1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* internal AFS stuff 3 * 4 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 */ 7 8 #include <linux/compiler.h> 9 #include <linux/kernel.h> 10 #include <linux/ktime.h> 11 #include <linux/fs.h> 12 #include <linux/pagemap.h> 13 #include <linux/rxrpc.h> 14 #include <linux/key.h> 15 #include <linux/workqueue.h> 16 #include <linux/sched.h> 17 #define FSCACHE_USE_NEW_IO_API 18 #include <linux/fscache.h> 19 #include <linux/backing-dev.h> 20 #include <linux/uuid.h> 21 #include <linux/mm_types.h> 22 #include <linux/dns_resolver.h> 23 #include <net/net_namespace.h> 24 #include <net/netns/generic.h> 25 #include <net/sock.h> 26 #include <net/af_rxrpc.h> 27 28 #include "afs.h" 29 #include "afs_vl.h" 30 31 #define AFS_CELL_MAX_ADDRS 15 32 33 struct pagevec; 34 struct afs_call; 35 struct afs_vnode; 36 37 /* 38 * Partial file-locking emulation mode. (The problem being that AFS3 only 39 * allows whole-file locks and no upgrading/downgrading). 40 */ 41 enum afs_flock_mode { 42 afs_flock_mode_unset, 43 afs_flock_mode_local, /* Local locking only */ 44 afs_flock_mode_openafs, /* Don't get server lock for a partial lock */ 45 afs_flock_mode_strict, /* Always get a server lock for a partial lock */ 46 afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */ 47 }; 48 49 struct afs_fs_context { 50 bool force; /* T to force cell type */ 51 bool autocell; /* T if set auto mount operation */ 52 bool dyn_root; /* T if dynamic root */ 53 bool no_cell; /* T if the source is "none" (for dynroot) */ 54 enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */ 55 afs_voltype_t type; /* type of volume requested */ 56 unsigned int volnamesz; /* size of volume name */ 57 const char *volname; /* name of volume to mount */ 58 struct afs_net *net; /* the AFS net namespace stuff */ 59 struct afs_cell *cell; /* cell in which to find volume */ 60 struct afs_volume *volume; /* volume record */ 61 struct key *key; /* key to use for secure mounting */ 62 }; 63 64 enum afs_call_state { 65 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ 66 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ 67 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ 68 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ 69 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ 70 AFS_CALL_SV_REPLYING, /* Server: Replying */ 71 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ 72 AFS_CALL_COMPLETE, /* Completed or failed */ 73 }; 74 75 /* 76 * List of server addresses. 77 */ 78 struct afs_addr_list { 79 struct rcu_head rcu; 80 refcount_t usage; 81 u32 version; /* Version */ 82 unsigned char max_addrs; 83 unsigned char nr_addrs; 84 unsigned char preferred; /* Preferred address */ 85 unsigned char nr_ipv4; /* Number of IPv4 addresses */ 86 enum dns_record_source source:8; 87 enum dns_lookup_status status:8; 88 unsigned long failed; /* Mask of addrs that failed locally/ICMP */ 89 unsigned long responded; /* Mask of addrs that responded */ 90 struct sockaddr_rxrpc addrs[]; 91 #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8)) 92 }; 93 94 /* 95 * a record of an in-progress RxRPC call 96 */ 97 struct afs_call { 98 const struct afs_call_type *type; /* type of call */ 99 struct afs_addr_list *alist; /* Address is alist[addr_ix] */ 100 wait_queue_head_t waitq; /* processes awaiting completion */ 101 struct work_struct async_work; /* async I/O processor */ 102 struct work_struct work; /* actual work processor */ 103 struct rxrpc_call *rxcall; /* RxRPC call handle */ 104 struct key *key; /* security for this call */ 105 struct afs_net *net; /* The network namespace */ 106 struct afs_server *server; /* The fileserver record if fs op (pins ref) */ 107 struct afs_vlserver *vlserver; /* The vlserver record if vl op */ 108 void *request; /* request data (first part) */ 109 size_t iov_len; /* Size of *iter to be used */ 110 struct iov_iter def_iter; /* Default buffer/data iterator */ 111 struct iov_iter *write_iter; /* Iterator defining write to be made */ 112 struct iov_iter *iter; /* Iterator currently in use */ 113 union { /* Convenience for ->def_iter */ 114 struct kvec kvec[1]; 115 struct bio_vec bvec[1]; 116 }; 117 void *buffer; /* reply receive buffer */ 118 union { 119 long ret0; /* Value to reply with instead of 0 */ 120 struct afs_addr_list *ret_alist; 121 struct afs_vldb_entry *ret_vldb; 122 char *ret_str; 123 }; 124 struct afs_operation *op; 125 unsigned int server_index; 126 atomic_t usage; 127 enum afs_call_state state; 128 spinlock_t state_lock; 129 int error; /* error code */ 130 u32 abort_code; /* Remote abort ID or 0 */ 131 unsigned int max_lifespan; /* Maximum lifespan to set if not 0 */ 132 unsigned request_size; /* size of request data */ 133 unsigned reply_max; /* maximum size of reply */ 134 unsigned count2; /* count used in unmarshalling */ 135 unsigned char unmarshall; /* unmarshalling phase */ 136 unsigned char addr_ix; /* Address in ->alist */ 137 bool drop_ref; /* T if need to drop ref for incoming call */ 138 bool need_attention; /* T if RxRPC poked us */ 139 bool async; /* T if asynchronous */ 140 bool upgrade; /* T to request service upgrade */ 141 bool have_reply_time; /* T if have got reply_time */ 142 bool intr; /* T if interruptible */ 143 bool unmarshalling_error; /* T if an unmarshalling error occurred */ 144 u16 service_id; /* Actual service ID (after upgrade) */ 145 unsigned int debug_id; /* Trace ID */ 146 u32 operation_ID; /* operation ID for an incoming call */ 147 u32 count; /* count for use in unmarshalling */ 148 union { /* place to extract temporary data */ 149 struct { 150 __be32 tmp_u; 151 __be32 tmp; 152 } __attribute__((packed)); 153 __be64 tmp64; 154 }; 155 ktime_t reply_time; /* Time of first reply packet */ 156 }; 157 158 struct afs_call_type { 159 const char *name; 160 unsigned int op; /* Really enum afs_fs_operation */ 161 162 /* deliver request or reply data to an call 163 * - returning an error will cause the call to be aborted 164 */ 165 int (*deliver)(struct afs_call *call); 166 167 /* clean up a call */ 168 void (*destructor)(struct afs_call *call); 169 170 /* Work function */ 171 void (*work)(struct work_struct *work); 172 173 /* Call done function (gets called immediately on success or failure) */ 174 void (*done)(struct afs_call *call); 175 }; 176 177 /* 178 * Key available for writeback on a file. 179 */ 180 struct afs_wb_key { 181 refcount_t usage; 182 struct key *key; 183 struct list_head vnode_link; /* Link in vnode->wb_keys */ 184 }; 185 186 /* 187 * AFS open file information record. Pointed to by file->private_data. 188 */ 189 struct afs_file { 190 struct key *key; /* The key this file was opened with */ 191 struct afs_wb_key *wb; /* Writeback key record for this file */ 192 }; 193 194 static inline struct key *afs_file_key(struct file *file) 195 { 196 struct afs_file *af = file->private_data; 197 198 return af->key; 199 } 200 201 /* 202 * Record of an outstanding read operation on a vnode. 203 */ 204 struct afs_read { 205 loff_t pos; /* Where to start reading */ 206 loff_t len; /* How much we're asking for */ 207 loff_t actual_len; /* How much we're actually getting */ 208 loff_t file_size; /* File size returned by server */ 209 struct key *key; /* The key to use to reissue the read */ 210 struct afs_vnode *vnode; /* The file being read into. */ 211 struct netfs_read_subrequest *subreq; /* Fscache helper read request this belongs to */ 212 afs_dataversion_t data_version; /* Version number returned by server */ 213 refcount_t usage; 214 unsigned int call_debug_id; 215 unsigned int nr_pages; 216 int error; 217 void (*done)(struct afs_read *); 218 void (*cleanup)(struct afs_read *); 219 struct iov_iter *iter; /* Iterator representing the buffer */ 220 struct iov_iter def_iter; /* Default iterator */ 221 }; 222 223 /* 224 * AFS superblock private data 225 * - there's one superblock per volume 226 */ 227 struct afs_super_info { 228 struct net *net_ns; /* Network namespace */ 229 struct afs_cell *cell; /* The cell in which the volume resides */ 230 struct afs_volume *volume; /* volume record */ 231 enum afs_flock_mode flock_mode:8; /* File locking emulation mode */ 232 bool dyn_root; /* True if dynamic root */ 233 }; 234 235 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) 236 { 237 return sb->s_fs_info; 238 } 239 240 extern struct file_system_type afs_fs_type; 241 242 /* 243 * Set of substitutes for @sys. 244 */ 245 struct afs_sysnames { 246 #define AFS_NR_SYSNAME 16 247 char *subs[AFS_NR_SYSNAME]; 248 refcount_t usage; 249 unsigned short nr; 250 char blank[1]; 251 }; 252 253 /* 254 * AFS network namespace record. 255 */ 256 struct afs_net { 257 struct net *net; /* Backpointer to the owning net namespace */ 258 struct afs_uuid uuid; 259 bool live; /* F if this namespace is being removed */ 260 261 /* AF_RXRPC I/O stuff */ 262 struct socket *socket; 263 struct afs_call *spare_incoming_call; 264 struct work_struct charge_preallocation_work; 265 struct mutex socket_mutex; 266 atomic_t nr_outstanding_calls; 267 atomic_t nr_superblocks; 268 269 /* Cell database */ 270 struct rb_root cells; 271 struct afs_cell *ws_cell; 272 struct work_struct cells_manager; 273 struct timer_list cells_timer; 274 atomic_t cells_outstanding; 275 struct rw_semaphore cells_lock; 276 struct mutex cells_alias_lock; 277 278 struct mutex proc_cells_lock; 279 struct hlist_head proc_cells; 280 281 /* Known servers. Theoretically each fileserver can only be in one 282 * cell, but in practice, people create aliases and subsets and there's 283 * no easy way to distinguish them. 284 */ 285 seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */ 286 struct rb_root fs_servers; /* afs_server (by server UUID or address) */ 287 struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */ 288 struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */ 289 struct hlist_head fs_proc; /* procfs servers list */ 290 291 struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ 292 struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */ 293 seqlock_t fs_addr_lock; /* For fs_addresses[46] */ 294 295 struct work_struct fs_manager; 296 struct timer_list fs_timer; 297 298 struct work_struct fs_prober; 299 struct timer_list fs_probe_timer; 300 atomic_t servers_outstanding; 301 302 /* File locking renewal management */ 303 struct mutex lock_manager_mutex; 304 305 /* Misc */ 306 struct super_block *dynroot_sb; /* Dynamic root mount superblock */ 307 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ 308 struct afs_sysnames *sysnames; 309 rwlock_t sysnames_lock; 310 311 /* Statistics counters */ 312 atomic_t n_lookup; /* Number of lookups done */ 313 atomic_t n_reval; /* Number of dentries needing revalidation */ 314 atomic_t n_inval; /* Number of invalidations by the server */ 315 atomic_t n_relpg; /* Number of invalidations by releasepage */ 316 atomic_t n_read_dir; /* Number of directory pages read */ 317 atomic_t n_dir_cr; /* Number of directory entry creation edits */ 318 atomic_t n_dir_rm; /* Number of directory entry removal edits */ 319 atomic_t n_stores; /* Number of store ops */ 320 atomic_long_t n_store_bytes; /* Number of bytes stored */ 321 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ 322 atomic_t n_fetches; /* Number of data fetch ops */ 323 }; 324 325 extern const char afs_init_sysname[]; 326 327 enum afs_cell_state { 328 AFS_CELL_UNSET, 329 AFS_CELL_ACTIVATING, 330 AFS_CELL_ACTIVE, 331 AFS_CELL_DEACTIVATING, 332 AFS_CELL_INACTIVE, 333 AFS_CELL_FAILED, 334 AFS_CELL_REMOVED, 335 }; 336 337 /* 338 * AFS cell record. 339 * 340 * This is a tricky concept to get right as it is possible to create aliases 341 * simply by pointing AFSDB/SRV records for two names at the same set of VL 342 * servers; it is also possible to do things like setting up two sets of VL 343 * servers, one of which provides a superset of the volumes provided by the 344 * other (for internal/external division, for example). 345 * 346 * Cells only exist in the sense that (a) a cell's name maps to a set of VL 347 * servers and (b) a cell's name is used by the client to select the key to use 348 * for authentication and encryption. The cell name is not typically used in 349 * the protocol. 350 * 351 * Two cells are determined to be aliases if they have an explicit alias (YFS 352 * only), share any VL servers in common or have at least one volume in common. 353 * "In common" means that the address list of the VL servers or the fileservers 354 * share at least one endpoint. 355 */ 356 struct afs_cell { 357 union { 358 struct rcu_head rcu; 359 struct rb_node net_node; /* Node in net->cells */ 360 }; 361 struct afs_net *net; 362 struct afs_cell *alias_of; /* The cell this is an alias of */ 363 struct afs_volume *root_volume; /* The root.cell volume if there is one */ 364 struct key *anonymous_key; /* anonymous user key for this cell */ 365 struct work_struct manager; /* Manager for init/deinit/dns */ 366 struct hlist_node proc_link; /* /proc cell list link */ 367 #ifdef CONFIG_AFS_FSCACHE 368 struct fscache_cookie *cache; /* caching cookie */ 369 #endif 370 time64_t dns_expiry; /* Time AFSDB/SRV record expires */ 371 time64_t last_inactive; /* Time of last drop of usage count */ 372 atomic_t ref; /* Struct refcount */ 373 atomic_t active; /* Active usage counter */ 374 unsigned long flags; 375 #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */ 376 #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */ 377 #define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */ 378 enum afs_cell_state state; 379 short error; 380 enum dns_record_source dns_source:8; /* Latest source of data from lookup */ 381 enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */ 382 unsigned int dns_lookup_count; /* Counter of DNS lookups */ 383 unsigned int debug_id; 384 385 /* The volumes belonging to this cell */ 386 struct rb_root volumes; /* Tree of volumes on this server */ 387 struct hlist_head proc_volumes; /* procfs volume list */ 388 seqlock_t volume_lock; /* For volumes */ 389 390 /* Active fileserver interaction state. */ 391 struct rb_root fs_servers; /* afs_server (by server UUID) */ 392 seqlock_t fs_lock; /* For fs_servers */ 393 struct rw_semaphore fs_open_mmaps_lock; 394 struct list_head fs_open_mmaps; /* List of vnodes that are mmapped */ 395 atomic_t fs_s_break; /* Counter of CB.InitCallBackState messages */ 396 397 /* VL server list. */ 398 rwlock_t vl_servers_lock; /* Lock on vl_servers */ 399 struct afs_vlserver_list __rcu *vl_servers; 400 401 u8 name_len; /* Length of name */ 402 char *name; /* Cell name, case-flattened and NUL-padded */ 403 }; 404 405 /* 406 * Volume Location server record. 407 */ 408 struct afs_vlserver { 409 struct rcu_head rcu; 410 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */ 411 unsigned long flags; 412 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ 413 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ 414 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ 415 #define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */ 416 rwlock_t lock; /* Lock on addresses */ 417 atomic_t usage; 418 unsigned int rtt; /* Server's current RTT in uS */ 419 420 /* Probe state */ 421 wait_queue_head_t probe_wq; 422 atomic_t probe_outstanding; 423 spinlock_t probe_lock; 424 struct { 425 unsigned int rtt; /* RTT in uS */ 426 u32 abort_code; 427 short error; 428 unsigned short flags; 429 #define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */ 430 #define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */ 431 #define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */ 432 #define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */ 433 } probe; 434 435 u16 port; 436 u16 name_len; /* Length of name */ 437 char name[]; /* Server name, case-flattened */ 438 }; 439 440 /* 441 * Weighted list of Volume Location servers. 442 */ 443 struct afs_vlserver_entry { 444 u16 priority; /* Preference (as SRV) */ 445 u16 weight; /* Weight (as SRV) */ 446 enum dns_record_source source:8; 447 enum dns_lookup_status status:8; 448 struct afs_vlserver *server; 449 }; 450 451 struct afs_vlserver_list { 452 struct rcu_head rcu; 453 atomic_t usage; 454 u8 nr_servers; 455 u8 index; /* Server currently in use */ 456 u8 preferred; /* Preferred server */ 457 enum dns_record_source source:8; 458 enum dns_lookup_status status:8; 459 rwlock_t lock; 460 struct afs_vlserver_entry servers[]; 461 }; 462 463 /* 464 * Cached VLDB entry. 465 * 466 * This is pointed to by cell->vldb_entries, indexed by name. 467 */ 468 struct afs_vldb_entry { 469 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ 470 471 unsigned long flags; 472 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ 473 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ 474 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ 475 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ 476 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ 477 478 uuid_t fs_server[AFS_NMAXNSERVERS]; 479 u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */ 480 u8 fs_mask[AFS_NMAXNSERVERS]; 481 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 482 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 483 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 484 short error; 485 u8 nr_servers; /* Number of server records */ 486 u8 name_len; 487 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 488 }; 489 490 /* 491 * Record of fileserver with which we're actively communicating. 492 */ 493 struct afs_server { 494 struct rcu_head rcu; 495 union { 496 uuid_t uuid; /* Server ID */ 497 struct afs_uuid _uuid; 498 }; 499 500 struct afs_addr_list __rcu *addresses; 501 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 502 struct rb_node uuid_rb; /* Link in net->fs_servers */ 503 struct afs_server __rcu *uuid_next; /* Next server with same UUID */ 504 struct afs_server *uuid_prev; /* Previous server with same UUID */ 505 struct list_head probe_link; /* Link in net->fs_probe_list */ 506 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ 507 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ 508 struct hlist_node proc_link; /* Link in net->fs_proc */ 509 struct work_struct initcb_work; /* Work for CB.InitCallBackState* */ 510 struct afs_server *gc_next; /* Next server in manager's list */ 511 time64_t unuse_time; /* Time at which last unused */ 512 unsigned long flags; 513 #define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */ 514 #define AFS_SERVER_FL_UPDATING 1 515 #define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */ 516 #define AFS_SERVER_FL_NOT_READY 4 /* The record is not ready for use */ 517 #define AFS_SERVER_FL_NOT_FOUND 5 /* VL server says no such server */ 518 #define AFS_SERVER_FL_VL_FAIL 6 /* Failed to access VL server */ 519 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ 520 #define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */ 521 #define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */ 522 #define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */ 523 #define AFS_SERVER_FL_HAS_FS64 19 /* Fileserver supports FS.{Fetch,Store}Data64 */ 524 atomic_t ref; /* Object refcount */ 525 atomic_t active; /* Active user count */ 526 u32 addr_version; /* Address list version */ 527 unsigned int rtt; /* Server's current RTT in uS */ 528 unsigned int debug_id; /* Debugging ID for traces */ 529 530 /* file service access */ 531 rwlock_t fs_lock; /* access lock */ 532 533 /* callback promise management */ 534 unsigned cb_s_break; /* Break-everything counter. */ 535 536 /* Probe state */ 537 unsigned long probed_at; /* Time last probe was dispatched (jiffies) */ 538 wait_queue_head_t probe_wq; 539 atomic_t probe_outstanding; 540 spinlock_t probe_lock; 541 struct { 542 unsigned int rtt; /* RTT in uS */ 543 u32 abort_code; 544 short error; 545 bool responded:1; 546 bool is_yfs:1; 547 bool not_yfs:1; 548 bool local_failure:1; 549 } probe; 550 }; 551 552 /* 553 * Replaceable volume server list. 554 */ 555 struct afs_server_entry { 556 struct afs_server *server; 557 }; 558 559 struct afs_server_list { 560 afs_volid_t vids[AFS_MAXTYPES]; /* Volume IDs */ 561 refcount_t usage; 562 unsigned char nr_servers; 563 unsigned char preferred; /* Preferred server */ 564 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ 565 unsigned int seq; /* Set to ->servers_seq when installed */ 566 rwlock_t lock; 567 struct afs_server_entry servers[]; 568 }; 569 570 /* 571 * Live AFS volume management. 572 */ 573 struct afs_volume { 574 union { 575 struct rcu_head rcu; 576 afs_volid_t vid; /* volume ID */ 577 }; 578 atomic_t usage; 579 time64_t update_at; /* Time at which to next update */ 580 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 581 struct rb_node cell_node; /* Link in cell->volumes */ 582 struct hlist_node proc_link; /* Link in cell->proc_volumes */ 583 struct super_block __rcu *sb; /* Superblock on which inodes reside */ 584 unsigned long flags; 585 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ 586 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ 587 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ 588 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ 589 #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ 590 #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ 591 #define AFS_VOLUME_MAYBE_NO_IBULK 6 /* - T if some servers don't have InlineBulkStatus */ 592 #ifdef CONFIG_AFS_FSCACHE 593 struct fscache_cookie *cache; /* caching cookie */ 594 #endif 595 struct afs_server_list __rcu *servers; /* List of servers on which volume resides */ 596 rwlock_t servers_lock; /* Lock for ->servers */ 597 unsigned int servers_seq; /* Incremented each time ->servers changes */ 598 599 unsigned cb_v_break; /* Break-everything counter. */ 600 rwlock_t cb_v_break_lock; 601 602 afs_voltype_t type; /* type of volume */ 603 char type_force; /* force volume type (suppress R/O -> R/W) */ 604 u8 name_len; 605 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 606 }; 607 608 enum afs_lock_state { 609 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ 610 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ 611 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ 612 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ 613 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ 614 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ 615 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ 616 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */ 617 }; 618 619 /* 620 * AFS inode private data. 621 * 622 * Note that afs_alloc_inode() *must* reset anything that could incorrectly 623 * leak from one inode to another. 624 */ 625 struct afs_vnode { 626 struct inode vfs_inode; /* the VFS's inode record */ 627 628 struct afs_volume *volume; /* volume on which vnode resides */ 629 struct afs_fid fid; /* the file identifier for this inode */ 630 struct afs_file_status status; /* AFS status info for this file */ 631 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ 632 #ifdef CONFIG_AFS_FSCACHE 633 struct fscache_cookie *cache; /* caching cookie */ 634 #endif 635 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ 636 struct mutex io_lock; /* Lock for serialising I/O on this mutex */ 637 struct rw_semaphore validate_lock; /* lock for validating this vnode */ 638 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ 639 struct key *silly_key; /* Silly rename key */ 640 spinlock_t wb_lock; /* lock for wb_keys */ 641 spinlock_t lock; /* waitqueue/flags lock */ 642 unsigned long flags; 643 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ 644 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 645 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ 646 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 647 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 648 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 649 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ 650 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ 651 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ 652 #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */ 653 #define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */ 654 655 struct list_head wb_keys; /* List of keys available for writeback */ 656 struct list_head pending_locks; /* locks waiting to be granted */ 657 struct list_head granted_locks; /* locks granted on this file */ 658 struct delayed_work lock_work; /* work to be done in locking */ 659 struct key *lock_key; /* Key to be used in lock ops */ 660 ktime_t locked_at; /* Time at which lock obtained */ 661 enum afs_lock_state lock_state : 8; 662 afs_lock_type_t lock_type : 8; 663 664 /* outstanding callback notification on this file */ 665 struct work_struct cb_work; /* Work for mmap'd files */ 666 struct list_head cb_mmap_link; /* Link in cell->fs_open_mmaps */ 667 void *cb_server; /* Server with callback/filelock */ 668 atomic_t cb_nr_mmap; /* Number of mmaps */ 669 unsigned int cb_fs_s_break; /* Mass server break counter (cell->fs_s_break) */ 670 unsigned int cb_s_break; /* Mass break counter on ->server */ 671 unsigned int cb_v_break; /* Mass break counter on ->volume */ 672 unsigned int cb_break; /* Break counter on vnode */ 673 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ 674 675 time64_t cb_expires_at; /* time at which callback expires */ 676 }; 677 678 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) 679 { 680 #ifdef CONFIG_AFS_FSCACHE 681 return vnode->cache; 682 #else 683 return NULL; 684 #endif 685 } 686 687 /* 688 * cached security record for one user's attempt to access a vnode 689 */ 690 struct afs_permit { 691 struct key *key; /* RxRPC ticket holding a security context */ 692 afs_access_t access; /* CallerAccess value for this key */ 693 }; 694 695 /* 696 * Immutable cache of CallerAccess records from attempts to access vnodes. 697 * These may be shared between multiple vnodes. 698 */ 699 struct afs_permits { 700 struct rcu_head rcu; 701 struct hlist_node hash_node; /* Link in hash */ 702 unsigned long h; /* Hash value for this permit list */ 703 refcount_t usage; 704 unsigned short nr_permits; /* Number of records */ 705 bool invalidated; /* Invalidated due to key change */ 706 struct afs_permit permits[]; /* List of permits sorted by key pointer */ 707 }; 708 709 /* 710 * Error prioritisation and accumulation. 711 */ 712 struct afs_error { 713 short error; /* Accumulated error */ 714 bool responded; /* T if server responded */ 715 }; 716 717 /* 718 * Cursor for iterating over a server's address list. 719 */ 720 struct afs_addr_cursor { 721 struct afs_addr_list *alist; /* Current address list (pins ref) */ 722 unsigned long tried; /* Tried addresses */ 723 signed char index; /* Current address */ 724 bool responded; /* T if the current address responded */ 725 unsigned short nr_iterations; /* Number of address iterations */ 726 short error; 727 u32 abort_code; 728 }; 729 730 /* 731 * Cursor for iterating over a set of volume location servers. 732 */ 733 struct afs_vl_cursor { 734 struct afs_addr_cursor ac; 735 struct afs_cell *cell; /* The cell we're querying */ 736 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ 737 struct afs_vlserver *server; /* Server on which this resides */ 738 struct key *key; /* Key for the server */ 739 unsigned long untried; /* Bitmask of untried servers */ 740 short index; /* Current server */ 741 short error; 742 unsigned short flags; 743 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ 744 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ 745 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ 746 unsigned short nr_iterations; /* Number of server iterations */ 747 }; 748 749 /* 750 * Fileserver operation methods. 751 */ 752 struct afs_operation_ops { 753 void (*issue_afs_rpc)(struct afs_operation *op); 754 void (*issue_yfs_rpc)(struct afs_operation *op); 755 void (*success)(struct afs_operation *op); 756 void (*aborted)(struct afs_operation *op); 757 void (*failed)(struct afs_operation *op); 758 void (*edit_dir)(struct afs_operation *op); 759 void (*put)(struct afs_operation *op); 760 }; 761 762 struct afs_vnode_param { 763 struct afs_vnode *vnode; 764 struct afs_fid fid; /* Fid to access */ 765 struct afs_status_cb scb; /* Returned status and callback promise */ 766 afs_dataversion_t dv_before; /* Data version before the call */ 767 unsigned int cb_break_before; /* cb_break + cb_s_break before the call */ 768 u8 dv_delta; /* Expected change in data version */ 769 bool put_vnode:1; /* T if we have a ref on the vnode */ 770 bool need_io_lock:1; /* T if we need the I/O lock on this */ 771 bool update_ctime:1; /* Need to update the ctime */ 772 bool set_size:1; /* Must update i_size */ 773 bool op_unlinked:1; /* True if file was unlinked by op */ 774 bool speculative:1; /* T if speculative status fetch (no vnode lock) */ 775 bool modification:1; /* Set if the content gets modified */ 776 }; 777 778 /* 779 * Fileserver operation wrapper, handling server and address rotation 780 * asynchronously. May make simultaneous calls to multiple servers. 781 */ 782 struct afs_operation { 783 struct afs_net *net; /* Network namespace */ 784 struct key *key; /* Key for the cell */ 785 const struct afs_call_type *type; /* Type of call done */ 786 const struct afs_operation_ops *ops; 787 788 /* Parameters/results for the operation */ 789 struct afs_volume *volume; /* Volume being accessed */ 790 struct afs_vnode_param file[2]; 791 struct afs_vnode_param *more_files; 792 struct afs_volsync volsync; 793 struct dentry *dentry; /* Dentry to be altered */ 794 struct dentry *dentry_2; /* Second dentry to be altered */ 795 struct timespec64 mtime; /* Modification time to record */ 796 struct timespec64 ctime; /* Change time to set */ 797 short nr_files; /* Number of entries in file[], more_files */ 798 short error; 799 unsigned int debug_id; 800 801 unsigned int cb_v_break; /* Volume break counter before op */ 802 unsigned int cb_s_break; /* Server break counter before op */ 803 804 union { 805 struct { 806 int which; /* Which ->file[] to fetch for */ 807 } fetch_status; 808 struct { 809 int reason; /* enum afs_edit_dir_reason */ 810 mode_t mode; 811 const char *symlink; 812 } create; 813 struct { 814 bool need_rehash; 815 } unlink; 816 struct { 817 struct dentry *rehash; 818 struct dentry *tmp; 819 bool new_negative; 820 } rename; 821 struct { 822 struct afs_read *req; 823 } fetch; 824 struct { 825 afs_lock_type_t type; 826 } lock; 827 struct { 828 struct iov_iter *write_iter; 829 loff_t pos; 830 loff_t size; 831 loff_t i_size; 832 bool laundering; /* Laundering page, PG_writeback not set */ 833 } store; 834 struct { 835 struct iattr *attr; 836 loff_t old_i_size; 837 } setattr; 838 struct afs_acl *acl; 839 struct yfs_acl *yacl; 840 struct { 841 struct afs_volume_status vs; 842 struct kstatfs *buf; 843 } volstatus; 844 }; 845 846 /* Fileserver iteration state */ 847 struct afs_addr_cursor ac; 848 struct afs_server_list *server_list; /* Current server list (pins ref) */ 849 struct afs_server *server; /* Server we're using (ref pinned by server_list) */ 850 struct afs_call *call; 851 unsigned long untried; /* Bitmask of untried servers */ 852 short index; /* Current server */ 853 unsigned short nr_iterations; /* Number of server iterations */ 854 855 unsigned int flags; 856 #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ 857 #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ 858 #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ 859 #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ 860 #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ 861 #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ 862 #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ 863 #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ 864 #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ 865 #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ 866 #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ 867 #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ 868 #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ 869 }; 870 871 /* 872 * Cache auxiliary data. 873 */ 874 struct afs_vnode_cache_aux { 875 u64 data_version; 876 } __packed; 877 878 /* 879 * We use folio->private to hold the amount of the folio that we've written to, 880 * splitting the field into two parts. However, we need to represent a range 881 * 0...FOLIO_SIZE, so we reduce the resolution if the size of the folio 882 * exceeds what we can encode. 883 */ 884 #ifdef CONFIG_64BIT 885 #define __AFS_FOLIO_PRIV_MASK 0x7fffffffUL 886 #define __AFS_FOLIO_PRIV_SHIFT 32 887 #define __AFS_FOLIO_PRIV_MMAPPED 0x80000000UL 888 #else 889 #define __AFS_FOLIO_PRIV_MASK 0x7fffUL 890 #define __AFS_FOLIO_PRIV_SHIFT 16 891 #define __AFS_FOLIO_PRIV_MMAPPED 0x8000UL 892 #endif 893 894 static inline unsigned int afs_folio_dirty_resolution(struct folio *folio) 895 { 896 int shift = folio_shift(folio) - (__AFS_FOLIO_PRIV_SHIFT - 1); 897 return (shift > 0) ? shift : 0; 898 } 899 900 static inline size_t afs_folio_dirty_from(struct folio *folio, unsigned long priv) 901 { 902 unsigned long x = priv & __AFS_FOLIO_PRIV_MASK; 903 904 /* The lower bound is inclusive */ 905 return x << afs_folio_dirty_resolution(folio); 906 } 907 908 static inline size_t afs_folio_dirty_to(struct folio *folio, unsigned long priv) 909 { 910 unsigned long x = (priv >> __AFS_FOLIO_PRIV_SHIFT) & __AFS_FOLIO_PRIV_MASK; 911 912 /* The upper bound is immediately beyond the region */ 913 return (x + 1) << afs_folio_dirty_resolution(folio); 914 } 915 916 static inline unsigned long afs_folio_dirty(struct folio *folio, size_t from, size_t to) 917 { 918 unsigned int res = afs_folio_dirty_resolution(folio); 919 from >>= res; 920 to = (to - 1) >> res; 921 return (to << __AFS_FOLIO_PRIV_SHIFT) | from; 922 } 923 924 static inline unsigned long afs_folio_dirty_mmapped(unsigned long priv) 925 { 926 return priv | __AFS_FOLIO_PRIV_MMAPPED; 927 } 928 929 static inline bool afs_is_folio_dirty_mmapped(unsigned long priv) 930 { 931 return priv & __AFS_FOLIO_PRIV_MMAPPED; 932 } 933 934 #include <trace/events/afs.h> 935 936 /*****************************************************************************/ 937 /* 938 * addr_list.c 939 */ 940 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) 941 { 942 if (alist) 943 refcount_inc(&alist->usage); 944 return alist; 945 } 946 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, 947 unsigned short, 948 unsigned short); 949 extern void afs_put_addrlist(struct afs_addr_list *); 950 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, 951 const char *, size_t, char, 952 unsigned short, unsigned short); 953 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); 954 extern bool afs_iterate_addresses(struct afs_addr_cursor *); 955 extern int afs_end_cursor(struct afs_addr_cursor *); 956 957 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); 958 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); 959 960 /* 961 * cache.c 962 */ 963 #ifdef CONFIG_AFS_FSCACHE 964 extern struct fscache_netfs afs_cache_netfs; 965 extern struct fscache_cookie_def afs_cell_cache_index_def; 966 extern struct fscache_cookie_def afs_volume_cache_index_def; 967 extern struct fscache_cookie_def afs_vnode_cache_index_def; 968 #else 969 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) 970 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) 971 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) 972 #endif 973 974 /* 975 * callback.c 976 */ 977 extern void afs_invalidate_mmap_work(struct work_struct *); 978 extern void afs_server_init_callback_work(struct work_struct *work); 979 extern void afs_init_callback_state(struct afs_server *); 980 extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 981 extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 982 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); 983 984 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) 985 { 986 return vnode->cb_break + vnode->cb_v_break; 987 } 988 989 static inline bool afs_cb_is_broken(unsigned int cb_break, 990 const struct afs_vnode *vnode) 991 { 992 return cb_break != (vnode->cb_break + vnode->volume->cb_v_break); 993 } 994 995 /* 996 * cell.c 997 */ 998 extern int afs_cell_init(struct afs_net *, const char *); 999 extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, 1000 enum afs_cell_trace); 1001 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, 1002 const char *, bool); 1003 extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); 1004 extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace); 1005 extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); 1006 extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); 1007 extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); 1008 extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); 1009 extern void afs_manage_cells(struct work_struct *); 1010 extern void afs_cells_timer(struct timer_list *); 1011 extern void __net_exit afs_cell_purge(struct afs_net *); 1012 1013 /* 1014 * cmservice.c 1015 */ 1016 extern bool afs_cm_incoming_call(struct afs_call *); 1017 1018 /* 1019 * dir.c 1020 */ 1021 extern const struct file_operations afs_dir_file_operations; 1022 extern const struct inode_operations afs_dir_inode_operations; 1023 extern const struct address_space_operations afs_dir_aops; 1024 extern const struct dentry_operations afs_fs_dentry_operations; 1025 1026 extern void afs_d_release(struct dentry *); 1027 extern void afs_check_for_remote_deletion(struct afs_operation *); 1028 1029 /* 1030 * dir_edit.c 1031 */ 1032 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, 1033 enum afs_edit_dir_reason); 1034 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); 1035 1036 /* 1037 * dir_silly.c 1038 */ 1039 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, 1040 struct dentry *, struct key *); 1041 extern int afs_silly_iput(struct dentry *, struct inode *); 1042 1043 /* 1044 * dynroot.c 1045 */ 1046 extern const struct inode_operations afs_dynroot_inode_operations; 1047 extern const struct dentry_operations afs_dynroot_dentry_operations; 1048 1049 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); 1050 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); 1051 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); 1052 extern int afs_dynroot_populate(struct super_block *); 1053 extern void afs_dynroot_depopulate(struct super_block *); 1054 1055 /* 1056 * file.c 1057 */ 1058 extern const struct address_space_operations afs_file_aops; 1059 extern const struct address_space_operations afs_symlink_aops; 1060 extern const struct inode_operations afs_file_inode_operations; 1061 extern const struct file_operations afs_file_operations; 1062 extern const struct netfs_read_request_ops afs_req_ops; 1063 1064 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); 1065 extern void afs_put_wb_key(struct afs_wb_key *); 1066 extern int afs_open(struct inode *, struct file *); 1067 extern int afs_release(struct inode *, struct file *); 1068 extern int afs_fetch_data(struct afs_vnode *, struct afs_read *); 1069 extern struct afs_read *afs_alloc_read(gfp_t); 1070 extern void afs_put_read(struct afs_read *); 1071 1072 static inline struct afs_read *afs_get_read(struct afs_read *req) 1073 { 1074 refcount_inc(&req->usage); 1075 return req; 1076 } 1077 1078 /* 1079 * flock.c 1080 */ 1081 extern struct workqueue_struct *afs_lock_manager; 1082 1083 extern void afs_lock_op_done(struct afs_call *); 1084 extern void afs_lock_work(struct work_struct *); 1085 extern void afs_lock_may_be_available(struct afs_vnode *); 1086 extern int afs_lock(struct file *, int, struct file_lock *); 1087 extern int afs_flock(struct file *, int, struct file_lock *); 1088 1089 /* 1090 * fsclient.c 1091 */ 1092 extern void afs_fs_fetch_status(struct afs_operation *); 1093 extern void afs_fs_fetch_data(struct afs_operation *); 1094 extern void afs_fs_create_file(struct afs_operation *); 1095 extern void afs_fs_make_dir(struct afs_operation *); 1096 extern void afs_fs_remove_file(struct afs_operation *); 1097 extern void afs_fs_remove_dir(struct afs_operation *); 1098 extern void afs_fs_link(struct afs_operation *); 1099 extern void afs_fs_symlink(struct afs_operation *); 1100 extern void afs_fs_rename(struct afs_operation *); 1101 extern void afs_fs_store_data(struct afs_operation *); 1102 extern void afs_fs_setattr(struct afs_operation *); 1103 extern void afs_fs_get_volume_status(struct afs_operation *); 1104 extern void afs_fs_set_lock(struct afs_operation *); 1105 extern void afs_fs_extend_lock(struct afs_operation *); 1106 extern void afs_fs_release_lock(struct afs_operation *); 1107 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, 1108 struct afs_addr_cursor *, struct key *); 1109 extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *, 1110 struct afs_addr_cursor *, struct key *); 1111 extern void afs_fs_inline_bulk_status(struct afs_operation *); 1112 1113 struct afs_acl { 1114 u32 size; 1115 u8 data[]; 1116 }; 1117 1118 extern void afs_fs_fetch_acl(struct afs_operation *); 1119 extern void afs_fs_store_acl(struct afs_operation *); 1120 1121 /* 1122 * fs_operation.c 1123 */ 1124 extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); 1125 extern int afs_put_operation(struct afs_operation *); 1126 extern bool afs_begin_vnode_operation(struct afs_operation *); 1127 extern void afs_wait_for_operation(struct afs_operation *); 1128 extern int afs_do_sync_operation(struct afs_operation *); 1129 1130 static inline void afs_op_nomem(struct afs_operation *op) 1131 { 1132 op->error = -ENOMEM; 1133 } 1134 1135 static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, 1136 struct afs_vnode *vnode) 1137 { 1138 op->file[n].vnode = vnode; 1139 op->file[n].need_io_lock = true; 1140 } 1141 1142 static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, 1143 const struct afs_fid *fid) 1144 { 1145 op->file[n].fid = *fid; 1146 } 1147 1148 /* 1149 * fs_probe.c 1150 */ 1151 extern void afs_fileserver_probe_result(struct afs_call *); 1152 extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool); 1153 extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long); 1154 extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); 1155 extern void afs_fs_probe_dispatcher(struct work_struct *); 1156 extern int afs_wait_for_one_fs_probe(struct afs_server *, bool); 1157 extern void afs_fs_probe_cleanup(struct afs_net *); 1158 1159 /* 1160 * inode.c 1161 */ 1162 extern const struct afs_operation_ops afs_fetch_status_operation; 1163 1164 extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); 1165 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); 1166 extern int afs_ilookup5_test_by_fid(struct inode *, void *); 1167 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); 1168 extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); 1169 extern struct inode *afs_root_iget(struct super_block *, struct key *); 1170 extern bool afs_check_validity(struct afs_vnode *); 1171 extern int afs_validate(struct afs_vnode *, struct key *); 1172 extern int afs_getattr(struct user_namespace *mnt_userns, const struct path *, 1173 struct kstat *, u32, unsigned int); 1174 extern int afs_setattr(struct user_namespace *mnt_userns, struct dentry *, struct iattr *); 1175 extern void afs_evict_inode(struct inode *); 1176 extern int afs_drop_inode(struct inode *); 1177 1178 /* 1179 * main.c 1180 */ 1181 extern struct workqueue_struct *afs_wq; 1182 extern int afs_net_id; 1183 1184 static inline struct afs_net *afs_net(struct net *net) 1185 { 1186 return net_generic(net, afs_net_id); 1187 } 1188 1189 static inline struct afs_net *afs_sb2net(struct super_block *sb) 1190 { 1191 return afs_net(AFS_FS_S(sb)->net_ns); 1192 } 1193 1194 static inline struct afs_net *afs_d2net(struct dentry *dentry) 1195 { 1196 return afs_sb2net(dentry->d_sb); 1197 } 1198 1199 static inline struct afs_net *afs_i2net(struct inode *inode) 1200 { 1201 return afs_sb2net(inode->i_sb); 1202 } 1203 1204 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 1205 { 1206 return afs_i2net(&vnode->vfs_inode); 1207 } 1208 1209 static inline struct afs_net *afs_sock2net(struct sock *sk) 1210 { 1211 return net_generic(sock_net(sk), afs_net_id); 1212 } 1213 1214 static inline void __afs_stat(atomic_t *s) 1215 { 1216 atomic_inc(s); 1217 } 1218 1219 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) 1220 1221 /* 1222 * misc.c 1223 */ 1224 extern int afs_abort_to_error(u32); 1225 extern void afs_prioritise_error(struct afs_error *, int, u32); 1226 1227 /* 1228 * mntpt.c 1229 */ 1230 extern const struct inode_operations afs_mntpt_inode_operations; 1231 extern const struct inode_operations afs_autocell_inode_operations; 1232 extern const struct file_operations afs_mntpt_file_operations; 1233 1234 extern struct vfsmount *afs_d_automount(struct path *); 1235 extern void afs_mntpt_kill_timer(void); 1236 1237 /* 1238 * proc.c 1239 */ 1240 #ifdef CONFIG_PROC_FS 1241 extern int __net_init afs_proc_init(struct afs_net *); 1242 extern void __net_exit afs_proc_cleanup(struct afs_net *); 1243 extern int afs_proc_cell_setup(struct afs_cell *); 1244 extern void afs_proc_cell_remove(struct afs_cell *); 1245 extern void afs_put_sysnames(struct afs_sysnames *); 1246 #else 1247 static inline int afs_proc_init(struct afs_net *net) { return 0; } 1248 static inline void afs_proc_cleanup(struct afs_net *net) {} 1249 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } 1250 static inline void afs_proc_cell_remove(struct afs_cell *cell) {} 1251 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} 1252 #endif 1253 1254 /* 1255 * rotate.c 1256 */ 1257 extern bool afs_select_fileserver(struct afs_operation *); 1258 extern void afs_dump_edestaddrreq(const struct afs_operation *); 1259 1260 /* 1261 * rxrpc.c 1262 */ 1263 extern struct workqueue_struct *afs_async_calls; 1264 1265 extern int __net_init afs_open_socket(struct afs_net *); 1266 extern void __net_exit afs_close_socket(struct afs_net *); 1267 extern void afs_charge_preallocation(struct work_struct *); 1268 extern void afs_put_call(struct afs_call *); 1269 extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t); 1270 extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *); 1271 extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 1272 const struct afs_call_type *, 1273 size_t, size_t); 1274 extern void afs_flat_call_destructor(struct afs_call *); 1275 extern void afs_send_empty_reply(struct afs_call *); 1276 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 1277 extern int afs_extract_data(struct afs_call *, bool); 1278 extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); 1279 1280 static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, 1281 gfp_t gfp) 1282 { 1283 op->call = call; 1284 op->type = call->type; 1285 call->op = op; 1286 call->key = op->key; 1287 call->intr = !(op->flags & AFS_OPERATION_UNINTR); 1288 afs_make_call(&op->ac, call, gfp); 1289 } 1290 1291 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) 1292 { 1293 call->iov_len = size; 1294 call->kvec[0].iov_base = buf; 1295 call->kvec[0].iov_len = size; 1296 iov_iter_kvec(&call->def_iter, READ, call->kvec, 1, size); 1297 } 1298 1299 static inline void afs_extract_to_tmp(struct afs_call *call) 1300 { 1301 call->iov_len = sizeof(call->tmp); 1302 afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); 1303 } 1304 1305 static inline void afs_extract_to_tmp64(struct afs_call *call) 1306 { 1307 call->iov_len = sizeof(call->tmp64); 1308 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); 1309 } 1310 1311 static inline void afs_extract_discard(struct afs_call *call, size_t size) 1312 { 1313 call->iov_len = size; 1314 iov_iter_discard(&call->def_iter, READ, size); 1315 } 1316 1317 static inline void afs_extract_to_buf(struct afs_call *call, size_t size) 1318 { 1319 call->iov_len = size; 1320 afs_extract_begin(call, call->buffer, size); 1321 } 1322 1323 static inline int afs_transfer_reply(struct afs_call *call) 1324 { 1325 return afs_extract_data(call, false); 1326 } 1327 1328 static inline bool afs_check_call_state(struct afs_call *call, 1329 enum afs_call_state state) 1330 { 1331 return READ_ONCE(call->state) == state; 1332 } 1333 1334 static inline bool afs_set_call_state(struct afs_call *call, 1335 enum afs_call_state from, 1336 enum afs_call_state to) 1337 { 1338 bool ok = false; 1339 1340 spin_lock_bh(&call->state_lock); 1341 if (call->state == from) { 1342 call->state = to; 1343 trace_afs_call_state(call, from, to, 0, 0); 1344 ok = true; 1345 } 1346 spin_unlock_bh(&call->state_lock); 1347 return ok; 1348 } 1349 1350 static inline void afs_set_call_complete(struct afs_call *call, 1351 int error, u32 remote_abort) 1352 { 1353 enum afs_call_state state; 1354 bool ok = false; 1355 1356 spin_lock_bh(&call->state_lock); 1357 state = call->state; 1358 if (state != AFS_CALL_COMPLETE) { 1359 call->abort_code = remote_abort; 1360 call->error = error; 1361 call->state = AFS_CALL_COMPLETE; 1362 trace_afs_call_state(call, state, AFS_CALL_COMPLETE, 1363 error, remote_abort); 1364 ok = true; 1365 } 1366 spin_unlock_bh(&call->state_lock); 1367 if (ok) { 1368 trace_afs_call_done(call); 1369 1370 /* Asynchronous calls have two refs to release - one from the alloc and 1371 * one queued with the work item - and we can't just deallocate the 1372 * call because the work item may be queued again. 1373 */ 1374 if (call->drop_ref) 1375 afs_put_call(call); 1376 } 1377 } 1378 1379 /* 1380 * security.c 1381 */ 1382 extern void afs_put_permits(struct afs_permits *); 1383 extern void afs_clear_permits(struct afs_vnode *); 1384 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, 1385 struct afs_status_cb *); 1386 extern void afs_zap_permits(struct rcu_head *); 1387 extern struct key *afs_request_key(struct afs_cell *); 1388 extern struct key *afs_request_key_rcu(struct afs_cell *); 1389 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); 1390 extern int afs_permission(struct user_namespace *, struct inode *, int); 1391 extern void __exit afs_clean_up_permit_cache(void); 1392 1393 /* 1394 * server.c 1395 */ 1396 extern spinlock_t afs_server_peer_lock; 1397 1398 extern struct afs_server *afs_find_server(struct afs_net *, 1399 const struct sockaddr_rxrpc *); 1400 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); 1401 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); 1402 extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); 1403 extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace); 1404 extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1405 extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace); 1406 extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1407 extern void afs_manage_servers(struct work_struct *); 1408 extern void afs_servers_timer(struct timer_list *); 1409 extern void afs_fs_probe_timer(struct timer_list *); 1410 extern void __net_exit afs_purge_servers(struct afs_net *); 1411 extern bool afs_check_server_record(struct afs_operation *, struct afs_server *); 1412 1413 static inline void afs_inc_servers_outstanding(struct afs_net *net) 1414 { 1415 atomic_inc(&net->servers_outstanding); 1416 } 1417 1418 static inline void afs_dec_servers_outstanding(struct afs_net *net) 1419 { 1420 if (atomic_dec_and_test(&net->servers_outstanding)) 1421 wake_up_var(&net->servers_outstanding); 1422 } 1423 1424 static inline bool afs_is_probing_server(struct afs_server *server) 1425 { 1426 return list_empty(&server->probe_link); 1427 } 1428 1429 /* 1430 * server_list.c 1431 */ 1432 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) 1433 { 1434 refcount_inc(&slist->usage); 1435 return slist; 1436 } 1437 1438 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); 1439 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, 1440 struct afs_vldb_entry *, 1441 u8); 1442 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); 1443 1444 /* 1445 * super.c 1446 */ 1447 extern int __init afs_fs_init(void); 1448 extern void afs_fs_exit(void); 1449 1450 /* 1451 * vlclient.c 1452 */ 1453 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, 1454 const char *, int); 1455 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); 1456 extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, 1457 struct key *, struct afs_vlserver *, unsigned int); 1458 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); 1459 extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); 1460 1461 /* 1462 * vl_alias.c 1463 */ 1464 extern int afs_cell_detect_alias(struct afs_cell *, struct key *); 1465 1466 /* 1467 * vl_probe.c 1468 */ 1469 extern void afs_vlserver_probe_result(struct afs_call *); 1470 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); 1471 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); 1472 1473 /* 1474 * vl_rotate.c 1475 */ 1476 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, 1477 struct afs_cell *, struct key *); 1478 extern bool afs_select_vlserver(struct afs_vl_cursor *); 1479 extern bool afs_select_current_vlserver(struct afs_vl_cursor *); 1480 extern int afs_end_vlserver_operation(struct afs_vl_cursor *); 1481 1482 /* 1483 * vlserver_list.c 1484 */ 1485 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) 1486 { 1487 atomic_inc(&vlserver->usage); 1488 return vlserver; 1489 } 1490 1491 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) 1492 { 1493 if (vllist) 1494 atomic_inc(&vllist->usage); 1495 return vllist; 1496 } 1497 1498 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); 1499 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); 1500 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); 1501 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); 1502 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, 1503 const void *, size_t); 1504 1505 /* 1506 * volume.c 1507 */ 1508 extern struct afs_volume *afs_create_volume(struct afs_fs_context *); 1509 extern void afs_activate_volume(struct afs_volume *); 1510 extern void afs_deactivate_volume(struct afs_volume *); 1511 extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); 1512 extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace); 1513 extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); 1514 1515 /* 1516 * write.c 1517 */ 1518 extern int afs_set_page_dirty(struct page *); 1519 extern int afs_write_begin(struct file *file, struct address_space *mapping, 1520 loff_t pos, unsigned len, unsigned flags, 1521 struct page **pagep, void **fsdata); 1522 extern int afs_write_end(struct file *file, struct address_space *mapping, 1523 loff_t pos, unsigned len, unsigned copied, 1524 struct page *page, void *fsdata); 1525 extern int afs_writepage(struct page *, struct writeback_control *); 1526 extern int afs_writepages(struct address_space *, struct writeback_control *); 1527 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); 1528 extern int afs_fsync(struct file *, loff_t, loff_t, int); 1529 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); 1530 extern void afs_prune_wb_keys(struct afs_vnode *); 1531 extern int afs_launder_page(struct page *); 1532 1533 /* 1534 * xattr.c 1535 */ 1536 extern const struct xattr_handler *afs_xattr_handlers[]; 1537 1538 /* 1539 * yfsclient.c 1540 */ 1541 extern void yfs_fs_fetch_data(struct afs_operation *); 1542 extern void yfs_fs_create_file(struct afs_operation *); 1543 extern void yfs_fs_make_dir(struct afs_operation *); 1544 extern void yfs_fs_remove_file2(struct afs_operation *); 1545 extern void yfs_fs_remove_file(struct afs_operation *); 1546 extern void yfs_fs_remove_dir(struct afs_operation *); 1547 extern void yfs_fs_link(struct afs_operation *); 1548 extern void yfs_fs_symlink(struct afs_operation *); 1549 extern void yfs_fs_rename(struct afs_operation *); 1550 extern void yfs_fs_store_data(struct afs_operation *); 1551 extern void yfs_fs_setattr(struct afs_operation *); 1552 extern void yfs_fs_get_volume_status(struct afs_operation *); 1553 extern void yfs_fs_set_lock(struct afs_operation *); 1554 extern void yfs_fs_extend_lock(struct afs_operation *); 1555 extern void yfs_fs_release_lock(struct afs_operation *); 1556 extern void yfs_fs_fetch_status(struct afs_operation *); 1557 extern void yfs_fs_inline_bulk_status(struct afs_operation *); 1558 1559 struct yfs_acl { 1560 struct afs_acl *acl; /* Dir/file/symlink ACL */ 1561 struct afs_acl *vol_acl; /* Whole volume ACL */ 1562 u32 inherit_flag; /* True if ACL is inherited from parent dir */ 1563 u32 num_cleaned; /* Number of ACEs removed due to subject removal */ 1564 unsigned int flags; 1565 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ 1566 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ 1567 }; 1568 1569 extern void yfs_free_opaque_acl(struct yfs_acl *); 1570 extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); 1571 extern void yfs_fs_store_opaque_acl2(struct afs_operation *); 1572 1573 /* 1574 * Miscellaneous inline functions. 1575 */ 1576 static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 1577 { 1578 return container_of(inode, struct afs_vnode, vfs_inode); 1579 } 1580 1581 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 1582 { 1583 return &vnode->vfs_inode; 1584 } 1585 1586 /* 1587 * Note that a dentry got changed. We need to set d_fsdata to the data version 1588 * number derived from the result of the operation. It doesn't matter if 1589 * d_fsdata goes backwards as we'll just revalidate. 1590 */ 1591 static inline void afs_update_dentry_version(struct afs_operation *op, 1592 struct afs_vnode_param *dir_vp, 1593 struct dentry *dentry) 1594 { 1595 if (!op->error) 1596 dentry->d_fsdata = 1597 (void *)(unsigned long)dir_vp->scb.status.data_version; 1598 } 1599 1600 /* 1601 * Set the file size and block count. Estimate the number of 512 bytes blocks 1602 * used, rounded up to nearest 1K for consistency with other AFS clients. 1603 */ 1604 static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size) 1605 { 1606 i_size_write(&vnode->vfs_inode, size); 1607 vnode->vfs_inode.i_blocks = ((size + 1023) >> 10) << 1; 1608 } 1609 1610 /* 1611 * Check for a conflicting operation on a directory that we just unlinked from. 1612 * If someone managed to sneak a link or an unlink in on the file we just 1613 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). 1614 */ 1615 static inline void afs_check_dir_conflict(struct afs_operation *op, 1616 struct afs_vnode_param *dvp) 1617 { 1618 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) 1619 op->flags |= AFS_OPERATION_DIR_CONFLICT; 1620 } 1621 1622 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) 1623 { 1624 trace_afs_io_error(call->debug_id, -EIO, where); 1625 return -EIO; 1626 } 1627 1628 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) 1629 { 1630 trace_afs_file_error(vnode, -EIO, where); 1631 return -EIO; 1632 } 1633 1634 /*****************************************************************************/ 1635 /* 1636 * debug tracing 1637 */ 1638 extern unsigned afs_debug; 1639 1640 #define dbgprintk(FMT,...) \ 1641 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1642 1643 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1644 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1645 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1646 1647 1648 #if defined(__KDEBUG) 1649 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1650 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1651 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1652 1653 #elif defined(CONFIG_AFS_DEBUG) 1654 #define AFS_DEBUG_KENTER 0x01 1655 #define AFS_DEBUG_KLEAVE 0x02 1656 #define AFS_DEBUG_KDEBUG 0x04 1657 1658 #define _enter(FMT,...) \ 1659 do { \ 1660 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 1661 kenter(FMT,##__VA_ARGS__); \ 1662 } while (0) 1663 1664 #define _leave(FMT,...) \ 1665 do { \ 1666 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 1667 kleave(FMT,##__VA_ARGS__); \ 1668 } while (0) 1669 1670 #define _debug(FMT,...) \ 1671 do { \ 1672 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 1673 kdebug(FMT,##__VA_ARGS__); \ 1674 } while (0) 1675 1676 #else 1677 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1678 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1679 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1680 #endif 1681 1682 /* 1683 * debug assertion checking 1684 */ 1685 #if 1 // defined(__KDEBUGALL) 1686 1687 #define ASSERT(X) \ 1688 do { \ 1689 if (unlikely(!(X))) { \ 1690 printk(KERN_ERR "\n"); \ 1691 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1692 BUG(); \ 1693 } \ 1694 } while(0) 1695 1696 #define ASSERTCMP(X, OP, Y) \ 1697 do { \ 1698 if (unlikely(!((X) OP (Y)))) { \ 1699 printk(KERN_ERR "\n"); \ 1700 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1701 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1702 (unsigned long)(X), (unsigned long)(Y)); \ 1703 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1704 (unsigned long)(X), (unsigned long)(Y)); \ 1705 BUG(); \ 1706 } \ 1707 } while(0) 1708 1709 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1710 do { \ 1711 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 1712 printk(KERN_ERR "\n"); \ 1713 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1714 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 1715 (unsigned long)(L), (unsigned long)(N), \ 1716 (unsigned long)(H)); \ 1717 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 1718 (unsigned long)(L), (unsigned long)(N), \ 1719 (unsigned long)(H)); \ 1720 BUG(); \ 1721 } \ 1722 } while(0) 1723 1724 #define ASSERTIF(C, X) \ 1725 do { \ 1726 if (unlikely((C) && !(X))) { \ 1727 printk(KERN_ERR "\n"); \ 1728 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1729 BUG(); \ 1730 } \ 1731 } while(0) 1732 1733 #define ASSERTIFCMP(C, X, OP, Y) \ 1734 do { \ 1735 if (unlikely((C) && !((X) OP (Y)))) { \ 1736 printk(KERN_ERR "\n"); \ 1737 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1738 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1739 (unsigned long)(X), (unsigned long)(Y)); \ 1740 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1741 (unsigned long)(X), (unsigned long)(Y)); \ 1742 BUG(); \ 1743 } \ 1744 } while(0) 1745 1746 #else 1747 1748 #define ASSERT(X) \ 1749 do { \ 1750 } while(0) 1751 1752 #define ASSERTCMP(X, OP, Y) \ 1753 do { \ 1754 } while(0) 1755 1756 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1757 do { \ 1758 } while(0) 1759 1760 #define ASSERTIF(C, X) \ 1761 do { \ 1762 } while(0) 1763 1764 #define ASSERTIFCMP(C, X, OP, Y) \ 1765 do { \ 1766 } while(0) 1767 1768 #endif /* __KDEBUGALL */ 1769