1 /* SPDX-License-Identifier: GPL-2.0-or-later */
4 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
8 #include <linux/compiler.h>
9 #include <linux/kernel.h>
10 #include <linux/ktime.h>
12 #include <linux/pagemap.h>
13 #include <linux/rxrpc.h>
14 #include <linux/key.h>
15 #include <linux/workqueue.h>
16 #include <linux/sched.h>
17 #define FSCACHE_USE_NEW_IO_API
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>
26 #include <net/af_rxrpc.h>
31 #define AFS_CELL_MAX_ADDRS 15
38 * Partial file-locking emulation mode. (The problem being that AFS3 only
39 * allows whole-file locks and no upgrading/downgrading).
43 afs_flock_mode_local, /* Local locking only */
44 afs_flock_mode_openafs, /* Don't get server lock for a partial lock */
45 afs_flock_mode_strict, /* Always get a server lock for a partial lock */
46 afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */
49 struct afs_fs_context {
50 bool force; /* T to force cell type */
51 bool autocell; /* T if set auto mount operation */
52 bool dyn_root; /* T if dynamic root */
53 bool no_cell; /* T if the source is "none" (for dynroot) */
54 enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */
55 afs_voltype_t type; /* type of volume requested */
56 unsigned int volnamesz; /* size of volume name */
57 const char *volname; /* name of volume to mount */
58 struct afs_net *net; /* the AFS net namespace stuff */
59 struct afs_cell *cell; /* cell in which to find volume */
60 struct afs_volume *volume; /* volume record */
61 struct key *key; /* key to use for secure mounting */
65 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */
66 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */
67 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */
68 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */
69 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */
70 AFS_CALL_SV_REPLYING, /* Server: Replying */
71 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */
72 AFS_CALL_COMPLETE, /* Completed or failed */
76 * List of server addresses.
78 struct afs_addr_list {
81 u32 version; /* Version */
82 unsigned char max_addrs;
83 unsigned char nr_addrs;
84 unsigned char preferred; /* Preferred address */
85 unsigned char nr_ipv4; /* Number of IPv4 addresses */
86 enum dns_record_source source:8;
87 enum dns_lookup_status status:8;
88 unsigned long failed; /* Mask of addrs that failed locally/ICMP */
89 unsigned long responded; /* Mask of addrs that responded */
90 struct sockaddr_rxrpc addrs[];
91 #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8))
95 * a record of an in-progress RxRPC call
98 const struct afs_call_type *type; /* type of call */
99 struct afs_addr_list *alist; /* Address is alist[addr_ix] */
100 wait_queue_head_t waitq; /* processes awaiting completion */
101 struct work_struct async_work; /* async I/O processor */
102 struct work_struct work; /* actual work processor */
103 struct rxrpc_call *rxcall; /* RxRPC call handle */
104 struct key *key; /* security for this call */
105 struct afs_net *net; /* The network namespace */
106 struct afs_server *server; /* The fileserver record if fs op (pins ref) */
107 struct afs_vlserver *vlserver; /* The vlserver record if vl op */
108 void *request; /* request data (first part) */
109 size_t iov_len; /* Size of *iter to be used */
110 struct iov_iter def_iter; /* Default buffer/data iterator */
111 struct iov_iter *write_iter; /* Iterator defining write to be made */
112 struct iov_iter *iter; /* Iterator currently in use */
113 union { /* Convenience for ->def_iter */
115 struct bio_vec bvec[1];
117 void *buffer; /* reply receive buffer */
119 long ret0; /* Value to reply with instead of 0 */
120 struct afs_addr_list *ret_alist;
121 struct afs_vldb_entry *ret_vldb;
124 struct afs_operation *op;
125 unsigned int server_index;
127 enum afs_call_state state;
128 spinlock_t state_lock;
129 int error; /* error code */
130 u32 abort_code; /* Remote abort ID or 0 */
131 unsigned int max_lifespan; /* Maximum lifespan to set if not 0 */
132 unsigned request_size; /* size of request data */
133 unsigned reply_max; /* maximum size of reply */
134 unsigned count2; /* count used in unmarshalling */
135 unsigned char unmarshall; /* unmarshalling phase */
136 unsigned char addr_ix; /* Address in ->alist */
137 bool drop_ref; /* T if need to drop ref for incoming call */
138 bool need_attention; /* T if RxRPC poked us */
139 bool async; /* T if asynchronous */
140 bool upgrade; /* T to request service upgrade */
141 bool have_reply_time; /* T if have got reply_time */
142 bool intr; /* T if interruptible */
143 bool unmarshalling_error; /* T if an unmarshalling error occurred */
144 u16 service_id; /* Actual service ID (after upgrade) */
145 unsigned int debug_id; /* Trace ID */
146 u32 operation_ID; /* operation ID for an incoming call */
147 u32 count; /* count for use in unmarshalling */
148 union { /* place to extract temporary data */
152 } __attribute__((packed));
155 ktime_t reply_time; /* Time of first reply packet */
158 struct afs_call_type {
160 unsigned int op; /* Really enum afs_fs_operation */
162 /* deliver request or reply data to an call
163 * - returning an error will cause the call to be aborted
165 int (*deliver)(struct afs_call *call);
167 /* clean up a call */
168 void (*destructor)(struct afs_call *call);
171 void (*work)(struct work_struct *work);
173 /* Call done function (gets called immediately on success or failure) */
174 void (*done)(struct afs_call *call);
178 * Key available for writeback on a file.
183 struct list_head vnode_link; /* Link in vnode->wb_keys */
187 * AFS open file information record. Pointed to by file->private_data.
190 struct key *key; /* The key this file was opened with */
191 struct afs_wb_key *wb; /* Writeback key record for this file */
194 static inline struct key *afs_file_key(struct file *file)
196 struct afs_file *af = file->private_data;
202 * Record of an outstanding read operation on a vnode.
205 loff_t pos; /* Where to start reading */
206 loff_t len; /* How much we're asking for */
207 loff_t actual_len; /* How much we're actually getting */
208 loff_t file_size; /* File size returned by server */
209 struct key *key; /* The key to use to reissue the read */
210 struct afs_vnode *vnode; /* The file being read into. */
211 struct netfs_read_subrequest *subreq; /* Fscache helper read request this belongs to */
212 afs_dataversion_t data_version; /* Version number returned by server */
214 unsigned int call_debug_id;
215 unsigned int nr_pages;
217 void (*done)(struct afs_read *);
218 void (*cleanup)(struct afs_read *);
219 struct iov_iter *iter; /* Iterator representing the buffer */
220 struct iov_iter def_iter; /* Default iterator */
224 * AFS superblock private data
225 * - there's one superblock per volume
227 struct afs_super_info {
228 struct net *net_ns; /* Network namespace */
229 struct afs_cell *cell; /* The cell in which the volume resides */
230 struct afs_volume *volume; /* volume record */
231 enum afs_flock_mode flock_mode:8; /* File locking emulation mode */
232 bool dyn_root; /* True if dynamic root */
235 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
237 return sb->s_fs_info;
240 extern struct file_system_type afs_fs_type;
243 * Set of substitutes for @sys.
245 struct afs_sysnames {
246 #define AFS_NR_SYSNAME 16
247 char *subs[AFS_NR_SYSNAME];
254 * AFS network namespace record.
257 struct net *net; /* Backpointer to the owning net namespace */
258 struct afs_uuid uuid;
259 bool live; /* F if this namespace is being removed */
261 /* AF_RXRPC I/O stuff */
262 struct socket *socket;
263 struct afs_call *spare_incoming_call;
264 struct work_struct charge_preallocation_work;
265 struct mutex socket_mutex;
266 atomic_t nr_outstanding_calls;
267 atomic_t nr_superblocks;
270 struct rb_root cells;
271 struct afs_cell *ws_cell;
272 struct work_struct cells_manager;
273 struct timer_list cells_timer;
274 atomic_t cells_outstanding;
275 struct rw_semaphore cells_lock;
276 struct mutex cells_alias_lock;
278 struct mutex proc_cells_lock;
279 struct hlist_head proc_cells;
281 /* Known servers. Theoretically each fileserver can only be in one
282 * cell, but in practice, people create aliases and subsets and there's
283 * no easy way to distinguish them.
285 seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */
286 struct rb_root fs_servers; /* afs_server (by server UUID or address) */
287 struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */
288 struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */
289 struct hlist_head fs_proc; /* procfs servers list */
291 struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */
292 struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */
293 seqlock_t fs_addr_lock; /* For fs_addresses[46] */
295 struct work_struct fs_manager;
296 struct timer_list fs_timer;
298 struct work_struct fs_prober;
299 struct timer_list fs_probe_timer;
300 atomic_t servers_outstanding;
302 /* File locking renewal management */
303 struct mutex lock_manager_mutex;
306 struct super_block *dynroot_sb; /* Dynamic root mount superblock */
307 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */
308 struct afs_sysnames *sysnames;
309 rwlock_t sysnames_lock;
311 /* Statistics counters */
312 atomic_t n_lookup; /* Number of lookups done */
313 atomic_t n_reval; /* Number of dentries needing revalidation */
314 atomic_t n_inval; /* Number of invalidations by the server */
315 atomic_t n_relpg; /* Number of invalidations by releasepage */
316 atomic_t n_read_dir; /* Number of directory pages read */
317 atomic_t n_dir_cr; /* Number of directory entry creation edits */
318 atomic_t n_dir_rm; /* Number of directory entry removal edits */
319 atomic_t n_stores; /* Number of store ops */
320 atomic_long_t n_store_bytes; /* Number of bytes stored */
321 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */
322 atomic_t n_fetches; /* Number of data fetch ops */
325 extern const char afs_init_sysname[];
327 enum afs_cell_state {
331 AFS_CELL_DEACTIVATING,
340 * This is a tricky concept to get right as it is possible to create aliases
341 * simply by pointing AFSDB/SRV records for two names at the same set of VL
342 * servers; it is also possible to do things like setting up two sets of VL
343 * servers, one of which provides a superset of the volumes provided by the
344 * other (for internal/external division, for example).
346 * Cells only exist in the sense that (a) a cell's name maps to a set of VL
347 * servers and (b) a cell's name is used by the client to select the key to use
348 * for authentication and encryption. The cell name is not typically used in
351 * Two cells are determined to be aliases if they have an explicit alias (YFS
352 * only), share any VL servers in common or have at least one volume in common.
353 * "In common" means that the address list of the VL servers or the fileservers
354 * share at least one endpoint.
359 struct rb_node net_node; /* Node in net->cells */
362 struct afs_cell *alias_of; /* The cell this is an alias of */
363 struct afs_volume *root_volume; /* The root.cell volume if there is one */
364 struct key *anonymous_key; /* anonymous user key for this cell */
365 struct work_struct manager; /* Manager for init/deinit/dns */
366 struct hlist_node proc_link; /* /proc cell list link */
367 #ifdef CONFIG_AFS_FSCACHE
368 struct fscache_cookie *cache; /* caching cookie */
370 time64_t dns_expiry; /* Time AFSDB/SRV record expires */
371 time64_t last_inactive; /* Time of last drop of usage count */
372 atomic_t ref; /* Struct refcount */
373 atomic_t active; /* Active usage counter */
375 #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */
376 #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */
377 #define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */
378 enum afs_cell_state state;
380 enum dns_record_source dns_source:8; /* Latest source of data from lookup */
381 enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */
382 unsigned int dns_lookup_count; /* Counter of DNS lookups */
383 unsigned int debug_id;
385 /* The volumes belonging to this cell */
386 struct rb_root volumes; /* Tree of volumes on this server */
387 struct hlist_head proc_volumes; /* procfs volume list */
388 seqlock_t volume_lock; /* For volumes */
390 /* Active fileserver interaction state. */
391 struct rb_root fs_servers; /* afs_server (by server UUID) */
392 seqlock_t fs_lock; /* For fs_servers */
393 struct rw_semaphore fs_open_mmaps_lock;
394 struct list_head fs_open_mmaps; /* List of vnodes that are mmapped */
395 atomic_t fs_s_break; /* Counter of CB.InitCallBackState messages */
397 /* VL server list. */
398 rwlock_t vl_servers_lock; /* Lock on vl_servers */
399 struct afs_vlserver_list __rcu *vl_servers;
401 u8 name_len; /* Length of name */
402 char *name; /* Cell name, case-flattened and NUL-padded */
406 * Volume Location server record.
408 struct afs_vlserver {
410 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */
412 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */
413 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */
414 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */
415 #define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */
416 rwlock_t lock; /* Lock on addresses */
418 unsigned int rtt; /* Server's current RTT in uS */
421 wait_queue_head_t probe_wq;
422 atomic_t probe_outstanding;
423 spinlock_t probe_lock;
425 unsigned int rtt; /* RTT in uS */
428 unsigned short flags;
429 #define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */
430 #define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */
431 #define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */
432 #define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */
436 u16 name_len; /* Length of name */
437 char name[]; /* Server name, case-flattened */
441 * Weighted list of Volume Location servers.
443 struct afs_vlserver_entry {
444 u16 priority; /* Preference (as SRV) */
445 u16 weight; /* Weight (as SRV) */
446 enum dns_record_source source:8;
447 enum dns_lookup_status status:8;
448 struct afs_vlserver *server;
451 struct afs_vlserver_list {
455 u8 index; /* Server currently in use */
456 u8 preferred; /* Preferred server */
457 enum dns_record_source source:8;
458 enum dns_lookup_status status:8;
460 struct afs_vlserver_entry servers[];
466 * This is pointed to by cell->vldb_entries, indexed by name.
468 struct afs_vldb_entry {
469 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */
472 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */
473 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */
474 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */
475 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */
476 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */
478 uuid_t fs_server[AFS_NMAXNSERVERS];
479 u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */
480 u8 fs_mask[AFS_NMAXNSERVERS];
481 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */
482 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */
483 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */
485 u8 nr_servers; /* Number of server records */
487 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
491 * Record of fileserver with which we're actively communicating.
496 uuid_t uuid; /* Server ID */
497 struct afs_uuid _uuid;
500 struct afs_addr_list __rcu *addresses;
501 struct afs_cell *cell; /* Cell to which belongs (pins ref) */
502 struct rb_node uuid_rb; /* Link in net->fs_servers */
503 struct afs_server __rcu *uuid_next; /* Next server with same UUID */
504 struct afs_server *uuid_prev; /* Previous server with same UUID */
505 struct list_head probe_link; /* Link in net->fs_probe_list */
506 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */
507 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */
508 struct hlist_node proc_link; /* Link in net->fs_proc */
509 struct work_struct initcb_work; /* Work for CB.InitCallBackState* */
510 struct afs_server *gc_next; /* Next server in manager's list */
511 time64_t unuse_time; /* Time at which last unused */
513 #define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */
514 #define AFS_SERVER_FL_UPDATING 1
515 #define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */
516 #define AFS_SERVER_FL_NOT_READY 4 /* The record is not ready for use */
517 #define AFS_SERVER_FL_NOT_FOUND 5 /* VL server says no such server */
518 #define AFS_SERVER_FL_VL_FAIL 6 /* Failed to access VL server */
519 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */
520 #define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */
521 #define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */
522 #define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */
523 #define AFS_SERVER_FL_HAS_FS64 19 /* Fileserver supports FS.{Fetch,Store}Data64 */
524 atomic_t ref; /* Object refcount */
525 atomic_t active; /* Active user count */
526 u32 addr_version; /* Address list version */
527 unsigned int rtt; /* Server's current RTT in uS */
528 unsigned int debug_id; /* Debugging ID for traces */
530 /* file service access */
531 rwlock_t fs_lock; /* access lock */
533 /* callback promise management */
534 unsigned cb_s_break; /* Break-everything counter. */
537 unsigned long probed_at; /* Time last probe was dispatched (jiffies) */
538 wait_queue_head_t probe_wq;
539 atomic_t probe_outstanding;
540 spinlock_t probe_lock;
542 unsigned int rtt; /* RTT in uS */
548 bool local_failure:1;
553 * Replaceable volume server list.
555 struct afs_server_entry {
556 struct afs_server *server;
559 struct afs_server_list {
560 afs_volid_t vids[AFS_MAXTYPES]; /* Volume IDs */
562 unsigned char nr_servers;
563 unsigned char preferred; /* Preferred server */
564 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */
565 unsigned int seq; /* Set to ->servers_seq when installed */
567 struct afs_server_entry servers[];
571 * Live AFS volume management.
576 afs_volid_t vid; /* volume ID */
579 time64_t update_at; /* Time at which to next update */
580 struct afs_cell *cell; /* Cell to which belongs (pins ref) */
581 struct rb_node cell_node; /* Link in cell->volumes */
582 struct hlist_node proc_link; /* Link in cell->proc_volumes */
583 struct super_block __rcu *sb; /* Superblock on which inodes reside */
585 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */
586 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */
587 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */
588 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */
589 #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */
590 #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */
591 #define AFS_VOLUME_MAYBE_NO_IBULK 6 /* - T if some servers don't have InlineBulkStatus */
592 #ifdef CONFIG_AFS_FSCACHE
593 struct fscache_cookie *cache; /* caching cookie */
595 struct afs_server_list __rcu *servers; /* List of servers on which volume resides */
596 rwlock_t servers_lock; /* Lock for ->servers */
597 unsigned int servers_seq; /* Incremented each time ->servers changes */
599 unsigned cb_v_break; /* Break-everything counter. */
600 rwlock_t cb_v_break_lock;
602 afs_voltype_t type; /* type of volume */
603 char type_force; /* force volume type (suppress R/O -> R/W) */
605 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
608 enum afs_lock_state {
609 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */
610 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */
611 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */
612 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */
613 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */
614 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */
615 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */
616 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */
620 * AFS inode private data.
622 * Note that afs_alloc_inode() *must* reset anything that could incorrectly
623 * leak from one inode to another.
626 struct inode vfs_inode; /* the VFS's inode record */
628 struct afs_volume *volume; /* volume on which vnode resides */
629 struct afs_fid fid; /* the file identifier for this inode */
630 struct afs_file_status status; /* AFS status info for this file */
631 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */
632 #ifdef CONFIG_AFS_FSCACHE
633 struct fscache_cookie *cache; /* caching cookie */
635 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */
636 struct mutex io_lock; /* Lock for serialising I/O on this mutex */
637 struct rw_semaphore validate_lock; /* lock for validating this vnode */
638 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */
639 struct key *silly_key; /* Silly rename key */
640 spinlock_t wb_lock; /* lock for wb_keys */
641 spinlock_t lock; /* waitqueue/flags lock */
643 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */
644 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */
645 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */
646 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */
647 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */
648 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */
649 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */
650 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */
651 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */
652 #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */
653 #define AFS_VNODE_MODIFYING 10 /* Set if we're performing a modification op */
655 struct list_head wb_keys; /* List of keys available for writeback */
656 struct list_head pending_locks; /* locks waiting to be granted */
657 struct list_head granted_locks; /* locks granted on this file */
658 struct delayed_work lock_work; /* work to be done in locking */
659 struct key *lock_key; /* Key to be used in lock ops */
660 ktime_t locked_at; /* Time at which lock obtained */
661 enum afs_lock_state lock_state : 8;
662 afs_lock_type_t lock_type : 8;
664 /* outstanding callback notification on this file */
665 struct work_struct cb_work; /* Work for mmap'd files */
666 struct list_head cb_mmap_link; /* Link in cell->fs_open_mmaps */
667 void *cb_server; /* Server with callback/filelock */
668 atomic_t cb_nr_mmap; /* Number of mmaps */
669 unsigned int cb_fs_s_break; /* Mass server break counter (cell->fs_s_break) */
670 unsigned int cb_s_break; /* Mass break counter on ->server */
671 unsigned int cb_v_break; /* Mass break counter on ->volume */
672 unsigned int cb_break; /* Break counter on vnode */
673 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */
675 time64_t cb_expires_at; /* time at which callback expires */
678 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode)
680 #ifdef CONFIG_AFS_FSCACHE
688 * cached security record for one user's attempt to access a vnode
691 struct key *key; /* RxRPC ticket holding a security context */
692 afs_access_t access; /* CallerAccess value for this key */
696 * Immutable cache of CallerAccess records from attempts to access vnodes.
697 * These may be shared between multiple vnodes.
701 struct hlist_node hash_node; /* Link in hash */
702 unsigned long h; /* Hash value for this permit list */
704 unsigned short nr_permits; /* Number of records */
705 bool invalidated; /* Invalidated due to key change */
706 struct afs_permit permits[]; /* List of permits sorted by key pointer */
710 * Error prioritisation and accumulation.
713 short error; /* Accumulated error */
714 bool responded; /* T if server responded */
718 * Cursor for iterating over a server's address list.
720 struct afs_addr_cursor {
721 struct afs_addr_list *alist; /* Current address list (pins ref) */
722 unsigned long tried; /* Tried addresses */
723 signed char index; /* Current address */
724 bool responded; /* T if the current address responded */
725 unsigned short nr_iterations; /* Number of address iterations */
731 * Cursor for iterating over a set of volume location servers.
733 struct afs_vl_cursor {
734 struct afs_addr_cursor ac;
735 struct afs_cell *cell; /* The cell we're querying */
736 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */
737 struct afs_vlserver *server; /* Server on which this resides */
738 struct key *key; /* Key for the server */
739 unsigned long untried; /* Bitmask of untried servers */
740 short index; /* Current server */
742 unsigned short flags;
743 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */
744 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */
745 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */
746 unsigned short nr_iterations; /* Number of server iterations */
750 * Fileserver operation methods.
752 struct afs_operation_ops {
753 void (*issue_afs_rpc)(struct afs_operation *op);
754 void (*issue_yfs_rpc)(struct afs_operation *op);
755 void (*success)(struct afs_operation *op);
756 void (*aborted)(struct afs_operation *op);
757 void (*failed)(struct afs_operation *op);
758 void (*edit_dir)(struct afs_operation *op);
759 void (*put)(struct afs_operation *op);
762 struct afs_vnode_param {
763 struct afs_vnode *vnode;
764 struct afs_fid fid; /* Fid to access */
765 struct afs_status_cb scb; /* Returned status and callback promise */
766 afs_dataversion_t dv_before; /* Data version before the call */
767 unsigned int cb_break_before; /* cb_break + cb_s_break before the call */
768 u8 dv_delta; /* Expected change in data version */
769 bool put_vnode:1; /* T if we have a ref on the vnode */
770 bool need_io_lock:1; /* T if we need the I/O lock on this */
771 bool update_ctime:1; /* Need to update the ctime */
772 bool set_size:1; /* Must update i_size */
773 bool op_unlinked:1; /* True if file was unlinked by op */
774 bool speculative:1; /* T if speculative status fetch (no vnode lock) */
775 bool modification:1; /* Set if the content gets modified */
779 * Fileserver operation wrapper, handling server and address rotation
780 * asynchronously. May make simultaneous calls to multiple servers.
782 struct afs_operation {
783 struct afs_net *net; /* Network namespace */
784 struct key *key; /* Key for the cell */
785 const struct afs_call_type *type; /* Type of call done */
786 const struct afs_operation_ops *ops;
788 /* Parameters/results for the operation */
789 struct afs_volume *volume; /* Volume being accessed */
790 struct afs_vnode_param file[2];
791 struct afs_vnode_param *more_files;
792 struct afs_volsync volsync;
793 struct dentry *dentry; /* Dentry to be altered */
794 struct dentry *dentry_2; /* Second dentry to be altered */
795 struct timespec64 mtime; /* Modification time to record */
796 struct timespec64 ctime; /* Change time to set */
797 short nr_files; /* Number of entries in file[], more_files */
799 unsigned int debug_id;
801 unsigned int cb_v_break; /* Volume break counter before op */
802 unsigned int cb_s_break; /* Server break counter before op */
806 int which; /* Which ->file[] to fetch for */
809 int reason; /* enum afs_edit_dir_reason */
817 struct dentry *rehash;
822 struct afs_read *req;
825 afs_lock_type_t type;
828 struct iov_iter *write_iter;
832 bool laundering; /* Laundering page, PG_writeback not set */
839 struct yfs_acl *yacl;
841 struct afs_volume_status vs;
846 /* Fileserver iteration state */
847 struct afs_addr_cursor ac;
848 struct afs_server_list *server_list; /* Current server list (pins ref) */
849 struct afs_server *server; /* Server we're using (ref pinned by server_list) */
850 struct afs_call *call;
851 unsigned long untried; /* Bitmask of untried servers */
852 short index; /* Current server */
853 unsigned short nr_iterations; /* Number of server iterations */
856 #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */
857 #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */
858 #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */
859 #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */
860 #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */
861 #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */
862 #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */
863 #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */
864 #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */
865 #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */
866 #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */
867 #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */
868 #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */
872 * Cache auxiliary data.
874 struct afs_vnode_cache_aux {
879 * We use page->private to hold the amount of the page that we've written to,
880 * splitting the field into two parts. However, we need to represent a range
881 * 0...PAGE_SIZE, so we reduce the resolution if the size of the page
882 * exceeds what we can encode.
885 #define __AFS_PAGE_PRIV_MASK 0x7fffffffUL
886 #define __AFS_PAGE_PRIV_SHIFT 32
887 #define __AFS_PAGE_PRIV_MMAPPED 0x80000000UL
889 #define __AFS_PAGE_PRIV_MASK 0x7fffUL
890 #define __AFS_PAGE_PRIV_SHIFT 16
891 #define __AFS_PAGE_PRIV_MMAPPED 0x8000UL
894 static inline unsigned int afs_page_dirty_resolution(struct page *page)
896 int shift = thp_order(page) + PAGE_SHIFT - (__AFS_PAGE_PRIV_SHIFT - 1);
897 return (shift > 0) ? shift : 0;
900 static inline size_t afs_page_dirty_from(struct page *page, unsigned long priv)
902 unsigned long x = priv & __AFS_PAGE_PRIV_MASK;
904 /* The lower bound is inclusive */
905 return x << afs_page_dirty_resolution(page);
908 static inline size_t afs_page_dirty_to(struct page *page, unsigned long priv)
910 unsigned long x = (priv >> __AFS_PAGE_PRIV_SHIFT) & __AFS_PAGE_PRIV_MASK;
912 /* The upper bound is immediately beyond the region */
913 return (x + 1) << afs_page_dirty_resolution(page);
916 static inline unsigned long afs_page_dirty(struct page *page, size_t from, size_t to)
918 unsigned int res = afs_page_dirty_resolution(page);
920 to = (to - 1) >> res;
921 return (to << __AFS_PAGE_PRIV_SHIFT) | from;
924 static inline unsigned long afs_page_dirty_mmapped(unsigned long priv)
926 return priv | __AFS_PAGE_PRIV_MMAPPED;
929 static inline bool afs_is_page_dirty_mmapped(unsigned long priv)
931 return priv & __AFS_PAGE_PRIV_MMAPPED;
934 #include <trace/events/afs.h>
936 /*****************************************************************************/
940 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist)
943 refcount_inc(&alist->usage);
946 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int,
949 extern void afs_put_addrlist(struct afs_addr_list *);
950 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *,
951 const char *, size_t, char,
952 unsigned short, unsigned short);
953 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *);
954 extern bool afs_iterate_addresses(struct afs_addr_cursor *);
955 extern int afs_end_cursor(struct afs_addr_cursor *);
957 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16);
958 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16);
963 #ifdef CONFIG_AFS_FSCACHE
964 extern struct fscache_netfs afs_cache_netfs;
965 extern struct fscache_cookie_def afs_cell_cache_index_def;
966 extern struct fscache_cookie_def afs_volume_cache_index_def;
967 extern struct fscache_cookie_def afs_vnode_cache_index_def;
969 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL)
970 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL)
971 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL)
977 extern void afs_invalidate_mmap_work(struct work_struct *);
978 extern void afs_server_init_callback_work(struct work_struct *work);
979 extern void afs_init_callback_state(struct afs_server *);
980 extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason);
981 extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason);
982 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *);
984 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode)
986 return vnode->cb_break + vnode->cb_v_break;
989 static inline bool afs_cb_is_broken(unsigned int cb_break,
990 const struct afs_vnode *vnode)
992 return cb_break != (vnode->cb_break + vnode->volume->cb_v_break);
998 extern int afs_cell_init(struct afs_net *, const char *);
999 extern struct afs_cell *afs_find_cell(struct afs_net *, const char *, unsigned,
1000 enum afs_cell_trace);
1001 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned,
1002 const char *, bool);
1003 extern struct afs_cell *afs_use_cell(struct afs_cell *, enum afs_cell_trace);
1004 extern void afs_unuse_cell(struct afs_net *, struct afs_cell *, enum afs_cell_trace);
1005 extern struct afs_cell *afs_get_cell(struct afs_cell *, enum afs_cell_trace);
1006 extern void afs_see_cell(struct afs_cell *, enum afs_cell_trace);
1007 extern void afs_put_cell(struct afs_cell *, enum afs_cell_trace);
1008 extern void afs_queue_cell(struct afs_cell *, enum afs_cell_trace);
1009 extern void afs_manage_cells(struct work_struct *);
1010 extern void afs_cells_timer(struct timer_list *);
1011 extern void __net_exit afs_cell_purge(struct afs_net *);
1016 extern bool afs_cm_incoming_call(struct afs_call *);
1021 extern const struct file_operations afs_dir_file_operations;
1022 extern const struct inode_operations afs_dir_inode_operations;
1023 extern const struct address_space_operations afs_dir_aops;
1024 extern const struct dentry_operations afs_fs_dentry_operations;
1026 extern void afs_d_release(struct dentry *);
1027 extern void afs_check_for_remote_deletion(struct afs_operation *);
1032 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *,
1033 enum afs_edit_dir_reason);
1034 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason);
1039 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *,
1040 struct dentry *, struct key *);
1041 extern int afs_silly_iput(struct dentry *, struct inode *);
1046 extern const struct inode_operations afs_dynroot_inode_operations;
1047 extern const struct dentry_operations afs_dynroot_dentry_operations;
1049 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *);
1050 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *);
1051 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *);
1052 extern int afs_dynroot_populate(struct super_block *);
1053 extern void afs_dynroot_depopulate(struct super_block *);
1058 extern const struct address_space_operations afs_fs_aops;
1059 extern const struct inode_operations afs_file_inode_operations;
1060 extern const struct file_operations afs_file_operations;
1061 extern const struct netfs_read_request_ops afs_req_ops;
1063 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *);
1064 extern void afs_put_wb_key(struct afs_wb_key *);
1065 extern int afs_open(struct inode *, struct file *);
1066 extern int afs_release(struct inode *, struct file *);
1067 extern int afs_fetch_data(struct afs_vnode *, struct afs_read *);
1068 extern struct afs_read *afs_alloc_read(gfp_t);
1069 extern void afs_put_read(struct afs_read *);
1071 static inline struct afs_read *afs_get_read(struct afs_read *req)
1073 refcount_inc(&req->usage);
1080 extern struct workqueue_struct *afs_lock_manager;
1082 extern void afs_lock_op_done(struct afs_call *);
1083 extern void afs_lock_work(struct work_struct *);
1084 extern void afs_lock_may_be_available(struct afs_vnode *);
1085 extern int afs_lock(struct file *, int, struct file_lock *);
1086 extern int afs_flock(struct file *, int, struct file_lock *);
1091 extern void afs_fs_fetch_status(struct afs_operation *);
1092 extern void afs_fs_fetch_data(struct afs_operation *);
1093 extern void afs_fs_create_file(struct afs_operation *);
1094 extern void afs_fs_make_dir(struct afs_operation *);
1095 extern void afs_fs_remove_file(struct afs_operation *);
1096 extern void afs_fs_remove_dir(struct afs_operation *);
1097 extern void afs_fs_link(struct afs_operation *);
1098 extern void afs_fs_symlink(struct afs_operation *);
1099 extern void afs_fs_rename(struct afs_operation *);
1100 extern void afs_fs_store_data(struct afs_operation *);
1101 extern void afs_fs_setattr(struct afs_operation *);
1102 extern void afs_fs_get_volume_status(struct afs_operation *);
1103 extern void afs_fs_set_lock(struct afs_operation *);
1104 extern void afs_fs_extend_lock(struct afs_operation *);
1105 extern void afs_fs_release_lock(struct afs_operation *);
1106 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *,
1107 struct afs_addr_cursor *, struct key *);
1108 extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
1109 struct afs_addr_cursor *, struct key *);
1110 extern void afs_fs_inline_bulk_status(struct afs_operation *);
1117 extern void afs_fs_fetch_acl(struct afs_operation *);
1118 extern void afs_fs_store_acl(struct afs_operation *);
1123 extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *);
1124 extern int afs_put_operation(struct afs_operation *);
1125 extern bool afs_begin_vnode_operation(struct afs_operation *);
1126 extern void afs_wait_for_operation(struct afs_operation *);
1127 extern int afs_do_sync_operation(struct afs_operation *);
1129 static inline void afs_op_nomem(struct afs_operation *op)
1131 op->error = -ENOMEM;
1134 static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n,
1135 struct afs_vnode *vnode)
1137 op->file[n].vnode = vnode;
1138 op->file[n].need_io_lock = true;
1141 static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n,
1142 const struct afs_fid *fid)
1144 op->file[n].fid = *fid;
1150 extern void afs_fileserver_probe_result(struct afs_call *);
1151 extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool);
1152 extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long);
1153 extern void afs_probe_fileserver(struct afs_net *, struct afs_server *);
1154 extern void afs_fs_probe_dispatcher(struct work_struct *);
1155 extern int afs_wait_for_one_fs_probe(struct afs_server *, bool);
1156 extern void afs_fs_probe_cleanup(struct afs_net *);
1161 extern const struct afs_operation_ops afs_fetch_status_operation;
1163 extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *);
1164 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *);
1165 extern int afs_ilookup5_test_by_fid(struct inode *, void *);
1166 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool);
1167 extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *);
1168 extern struct inode *afs_root_iget(struct super_block *, struct key *);
1169 extern bool afs_check_validity(struct afs_vnode *);
1170 extern int afs_validate(struct afs_vnode *, struct key *);
1171 extern int afs_getattr(struct user_namespace *mnt_userns, const struct path *,
1172 struct kstat *, u32, unsigned int);
1173 extern int afs_setattr(struct user_namespace *mnt_userns, struct dentry *, struct iattr *);
1174 extern void afs_evict_inode(struct inode *);
1175 extern int afs_drop_inode(struct inode *);
1180 extern struct workqueue_struct *afs_wq;
1181 extern int afs_net_id;
1183 static inline struct afs_net *afs_net(struct net *net)
1185 return net_generic(net, afs_net_id);
1188 static inline struct afs_net *afs_sb2net(struct super_block *sb)
1190 return afs_net(AFS_FS_S(sb)->net_ns);
1193 static inline struct afs_net *afs_d2net(struct dentry *dentry)
1195 return afs_sb2net(dentry->d_sb);
1198 static inline struct afs_net *afs_i2net(struct inode *inode)
1200 return afs_sb2net(inode->i_sb);
1203 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
1205 return afs_i2net(&vnode->vfs_inode);
1208 static inline struct afs_net *afs_sock2net(struct sock *sk)
1210 return net_generic(sock_net(sk), afs_net_id);
1213 static inline void __afs_stat(atomic_t *s)
1218 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n)
1223 extern int afs_abort_to_error(u32);
1224 extern void afs_prioritise_error(struct afs_error *, int, u32);
1229 extern const struct inode_operations afs_mntpt_inode_operations;
1230 extern const struct inode_operations afs_autocell_inode_operations;
1231 extern const struct file_operations afs_mntpt_file_operations;
1233 extern struct vfsmount *afs_d_automount(struct path *);
1234 extern void afs_mntpt_kill_timer(void);
1239 #ifdef CONFIG_PROC_FS
1240 extern int __net_init afs_proc_init(struct afs_net *);
1241 extern void __net_exit afs_proc_cleanup(struct afs_net *);
1242 extern int afs_proc_cell_setup(struct afs_cell *);
1243 extern void afs_proc_cell_remove(struct afs_cell *);
1244 extern void afs_put_sysnames(struct afs_sysnames *);
1246 static inline int afs_proc_init(struct afs_net *net) { return 0; }
1247 static inline void afs_proc_cleanup(struct afs_net *net) {}
1248 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; }
1249 static inline void afs_proc_cell_remove(struct afs_cell *cell) {}
1250 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {}
1256 extern bool afs_select_fileserver(struct afs_operation *);
1257 extern void afs_dump_edestaddrreq(const struct afs_operation *);
1262 extern struct workqueue_struct *afs_async_calls;
1264 extern int __net_init afs_open_socket(struct afs_net *);
1265 extern void __net_exit afs_close_socket(struct afs_net *);
1266 extern void afs_charge_preallocation(struct work_struct *);
1267 extern void afs_put_call(struct afs_call *);
1268 extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t);
1269 extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *);
1270 extern struct afs_call *afs_alloc_flat_call(struct afs_net *,
1271 const struct afs_call_type *,
1273 extern void afs_flat_call_destructor(struct afs_call *);
1274 extern void afs_send_empty_reply(struct afs_call *);
1275 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
1276 extern int afs_extract_data(struct afs_call *, bool);
1277 extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause);
1279 static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call,
1283 op->type = call->type;
1285 call->key = op->key;
1286 call->intr = !(op->flags & AFS_OPERATION_UNINTR);
1287 afs_make_call(&op->ac, call, gfp);
1290 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size)
1292 call->iov_len = size;
1293 call->kvec[0].iov_base = buf;
1294 call->kvec[0].iov_len = size;
1295 iov_iter_kvec(&call->def_iter, READ, call->kvec, 1, size);
1298 static inline void afs_extract_to_tmp(struct afs_call *call)
1300 call->iov_len = sizeof(call->tmp);
1301 afs_extract_begin(call, &call->tmp, sizeof(call->tmp));
1304 static inline void afs_extract_to_tmp64(struct afs_call *call)
1306 call->iov_len = sizeof(call->tmp64);
1307 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64));
1310 static inline void afs_extract_discard(struct afs_call *call, size_t size)
1312 call->iov_len = size;
1313 iov_iter_discard(&call->def_iter, READ, size);
1316 static inline void afs_extract_to_buf(struct afs_call *call, size_t size)
1318 call->iov_len = size;
1319 afs_extract_begin(call, call->buffer, size);
1322 static inline int afs_transfer_reply(struct afs_call *call)
1324 return afs_extract_data(call, false);
1327 static inline bool afs_check_call_state(struct afs_call *call,
1328 enum afs_call_state state)
1330 return READ_ONCE(call->state) == state;
1333 static inline bool afs_set_call_state(struct afs_call *call,
1334 enum afs_call_state from,
1335 enum afs_call_state to)
1339 spin_lock_bh(&call->state_lock);
1340 if (call->state == from) {
1342 trace_afs_call_state(call, from, to, 0, 0);
1345 spin_unlock_bh(&call->state_lock);
1349 static inline void afs_set_call_complete(struct afs_call *call,
1350 int error, u32 remote_abort)
1352 enum afs_call_state state;
1355 spin_lock_bh(&call->state_lock);
1356 state = call->state;
1357 if (state != AFS_CALL_COMPLETE) {
1358 call->abort_code = remote_abort;
1359 call->error = error;
1360 call->state = AFS_CALL_COMPLETE;
1361 trace_afs_call_state(call, state, AFS_CALL_COMPLETE,
1362 error, remote_abort);
1365 spin_unlock_bh(&call->state_lock);
1367 trace_afs_call_done(call);
1369 /* Asynchronous calls have two refs to release - one from the alloc and
1370 * one queued with the work item - and we can't just deallocate the
1371 * call because the work item may be queued again.
1381 extern void afs_put_permits(struct afs_permits *);
1382 extern void afs_clear_permits(struct afs_vnode *);
1383 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int,
1384 struct afs_status_cb *);
1385 extern void afs_zap_permits(struct rcu_head *);
1386 extern struct key *afs_request_key(struct afs_cell *);
1387 extern struct key *afs_request_key_rcu(struct afs_cell *);
1388 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *);
1389 extern int afs_permission(struct user_namespace *, struct inode *, int);
1390 extern void __exit afs_clean_up_permit_cache(void);
1395 extern spinlock_t afs_server_peer_lock;
1397 extern struct afs_server *afs_find_server(struct afs_net *,
1398 const struct sockaddr_rxrpc *);
1399 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *);
1400 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32);
1401 extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace);
1402 extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace);
1403 extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace);
1404 extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace);
1405 extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace);
1406 extern void afs_manage_servers(struct work_struct *);
1407 extern void afs_servers_timer(struct timer_list *);
1408 extern void afs_fs_probe_timer(struct timer_list *);
1409 extern void __net_exit afs_purge_servers(struct afs_net *);
1410 extern bool afs_check_server_record(struct afs_operation *, struct afs_server *);
1412 static inline void afs_inc_servers_outstanding(struct afs_net *net)
1414 atomic_inc(&net->servers_outstanding);
1417 static inline void afs_dec_servers_outstanding(struct afs_net *net)
1419 if (atomic_dec_and_test(&net->servers_outstanding))
1420 wake_up_var(&net->servers_outstanding);
1423 static inline bool afs_is_probing_server(struct afs_server *server)
1425 return list_empty(&server->probe_link);
1431 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist)
1433 refcount_inc(&slist->usage);
1437 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *);
1438 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *,
1439 struct afs_vldb_entry *,
1441 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *);
1446 extern int __init afs_fs_init(void);
1447 extern void afs_fs_exit(void);
1452 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *,
1454 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *);
1455 extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *,
1456 struct key *, struct afs_vlserver *, unsigned int);
1457 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *);
1458 extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *);
1463 extern int afs_cell_detect_alias(struct afs_cell *, struct key *);
1468 extern void afs_vlserver_probe_result(struct afs_call *);
1469 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *);
1470 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long);
1475 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *,
1476 struct afs_cell *, struct key *);
1477 extern bool afs_select_vlserver(struct afs_vl_cursor *);
1478 extern bool afs_select_current_vlserver(struct afs_vl_cursor *);
1479 extern int afs_end_vlserver_operation(struct afs_vl_cursor *);
1484 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver)
1486 atomic_inc(&vlserver->usage);
1490 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist)
1493 atomic_inc(&vllist->usage);
1497 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short);
1498 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *);
1499 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int);
1500 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *);
1501 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *,
1502 const void *, size_t);
1507 extern struct afs_volume *afs_create_volume(struct afs_fs_context *);
1508 extern void afs_activate_volume(struct afs_volume *);
1509 extern void afs_deactivate_volume(struct afs_volume *);
1510 extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace);
1511 extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace);
1512 extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *);
1517 extern int afs_set_page_dirty(struct page *);
1518 extern int afs_write_begin(struct file *file, struct address_space *mapping,
1519 loff_t pos, unsigned len, unsigned flags,
1520 struct page **pagep, void **fsdata);
1521 extern int afs_write_end(struct file *file, struct address_space *mapping,
1522 loff_t pos, unsigned len, unsigned copied,
1523 struct page *page, void *fsdata);
1524 extern int afs_writepage(struct page *, struct writeback_control *);
1525 extern int afs_writepages(struct address_space *, struct writeback_control *);
1526 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *);
1527 extern int afs_fsync(struct file *, loff_t, loff_t, int);
1528 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf);
1529 extern void afs_prune_wb_keys(struct afs_vnode *);
1530 extern int afs_launder_page(struct page *);
1535 extern const struct xattr_handler *afs_xattr_handlers[];
1540 extern void yfs_fs_fetch_data(struct afs_operation *);
1541 extern void yfs_fs_create_file(struct afs_operation *);
1542 extern void yfs_fs_make_dir(struct afs_operation *);
1543 extern void yfs_fs_remove_file2(struct afs_operation *);
1544 extern void yfs_fs_remove_file(struct afs_operation *);
1545 extern void yfs_fs_remove_dir(struct afs_operation *);
1546 extern void yfs_fs_link(struct afs_operation *);
1547 extern void yfs_fs_symlink(struct afs_operation *);
1548 extern void yfs_fs_rename(struct afs_operation *);
1549 extern void yfs_fs_store_data(struct afs_operation *);
1550 extern void yfs_fs_setattr(struct afs_operation *);
1551 extern void yfs_fs_get_volume_status(struct afs_operation *);
1552 extern void yfs_fs_set_lock(struct afs_operation *);
1553 extern void yfs_fs_extend_lock(struct afs_operation *);
1554 extern void yfs_fs_release_lock(struct afs_operation *);
1555 extern void yfs_fs_fetch_status(struct afs_operation *);
1556 extern void yfs_fs_inline_bulk_status(struct afs_operation *);
1559 struct afs_acl *acl; /* Dir/file/symlink ACL */
1560 struct afs_acl *vol_acl; /* Whole volume ACL */
1561 u32 inherit_flag; /* True if ACL is inherited from parent dir */
1562 u32 num_cleaned; /* Number of ACEs removed due to subject removal */
1564 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */
1565 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */
1568 extern void yfs_free_opaque_acl(struct yfs_acl *);
1569 extern void yfs_fs_fetch_opaque_acl(struct afs_operation *);
1570 extern void yfs_fs_store_opaque_acl2(struct afs_operation *);
1573 * Miscellaneous inline functions.
1575 static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
1577 return container_of(inode, struct afs_vnode, vfs_inode);
1580 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
1582 return &vnode->vfs_inode;
1586 * Note that a dentry got changed. We need to set d_fsdata to the data version
1587 * number derived from the result of the operation. It doesn't matter if
1588 * d_fsdata goes backwards as we'll just revalidate.
1590 static inline void afs_update_dentry_version(struct afs_operation *op,
1591 struct afs_vnode_param *dir_vp,
1592 struct dentry *dentry)
1596 (void *)(unsigned long)dir_vp->scb.status.data_version;
1600 * Set the file size and block count. Estimate the number of 512 bytes blocks
1601 * used, rounded up to nearest 1K for consistency with other AFS clients.
1603 static inline void afs_set_i_size(struct afs_vnode *vnode, u64 size)
1605 i_size_write(&vnode->vfs_inode, size);
1606 vnode->vfs_inode.i_blocks = ((size + 1023) >> 10) << 1;
1610 * Check for a conflicting operation on a directory that we just unlinked from.
1611 * If someone managed to sneak a link or an unlink in on the file we just
1612 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS).
1614 static inline void afs_check_dir_conflict(struct afs_operation *op,
1615 struct afs_vnode_param *dvp)
1617 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version)
1618 op->flags |= AFS_OPERATION_DIR_CONFLICT;
1621 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where)
1623 trace_afs_io_error(call->debug_id, -EIO, where);
1627 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where)
1629 trace_afs_file_error(vnode, -EIO, where);
1633 /*****************************************************************************/
1637 extern unsigned afs_debug;
1639 #define dbgprintk(FMT,...) \
1640 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1642 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1643 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1644 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1647 #if defined(__KDEBUG)
1648 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1649 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1650 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1652 #elif defined(CONFIG_AFS_DEBUG)
1653 #define AFS_DEBUG_KENTER 0x01
1654 #define AFS_DEBUG_KLEAVE 0x02
1655 #define AFS_DEBUG_KDEBUG 0x04
1657 #define _enter(FMT,...) \
1659 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
1660 kenter(FMT,##__VA_ARGS__); \
1663 #define _leave(FMT,...) \
1665 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
1666 kleave(FMT,##__VA_ARGS__); \
1669 #define _debug(FMT,...) \
1671 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
1672 kdebug(FMT,##__VA_ARGS__); \
1676 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1677 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1678 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1682 * debug assertion checking
1684 #if 1 // defined(__KDEBUGALL)
1688 if (unlikely(!(X))) { \
1689 printk(KERN_ERR "\n"); \
1690 printk(KERN_ERR "AFS: Assertion failed\n"); \
1695 #define ASSERTCMP(X, OP, Y) \
1697 if (unlikely(!((X) OP (Y)))) { \
1698 printk(KERN_ERR "\n"); \
1699 printk(KERN_ERR "AFS: Assertion failed\n"); \
1700 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1701 (unsigned long)(X), (unsigned long)(Y)); \
1702 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1703 (unsigned long)(X), (unsigned long)(Y)); \
1708 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1710 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \
1711 printk(KERN_ERR "\n"); \
1712 printk(KERN_ERR "AFS: Assertion failed\n"); \
1713 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \
1714 (unsigned long)(L), (unsigned long)(N), \
1715 (unsigned long)(H)); \
1716 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
1717 (unsigned long)(L), (unsigned long)(N), \
1718 (unsigned long)(H)); \
1723 #define ASSERTIF(C, X) \
1725 if (unlikely((C) && !(X))) { \
1726 printk(KERN_ERR "\n"); \
1727 printk(KERN_ERR "AFS: Assertion failed\n"); \
1732 #define ASSERTIFCMP(C, X, OP, Y) \
1734 if (unlikely((C) && !((X) OP (Y)))) { \
1735 printk(KERN_ERR "\n"); \
1736 printk(KERN_ERR "AFS: Assertion failed\n"); \
1737 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1738 (unsigned long)(X), (unsigned long)(Y)); \
1739 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1740 (unsigned long)(X), (unsigned long)(Y)); \
1751 #define ASSERTCMP(X, OP, Y) \
1755 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1759 #define ASSERTIF(C, X) \
1763 #define ASSERTIFCMP(C, X, OP, Y) \
1767 #endif /* __KDEBUGALL */