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 atomic_t usage; 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 have_reply_time; /* T if have got reply_time */ 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 reply_time; /* Time of first reply packet */ 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 releasepage */ 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 atomic_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 atomic_t usage; 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 atomic_t usage; 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 atomic_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 afs_volid_t vids[AFS_MAXTYPES]; /* Volume IDs */ 557 refcount_t usage; 558 unsigned char nr_servers; 559 unsigned char preferred; /* Preferred server */ 560 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ 561 unsigned int seq; /* Set to ->servers_seq when installed */ 562 rwlock_t lock; 563 struct afs_server_entry servers[]; 564 }; 565 566 /* 567 * Live AFS volume management. 568 */ 569 struct afs_volume { 570 union { 571 struct rcu_head rcu; 572 afs_volid_t vid; /* volume ID */ 573 }; 574 atomic_t usage; 575 time64_t update_at; /* Time at which to next update */ 576 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 577 struct rb_node cell_node; /* Link in cell->volumes */ 578 struct hlist_node proc_link; /* Link in cell->proc_volumes */ 579 struct super_block __rcu *sb; /* Superblock on which inodes reside */ 580 unsigned long flags; 581 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ 582 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ 583 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ 584 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ 585 #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ 586 #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ 587 #define AFS_VOLUME_MAYBE_NO_IBULK 6 /* - T if some servers don't have InlineBulkStatus */ 588 #ifdef CONFIG_AFS_FSCACHE 589 struct fscache_volume *cache; /* Caching cookie */ 590 #endif 591 struct afs_server_list __rcu *servers; /* List of servers on which volume resides */ 592 rwlock_t servers_lock; /* Lock for ->servers */ 593 unsigned int servers_seq; /* Incremented each time ->servers changes */ 594 595 unsigned cb_v_break; /* Break-everything counter. */ 596 rwlock_t cb_v_break_lock; 597 598 afs_voltype_t type; /* type of volume */ 599 char type_force; /* force volume type (suppress R/O -> R/W) */ 600 u8 name_len; 601 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 602 }; 603 604 enum afs_lock_state { 605 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ 606 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ 607 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ 608 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ 609 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ 610 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ 611 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ 612 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */ 613 }; 614 615 /* 616 * AFS inode private data. 617 * 618 * Note that afs_alloc_inode() *must* reset anything that could incorrectly 619 * leak from one inode to another. 620 */ 621 struct afs_vnode { 622 struct { 623 /* These must be contiguous */ 624 struct inode vfs_inode; /* the VFS's inode record */ 625 struct netfs_i_context netfs_ctx; /* Netfslib context */ 626 }; 627 628 struct afs_volume *volume; /* volume on which vnode resides */ 629 struct afs_fid fid; /* the file identifier for this inode */ 630 struct afs_file_status status; /* AFS status info for this file */ 631 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ 632 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ 633 struct mutex io_lock; /* Lock for serialising I/O on this mutex */ 634 struct rw_semaphore validate_lock; /* lock for validating this vnode */ 635 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ 636 struct key *silly_key; /* Silly rename key */ 637 spinlock_t wb_lock; /* lock for wb_keys */ 638 spinlock_t lock; /* waitqueue/flags lock */ 639 unsigned long flags; 640 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ 641 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 642 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ 643 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 644 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 645 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 646 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ 647 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ 648 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ 649 #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */ 650 #define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */ 651 652 struct list_head wb_keys; /* List of keys available for writeback */ 653 struct list_head pending_locks; /* locks waiting to be granted */ 654 struct list_head granted_locks; /* locks granted on this file */ 655 struct delayed_work lock_work; /* work to be done in locking */ 656 struct key *lock_key; /* Key to be used in lock ops */ 657 ktime_t locked_at; /* Time at which lock obtained */ 658 enum afs_lock_state lock_state : 8; 659 afs_lock_type_t lock_type : 8; 660 661 /* outstanding callback notification on this file */ 662 struct work_struct cb_work; /* Work for mmap'd files */ 663 struct list_head cb_mmap_link; /* Link in cell->fs_open_mmaps */ 664 void *cb_server; /* Server with callback/filelock */ 665 atomic_t cb_nr_mmap; /* Number of mmaps */ 666 unsigned int cb_fs_s_break; /* Mass server break counter (cell->fs_s_break) */ 667 unsigned int cb_s_break; /* Mass break counter on ->server */ 668 unsigned int cb_v_break; /* Mass break counter on ->volume */ 669 unsigned int cb_break; /* Break counter on vnode */ 670 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ 671 672 time64_t cb_expires_at; /* time at which callback expires */ 673 }; 674 675 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) 676 { 677 #ifdef CONFIG_AFS_FSCACHE 678 return netfs_i_cookie(&vnode->vfs_inode); 679 #else 680 return NULL; 681 #endif 682 } 683 684 static inline void afs_vnode_set_cache(struct afs_vnode *vnode, 685 struct fscache_cookie *cookie) 686 { 687 #ifdef CONFIG_AFS_FSCACHE 688 vnode->netfs_ctx.cache = cookie; 689 #endif 690 } 691 692 /* 693 * cached security record for one user's attempt to access a vnode 694 */ 695 struct afs_permit { 696 struct key *key; /* RxRPC ticket holding a security context */ 697 afs_access_t access; /* CallerAccess value for this key */ 698 }; 699 700 /* 701 * Immutable cache of CallerAccess records from attempts to access vnodes. 702 * These may be shared between multiple vnodes. 703 */ 704 struct afs_permits { 705 struct rcu_head rcu; 706 struct hlist_node hash_node; /* Link in hash */ 707 unsigned long h; /* Hash value for this permit list */ 708 refcount_t usage; 709 unsigned short nr_permits; /* Number of records */ 710 bool invalidated; /* Invalidated due to key change */ 711 struct afs_permit permits[]; /* List of permits sorted by key pointer */ 712 }; 713 714 /* 715 * Error prioritisation and accumulation. 716 */ 717 struct afs_error { 718 short error; /* Accumulated error */ 719 bool responded; /* T if server responded */ 720 }; 721 722 /* 723 * Cursor for iterating over a server's address list. 724 */ 725 struct afs_addr_cursor { 726 struct afs_addr_list *alist; /* Current address list (pins ref) */ 727 unsigned long tried; /* Tried addresses */ 728 signed char index; /* Current address */ 729 bool responded; /* T if the current address responded */ 730 unsigned short nr_iterations; /* Number of address iterations */ 731 short error; 732 u32 abort_code; 733 }; 734 735 /* 736 * Cursor for iterating over a set of volume location servers. 737 */ 738 struct afs_vl_cursor { 739 struct afs_addr_cursor ac; 740 struct afs_cell *cell; /* The cell we're querying */ 741 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ 742 struct afs_vlserver *server; /* Server on which this resides */ 743 struct key *key; /* Key for the server */ 744 unsigned long untried; /* Bitmask of untried servers */ 745 short index; /* Current server */ 746 short error; 747 unsigned short flags; 748 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ 749 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ 750 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ 751 unsigned short nr_iterations; /* Number of server iterations */ 752 }; 753 754 /* 755 * Fileserver operation methods. 756 */ 757 struct afs_operation_ops { 758 void (*issue_afs_rpc)(struct afs_operation *op); 759 void (*issue_yfs_rpc)(struct afs_operation *op); 760 void (*success)(struct afs_operation *op); 761 void (*aborted)(struct afs_operation *op); 762 void (*failed)(struct afs_operation *op); 763 void (*edit_dir)(struct afs_operation *op); 764 void (*put)(struct afs_operation *op); 765 }; 766 767 struct afs_vnode_param { 768 struct afs_vnode *vnode; 769 struct afs_fid fid; /* Fid to access */ 770 struct afs_status_cb scb; /* Returned status and callback promise */ 771 afs_dataversion_t dv_before; /* Data version before the call */ 772 unsigned int cb_break_before; /* cb_break + cb_s_break before the call */ 773 u8 dv_delta; /* Expected change in data version */ 774 bool put_vnode:1; /* T if we have a ref on the vnode */ 775 bool need_io_lock:1; /* T if we need the I/O lock on this */ 776 bool update_ctime:1; /* Need to update the ctime */ 777 bool set_size:1; /* Must update i_size */ 778 bool op_unlinked:1; /* True if file was unlinked by op */ 779 bool speculative:1; /* T if speculative status fetch (no vnode lock) */ 780 bool modification:1; /* Set if the content gets modified */ 781 }; 782 783 /* 784 * Fileserver operation wrapper, handling server and address rotation 785 * asynchronously. May make simultaneous calls to multiple servers. 786 */ 787 struct afs_operation { 788 struct afs_net *net; /* Network namespace */ 789 struct key *key; /* Key for the cell */ 790 const struct afs_call_type *type; /* Type of call done */ 791 const struct afs_operation_ops *ops; 792 793 /* Parameters/results for the operation */ 794 struct afs_volume *volume; /* Volume being accessed */ 795 struct afs_vnode_param file[2]; 796 struct afs_vnode_param *more_files; 797 struct afs_volsync volsync; 798 struct dentry *dentry; /* Dentry to be altered */ 799 struct dentry *dentry_2; /* Second dentry to be altered */ 800 struct timespec64 mtime; /* Modification time to record */ 801 struct timespec64 ctime; /* Change time to set */ 802 short nr_files; /* Number of entries in file[], more_files */ 803 short error; 804 unsigned int debug_id; 805 806 unsigned int cb_v_break; /* Volume break counter before op */ 807 unsigned int cb_s_break; /* Server break counter before op */ 808 809 union { 810 struct { 811 int which; /* Which ->file[] to fetch for */ 812 } fetch_status; 813 struct { 814 int reason; /* enum afs_edit_dir_reason */ 815 mode_t mode; 816 const char *symlink; 817 } create; 818 struct { 819 bool need_rehash; 820 } unlink; 821 struct { 822 struct dentry *rehash; 823 struct dentry *tmp; 824 bool new_negative; 825 } rename; 826 struct { 827 struct afs_read *req; 828 } fetch; 829 struct { 830 afs_lock_type_t type; 831 } lock; 832 struct { 833 struct iov_iter *write_iter; 834 loff_t pos; 835 loff_t size; 836 loff_t i_size; 837 bool laundering; /* Laundering page, PG_writeback not set */ 838 } store; 839 struct { 840 struct iattr *attr; 841 loff_t old_i_size; 842 } setattr; 843 struct afs_acl *acl; 844 struct yfs_acl *yacl; 845 struct { 846 struct afs_volume_status vs; 847 struct kstatfs *buf; 848 } volstatus; 849 }; 850 851 /* Fileserver iteration state */ 852 struct afs_addr_cursor ac; 853 struct afs_server_list *server_list; /* Current server list (pins ref) */ 854 struct afs_server *server; /* Server we're using (ref pinned by server_list) */ 855 struct afs_call *call; 856 unsigned long untried; /* Bitmask of untried servers */ 857 short index; /* Current server */ 858 unsigned short nr_iterations; /* Number of server iterations */ 859 860 unsigned int flags; 861 #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ 862 #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ 863 #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ 864 #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ 865 #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ 866 #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ 867 #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ 868 #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ 869 #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ 870 #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ 871 #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ 872 #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ 873 #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ 874 }; 875 876 /* 877 * Cache auxiliary data. 878 */ 879 struct afs_vnode_cache_aux { 880 __be64 data_version; 881 } __packed; 882 883 static inline void afs_set_cache_aux(struct afs_vnode *vnode, 884 struct afs_vnode_cache_aux *aux) 885 { 886 aux->data_version = cpu_to_be64(vnode->status.data_version); 887 } 888 889 static inline void afs_invalidate_cache(struct afs_vnode *vnode, unsigned int flags) 890 { 891 struct afs_vnode_cache_aux aux; 892 893 afs_set_cache_aux(vnode, &aux); 894 fscache_invalidate(afs_vnode_cache(vnode), &aux, 895 i_size_read(&vnode->vfs_inode), flags); 896 } 897 898 /* 899 * We use folio->private to hold the amount of the folio that we've written to, 900 * splitting the field into two parts. However, we need to represent a range 901 * 0...FOLIO_SIZE, so we reduce the resolution if the size of the folio 902 * exceeds what we can encode. 903 */ 904 #ifdef CONFIG_64BIT 905 #define __AFS_FOLIO_PRIV_MASK 0x7fffffffUL 906 #define __AFS_FOLIO_PRIV_SHIFT 32 907 #define __AFS_FOLIO_PRIV_MMAPPED 0x80000000UL 908 #else 909 #define __AFS_FOLIO_PRIV_MASK 0x7fffUL 910 #define __AFS_FOLIO_PRIV_SHIFT 16 911 #define __AFS_FOLIO_PRIV_MMAPPED 0x8000UL 912 #endif 913 914 static inline unsigned int afs_folio_dirty_resolution(struct folio *folio) 915 { 916 int shift = folio_shift(folio) - (__AFS_FOLIO_PRIV_SHIFT - 1); 917 return (shift > 0) ? shift : 0; 918 } 919 920 static inline size_t afs_folio_dirty_from(struct folio *folio, unsigned long priv) 921 { 922 unsigned long x = priv & __AFS_FOLIO_PRIV_MASK; 923 924 /* The lower bound is inclusive */ 925 return x << afs_folio_dirty_resolution(folio); 926 } 927 928 static inline size_t afs_folio_dirty_to(struct folio *folio, unsigned long priv) 929 { 930 unsigned long x = (priv >> __AFS_FOLIO_PRIV_SHIFT) & __AFS_FOLIO_PRIV_MASK; 931 932 /* The upper bound is immediately beyond the region */ 933 return (x + 1) << afs_folio_dirty_resolution(folio); 934 } 935 936 static inline unsigned long afs_folio_dirty(struct folio *folio, size_t from, size_t to) 937 { 938 unsigned int res = afs_folio_dirty_resolution(folio); 939 from >>= res; 940 to = (to - 1) >> res; 941 return (to << __AFS_FOLIO_PRIV_SHIFT) | from; 942 } 943 944 static inline unsigned long afs_folio_dirty_mmapped(unsigned long priv) 945 { 946 return priv | __AFS_FOLIO_PRIV_MMAPPED; 947 } 948 949 static inline bool afs_is_folio_dirty_mmapped(unsigned long priv) 950 { 951 return priv & __AFS_FOLIO_PRIV_MMAPPED; 952 } 953 954 #include <trace/events/afs.h> 955 956 /*****************************************************************************/ 957 /* 958 * addr_list.c 959 */ 960 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) 961 { 962 if (alist) 963 refcount_inc(&alist->usage); 964 return alist; 965 } 966 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, 967 unsigned short, 968 unsigned short); 969 extern void afs_put_addrlist(struct afs_addr_list *); 970 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, 971 const char *, size_t, char, 972 unsigned short, unsigned short); 973 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); 974 extern bool afs_iterate_addresses(struct afs_addr_cursor *); 975 extern int afs_end_cursor(struct afs_addr_cursor *); 976 977 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); 978 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); 979 980 /* 981 * cache.c 982 */ 983 #ifdef CONFIG_AFS_FSCACHE 984 extern struct fscache_netfs afs_cache_netfs; 985 #endif 986 987 /* 988 * callback.c 989 */ 990 extern void afs_invalidate_mmap_work(struct work_struct *); 991 extern void afs_server_init_callback_work(struct work_struct *work); 992 extern void afs_init_callback_state(struct afs_server *); 993 extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 994 extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 995 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); 996 997 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) 998 { 999 return vnode->cb_break + vnode->cb_v_break; 1000 } 1001 1002 static inline bool afs_cb_is_broken(unsigned int cb_break, 1003 const struct afs_vnode *vnode) 1004 { 1005 return cb_break != (vnode->cb_break + vnode->volume->cb_v_break); 1006 } 1007 1008 /* 1009 * cell.c 1010 */ 1011 extern int afs_cell_init(struct afs_net *, const char *); 1012 extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, 1013 enum afs_cell_trace); 1014 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, 1015 const char *, bool); 1016 extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); 1017 extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace); 1018 extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); 1019 extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); 1020 extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); 1021 extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); 1022 extern void afs_manage_cells(struct work_struct *); 1023 extern void afs_cells_timer(struct timer_list *); 1024 extern void __net_exit afs_cell_purge(struct afs_net *); 1025 1026 /* 1027 * cmservice.c 1028 */ 1029 extern bool afs_cm_incoming_call(struct afs_call *); 1030 1031 /* 1032 * dir.c 1033 */ 1034 extern const struct file_operations afs_dir_file_operations; 1035 extern const struct inode_operations afs_dir_inode_operations; 1036 extern const struct address_space_operations afs_dir_aops; 1037 extern const struct dentry_operations afs_fs_dentry_operations; 1038 1039 extern void afs_d_release(struct dentry *); 1040 extern void afs_check_for_remote_deletion(struct afs_operation *); 1041 1042 /* 1043 * dir_edit.c 1044 */ 1045 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, 1046 enum afs_edit_dir_reason); 1047 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); 1048 1049 /* 1050 * dir_silly.c 1051 */ 1052 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, 1053 struct dentry *, struct key *); 1054 extern int afs_silly_iput(struct dentry *, struct inode *); 1055 1056 /* 1057 * dynroot.c 1058 */ 1059 extern const struct inode_operations afs_dynroot_inode_operations; 1060 extern const struct dentry_operations afs_dynroot_dentry_operations; 1061 1062 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); 1063 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); 1064 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); 1065 extern int afs_dynroot_populate(struct super_block *); 1066 extern void afs_dynroot_depopulate(struct super_block *); 1067 1068 /* 1069 * file.c 1070 */ 1071 extern const struct address_space_operations afs_file_aops; 1072 extern const struct address_space_operations afs_symlink_aops; 1073 extern const struct inode_operations afs_file_inode_operations; 1074 extern const struct file_operations afs_file_operations; 1075 extern const struct netfs_request_ops afs_req_ops; 1076 1077 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); 1078 extern void afs_put_wb_key(struct afs_wb_key *); 1079 extern int afs_open(struct inode *, struct file *); 1080 extern int afs_release(struct inode *, struct file *); 1081 extern int afs_fetch_data(struct afs_vnode *, struct afs_read *); 1082 extern struct afs_read *afs_alloc_read(gfp_t); 1083 extern void afs_put_read(struct afs_read *); 1084 extern int afs_write_inode(struct inode *, struct writeback_control *); 1085 1086 static inline struct afs_read *afs_get_read(struct afs_read *req) 1087 { 1088 refcount_inc(&req->usage); 1089 return req; 1090 } 1091 1092 /* 1093 * flock.c 1094 */ 1095 extern struct workqueue_struct *afs_lock_manager; 1096 1097 extern void afs_lock_op_done(struct afs_call *); 1098 extern void afs_lock_work(struct work_struct *); 1099 extern void afs_lock_may_be_available(struct afs_vnode *); 1100 extern int afs_lock(struct file *, int, struct file_lock *); 1101 extern int afs_flock(struct file *, int, struct file_lock *); 1102 1103 /* 1104 * fsclient.c 1105 */ 1106 extern void afs_fs_fetch_status(struct afs_operation *); 1107 extern void afs_fs_fetch_data(struct afs_operation *); 1108 extern void afs_fs_create_file(struct afs_operation *); 1109 extern void afs_fs_make_dir(struct afs_operation *); 1110 extern void afs_fs_remove_file(struct afs_operation *); 1111 extern void afs_fs_remove_dir(struct afs_operation *); 1112 extern void afs_fs_link(struct afs_operation *); 1113 extern void afs_fs_symlink(struct afs_operation *); 1114 extern void afs_fs_rename(struct afs_operation *); 1115 extern void afs_fs_store_data(struct afs_operation *); 1116 extern void afs_fs_setattr(struct afs_operation *); 1117 extern void afs_fs_get_volume_status(struct afs_operation *); 1118 extern void afs_fs_set_lock(struct afs_operation *); 1119 extern void afs_fs_extend_lock(struct afs_operation *); 1120 extern void afs_fs_release_lock(struct afs_operation *); 1121 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, 1122 struct afs_addr_cursor *, struct key *); 1123 extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *, 1124 struct afs_addr_cursor *, struct key *); 1125 extern void afs_fs_inline_bulk_status(struct afs_operation *); 1126 1127 struct afs_acl { 1128 u32 size; 1129 u8 data[]; 1130 }; 1131 1132 extern void afs_fs_fetch_acl(struct afs_operation *); 1133 extern void afs_fs_store_acl(struct afs_operation *); 1134 1135 /* 1136 * fs_operation.c 1137 */ 1138 extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); 1139 extern int afs_put_operation(struct afs_operation *); 1140 extern bool afs_begin_vnode_operation(struct afs_operation *); 1141 extern void afs_wait_for_operation(struct afs_operation *); 1142 extern int afs_do_sync_operation(struct afs_operation *); 1143 1144 static inline void afs_op_nomem(struct afs_operation *op) 1145 { 1146 op->error = -ENOMEM; 1147 } 1148 1149 static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, 1150 struct afs_vnode *vnode) 1151 { 1152 op->file[n].vnode = vnode; 1153 op->file[n].need_io_lock = true; 1154 } 1155 1156 static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, 1157 const struct afs_fid *fid) 1158 { 1159 op->file[n].fid = *fid; 1160 } 1161 1162 /* 1163 * fs_probe.c 1164 */ 1165 extern void afs_fileserver_probe_result(struct afs_call *); 1166 extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool); 1167 extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long); 1168 extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); 1169 extern void afs_fs_probe_dispatcher(struct work_struct *); 1170 extern int afs_wait_for_one_fs_probe(struct afs_server *, bool); 1171 extern void afs_fs_probe_cleanup(struct afs_net *); 1172 1173 /* 1174 * inode.c 1175 */ 1176 extern const struct afs_operation_ops afs_fetch_status_operation; 1177 1178 extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); 1179 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); 1180 extern int afs_ilookup5_test_by_fid(struct inode *, void *); 1181 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); 1182 extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); 1183 extern struct inode *afs_root_iget(struct super_block *, struct key *); 1184 extern bool afs_check_validity(struct afs_vnode *); 1185 extern int afs_validate(struct afs_vnode *, struct key *); 1186 extern int afs_getattr(struct user_namespace *mnt_userns, const struct path *, 1187 struct kstat *, u32, unsigned int); 1188 extern int afs_setattr(struct user_namespace *mnt_userns, struct dentry *, struct iattr *); 1189 extern void afs_evict_inode(struct inode *); 1190 extern int afs_drop_inode(struct inode *); 1191 1192 /* 1193 * main.c 1194 */ 1195 extern struct workqueue_struct *afs_wq; 1196 extern int afs_net_id; 1197 1198 static inline struct afs_net *afs_net(struct net *net) 1199 { 1200 return net_generic(net, afs_net_id); 1201 } 1202 1203 static inline struct afs_net *afs_sb2net(struct super_block *sb) 1204 { 1205 return afs_net(AFS_FS_S(sb)->net_ns); 1206 } 1207 1208 static inline struct afs_net *afs_d2net(struct dentry *dentry) 1209 { 1210 return afs_sb2net(dentry->d_sb); 1211 } 1212 1213 static inline struct afs_net *afs_i2net(struct inode *inode) 1214 { 1215 return afs_sb2net(inode->i_sb); 1216 } 1217 1218 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 1219 { 1220 return afs_i2net(&vnode->vfs_inode); 1221 } 1222 1223 static inline struct afs_net *afs_sock2net(struct sock *sk) 1224 { 1225 return net_generic(sock_net(sk), afs_net_id); 1226 } 1227 1228 static inline void __afs_stat(atomic_t *s) 1229 { 1230 atomic_inc(s); 1231 } 1232 1233 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) 1234 1235 /* 1236 * misc.c 1237 */ 1238 extern int afs_abort_to_error(u32); 1239 extern void afs_prioritise_error(struct afs_error *, int, u32); 1240 1241 /* 1242 * mntpt.c 1243 */ 1244 extern const struct inode_operations afs_mntpt_inode_operations; 1245 extern const struct inode_operations afs_autocell_inode_operations; 1246 extern const struct file_operations afs_mntpt_file_operations; 1247 1248 extern struct vfsmount *afs_d_automount(struct path *); 1249 extern void afs_mntpt_kill_timer(void); 1250 1251 /* 1252 * proc.c 1253 */ 1254 #ifdef CONFIG_PROC_FS 1255 extern int __net_init afs_proc_init(struct afs_net *); 1256 extern void __net_exit afs_proc_cleanup(struct afs_net *); 1257 extern int afs_proc_cell_setup(struct afs_cell *); 1258 extern void afs_proc_cell_remove(struct afs_cell *); 1259 extern void afs_put_sysnames(struct afs_sysnames *); 1260 #else 1261 static inline int afs_proc_init(struct afs_net *net) { return 0; } 1262 static inline void afs_proc_cleanup(struct afs_net *net) {} 1263 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } 1264 static inline void afs_proc_cell_remove(struct afs_cell *cell) {} 1265 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} 1266 #endif 1267 1268 /* 1269 * rotate.c 1270 */ 1271 extern bool afs_select_fileserver(struct afs_operation *); 1272 extern void afs_dump_edestaddrreq(const struct afs_operation *); 1273 1274 /* 1275 * rxrpc.c 1276 */ 1277 extern struct workqueue_struct *afs_async_calls; 1278 1279 extern int __net_init afs_open_socket(struct afs_net *); 1280 extern void __net_exit afs_close_socket(struct afs_net *); 1281 extern void afs_charge_preallocation(struct work_struct *); 1282 extern void afs_put_call(struct afs_call *); 1283 extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t); 1284 extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *); 1285 extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 1286 const struct afs_call_type *, 1287 size_t, size_t); 1288 extern void afs_flat_call_destructor(struct afs_call *); 1289 extern void afs_send_empty_reply(struct afs_call *); 1290 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 1291 extern int afs_extract_data(struct afs_call *, bool); 1292 extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); 1293 1294 static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, 1295 gfp_t gfp) 1296 { 1297 op->call = call; 1298 op->type = call->type; 1299 call->op = op; 1300 call->key = op->key; 1301 call->intr = !(op->flags & AFS_OPERATION_UNINTR); 1302 afs_make_call(&op->ac, call, gfp); 1303 } 1304 1305 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) 1306 { 1307 call->iov_len = size; 1308 call->kvec[0].iov_base = buf; 1309 call->kvec[0].iov_len = size; 1310 iov_iter_kvec(&call->def_iter, READ, call->kvec, 1, size); 1311 } 1312 1313 static inline void afs_extract_to_tmp(struct afs_call *call) 1314 { 1315 call->iov_len = sizeof(call->tmp); 1316 afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); 1317 } 1318 1319 static inline void afs_extract_to_tmp64(struct afs_call *call) 1320 { 1321 call->iov_len = sizeof(call->tmp64); 1322 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); 1323 } 1324 1325 static inline void afs_extract_discard(struct afs_call *call, size_t size) 1326 { 1327 call->iov_len = size; 1328 iov_iter_discard(&call->def_iter, READ, size); 1329 } 1330 1331 static inline void afs_extract_to_buf(struct afs_call *call, size_t size) 1332 { 1333 call->iov_len = size; 1334 afs_extract_begin(call, call->buffer, size); 1335 } 1336 1337 static inline int afs_transfer_reply(struct afs_call *call) 1338 { 1339 return afs_extract_data(call, false); 1340 } 1341 1342 static inline bool afs_check_call_state(struct afs_call *call, 1343 enum afs_call_state state) 1344 { 1345 return READ_ONCE(call->state) == state; 1346 } 1347 1348 static inline bool afs_set_call_state(struct afs_call *call, 1349 enum afs_call_state from, 1350 enum afs_call_state to) 1351 { 1352 bool ok = false; 1353 1354 spin_lock_bh(&call->state_lock); 1355 if (call->state == from) { 1356 call->state = to; 1357 trace_afs_call_state(call, from, to, 0, 0); 1358 ok = true; 1359 } 1360 spin_unlock_bh(&call->state_lock); 1361 return ok; 1362 } 1363 1364 static inline void afs_set_call_complete(struct afs_call *call, 1365 int error, u32 remote_abort) 1366 { 1367 enum afs_call_state state; 1368 bool ok = false; 1369 1370 spin_lock_bh(&call->state_lock); 1371 state = call->state; 1372 if (state != AFS_CALL_COMPLETE) { 1373 call->abort_code = remote_abort; 1374 call->error = error; 1375 call->state = AFS_CALL_COMPLETE; 1376 trace_afs_call_state(call, state, AFS_CALL_COMPLETE, 1377 error, remote_abort); 1378 ok = true; 1379 } 1380 spin_unlock_bh(&call->state_lock); 1381 if (ok) { 1382 trace_afs_call_done(call); 1383 1384 /* Asynchronous calls have two refs to release - one from the alloc and 1385 * one queued with the work item - and we can't just deallocate the 1386 * call because the work item may be queued again. 1387 */ 1388 if (call->drop_ref) 1389 afs_put_call(call); 1390 } 1391 } 1392 1393 /* 1394 * security.c 1395 */ 1396 extern void afs_put_permits(struct afs_permits *); 1397 extern void afs_clear_permits(struct afs_vnode *); 1398 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, 1399 struct afs_status_cb *); 1400 extern void afs_zap_permits(struct rcu_head *); 1401 extern struct key *afs_request_key(struct afs_cell *); 1402 extern struct key *afs_request_key_rcu(struct afs_cell *); 1403 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); 1404 extern int afs_permission(struct user_namespace *, struct inode *, int); 1405 extern void __exit afs_clean_up_permit_cache(void); 1406 1407 /* 1408 * server.c 1409 */ 1410 extern spinlock_t afs_server_peer_lock; 1411 1412 extern struct afs_server *afs_find_server(struct afs_net *, 1413 const struct sockaddr_rxrpc *); 1414 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); 1415 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); 1416 extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); 1417 extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace); 1418 extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1419 extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace); 1420 extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1421 extern void afs_manage_servers(struct work_struct *); 1422 extern void afs_servers_timer(struct timer_list *); 1423 extern void afs_fs_probe_timer(struct timer_list *); 1424 extern void __net_exit afs_purge_servers(struct afs_net *); 1425 extern bool afs_check_server_record(struct afs_operation *, struct afs_server *); 1426 1427 static inline void afs_inc_servers_outstanding(struct afs_net *net) 1428 { 1429 atomic_inc(&net->servers_outstanding); 1430 } 1431 1432 static inline void afs_dec_servers_outstanding(struct afs_net *net) 1433 { 1434 if (atomic_dec_and_test(&net->servers_outstanding)) 1435 wake_up_var(&net->servers_outstanding); 1436 } 1437 1438 static inline bool afs_is_probing_server(struct afs_server *server) 1439 { 1440 return list_empty(&server->probe_link); 1441 } 1442 1443 /* 1444 * server_list.c 1445 */ 1446 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) 1447 { 1448 refcount_inc(&slist->usage); 1449 return slist; 1450 } 1451 1452 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); 1453 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, 1454 struct afs_vldb_entry *, 1455 u8); 1456 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); 1457 1458 /* 1459 * super.c 1460 */ 1461 extern int __init afs_fs_init(void); 1462 extern void afs_fs_exit(void); 1463 1464 /* 1465 * vlclient.c 1466 */ 1467 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, 1468 const char *, int); 1469 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); 1470 extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, 1471 struct key *, struct afs_vlserver *, unsigned int); 1472 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); 1473 extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); 1474 1475 /* 1476 * vl_alias.c 1477 */ 1478 extern int afs_cell_detect_alias(struct afs_cell *, struct key *); 1479 1480 /* 1481 * vl_probe.c 1482 */ 1483 extern void afs_vlserver_probe_result(struct afs_call *); 1484 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); 1485 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); 1486 1487 /* 1488 * vl_rotate.c 1489 */ 1490 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, 1491 struct afs_cell *, struct key *); 1492 extern bool afs_select_vlserver(struct afs_vl_cursor *); 1493 extern bool afs_select_current_vlserver(struct afs_vl_cursor *); 1494 extern int afs_end_vlserver_operation(struct afs_vl_cursor *); 1495 1496 /* 1497 * vlserver_list.c 1498 */ 1499 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) 1500 { 1501 atomic_inc(&vlserver->usage); 1502 return vlserver; 1503 } 1504 1505 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) 1506 { 1507 if (vllist) 1508 atomic_inc(&vllist->usage); 1509 return vllist; 1510 } 1511 1512 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); 1513 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); 1514 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); 1515 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); 1516 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, 1517 const void *, size_t); 1518 1519 /* 1520 * volume.c 1521 */ 1522 extern struct afs_volume *afs_create_volume(struct afs_fs_context *); 1523 extern int afs_activate_volume(struct afs_volume *); 1524 extern void afs_deactivate_volume(struct afs_volume *); 1525 extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); 1526 extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace); 1527 extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); 1528 1529 /* 1530 * write.c 1531 */ 1532 #ifdef CONFIG_AFS_FSCACHE 1533 bool afs_dirty_folio(struct address_space *, struct folio *); 1534 #else 1535 #define afs_dirty_folio filemap_dirty_folio 1536 #endif 1537 extern int afs_write_begin(struct file *file, struct address_space *mapping, 1538 loff_t pos, unsigned len, unsigned flags, 1539 struct page **pagep, void **fsdata); 1540 extern int afs_write_end(struct file *file, struct address_space *mapping, 1541 loff_t pos, unsigned len, unsigned copied, 1542 struct page *page, void *fsdata); 1543 extern int afs_writepage(struct page *, struct writeback_control *); 1544 extern int afs_writepages(struct address_space *, struct writeback_control *); 1545 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); 1546 extern int afs_fsync(struct file *, loff_t, loff_t, int); 1547 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); 1548 extern void afs_prune_wb_keys(struct afs_vnode *); 1549 int afs_launder_folio(struct folio *); 1550 1551 /* 1552 * xattr.c 1553 */ 1554 extern const struct xattr_handler *afs_xattr_handlers[]; 1555 1556 /* 1557 * yfsclient.c 1558 */ 1559 extern void yfs_fs_fetch_data(struct afs_operation *); 1560 extern void yfs_fs_create_file(struct afs_operation *); 1561 extern void yfs_fs_make_dir(struct afs_operation *); 1562 extern void yfs_fs_remove_file2(struct afs_operation *); 1563 extern void yfs_fs_remove_file(struct afs_operation *); 1564 extern void yfs_fs_remove_dir(struct afs_operation *); 1565 extern void yfs_fs_link(struct afs_operation *); 1566 extern void yfs_fs_symlink(struct afs_operation *); 1567 extern void yfs_fs_rename(struct afs_operation *); 1568 extern void yfs_fs_store_data(struct afs_operation *); 1569 extern void yfs_fs_setattr(struct afs_operation *); 1570 extern void yfs_fs_get_volume_status(struct afs_operation *); 1571 extern void yfs_fs_set_lock(struct afs_operation *); 1572 extern void yfs_fs_extend_lock(struct afs_operation *); 1573 extern void yfs_fs_release_lock(struct afs_operation *); 1574 extern void yfs_fs_fetch_status(struct afs_operation *); 1575 extern void yfs_fs_inline_bulk_status(struct afs_operation *); 1576 1577 struct yfs_acl { 1578 struct afs_acl *acl; /* Dir/file/symlink ACL */ 1579 struct afs_acl *vol_acl; /* Whole volume ACL */ 1580 u32 inherit_flag; /* True if ACL is inherited from parent dir */ 1581 u32 num_cleaned; /* Number of ACEs removed due to subject removal */ 1582 unsigned int flags; 1583 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ 1584 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ 1585 }; 1586 1587 extern void yfs_free_opaque_acl(struct yfs_acl *); 1588 extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); 1589 extern void yfs_fs_store_opaque_acl2(struct afs_operation *); 1590 1591 /* 1592 * Miscellaneous inline functions. 1593 */ 1594 static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 1595 { 1596 return container_of(inode, struct afs_vnode, vfs_inode); 1597 } 1598 1599 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 1600 { 1601 return &vnode->vfs_inode; 1602 } 1603 1604 /* 1605 * Note that a dentry got changed. We need to set d_fsdata to the data version 1606 * number derived from the result of the operation. It doesn't matter if 1607 * d_fsdata goes backwards as we'll just revalidate. 1608 */ 1609 static inline void afs_update_dentry_version(struct afs_operation *op, 1610 struct afs_vnode_param *dir_vp, 1611 struct dentry *dentry) 1612 { 1613 if (!op->error) 1614 dentry->d_fsdata = 1615 (void *)(unsigned long)dir_vp->scb.status.data_version; 1616 } 1617 1618 /* 1619 * Set the file size and block count. Estimate the number of 512 bytes blocks 1620 * used, rounded up to nearest 1K for consistency with other AFS clients. 1621 */ 1622 static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size) 1623 { 1624 i_size_write(&vnode->vfs_inode, size); 1625 vnode->vfs_inode.i_blocks = ((size + 1023) >> 10) << 1; 1626 } 1627 1628 /* 1629 * Check for a conflicting operation on a directory that we just unlinked from. 1630 * If someone managed to sneak a link or an unlink in on the file we just 1631 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). 1632 */ 1633 static inline void afs_check_dir_conflict(struct afs_operation *op, 1634 struct afs_vnode_param *dvp) 1635 { 1636 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) 1637 op->flags |= AFS_OPERATION_DIR_CONFLICT; 1638 } 1639 1640 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) 1641 { 1642 trace_afs_io_error(call->debug_id, -EIO, where); 1643 return -EIO; 1644 } 1645 1646 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) 1647 { 1648 trace_afs_file_error(vnode, -EIO, where); 1649 return -EIO; 1650 } 1651 1652 /*****************************************************************************/ 1653 /* 1654 * debug tracing 1655 */ 1656 extern unsigned afs_debug; 1657 1658 #define dbgprintk(FMT,...) \ 1659 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1660 1661 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1662 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1663 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1664 1665 1666 #if defined(__KDEBUG) 1667 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1668 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1669 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1670 1671 #elif defined(CONFIG_AFS_DEBUG) 1672 #define AFS_DEBUG_KENTER 0x01 1673 #define AFS_DEBUG_KLEAVE 0x02 1674 #define AFS_DEBUG_KDEBUG 0x04 1675 1676 #define _enter(FMT,...) \ 1677 do { \ 1678 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 1679 kenter(FMT,##__VA_ARGS__); \ 1680 } while (0) 1681 1682 #define _leave(FMT,...) \ 1683 do { \ 1684 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 1685 kleave(FMT,##__VA_ARGS__); \ 1686 } while (0) 1687 1688 #define _debug(FMT,...) \ 1689 do { \ 1690 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 1691 kdebug(FMT,##__VA_ARGS__); \ 1692 } while (0) 1693 1694 #else 1695 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1696 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1697 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1698 #endif 1699 1700 /* 1701 * debug assertion checking 1702 */ 1703 #if 1 // defined(__KDEBUGALL) 1704 1705 #define ASSERT(X) \ 1706 do { \ 1707 if (unlikely(!(X))) { \ 1708 printk(KERN_ERR "\n"); \ 1709 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1710 BUG(); \ 1711 } \ 1712 } while(0) 1713 1714 #define ASSERTCMP(X, OP, Y) \ 1715 do { \ 1716 if (unlikely(!((X) OP (Y)))) { \ 1717 printk(KERN_ERR "\n"); \ 1718 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1719 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1720 (unsigned long)(X), (unsigned long)(Y)); \ 1721 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1722 (unsigned long)(X), (unsigned long)(Y)); \ 1723 BUG(); \ 1724 } \ 1725 } while(0) 1726 1727 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1728 do { \ 1729 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 1730 printk(KERN_ERR "\n"); \ 1731 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1732 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 1733 (unsigned long)(L), (unsigned long)(N), \ 1734 (unsigned long)(H)); \ 1735 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 1736 (unsigned long)(L), (unsigned long)(N), \ 1737 (unsigned long)(H)); \ 1738 BUG(); \ 1739 } \ 1740 } while(0) 1741 1742 #define ASSERTIF(C, X) \ 1743 do { \ 1744 if (unlikely((C) && !(X))) { \ 1745 printk(KERN_ERR "\n"); \ 1746 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1747 BUG(); \ 1748 } \ 1749 } while(0) 1750 1751 #define ASSERTIFCMP(C, X, OP, Y) \ 1752 do { \ 1753 if (unlikely((C) && !((X) OP (Y)))) { \ 1754 printk(KERN_ERR "\n"); \ 1755 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1756 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1757 (unsigned long)(X), (unsigned long)(Y)); \ 1758 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1759 (unsigned long)(X), (unsigned long)(Y)); \ 1760 BUG(); \ 1761 } \ 1762 } while(0) 1763 1764 #else 1765 1766 #define ASSERT(X) \ 1767 do { \ 1768 } while(0) 1769 1770 #define ASSERTCMP(X, OP, Y) \ 1771 do { \ 1772 } while(0) 1773 1774 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1775 do { \ 1776 } while(0) 1777 1778 #define ASSERTIF(C, X) \ 1779 do { \ 1780 } while(0) 1781 1782 #define ASSERTIFCMP(C, X, OP, Y) \ 1783 do { \ 1784 } while(0) 1785 1786 #endif /* __KDEBUGALL */ 1787