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/filelock.h> 13 #include <linux/pagemap.h> 14 #include <linux/rxrpc.h> 15 #include <linux/key.h> 16 #include <linux/workqueue.h> 17 #include <linux/sched.h> 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 refcount_t ref; 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 in secs 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 intr; /* T if interruptible */ 142 bool unmarshalling_error; /* T if an unmarshalling error occurred */ 143 u16 service_id; /* Actual service ID (after upgrade) */ 144 unsigned int debug_id; /* Trace ID */ 145 u32 operation_ID; /* operation ID for an incoming call */ 146 u32 count; /* count for use in unmarshalling */ 147 union { /* place to extract temporary data */ 148 struct { 149 __be32 tmp_u; 150 __be32 tmp; 151 } __attribute__((packed)); 152 __be64 tmp64; 153 }; 154 ktime_t issue_time; /* Time of issue of operation */ 155 }; 156 157 struct afs_call_type { 158 const char *name; 159 unsigned int op; /* Really enum afs_fs_operation */ 160 161 /* deliver request or reply data to an call 162 * - returning an error will cause the call to be aborted 163 */ 164 int (*deliver)(struct afs_call *call); 165 166 /* clean up a call */ 167 void (*destructor)(struct afs_call *call); 168 169 /* Work function */ 170 void (*work)(struct work_struct *work); 171 172 /* Call done function (gets called immediately on success or failure) */ 173 void (*done)(struct afs_call *call); 174 }; 175 176 /* 177 * Key available for writeback on a file. 178 */ 179 struct afs_wb_key { 180 refcount_t usage; 181 struct key *key; 182 struct list_head vnode_link; /* Link in vnode->wb_keys */ 183 }; 184 185 /* 186 * AFS open file information record. Pointed to by file->private_data. 187 */ 188 struct afs_file { 189 struct key *key; /* The key this file was opened with */ 190 struct afs_wb_key *wb; /* Writeback key record for this file */ 191 }; 192 193 static inline struct key *afs_file_key(struct file *file) 194 { 195 struct afs_file *af = file->private_data; 196 197 return af->key; 198 } 199 200 /* 201 * Record of an outstanding read operation on a vnode. 202 */ 203 struct afs_read { 204 loff_t pos; /* Where to start reading */ 205 loff_t len; /* How much we're asking for */ 206 loff_t actual_len; /* How much we're actually getting */ 207 loff_t file_size; /* File size returned by server */ 208 struct key *key; /* The key to use to reissue the read */ 209 struct afs_vnode *vnode; /* The file being read into. */ 210 struct netfs_io_subrequest *subreq; /* Fscache helper read request this belongs to */ 211 afs_dataversion_t data_version; /* Version number returned by server */ 212 refcount_t usage; 213 unsigned int call_debug_id; 214 unsigned int nr_pages; 215 int error; 216 void (*done)(struct afs_read *); 217 void (*cleanup)(struct afs_read *); 218 struct iov_iter *iter; /* Iterator representing the buffer */ 219 struct iov_iter def_iter; /* Default iterator */ 220 }; 221 222 /* 223 * AFS superblock private data 224 * - there's one superblock per volume 225 */ 226 struct afs_super_info { 227 struct net *net_ns; /* Network namespace */ 228 struct afs_cell *cell; /* The cell in which the volume resides */ 229 struct afs_volume *volume; /* volume record */ 230 enum afs_flock_mode flock_mode:8; /* File locking emulation mode */ 231 bool dyn_root; /* True if dynamic root */ 232 }; 233 234 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) 235 { 236 return sb->s_fs_info; 237 } 238 239 extern struct file_system_type afs_fs_type; 240 241 /* 242 * Set of substitutes for @sys. 243 */ 244 struct afs_sysnames { 245 #define AFS_NR_SYSNAME 16 246 char *subs[AFS_NR_SYSNAME]; 247 refcount_t usage; 248 unsigned short nr; 249 char blank[1]; 250 }; 251 252 /* 253 * AFS network namespace record. 254 */ 255 struct afs_net { 256 struct net *net; /* Backpointer to the owning net namespace */ 257 struct afs_uuid uuid; 258 bool live; /* F if this namespace is being removed */ 259 260 /* AF_RXRPC I/O stuff */ 261 struct socket *socket; 262 struct afs_call *spare_incoming_call; 263 struct work_struct charge_preallocation_work; 264 struct mutex socket_mutex; 265 atomic_t nr_outstanding_calls; 266 atomic_t nr_superblocks; 267 268 /* Cell database */ 269 struct rb_root cells; 270 struct afs_cell *ws_cell; 271 struct work_struct cells_manager; 272 struct timer_list cells_timer; 273 atomic_t cells_outstanding; 274 struct rw_semaphore cells_lock; 275 struct mutex cells_alias_lock; 276 277 struct mutex proc_cells_lock; 278 struct hlist_head proc_cells; 279 280 /* Known servers. Theoretically each fileserver can only be in one 281 * cell, but in practice, people create aliases and subsets and there's 282 * no easy way to distinguish them. 283 */ 284 seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */ 285 struct rb_root fs_servers; /* afs_server (by server UUID or address) */ 286 struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */ 287 struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */ 288 struct hlist_head fs_proc; /* procfs servers list */ 289 290 struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ 291 struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */ 292 seqlock_t fs_addr_lock; /* For fs_addresses[46] */ 293 294 struct work_struct fs_manager; 295 struct timer_list fs_timer; 296 297 struct work_struct fs_prober; 298 struct timer_list fs_probe_timer; 299 atomic_t servers_outstanding; 300 301 /* File locking renewal management */ 302 struct mutex lock_manager_mutex; 303 304 /* Misc */ 305 struct super_block *dynroot_sb; /* Dynamic root mount superblock */ 306 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ 307 struct afs_sysnames *sysnames; 308 rwlock_t sysnames_lock; 309 310 /* Statistics counters */ 311 atomic_t n_lookup; /* Number of lookups done */ 312 atomic_t n_reval; /* Number of dentries needing revalidation */ 313 atomic_t n_inval; /* Number of invalidations by the server */ 314 atomic_t n_relpg; /* Number of invalidations by release_folio */ 315 atomic_t n_read_dir; /* Number of directory pages read */ 316 atomic_t n_dir_cr; /* Number of directory entry creation edits */ 317 atomic_t n_dir_rm; /* Number of directory entry removal edits */ 318 atomic_t n_stores; /* Number of store ops */ 319 atomic_long_t n_store_bytes; /* Number of bytes stored */ 320 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ 321 atomic_t n_fetches; /* Number of data fetch ops */ 322 }; 323 324 extern const char afs_init_sysname[]; 325 326 enum afs_cell_state { 327 AFS_CELL_UNSET, 328 AFS_CELL_ACTIVATING, 329 AFS_CELL_ACTIVE, 330 AFS_CELL_DEACTIVATING, 331 AFS_CELL_INACTIVE, 332 AFS_CELL_FAILED, 333 AFS_CELL_REMOVED, 334 }; 335 336 /* 337 * AFS cell record. 338 * 339 * This is a tricky concept to get right as it is possible to create aliases 340 * simply by pointing AFSDB/SRV records for two names at the same set of VL 341 * servers; it is also possible to do things like setting up two sets of VL 342 * servers, one of which provides a superset of the volumes provided by the 343 * other (for internal/external division, for example). 344 * 345 * Cells only exist in the sense that (a) a cell's name maps to a set of VL 346 * servers and (b) a cell's name is used by the client to select the key to use 347 * for authentication and encryption. The cell name is not typically used in 348 * the protocol. 349 * 350 * Two cells are determined to be aliases if they have an explicit alias (YFS 351 * only), share any VL servers in common or have at least one volume in common. 352 * "In common" means that the address list of the VL servers or the fileservers 353 * share at least one endpoint. 354 */ 355 struct afs_cell { 356 union { 357 struct rcu_head rcu; 358 struct rb_node net_node; /* Node in net->cells */ 359 }; 360 struct afs_net *net; 361 struct afs_cell *alias_of; /* The cell this is an alias of */ 362 struct afs_volume *root_volume; /* The root.cell volume if there is one */ 363 struct key *anonymous_key; /* anonymous user key for this cell */ 364 struct work_struct manager; /* Manager for init/deinit/dns */ 365 struct hlist_node proc_link; /* /proc cell list link */ 366 time64_t dns_expiry; /* Time AFSDB/SRV record expires */ 367 time64_t last_inactive; /* Time of last drop of usage count */ 368 refcount_t ref; /* Struct refcount */ 369 atomic_t active; /* Active usage counter */ 370 unsigned long flags; 371 #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */ 372 #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */ 373 #define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */ 374 enum afs_cell_state state; 375 short error; 376 enum dns_record_source dns_source:8; /* Latest source of data from lookup */ 377 enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */ 378 unsigned int dns_lookup_count; /* Counter of DNS lookups */ 379 unsigned int debug_id; 380 381 /* The volumes belonging to this cell */ 382 struct rb_root volumes; /* Tree of volumes on this server */ 383 struct hlist_head proc_volumes; /* procfs volume list */ 384 seqlock_t volume_lock; /* For volumes */ 385 386 /* Active fileserver interaction state. */ 387 struct rb_root fs_servers; /* afs_server (by server UUID) */ 388 seqlock_t fs_lock; /* For fs_servers */ 389 struct rw_semaphore fs_open_mmaps_lock; 390 struct list_head fs_open_mmaps; /* List of vnodes that are mmapped */ 391 atomic_t fs_s_break; /* Counter of CB.InitCallBackState messages */ 392 393 /* VL server list. */ 394 rwlock_t vl_servers_lock; /* Lock on vl_servers */ 395 struct afs_vlserver_list __rcu *vl_servers; 396 397 u8 name_len; /* Length of name */ 398 char *name; /* Cell name, case-flattened and NUL-padded */ 399 }; 400 401 /* 402 * Volume Location server record. 403 */ 404 struct afs_vlserver { 405 struct rcu_head rcu; 406 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */ 407 unsigned long flags; 408 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ 409 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ 410 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ 411 #define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */ 412 rwlock_t lock; /* Lock on addresses */ 413 refcount_t ref; 414 unsigned int rtt; /* Server's current RTT in uS */ 415 416 /* Probe state */ 417 wait_queue_head_t probe_wq; 418 atomic_t probe_outstanding; 419 spinlock_t probe_lock; 420 struct { 421 unsigned int rtt; /* RTT in uS */ 422 u32 abort_code; 423 short error; 424 unsigned short flags; 425 #define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */ 426 #define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */ 427 #define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */ 428 #define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */ 429 } probe; 430 431 u16 port; 432 u16 name_len; /* Length of name */ 433 char name[]; /* Server name, case-flattened */ 434 }; 435 436 /* 437 * Weighted list of Volume Location servers. 438 */ 439 struct afs_vlserver_entry { 440 u16 priority; /* Preference (as SRV) */ 441 u16 weight; /* Weight (as SRV) */ 442 enum dns_record_source source:8; 443 enum dns_lookup_status status:8; 444 struct afs_vlserver *server; 445 }; 446 447 struct afs_vlserver_list { 448 struct rcu_head rcu; 449 refcount_t ref; 450 u8 nr_servers; 451 u8 index; /* Server currently in use */ 452 u8 preferred; /* Preferred server */ 453 enum dns_record_source source:8; 454 enum dns_lookup_status status:8; 455 rwlock_t lock; 456 struct afs_vlserver_entry servers[]; 457 }; 458 459 /* 460 * Cached VLDB entry. 461 * 462 * This is pointed to by cell->vldb_entries, indexed by name. 463 */ 464 struct afs_vldb_entry { 465 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ 466 467 unsigned long flags; 468 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ 469 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ 470 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ 471 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ 472 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ 473 474 uuid_t fs_server[AFS_NMAXNSERVERS]; 475 u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */ 476 u8 fs_mask[AFS_NMAXNSERVERS]; 477 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 478 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 479 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 480 short error; 481 u8 nr_servers; /* Number of server records */ 482 u8 name_len; 483 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 484 }; 485 486 /* 487 * Record of fileserver with which we're actively communicating. 488 */ 489 struct afs_server { 490 struct rcu_head rcu; 491 union { 492 uuid_t uuid; /* Server ID */ 493 struct afs_uuid _uuid; 494 }; 495 496 struct afs_addr_list __rcu *addresses; 497 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 498 struct rb_node uuid_rb; /* Link in net->fs_servers */ 499 struct afs_server __rcu *uuid_next; /* Next server with same UUID */ 500 struct afs_server *uuid_prev; /* Previous server with same UUID */ 501 struct list_head probe_link; /* Link in net->fs_probe_list */ 502 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ 503 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ 504 struct hlist_node proc_link; /* Link in net->fs_proc */ 505 struct work_struct initcb_work; /* Work for CB.InitCallBackState* */ 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 #define AFS_SERVER_FL_HAS_FS64 19 /* Fileserver supports FS.{Fetch,Store}Data64 */ 520 refcount_t ref; /* Object refcount */ 521 atomic_t active; /* Active user count */ 522 u32 addr_version; /* Address list version */ 523 unsigned int rtt; /* Server's current RTT in uS */ 524 unsigned int debug_id; /* Debugging ID for traces */ 525 526 /* file service access */ 527 rwlock_t fs_lock; /* access lock */ 528 529 /* callback promise management */ 530 unsigned cb_s_break; /* Break-everything counter. */ 531 532 /* Probe state */ 533 unsigned long probed_at; /* Time last probe was dispatched (jiffies) */ 534 wait_queue_head_t probe_wq; 535 atomic_t probe_outstanding; 536 spinlock_t probe_lock; 537 struct { 538 unsigned int rtt; /* RTT in uS */ 539 u32 abort_code; 540 short error; 541 bool responded:1; 542 bool is_yfs:1; 543 bool not_yfs:1; 544 bool local_failure:1; 545 } probe; 546 }; 547 548 /* 549 * Replaceable volume server list. 550 */ 551 struct afs_server_entry { 552 struct afs_server *server; 553 }; 554 555 struct afs_server_list { 556 struct rcu_head rcu; 557 afs_volid_t vids[AFS_MAXTYPES]; /* Volume IDs */ 558 refcount_t usage; 559 unsigned char nr_servers; 560 unsigned char preferred; /* Preferred server */ 561 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ 562 unsigned int seq; /* Set to ->servers_seq when installed */ 563 rwlock_t lock; 564 struct afs_server_entry servers[]; 565 }; 566 567 /* 568 * Live AFS volume management. 569 */ 570 struct afs_volume { 571 union { 572 struct rcu_head rcu; 573 afs_volid_t vid; /* volume ID */ 574 }; 575 refcount_t ref; 576 time64_t update_at; /* Time at which to next update */ 577 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 578 struct rb_node cell_node; /* Link in cell->volumes */ 579 struct hlist_node proc_link; /* Link in cell->proc_volumes */ 580 struct super_block __rcu *sb; /* Superblock on which inodes reside */ 581 unsigned long flags; 582 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ 583 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ 584 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ 585 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ 586 #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ 587 #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ 588 #define AFS_VOLUME_MAYBE_NO_IBULK 6 /* - T if some servers don't have InlineBulkStatus */ 589 #define AFS_VOLUME_RM_TREE 7 /* - Set if volume removed from cell->volumes */ 590 #ifdef CONFIG_AFS_FSCACHE 591 struct fscache_volume *cache; /* Caching cookie */ 592 #endif 593 struct afs_server_list __rcu *servers; /* List of servers on which volume resides */ 594 rwlock_t servers_lock; /* Lock for ->servers */ 595 unsigned int servers_seq; /* Incremented each time ->servers changes */ 596 597 unsigned cb_v_break; /* Break-everything counter. */ 598 rwlock_t cb_v_break_lock; 599 600 afs_voltype_t type; /* type of volume */ 601 char type_force; /* force volume type (suppress R/O -> R/W) */ 602 u8 name_len; 603 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 604 }; 605 606 enum afs_lock_state { 607 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ 608 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ 609 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ 610 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ 611 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ 612 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ 613 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ 614 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */ 615 }; 616 617 /* 618 * AFS inode private data. 619 * 620 * Note that afs_alloc_inode() *must* reset anything that could incorrectly 621 * leak from one inode to another. 622 */ 623 struct afs_vnode { 624 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 625 struct afs_volume *volume; /* volume on which vnode resides */ 626 struct afs_fid fid; /* the file identifier for this inode */ 627 struct afs_file_status status; /* AFS status info for this file */ 628 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ 629 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ 630 struct mutex io_lock; /* Lock for serialising I/O on this mutex */ 631 struct rw_semaphore validate_lock; /* lock for validating this vnode */ 632 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ 633 struct key *silly_key; /* Silly rename key */ 634 spinlock_t wb_lock; /* lock for wb_keys */ 635 spinlock_t lock; /* waitqueue/flags lock */ 636 unsigned long flags; 637 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ 638 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 639 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ 640 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 641 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 642 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 643 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ 644 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ 645 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ 646 #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */ 647 #define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */ 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 struct work_struct cb_work; /* Work for mmap'd files */ 660 struct list_head cb_mmap_link; /* Link in cell->fs_open_mmaps */ 661 void *cb_server; /* Server with callback/filelock */ 662 atomic_t cb_nr_mmap; /* Number of mmaps */ 663 unsigned int cb_fs_s_break; /* Mass server break counter (cell->fs_s_break) */ 664 unsigned int cb_s_break; /* Mass break counter on ->server */ 665 unsigned int cb_v_break; /* Mass break counter on ->volume */ 666 unsigned int cb_break; /* Break counter on vnode */ 667 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ 668 669 time64_t cb_expires_at; /* time at which callback expires */ 670 }; 671 672 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) 673 { 674 #ifdef CONFIG_AFS_FSCACHE 675 return netfs_i_cookie(&vnode->netfs); 676 #else 677 return NULL; 678 #endif 679 } 680 681 static inline void afs_vnode_set_cache(struct afs_vnode *vnode, 682 struct fscache_cookie *cookie) 683 { 684 #ifdef CONFIG_AFS_FSCACHE 685 vnode->netfs.cache = cookie; 686 if (cookie) 687 mapping_set_release_always(vnode->netfs.inode.i_mapping); 688 #endif 689 } 690 691 /* 692 * cached security record for one user's attempt to access a vnode 693 */ 694 struct afs_permit { 695 struct key *key; /* RxRPC ticket holding a security context */ 696 afs_access_t access; /* CallerAccess value for this key */ 697 }; 698 699 /* 700 * Immutable cache of CallerAccess records from attempts to access vnodes. 701 * These may be shared between multiple vnodes. 702 */ 703 struct afs_permits { 704 struct rcu_head rcu; 705 struct hlist_node hash_node; /* Link in hash */ 706 unsigned long h; /* Hash value for this permit list */ 707 refcount_t usage; 708 unsigned short nr_permits; /* Number of records */ 709 bool invalidated; /* Invalidated due to key change */ 710 struct afs_permit permits[]; /* List of permits sorted by key pointer */ 711 }; 712 713 /* 714 * Error prioritisation and accumulation. 715 */ 716 struct afs_error { 717 short error; /* Accumulated error */ 718 bool responded; /* T if server responded */ 719 }; 720 721 /* 722 * Cursor for iterating over a server's address list. 723 */ 724 struct afs_addr_cursor { 725 struct afs_addr_list *alist; /* Current address list (pins ref) */ 726 unsigned long tried; /* Tried addresses */ 727 signed char index; /* Current address */ 728 bool responded; /* T if the current address responded */ 729 unsigned short nr_iterations; /* Number of address iterations */ 730 short error; 731 u32 abort_code; 732 }; 733 734 /* 735 * Cursor for iterating over a set of volume location servers. 736 */ 737 struct afs_vl_cursor { 738 struct afs_addr_cursor ac; 739 struct afs_cell *cell; /* The cell we're querying */ 740 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ 741 struct afs_vlserver *server; /* Server on which this resides */ 742 struct key *key; /* Key for the server */ 743 unsigned long untried; /* Bitmask of untried servers */ 744 short index; /* Current server */ 745 short error; 746 unsigned short flags; 747 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ 748 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ 749 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ 750 unsigned short nr_iterations; /* Number of server iterations */ 751 }; 752 753 /* 754 * Fileserver operation methods. 755 */ 756 struct afs_operation_ops { 757 void (*issue_afs_rpc)(struct afs_operation *op); 758 void (*issue_yfs_rpc)(struct afs_operation *op); 759 void (*success)(struct afs_operation *op); 760 void (*aborted)(struct afs_operation *op); 761 void (*failed)(struct afs_operation *op); 762 void (*edit_dir)(struct afs_operation *op); 763 void (*put)(struct afs_operation *op); 764 }; 765 766 struct afs_vnode_param { 767 struct afs_vnode *vnode; 768 struct afs_fid fid; /* Fid to access */ 769 struct afs_status_cb scb; /* Returned status and callback promise */ 770 afs_dataversion_t dv_before; /* Data version before the call */ 771 unsigned int cb_break_before; /* cb_break + cb_s_break before the call */ 772 u8 dv_delta; /* Expected change in data version */ 773 bool put_vnode:1; /* T if we have a ref on the vnode */ 774 bool need_io_lock:1; /* T if we need the I/O lock on this */ 775 bool update_ctime:1; /* Need to update the ctime */ 776 bool set_size:1; /* Must update i_size */ 777 bool op_unlinked:1; /* True if file was unlinked by op */ 778 bool speculative:1; /* T if speculative status fetch (no vnode lock) */ 779 bool modification:1; /* Set if the content gets modified */ 780 }; 781 782 /* 783 * Fileserver operation wrapper, handling server and address rotation 784 * asynchronously. May make simultaneous calls to multiple servers. 785 */ 786 struct afs_operation { 787 struct afs_net *net; /* Network namespace */ 788 struct key *key; /* Key for the cell */ 789 const struct afs_call_type *type; /* Type of call done */ 790 const struct afs_operation_ops *ops; 791 792 /* Parameters/results for the operation */ 793 struct afs_volume *volume; /* Volume being accessed */ 794 struct afs_vnode_param file[2]; 795 struct afs_vnode_param *more_files; 796 struct afs_volsync volsync; 797 struct dentry *dentry; /* Dentry to be altered */ 798 struct dentry *dentry_2; /* Second dentry to be altered */ 799 struct timespec64 mtime; /* Modification time to record */ 800 struct timespec64 ctime; /* Change time to set */ 801 short nr_files; /* Number of entries in file[], more_files */ 802 short error; 803 unsigned int debug_id; 804 805 unsigned int cb_v_break; /* Volume break counter before op */ 806 unsigned int cb_s_break; /* Server break counter before op */ 807 808 union { 809 struct { 810 int which; /* Which ->file[] to fetch for */ 811 } fetch_status; 812 struct { 813 int reason; /* enum afs_edit_dir_reason */ 814 mode_t mode; 815 const char *symlink; 816 } create; 817 struct { 818 bool need_rehash; 819 } unlink; 820 struct { 821 struct dentry *rehash; 822 struct dentry *tmp; 823 bool new_negative; 824 } rename; 825 struct { 826 struct afs_read *req; 827 } fetch; 828 struct { 829 afs_lock_type_t type; 830 } lock; 831 struct { 832 struct iov_iter *write_iter; 833 loff_t pos; 834 loff_t size; 835 loff_t i_size; 836 bool laundering; /* Laundering page, PG_writeback not set */ 837 } store; 838 struct { 839 struct iattr *attr; 840 loff_t old_i_size; 841 } setattr; 842 struct afs_acl *acl; 843 struct yfs_acl *yacl; 844 struct { 845 struct afs_volume_status vs; 846 struct kstatfs *buf; 847 } volstatus; 848 }; 849 850 /* Fileserver iteration state */ 851 struct afs_addr_cursor ac; 852 struct afs_server_list *server_list; /* Current server list (pins ref) */ 853 struct afs_server *server; /* Server we're using (ref pinned by server_list) */ 854 struct afs_call *call; 855 unsigned long untried; /* Bitmask of untried servers */ 856 short index; /* Current server */ 857 unsigned short nr_iterations; /* Number of server iterations */ 858 859 unsigned int flags; 860 #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ 861 #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ 862 #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ 863 #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ 864 #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ 865 #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ 866 #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ 867 #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ 868 #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ 869 #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ 870 #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ 871 #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ 872 #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ 873 }; 874 875 /* 876 * Cache auxiliary data. 877 */ 878 struct afs_vnode_cache_aux { 879 __be64 data_version; 880 } __packed; 881 882 static inline void afs_set_cache_aux(struct afs_vnode *vnode, 883 struct afs_vnode_cache_aux *aux) 884 { 885 aux->data_version = cpu_to_be64(vnode->status.data_version); 886 } 887 888 static inline void afs_invalidate_cache(struct afs_vnode *vnode, unsigned int flags) 889 { 890 struct afs_vnode_cache_aux aux; 891 892 afs_set_cache_aux(vnode, &aux); 893 fscache_invalidate(afs_vnode_cache(vnode), &aux, 894 i_size_read(&vnode->netfs.inode), flags); 895 } 896 897 /* 898 * We use folio->private to hold the amount of the folio that we've written to, 899 * splitting the field into two parts. However, we need to represent a range 900 * 0...FOLIO_SIZE, so we reduce the resolution if the size of the folio 901 * exceeds what we can encode. 902 */ 903 #ifdef CONFIG_64BIT 904 #define __AFS_FOLIO_PRIV_MASK 0x7fffffffUL 905 #define __AFS_FOLIO_PRIV_SHIFT 32 906 #define __AFS_FOLIO_PRIV_MMAPPED 0x80000000UL 907 #else 908 #define __AFS_FOLIO_PRIV_MASK 0x7fffUL 909 #define __AFS_FOLIO_PRIV_SHIFT 16 910 #define __AFS_FOLIO_PRIV_MMAPPED 0x8000UL 911 #endif 912 913 static inline unsigned int afs_folio_dirty_resolution(struct folio *folio) 914 { 915 int shift = folio_shift(folio) - (__AFS_FOLIO_PRIV_SHIFT - 1); 916 return (shift > 0) ? shift : 0; 917 } 918 919 static inline size_t afs_folio_dirty_from(struct folio *folio, unsigned long priv) 920 { 921 unsigned long x = priv & __AFS_FOLIO_PRIV_MASK; 922 923 /* The lower bound is inclusive */ 924 return x << afs_folio_dirty_resolution(folio); 925 } 926 927 static inline size_t afs_folio_dirty_to(struct folio *folio, unsigned long priv) 928 { 929 unsigned long x = (priv >> __AFS_FOLIO_PRIV_SHIFT) & __AFS_FOLIO_PRIV_MASK; 930 931 /* The upper bound is immediately beyond the region */ 932 return (x + 1) << afs_folio_dirty_resolution(folio); 933 } 934 935 static inline unsigned long afs_folio_dirty(struct folio *folio, size_t from, size_t to) 936 { 937 unsigned int res = afs_folio_dirty_resolution(folio); 938 from >>= res; 939 to = (to - 1) >> res; 940 return (to << __AFS_FOLIO_PRIV_SHIFT) | from; 941 } 942 943 static inline unsigned long afs_folio_dirty_mmapped(unsigned long priv) 944 { 945 return priv | __AFS_FOLIO_PRIV_MMAPPED; 946 } 947 948 static inline bool afs_is_folio_dirty_mmapped(unsigned long priv) 949 { 950 return priv & __AFS_FOLIO_PRIV_MMAPPED; 951 } 952 953 #include <trace/events/afs.h> 954 955 /*****************************************************************************/ 956 /* 957 * addr_list.c 958 */ 959 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) 960 { 961 if (alist) 962 refcount_inc(&alist->usage); 963 return alist; 964 } 965 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, 966 unsigned short, 967 unsigned short); 968 extern void afs_put_addrlist(struct afs_addr_list *); 969 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, 970 const char *, size_t, char, 971 unsigned short, unsigned short); 972 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); 973 extern bool afs_iterate_addresses(struct afs_addr_cursor *); 974 extern int afs_end_cursor(struct afs_addr_cursor *); 975 976 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); 977 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); 978 979 /* 980 * callback.c 981 */ 982 extern void afs_invalidate_mmap_work(struct work_struct *); 983 extern void afs_server_init_callback_work(struct work_struct *work); 984 extern void afs_init_callback_state(struct afs_server *); 985 extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 986 extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 987 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); 988 989 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) 990 { 991 return vnode->cb_break + vnode->cb_v_break; 992 } 993 994 static inline bool afs_cb_is_broken(unsigned int cb_break, 995 const struct afs_vnode *vnode) 996 { 997 return cb_break != (vnode->cb_break + vnode->volume->cb_v_break); 998 } 999 1000 /* 1001 * cell.c 1002 */ 1003 extern int afs_cell_init(struct afs_net *, const char *); 1004 extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, 1005 enum afs_cell_trace); 1006 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, 1007 const char *, bool); 1008 extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); 1009 extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace); 1010 extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); 1011 extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); 1012 extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); 1013 extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); 1014 extern void afs_manage_cells(struct work_struct *); 1015 extern void afs_cells_timer(struct timer_list *); 1016 extern void __net_exit afs_cell_purge(struct afs_net *); 1017 1018 /* 1019 * cmservice.c 1020 */ 1021 extern bool afs_cm_incoming_call(struct afs_call *); 1022 1023 /* 1024 * dir.c 1025 */ 1026 extern const struct file_operations afs_dir_file_operations; 1027 extern const struct inode_operations afs_dir_inode_operations; 1028 extern const struct address_space_operations afs_dir_aops; 1029 extern const struct dentry_operations afs_fs_dentry_operations; 1030 1031 extern void afs_d_release(struct dentry *); 1032 extern void afs_check_for_remote_deletion(struct afs_operation *); 1033 1034 /* 1035 * dir_edit.c 1036 */ 1037 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, 1038 enum afs_edit_dir_reason); 1039 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); 1040 1041 /* 1042 * dir_silly.c 1043 */ 1044 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, 1045 struct dentry *, struct key *); 1046 extern int afs_silly_iput(struct dentry *, struct inode *); 1047 1048 /* 1049 * dynroot.c 1050 */ 1051 extern const struct inode_operations afs_dynroot_inode_operations; 1052 extern const struct dentry_operations afs_dynroot_dentry_operations; 1053 1054 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); 1055 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); 1056 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); 1057 extern int afs_dynroot_populate(struct super_block *); 1058 extern void afs_dynroot_depopulate(struct super_block *); 1059 1060 /* 1061 * file.c 1062 */ 1063 extern const struct address_space_operations afs_file_aops; 1064 extern const struct address_space_operations afs_symlink_aops; 1065 extern const struct inode_operations afs_file_inode_operations; 1066 extern const struct file_operations afs_file_operations; 1067 extern const struct netfs_request_ops afs_req_ops; 1068 1069 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); 1070 extern void afs_put_wb_key(struct afs_wb_key *); 1071 extern int afs_open(struct inode *, struct file *); 1072 extern int afs_release(struct inode *, struct file *); 1073 extern int afs_fetch_data(struct afs_vnode *, struct afs_read *); 1074 extern struct afs_read *afs_alloc_read(gfp_t); 1075 extern void afs_put_read(struct afs_read *); 1076 extern int afs_write_inode(struct inode *, struct writeback_control *); 1077 1078 static inline struct afs_read *afs_get_read(struct afs_read *req) 1079 { 1080 refcount_inc(&req->usage); 1081 return req; 1082 } 1083 1084 /* 1085 * flock.c 1086 */ 1087 extern struct workqueue_struct *afs_lock_manager; 1088 1089 extern void afs_lock_op_done(struct afs_call *); 1090 extern void afs_lock_work(struct work_struct *); 1091 extern void afs_lock_may_be_available(struct afs_vnode *); 1092 extern int afs_lock(struct file *, int, struct file_lock *); 1093 extern int afs_flock(struct file *, int, struct file_lock *); 1094 1095 /* 1096 * fsclient.c 1097 */ 1098 extern void afs_fs_fetch_status(struct afs_operation *); 1099 extern void afs_fs_fetch_data(struct afs_operation *); 1100 extern void afs_fs_create_file(struct afs_operation *); 1101 extern void afs_fs_make_dir(struct afs_operation *); 1102 extern void afs_fs_remove_file(struct afs_operation *); 1103 extern void afs_fs_remove_dir(struct afs_operation *); 1104 extern void afs_fs_link(struct afs_operation *); 1105 extern void afs_fs_symlink(struct afs_operation *); 1106 extern void afs_fs_rename(struct afs_operation *); 1107 extern void afs_fs_store_data(struct afs_operation *); 1108 extern void afs_fs_setattr(struct afs_operation *); 1109 extern void afs_fs_get_volume_status(struct afs_operation *); 1110 extern void afs_fs_set_lock(struct afs_operation *); 1111 extern void afs_fs_extend_lock(struct afs_operation *); 1112 extern void afs_fs_release_lock(struct afs_operation *); 1113 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, 1114 struct afs_addr_cursor *, struct key *); 1115 extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *, 1116 struct afs_addr_cursor *, struct key *); 1117 extern void afs_fs_inline_bulk_status(struct afs_operation *); 1118 1119 struct afs_acl { 1120 u32 size; 1121 u8 data[]; 1122 }; 1123 1124 extern void afs_fs_fetch_acl(struct afs_operation *); 1125 extern void afs_fs_store_acl(struct afs_operation *); 1126 1127 /* 1128 * fs_operation.c 1129 */ 1130 extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); 1131 extern int afs_put_operation(struct afs_operation *); 1132 extern bool afs_begin_vnode_operation(struct afs_operation *); 1133 extern void afs_wait_for_operation(struct afs_operation *); 1134 extern int afs_do_sync_operation(struct afs_operation *); 1135 1136 static inline void afs_op_nomem(struct afs_operation *op) 1137 { 1138 op->error = -ENOMEM; 1139 } 1140 1141 static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, 1142 struct afs_vnode *vnode) 1143 { 1144 op->file[n].vnode = vnode; 1145 op->file[n].need_io_lock = true; 1146 } 1147 1148 static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, 1149 const struct afs_fid *fid) 1150 { 1151 op->file[n].fid = *fid; 1152 } 1153 1154 /* 1155 * fs_probe.c 1156 */ 1157 extern void afs_fileserver_probe_result(struct afs_call *); 1158 extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool); 1159 extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long); 1160 extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); 1161 extern void afs_fs_probe_dispatcher(struct work_struct *); 1162 extern int afs_wait_for_one_fs_probe(struct afs_server *, bool); 1163 extern void afs_fs_probe_cleanup(struct afs_net *); 1164 1165 /* 1166 * inode.c 1167 */ 1168 extern const struct afs_operation_ops afs_fetch_status_operation; 1169 1170 extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); 1171 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); 1172 extern int afs_ilookup5_test_by_fid(struct inode *, void *); 1173 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); 1174 extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); 1175 extern struct inode *afs_root_iget(struct super_block *, struct key *); 1176 extern bool afs_check_validity(struct afs_vnode *); 1177 extern int afs_validate(struct afs_vnode *, struct key *); 1178 bool afs_pagecache_valid(struct afs_vnode *); 1179 extern int afs_getattr(struct mnt_idmap *idmap, const struct path *, 1180 struct kstat *, u32, unsigned int); 1181 extern int afs_setattr(struct mnt_idmap *idmap, struct dentry *, struct iattr *); 1182 extern void afs_evict_inode(struct inode *); 1183 extern int afs_drop_inode(struct inode *); 1184 1185 /* 1186 * main.c 1187 */ 1188 extern struct workqueue_struct *afs_wq; 1189 extern int afs_net_id; 1190 1191 static inline struct afs_net *afs_net(struct net *net) 1192 { 1193 return net_generic(net, afs_net_id); 1194 } 1195 1196 static inline struct afs_net *afs_sb2net(struct super_block *sb) 1197 { 1198 return afs_net(AFS_FS_S(sb)->net_ns); 1199 } 1200 1201 static inline struct afs_net *afs_d2net(struct dentry *dentry) 1202 { 1203 return afs_sb2net(dentry->d_sb); 1204 } 1205 1206 static inline struct afs_net *afs_i2net(struct inode *inode) 1207 { 1208 return afs_sb2net(inode->i_sb); 1209 } 1210 1211 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 1212 { 1213 return afs_i2net(&vnode->netfs.inode); 1214 } 1215 1216 static inline struct afs_net *afs_sock2net(struct sock *sk) 1217 { 1218 return net_generic(sock_net(sk), afs_net_id); 1219 } 1220 1221 static inline void __afs_stat(atomic_t *s) 1222 { 1223 atomic_inc(s); 1224 } 1225 1226 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) 1227 1228 /* 1229 * misc.c 1230 */ 1231 extern int afs_abort_to_error(u32); 1232 extern void afs_prioritise_error(struct afs_error *, int, u32); 1233 1234 /* 1235 * mntpt.c 1236 */ 1237 extern const struct inode_operations afs_mntpt_inode_operations; 1238 extern const struct inode_operations afs_autocell_inode_operations; 1239 extern const struct file_operations afs_mntpt_file_operations; 1240 1241 extern struct vfsmount *afs_d_automount(struct path *); 1242 extern void afs_mntpt_kill_timer(void); 1243 1244 /* 1245 * proc.c 1246 */ 1247 #ifdef CONFIG_PROC_FS 1248 extern int __net_init afs_proc_init(struct afs_net *); 1249 extern void __net_exit afs_proc_cleanup(struct afs_net *); 1250 extern int afs_proc_cell_setup(struct afs_cell *); 1251 extern void afs_proc_cell_remove(struct afs_cell *); 1252 extern void afs_put_sysnames(struct afs_sysnames *); 1253 #else 1254 static inline int afs_proc_init(struct afs_net *net) { return 0; } 1255 static inline void afs_proc_cleanup(struct afs_net *net) {} 1256 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } 1257 static inline void afs_proc_cell_remove(struct afs_cell *cell) {} 1258 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} 1259 #endif 1260 1261 /* 1262 * rotate.c 1263 */ 1264 extern bool afs_select_fileserver(struct afs_operation *); 1265 extern void afs_dump_edestaddrreq(const struct afs_operation *); 1266 1267 /* 1268 * rxrpc.c 1269 */ 1270 extern struct workqueue_struct *afs_async_calls; 1271 1272 extern int __net_init afs_open_socket(struct afs_net *); 1273 extern void __net_exit afs_close_socket(struct afs_net *); 1274 extern void afs_charge_preallocation(struct work_struct *); 1275 extern void afs_put_call(struct afs_call *); 1276 extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t); 1277 extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *); 1278 extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 1279 const struct afs_call_type *, 1280 size_t, size_t); 1281 extern void afs_flat_call_destructor(struct afs_call *); 1282 extern void afs_send_empty_reply(struct afs_call *); 1283 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 1284 extern int afs_extract_data(struct afs_call *, bool); 1285 extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); 1286 1287 static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, 1288 gfp_t gfp) 1289 { 1290 op->call = call; 1291 op->type = call->type; 1292 call->op = op; 1293 call->key = op->key; 1294 call->intr = !(op->flags & AFS_OPERATION_UNINTR); 1295 afs_make_call(&op->ac, call, gfp); 1296 } 1297 1298 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) 1299 { 1300 call->iov_len = size; 1301 call->kvec[0].iov_base = buf; 1302 call->kvec[0].iov_len = size; 1303 iov_iter_kvec(&call->def_iter, ITER_DEST, call->kvec, 1, size); 1304 } 1305 1306 static inline void afs_extract_to_tmp(struct afs_call *call) 1307 { 1308 call->iov_len = sizeof(call->tmp); 1309 afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); 1310 } 1311 1312 static inline void afs_extract_to_tmp64(struct afs_call *call) 1313 { 1314 call->iov_len = sizeof(call->tmp64); 1315 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); 1316 } 1317 1318 static inline void afs_extract_discard(struct afs_call *call, size_t size) 1319 { 1320 call->iov_len = size; 1321 iov_iter_discard(&call->def_iter, ITER_DEST, size); 1322 } 1323 1324 static inline void afs_extract_to_buf(struct afs_call *call, size_t size) 1325 { 1326 call->iov_len = size; 1327 afs_extract_begin(call, call->buffer, size); 1328 } 1329 1330 static inline int afs_transfer_reply(struct afs_call *call) 1331 { 1332 return afs_extract_data(call, false); 1333 } 1334 1335 static inline bool afs_check_call_state(struct afs_call *call, 1336 enum afs_call_state state) 1337 { 1338 return READ_ONCE(call->state) == state; 1339 } 1340 1341 static inline bool afs_set_call_state(struct afs_call *call, 1342 enum afs_call_state from, 1343 enum afs_call_state to) 1344 { 1345 bool ok = false; 1346 1347 spin_lock_bh(&call->state_lock); 1348 if (call->state == from) { 1349 call->state = to; 1350 trace_afs_call_state(call, from, to, 0, 0); 1351 ok = true; 1352 } 1353 spin_unlock_bh(&call->state_lock); 1354 return ok; 1355 } 1356 1357 static inline void afs_set_call_complete(struct afs_call *call, 1358 int error, u32 remote_abort) 1359 { 1360 enum afs_call_state state; 1361 bool ok = false; 1362 1363 spin_lock_bh(&call->state_lock); 1364 state = call->state; 1365 if (state != AFS_CALL_COMPLETE) { 1366 call->abort_code = remote_abort; 1367 call->error = error; 1368 call->state = AFS_CALL_COMPLETE; 1369 trace_afs_call_state(call, state, AFS_CALL_COMPLETE, 1370 error, remote_abort); 1371 ok = true; 1372 } 1373 spin_unlock_bh(&call->state_lock); 1374 if (ok) { 1375 trace_afs_call_done(call); 1376 1377 /* Asynchronous calls have two refs to release - one from the alloc and 1378 * one queued with the work item - and we can't just deallocate the 1379 * call because the work item may be queued again. 1380 */ 1381 if (call->drop_ref) 1382 afs_put_call(call); 1383 } 1384 } 1385 1386 /* 1387 * security.c 1388 */ 1389 extern void afs_put_permits(struct afs_permits *); 1390 extern void afs_clear_permits(struct afs_vnode *); 1391 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, 1392 struct afs_status_cb *); 1393 extern struct key *afs_request_key(struct afs_cell *); 1394 extern struct key *afs_request_key_rcu(struct afs_cell *); 1395 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); 1396 extern int afs_permission(struct mnt_idmap *, struct inode *, int); 1397 extern void __exit afs_clean_up_permit_cache(void); 1398 1399 /* 1400 * server.c 1401 */ 1402 extern spinlock_t afs_server_peer_lock; 1403 1404 extern struct afs_server *afs_find_server(struct afs_net *, 1405 const struct sockaddr_rxrpc *); 1406 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); 1407 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); 1408 extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); 1409 extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace); 1410 extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1411 extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace); 1412 extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1413 extern void afs_manage_servers(struct work_struct *); 1414 extern void afs_servers_timer(struct timer_list *); 1415 extern void afs_fs_probe_timer(struct timer_list *); 1416 extern void __net_exit afs_purge_servers(struct afs_net *); 1417 extern bool afs_check_server_record(struct afs_operation *, struct afs_server *); 1418 1419 static inline void afs_inc_servers_outstanding(struct afs_net *net) 1420 { 1421 atomic_inc(&net->servers_outstanding); 1422 } 1423 1424 static inline void afs_dec_servers_outstanding(struct afs_net *net) 1425 { 1426 if (atomic_dec_and_test(&net->servers_outstanding)) 1427 wake_up_var(&net->servers_outstanding); 1428 } 1429 1430 static inline bool afs_is_probing_server(struct afs_server *server) 1431 { 1432 return list_empty(&server->probe_link); 1433 } 1434 1435 /* 1436 * server_list.c 1437 */ 1438 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) 1439 { 1440 refcount_inc(&slist->usage); 1441 return slist; 1442 } 1443 1444 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); 1445 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, 1446 struct afs_vldb_entry *, 1447 u8); 1448 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); 1449 1450 /* 1451 * super.c 1452 */ 1453 extern int __init afs_fs_init(void); 1454 extern void afs_fs_exit(void); 1455 1456 /* 1457 * vlclient.c 1458 */ 1459 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, 1460 const char *, int); 1461 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); 1462 extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, 1463 struct key *, struct afs_vlserver *, unsigned int); 1464 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); 1465 extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); 1466 1467 /* 1468 * vl_alias.c 1469 */ 1470 extern int afs_cell_detect_alias(struct afs_cell *, struct key *); 1471 1472 /* 1473 * vl_probe.c 1474 */ 1475 extern void afs_vlserver_probe_result(struct afs_call *); 1476 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); 1477 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); 1478 1479 /* 1480 * vl_rotate.c 1481 */ 1482 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, 1483 struct afs_cell *, struct key *); 1484 extern bool afs_select_vlserver(struct afs_vl_cursor *); 1485 extern bool afs_select_current_vlserver(struct afs_vl_cursor *); 1486 extern int afs_end_vlserver_operation(struct afs_vl_cursor *); 1487 1488 /* 1489 * vlserver_list.c 1490 */ 1491 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) 1492 { 1493 refcount_inc(&vlserver->ref); 1494 return vlserver; 1495 } 1496 1497 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) 1498 { 1499 if (vllist) 1500 refcount_inc(&vllist->ref); 1501 return vllist; 1502 } 1503 1504 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); 1505 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); 1506 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); 1507 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); 1508 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, 1509 const void *, size_t); 1510 1511 /* 1512 * volume.c 1513 */ 1514 extern struct afs_volume *afs_create_volume(struct afs_fs_context *); 1515 extern int afs_activate_volume(struct afs_volume *); 1516 extern void afs_deactivate_volume(struct afs_volume *); 1517 bool afs_try_get_volume(struct afs_volume *volume, enum afs_volume_trace reason); 1518 extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); 1519 extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace); 1520 extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); 1521 1522 /* 1523 * write.c 1524 */ 1525 #ifdef CONFIG_AFS_FSCACHE 1526 bool afs_dirty_folio(struct address_space *, struct folio *); 1527 #else 1528 #define afs_dirty_folio filemap_dirty_folio 1529 #endif 1530 extern int afs_write_begin(struct file *file, struct address_space *mapping, 1531 loff_t pos, unsigned len, 1532 struct page **pagep, void **fsdata); 1533 extern int afs_write_end(struct file *file, struct address_space *mapping, 1534 loff_t pos, unsigned len, unsigned copied, 1535 struct page *page, void *fsdata); 1536 extern int afs_writepage(struct page *, struct writeback_control *); 1537 extern int afs_writepages(struct address_space *, struct writeback_control *); 1538 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); 1539 extern int afs_fsync(struct file *, loff_t, loff_t, int); 1540 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); 1541 extern void afs_prune_wb_keys(struct afs_vnode *); 1542 int afs_launder_folio(struct folio *); 1543 1544 /* 1545 * xattr.c 1546 */ 1547 extern const struct xattr_handler *afs_xattr_handlers[]; 1548 1549 /* 1550 * yfsclient.c 1551 */ 1552 extern void yfs_fs_fetch_data(struct afs_operation *); 1553 extern void yfs_fs_create_file(struct afs_operation *); 1554 extern void yfs_fs_make_dir(struct afs_operation *); 1555 extern void yfs_fs_remove_file2(struct afs_operation *); 1556 extern void yfs_fs_remove_file(struct afs_operation *); 1557 extern void yfs_fs_remove_dir(struct afs_operation *); 1558 extern void yfs_fs_link(struct afs_operation *); 1559 extern void yfs_fs_symlink(struct afs_operation *); 1560 extern void yfs_fs_rename(struct afs_operation *); 1561 extern void yfs_fs_store_data(struct afs_operation *); 1562 extern void yfs_fs_setattr(struct afs_operation *); 1563 extern void yfs_fs_get_volume_status(struct afs_operation *); 1564 extern void yfs_fs_set_lock(struct afs_operation *); 1565 extern void yfs_fs_extend_lock(struct afs_operation *); 1566 extern void yfs_fs_release_lock(struct afs_operation *); 1567 extern void yfs_fs_fetch_status(struct afs_operation *); 1568 extern void yfs_fs_inline_bulk_status(struct afs_operation *); 1569 1570 struct yfs_acl { 1571 struct afs_acl *acl; /* Dir/file/symlink ACL */ 1572 struct afs_acl *vol_acl; /* Whole volume ACL */ 1573 u32 inherit_flag; /* True if ACL is inherited from parent dir */ 1574 u32 num_cleaned; /* Number of ACEs removed due to subject removal */ 1575 unsigned int flags; 1576 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ 1577 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ 1578 }; 1579 1580 extern void yfs_free_opaque_acl(struct yfs_acl *); 1581 extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); 1582 extern void yfs_fs_store_opaque_acl2(struct afs_operation *); 1583 1584 /* 1585 * Miscellaneous inline functions. 1586 */ 1587 static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 1588 { 1589 return container_of(inode, struct afs_vnode, netfs.inode); 1590 } 1591 1592 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 1593 { 1594 return &vnode->netfs.inode; 1595 } 1596 1597 /* 1598 * Note that a dentry got changed. We need to set d_fsdata to the data version 1599 * number derived from the result of the operation. It doesn't matter if 1600 * d_fsdata goes backwards as we'll just revalidate. 1601 */ 1602 static inline void afs_update_dentry_version(struct afs_operation *op, 1603 struct afs_vnode_param *dir_vp, 1604 struct dentry *dentry) 1605 { 1606 if (!op->error) 1607 dentry->d_fsdata = 1608 (void *)(unsigned long)dir_vp->scb.status.data_version; 1609 } 1610 1611 /* 1612 * Set the file size and block count. Estimate the number of 512 bytes blocks 1613 * used, rounded up to nearest 1K for consistency with other AFS clients. 1614 */ 1615 static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size) 1616 { 1617 i_size_write(&vnode->netfs.inode, size); 1618 vnode->netfs.inode.i_blocks = ((size + 1023) >> 10) << 1; 1619 } 1620 1621 /* 1622 * Check for a conflicting operation on a directory that we just unlinked from. 1623 * If someone managed to sneak a link or an unlink in on the file we just 1624 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). 1625 */ 1626 static inline void afs_check_dir_conflict(struct afs_operation *op, 1627 struct afs_vnode_param *dvp) 1628 { 1629 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) 1630 op->flags |= AFS_OPERATION_DIR_CONFLICT; 1631 } 1632 1633 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) 1634 { 1635 trace_afs_io_error(call->debug_id, -EIO, where); 1636 return -EIO; 1637 } 1638 1639 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) 1640 { 1641 trace_afs_file_error(vnode, -EIO, where); 1642 return -EIO; 1643 } 1644 1645 /*****************************************************************************/ 1646 /* 1647 * debug tracing 1648 */ 1649 extern unsigned afs_debug; 1650 1651 #define dbgprintk(FMT,...) \ 1652 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1653 1654 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1655 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1656 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1657 1658 1659 #if defined(__KDEBUG) 1660 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1661 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1662 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1663 1664 #elif defined(CONFIG_AFS_DEBUG) 1665 #define AFS_DEBUG_KENTER 0x01 1666 #define AFS_DEBUG_KLEAVE 0x02 1667 #define AFS_DEBUG_KDEBUG 0x04 1668 1669 #define _enter(FMT,...) \ 1670 do { \ 1671 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 1672 kenter(FMT,##__VA_ARGS__); \ 1673 } while (0) 1674 1675 #define _leave(FMT,...) \ 1676 do { \ 1677 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 1678 kleave(FMT,##__VA_ARGS__); \ 1679 } while (0) 1680 1681 #define _debug(FMT,...) \ 1682 do { \ 1683 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 1684 kdebug(FMT,##__VA_ARGS__); \ 1685 } while (0) 1686 1687 #else 1688 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1689 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1690 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1691 #endif 1692 1693 /* 1694 * debug assertion checking 1695 */ 1696 #if 1 // defined(__KDEBUGALL) 1697 1698 #define ASSERT(X) \ 1699 do { \ 1700 if (unlikely(!(X))) { \ 1701 printk(KERN_ERR "\n"); \ 1702 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1703 BUG(); \ 1704 } \ 1705 } while(0) 1706 1707 #define ASSERTCMP(X, OP, Y) \ 1708 do { \ 1709 if (unlikely(!((X) OP (Y)))) { \ 1710 printk(KERN_ERR "\n"); \ 1711 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1712 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1713 (unsigned long)(X), (unsigned long)(Y)); \ 1714 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1715 (unsigned long)(X), (unsigned long)(Y)); \ 1716 BUG(); \ 1717 } \ 1718 } while(0) 1719 1720 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1721 do { \ 1722 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 1723 printk(KERN_ERR "\n"); \ 1724 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1725 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 1726 (unsigned long)(L), (unsigned long)(N), \ 1727 (unsigned long)(H)); \ 1728 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 1729 (unsigned long)(L), (unsigned long)(N), \ 1730 (unsigned long)(H)); \ 1731 BUG(); \ 1732 } \ 1733 } while(0) 1734 1735 #define ASSERTIF(C, X) \ 1736 do { \ 1737 if (unlikely((C) && !(X))) { \ 1738 printk(KERN_ERR "\n"); \ 1739 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1740 BUG(); \ 1741 } \ 1742 } while(0) 1743 1744 #define ASSERTIFCMP(C, X, OP, Y) \ 1745 do { \ 1746 if (unlikely((C) && !((X) OP (Y)))) { \ 1747 printk(KERN_ERR "\n"); \ 1748 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1749 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1750 (unsigned long)(X), (unsigned long)(Y)); \ 1751 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1752 (unsigned long)(X), (unsigned long)(Y)); \ 1753 BUG(); \ 1754 } \ 1755 } while(0) 1756 1757 #else 1758 1759 #define ASSERT(X) \ 1760 do { \ 1761 } while(0) 1762 1763 #define ASSERTCMP(X, OP, Y) \ 1764 do { \ 1765 } while(0) 1766 1767 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1768 do { \ 1769 } while(0) 1770 1771 #define ASSERTIF(C, X) \ 1772 do { \ 1773 } while(0) 1774 1775 #define ASSERTIFCMP(C, X, OP, Y) \ 1776 do { \ 1777 } while(0) 1778 1779 #endif /* __KDEBUGALL */ 1780