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 #include <linux/fscache.h> 18 #include <linux/backing-dev.h> 19 #include <linux/uuid.h> 20 #include <linux/mm_types.h> 21 #include <linux/dns_resolver.h> 22 #include <net/net_namespace.h> 23 #include <net/netns/generic.h> 24 #include <net/sock.h> 25 #include <net/af_rxrpc.h> 26 27 #include "afs.h" 28 #include "afs_vl.h" 29 30 #define AFS_CELL_MAX_ADDRS 15 31 32 struct pagevec; 33 struct afs_call; 34 struct afs_vnode; 35 36 /* 37 * Partial file-locking emulation mode. (The problem being that AFS3 only 38 * allows whole-file locks and no upgrading/downgrading). 39 */ 40 enum afs_flock_mode { 41 afs_flock_mode_unset, 42 afs_flock_mode_local, /* Local locking only */ 43 afs_flock_mode_openafs, /* Don't get server lock for a partial lock */ 44 afs_flock_mode_strict, /* Always get a server lock for a partial lock */ 45 afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */ 46 }; 47 48 struct afs_fs_context { 49 bool force; /* T to force cell type */ 50 bool autocell; /* T if set auto mount operation */ 51 bool dyn_root; /* T if dynamic root */ 52 bool no_cell; /* T if the source is "none" (for dynroot) */ 53 enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */ 54 afs_voltype_t type; /* type of volume requested */ 55 unsigned int volnamesz; /* size of volume name */ 56 const char *volname; /* name of volume to mount */ 57 struct afs_net *net; /* the AFS net namespace stuff */ 58 struct afs_cell *cell; /* cell in which to find volume */ 59 struct afs_volume *volume; /* volume record */ 60 struct key *key; /* key to use for secure mounting */ 61 }; 62 63 enum afs_call_state { 64 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ 65 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ 66 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ 67 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ 68 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ 69 AFS_CALL_SV_REPLYING, /* Server: Replying */ 70 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ 71 AFS_CALL_COMPLETE, /* Completed or failed */ 72 }; 73 74 /* 75 * List of server addresses. 76 */ 77 struct afs_addr_list { 78 struct rcu_head rcu; 79 refcount_t usage; 80 u32 version; /* Version */ 81 unsigned char max_addrs; 82 unsigned char nr_addrs; 83 unsigned char preferred; /* Preferred address */ 84 unsigned char nr_ipv4; /* Number of IPv4 addresses */ 85 enum dns_record_source source:8; 86 enum dns_lookup_status status:8; 87 unsigned long failed; /* Mask of addrs that failed locally/ICMP */ 88 unsigned long responded; /* Mask of addrs that responded */ 89 struct sockaddr_rxrpc addrs[]; 90 #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8)) 91 }; 92 93 /* 94 * a record of an in-progress RxRPC call 95 */ 96 struct afs_call { 97 const struct afs_call_type *type; /* type of call */ 98 struct afs_addr_list *alist; /* Address is alist[addr_ix] */ 99 wait_queue_head_t waitq; /* processes awaiting completion */ 100 struct work_struct async_work; /* async I/O processor */ 101 struct work_struct work; /* actual work processor */ 102 struct rxrpc_call *rxcall; /* RxRPC call handle */ 103 struct key *key; /* security for this call */ 104 struct afs_net *net; /* The network namespace */ 105 struct afs_server *server; /* The fileserver record if fs op (pins ref) */ 106 struct afs_vlserver *vlserver; /* The vlserver record if vl op */ 107 void *request; /* request data (first part) */ 108 size_t iov_len; /* Size of *iter to be used */ 109 struct iov_iter def_iter; /* Default buffer/data iterator */ 110 struct iov_iter *write_iter; /* Iterator defining write to be made */ 111 struct iov_iter *iter; /* Iterator currently in use */ 112 union { /* Convenience for ->def_iter */ 113 struct kvec kvec[1]; 114 struct bio_vec bvec[1]; 115 }; 116 void *buffer; /* reply receive buffer */ 117 union { 118 long ret0; /* Value to reply with instead of 0 */ 119 struct afs_addr_list *ret_alist; 120 struct afs_vldb_entry *ret_vldb; 121 char *ret_str; 122 }; 123 struct afs_operation *op; 124 unsigned int server_index; 125 refcount_t ref; 126 enum afs_call_state state; 127 spinlock_t state_lock; 128 int error; /* error code */ 129 u32 abort_code; /* Remote abort ID or 0 */ 130 unsigned int max_lifespan; /* Maximum lifespan to set if not 0 */ 131 unsigned request_size; /* size of request data */ 132 unsigned reply_max; /* maximum size of reply */ 133 unsigned count2; /* count used in unmarshalling */ 134 unsigned char unmarshall; /* unmarshalling phase */ 135 unsigned char addr_ix; /* Address in ->alist */ 136 bool drop_ref; /* T if need to drop ref for incoming call */ 137 bool need_attention; /* T if RxRPC poked us */ 138 bool async; /* T if asynchronous */ 139 bool upgrade; /* T to request service upgrade */ 140 bool intr; /* T if interruptible */ 141 bool unmarshalling_error; /* T if an unmarshalling error occurred */ 142 u16 service_id; /* Actual service ID (after upgrade) */ 143 unsigned int debug_id; /* Trace ID */ 144 u32 operation_ID; /* operation ID for an incoming call */ 145 u32 count; /* count for use in unmarshalling */ 146 union { /* place to extract temporary data */ 147 struct { 148 __be32 tmp_u; 149 __be32 tmp; 150 } __attribute__((packed)); 151 __be64 tmp64; 152 }; 153 ktime_t issue_time; /* Time of issue of operation */ 154 }; 155 156 struct afs_call_type { 157 const char *name; 158 unsigned int op; /* Really enum afs_fs_operation */ 159 160 /* deliver request or reply data to an call 161 * - returning an error will cause the call to be aborted 162 */ 163 int (*deliver)(struct afs_call *call); 164 165 /* clean up a call */ 166 void (*destructor)(struct afs_call *call); 167 168 /* Work function */ 169 void (*work)(struct work_struct *work); 170 171 /* Call done function (gets called immediately on success or failure) */ 172 void (*done)(struct afs_call *call); 173 }; 174 175 /* 176 * Key available for writeback on a file. 177 */ 178 struct afs_wb_key { 179 refcount_t usage; 180 struct key *key; 181 struct list_head vnode_link; /* Link in vnode->wb_keys */ 182 }; 183 184 /* 185 * AFS open file information record. Pointed to by file->private_data. 186 */ 187 struct afs_file { 188 struct key *key; /* The key this file was opened with */ 189 struct afs_wb_key *wb; /* Writeback key record for this file */ 190 }; 191 192 static inline struct key *afs_file_key(struct file *file) 193 { 194 struct afs_file *af = file->private_data; 195 196 return af->key; 197 } 198 199 /* 200 * Record of an outstanding read operation on a vnode. 201 */ 202 struct afs_read { 203 loff_t pos; /* Where to start reading */ 204 loff_t len; /* How much we're asking for */ 205 loff_t actual_len; /* How much we're actually getting */ 206 loff_t file_size; /* File size returned by server */ 207 struct key *key; /* The key to use to reissue the read */ 208 struct afs_vnode *vnode; /* The file being read into. */ 209 struct netfs_io_subrequest *subreq; /* Fscache helper read request this belongs to */ 210 afs_dataversion_t data_version; /* Version number returned by server */ 211 refcount_t usage; 212 unsigned int call_debug_id; 213 unsigned int nr_pages; 214 int error; 215 void (*done)(struct afs_read *); 216 void (*cleanup)(struct afs_read *); 217 struct iov_iter *iter; /* Iterator representing the buffer */ 218 struct iov_iter def_iter; /* Default iterator */ 219 }; 220 221 /* 222 * AFS superblock private data 223 * - there's one superblock per volume 224 */ 225 struct afs_super_info { 226 struct net *net_ns; /* Network namespace */ 227 struct afs_cell *cell; /* The cell in which the volume resides */ 228 struct afs_volume *volume; /* volume record */ 229 enum afs_flock_mode flock_mode:8; /* File locking emulation mode */ 230 bool dyn_root; /* True if dynamic root */ 231 }; 232 233 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) 234 { 235 return sb->s_fs_info; 236 } 237 238 extern struct file_system_type afs_fs_type; 239 240 /* 241 * Set of substitutes for @sys. 242 */ 243 struct afs_sysnames { 244 #define AFS_NR_SYSNAME 16 245 char *subs[AFS_NR_SYSNAME]; 246 refcount_t usage; 247 unsigned short nr; 248 char blank[1]; 249 }; 250 251 /* 252 * AFS network namespace record. 253 */ 254 struct afs_net { 255 struct net *net; /* Backpointer to the owning net namespace */ 256 struct afs_uuid uuid; 257 bool live; /* F if this namespace is being removed */ 258 259 /* AF_RXRPC I/O stuff */ 260 struct socket *socket; 261 struct afs_call *spare_incoming_call; 262 struct work_struct charge_preallocation_work; 263 struct mutex socket_mutex; 264 atomic_t nr_outstanding_calls; 265 atomic_t nr_superblocks; 266 267 /* Cell database */ 268 struct rb_root cells; 269 struct afs_cell *ws_cell; 270 struct work_struct cells_manager; 271 struct timer_list cells_timer; 272 atomic_t cells_outstanding; 273 struct rw_semaphore cells_lock; 274 struct mutex cells_alias_lock; 275 276 struct mutex proc_cells_lock; 277 struct hlist_head proc_cells; 278 279 /* Known servers. Theoretically each fileserver can only be in one 280 * cell, but in practice, people create aliases and subsets and there's 281 * no easy way to distinguish them. 282 */ 283 seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */ 284 struct rb_root fs_servers; /* afs_server (by server UUID or address) */ 285 struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */ 286 struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */ 287 struct hlist_head fs_proc; /* procfs servers list */ 288 289 struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ 290 struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */ 291 seqlock_t fs_addr_lock; /* For fs_addresses[46] */ 292 293 struct work_struct fs_manager; 294 struct timer_list fs_timer; 295 296 struct work_struct fs_prober; 297 struct timer_list fs_probe_timer; 298 atomic_t servers_outstanding; 299 300 /* File locking renewal management */ 301 struct mutex lock_manager_mutex; 302 303 /* Misc */ 304 struct super_block *dynroot_sb; /* Dynamic root mount superblock */ 305 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ 306 struct afs_sysnames *sysnames; 307 rwlock_t sysnames_lock; 308 309 /* Statistics counters */ 310 atomic_t n_lookup; /* Number of lookups done */ 311 atomic_t n_reval; /* Number of dentries needing revalidation */ 312 atomic_t n_inval; /* Number of invalidations by the server */ 313 atomic_t n_relpg; /* Number of invalidations by release_folio */ 314 atomic_t n_read_dir; /* Number of directory pages read */ 315 atomic_t n_dir_cr; /* Number of directory entry creation edits */ 316 atomic_t n_dir_rm; /* Number of directory entry removal edits */ 317 atomic_t n_stores; /* Number of store ops */ 318 atomic_long_t n_store_bytes; /* Number of bytes stored */ 319 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ 320 atomic_t n_fetches; /* Number of data fetch ops */ 321 }; 322 323 extern const char afs_init_sysname[]; 324 325 enum afs_cell_state { 326 AFS_CELL_UNSET, 327 AFS_CELL_ACTIVATING, 328 AFS_CELL_ACTIVE, 329 AFS_CELL_DEACTIVATING, 330 AFS_CELL_INACTIVE, 331 AFS_CELL_FAILED, 332 AFS_CELL_REMOVED, 333 }; 334 335 /* 336 * AFS cell record. 337 * 338 * This is a tricky concept to get right as it is possible to create aliases 339 * simply by pointing AFSDB/SRV records for two names at the same set of VL 340 * servers; it is also possible to do things like setting up two sets of VL 341 * servers, one of which provides a superset of the volumes provided by the 342 * other (for internal/external division, for example). 343 * 344 * Cells only exist in the sense that (a) a cell's name maps to a set of VL 345 * servers and (b) a cell's name is used by the client to select the key to use 346 * for authentication and encryption. The cell name is not typically used in 347 * the protocol. 348 * 349 * Two cells are determined to be aliases if they have an explicit alias (YFS 350 * only), share any VL servers in common or have at least one volume in common. 351 * "In common" means that the address list of the VL servers or the fileservers 352 * share at least one endpoint. 353 */ 354 struct afs_cell { 355 union { 356 struct rcu_head rcu; 357 struct rb_node net_node; /* Node in net->cells */ 358 }; 359 struct afs_net *net; 360 struct afs_cell *alias_of; /* The cell this is an alias of */ 361 struct afs_volume *root_volume; /* The root.cell volume if there is one */ 362 struct key *anonymous_key; /* anonymous user key for this cell */ 363 struct work_struct manager; /* Manager for init/deinit/dns */ 364 struct hlist_node proc_link; /* /proc cell list link */ 365 time64_t dns_expiry; /* Time AFSDB/SRV record expires */ 366 time64_t last_inactive; /* Time of last drop of usage count */ 367 refcount_t ref; /* Struct refcount */ 368 atomic_t active; /* Active usage counter */ 369 unsigned long flags; 370 #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */ 371 #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */ 372 #define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */ 373 enum afs_cell_state state; 374 short error; 375 enum dns_record_source dns_source:8; /* Latest source of data from lookup */ 376 enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */ 377 unsigned int dns_lookup_count; /* Counter of DNS lookups */ 378 unsigned int debug_id; 379 380 /* The volumes belonging to this cell */ 381 struct rb_root volumes; /* Tree of volumes on this server */ 382 struct hlist_head proc_volumes; /* procfs volume list */ 383 seqlock_t volume_lock; /* For volumes */ 384 385 /* Active fileserver interaction state. */ 386 struct rb_root fs_servers; /* afs_server (by server UUID) */ 387 seqlock_t fs_lock; /* For fs_servers */ 388 struct rw_semaphore fs_open_mmaps_lock; 389 struct list_head fs_open_mmaps; /* List of vnodes that are mmapped */ 390 atomic_t fs_s_break; /* Counter of CB.InitCallBackState messages */ 391 392 /* VL server list. */ 393 rwlock_t vl_servers_lock; /* Lock on vl_servers */ 394 struct afs_vlserver_list __rcu *vl_servers; 395 396 u8 name_len; /* Length of name */ 397 char *name; /* Cell name, case-flattened and NUL-padded */ 398 }; 399 400 /* 401 * Volume Location server record. 402 */ 403 struct afs_vlserver { 404 struct rcu_head rcu; 405 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */ 406 unsigned long flags; 407 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ 408 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ 409 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ 410 #define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */ 411 rwlock_t lock; /* Lock on addresses */ 412 refcount_t ref; 413 unsigned int rtt; /* Server's current RTT in uS */ 414 415 /* Probe state */ 416 wait_queue_head_t probe_wq; 417 atomic_t probe_outstanding; 418 spinlock_t probe_lock; 419 struct { 420 unsigned int rtt; /* RTT in uS */ 421 u32 abort_code; 422 short error; 423 unsigned short flags; 424 #define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */ 425 #define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */ 426 #define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */ 427 #define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */ 428 } probe; 429 430 u16 port; 431 u16 name_len; /* Length of name */ 432 char name[]; /* Server name, case-flattened */ 433 }; 434 435 /* 436 * Weighted list of Volume Location servers. 437 */ 438 struct afs_vlserver_entry { 439 u16 priority; /* Preference (as SRV) */ 440 u16 weight; /* Weight (as SRV) */ 441 enum dns_record_source source:8; 442 enum dns_lookup_status status:8; 443 struct afs_vlserver *server; 444 }; 445 446 struct afs_vlserver_list { 447 struct rcu_head rcu; 448 refcount_t ref; 449 u8 nr_servers; 450 u8 index; /* Server currently in use */ 451 u8 preferred; /* Preferred server */ 452 enum dns_record_source source:8; 453 enum dns_lookup_status status:8; 454 rwlock_t lock; 455 struct afs_vlserver_entry servers[]; 456 }; 457 458 /* 459 * Cached VLDB entry. 460 * 461 * This is pointed to by cell->vldb_entries, indexed by name. 462 */ 463 struct afs_vldb_entry { 464 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ 465 466 unsigned long flags; 467 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ 468 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ 469 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ 470 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ 471 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ 472 473 uuid_t fs_server[AFS_NMAXNSERVERS]; 474 u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */ 475 u8 fs_mask[AFS_NMAXNSERVERS]; 476 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 477 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 478 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 479 short error; 480 u8 nr_servers; /* Number of server records */ 481 u8 name_len; 482 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 483 }; 484 485 /* 486 * Record of fileserver with which we're actively communicating. 487 */ 488 struct afs_server { 489 struct rcu_head rcu; 490 union { 491 uuid_t uuid; /* Server ID */ 492 struct afs_uuid _uuid; 493 }; 494 495 struct afs_addr_list __rcu *addresses; 496 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 497 struct rb_node uuid_rb; /* Link in net->fs_servers */ 498 struct afs_server __rcu *uuid_next; /* Next server with same UUID */ 499 struct afs_server *uuid_prev; /* Previous server with same UUID */ 500 struct list_head probe_link; /* Link in net->fs_probe_list */ 501 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ 502 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ 503 struct hlist_node proc_link; /* Link in net->fs_proc */ 504 struct work_struct initcb_work; /* Work for CB.InitCallBackState* */ 505 struct afs_server *gc_next; /* Next server in manager's list */ 506 time64_t unuse_time; /* Time at which last unused */ 507 unsigned long flags; 508 #define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */ 509 #define AFS_SERVER_FL_UPDATING 1 510 #define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */ 511 #define AFS_SERVER_FL_NOT_READY 4 /* The record is not ready for use */ 512 #define AFS_SERVER_FL_NOT_FOUND 5 /* VL server says no such server */ 513 #define AFS_SERVER_FL_VL_FAIL 6 /* Failed to access VL server */ 514 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ 515 #define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */ 516 #define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */ 517 #define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */ 518 #define AFS_SERVER_FL_HAS_FS64 19 /* Fileserver supports FS.{Fetch,Store}Data64 */ 519 refcount_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 refcount_t ref; 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_volume *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 netfs_inode netfs; /* Netfslib context and vfs inode */ 622 struct afs_volume *volume; /* volume on which vnode resides */ 623 struct afs_fid fid; /* the file identifier for this inode */ 624 struct afs_file_status status; /* AFS status info for this file */ 625 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ 626 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ 627 struct mutex io_lock; /* Lock for serialising I/O on this mutex */ 628 struct rw_semaphore validate_lock; /* lock for validating this vnode */ 629 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ 630 struct key *silly_key; /* Silly rename key */ 631 spinlock_t wb_lock; /* lock for wb_keys */ 632 spinlock_t lock; /* waitqueue/flags lock */ 633 unsigned long flags; 634 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ 635 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 636 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ 637 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 638 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 639 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 640 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ 641 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ 642 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ 643 #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */ 644 #define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */ 645 646 struct list_head wb_keys; /* List of keys available for writeback */ 647 struct list_head pending_locks; /* locks waiting to be granted */ 648 struct list_head granted_locks; /* locks granted on this file */ 649 struct delayed_work lock_work; /* work to be done in locking */ 650 struct key *lock_key; /* Key to be used in lock ops */ 651 ktime_t locked_at; /* Time at which lock obtained */ 652 enum afs_lock_state lock_state : 8; 653 afs_lock_type_t lock_type : 8; 654 655 /* outstanding callback notification on this file */ 656 struct work_struct cb_work; /* Work for mmap'd files */ 657 struct list_head cb_mmap_link; /* Link in cell->fs_open_mmaps */ 658 void *cb_server; /* Server with callback/filelock */ 659 atomic_t cb_nr_mmap; /* Number of mmaps */ 660 unsigned int cb_fs_s_break; /* Mass server break counter (cell->fs_s_break) */ 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 netfs_i_cookie(&vnode->netfs); 673 #else 674 return NULL; 675 #endif 676 } 677 678 static inline void afs_vnode_set_cache(struct afs_vnode *vnode, 679 struct fscache_cookie *cookie) 680 { 681 #ifdef CONFIG_AFS_FSCACHE 682 vnode->netfs.cache = cookie; 683 #endif 684 } 685 686 /* 687 * cached security record for one user's attempt to access a vnode 688 */ 689 struct afs_permit { 690 struct key *key; /* RxRPC ticket holding a security context */ 691 afs_access_t access; /* CallerAccess value for this key */ 692 }; 693 694 /* 695 * Immutable cache of CallerAccess records from attempts to access vnodes. 696 * These may be shared between multiple vnodes. 697 */ 698 struct afs_permits { 699 struct rcu_head rcu; 700 struct hlist_node hash_node; /* Link in hash */ 701 unsigned long h; /* Hash value for this permit list */ 702 refcount_t usage; 703 unsigned short nr_permits; /* Number of records */ 704 bool invalidated; /* Invalidated due to key change */ 705 struct afs_permit permits[]; /* List of permits sorted by key pointer */ 706 }; 707 708 /* 709 * Error prioritisation and accumulation. 710 */ 711 struct afs_error { 712 short error; /* Accumulated error */ 713 bool responded; /* T if server responded */ 714 }; 715 716 /* 717 * Cursor for iterating over a server's address list. 718 */ 719 struct afs_addr_cursor { 720 struct afs_addr_list *alist; /* Current address list (pins ref) */ 721 unsigned long tried; /* Tried addresses */ 722 signed char index; /* Current address */ 723 bool responded; /* T if the current address responded */ 724 unsigned short nr_iterations; /* Number of address iterations */ 725 short error; 726 u32 abort_code; 727 }; 728 729 /* 730 * Cursor for iterating over a set of volume location servers. 731 */ 732 struct afs_vl_cursor { 733 struct afs_addr_cursor ac; 734 struct afs_cell *cell; /* The cell we're querying */ 735 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ 736 struct afs_vlserver *server; /* Server on which this resides */ 737 struct key *key; /* Key for the server */ 738 unsigned long untried; /* Bitmask of untried servers */ 739 short index; /* Current server */ 740 short error; 741 unsigned short flags; 742 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ 743 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ 744 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ 745 unsigned short nr_iterations; /* Number of server iterations */ 746 }; 747 748 /* 749 * Fileserver operation methods. 750 */ 751 struct afs_operation_ops { 752 void (*issue_afs_rpc)(struct afs_operation *op); 753 void (*issue_yfs_rpc)(struct afs_operation *op); 754 void (*success)(struct afs_operation *op); 755 void (*aborted)(struct afs_operation *op); 756 void (*failed)(struct afs_operation *op); 757 void (*edit_dir)(struct afs_operation *op); 758 void (*put)(struct afs_operation *op); 759 }; 760 761 struct afs_vnode_param { 762 struct afs_vnode *vnode; 763 struct afs_fid fid; /* Fid to access */ 764 struct afs_status_cb scb; /* Returned status and callback promise */ 765 afs_dataversion_t dv_before; /* Data version before the call */ 766 unsigned int cb_break_before; /* cb_break + cb_s_break before the call */ 767 u8 dv_delta; /* Expected change in data version */ 768 bool put_vnode:1; /* T if we have a ref on the vnode */ 769 bool need_io_lock:1; /* T if we need the I/O lock on this */ 770 bool update_ctime:1; /* Need to update the ctime */ 771 bool set_size:1; /* Must update i_size */ 772 bool op_unlinked:1; /* True if file was unlinked by op */ 773 bool speculative:1; /* T if speculative status fetch (no vnode lock) */ 774 bool modification:1; /* Set if the content gets modified */ 775 }; 776 777 /* 778 * Fileserver operation wrapper, handling server and address rotation 779 * asynchronously. May make simultaneous calls to multiple servers. 780 */ 781 struct afs_operation { 782 struct afs_net *net; /* Network namespace */ 783 struct key *key; /* Key for the cell */ 784 const struct afs_call_type *type; /* Type of call done */ 785 const struct afs_operation_ops *ops; 786 787 /* Parameters/results for the operation */ 788 struct afs_volume *volume; /* Volume being accessed */ 789 struct afs_vnode_param file[2]; 790 struct afs_vnode_param *more_files; 791 struct afs_volsync volsync; 792 struct dentry *dentry; /* Dentry to be altered */ 793 struct dentry *dentry_2; /* Second dentry to be altered */ 794 struct timespec64 mtime; /* Modification time to record */ 795 struct timespec64 ctime; /* Change time to set */ 796 short nr_files; /* Number of entries in file[], more_files */ 797 short error; 798 unsigned int debug_id; 799 800 unsigned int cb_v_break; /* Volume break counter before op */ 801 unsigned int cb_s_break; /* Server break counter before op */ 802 803 union { 804 struct { 805 int which; /* Which ->file[] to fetch for */ 806 } fetch_status; 807 struct { 808 int reason; /* enum afs_edit_dir_reason */ 809 mode_t mode; 810 const char *symlink; 811 } create; 812 struct { 813 bool need_rehash; 814 } unlink; 815 struct { 816 struct dentry *rehash; 817 struct dentry *tmp; 818 bool new_negative; 819 } rename; 820 struct { 821 struct afs_read *req; 822 } fetch; 823 struct { 824 afs_lock_type_t type; 825 } lock; 826 struct { 827 struct iov_iter *write_iter; 828 loff_t pos; 829 loff_t size; 830 loff_t i_size; 831 bool laundering; /* Laundering page, PG_writeback not set */ 832 } store; 833 struct { 834 struct iattr *attr; 835 loff_t old_i_size; 836 } setattr; 837 struct afs_acl *acl; 838 struct yfs_acl *yacl; 839 struct { 840 struct afs_volume_status vs; 841 struct kstatfs *buf; 842 } volstatus; 843 }; 844 845 /* Fileserver iteration state */ 846 struct afs_addr_cursor ac; 847 struct afs_server_list *server_list; /* Current server list (pins ref) */ 848 struct afs_server *server; /* Server we're using (ref pinned by server_list) */ 849 struct afs_call *call; 850 unsigned long untried; /* Bitmask of untried servers */ 851 short index; /* Current server */ 852 unsigned short nr_iterations; /* Number of server iterations */ 853 854 unsigned int flags; 855 #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ 856 #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ 857 #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ 858 #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ 859 #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ 860 #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ 861 #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ 862 #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ 863 #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ 864 #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ 865 #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ 866 #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ 867 #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ 868 }; 869 870 /* 871 * Cache auxiliary data. 872 */ 873 struct afs_vnode_cache_aux { 874 __be64 data_version; 875 } __packed; 876 877 static inline void afs_set_cache_aux(struct afs_vnode *vnode, 878 struct afs_vnode_cache_aux *aux) 879 { 880 aux->data_version = cpu_to_be64(vnode->status.data_version); 881 } 882 883 static inline void afs_invalidate_cache(struct afs_vnode *vnode, unsigned int flags) 884 { 885 struct afs_vnode_cache_aux aux; 886 887 afs_set_cache_aux(vnode, &aux); 888 fscache_invalidate(afs_vnode_cache(vnode), &aux, 889 i_size_read(&vnode->netfs.inode), flags); 890 } 891 892 /* 893 * We use folio->private to hold the amount of the folio that we've written to, 894 * splitting the field into two parts. However, we need to represent a range 895 * 0...FOLIO_SIZE, so we reduce the resolution if the size of the folio 896 * exceeds what we can encode. 897 */ 898 #ifdef CONFIG_64BIT 899 #define __AFS_FOLIO_PRIV_MASK 0x7fffffffUL 900 #define __AFS_FOLIO_PRIV_SHIFT 32 901 #define __AFS_FOLIO_PRIV_MMAPPED 0x80000000UL 902 #else 903 #define __AFS_FOLIO_PRIV_MASK 0x7fffUL 904 #define __AFS_FOLIO_PRIV_SHIFT 16 905 #define __AFS_FOLIO_PRIV_MMAPPED 0x8000UL 906 #endif 907 908 static inline unsigned int afs_folio_dirty_resolution(struct folio *folio) 909 { 910 int shift = folio_shift(folio) - (__AFS_FOLIO_PRIV_SHIFT - 1); 911 return (shift > 0) ? shift : 0; 912 } 913 914 static inline size_t afs_folio_dirty_from(struct folio *folio, unsigned long priv) 915 { 916 unsigned long x = priv & __AFS_FOLIO_PRIV_MASK; 917 918 /* The lower bound is inclusive */ 919 return x << afs_folio_dirty_resolution(folio); 920 } 921 922 static inline size_t afs_folio_dirty_to(struct folio *folio, unsigned long priv) 923 { 924 unsigned long x = (priv >> __AFS_FOLIO_PRIV_SHIFT) & __AFS_FOLIO_PRIV_MASK; 925 926 /* The upper bound is immediately beyond the region */ 927 return (x + 1) << afs_folio_dirty_resolution(folio); 928 } 929 930 static inline unsigned long afs_folio_dirty(struct folio *folio, size_t from, size_t to) 931 { 932 unsigned int res = afs_folio_dirty_resolution(folio); 933 from >>= res; 934 to = (to - 1) >> res; 935 return (to << __AFS_FOLIO_PRIV_SHIFT) | from; 936 } 937 938 static inline unsigned long afs_folio_dirty_mmapped(unsigned long priv) 939 { 940 return priv | __AFS_FOLIO_PRIV_MMAPPED; 941 } 942 943 static inline bool afs_is_folio_dirty_mmapped(unsigned long priv) 944 { 945 return priv & __AFS_FOLIO_PRIV_MMAPPED; 946 } 947 948 #include <trace/events/afs.h> 949 950 /*****************************************************************************/ 951 /* 952 * addr_list.c 953 */ 954 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) 955 { 956 if (alist) 957 refcount_inc(&alist->usage); 958 return alist; 959 } 960 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, 961 unsigned short, 962 unsigned short); 963 extern void afs_put_addrlist(struct afs_addr_list *); 964 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, 965 const char *, size_t, char, 966 unsigned short, unsigned short); 967 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); 968 extern bool afs_iterate_addresses(struct afs_addr_cursor *); 969 extern int afs_end_cursor(struct afs_addr_cursor *); 970 971 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); 972 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); 973 974 /* 975 * cache.c 976 */ 977 #ifdef CONFIG_AFS_FSCACHE 978 extern struct fscache_netfs afs_cache_netfs; 979 #endif 980 981 /* 982 * callback.c 983 */ 984 extern void afs_invalidate_mmap_work(struct work_struct *); 985 extern void afs_server_init_callback_work(struct work_struct *work); 986 extern void afs_init_callback_state(struct afs_server *); 987 extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 988 extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 989 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); 990 991 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) 992 { 993 return vnode->cb_break + vnode->cb_v_break; 994 } 995 996 static inline bool afs_cb_is_broken(unsigned int cb_break, 997 const struct afs_vnode *vnode) 998 { 999 return cb_break != (vnode->cb_break + vnode->volume->cb_v_break); 1000 } 1001 1002 /* 1003 * cell.c 1004 */ 1005 extern int afs_cell_init(struct afs_net *, const char *); 1006 extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, 1007 enum afs_cell_trace); 1008 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, 1009 const char *, bool); 1010 extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); 1011 extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace); 1012 extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); 1013 extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); 1014 extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); 1015 extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); 1016 extern void afs_manage_cells(struct work_struct *); 1017 extern void afs_cells_timer(struct timer_list *); 1018 extern void __net_exit afs_cell_purge(struct afs_net *); 1019 1020 /* 1021 * cmservice.c 1022 */ 1023 extern bool afs_cm_incoming_call(struct afs_call *); 1024 1025 /* 1026 * dir.c 1027 */ 1028 extern const struct file_operations afs_dir_file_operations; 1029 extern const struct inode_operations afs_dir_inode_operations; 1030 extern const struct address_space_operations afs_dir_aops; 1031 extern const struct dentry_operations afs_fs_dentry_operations; 1032 1033 extern void afs_d_release(struct dentry *); 1034 extern void afs_check_for_remote_deletion(struct afs_operation *); 1035 1036 /* 1037 * dir_edit.c 1038 */ 1039 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, 1040 enum afs_edit_dir_reason); 1041 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); 1042 1043 /* 1044 * dir_silly.c 1045 */ 1046 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, 1047 struct dentry *, struct key *); 1048 extern int afs_silly_iput(struct dentry *, struct inode *); 1049 1050 /* 1051 * dynroot.c 1052 */ 1053 extern const struct inode_operations afs_dynroot_inode_operations; 1054 extern const struct dentry_operations afs_dynroot_dentry_operations; 1055 1056 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); 1057 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); 1058 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); 1059 extern int afs_dynroot_populate(struct super_block *); 1060 extern void afs_dynroot_depopulate(struct super_block *); 1061 1062 /* 1063 * file.c 1064 */ 1065 extern const struct address_space_operations afs_file_aops; 1066 extern const struct address_space_operations afs_symlink_aops; 1067 extern const struct inode_operations afs_file_inode_operations; 1068 extern const struct file_operations afs_file_operations; 1069 extern const struct netfs_request_ops afs_req_ops; 1070 1071 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); 1072 extern void afs_put_wb_key(struct afs_wb_key *); 1073 extern int afs_open(struct inode *, struct file *); 1074 extern int afs_release(struct inode *, struct file *); 1075 extern int afs_fetch_data(struct afs_vnode *, struct afs_read *); 1076 extern struct afs_read *afs_alloc_read(gfp_t); 1077 extern void afs_put_read(struct afs_read *); 1078 extern int afs_write_inode(struct inode *, struct writeback_control *); 1079 1080 static inline struct afs_read *afs_get_read(struct afs_read *req) 1081 { 1082 refcount_inc(&req->usage); 1083 return req; 1084 } 1085 1086 /* 1087 * flock.c 1088 */ 1089 extern struct workqueue_struct *afs_lock_manager; 1090 1091 extern void afs_lock_op_done(struct afs_call *); 1092 extern void afs_lock_work(struct work_struct *); 1093 extern void afs_lock_may_be_available(struct afs_vnode *); 1094 extern int afs_lock(struct file *, int, struct file_lock *); 1095 extern int afs_flock(struct file *, int, struct file_lock *); 1096 1097 /* 1098 * fsclient.c 1099 */ 1100 extern void afs_fs_fetch_status(struct afs_operation *); 1101 extern void afs_fs_fetch_data(struct afs_operation *); 1102 extern void afs_fs_create_file(struct afs_operation *); 1103 extern void afs_fs_make_dir(struct afs_operation *); 1104 extern void afs_fs_remove_file(struct afs_operation *); 1105 extern void afs_fs_remove_dir(struct afs_operation *); 1106 extern void afs_fs_link(struct afs_operation *); 1107 extern void afs_fs_symlink(struct afs_operation *); 1108 extern void afs_fs_rename(struct afs_operation *); 1109 extern void afs_fs_store_data(struct afs_operation *); 1110 extern void afs_fs_setattr(struct afs_operation *); 1111 extern void afs_fs_get_volume_status(struct afs_operation *); 1112 extern void afs_fs_set_lock(struct afs_operation *); 1113 extern void afs_fs_extend_lock(struct afs_operation *); 1114 extern void afs_fs_release_lock(struct afs_operation *); 1115 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, 1116 struct afs_addr_cursor *, struct key *); 1117 extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *, 1118 struct afs_addr_cursor *, struct key *); 1119 extern void afs_fs_inline_bulk_status(struct afs_operation *); 1120 1121 struct afs_acl { 1122 u32 size; 1123 u8 data[]; 1124 }; 1125 1126 extern void afs_fs_fetch_acl(struct afs_operation *); 1127 extern void afs_fs_store_acl(struct afs_operation *); 1128 1129 /* 1130 * fs_operation.c 1131 */ 1132 extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); 1133 extern int afs_put_operation(struct afs_operation *); 1134 extern bool afs_begin_vnode_operation(struct afs_operation *); 1135 extern void afs_wait_for_operation(struct afs_operation *); 1136 extern int afs_do_sync_operation(struct afs_operation *); 1137 1138 static inline void afs_op_nomem(struct afs_operation *op) 1139 { 1140 op->error = -ENOMEM; 1141 } 1142 1143 static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, 1144 struct afs_vnode *vnode) 1145 { 1146 op->file[n].vnode = vnode; 1147 op->file[n].need_io_lock = true; 1148 } 1149 1150 static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, 1151 const struct afs_fid *fid) 1152 { 1153 op->file[n].fid = *fid; 1154 } 1155 1156 /* 1157 * fs_probe.c 1158 */ 1159 extern void afs_fileserver_probe_result(struct afs_call *); 1160 extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool); 1161 extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long); 1162 extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); 1163 extern void afs_fs_probe_dispatcher(struct work_struct *); 1164 extern int afs_wait_for_one_fs_probe(struct afs_server *, bool); 1165 extern void afs_fs_probe_cleanup(struct afs_net *); 1166 1167 /* 1168 * inode.c 1169 */ 1170 extern const struct afs_operation_ops afs_fetch_status_operation; 1171 1172 extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); 1173 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); 1174 extern int afs_ilookup5_test_by_fid(struct inode *, void *); 1175 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); 1176 extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); 1177 extern struct inode *afs_root_iget(struct super_block *, struct key *); 1178 extern bool afs_check_validity(struct afs_vnode *); 1179 extern int afs_validate(struct afs_vnode *, struct key *); 1180 extern int afs_getattr(struct user_namespace *mnt_userns, const struct path *, 1181 struct kstat *, u32, unsigned int); 1182 extern int afs_setattr(struct user_namespace *mnt_userns, struct dentry *, struct iattr *); 1183 extern void afs_evict_inode(struct inode *); 1184 extern int afs_drop_inode(struct inode *); 1185 1186 /* 1187 * main.c 1188 */ 1189 extern struct workqueue_struct *afs_wq; 1190 extern int afs_net_id; 1191 1192 static inline struct afs_net *afs_net(struct net *net) 1193 { 1194 return net_generic(net, afs_net_id); 1195 } 1196 1197 static inline struct afs_net *afs_sb2net(struct super_block *sb) 1198 { 1199 return afs_net(AFS_FS_S(sb)->net_ns); 1200 } 1201 1202 static inline struct afs_net *afs_d2net(struct dentry *dentry) 1203 { 1204 return afs_sb2net(dentry->d_sb); 1205 } 1206 1207 static inline struct afs_net *afs_i2net(struct inode *inode) 1208 { 1209 return afs_sb2net(inode->i_sb); 1210 } 1211 1212 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 1213 { 1214 return afs_i2net(&vnode->netfs.inode); 1215 } 1216 1217 static inline struct afs_net *afs_sock2net(struct sock *sk) 1218 { 1219 return net_generic(sock_net(sk), afs_net_id); 1220 } 1221 1222 static inline void __afs_stat(atomic_t *s) 1223 { 1224 atomic_inc(s); 1225 } 1226 1227 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) 1228 1229 /* 1230 * misc.c 1231 */ 1232 extern int afs_abort_to_error(u32); 1233 extern void afs_prioritise_error(struct afs_error *, int, u32); 1234 1235 /* 1236 * mntpt.c 1237 */ 1238 extern const struct inode_operations afs_mntpt_inode_operations; 1239 extern const struct inode_operations afs_autocell_inode_operations; 1240 extern const struct file_operations afs_mntpt_file_operations; 1241 1242 extern struct vfsmount *afs_d_automount(struct path *); 1243 extern void afs_mntpt_kill_timer(void); 1244 1245 /* 1246 * proc.c 1247 */ 1248 #ifdef CONFIG_PROC_FS 1249 extern int __net_init afs_proc_init(struct afs_net *); 1250 extern void __net_exit afs_proc_cleanup(struct afs_net *); 1251 extern int afs_proc_cell_setup(struct afs_cell *); 1252 extern void afs_proc_cell_remove(struct afs_cell *); 1253 extern void afs_put_sysnames(struct afs_sysnames *); 1254 #else 1255 static inline int afs_proc_init(struct afs_net *net) { return 0; } 1256 static inline void afs_proc_cleanup(struct afs_net *net) {} 1257 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } 1258 static inline void afs_proc_cell_remove(struct afs_cell *cell) {} 1259 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} 1260 #endif 1261 1262 /* 1263 * rotate.c 1264 */ 1265 extern bool afs_select_fileserver(struct afs_operation *); 1266 extern void afs_dump_edestaddrreq(const struct afs_operation *); 1267 1268 /* 1269 * rxrpc.c 1270 */ 1271 extern struct workqueue_struct *afs_async_calls; 1272 1273 extern int __net_init afs_open_socket(struct afs_net *); 1274 extern void __net_exit afs_close_socket(struct afs_net *); 1275 extern void afs_charge_preallocation(struct work_struct *); 1276 extern void afs_put_call(struct afs_call *); 1277 extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t); 1278 extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *); 1279 extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 1280 const struct afs_call_type *, 1281 size_t, size_t); 1282 extern void afs_flat_call_destructor(struct afs_call *); 1283 extern void afs_send_empty_reply(struct afs_call *); 1284 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 1285 extern int afs_extract_data(struct afs_call *, bool); 1286 extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); 1287 1288 static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, 1289 gfp_t gfp) 1290 { 1291 op->call = call; 1292 op->type = call->type; 1293 call->op = op; 1294 call->key = op->key; 1295 call->intr = !(op->flags & AFS_OPERATION_UNINTR); 1296 afs_make_call(&op->ac, call, gfp); 1297 } 1298 1299 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) 1300 { 1301 call->iov_len = size; 1302 call->kvec[0].iov_base = buf; 1303 call->kvec[0].iov_len = size; 1304 iov_iter_kvec(&call->def_iter, READ, call->kvec, 1, size); 1305 } 1306 1307 static inline void afs_extract_to_tmp(struct afs_call *call) 1308 { 1309 call->iov_len = sizeof(call->tmp); 1310 afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); 1311 } 1312 1313 static inline void afs_extract_to_tmp64(struct afs_call *call) 1314 { 1315 call->iov_len = sizeof(call->tmp64); 1316 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); 1317 } 1318 1319 static inline void afs_extract_discard(struct afs_call *call, size_t size) 1320 { 1321 call->iov_len = size; 1322 iov_iter_discard(&call->def_iter, READ, size); 1323 } 1324 1325 static inline void afs_extract_to_buf(struct afs_call *call, size_t size) 1326 { 1327 call->iov_len = size; 1328 afs_extract_begin(call, call->buffer, size); 1329 } 1330 1331 static inline int afs_transfer_reply(struct afs_call *call) 1332 { 1333 return afs_extract_data(call, false); 1334 } 1335 1336 static inline bool afs_check_call_state(struct afs_call *call, 1337 enum afs_call_state state) 1338 { 1339 return READ_ONCE(call->state) == state; 1340 } 1341 1342 static inline bool afs_set_call_state(struct afs_call *call, 1343 enum afs_call_state from, 1344 enum afs_call_state to) 1345 { 1346 bool ok = false; 1347 1348 spin_lock_bh(&call->state_lock); 1349 if (call->state == from) { 1350 call->state = to; 1351 trace_afs_call_state(call, from, to, 0, 0); 1352 ok = true; 1353 } 1354 spin_unlock_bh(&call->state_lock); 1355 return ok; 1356 } 1357 1358 static inline void afs_set_call_complete(struct afs_call *call, 1359 int error, u32 remote_abort) 1360 { 1361 enum afs_call_state state; 1362 bool ok = false; 1363 1364 spin_lock_bh(&call->state_lock); 1365 state = call->state; 1366 if (state != AFS_CALL_COMPLETE) { 1367 call->abort_code = remote_abort; 1368 call->error = error; 1369 call->state = AFS_CALL_COMPLETE; 1370 trace_afs_call_state(call, state, AFS_CALL_COMPLETE, 1371 error, remote_abort); 1372 ok = true; 1373 } 1374 spin_unlock_bh(&call->state_lock); 1375 if (ok) { 1376 trace_afs_call_done(call); 1377 1378 /* Asynchronous calls have two refs to release - one from the alloc and 1379 * one queued with the work item - and we can't just deallocate the 1380 * call because the work item may be queued again. 1381 */ 1382 if (call->drop_ref) 1383 afs_put_call(call); 1384 } 1385 } 1386 1387 /* 1388 * security.c 1389 */ 1390 extern void afs_put_permits(struct afs_permits *); 1391 extern void afs_clear_permits(struct afs_vnode *); 1392 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, 1393 struct afs_status_cb *); 1394 extern void afs_zap_permits(struct rcu_head *); 1395 extern struct key *afs_request_key(struct afs_cell *); 1396 extern struct key *afs_request_key_rcu(struct afs_cell *); 1397 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); 1398 extern int afs_permission(struct user_namespace *, struct inode *, int); 1399 extern void __exit afs_clean_up_permit_cache(void); 1400 1401 /* 1402 * server.c 1403 */ 1404 extern spinlock_t afs_server_peer_lock; 1405 1406 extern struct afs_server *afs_find_server(struct afs_net *, 1407 const struct sockaddr_rxrpc *); 1408 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); 1409 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); 1410 extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); 1411 extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace); 1412 extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1413 extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace); 1414 extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1415 extern void afs_manage_servers(struct work_struct *); 1416 extern void afs_servers_timer(struct timer_list *); 1417 extern void afs_fs_probe_timer(struct timer_list *); 1418 extern void __net_exit afs_purge_servers(struct afs_net *); 1419 extern bool afs_check_server_record(struct afs_operation *, struct afs_server *); 1420 1421 static inline void afs_inc_servers_outstanding(struct afs_net *net) 1422 { 1423 atomic_inc(&net->servers_outstanding); 1424 } 1425 1426 static inline void afs_dec_servers_outstanding(struct afs_net *net) 1427 { 1428 if (atomic_dec_and_test(&net->servers_outstanding)) 1429 wake_up_var(&net->servers_outstanding); 1430 } 1431 1432 static inline bool afs_is_probing_server(struct afs_server *server) 1433 { 1434 return list_empty(&server->probe_link); 1435 } 1436 1437 /* 1438 * server_list.c 1439 */ 1440 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) 1441 { 1442 refcount_inc(&slist->usage); 1443 return slist; 1444 } 1445 1446 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); 1447 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, 1448 struct afs_vldb_entry *, 1449 u8); 1450 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); 1451 1452 /* 1453 * super.c 1454 */ 1455 extern int __init afs_fs_init(void); 1456 extern void afs_fs_exit(void); 1457 1458 /* 1459 * vlclient.c 1460 */ 1461 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, 1462 const char *, int); 1463 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); 1464 extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, 1465 struct key *, struct afs_vlserver *, unsigned int); 1466 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); 1467 extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); 1468 1469 /* 1470 * vl_alias.c 1471 */ 1472 extern int afs_cell_detect_alias(struct afs_cell *, struct key *); 1473 1474 /* 1475 * vl_probe.c 1476 */ 1477 extern void afs_vlserver_probe_result(struct afs_call *); 1478 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); 1479 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); 1480 1481 /* 1482 * vl_rotate.c 1483 */ 1484 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, 1485 struct afs_cell *, struct key *); 1486 extern bool afs_select_vlserver(struct afs_vl_cursor *); 1487 extern bool afs_select_current_vlserver(struct afs_vl_cursor *); 1488 extern int afs_end_vlserver_operation(struct afs_vl_cursor *); 1489 1490 /* 1491 * vlserver_list.c 1492 */ 1493 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) 1494 { 1495 refcount_inc(&vlserver->ref); 1496 return vlserver; 1497 } 1498 1499 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) 1500 { 1501 if (vllist) 1502 refcount_inc(&vllist->ref); 1503 return vllist; 1504 } 1505 1506 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); 1507 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); 1508 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); 1509 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); 1510 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, 1511 const void *, size_t); 1512 1513 /* 1514 * volume.c 1515 */ 1516 extern struct afs_volume *afs_create_volume(struct afs_fs_context *); 1517 extern int afs_activate_volume(struct afs_volume *); 1518 extern void afs_deactivate_volume(struct afs_volume *); 1519 extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); 1520 extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace); 1521 extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); 1522 1523 /* 1524 * write.c 1525 */ 1526 #ifdef CONFIG_AFS_FSCACHE 1527 bool afs_dirty_folio(struct address_space *, struct folio *); 1528 #else 1529 #define afs_dirty_folio filemap_dirty_folio 1530 #endif 1531 extern int afs_write_begin(struct file *file, struct address_space *mapping, 1532 loff_t pos, unsigned len, 1533 struct page **pagep, void **fsdata); 1534 extern int afs_write_end(struct file *file, struct address_space *mapping, 1535 loff_t pos, unsigned len, unsigned copied, 1536 struct page *page, void *fsdata); 1537 extern int afs_writepage(struct page *, struct writeback_control *); 1538 extern int afs_writepages(struct address_space *, struct writeback_control *); 1539 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); 1540 extern int afs_fsync(struct file *, loff_t, loff_t, int); 1541 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); 1542 extern void afs_prune_wb_keys(struct afs_vnode *); 1543 int afs_launder_folio(struct folio *); 1544 1545 /* 1546 * xattr.c 1547 */ 1548 extern const struct xattr_handler *afs_xattr_handlers[]; 1549 1550 /* 1551 * yfsclient.c 1552 */ 1553 extern void yfs_fs_fetch_data(struct afs_operation *); 1554 extern void yfs_fs_create_file(struct afs_operation *); 1555 extern void yfs_fs_make_dir(struct afs_operation *); 1556 extern void yfs_fs_remove_file2(struct afs_operation *); 1557 extern void yfs_fs_remove_file(struct afs_operation *); 1558 extern void yfs_fs_remove_dir(struct afs_operation *); 1559 extern void yfs_fs_link(struct afs_operation *); 1560 extern void yfs_fs_symlink(struct afs_operation *); 1561 extern void yfs_fs_rename(struct afs_operation *); 1562 extern void yfs_fs_store_data(struct afs_operation *); 1563 extern void yfs_fs_setattr(struct afs_operation *); 1564 extern void yfs_fs_get_volume_status(struct afs_operation *); 1565 extern void yfs_fs_set_lock(struct afs_operation *); 1566 extern void yfs_fs_extend_lock(struct afs_operation *); 1567 extern void yfs_fs_release_lock(struct afs_operation *); 1568 extern void yfs_fs_fetch_status(struct afs_operation *); 1569 extern void yfs_fs_inline_bulk_status(struct afs_operation *); 1570 1571 struct yfs_acl { 1572 struct afs_acl *acl; /* Dir/file/symlink ACL */ 1573 struct afs_acl *vol_acl; /* Whole volume ACL */ 1574 u32 inherit_flag; /* True if ACL is inherited from parent dir */ 1575 u32 num_cleaned; /* Number of ACEs removed due to subject removal */ 1576 unsigned int flags; 1577 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ 1578 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ 1579 }; 1580 1581 extern void yfs_free_opaque_acl(struct yfs_acl *); 1582 extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); 1583 extern void yfs_fs_store_opaque_acl2(struct afs_operation *); 1584 1585 /* 1586 * Miscellaneous inline functions. 1587 */ 1588 static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 1589 { 1590 return container_of(inode, struct afs_vnode, netfs.inode); 1591 } 1592 1593 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 1594 { 1595 return &vnode->netfs.inode; 1596 } 1597 1598 /* 1599 * Note that a dentry got changed. We need to set d_fsdata to the data version 1600 * number derived from the result of the operation. It doesn't matter if 1601 * d_fsdata goes backwards as we'll just revalidate. 1602 */ 1603 static inline void afs_update_dentry_version(struct afs_operation *op, 1604 struct afs_vnode_param *dir_vp, 1605 struct dentry *dentry) 1606 { 1607 if (!op->error) 1608 dentry->d_fsdata = 1609 (void *)(unsigned long)dir_vp->scb.status.data_version; 1610 } 1611 1612 /* 1613 * Set the file size and block count. Estimate the number of 512 bytes blocks 1614 * used, rounded up to nearest 1K for consistency with other AFS clients. 1615 */ 1616 static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size) 1617 { 1618 i_size_write(&vnode->netfs.inode, size); 1619 vnode->netfs.inode.i_blocks = ((size + 1023) >> 10) << 1; 1620 } 1621 1622 /* 1623 * Check for a conflicting operation on a directory that we just unlinked from. 1624 * If someone managed to sneak a link or an unlink in on the file we just 1625 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). 1626 */ 1627 static inline void afs_check_dir_conflict(struct afs_operation *op, 1628 struct afs_vnode_param *dvp) 1629 { 1630 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) 1631 op->flags |= AFS_OPERATION_DIR_CONFLICT; 1632 } 1633 1634 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) 1635 { 1636 trace_afs_io_error(call->debug_id, -EIO, where); 1637 return -EIO; 1638 } 1639 1640 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) 1641 { 1642 trace_afs_file_error(vnode, -EIO, where); 1643 return -EIO; 1644 } 1645 1646 /*****************************************************************************/ 1647 /* 1648 * debug tracing 1649 */ 1650 extern unsigned afs_debug; 1651 1652 #define dbgprintk(FMT,...) \ 1653 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1654 1655 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1656 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1657 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1658 1659 1660 #if defined(__KDEBUG) 1661 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1662 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1663 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1664 1665 #elif defined(CONFIG_AFS_DEBUG) 1666 #define AFS_DEBUG_KENTER 0x01 1667 #define AFS_DEBUG_KLEAVE 0x02 1668 #define AFS_DEBUG_KDEBUG 0x04 1669 1670 #define _enter(FMT,...) \ 1671 do { \ 1672 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 1673 kenter(FMT,##__VA_ARGS__); \ 1674 } while (0) 1675 1676 #define _leave(FMT,...) \ 1677 do { \ 1678 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 1679 kleave(FMT,##__VA_ARGS__); \ 1680 } while (0) 1681 1682 #define _debug(FMT,...) \ 1683 do { \ 1684 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 1685 kdebug(FMT,##__VA_ARGS__); \ 1686 } while (0) 1687 1688 #else 1689 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1690 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1691 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1692 #endif 1693 1694 /* 1695 * debug assertion checking 1696 */ 1697 #if 1 // defined(__KDEBUGALL) 1698 1699 #define ASSERT(X) \ 1700 do { \ 1701 if (unlikely(!(X))) { \ 1702 printk(KERN_ERR "\n"); \ 1703 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1704 BUG(); \ 1705 } \ 1706 } while(0) 1707 1708 #define ASSERTCMP(X, OP, Y) \ 1709 do { \ 1710 if (unlikely(!((X) OP (Y)))) { \ 1711 printk(KERN_ERR "\n"); \ 1712 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1713 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1714 (unsigned long)(X), (unsigned long)(Y)); \ 1715 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1716 (unsigned long)(X), (unsigned long)(Y)); \ 1717 BUG(); \ 1718 } \ 1719 } while(0) 1720 1721 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1722 do { \ 1723 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 1724 printk(KERN_ERR "\n"); \ 1725 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1726 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 1727 (unsigned long)(L), (unsigned long)(N), \ 1728 (unsigned long)(H)); \ 1729 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 1730 (unsigned long)(L), (unsigned long)(N), \ 1731 (unsigned long)(H)); \ 1732 BUG(); \ 1733 } \ 1734 } while(0) 1735 1736 #define ASSERTIF(C, X) \ 1737 do { \ 1738 if (unlikely((C) && !(X))) { \ 1739 printk(KERN_ERR "\n"); \ 1740 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1741 BUG(); \ 1742 } \ 1743 } while(0) 1744 1745 #define ASSERTIFCMP(C, X, OP, Y) \ 1746 do { \ 1747 if (unlikely((C) && !((X) OP (Y)))) { \ 1748 printk(KERN_ERR "\n"); \ 1749 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1750 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1751 (unsigned long)(X), (unsigned long)(Y)); \ 1752 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1753 (unsigned long)(X), (unsigned long)(Y)); \ 1754 BUG(); \ 1755 } \ 1756 } while(0) 1757 1758 #else 1759 1760 #define ASSERT(X) \ 1761 do { \ 1762 } while(0) 1763 1764 #define ASSERTCMP(X, OP, Y) \ 1765 do { \ 1766 } while(0) 1767 1768 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1769 do { \ 1770 } while(0) 1771 1772 #define ASSERTIF(C, X) \ 1773 do { \ 1774 } while(0) 1775 1776 #define ASSERTIFCMP(C, X, OP, Y) \ 1777 do { \ 1778 } while(0) 1779 1780 #endif /* __KDEBUGALL */ 1781