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 */ 393 394 /* VL server list. */ 395 rwlock_t vl_servers_lock; /* Lock on vl_servers */ 396 struct afs_vlserver_list __rcu *vl_servers; 397 398 u8 name_len; /* Length of name */ 399 char *name; /* Cell name, case-flattened and NUL-padded */ 400 }; 401 402 /* 403 * Volume Location server record. 404 */ 405 struct afs_vlserver { 406 struct rcu_head rcu; 407 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */ 408 unsigned long flags; 409 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ 410 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ 411 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ 412 #define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */ 413 rwlock_t lock; /* Lock on addresses */ 414 atomic_t usage; 415 unsigned int rtt; /* Server's current RTT in uS */ 416 417 /* Probe state */ 418 wait_queue_head_t probe_wq; 419 atomic_t probe_outstanding; 420 spinlock_t probe_lock; 421 struct { 422 unsigned int rtt; /* RTT in uS */ 423 u32 abort_code; 424 short error; 425 unsigned short flags; 426 #define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */ 427 #define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */ 428 #define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */ 429 #define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */ 430 } probe; 431 432 u16 port; 433 u16 name_len; /* Length of name */ 434 char name[]; /* Server name, case-flattened */ 435 }; 436 437 /* 438 * Weighted list of Volume Location servers. 439 */ 440 struct afs_vlserver_entry { 441 u16 priority; /* Preference (as SRV) */ 442 u16 weight; /* Weight (as SRV) */ 443 enum dns_record_source source:8; 444 enum dns_lookup_status status:8; 445 struct afs_vlserver *server; 446 }; 447 448 struct afs_vlserver_list { 449 struct rcu_head rcu; 450 atomic_t usage; 451 u8 nr_servers; 452 u8 index; /* Server currently in use */ 453 u8 preferred; /* Preferred server */ 454 enum dns_record_source source:8; 455 enum dns_lookup_status status:8; 456 rwlock_t lock; 457 struct afs_vlserver_entry servers[]; 458 }; 459 460 /* 461 * Cached VLDB entry. 462 * 463 * This is pointed to by cell->vldb_entries, indexed by name. 464 */ 465 struct afs_vldb_entry { 466 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ 467 468 unsigned long flags; 469 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ 470 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ 471 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ 472 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ 473 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ 474 475 uuid_t fs_server[AFS_NMAXNSERVERS]; 476 u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */ 477 u8 fs_mask[AFS_NMAXNSERVERS]; 478 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 479 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 480 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 481 short error; 482 u8 nr_servers; /* Number of server records */ 483 u8 name_len; 484 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 485 }; 486 487 /* 488 * Record of fileserver with which we're actively communicating. 489 */ 490 struct afs_server { 491 struct rcu_head rcu; 492 union { 493 uuid_t uuid; /* Server ID */ 494 struct afs_uuid _uuid; 495 }; 496 497 struct afs_addr_list __rcu *addresses; 498 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 499 struct rb_node uuid_rb; /* Link in net->fs_servers */ 500 struct afs_server __rcu *uuid_next; /* Next server with same UUID */ 501 struct afs_server *uuid_prev; /* Previous server with same UUID */ 502 struct list_head probe_link; /* Link in net->fs_probe_list */ 503 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ 504 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ 505 struct hlist_node proc_link; /* Link in net->fs_proc */ 506 struct afs_server *gc_next; /* Next server in manager's list */ 507 time64_t unuse_time; /* Time at which last unused */ 508 unsigned long flags; 509 #define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */ 510 #define AFS_SERVER_FL_UPDATING 1 511 #define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */ 512 #define AFS_SERVER_FL_NOT_READY 4 /* The record is not ready for use */ 513 #define AFS_SERVER_FL_NOT_FOUND 5 /* VL server says no such server */ 514 #define AFS_SERVER_FL_VL_FAIL 6 /* Failed to access VL server */ 515 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ 516 #define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */ 517 #define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */ 518 #define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */ 519 atomic_t ref; /* Object refcount */ 520 atomic_t active; /* Active user count */ 521 u32 addr_version; /* Address list version */ 522 unsigned int rtt; /* Server's current RTT in uS */ 523 unsigned int debug_id; /* Debugging ID for traces */ 524 525 /* file service access */ 526 rwlock_t fs_lock; /* access lock */ 527 528 /* callback promise management */ 529 unsigned cb_s_break; /* Break-everything counter. */ 530 531 /* Probe state */ 532 unsigned long probed_at; /* Time last probe was dispatched (jiffies) */ 533 wait_queue_head_t probe_wq; 534 atomic_t probe_outstanding; 535 spinlock_t probe_lock; 536 struct { 537 unsigned int rtt; /* RTT in uS */ 538 u32 abort_code; 539 short error; 540 bool responded:1; 541 bool is_yfs:1; 542 bool not_yfs:1; 543 bool local_failure:1; 544 } probe; 545 }; 546 547 /* 548 * Replaceable volume server list. 549 */ 550 struct afs_server_entry { 551 struct afs_server *server; 552 }; 553 554 struct afs_server_list { 555 afs_volid_t vids[AFS_MAXTYPES]; /* Volume IDs */ 556 refcount_t usage; 557 unsigned char nr_servers; 558 unsigned char preferred; /* Preferred server */ 559 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ 560 unsigned int seq; /* Set to ->servers_seq when installed */ 561 rwlock_t lock; 562 struct afs_server_entry servers[]; 563 }; 564 565 /* 566 * Live AFS volume management. 567 */ 568 struct afs_volume { 569 union { 570 struct rcu_head rcu; 571 afs_volid_t vid; /* volume ID */ 572 }; 573 atomic_t usage; 574 time64_t update_at; /* Time at which to next update */ 575 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 576 struct rb_node cell_node; /* Link in cell->volumes */ 577 struct hlist_node proc_link; /* Link in cell->proc_volumes */ 578 struct super_block __rcu *sb; /* Superblock on which inodes reside */ 579 unsigned long flags; 580 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ 581 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ 582 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ 583 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ 584 #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ 585 #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ 586 #define AFS_VOLUME_MAYBE_NO_IBULK 6 /* - T if some servers don't have InlineBulkStatus */ 587 #ifdef CONFIG_AFS_FSCACHE 588 struct fscache_cookie *cache; /* caching cookie */ 589 #endif 590 struct afs_server_list __rcu *servers; /* List of servers on which volume resides */ 591 rwlock_t servers_lock; /* Lock for ->servers */ 592 unsigned int servers_seq; /* Incremented each time ->servers changes */ 593 594 unsigned cb_v_break; /* Break-everything counter. */ 595 rwlock_t cb_v_break_lock; 596 597 afs_voltype_t type; /* type of volume */ 598 char type_force; /* force volume type (suppress R/O -> R/W) */ 599 u8 name_len; 600 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 601 }; 602 603 enum afs_lock_state { 604 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ 605 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ 606 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ 607 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ 608 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ 609 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ 610 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ 611 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */ 612 }; 613 614 /* 615 * AFS inode private data. 616 * 617 * Note that afs_alloc_inode() *must* reset anything that could incorrectly 618 * leak from one inode to another. 619 */ 620 struct afs_vnode { 621 struct inode vfs_inode; /* the VFS's inode record */ 622 623 struct afs_volume *volume; /* volume on which vnode resides */ 624 struct afs_fid fid; /* the file identifier for this inode */ 625 struct afs_file_status status; /* AFS status info for this file */ 626 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ 627 #ifdef CONFIG_AFS_FSCACHE 628 struct fscache_cookie *cache; /* caching cookie */ 629 #endif 630 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ 631 struct mutex io_lock; /* Lock for serialising I/O on this mutex */ 632 struct rw_semaphore validate_lock; /* lock for validating this vnode */ 633 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ 634 struct key *silly_key; /* Silly rename key */ 635 spinlock_t wb_lock; /* lock for wb_keys */ 636 spinlock_t lock; /* waitqueue/flags lock */ 637 unsigned long flags; 638 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ 639 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 640 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ 641 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 642 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 643 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 644 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ 645 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ 646 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ 647 #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */ 648 649 struct list_head wb_keys; /* List of keys available for writeback */ 650 struct list_head pending_locks; /* locks waiting to be granted */ 651 struct list_head granted_locks; /* locks granted on this file */ 652 struct delayed_work lock_work; /* work to be done in locking */ 653 struct key *lock_key; /* Key to be used in lock ops */ 654 ktime_t locked_at; /* Time at which lock obtained */ 655 enum afs_lock_state lock_state : 8; 656 afs_lock_type_t lock_type : 8; 657 658 /* outstanding callback notification on this file */ 659 void *cb_server; /* Server with callback/filelock */ 660 unsigned int cb_s_break; /* Mass break counter on ->server */ 661 unsigned int cb_v_break; /* Mass break counter on ->volume */ 662 unsigned int cb_break; /* Break counter on vnode */ 663 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ 664 665 time64_t cb_expires_at; /* time at which callback expires */ 666 }; 667 668 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) 669 { 670 #ifdef CONFIG_AFS_FSCACHE 671 return vnode->cache; 672 #else 673 return NULL; 674 #endif 675 } 676 677 /* 678 * cached security record for one user's attempt to access a vnode 679 */ 680 struct afs_permit { 681 struct key *key; /* RxRPC ticket holding a security context */ 682 afs_access_t access; /* CallerAccess value for this key */ 683 }; 684 685 /* 686 * Immutable cache of CallerAccess records from attempts to access vnodes. 687 * These may be shared between multiple vnodes. 688 */ 689 struct afs_permits { 690 struct rcu_head rcu; 691 struct hlist_node hash_node; /* Link in hash */ 692 unsigned long h; /* Hash value for this permit list */ 693 refcount_t usage; 694 unsigned short nr_permits; /* Number of records */ 695 bool invalidated; /* Invalidated due to key change */ 696 struct afs_permit permits[]; /* List of permits sorted by key pointer */ 697 }; 698 699 /* 700 * Error prioritisation and accumulation. 701 */ 702 struct afs_error { 703 short error; /* Accumulated error */ 704 bool responded; /* T if server responded */ 705 }; 706 707 /* 708 * Cursor for iterating over a server's address list. 709 */ 710 struct afs_addr_cursor { 711 struct afs_addr_list *alist; /* Current address list (pins ref) */ 712 unsigned long tried; /* Tried addresses */ 713 signed char index; /* Current address */ 714 bool responded; /* T if the current address responded */ 715 unsigned short nr_iterations; /* Number of address iterations */ 716 short error; 717 u32 abort_code; 718 }; 719 720 /* 721 * Cursor for iterating over a set of volume location servers. 722 */ 723 struct afs_vl_cursor { 724 struct afs_addr_cursor ac; 725 struct afs_cell *cell; /* The cell we're querying */ 726 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ 727 struct afs_vlserver *server; /* Server on which this resides */ 728 struct key *key; /* Key for the server */ 729 unsigned long untried; /* Bitmask of untried servers */ 730 short index; /* Current server */ 731 short error; 732 unsigned short flags; 733 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ 734 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ 735 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ 736 unsigned short nr_iterations; /* Number of server iterations */ 737 }; 738 739 /* 740 * Fileserver operation methods. 741 */ 742 struct afs_operation_ops { 743 void (*issue_afs_rpc)(struct afs_operation *op); 744 void (*issue_yfs_rpc)(struct afs_operation *op); 745 void (*success)(struct afs_operation *op); 746 void (*aborted)(struct afs_operation *op); 747 void (*failed)(struct afs_operation *op); 748 void (*edit_dir)(struct afs_operation *op); 749 void (*put)(struct afs_operation *op); 750 }; 751 752 struct afs_vnode_param { 753 struct afs_vnode *vnode; 754 struct afs_fid fid; /* Fid to access */ 755 struct afs_status_cb scb; /* Returned status and callback promise */ 756 afs_dataversion_t dv_before; /* Data version before the call */ 757 unsigned int cb_break_before; /* cb_break + cb_s_break before the call */ 758 u8 dv_delta; /* Expected change in data version */ 759 bool put_vnode:1; /* T if we have a ref on the vnode */ 760 bool need_io_lock:1; /* T if we need the I/O lock on this */ 761 bool update_ctime:1; /* Need to update the ctime */ 762 bool set_size:1; /* Must update i_size */ 763 bool op_unlinked:1; /* True if file was unlinked by op */ 764 bool speculative:1; /* T if speculative status fetch (no vnode lock) */ 765 }; 766 767 /* 768 * Fileserver operation wrapper, handling server and address rotation 769 * asynchronously. May make simultaneous calls to multiple servers. 770 */ 771 struct afs_operation { 772 struct afs_net *net; /* Network namespace */ 773 struct key *key; /* Key for the cell */ 774 const struct afs_call_type *type; /* Type of call done */ 775 const struct afs_operation_ops *ops; 776 777 /* Parameters/results for the operation */ 778 struct afs_volume *volume; /* Volume being accessed */ 779 struct afs_vnode_param file[2]; 780 struct afs_vnode_param *more_files; 781 struct afs_volsync volsync; 782 struct dentry *dentry; /* Dentry to be altered */ 783 struct dentry *dentry_2; /* Second dentry to be altered */ 784 struct timespec64 mtime; /* Modification time to record */ 785 struct timespec64 ctime; /* Change time to set */ 786 short nr_files; /* Number of entries in file[], more_files */ 787 short error; 788 unsigned int debug_id; 789 790 unsigned int cb_v_break; /* Volume break counter before op */ 791 unsigned int cb_s_break; /* Server break counter before op */ 792 793 union { 794 struct { 795 int which; /* Which ->file[] to fetch for */ 796 } fetch_status; 797 struct { 798 int reason; /* enum afs_edit_dir_reason */ 799 mode_t mode; 800 const char *symlink; 801 } create; 802 struct { 803 bool need_rehash; 804 } unlink; 805 struct { 806 struct dentry *rehash; 807 struct dentry *tmp; 808 bool new_negative; 809 } rename; 810 struct { 811 struct afs_read *req; 812 } fetch; 813 struct { 814 afs_lock_type_t type; 815 } lock; 816 struct { 817 struct iov_iter *write_iter; 818 loff_t pos; 819 loff_t size; 820 loff_t i_size; 821 bool laundering; /* Laundering page, PG_writeback not set */ 822 } store; 823 struct { 824 struct iattr *attr; 825 loff_t old_i_size; 826 } setattr; 827 struct afs_acl *acl; 828 struct yfs_acl *yacl; 829 struct { 830 struct afs_volume_status vs; 831 struct kstatfs *buf; 832 } volstatus; 833 }; 834 835 /* Fileserver iteration state */ 836 struct afs_addr_cursor ac; 837 struct afs_server_list *server_list; /* Current server list (pins ref) */ 838 struct afs_server *server; /* Server we're using (ref pinned by server_list) */ 839 struct afs_call *call; 840 unsigned long untried; /* Bitmask of untried servers */ 841 short index; /* Current server */ 842 unsigned short nr_iterations; /* Number of server iterations */ 843 844 unsigned int flags; 845 #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ 846 #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ 847 #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ 848 #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ 849 #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ 850 #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ 851 #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ 852 #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ 853 #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ 854 #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ 855 #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ 856 #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ 857 #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ 858 }; 859 860 /* 861 * Cache auxiliary data. 862 */ 863 struct afs_vnode_cache_aux { 864 u64 data_version; 865 } __packed; 866 867 /* 868 * We use page->private to hold the amount of the page that we've written to, 869 * splitting the field into two parts. However, we need to represent a range 870 * 0...PAGE_SIZE, so we reduce the resolution if the size of the page 871 * exceeds what we can encode. 872 */ 873 #ifdef CONFIG_64BIT 874 #define __AFS_PAGE_PRIV_MASK 0x7fffffffUL 875 #define __AFS_PAGE_PRIV_SHIFT 32 876 #define __AFS_PAGE_PRIV_MMAPPED 0x80000000UL 877 #else 878 #define __AFS_PAGE_PRIV_MASK 0x7fffUL 879 #define __AFS_PAGE_PRIV_SHIFT 16 880 #define __AFS_PAGE_PRIV_MMAPPED 0x8000UL 881 #endif 882 883 static inline unsigned int afs_page_dirty_resolution(struct page *page) 884 { 885 int shift = thp_order(page) + PAGE_SHIFT - (__AFS_PAGE_PRIV_SHIFT - 1); 886 return (shift > 0) ? shift : 0; 887 } 888 889 static inline size_t afs_page_dirty_from(struct page *page, unsigned long priv) 890 { 891 unsigned long x = priv & __AFS_PAGE_PRIV_MASK; 892 893 /* The lower bound is inclusive */ 894 return x << afs_page_dirty_resolution(page); 895 } 896 897 static inline size_t afs_page_dirty_to(struct page *page, unsigned long priv) 898 { 899 unsigned long x = (priv >> __AFS_PAGE_PRIV_SHIFT) & __AFS_PAGE_PRIV_MASK; 900 901 /* The upper bound is immediately beyond the region */ 902 return (x + 1) << afs_page_dirty_resolution(page); 903 } 904 905 static inline unsigned long afs_page_dirty(struct page *page, size_t from, size_t to) 906 { 907 unsigned int res = afs_page_dirty_resolution(page); 908 from >>= res; 909 to = (to - 1) >> res; 910 return (to << __AFS_PAGE_PRIV_SHIFT) | from; 911 } 912 913 static inline unsigned long afs_page_dirty_mmapped(unsigned long priv) 914 { 915 return priv | __AFS_PAGE_PRIV_MMAPPED; 916 } 917 918 static inline bool afs_is_page_dirty_mmapped(unsigned long priv) 919 { 920 return priv & __AFS_PAGE_PRIV_MMAPPED; 921 } 922 923 #include <trace/events/afs.h> 924 925 /*****************************************************************************/ 926 /* 927 * addr_list.c 928 */ 929 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) 930 { 931 if (alist) 932 refcount_inc(&alist->usage); 933 return alist; 934 } 935 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, 936 unsigned short, 937 unsigned short); 938 extern void afs_put_addrlist(struct afs_addr_list *); 939 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, 940 const char *, size_t, char, 941 unsigned short, unsigned short); 942 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); 943 extern bool afs_iterate_addresses(struct afs_addr_cursor *); 944 extern int afs_end_cursor(struct afs_addr_cursor *); 945 946 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); 947 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); 948 949 /* 950 * cache.c 951 */ 952 #ifdef CONFIG_AFS_FSCACHE 953 extern struct fscache_netfs afs_cache_netfs; 954 extern struct fscache_cookie_def afs_cell_cache_index_def; 955 extern struct fscache_cookie_def afs_volume_cache_index_def; 956 extern struct fscache_cookie_def afs_vnode_cache_index_def; 957 #else 958 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) 959 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) 960 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) 961 #endif 962 963 /* 964 * callback.c 965 */ 966 extern void afs_init_callback_state(struct afs_server *); 967 extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 968 extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 969 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); 970 971 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) 972 { 973 return vnode->cb_break + vnode->cb_v_break; 974 } 975 976 static inline bool afs_cb_is_broken(unsigned int cb_break, 977 const struct afs_vnode *vnode) 978 { 979 return cb_break != (vnode->cb_break + vnode->volume->cb_v_break); 980 } 981 982 /* 983 * cell.c 984 */ 985 extern int afs_cell_init(struct afs_net *, const char *); 986 extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, 987 enum afs_cell_trace); 988 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, 989 const char *, bool); 990 extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); 991 extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace); 992 extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); 993 extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); 994 extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); 995 extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); 996 extern void afs_manage_cells(struct work_struct *); 997 extern void afs_cells_timer(struct timer_list *); 998 extern void __net_exit afs_cell_purge(struct afs_net *); 999 1000 /* 1001 * cmservice.c 1002 */ 1003 extern bool afs_cm_incoming_call(struct afs_call *); 1004 1005 /* 1006 * dir.c 1007 */ 1008 extern const struct file_operations afs_dir_file_operations; 1009 extern const struct inode_operations afs_dir_inode_operations; 1010 extern const struct address_space_operations afs_dir_aops; 1011 extern const struct dentry_operations afs_fs_dentry_operations; 1012 1013 extern void afs_d_release(struct dentry *); 1014 extern void afs_check_for_remote_deletion(struct afs_operation *); 1015 1016 /* 1017 * dir_edit.c 1018 */ 1019 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, 1020 enum afs_edit_dir_reason); 1021 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); 1022 1023 /* 1024 * dir_silly.c 1025 */ 1026 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, 1027 struct dentry *, struct key *); 1028 extern int afs_silly_iput(struct dentry *, struct inode *); 1029 1030 /* 1031 * dynroot.c 1032 */ 1033 extern const struct inode_operations afs_dynroot_inode_operations; 1034 extern const struct dentry_operations afs_dynroot_dentry_operations; 1035 1036 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); 1037 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); 1038 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); 1039 extern int afs_dynroot_populate(struct super_block *); 1040 extern void afs_dynroot_depopulate(struct super_block *); 1041 1042 /* 1043 * file.c 1044 */ 1045 extern const struct address_space_operations afs_fs_aops; 1046 extern const struct inode_operations afs_file_inode_operations; 1047 extern const struct file_operations afs_file_operations; 1048 extern const struct netfs_read_request_ops afs_req_ops; 1049 1050 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); 1051 extern void afs_put_wb_key(struct afs_wb_key *); 1052 extern int afs_open(struct inode *, struct file *); 1053 extern int afs_release(struct inode *, struct file *); 1054 extern int afs_fetch_data(struct afs_vnode *, struct afs_read *); 1055 extern struct afs_read *afs_alloc_read(gfp_t); 1056 extern void afs_put_read(struct afs_read *); 1057 1058 static inline struct afs_read *afs_get_read(struct afs_read *req) 1059 { 1060 refcount_inc(&req->usage); 1061 return req; 1062 } 1063 1064 /* 1065 * flock.c 1066 */ 1067 extern struct workqueue_struct *afs_lock_manager; 1068 1069 extern void afs_lock_op_done(struct afs_call *); 1070 extern void afs_lock_work(struct work_struct *); 1071 extern void afs_lock_may_be_available(struct afs_vnode *); 1072 extern int afs_lock(struct file *, int, struct file_lock *); 1073 extern int afs_flock(struct file *, int, struct file_lock *); 1074 1075 /* 1076 * fsclient.c 1077 */ 1078 extern void afs_fs_fetch_status(struct afs_operation *); 1079 extern void afs_fs_fetch_data(struct afs_operation *); 1080 extern void afs_fs_create_file(struct afs_operation *); 1081 extern void afs_fs_make_dir(struct afs_operation *); 1082 extern void afs_fs_remove_file(struct afs_operation *); 1083 extern void afs_fs_remove_dir(struct afs_operation *); 1084 extern void afs_fs_link(struct afs_operation *); 1085 extern void afs_fs_symlink(struct afs_operation *); 1086 extern void afs_fs_rename(struct afs_operation *); 1087 extern void afs_fs_store_data(struct afs_operation *); 1088 extern void afs_fs_setattr(struct afs_operation *); 1089 extern void afs_fs_get_volume_status(struct afs_operation *); 1090 extern void afs_fs_set_lock(struct afs_operation *); 1091 extern void afs_fs_extend_lock(struct afs_operation *); 1092 extern void afs_fs_release_lock(struct afs_operation *); 1093 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, 1094 struct afs_addr_cursor *, struct key *); 1095 extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *, 1096 struct afs_addr_cursor *, struct key *); 1097 extern void afs_fs_inline_bulk_status(struct afs_operation *); 1098 1099 struct afs_acl { 1100 u32 size; 1101 u8 data[]; 1102 }; 1103 1104 extern void afs_fs_fetch_acl(struct afs_operation *); 1105 extern void afs_fs_store_acl(struct afs_operation *); 1106 1107 /* 1108 * fs_operation.c 1109 */ 1110 extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); 1111 extern int afs_put_operation(struct afs_operation *); 1112 extern bool afs_begin_vnode_operation(struct afs_operation *); 1113 extern void afs_wait_for_operation(struct afs_operation *); 1114 extern int afs_do_sync_operation(struct afs_operation *); 1115 1116 static inline void afs_op_nomem(struct afs_operation *op) 1117 { 1118 op->error = -ENOMEM; 1119 } 1120 1121 static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, 1122 struct afs_vnode *vnode) 1123 { 1124 op->file[n].vnode = vnode; 1125 op->file[n].need_io_lock = true; 1126 } 1127 1128 static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, 1129 const struct afs_fid *fid) 1130 { 1131 op->file[n].fid = *fid; 1132 } 1133 1134 /* 1135 * fs_probe.c 1136 */ 1137 extern void afs_fileserver_probe_result(struct afs_call *); 1138 extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool); 1139 extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long); 1140 extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); 1141 extern void afs_fs_probe_dispatcher(struct work_struct *); 1142 extern int afs_wait_for_one_fs_probe(struct afs_server *, bool); 1143 extern void afs_fs_probe_cleanup(struct afs_net *); 1144 1145 /* 1146 * inode.c 1147 */ 1148 extern const struct afs_operation_ops afs_fetch_status_operation; 1149 1150 extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); 1151 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); 1152 extern int afs_ilookup5_test_by_fid(struct inode *, void *); 1153 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); 1154 extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); 1155 extern struct inode *afs_root_iget(struct super_block *, struct key *); 1156 extern bool afs_check_validity(struct afs_vnode *); 1157 extern int afs_validate(struct afs_vnode *, struct key *); 1158 extern int afs_getattr(struct user_namespace *mnt_userns, const struct path *, 1159 struct kstat *, u32, unsigned int); 1160 extern int afs_setattr(struct user_namespace *mnt_userns, struct dentry *, struct iattr *); 1161 extern void afs_evict_inode(struct inode *); 1162 extern int afs_drop_inode(struct inode *); 1163 1164 /* 1165 * main.c 1166 */ 1167 extern struct workqueue_struct *afs_wq; 1168 extern int afs_net_id; 1169 1170 static inline struct afs_net *afs_net(struct net *net) 1171 { 1172 return net_generic(net, afs_net_id); 1173 } 1174 1175 static inline struct afs_net *afs_sb2net(struct super_block *sb) 1176 { 1177 return afs_net(AFS_FS_S(sb)->net_ns); 1178 } 1179 1180 static inline struct afs_net *afs_d2net(struct dentry *dentry) 1181 { 1182 return afs_sb2net(dentry->d_sb); 1183 } 1184 1185 static inline struct afs_net *afs_i2net(struct inode *inode) 1186 { 1187 return afs_sb2net(inode->i_sb); 1188 } 1189 1190 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 1191 { 1192 return afs_i2net(&vnode->vfs_inode); 1193 } 1194 1195 static inline struct afs_net *afs_sock2net(struct sock *sk) 1196 { 1197 return net_generic(sock_net(sk), afs_net_id); 1198 } 1199 1200 static inline void __afs_stat(atomic_t *s) 1201 { 1202 atomic_inc(s); 1203 } 1204 1205 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) 1206 1207 /* 1208 * misc.c 1209 */ 1210 extern int afs_abort_to_error(u32); 1211 extern void afs_prioritise_error(struct afs_error *, int, u32); 1212 1213 /* 1214 * mntpt.c 1215 */ 1216 extern const struct inode_operations afs_mntpt_inode_operations; 1217 extern const struct inode_operations afs_autocell_inode_operations; 1218 extern const struct file_operations afs_mntpt_file_operations; 1219 1220 extern struct vfsmount *afs_d_automount(struct path *); 1221 extern void afs_mntpt_kill_timer(void); 1222 1223 /* 1224 * proc.c 1225 */ 1226 #ifdef CONFIG_PROC_FS 1227 extern int __net_init afs_proc_init(struct afs_net *); 1228 extern void __net_exit afs_proc_cleanup(struct afs_net *); 1229 extern int afs_proc_cell_setup(struct afs_cell *); 1230 extern void afs_proc_cell_remove(struct afs_cell *); 1231 extern void afs_put_sysnames(struct afs_sysnames *); 1232 #else 1233 static inline int afs_proc_init(struct afs_net *net) { return 0; } 1234 static inline void afs_proc_cleanup(struct afs_net *net) {} 1235 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } 1236 static inline void afs_proc_cell_remove(struct afs_cell *cell) {} 1237 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} 1238 #endif 1239 1240 /* 1241 * rotate.c 1242 */ 1243 extern bool afs_select_fileserver(struct afs_operation *); 1244 extern void afs_dump_edestaddrreq(const struct afs_operation *); 1245 1246 /* 1247 * rxrpc.c 1248 */ 1249 extern struct workqueue_struct *afs_async_calls; 1250 1251 extern int __net_init afs_open_socket(struct afs_net *); 1252 extern void __net_exit afs_close_socket(struct afs_net *); 1253 extern void afs_charge_preallocation(struct work_struct *); 1254 extern void afs_put_call(struct afs_call *); 1255 extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t); 1256 extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *); 1257 extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 1258 const struct afs_call_type *, 1259 size_t, size_t); 1260 extern void afs_flat_call_destructor(struct afs_call *); 1261 extern void afs_send_empty_reply(struct afs_call *); 1262 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 1263 extern int afs_extract_data(struct afs_call *, bool); 1264 extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); 1265 1266 static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, 1267 gfp_t gfp) 1268 { 1269 op->call = call; 1270 op->type = call->type; 1271 call->op = op; 1272 call->key = op->key; 1273 call->intr = !(op->flags & AFS_OPERATION_UNINTR); 1274 afs_make_call(&op->ac, call, gfp); 1275 } 1276 1277 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) 1278 { 1279 call->iov_len = size; 1280 call->kvec[0].iov_base = buf; 1281 call->kvec[0].iov_len = size; 1282 iov_iter_kvec(&call->def_iter, READ, call->kvec, 1, size); 1283 } 1284 1285 static inline void afs_extract_to_tmp(struct afs_call *call) 1286 { 1287 call->iov_len = sizeof(call->tmp); 1288 afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); 1289 } 1290 1291 static inline void afs_extract_to_tmp64(struct afs_call *call) 1292 { 1293 call->iov_len = sizeof(call->tmp64); 1294 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); 1295 } 1296 1297 static inline void afs_extract_discard(struct afs_call *call, size_t size) 1298 { 1299 call->iov_len = size; 1300 iov_iter_discard(&call->def_iter, READ, size); 1301 } 1302 1303 static inline void afs_extract_to_buf(struct afs_call *call, size_t size) 1304 { 1305 call->iov_len = size; 1306 afs_extract_begin(call, call->buffer, size); 1307 } 1308 1309 static inline int afs_transfer_reply(struct afs_call *call) 1310 { 1311 return afs_extract_data(call, false); 1312 } 1313 1314 static inline bool afs_check_call_state(struct afs_call *call, 1315 enum afs_call_state state) 1316 { 1317 return READ_ONCE(call->state) == state; 1318 } 1319 1320 static inline bool afs_set_call_state(struct afs_call *call, 1321 enum afs_call_state from, 1322 enum afs_call_state to) 1323 { 1324 bool ok = false; 1325 1326 spin_lock_bh(&call->state_lock); 1327 if (call->state == from) { 1328 call->state = to; 1329 trace_afs_call_state(call, from, to, 0, 0); 1330 ok = true; 1331 } 1332 spin_unlock_bh(&call->state_lock); 1333 return ok; 1334 } 1335 1336 static inline void afs_set_call_complete(struct afs_call *call, 1337 int error, u32 remote_abort) 1338 { 1339 enum afs_call_state state; 1340 bool ok = false; 1341 1342 spin_lock_bh(&call->state_lock); 1343 state = call->state; 1344 if (state != AFS_CALL_COMPLETE) { 1345 call->abort_code = remote_abort; 1346 call->error = error; 1347 call->state = AFS_CALL_COMPLETE; 1348 trace_afs_call_state(call, state, AFS_CALL_COMPLETE, 1349 error, remote_abort); 1350 ok = true; 1351 } 1352 spin_unlock_bh(&call->state_lock); 1353 if (ok) { 1354 trace_afs_call_done(call); 1355 1356 /* Asynchronous calls have two refs to release - one from the alloc and 1357 * one queued with the work item - and we can't just deallocate the 1358 * call because the work item may be queued again. 1359 */ 1360 if (call->drop_ref) 1361 afs_put_call(call); 1362 } 1363 } 1364 1365 /* 1366 * security.c 1367 */ 1368 extern void afs_put_permits(struct afs_permits *); 1369 extern void afs_clear_permits(struct afs_vnode *); 1370 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, 1371 struct afs_status_cb *); 1372 extern void afs_zap_permits(struct rcu_head *); 1373 extern struct key *afs_request_key(struct afs_cell *); 1374 extern struct key *afs_request_key_rcu(struct afs_cell *); 1375 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); 1376 extern int afs_permission(struct user_namespace *, struct inode *, int); 1377 extern void __exit afs_clean_up_permit_cache(void); 1378 1379 /* 1380 * server.c 1381 */ 1382 extern spinlock_t afs_server_peer_lock; 1383 1384 extern struct afs_server *afs_find_server(struct afs_net *, 1385 const struct sockaddr_rxrpc *); 1386 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); 1387 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); 1388 extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); 1389 extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace); 1390 extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1391 extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace); 1392 extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1393 extern void afs_manage_servers(struct work_struct *); 1394 extern void afs_servers_timer(struct timer_list *); 1395 extern void afs_fs_probe_timer(struct timer_list *); 1396 extern void __net_exit afs_purge_servers(struct afs_net *); 1397 extern bool afs_check_server_record(struct afs_operation *, struct afs_server *); 1398 1399 static inline void afs_inc_servers_outstanding(struct afs_net *net) 1400 { 1401 atomic_inc(&net->servers_outstanding); 1402 } 1403 1404 static inline void afs_dec_servers_outstanding(struct afs_net *net) 1405 { 1406 if (atomic_dec_and_test(&net->servers_outstanding)) 1407 wake_up_var(&net->servers_outstanding); 1408 } 1409 1410 static inline bool afs_is_probing_server(struct afs_server *server) 1411 { 1412 return list_empty(&server->probe_link); 1413 } 1414 1415 /* 1416 * server_list.c 1417 */ 1418 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) 1419 { 1420 refcount_inc(&slist->usage); 1421 return slist; 1422 } 1423 1424 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); 1425 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, 1426 struct afs_vldb_entry *, 1427 u8); 1428 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); 1429 1430 /* 1431 * super.c 1432 */ 1433 extern int __init afs_fs_init(void); 1434 extern void afs_fs_exit(void); 1435 1436 /* 1437 * vlclient.c 1438 */ 1439 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, 1440 const char *, int); 1441 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); 1442 extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, 1443 struct key *, struct afs_vlserver *, unsigned int); 1444 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); 1445 extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); 1446 1447 /* 1448 * vl_alias.c 1449 */ 1450 extern int afs_cell_detect_alias(struct afs_cell *, struct key *); 1451 1452 /* 1453 * vl_probe.c 1454 */ 1455 extern void afs_vlserver_probe_result(struct afs_call *); 1456 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); 1457 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); 1458 1459 /* 1460 * vl_rotate.c 1461 */ 1462 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, 1463 struct afs_cell *, struct key *); 1464 extern bool afs_select_vlserver(struct afs_vl_cursor *); 1465 extern bool afs_select_current_vlserver(struct afs_vl_cursor *); 1466 extern int afs_end_vlserver_operation(struct afs_vl_cursor *); 1467 1468 /* 1469 * vlserver_list.c 1470 */ 1471 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) 1472 { 1473 atomic_inc(&vlserver->usage); 1474 return vlserver; 1475 } 1476 1477 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) 1478 { 1479 if (vllist) 1480 atomic_inc(&vllist->usage); 1481 return vllist; 1482 } 1483 1484 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); 1485 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); 1486 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); 1487 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); 1488 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, 1489 const void *, size_t); 1490 1491 /* 1492 * volume.c 1493 */ 1494 extern struct afs_volume *afs_create_volume(struct afs_fs_context *); 1495 extern void afs_activate_volume(struct afs_volume *); 1496 extern void afs_deactivate_volume(struct afs_volume *); 1497 extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); 1498 extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace); 1499 extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); 1500 1501 /* 1502 * write.c 1503 */ 1504 extern int afs_set_page_dirty(struct page *); 1505 extern int afs_write_begin(struct file *file, struct address_space *mapping, 1506 loff_t pos, unsigned len, unsigned flags, 1507 struct page **pagep, void **fsdata); 1508 extern int afs_write_end(struct file *file, struct address_space *mapping, 1509 loff_t pos, unsigned len, unsigned copied, 1510 struct page *page, void *fsdata); 1511 extern int afs_writepage(struct page *, struct writeback_control *); 1512 extern int afs_writepages(struct address_space *, struct writeback_control *); 1513 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); 1514 extern int afs_fsync(struct file *, loff_t, loff_t, int); 1515 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); 1516 extern void afs_prune_wb_keys(struct afs_vnode *); 1517 extern int afs_launder_page(struct page *); 1518 1519 /* 1520 * xattr.c 1521 */ 1522 extern const struct xattr_handler *afs_xattr_handlers[]; 1523 1524 /* 1525 * yfsclient.c 1526 */ 1527 extern void yfs_fs_fetch_data(struct afs_operation *); 1528 extern void yfs_fs_create_file(struct afs_operation *); 1529 extern void yfs_fs_make_dir(struct afs_operation *); 1530 extern void yfs_fs_remove_file2(struct afs_operation *); 1531 extern void yfs_fs_remove_file(struct afs_operation *); 1532 extern void yfs_fs_remove_dir(struct afs_operation *); 1533 extern void yfs_fs_link(struct afs_operation *); 1534 extern void yfs_fs_symlink(struct afs_operation *); 1535 extern void yfs_fs_rename(struct afs_operation *); 1536 extern void yfs_fs_store_data(struct afs_operation *); 1537 extern void yfs_fs_setattr(struct afs_operation *); 1538 extern void yfs_fs_get_volume_status(struct afs_operation *); 1539 extern void yfs_fs_set_lock(struct afs_operation *); 1540 extern void yfs_fs_extend_lock(struct afs_operation *); 1541 extern void yfs_fs_release_lock(struct afs_operation *); 1542 extern void yfs_fs_fetch_status(struct afs_operation *); 1543 extern void yfs_fs_inline_bulk_status(struct afs_operation *); 1544 1545 struct yfs_acl { 1546 struct afs_acl *acl; /* Dir/file/symlink ACL */ 1547 struct afs_acl *vol_acl; /* Whole volume ACL */ 1548 u32 inherit_flag; /* True if ACL is inherited from parent dir */ 1549 u32 num_cleaned; /* Number of ACEs removed due to subject removal */ 1550 unsigned int flags; 1551 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ 1552 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ 1553 }; 1554 1555 extern void yfs_free_opaque_acl(struct yfs_acl *); 1556 extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); 1557 extern void yfs_fs_store_opaque_acl2(struct afs_operation *); 1558 1559 /* 1560 * Miscellaneous inline functions. 1561 */ 1562 static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 1563 { 1564 return container_of(inode, struct afs_vnode, vfs_inode); 1565 } 1566 1567 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 1568 { 1569 return &vnode->vfs_inode; 1570 } 1571 1572 /* 1573 * Note that a dentry got changed. We need to set d_fsdata to the data version 1574 * number derived from the result of the operation. It doesn't matter if 1575 * d_fsdata goes backwards as we'll just revalidate. 1576 */ 1577 static inline void afs_update_dentry_version(struct afs_operation *op, 1578 struct afs_vnode_param *dir_vp, 1579 struct dentry *dentry) 1580 { 1581 if (!op->error) 1582 dentry->d_fsdata = 1583 (void *)(unsigned long)dir_vp->scb.status.data_version; 1584 } 1585 1586 /* 1587 * Check for a conflicting operation on a directory that we just unlinked from. 1588 * If someone managed to sneak a link or an unlink in on the file we just 1589 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). 1590 */ 1591 static inline void afs_check_dir_conflict(struct afs_operation *op, 1592 struct afs_vnode_param *dvp) 1593 { 1594 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) 1595 op->flags |= AFS_OPERATION_DIR_CONFLICT; 1596 } 1597 1598 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) 1599 { 1600 trace_afs_io_error(call->debug_id, -EIO, where); 1601 return -EIO; 1602 } 1603 1604 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) 1605 { 1606 trace_afs_file_error(vnode, -EIO, where); 1607 return -EIO; 1608 } 1609 1610 /*****************************************************************************/ 1611 /* 1612 * debug tracing 1613 */ 1614 extern unsigned afs_debug; 1615 1616 #define dbgprintk(FMT,...) \ 1617 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1618 1619 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1620 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1621 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1622 1623 1624 #if defined(__KDEBUG) 1625 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1626 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1627 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1628 1629 #elif defined(CONFIG_AFS_DEBUG) 1630 #define AFS_DEBUG_KENTER 0x01 1631 #define AFS_DEBUG_KLEAVE 0x02 1632 #define AFS_DEBUG_KDEBUG 0x04 1633 1634 #define _enter(FMT,...) \ 1635 do { \ 1636 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 1637 kenter(FMT,##__VA_ARGS__); \ 1638 } while (0) 1639 1640 #define _leave(FMT,...) \ 1641 do { \ 1642 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 1643 kleave(FMT,##__VA_ARGS__); \ 1644 } while (0) 1645 1646 #define _debug(FMT,...) \ 1647 do { \ 1648 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 1649 kdebug(FMT,##__VA_ARGS__); \ 1650 } while (0) 1651 1652 #else 1653 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1654 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1655 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1656 #endif 1657 1658 /* 1659 * debug assertion checking 1660 */ 1661 #if 1 // defined(__KDEBUGALL) 1662 1663 #define ASSERT(X) \ 1664 do { \ 1665 if (unlikely(!(X))) { \ 1666 printk(KERN_ERR "\n"); \ 1667 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1668 BUG(); \ 1669 } \ 1670 } while(0) 1671 1672 #define ASSERTCMP(X, OP, Y) \ 1673 do { \ 1674 if (unlikely(!((X) OP (Y)))) { \ 1675 printk(KERN_ERR "\n"); \ 1676 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1677 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1678 (unsigned long)(X), (unsigned long)(Y)); \ 1679 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1680 (unsigned long)(X), (unsigned long)(Y)); \ 1681 BUG(); \ 1682 } \ 1683 } while(0) 1684 1685 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1686 do { \ 1687 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 1688 printk(KERN_ERR "\n"); \ 1689 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1690 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 1691 (unsigned long)(L), (unsigned long)(N), \ 1692 (unsigned long)(H)); \ 1693 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 1694 (unsigned long)(L), (unsigned long)(N), \ 1695 (unsigned long)(H)); \ 1696 BUG(); \ 1697 } \ 1698 } while(0) 1699 1700 #define ASSERTIF(C, X) \ 1701 do { \ 1702 if (unlikely((C) && !(X))) { \ 1703 printk(KERN_ERR "\n"); \ 1704 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1705 BUG(); \ 1706 } \ 1707 } while(0) 1708 1709 #define ASSERTIFCMP(C, X, OP, Y) \ 1710 do { \ 1711 if (unlikely((C) && !((X) OP (Y)))) { \ 1712 printk(KERN_ERR "\n"); \ 1713 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1714 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1715 (unsigned long)(X), (unsigned long)(Y)); \ 1716 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1717 (unsigned long)(X), (unsigned long)(Y)); \ 1718 BUG(); \ 1719 } \ 1720 } while(0) 1721 1722 #else 1723 1724 #define ASSERT(X) \ 1725 do { \ 1726 } while(0) 1727 1728 #define ASSERTCMP(X, OP, Y) \ 1729 do { \ 1730 } while(0) 1731 1732 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1733 do { \ 1734 } while(0) 1735 1736 #define ASSERTIF(C, X) \ 1737 do { \ 1738 } while(0) 1739 1740 #define ASSERTIFCMP(C, X, OP, Y) \ 1741 do { \ 1742 } while(0) 1743 1744 #endif /* __KDEBUGALL */ 1745