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 #define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */ 649 650 struct list_head wb_keys; /* List of keys available for writeback */ 651 struct list_head pending_locks; /* locks waiting to be granted */ 652 struct list_head granted_locks; /* locks granted on this file */ 653 struct delayed_work lock_work; /* work to be done in locking */ 654 struct key *lock_key; /* Key to be used in lock ops */ 655 ktime_t locked_at; /* Time at which lock obtained */ 656 enum afs_lock_state lock_state : 8; 657 afs_lock_type_t lock_type : 8; 658 659 /* outstanding callback notification on this file */ 660 void *cb_server; /* Server with callback/filelock */ 661 unsigned int cb_s_break; /* Mass break counter on ->server */ 662 unsigned int cb_v_break; /* Mass break counter on ->volume */ 663 unsigned int cb_break; /* Break counter on vnode */ 664 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ 665 666 time64_t cb_expires_at; /* time at which callback expires */ 667 }; 668 669 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) 670 { 671 #ifdef CONFIG_AFS_FSCACHE 672 return vnode->cache; 673 #else 674 return NULL; 675 #endif 676 } 677 678 /* 679 * cached security record for one user's attempt to access a vnode 680 */ 681 struct afs_permit { 682 struct key *key; /* RxRPC ticket holding a security context */ 683 afs_access_t access; /* CallerAccess value for this key */ 684 }; 685 686 /* 687 * Immutable cache of CallerAccess records from attempts to access vnodes. 688 * These may be shared between multiple vnodes. 689 */ 690 struct afs_permits { 691 struct rcu_head rcu; 692 struct hlist_node hash_node; /* Link in hash */ 693 unsigned long h; /* Hash value for this permit list */ 694 refcount_t usage; 695 unsigned short nr_permits; /* Number of records */ 696 bool invalidated; /* Invalidated due to key change */ 697 struct afs_permit permits[]; /* List of permits sorted by key pointer */ 698 }; 699 700 /* 701 * Error prioritisation and accumulation. 702 */ 703 struct afs_error { 704 short error; /* Accumulated error */ 705 bool responded; /* T if server responded */ 706 }; 707 708 /* 709 * Cursor for iterating over a server's address list. 710 */ 711 struct afs_addr_cursor { 712 struct afs_addr_list *alist; /* Current address list (pins ref) */ 713 unsigned long tried; /* Tried addresses */ 714 signed char index; /* Current address */ 715 bool responded; /* T if the current address responded */ 716 unsigned short nr_iterations; /* Number of address iterations */ 717 short error; 718 u32 abort_code; 719 }; 720 721 /* 722 * Cursor for iterating over a set of volume location servers. 723 */ 724 struct afs_vl_cursor { 725 struct afs_addr_cursor ac; 726 struct afs_cell *cell; /* The cell we're querying */ 727 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ 728 struct afs_vlserver *server; /* Server on which this resides */ 729 struct key *key; /* Key for the server */ 730 unsigned long untried; /* Bitmask of untried servers */ 731 short index; /* Current server */ 732 short error; 733 unsigned short flags; 734 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ 735 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ 736 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ 737 unsigned short nr_iterations; /* Number of server iterations */ 738 }; 739 740 /* 741 * Fileserver operation methods. 742 */ 743 struct afs_operation_ops { 744 void (*issue_afs_rpc)(struct afs_operation *op); 745 void (*issue_yfs_rpc)(struct afs_operation *op); 746 void (*success)(struct afs_operation *op); 747 void (*aborted)(struct afs_operation *op); 748 void (*failed)(struct afs_operation *op); 749 void (*edit_dir)(struct afs_operation *op); 750 void (*put)(struct afs_operation *op); 751 }; 752 753 struct afs_vnode_param { 754 struct afs_vnode *vnode; 755 struct afs_fid fid; /* Fid to access */ 756 struct afs_status_cb scb; /* Returned status and callback promise */ 757 afs_dataversion_t dv_before; /* Data version before the call */ 758 unsigned int cb_break_before; /* cb_break + cb_s_break before the call */ 759 u8 dv_delta; /* Expected change in data version */ 760 bool put_vnode:1; /* T if we have a ref on the vnode */ 761 bool need_io_lock:1; /* T if we need the I/O lock on this */ 762 bool update_ctime:1; /* Need to update the ctime */ 763 bool set_size:1; /* Must update i_size */ 764 bool op_unlinked:1; /* True if file was unlinked by op */ 765 bool speculative:1; /* T if speculative status fetch (no vnode lock) */ 766 bool modification:1; /* Set if the content gets modified */ 767 }; 768 769 /* 770 * Fileserver operation wrapper, handling server and address rotation 771 * asynchronously. May make simultaneous calls to multiple servers. 772 */ 773 struct afs_operation { 774 struct afs_net *net; /* Network namespace */ 775 struct key *key; /* Key for the cell */ 776 const struct afs_call_type *type; /* Type of call done */ 777 const struct afs_operation_ops *ops; 778 779 /* Parameters/results for the operation */ 780 struct afs_volume *volume; /* Volume being accessed */ 781 struct afs_vnode_param file[2]; 782 struct afs_vnode_param *more_files; 783 struct afs_volsync volsync; 784 struct dentry *dentry; /* Dentry to be altered */ 785 struct dentry *dentry_2; /* Second dentry to be altered */ 786 struct timespec64 mtime; /* Modification time to record */ 787 struct timespec64 ctime; /* Change time to set */ 788 short nr_files; /* Number of entries in file[], more_files */ 789 short error; 790 unsigned int debug_id; 791 792 unsigned int cb_v_break; /* Volume break counter before op */ 793 unsigned int cb_s_break; /* Server break counter before op */ 794 795 union { 796 struct { 797 int which; /* Which ->file[] to fetch for */ 798 } fetch_status; 799 struct { 800 int reason; /* enum afs_edit_dir_reason */ 801 mode_t mode; 802 const char *symlink; 803 } create; 804 struct { 805 bool need_rehash; 806 } unlink; 807 struct { 808 struct dentry *rehash; 809 struct dentry *tmp; 810 bool new_negative; 811 } rename; 812 struct { 813 struct afs_read *req; 814 } fetch; 815 struct { 816 afs_lock_type_t type; 817 } lock; 818 struct { 819 struct iov_iter *write_iter; 820 loff_t pos; 821 loff_t size; 822 loff_t i_size; 823 bool laundering; /* Laundering page, PG_writeback not set */ 824 } store; 825 struct { 826 struct iattr *attr; 827 loff_t old_i_size; 828 } setattr; 829 struct afs_acl *acl; 830 struct yfs_acl *yacl; 831 struct { 832 struct afs_volume_status vs; 833 struct kstatfs *buf; 834 } volstatus; 835 }; 836 837 /* Fileserver iteration state */ 838 struct afs_addr_cursor ac; 839 struct afs_server_list *server_list; /* Current server list (pins ref) */ 840 struct afs_server *server; /* Server we're using (ref pinned by server_list) */ 841 struct afs_call *call; 842 unsigned long untried; /* Bitmask of untried servers */ 843 short index; /* Current server */ 844 unsigned short nr_iterations; /* Number of server iterations */ 845 846 unsigned int flags; 847 #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ 848 #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ 849 #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ 850 #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ 851 #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ 852 #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ 853 #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ 854 #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ 855 #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ 856 #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ 857 #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ 858 #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ 859 #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ 860 }; 861 862 /* 863 * Cache auxiliary data. 864 */ 865 struct afs_vnode_cache_aux { 866 u64 data_version; 867 } __packed; 868 869 /* 870 * We use page->private to hold the amount of the page that we've written to, 871 * splitting the field into two parts. However, we need to represent a range 872 * 0...PAGE_SIZE, so we reduce the resolution if the size of the page 873 * exceeds what we can encode. 874 */ 875 #ifdef CONFIG_64BIT 876 #define __AFS_PAGE_PRIV_MASK 0x7fffffffUL 877 #define __AFS_PAGE_PRIV_SHIFT 32 878 #define __AFS_PAGE_PRIV_MMAPPED 0x80000000UL 879 #else 880 #define __AFS_PAGE_PRIV_MASK 0x7fffUL 881 #define __AFS_PAGE_PRIV_SHIFT 16 882 #define __AFS_PAGE_PRIV_MMAPPED 0x8000UL 883 #endif 884 885 static inline unsigned int afs_page_dirty_resolution(struct page *page) 886 { 887 int shift = thp_order(page) + PAGE_SHIFT - (__AFS_PAGE_PRIV_SHIFT - 1); 888 return (shift > 0) ? shift : 0; 889 } 890 891 static inline size_t afs_page_dirty_from(struct page *page, unsigned long priv) 892 { 893 unsigned long x = priv & __AFS_PAGE_PRIV_MASK; 894 895 /* The lower bound is inclusive */ 896 return x << afs_page_dirty_resolution(page); 897 } 898 899 static inline size_t afs_page_dirty_to(struct page *page, unsigned long priv) 900 { 901 unsigned long x = (priv >> __AFS_PAGE_PRIV_SHIFT) & __AFS_PAGE_PRIV_MASK; 902 903 /* The upper bound is immediately beyond the region */ 904 return (x + 1) << afs_page_dirty_resolution(page); 905 } 906 907 static inline unsigned long afs_page_dirty(struct page *page, size_t from, size_t to) 908 { 909 unsigned int res = afs_page_dirty_resolution(page); 910 from >>= res; 911 to = (to - 1) >> res; 912 return (to << __AFS_PAGE_PRIV_SHIFT) | from; 913 } 914 915 static inline unsigned long afs_page_dirty_mmapped(unsigned long priv) 916 { 917 return priv | __AFS_PAGE_PRIV_MMAPPED; 918 } 919 920 static inline bool afs_is_page_dirty_mmapped(unsigned long priv) 921 { 922 return priv & __AFS_PAGE_PRIV_MMAPPED; 923 } 924 925 #include <trace/events/afs.h> 926 927 /*****************************************************************************/ 928 /* 929 * addr_list.c 930 */ 931 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) 932 { 933 if (alist) 934 refcount_inc(&alist->usage); 935 return alist; 936 } 937 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, 938 unsigned short, 939 unsigned short); 940 extern void afs_put_addrlist(struct afs_addr_list *); 941 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, 942 const char *, size_t, char, 943 unsigned short, unsigned short); 944 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); 945 extern bool afs_iterate_addresses(struct afs_addr_cursor *); 946 extern int afs_end_cursor(struct afs_addr_cursor *); 947 948 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); 949 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); 950 951 /* 952 * cache.c 953 */ 954 #ifdef CONFIG_AFS_FSCACHE 955 extern struct fscache_netfs afs_cache_netfs; 956 extern struct fscache_cookie_def afs_cell_cache_index_def; 957 extern struct fscache_cookie_def afs_volume_cache_index_def; 958 extern struct fscache_cookie_def afs_vnode_cache_index_def; 959 #else 960 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) 961 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) 962 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) 963 #endif 964 965 /* 966 * callback.c 967 */ 968 extern void afs_init_callback_state(struct afs_server *); 969 extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 970 extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 971 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); 972 973 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) 974 { 975 return vnode->cb_break + vnode->cb_v_break; 976 } 977 978 static inline bool afs_cb_is_broken(unsigned int cb_break, 979 const struct afs_vnode *vnode) 980 { 981 return cb_break != (vnode->cb_break + vnode->volume->cb_v_break); 982 } 983 984 /* 985 * cell.c 986 */ 987 extern int afs_cell_init(struct afs_net *, const char *); 988 extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, 989 enum afs_cell_trace); 990 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, 991 const char *, bool); 992 extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); 993 extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace); 994 extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); 995 extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); 996 extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); 997 extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); 998 extern void afs_manage_cells(struct work_struct *); 999 extern void afs_cells_timer(struct timer_list *); 1000 extern void __net_exit afs_cell_purge(struct afs_net *); 1001 1002 /* 1003 * cmservice.c 1004 */ 1005 extern bool afs_cm_incoming_call(struct afs_call *); 1006 1007 /* 1008 * dir.c 1009 */ 1010 extern const struct file_operations afs_dir_file_operations; 1011 extern const struct inode_operations afs_dir_inode_operations; 1012 extern const struct address_space_operations afs_dir_aops; 1013 extern const struct dentry_operations afs_fs_dentry_operations; 1014 1015 extern void afs_d_release(struct dentry *); 1016 extern void afs_check_for_remote_deletion(struct afs_operation *); 1017 1018 /* 1019 * dir_edit.c 1020 */ 1021 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, 1022 enum afs_edit_dir_reason); 1023 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); 1024 1025 /* 1026 * dir_silly.c 1027 */ 1028 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, 1029 struct dentry *, struct key *); 1030 extern int afs_silly_iput(struct dentry *, struct inode *); 1031 1032 /* 1033 * dynroot.c 1034 */ 1035 extern const struct inode_operations afs_dynroot_inode_operations; 1036 extern const struct dentry_operations afs_dynroot_dentry_operations; 1037 1038 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); 1039 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); 1040 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); 1041 extern int afs_dynroot_populate(struct super_block *); 1042 extern void afs_dynroot_depopulate(struct super_block *); 1043 1044 /* 1045 * file.c 1046 */ 1047 extern const struct address_space_operations afs_fs_aops; 1048 extern const struct inode_operations afs_file_inode_operations; 1049 extern const struct file_operations afs_file_operations; 1050 extern const struct netfs_read_request_ops afs_req_ops; 1051 1052 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); 1053 extern void afs_put_wb_key(struct afs_wb_key *); 1054 extern int afs_open(struct inode *, struct file *); 1055 extern int afs_release(struct inode *, struct file *); 1056 extern int afs_fetch_data(struct afs_vnode *, struct afs_read *); 1057 extern struct afs_read *afs_alloc_read(gfp_t); 1058 extern void afs_put_read(struct afs_read *); 1059 1060 static inline struct afs_read *afs_get_read(struct afs_read *req) 1061 { 1062 refcount_inc(&req->usage); 1063 return req; 1064 } 1065 1066 /* 1067 * flock.c 1068 */ 1069 extern struct workqueue_struct *afs_lock_manager; 1070 1071 extern void afs_lock_op_done(struct afs_call *); 1072 extern void afs_lock_work(struct work_struct *); 1073 extern void afs_lock_may_be_available(struct afs_vnode *); 1074 extern int afs_lock(struct file *, int, struct file_lock *); 1075 extern int afs_flock(struct file *, int, struct file_lock *); 1076 1077 /* 1078 * fsclient.c 1079 */ 1080 extern void afs_fs_fetch_status(struct afs_operation *); 1081 extern void afs_fs_fetch_data(struct afs_operation *); 1082 extern void afs_fs_create_file(struct afs_operation *); 1083 extern void afs_fs_make_dir(struct afs_operation *); 1084 extern void afs_fs_remove_file(struct afs_operation *); 1085 extern void afs_fs_remove_dir(struct afs_operation *); 1086 extern void afs_fs_link(struct afs_operation *); 1087 extern void afs_fs_symlink(struct afs_operation *); 1088 extern void afs_fs_rename(struct afs_operation *); 1089 extern void afs_fs_store_data(struct afs_operation *); 1090 extern void afs_fs_setattr(struct afs_operation *); 1091 extern void afs_fs_get_volume_status(struct afs_operation *); 1092 extern void afs_fs_set_lock(struct afs_operation *); 1093 extern void afs_fs_extend_lock(struct afs_operation *); 1094 extern void afs_fs_release_lock(struct afs_operation *); 1095 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, 1096 struct afs_addr_cursor *, struct key *); 1097 extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *, 1098 struct afs_addr_cursor *, struct key *); 1099 extern void afs_fs_inline_bulk_status(struct afs_operation *); 1100 1101 struct afs_acl { 1102 u32 size; 1103 u8 data[]; 1104 }; 1105 1106 extern void afs_fs_fetch_acl(struct afs_operation *); 1107 extern void afs_fs_store_acl(struct afs_operation *); 1108 1109 /* 1110 * fs_operation.c 1111 */ 1112 extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); 1113 extern int afs_put_operation(struct afs_operation *); 1114 extern bool afs_begin_vnode_operation(struct afs_operation *); 1115 extern void afs_wait_for_operation(struct afs_operation *); 1116 extern int afs_do_sync_operation(struct afs_operation *); 1117 1118 static inline void afs_op_nomem(struct afs_operation *op) 1119 { 1120 op->error = -ENOMEM; 1121 } 1122 1123 static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, 1124 struct afs_vnode *vnode) 1125 { 1126 op->file[n].vnode = vnode; 1127 op->file[n].need_io_lock = true; 1128 } 1129 1130 static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, 1131 const struct afs_fid *fid) 1132 { 1133 op->file[n].fid = *fid; 1134 } 1135 1136 /* 1137 * fs_probe.c 1138 */ 1139 extern void afs_fileserver_probe_result(struct afs_call *); 1140 extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool); 1141 extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long); 1142 extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); 1143 extern void afs_fs_probe_dispatcher(struct work_struct *); 1144 extern int afs_wait_for_one_fs_probe(struct afs_server *, bool); 1145 extern void afs_fs_probe_cleanup(struct afs_net *); 1146 1147 /* 1148 * inode.c 1149 */ 1150 extern const struct afs_operation_ops afs_fetch_status_operation; 1151 1152 extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); 1153 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); 1154 extern int afs_ilookup5_test_by_fid(struct inode *, void *); 1155 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); 1156 extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); 1157 extern struct inode *afs_root_iget(struct super_block *, struct key *); 1158 extern bool afs_check_validity(struct afs_vnode *); 1159 extern int afs_validate(struct afs_vnode *, struct key *); 1160 extern int afs_getattr(struct user_namespace *mnt_userns, const struct path *, 1161 struct kstat *, u32, unsigned int); 1162 extern int afs_setattr(struct user_namespace *mnt_userns, struct dentry *, struct iattr *); 1163 extern void afs_evict_inode(struct inode *); 1164 extern int afs_drop_inode(struct inode *); 1165 1166 /* 1167 * main.c 1168 */ 1169 extern struct workqueue_struct *afs_wq; 1170 extern int afs_net_id; 1171 1172 static inline struct afs_net *afs_net(struct net *net) 1173 { 1174 return net_generic(net, afs_net_id); 1175 } 1176 1177 static inline struct afs_net *afs_sb2net(struct super_block *sb) 1178 { 1179 return afs_net(AFS_FS_S(sb)->net_ns); 1180 } 1181 1182 static inline struct afs_net *afs_d2net(struct dentry *dentry) 1183 { 1184 return afs_sb2net(dentry->d_sb); 1185 } 1186 1187 static inline struct afs_net *afs_i2net(struct inode *inode) 1188 { 1189 return afs_sb2net(inode->i_sb); 1190 } 1191 1192 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 1193 { 1194 return afs_i2net(&vnode->vfs_inode); 1195 } 1196 1197 static inline struct afs_net *afs_sock2net(struct sock *sk) 1198 { 1199 return net_generic(sock_net(sk), afs_net_id); 1200 } 1201 1202 static inline void __afs_stat(atomic_t *s) 1203 { 1204 atomic_inc(s); 1205 } 1206 1207 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) 1208 1209 /* 1210 * misc.c 1211 */ 1212 extern int afs_abort_to_error(u32); 1213 extern void afs_prioritise_error(struct afs_error *, int, u32); 1214 1215 /* 1216 * mntpt.c 1217 */ 1218 extern const struct inode_operations afs_mntpt_inode_operations; 1219 extern const struct inode_operations afs_autocell_inode_operations; 1220 extern const struct file_operations afs_mntpt_file_operations; 1221 1222 extern struct vfsmount *afs_d_automount(struct path *); 1223 extern void afs_mntpt_kill_timer(void); 1224 1225 /* 1226 * proc.c 1227 */ 1228 #ifdef CONFIG_PROC_FS 1229 extern int __net_init afs_proc_init(struct afs_net *); 1230 extern void __net_exit afs_proc_cleanup(struct afs_net *); 1231 extern int afs_proc_cell_setup(struct afs_cell *); 1232 extern void afs_proc_cell_remove(struct afs_cell *); 1233 extern void afs_put_sysnames(struct afs_sysnames *); 1234 #else 1235 static inline int afs_proc_init(struct afs_net *net) { return 0; } 1236 static inline void afs_proc_cleanup(struct afs_net *net) {} 1237 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } 1238 static inline void afs_proc_cell_remove(struct afs_cell *cell) {} 1239 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} 1240 #endif 1241 1242 /* 1243 * rotate.c 1244 */ 1245 extern bool afs_select_fileserver(struct afs_operation *); 1246 extern void afs_dump_edestaddrreq(const struct afs_operation *); 1247 1248 /* 1249 * rxrpc.c 1250 */ 1251 extern struct workqueue_struct *afs_async_calls; 1252 1253 extern int __net_init afs_open_socket(struct afs_net *); 1254 extern void __net_exit afs_close_socket(struct afs_net *); 1255 extern void afs_charge_preallocation(struct work_struct *); 1256 extern void afs_put_call(struct afs_call *); 1257 extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t); 1258 extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *); 1259 extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 1260 const struct afs_call_type *, 1261 size_t, size_t); 1262 extern void afs_flat_call_destructor(struct afs_call *); 1263 extern void afs_send_empty_reply(struct afs_call *); 1264 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 1265 extern int afs_extract_data(struct afs_call *, bool); 1266 extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); 1267 1268 static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, 1269 gfp_t gfp) 1270 { 1271 op->call = call; 1272 op->type = call->type; 1273 call->op = op; 1274 call->key = op->key; 1275 call->intr = !(op->flags & AFS_OPERATION_UNINTR); 1276 afs_make_call(&op->ac, call, gfp); 1277 } 1278 1279 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) 1280 { 1281 call->iov_len = size; 1282 call->kvec[0].iov_base = buf; 1283 call->kvec[0].iov_len = size; 1284 iov_iter_kvec(&call->def_iter, READ, call->kvec, 1, size); 1285 } 1286 1287 static inline void afs_extract_to_tmp(struct afs_call *call) 1288 { 1289 call->iov_len = sizeof(call->tmp); 1290 afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); 1291 } 1292 1293 static inline void afs_extract_to_tmp64(struct afs_call *call) 1294 { 1295 call->iov_len = sizeof(call->tmp64); 1296 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); 1297 } 1298 1299 static inline void afs_extract_discard(struct afs_call *call, size_t size) 1300 { 1301 call->iov_len = size; 1302 iov_iter_discard(&call->def_iter, READ, size); 1303 } 1304 1305 static inline void afs_extract_to_buf(struct afs_call *call, size_t size) 1306 { 1307 call->iov_len = size; 1308 afs_extract_begin(call, call->buffer, size); 1309 } 1310 1311 static inline int afs_transfer_reply(struct afs_call *call) 1312 { 1313 return afs_extract_data(call, false); 1314 } 1315 1316 static inline bool afs_check_call_state(struct afs_call *call, 1317 enum afs_call_state state) 1318 { 1319 return READ_ONCE(call->state) == state; 1320 } 1321 1322 static inline bool afs_set_call_state(struct afs_call *call, 1323 enum afs_call_state from, 1324 enum afs_call_state to) 1325 { 1326 bool ok = false; 1327 1328 spin_lock_bh(&call->state_lock); 1329 if (call->state == from) { 1330 call->state = to; 1331 trace_afs_call_state(call, from, to, 0, 0); 1332 ok = true; 1333 } 1334 spin_unlock_bh(&call->state_lock); 1335 return ok; 1336 } 1337 1338 static inline void afs_set_call_complete(struct afs_call *call, 1339 int error, u32 remote_abort) 1340 { 1341 enum afs_call_state state; 1342 bool ok = false; 1343 1344 spin_lock_bh(&call->state_lock); 1345 state = call->state; 1346 if (state != AFS_CALL_COMPLETE) { 1347 call->abort_code = remote_abort; 1348 call->error = error; 1349 call->state = AFS_CALL_COMPLETE; 1350 trace_afs_call_state(call, state, AFS_CALL_COMPLETE, 1351 error, remote_abort); 1352 ok = true; 1353 } 1354 spin_unlock_bh(&call->state_lock); 1355 if (ok) { 1356 trace_afs_call_done(call); 1357 1358 /* Asynchronous calls have two refs to release - one from the alloc and 1359 * one queued with the work item - and we can't just deallocate the 1360 * call because the work item may be queued again. 1361 */ 1362 if (call->drop_ref) 1363 afs_put_call(call); 1364 } 1365 } 1366 1367 /* 1368 * security.c 1369 */ 1370 extern void afs_put_permits(struct afs_permits *); 1371 extern void afs_clear_permits(struct afs_vnode *); 1372 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, 1373 struct afs_status_cb *); 1374 extern void afs_zap_permits(struct rcu_head *); 1375 extern struct key *afs_request_key(struct afs_cell *); 1376 extern struct key *afs_request_key_rcu(struct afs_cell *); 1377 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); 1378 extern int afs_permission(struct user_namespace *, struct inode *, int); 1379 extern void __exit afs_clean_up_permit_cache(void); 1380 1381 /* 1382 * server.c 1383 */ 1384 extern spinlock_t afs_server_peer_lock; 1385 1386 extern struct afs_server *afs_find_server(struct afs_net *, 1387 const struct sockaddr_rxrpc *); 1388 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); 1389 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); 1390 extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); 1391 extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace); 1392 extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1393 extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace); 1394 extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1395 extern void afs_manage_servers(struct work_struct *); 1396 extern void afs_servers_timer(struct timer_list *); 1397 extern void afs_fs_probe_timer(struct timer_list *); 1398 extern void __net_exit afs_purge_servers(struct afs_net *); 1399 extern bool afs_check_server_record(struct afs_operation *, struct afs_server *); 1400 1401 static inline void afs_inc_servers_outstanding(struct afs_net *net) 1402 { 1403 atomic_inc(&net->servers_outstanding); 1404 } 1405 1406 static inline void afs_dec_servers_outstanding(struct afs_net *net) 1407 { 1408 if (atomic_dec_and_test(&net->servers_outstanding)) 1409 wake_up_var(&net->servers_outstanding); 1410 } 1411 1412 static inline bool afs_is_probing_server(struct afs_server *server) 1413 { 1414 return list_empty(&server->probe_link); 1415 } 1416 1417 /* 1418 * server_list.c 1419 */ 1420 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) 1421 { 1422 refcount_inc(&slist->usage); 1423 return slist; 1424 } 1425 1426 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); 1427 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, 1428 struct afs_vldb_entry *, 1429 u8); 1430 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); 1431 1432 /* 1433 * super.c 1434 */ 1435 extern int __init afs_fs_init(void); 1436 extern void afs_fs_exit(void); 1437 1438 /* 1439 * vlclient.c 1440 */ 1441 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, 1442 const char *, int); 1443 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); 1444 extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, 1445 struct key *, struct afs_vlserver *, unsigned int); 1446 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); 1447 extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); 1448 1449 /* 1450 * vl_alias.c 1451 */ 1452 extern int afs_cell_detect_alias(struct afs_cell *, struct key *); 1453 1454 /* 1455 * vl_probe.c 1456 */ 1457 extern void afs_vlserver_probe_result(struct afs_call *); 1458 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); 1459 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); 1460 1461 /* 1462 * vl_rotate.c 1463 */ 1464 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, 1465 struct afs_cell *, struct key *); 1466 extern bool afs_select_vlserver(struct afs_vl_cursor *); 1467 extern bool afs_select_current_vlserver(struct afs_vl_cursor *); 1468 extern int afs_end_vlserver_operation(struct afs_vl_cursor *); 1469 1470 /* 1471 * vlserver_list.c 1472 */ 1473 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) 1474 { 1475 atomic_inc(&vlserver->usage); 1476 return vlserver; 1477 } 1478 1479 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) 1480 { 1481 if (vllist) 1482 atomic_inc(&vllist->usage); 1483 return vllist; 1484 } 1485 1486 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); 1487 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); 1488 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); 1489 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); 1490 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, 1491 const void *, size_t); 1492 1493 /* 1494 * volume.c 1495 */ 1496 extern struct afs_volume *afs_create_volume(struct afs_fs_context *); 1497 extern void afs_activate_volume(struct afs_volume *); 1498 extern void afs_deactivate_volume(struct afs_volume *); 1499 extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); 1500 extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace); 1501 extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); 1502 1503 /* 1504 * write.c 1505 */ 1506 extern int afs_set_page_dirty(struct page *); 1507 extern int afs_write_begin(struct file *file, struct address_space *mapping, 1508 loff_t pos, unsigned len, unsigned flags, 1509 struct page **pagep, void **fsdata); 1510 extern int afs_write_end(struct file *file, struct address_space *mapping, 1511 loff_t pos, unsigned len, unsigned copied, 1512 struct page *page, void *fsdata); 1513 extern int afs_writepage(struct page *, struct writeback_control *); 1514 extern int afs_writepages(struct address_space *, struct writeback_control *); 1515 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); 1516 extern int afs_fsync(struct file *, loff_t, loff_t, int); 1517 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); 1518 extern void afs_prune_wb_keys(struct afs_vnode *); 1519 extern int afs_launder_page(struct page *); 1520 1521 /* 1522 * xattr.c 1523 */ 1524 extern const struct xattr_handler *afs_xattr_handlers[]; 1525 1526 /* 1527 * yfsclient.c 1528 */ 1529 extern void yfs_fs_fetch_data(struct afs_operation *); 1530 extern void yfs_fs_create_file(struct afs_operation *); 1531 extern void yfs_fs_make_dir(struct afs_operation *); 1532 extern void yfs_fs_remove_file2(struct afs_operation *); 1533 extern void yfs_fs_remove_file(struct afs_operation *); 1534 extern void yfs_fs_remove_dir(struct afs_operation *); 1535 extern void yfs_fs_link(struct afs_operation *); 1536 extern void yfs_fs_symlink(struct afs_operation *); 1537 extern void yfs_fs_rename(struct afs_operation *); 1538 extern void yfs_fs_store_data(struct afs_operation *); 1539 extern void yfs_fs_setattr(struct afs_operation *); 1540 extern void yfs_fs_get_volume_status(struct afs_operation *); 1541 extern void yfs_fs_set_lock(struct afs_operation *); 1542 extern void yfs_fs_extend_lock(struct afs_operation *); 1543 extern void yfs_fs_release_lock(struct afs_operation *); 1544 extern void yfs_fs_fetch_status(struct afs_operation *); 1545 extern void yfs_fs_inline_bulk_status(struct afs_operation *); 1546 1547 struct yfs_acl { 1548 struct afs_acl *acl; /* Dir/file/symlink ACL */ 1549 struct afs_acl *vol_acl; /* Whole volume ACL */ 1550 u32 inherit_flag; /* True if ACL is inherited from parent dir */ 1551 u32 num_cleaned; /* Number of ACEs removed due to subject removal */ 1552 unsigned int flags; 1553 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ 1554 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ 1555 }; 1556 1557 extern void yfs_free_opaque_acl(struct yfs_acl *); 1558 extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); 1559 extern void yfs_fs_store_opaque_acl2(struct afs_operation *); 1560 1561 /* 1562 * Miscellaneous inline functions. 1563 */ 1564 static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 1565 { 1566 return container_of(inode, struct afs_vnode, vfs_inode); 1567 } 1568 1569 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 1570 { 1571 return &vnode->vfs_inode; 1572 } 1573 1574 /* 1575 * Note that a dentry got changed. We need to set d_fsdata to the data version 1576 * number derived from the result of the operation. It doesn't matter if 1577 * d_fsdata goes backwards as we'll just revalidate. 1578 */ 1579 static inline void afs_update_dentry_version(struct afs_operation *op, 1580 struct afs_vnode_param *dir_vp, 1581 struct dentry *dentry) 1582 { 1583 if (!op->error) 1584 dentry->d_fsdata = 1585 (void *)(unsigned long)dir_vp->scb.status.data_version; 1586 } 1587 1588 /* 1589 * Check for a conflicting operation on a directory that we just unlinked from. 1590 * If someone managed to sneak a link or an unlink in on the file we just 1591 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). 1592 */ 1593 static inline void afs_check_dir_conflict(struct afs_operation *op, 1594 struct afs_vnode_param *dvp) 1595 { 1596 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) 1597 op->flags |= AFS_OPERATION_DIR_CONFLICT; 1598 } 1599 1600 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) 1601 { 1602 trace_afs_io_error(call->debug_id, -EIO, where); 1603 return -EIO; 1604 } 1605 1606 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) 1607 { 1608 trace_afs_file_error(vnode, -EIO, where); 1609 return -EIO; 1610 } 1611 1612 /*****************************************************************************/ 1613 /* 1614 * debug tracing 1615 */ 1616 extern unsigned afs_debug; 1617 1618 #define dbgprintk(FMT,...) \ 1619 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1620 1621 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1622 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1623 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1624 1625 1626 #if defined(__KDEBUG) 1627 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1628 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1629 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1630 1631 #elif defined(CONFIG_AFS_DEBUG) 1632 #define AFS_DEBUG_KENTER 0x01 1633 #define AFS_DEBUG_KLEAVE 0x02 1634 #define AFS_DEBUG_KDEBUG 0x04 1635 1636 #define _enter(FMT,...) \ 1637 do { \ 1638 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 1639 kenter(FMT,##__VA_ARGS__); \ 1640 } while (0) 1641 1642 #define _leave(FMT,...) \ 1643 do { \ 1644 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 1645 kleave(FMT,##__VA_ARGS__); \ 1646 } while (0) 1647 1648 #define _debug(FMT,...) \ 1649 do { \ 1650 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 1651 kdebug(FMT,##__VA_ARGS__); \ 1652 } while (0) 1653 1654 #else 1655 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1656 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1657 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1658 #endif 1659 1660 /* 1661 * debug assertion checking 1662 */ 1663 #if 1 // defined(__KDEBUGALL) 1664 1665 #define ASSERT(X) \ 1666 do { \ 1667 if (unlikely(!(X))) { \ 1668 printk(KERN_ERR "\n"); \ 1669 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1670 BUG(); \ 1671 } \ 1672 } while(0) 1673 1674 #define ASSERTCMP(X, OP, Y) \ 1675 do { \ 1676 if (unlikely(!((X) OP (Y)))) { \ 1677 printk(KERN_ERR "\n"); \ 1678 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1679 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1680 (unsigned long)(X), (unsigned long)(Y)); \ 1681 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1682 (unsigned long)(X), (unsigned long)(Y)); \ 1683 BUG(); \ 1684 } \ 1685 } while(0) 1686 1687 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1688 do { \ 1689 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 1690 printk(KERN_ERR "\n"); \ 1691 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1692 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 1693 (unsigned long)(L), (unsigned long)(N), \ 1694 (unsigned long)(H)); \ 1695 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 1696 (unsigned long)(L), (unsigned long)(N), \ 1697 (unsigned long)(H)); \ 1698 BUG(); \ 1699 } \ 1700 } while(0) 1701 1702 #define ASSERTIF(C, X) \ 1703 do { \ 1704 if (unlikely((C) && !(X))) { \ 1705 printk(KERN_ERR "\n"); \ 1706 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1707 BUG(); \ 1708 } \ 1709 } while(0) 1710 1711 #define ASSERTIFCMP(C, X, OP, Y) \ 1712 do { \ 1713 if (unlikely((C) && !((X) OP (Y)))) { \ 1714 printk(KERN_ERR "\n"); \ 1715 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1716 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1717 (unsigned long)(X), (unsigned long)(Y)); \ 1718 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1719 (unsigned long)(X), (unsigned long)(Y)); \ 1720 BUG(); \ 1721 } \ 1722 } while(0) 1723 1724 #else 1725 1726 #define ASSERT(X) \ 1727 do { \ 1728 } while(0) 1729 1730 #define ASSERTCMP(X, OP, Y) \ 1731 do { \ 1732 } while(0) 1733 1734 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1735 do { \ 1736 } while(0) 1737 1738 #define ASSERTIF(C, X) \ 1739 do { \ 1740 } while(0) 1741 1742 #define ASSERTIFCMP(C, X, OP, Y) \ 1743 do { \ 1744 } while(0) 1745 1746 #endif /* __KDEBUGALL */ 1747