FILE
internal.h
File preview with syntax highlighting.
linux-6.19.14/fs/afs/internal.h
1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2/* internal AFS stuff 3 * 4 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 */ 7 8#include <linux/compiler.h> 9#include <linux/kernel.h> 10#include <linux/ktime.h> 11#include <linux/fs.h> 12#include <linux/filelock.h> 13#include <linux/pagemap.h> 14#include <linux/rxrpc.h> 15#include <linux/key.h> 16#include <linux/workqueue.h> 17#include <linux/sched.h> 18#include <linux/fscache.h> 19#include <linux/backing-dev.h> 20#include <linux/uuid.h> 21#include <linux/mm_types.h> 22#include <linux/dns_resolver.h> 23#include <crypto/krb5.h> 24#include <net/net_namespace.h> 25#include <net/netns/generic.h> 26#include <net/sock.h> 27#include <net/af_rxrpc.h> 28 29#include "afs.h" 30#include "afs_vl.h" 31 32#define AFS_CELL_MAX_ADDRS 15 33 34struct pagevec; 35struct afs_call; 36struct afs_vnode; 37struct afs_server_probe; 38 39/* 40 * Partial file-locking emulation mode. (The problem being that AFS3 only 41 * allows whole-file locks and no upgrading/downgrading). 42 */ 43enum afs_flock_mode { 44 afs_flock_mode_unset, 45 afs_flock_mode_local, /* Local locking only */ 46 afs_flock_mode_openafs, /* Don't get server lock for a partial lock */ 47 afs_flock_mode_strict, /* Always get a server lock for a partial lock */ 48 afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */ 49}; 50 51struct afs_fs_context { 52 bool force; /* T to force cell type */ 53 bool autocell; /* T if set auto mount operation */ 54 bool dyn_root; /* T if dynamic root */ 55 bool no_cell; /* T if the source is "none" (for dynroot) */ 56 enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */ 57 afs_voltype_t type; /* type of volume requested */ 58 unsigned int volnamesz; /* size of volume name */ 59 const char *volname; /* name of volume to mount */ 60 struct afs_net *net; /* the AFS net namespace stuff */ 61 struct afs_cell *cell; /* cell in which to find volume */ 62 struct afs_volume *volume; /* volume record */ 63 struct key *key; /* key to use for secure mounting */ 64}; 65 66enum afs_call_state { 67 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ 68 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ 69 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ 70 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ 71 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ 72 AFS_CALL_SV_REPLYING, /* Server: Replying */ 73 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ 74 AFS_CALL_COMPLETE, /* Completed or failed */ 75}; 76 77/* 78 * Address preferences. 79 */ 80struct afs_addr_preference { 81 union { 82 struct in_addr ipv4_addr; /* AF_INET address to compare against */ 83 struct in6_addr ipv6_addr; /* AF_INET6 address to compare against */ 84 }; 85 sa_family_t family; /* Which address to use */ 86 u16 prio; /* Priority */ 87 u8 subnet_mask; /* How many bits to compare */ 88}; 89 90struct afs_addr_preference_list { 91 struct rcu_head rcu; 92 u16 version; /* Incremented when prefs list changes */ 93 u8 ipv6_off; /* Offset of IPv6 addresses */ 94 u8 nr; /* Number of addresses in total */ 95 u8 max_prefs; /* Number of prefs allocated */ 96 struct afs_addr_preference prefs[] __counted_by(max_prefs); 97}; 98 99struct afs_address { 100 struct rxrpc_peer *peer; 101 short last_error; /* Last error from this address */ 102 u16 prio; /* Address priority */ 103}; 104 105/* 106 * List of server addresses. 107 */ 108struct afs_addr_list { 109 struct rcu_head rcu; 110 refcount_t usage; 111 u32 version; /* Version */ 112 unsigned int debug_id; 113 unsigned int addr_pref_version; /* Version of address preference list */ 114 unsigned char max_addrs; 115 unsigned char nr_addrs; 116 unsigned char preferred; /* Preferred address */ 117 unsigned char nr_ipv4; /* Number of IPv4 addresses */ 118 enum dns_record_source source:8; 119 enum dns_lookup_status status:8; 120 unsigned long probe_failed; /* Mask of addrs that failed locally/ICMP */ 121 unsigned long responded; /* Mask of addrs that responded */ 122 struct afs_address addrs[] __counted_by(max_addrs); 123#define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8)) 124}; 125 126/* 127 * a record of an in-progress RxRPC call 128 */ 129struct afs_call { 130 const struct afs_call_type *type; /* type of call */ 131 wait_queue_head_t waitq; /* processes awaiting completion */ 132 struct work_struct async_work; /* async I/O processor */ 133 struct work_struct work; /* actual work processor */ 134 struct work_struct free_work; /* Deferred free processor */ 135 struct rxrpc_call *rxcall; /* RxRPC call handle */ 136 struct rxrpc_peer *peer; /* Remote endpoint */ 137 struct key *key; /* security for this call */ 138 struct afs_net *net; /* The network namespace */ 139 struct afs_server *server; /* The fileserver record if fs op (pins ref) */ 140 struct afs_vlserver *vlserver; /* The vlserver record if vl op */ 141 void *request; /* request data (first part) */ 142 size_t iov_len; /* Size of *iter to be used */ 143 struct iov_iter def_iter; /* Default buffer/data iterator */ 144 struct iov_iter *write_iter; /* Iterator defining write to be made */ 145 struct iov_iter *iter; /* Iterator currently in use */ 146 union { /* Convenience for ->def_iter */ 147 struct kvec kvec[1]; 148 struct bio_vec bvec[1]; 149 }; 150 void *buffer; /* reply receive buffer */ 151 union { 152 struct afs_endpoint_state *probe; 153 struct afs_addr_list *vl_probe; 154 struct afs_addr_list *ret_alist; 155 struct afs_vldb_entry *ret_vldb; 156 char *ret_str; 157 }; 158 struct afs_fid fid; /* Primary vnode ID (or all zeroes) */ 159 unsigned char probe_index; /* Address in ->probe_alist */ 160 struct afs_operation *op; 161 unsigned int server_index; 162 refcount_t ref; 163 enum afs_call_state state; 164 spinlock_t state_lock; 165 int error; /* error code */ 166 u32 abort_code; /* Remote abort ID or 0 */ 167 unsigned long long remaining; /* How much is left to receive */ 168 unsigned int max_lifespan; /* Maximum lifespan in secs to set if not 0 */ 169 unsigned request_size; /* size of request data */ 170 unsigned reply_max; /* maximum size of reply */ 171 unsigned count2; /* count used in unmarshalling */ 172 unsigned char unmarshall; /* unmarshalling phase */ 173 bool drop_ref; /* T if need to drop ref for incoming call */ 174 bool need_attention; /* T if RxRPC poked us */ 175 bool async; /* T if asynchronous */ 176 bool upgrade; /* T to request service upgrade */ 177 bool intr; /* T if interruptible */ 178 bool unmarshalling_error; /* T if an unmarshalling error occurred */ 179 bool responded; /* Got a response from the call (may be abort) */ 180 u8 security_ix; /* Security class */ 181 u16 service_id; /* Actual service ID (after upgrade) */ 182 unsigned int debug_id; /* Trace ID */ 183 u32 enctype; /* Security encoding type */ 184 u32 operation_ID; /* operation ID for an incoming call */ 185 u32 count; /* count for use in unmarshalling */ 186 union { /* place to extract temporary data */ 187 struct { 188 __be32 tmp_u; 189 __be32 tmp; 190 } __attribute__((packed)); 191 __be64 tmp64; 192 }; 193 ktime_t issue_time; /* Time of issue of operation */ 194}; 195 196struct afs_call_type { 197 const char *name; 198 unsigned int op; /* Really enum afs_fs_operation */ 199 200 /* deliver request or reply data to an call 201 * - returning an error will cause the call to be aborted 202 */ 203 int (*deliver)(struct afs_call *call); 204 205 /* clean up a call */ 206 void (*destructor)(struct afs_call *call); 207 208 /* Async receive processing function */ 209 void (*async_rx)(struct work_struct *work); 210 211 /* Work function */ 212 void (*work)(struct work_struct *work); 213 214 /* Call done function (gets called immediately on success or failure) */ 215 void (*done)(struct afs_call *call); 216 217 /* Handle a call being immediately cancelled. */ 218 void (*immediate_cancel)(struct afs_call *call); 219}; 220 221/* 222 * Key available for writeback on a file. 223 */ 224struct afs_wb_key { 225 refcount_t usage; 226 struct key *key; 227 struct list_head vnode_link; /* Link in vnode->wb_keys */ 228}; 229 230/* 231 * AFS open file information record. Pointed to by file->private_data. 232 */ 233struct afs_file { 234 struct key *key; /* The key this file was opened with */ 235 struct afs_wb_key *wb; /* Writeback key record for this file */ 236}; 237 238static inline struct key *afs_file_key(struct file *file) 239{ 240 struct afs_file *af = file->private_data; 241 242 return af->key; 243} 244 245/* 246 * AFS superblock private data 247 * - there's one superblock per volume 248 */ 249struct afs_super_info { 250 struct net *net_ns; /* Network namespace */ 251 struct afs_cell *cell; /* The cell in which the volume resides */ 252 struct afs_volume *volume; /* volume record */ 253 enum afs_flock_mode flock_mode:8; /* File locking emulation mode */ 254 bool dyn_root; /* True if dynamic root */ 255}; 256 257static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) 258{ 259 return sb->s_fs_info; 260} 261 262extern struct file_system_type afs_fs_type; 263 264/* 265 * Set of substitutes for @sys. 266 */ 267struct afs_sysnames { 268#define AFS_NR_SYSNAME 16 269 char *subs[AFS_NR_SYSNAME]; 270 refcount_t usage; 271 unsigned short nr; 272 char blank[1]; 273}; 274 275/* 276 * AFS network namespace record. 277 */ 278struct afs_net { 279 struct net *net; /* Backpointer to the owning net namespace */ 280 struct afs_uuid uuid; 281 bool live; /* F if this namespace is being removed */ 282 283 /* AF_RXRPC I/O stuff */ 284 struct socket *socket; 285 struct afs_call *spare_incoming_call; 286 struct work_struct charge_preallocation_work; 287 struct work_struct rx_oob_work; 288 struct mutex socket_mutex; 289 atomic_t nr_outstanding_calls; 290 atomic_t nr_superblocks; 291 292 /* Cell database */ 293 struct rb_root cells; 294 struct idr cells_dyn_ino; /* cell->dynroot_ino mapping */ 295 struct afs_cell __rcu *ws_cell; 296 atomic_t cells_outstanding; 297 struct rw_semaphore cells_lock; 298 struct mutex cells_alias_lock; 299 300 struct mutex proc_cells_lock; 301 struct hlist_head proc_cells; 302 303 /* Known servers. Theoretically each fileserver can only be in one 304 * cell, but in practice, people create aliases and subsets and there's 305 * no easy way to distinguish them. 306 */ 307 seqlock_t fs_lock; /* For fs_probe_*, fs_proc */ 308 struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */ 309 struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */ 310 struct hlist_head fs_proc; /* procfs servers list */ 311 312 struct key *fs_cm_token_key; /* Key for creating CM tokens */ 313 struct work_struct fs_prober; 314 struct timer_list fs_probe_timer; 315 atomic_t servers_outstanding; 316 317 /* File locking renewal management */ 318 struct mutex lock_manager_mutex; 319 320 /* Misc */ 321 struct super_block *dynroot_sb; /* Dynamic root mount superblock */ 322 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ 323 struct afs_sysnames *sysnames; 324 rwlock_t sysnames_lock; 325 struct afs_addr_preference_list __rcu *address_prefs; 326 u16 address_pref_version; 327 328 /* Statistics counters */ 329 atomic_t n_lookup; /* Number of lookups done */ 330 atomic_t n_reval; /* Number of dentries needing revalidation */ 331 atomic_t n_inval; /* Number of invalidations by the server */ 332 atomic_t n_relpg; /* Number of invalidations by release_folio */ 333 atomic_t n_read_dir; /* Number of directory pages read */ 334 atomic_t n_dir_cr; /* Number of directory entry creation edits */ 335 atomic_t n_dir_rm; /* Number of directory entry removal edits */ 336 atomic_t n_stores; /* Number of store ops */ 337 atomic_long_t n_store_bytes; /* Number of bytes stored */ 338 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ 339 atomic_t n_fetches; /* Number of data fetch ops */ 340}; 341 342extern const char afs_init_sysname[]; 343 344enum afs_cell_state { 345 AFS_CELL_SETTING_UP, 346 AFS_CELL_UNLOOKED, 347 AFS_CELL_ACTIVE, 348 AFS_CELL_REMOVING, 349 AFS_CELL_DEAD, 350}; 351 352/* 353 * AFS cell record. 354 * 355 * This is a tricky concept to get right as it is possible to create aliases 356 * simply by pointing AFSDB/SRV records for two names at the same set of VL 357 * servers; it is also possible to do things like setting up two sets of VL 358 * servers, one of which provides a superset of the volumes provided by the 359 * other (for internal/external division, for example). 360 * 361 * Cells only exist in the sense that (a) a cell's name maps to a set of VL 362 * servers and (b) a cell's name is used by the client to select the key to use 363 * for authentication and encryption. The cell name is not typically used in 364 * the protocol. 365 * 366 * Two cells are determined to be aliases if they have an explicit alias (YFS 367 * only), share any VL servers in common or have at least one volume in common. 368 * "In common" means that the address list of the VL servers or the fileservers 369 * share at least one endpoint. 370 */ 371struct afs_cell { 372 union { 373 struct rcu_head rcu; 374 struct rb_node net_node; /* Node in net->cells */ 375 }; 376 struct afs_net *net; 377 struct afs_cell *alias_of; /* The cell this is an alias of */ 378 struct afs_volume *root_volume; /* The root.cell volume if there is one */ 379 struct key *anonymous_key; /* anonymous user key for this cell */ 380 struct work_struct destroyer; /* Destroyer for cell */ 381 struct work_struct manager; /* Manager for init/deinit/dns */ 382 struct timer_list management_timer; /* General management timer */ 383 struct hlist_node proc_link; /* /proc cell list link */ 384 time64_t dns_expiry; /* Time AFSDB/SRV record expires */ 385 time64_t last_inactive; /* Time of last drop of usage count */ 386 refcount_t ref; /* Struct refcount */ 387 atomic_t active; /* Active usage counter */ 388 unsigned long flags; 389#define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */ 390#define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */ 391#define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */ 392 enum afs_cell_state state; 393 short error; 394 enum dns_record_source dns_source:8; /* Latest source of data from lookup */ 395 enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */ 396 unsigned int dns_lookup_count; /* Counter of DNS lookups */ 397 unsigned int debug_id; 398 unsigned int dynroot_ino; /* Inode numbers for dynroot (a pair) */ 399 400 /* The volumes belonging to this cell */ 401 struct rw_semaphore vs_lock; /* Lock for server->volumes */ 402 struct rb_root volumes; /* Tree of volumes on this server */ 403 struct hlist_head proc_volumes; /* procfs volume list */ 404 seqlock_t volume_lock; /* For volumes */ 405 406 /* Active fileserver interaction state. */ 407 struct rb_root fs_servers; /* afs_server (by server UUID) */ 408 struct rw_semaphore fs_lock; /* For fs_servers */ 409 410 /* VL server list. */ 411 rwlock_t vl_servers_lock; /* Lock on vl_servers */ 412 struct afs_vlserver_list __rcu *vl_servers; 413 414 u8 name_len; /* Length of name */ 415 char *name; /* Cell name, case-flattened and NUL-padded */ 416 char *key_desc; /* Authentication key description */ 417}; 418 419/* 420 * Volume Location server record. 421 */ 422struct afs_vlserver { 423 struct rcu_head rcu; 424 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */ 425 unsigned long flags; 426#define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ 427#define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ 428#define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ 429#define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */ 430 rwlock_t lock; /* Lock on addresses */ 431 refcount_t ref; 432 unsigned int rtt; /* Server's current RTT in uS */ 433 unsigned int debug_id; 434 435 /* Probe state */ 436 wait_queue_head_t probe_wq; 437 atomic_t probe_outstanding; 438 spinlock_t probe_lock; 439 struct { 440 unsigned int rtt; /* Best RTT in uS (or UINT_MAX) */ 441 u32 abort_code; 442 short error; 443 unsigned short flags; 444#define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */ 445#define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */ 446#define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */ 447#define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */ 448 } probe; 449 450 u16 service_id; /* Service ID we're using */ 451 u16 port; 452 u16 name_len; /* Length of name */ 453 char name[]; /* Server name, case-flattened */ 454}; 455 456/* 457 * Weighted list of Volume Location servers. 458 */ 459struct afs_vlserver_entry { 460 u16 priority; /* Preference (as SRV) */ 461 u16 weight; /* Weight (as SRV) */ 462 enum dns_record_source source:8; 463 enum dns_lookup_status status:8; 464 struct afs_vlserver *server; 465}; 466 467struct afs_vlserver_list { 468 struct rcu_head rcu; 469 refcount_t ref; 470 u8 nr_servers; 471 u8 index; /* Server currently in use */ 472 u8 preferred; /* Preferred server */ 473 enum dns_record_source source:8; 474 enum dns_lookup_status status:8; 475 rwlock_t lock; 476 struct afs_vlserver_entry servers[]; 477}; 478 479/* 480 * Cached VLDB entry. 481 * 482 * This is pointed to by cell->vldb_entries, indexed by name. 483 */ 484struct afs_vldb_entry { 485 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ 486 487 unsigned long flags; 488#define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ 489#define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ 490#define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ 491#define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ 492#define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ 493 494 uuid_t fs_server[AFS_NMAXNSERVERS]; 495 u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */ 496 u8 fs_mask[AFS_NMAXNSERVERS]; 497#define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ 498#define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ 499#define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ 500 u8 vlsf_flags[AFS_NMAXNSERVERS]; 501 short error; 502 u8 nr_servers; /* Number of server records */ 503 u8 name_len; 504 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 505}; 506 507/* 508 * Fileserver endpoint state. The records the addresses of a fileserver's 509 * endpoints and the state and result of a round of probing on them. This 510 * allows the rotation algorithm to access those results without them being 511 * erased by a subsequent round of probing. 512 */ 513struct afs_endpoint_state { 514 struct rcu_head rcu; 515 struct afs_addr_list *addresses; /* The addresses being probed */ 516 unsigned long responsive_set; /* Bitset of responsive endpoints */ 517 unsigned long failed_set; /* Bitset of endpoints we failed to probe */ 518 refcount_t ref; 519 unsigned int server_id; /* Debug ID of server */ 520 unsigned int probe_seq; /* Probe sequence (from server::probe_counter) */ 521 atomic_t nr_probing; /* Number of outstanding probes */ 522 unsigned int rtt; /* Best RTT in uS (or UINT_MAX) */ 523 s32 abort_code; 524 short error; 525 unsigned long flags; 526#define AFS_ESTATE_RESPONDED 0 /* Set if the server responded */ 527#define AFS_ESTATE_SUPERSEDED 1 /* Set if this record has been superseded */ 528#define AFS_ESTATE_IS_YFS 2 /* Set if probe upgraded to YFS */ 529#define AFS_ESTATE_NOT_YFS 3 /* Set if probe didn't upgrade to YFS */ 530#define AFS_ESTATE_LOCAL_FAILURE 4 /* Set if there was a local failure (eg. ENOMEM) */ 531}; 532 533/* 534 * Record of fileserver with which we're actively communicating. 535 */ 536struct afs_server { 537 struct rcu_head rcu; 538 union { 539 uuid_t uuid; /* Server ID */ 540 struct afs_uuid _uuid; 541 }; 542 543 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 544 struct rb_node uuid_rb; /* Link in cell->fs_servers */ 545 struct list_head probe_link; /* Link in net->fs_probe_* */ 546 struct hlist_node proc_link; /* Link in net->fs_proc */ 547 struct list_head volumes; /* RCU list of afs_server_entry objects */ 548 struct work_struct destroyer; /* Work item to try and destroy a server */ 549 struct timer_list timer; /* Management timer */ 550 struct mutex cm_token_lock; /* Lock governing creation of appdata */ 551 struct krb5_buffer cm_rxgk_appdata; /* Appdata to be included in RESPONSE packet */ 552 time64_t unuse_time; /* Time at which last unused */ 553 unsigned long flags; 554#define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */ 555#define AFS_SERVER_FL_UPDATING 1 556#define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */ 557#define AFS_SERVER_FL_UNCREATED 3 /* The record needs creating */ 558#define AFS_SERVER_FL_CREATING 4 /* The record is being created */ 559#define AFS_SERVER_FL_EXPIRED 5 /* The record has expired */ 560#define AFS_SERVER_FL_NOT_FOUND 6 /* VL server says no such server */ 561#define AFS_SERVER_FL_VL_FAIL 7 /* Failed to access VL server */ 562#define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ 563#define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */ 564#define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */ 565#define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */ 566#define AFS_SERVER_FL_HAS_FS64 19 /* Fileserver supports FS.{Fetch,Store}Data64 */ 567#define AFS_SERVER_FL_NO_RENAME2 20 /* YFS Fileserver doesn't support enhanced rename */ 568 refcount_t ref; /* Object refcount */ 569 atomic_t active; /* Active user count */ 570 u32 addr_version; /* Address list version */ 571 u16 service_id; /* Service ID we're using. */ 572 short create_error; /* Creation error */ 573 unsigned int rtt; /* Server's current RTT in uS */ 574 unsigned int debug_id; /* Debugging ID for traces */ 575 576 /* file service access */ 577 rwlock_t fs_lock; /* access lock */ 578 579 /* Probe state */ 580 struct afs_endpoint_state __rcu *endpoint_state; /* Latest endpoint/probe state */ 581 unsigned long probed_at; /* Time last probe was dispatched (jiffies) */ 582 wait_queue_head_t probe_wq; 583 unsigned int probe_counter; /* Number of probes issued */ 584 spinlock_t probe_lock; 585}; 586 587enum afs_ro_replicating { 588 AFS_RO_NOT_REPLICATING, /* Not doing replication */ 589 AFS_RO_REPLICATING_USE_OLD, /* Replicating; use old version */ 590 AFS_RO_REPLICATING_USE_NEW, /* Replicating; switch to new version */ 591} __mode(byte); 592 593/* 594 * Replaceable volume server list. 595 */ 596struct afs_server_entry { 597 struct afs_server *server; 598 struct afs_volume *volume; 599 struct list_head slink; /* Link in server->volumes */ 600 time64_t cb_expires_at; /* Time at which volume-level callback expires */ 601 unsigned long flags; 602#define AFS_SE_EXCLUDED 0 /* Set if server is to be excluded in rotation */ 603#define AFS_SE_VOLUME_OFFLINE 1 /* Set if volume offline notice given */ 604#define AFS_SE_VOLUME_BUSY 2 /* Set if volume busy notice given */ 605}; 606 607struct afs_server_list { 608 struct rcu_head rcu; 609 refcount_t usage; 610 bool attached; /* T if attached to servers */ 611 enum afs_ro_replicating ro_replicating; /* RW->RO update (probably) in progress */ 612 unsigned char nr_servers; 613 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ 614 unsigned int seq; /* Set to ->servers_seq when installed */ 615 rwlock_t lock; 616 struct afs_server_entry servers[]; 617}; 618 619/* 620 * Live AFS volume management. 621 */ 622struct afs_volume { 623 struct rcu_head rcu; 624 afs_volid_t vid; /* The volume ID of this volume */ 625 afs_volid_t vids[AFS_MAXTYPES]; /* All associated volume IDs */ 626 refcount_t ref; 627 unsigned int debug_id; /* Debugging ID for traces */ 628 time64_t update_at; /* Time at which to next update */ 629 struct afs_cell *cell; /* Cell to which belongs (pins ref) */ 630 struct rb_node cell_node; /* Link in cell->volumes */ 631 struct hlist_node proc_link; /* Link in cell->proc_volumes */ 632 struct super_block __rcu *sb; /* Superblock on which inodes reside */ 633 struct work_struct destructor; /* Deferred destructor */ 634 unsigned long flags; 635#define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ 636#define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ 637#define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ 638#define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ 639#define AFS_VOLUME_MAYBE_NO_IBULK 4 /* - T if some servers don't have InlineBulkStatus */ 640#define AFS_VOLUME_RM_TREE 5 /* - Set if volume removed from cell->volumes */ 641#ifdef CONFIG_AFS_FSCACHE 642 struct fscache_volume *cache; /* Caching cookie */ 643#endif 644 struct afs_server_list __rcu *servers; /* List of servers on which volume resides */ 645 rwlock_t servers_lock; /* Lock for ->servers */ 646 unsigned int servers_seq; /* Incremented each time ->servers changes */ 647 648 /* RO release tracking */ 649 struct mutex volsync_lock; /* Time/state evaluation lock */ 650 time64_t creation_time; /* Volume creation time (or TIME64_MIN) */ 651 time64_t update_time; /* Volume update time (or TIME64_MIN) */ 652 653 /* Callback management */ 654 struct mutex cb_check_lock; /* Lock to control race to check after v_break */ 655 time64_t cb_expires_at; /* Earliest volume callback expiry time */ 656 atomic_t cb_ro_snapshot; /* RO volume update-from-snapshot counter */ 657 atomic_t cb_v_break; /* Volume-break event counter. */ 658 atomic_t cb_v_check; /* Volume-break has-been-checked counter. */ 659 atomic_t cb_scrub; /* Scrub-all-data event counter. */ 660 rwlock_t cb_v_break_lock; 661 struct rw_semaphore open_mmaps_lock; 662 struct list_head open_mmaps; /* List of vnodes that are mmapped */ 663 664 afs_voltype_t type; /* type of volume */ 665 char type_force; /* force volume type (suppress R/O -> R/W) */ 666 u8 name_len; 667 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ 668}; 669 670enum afs_lock_state { 671 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ 672 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ 673 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ 674 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ 675 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ 676 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ 677 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ 678 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */ 679}; 680 681/* 682 * AFS inode private data. 683 * 684 * Note that afs_alloc_inode() *must* reset anything that could incorrectly 685 * leak from one inode to another. 686 */ 687struct afs_vnode { 688 struct netfs_inode netfs; /* Netfslib context and vfs inode */ 689 struct afs_volume *volume; /* volume on which vnode resides */ 690 struct afs_fid fid; /* the file identifier for this inode */ 691 struct afs_file_status status; /* AFS status info for this file */ 692 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ 693 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ 694 struct list_head io_lock_waiters; /* Threads waiting for the I/O lock */ 695 struct rw_semaphore validate_lock; /* lock for validating this vnode */ 696 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ 697 struct key *silly_key; /* Silly rename key */ 698 spinlock_t wb_lock; /* lock for wb_keys */ 699 spinlock_t lock; /* waitqueue/flags lock */ 700 unsigned long flags; 701#define AFS_VNODE_IO_LOCK 0 /* Set if the I/O serialisation lock is held */ 702#define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ 703#define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ 704#define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ 705#define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ 706#define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ 707#define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ 708#define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ 709#define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */ 710#define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */ 711#define AFS_VNODE_DIR_READ 11 /* Set if we've read a dir's contents */ 712 713 struct folio_queue *directory; /* Directory contents */ 714 struct list_head wb_keys; /* List of keys available for writeback */ 715 struct list_head pending_locks; /* locks waiting to be granted */ 716 struct list_head granted_locks; /* locks granted on this file */ 717 struct delayed_work lock_work; /* work to be done in locking */ 718 struct key *lock_key; /* Key to be used in lock ops */ 719 ktime_t locked_at; /* Time at which lock obtained */ 720 enum afs_lock_state lock_state : 8; 721 afs_lock_type_t lock_type : 8; 722 unsigned int directory_size; /* Amount of space in ->directory */ 723 724 /* outstanding callback notification on this file */ 725 struct work_struct cb_work; /* Work for mmap'd files */ 726 struct list_head cb_mmap_link; /* Link in cell->fs_open_mmaps */ 727 void *cb_server; /* Server with callback/filelock */ 728 atomic_t cb_nr_mmap; /* Number of mmaps */ 729 unsigned int cb_ro_snapshot; /* RO volume release counter on ->volume */ 730 unsigned int cb_scrub; /* Scrub counter on ->volume */ 731 unsigned int cb_break; /* Break counter on vnode */ 732 unsigned int cb_v_check; /* Break check counter on ->volume */ 733 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ 734 735 atomic64_t cb_expires_at; /* time at which callback expires */ 736#define AFS_NO_CB_PROMISE TIME64_MIN 737}; 738 739static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) 740{ 741#ifdef CONFIG_AFS_FSCACHE 742 return netfs_i_cookie(&vnode->netfs); 743#else 744 return NULL; 745#endif 746} 747 748static inline void afs_vnode_set_cache(struct afs_vnode *vnode, 749 struct fscache_cookie *cookie) 750{ 751#ifdef CONFIG_AFS_FSCACHE 752 vnode->netfs.cache = cookie; 753 if (cookie) 754 mapping_set_release_always(vnode->netfs.inode.i_mapping); 755#endif 756} 757 758/* 759 * cached security record for one user's attempt to access a vnode 760 */ 761struct afs_permit { 762 struct key *key; /* RxRPC ticket holding a security context */ 763 afs_access_t access; /* CallerAccess value for this key */ 764}; 765 766/* 767 * Immutable cache of CallerAccess records from attempts to access vnodes. 768 * These may be shared between multiple vnodes. 769 */ 770struct afs_permits { 771 struct rcu_head rcu; 772 struct hlist_node hash_node; /* Link in hash */ 773 unsigned long h; /* Hash value for this permit list */ 774 refcount_t usage; 775 unsigned short nr_permits; /* Number of records */ 776 bool invalidated; /* Invalidated due to key change */ 777 struct afs_permit permits[] __counted_by(nr_permits); /* List of permits sorted by key pointer */ 778}; 779 780/* 781 * Error prioritisation and accumulation. 782 */ 783struct afs_error { 784 s32 abort_code; /* Cumulative abort code */ 785 short error; /* Cumulative error */ 786 bool responded; /* T if server responded */ 787 bool aborted; /* T if ->error is from an abort */ 788}; 789 790/* 791 * Cursor for iterating over a set of volume location servers. 792 */ 793struct afs_vl_cursor { 794 struct afs_cell *cell; /* The cell we're querying */ 795 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ 796 struct afs_vlserver *server; /* Server on which this resides */ 797 struct afs_addr_list *alist; /* Current address list (pins ref) */ 798 struct key *key; /* Key for the server */ 799 unsigned long untried_servers; /* Bitmask of untried servers */ 800 unsigned long addr_tried; /* Tried addresses */ 801 struct afs_error cumul_error; /* Cumulative error */ 802 unsigned int debug_id; 803 s32 call_abort_code; 804 short call_error; /* Error from single call */ 805 short server_index; /* Current server */ 806 signed char addr_index; /* Current address */ 807 unsigned short flags; 808#define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ 809#define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ 810#define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ 811 short nr_iterations; /* Number of server iterations */ 812 bool call_responded; /* T if the current address responded */ 813}; 814 815/* 816 * Fileserver state tracking for an operation. An array of these is kept, 817 * indexed by server index. 818 */ 819struct afs_server_state { 820 /* Tracking of fileserver probe state. Other operations may interfere 821 * by probing a fileserver when accessing other volumes. 822 */ 823 unsigned int probe_seq; 824 unsigned long untried_addrs; /* Addresses we haven't tried yet */ 825 struct wait_queue_entry probe_waiter; 826 struct afs_endpoint_state *endpoint_state; /* Endpoint state being monitored */ 827}; 828 829/* 830 * Fileserver operation methods. 831 */ 832struct afs_operation_ops { 833 void (*issue_afs_rpc)(struct afs_operation *op); 834 void (*issue_yfs_rpc)(struct afs_operation *op); 835 void (*success)(struct afs_operation *op); 836 void (*aborted)(struct afs_operation *op); 837 void (*failed)(struct afs_operation *op); 838 void (*edit_dir)(struct afs_operation *op); 839 void (*put)(struct afs_operation *op); 840}; 841 842struct afs_vnode_param { 843 struct afs_vnode *vnode; 844 struct afs_fid fid; /* Fid to access */ 845 struct afs_status_cb scb; /* Returned status and callback promise */ 846 afs_dataversion_t dv_before; /* Data version before the call */ 847 unsigned int cb_break_before; /* cb_break before the call */ 848 u8 dv_delta; /* Expected change in data version */ 849 bool put_vnode:1; /* T if we have a ref on the vnode */ 850 bool need_io_lock:1; /* T if we need the I/O lock on this */ 851 bool update_ctime:1; /* Need to update the ctime */ 852 bool set_size:1; /* Must update i_size */ 853 bool op_unlinked:1; /* True if file was unlinked by op */ 854 bool speculative:1; /* T if speculative status fetch (no vnode lock) */ 855 bool modification:1; /* Set if the content gets modified */ 856}; 857 858/* 859 * Fileserver operation wrapper, handling server and address rotation 860 * asynchronously. May make simultaneous calls to multiple servers. 861 */ 862struct afs_operation { 863 struct afs_net *net; /* Network namespace */ 864 struct key *key; /* Key for the cell */ 865 const struct afs_call_type *type; /* Type of call done */ 866 const struct afs_operation_ops *ops; 867 868 /* Parameters/results for the operation */ 869 struct afs_volume *volume; /* Volume being accessed */ 870 struct afs_vnode_param file[2]; 871 struct afs_vnode_param *more_files; 872 struct afs_volsync pre_volsync; /* Volsync before op */ 873 struct afs_volsync volsync; /* Volsync returned by op */ 874 struct dentry *dentry; /* Dentry to be altered */ 875 struct dentry *dentry_2; /* Second dentry to be altered */ 876 struct timespec64 mtime; /* Modification time to record */ 877 struct timespec64 ctime; /* Change time to set */ 878 struct afs_error cumul_error; /* Cumulative error */ 879 short nr_files; /* Number of entries in file[], more_files */ 880 unsigned int debug_id; 881 882 unsigned int cb_v_break; /* Volume break counter before op */ 883 884 union { 885 struct { 886 int which; /* Which ->file[] to fetch for */ 887 } fetch_status; 888 struct { 889 int reason; /* enum afs_edit_dir_reason */ 890 mode_t mode; 891 const char *symlink; 892 } create; 893 struct { 894 bool need_rehash; 895 } unlink; 896 struct { 897 struct dentry *rehash; 898 struct dentry *tmp; 899 unsigned int rename_flags; 900 bool new_negative; 901 } rename; 902 struct { 903 struct netfs_io_subrequest *subreq; 904 } fetch; 905 struct { 906 afs_lock_type_t type; 907 } lock; 908 struct { 909 struct iov_iter *write_iter; 910 loff_t pos; 911 loff_t size; 912 loff_t i_size; 913 } store; 914 struct { 915 struct iattr *attr; 916 loff_t old_i_size; 917 } setattr; 918 struct afs_acl *acl; 919 struct yfs_acl *yacl; 920 struct { 921 struct afs_volume_status vs; 922 struct kstatfs *buf; 923 } volstatus; 924 }; 925 926 /* Fileserver iteration state */ 927 struct afs_server_list *server_list; /* Current server list (pins ref) */ 928 struct afs_server *server; /* Server we're using (ref pinned by server_list) */ 929 struct afs_endpoint_state *estate; /* Current endpoint state (doesn't pin ref) */ 930 struct afs_server_state *server_states; /* States of the servers involved */ 931 struct afs_call *call; 932 unsigned long untried_servers; /* Bitmask of untried servers */ 933 unsigned long addr_tried; /* Tried addresses */ 934 s32 call_abort_code; /* Abort code from single call */ 935 short call_error; /* Error from single call */ 936 short server_index; /* Current server */ 937 short nr_iterations; /* Number of server iterations */ 938 signed char addr_index; /* Current address */ 939 bool call_responded; /* T if the current address responded */ 940 941 unsigned int flags; 942#define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ 943#define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ 944#define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ 945#define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ 946#define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ 947#define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ 948#define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ 949#define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ 950#define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ 951#define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ 952#define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ 953#define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ 954#define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ 955#define AFS_OPERATION_ASYNC 0x2000 /* Set if should run asynchronously */ 956}; 957 958/* 959 * Cache auxiliary data. 960 */ 961struct afs_vnode_cache_aux { 962 __be64 data_version; 963} __packed; 964 965static inline void afs_set_cache_aux(struct afs_vnode *vnode, 966 struct afs_vnode_cache_aux *aux) 967{ 968 aux->data_version = cpu_to_be64(vnode->status.data_version); 969} 970 971static inline void afs_invalidate_cache(struct afs_vnode *vnode, unsigned int flags) 972{ 973 struct afs_vnode_cache_aux aux; 974 975 afs_set_cache_aux(vnode, &aux); 976 fscache_invalidate(afs_vnode_cache(vnode), &aux, 977 i_size_read(&vnode->netfs.inode), flags); 978} 979 980/* 981 * Directory iteration management. 982 */ 983struct afs_dir_iter { 984 struct afs_vnode *dvnode; 985 union afs_xdr_dir_block *block; 986 struct folio_queue *fq; 987 unsigned int fpos; 988 int fq_slot; 989 unsigned int loop_check; 990 u8 nr_slots; 991 u8 bucket; 992 unsigned int prev_entry; 993}; 994 995#include <trace/events/afs.h> 996 997/*****************************************************************************/ 998/* 999 * addr_list.c 1000 */ 1001struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist, enum afs_alist_trace reason); 1002extern struct afs_addr_list *afs_alloc_addrlist(unsigned int nr); 1003extern void afs_put_addrlist(struct afs_addr_list *alist, enum afs_alist_trace reason); 1004extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, 1005 const char *, size_t, char, 1006 unsigned short, unsigned short); 1007bool afs_addr_list_same(const struct afs_addr_list *a, 1008 const struct afs_addr_list *b); 1009extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); 1010 1011extern int afs_merge_fs_addr4(struct afs_net *net, struct afs_addr_list *addr, 1012 __be32 xdr, u16 port); 1013extern int afs_merge_fs_addr6(struct afs_net *net, struct afs_addr_list *addr, 1014 __be32 *xdr, u16 port); 1015void afs_set_peer_appdata(struct afs_server *server, 1016 struct afs_addr_list *old_alist, 1017 struct afs_addr_list *new_alist); 1018 1019/* 1020 * addr_prefs.c 1021 */ 1022int afs_proc_addr_prefs_write(struct file *file, char *buf, size_t size); 1023void afs_get_address_preferences_rcu(struct afs_net *net, struct afs_addr_list *alist); 1024void afs_get_address_preferences(struct afs_net *net, struct afs_addr_list *alist); 1025 1026/* 1027 * callback.c 1028 */ 1029extern void afs_invalidate_mmap_work(struct work_struct *); 1030extern void afs_init_callback_state(struct afs_server *); 1031extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 1032extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); 1033extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); 1034 1035static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) 1036{ 1037 return vnode->cb_break + vnode->cb_ro_snapshot + vnode->cb_scrub; 1038} 1039 1040static inline bool afs_cb_is_broken(unsigned int cb_break, 1041 const struct afs_vnode *vnode) 1042{ 1043 return cb_break != (vnode->cb_break + 1044 atomic_read(&vnode->volume->cb_ro_snapshot) + 1045 atomic_read(&vnode->volume->cb_scrub)); 1046} 1047 1048/* 1049 * cell.c 1050 */ 1051extern int afs_cell_init(struct afs_net *, const char *); 1052extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, 1053 enum afs_cell_trace); 1054enum afs_lookup_cell_for { 1055 AFS_LOOKUP_CELL_DYNROOT, 1056 AFS_LOOKUP_CELL_MOUNTPOINT, 1057 AFS_LOOKUP_CELL_DIRECT_MOUNT, 1058 AFS_LOOKUP_CELL_PRELOAD, 1059 AFS_LOOKUP_CELL_ROOTCELL, 1060 AFS_LOOKUP_CELL_ALIAS_CHECK, 1061}; 1062struct afs_cell *afs_lookup_cell(struct afs_net *net, 1063 const char *name, unsigned int namesz, 1064 const char *vllist, 1065 enum afs_lookup_cell_for reason, 1066 enum afs_cell_trace trace); 1067extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); 1068void afs_unuse_cell(struct afs_cell *cell, enum afs_cell_trace reason); 1069extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); 1070extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); 1071extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); 1072extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); 1073void afs_set_cell_timer(struct afs_cell *cell, unsigned int delay_secs); 1074extern void __net_exit afs_cell_purge(struct afs_net *); 1075 1076/* 1077 * cmservice.c 1078 */ 1079extern bool afs_cm_incoming_call(struct afs_call *); 1080 1081/* 1082 * cm_security.c 1083 */ 1084void afs_process_oob_queue(struct work_struct *work); 1085#ifdef CONFIG_RXGK 1086int afs_create_token_key(struct afs_net *net, struct socket *socket); 1087#else 1088static inline int afs_create_token_key(struct afs_net *net, struct socket *socket) 1089{ 1090 return 0; 1091} 1092#endif 1093 1094/* 1095 * dir.c 1096 */ 1097extern const struct file_operations afs_dir_file_operations; 1098extern const struct inode_operations afs_dir_inode_operations; 1099extern const struct address_space_operations afs_dir_aops; 1100extern const struct dentry_operations afs_fs_dentry_operations; 1101 1102ssize_t afs_read_single(struct afs_vnode *dvnode, struct file *file); 1103ssize_t afs_read_dir(struct afs_vnode *dvnode, struct file *file) 1104 __acquires(&dvnode->validate_lock); 1105extern void afs_d_release(struct dentry *); 1106extern void afs_check_for_remote_deletion(struct afs_operation *); 1107int afs_single_writepages(struct address_space *mapping, 1108 struct writeback_control *wbc); 1109 1110/* 1111 * dir_edit.c 1112 */ 1113extern void afs_edit_dir_add(struct afs_vnode *, const struct qstr *, struct afs_fid *, 1114 enum afs_edit_dir_reason); 1115extern void afs_edit_dir_remove(struct afs_vnode *, const struct qstr *, enum afs_edit_dir_reason); 1116void afs_edit_dir_update(struct afs_vnode *vnode, const struct qstr *name, 1117 struct afs_vnode *new_dvnode, enum afs_edit_dir_reason why); 1118void afs_mkdir_init_dir(struct afs_vnode *dvnode, struct afs_vnode *parent_vnode); 1119 1120/* 1121 * dir_search.c 1122 */ 1123unsigned int afs_dir_hash_name(const struct qstr *name); 1124bool afs_dir_init_iter(struct afs_dir_iter *iter, const struct qstr *name); 1125union afs_xdr_dir_block *afs_dir_find_block(struct afs_dir_iter *iter, size_t block); 1126int afs_dir_search_bucket(struct afs_dir_iter *iter, const struct qstr *name, 1127 struct afs_fid *_fid); 1128int afs_dir_search(struct afs_vnode *dvnode, const struct qstr *name, 1129 struct afs_fid *_fid, afs_dataversion_t *_dir_version); 1130 1131/* 1132 * dir_silly.c 1133 */ 1134extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, 1135 struct dentry *, struct key *); 1136extern int afs_silly_iput(struct dentry *, struct inode *); 1137 1138/* 1139 * dynroot.c 1140 */ 1141extern const struct inode_operations afs_dynroot_inode_operations; 1142extern const struct dentry_operations afs_dynroot_dentry_operations; 1143 1144struct inode *afs_dynroot_iget_root(struct super_block *sb); 1145 1146/* 1147 * file.c 1148 */ 1149extern const struct address_space_operations afs_file_aops; 1150extern const struct inode_operations afs_file_inode_operations; 1151extern const struct file_operations afs_file_operations; 1152extern const struct afs_operation_ops afs_fetch_data_operation; 1153extern const struct netfs_request_ops afs_req_ops; 1154 1155extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); 1156extern void afs_put_wb_key(struct afs_wb_key *); 1157extern int afs_open(struct inode *, struct file *); 1158extern int afs_release(struct inode *, struct file *); 1159void afs_fetch_data_async_rx(struct work_struct *work); 1160void afs_fetch_data_immediate_cancel(struct afs_call *call); 1161 1162/* 1163 * flock.c 1164 */ 1165extern struct workqueue_struct *afs_lock_manager; 1166 1167extern void afs_lock_op_done(struct afs_call *); 1168extern void afs_lock_work(struct work_struct *); 1169extern void afs_lock_may_be_available(struct afs_vnode *); 1170extern int afs_lock(struct file *, int, struct file_lock *); 1171extern int afs_flock(struct file *, int, struct file_lock *); 1172 1173/* 1174 * fsclient.c 1175 */ 1176extern void afs_fs_fetch_status(struct afs_operation *); 1177extern void afs_fs_fetch_data(struct afs_operation *); 1178extern void afs_fs_create_file(struct afs_operation *); 1179extern void afs_fs_make_dir(struct afs_operation *); 1180extern void afs_fs_remove_file(struct afs_operation *); 1181extern void afs_fs_remove_dir(struct afs_operation *); 1182extern void afs_fs_link(struct afs_operation *); 1183extern void afs_fs_symlink(struct afs_operation *); 1184extern void afs_fs_rename(struct afs_operation *); 1185extern void afs_fs_store_data(struct afs_operation *); 1186extern void afs_fs_setattr(struct afs_operation *); 1187extern void afs_fs_get_volume_status(struct afs_operation *); 1188extern void afs_fs_set_lock(struct afs_operation *); 1189extern void afs_fs_extend_lock(struct afs_operation *); 1190extern void afs_fs_release_lock(struct afs_operation *); 1191int afs_fs_give_up_all_callbacks(struct afs_net *net, struct afs_server *server, 1192 struct afs_address *addr, struct key *key); 1193bool afs_fs_get_capabilities(struct afs_net *net, struct afs_server *server, 1194 struct afs_endpoint_state *estate, unsigned int addr_index, 1195 struct key *key); 1196extern void afs_fs_inline_bulk_status(struct afs_operation *); 1197 1198struct afs_acl { 1199 u32 size; 1200 u8 data[] __counted_by(size); 1201}; 1202 1203extern void afs_fs_fetch_acl(struct afs_operation *); 1204extern void afs_fs_store_acl(struct afs_operation *); 1205 1206/* 1207 * fs_operation.c 1208 */ 1209extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); 1210extern int afs_put_operation(struct afs_operation *); 1211extern bool afs_begin_vnode_operation(struct afs_operation *); 1212extern void afs_end_vnode_operation(struct afs_operation *op); 1213extern void afs_wait_for_operation(struct afs_operation *); 1214extern int afs_do_sync_operation(struct afs_operation *); 1215 1216static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, 1217 struct afs_vnode *vnode) 1218{ 1219 op->file[n].vnode = vnode; 1220 op->file[n].need_io_lock = true; 1221} 1222 1223static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, 1224 const struct afs_fid *fid) 1225{ 1226 op->file[n].fid = *fid; 1227} 1228 1229/* 1230 * fs_probe.c 1231 */ 1232struct afs_endpoint_state *afs_get_endpoint_state(struct afs_endpoint_state *estate, 1233 enum afs_estate_trace where); 1234void afs_put_endpoint_state(struct afs_endpoint_state *estate, enum afs_estate_trace where); 1235extern void afs_fileserver_probe_result(struct afs_call *); 1236int afs_fs_probe_fileserver(struct afs_net *net, struct afs_server *server, 1237 struct afs_addr_list *new_alist, struct key *key); 1238int afs_wait_for_fs_probes(struct afs_operation *op, struct afs_server_state *states, bool intr); 1239extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); 1240extern void afs_fs_probe_dispatcher(struct work_struct *); 1241int afs_wait_for_one_fs_probe(struct afs_server *server, struct afs_endpoint_state *estate, 1242 unsigned long exclude, bool is_intr); 1243extern void afs_fs_probe_cleanup(struct afs_net *); 1244 1245/* 1246 * inode.c 1247 */ 1248extern const struct afs_operation_ops afs_fetch_status_operation; 1249 1250void afs_init_new_symlink(struct afs_vnode *vnode, struct afs_operation *op); 1251const char *afs_get_link(struct dentry *dentry, struct inode *inode, 1252 struct delayed_call *callback); 1253int afs_readlink(struct dentry *dentry, char __user *buffer, int buflen); 1254extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); 1255extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); 1256extern int afs_ilookup5_test_by_fid(struct inode *, void *); 1257extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); 1258extern struct inode *afs_root_iget(struct super_block *, struct key *); 1259extern int afs_getattr(struct mnt_idmap *idmap, const struct path *, 1260 struct kstat *, u32, unsigned int); 1261extern int afs_setattr(struct mnt_idmap *idmap, struct dentry *, struct iattr *); 1262extern void afs_evict_inode(struct inode *); 1263extern int afs_drop_inode(struct inode *); 1264 1265/* 1266 * main.c 1267 */ 1268extern struct workqueue_struct *afs_wq; 1269extern int afs_net_id; 1270 1271static inline struct afs_net *afs_net(struct net *net) 1272{ 1273 return net_generic(net, afs_net_id); 1274} 1275 1276static inline struct afs_net *afs_sb2net(struct super_block *sb) 1277{ 1278 return afs_net(AFS_FS_S(sb)->net_ns); 1279} 1280 1281static inline struct afs_net *afs_d2net(struct dentry *dentry) 1282{ 1283 return afs_sb2net(dentry->d_sb); 1284} 1285 1286static inline struct afs_net *afs_i2net(struct inode *inode) 1287{ 1288 return afs_sb2net(inode->i_sb); 1289} 1290 1291static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) 1292{ 1293 return afs_i2net(&vnode->netfs.inode); 1294} 1295 1296static inline struct afs_net *afs_sock2net(struct sock *sk) 1297{ 1298 return net_generic(sock_net(sk), afs_net_id); 1299} 1300 1301static inline void __afs_stat(atomic_t *s) 1302{ 1303 atomic_inc(s); 1304} 1305 1306#define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) 1307 1308/* 1309 * misc.c 1310 */ 1311extern int afs_abort_to_error(u32); 1312extern void afs_prioritise_error(struct afs_error *, int, u32); 1313 1314static inline void afs_op_nomem(struct afs_operation *op) 1315{ 1316 op->cumul_error.error = -ENOMEM; 1317} 1318 1319static inline int afs_op_error(const struct afs_operation *op) 1320{ 1321 return op->cumul_error.error; 1322} 1323 1324static inline s32 afs_op_abort_code(const struct afs_operation *op) 1325{ 1326 return op->cumul_error.abort_code; 1327} 1328 1329static inline int afs_op_set_error(struct afs_operation *op, int error) 1330{ 1331 return op->cumul_error.error = error; 1332} 1333 1334static inline void afs_op_accumulate_error(struct afs_operation *op, int error, s32 abort_code) 1335{ 1336 afs_prioritise_error(&op->cumul_error, error, abort_code); 1337} 1338 1339/* 1340 * mntpt.c 1341 */ 1342extern const struct inode_operations afs_mntpt_inode_operations; 1343extern const struct inode_operations afs_autocell_inode_operations; 1344extern const struct file_operations afs_mntpt_file_operations; 1345 1346extern struct vfsmount *afs_d_automount(struct path *); 1347extern void afs_mntpt_kill_timer(void); 1348 1349/* 1350 * proc.c 1351 */ 1352#ifdef CONFIG_PROC_FS 1353extern int __net_init afs_proc_init(struct afs_net *); 1354extern void __net_exit afs_proc_cleanup(struct afs_net *); 1355extern int afs_proc_cell_setup(struct afs_cell *); 1356extern void afs_proc_cell_remove(struct afs_cell *); 1357extern void afs_put_sysnames(struct afs_sysnames *); 1358#else 1359static inline int afs_proc_init(struct afs_net *net) { return 0; } 1360static inline void afs_proc_cleanup(struct afs_net *net) {} 1361static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } 1362static inline void afs_proc_cell_remove(struct afs_cell *cell) {} 1363static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} 1364#endif 1365 1366/* 1367 * rotate.c 1368 */ 1369void afs_clear_server_states(struct afs_operation *op); 1370extern bool afs_select_fileserver(struct afs_operation *); 1371extern void afs_dump_edestaddrreq(const struct afs_operation *); 1372 1373/* 1374 * rxrpc.c 1375 */ 1376extern struct workqueue_struct *afs_async_calls; 1377 1378extern int __net_init afs_open_socket(struct afs_net *); 1379extern void __net_exit afs_close_socket(struct afs_net *); 1380extern void afs_charge_preallocation(struct work_struct *); 1381extern void afs_put_call(struct afs_call *); 1382void afs_deferred_put_call(struct afs_call *call); 1383void afs_make_call(struct afs_call *call, gfp_t gfp); 1384void afs_deliver_to_call(struct afs_call *call); 1385void afs_wait_for_call_to_complete(struct afs_call *call); 1386extern struct afs_call *afs_alloc_flat_call(struct afs_net *, 1387 const struct afs_call_type *, 1388 size_t, size_t); 1389extern void afs_flat_call_destructor(struct afs_call *); 1390extern void afs_send_empty_reply(struct afs_call *); 1391extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); 1392extern int afs_extract_data(struct afs_call *, bool); 1393extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); 1394 1395static inline struct afs_call *afs_get_call(struct afs_call *call, 1396 enum afs_call_trace why) 1397{ 1398 int r; 1399 1400 __refcount_inc(&call->ref, &r); 1401 1402 trace_afs_call(call->debug_id, why, r + 1, 1403 atomic_read(&call->net->nr_outstanding_calls), 1404 __builtin_return_address(0)); 1405 return call; 1406} 1407 1408static inline void afs_see_call(struct afs_call *call, enum afs_call_trace why) 1409{ 1410 int r = refcount_read(&call->ref); 1411 1412 trace_afs_call(call->debug_id, why, r, 1413 atomic_read(&call->net->nr_outstanding_calls), 1414 __builtin_return_address(0)); 1415} 1416 1417static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, 1418 gfp_t gfp) 1419{ 1420 struct afs_addr_list *alist = op->estate->addresses; 1421 1422 op->call = call; 1423 op->type = call->type; 1424 call->op = op; 1425 call->key = op->key; 1426 call->intr = !(op->flags & AFS_OPERATION_UNINTR); 1427 call->peer = rxrpc_kernel_get_peer(alist->addrs[op->addr_index].peer); 1428 call->service_id = op->server->service_id; 1429 afs_make_call(call, gfp); 1430} 1431 1432static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) 1433{ 1434 call->iov_len = size; 1435 call->kvec[0].iov_base = buf; 1436 call->kvec[0].iov_len = size; 1437 iov_iter_kvec(&call->def_iter, ITER_DEST, call->kvec, 1, size); 1438} 1439 1440static inline void afs_extract_to_tmp(struct afs_call *call) 1441{ 1442 call->iov_len = sizeof(call->tmp); 1443 afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); 1444} 1445 1446static inline void afs_extract_to_tmp64(struct afs_call *call) 1447{ 1448 call->iov_len = sizeof(call->tmp64); 1449 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); 1450} 1451 1452static inline void afs_extract_discard(struct afs_call *call, size_t size) 1453{ 1454 call->iov_len = size; 1455 iov_iter_discard(&call->def_iter, ITER_DEST, size); 1456} 1457 1458static inline void afs_extract_to_buf(struct afs_call *call, size_t size) 1459{ 1460 call->iov_len = size; 1461 afs_extract_begin(call, call->buffer, size); 1462} 1463 1464static inline int afs_transfer_reply(struct afs_call *call) 1465{ 1466 return afs_extract_data(call, false); 1467} 1468 1469static inline bool afs_check_call_state(struct afs_call *call, 1470 enum afs_call_state state) 1471{ 1472 return READ_ONCE(call->state) == state; 1473} 1474 1475static inline bool afs_set_call_state(struct afs_call *call, 1476 enum afs_call_state from, 1477 enum afs_call_state to) 1478{ 1479 bool ok = false; 1480 1481 spin_lock_bh(&call->state_lock); 1482 if (call->state == from) { 1483 call->state = to; 1484 trace_afs_call_state(call, from, to, 0, 0); 1485 ok = true; 1486 } 1487 spin_unlock_bh(&call->state_lock); 1488 return ok; 1489} 1490 1491static inline void afs_set_call_complete(struct afs_call *call, 1492 int error, u32 remote_abort) 1493{ 1494 enum afs_call_state state; 1495 bool ok = false; 1496 1497 spin_lock_bh(&call->state_lock); 1498 state = call->state; 1499 if (state != AFS_CALL_COMPLETE) { 1500 call->abort_code = remote_abort; 1501 call->error = error; 1502 call->state = AFS_CALL_COMPLETE; 1503 trace_afs_call_state(call, state, AFS_CALL_COMPLETE, 1504 error, remote_abort); 1505 ok = true; 1506 } 1507 spin_unlock_bh(&call->state_lock); 1508 if (ok) { 1509 trace_afs_call_done(call); 1510 1511 /* Asynchronous calls have two refs to release - one from the alloc and 1512 * one queued with the work item - and we can't just deallocate the 1513 * call because the work item may be queued again. 1514 */ 1515 if (call->drop_ref) 1516 afs_put_call(call); 1517 } 1518} 1519 1520/* 1521 * security.c 1522 */ 1523extern void afs_put_permits(struct afs_permits *); 1524extern void afs_clear_permits(struct afs_vnode *); 1525extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, 1526 struct afs_status_cb *); 1527extern struct key *afs_request_key(struct afs_cell *); 1528extern struct key *afs_request_key_rcu(struct afs_cell *); 1529extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); 1530extern int afs_permission(struct mnt_idmap *, struct inode *, int); 1531extern void __exit afs_clean_up_permit_cache(void); 1532 1533/* 1534 * server.c 1535 */ 1536extern spinlock_t afs_server_peer_lock; 1537 1538struct afs_server *afs_find_server(const struct rxrpc_peer *peer); 1539extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); 1540extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); 1541struct afs_server *afs_use_server(struct afs_server *server, bool activate, 1542 enum afs_server_trace reason); 1543void afs_unuse_server(struct afs_net *net, struct afs_server *server, 1544 enum afs_server_trace reason); 1545void afs_unuse_server_notime(struct afs_net *net, struct afs_server *server, 1546 enum afs_server_trace reason); 1547extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); 1548void afs_purge_servers(struct afs_cell *cell); 1549extern void afs_fs_probe_timer(struct timer_list *); 1550void __net_exit afs_wait_for_servers(struct afs_net *net); 1551bool afs_check_server_record(struct afs_operation *op, struct afs_server *server, struct key *key); 1552 1553static inline void afs_see_server(struct afs_server *server, enum afs_server_trace trace) 1554{ 1555 int r = refcount_read(&server->ref); 1556 int a = atomic_read(&server->active); 1557 1558 trace_afs_server(server->debug_id, r, a, trace); 1559 1560} 1561 1562static inline void afs_inc_servers_outstanding(struct afs_net *net) 1563{ 1564 atomic_inc(&net->servers_outstanding); 1565} 1566 1567static inline void afs_dec_servers_outstanding(struct afs_net *net) 1568{ 1569 if (atomic_dec_and_test(&net->servers_outstanding)) 1570 wake_up_var(&net->servers_outstanding); 1571} 1572 1573static inline bool afs_is_probing_server(struct afs_server *server) 1574{ 1575 return list_empty(&server->probe_link); 1576} 1577 1578/* 1579 * server_list.c 1580 */ 1581static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) 1582{ 1583 refcount_inc(&slist->usage); 1584 return slist; 1585} 1586 1587extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); 1588struct afs_server_list *afs_alloc_server_list(struct afs_volume *volume, 1589 struct key *key, 1590 struct afs_vldb_entry *vldb); 1591extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); 1592void afs_attach_volume_to_servers(struct afs_volume *volume, struct afs_server_list *slist); 1593void afs_reattach_volume_to_servers(struct afs_volume *volume, struct afs_server_list *slist, 1594 struct afs_server_list *old); 1595void afs_detach_volume_from_servers(struct afs_volume *volume, struct afs_server_list *slist); 1596 1597/* 1598 * super.c 1599 */ 1600extern int __init afs_fs_init(void); 1601extern void afs_fs_exit(void); 1602 1603/* 1604 * validation.c 1605 */ 1606bool afs_check_validity(const struct afs_vnode *vnode); 1607int afs_update_volume_state(struct afs_operation *op); 1608int afs_validate(struct afs_vnode *vnode, struct key *key); 1609 1610/* 1611 * vlclient.c 1612 */ 1613extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, 1614 const char *, int); 1615extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); 1616struct afs_call *afs_vl_get_capabilities(struct afs_net *net, 1617 struct afs_addr_list *alist, 1618 unsigned int addr_index, 1619 struct key *key, 1620 struct afs_vlserver *server, 1621 unsigned int server_index); 1622extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); 1623extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); 1624 1625/* 1626 * vl_alias.c 1627 */ 1628extern int afs_cell_detect_alias(struct afs_cell *, struct key *); 1629 1630/* 1631 * vl_probe.c 1632 */ 1633extern void afs_vlserver_probe_result(struct afs_call *); 1634extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); 1635extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); 1636 1637/* 1638 * vl_rotate.c 1639 */ 1640extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, 1641 struct afs_cell *, struct key *); 1642extern bool afs_select_vlserver(struct afs_vl_cursor *); 1643extern bool afs_select_current_vlserver(struct afs_vl_cursor *); 1644extern int afs_end_vlserver_operation(struct afs_vl_cursor *); 1645 1646/* 1647 * vlserver_list.c 1648 */ 1649static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) 1650{ 1651 refcount_inc(&vlserver->ref); 1652 return vlserver; 1653} 1654 1655static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) 1656{ 1657 if (vllist) 1658 refcount_inc(&vllist->ref); 1659 return vllist; 1660} 1661 1662extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); 1663extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); 1664extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); 1665extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); 1666extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, 1667 const void *, size_t); 1668 1669/* 1670 * volume.c 1671 */ 1672extern struct afs_volume *afs_create_volume(struct afs_fs_context *); 1673extern int afs_activate_volume(struct afs_volume *); 1674extern void afs_deactivate_volume(struct afs_volume *); 1675bool afs_try_get_volume(struct afs_volume *volume, enum afs_volume_trace reason); 1676extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); 1677void afs_put_volume(struct afs_volume *volume, enum afs_volume_trace reason); 1678extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); 1679 1680/* 1681 * write.c 1682 */ 1683void afs_prepare_write(struct netfs_io_subrequest *subreq); 1684void afs_issue_write(struct netfs_io_subrequest *subreq); 1685void afs_begin_writeback(struct netfs_io_request *wreq); 1686void afs_retry_request(struct netfs_io_request *wreq, struct netfs_io_stream *stream); 1687extern int afs_writepages(struct address_space *, struct writeback_control *); 1688extern int afs_fsync(struct file *, loff_t, loff_t, int); 1689extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); 1690extern void afs_prune_wb_keys(struct afs_vnode *); 1691 1692/* 1693 * xattr.c 1694 */ 1695extern const struct xattr_handler * const afs_xattr_handlers[]; 1696 1697/* 1698 * yfsclient.c 1699 */ 1700extern void yfs_fs_fetch_data(struct afs_operation *); 1701extern void yfs_fs_create_file(struct afs_operation *); 1702extern void yfs_fs_make_dir(struct afs_operation *); 1703extern void yfs_fs_remove_file2(struct afs_operation *); 1704extern void yfs_fs_remove_file(struct afs_operation *); 1705extern void yfs_fs_remove_dir(struct afs_operation *); 1706extern void yfs_fs_link(struct afs_operation *); 1707extern void yfs_fs_symlink(struct afs_operation *); 1708extern void yfs_fs_rename(struct afs_operation *); 1709void yfs_fs_rename_replace(struct afs_operation *op); 1710void yfs_fs_rename_noreplace(struct afs_operation *op); 1711void yfs_fs_rename_exchange(struct afs_operation *op); 1712extern void yfs_fs_store_data(struct afs_operation *); 1713extern void yfs_fs_setattr(struct afs_operation *); 1714extern void yfs_fs_get_volume_status(struct afs_operation *); 1715extern void yfs_fs_set_lock(struct afs_operation *); 1716extern void yfs_fs_extend_lock(struct afs_operation *); 1717extern void yfs_fs_release_lock(struct afs_operation *); 1718extern void yfs_fs_fetch_status(struct afs_operation *); 1719extern void yfs_fs_inline_bulk_status(struct afs_operation *); 1720 1721struct yfs_acl { 1722 struct afs_acl *acl; /* Dir/file/symlink ACL */ 1723 struct afs_acl *vol_acl; /* Whole volume ACL */ 1724 u32 inherit_flag; /* True if ACL is inherited from parent dir */ 1725 u32 num_cleaned; /* Number of ACEs removed due to subject removal */ 1726 unsigned int flags; 1727#define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ 1728#define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ 1729}; 1730 1731extern void yfs_free_opaque_acl(struct yfs_acl *); 1732extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); 1733extern void yfs_fs_store_opaque_acl2(struct afs_operation *); 1734 1735/* 1736 * Miscellaneous inline functions. 1737 */ 1738static inline struct afs_vnode *AFS_FS_I(struct inode *inode) 1739{ 1740 return container_of(inode, struct afs_vnode, netfs.inode); 1741} 1742 1743static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) 1744{ 1745 return &vnode->netfs.inode; 1746} 1747 1748/* 1749 * Note that a dentry got changed. We need to set d_fsdata to the data version 1750 * number derived from the result of the operation. It doesn't matter if 1751 * d_fsdata goes backwards as we'll just revalidate. 1752 */ 1753static inline void afs_update_dentry_version(struct afs_operation *op, 1754 struct afs_vnode_param *dir_vp, 1755 struct dentry *dentry) 1756{ 1757 if (!op->cumul_error.error) 1758 dentry->d_fsdata = 1759 (void *)(unsigned long)dir_vp->scb.status.data_version; 1760} 1761 1762/* 1763 * Set the file size and block count. Estimate the number of 512 bytes blocks 1764 * used, rounded up to nearest 1K for consistency with other AFS clients. 1765 */ 1766static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size) 1767{ 1768 i_size_write(&vnode->netfs.inode, size); 1769 vnode->netfs.inode.i_blocks = ((size + 1023) >> 10) << 1; 1770} 1771 1772/* 1773 * Check for a conflicting operation on a directory that we just unlinked from. 1774 * If someone managed to sneak a link or an unlink in on the file we just 1775 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). 1776 */ 1777static inline void afs_check_dir_conflict(struct afs_operation *op, 1778 struct afs_vnode_param *dvp) 1779{ 1780 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) 1781 op->flags |= AFS_OPERATION_DIR_CONFLICT; 1782} 1783 1784static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) 1785{ 1786 trace_afs_io_error(call->debug_id, -EIO, where); 1787 return -EIO; 1788} 1789 1790static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) 1791{ 1792 trace_afs_file_error(vnode, -EIO, where); 1793 return -EIO; 1794} 1795 1796/* 1797 * Set the callback promise on a vnode. 1798 */ 1799static inline void afs_set_cb_promise(struct afs_vnode *vnode, time64_t expires_at, 1800 enum afs_cb_promise_trace trace) 1801{ 1802 atomic64_set(&vnode->cb_expires_at, expires_at); 1803 trace_afs_cb_promise(vnode, trace); 1804} 1805 1806/* 1807 * Clear the callback promise on a vnode, returning true if it was promised. 1808 */ 1809static inline bool afs_clear_cb_promise(struct afs_vnode *vnode, 1810 enum afs_cb_promise_trace trace) 1811{ 1812 trace_afs_cb_promise(vnode, trace); 1813 return atomic64_xchg(&vnode->cb_expires_at, AFS_NO_CB_PROMISE) != AFS_NO_CB_PROMISE; 1814} 1815 1816/* 1817 * Mark a directory as being invalid. 1818 */ 1819static inline void afs_invalidate_dir(struct afs_vnode *dvnode, 1820 enum afs_dir_invalid_trace trace) 1821{ 1822 if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) { 1823 trace_afs_dir_invalid(dvnode, trace); 1824 afs_stat_v(dvnode, n_inval); 1825 } 1826} 1827 1828/*****************************************************************************/ 1829/* 1830 * debug tracing 1831 */ 1832extern unsigned afs_debug; 1833 1834#define dbgprintk(FMT,...) \ 1835 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) 1836 1837#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1838#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1839#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) 1840 1841 1842#if defined(__KDEBUG) 1843#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) 1844#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) 1845#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) 1846 1847#elif defined(CONFIG_AFS_DEBUG) 1848#define AFS_DEBUG_KENTER 0x01 1849#define AFS_DEBUG_KLEAVE 0x02 1850#define AFS_DEBUG_KDEBUG 0x04 1851 1852#define _enter(FMT,...) \ 1853do { \ 1854 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ 1855 kenter(FMT,##__VA_ARGS__); \ 1856} while (0) 1857 1858#define _leave(FMT,...) \ 1859do { \ 1860 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ 1861 kleave(FMT,##__VA_ARGS__); \ 1862} while (0) 1863 1864#define _debug(FMT,...) \ 1865do { \ 1866 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ 1867 kdebug(FMT,##__VA_ARGS__); \ 1868} while (0) 1869 1870#else 1871#define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) 1872#define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) 1873#define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) 1874#endif 1875 1876/* 1877 * debug assertion checking 1878 */ 1879#if 1 // defined(__KDEBUGALL) 1880 1881#define ASSERT(X) \ 1882do { \ 1883 if (unlikely(!(X))) { \ 1884 printk(KERN_ERR "\n"); \ 1885 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1886 BUG(); \ 1887 } \ 1888} while(0) 1889 1890#define ASSERTCMP(X, OP, Y) \ 1891do { \ 1892 if (unlikely(!((X) OP (Y)))) { \ 1893 printk(KERN_ERR "\n"); \ 1894 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1895 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1896 (unsigned long)(X), (unsigned long)(Y)); \ 1897 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1898 (unsigned long)(X), (unsigned long)(Y)); \ 1899 BUG(); \ 1900 } \ 1901} while(0) 1902 1903#define ASSERTRANGE(L, OP1, N, OP2, H) \ 1904do { \ 1905 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ 1906 printk(KERN_ERR "\n"); \ 1907 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1908 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ 1909 (unsigned long)(L), (unsigned long)(N), \ 1910 (unsigned long)(H)); \ 1911 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ 1912 (unsigned long)(L), (unsigned long)(N), \ 1913 (unsigned long)(H)); \ 1914 BUG(); \ 1915 } \ 1916} while(0) 1917 1918#define ASSERTIF(C, X) \ 1919do { \ 1920 if (unlikely((C) && !(X))) { \ 1921 printk(KERN_ERR "\n"); \ 1922 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1923 BUG(); \ 1924 } \ 1925} while(0) 1926 1927#define ASSERTIFCMP(C, X, OP, Y) \ 1928do { \ 1929 if (unlikely((C) && !((X) OP (Y)))) { \ 1930 printk(KERN_ERR "\n"); \ 1931 printk(KERN_ERR "AFS: Assertion failed\n"); \ 1932 printk(KERN_ERR "%lu " #OP " %lu is false\n", \ 1933 (unsigned long)(X), (unsigned long)(Y)); \ 1934 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ 1935 (unsigned long)(X), (unsigned long)(Y)); \ 1936 BUG(); \ 1937 } \ 1938} while(0) 1939 1940#else 1941 1942#define ASSERT(X) \ 1943do { \ 1944} while(0) 1945 1946#define ASSERTCMP(X, OP, Y) \ 1947do { \ 1948} while(0) 1949 1950#define ASSERTRANGE(L, OP1, N, OP2, H) \ 1951do { \ 1952} while(0) 1953 1954#define ASSERTIF(C, X) \ 1955do { \ 1956} while(0) 1957 1958#define ASSERTIFCMP(C, X, OP, Y) \ 1959do { \ 1960} while(0) 1961 1962#endif /* __KDEBUGALL */
~/
Read-only file preview.