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 32struct pagevec; 33struct afs_call; 34 35/* 36 * Partial file-locking emulation mode. (The problem being that AFS3 only 37 * allows whole-file locks and no upgrading/downgrading). 38 */ 39enum afs_flock_mode { 40 afs_flock_mode_unset, 41 afs_flock_mode_local, /* Local locking only */ 42 afs_flock_mode_openafs, /* Don't get server lock for a partial lock */ 43 afs_flock_mode_strict, /* Always get a server lock for a partial lock */ 44 afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */ 45}; 46 47struct afs_fs_context { 48 bool force; /* T to force cell type */ 49 bool autocell; /* T if set auto mount operation */ 50 bool dyn_root; /* T if dynamic root */ 51 bool no_cell; /* T if the source is "none" (for dynroot) */ 52 enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */ 53 afs_voltype_t type; /* type of volume requested */ 54 unsigned int volnamesz; /* size of volume name */ 55 const char *volname; /* name of volume to mount */ 56 struct afs_net *net; /* the AFS net namespace stuff */ 57 struct afs_cell *cell; /* cell in which to find volume */ 58 struct afs_volume *volume; /* volume record */ 59 struct key *key; /* key to use for secure mounting */ 60}; 61 62enum afs_call_state { 63 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ 64 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ 65 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ 66 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ 67 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ 68 AFS_CALL_SV_REPLYING, /* Server: Replying */ 69 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ 70 AFS_CALL_COMPLETE, /* Completed or failed */ 71}; 72 73/* 74 * List of server addresses. 75 */ 76struct afs_addr_list { 77 struct rcu_head rcu; 78 refcount_t usage; 79 u32 version; /* Version */ 80 unsigned char max_addrs; 81 unsigned char nr_addrs; 82 unsigned char preferred; /* Preferred address */ 83 unsigned char nr_ipv4; /* Number of IPv4 addresses */ 84 enum dns_record_source source:8; 85 enum dns_lookup_status status:8; 86 unsigned long failed; /* Mask of addrs that failed locally/ICMP */ 87 unsigned long responded; /* Mask of addrs that responded */ 88 struct sockaddr_rxrpc addrs[]; 89#define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8)) 90}; 91 92/* 93 * a record of an in-progress RxRPC call 94 */ 95struct afs_call { 96 const struct afs_call_type *type; /* type of call */ 97 struct afs_addr_list *alist; /* Address is alist[addr_ix] */ 98 wait_queue_head_t waitq; /* processes awaiting completion */ 99 struct work_struct async_work; /* async I/O processor */ 100 struct work_struct work; /* actual work processor */ 101 struct rxrpc_call *rxcall; /* RxRPC call handle */ 102 struct key *key; /* security for this call */ 103 struct afs_net *net; /* The network namespace */ 104 struct afs_server *server; /* The fileserver record if fs op (pins ref) */ 105 struct afs_vlserver *vlserver; /* The vlserver record if vl op */ 106 void *request; /* request data (first part) */ 107 struct iov_iter def_iter; /* Default buffer/data iterator */ 108 struct iov_iter *iter; /* Iterator currently in use */ 109 union { /* Convenience for ->def_iter */ 110 struct kvec kvec[1]; 111 struct bio_vec bvec[1]; 112 }; 113 void *buffer; /* reply receive buffer */ 114 union { 115 long ret0; /* Value to reply with instead of 0 */ 116 struct afs_addr_list *ret_alist; 117 struct afs_vldb_entry *ret_vldb; 118 char *ret_str; 119 }; 120 struct afs_operation *op; 121 unsigned int server_index; 122 atomic_t usage; 123 enum afs_call_state state; 124 spinlock_t state_lock; 125 int error; /* error code */ 126 u32 abort_code; /* Remote abort ID or 0 */ 127 unsigned int max_lifespan; /* Maximum lifespan to set if not 0 */ 128 unsigned request_size; /* size of request data */ 129 unsigned reply_max; /* maximum size of reply */ 130 unsigned count2; /* count used in unmarshalling */ 131 unsigned char unmarshall; /* unmarshalling phase */ 132 unsigned char addr_ix; /* Address in ->alist */ 133 bool drop_ref; /* T if need to drop ref for incoming call */ 134 bool send_pages; /* T if data from mapping should be sent */ 135 bool need_attention; /* T if RxRPC poked us */ 136 bool async; /* T if asynchronous */ 137 bool upgrade; /* T to request service upgrade */ 138 bool intr; /* T if interruptible */ 139 bool unmarshalling_error; /* T if an unmarshalling error occurred */ 140 u16 service_id; /* Actual service ID (after upgrade) */ 141 unsigned int debug_id; /* Trace ID */ 142 u32 operation_ID; /* operation ID for an incoming call */ 143 u32 count; /* count for use in unmarshalling */ 144 union { /* place to extract temporary data */ 145 struct { 146 __be32 tmp_u; 147 __be32 tmp; 148 } __attribute__((packed)); 149 __be64 tmp64; 150 }; 151 ktime_t issue_time; /* Time of issue of operation */ 152}; 153 154struct afs_call_type { 155 const char *name; 156 unsigned int op; /* Really enum afs_fs_operation */ 157 158 /* deliver request or reply data to an call 159 * - returning an error will cause the call to be aborted 160 */ 161 int (*deliver)(struct afs_call *call); 162 163 /* clean up a call */ 164 void (*destructor)(struct afs_call *call); 165 166 /* Work function */ 167 void (*work)(struct work_struct *work); 168 169 /* Call done function (gets called immediately on success or failure) */ 170 void (*done)(struct afs_call *call); 171}; 172 173/* 174 * Key available for writeback on a file. 175 */ 176struct afs_wb_key { 177 refcount_t usage; 178 struct key *key; 179 struct list_head vnode_link; /* Link in vnode->wb_keys */ 180}; 181 182/* 183 * AFS open file information record. Pointed to by file->private_data. 184 */ 185struct afs_file { 186 struct key *key; /* The key this file was opened with */ 187 struct afs_wb_key *wb; /* Writeback key record for this file */ 188}; 189 190static inline struct key *afs_file_key(struct file *file) 191{ 192 struct afs_file *af = file->private_data; 193 194 return af->key; 195} 196 197/* 198 * Record of an outstanding read operation on a vnode. 199 */ 200struct afs_read { 201 loff_t pos; /* Where to start reading */ 202 loff_t len; /* How much we're asking for */ 203 loff_t actual_len; /* How much we're actually getting */ 204 loff_t remain; /* Amount remaining */ 205 loff_t file_size; /* File size returned by server */ 206 afs_dataversion_t data_version; /* Version number returned by server */ 207 refcount_t usage; 208 unsigned int index; /* Which page we're reading into */ 209 unsigned int nr_pages; 210 unsigned int offset; /* offset into current page */ 211 struct afs_vnode *vnode; 212 void (*page_done)(struct afs_read *); 213 struct page **pages; 214 struct page *array[]; 215}; 216 217/* 218 * AFS superblock private data 219 * - there's one superblock per volume 220 */ 221struct afs_super_info { 222 struct net *net_ns; /* Network namespace */ 223 struct afs_cell *cell; /* The cell in which the volume resides */ 224 struct afs_volume *volume; /* volume record */ 225 enum afs_flock_mode flock_mode:8; /* File locking emulation mode */ 226 bool dyn_root; /* True if dynamic root */ 227}; 228 229static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) 230{ 231 return sb->s_fs_info; 232} 233 234extern struct file_system_type afs_fs_type; 235 236/* 237 * Set of substitutes for @sys. 238 */ 239struct afs_sysnames { 240#define AFS_NR_SYSNAME 16 241 char *subs[AFS_NR_SYSNAME]; 242 refcount_t usage; 243 unsigned short nr; 244 char blank[1]; 245}; 246 247/* 248 * AFS network namespace record. 249 */ 250struct afs_net { 251 struct net *net; /* Backpointer to the owning net namespace */ 252 struct afs_uuid uuid; 253 bool live; /* F if this namespace is being removed */ 254 255 /* AF_RXRPC I/O stuff */ 256 struct socket *socket; 257 struct afs_call *spare_incoming_call; 258 struct work_struct charge_preallocation_work; 259 struct mutex socket_mutex; 260 atomic_t nr_outstanding_calls; 261 atomic_t nr_superblocks; 262 263 /* Cell database */ 264 struct rb_root cells; 265 struct afs_cell *ws_cell; 266 struct work_struct cells_manager; 267 struct timer_list cells_timer; 268 atomic_t cells_outstanding; 269 struct rw_semaphore cells_lock; 270 struct mutex cells_alias_lock; 271 272 struct mutex proc_cells_lock; 273 struct hlist_head proc_cells; 274 275 /* Known servers. Theoretically each fileserver can only be in one 276 * cell, but in practice, people create aliases and subsets and there's 277 * no easy way to distinguish them. 278 */ 279 seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */ 280 struct rb_root fs_servers; /* afs_server (by server UUID or address) */ 281 struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */ 282 struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */ 283 struct hlist_head fs_proc; /* procfs servers list */ 284 285 struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ 286 struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */ 287 seqlock_t fs_addr_lock; /* For fs_addresses[46] */ 288 289 struct work_struct fs_manager; 290 struct timer_list fs_timer; 291 292 struct work_struct fs_prober; 293 struct timer_list fs_probe_timer; 294 atomic_t servers_outstanding; 295 296 /* File locking renewal management */ 297 struct mutex lock_manager_mutex; 298 299 /* Misc */ 300 struct super_block *dynroot_sb; /* Dynamic root mount superblock */ 301 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ 302 struct afs_sysnames *sysnames; 303 rwlock_t sysnames_lock; 304 305 /* Statistics counters */ 306 atomic_t n_lookup; /* Number of lookups done */ 307 atomic_t n_reval; /* Number of dentries needing revalidation */ 308 atomic_t n_inval; /* Number of invalidations by the server */ 309 atomic_t n_relpg; /* Number of invalidations by releasepage */ 310 atomic_t n_read_dir; /* Number of directory pages read */ 311 atomic_t n_dir_cr; /* Number of directory entry creation edits */ 312 atomic_t n_dir_rm; /* Number of directory entry removal edits */ 313 atomic_t n_stores; /* Number of store ops */ 314 atomic_long_t n_store_bytes; /* Number of bytes stored */ 315 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ 316 atomic_t n_fetches; /* Number of data fetch ops */ 317}; 318 319extern const char afs_init_sysname[]; 320 321enum afs_cell_state { 322 AFS_CELL_UNSET, 323 AFS_CELL_ACTIVATING, 324 AFS_CELL_ACTIVE, 325 AFS_CELL_DEACTIVATING, 326 AFS_CELL_INACTIVE, 327 AFS_CELL_FAILED, 328 AFS_CELL_REMOVED, 329}; 330 331/* 332 * AFS cell record. 333 * 334 * This is a tricky concept to get right as it is possible to create aliases 335 * simply by pointing AFSDB/SRV records for two names at the same set of VL 336 * servers; it is also possible to do things like setting up two sets of VL 337 * servers, one of which provides a superset of the volumes provided by the 338 * other (for internal/external division, for example). 339 * 340 * Cells only exist in the sense that (a) a cell's name maps to a set of VL 341 * servers and (b) a cell's name is used by the client to select the key to use 342 * for authentication and encryption. The cell name is not typically used in 343 * the protocol. 344 * 345 * Two cells are determined to be aliases if they have an explicit alias (YFS 346 * only), share any VL servers in common or have at least one volume in common. 347 * "In common" means that the address list of the VL servers or the fileservers 348 * share at least one endpoint. 349 */ 350struct afs_cell { 351 union { 352 struct rcu_head rcu; 353 struct rb_node net_node; /* Node in net->cells */ 354 }; 355 struct afs_net *net; 356 struct afs_cell *alias_of; /* The cell this is an alias of */ 357 struct afs_volume *root_volume; /* The root.cell volume if there is one */ 358 struct key *anonymous_key; /* anonymous user key for this cell */ 359 struct work_struct manager; /* Manager for init/deinit/dns */ 360 struct hlist_node proc_link; /* /proc cell list link */ 361#ifdef CONFIG_AFS_FSCACHE 362 struct fscache_cookie *cache; /* caching cookie */ 363#endif 364 time64_t dns_expiry; /* Time AFSDB/SRV record expires */ 365 time64_t last_inactive; /* Time of last drop of usage count */ 366 atomic_t ref; /* Struct refcount */ 367 atomic_t active; /* Active usage counter */ 368 unsigned long flags; 369#define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */ 370#define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */ 371#define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */ 372 enum afs_cell_state state; 373 short error; 374 enum dns_record_source dns_source:8; /* Latest source of data from lookup */ 375 enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */ 376 unsigned int dns_lookup_count; /* Counter of DNS lookups */ 377 unsigned int debug_id; 378 379 /* The volumes belonging to this cell */ 380 struct rb_root volumes; /* Tree of volumes on this server */ 381 struct hlist_head proc_volumes; /* procfs volume list */ 382 seqlock_t volume_lock; /* For volumes */ 383 384 /* Active fileserver interaction state. */ 385 struct rb_root fs_servers; /* afs_server (by server UUID) */ 386 seqlock_t fs_lock; /* For fs_servers */ 387 388 /* VL server list. */ 389 rwlock_t vl_servers_lock; /* Lock on vl_servers */ 390 struct afs_vlserver_list __rcu *vl_servers; 391 392 u8 name_len; /* Length of name */ 393 char *name; /* Cell name, case-flattened and NUL-padded */ 394}; 395 396/* 397 * Volume Location server record. 398 */ 399struct afs_vlserver { 400 struct rcu_head rcu; 401 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */ 402 unsigned long flags; 403#define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ 404#define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ 405#define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ 406#define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */ 407 rwlock_t lock; /* Lock on addresses */ 408 atomic_t usage; 409 unsigned int rtt; /* Server's current RTT in uS */ 410 411 /* Probe state */ 412 wait_queue_head_t probe_wq; 413 atomic_t probe_outstanding; 414 spinlock_t probe_lock; 415 struct { 416 unsigned int rtt; /* RTT in uS */ 417 u32 abort_code; 418 short error; 419 unsigned short flags; 420#define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */ 421#define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */ 422#define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */ 423#define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */ 424 } probe; 425 426 u16 port; 427 u16 name_len; /* Length of name */ 428 char name[]; /* Server name, case-flattened */ 429}; 430 431/* 432 * Weighted list of Volume Location servers. 433 */ 434struct afs_vlserver_entry { 435 u16 priority; /* Preference (as SRV) */ 436 u16 weight; /* Weight (as SRV) */ 437 enum dns_record_source source:8; 438 enum dns_lookup_status status:8; 439 struct afs_vlserver *server; 440}; 441 442struct afs_vlserver_list { 443 struct rcu_head rcu; 444 atomic_t usage; 445 u8 nr_servers; 446 u8 index; /* Server currently in use */ 447 u8 preferred; /* Preferred server */ 448 enum dns_record_source source:8; 449 enum dns_lookup_status status:8; 450 rwlock_t lock; 451 struct afs_vlserver_entry servers[]; 452}; 453 454/* 455 * Cached VLDB entry. 456 * 457 * This is pointed to by cell->vldb_entries, indexed by name. 458 */ 459struct afs_vldb_entry { 460 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ 461 462 unsigned long flags; 463#define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ 464#define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ 465#define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ 466#define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ 467#define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ 468 469 uuid_t fs_server[AFS_NMAXNSERVERS]; 470 u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */ 471 u8 fs_mask[AFS_NMAXNSERVERS]; 472#define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 473#define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 474#define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 475 short error; 476 u8 nr_servers; /* Number of server records */ 477 u8 name_len; 478 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 479}; 480 481/* 482 * Record of fileserver with which we're actively communicating. 483 */ 484struct afs_server { 485 struct rcu_head rcu; 486 union { 487 uuid_t uuid; /* Server ID */ 488 struct afs_uuid _uuid; 489 }; 490 491 struct afs_addr_list __rcu *addresses; 492 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 493 struct rb_node uuid_rb; /* Link in net->fs_servers */ 494 struct afs_server __rcu *uuid_next; /* Next server with same UUID */ 495 struct afs_server *uuid_prev; /* Previous server with same UUID */ 496 struct list_head probe_link; /* Link in net->fs_probe_list */ 497 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ 498 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ 499 struct hlist_node proc_link; /* Link in net->fs_proc */ 500 struct afs_server *gc_next; /* Next server in manager's list */ 501 time64_t unuse_time; /* Time at which last unused */ 502 unsigned long flags; 503#define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */ 504#define AFS_SERVER_FL_UPDATING 1 505#define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */ 506#define AFS_SERVER_FL_NOT_READY 4 /* The record is not ready for use */ 507#define AFS_SERVER_FL_NOT_FOUND 5 /* VL server says no such server */ 508#define AFS_SERVER_FL_VL_FAIL 6 /* Failed to access VL server */ 509#define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ 510#define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */ 511#define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */ 512#define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */ 513 atomic_t ref; /* Object refcount */ 514 atomic_t active; /* Active user count */ 515 u32 addr_version; /* Address list version */ 516 unsigned int rtt; /* Server's current RTT in uS */ 517 unsigned int debug_id; /* Debugging ID for traces */ 518 519 /* file service access */ 520 rwlock_t fs_lock; /* access lock */ 521 522 /* callback promise management */ 523 unsigned cb_s_break; /* Break-everything counter. */ 524 525 /* Probe state */ 526 unsigned long probed_at; /* Time last probe was dispatched (jiffies) */ 527 wait_queue_head_t probe_wq; 528 atomic_t probe_outstanding; 529 spinlock_t probe_lock; 530 struct { 531 unsigned int rtt; /* RTT in uS */ 532 u32 abort_code; 533 short error; 534 bool responded:1; 535 bool is_yfs:1; 536 bool not_yfs:1; 537 bool local_failure:1; 538 } probe; 539}; 540 541/* 542 * Replaceable volume server list. 543 */ 544struct afs_server_entry { 545 struct afs_server *server; 546}; 547 548struct afs_server_list { 549 struct rcu_head rcu; 550 afs_volid_t vids[AFS_MAXTYPES]; /* Volume IDs */ 551 refcount_t usage; 552 unsigned char nr_servers; 553 unsigned char preferred; /* Preferred server */ 554 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ 555 unsigned int seq; /* Set to ->servers_seq when installed */ 556 rwlock_t lock; 557 struct afs_server_entry servers[]; 558}; 559 560/* 561 * Live AFS volume management. 562 */ 563struct afs_volume { 564 union { 565 struct rcu_head rcu; 566 afs_volid_t vid; /* volume ID */ 567 }; 568 atomic_t usage; 569 time64_t update_at; /* Time at which to next update */ 570 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 571 struct rb_node cell_node; /* Link in cell->volumes */ 572 struct hlist_node proc_link; /* Link in cell->proc_volumes */ 573 struct super_block __rcu *sb; /* Superblock on which inodes reside */ 574 unsigned long flags; 575#define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ 576#define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ 577#define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ 578#define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ 579#define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ 580#define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ 581#define AFS_VOLUME_MAYBE_NO_IBULK 6 /* - T if some servers don't have InlineBulkStatus */ 582#ifdef CONFIG_AFS_FSCACHE 583 struct fscache_cookie *cache; /* caching cookie */ 584#endif 585 struct afs_server_list __rcu *servers; /* List of servers on which volume resides */ 586 rwlock_t servers_lock; /* Lock for ->servers */ 587 unsigned int servers_seq; /* Incremented each time ->servers changes */ 588 589 unsigned cb_v_break; /* Break-everything counter. */ 590 rwlock_t cb_v_break_lock; 591 592 afs_voltype_t type; /* type of volume */ 593 char type_force; /* force volume type (suppress R/O -> R/W) */ 594 u8 name_len; 595 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 596}; 597 598enum afs_lock_state { 599 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ 600 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ 601 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ 602 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ 603 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ 604 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ 605 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ 606 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */ 607}; 608 609/* 610 * AFS inode private data. 611 * 612 * Note that afs_alloc_inode() *must* reset anything that could incorrectly 613 * leak from one inode to another. 614 */ 615struct afs_vnode { 616 struct inode vfs_inode; /* the VFS's inode record */ 617 618 struct afs_volume *volume; /* volume on which vnode resides */ 619 struct afs_fid fid; /* the file identifier for this inode */ 620 struct afs_file_status status; /* AFS status info for this file */ 621 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ 622#ifdef CONFIG_AFS_FSCACHE 623 struct fscache_cookie *cache; /* caching cookie */ 624#endif 625 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ 626 struct mutex io_lock; /* Lock for serialising I/O on this mutex */ 627 struct rw_semaphore validate_lock; /* lock for validating this vnode */ 628 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ 629 struct key *silly_key; /* Silly rename key */ 630 spinlock_t wb_lock; /* lock for wb_keys */ 631 spinlock_t lock; /* waitqueue/flags lock */ 632 unsigned long flags; 633#define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ 634#define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 635#define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ 636#define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 637#define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 638#define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 639#define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ 640#define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ 641#define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ 642#define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */ 643#define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */ 644 645 struct list_head wb_keys; /* List of keys available for writeback */ 646 struct list_head pending_locks; /* locks waiting to be granted */ 647 struct list_head granted_locks; /* locks granted on this file */ 648 struct delayed_work lock_work; /* work to be done in locking */ 649 struct key *lock_key; /* Key to be used in lock ops */ 650 ktime_t locked_at; /* Time at which lock obtained */ 651 enum afs_lock_state lock_state : 8; 652 afs_lock_type_t lock_type : 8; 653 654 /* outstanding callback notification on this file */ 655 void *cb_server; /* Server with callback/filelock */ 656 unsigned int cb_s_break; /* Mass break counter on ->server */ 657 unsigned int cb_v_break; /* Mass break counter on ->volume */ 658 unsigned int cb_break; /* Break counter on vnode */ 659 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ 660 661 time64_t cb_expires_at; /* time at which callback expires */ 662}; 663 664static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) 665{ 666#ifdef CONFIG_AFS_FSCACHE 667 return vnode->cache; 668#else 669 return NULL; 670#endif 671} 672 673/* 674 * cached security record for one user's attempt to access a vnode 675 */ 676struct afs_permit { 677 struct key *key; /* RxRPC ticket holding a security context */ 678 afs_access_t access; /* CallerAccess value for this key */ 679}; 680 681/* 682 * Immutable cache of CallerAccess records from attempts to access vnodes. 683 * These may be shared between multiple vnodes. 684 */ 685struct afs_permits { 686 struct rcu_head rcu; 687 struct hlist_node hash_node; /* Link in hash */ 688 unsigned long h; /* Hash value for this permit list */ 689 refcount_t usage; 690 unsigned short nr_permits; /* Number of records */ 691 bool invalidated; /* Invalidated due to key change */ 692 struct afs_permit permits[]; /* List of permits sorted by key pointer */ 693}; 694 695/* 696 * Error prioritisation and accumulation. 697 */ 698struct afs_error { 699 short error; /* Accumulated error */ 700 bool responded; /* T if server responded */ 701}; 702 703/* 704 * Cursor for iterating over a server's address list. 705 */ 706struct afs_addr_cursor { 707 struct afs_addr_list *alist; /* Current address list (pins ref) */ 708 unsigned long tried; /* Tried addresses */ 709 signed char index; /* Current address */ 710 bool responded; /* T if the current address responded */ 711 unsigned short nr_iterations; /* Number of address iterations */ 712 short error; 713 u32 abort_code; 714}; 715 716/* 717 * Cursor for iterating over a set of volume location servers. 718 */ 719struct afs_vl_cursor { 720 struct afs_addr_cursor ac; 721 struct afs_cell *cell; /* The cell we're querying */ 722 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ 723 struct afs_vlserver *server; /* Server on which this resides */ 724 struct key *key; /* Key for the server */ 725 unsigned long untried; /* Bitmask of untried servers */ 726 short index; /* Current server */ 727 short error; 728 unsigned short flags; 729#define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ 730#define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ 731#define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ 732 unsigned short nr_iterations; /* Number of server iterations */ 733}; 734 735/* 736 * Fileserver operation methods. 737 */ 738struct afs_operation_ops { 739 void (*issue_afs_rpc)(struct afs_operation *op); 740 void (*issue_yfs_rpc)(struct afs_operation *op); 741 void (*success)(struct afs_operation *op); 742 void (*aborted)(struct afs_operation *op); 743 void (*edit_dir)(struct afs_operation *op); 744 void (*put)(struct afs_operation *op); 745}; 746 747struct afs_vnode_param { 748 struct afs_vnode *vnode; 749 struct afs_fid fid; /* Fid to access */ 750 struct afs_status_cb scb; /* Returned status and callback promise */ 751 afs_dataversion_t dv_before; /* Data version before the call */ 752 unsigned int cb_break_before; /* cb_break + cb_s_break before the call */ 753 u8 dv_delta; /* Expected change in data version */ 754 bool put_vnode:1; /* T if we have a ref on the vnode */ 755 bool need_io_lock:1; /* T if we need the I/O lock on this */ 756 bool update_ctime:1; /* Need to update the ctime */ 757 bool set_size:1; /* Must update i_size */ 758 bool op_unlinked:1; /* True if file was unlinked by op */ 759 bool speculative:1; /* T if speculative status fetch (no vnode lock) */ 760 bool modification:1; /* Set if the content gets modified */ 761}; 762 763/* 764 * Fileserver operation wrapper, handling server and address rotation 765 * asynchronously. May make simultaneous calls to multiple servers. 766 */ 767struct afs_operation { 768 struct afs_net *net; /* Network namespace */ 769 struct key *key; /* Key for the cell */ 770 const struct afs_call_type *type; /* Type of call done */ 771 const struct afs_operation_ops *ops; 772 773 /* Parameters/results for the operation */ 774 struct afs_volume *volume; /* Volume being accessed */ 775 struct afs_vnode_param file[2]; 776 struct afs_vnode_param *more_files; 777 struct afs_volsync volsync; 778 struct dentry *dentry; /* Dentry to be altered */ 779 struct dentry *dentry_2; /* Second dentry to be altered */ 780 struct timespec64 mtime; /* Modification time to record */ 781 struct timespec64 ctime; /* Change time to set */ 782 short nr_files; /* Number of entries in file[], more_files */ 783 short error; 784 unsigned int debug_id; 785 786 unsigned int cb_v_break; /* Volume break counter before op */ 787 unsigned int cb_s_break; /* Server break counter before op */ 788 789 union { 790 struct { 791 int which; /* Which ->file[] to fetch for */ 792 } fetch_status; 793 struct { 794 int reason; /* enum afs_edit_dir_reason */ 795 mode_t mode; 796 const char *symlink; 797 } create; 798 struct { 799 bool need_rehash; 800 } unlink; 801 struct { 802 struct dentry *rehash; 803 struct dentry *tmp; 804 bool new_negative; 805 } rename; 806 struct { 807 struct afs_read *req; 808 } fetch; 809 struct { 810 afs_lock_type_t type; 811 } lock; 812 struct { 813 struct address_space *mapping; /* Pages being written from */ 814 pgoff_t first; /* first page in mapping to deal with */ 815 pgoff_t last; /* last page in mapping to deal with */ 816 unsigned first_offset; /* offset into mapping[first] */ 817 unsigned last_to; /* amount of mapping[last] */ 818 bool laundering; /* Laundering page, PG_writeback not set */ 819 } store; 820 struct { 821 struct iattr *attr; 822 loff_t old_i_size; 823 } setattr; 824 struct afs_acl *acl; 825 struct yfs_acl *yacl; 826 struct { 827 struct afs_volume_status vs; 828 struct kstatfs *buf; 829 } volstatus; 830 }; 831 832 /* Fileserver iteration state */ 833 struct afs_addr_cursor ac; 834 struct afs_server_list *server_list; /* Current server list (pins ref) */ 835 struct afs_server *server; /* Server we're using (ref pinned by server_list) */ 836 struct afs_call *call; 837 unsigned long untried; /* Bitmask of untried servers */ 838 short index; /* Current server */ 839 unsigned short nr_iterations; /* Number of server iterations */ 840 841 unsigned int flags; 842#define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ 843#define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ 844#define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ 845#define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ 846#define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ 847#define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ 848#define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ 849#define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ 850#define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ 851#define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ 852#define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ 853#define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ 854#define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ 855}; 856 857/* 858 * Cache auxiliary data. 859 */ 860struct afs_vnode_cache_aux { 861 u64 data_version; 862} __packed; 863 864/* 865 * We use page->private to hold the amount of the page that we've written to, 866 * splitting the field into two parts. However, we need to represent a range 867 * 0...PAGE_SIZE, so we reduce the resolution if the size of the page 868 * exceeds what we can encode. 869 */ 870#ifdef CONFIG_64BIT 871#define __AFS_PAGE_PRIV_MASK 0x7fffffffUL 872#define __AFS_PAGE_PRIV_SHIFT 32 873#define __AFS_PAGE_PRIV_MMAPPED 0x80000000UL 874#else 875#define __AFS_PAGE_PRIV_MASK 0x7fffUL 876#define __AFS_PAGE_PRIV_SHIFT 16 877#define __AFS_PAGE_PRIV_MMAPPED 0x8000UL 878#endif 879 880static inline unsigned int afs_page_dirty_resolution(void) 881{ 882 int shift = PAGE_SHIFT - (__AFS_PAGE_PRIV_SHIFT - 1); 883 return (shift > 0) ? shift : 0; 884} 885 886static inline size_t afs_page_dirty_from(unsigned long priv) 887{ 888 unsigned long x = priv & __AFS_PAGE_PRIV_MASK; 889 890 /* The lower bound is inclusive */ 891 return x << afs_page_dirty_resolution(); 892} 893 894static inline size_t afs_page_dirty_to(unsigned long priv) 895{ 896 unsigned long x = (priv >> __AFS_PAGE_PRIV_SHIFT) & __AFS_PAGE_PRIV_MASK; 897 898 /* The upper bound is immediately beyond the region */ 899 return (x + 1) << afs_page_dirty_resolution(); 900} 901 902static inline unsigned long afs_page_dirty(size_t from, size_t to) 903{ 904 unsigned int res = afs_page_dirty_resolution(); 905 from >>= res; 906 to = (to - 1) >> res; 907 return (to << __AFS_PAGE_PRIV_SHIFT) | from; 908} 909 910static inline unsigned long afs_page_dirty_mmapped(unsigned long priv) 911{ 912 return priv | __AFS_PAGE_PRIV_MMAPPED; 913} 914 915static inline bool afs_is_page_dirty_mmapped(unsigned long priv) 916{ 917 return priv & __AFS_PAGE_PRIV_MMAPPED; 918} 919 920#include <trace/events/afs.h> 921 922/*****************************************************************************/ 923/* 924 * addr_list.c 925 */ 926static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist) 927{ 928 if (alist) 929 refcount_inc(&alist->usage); 930 return alist; 931} 932extern struct afs_addr_list *afs_alloc_addrlist(unsigned int, 933 unsigned short, 934 unsigned short); 935extern void afs_put_addrlist(struct afs_addr_list *); 936extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, 937 const char *, size_t, char, 938 unsigned short, unsigned short); 939extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); 940extern bool afs_iterate_addresses(struct afs_addr_cursor *); 941extern int afs_end_cursor(struct afs_addr_cursor *); 942 943extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16); 944extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16); 945 946/* 947 * cache.c 948 */ 949#ifdef CONFIG_AFS_FSCACHE 950extern struct fscache_netfs afs_cache_netfs; 951extern struct fscache_cookie_def afs_cell_cache_index_def; 952extern struct fscache_cookie_def afs_volume_cache_index_def; 953extern struct fscache_cookie_def afs_vnode_cache_index_def; 954#else 955#define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL) 956#define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL) 957#define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL) 958#endif 959 960/* 961 * callback.c 962 */ 963extern void afs_init_callback_state(struct afs_server *); 964extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 965extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 966extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); 967 968static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) 969{ 970 return vnode->cb_break + vnode->cb_v_break; 971} 972 973static inline bool afs_cb_is_broken(unsigned int cb_break, 974 const struct afs_vnode *vnode) 975{ 976 return cb_break != (vnode->cb_break + vnode->volume->cb_v_break); 977} 978 979/* 980 * cell.c 981 */ 982extern int afs_cell_init(struct afs_net *, const char *); 983extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, 984 enum afs_cell_trace); 985extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, 986 const char *, bool); 987extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); 988extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace); 989extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); 990extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); 991extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); 992extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); 993extern void afs_manage_cells(struct work_struct *); 994extern void afs_cells_timer(struct timer_list *); 995extern void __net_exit afs_cell_purge(struct afs_net *); 996 997/* 998 * cmservice.c 999 */ 1000extern bool afs_cm_incoming_call(struct afs_call *); 1001 1002/* 1003 * dir.c 1004 */ 1005extern const struct file_operations afs_dir_file_operations; 1006extern const struct inode_operations afs_dir_inode_operations; 1007extern const struct address_space_operations afs_dir_aops; 1008extern const struct dentry_operations afs_fs_dentry_operations; 1009 1010extern void afs_d_release(struct dentry *); 1011extern void afs_check_for_remote_deletion(struct afs_operation *); 1012 1013/* 1014 * dir_edit.c 1015 */ 1016extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, 1017 enum afs_edit_dir_reason); 1018extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); 1019 1020/* 1021 * dir_silly.c 1022 */ 1023extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, 1024 struct dentry *, struct key *); 1025extern int afs_silly_iput(struct dentry *, struct inode *); 1026 1027/* 1028 * dynroot.c 1029 */ 1030extern const struct inode_operations afs_dynroot_inode_operations; 1031extern const struct dentry_operations afs_dynroot_dentry_operations; 1032 1033extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); 1034extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); 1035extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); 1036extern int afs_dynroot_populate(struct super_block *); 1037extern void afs_dynroot_depopulate(struct super_block *); 1038 1039/* 1040 * file.c 1041 */ 1042extern const struct address_space_operations afs_fs_aops; 1043extern const struct inode_operations afs_file_inode_operations; 1044extern const struct file_operations afs_file_operations; 1045 1046extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); 1047extern void afs_put_wb_key(struct afs_wb_key *); 1048extern int afs_open(struct inode *, struct file *); 1049extern int afs_release(struct inode *, struct file *); 1050extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *); 1051extern int afs_page_filler(void *, struct page *); 1052extern void afs_put_read(struct afs_read *); 1053 1054static inline struct afs_read *afs_get_read(struct afs_read *req) 1055{ 1056 refcount_inc(&req->usage); 1057 return req; 1058} 1059 1060/* 1061 * flock.c 1062 */ 1063extern struct workqueue_struct *afs_lock_manager; 1064 1065extern void afs_lock_op_done(struct afs_call *); 1066extern void afs_lock_work(struct work_struct *); 1067extern void afs_lock_may_be_available(struct afs_vnode *); 1068extern int afs_lock(struct file *, int, struct file_lock *); 1069extern int afs_flock(struct file *, int, struct file_lock *); 1070 1071/* 1072 * fsclient.c 1073 */ 1074extern void afs_fs_fetch_status(struct afs_operation *); 1075extern void afs_fs_fetch_data(struct afs_operation *); 1076extern void afs_fs_create_file(struct afs_operation *); 1077extern void afs_fs_make_dir(struct afs_operation *); 1078extern void afs_fs_remove_file(struct afs_operation *); 1079extern void afs_fs_remove_dir(struct afs_operation *); 1080extern void afs_fs_link(struct afs_operation *); 1081extern void afs_fs_symlink(struct afs_operation *); 1082extern void afs_fs_rename(struct afs_operation *); 1083extern void afs_fs_store_data(struct afs_operation *); 1084extern void afs_fs_setattr(struct afs_operation *); 1085extern void afs_fs_get_volume_status(struct afs_operation *); 1086extern void afs_fs_set_lock(struct afs_operation *); 1087extern void afs_fs_extend_lock(struct afs_operation *); 1088extern void afs_fs_release_lock(struct afs_operation *); 1089extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *, 1090 struct afs_addr_cursor *, struct key *); 1091extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *, 1092 struct afs_addr_cursor *, struct key *); 1093extern void afs_fs_inline_bulk_status(struct afs_operation *); 1094 1095struct afs_acl { 1096 u32 size; 1097 u8 data[]; 1098}; 1099 1100extern void afs_fs_fetch_acl(struct afs_operation *); 1101extern void afs_fs_store_acl(struct afs_operation *); 1102 1103/* 1104 * fs_operation.c 1105 */ 1106extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); 1107extern int afs_put_operation(struct afs_operation *); 1108extern bool afs_begin_vnode_operation(struct afs_operation *); 1109extern void afs_wait_for_operation(struct afs_operation *); 1110extern int afs_do_sync_operation(struct afs_operation *); 1111 1112static inline void afs_op_nomem(struct afs_operation *op) 1113{ 1114 op->error = -ENOMEM; 1115} 1116 1117static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, 1118 struct afs_vnode *vnode) 1119{ 1120 op->file[n].vnode = vnode; 1121 op->file[n].need_io_lock = true; 1122} 1123 1124static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, 1125 const struct afs_fid *fid) 1126{ 1127 op->file[n].fid = *fid; 1128} 1129 1130/* 1131 * fs_probe.c 1132 */ 1133extern void afs_fileserver_probe_result(struct afs_call *); 1134extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool); 1135extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long); 1136extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); 1137extern void afs_fs_probe_dispatcher(struct work_struct *); 1138extern int afs_wait_for_one_fs_probe(struct afs_server *, bool); 1139extern void afs_fs_probe_cleanup(struct afs_net *); 1140 1141/* 1142 * inode.c 1143 */ 1144extern const struct afs_operation_ops afs_fetch_status_operation; 1145 1146extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); 1147extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); 1148extern int afs_ilookup5_test_by_fid(struct inode *, void *); 1149extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); 1150extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); 1151extern struct inode *afs_root_iget(struct super_block *, struct key *); 1152extern bool afs_check_validity(struct afs_vnode *); 1153extern int afs_validate(struct afs_vnode *, struct key *); 1154extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int); 1155extern int afs_setattr(struct dentry *, struct iattr *); 1156extern void afs_evict_inode(struct inode *); 1157extern int afs_drop_inode(struct inode *); 1158 1159/* 1160 * main.c 1161 */ 1162extern struct workqueue_struct *afs_wq; 1163extern int afs_net_id; 1164 1165static inline struct afs_net *afs_net(struct net *net) 1166{ 1167 return net_generic(net, afs_net_id); 1168} 1169 1170static inline struct afs_net *afs_sb2net(struct super_block *sb) 1171{ 1172 return afs_net(AFS_FS_S(sb)->net_ns); 1173} 1174 1175static inline struct afs_net *afs_d2net(struct dentry *dentry) 1176{ 1177 return afs_sb2net(dentry->d_sb); 1178} 1179 1180static inline struct afs_net *afs_i2net(struct inode *inode) 1181{ 1182 return afs_sb2net(inode->i_sb); 1183} 1184 1185static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 1186{ 1187 return afs_i2net(&vnode->vfs_inode); 1188} 1189 1190static inline struct afs_net *afs_sock2net(struct sock *sk) 1191{ 1192 return net_generic(sock_net(sk), afs_net_id); 1193} 1194 1195static inline void __afs_stat(atomic_t *s) 1196{ 1197 atomic_inc(s); 1198} 1199 1200#define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) 1201 1202/* 1203 * misc.c 1204 */ 1205extern int afs_abort_to_error(u32); 1206extern void afs_prioritise_error(struct afs_error *, int, u32); 1207 1208/* 1209 * mntpt.c 1210 */ 1211extern const struct inode_operations afs_mntpt_inode_operations; 1212extern const struct inode_operations afs_autocell_inode_operations; 1213extern const struct file_operations afs_mntpt_file_operations; 1214 1215extern struct vfsmount *afs_d_automount(struct path *); 1216extern void afs_mntpt_kill_timer(void); 1217 1218/* 1219 * proc.c 1220 */ 1221#ifdef CONFIG_PROC_FS 1222extern int __net_init afs_proc_init(struct afs_net *); 1223extern void __net_exit afs_proc_cleanup(struct afs_net *); 1224extern int afs_proc_cell_setup(struct afs_cell *); 1225extern void afs_proc_cell_remove(struct afs_cell *); 1226extern void afs_put_sysnames(struct afs_sysnames *); 1227#else 1228static inline int afs_proc_init(struct afs_net *net) { return 0; } 1229static inline void afs_proc_cleanup(struct afs_net *net) {} 1230static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } 1231static inline void afs_proc_cell_remove(struct afs_cell *cell) {} 1232static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} 1233#endif 1234 1235/* 1236 * rotate.c 1237 */ 1238extern bool afs_select_fileserver(struct afs_operation *); 1239extern void afs_dump_edestaddrreq(const struct afs_operation *); 1240 1241/* 1242 * rxrpc.c 1243 */ 1244extern struct workqueue_struct *afs_async_calls; 1245 1246extern int __net_init afs_open_socket(struct afs_net *); 1247extern void __net_exit afs_close_socket(struct afs_net *); 1248extern void afs_charge_preallocation(struct work_struct *); 1249extern void afs_put_call(struct afs_call *); 1250extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t); 1251extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *); 1252extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 1253 const struct afs_call_type *, 1254 size_t, size_t); 1255extern void afs_flat_call_destructor(struct afs_call *); 1256extern void afs_send_empty_reply(struct afs_call *); 1257extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 1258extern int afs_extract_data(struct afs_call *, bool); 1259extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); 1260 1261static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, 1262 gfp_t gfp) 1263{ 1264 op->call = call; 1265 op->type = call->type; 1266 call->op = op; 1267 call->key = op->key; 1268 call->intr = !(op->flags & AFS_OPERATION_UNINTR); 1269 afs_make_call(&op->ac, call, gfp); 1270} 1271 1272static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) 1273{ 1274 call->kvec[0].iov_base = buf; 1275 call->kvec[0].iov_len = size; 1276 iov_iter_kvec(&call->def_iter, READ, call->kvec, 1, size); 1277} 1278 1279static inline void afs_extract_to_tmp(struct afs_call *call) 1280{ 1281 afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); 1282} 1283 1284static inline void afs_extract_to_tmp64(struct afs_call *call) 1285{ 1286 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); 1287} 1288 1289static inline void afs_extract_discard(struct afs_call *call, size_t size) 1290{ 1291 iov_iter_discard(&call->def_iter, READ, size); 1292} 1293 1294static inline void afs_extract_to_buf(struct afs_call *call, size_t size) 1295{ 1296 afs_extract_begin(call, call->buffer, size); 1297} 1298 1299static inline int afs_transfer_reply(struct afs_call *call) 1300{ 1301 return afs_extract_data(call, false); 1302} 1303 1304static inline bool afs_check_call_state(struct afs_call *call, 1305 enum afs_call_state state) 1306{ 1307 return READ_ONCE(call->state) == state; 1308} 1309 1310static inline bool afs_set_call_state(struct afs_call *call, 1311 enum afs_call_state from, 1312 enum afs_call_state to) 1313{ 1314 bool ok = false; 1315 1316 spin_lock_bh(&call->state_lock); 1317 if (call->state == from) { 1318 call->state = to; 1319 trace_afs_call_state(call, from, to, 0, 0); 1320 ok = true; 1321 } 1322 spin_unlock_bh(&call->state_lock); 1323 return ok; 1324} 1325 1326static inline void afs_set_call_complete(struct afs_call *call, 1327 int error, u32 remote_abort) 1328{ 1329 enum afs_call_state state; 1330 bool ok = false; 1331 1332 spin_lock_bh(&call->state_lock); 1333 state = call->state; 1334 if (state != AFS_CALL_COMPLETE) { 1335 call->abort_code = remote_abort; 1336 call->error = error; 1337 call->state = AFS_CALL_COMPLETE; 1338 trace_afs_call_state(call, state, AFS_CALL_COMPLETE, 1339 error, remote_abort); 1340 ok = true; 1341 } 1342 spin_unlock_bh(&call->state_lock); 1343 if (ok) { 1344 trace_afs_call_done(call); 1345 1346 /* Asynchronous calls have two refs to release - one from the alloc and 1347 * one queued with the work item - and we can't just deallocate the 1348 * call because the work item may be queued again. 1349 */ 1350 if (call->drop_ref) 1351 afs_put_call(call); 1352 } 1353} 1354 1355/* 1356 * security.c 1357 */ 1358extern void afs_put_permits(struct afs_permits *); 1359extern void afs_clear_permits(struct afs_vnode *); 1360extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, 1361 struct afs_status_cb *); 1362extern void afs_zap_permits(struct rcu_head *); 1363extern struct key *afs_request_key(struct afs_cell *); 1364extern struct key *afs_request_key_rcu(struct afs_cell *); 1365extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); 1366extern int afs_permission(struct inode *, int); 1367extern void __exit afs_clean_up_permit_cache(void); 1368 1369/* 1370 * server.c 1371 */ 1372extern spinlock_t afs_server_peer_lock; 1373 1374extern struct afs_server *afs_find_server(struct afs_net *, 1375 const struct sockaddr_rxrpc *); 1376extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); 1377extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); 1378extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); 1379extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace); 1380extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1381extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace); 1382extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1383extern void afs_manage_servers(struct work_struct *); 1384extern void afs_servers_timer(struct timer_list *); 1385extern void afs_fs_probe_timer(struct timer_list *); 1386extern void __net_exit afs_purge_servers(struct afs_net *); 1387extern bool afs_check_server_record(struct afs_operation *, struct afs_server *); 1388 1389static inline void afs_inc_servers_outstanding(struct afs_net *net) 1390{ 1391 atomic_inc(&net->servers_outstanding); 1392} 1393 1394static inline void afs_dec_servers_outstanding(struct afs_net *net) 1395{ 1396 if (atomic_dec_and_test(&net->servers_outstanding)) 1397 wake_up_var(&net->servers_outstanding); 1398} 1399 1400static inline bool afs_is_probing_server(struct afs_server *server) 1401{ 1402 return list_empty(&server->probe_link); 1403} 1404 1405/* 1406 * server_list.c 1407 */ 1408static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) 1409{ 1410 refcount_inc(&slist->usage); 1411 return slist; 1412} 1413 1414extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); 1415extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *, 1416 struct afs_vldb_entry *, 1417 u8); 1418extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); 1419 1420/* 1421 * super.c 1422 */ 1423extern int __init afs_fs_init(void); 1424extern void afs_fs_exit(void); 1425 1426/* 1427 * vlclient.c 1428 */ 1429extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, 1430 const char *, int); 1431extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); 1432extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, 1433 struct key *, struct afs_vlserver *, unsigned int); 1434extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); 1435extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); 1436 1437/* 1438 * vl_alias.c 1439 */ 1440extern int afs_cell_detect_alias(struct afs_cell *, struct key *); 1441 1442/* 1443 * vl_probe.c 1444 */ 1445extern void afs_vlserver_probe_result(struct afs_call *); 1446extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); 1447extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); 1448 1449/* 1450 * vl_rotate.c 1451 */ 1452extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, 1453 struct afs_cell *, struct key *); 1454extern bool afs_select_vlserver(struct afs_vl_cursor *); 1455extern bool afs_select_current_vlserver(struct afs_vl_cursor *); 1456extern int afs_end_vlserver_operation(struct afs_vl_cursor *); 1457 1458/* 1459 * vlserver_list.c 1460 */ 1461static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) 1462{ 1463 atomic_inc(&vlserver->usage); 1464 return vlserver; 1465} 1466 1467static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) 1468{ 1469 if (vllist) 1470 atomic_inc(&vllist->usage); 1471 return vllist; 1472} 1473 1474extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); 1475extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); 1476extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); 1477extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); 1478extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, 1479 const void *, size_t); 1480 1481/* 1482 * volume.c 1483 */ 1484extern struct afs_volume *afs_create_volume(struct afs_fs_context *); 1485extern void afs_activate_volume(struct afs_volume *); 1486extern void afs_deactivate_volume(struct afs_volume *); 1487extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); 1488extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace); 1489extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); 1490 1491/* 1492 * write.c 1493 */ 1494extern int afs_set_page_dirty(struct page *); 1495extern int afs_write_begin(struct file *file, struct address_space *mapping, 1496 loff_t pos, unsigned len, unsigned flags, 1497 struct page **pagep, void **fsdata); 1498extern int afs_write_end(struct file *file, struct address_space *mapping, 1499 loff_t pos, unsigned len, unsigned copied, 1500 struct page *page, void *fsdata); 1501extern int afs_writepage(struct page *, struct writeback_control *); 1502extern int afs_writepages(struct address_space *, struct writeback_control *); 1503extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); 1504extern int afs_fsync(struct file *, loff_t, loff_t, int); 1505extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); 1506extern void afs_prune_wb_keys(struct afs_vnode *); 1507extern int afs_launder_page(struct page *); 1508 1509/* 1510 * xattr.c 1511 */ 1512extern const struct xattr_handler *afs_xattr_handlers[]; 1513 1514/* 1515 * yfsclient.c 1516 */ 1517extern void yfs_fs_fetch_data(struct afs_operation *); 1518extern void yfs_fs_create_file(struct afs_operation *); 1519extern void yfs_fs_make_dir(struct afs_operation *); 1520extern void yfs_fs_remove_file2(struct afs_operation *); 1521extern void yfs_fs_remove_file(struct afs_operation *); 1522extern void yfs_fs_remove_dir(struct afs_operation *); 1523extern void yfs_fs_link(struct afs_operation *); 1524extern void yfs_fs_symlink(struct afs_operation *); 1525extern void yfs_fs_rename(struct afs_operation *); 1526extern void yfs_fs_store_data(struct afs_operation *); 1527extern void yfs_fs_setattr(struct afs_operation *); 1528extern void yfs_fs_get_volume_status(struct afs_operation *); 1529extern void yfs_fs_set_lock(struct afs_operation *); 1530extern void yfs_fs_extend_lock(struct afs_operation *); 1531extern void yfs_fs_release_lock(struct afs_operation *); 1532extern void yfs_fs_fetch_status(struct afs_operation *); 1533extern void yfs_fs_inline_bulk_status(struct afs_operation *); 1534 1535struct yfs_acl { 1536 struct afs_acl *acl; /* Dir/file/symlink ACL */ 1537 struct afs_acl *vol_acl; /* Whole volume ACL */ 1538 u32 inherit_flag; /* True if ACL is inherited from parent dir */ 1539 u32 num_cleaned; /* Number of ACEs removed due to subject removal */ 1540 unsigned int flags; 1541#define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ 1542#define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ 1543}; 1544 1545extern void yfs_free_opaque_acl(struct yfs_acl *); 1546extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); 1547extern void yfs_fs_store_opaque_acl2(struct afs_operation *); 1548 1549/* 1550 * Miscellaneous inline functions. 1551 */ 1552static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 1553{ 1554 return container_of(inode, struct afs_vnode, vfs_inode); 1555} 1556 1557static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 1558{ 1559 return &vnode->vfs_inode; 1560} 1561 1562/* 1563 * Note that a dentry got changed. We need to set d_fsdata to the data version 1564 * number derived from the result of the operation. It doesn't matter if 1565 * d_fsdata goes backwards as we'll just revalidate. 1566 */ 1567static inline void afs_update_dentry_version(struct afs_operation *op, 1568 struct afs_vnode_param *dir_vp, 1569 struct dentry *dentry) 1570{ 1571 if (!op->error) 1572 dentry->d_fsdata = 1573 (void *)(unsigned long)dir_vp->scb.status.data_version; 1574} 1575 1576/* 1577 * Set the file size and block count. Estimate the number of 512 bytes blocks 1578 * used, rounded up to nearest 1K for consistency with other AFS clients. 1579 */ 1580static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size) 1581{ 1582 i_size_write(&vnode->vfs_inode, size); 1583 vnode->vfs_inode.i_blocks = ((size + 1023) >> 10) << 1; 1584} 1585 1586/* 1587 * Check for a conflicting operation on a directory that we just unlinked from. 1588 * If someone managed to sneak a link or an unlink in on the file we just 1589 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). 1590 */ 1591static inline void afs_check_dir_conflict(struct afs_operation *op, 1592 struct afs_vnode_param *dvp) 1593{ 1594 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) 1595 op->flags |= AFS_OPERATION_DIR_CONFLICT; 1596} 1597 1598static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) 1599{ 1600 trace_afs_io_error(call->debug_id, -EIO, where); 1601 return -EIO; 1602} 1603 1604static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) 1605{ 1606 trace_afs_file_error(vnode, -EIO, where); 1607 return -EIO; 1608} 1609 1610/*****************************************************************************/ 1611/* 1612 * debug tracing 1613 */ 1614extern unsigned afs_debug; 1615 1616#define dbgprintk(FMT,...) \ 1617 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1618 1619#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1620#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1621#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1622 1623 1624#if defined(__KDEBUG) 1625#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1626#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1627#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1628 1629#elif defined(CONFIG_AFS_DEBUG) 1630#define AFS_DEBUG_KENTER 0x01 1631#define AFS_DEBUG_KLEAVE 0x02 1632#define AFS_DEBUG_KDEBUG 0x04 1633 1634#define _enter(FMT,...) \ 1635do { \ 1636 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 1637 kenter(FMT,##__VA_ARGS__); \ 1638} while (0) 1639 1640#define _leave(FMT,...) \ 1641do { \ 1642 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 1643 kleave(FMT,##__VA_ARGS__); \ 1644} while (0) 1645 1646#define _debug(FMT,...) \ 1647do { \ 1648 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 1649 kdebug(FMT,##__VA_ARGS__); \ 1650} while (0) 1651 1652#else 1653#define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1654#define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1655#define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1656#endif 1657 1658/* 1659 * debug assertion checking 1660 */ 1661#if 1 // defined(__KDEBUGALL) 1662 1663#define ASSERT(X) \ 1664do { \ 1665 if (unlikely(!(X))) { \ 1666 printk(KERN_ERR "\n"); \ 1667 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1668 BUG(); \ 1669 } \ 1670} while(0) 1671 1672#define ASSERTCMP(X, OP, Y) \ 1673do { \ 1674 if (unlikely(!((X) OP (Y)))) { \ 1675 printk(KERN_ERR "\n"); \ 1676 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1677 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1678 (unsigned long)(X), (unsigned long)(Y)); \ 1679 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1680 (unsigned long)(X), (unsigned long)(Y)); \ 1681 BUG(); \ 1682 } \ 1683} while(0) 1684 1685#define ASSERTRANGE(L, OP1, N, OP2, H) \ 1686do { \ 1687 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 1688 printk(KERN_ERR "\n"); \ 1689 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1690 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 1691 (unsigned long)(L), (unsigned long)(N), \ 1692 (unsigned long)(H)); \ 1693 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 1694 (unsigned long)(L), (unsigned long)(N), \ 1695 (unsigned long)(H)); \ 1696 BUG(); \ 1697 } \ 1698} while(0) 1699 1700#define ASSERTIF(C, X) \ 1701do { \ 1702 if (unlikely((C) && !(X))) { \ 1703 printk(KERN_ERR "\n"); \ 1704 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1705 BUG(); \ 1706 } \ 1707} while(0) 1708 1709#define ASSERTIFCMP(C, X, OP, Y) \ 1710do { \ 1711 if (unlikely((C) && !((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#else 1723 1724#define ASSERT(X) \ 1725do { \ 1726} while(0) 1727 1728#define ASSERTCMP(X, OP, Y) \ 1729do { \ 1730} while(0) 1731 1732#define ASSERTRANGE(L, OP1, N, OP2, H) \ 1733do { \ 1734} while(0) 1735 1736#define ASSERTIF(C, X) \ 1737do { \ 1738} while(0) 1739 1740#define ASSERTIFCMP(C, X, OP, Y) \ 1741do { \ 1742} while(0) 1743 1744#endif /* __KDEBUGALL */ 1745