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 #include <linux/fscache.h>
18 #include <linux/backing-dev.h>
19 #include <linux/uuid.h>
20 #include <linux/mm_types.h>
21 #include <linux/dns_resolver.h>
22 #include <net/net_namespace.h>
23 #include <net/netns/generic.h>
25 #include <net/af_rxrpc.h>
30 #define AFS_CELL_MAX_ADDRS 15
36 * Partial file-locking emulation mode. (The problem being that AFS3 only
37 * allows whole-file locks and no upgrading/downgrading).
41 afs_flock_mode_local
, /* Local locking only */
42 afs_flock_mode_openafs
, /* Don't get server lock for a partial lock */
43 afs_flock_mode_strict
, /* Always get a server lock for a partial lock */
44 afs_flock_mode_write
, /* Get an exclusive server lock for a partial lock */
47 struct afs_fs_context
{
48 bool force
; /* T to force cell type */
49 bool autocell
; /* T if set auto mount operation */
50 bool dyn_root
; /* T if dynamic root */
51 bool no_cell
; /* T if the source is "none" (for dynroot) */
52 enum afs_flock_mode flock_mode
; /* Partial file-locking emulation mode */
53 afs_voltype_t type
; /* type of volume requested */
54 unsigned int volnamesz
; /* size of volume name */
55 const char *volname
; /* name of volume to mount */
56 struct afs_net
*net
; /* the AFS net namespace stuff */
57 struct afs_cell
*cell
; /* cell in which to find volume */
58 struct afs_volume
*volume
; /* volume record */
59 struct key
*key
; /* key to use for secure mounting */
62 struct afs_iget_data
{
64 struct afs_volume
*volume
; /* volume on which resides */
65 unsigned int cb_v_break
; /* Pre-fetch volume break count */
66 unsigned int cb_s_break
; /* Pre-fetch server break count */
70 AFS_CALL_CL_REQUESTING
, /* Client: Request is being sent */
71 AFS_CALL_CL_AWAIT_REPLY
, /* Client: Awaiting reply */
72 AFS_CALL_CL_PROC_REPLY
, /* Client: rxrpc call complete; processing reply */
73 AFS_CALL_SV_AWAIT_OP_ID
, /* Server: Awaiting op ID */
74 AFS_CALL_SV_AWAIT_REQUEST
, /* Server: Awaiting request data */
75 AFS_CALL_SV_REPLYING
, /* Server: Replying */
76 AFS_CALL_SV_AWAIT_ACK
, /* Server: Awaiting final ACK */
77 AFS_CALL_COMPLETE
, /* Completed or failed */
81 * List of server addresses.
83 struct afs_addr_list
{
84 struct rcu_head rcu
; /* Must be first */
86 u32 version
; /* Version */
87 unsigned char max_addrs
;
88 unsigned char nr_addrs
;
89 unsigned char preferred
; /* Preferred address */
90 unsigned char nr_ipv4
; /* Number of IPv4 addresses */
91 enum dns_record_source source
:8;
92 enum dns_lookup_status status
:8;
93 unsigned long probed
; /* Mask of servers that have been probed */
94 unsigned long failed
; /* Mask of addrs that failed locally/ICMP */
95 unsigned long responded
; /* Mask of addrs that responded */
96 struct sockaddr_rxrpc addrs
[];
97 #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8))
101 * a record of an in-progress RxRPC call
104 const struct afs_call_type
*type
; /* type of call */
105 struct afs_addr_list
*alist
; /* Address is alist[addr_ix] */
106 wait_queue_head_t waitq
; /* processes awaiting completion */
107 struct work_struct async_work
; /* async I/O processor */
108 struct work_struct work
; /* actual work processor */
109 struct rxrpc_call
*rxcall
; /* RxRPC call handle */
110 struct key
*key
; /* security for this call */
111 struct afs_net
*net
; /* The network namespace */
113 struct afs_server
*server
;
114 struct afs_vlserver
*vlserver
;
116 struct afs_cb_interest
*cbi
; /* Callback interest for server used */
117 struct afs_vnode
*lvnode
; /* vnode being locked */
118 void *request
; /* request data (first part) */
119 struct address_space
*mapping
; /* Pages being written from */
120 struct iov_iter iter
; /* Buffer iterator */
121 struct iov_iter
*_iter
; /* Iterator currently in use */
122 union { /* Convenience for ->iter */
124 struct bio_vec bvec
[1];
126 void *buffer
; /* reply receive buffer */
128 long ret0
; /* Value to reply with instead of 0 */
129 struct afs_addr_list
*ret_alist
;
130 struct afs_vldb_entry
*ret_vldb
;
131 struct afs_acl
*ret_acl
;
133 struct afs_fid
*out_fid
;
134 struct afs_status_cb
*out_dir_scb
;
135 struct afs_status_cb
*out_scb
;
136 struct yfs_acl
*out_yacl
;
137 struct afs_volsync
*out_volsync
;
138 struct afs_volume_status
*out_volstatus
;
139 struct afs_read
*read_request
;
140 unsigned int server_index
;
141 pgoff_t first
; /* first page in mapping to deal with */
142 pgoff_t last
; /* last page in mapping to deal with */
144 enum afs_call_state state
;
145 spinlock_t state_lock
;
146 int error
; /* error code */
147 u32 abort_code
; /* Remote abort ID or 0 */
149 unsigned int max_lifespan
; /* Maximum lifespan to set if not 0 */
150 unsigned request_size
; /* size of request data */
151 unsigned reply_max
; /* maximum size of reply */
152 unsigned first_offset
; /* offset into mapping[first] */
154 unsigned last_to
; /* amount of mapping[last] */
155 unsigned count2
; /* count used in unmarshalling */
157 unsigned char unmarshall
; /* unmarshalling phase */
158 unsigned char addr_ix
; /* Address in ->alist */
159 bool incoming
; /* T if incoming call */
160 bool send_pages
; /* T if data from mapping should be sent */
161 bool need_attention
; /* T if RxRPC poked us */
162 bool async
; /* T if asynchronous */
163 bool upgrade
; /* T to request service upgrade */
164 bool have_reply_time
; /* T if have got reply_time */
165 bool intr
; /* T if interruptible */
166 u16 service_id
; /* Actual service ID (after upgrade) */
167 unsigned int debug_id
; /* Trace ID */
168 u32 operation_ID
; /* operation ID for an incoming call */
169 u32 count
; /* count for use in unmarshalling */
170 union { /* place to extract temporary data */
174 } __attribute__((packed
));
177 ktime_t reply_time
; /* Time of first reply packet */
180 struct afs_call_type
{
182 unsigned int op
; /* Really enum afs_fs_operation */
184 /* deliver request or reply data to an call
185 * - returning an error will cause the call to be aborted
187 int (*deliver
)(struct afs_call
*call
);
189 /* clean up a call */
190 void (*destructor
)(struct afs_call
*call
);
193 void (*work
)(struct work_struct
*work
);
195 /* Call done function (gets called immediately on success or failure) */
196 void (*done
)(struct afs_call
*call
);
200 * Key available for writeback on a file.
205 struct list_head vnode_link
; /* Link in vnode->wb_keys */
209 * AFS open file information record. Pointed to by file->private_data.
212 struct key
*key
; /* The key this file was opened with */
213 struct afs_wb_key
*wb
; /* Writeback key record for this file */
216 static inline struct key
*afs_file_key(struct file
*file
)
218 struct afs_file
*af
= file
->private_data
;
224 * Record of an outstanding read operation on a vnode.
227 loff_t pos
; /* Where to start reading */
228 loff_t len
; /* How much we're asking for */
229 loff_t actual_len
; /* How much we're actually getting */
230 loff_t remain
; /* Amount remaining */
231 loff_t file_size
; /* File size returned by server */
232 afs_dataversion_t data_version
; /* Version number returned by server */
234 unsigned int index
; /* Which page we're reading into */
235 unsigned int nr_pages
;
236 unsigned int offset
; /* offset into current page */
237 struct afs_vnode
*vnode
;
238 void (*page_done
)(struct afs_read
*);
240 struct page
*array
[];
244 * AFS superblock private data
245 * - there's one superblock per volume
247 struct afs_super_info
{
248 struct net
*net_ns
; /* Network namespace */
249 struct afs_cell
*cell
; /* The cell in which the volume resides */
250 struct afs_volume
*volume
; /* volume record */
251 enum afs_flock_mode flock_mode
:8; /* File locking emulation mode */
252 bool dyn_root
; /* True if dynamic root */
255 static inline struct afs_super_info
*AFS_FS_S(struct super_block
*sb
)
257 return sb
->s_fs_info
;
260 extern struct file_system_type afs_fs_type
;
263 * Set of substitutes for @sys.
265 struct afs_sysnames
{
266 #define AFS_NR_SYSNAME 16
267 char *subs
[AFS_NR_SYSNAME
];
274 * AFS network namespace record.
277 struct net
*net
; /* Backpointer to the owning net namespace */
278 struct afs_uuid uuid
;
279 bool live
; /* F if this namespace is being removed */
281 /* AF_RXRPC I/O stuff */
282 struct socket
*socket
;
283 struct afs_call
*spare_incoming_call
;
284 struct work_struct charge_preallocation_work
;
285 struct mutex socket_mutex
;
286 atomic_t nr_outstanding_calls
;
287 atomic_t nr_superblocks
;
290 struct rb_root cells
;
291 struct afs_cell __rcu
*ws_cell
;
292 struct work_struct cells_manager
;
293 struct timer_list cells_timer
;
294 atomic_t cells_outstanding
;
295 seqlock_t cells_lock
;
297 struct mutex proc_cells_lock
;
298 struct hlist_head proc_cells
;
300 /* Known servers. Theoretically each fileserver can only be in one
301 * cell, but in practice, people create aliases and subsets and there's
302 * no easy way to distinguish them.
304 seqlock_t fs_lock
; /* For fs_servers */
305 struct rb_root fs_servers
; /* afs_server (by server UUID or address) */
306 struct list_head fs_updates
; /* afs_server (by update_at) */
307 struct hlist_head fs_proc
; /* procfs servers list */
309 struct hlist_head fs_addresses4
; /* afs_server (by lowest IPv4 addr) */
310 struct hlist_head fs_addresses6
; /* afs_server (by lowest IPv6 addr) */
311 seqlock_t fs_addr_lock
; /* For fs_addresses[46] */
313 struct work_struct fs_manager
;
314 struct timer_list fs_timer
;
315 atomic_t servers_outstanding
;
317 /* File locking renewal management */
318 struct mutex lock_manager_mutex
;
321 struct super_block
*dynroot_sb
; /* Dynamic root mount superblock */
322 struct proc_dir_entry
*proc_afs
; /* /proc/net/afs directory */
323 struct afs_sysnames
*sysnames
;
324 rwlock_t sysnames_lock
;
326 /* Statistics counters */
327 atomic_t n_lookup
; /* Number of lookups done */
328 atomic_t n_reval
; /* Number of dentries needing revalidation */
329 atomic_t n_inval
; /* Number of invalidations by the server */
330 atomic_t n_relpg
; /* Number of invalidations by releasepage */
331 atomic_t n_read_dir
; /* Number of directory pages read */
332 atomic_t n_dir_cr
; /* Number of directory entry creation edits */
333 atomic_t n_dir_rm
; /* Number of directory entry removal edits */
334 atomic_t n_stores
; /* Number of store ops */
335 atomic_long_t n_store_bytes
; /* Number of bytes stored */
336 atomic_long_t n_fetch_bytes
; /* Number of bytes fetched */
337 atomic_t n_fetches
; /* Number of data fetch ops */
340 extern const char afs_init_sysname
[];
342 enum afs_cell_state
{
346 AFS_CELL_DEACTIVATING
,
354 * This is a tricky concept to get right as it is possible to create aliases
355 * simply by pointing AFSDB/SRV records for two names at the same set of VL
356 * servers; it is also possible to do things like setting up two sets of VL
357 * servers, one of which provides a superset of the volumes provided by the
358 * other (for internal/external division, for example).
360 * Cells only exist in the sense that (a) a cell's name maps to a set of VL
361 * servers and (b) a cell's name is used by the client to select the key to use
362 * for authentication and encryption. The cell name is not typically used in
365 * There is no easy way to determine if two cells are aliases or one is a
371 struct rb_node net_node
; /* Node in net->cells */
374 struct key
*anonymous_key
; /* anonymous user key for this cell */
375 struct work_struct manager
; /* Manager for init/deinit/dns */
376 struct hlist_node proc_link
; /* /proc cell list link */
377 #ifdef CONFIG_AFS_FSCACHE
378 struct fscache_cookie
*cache
; /* caching cookie */
380 time64_t dns_expiry
; /* Time AFSDB/SRV record expires */
381 time64_t last_inactive
; /* Time of last drop of usage count */
384 #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */
385 #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */
386 enum afs_cell_state state
;
388 enum dns_record_source dns_source
:8; /* Latest source of data from lookup */
389 enum dns_lookup_status dns_status
:8; /* Latest status of data from lookup */
390 unsigned int dns_lookup_count
; /* Counter of DNS lookups */
392 /* Active fileserver interaction state. */
393 struct list_head proc_volumes
; /* procfs volume list */
396 /* VL server list. */
397 rwlock_t vl_servers_lock
; /* Lock on vl_servers */
398 struct afs_vlserver_list __rcu
*vl_servers
;
400 u8 name_len
; /* Length of name */
401 char name
[64 + 1]; /* Cell name, case-flattened and NUL-padded */
405 * Volume Location server record.
407 struct afs_vlserver
{
409 struct afs_addr_list __rcu
*addresses
; /* List of addresses for this VL server */
411 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */
412 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */
413 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */
414 rwlock_t lock
; /* Lock on addresses */
418 wait_queue_head_t probe_wq
;
419 atomic_t probe_outstanding
;
420 spinlock_t probe_lock
;
422 unsigned int rtt
; /* RTT as ktime/64 */
429 bool local_failure
:1;
433 u16 name_len
; /* Length of name */
434 char name
[]; /* Server name, case-flattened */
438 * Weighted list of Volume Location servers.
440 struct afs_vlserver_entry
{
441 u16 priority
; /* Preference (as SRV) */
442 u16 weight
; /* Weight (as SRV) */
443 enum dns_record_source source
:8;
444 enum dns_lookup_status status
:8;
445 struct afs_vlserver
*server
;
448 struct afs_vlserver_list
{
452 u8 index
; /* Server currently in use */
453 u8 preferred
; /* Preferred server */
454 enum dns_record_source source
:8;
455 enum dns_lookup_status status
:8;
457 struct afs_vlserver_entry servers
[];
463 * This is pointed to by cell->vldb_entries, indexed by name.
465 struct afs_vldb_entry
{
466 afs_volid_t vid
[3]; /* Volume IDs for R/W, R/O and Bak volumes */
469 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */
470 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */
471 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */
472 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */
473 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */
475 uuid_t fs_server
[AFS_NMAXNSERVERS
];
476 u8 fs_mask
[AFS_NMAXNSERVERS
];
477 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */
478 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */
479 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */
481 u8 nr_servers
; /* Number of server records */
483 u8 name
[AFS_MAXVOLNAME
+ 1]; /* NUL-padded volume name */
487 * Record of fileserver with which we're actively communicating.
492 uuid_t uuid
; /* Server ID */
493 struct afs_uuid _uuid
;
496 struct afs_addr_list __rcu
*addresses
;
497 struct rb_node uuid_rb
; /* Link in net->servers */
498 struct hlist_node addr4_link
; /* Link in net->fs_addresses4 */
499 struct hlist_node addr6_link
; /* Link in net->fs_addresses6 */
500 struct hlist_node proc_link
; /* Link in net->fs_proc */
501 struct afs_server
*gc_next
; /* Next server in manager's list */
502 time64_t put_time
; /* Time at which last put */
503 time64_t update_at
; /* Time at which to next update the record */
505 #define AFS_SERVER_FL_NOT_READY 1 /* The record is not ready for use */
506 #define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */
507 #define AFS_SERVER_FL_VL_FAIL 3 /* Failed to access VL server */
508 #define AFS_SERVER_FL_UPDATING 4
509 #define AFS_SERVER_FL_PROBED 5 /* The fileserver has been probed */
510 #define AFS_SERVER_FL_PROBING 6 /* Fileserver is being probed */
511 #define AFS_SERVER_FL_NO_IBULK 7 /* Fileserver doesn't support FS.InlineBulkStatus */
512 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */
513 #define AFS_SERVER_FL_IS_YFS 9 /* Server is YFS not AFS */
514 #define AFS_SERVER_FL_NO_RM2 10 /* Fileserver doesn't support YFS.RemoveFile2 */
515 #define AFS_SERVER_FL_HAVE_EPOCH 11 /* ->epoch is valid */
517 u32 addr_version
; /* Address list version */
518 u32 cm_epoch
; /* Server RxRPC epoch */
520 /* file service access */
521 rwlock_t fs_lock
; /* access lock */
523 /* callback promise management */
524 struct hlist_head cb_volumes
; /* List of volume interests on this server */
525 unsigned cb_s_break
; /* Break-everything counter. */
526 rwlock_t cb_break_lock
; /* Volume finding lock */
529 wait_queue_head_t probe_wq
;
530 atomic_t probe_outstanding
;
531 spinlock_t probe_lock
;
533 unsigned int rtt
; /* RTT as ktime/64 */
541 bool local_failure
:1;
544 bool said_rebooted
:1;
545 bool said_inconsistent
:1;
550 * Volume collation in the server's callback interest list.
552 struct afs_vol_interest
{
553 struct hlist_node srv_link
; /* Link in server->cb_volumes */
554 struct hlist_head cb_interests
; /* List of callback interests on the server */
557 afs_volid_t vid
; /* Volume ID to match */
563 * Interest by a superblock on a server.
565 struct afs_cb_interest
{
566 struct hlist_node cb_vlink
; /* Link in vol_interest->cb_interests */
567 struct afs_vol_interest
*vol_interest
;
568 struct afs_server
*server
; /* Server on which this interest resides */
569 struct super_block
*sb
; /* Superblock on which inodes reside */
572 afs_volid_t vid
; /* Volume ID to match */
578 * Replaceable server list.
580 struct afs_server_entry
{
581 struct afs_server
*server
;
582 struct afs_cb_interest
*cb_interest
;
585 struct afs_server_list
{
587 unsigned char nr_servers
;
588 unsigned char preferred
; /* Preferred server */
589 unsigned short vnovol_mask
; /* Servers to be skipped due to VNOVOL */
590 unsigned int seq
; /* Set to ->servers_seq when installed */
592 struct afs_server_entry servers
[];
596 * Live AFS volume management.
599 afs_volid_t vid
; /* volume ID */
601 time64_t update_at
; /* Time at which to next update */
602 struct afs_cell
*cell
; /* Cell to which belongs (pins ref) */
603 struct list_head proc_link
; /* Link in cell->vl_proc */
605 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */
606 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */
607 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */
608 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */
609 #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */
610 #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */
611 #ifdef CONFIG_AFS_FSCACHE
612 struct fscache_cookie
*cache
; /* caching cookie */
614 struct afs_server_list
*servers
; /* List of servers on which volume resides */
615 rwlock_t servers_lock
; /* Lock for ->servers */
616 unsigned int servers_seq
; /* Incremented each time ->servers changes */
618 unsigned cb_v_break
; /* Break-everything counter. */
619 rwlock_t cb_break_lock
;
621 afs_voltype_t type
; /* type of volume */
623 char type_force
; /* force volume type (suppress R/O -> R/W) */
625 u8 name
[AFS_MAXVOLNAME
+ 1]; /* NUL-padded volume name */
628 enum afs_lock_state
{
629 AFS_VNODE_LOCK_NONE
, /* The vnode has no lock on the server */
630 AFS_VNODE_LOCK_WAITING_FOR_CB
, /* We're waiting for the server to break the callback */
631 AFS_VNODE_LOCK_SETTING
, /* We're asking the server for a lock */
632 AFS_VNODE_LOCK_GRANTED
, /* We have a lock on the server */
633 AFS_VNODE_LOCK_EXTENDING
, /* We're extending a lock on the server */
634 AFS_VNODE_LOCK_NEED_UNLOCK
, /* We need to unlock on the server */
635 AFS_VNODE_LOCK_UNLOCKING
, /* We're telling the server to unlock */
636 AFS_VNODE_LOCK_DELETED
, /* The vnode has been deleted whilst we have a lock */
640 * AFS inode private data.
642 * Note that afs_alloc_inode() *must* reset anything that could incorrectly
643 * leak from one inode to another.
646 struct inode vfs_inode
; /* the VFS's inode record */
648 struct afs_volume
*volume
; /* volume on which vnode resides */
649 struct afs_fid fid
; /* the file identifier for this inode */
650 struct afs_file_status status
; /* AFS status info for this file */
651 afs_dataversion_t invalid_before
; /* Child dentries are invalid before this */
652 #ifdef CONFIG_AFS_FSCACHE
653 struct fscache_cookie
*cache
; /* caching cookie */
655 struct afs_permits __rcu
*permit_cache
; /* cache of permits so far obtained */
656 struct mutex io_lock
; /* Lock for serialising I/O on this mutex */
657 struct rw_semaphore validate_lock
; /* lock for validating this vnode */
658 struct rw_semaphore rmdir_lock
; /* Lock for rmdir vs sillyrename */
659 struct key
*silly_key
; /* Silly rename key */
660 spinlock_t wb_lock
; /* lock for wb_keys */
661 spinlock_t lock
; /* waitqueue/flags lock */
663 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */
664 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */
665 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */
666 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */
667 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */
668 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */
669 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */
670 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */
671 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */
673 struct list_head wb_keys
; /* List of keys available for writeback */
674 struct list_head pending_locks
; /* locks waiting to be granted */
675 struct list_head granted_locks
; /* locks granted on this file */
676 struct delayed_work lock_work
; /* work to be done in locking */
677 struct key
*lock_key
; /* Key to be used in lock ops */
678 ktime_t locked_at
; /* Time at which lock obtained */
679 enum afs_lock_state lock_state
: 8;
680 afs_lock_type_t lock_type
: 8;
682 /* outstanding callback notification on this file */
683 struct afs_cb_interest __rcu
*cb_interest
; /* Server on which this resides */
684 unsigned int cb_s_break
; /* Mass break counter on ->server */
685 unsigned int cb_v_break
; /* Mass break counter on ->volume */
686 unsigned int cb_break
; /* Break counter on vnode */
687 seqlock_t cb_lock
; /* Lock for ->cb_interest, ->status, ->cb_*break */
689 time64_t cb_expires_at
; /* time at which callback expires */
692 static inline struct fscache_cookie
*afs_vnode_cache(struct afs_vnode
*vnode
)
694 #ifdef CONFIG_AFS_FSCACHE
702 * cached security record for one user's attempt to access a vnode
705 struct key
*key
; /* RxRPC ticket holding a security context */
706 afs_access_t access
; /* CallerAccess value for this key */
710 * Immutable cache of CallerAccess records from attempts to access vnodes.
711 * These may be shared between multiple vnodes.
715 struct hlist_node hash_node
; /* Link in hash */
716 unsigned long h
; /* Hash value for this permit list */
718 unsigned short nr_permits
; /* Number of records */
719 bool invalidated
; /* Invalidated due to key change */
720 struct afs_permit permits
[]; /* List of permits sorted by key pointer */
724 * record of one of a system's set of network interfaces
726 struct afs_interface
{
727 struct in_addr address
; /* IPv4 address bound to interface */
728 struct in_addr netmask
; /* netmask applied to address */
729 unsigned mtu
; /* MTU of interface */
733 * Error prioritisation and accumulation.
736 short error
; /* Accumulated error */
737 bool responded
; /* T if server responded */
741 * Cursor for iterating over a server's address list.
743 struct afs_addr_cursor
{
744 struct afs_addr_list
*alist
; /* Current address list (pins ref) */
745 unsigned long tried
; /* Tried addresses */
746 signed char index
; /* Current address */
747 bool responded
; /* T if the current address responded */
748 unsigned short nr_iterations
; /* Number of address iterations */
754 * Cursor for iterating over a set of volume location servers.
756 struct afs_vl_cursor
{
757 struct afs_addr_cursor ac
;
758 struct afs_cell
*cell
; /* The cell we're querying */
759 struct afs_vlserver_list
*server_list
; /* Current server list (pins ref) */
760 struct afs_vlserver
*server
; /* Server on which this resides */
761 struct key
*key
; /* Key for the server */
762 unsigned long untried
; /* Bitmask of untried servers */
763 short index
; /* Current server */
765 unsigned short flags
;
766 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */
767 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */
768 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */
769 unsigned short nr_iterations
; /* Number of server iterations */
773 * Cursor for iterating over a set of fileservers.
775 struct afs_fs_cursor
{
776 const struct afs_call_type
*type
; /* Type of call done */
777 struct afs_addr_cursor ac
;
778 struct afs_vnode
*vnode
;
779 struct afs_server_list
*server_list
; /* Current server list (pins ref) */
780 struct afs_cb_interest
*cbi
; /* Server on which this resides (pins ref) */
781 struct key
*key
; /* Key for the server */
782 unsigned long untried
; /* Bitmask of untried servers */
783 unsigned int cb_break
; /* cb_break + cb_s_break before the call */
784 unsigned int cb_break_2
; /* cb_break + cb_s_break (2nd vnode) */
785 short index
; /* Current server */
787 unsigned short flags
;
788 #define AFS_FS_CURSOR_STOP 0x0001 /* Set to cease iteration */
789 #define AFS_FS_CURSOR_VBUSY 0x0002 /* Set if seen VBUSY */
790 #define AFS_FS_CURSOR_VMOVED 0x0004 /* Set if seen VMOVED */
791 #define AFS_FS_CURSOR_VNOVOL 0x0008 /* Set if seen VNOVOL */
792 #define AFS_FS_CURSOR_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */
793 #define AFS_FS_CURSOR_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */
794 #define AFS_FS_CURSOR_INTR 0x0040 /* Set if op is interruptible */
795 unsigned short nr_iterations
; /* Number of server iterations */
799 * Cache auxiliary data.
801 struct afs_vnode_cache_aux
{
805 #include <trace/events/afs.h>
807 /*****************************************************************************/
811 static inline struct afs_addr_list
*afs_get_addrlist(struct afs_addr_list
*alist
)
814 refcount_inc(&alist
->usage
);
817 extern struct afs_addr_list
*afs_alloc_addrlist(unsigned int,
820 extern void afs_put_addrlist(struct afs_addr_list
*);
821 extern struct afs_vlserver_list
*afs_parse_text_addrs(struct afs_net
*,
822 const char *, size_t, char,
823 unsigned short, unsigned short);
824 extern struct afs_vlserver_list
*afs_dns_query(struct afs_cell
*, time64_t
*);
825 extern bool afs_iterate_addresses(struct afs_addr_cursor
*);
826 extern int afs_end_cursor(struct afs_addr_cursor
*);
828 extern void afs_merge_fs_addr4(struct afs_addr_list
*, __be32
, u16
);
829 extern void afs_merge_fs_addr6(struct afs_addr_list
*, __be32
*, u16
);
834 #ifdef CONFIG_AFS_FSCACHE
835 extern struct fscache_netfs afs_cache_netfs
;
836 extern struct fscache_cookie_def afs_cell_cache_index_def
;
837 extern struct fscache_cookie_def afs_volume_cache_index_def
;
838 extern struct fscache_cookie_def afs_vnode_cache_index_def
;
840 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL)
841 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL)
842 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL)
848 extern void afs_init_callback_state(struct afs_server
*);
849 extern void __afs_break_callback(struct afs_vnode
*);
850 extern void afs_break_callback(struct afs_vnode
*);
851 extern void afs_break_callbacks(struct afs_server
*, size_t, struct afs_callback_break
*);
853 extern int afs_register_server_cb_interest(struct afs_vnode
*,
854 struct afs_server_list
*, unsigned int);
855 extern void afs_put_cb_interest(struct afs_net
*, struct afs_cb_interest
*);
856 extern void afs_clear_callback_interests(struct afs_net
*, struct afs_server_list
*);
858 static inline struct afs_cb_interest
*afs_get_cb_interest(struct afs_cb_interest
*cbi
)
861 refcount_inc(&cbi
->usage
);
865 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode
*vnode
)
867 return vnode
->cb_break
+ vnode
->cb_v_break
;
870 static inline bool afs_cb_is_broken(unsigned int cb_break
,
871 const struct afs_vnode
*vnode
,
872 const struct afs_cb_interest
*cbi
)
874 return !cbi
|| cb_break
!= (vnode
->cb_break
+
875 vnode
->volume
->cb_v_break
);
881 extern int afs_cell_init(struct afs_net
*, const char *);
882 extern struct afs_cell
*afs_lookup_cell_rcu(struct afs_net
*, const char *, unsigned);
883 extern struct afs_cell
*afs_lookup_cell(struct afs_net
*, const char *, unsigned,
885 extern struct afs_cell
*afs_get_cell(struct afs_cell
*);
886 extern void afs_put_cell(struct afs_net
*, struct afs_cell
*);
887 extern void afs_manage_cells(struct work_struct
*);
888 extern void afs_cells_timer(struct timer_list
*);
889 extern void __net_exit
afs_cell_purge(struct afs_net
*);
894 extern bool afs_cm_incoming_call(struct afs_call
*);
899 extern const struct file_operations afs_dir_file_operations
;
900 extern const struct inode_operations afs_dir_inode_operations
;
901 extern const struct address_space_operations afs_dir_aops
;
902 extern const struct dentry_operations afs_fs_dentry_operations
;
904 extern void afs_d_release(struct dentry
*);
909 extern void afs_edit_dir_add(struct afs_vnode
*, struct qstr
*, struct afs_fid
*,
910 enum afs_edit_dir_reason
);
911 extern void afs_edit_dir_remove(struct afs_vnode
*, struct qstr
*, enum afs_edit_dir_reason
);
916 extern int afs_sillyrename(struct afs_vnode
*, struct afs_vnode
*,
917 struct dentry
*, struct key
*);
918 extern int afs_silly_iput(struct dentry
*, struct inode
*);
923 extern const struct file_operations afs_dynroot_file_operations
;
924 extern const struct inode_operations afs_dynroot_inode_operations
;
925 extern const struct dentry_operations afs_dynroot_dentry_operations
;
927 extern struct inode
*afs_try_auto_mntpt(struct dentry
*, struct inode
*);
928 extern int afs_dynroot_mkdir(struct afs_net
*, struct afs_cell
*);
929 extern void afs_dynroot_rmdir(struct afs_net
*, struct afs_cell
*);
930 extern int afs_dynroot_populate(struct super_block
*);
931 extern void afs_dynroot_depopulate(struct super_block
*);
936 extern const struct address_space_operations afs_fs_aops
;
937 extern const struct inode_operations afs_file_inode_operations
;
938 extern const struct file_operations afs_file_operations
;
940 extern int afs_cache_wb_key(struct afs_vnode
*, struct afs_file
*);
941 extern void afs_put_wb_key(struct afs_wb_key
*);
942 extern int afs_open(struct inode
*, struct file
*);
943 extern int afs_release(struct inode
*, struct file
*);
944 extern int afs_fetch_data(struct afs_vnode
*, struct key
*, struct afs_read
*);
945 extern int afs_page_filler(void *, struct page
*);
946 extern void afs_put_read(struct afs_read
*);
951 extern struct workqueue_struct
*afs_lock_manager
;
953 extern void afs_lock_op_done(struct afs_call
*);
954 extern void afs_lock_work(struct work_struct
*);
955 extern void afs_lock_may_be_available(struct afs_vnode
*);
956 extern int afs_lock(struct file
*, int, struct file_lock
*);
957 extern int afs_flock(struct file
*, int, struct file_lock
*);
962 extern int afs_fs_fetch_file_status(struct afs_fs_cursor
*, struct afs_status_cb
*,
963 struct afs_volsync
*);
964 extern int afs_fs_give_up_callbacks(struct afs_net
*, struct afs_server
*);
965 extern int afs_fs_fetch_data(struct afs_fs_cursor
*, struct afs_status_cb
*, struct afs_read
*);
966 extern int afs_fs_create(struct afs_fs_cursor
*, const char *, umode_t
,
967 struct afs_status_cb
*, struct afs_fid
*, struct afs_status_cb
*);
968 extern int afs_fs_remove(struct afs_fs_cursor
*, struct afs_vnode
*, const char *, bool,
969 struct afs_status_cb
*);
970 extern int afs_fs_link(struct afs_fs_cursor
*, struct afs_vnode
*, const char *,
971 struct afs_status_cb
*, struct afs_status_cb
*);
972 extern int afs_fs_symlink(struct afs_fs_cursor
*, const char *, const char *,
973 struct afs_status_cb
*, struct afs_fid
*, struct afs_status_cb
*);
974 extern int afs_fs_rename(struct afs_fs_cursor
*, const char *,
975 struct afs_vnode
*, const char *,
976 struct afs_status_cb
*, struct afs_status_cb
*);
977 extern int afs_fs_store_data(struct afs_fs_cursor
*, struct address_space
*,
978 pgoff_t
, pgoff_t
, unsigned, unsigned, struct afs_status_cb
*);
979 extern int afs_fs_setattr(struct afs_fs_cursor
*, struct iattr
*, struct afs_status_cb
*);
980 extern int afs_fs_get_volume_status(struct afs_fs_cursor
*, struct afs_volume_status
*);
981 extern int afs_fs_set_lock(struct afs_fs_cursor
*, afs_lock_type_t
, struct afs_status_cb
*);
982 extern int afs_fs_extend_lock(struct afs_fs_cursor
*, struct afs_status_cb
*);
983 extern int afs_fs_release_lock(struct afs_fs_cursor
*, struct afs_status_cb
*);
984 extern int afs_fs_give_up_all_callbacks(struct afs_net
*, struct afs_server
*,
985 struct afs_addr_cursor
*, struct key
*);
986 extern struct afs_call
*afs_fs_get_capabilities(struct afs_net
*, struct afs_server
*,
987 struct afs_addr_cursor
*, struct key
*,
989 extern int afs_fs_inline_bulk_status(struct afs_fs_cursor
*, struct afs_net
*,
990 struct afs_fid
*, struct afs_status_cb
*,
991 unsigned int, struct afs_volsync
*);
992 extern int afs_fs_fetch_status(struct afs_fs_cursor
*, struct afs_net
*,
993 struct afs_fid
*, struct afs_status_cb
*,
994 struct afs_volsync
*);
1001 extern struct afs_acl
*afs_fs_fetch_acl(struct afs_fs_cursor
*, struct afs_status_cb
*);
1002 extern int afs_fs_store_acl(struct afs_fs_cursor
*, const struct afs_acl
*,
1003 struct afs_status_cb
*);
1008 extern void afs_fileserver_probe_result(struct afs_call
*);
1009 extern int afs_probe_fileservers(struct afs_net
*, struct key
*, struct afs_server_list
*);
1010 extern int afs_wait_for_fs_probes(struct afs_server_list
*, unsigned long);
1015 extern void afs_vnode_commit_status(struct afs_fs_cursor
*,
1018 const afs_dataversion_t
*,
1019 struct afs_status_cb
*);
1020 extern int afs_fetch_status(struct afs_vnode
*, struct key
*, bool, afs_access_t
*);
1021 extern int afs_iget5_test(struct inode
*, void *);
1022 extern struct inode
*afs_iget_pseudo_dir(struct super_block
*, bool);
1023 extern struct inode
*afs_iget(struct super_block
*, struct key
*,
1024 struct afs_iget_data
*, struct afs_status_cb
*,
1025 struct afs_cb_interest
*,
1026 struct afs_vnode
*);
1027 extern void afs_zap_data(struct afs_vnode
*);
1028 extern bool afs_check_validity(struct afs_vnode
*);
1029 extern int afs_validate(struct afs_vnode
*, struct key
*);
1030 extern int afs_getattr(const struct path
*, struct kstat
*, u32
, unsigned int);
1031 extern int afs_setattr(struct dentry
*, struct iattr
*);
1032 extern void afs_evict_inode(struct inode
*);
1033 extern int afs_drop_inode(struct inode
*);
1038 extern struct workqueue_struct
*afs_wq
;
1039 extern int afs_net_id
;
1041 static inline struct afs_net
*afs_net(struct net
*net
)
1043 return net_generic(net
, afs_net_id
);
1046 static inline struct afs_net
*afs_sb2net(struct super_block
*sb
)
1048 return afs_net(AFS_FS_S(sb
)->net_ns
);
1051 static inline struct afs_net
*afs_d2net(struct dentry
*dentry
)
1053 return afs_sb2net(dentry
->d_sb
);
1056 static inline struct afs_net
*afs_i2net(struct inode
*inode
)
1058 return afs_sb2net(inode
->i_sb
);
1061 static inline struct afs_net
*afs_v2net(struct afs_vnode
*vnode
)
1063 return afs_i2net(&vnode
->vfs_inode
);
1066 static inline struct afs_net
*afs_sock2net(struct sock
*sk
)
1068 return net_generic(sock_net(sk
), afs_net_id
);
1071 static inline void __afs_stat(atomic_t
*s
)
1076 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n)
1081 extern int afs_abort_to_error(u32
);
1082 extern void afs_prioritise_error(struct afs_error
*, int, u32
);
1087 extern const struct inode_operations afs_mntpt_inode_operations
;
1088 extern const struct inode_operations afs_autocell_inode_operations
;
1089 extern const struct file_operations afs_mntpt_file_operations
;
1091 extern struct vfsmount
*afs_d_automount(struct path
*);
1092 extern void afs_mntpt_kill_timer(void);
1097 extern int afs_get_ipv4_interfaces(struct afs_net
*, struct afs_interface
*,
1103 #ifdef CONFIG_PROC_FS
1104 extern int __net_init
afs_proc_init(struct afs_net
*);
1105 extern void __net_exit
afs_proc_cleanup(struct afs_net
*);
1106 extern int afs_proc_cell_setup(struct afs_cell
*);
1107 extern void afs_proc_cell_remove(struct afs_cell
*);
1108 extern void afs_put_sysnames(struct afs_sysnames
*);
1110 static inline int afs_proc_init(struct afs_net
*net
) { return 0; }
1111 static inline void afs_proc_cleanup(struct afs_net
*net
) {}
1112 static inline int afs_proc_cell_setup(struct afs_cell
*cell
) { return 0; }
1113 static inline void afs_proc_cell_remove(struct afs_cell
*cell
) {}
1114 static inline void afs_put_sysnames(struct afs_sysnames
*sysnames
) {}
1120 extern bool afs_begin_vnode_operation(struct afs_fs_cursor
*, struct afs_vnode
*,
1121 struct key
*, bool);
1122 extern bool afs_select_fileserver(struct afs_fs_cursor
*);
1123 extern bool afs_select_current_fileserver(struct afs_fs_cursor
*);
1124 extern int afs_end_vnode_operation(struct afs_fs_cursor
*);
1129 extern struct workqueue_struct
*afs_async_calls
;
1131 extern int __net_init
afs_open_socket(struct afs_net
*);
1132 extern void __net_exit
afs_close_socket(struct afs_net
*);
1133 extern void afs_charge_preallocation(struct work_struct
*);
1134 extern void afs_put_call(struct afs_call
*);
1135 extern void afs_make_call(struct afs_addr_cursor
*, struct afs_call
*, gfp_t
);
1136 extern long afs_wait_for_call_to_complete(struct afs_call
*, struct afs_addr_cursor
*);
1137 extern struct afs_call
*afs_alloc_flat_call(struct afs_net
*,
1138 const struct afs_call_type
*,
1140 extern void afs_flat_call_destructor(struct afs_call
*);
1141 extern void afs_send_empty_reply(struct afs_call
*);
1142 extern void afs_send_simple_reply(struct afs_call
*, const void *, size_t);
1143 extern int afs_extract_data(struct afs_call
*, bool);
1144 extern int afs_protocol_error(struct afs_call
*, int, enum afs_eproto_cause
);
1146 static inline void afs_set_fc_call(struct afs_call
*call
, struct afs_fs_cursor
*fc
)
1148 call
->intr
= fc
->flags
& AFS_FS_CURSOR_INTR
;
1149 fc
->type
= call
->type
;
1152 static inline void afs_extract_begin(struct afs_call
*call
, void *buf
, size_t size
)
1154 call
->kvec
[0].iov_base
= buf
;
1155 call
->kvec
[0].iov_len
= size
;
1156 iov_iter_kvec(&call
->iter
, READ
, call
->kvec
, 1, size
);
1159 static inline void afs_extract_to_tmp(struct afs_call
*call
)
1161 afs_extract_begin(call
, &call
->tmp
, sizeof(call
->tmp
));
1164 static inline void afs_extract_to_tmp64(struct afs_call
*call
)
1166 afs_extract_begin(call
, &call
->tmp64
, sizeof(call
->tmp64
));
1169 static inline void afs_extract_discard(struct afs_call
*call
, size_t size
)
1171 iov_iter_discard(&call
->iter
, READ
, size
);
1174 static inline void afs_extract_to_buf(struct afs_call
*call
, size_t size
)
1176 afs_extract_begin(call
, call
->buffer
, size
);
1179 static inline int afs_transfer_reply(struct afs_call
*call
)
1181 return afs_extract_data(call
, false);
1184 static inline bool afs_check_call_state(struct afs_call
*call
,
1185 enum afs_call_state state
)
1187 return READ_ONCE(call
->state
) == state
;
1190 static inline bool afs_set_call_state(struct afs_call
*call
,
1191 enum afs_call_state from
,
1192 enum afs_call_state to
)
1196 spin_lock_bh(&call
->state_lock
);
1197 if (call
->state
== from
) {
1199 trace_afs_call_state(call
, from
, to
, 0, 0);
1202 spin_unlock_bh(&call
->state_lock
);
1206 static inline void afs_set_call_complete(struct afs_call
*call
,
1207 int error
, u32 remote_abort
)
1209 enum afs_call_state state
;
1212 spin_lock_bh(&call
->state_lock
);
1213 state
= call
->state
;
1214 if (state
!= AFS_CALL_COMPLETE
) {
1215 call
->abort_code
= remote_abort
;
1216 call
->error
= error
;
1217 call
->state
= AFS_CALL_COMPLETE
;
1218 trace_afs_call_state(call
, state
, AFS_CALL_COMPLETE
,
1219 error
, remote_abort
);
1222 spin_unlock_bh(&call
->state_lock
);
1224 trace_afs_call_done(call
);
1230 extern void afs_put_permits(struct afs_permits
*);
1231 extern void afs_clear_permits(struct afs_vnode
*);
1232 extern void afs_cache_permit(struct afs_vnode
*, struct key
*, unsigned int,
1233 struct afs_status_cb
*);
1234 extern void afs_zap_permits(struct rcu_head
*);
1235 extern struct key
*afs_request_key(struct afs_cell
*);
1236 extern int afs_check_permit(struct afs_vnode
*, struct key
*, afs_access_t
*);
1237 extern int afs_permission(struct inode
*, int);
1238 extern void __exit
afs_clean_up_permit_cache(void);
1243 extern spinlock_t afs_server_peer_lock
;
1245 static inline struct afs_server
*afs_get_server(struct afs_server
*server
)
1247 atomic_inc(&server
->usage
);
1251 extern struct afs_server
*afs_find_server(struct afs_net
*,
1252 const struct sockaddr_rxrpc
*);
1253 extern struct afs_server
*afs_find_server_by_uuid(struct afs_net
*, const uuid_t
*);
1254 extern struct afs_server
*afs_lookup_server(struct afs_cell
*, struct key
*, const uuid_t
*);
1255 extern void afs_put_server(struct afs_net
*, struct afs_server
*);
1256 extern void afs_manage_servers(struct work_struct
*);
1257 extern void afs_servers_timer(struct timer_list
*);
1258 extern void __net_exit
afs_purge_servers(struct afs_net
*);
1259 extern bool afs_check_server_record(struct afs_fs_cursor
*, struct afs_server
*);
1264 static inline struct afs_server_list
*afs_get_serverlist(struct afs_server_list
*slist
)
1266 refcount_inc(&slist
->usage
);
1270 extern void afs_put_serverlist(struct afs_net
*, struct afs_server_list
*);
1271 extern struct afs_server_list
*afs_alloc_server_list(struct afs_cell
*, struct key
*,
1272 struct afs_vldb_entry
*,
1274 extern bool afs_annotate_server_list(struct afs_server_list
*, struct afs_server_list
*);
1279 extern int __init
afs_fs_init(void);
1280 extern void afs_fs_exit(void);
1285 extern struct afs_vldb_entry
*afs_vl_get_entry_by_name_u(struct afs_vl_cursor
*,
1287 extern struct afs_addr_list
*afs_vl_get_addrs_u(struct afs_vl_cursor
*, const uuid_t
*);
1288 extern struct afs_call
*afs_vl_get_capabilities(struct afs_net
*, struct afs_addr_cursor
*,
1289 struct key
*, struct afs_vlserver
*, unsigned int);
1290 extern struct afs_addr_list
*afs_yfsvl_get_endpoints(struct afs_vl_cursor
*, const uuid_t
*);
1295 extern void afs_vlserver_probe_result(struct afs_call
*);
1296 extern int afs_send_vl_probes(struct afs_net
*, struct key
*, struct afs_vlserver_list
*);
1297 extern int afs_wait_for_vl_probes(struct afs_vlserver_list
*, unsigned long);
1302 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor
*,
1303 struct afs_cell
*, struct key
*);
1304 extern bool afs_select_vlserver(struct afs_vl_cursor
*);
1305 extern bool afs_select_current_vlserver(struct afs_vl_cursor
*);
1306 extern int afs_end_vlserver_operation(struct afs_vl_cursor
*);
1311 static inline struct afs_vlserver
*afs_get_vlserver(struct afs_vlserver
*vlserver
)
1313 atomic_inc(&vlserver
->usage
);
1317 static inline struct afs_vlserver_list
*afs_get_vlserverlist(struct afs_vlserver_list
*vllist
)
1320 atomic_inc(&vllist
->usage
);
1324 extern struct afs_vlserver
*afs_alloc_vlserver(const char *, size_t, unsigned short);
1325 extern void afs_put_vlserver(struct afs_net
*, struct afs_vlserver
*);
1326 extern struct afs_vlserver_list
*afs_alloc_vlserver_list(unsigned int);
1327 extern void afs_put_vlserverlist(struct afs_net
*, struct afs_vlserver_list
*);
1328 extern struct afs_vlserver_list
*afs_extract_vlserver_list(struct afs_cell
*,
1329 const void *, size_t);
1334 static inline struct afs_volume
*__afs_get_volume(struct afs_volume
*volume
)
1337 atomic_inc(&volume
->usage
);
1341 extern struct afs_volume
*afs_create_volume(struct afs_fs_context
*);
1342 extern void afs_activate_volume(struct afs_volume
*);
1343 extern void afs_deactivate_volume(struct afs_volume
*);
1344 extern void afs_put_volume(struct afs_cell
*, struct afs_volume
*);
1345 extern int afs_check_volume_status(struct afs_volume
*, struct key
*);
1350 extern int afs_set_page_dirty(struct page
*);
1351 extern int afs_write_begin(struct file
*file
, struct address_space
*mapping
,
1352 loff_t pos
, unsigned len
, unsigned flags
,
1353 struct page
**pagep
, void **fsdata
);
1354 extern int afs_write_end(struct file
*file
, struct address_space
*mapping
,
1355 loff_t pos
, unsigned len
, unsigned copied
,
1356 struct page
*page
, void *fsdata
);
1357 extern int afs_writepage(struct page
*, struct writeback_control
*);
1358 extern int afs_writepages(struct address_space
*, struct writeback_control
*);
1359 extern ssize_t
afs_file_write(struct kiocb
*, struct iov_iter
*);
1360 extern int afs_fsync(struct file
*, loff_t
, loff_t
, int);
1361 extern vm_fault_t
afs_page_mkwrite(struct vm_fault
*vmf
);
1362 extern void afs_prune_wb_keys(struct afs_vnode
*);
1363 extern int afs_launder_page(struct page
*);
1368 extern const struct xattr_handler
*afs_xattr_handlers
[];
1369 extern ssize_t
afs_listxattr(struct dentry
*, char *, size_t);
1374 extern int yfs_fs_fetch_file_status(struct afs_fs_cursor
*, struct afs_status_cb
*,
1375 struct afs_volsync
*);
1376 extern int yfs_fs_fetch_data(struct afs_fs_cursor
*, struct afs_status_cb
*, struct afs_read
*);
1377 extern int yfs_fs_create_file(struct afs_fs_cursor
*, const char *, umode_t
, struct afs_status_cb
*,
1378 struct afs_fid
*, struct afs_status_cb
*);
1379 extern int yfs_fs_make_dir(struct afs_fs_cursor
*, const char *, umode_t
, struct afs_status_cb
*,
1380 struct afs_fid
*, struct afs_status_cb
*);
1381 extern int yfs_fs_remove_file2(struct afs_fs_cursor
*, struct afs_vnode
*, const char *,
1382 struct afs_status_cb
*, struct afs_status_cb
*);
1383 extern int yfs_fs_remove(struct afs_fs_cursor
*, struct afs_vnode
*, const char *, bool,
1384 struct afs_status_cb
*);
1385 extern int yfs_fs_link(struct afs_fs_cursor
*, struct afs_vnode
*, const char *,
1386 struct afs_status_cb
*, struct afs_status_cb
*);
1387 extern int yfs_fs_symlink(struct afs_fs_cursor
*, const char *, const char *,
1388 struct afs_status_cb
*, struct afs_fid
*, struct afs_status_cb
*);
1389 extern int yfs_fs_rename(struct afs_fs_cursor
*, const char *, struct afs_vnode
*, const char *,
1390 struct afs_status_cb
*, struct afs_status_cb
*);
1391 extern int yfs_fs_store_data(struct afs_fs_cursor
*, struct address_space
*,
1392 pgoff_t
, pgoff_t
, unsigned, unsigned, struct afs_status_cb
*);
1393 extern int yfs_fs_setattr(struct afs_fs_cursor
*, struct iattr
*, struct afs_status_cb
*);
1394 extern int yfs_fs_get_volume_status(struct afs_fs_cursor
*, struct afs_volume_status
*);
1395 extern int yfs_fs_set_lock(struct afs_fs_cursor
*, afs_lock_type_t
, struct afs_status_cb
*);
1396 extern int yfs_fs_extend_lock(struct afs_fs_cursor
*, struct afs_status_cb
*);
1397 extern int yfs_fs_release_lock(struct afs_fs_cursor
*, struct afs_status_cb
*);
1398 extern int yfs_fs_fetch_status(struct afs_fs_cursor
*, struct afs_net
*,
1399 struct afs_fid
*, struct afs_status_cb
*,
1400 struct afs_volsync
*);
1401 extern int yfs_fs_inline_bulk_status(struct afs_fs_cursor
*, struct afs_net
*,
1402 struct afs_fid
*, struct afs_status_cb
*,
1403 unsigned int, struct afs_volsync
*);
1406 struct afs_acl
*acl
; /* Dir/file/symlink ACL */
1407 struct afs_acl
*vol_acl
; /* Whole volume ACL */
1408 u32 inherit_flag
; /* True if ACL is inherited from parent dir */
1409 u32 num_cleaned
; /* Number of ACEs removed due to subject removal */
1411 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */
1412 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */
1415 extern void yfs_free_opaque_acl(struct yfs_acl
*);
1416 extern struct yfs_acl
*yfs_fs_fetch_opaque_acl(struct afs_fs_cursor
*, struct yfs_acl
*,
1417 struct afs_status_cb
*);
1418 extern int yfs_fs_store_opaque_acl2(struct afs_fs_cursor
*, const struct afs_acl
*,
1419 struct afs_status_cb
*);
1422 * Miscellaneous inline functions.
1424 static inline struct afs_vnode
*AFS_FS_I(struct inode
*inode
)
1426 return container_of(inode
, struct afs_vnode
, vfs_inode
);
1429 static inline struct inode
*AFS_VNODE_TO_I(struct afs_vnode
*vnode
)
1431 return &vnode
->vfs_inode
;
1434 static inline void afs_check_for_remote_deletion(struct afs_fs_cursor
*fc
,
1435 struct afs_vnode
*vnode
)
1437 if (fc
->ac
.error
== -ENOENT
) {
1438 set_bit(AFS_VNODE_DELETED
, &vnode
->flags
);
1439 afs_break_callback(vnode
);
1443 static inline int afs_io_error(struct afs_call
*call
, enum afs_io_error where
)
1445 trace_afs_io_error(call
->debug_id
, -EIO
, where
);
1449 static inline int afs_bad(struct afs_vnode
*vnode
, enum afs_file_error where
)
1451 trace_afs_file_error(vnode
, -EIO
, where
);
1455 /*****************************************************************************/
1459 extern unsigned afs_debug
;
1461 #define dbgprintk(FMT,...) \
1462 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1464 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1465 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1466 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1469 #if defined(__KDEBUG)
1470 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1471 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1472 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1474 #elif defined(CONFIG_AFS_DEBUG)
1475 #define AFS_DEBUG_KENTER 0x01
1476 #define AFS_DEBUG_KLEAVE 0x02
1477 #define AFS_DEBUG_KDEBUG 0x04
1479 #define _enter(FMT,...) \
1481 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
1482 kenter(FMT,##__VA_ARGS__); \
1485 #define _leave(FMT,...) \
1487 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
1488 kleave(FMT,##__VA_ARGS__); \
1491 #define _debug(FMT,...) \
1493 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
1494 kdebug(FMT,##__VA_ARGS__); \
1498 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1499 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1500 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1504 * debug assertion checking
1506 #if 1 // defined(__KDEBUGALL)
1510 if (unlikely(!(X))) { \
1511 printk(KERN_ERR "\n"); \
1512 printk(KERN_ERR "AFS: Assertion failed\n"); \
1517 #define ASSERTCMP(X, OP, Y) \
1519 if (unlikely(!((X) OP (Y)))) { \
1520 printk(KERN_ERR "\n"); \
1521 printk(KERN_ERR "AFS: Assertion failed\n"); \
1522 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1523 (unsigned long)(X), (unsigned long)(Y)); \
1524 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1525 (unsigned long)(X), (unsigned long)(Y)); \
1530 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1532 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \
1533 printk(KERN_ERR "\n"); \
1534 printk(KERN_ERR "AFS: Assertion failed\n"); \
1535 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \
1536 (unsigned long)(L), (unsigned long)(N), \
1537 (unsigned long)(H)); \
1538 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
1539 (unsigned long)(L), (unsigned long)(N), \
1540 (unsigned long)(H)); \
1545 #define ASSERTIF(C, X) \
1547 if (unlikely((C) && !(X))) { \
1548 printk(KERN_ERR "\n"); \
1549 printk(KERN_ERR "AFS: Assertion failed\n"); \
1554 #define ASSERTIFCMP(C, X, OP, Y) \
1556 if (unlikely((C) && !((X) OP (Y)))) { \
1557 printk(KERN_ERR "\n"); \
1558 printk(KERN_ERR "AFS: Assertion failed\n"); \
1559 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1560 (unsigned long)(X), (unsigned long)(Y)); \
1561 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1562 (unsigned long)(X), (unsigned long)(Y)); \
1573 #define ASSERTCMP(X, OP, Y) \
1577 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1581 #define ASSERTIF(C, X) \
1585 #define ASSERTIFCMP(C, X, OP, Y) \
1589 #endif /* __KDEBUGALL */