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 release_folio */ 315 atomic_t n_read_dir; /* Number of directory pages read */ 316 atomic_t n_dir_cr; /* Number of directory entry creation edits */ 317 atomic_t n_dir_rm; /* Number of directory entry removal edits */ 318 atomic_t n_stores; /* Number of store ops */ 319 atomic_long_t n_store_bytes; /* Number of bytes stored */ 320 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ 321 atomic_t n_fetches; /* Number of data fetch ops */ 322 }; 323 324 extern const char afs_init_sysname[]; 325 326 enum afs_cell_state { 327 AFS_CELL_UNSET, 328 AFS_CELL_ACTIVATING, 329 AFS_CELL_ACTIVE, 330 AFS_CELL_DEACTIVATING, 331 AFS_CELL_INACTIVE, 332 AFS_CELL_FAILED, 333 AFS_CELL_REMOVED, 334 }; 335 336 /* 337 * AFS cell record. 338 * 339 * This is a tricky concept to get right as it is possible to create aliases 340 * simply by pointing AFSDB/SRV records for two names at the same set of VL 341 * servers; it is also possible to do things like setting up two sets of VL 342 * servers, one of which provides a superset of the volumes provided by the 343 * other (for internal/external division, for example). 344 * 345 * Cells only exist in the sense that (a) a cell's name maps to a set of VL 346 * servers and (b) a cell's name is used by the client to select the key to use 347 * for authentication and encryption. The cell name is not typically used in 348 * the protocol. 349 * 350 * Two cells are determined to be aliases if they have an explicit alias (YFS 351 * only), share any VL servers in common or have at least one volume in common. 352 * "In common" means that the address list of the VL servers or the fileservers 353 * share at least one endpoint. 354 */ 355 struct afs_cell { 356 union { 357 struct rcu_head rcu; 358 struct rb_node net_node; /* Node in net->cells */ 359 }; 360 struct afs_net *net; 361 struct afs_cell *alias_of; /* The cell this is an alias of */ 362 struct afs_volume *root_volume; /* The root.cell volume if there is one */ 363 struct key *anonymous_key; /* anonymous user key for this cell */ 364 struct work_struct manager; /* Manager for init/deinit/dns */ 365 struct hlist_node proc_link; /* /proc cell list link */ 366 time64_t dns_expiry; /* Time AFSDB/SRV record expires */ 367 time64_t last_inactive; /* Time of last drop of usage count */ 368 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 netfs_inode netfs; /* Netfslib context and vfs inode */ 623 struct afs_volume *volume; /* volume on which vnode resides */ 624 struct afs_fid fid; /* the file identifier for this inode */ 625 struct afs_file_status status; /* AFS status info for this file */ 626 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ 627 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ 628 struct mutex io_lock; /* Lock for serialising I/O on this mutex */ 629 struct rw_semaphore validate_lock; /* lock for validating this vnode */ 630 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ 631 struct key *silly_key; /* Silly rename key */ 632 spinlock_t wb_lock; /* lock for wb_keys */ 633 spinlock_t lock; /* waitqueue/flags lock */ 634 unsigned long flags; 635 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ 636 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 637 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ 638 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 639 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 640 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 641 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ 642 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ 643 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ 644 #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */ 645 #define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */ 646 647 struct list_head wb_keys; /* List of keys available for writeback */ 648 struct list_head pending_locks; /* locks waiting to be granted */ 649 struct list_head granted_locks; /* locks granted on this file */ 650 struct delayed_work lock_work; /* work to be done in locking */ 651 struct key *lock_key; /* Key to be used in lock ops */ 652 ktime_t locked_at; /* Time at which lock obtained */ 653 enum afs_lock_state lock_state : 8; 654 afs_lock_type_t lock_type : 8; 655 656 /* outstanding callback notification on this file */ 657 struct work_struct cb_work; /* Work for mmap'd files */ 658 struct list_head cb_mmap_link; /* Link in cell->fs_open_mmaps */ 659 void *cb_server; /* Server with callback/filelock */ 660 atomic_t cb_nr_mmap; /* Number of mmaps */ 661 unsigned int cb_fs_s_break; /* Mass server break counter (cell->fs_s_break) */ 662 unsigned int cb_s_break; /* Mass break counter on ->server */ 663 unsigned int cb_v_break; /* Mass break counter on ->volume */ 664 unsigned int cb_break; /* Break counter on vnode */ 665 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ 666 667 time64_t cb_expires_at; /* time at which callback expires */ 668 }; 669 670 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) 671 { 672 #ifdef CONFIG_AFS_FSCACHE 673 return netfs_i_cookie(&vnode->netfs); 674 #else 675 return NULL; 676 #endif 677 } 678 679 static inline void afs_vnode_set_cache(struct afs_vnode *vnode, 680 struct fscache_cookie *cookie) 681 { 682 #ifdef CONFIG_AFS_FSCACHE 683 vnode->netfs.cache = cookie; 684 #endif 685 } 686 687 /* 688 * cached security record for one user's attempt to access a vnode 689 */ 690 struct afs_permit { 691 struct key *key; /* RxRPC ticket holding a security context */ 692 afs_access_t access; /* CallerAccess value for this key */ 693 }; 694 695 /* 696 * Immutable cache of CallerAccess records from attempts to access vnodes. 697 * These may be shared between multiple vnodes. 698 */ 699 struct afs_permits { 700 struct rcu_head rcu; 701 struct hlist_node hash_node; /* Link in hash */ 702 unsigned long h; /* Hash value for this permit list */ 703 refcount_t usage; 704 unsigned short nr_permits; /* Number of records */ 705 bool invalidated; /* Invalidated due to key change */ 706 struct afs_permit permits[]; /* List of permits sorted by key pointer */ 707 }; 708 709 /* 710 * Error prioritisation and accumulation. 711 */ 712 struct afs_error { 713 short error; /* Accumulated error */ 714 bool responded; /* T if server responded */ 715 }; 716 717 /* 718 * Cursor for iterating over a server's address list. 719 */ 720 struct afs_addr_cursor { 721 struct afs_addr_list *alist; /* Current address list (pins ref) */ 722 unsigned long tried; /* Tried addresses */ 723 signed char index; /* Current address */ 724 bool responded; /* T if the current address responded */ 725 unsigned short nr_iterations; /* Number of address iterations */ 726 short error; 727 u32 abort_code; 728 }; 729 730 /* 731 * Cursor for iterating over a set of volume location servers. 732 */ 733 struct afs_vl_cursor { 734 struct afs_addr_cursor ac; 735 struct afs_cell *cell; /* The cell we're querying */ 736 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ 737 struct afs_vlserver *server; /* Server on which this resides */ 738 struct key *key; /* Key for the server */ 739 unsigned long untried; /* Bitmask of untried servers */ 740 short index; /* Current server */ 741 short error; 742 unsigned short flags; 743 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ 744 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ 745 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ 746 unsigned short nr_iterations; /* Number of server iterations */ 747 }; 748 749 /* 750 * Fileserver operation methods. 751 */ 752 struct afs_operation_ops { 753 void (*issue_afs_rpc)(struct afs_operation *op); 754 void (*issue_yfs_rpc)(struct afs_operation *op); 755 void (*success)(struct afs_operation *op); 756 void (*aborted)(struct afs_operation *op); 757 void (*failed)(struct afs_operation *op); 758 void (*edit_dir)(struct afs_operation *op); 759 void (*put)(struct afs_operation *op); 760 }; 761 762 struct afs_vnode_param { 763 struct afs_vnode *vnode; 764 struct afs_fid fid; /* Fid to access */ 765 struct afs_status_cb scb; /* Returned status and callback promise */ 766 afs_dataversion_t dv_before; /* Data version before the call */ 767 unsigned int cb_break_before; /* cb_break + cb_s_break before the call */ 768 u8 dv_delta; /* Expected change in data version */ 769 bool put_vnode:1; /* T if we have a ref on the vnode */ 770 bool need_io_lock:1; /* T if we need the I/O lock on this */ 771 bool update_ctime:1; /* Need to update the ctime */ 772 bool set_size:1; /* Must update i_size */ 773 bool op_unlinked:1; /* True if file was unlinked by op */ 774 bool speculative:1; /* T if speculative status fetch (no vnode lock) */ 775 bool modification:1; /* Set if the content gets modified */ 776 }; 777 778 /* 779 * Fileserver operation wrapper, handling server and address rotation 780 * asynchronously. May make simultaneous calls to multiple servers. 781 */ 782 struct afs_operation { 783 struct afs_net *net; /* Network namespace */ 784 struct key *key; /* Key for the cell */ 785 const struct afs_call_type *type; /* Type of call done */ 786 const struct afs_operation_ops *ops; 787 788 /* Parameters/results for the operation */ 789 struct afs_volume *volume; /* Volume being accessed */ 790 struct afs_vnode_param file[2]; 791 struct afs_vnode_param *more_files; 792 struct afs_volsync volsync; 793 struct dentry *dentry; /* Dentry to be altered */ 794 struct dentry *dentry_2; /* Second dentry to be altered */ 795 struct timespec64 mtime; /* Modification time to record */ 796 struct timespec64 ctime; /* Change time to set */ 797 short nr_files; /* Number of entries in file[], more_files */ 798 short error; 799 unsigned int debug_id; 800 801 unsigned int cb_v_break; /* Volume break counter before op */ 802 unsigned int cb_s_break; /* Server break counter before op */ 803 804 union { 805 struct { 806 int which; /* Which ->file[] to fetch for */ 807 } fetch_status; 808 struct { 809 int reason; /* enum afs_edit_dir_reason */ 810 mode_t mode; 811 const char *symlink; 812 } create; 813 struct { 814 bool need_rehash; 815 } unlink; 816 struct { 817 struct dentry *rehash; 818 struct dentry *tmp; 819 bool new_negative; 820 } rename; 821 struct { 822 struct afs_read *req; 823 } fetch; 824 struct { 825 afs_lock_type_t type; 826 } lock; 827 struct { 828 struct iov_iter *write_iter; 829 loff_t pos; 830 loff_t size; 831 loff_t i_size; 832 bool laundering; /* Laundering page, PG_writeback not set */ 833 } store; 834 struct { 835 struct iattr *attr; 836 loff_t old_i_size; 837 } setattr; 838 struct afs_acl *acl; 839 struct yfs_acl *yacl; 840 struct { 841 struct afs_volume_status vs; 842 struct kstatfs *buf; 843 } volstatus; 844 }; 845 846 /* Fileserver iteration state */ 847 struct afs_addr_cursor ac; 848 struct afs_server_list *server_list; /* Current server list (pins ref) */ 849 struct afs_server *server; /* Server we're using (ref pinned by server_list) */ 850 struct afs_call *call; 851 unsigned long untried; /* Bitmask of untried servers */ 852 short index; /* Current server */ 853 unsigned short nr_iterations; /* Number of server iterations */ 854 855 unsigned int flags; 856 #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ 857 #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ 858 #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ 859 #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ 860 #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ 861 #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ 862 #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ 863 #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ 864 #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ 865 #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ 866 #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ 867 #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ 868 #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ 869 }; 870 871 /* 872 * Cache auxiliary data. 873 */ 874 struct afs_vnode_cache_aux { 875 __be64 data_version; 876 } __packed; 877 878 static inline void afs_set_cache_aux(struct afs_vnode *vnode, 879 struct afs_vnode_cache_aux *aux) 880 { 881 aux->data_version = cpu_to_be64(vnode->status.data_version); 882 } 883 884 static inline void afs_invalidate_cache(struct afs_vnode *vnode, unsigned int flags) 885 { 886 struct afs_vnode_cache_aux aux; 887 888 afs_set_cache_aux(vnode, &aux); 889 fscache_invalidate(afs_vnode_cache(vnode), &aux, 890 i_size_read(&vnode->netfs.inode), flags); 891 } 892 893 /* 894 * We use folio->private to hold the amount of the folio that we've written to, 895 * splitting the field into two parts. However, we need to represent a range 896 * 0...FOLIO_SIZE, so we reduce the resolution if the size of the folio 897 * exceeds what we can encode. 898 */ 899 #ifdef CONFIG_64BIT 900 #define __AFS_FOLIO_PRIV_MASK 0x7fffffffUL 901 #define __AFS_FOLIO_PRIV_SHIFT 32 902 #define __AFS_FOLIO_PRIV_MMAPPED 0x80000000UL 903 #else 904 #define __AFS_FOLIO_PRIV_MASK 0x7fffUL 905 #define __AFS_FOLIO_PRIV_SHIFT 16 906 #define __AFS_FOLIO_PRIV_MMAPPED 0x8000UL 907 #endif 908 909 static inline unsigned int afs_folio_dirty_resolution(struct folio *folio) 910 { 911 int shift = folio_shift(folio) - (__AFS_FOLIO_PRIV_SHIFT - 1); 912 return (shift > 0) ? shift : 0; 913 } 914 915 static inline size_t afs_folio_dirty_from(struct folio *folio, unsigned long priv) 916 { 917 unsigned long x = priv & __AFS_FOLIO_PRIV_MASK; 918 919 /* The lower bound is inclusive */ 920 return x << afs_folio_dirty_resolution(folio); 921 } 922 923 static inline size_t afs_folio_dirty_to(struct folio *folio, unsigned long priv) 924 { 925 unsigned long x = (priv >> __AFS_FOLIO_PRIV_SHIFT) & __AFS_FOLIO_PRIV_MASK; 926 927 /* The upper bound is immediately beyond the region */ 928 return (x + 1) << afs_folio_dirty_resolution(folio); 929 } 930 931 static inline unsigned long afs_folio_dirty(struct folio *folio, size_t from, size_t to) 932 { 933 unsigned int res = afs_folio_dirty_resolution(folio); 934 from >>= res; 935 to = (to - 1) >> res; 936 return (to << __AFS_FOLIO_PRIV_SHIFT) | from; 937 } 938 939 static inline unsigned long afs_folio_dirty_mmapped(unsigned long priv) 940 { 941 return priv | __AFS_FOLIO_PRIV_MMAPPED; 942 } 943 944 static inline bool afs_is_folio_dirty_mmapped(unsigned long priv) 945 { 946 return priv & __AFS_FOLIO_PRIV_MMAPPED; 947 } 948 949 #include <trace/events/afs.h> 950 951 /*****************************************************************************/ 952 /* 953 * addr_list.c 954 */ 955 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) 956 { 957 if (alist) 958 refcount_inc(&alist->usage); 959 return alist; 960 } 961 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, 962 unsigned short, 963 unsigned short); 964 extern void afs_put_addrlist(struct afs_addr_list *); 965 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, 966 const char *, size_t, char, 967 unsigned short, unsigned short); 968 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); 969 extern bool afs_iterate_addresses(struct afs_addr_cursor *); 970 extern int afs_end_cursor(struct afs_addr_cursor *); 971 972 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); 973 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); 974 975 /* 976 * cache.c 977 */ 978 #ifdef CONFIG_AFS_FSCACHE 979 extern struct fscache_netfs afs_cache_netfs; 980 #endif 981 982 /* 983 * callback.c 984 */ 985 extern void afs_invalidate_mmap_work(struct work_struct *); 986 extern void afs_server_init_callback_work(struct work_struct *work); 987 extern void afs_init_callback_state(struct afs_server *); 988 extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 989 extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 990 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); 991 992 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) 993 { 994 return vnode->cb_break + vnode->cb_v_break; 995 } 996 997 static inline bool afs_cb_is_broken(unsigned int cb_break, 998 const struct afs_vnode *vnode) 999 { 1000 return cb_break != (vnode->cb_break + vnode->volume->cb_v_break); 1001 } 1002 1003 /* 1004 * cell.c 1005 */ 1006 extern int afs_cell_init(struct afs_net *, const char *); 1007 extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, 1008 enum afs_cell_trace); 1009 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, 1010 const char *, bool); 1011 extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); 1012 extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace); 1013 extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); 1014 extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); 1015 extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); 1016 extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); 1017 extern void afs_manage_cells(struct work_struct *); 1018 extern void afs_cells_timer(struct timer_list *); 1019 extern void __net_exit afs_cell_purge(struct afs_net *); 1020 1021 /* 1022 * cmservice.c 1023 */ 1024 extern bool afs_cm_incoming_call(struct afs_call *); 1025 1026 /* 1027 * dir.c 1028 */ 1029 extern const struct file_operations afs_dir_file_operations; 1030 extern const struct inode_operations afs_dir_inode_operations; 1031 extern const struct address_space_operations afs_dir_aops; 1032 extern const struct dentry_operations afs_fs_dentry_operations; 1033 1034 extern void afs_d_release(struct dentry *); 1035 extern void afs_check_for_remote_deletion(struct afs_operation *); 1036 1037 /* 1038 * dir_edit.c 1039 */ 1040 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, 1041 enum afs_edit_dir_reason); 1042 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); 1043 1044 /* 1045 * dir_silly.c 1046 */ 1047 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, 1048 struct dentry *, struct key *); 1049 extern int afs_silly_iput(struct dentry *, struct inode *); 1050 1051 /* 1052 * dynroot.c 1053 */ 1054 extern const struct inode_operations afs_dynroot_inode_operations; 1055 extern const struct dentry_operations afs_dynroot_dentry_operations; 1056 1057 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); 1058 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); 1059 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); 1060 extern int afs_dynroot_populate(struct super_block *); 1061 extern void afs_dynroot_depopulate(struct super_block *); 1062 1063 /* 1064 * file.c 1065 */ 1066 extern const struct address_space_operations afs_file_aops; 1067 extern const struct address_space_operations afs_symlink_aops; 1068 extern const struct inode_operations afs_file_inode_operations; 1069 extern const struct file_operations afs_file_operations; 1070 extern const struct netfs_request_ops afs_req_ops; 1071 1072 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); 1073 extern void afs_put_wb_key(struct afs_wb_key *); 1074 extern int afs_open(struct inode *, struct file *); 1075 extern int afs_release(struct inode *, struct file *); 1076 extern int afs_fetch_data(struct afs_vnode *, struct afs_read *); 1077 extern struct afs_read *afs_alloc_read(gfp_t); 1078 extern void afs_put_read(struct afs_read *); 1079 extern int afs_write_inode(struct inode *, struct writeback_control *); 1080 1081 static inline struct afs_read *afs_get_read(struct afs_read *req) 1082 { 1083 refcount_inc(&req->usage); 1084 return req; 1085 } 1086 1087 /* 1088 * flock.c 1089 */ 1090 extern struct workqueue_struct *afs_lock_manager; 1091 1092 extern void afs_lock_op_done(struct afs_call *); 1093 extern void afs_lock_work(struct work_struct *); 1094 extern void afs_lock_may_be_available(struct afs_vnode *); 1095 extern int afs_lock(struct file *, int, struct file_lock *); 1096 extern int afs_flock(struct file *, int, struct file_lock *); 1097 1098 /* 1099 * fsclient.c 1100 */ 1101 extern void afs_fs_fetch_status(struct afs_operation *); 1102 extern void afs_fs_fetch_data(struct afs_operation *); 1103 extern void afs_fs_create_file(struct afs_operation *); 1104 extern void afs_fs_make_dir(struct afs_operation *); 1105 extern void afs_fs_remove_file(struct afs_operation *); 1106 extern void afs_fs_remove_dir(struct afs_operation *); 1107 extern void afs_fs_link(struct afs_operation *); 1108 extern void afs_fs_symlink(struct afs_operation *); 1109 extern void afs_fs_rename(struct afs_operation *); 1110 extern void afs_fs_store_data(struct afs_operation *); 1111 extern void afs_fs_setattr(struct afs_operation *); 1112 extern void afs_fs_get_volume_status(struct afs_operation *); 1113 extern void afs_fs_set_lock(struct afs_operation *); 1114 extern void afs_fs_extend_lock(struct afs_operation *); 1115 extern void afs_fs_release_lock(struct afs_operation *); 1116 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, 1117 struct afs_addr_cursor *, struct key *); 1118 extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *, 1119 struct afs_addr_cursor *, struct key *); 1120 extern void afs_fs_inline_bulk_status(struct afs_operation *); 1121 1122 struct afs_acl { 1123 u32 size; 1124 u8 data[]; 1125 }; 1126 1127 extern void afs_fs_fetch_acl(struct afs_operation *); 1128 extern void afs_fs_store_acl(struct afs_operation *); 1129 1130 /* 1131 * fs_operation.c 1132 */ 1133 extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); 1134 extern int afs_put_operation(struct afs_operation *); 1135 extern bool afs_begin_vnode_operation(struct afs_operation *); 1136 extern void afs_wait_for_operation(struct afs_operation *); 1137 extern int afs_do_sync_operation(struct afs_operation *); 1138 1139 static inline void afs_op_nomem(struct afs_operation *op) 1140 { 1141 op->error = -ENOMEM; 1142 } 1143 1144 static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, 1145 struct afs_vnode *vnode) 1146 { 1147 op->file[n].vnode = vnode; 1148 op->file[n].need_io_lock = true; 1149 } 1150 1151 static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, 1152 const struct afs_fid *fid) 1153 { 1154 op->file[n].fid = *fid; 1155 } 1156 1157 /* 1158 * fs_probe.c 1159 */ 1160 extern void afs_fileserver_probe_result(struct afs_call *); 1161 extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool); 1162 extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long); 1163 extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); 1164 extern void afs_fs_probe_dispatcher(struct work_struct *); 1165 extern int afs_wait_for_one_fs_probe(struct afs_server *, bool); 1166 extern void afs_fs_probe_cleanup(struct afs_net *); 1167 1168 /* 1169 * inode.c 1170 */ 1171 extern const struct afs_operation_ops afs_fetch_status_operation; 1172 1173 extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); 1174 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); 1175 extern int afs_ilookup5_test_by_fid(struct inode *, void *); 1176 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); 1177 extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); 1178 extern struct inode *afs_root_iget(struct super_block *, struct key *); 1179 extern bool afs_check_validity(struct afs_vnode *); 1180 extern int afs_validate(struct afs_vnode *, struct key *); 1181 extern int afs_getattr(struct user_namespace *mnt_userns, const struct path *, 1182 struct kstat *, u32, unsigned int); 1183 extern int afs_setattr(struct user_namespace *mnt_userns, struct dentry *, struct iattr *); 1184 extern void afs_evict_inode(struct inode *); 1185 extern int afs_drop_inode(struct inode *); 1186 1187 /* 1188 * main.c 1189 */ 1190 extern struct workqueue_struct *afs_wq; 1191 extern int afs_net_id; 1192 1193 static inline struct afs_net *afs_net(struct net *net) 1194 { 1195 return net_generic(net, afs_net_id); 1196 } 1197 1198 static inline struct afs_net *afs_sb2net(struct super_block *sb) 1199 { 1200 return afs_net(AFS_FS_S(sb)->net_ns); 1201 } 1202 1203 static inline struct afs_net *afs_d2net(struct dentry *dentry) 1204 { 1205 return afs_sb2net(dentry->d_sb); 1206 } 1207 1208 static inline struct afs_net *afs_i2net(struct inode *inode) 1209 { 1210 return afs_sb2net(inode->i_sb); 1211 } 1212 1213 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 1214 { 1215 return afs_i2net(&vnode->netfs.inode); 1216 } 1217 1218 static inline struct afs_net *afs_sock2net(struct sock *sk) 1219 { 1220 return net_generic(sock_net(sk), afs_net_id); 1221 } 1222 1223 static inline void __afs_stat(atomic_t *s) 1224 { 1225 atomic_inc(s); 1226 } 1227 1228 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) 1229 1230 /* 1231 * misc.c 1232 */ 1233 extern int afs_abort_to_error(u32); 1234 extern void afs_prioritise_error(struct afs_error *, int, u32); 1235 1236 /* 1237 * mntpt.c 1238 */ 1239 extern const struct inode_operations afs_mntpt_inode_operations; 1240 extern const struct inode_operations afs_autocell_inode_operations; 1241 extern const struct file_operations afs_mntpt_file_operations; 1242 1243 extern struct vfsmount *afs_d_automount(struct path *); 1244 extern void afs_mntpt_kill_timer(void); 1245 1246 /* 1247 * proc.c 1248 */ 1249 #ifdef CONFIG_PROC_FS 1250 extern int __net_init afs_proc_init(struct afs_net *); 1251 extern void __net_exit afs_proc_cleanup(struct afs_net *); 1252 extern int afs_proc_cell_setup(struct afs_cell *); 1253 extern void afs_proc_cell_remove(struct afs_cell *); 1254 extern void afs_put_sysnames(struct afs_sysnames *); 1255 #else 1256 static inline int afs_proc_init(struct afs_net *net) { return 0; } 1257 static inline void afs_proc_cleanup(struct afs_net *net) {} 1258 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } 1259 static inline void afs_proc_cell_remove(struct afs_cell *cell) {} 1260 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} 1261 #endif 1262 1263 /* 1264 * rotate.c 1265 */ 1266 extern bool afs_select_fileserver(struct afs_operation *); 1267 extern void afs_dump_edestaddrreq(const struct afs_operation *); 1268 1269 /* 1270 * rxrpc.c 1271 */ 1272 extern struct workqueue_struct *afs_async_calls; 1273 1274 extern int __net_init afs_open_socket(struct afs_net *); 1275 extern void __net_exit afs_close_socket(struct afs_net *); 1276 extern void afs_charge_preallocation(struct work_struct *); 1277 extern void afs_put_call(struct afs_call *); 1278 extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t); 1279 extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *); 1280 extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 1281 const struct afs_call_type *, 1282 size_t, size_t); 1283 extern void afs_flat_call_destructor(struct afs_call *); 1284 extern void afs_send_empty_reply(struct afs_call *); 1285 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 1286 extern int afs_extract_data(struct afs_call *, bool); 1287 extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); 1288 1289 static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, 1290 gfp_t gfp) 1291 { 1292 op->call = call; 1293 op->type = call->type; 1294 call->op = op; 1295 call->key = op->key; 1296 call->intr = !(op->flags & AFS_OPERATION_UNINTR); 1297 afs_make_call(&op->ac, call, gfp); 1298 } 1299 1300 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) 1301 { 1302 call->iov_len = size; 1303 call->kvec[0].iov_base = buf; 1304 call->kvec[0].iov_len = size; 1305 iov_iter_kvec(&call->def_iter, READ, call->kvec, 1, size); 1306 } 1307 1308 static inline void afs_extract_to_tmp(struct afs_call *call) 1309 { 1310 call->iov_len = sizeof(call->tmp); 1311 afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); 1312 } 1313 1314 static inline void afs_extract_to_tmp64(struct afs_call *call) 1315 { 1316 call->iov_len = sizeof(call->tmp64); 1317 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); 1318 } 1319 1320 static inline void afs_extract_discard(struct afs_call *call, size_t size) 1321 { 1322 call->iov_len = size; 1323 iov_iter_discard(&call->def_iter, READ, size); 1324 } 1325 1326 static inline void afs_extract_to_buf(struct afs_call *call, size_t size) 1327 { 1328 call->iov_len = size; 1329 afs_extract_begin(call, call->buffer, size); 1330 } 1331 1332 static inline int afs_transfer_reply(struct afs_call *call) 1333 { 1334 return afs_extract_data(call, false); 1335 } 1336 1337 static inline bool afs_check_call_state(struct afs_call *call, 1338 enum afs_call_state state) 1339 { 1340 return READ_ONCE(call->state) == state; 1341 } 1342 1343 static inline bool afs_set_call_state(struct afs_call *call, 1344 enum afs_call_state from, 1345 enum afs_call_state to) 1346 { 1347 bool ok = false; 1348 1349 spin_lock_bh(&call->state_lock); 1350 if (call->state == from) { 1351 call->state = to; 1352 trace_afs_call_state(call, from, to, 0, 0); 1353 ok = true; 1354 } 1355 spin_unlock_bh(&call->state_lock); 1356 return ok; 1357 } 1358 1359 static inline void afs_set_call_complete(struct afs_call *call, 1360 int error, u32 remote_abort) 1361 { 1362 enum afs_call_state state; 1363 bool ok = false; 1364 1365 spin_lock_bh(&call->state_lock); 1366 state = call->state; 1367 if (state != AFS_CALL_COMPLETE) { 1368 call->abort_code = remote_abort; 1369 call->error = error; 1370 call->state = AFS_CALL_COMPLETE; 1371 trace_afs_call_state(call, state, AFS_CALL_COMPLETE, 1372 error, remote_abort); 1373 ok = true; 1374 } 1375 spin_unlock_bh(&call->state_lock); 1376 if (ok) { 1377 trace_afs_call_done(call); 1378 1379 /* Asynchronous calls have two refs to release - one from the alloc and 1380 * one queued with the work item - and we can't just deallocate the 1381 * call because the work item may be queued again. 1382 */ 1383 if (call->drop_ref) 1384 afs_put_call(call); 1385 } 1386 } 1387 1388 /* 1389 * security.c 1390 */ 1391 extern void afs_put_permits(struct afs_permits *); 1392 extern void afs_clear_permits(struct afs_vnode *); 1393 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, 1394 struct afs_status_cb *); 1395 extern void afs_zap_permits(struct rcu_head *); 1396 extern struct key *afs_request_key(struct afs_cell *); 1397 extern struct key *afs_request_key_rcu(struct afs_cell *); 1398 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); 1399 extern int afs_permission(struct user_namespace *, struct inode *, int); 1400 extern void __exit afs_clean_up_permit_cache(void); 1401 1402 /* 1403 * server.c 1404 */ 1405 extern spinlock_t afs_server_peer_lock; 1406 1407 extern struct afs_server *afs_find_server(struct afs_net *, 1408 const struct sockaddr_rxrpc *); 1409 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); 1410 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); 1411 extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); 1412 extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace); 1413 extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1414 extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace); 1415 extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1416 extern void afs_manage_servers(struct work_struct *); 1417 extern void afs_servers_timer(struct timer_list *); 1418 extern void afs_fs_probe_timer(struct timer_list *); 1419 extern void __net_exit afs_purge_servers(struct afs_net *); 1420 extern bool afs_check_server_record(struct afs_operation *, struct afs_server *); 1421 1422 static inline void afs_inc_servers_outstanding(struct afs_net *net) 1423 { 1424 atomic_inc(&net->servers_outstanding); 1425 } 1426 1427 static inline void afs_dec_servers_outstanding(struct afs_net *net) 1428 { 1429 if (atomic_dec_and_test(&net->servers_outstanding)) 1430 wake_up_var(&net->servers_outstanding); 1431 } 1432 1433 static inline bool afs_is_probing_server(struct afs_server *server) 1434 { 1435 return list_empty(&server->probe_link); 1436 } 1437 1438 /* 1439 * server_list.c 1440 */ 1441 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) 1442 { 1443 refcount_inc(&slist->usage); 1444 return slist; 1445 } 1446 1447 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); 1448 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, 1449 struct afs_vldb_entry *, 1450 u8); 1451 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); 1452 1453 /* 1454 * super.c 1455 */ 1456 extern int __init afs_fs_init(void); 1457 extern void afs_fs_exit(void); 1458 1459 /* 1460 * vlclient.c 1461 */ 1462 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, 1463 const char *, int); 1464 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); 1465 extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, 1466 struct key *, struct afs_vlserver *, unsigned int); 1467 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); 1468 extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); 1469 1470 /* 1471 * vl_alias.c 1472 */ 1473 extern int afs_cell_detect_alias(struct afs_cell *, struct key *); 1474 1475 /* 1476 * vl_probe.c 1477 */ 1478 extern void afs_vlserver_probe_result(struct afs_call *); 1479 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); 1480 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); 1481 1482 /* 1483 * vl_rotate.c 1484 */ 1485 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, 1486 struct afs_cell *, struct key *); 1487 extern bool afs_select_vlserver(struct afs_vl_cursor *); 1488 extern bool afs_select_current_vlserver(struct afs_vl_cursor *); 1489 extern int afs_end_vlserver_operation(struct afs_vl_cursor *); 1490 1491 /* 1492 * vlserver_list.c 1493 */ 1494 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) 1495 { 1496 atomic_inc(&vlserver->usage); 1497 return vlserver; 1498 } 1499 1500 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) 1501 { 1502 if (vllist) 1503 atomic_inc(&vllist->usage); 1504 return vllist; 1505 } 1506 1507 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); 1508 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); 1509 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); 1510 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); 1511 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, 1512 const void *, size_t); 1513 1514 /* 1515 * volume.c 1516 */ 1517 extern struct afs_volume *afs_create_volume(struct afs_fs_context *); 1518 extern int afs_activate_volume(struct afs_volume *); 1519 extern void afs_deactivate_volume(struct afs_volume *); 1520 extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); 1521 extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace); 1522 extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); 1523 1524 /* 1525 * write.c 1526 */ 1527 #ifdef CONFIG_AFS_FSCACHE 1528 bool afs_dirty_folio(struct address_space *, struct folio *); 1529 #else 1530 #define afs_dirty_folio filemap_dirty_folio 1531 #endif 1532 extern int afs_write_begin(struct file *file, struct address_space *mapping, 1533 loff_t pos, unsigned len, 1534 struct page **pagep, void **fsdata); 1535 extern int afs_write_end(struct file *file, struct address_space *mapping, 1536 loff_t pos, unsigned len, unsigned copied, 1537 struct page *page, void *fsdata); 1538 extern int afs_writepage(struct page *, struct writeback_control *); 1539 extern int afs_writepages(struct address_space *, struct writeback_control *); 1540 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); 1541 extern int afs_fsync(struct file *, loff_t, loff_t, int); 1542 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); 1543 extern void afs_prune_wb_keys(struct afs_vnode *); 1544 int afs_launder_folio(struct folio *); 1545 1546 /* 1547 * xattr.c 1548 */ 1549 extern const struct xattr_handler *afs_xattr_handlers[]; 1550 1551 /* 1552 * yfsclient.c 1553 */ 1554 extern void yfs_fs_fetch_data(struct afs_operation *); 1555 extern void yfs_fs_create_file(struct afs_operation *); 1556 extern void yfs_fs_make_dir(struct afs_operation *); 1557 extern void yfs_fs_remove_file2(struct afs_operation *); 1558 extern void yfs_fs_remove_file(struct afs_operation *); 1559 extern void yfs_fs_remove_dir(struct afs_operation *); 1560 extern void yfs_fs_link(struct afs_operation *); 1561 extern void yfs_fs_symlink(struct afs_operation *); 1562 extern void yfs_fs_rename(struct afs_operation *); 1563 extern void yfs_fs_store_data(struct afs_operation *); 1564 extern void yfs_fs_setattr(struct afs_operation *); 1565 extern void yfs_fs_get_volume_status(struct afs_operation *); 1566 extern void yfs_fs_set_lock(struct afs_operation *); 1567 extern void yfs_fs_extend_lock(struct afs_operation *); 1568 extern void yfs_fs_release_lock(struct afs_operation *); 1569 extern void yfs_fs_fetch_status(struct afs_operation *); 1570 extern void yfs_fs_inline_bulk_status(struct afs_operation *); 1571 1572 struct yfs_acl { 1573 struct afs_acl *acl; /* Dir/file/symlink ACL */ 1574 struct afs_acl *vol_acl; /* Whole volume ACL */ 1575 u32 inherit_flag; /* True if ACL is inherited from parent dir */ 1576 u32 num_cleaned; /* Number of ACEs removed due to subject removal */ 1577 unsigned int flags; 1578 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ 1579 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ 1580 }; 1581 1582 extern void yfs_free_opaque_acl(struct yfs_acl *); 1583 extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); 1584 extern void yfs_fs_store_opaque_acl2(struct afs_operation *); 1585 1586 /* 1587 * Miscellaneous inline functions. 1588 */ 1589 static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 1590 { 1591 return container_of(inode, struct afs_vnode, netfs.inode); 1592 } 1593 1594 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 1595 { 1596 return &vnode->netfs.inode; 1597 } 1598 1599 /* 1600 * Note that a dentry got changed. We need to set d_fsdata to the data version 1601 * number derived from the result of the operation. It doesn't matter if 1602 * d_fsdata goes backwards as we'll just revalidate. 1603 */ 1604 static inline void afs_update_dentry_version(struct afs_operation *op, 1605 struct afs_vnode_param *dir_vp, 1606 struct dentry *dentry) 1607 { 1608 if (!op->error) 1609 dentry->d_fsdata = 1610 (void *)(unsigned long)dir_vp->scb.status.data_version; 1611 } 1612 1613 /* 1614 * Set the file size and block count. Estimate the number of 512 bytes blocks 1615 * used, rounded up to nearest 1K for consistency with other AFS clients. 1616 */ 1617 static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size) 1618 { 1619 i_size_write(&vnode->netfs.inode, size); 1620 vnode->netfs.inode.i_blocks = ((size + 1023) >> 10) << 1; 1621 } 1622 1623 /* 1624 * Check for a conflicting operation on a directory that we just unlinked from. 1625 * If someone managed to sneak a link or an unlink in on the file we just 1626 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). 1627 */ 1628 static inline void afs_check_dir_conflict(struct afs_operation *op, 1629 struct afs_vnode_param *dvp) 1630 { 1631 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) 1632 op->flags |= AFS_OPERATION_DIR_CONFLICT; 1633 } 1634 1635 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) 1636 { 1637 trace_afs_io_error(call->debug_id, -EIO, where); 1638 return -EIO; 1639 } 1640 1641 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) 1642 { 1643 trace_afs_file_error(vnode, -EIO, where); 1644 return -EIO; 1645 } 1646 1647 /*****************************************************************************/ 1648 /* 1649 * debug tracing 1650 */ 1651 extern unsigned afs_debug; 1652 1653 #define dbgprintk(FMT,...) \ 1654 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1655 1656 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1657 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1658 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1659 1660 1661 #if defined(__KDEBUG) 1662 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1663 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1664 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1665 1666 #elif defined(CONFIG_AFS_DEBUG) 1667 #define AFS_DEBUG_KENTER 0x01 1668 #define AFS_DEBUG_KLEAVE 0x02 1669 #define AFS_DEBUG_KDEBUG 0x04 1670 1671 #define _enter(FMT,...) \ 1672 do { \ 1673 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 1674 kenter(FMT,##__VA_ARGS__); \ 1675 } while (0) 1676 1677 #define _leave(FMT,...) \ 1678 do { \ 1679 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 1680 kleave(FMT,##__VA_ARGS__); \ 1681 } while (0) 1682 1683 #define _debug(FMT,...) \ 1684 do { \ 1685 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 1686 kdebug(FMT,##__VA_ARGS__); \ 1687 } while (0) 1688 1689 #else 1690 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1691 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1692 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1693 #endif 1694 1695 /* 1696 * debug assertion checking 1697 */ 1698 #if 1 // defined(__KDEBUGALL) 1699 1700 #define ASSERT(X) \ 1701 do { \ 1702 if (unlikely(!(X))) { \ 1703 printk(KERN_ERR "\n"); \ 1704 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1705 BUG(); \ 1706 } \ 1707 } while(0) 1708 1709 #define ASSERTCMP(X, OP, Y) \ 1710 do { \ 1711 if (unlikely(!((X) OP (Y)))) { \ 1712 printk(KERN_ERR "\n"); \ 1713 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1714 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1715 (unsigned long)(X), (unsigned long)(Y)); \ 1716 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1717 (unsigned long)(X), (unsigned long)(Y)); \ 1718 BUG(); \ 1719 } \ 1720 } while(0) 1721 1722 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1723 do { \ 1724 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 1725 printk(KERN_ERR "\n"); \ 1726 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1727 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 1728 (unsigned long)(L), (unsigned long)(N), \ 1729 (unsigned long)(H)); \ 1730 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 1731 (unsigned long)(L), (unsigned long)(N), \ 1732 (unsigned long)(H)); \ 1733 BUG(); \ 1734 } \ 1735 } while(0) 1736 1737 #define ASSERTIF(C, X) \ 1738 do { \ 1739 if (unlikely((C) && !(X))) { \ 1740 printk(KERN_ERR "\n"); \ 1741 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1742 BUG(); \ 1743 } \ 1744 } while(0) 1745 1746 #define ASSERTIFCMP(C, X, OP, Y) \ 1747 do { \ 1748 if (unlikely((C) && !((X) OP (Y)))) { \ 1749 printk(KERN_ERR "\n"); \ 1750 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1751 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1752 (unsigned long)(X), (unsigned long)(Y)); \ 1753 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1754 (unsigned long)(X), (unsigned long)(Y)); \ 1755 BUG(); \ 1756 } \ 1757 } while(0) 1758 1759 #else 1760 1761 #define ASSERT(X) \ 1762 do { \ 1763 } while(0) 1764 1765 #define ASSERTCMP(X, OP, Y) \ 1766 do { \ 1767 } while(0) 1768 1769 #define ASSERTRANGE(L, OP1, N, OP2, H) \ 1770 do { \ 1771 } while(0) 1772 1773 #define ASSERTIF(C, X) \ 1774 do { \ 1775 } while(0) 1776 1777 #define ASSERTIFCMP(C, X, OP, Y) \ 1778 do { \ 1779 } while(0) 1780 1781 #endif /* __KDEBUGALL */ 1782