_writeback *, |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 515 | pgoff_t, pgoff_t, unsigned, unsigned, bool); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 516 | extern int afs_fs_setattr(struct afs_server *, struct key *, |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 517 | struct afs_vnode *, struct iattr *, bool); |
David Howells | 45222b9 | 2007-05-10 22:22:20 -0700 | [diff] [blame] | 518 | extern int afs_fs_get_volume_status(struct afs_server *, struct key *, |
| 519 | struct afs_vnode *, |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 520 | struct afs_volume_status *, bool); |
David Howells | e8d6c55 | 2007-07-15 23:40:12 -0700 | [diff] [blame] | 521 | extern int afs_fs_set_lock(struct afs_server *, struct key *, |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 522 | struct afs_vnode *, afs_lock_type_t, bool); |
David Howells | e8d6c55 | 2007-07-15 23:40:12 -0700 | [diff] [blame] | 523 | extern int afs_fs_extend_lock(struct afs_server *, struct key *, |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 524 | struct afs_vnode *, bool); |
David Howells | e8d6c55 | 2007-07-15 23:40:12 -0700 | [diff] [blame] | 525 | extern int afs_fs_release_lock(struct afs_server *, struct key *, |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 526 | struct afs_vnode *, bool); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 527 | |
| 528 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | * inode.c |
| 530 | */ |
wanglei | bec5eb6 | 2010-08-11 09:38:04 +0100 | [diff] [blame] | 531 | extern struct inode *afs_iget_autocell(struct inode *, const char *, int, |
| 532 | struct key *); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 533 | extern struct inode *afs_iget(struct super_block *, struct key *, |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 534 | struct afs_fid *, struct afs_file_status *, |
| 535 | struct afs_callback *); |
David Howells | 416351f | 2007-05-09 02:33:45 -0700 | [diff] [blame] | 536 | extern void afs_zap_data(struct afs_vnode *); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 537 | extern int afs_validate(struct afs_vnode *, struct key *); |
David Howells | a528d35 | 2017-01-31 16:46:22 +0000 | [diff] [blame] | 538 | extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 539 | extern int afs_setattr(struct dentry *, struct iattr *); |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 540 | extern void afs_evict_inode(struct inode *); |
wanglei | bec5eb6 | 2010-08-11 09:38:04 +0100 | [diff] [blame] | 541 | extern int afs_drop_inode(struct inode *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
| 543 | /* |
| 544 | * main.c |
| 545 | */ |
Tejun Heo | 0ad53ee | 2011-01-14 15:56:37 +0000 | [diff] [blame] | 546 | extern struct workqueue_struct *afs_wq; |
David Howells | ff54877 | 2017-02-10 16:34:07 +0000 | [diff] [blame] | 547 | extern struct uuid_v1 afs_uuid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | |
| 549 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 550 | * misc.c |
| 551 | */ |
| 552 | extern int afs_abort_to_error(u32); |
| 553 | |
| 554 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | * mntpt.c |
| 556 | */ |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 557 | extern const struct inode_operations afs_mntpt_inode_operations; |
wanglei | bec5eb6 | 2010-08-11 09:38:04 +0100 | [diff] [blame] | 558 | extern const struct inode_operations afs_autocell_inode_operations; |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 559 | extern const struct file_operations afs_mntpt_file_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | |
David Howells | d18610b | 2011-01-14 19:04:05 +0000 | [diff] [blame] | 561 | extern struct vfsmount *afs_d_automount(struct path *); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 562 | extern int afs_mntpt_check_symlink(struct afs_vnode *, struct key *); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 563 | extern void afs_mntpt_kill_timer(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | |
| 565 | /* |
Arnd Bergmann | b4db2b3 | 2017-02-10 16:34:07 +0000 | [diff] [blame] | 566 | * netdevices.c |
| 567 | */ |
| 568 | extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool); |
| 569 | |
| 570 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | * proc.c |
| 572 | */ |
| 573 | extern int afs_proc_init(void); |
| 574 | extern void afs_proc_cleanup(void); |
David Howells | ec26815 | 2007-04-26 15:49:28 -0700 | [diff] [blame] | 575 | extern int afs_proc_cell_setup(struct afs_cell *); |
| 576 | extern void afs_proc_cell_remove(struct afs_cell *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 578 | /* |
| 579 | * rxrpc.c |
| 580 | */ |
David Howells | 8324f0b | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 581 | extern struct socket *afs_socket; |
David Howells | 341f741 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 582 | extern atomic_t afs_outstanding_calls; |
David Howells | 8324f0b | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 583 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 584 | extern int afs_open_socket(void); |
| 585 | extern void afs_close_socket(void); |
David Howells | 341f741 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 586 | extern void afs_put_call(struct afs_call *); |
| 587 | extern int afs_queue_call_work(struct afs_call *); |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 588 | extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t, bool); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 589 | extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *, |
| 590 | size_t, size_t); |
| 591 | extern void afs_flat_call_destructor(struct afs_call *); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 592 | extern void afs_send_empty_reply(struct afs_call *); |
David Howells | b908fe6 | 2007-04-26 15:58:17 -0700 | [diff] [blame] | 593 | extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 594 | extern int afs_extract_data(struct afs_call *, void *, size_t, bool); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 595 | |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 596 | static inline int afs_transfer_reply(struct afs_call *call) |
David Howells | 372ee16 | 2016-08-03 14:11:40 +0100 | [diff] [blame] | 597 | { |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 598 | return afs_extract_data(call, call->buffer, call->reply_max, false); |
David Howells | 372ee16 | 2016-08-03 14:11:40 +0100 | [diff] [blame] | 599 | } |
| 600 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 601 | /* |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 602 | * security.c |
| 603 | */ |
| 604 | extern void afs_clear_permits(struct afs_vnode *); |
| 605 | extern void afs_cache_permit(struct afs_vnode *, struct key *, long); |
David Howells | 416351f | 2007-05-09 02:33:45 -0700 | [diff] [blame] | 606 | extern void afs_zap_permits(struct rcu_head *); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 607 | extern struct key *afs_request_key(struct afs_cell *); |
Al Viro | 10556cb | 2011-06-20 19:28:19 -0400 | [diff] [blame] | 608 | extern int afs_permission(struct inode *, int); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 609 | |
| 610 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 611 | * server.c |
| 612 | */ |
| 613 | extern spinlock_t afs_server_peer_lock; |
| 614 | |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 615 | #define afs_get_server(S) \ |
| 616 | do { \ |
| 617 | _debug("GET SERVER %d", atomic_read(&(S)->usage)); \ |
| 618 | atomic_inc(&(S)->usage); \ |
| 619 | } while(0) |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 620 | |
| 621 | extern struct afs_server *afs_lookup_server(struct afs_cell *, |
| 622 | const struct in_addr *); |
David Howells | 8324f0b | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 623 | extern struct afs_server *afs_find_server(const struct sockaddr_rxrpc *); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 624 | extern void afs_put_server(struct afs_server *); |
| 625 | extern void __exit afs_purge_servers(void); |
| 626 | |
| 627 | /* |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 628 | * super.c |
| 629 | */ |
| 630 | extern int afs_fs_init(void); |
| 631 | extern void afs_fs_exit(void); |
| 632 | |
| 633 | /* |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 634 | * vlclient.c |
| 635 | */ |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 636 | extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *, |
| 637 | const char *, struct afs_cache_vlocation *, |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 638 | bool); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 639 | extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *, |
| 640 | afs_volid_t, afs_voltype_t, |
David Howells | 56ff9c8 | 2017-01-05 10:38:36 +0000 | [diff] [blame] | 641 | struct afs_cache_vlocation *, bool); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 642 | |
| 643 | /* |
| 644 | * vlocation.c |
| 645 | */ |
| 646 | #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0) |
| 647 | |
| 648 | extern int __init afs_vlocation_update_init(void); |
| 649 | extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *, |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 650 | struct key *, |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 651 | const char *, size_t); |
| 652 | extern void afs_put_vlocation(struct afs_vlocation *); |
David Howells | fbb3fcb | 2007-05-03 03:12:46 -0700 | [diff] [blame] | 653 | extern void afs_vlocation_purge(void); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 654 | |
| 655 | /* |
| 656 | * vnode.c |
| 657 | */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 658 | static inline struct afs_vnode *AFS_FS_I(struct inode *inode) |
| 659 | { |
| 660 | return container_of(inode, struct afs_vnode, vfs_inode); |
| 661 | } |
| 662 | |
| 663 | static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) |
| 664 | { |
| 665 | return &vnode->vfs_inode; |
| 666 | } |
| 667 | |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 668 | extern void afs_vnode_finalise_status_update(struct afs_vnode *, |
| 669 | struct afs_server *); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 670 | extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *, |
| 671 | struct key *); |
| 672 | extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *, |
David Howells | 196ee9c | 2017-01-05 10:38:34 +0000 | [diff] [blame] | 673 | struct afs_read *); |
David Howells | 260a980 | 2007-04-26 15:59:35 -0700 | [diff] [blame] | 674 | extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *, |
| 675 | umode_t, struct afs_fid *, struct afs_file_status *, |
| 676 | struct afs_callback *, struct afs_server **); |
| 677 | extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *, |
| 678 | bool); |
| 679 | extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *, |
| 680 | const char *); |
| 681 | extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *, |
| 682 | const char *, struct afs_fid *, |
| 683 | struct afs_file_status *, struct afs_server **); |
| 684 | extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *, |
| 685 | struct key *, const char *, const char *); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 686 | extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t, |
| 687 | unsigned, unsigned); |
| 688 | extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *); |
David Howells | 45222b9 | 2007-05-10 22:22:20 -0700 | [diff] [blame] | 689 | extern int afs_vnode_get_volume_status(struct afs_vnode *, struct key *, |
| 690 | struct afs_volume_status *); |
David Howells | e8d6c55 | 2007-07-15 23:40:12 -0700 | [diff] [blame] | 691 | extern int afs_vnode_set_lock(struct afs_vnode *, struct key *, |
| 692 | afs_lock_type_t); |
| 693 | extern int afs_vnode_extend_lock(struct afs_vnode *, struct key *); |
| 694 | extern int afs_vnode_release_lock(struct afs_vnode *, struct key *); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 695 | |
| 696 | /* |
| 697 | * volume.c |
| 698 | */ |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 699 | #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0) |
| 700 | |
| 701 | extern void afs_put_volume(struct afs_volume *); |
David Howells | 00d3b7a | 2007-04-26 15:57:07 -0700 | [diff] [blame] | 702 | extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *); |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 703 | extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *); |
| 704 | extern int afs_volume_release_fileserver(struct afs_vnode *, |
| 705 | struct afs_server *, int); |
| 706 | |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 707 | /* |
| 708 | * write.c |
| 709 | */ |
| 710 | extern int afs_set_page_dirty(struct page *); |
| 711 | extern void afs_put_writeback(struct afs_writeback *); |
Nick Piggin | 15b4650 | 2008-10-15 22:04:32 -0700 | [diff] [blame] | 712 | extern int afs_write_begin(struct file *file, struct address_space *mapping, |
| 713 | loff_t pos, unsigned len, unsigned flags, |
| 714 | struct page **pagep, void **fsdata); |
| 715 | extern int afs_write_end(struct file *file, struct address_space *mapping, |
| 716 | loff_t pos, unsigned len, unsigned copied, |
| 717 | struct page *page, void *fsdata); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 718 | extern int afs_writepage(struct page *, struct writeback_control *); |
| 719 | extern int afs_writepages(struct address_space *, struct writeback_control *); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 720 | extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *); |
Al Viro | 50b5551 | 2014-04-03 14:13:46 -0400 | [diff] [blame] | 721 | extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 722 | extern int afs_writeback_all(struct afs_vnode *); |
Josef Bacik | 02c24a8 | 2011-07-16 20:44:56 -0400 | [diff] [blame] | 723 | extern int afs_fsync(struct file *, loff_t, loff_t, int); |
David Howells | 31143d5 | 2007-05-09 02:33:46 -0700 | [diff] [blame] | 724 | |
| 725 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 726 | /*****************************************************************************/ |
| 727 | /* |
| 728 | * debug tracing |
| 729 | */ |
David Howells | 8e8d7f1 | 2017-01-05 10:38:34 +0000 | [diff] [blame] | 730 | #include <trace/events/afs.h> |
| 731 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 732 | extern unsigned afs_debug; |
| 733 | |
| 734 | #define dbgprintk(FMT,...) \ |
Sven Schnelle | ad16df8 | 2008-04-03 10:44:01 +0100 | [diff] [blame] | 735 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 736 | |
Harvey Harrison | 530b641 | 2008-04-30 00:55:09 -0700 | [diff] [blame] | 737 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| 738 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 739 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
| 740 | |
| 741 | |
| 742 | #if defined(__KDEBUG) |
| 743 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) |
| 744 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) |
| 745 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) |
| 746 | |
| 747 | #elif defined(CONFIG_AFS_DEBUG) |
| 748 | #define AFS_DEBUG_KENTER 0x01 |
| 749 | #define AFS_DEBUG_KLEAVE 0x02 |
| 750 | #define AFS_DEBUG_KDEBUG 0x04 |
| 751 | |
| 752 | #define _enter(FMT,...) \ |
| 753 | do { \ |
| 754 | if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ |
| 755 | kenter(FMT,##__VA_ARGS__); \ |
| 756 | } while (0) |
| 757 | |
| 758 | #define _leave(FMT,...) \ |
| 759 | do { \ |
| 760 | if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ |
| 761 | kleave(FMT,##__VA_ARGS__); \ |
| 762 | } while (0) |
| 763 | |
| 764 | #define _debug(FMT,...) \ |
| 765 | do { \ |
| 766 | if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ |
| 767 | kdebug(FMT,##__VA_ARGS__); \ |
| 768 | } while (0) |
| 769 | |
| 770 | #else |
David Howells | 12fdff3 | 2010-08-12 16:54:57 +0100 | [diff] [blame] | 771 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| 772 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
| 773 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 774 | #endif |
| 775 | |
| 776 | /* |
| 777 | * debug assertion checking |
| 778 | */ |
| 779 | #if 1 // defined(__KDEBUGALL) |
| 780 | |
| 781 | #define ASSERT(X) \ |
| 782 | do { \ |
| 783 | if (unlikely(!(X))) { \ |
| 784 | printk(KERN_ERR "\n"); \ |
| 785 | printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| 786 | BUG(); \ |
| 787 | } \ |
| 788 | } while(0) |
| 789 | |
| 790 | #define ASSERTCMP(X, OP, Y) \ |
| 791 | do { \ |
| 792 | if (unlikely(!((X) OP (Y)))) { \ |
| 793 | printk(KERN_ERR "\n"); \ |
| 794 | printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| 795 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ |
| 796 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 797 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ |
| 798 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 799 | BUG(); \ |
| 800 | } \ |
| 801 | } while(0) |
| 802 | |
David Howells | 416351f | 2007-05-09 02:33:45 -0700 | [diff] [blame] | 803 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
| 804 | do { \ |
| 805 | if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ |
| 806 | printk(KERN_ERR "\n"); \ |
| 807 | printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| 808 | printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ |
| 809 | (unsigned long)(L), (unsigned long)(N), \ |
| 810 | (unsigned long)(H)); \ |
| 811 | printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ |
| 812 | (unsigned long)(L), (unsigned long)(N), \ |
| 813 | (unsigned long)(H)); \ |
| 814 | BUG(); \ |
| 815 | } \ |
| 816 | } while(0) |
| 817 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 818 | #define ASSERTIF(C, X) \ |
| 819 | do { \ |
| 820 | if (unlikely((C) && !(X))) { \ |
| 821 | printk(KERN_ERR "\n"); \ |
| 822 | printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| 823 | BUG(); \ |
| 824 | } \ |
| 825 | } while(0) |
| 826 | |
| 827 | #define ASSERTIFCMP(C, X, OP, Y) \ |
| 828 | do { \ |
| 829 | if (unlikely((C) && !((X) OP (Y)))) { \ |
| 830 | printk(KERN_ERR "\n"); \ |
| 831 | printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| 832 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ |
| 833 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 834 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ |
| 835 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 836 | BUG(); \ |
| 837 | } \ |
| 838 | } while(0) |
| 839 | |
| 840 | #else |
| 841 | |
| 842 | #define ASSERT(X) \ |
| 843 | do { \ |
| 844 | } while(0) |
| 845 | |
| 846 | #define ASSERTCMP(X, OP, Y) \ |
| 847 | do { \ |
| 848 | } while(0) |
| 849 | |
David Howells | 416351f | 2007-05-09 02:33:45 -0700 | [diff] [blame] | 850 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
| 851 | do { \ |
| 852 | } while(0) |
| 853 | |
David Howells | 08e0e7c | 2007-04-26 15:55:03 -0700 | [diff] [blame] | 854 | #define ASSERTIF(C, X) \ |
| 855 | do { \ |
| 856 | } while(0) |
| 857 | |
| 858 | #define ASSERTIFCMP(C, X, OP, Y) \ |
| 859 | do { \ |
| 860 | } while(0) |
| 861 | |
| 862 | #endif /* __KDEBUGALL */ |