| 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 <net/net_namespace.h> |
| 24 | #include <net/netns/generic.h> |
| 25 | #include <net/sock.h> |
| 26 | #include <net/af_rxrpc.h> |
| 27 | |
| 28 | #include "afs.h" |
| 29 | #include "afs_vl.h" |
| 30 | |
| 31 | #define AFS_CELL_MAX_ADDRS 15 |
| 32 | |
| 33 | struct pagevec; |
| 34 | struct afs_call; |
| 35 | struct afs_vnode; |
| 36 | struct afs_server_probe; |
| 37 | |
| 38 | /* |
| 39 | * Partial file-locking emulation mode. (The problem being that AFS3 only |
| 40 | * allows whole-file locks and no upgrading/downgrading). |
| 41 | */ |
| 42 | enum afs_flock_mode { |
| 43 | afs_flock_mode_unset, |
| 44 | afs_flock_mode_local, /* Local locking only */ |
| 45 | afs_flock_mode_openafs, /* Don't get server lock for a partial lock */ |
| 46 | afs_flock_mode_strict, /* Always get a server lock for a partial lock */ |
| 47 | afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */ |
| 48 | }; |
| 49 | |
| 50 | struct afs_fs_context { |
| 51 | bool force; /* T to force cell type */ |
| 52 | bool autocell; /* T if set auto mount operation */ |
| 53 | bool dyn_root; /* T if dynamic root */ |
| 54 | bool no_cell; /* T if the source is "none" (for dynroot) */ |
| 55 | enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */ |
| 56 | afs_voltype_t type; /* type of volume requested */ |
| 57 | unsigned int volnamesz; /* size of volume name */ |
| 58 | const char *volname; /* name of volume to mount */ |
| 59 | struct afs_net *net; /* the AFS net namespace stuff */ |
| 60 | struct afs_cell *cell; /* cell in which to find volume */ |
| 61 | struct afs_volume *volume; /* volume record */ |
| 62 | struct key *key; /* key to use for secure mounting */ |
| 63 | }; |
| 64 | |
| 65 | enum afs_call_state { |
| 66 | AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */ |
| 67 | AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */ |
| 68 | AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */ |
| 69 | AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */ |
| 70 | AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */ |
| 71 | AFS_CALL_SV_REPLYING, /* Server: Replying */ |
| 72 | AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */ |
| 73 | AFS_CALL_COMPLETE, /* Completed or failed */ |
| 74 | }; |
| 75 | |
| 76 | /* |
| 77 | * Address preferences. |
| 78 | */ |
| 79 | struct afs_addr_preference { |
| 80 | union { |
| 81 | struct in_addr ipv4_addr; /* AF_INET address to compare against */ |
| 82 | struct in6_addr ipv6_addr; /* AF_INET6 address to compare against */ |
| 83 | }; |
| 84 | sa_family_t family; /* Which address to use */ |
| 85 | u16 prio; /* Priority */ |
| 86 | u8 subnet_mask; /* How many bits to compare */ |
| 87 | }; |
| 88 | |
| 89 | struct afs_addr_preference_list { |
| 90 | struct rcu_head rcu; |
| 91 | u16 version; /* Incremented when prefs list changes */ |
| 92 | u8 ipv6_off; /* Offset of IPv6 addresses */ |
| 93 | u8 nr; /* Number of addresses in total */ |
| 94 | u8 max_prefs; /* Number of prefs allocated */ |
| 95 | struct afs_addr_preference prefs[] __counted_by(max_prefs); |
| 96 | }; |
| 97 | |
| 98 | struct afs_address { |
| 99 | struct rxrpc_peer *peer; |
| 100 | short last_error; /* Last error from this address */ |
| 101 | u16 prio; /* Address priority */ |
| 102 | }; |
| 103 | |
| 104 | /* |
| 105 | * List of server addresses. |
| 106 | */ |
| 107 | struct afs_addr_list { |
| 108 | struct rcu_head rcu; |
| 109 | refcount_t usage; |
| 110 | u32 version; /* Version */ |
| 111 | unsigned int debug_id; |
| 112 | unsigned int addr_pref_version; /* Version of address preference list */ |
| 113 | unsigned char max_addrs; |
| 114 | unsigned char nr_addrs; |
| 115 | unsigned char preferred; /* Preferred address */ |
| 116 | unsigned char nr_ipv4; /* Number of IPv4 addresses */ |
| 117 | enum dns_record_source source:8; |
| 118 | enum dns_lookup_status status:8; |
| 119 | unsigned long probe_failed; /* Mask of addrs that failed locally/ICMP */ |
| 120 | unsigned long responded; /* Mask of addrs that responded */ |
| 121 | struct afs_address addrs[] __counted_by(max_addrs); |
| 122 | #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8)) |
| 123 | }; |
| 124 | |
| 125 | /* |
| 126 | * a record of an in-progress RxRPC call |
| 127 | */ |
| 128 | struct afs_call { |
| 129 | const struct afs_call_type *type; /* type of call */ |
| 130 | wait_queue_head_t waitq; /* processes awaiting completion */ |
| 131 | struct work_struct async_work; /* async I/O processor */ |
| 132 | struct work_struct work; /* actual work processor */ |
| 133 | struct rxrpc_call *rxcall; /* RxRPC call handle */ |
| 134 | struct rxrpc_peer *peer; /* Remote endpoint */ |
| 135 | struct key *key; /* security for this call */ |
| 136 | struct afs_net *net; /* The network namespace */ |
| 137 | struct afs_server *server; /* The fileserver record if fs op (pins ref) */ |
| 138 | struct afs_vlserver *vlserver; /* The vlserver record if vl op */ |
| 139 | void *request; /* request data (first part) */ |
| 140 | size_t iov_len; /* Size of *iter to be used */ |
| 141 | struct iov_iter def_iter; /* Default buffer/data iterator */ |
| 142 | struct iov_iter *write_iter; /* Iterator defining write to be made */ |
| 143 | struct iov_iter *iter; /* Iterator currently in use */ |
| 144 | union { /* Convenience for ->def_iter */ |
| 145 | struct kvec kvec[1]; |
| 146 | struct bio_vec bvec[1]; |
| 147 | }; |
| 148 | void *buffer; /* reply receive buffer */ |
| 149 | union { |
| 150 | struct afs_endpoint_state *probe; |
| 151 | struct afs_addr_list *vl_probe; |
| 152 | struct afs_addr_list *ret_alist; |
| 153 | struct afs_vldb_entry *ret_vldb; |
| 154 | char *ret_str; |
| 155 | }; |
| 156 | unsigned char probe_index; /* Address in ->probe_alist */ |
| 157 | struct afs_operation *op; |
| 158 | unsigned int server_index; |
| 159 | refcount_t ref; |
| 160 | enum afs_call_state state; |
| 161 | spinlock_t state_lock; |
| 162 | int error; /* error code */ |
| 163 | u32 abort_code; /* Remote abort ID or 0 */ |
| 164 | unsigned int max_lifespan; /* Maximum lifespan in secs to set if not 0 */ |
| 165 | unsigned request_size; /* size of request data */ |
| 166 | unsigned reply_max; /* maximum size of reply */ |
| 167 | unsigned count2; /* count used in unmarshalling */ |
| 168 | unsigned char unmarshall; /* unmarshalling phase */ |
| 169 | bool drop_ref; /* T if need to drop ref for incoming call */ |
| 170 | bool need_attention; /* T if RxRPC poked us */ |
| 171 | bool async; /* T if asynchronous */ |
| 172 | bool upgrade; /* T to request service upgrade */ |
| 173 | bool intr; /* T if interruptible */ |
| 174 | bool unmarshalling_error; /* T if an unmarshalling error occurred */ |
| 175 | bool responded; /* Got a response from the call (may be abort) */ |
| 176 | u16 service_id; /* Actual service ID (after upgrade) */ |
| 177 | unsigned int debug_id; /* Trace ID */ |
| 178 | u32 operation_ID; /* operation ID for an incoming call */ |
| 179 | u32 count; /* count for use in unmarshalling */ |
| 180 | union { /* place to extract temporary data */ |
| 181 | struct { |
| 182 | __be32 tmp_u; |
| 183 | __be32 tmp; |
| 184 | } __attribute__((packed)); |
| 185 | __be64 tmp64; |
| 186 | }; |
| 187 | ktime_t issue_time; /* Time of issue of operation */ |
| 188 | }; |
| 189 | |
| 190 | struct afs_call_type { |
| 191 | const char *name; |
| 192 | unsigned int op; /* Really enum afs_fs_operation */ |
| 193 | |
| 194 | /* deliver request or reply data to an call |
| 195 | * - returning an error will cause the call to be aborted |
| 196 | */ |
| 197 | int (*deliver)(struct afs_call *call); |
| 198 | |
| 199 | /* clean up a call */ |
| 200 | void (*destructor)(struct afs_call *call); |
| 201 | |
| 202 | /* Work function */ |
| 203 | void (*work)(struct work_struct *work); |
| 204 | |
| 205 | /* Call done function (gets called immediately on success or failure) */ |
| 206 | void (*done)(struct afs_call *call); |
| 207 | }; |
| 208 | |
| 209 | /* |
| 210 | * Key available for writeback on a file. |
| 211 | */ |
| 212 | struct afs_wb_key { |
| 213 | refcount_t usage; |
| 214 | struct key *key; |
| 215 | struct list_head vnode_link; /* Link in vnode->wb_keys */ |
| 216 | }; |
| 217 | |
| 218 | /* |
| 219 | * AFS open file information record. Pointed to by file->private_data. |
| 220 | */ |
| 221 | struct afs_file { |
| 222 | struct key *key; /* The key this file was opened with */ |
| 223 | struct afs_wb_key *wb; /* Writeback key record for this file */ |
| 224 | }; |
| 225 | |
| 226 | static inline struct key *afs_file_key(struct file *file) |
| 227 | { |
| 228 | struct afs_file *af = file->private_data; |
| 229 | |
| 230 | return af->key; |
| 231 | } |
| 232 | |
| 233 | /* |
| 234 | * Record of an outstanding read operation on a vnode. |
| 235 | */ |
| 236 | struct afs_read { |
| 237 | loff_t pos; /* Where to start reading */ |
| 238 | loff_t len; /* How much we're asking for */ |
| 239 | loff_t actual_len; /* How much we're actually getting */ |
| 240 | loff_t file_size; /* File size returned by server */ |
| 241 | struct key *key; /* The key to use to reissue the read */ |
| 242 | struct afs_vnode *vnode; /* The file being read into. */ |
| 243 | struct netfs_io_subrequest *subreq; /* Fscache helper read request this belongs to */ |
| 244 | afs_dataversion_t data_version; /* Version number returned by server */ |
| 245 | refcount_t usage; |
| 246 | unsigned int call_debug_id; |
| 247 | unsigned int nr_pages; |
| 248 | int error; |
| 249 | void (*done)(struct afs_read *); |
| 250 | void (*cleanup)(struct afs_read *); |
| 251 | struct iov_iter *iter; /* Iterator representing the buffer */ |
| 252 | struct iov_iter def_iter; /* Default iterator */ |
| 253 | }; |
| 254 | |
| 255 | /* |
| 256 | * AFS superblock private data |
| 257 | * - there's one superblock per volume |
| 258 | */ |
| 259 | struct afs_super_info { |
| 260 | struct net *net_ns; /* Network namespace */ |
| 261 | struct afs_cell *cell; /* The cell in which the volume resides */ |
| 262 | struct afs_volume *volume; /* volume record */ |
| 263 | enum afs_flock_mode flock_mode:8; /* File locking emulation mode */ |
| 264 | bool dyn_root; /* True if dynamic root */ |
| 265 | }; |
| 266 | |
| 267 | static inline struct afs_super_info *AFS_FS_S(struct super_block *sb) |
| 268 | { |
| 269 | return sb->s_fs_info; |
| 270 | } |
| 271 | |
| 272 | extern struct file_system_type afs_fs_type; |
| 273 | |
| 274 | /* |
| 275 | * Set of substitutes for @sys. |
| 276 | */ |
| 277 | struct afs_sysnames { |
| 278 | #define AFS_NR_SYSNAME 16 |
| 279 | char *subs[AFS_NR_SYSNAME]; |
| 280 | refcount_t usage; |
| 281 | unsigned short nr; |
| 282 | char blank[1]; |
| 283 | }; |
| 284 | |
| 285 | /* |
| 286 | * AFS network namespace record. |
| 287 | */ |
| 288 | struct afs_net { |
| 289 | struct net *net; /* Backpointer to the owning net namespace */ |
| 290 | struct afs_uuid uuid; |
| 291 | bool live; /* F if this namespace is being removed */ |
| 292 | |
| 293 | /* AF_RXRPC I/O stuff */ |
| 294 | struct socket *socket; |
| 295 | struct afs_call *spare_incoming_call; |
| 296 | struct work_struct charge_preallocation_work; |
| 297 | struct mutex socket_mutex; |
| 298 | atomic_t nr_outstanding_calls; |
| 299 | atomic_t nr_superblocks; |
| 300 | |
| 301 | /* Cell database */ |
| 302 | struct rb_root cells; |
| 303 | struct afs_cell *ws_cell; |
| 304 | struct work_struct cells_manager; |
| 305 | struct timer_list cells_timer; |
| 306 | atomic_t cells_outstanding; |
| 307 | struct rw_semaphore cells_lock; |
| 308 | struct mutex cells_alias_lock; |
| 309 | |
| 310 | struct mutex proc_cells_lock; |
| 311 | struct hlist_head proc_cells; |
| 312 | |
| 313 | /* Known servers. Theoretically each fileserver can only be in one |
| 314 | * cell, but in practice, people create aliases and subsets and there's |
| 315 | * no easy way to distinguish them. |
| 316 | */ |
| 317 | seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */ |
| 318 | struct rb_root fs_servers; /* afs_server (by server UUID or address) */ |
| 319 | struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */ |
| 320 | struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */ |
| 321 | struct hlist_head fs_proc; /* procfs servers list */ |
| 322 | |
| 323 | struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */ |
| 324 | struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */ |
| 325 | seqlock_t fs_addr_lock; /* For fs_addresses[46] */ |
| 326 | |
| 327 | struct work_struct fs_manager; |
| 328 | struct timer_list fs_timer; |
| 329 | |
| 330 | struct work_struct fs_prober; |
| 331 | struct timer_list fs_probe_timer; |
| 332 | atomic_t servers_outstanding; |
| 333 | |
| 334 | /* File locking renewal management */ |
| 335 | struct mutex lock_manager_mutex; |
| 336 | |
| 337 | /* Misc */ |
| 338 | struct super_block *dynroot_sb; /* Dynamic root mount superblock */ |
| 339 | struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */ |
| 340 | struct afs_sysnames *sysnames; |
| 341 | rwlock_t sysnames_lock; |
| 342 | struct afs_addr_preference_list __rcu *address_prefs; |
| 343 | u16 address_pref_version; |
| 344 | |
| 345 | /* Statistics counters */ |
| 346 | atomic_t n_lookup; /* Number of lookups done */ |
| 347 | atomic_t n_reval; /* Number of dentries needing revalidation */ |
| 348 | atomic_t n_inval; /* Number of invalidations by the server */ |
| 349 | atomic_t n_relpg; /* Number of invalidations by release_folio */ |
| 350 | atomic_t n_read_dir; /* Number of directory pages read */ |
| 351 | atomic_t n_dir_cr; /* Number of directory entry creation edits */ |
| 352 | atomic_t n_dir_rm; /* Number of directory entry removal edits */ |
| 353 | atomic_t n_stores; /* Number of store ops */ |
| 354 | atomic_long_t n_store_bytes; /* Number of bytes stored */ |
| 355 | atomic_long_t n_fetch_bytes; /* Number of bytes fetched */ |
| 356 | atomic_t n_fetches; /* Number of data fetch ops */ |
| 357 | }; |
| 358 | |
| 359 | extern const char afs_init_sysname[]; |
| 360 | |
| 361 | enum afs_cell_state { |
| 362 | AFS_CELL_UNSET, |
| 363 | AFS_CELL_ACTIVATING, |
| 364 | AFS_CELL_ACTIVE, |
| 365 | AFS_CELL_DEACTIVATING, |
| 366 | AFS_CELL_INACTIVE, |
| 367 | AFS_CELL_FAILED, |
| 368 | AFS_CELL_REMOVED, |
| 369 | }; |
| 370 | |
| 371 | /* |
| 372 | * AFS cell record. |
| 373 | * |
| 374 | * This is a tricky concept to get right as it is possible to create aliases |
| 375 | * simply by pointing AFSDB/SRV records for two names at the same set of VL |
| 376 | * servers; it is also possible to do things like setting up two sets of VL |
| 377 | * servers, one of which provides a superset of the volumes provided by the |
| 378 | * other (for internal/external division, for example). |
| 379 | * |
| 380 | * Cells only exist in the sense that (a) a cell's name maps to a set of VL |
| 381 | * servers and (b) a cell's name is used by the client to select the key to use |
| 382 | * for authentication and encryption. The cell name is not typically used in |
| 383 | * the protocol. |
| 384 | * |
| 385 | * Two cells are determined to be aliases if they have an explicit alias (YFS |
| 386 | * only), share any VL servers in common or have at least one volume in common. |
| 387 | * "In common" means that the address list of the VL servers or the fileservers |
| 388 | * share at least one endpoint. |
| 389 | */ |
| 390 | struct afs_cell { |
| 391 | union { |
| 392 | struct rcu_head rcu; |
| 393 | struct rb_node net_node; /* Node in net->cells */ |
| 394 | }; |
| 395 | struct afs_net *net; |
| 396 | struct afs_cell *alias_of; /* The cell this is an alias of */ |
| 397 | struct afs_volume *root_volume; /* The root.cell volume if there is one */ |
| 398 | struct key *anonymous_key; /* anonymous user key for this cell */ |
| 399 | struct work_struct manager; /* Manager for init/deinit/dns */ |
| 400 | struct hlist_node proc_link; /* /proc cell list link */ |
| 401 | time64_t dns_expiry; /* Time AFSDB/SRV record expires */ |
| 402 | time64_t last_inactive; /* Time of last drop of usage count */ |
| 403 | refcount_t ref; /* Struct refcount */ |
| 404 | atomic_t active; /* Active usage counter */ |
| 405 | unsigned long flags; |
| 406 | #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */ |
| 407 | #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */ |
| 408 | #define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */ |
| 409 | enum afs_cell_state state; |
| 410 | short error; |
| 411 | enum dns_record_source dns_source:8; /* Latest source of data from lookup */ |
| 412 | enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */ |
| 413 | unsigned int dns_lookup_count; /* Counter of DNS lookups */ |
| 414 | unsigned int debug_id; |
| 415 | |
| 416 | /* The volumes belonging to this cell */ |
| 417 | struct rw_semaphore vs_lock; /* Lock for server->volumes */ |
| 418 | struct rb_root volumes; /* Tree of volumes on this server */ |
| 419 | struct hlist_head proc_volumes; /* procfs volume list */ |
| 420 | seqlock_t volume_lock; /* For volumes */ |
| 421 | |
| 422 | /* Active fileserver interaction state. */ |
| 423 | struct rb_root fs_servers; /* afs_server (by server UUID) */ |
| 424 | seqlock_t fs_lock; /* For fs_servers */ |
| 425 | struct rw_semaphore fs_open_mmaps_lock; |
| 426 | struct list_head fs_open_mmaps; /* List of vnodes that are mmapped */ |
| 427 | atomic_t fs_s_break; /* Counter of CB.InitCallBackState messages */ |
| 428 | |
| 429 | /* VL server list. */ |
| 430 | rwlock_t vl_servers_lock; /* Lock on vl_servers */ |
| 431 | struct afs_vlserver_list __rcu *vl_servers; |
| 432 | |
| 433 | u8 name_len; /* Length of name */ |
| 434 | char *name; /* Cell name, case-flattened and NUL-padded */ |
| 435 | }; |
| 436 | |
| 437 | /* |
| 438 | * Volume Location server record. |
| 439 | */ |
| 440 | struct afs_vlserver { |
| 441 | struct rcu_head rcu; |
| 442 | struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */ |
| 443 | unsigned long flags; |
| 444 | #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */ |
| 445 | #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */ |
| 446 | #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */ |
| 447 | #define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */ |
| 448 | rwlock_t lock; /* Lock on addresses */ |
| 449 | refcount_t ref; |
| 450 | unsigned int rtt; /* Server's current RTT in uS */ |
| 451 | unsigned int debug_id; |
| 452 | |
| 453 | /* Probe state */ |
| 454 | wait_queue_head_t probe_wq; |
| 455 | atomic_t probe_outstanding; |
| 456 | spinlock_t probe_lock; |
| 457 | struct { |
| 458 | unsigned int rtt; /* Best RTT in uS (or UINT_MAX) */ |
| 459 | u32 abort_code; |
| 460 | short error; |
| 461 | unsigned short flags; |
| 462 | #define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */ |
| 463 | #define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */ |
| 464 | #define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */ |
| 465 | #define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */ |
| 466 | } probe; |
| 467 | |
| 468 | u16 service_id; /* Service ID we're using */ |
| 469 | u16 port; |
| 470 | u16 name_len; /* Length of name */ |
| 471 | char name[]; /* Server name, case-flattened */ |
| 472 | }; |
| 473 | |
| 474 | /* |
| 475 | * Weighted list of Volume Location servers. |
| 476 | */ |
| 477 | struct afs_vlserver_entry { |
| 478 | u16 priority; /* Preference (as SRV) */ |
| 479 | u16 weight; /* Weight (as SRV) */ |
| 480 | enum dns_record_source source:8; |
| 481 | enum dns_lookup_status status:8; |
| 482 | struct afs_vlserver *server; |
| 483 | }; |
| 484 | |
| 485 | struct afs_vlserver_list { |
| 486 | struct rcu_head rcu; |
| 487 | refcount_t ref; |
| 488 | u8 nr_servers; |
| 489 | u8 index; /* Server currently in use */ |
| 490 | u8 preferred; /* Preferred server */ |
| 491 | enum dns_record_source source:8; |
| 492 | enum dns_lookup_status status:8; |
| 493 | rwlock_t lock; |
| 494 | struct afs_vlserver_entry servers[]; |
| 495 | }; |
| 496 | |
| 497 | /* |
| 498 | * Cached VLDB entry. |
| 499 | * |
| 500 | * This is pointed to by cell->vldb_entries, indexed by name. |
| 501 | */ |
| 502 | struct afs_vldb_entry { |
| 503 | afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */ |
| 504 | |
| 505 | unsigned long flags; |
| 506 | #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */ |
| 507 | #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */ |
| 508 | #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */ |
| 509 | #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */ |
| 510 | #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */ |
| 511 | |
| 512 | uuid_t fs_server[AFS_NMAXNSERVERS]; |
| 513 | u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */ |
| 514 | u8 fs_mask[AFS_NMAXNSERVERS]; |
| 515 | #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */ |
| 516 | #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */ |
| 517 | #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */ |
| 518 | u8 vlsf_flags[AFS_NMAXNSERVERS]; |
| 519 | short error; |
| 520 | u8 nr_servers; /* Number of server records */ |
| 521 | u8 name_len; |
| 522 | u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ |
| 523 | }; |
| 524 | |
| 525 | /* |
| 526 | * Fileserver endpoint state. The records the addresses of a fileserver's |
| 527 | * endpoints and the state and result of a round of probing on them. This |
| 528 | * allows the rotation algorithm to access those results without them being |
| 529 | * erased by a subsequent round of probing. |
| 530 | */ |
| 531 | struct afs_endpoint_state { |
| 532 | struct rcu_head rcu; |
| 533 | struct afs_addr_list *addresses; /* The addresses being probed */ |
| 534 | unsigned long responsive_set; /* Bitset of responsive endpoints */ |
| 535 | unsigned long failed_set; /* Bitset of endpoints we failed to probe */ |
| 536 | refcount_t ref; |
| 537 | unsigned int server_id; /* Debug ID of server */ |
| 538 | unsigned int probe_seq; /* Probe sequence (from server::probe_counter) */ |
| 539 | atomic_t nr_probing; /* Number of outstanding probes */ |
| 540 | unsigned int rtt; /* Best RTT in uS (or UINT_MAX) */ |
| 541 | s32 abort_code; |
| 542 | short error; |
| 543 | unsigned long flags; |
| 544 | #define AFS_ESTATE_RESPONDED 0 /* Set if the server responded */ |
| 545 | #define AFS_ESTATE_SUPERSEDED 1 /* Set if this record has been superseded */ |
| 546 | #define AFS_ESTATE_IS_YFS 2 /* Set if probe upgraded to YFS */ |
| 547 | #define AFS_ESTATE_NOT_YFS 3 /* Set if probe didn't upgrade to YFS */ |
| 548 | #define AFS_ESTATE_LOCAL_FAILURE 4 /* Set if there was a local failure (eg. ENOMEM) */ |
| 549 | }; |
| 550 | |
| 551 | /* |
| 552 | * Record of fileserver with which we're actively communicating. |
| 553 | */ |
| 554 | struct afs_server { |
| 555 | struct rcu_head rcu; |
| 556 | union { |
| 557 | uuid_t uuid; /* Server ID */ |
| 558 | struct afs_uuid _uuid; |
| 559 | }; |
| 560 | |
| 561 | struct afs_cell *cell; /* Cell to which belongs (pins ref) */ |
| 562 | struct rb_node uuid_rb; /* Link in net->fs_servers */ |
| 563 | struct afs_server __rcu *uuid_next; /* Next server with same UUID */ |
| 564 | struct afs_server *uuid_prev; /* Previous server with same UUID */ |
| 565 | struct list_head probe_link; /* Link in net->fs_probe_list */ |
| 566 | struct hlist_node addr4_link; /* Link in net->fs_addresses4 */ |
| 567 | struct hlist_node addr6_link; /* Link in net->fs_addresses6 */ |
| 568 | struct hlist_node proc_link; /* Link in net->fs_proc */ |
| 569 | struct list_head volumes; /* RCU list of afs_server_entry objects */ |
| 570 | struct afs_server *gc_next; /* Next server in manager's list */ |
| 571 | time64_t unuse_time; /* Time at which last unused */ |
| 572 | unsigned long flags; |
| 573 | #define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */ |
| 574 | #define AFS_SERVER_FL_UPDATING 1 |
| 575 | #define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */ |
| 576 | #define AFS_SERVER_FL_NOT_READY 4 /* The record is not ready for use */ |
| 577 | #define AFS_SERVER_FL_NOT_FOUND 5 /* VL server says no such server */ |
| 578 | #define AFS_SERVER_FL_VL_FAIL 6 /* Failed to access VL server */ |
| 579 | #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */ |
| 580 | #define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */ |
| 581 | #define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */ |
| 582 | #define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */ |
| 583 | #define AFS_SERVER_FL_HAS_FS64 19 /* Fileserver supports FS.{Fetch,Store}Data64 */ |
| 584 | refcount_t ref; /* Object refcount */ |
| 585 | atomic_t active; /* Active user count */ |
| 586 | u32 addr_version; /* Address list version */ |
| 587 | u16 service_id; /* Service ID we're using. */ |
| 588 | unsigned int rtt; /* Server's current RTT in uS */ |
| 589 | unsigned int debug_id; /* Debugging ID for traces */ |
| 590 | |
| 591 | /* file service access */ |
| 592 | rwlock_t fs_lock; /* access lock */ |
| 593 | |
| 594 | /* callback promise management */ |
| 595 | unsigned cb_s_break; /* Break-everything counter. */ |
| 596 | |
| 597 | /* Probe state */ |
| 598 | struct afs_endpoint_state __rcu *endpoint_state; /* Latest endpoint/probe state */ |
| 599 | unsigned long probed_at; /* Time last probe was dispatched (jiffies) */ |
| 600 | wait_queue_head_t probe_wq; |
| 601 | unsigned int probe_counter; /* Number of probes issued */ |
| 602 | spinlock_t probe_lock; |
| 603 | }; |
| 604 | |
| 605 | enum afs_ro_replicating { |
| 606 | AFS_RO_NOT_REPLICATING, /* Not doing replication */ |
| 607 | AFS_RO_REPLICATING_USE_OLD, /* Replicating; use old version */ |
| 608 | AFS_RO_REPLICATING_USE_NEW, /* Replicating; switch to new version */ |
| 609 | } __mode(byte); |
| 610 | |
| 611 | /* |
| 612 | * Replaceable volume server list. |
| 613 | */ |
| 614 | struct afs_server_entry { |
| 615 | struct afs_server *server; |
| 616 | struct afs_volume *volume; |
| 617 | struct list_head slink; /* Link in server->volumes */ |
| 618 | unsigned long flags; |
| 619 | #define AFS_SE_EXCLUDED 0 /* Set if server is to be excluded in rotation */ |
| 620 | }; |
| 621 | |
| 622 | struct afs_server_list { |
| 623 | struct rcu_head rcu; |
| 624 | refcount_t usage; |
| 625 | bool attached; /* T if attached to servers */ |
| 626 | enum afs_ro_replicating ro_replicating; /* RW->RO update (probably) in progress */ |
| 627 | unsigned char nr_servers; |
| 628 | unsigned char preferred; /* Preferred server */ |
| 629 | unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */ |
| 630 | unsigned int seq; /* Set to ->servers_seq when installed */ |
| 631 | rwlock_t lock; |
| 632 | struct afs_server_entry servers[]; |
| 633 | }; |
| 634 | |
| 635 | /* |
| 636 | * Live AFS volume management. |
| 637 | */ |
| 638 | struct afs_volume { |
| 639 | struct rcu_head rcu; |
| 640 | afs_volid_t vid; /* The volume ID of this volume */ |
| 641 | afs_volid_t vids[AFS_MAXTYPES]; /* All associated volume IDs */ |
| 642 | refcount_t ref; |
| 643 | time64_t update_at; /* Time at which to next update */ |
| 644 | struct afs_cell *cell; /* Cell to which belongs (pins ref) */ |
| 645 | struct rb_node cell_node; /* Link in cell->volumes */ |
| 646 | struct hlist_node proc_link; /* Link in cell->proc_volumes */ |
| 647 | struct super_block __rcu *sb; /* Superblock on which inodes reside */ |
| 648 | struct work_struct destructor; /* Deferred destructor */ |
| 649 | unsigned long flags; |
| 650 | #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */ |
| 651 | #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */ |
| 652 | #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */ |
| 653 | #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */ |
| 654 | #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */ |
| 655 | #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */ |
| 656 | #define AFS_VOLUME_MAYBE_NO_IBULK 6 /* - T if some servers don't have InlineBulkStatus */ |
| 657 | #define AFS_VOLUME_RM_TREE 7 /* - Set if volume removed from cell->volumes */ |
| 658 | #ifdef CONFIG_AFS_FSCACHE |
| 659 | struct fscache_volume *cache; /* Caching cookie */ |
| 660 | #endif |
| 661 | struct afs_server_list __rcu *servers; /* List of servers on which volume resides */ |
| 662 | rwlock_t servers_lock; /* Lock for ->servers */ |
| 663 | unsigned int servers_seq; /* Incremented each time ->servers changes */ |
| 664 | |
| 665 | /* RO release tracking */ |
| 666 | struct mutex volsync_lock; /* Time/state evaluation lock */ |
| 667 | time64_t creation_time; /* Volume creation time (or TIME64_MIN) */ |
| 668 | time64_t update_time; /* Volume update time (or TIME64_MIN) */ |
| 669 | |
| 670 | /* Callback management */ |
| 671 | atomic_t cb_ro_snapshot; /* RO volume update-from-snapshot counter */ |
| 672 | atomic_t cb_v_break; /* Volume-break event counter. */ |
| 673 | atomic_t cb_scrub; /* Scrub-all-data event counter. */ |
| 674 | rwlock_t cb_v_break_lock; |
| 675 | |
| 676 | afs_voltype_t type; /* type of volume */ |
| 677 | char type_force; /* force volume type (suppress R/O -> R/W) */ |
| 678 | u8 name_len; |
| 679 | u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */ |
| 680 | }; |
| 681 | |
| 682 | enum afs_lock_state { |
| 683 | AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */ |
| 684 | AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */ |
| 685 | AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */ |
| 686 | AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */ |
| 687 | AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */ |
| 688 | AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */ |
| 689 | AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */ |
| 690 | AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */ |
| 691 | }; |
| 692 | |
| 693 | /* |
| 694 | * AFS inode private data. |
| 695 | * |
| 696 | * Note that afs_alloc_inode() *must* reset anything that could incorrectly |
| 697 | * leak from one inode to another. |
| 698 | */ |
| 699 | struct afs_vnode { |
| 700 | struct netfs_inode netfs; /* Netfslib context and vfs inode */ |
| 701 | struct afs_volume *volume; /* volume on which vnode resides */ |
| 702 | struct afs_fid fid; /* the file identifier for this inode */ |
| 703 | struct afs_file_status status; /* AFS status info for this file */ |
| 704 | afs_dataversion_t invalid_before; /* Child dentries are invalid before this */ |
| 705 | struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */ |
| 706 | struct mutex io_lock; /* Lock for serialising I/O on this mutex */ |
| 707 | struct rw_semaphore validate_lock; /* lock for validating this vnode */ |
| 708 | struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */ |
| 709 | struct key *silly_key; /* Silly rename key */ |
| 710 | spinlock_t wb_lock; /* lock for wb_keys */ |
| 711 | spinlock_t lock; /* waitqueue/flags lock */ |
| 712 | unsigned long flags; |
| 713 | #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */ |
| 714 | #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */ |
| 715 | #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */ |
| 716 | #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */ |
| 717 | #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */ |
| 718 | #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */ |
| 719 | #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */ |
| 720 | #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */ |
| 721 | #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */ |
| 722 | #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */ |
| 723 | #define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */ |
| 724 | |
| 725 | struct list_head wb_keys; /* List of keys available for writeback */ |
| 726 | struct list_head pending_locks; /* locks waiting to be granted */ |
| 727 | struct list_head granted_locks; /* locks granted on this file */ |
| 728 | struct delayed_work lock_work; /* work to be done in locking */ |
| 729 | struct key *lock_key; /* Key to be used in lock ops */ |
| 730 | ktime_t locked_at; /* Time at which lock obtained */ |
| 731 | enum afs_lock_state lock_state : 8; |
| 732 | afs_lock_type_t lock_type : 8; |
| 733 | |
| 734 | /* outstanding callback notification on this file */ |
| 735 | struct work_struct cb_work; /* Work for mmap'd files */ |
| 736 | struct list_head cb_mmap_link; /* Link in cell->fs_open_mmaps */ |
| 737 | void *cb_server; /* Server with callback/filelock */ |
| 738 | atomic_t cb_nr_mmap; /* Number of mmaps */ |
| 739 | unsigned int cb_fs_s_break; /* Mass server break counter (cell->fs_s_break) */ |
| 740 | unsigned int cb_s_break; /* Mass break counter on ->server */ |
| 741 | unsigned int cb_v_break; /* Mass break counter on ->volume */ |
| 742 | unsigned int cb_break; /* Break counter on vnode */ |
| 743 | seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */ |
| 744 | |
| 745 | time64_t cb_expires_at; /* time at which callback expires */ |
| 746 | }; |
| 747 | |
| 748 | static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode) |
| 749 | { |
| 750 | #ifdef CONFIG_AFS_FSCACHE |
| 751 | return netfs_i_cookie(&vnode->netfs); |
| 752 | #else |
| 753 | return NULL; |
| 754 | #endif |
| 755 | } |
| 756 | |
| 757 | static inline void afs_vnode_set_cache(struct afs_vnode *vnode, |
| 758 | struct fscache_cookie *cookie) |
| 759 | { |
| 760 | #ifdef CONFIG_AFS_FSCACHE |
| 761 | vnode->netfs.cache = cookie; |
| 762 | if (cookie) |
| 763 | mapping_set_release_always(vnode->netfs.inode.i_mapping); |
| 764 | #endif |
| 765 | } |
| 766 | |
| 767 | /* |
| 768 | * cached security record for one user's attempt to access a vnode |
| 769 | */ |
| 770 | struct afs_permit { |
| 771 | struct key *key; /* RxRPC ticket holding a security context */ |
| 772 | afs_access_t access; /* CallerAccess value for this key */ |
| 773 | }; |
| 774 | |
| 775 | /* |
| 776 | * Immutable cache of CallerAccess records from attempts to access vnodes. |
| 777 | * These may be shared between multiple vnodes. |
| 778 | */ |
| 779 | struct afs_permits { |
| 780 | struct rcu_head rcu; |
| 781 | struct hlist_node hash_node; /* Link in hash */ |
| 782 | unsigned long h; /* Hash value for this permit list */ |
| 783 | refcount_t usage; |
| 784 | unsigned short nr_permits; /* Number of records */ |
| 785 | bool invalidated; /* Invalidated due to key change */ |
| 786 | struct afs_permit permits[] __counted_by(nr_permits); /* List of permits sorted by key pointer */ |
| 787 | }; |
| 788 | |
| 789 | /* |
| 790 | * Error prioritisation and accumulation. |
| 791 | */ |
| 792 | struct afs_error { |
| 793 | s32 abort_code; /* Cumulative abort code */ |
| 794 | short error; /* Cumulative error */ |
| 795 | bool responded; /* T if server responded */ |
| 796 | bool aborted; /* T if ->error is from an abort */ |
| 797 | }; |
| 798 | |
| 799 | /* |
| 800 | * Cursor for iterating over a set of volume location servers. |
| 801 | */ |
| 802 | struct afs_vl_cursor { |
| 803 | struct afs_cell *cell; /* The cell we're querying */ |
| 804 | struct afs_vlserver_list *server_list; /* Current server list (pins ref) */ |
| 805 | struct afs_vlserver *server; /* Server on which this resides */ |
| 806 | struct afs_addr_list *alist; /* Current address list (pins ref) */ |
| 807 | struct key *key; /* Key for the server */ |
| 808 | unsigned long untried_servers; /* Bitmask of untried servers */ |
| 809 | unsigned long addr_tried; /* Tried addresses */ |
| 810 | struct afs_error cumul_error; /* Cumulative error */ |
| 811 | unsigned int debug_id; |
| 812 | s32 call_abort_code; |
| 813 | short call_error; /* Error from single call */ |
| 814 | short server_index; /* Current server */ |
| 815 | signed char addr_index; /* Current address */ |
| 816 | unsigned short flags; |
| 817 | #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */ |
| 818 | #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */ |
| 819 | #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */ |
| 820 | short nr_iterations; /* Number of server iterations */ |
| 821 | bool call_responded; /* T if the current address responded */ |
| 822 | }; |
| 823 | |
| 824 | /* |
| 825 | * Fileserver operation methods. |
| 826 | */ |
| 827 | struct afs_operation_ops { |
| 828 | void (*issue_afs_rpc)(struct afs_operation *op); |
| 829 | void (*issue_yfs_rpc)(struct afs_operation *op); |
| 830 | void (*success)(struct afs_operation *op); |
| 831 | void (*aborted)(struct afs_operation *op); |
| 832 | void (*failed)(struct afs_operation *op); |
| 833 | void (*edit_dir)(struct afs_operation *op); |
| 834 | void (*put)(struct afs_operation *op); |
| 835 | }; |
| 836 | |
| 837 | struct afs_vnode_param { |
| 838 | struct afs_vnode *vnode; |
| 839 | struct afs_fid fid; /* Fid to access */ |
| 840 | struct afs_status_cb scb; /* Returned status and callback promise */ |
| 841 | afs_dataversion_t dv_before; /* Data version before the call */ |
| 842 | unsigned int cb_break_before; /* cb_break + cb_s_break before the call */ |
| 843 | u8 dv_delta; /* Expected change in data version */ |
| 844 | bool put_vnode:1; /* T if we have a ref on the vnode */ |
| 845 | bool need_io_lock:1; /* T if we need the I/O lock on this */ |
| 846 | bool update_ctime:1; /* Need to update the ctime */ |
| 847 | bool set_size:1; /* Must update i_size */ |
| 848 | bool op_unlinked:1; /* True if file was unlinked by op */ |
| 849 | bool speculative:1; /* T if speculative status fetch (no vnode lock) */ |
| 850 | bool modification:1; /* Set if the content gets modified */ |
| 851 | }; |
| 852 | |
| 853 | /* |
| 854 | * Fileserver operation wrapper, handling server and address rotation |
| 855 | * asynchronously. May make simultaneous calls to multiple servers. |
| 856 | */ |
| 857 | struct afs_operation { |
| 858 | struct afs_net *net; /* Network namespace */ |
| 859 | struct key *key; /* Key for the cell */ |
| 860 | const struct afs_call_type *type; /* Type of call done */ |
| 861 | const struct afs_operation_ops *ops; |
| 862 | |
| 863 | /* Parameters/results for the operation */ |
| 864 | struct afs_volume *volume; /* Volume being accessed */ |
| 865 | struct afs_vnode_param file[2]; |
| 866 | struct afs_vnode_param *more_files; |
| 867 | struct afs_volsync pre_volsync; /* Volsync before op */ |
| 868 | struct afs_volsync volsync; /* Volsync returned by op */ |
| 869 | struct dentry *dentry; /* Dentry to be altered */ |
| 870 | struct dentry *dentry_2; /* Second dentry to be altered */ |
| 871 | struct timespec64 mtime; /* Modification time to record */ |
| 872 | struct timespec64 ctime; /* Change time to set */ |
| 873 | struct afs_error cumul_error; /* Cumulative error */ |
| 874 | short nr_files; /* Number of entries in file[], more_files */ |
| 875 | unsigned int debug_id; |
| 876 | |
| 877 | unsigned int cb_v_break; /* Volume break counter before op */ |
| 878 | unsigned int cb_s_break; /* Server break counter before op */ |
| 879 | |
| 880 | union { |
| 881 | struct { |
| 882 | int which; /* Which ->file[] to fetch for */ |
| 883 | } fetch_status; |
| 884 | struct { |
| 885 | int reason; /* enum afs_edit_dir_reason */ |
| 886 | mode_t mode; |
| 887 | const char *symlink; |
| 888 | } create; |
| 889 | struct { |
| 890 | bool need_rehash; |
| 891 | } unlink; |
| 892 | struct { |
| 893 | struct dentry *rehash; |
| 894 | struct dentry *tmp; |
| 895 | bool new_negative; |
| 896 | } rename; |
| 897 | struct { |
| 898 | struct afs_read *req; |
| 899 | } fetch; |
| 900 | struct { |
| 901 | afs_lock_type_t type; |
| 902 | } lock; |
| 903 | struct { |
| 904 | struct iov_iter *write_iter; |
| 905 | loff_t pos; |
| 906 | loff_t size; |
| 907 | loff_t i_size; |
| 908 | bool laundering; /* Laundering page, PG_writeback not set */ |
| 909 | } store; |
| 910 | struct { |
| 911 | struct iattr *attr; |
| 912 | loff_t old_i_size; |
| 913 | } setattr; |
| 914 | struct afs_acl *acl; |
| 915 | struct yfs_acl *yacl; |
| 916 | struct { |
| 917 | struct afs_volume_status vs; |
| 918 | struct kstatfs *buf; |
| 919 | } volstatus; |
| 920 | }; |
| 921 | |
| 922 | /* Fileserver iteration state */ |
| 923 | struct afs_server_list *server_list; /* Current server list (pins ref) */ |
| 924 | struct afs_server *server; /* Server we're using (ref pinned by server_list) */ |
| 925 | struct afs_endpoint_state *estate; /* Current endpoint state (pins ref) */ |
| 926 | struct afs_call *call; |
| 927 | unsigned long untried_servers; /* Bitmask of untried servers */ |
| 928 | unsigned long addr_tried; /* Tried addresses */ |
| 929 | s32 call_abort_code; /* Abort code from single call */ |
| 930 | short call_error; /* Error from single call */ |
| 931 | short server_index; /* Current server */ |
| 932 | short nr_iterations; /* Number of server iterations */ |
| 933 | signed char addr_index; /* Current address */ |
| 934 | bool call_responded; /* T if the current address responded */ |
| 935 | |
| 936 | unsigned int flags; |
| 937 | #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */ |
| 938 | #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */ |
| 939 | #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */ |
| 940 | #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */ |
| 941 | #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */ |
| 942 | #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */ |
| 943 | #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */ |
| 944 | #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */ |
| 945 | #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */ |
| 946 | #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */ |
| 947 | #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */ |
| 948 | #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */ |
| 949 | #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */ |
| 950 | }; |
| 951 | |
| 952 | /* |
| 953 | * Cache auxiliary data. |
| 954 | */ |
| 955 | struct afs_vnode_cache_aux { |
| 956 | __be64 data_version; |
| 957 | } __packed; |
| 958 | |
| 959 | static inline void afs_set_cache_aux(struct afs_vnode *vnode, |
| 960 | struct afs_vnode_cache_aux *aux) |
| 961 | { |
| 962 | aux->data_version = cpu_to_be64(vnode->status.data_version); |
| 963 | } |
| 964 | |
| 965 | static inline void afs_invalidate_cache(struct afs_vnode *vnode, unsigned int flags) |
| 966 | { |
| 967 | struct afs_vnode_cache_aux aux; |
| 968 | |
| 969 | afs_set_cache_aux(vnode, &aux); |
| 970 | fscache_invalidate(afs_vnode_cache(vnode), &aux, |
| 971 | i_size_read(&vnode->netfs.inode), flags); |
| 972 | } |
| 973 | |
| 974 | /* |
| 975 | * We use folio->private to hold the amount of the folio that we've written to, |
| 976 | * splitting the field into two parts. However, we need to represent a range |
| 977 | * 0...FOLIO_SIZE, so we reduce the resolution if the size of the folio |
| 978 | * exceeds what we can encode. |
| 979 | */ |
| 980 | #ifdef CONFIG_64BIT |
| 981 | #define __AFS_FOLIO_PRIV_MASK 0x7fffffffUL |
| 982 | #define __AFS_FOLIO_PRIV_SHIFT 32 |
| 983 | #define __AFS_FOLIO_PRIV_MMAPPED 0x80000000UL |
| 984 | #else |
| 985 | #define __AFS_FOLIO_PRIV_MASK 0x7fffUL |
| 986 | #define __AFS_FOLIO_PRIV_SHIFT 16 |
| 987 | #define __AFS_FOLIO_PRIV_MMAPPED 0x8000UL |
| 988 | #endif |
| 989 | |
| 990 | static inline unsigned int afs_folio_dirty_resolution(struct folio *folio) |
| 991 | { |
| 992 | int shift = folio_shift(folio) - (__AFS_FOLIO_PRIV_SHIFT - 1); |
| 993 | return (shift > 0) ? shift : 0; |
| 994 | } |
| 995 | |
| 996 | static inline size_t afs_folio_dirty_from(struct folio *folio, unsigned long priv) |
| 997 | { |
| 998 | unsigned long x = priv & __AFS_FOLIO_PRIV_MASK; |
| 999 | |
| 1000 | /* The lower bound is inclusive */ |
| 1001 | return x << afs_folio_dirty_resolution(folio); |
| 1002 | } |
| 1003 | |
| 1004 | static inline size_t afs_folio_dirty_to(struct folio *folio, unsigned long priv) |
| 1005 | { |
| 1006 | unsigned long x = (priv >> __AFS_FOLIO_PRIV_SHIFT) & __AFS_FOLIO_PRIV_MASK; |
| 1007 | |
| 1008 | /* The upper bound is immediately beyond the region */ |
| 1009 | return (x + 1) << afs_folio_dirty_resolution(folio); |
| 1010 | } |
| 1011 | |
| 1012 | static inline unsigned long afs_folio_dirty(struct folio *folio, size_t from, size_t to) |
| 1013 | { |
| 1014 | unsigned int res = afs_folio_dirty_resolution(folio); |
| 1015 | from >>= res; |
| 1016 | to = (to - 1) >> res; |
| 1017 | return (to << __AFS_FOLIO_PRIV_SHIFT) | from; |
| 1018 | } |
| 1019 | |
| 1020 | static inline unsigned long afs_folio_dirty_mmapped(unsigned long priv) |
| 1021 | { |
| 1022 | return priv | __AFS_FOLIO_PRIV_MMAPPED; |
| 1023 | } |
| 1024 | |
| 1025 | static inline bool afs_is_folio_dirty_mmapped(unsigned long priv) |
| 1026 | { |
| 1027 | return priv & __AFS_FOLIO_PRIV_MMAPPED; |
| 1028 | } |
| 1029 | |
| 1030 | #include <trace/events/afs.h> |
| 1031 | |
| 1032 | /*****************************************************************************/ |
| 1033 | /* |
| 1034 | * addr_list.c |
| 1035 | */ |
| 1036 | struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist, enum afs_alist_trace reason); |
| 1037 | extern struct afs_addr_list *afs_alloc_addrlist(unsigned int nr); |
| 1038 | extern void afs_put_addrlist(struct afs_addr_list *alist, enum afs_alist_trace reason); |
| 1039 | extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *, |
| 1040 | const char *, size_t, char, |
| 1041 | unsigned short, unsigned short); |
| 1042 | bool afs_addr_list_same(const struct afs_addr_list *a, |
| 1043 | const struct afs_addr_list *b); |
| 1044 | extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *); |
| 1045 | |
| 1046 | extern int afs_merge_fs_addr4(struct afs_net *net, struct afs_addr_list *addr, |
| 1047 | __be32 xdr, u16 port); |
| 1048 | extern int afs_merge_fs_addr6(struct afs_net *net, struct afs_addr_list *addr, |
| 1049 | __be32 *xdr, u16 port); |
| 1050 | |
| 1051 | /* |
| 1052 | * addr_prefs.c |
| 1053 | */ |
| 1054 | int afs_proc_addr_prefs_write(struct file *file, char *buf, size_t size); |
| 1055 | void afs_get_address_preferences_rcu(struct afs_net *net, struct afs_addr_list *alist); |
| 1056 | void afs_get_address_preferences(struct afs_net *net, struct afs_addr_list *alist); |
| 1057 | |
| 1058 | /* |
| 1059 | * callback.c |
| 1060 | */ |
| 1061 | extern void afs_invalidate_mmap_work(struct work_struct *); |
| 1062 | extern void afs_init_callback_state(struct afs_server *); |
| 1063 | extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); |
| 1064 | extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason); |
| 1065 | extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *); |
| 1066 | |
| 1067 | static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode) |
| 1068 | { |
| 1069 | return vnode->cb_break + vnode->cb_v_break; |
| 1070 | } |
| 1071 | |
| 1072 | static inline bool afs_cb_is_broken(unsigned int cb_break, |
| 1073 | const struct afs_vnode *vnode) |
| 1074 | { |
| 1075 | return cb_break != (vnode->cb_break + atomic_read(&vnode->volume->cb_v_break)); |
| 1076 | } |
| 1077 | |
| 1078 | /* |
| 1079 | * cell.c |
| 1080 | */ |
| 1081 | extern int afs_cell_init(struct afs_net *, const char *); |
| 1082 | extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned, |
| 1083 | enum afs_cell_trace); |
| 1084 | extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned, |
| 1085 | const char *, bool); |
| 1086 | extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace); |
| 1087 | extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace); |
| 1088 | extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace); |
| 1089 | extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace); |
| 1090 | extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace); |
| 1091 | extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace); |
| 1092 | extern void afs_manage_cells(struct work_struct *); |
| 1093 | extern void afs_cells_timer(struct timer_list *); |
| 1094 | extern void __net_exit afs_cell_purge(struct afs_net *); |
| 1095 | |
| 1096 | /* |
| 1097 | * cmservice.c |
| 1098 | */ |
| 1099 | extern bool afs_cm_incoming_call(struct afs_call *); |
| 1100 | |
| 1101 | /* |
| 1102 | * dir.c |
| 1103 | */ |
| 1104 | extern const struct file_operations afs_dir_file_operations; |
| 1105 | extern const struct inode_operations afs_dir_inode_operations; |
| 1106 | extern const struct address_space_operations afs_dir_aops; |
| 1107 | extern const struct dentry_operations afs_fs_dentry_operations; |
| 1108 | |
| 1109 | extern void afs_d_release(struct dentry *); |
| 1110 | extern void afs_check_for_remote_deletion(struct afs_operation *); |
| 1111 | |
| 1112 | /* |
| 1113 | * dir_edit.c |
| 1114 | */ |
| 1115 | extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *, |
| 1116 | enum afs_edit_dir_reason); |
| 1117 | extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason); |
| 1118 | |
| 1119 | /* |
| 1120 | * dir_silly.c |
| 1121 | */ |
| 1122 | extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *, |
| 1123 | struct dentry *, struct key *); |
| 1124 | extern int afs_silly_iput(struct dentry *, struct inode *); |
| 1125 | |
| 1126 | /* |
| 1127 | * dynroot.c |
| 1128 | */ |
| 1129 | extern const struct inode_operations afs_dynroot_inode_operations; |
| 1130 | extern const struct dentry_operations afs_dynroot_dentry_operations; |
| 1131 | |
| 1132 | extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *); |
| 1133 | extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *); |
| 1134 | extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *); |
| 1135 | extern int afs_dynroot_populate(struct super_block *); |
| 1136 | extern void afs_dynroot_depopulate(struct super_block *); |
| 1137 | |
| 1138 | /* |
| 1139 | * file.c |
| 1140 | */ |
| 1141 | extern const struct address_space_operations afs_file_aops; |
| 1142 | extern const struct address_space_operations afs_symlink_aops; |
| 1143 | extern const struct inode_operations afs_file_inode_operations; |
| 1144 | extern const struct file_operations afs_file_operations; |
| 1145 | extern const struct netfs_request_ops afs_req_ops; |
| 1146 | |
| 1147 | extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *); |
| 1148 | extern void afs_put_wb_key(struct afs_wb_key *); |
| 1149 | extern int afs_open(struct inode *, struct file *); |
| 1150 | extern int afs_release(struct inode *, struct file *); |
| 1151 | extern int afs_fetch_data(struct afs_vnode *, struct afs_read *); |
| 1152 | extern struct afs_read *afs_alloc_read(gfp_t); |
| 1153 | extern void afs_put_read(struct afs_read *); |
| 1154 | extern int afs_write_inode(struct inode *, struct writeback_control *); |
| 1155 | |
| 1156 | static inline struct afs_read *afs_get_read(struct afs_read *req) |
| 1157 | { |
| 1158 | refcount_inc(&req->usage); |
| 1159 | return req; |
| 1160 | } |
| 1161 | |
| 1162 | /* |
| 1163 | * flock.c |
| 1164 | */ |
| 1165 | extern struct workqueue_struct *afs_lock_manager; |
| 1166 | |
| 1167 | extern void afs_lock_op_done(struct afs_call *); |
| 1168 | extern void afs_lock_work(struct work_struct *); |
| 1169 | extern void afs_lock_may_be_available(struct afs_vnode *); |
| 1170 | extern int afs_lock(struct file *, int, struct file_lock *); |
| 1171 | extern int afs_flock(struct file *, int, struct file_lock *); |
| 1172 | |
| 1173 | /* |
| 1174 | * fsclient.c |
| 1175 | */ |
| 1176 | extern void afs_fs_fetch_status(struct afs_operation *); |
| 1177 | extern void afs_fs_fetch_data(struct afs_operation *); |
| 1178 | extern void afs_fs_create_file(struct afs_operation *); |
| 1179 | extern void afs_fs_make_dir(struct afs_operation *); |
| 1180 | extern void afs_fs_remove_file(struct afs_operation *); |
| 1181 | extern void afs_fs_remove_dir(struct afs_operation *); |
| 1182 | extern void afs_fs_link(struct afs_operation *); |
| 1183 | extern void afs_fs_symlink(struct afs_operation *); |
| 1184 | extern void afs_fs_rename(struct afs_operation *); |
| 1185 | extern void afs_fs_store_data(struct afs_operation *); |
| 1186 | extern void afs_fs_setattr(struct afs_operation *); |
| 1187 | extern void afs_fs_get_volume_status(struct afs_operation *); |
| 1188 | extern void afs_fs_set_lock(struct afs_operation *); |
| 1189 | extern void afs_fs_extend_lock(struct afs_operation *); |
| 1190 | extern void afs_fs_release_lock(struct afs_operation *); |
| 1191 | int afs_fs_give_up_all_callbacks(struct afs_net *net, struct afs_server *server, |
| 1192 | struct afs_address *addr, struct key *key); |
| 1193 | bool 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); |
| 1196 | extern void afs_fs_inline_bulk_status(struct afs_operation *); |
| 1197 | |
| 1198 | struct afs_acl { |
| 1199 | u32 size; |
| 1200 | u8 data[]; |
| 1201 | }; |
| 1202 | |
| 1203 | extern void afs_fs_fetch_acl(struct afs_operation *); |
| 1204 | extern void afs_fs_store_acl(struct afs_operation *); |
| 1205 | |
| 1206 | /* |
| 1207 | * fs_operation.c |
| 1208 | */ |
| 1209 | extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *); |
| 1210 | extern int afs_put_operation(struct afs_operation *); |
| 1211 | extern bool afs_begin_vnode_operation(struct afs_operation *); |
| 1212 | extern void afs_wait_for_operation(struct afs_operation *); |
| 1213 | extern int afs_do_sync_operation(struct afs_operation *); |
| 1214 | |
| 1215 | static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n, |
| 1216 | struct afs_vnode *vnode) |
| 1217 | { |
| 1218 | op->file[n].vnode = vnode; |
| 1219 | op->file[n].need_io_lock = true; |
| 1220 | } |
| 1221 | |
| 1222 | static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n, |
| 1223 | const struct afs_fid *fid) |
| 1224 | { |
| 1225 | op->file[n].fid = *fid; |
| 1226 | } |
| 1227 | |
| 1228 | /* |
| 1229 | * fs_probe.c |
| 1230 | */ |
| 1231 | struct afs_endpoint_state *afs_get_endpoint_state(struct afs_endpoint_state *estate, |
| 1232 | enum afs_estate_trace where); |
| 1233 | void afs_put_endpoint_state(struct afs_endpoint_state *estate, enum afs_estate_trace where); |
| 1234 | extern void afs_fileserver_probe_result(struct afs_call *); |
| 1235 | void afs_fs_probe_fileserver(struct afs_net *net, struct afs_server *server, |
| 1236 | struct afs_addr_list *new_addrs, struct key *key); |
| 1237 | extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long); |
| 1238 | extern void afs_probe_fileserver(struct afs_net *, struct afs_server *); |
| 1239 | extern void afs_fs_probe_dispatcher(struct work_struct *); |
| 1240 | int afs_wait_for_one_fs_probe(struct afs_server *server, struct afs_endpoint_state *estate, |
| 1241 | bool is_intr); |
| 1242 | extern void afs_fs_probe_cleanup(struct afs_net *); |
| 1243 | |
| 1244 | /* |
| 1245 | * inode.c |
| 1246 | */ |
| 1247 | extern const struct afs_operation_ops afs_fetch_status_operation; |
| 1248 | |
| 1249 | extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *); |
| 1250 | extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *); |
| 1251 | extern int afs_ilookup5_test_by_fid(struct inode *, void *); |
| 1252 | extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool); |
| 1253 | extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *); |
| 1254 | extern struct inode *afs_root_iget(struct super_block *, struct key *); |
| 1255 | extern int afs_getattr(struct mnt_idmap *idmap, const struct path *, |
| 1256 | struct kstat *, u32, unsigned int); |
| 1257 | extern int afs_setattr(struct mnt_idmap *idmap, struct dentry *, struct iattr *); |
| 1258 | extern void afs_evict_inode(struct inode *); |
| 1259 | extern int afs_drop_inode(struct inode *); |
| 1260 | |
| 1261 | /* |
| 1262 | * main.c |
| 1263 | */ |
| 1264 | extern struct workqueue_struct *afs_wq; |
| 1265 | extern int afs_net_id; |
| 1266 | |
| 1267 | static inline struct afs_net *afs_net(struct net *net) |
| 1268 | { |
| 1269 | return net_generic(net, afs_net_id); |
| 1270 | } |
| 1271 | |
| 1272 | static inline struct afs_net *afs_sb2net(struct super_block *sb) |
| 1273 | { |
| 1274 | return afs_net(AFS_FS_S(sb)->net_ns); |
| 1275 | } |
| 1276 | |
| 1277 | static inline struct afs_net *afs_d2net(struct dentry *dentry) |
| 1278 | { |
| 1279 | return afs_sb2net(dentry->d_sb); |
| 1280 | } |
| 1281 | |
| 1282 | static inline struct afs_net *afs_i2net(struct inode *inode) |
| 1283 | { |
| 1284 | return afs_sb2net(inode->i_sb); |
| 1285 | } |
| 1286 | |
| 1287 | static inline struct afs_net *afs_v2net(struct afs_vnode *vnode) |
| 1288 | { |
| 1289 | return afs_i2net(&vnode->netfs.inode); |
| 1290 | } |
| 1291 | |
| 1292 | static inline struct afs_net *afs_sock2net(struct sock *sk) |
| 1293 | { |
| 1294 | return net_generic(sock_net(sk), afs_net_id); |
| 1295 | } |
| 1296 | |
| 1297 | static inline void __afs_stat(atomic_t *s) |
| 1298 | { |
| 1299 | atomic_inc(s); |
| 1300 | } |
| 1301 | |
| 1302 | #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n) |
| 1303 | |
| 1304 | /* |
| 1305 | * misc.c |
| 1306 | */ |
| 1307 | extern int afs_abort_to_error(u32); |
| 1308 | extern void afs_prioritise_error(struct afs_error *, int, u32); |
| 1309 | |
| 1310 | static inline void afs_op_nomem(struct afs_operation *op) |
| 1311 | { |
| 1312 | op->cumul_error.error = -ENOMEM; |
| 1313 | } |
| 1314 | |
| 1315 | static inline int afs_op_error(const struct afs_operation *op) |
| 1316 | { |
| 1317 | return op->cumul_error.error; |
| 1318 | } |
| 1319 | |
| 1320 | static inline s32 afs_op_abort_code(const struct afs_operation *op) |
| 1321 | { |
| 1322 | return op->cumul_error.abort_code; |
| 1323 | } |
| 1324 | |
| 1325 | static inline int afs_op_set_error(struct afs_operation *op, int error) |
| 1326 | { |
| 1327 | return op->cumul_error.error = error; |
| 1328 | } |
| 1329 | |
| 1330 | static inline void afs_op_accumulate_error(struct afs_operation *op, int error, s32 abort_code) |
| 1331 | { |
| 1332 | afs_prioritise_error(&op->cumul_error, error, abort_code); |
| 1333 | } |
| 1334 | |
| 1335 | /* |
| 1336 | * mntpt.c |
| 1337 | */ |
| 1338 | extern const struct inode_operations afs_mntpt_inode_operations; |
| 1339 | extern const struct inode_operations afs_autocell_inode_operations; |
| 1340 | extern const struct file_operations afs_mntpt_file_operations; |
| 1341 | |
| 1342 | extern struct vfsmount *afs_d_automount(struct path *); |
| 1343 | extern void afs_mntpt_kill_timer(void); |
| 1344 | |
| 1345 | /* |
| 1346 | * proc.c |
| 1347 | */ |
| 1348 | #ifdef CONFIG_PROC_FS |
| 1349 | extern int __net_init afs_proc_init(struct afs_net *); |
| 1350 | extern void __net_exit afs_proc_cleanup(struct afs_net *); |
| 1351 | extern int afs_proc_cell_setup(struct afs_cell *); |
| 1352 | extern void afs_proc_cell_remove(struct afs_cell *); |
| 1353 | extern void afs_put_sysnames(struct afs_sysnames *); |
| 1354 | #else |
| 1355 | static inline int afs_proc_init(struct afs_net *net) { return 0; } |
| 1356 | static inline void afs_proc_cleanup(struct afs_net *net) {} |
| 1357 | static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; } |
| 1358 | static inline void afs_proc_cell_remove(struct afs_cell *cell) {} |
| 1359 | static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {} |
| 1360 | #endif |
| 1361 | |
| 1362 | /* |
| 1363 | * rotate.c |
| 1364 | */ |
| 1365 | extern bool afs_select_fileserver(struct afs_operation *); |
| 1366 | extern void afs_dump_edestaddrreq(const struct afs_operation *); |
| 1367 | |
| 1368 | /* |
| 1369 | * rxrpc.c |
| 1370 | */ |
| 1371 | extern struct workqueue_struct *afs_async_calls; |
| 1372 | |
| 1373 | extern int __net_init afs_open_socket(struct afs_net *); |
| 1374 | extern void __net_exit afs_close_socket(struct afs_net *); |
| 1375 | extern void afs_charge_preallocation(struct work_struct *); |
| 1376 | extern void afs_put_call(struct afs_call *); |
| 1377 | void afs_make_call(struct afs_call *call, gfp_t gfp); |
| 1378 | void afs_wait_for_call_to_complete(struct afs_call *call); |
| 1379 | extern struct afs_call *afs_alloc_flat_call(struct afs_net *, |
| 1380 | const struct afs_call_type *, |
| 1381 | size_t, size_t); |
| 1382 | extern void afs_flat_call_destructor(struct afs_call *); |
| 1383 | extern void afs_send_empty_reply(struct afs_call *); |
| 1384 | extern void afs_send_simple_reply(struct afs_call *, const void *, size_t); |
| 1385 | extern int afs_extract_data(struct afs_call *, bool); |
| 1386 | extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause); |
| 1387 | |
| 1388 | static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call, |
| 1389 | gfp_t gfp) |
| 1390 | { |
| 1391 | struct afs_addr_list *alist = op->estate->addresses; |
| 1392 | |
| 1393 | op->call = call; |
| 1394 | op->type = call->type; |
| 1395 | call->op = op; |
| 1396 | call->key = op->key; |
| 1397 | call->intr = !(op->flags & AFS_OPERATION_UNINTR); |
| 1398 | call->peer = rxrpc_kernel_get_peer(alist->addrs[op->addr_index].peer); |
| 1399 | call->service_id = op->server->service_id; |
| 1400 | afs_make_call(call, gfp); |
| 1401 | } |
| 1402 | |
| 1403 | static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size) |
| 1404 | { |
| 1405 | call->iov_len = size; |
| 1406 | call->kvec[0].iov_base = buf; |
| 1407 | call->kvec[0].iov_len = size; |
| 1408 | iov_iter_kvec(&call->def_iter, ITER_DEST, call->kvec, 1, size); |
| 1409 | } |
| 1410 | |
| 1411 | static inline void afs_extract_to_tmp(struct afs_call *call) |
| 1412 | { |
| 1413 | call->iov_len = sizeof(call->tmp); |
| 1414 | afs_extract_begin(call, &call->tmp, sizeof(call->tmp)); |
| 1415 | } |
| 1416 | |
| 1417 | static inline void afs_extract_to_tmp64(struct afs_call *call) |
| 1418 | { |
| 1419 | call->iov_len = sizeof(call->tmp64); |
| 1420 | afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64)); |
| 1421 | } |
| 1422 | |
| 1423 | static inline void afs_extract_discard(struct afs_call *call, size_t size) |
| 1424 | { |
| 1425 | call->iov_len = size; |
| 1426 | iov_iter_discard(&call->def_iter, ITER_DEST, size); |
| 1427 | } |
| 1428 | |
| 1429 | static inline void afs_extract_to_buf(struct afs_call *call, size_t size) |
| 1430 | { |
| 1431 | call->iov_len = size; |
| 1432 | afs_extract_begin(call, call->buffer, size); |
| 1433 | } |
| 1434 | |
| 1435 | static inline int afs_transfer_reply(struct afs_call *call) |
| 1436 | { |
| 1437 | return afs_extract_data(call, false); |
| 1438 | } |
| 1439 | |
| 1440 | static inline bool afs_check_call_state(struct afs_call *call, |
| 1441 | enum afs_call_state state) |
| 1442 | { |
| 1443 | return READ_ONCE(call->state) == state; |
| 1444 | } |
| 1445 | |
| 1446 | static inline bool afs_set_call_state(struct afs_call *call, |
| 1447 | enum afs_call_state from, |
| 1448 | enum afs_call_state to) |
| 1449 | { |
| 1450 | bool ok = false; |
| 1451 | |
| 1452 | spin_lock_bh(&call->state_lock); |
| 1453 | if (call->state == from) { |
| 1454 | call->state = to; |
| 1455 | trace_afs_call_state(call, from, to, 0, 0); |
| 1456 | ok = true; |
| 1457 | } |
| 1458 | spin_unlock_bh(&call->state_lock); |
| 1459 | return ok; |
| 1460 | } |
| 1461 | |
| 1462 | static inline void afs_set_call_complete(struct afs_call *call, |
| 1463 | int error, u32 remote_abort) |
| 1464 | { |
| 1465 | enum afs_call_state state; |
| 1466 | bool ok = false; |
| 1467 | |
| 1468 | spin_lock_bh(&call->state_lock); |
| 1469 | state = call->state; |
| 1470 | if (state != AFS_CALL_COMPLETE) { |
| 1471 | call->abort_code = remote_abort; |
| 1472 | call->error = error; |
| 1473 | call->state = AFS_CALL_COMPLETE; |
| 1474 | trace_afs_call_state(call, state, AFS_CALL_COMPLETE, |
| 1475 | error, remote_abort); |
| 1476 | ok = true; |
| 1477 | } |
| 1478 | spin_unlock_bh(&call->state_lock); |
| 1479 | if (ok) { |
| 1480 | trace_afs_call_done(call); |
| 1481 | |
| 1482 | /* Asynchronous calls have two refs to release - one from the alloc and |
| 1483 | * one queued with the work item - and we can't just deallocate the |
| 1484 | * call because the work item may be queued again. |
| 1485 | */ |
| 1486 | if (call->drop_ref) |
| 1487 | afs_put_call(call); |
| 1488 | } |
| 1489 | } |
| 1490 | |
| 1491 | /* |
| 1492 | * security.c |
| 1493 | */ |
| 1494 | extern void afs_put_permits(struct afs_permits *); |
| 1495 | extern void afs_clear_permits(struct afs_vnode *); |
| 1496 | extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int, |
| 1497 | struct afs_status_cb *); |
| 1498 | extern struct key *afs_request_key(struct afs_cell *); |
| 1499 | extern struct key *afs_request_key_rcu(struct afs_cell *); |
| 1500 | extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *); |
| 1501 | extern int afs_permission(struct mnt_idmap *, struct inode *, int); |
| 1502 | extern void __exit afs_clean_up_permit_cache(void); |
| 1503 | |
| 1504 | /* |
| 1505 | * server.c |
| 1506 | */ |
| 1507 | extern spinlock_t afs_server_peer_lock; |
| 1508 | |
| 1509 | extern struct afs_server *afs_find_server(struct afs_net *, const struct rxrpc_peer *); |
| 1510 | extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *); |
| 1511 | extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32); |
| 1512 | extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace); |
| 1513 | extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace); |
| 1514 | extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace); |
| 1515 | extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace); |
| 1516 | extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace); |
| 1517 | extern void afs_manage_servers(struct work_struct *); |
| 1518 | extern void afs_servers_timer(struct timer_list *); |
| 1519 | extern void afs_fs_probe_timer(struct timer_list *); |
| 1520 | extern void __net_exit afs_purge_servers(struct afs_net *); |
| 1521 | bool afs_check_server_record(struct afs_operation *op, struct afs_server *server, struct key *key); |
| 1522 | |
| 1523 | static inline void afs_inc_servers_outstanding(struct afs_net *net) |
| 1524 | { |
| 1525 | atomic_inc(&net->servers_outstanding); |
| 1526 | } |
| 1527 | |
| 1528 | static inline void afs_dec_servers_outstanding(struct afs_net *net) |
| 1529 | { |
| 1530 | if (atomic_dec_and_test(&net->servers_outstanding)) |
| 1531 | wake_up_var(&net->servers_outstanding); |
| 1532 | } |
| 1533 | |
| 1534 | static inline bool afs_is_probing_server(struct afs_server *server) |
| 1535 | { |
| 1536 | return list_empty(&server->probe_link); |
| 1537 | } |
| 1538 | |
| 1539 | /* |
| 1540 | * server_list.c |
| 1541 | */ |
| 1542 | static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist) |
| 1543 | { |
| 1544 | refcount_inc(&slist->usage); |
| 1545 | return slist; |
| 1546 | } |
| 1547 | |
| 1548 | extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *); |
| 1549 | struct afs_server_list *afs_alloc_server_list(struct afs_volume *volume, |
| 1550 | struct key *key, |
| 1551 | struct afs_vldb_entry *vldb); |
| 1552 | extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *); |
| 1553 | void afs_attach_volume_to_servers(struct afs_volume *volume, struct afs_server_list *slist); |
| 1554 | void afs_reattach_volume_to_servers(struct afs_volume *volume, struct afs_server_list *slist, |
| 1555 | struct afs_server_list *old); |
| 1556 | void afs_detach_volume_from_servers(struct afs_volume *volume, struct afs_server_list *slist); |
| 1557 | |
| 1558 | /* |
| 1559 | * super.c |
| 1560 | */ |
| 1561 | extern int __init afs_fs_init(void); |
| 1562 | extern void afs_fs_exit(void); |
| 1563 | |
| 1564 | /* |
| 1565 | * validation.c |
| 1566 | */ |
| 1567 | int afs_update_volume_state(struct afs_operation *op); |
| 1568 | bool afs_check_validity(struct afs_vnode *vnode); |
| 1569 | bool afs_pagecache_valid(struct afs_vnode *vnode); |
| 1570 | int afs_validate(struct afs_vnode *vnode, struct key *key); |
| 1571 | |
| 1572 | /* |
| 1573 | * vlclient.c |
| 1574 | */ |
| 1575 | extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *, |
| 1576 | const char *, int); |
| 1577 | extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *); |
| 1578 | struct afs_call *afs_vl_get_capabilities(struct afs_net *net, |
| 1579 | struct afs_addr_list *alist, |
| 1580 | unsigned int addr_index, |
| 1581 | struct key *key, |
| 1582 | struct afs_vlserver *server, |
| 1583 | unsigned int server_index); |
| 1584 | extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *); |
| 1585 | extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *); |
| 1586 | |
| 1587 | /* |
| 1588 | * vl_alias.c |
| 1589 | */ |
| 1590 | extern int afs_cell_detect_alias(struct afs_cell *, struct key *); |
| 1591 | |
| 1592 | /* |
| 1593 | * vl_probe.c |
| 1594 | */ |
| 1595 | extern void afs_vlserver_probe_result(struct afs_call *); |
| 1596 | extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *); |
| 1597 | extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long); |
| 1598 | |
| 1599 | /* |
| 1600 | * vl_rotate.c |
| 1601 | */ |
| 1602 | extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *, |
| 1603 | struct afs_cell *, struct key *); |
| 1604 | extern bool afs_select_vlserver(struct afs_vl_cursor *); |
| 1605 | extern bool afs_select_current_vlserver(struct afs_vl_cursor *); |
| 1606 | extern int afs_end_vlserver_operation(struct afs_vl_cursor *); |
| 1607 | |
| 1608 | /* |
| 1609 | * vlserver_list.c |
| 1610 | */ |
| 1611 | static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver) |
| 1612 | { |
| 1613 | refcount_inc(&vlserver->ref); |
| 1614 | return vlserver; |
| 1615 | } |
| 1616 | |
| 1617 | static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist) |
| 1618 | { |
| 1619 | if (vllist) |
| 1620 | refcount_inc(&vllist->ref); |
| 1621 | return vllist; |
| 1622 | } |
| 1623 | |
| 1624 | extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short); |
| 1625 | extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *); |
| 1626 | extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int); |
| 1627 | extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *); |
| 1628 | extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *, |
| 1629 | const void *, size_t); |
| 1630 | |
| 1631 | /* |
| 1632 | * volume.c |
| 1633 | */ |
| 1634 | extern struct afs_volume *afs_create_volume(struct afs_fs_context *); |
| 1635 | extern int afs_activate_volume(struct afs_volume *); |
| 1636 | extern void afs_deactivate_volume(struct afs_volume *); |
| 1637 | bool afs_try_get_volume(struct afs_volume *volume, enum afs_volume_trace reason); |
| 1638 | extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace); |
| 1639 | void afs_put_volume(struct afs_volume *volume, enum afs_volume_trace reason); |
| 1640 | extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *); |
| 1641 | |
| 1642 | /* |
| 1643 | * write.c |
| 1644 | */ |
| 1645 | #ifdef CONFIG_AFS_FSCACHE |
| 1646 | bool afs_dirty_folio(struct address_space *, struct folio *); |
| 1647 | #else |
| 1648 | #define afs_dirty_folio filemap_dirty_folio |
| 1649 | #endif |
| 1650 | extern int afs_write_begin(struct file *file, struct address_space *mapping, |
| 1651 | loff_t pos, unsigned len, |
| 1652 | struct page **pagep, void **fsdata); |
| 1653 | extern int afs_write_end(struct file *file, struct address_space *mapping, |
| 1654 | loff_t pos, unsigned len, unsigned copied, |
| 1655 | struct page *page, void *fsdata); |
| 1656 | extern int afs_writepage(struct page *, struct writeback_control *); |
| 1657 | extern int afs_writepages(struct address_space *, struct writeback_control *); |
| 1658 | extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *); |
| 1659 | extern int afs_fsync(struct file *, loff_t, loff_t, int); |
| 1660 | extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf); |
| 1661 | extern void afs_prune_wb_keys(struct afs_vnode *); |
| 1662 | int afs_launder_folio(struct folio *); |
| 1663 | |
| 1664 | /* |
| 1665 | * xattr.c |
| 1666 | */ |
| 1667 | extern const struct xattr_handler * const afs_xattr_handlers[]; |
| 1668 | |
| 1669 | /* |
| 1670 | * yfsclient.c |
| 1671 | */ |
| 1672 | extern void yfs_fs_fetch_data(struct afs_operation *); |
| 1673 | extern void yfs_fs_create_file(struct afs_operation *); |
| 1674 | extern void yfs_fs_make_dir(struct afs_operation *); |
| 1675 | extern void yfs_fs_remove_file2(struct afs_operation *); |
| 1676 | extern void yfs_fs_remove_file(struct afs_operation *); |
| 1677 | extern void yfs_fs_remove_dir(struct afs_operation *); |
| 1678 | extern void yfs_fs_link(struct afs_operation *); |
| 1679 | extern void yfs_fs_symlink(struct afs_operation *); |
| 1680 | extern void yfs_fs_rename(struct afs_operation *); |
| 1681 | extern void yfs_fs_store_data(struct afs_operation *); |
| 1682 | extern void yfs_fs_setattr(struct afs_operation *); |
| 1683 | extern void yfs_fs_get_volume_status(struct afs_operation *); |
| 1684 | extern void yfs_fs_set_lock(struct afs_operation *); |
| 1685 | extern void yfs_fs_extend_lock(struct afs_operation *); |
| 1686 | extern void yfs_fs_release_lock(struct afs_operation *); |
| 1687 | extern void yfs_fs_fetch_status(struct afs_operation *); |
| 1688 | extern void yfs_fs_inline_bulk_status(struct afs_operation *); |
| 1689 | |
| 1690 | struct yfs_acl { |
| 1691 | struct afs_acl *acl; /* Dir/file/symlink ACL */ |
| 1692 | struct afs_acl *vol_acl; /* Whole volume ACL */ |
| 1693 | u32 inherit_flag; /* True if ACL is inherited from parent dir */ |
| 1694 | u32 num_cleaned; /* Number of ACEs removed due to subject removal */ |
| 1695 | unsigned int flags; |
| 1696 | #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */ |
| 1697 | #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */ |
| 1698 | }; |
| 1699 | |
| 1700 | extern void yfs_free_opaque_acl(struct yfs_acl *); |
| 1701 | extern void yfs_fs_fetch_opaque_acl(struct afs_operation *); |
| 1702 | extern void yfs_fs_store_opaque_acl2(struct afs_operation *); |
| 1703 | |
| 1704 | /* |
| 1705 | * Miscellaneous inline functions. |
| 1706 | */ |
| 1707 | static inline struct afs_vnode *AFS_FS_I(struct inode *inode) |
| 1708 | { |
| 1709 | return container_of(inode, struct afs_vnode, netfs.inode); |
| 1710 | } |
| 1711 | |
| 1712 | static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode) |
| 1713 | { |
| 1714 | return &vnode->netfs.inode; |
| 1715 | } |
| 1716 | |
| 1717 | /* |
| 1718 | * Note that a dentry got changed. We need to set d_fsdata to the data version |
| 1719 | * number derived from the result of the operation. It doesn't matter if |
| 1720 | * d_fsdata goes backwards as we'll just revalidate. |
| 1721 | */ |
| 1722 | static inline void afs_update_dentry_version(struct afs_operation *op, |
| 1723 | struct afs_vnode_param *dir_vp, |
| 1724 | struct dentry *dentry) |
| 1725 | { |
| 1726 | if (!op->cumul_error.error) |
| 1727 | dentry->d_fsdata = |
| 1728 | (void *)(unsigned long)dir_vp->scb.status.data_version; |
| 1729 | } |
| 1730 | |
| 1731 | /* |
| 1732 | * Set the file size and block count. Estimate the number of 512 bytes blocks |
| 1733 | * used, rounded up to nearest 1K for consistency with other AFS clients. |
| 1734 | */ |
| 1735 | static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size) |
| 1736 | { |
| 1737 | i_size_write(&vnode->netfs.inode, size); |
| 1738 | vnode->netfs.inode.i_blocks = ((size + 1023) >> 10) << 1; |
| 1739 | } |
| 1740 | |
| 1741 | /* |
| 1742 | * Check for a conflicting operation on a directory that we just unlinked from. |
| 1743 | * If someone managed to sneak a link or an unlink in on the file we just |
| 1744 | * unlinked, we won't be able to trust nlink on an AFS file (but not YFS). |
| 1745 | */ |
| 1746 | static inline void afs_check_dir_conflict(struct afs_operation *op, |
| 1747 | struct afs_vnode_param *dvp) |
| 1748 | { |
| 1749 | if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version) |
| 1750 | op->flags |= AFS_OPERATION_DIR_CONFLICT; |
| 1751 | } |
| 1752 | |
| 1753 | static inline int afs_io_error(struct afs_call *call, enum afs_io_error where) |
| 1754 | { |
| 1755 | trace_afs_io_error(call->debug_id, -EIO, where); |
| 1756 | return -EIO; |
| 1757 | } |
| 1758 | |
| 1759 | static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where) |
| 1760 | { |
| 1761 | trace_afs_file_error(vnode, -EIO, where); |
| 1762 | return -EIO; |
| 1763 | } |
| 1764 | |
| 1765 | /*****************************************************************************/ |
| 1766 | /* |
| 1767 | * debug tracing |
| 1768 | */ |
| 1769 | extern unsigned afs_debug; |
| 1770 | |
| 1771 | #define dbgprintk(FMT,...) \ |
| 1772 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
| 1773 | |
| 1774 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| 1775 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
| 1776 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
| 1777 | |
| 1778 | |
| 1779 | #if defined(__KDEBUG) |
| 1780 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) |
| 1781 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) |
| 1782 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) |
| 1783 | |
| 1784 | #elif defined(CONFIG_AFS_DEBUG) |
| 1785 | #define AFS_DEBUG_KENTER 0x01 |
| 1786 | #define AFS_DEBUG_KLEAVE 0x02 |
| 1787 | #define AFS_DEBUG_KDEBUG 0x04 |
| 1788 | |
| 1789 | #define _enter(FMT,...) \ |
| 1790 | do { \ |
| 1791 | if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \ |
| 1792 | kenter(FMT,##__VA_ARGS__); \ |
| 1793 | } while (0) |
| 1794 | |
| 1795 | #define _leave(FMT,...) \ |
| 1796 | do { \ |
| 1797 | if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \ |
| 1798 | kleave(FMT,##__VA_ARGS__); \ |
| 1799 | } while (0) |
| 1800 | |
| 1801 | #define _debug(FMT,...) \ |
| 1802 | do { \ |
| 1803 | if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \ |
| 1804 | kdebug(FMT,##__VA_ARGS__); \ |
| 1805 | } while (0) |
| 1806 | |
| 1807 | #else |
| 1808 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| 1809 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
| 1810 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) |
| 1811 | #endif |
| 1812 | |
| 1813 | /* |
| 1814 | * debug assertion checking |
| 1815 | */ |
| 1816 | #if 1 // defined(__KDEBUGALL) |
| 1817 | |
| 1818 | #define ASSERT(X) \ |
| 1819 | do { \ |
| 1820 | if (unlikely(!(X))) { \ |
| 1821 | printk(KERN_ERR "\n"); \ |
| 1822 | printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| 1823 | BUG(); \ |
| 1824 | } \ |
| 1825 | } while(0) |
| 1826 | |
| 1827 | #define ASSERTCMP(X, OP, Y) \ |
| 1828 | do { \ |
| 1829 | if (unlikely(!((X) OP (Y)))) { \ |
| 1830 | printk(KERN_ERR "\n"); \ |
| 1831 | printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| 1832 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ |
| 1833 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 1834 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ |
| 1835 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 1836 | BUG(); \ |
| 1837 | } \ |
| 1838 | } while(0) |
| 1839 | |
| 1840 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
| 1841 | do { \ |
| 1842 | if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \ |
| 1843 | printk(KERN_ERR "\n"); \ |
| 1844 | printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| 1845 | printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \ |
| 1846 | (unsigned long)(L), (unsigned long)(N), \ |
| 1847 | (unsigned long)(H)); \ |
| 1848 | printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \ |
| 1849 | (unsigned long)(L), (unsigned long)(N), \ |
| 1850 | (unsigned long)(H)); \ |
| 1851 | BUG(); \ |
| 1852 | } \ |
| 1853 | } while(0) |
| 1854 | |
| 1855 | #define ASSERTIF(C, X) \ |
| 1856 | do { \ |
| 1857 | if (unlikely((C) && !(X))) { \ |
| 1858 | printk(KERN_ERR "\n"); \ |
| 1859 | printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| 1860 | BUG(); \ |
| 1861 | } \ |
| 1862 | } while(0) |
| 1863 | |
| 1864 | #define ASSERTIFCMP(C, X, OP, Y) \ |
| 1865 | do { \ |
| 1866 | if (unlikely((C) && !((X) OP (Y)))) { \ |
| 1867 | printk(KERN_ERR "\n"); \ |
| 1868 | printk(KERN_ERR "AFS: Assertion failed\n"); \ |
| 1869 | printk(KERN_ERR "%lu " #OP " %lu is false\n", \ |
| 1870 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 1871 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ |
| 1872 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 1873 | BUG(); \ |
| 1874 | } \ |
| 1875 | } while(0) |
| 1876 | |
| 1877 | #else |
| 1878 | |
| 1879 | #define ASSERT(X) \ |
| 1880 | do { \ |
| 1881 | } while(0) |
| 1882 | |
| 1883 | #define ASSERTCMP(X, OP, Y) \ |
| 1884 | do { \ |
| 1885 | } while(0) |
| 1886 | |
| 1887 | #define ASSERTRANGE(L, OP1, N, OP2, H) \ |
| 1888 | do { \ |
| 1889 | } while(0) |
| 1890 | |
| 1891 | #define ASSERTIF(C, X) \ |
| 1892 | do { \ |
| 1893 | } while(0) |
| 1894 | |
| 1895 | #define ASSERTIFCMP(C, X, OP, Y) \ |
| 1896 | do { \ |
| 1897 | } while(0) |
| 1898 | |
| 1899 | #endif /* __KDEBUGALL */ |