3 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 #include <linux/compiler.h>
13 #include <linux/kernel.h>
14 #include <linux/ktime.h>
16 #include <linux/pagemap.h>
17 #include <linux/rxrpc.h>
18 #include <linux/key.h>
19 #include <linux/workqueue.h>
20 #include <linux/sched.h>
21 #include <linux/fscache.h>
22 #include <linux/backing-dev.h>
23 #include <linux/uuid.h>
24 #include <linux/mm_types.h>
25 #include <linux/dns_resolver.h>
26 #include <net/net_namespace.h>
27 #include <net/netns/generic.h>
29 #include <net/af_rxrpc.h>
34 #define AFS_CELL_MAX_ADDRS 15
40 * Partial file-locking emulation mode. (The problem being that AFS3 only
41 * allows whole-file locks and no upgrading/downgrading).
45 afs_flock_mode_local, /* Local locking only */
46 afs_flock_mode_openafs, /* Don't get server lock for a partial lock */
47 afs_flock_mode_strict, /* Always get a server lock for a partial lock */
48 afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */
51 struct afs_fs_context {
52 bool force; /* T to force cell type */
53 bool autocell; /* T if set auto mount operation */
54 bool dyn_root; /* T if dynamic root */
55 bool no_cell; /* T if the source is "none" (for dynroot) */
56 enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */
57 afs_voltype_t type; /* type of volume requested */
58 unsigned int volnamesz; /* size of volume name */
59 const char *volname; /* name of volume to mount */
60 struct afs_net *net; /* the AFS net namespace stuff */
61 struct afs_cell *cell; /* cell in which to find volume */
62 struct afs_volume *volume; /* volume record */
63 struct key *key; /* key to use for secure mounting */
66 struct afs_iget_data {
68 struct afs_volume *volume; /* volume on which resides */
72 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */
73 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */
74 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */
75 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */
76 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */
77 AFS_CALL_SV_REPLYING, /* Server: Replying */
78 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */
79 AFS_CALL_COMPLETE, /* Completed or failed */
83 * List of server addresses.
85 struct afs_addr_list {
86 struct rcu_head rcu; /* Must be first */
88 u32 version; /* Version */
89 unsigned char max_addrs;
90 unsigned char nr_addrs;
91 unsigned char preferred; /* Preferred address */
92 unsigned char nr_ipv4; /* Number of IPv4 addresses */
93 enum dns_record_source source:8;
94 enum dns_lookup_status status:8;
95 unsigned long probed; /* Mask of servers that have been probed */
96 unsigned long failed; /* Mask of addrs that failed locally/ICMP */
97 unsigned long responded; /* Mask of addrs that responded */
98 struct sockaddr_rxrpc addrs[];
99 #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8))
103 * a record of an in-progress RxRPC call
106 const struct afs_call_type *type; /* type of call */
107 struct afs_addr_list *alist; /* Address is alist[addr_ix] */
108 wait_queue_head_t waitq; /* processes awaiting completion */
109 struct work_struct async_work; /* async I/O processor */
110 struct work_struct work; /* actual work processor */
111 struct rxrpc_call *rxcall; /* RxRPC call handle */
112 struct key *key; /* security for this call */
113 struct afs_net *net; /* The network namespace */
114 struct afs_server *cm_server; /* Server affected by incoming CM call */
115 struct afs_cb_interest *cbi; /* Callback interest for server used */
116 void *request; /* request data (first part) */
117 struct address_space *mapping; /* Pages being written from */
118 struct iov_iter iter; /* Buffer iterator */
119 struct iov_iter *_iter; /* Iterator currently in use */
120 union { /* Convenience for ->iter */
122 struct bio_vec bvec[1];
124 void *buffer; /* reply receive buffer */
125 void *reply[4]; /* Where to put the reply */
126 pgoff_t first; /* first page in mapping to deal with */
127 pgoff_t last; /* last page in mapping to deal with */
129 enum afs_call_state state;
130 spinlock_t state_lock;
131 int error; /* error code */
132 u32 abort_code; /* Remote abort ID or 0 */
134 unsigned request_size; /* size of request data */
135 unsigned reply_max; /* maximum size of reply */
136 unsigned first_offset; /* offset into mapping[first] */
137 unsigned int cb_break; /* cb_break + cb_s_break before the call */
139 unsigned last_to; /* amount of mapping[last] */
140 unsigned count2; /* count used in unmarshalling */
142 unsigned char unmarshall; /* unmarshalling phase */
143 unsigned char addr_ix; /* Address in ->alist */
144 bool incoming; /* T if incoming call */
145 bool send_pages; /* T if data from mapping should be sent */
146 bool need_attention; /* T if RxRPC poked us */
147 bool async; /* T if asynchronous */
148 bool ret_reply0; /* T if should return reply[0] on success */
149 bool upgrade; /* T to request service upgrade */
150 bool want_reply_time; /* T if want reply_time */
151 u16 service_id; /* Actual service ID (after upgrade) */
152 unsigned int debug_id; /* Trace ID */
153 u32 operation_ID; /* operation ID for an incoming call */
154 u32 count; /* count for use in unmarshalling */
155 union { /* place to extract temporary data */
159 } __attribute__((packed));
162 afs_dataversion_t expected_version; /* Updated version expected from store */
163 afs_dataversion_t expected_version_2; /* 2nd updated version expected from store */
164 ktime_t reply_time; /* Time of first reply packet */
167 struct afs_call_type {
169 unsigned int op; /* Really enum afs_fs_operation */
171 /* deliver request or reply data to an call
172 * - returning an error will cause the call to be aborted
174 int (*deliver)(struct afs_call *call);
176 /* clean up a call */
177 void (*destructor)(struct afs_call *call);
180 void (*work)(struct work_struct *work);
182 /* Call done function (gets called immediately on success or failure) */
183 void (*done)(struct afs_call *call);
187 * Key available for writeback on a file.
192 struct list_head vnode_link; /* Link in vnode->wb_keys */
196 * AFS open file information record. Pointed to by file->private_data.
199 struct key *key; /* The key this file was opened with */
200 struct afs_wb_key *wb; /* Writeback key record for this file */
203 static inline struct key *afs_file_key(struct file *file)
205 struct afs_file *af = file->private_data;
211 * Record of an outstanding read operation on a vnode.
214 loff_t pos; /* Where to start reading */
215 loff_t len; /* How much we're asking for */
216 loff_t actual_len; /* How much we're actually getting */
217 loff_t remain; /* Amount remaining */
218 loff_t file_size; /* File size returned by server */
219 afs_dataversion_t data_version; /* Version number returned by server */
221 unsigned int index; /* Which page we're reading into */
222 unsigned int nr_pages;
223 unsigned int offset; /* offset into current page */
224 void (*page_done)(struct afs_call *, struct afs_read *);
226 struct page *array[];
230 * AFS superblock private data
231 * - there's one superblock per volume
233 struct afs_super_info {
234 struct net *net_ns; /* Network namespace */
235 struct afs_cell *cell; /* The cell in which the volume resides */
236 struct afs_volume *volume; /* volume record */
237 enum afs_flock_mode flock_mode:8; /* File locking emulation mode */
238 bool dyn_root; /* True if dynamic root */
241 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
243 return sb->s_fs_info;
246 extern struct file_system_type afs_fs_type;
249 * Set of substitutes for @sys.
251 struct afs_sysnames {
252 #define AFS_NR_SYSNAME 16
253 char *subs[AFS_NR_SYSNAME];
260 * AFS network namespace record.
263 struct net *net; /* Backpointer to the owning net namespace */
264 struct afs_uuid uuid;
265 bool live; /* F if this namespace is being removed */
267 /* AF_RXRPC I/O stuff */
268 struct socket *socket;
269 struct afs_call *spare_incoming_call;
270 struct work_struct charge_preallocation_work;
271 struct mutex socket_mutex;
272 atomic_t nr_outstanding_calls;
273 atomic_t nr_superblocks;
276 struct rb_root cells;
277 struct afs_cell __rcu *ws_cell;
278 struct work_struct cells_manager;
279 struct timer_list cells_timer;
280 atomic_t cells_outstanding;
281 seqlock_t cells_lock;
283 struct mutex proc_cells_lock;
284 struct hlist_head proc_cells;
286 /* Known servers. Theoretically each fileserver can only be in one
287 * cell, but in practice, people create aliases and subsets and there's
288 * no easy way to distinguish them.
290 seqlock_t fs_lock; /* For fs_servers */
291 struct rb_root fs_servers; /* afs_server (by server UUID or address) */
292 struct list_head fs_updates; /* afs_server (by update_at) */
293 struct hlist_head fs_proc; /* procfs servers list */
295 struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */
296 struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */
297 seqlock_t fs_addr_lock; /* For fs_addresses[46] */
299 struct work_struct fs_manager;
300 struct timer_list fs_timer;
301 atomic_t servers_outstanding;
303 /* File locking renewal management */
304 struct mutex lock_manager_mutex;
307 struct super_block *dynroot_sb; /* Dynamic root mount superblock */
308 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */
309 struct afs_sysnames *sysnames;
310 rwlock_t sysnames_lock;
312 /* Statistics counters */
313 atomic_t n_lookup; /* Number of lookups done */
314 atomic_t n_reval; /* Number of dentries needing revalidation */
315 atomic_t n_inval; /* Number of invalidations by the server */
316 atomic_t n_relpg; /* Number of invalidations by releasepage */
317 atomic_t n_read_dir; /* Number of directory pages read */
318 atomic_t n_dir_cr; /* Number of directory entry creation edits */
319 atomic_t n_dir_rm; /* Number of directory entry removal edits */
320 atomic_t n_stores; /* Number of store ops */
321 atomic_long_t n_store_bytes; /* Number of bytes stored */
322 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */
323 atomic_t n_fetches; /* Number of data fetch ops */
326 extern const char afs_init_sysname[];
328 enum afs_cell_state {
332 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 * There is no easy way to determine if two cells are aliases or one is a
357 struct rb_node net_node; /* Node in net->cells */
360 struct key *anonymous_key; /* anonymous user key for this cell */
361 struct work_struct manager; /* Manager for init/deinit/dns */
362 struct hlist_node proc_link; /* /proc cell list link */
363 #ifdef CONFIG_AFS_FSCACHE
364 struct fscache_cookie *cache; /* caching cookie */
366 time64_t dns_expiry; /* Time AFSDB/SRV record expires */
367 time64_t last_inactive; /* Time of last drop of usage count */
370 #define AFS_CELL_FL_NOT_READY 0 /* The cell record is not ready for use */
371 #define AFS_CELL_FL_NO_GC 1 /* The cell was added manually, don't auto-gc */
372 #define AFS_CELL_FL_NOT_FOUND 2 /* Permanent DNS error */
373 #define AFS_CELL_FL_DNS_FAIL 3 /* Failed to access DNS */
374 #define AFS_CELL_FL_NO_LOOKUP_YET 4 /* Not completed first DNS lookup yet */
375 enum afs_cell_state state;
378 /* Active fileserver interaction state. */
379 struct list_head proc_volumes; /* procfs volume list */
382 /* VL server list. */
383 rwlock_t vl_servers_lock; /* Lock on vl_servers */
384 struct afs_vlserver_list __rcu *vl_servers;
386 u8 name_len; /* Length of name */
387 char name[64 + 1]; /* Cell name, case-flattened and NUL-padded */
391 * Volume Location server record.
393 struct afs_vlserver {
395 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */
397 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */
398 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */
399 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */
400 rwlock_t lock; /* Lock on addresses */
404 wait_queue_head_t probe_wq;
405 atomic_t probe_outstanding;
406 spinlock_t probe_lock;
408 unsigned int rtt; /* RTT as ktime/64 */
415 bool local_failure:1;
419 u16 name_len; /* Length of name */
420 char name[]; /* Server name, case-flattened */
424 * Weighted list of Volume Location servers.
426 struct afs_vlserver_entry {
427 u16 priority; /* Preference (as SRV) */
428 u16 weight; /* Weight (as SRV) */
429 enum dns_record_source source:8;
430 enum dns_lookup_status status:8;
431 struct afs_vlserver *server;
434 struct afs_vlserver_list {
438 u8 index; /* Server currently in use */
439 u8 preferred; /* Preferred server */
440 enum dns_record_source source:8;
441 enum dns_lookup_status status:8;
443 struct afs_vlserver_entry servers[];
449 * This is pointed to by cell->vldb_entries, indexed by name.
451 struct afs_vldb_entry {
452 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */
455 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */
456 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */
457 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */
458 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */
459 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */
461 uuid_t fs_server[AFS_NMAXNSERVERS];
462 u8 fs_mask[AFS_NMAXNSERVERS];
463 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */
464 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */
465 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */
467 u8 nr_servers; /* Number of server records */
469 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
473 * Record of fileserver with which we're actively communicating.
478 uuid_t uuid; /* Server ID */
479 struct afs_uuid _uuid;
482 struct afs_addr_list __rcu *addresses;
483 struct rb_node uuid_rb; /* Link in net->servers */
484 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */
485 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */
486 struct hlist_node proc_link; /* Link in net->fs_proc */
487 struct afs_server *gc_next; /* Next server in manager's list */
488 time64_t put_time; /* Time at which last put */
489 time64_t update_at; /* Time at which to next update the record */
491 #define AFS_SERVER_FL_NOT_READY 1 /* The record is not ready for use */
492 #define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */
493 #define AFS_SERVER_FL_VL_FAIL 3 /* Failed to access VL server */
494 #define AFS_SERVER_FL_UPDATING 4
495 #define AFS_SERVER_FL_PROBED 5 /* The fileserver has been probed */
496 #define AFS_SERVER_FL_PROBING 6 /* Fileserver is being probed */
497 #define AFS_SERVER_FL_NO_IBULK 7 /* Fileserver doesn't support FS.InlineBulkStatus */
498 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */
499 #define AFS_SERVER_FL_IS_YFS 9 /* Server is YFS not AFS */
500 #define AFS_SERVER_FL_NO_RM2 10 /* Fileserver doesn't support YFS.RemoveFile2 */
501 #define AFS_SERVER_FL_HAVE_EPOCH 11 /* ->epoch is valid */
503 u32 addr_version; /* Address list version */
504 u32 cm_epoch; /* Server RxRPC epoch */
506 /* file service access */
507 rwlock_t fs_lock; /* access lock */
509 /* callback promise management */
510 struct hlist_head cb_volumes; /* List of volume interests on this server */
511 unsigned cb_s_break; /* Break-everything counter. */
512 rwlock_t cb_break_lock; /* Volume finding lock */
515 wait_queue_head_t probe_wq;
516 atomic_t probe_outstanding;
517 spinlock_t probe_lock;
519 unsigned int rtt; /* RTT as ktime/64 */
527 bool local_failure:1;
530 bool said_rebooted:1;
531 bool said_inconsistent:1;
536 * Volume collation in the server's callback interest list.
538 struct afs_vol_interest {
539 struct hlist_node srv_link; /* Link in server->cb_volumes */
540 struct hlist_head cb_interests; /* List of callback interests on the server */
541 afs_volid_t vid; /* Volume ID to match */
546 * Interest by a superblock on a server.
548 struct afs_cb_interest {
549 struct hlist_node cb_vlink; /* Link in vol_interest->cb_interests */
550 struct afs_vol_interest *vol_interest;
551 struct afs_server *server; /* Server on which this interest resides */
552 struct super_block *sb; /* Superblock on which inodes reside */
553 afs_volid_t vid; /* Volume ID to match */
558 * Replaceable server list.
560 struct afs_server_entry {
561 struct afs_server *server;
562 struct afs_cb_interest *cb_interest;
565 struct afs_server_list {
567 unsigned char nr_servers;
568 unsigned char preferred; /* Preferred server */
569 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */
570 unsigned int seq; /* Set to ->servers_seq when installed */
572 struct afs_server_entry servers[];
576 * Live AFS volume management.
579 afs_volid_t vid; /* volume ID */
581 time64_t update_at; /* Time at which to next update */
582 struct afs_cell *cell; /* Cell to which belongs (pins ref) */
583 struct list_head proc_link; /* Link in cell->vl_proc */
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 #ifdef CONFIG_AFS_FSCACHE
592 struct fscache_cookie *cache; /* caching cookie */
594 struct afs_server_list *servers; /* List of servers on which volume resides */
595 rwlock_t servers_lock; /* Lock for ->servers */
596 unsigned int servers_seq; /* Incremented each time ->servers changes */
598 unsigned cb_v_break; /* Break-everything counter. */
599 rwlock_t cb_break_lock;
601 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) */
653 struct list_head wb_keys; /* List of keys available for writeback */
654 struct list_head pending_locks; /* locks waiting to be granted */
655 struct list_head granted_locks; /* locks granted on this file */
656 struct delayed_work lock_work; /* work to be done in locking */
657 struct key *lock_key; /* Key to be used in lock ops */
658 ktime_t locked_at; /* Time at which lock obtained */
659 enum afs_lock_state lock_state : 8;
660 afs_lock_type_t lock_type : 8;
662 /* outstanding callback notification on this file */
663 struct afs_cb_interest *cb_interest; /* Server on which this resides */
664 unsigned int cb_s_break; /* Mass break counter on ->server */
665 unsigned int cb_v_break; /* Mass break counter on ->volume */
666 unsigned int cb_break; /* Break counter on vnode */
667 seqlock_t cb_lock; /* Lock for ->cb_interest, ->status, ->cb_*break */
669 time64_t cb_expires_at; /* time at which callback expires */
670 unsigned cb_version; /* callback version */
671 afs_callback_type_t cb_type; /* type of callback */
674 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode)
676 #ifdef CONFIG_AFS_FSCACHE
684 * cached security record for one user's attempt to access a vnode
687 struct key *key; /* RxRPC ticket holding a security context */
688 afs_access_t access; /* CallerAccess value for this key */
692 * Immutable cache of CallerAccess records from attempts to access vnodes.
693 * These may be shared between multiple vnodes.
697 struct hlist_node hash_node; /* Link in hash */
698 unsigned long h; /* Hash value for this permit list */
700 unsigned short nr_permits; /* Number of records */
701 bool invalidated; /* Invalidated due to key change */
702 struct afs_permit permits[]; /* List of permits sorted by key pointer */
706 * record of one of a system's set of network interfaces
708 struct afs_interface {
709 struct in_addr address; /* IPv4 address bound to interface */
710 struct in_addr netmask; /* netmask applied to address */
711 unsigned mtu; /* MTU of interface */
715 * Error prioritisation and accumulation.
718 short error; /* Accumulated error */
719 bool responded; /* T if server responded */
723 * Cursor for iterating over a server's address list.
725 struct afs_addr_cursor {
726 struct afs_addr_list *alist; /* Current address list (pins ref) */
727 unsigned long tried; /* Tried addresses */
728 signed char index; /* Current address */
729 bool responded; /* T if the current address responded */
730 unsigned short nr_iterations; /* Number of address iterations */
736 * Cursor for iterating over a set of volume location servers.
738 struct afs_vl_cursor {
739 struct afs_addr_cursor ac;
740 struct afs_cell *cell; /* The cell we're querying */
741 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */
742 struct afs_vlserver *server; /* Server on which this resides */
743 struct key *key; /* Key for the server */
744 unsigned long untried; /* Bitmask of untried servers */
745 short index; /* Current server */
747 unsigned short flags;
748 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */
749 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */
750 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */
751 unsigned short nr_iterations; /* Number of server iterations */
755 * Cursor for iterating over a set of fileservers.
757 struct afs_fs_cursor {
758 struct afs_addr_cursor ac;
759 struct afs_vnode *vnode;
760 struct afs_server_list *server_list; /* Current server list (pins ref) */
761 struct afs_cb_interest *cbi; /* Server on which this resides (pins ref) */
762 struct key *key; /* Key for the server */
763 unsigned long untried; /* Bitmask of untried servers */
764 unsigned int cb_break; /* cb_break + cb_s_break before the call */
765 unsigned int cb_break_2; /* cb_break + cb_s_break (2nd vnode) */
766 short index; /* Current server */
768 unsigned short flags;
769 #define AFS_FS_CURSOR_STOP 0x0001 /* Set to cease iteration */
770 #define AFS_FS_CURSOR_VBUSY 0x0002 /* Set if seen VBUSY */
771 #define AFS_FS_CURSOR_VMOVED 0x0004 /* Set if seen VMOVED */
772 #define AFS_FS_CURSOR_VNOVOL 0x0008 /* Set if seen VNOVOL */
773 #define AFS_FS_CURSOR_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */
774 #define AFS_FS_CURSOR_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */
775 unsigned short nr_iterations; /* Number of server iterations */
779 * Cache auxiliary data.
781 struct afs_vnode_cache_aux {
785 #include <trace/events/afs.h>
787 /*****************************************************************************/
791 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist)
794 refcount_inc(&alist->usage);
797 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int,
800 extern void afs_put_addrlist(struct afs_addr_list *);
801 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *,
802 const char *, size_t, char,
803 unsigned short, unsigned short);
804 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *);
805 extern bool afs_iterate_addresses(struct afs_addr_cursor *);
806 extern int afs_end_cursor(struct afs_addr_cursor *);
808 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16);
809 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16);
814 #ifdef CONFIG_AFS_FSCACHE
815 extern struct fscache_netfs afs_cache_netfs;
816 extern struct fscache_cookie_def afs_cell_cache_index_def;
817 extern struct fscache_cookie_def afs_volume_cache_index_def;
818 extern struct fscache_cookie_def afs_vnode_cache_index_def;
820 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL)
821 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL)
822 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL)
828 extern void afs_init_callback_state(struct afs_server *);
829 extern void __afs_break_callback(struct afs_vnode *);
830 extern void afs_break_callback(struct afs_vnode *);
831 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break*);
833 extern int afs_register_server_cb_interest(struct afs_vnode *,
834 struct afs_server_list *, unsigned int);
835 extern void afs_put_cb_interest(struct afs_net *, struct afs_cb_interest *);
836 extern void afs_clear_callback_interests(struct afs_net *, struct afs_server_list *);
838 static inline struct afs_cb_interest *afs_get_cb_interest(struct afs_cb_interest *cbi)
841 refcount_inc(&cbi->usage);
845 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode)
847 return vnode->cb_break + vnode->cb_v_break;
850 static inline bool afs_cb_is_broken(unsigned int cb_break,
851 const struct afs_vnode *vnode,
852 const struct afs_cb_interest *cbi)
854 return !cbi || cb_break != (vnode->cb_break +
855 vnode->volume->cb_v_break);
861 extern int afs_cell_init(struct afs_net *, const char *);
862 extern struct afs_cell *afs_lookup_cell_rcu(struct afs_net *, const char *, unsigned);
863 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned,
865 extern struct afs_cell *afs_get_cell(struct afs_cell *);
866 extern void afs_put_cell(struct afs_net *, struct afs_cell *);
867 extern void afs_manage_cells(struct work_struct *);
868 extern void afs_cells_timer(struct timer_list *);
869 extern void __net_exit afs_cell_purge(struct afs_net *);
874 extern bool afs_cm_incoming_call(struct afs_call *);
879 extern const struct file_operations afs_dir_file_operations;
880 extern const struct inode_operations afs_dir_inode_operations;
881 extern const struct address_space_operations afs_dir_aops;
882 extern const struct dentry_operations afs_fs_dentry_operations;
884 extern void afs_d_release(struct dentry *);
885 extern int afs_dir_remove_link(struct dentry *, struct key *, unsigned long, unsigned long);
890 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *,
891 enum afs_edit_dir_reason);
892 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason);
897 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *,
898 struct dentry *, struct key *);
899 extern int afs_silly_iput(struct dentry *, struct inode *);
904 extern const struct file_operations afs_dynroot_file_operations;
905 extern const struct inode_operations afs_dynroot_inode_operations;
906 extern const struct dentry_operations afs_dynroot_dentry_operations;
908 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *);
909 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *);
910 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *);
911 extern int afs_dynroot_populate(struct super_block *);
912 extern void afs_dynroot_depopulate(struct super_block *);
917 extern const struct address_space_operations afs_fs_aops;
918 extern const struct inode_operations afs_file_inode_operations;
919 extern const struct file_operations afs_file_operations;
921 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *);
922 extern void afs_put_wb_key(struct afs_wb_key *);
923 extern int afs_open(struct inode *, struct file *);
924 extern int afs_release(struct inode *, struct file *);
925 extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *);
926 extern int afs_page_filler(void *, struct page *);
927 extern void afs_put_read(struct afs_read *);
932 extern struct workqueue_struct *afs_lock_manager;
934 extern void afs_lock_op_done(struct afs_call *);
935 extern void afs_lock_work(struct work_struct *);
936 extern void afs_lock_may_be_available(struct afs_vnode *);
937 extern int afs_lock(struct file *, int, struct file_lock *);
938 extern int afs_flock(struct file *, int, struct file_lock *);
943 #define AFS_VNODE_NOT_YET_SET 0x01
944 #define AFS_VNODE_META_CHANGED 0x02
945 #define AFS_VNODE_DATA_CHANGED 0x04
946 extern void afs_update_inode_from_status(struct afs_vnode *, struct afs_file_status *,
947 const afs_dataversion_t *, u8);
949 extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *, bool);
950 extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *);
951 extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *);
952 extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t, u64,
953 struct afs_fid *, struct afs_file_status *, struct afs_callback *);
954 extern int afs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool, u64);
955 extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64);
956 extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, u64,
957 struct afs_fid *, struct afs_file_status *);
958 extern int afs_fs_rename(struct afs_fs_cursor *, const char *,
959 struct afs_vnode *, const char *, u64, u64);
960 extern int afs_fs_store_data(struct afs_fs_cursor *, struct address_space *,
961 pgoff_t, pgoff_t, unsigned, unsigned);
962 extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *);
963 extern int afs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *);
964 extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t);
965 extern int afs_fs_extend_lock(struct afs_fs_cursor *);
966 extern int afs_fs_release_lock(struct afs_fs_cursor *);
967 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *,
968 struct afs_addr_cursor *, struct key *);
969 extern struct afs_call *afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
970 struct afs_addr_cursor *, struct key *,
972 extern int afs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *,
973 struct afs_fid *, struct afs_file_status *,
974 struct afs_callback *, unsigned int,
975 struct afs_volsync *);
976 extern int afs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *,
977 struct afs_fid *, struct afs_file_status *,
978 struct afs_callback *, struct afs_volsync *);
985 extern struct afs_acl *afs_fs_fetch_acl(struct afs_fs_cursor *);
986 extern int afs_fs_store_acl(struct afs_fs_cursor *, const struct afs_acl *);
991 extern void afs_fileserver_probe_result(struct afs_call *);
992 extern int afs_probe_fileservers(struct afs_net *, struct key *, struct afs_server_list *);
993 extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long);
998 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool);
999 extern int afs_iget5_test(struct inode *, void *);
1000 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool);
1001 extern struct inode *afs_iget(struct super_block *, struct key *,
1002 struct afs_fid *, struct afs_file_status *,
1003 struct afs_callback *,
1004 struct afs_cb_interest *,
1005 struct afs_vnode *);
1006 extern void afs_zap_data(struct afs_vnode *);
1007 extern int afs_validate(struct afs_vnode *, struct key *);
1008 extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int);
1009 extern int afs_setattr(struct dentry *, struct iattr *);
1010 extern void afs_evict_inode(struct inode *);
1011 extern int afs_drop_inode(struct inode *);
1016 extern struct workqueue_struct *afs_wq;
1017 extern int afs_net_id;
1019 static inline struct afs_net *afs_net(struct net *net)
1021 return net_generic(net, afs_net_id);
1024 static inline struct afs_net *afs_sb2net(struct super_block *sb)
1026 return afs_net(AFS_FS_S(sb)->net_ns);
1029 static inline struct afs_net *afs_d2net(struct dentry *dentry)
1031 return afs_sb2net(dentry->d_sb);
1034 static inline struct afs_net *afs_i2net(struct inode *inode)
1036 return afs_sb2net(inode->i_sb);
1039 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
1041 return afs_i2net(&vnode->vfs_inode);
1044 static inline struct afs_net *afs_sock2net(struct sock *sk)
1046 return net_generic(sock_net(sk), afs_net_id);
1049 static inline void __afs_stat(atomic_t *s)
1054 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n)
1059 extern int afs_abort_to_error(u32);
1060 extern void afs_prioritise_error(struct afs_error *, int, u32);
1065 extern const struct inode_operations afs_mntpt_inode_operations;
1066 extern const struct inode_operations afs_autocell_inode_operations;
1067 extern const struct file_operations afs_mntpt_file_operations;
1069 extern struct vfsmount *afs_d_automount(struct path *);
1070 extern void afs_mntpt_kill_timer(void);
1075 extern int afs_get_ipv4_interfaces(struct afs_net *, struct afs_interface *,
1081 #ifdef CONFIG_PROC_FS
1082 extern int __net_init afs_proc_init(struct afs_net *);
1083 extern void __net_exit afs_proc_cleanup(struct afs_net *);
1084 extern int afs_proc_cell_setup(struct afs_cell *);
1085 extern void afs_proc_cell_remove(struct afs_cell *);
1086 extern void afs_put_sysnames(struct afs_sysnames *);
1088 static inline int afs_proc_init(struct afs_net *net) { return 0; }
1089 static inline void afs_proc_cleanup(struct afs_net *net) {}
1090 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; }
1091 static inline void afs_proc_cell_remove(struct afs_cell *cell) {}
1092 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {}
1098 extern bool afs_begin_vnode_operation(struct afs_fs_cursor *, struct afs_vnode *,
1100 extern bool afs_select_fileserver(struct afs_fs_cursor *);
1101 extern bool afs_select_current_fileserver(struct afs_fs_cursor *);
1102 extern int afs_end_vnode_operation(struct afs_fs_cursor *);
1107 extern struct workqueue_struct *afs_async_calls;
1109 extern int __net_init afs_open_socket(struct afs_net *);
1110 extern void __net_exit afs_close_socket(struct afs_net *);
1111 extern void afs_charge_preallocation(struct work_struct *);
1112 extern void afs_put_call(struct afs_call *);
1113 extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t);
1114 extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *);
1115 extern struct afs_call *afs_alloc_flat_call(struct afs_net *,
1116 const struct afs_call_type *,
1118 extern void afs_flat_call_destructor(struct afs_call *);
1119 extern void afs_send_empty_reply(struct afs_call *);
1120 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
1121 extern int afs_extract_data(struct afs_call *, bool);
1122 extern int afs_protocol_error(struct afs_call *, int, enum afs_eproto_cause);
1124 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size)
1126 call->kvec[0].iov_base = buf;
1127 call->kvec[0].iov_len = size;
1128 iov_iter_kvec(&call->iter, READ, call->kvec, 1, size);
1131 static inline void afs_extract_to_tmp(struct afs_call *call)
1133 afs_extract_begin(call, &call->tmp, sizeof(call->tmp));
1136 static inline void afs_extract_to_tmp64(struct afs_call *call)
1138 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64));
1141 static inline void afs_extract_discard(struct afs_call *call, size_t size)
1143 iov_iter_discard(&call->iter, READ, size);
1146 static inline void afs_extract_to_buf(struct afs_call *call, size_t size)
1148 afs_extract_begin(call, call->buffer, size);
1151 static inline int afs_transfer_reply(struct afs_call *call)
1153 return afs_extract_data(call, false);
1156 static inline bool afs_check_call_state(struct afs_call *call,
1157 enum afs_call_state state)
1159 return READ_ONCE(call->state) == state;
1162 static inline bool afs_set_call_state(struct afs_call *call,
1163 enum afs_call_state from,
1164 enum afs_call_state to)
1168 spin_lock_bh(&call->state_lock);
1169 if (call->state == from) {
1171 trace_afs_call_state(call, from, to, 0, 0);
1174 spin_unlock_bh(&call->state_lock);
1178 static inline void afs_set_call_complete(struct afs_call *call,
1179 int error, u32 remote_abort)
1181 enum afs_call_state state;
1184 spin_lock_bh(&call->state_lock);
1185 state = call->state;
1186 if (state != AFS_CALL_COMPLETE) {
1187 call->abort_code = remote_abort;
1188 call->error = error;
1189 call->state = AFS_CALL_COMPLETE;
1190 trace_afs_call_state(call, state, AFS_CALL_COMPLETE,
1191 error, remote_abort);
1194 spin_unlock_bh(&call->state_lock);
1196 trace_afs_call_done(call);
1202 extern void afs_put_permits(struct afs_permits *);
1203 extern void afs_clear_permits(struct afs_vnode *);
1204 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int);
1205 extern void afs_zap_permits(struct rcu_head *);
1206 extern struct key *afs_request_key(struct afs_cell *);
1207 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *);
1208 extern int afs_permission(struct inode *, int);
1209 extern void __exit afs_clean_up_permit_cache(void);
1214 extern spinlock_t afs_server_peer_lock;
1216 static inline struct afs_server *afs_get_server(struct afs_server *server)
1218 atomic_inc(&server->usage);
1222 extern struct afs_server *afs_find_server(struct afs_net *,
1223 const struct sockaddr_rxrpc *);
1224 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *);
1225 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *);
1226 extern void afs_put_server(struct afs_net *, struct afs_server *);
1227 extern void afs_manage_servers(struct work_struct *);
1228 extern void afs_servers_timer(struct timer_list *);
1229 extern void __net_exit afs_purge_servers(struct afs_net *);
1230 extern bool afs_check_server_record(struct afs_fs_cursor *, struct afs_server *);
1235 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist)
1237 refcount_inc(&slist->usage);
1241 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *);
1242 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *,
1243 struct afs_vldb_entry *,
1245 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *);
1250 extern int __init afs_fs_init(void);
1251 extern void afs_fs_exit(void);
1256 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *,
1258 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *);
1259 extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *,
1260 struct key *, struct afs_vlserver *, unsigned int);
1261 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *);
1266 extern void afs_vlserver_probe_result(struct afs_call *);
1267 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *);
1268 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long);
1273 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *,
1274 struct afs_cell *, struct key *);
1275 extern bool afs_select_vlserver(struct afs_vl_cursor *);
1276 extern bool afs_select_current_vlserver(struct afs_vl_cursor *);
1277 extern int afs_end_vlserver_operation(struct afs_vl_cursor *);
1282 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver)
1284 atomic_inc(&vlserver->usage);
1288 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist)
1291 atomic_inc(&vllist->usage);
1295 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short);
1296 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *);
1297 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int);
1298 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *);
1299 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *,
1300 const void *, size_t);
1305 static inline struct afs_volume *__afs_get_volume(struct afs_volume *volume)
1308 atomic_inc(&volume->usage);
1312 extern struct afs_volume *afs_create_volume(struct afs_fs_context *);
1313 extern void afs_activate_volume(struct afs_volume *);
1314 extern void afs_deactivate_volume(struct afs_volume *);
1315 extern void afs_put_volume(struct afs_cell *, struct afs_volume *);
1316 extern int afs_check_volume_status(struct afs_volume *, struct key *);
1321 extern int afs_set_page_dirty(struct page *);
1322 extern int afs_write_begin(struct file *file, struct address_space *mapping,
1323 loff_t pos, unsigned len, unsigned flags,
1324 struct page **pagep, void **fsdata);
1325 extern int afs_write_end(struct file *file, struct address_space *mapping,
1326 loff_t pos, unsigned len, unsigned copied,
1327 struct page *page, void *fsdata);
1328 extern int afs_writepage(struct page *, struct writeback_control *);
1329 extern int afs_writepages(struct address_space *, struct writeback_control *);
1330 extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *);
1331 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *);
1332 extern int afs_fsync(struct file *, loff_t, loff_t, int);
1333 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf);
1334 extern void afs_prune_wb_keys(struct afs_vnode *);
1335 extern int afs_launder_page(struct page *);
1340 extern const struct xattr_handler *afs_xattr_handlers[];
1341 extern ssize_t afs_listxattr(struct dentry *, char *, size_t);
1346 extern int yfs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *, bool);
1347 extern int yfs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *);
1348 extern int yfs_fs_create_file(struct afs_fs_cursor *, const char *, umode_t, u64,
1349 struct afs_fid *, struct afs_file_status *, struct afs_callback *);
1350 extern int yfs_fs_make_dir(struct afs_fs_cursor *, const char *, umode_t, u64,
1351 struct afs_fid *, struct afs_file_status *, struct afs_callback *);
1352 extern int yfs_fs_remove_file2(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64);
1353 extern int yfs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool, u64);
1354 extern int yfs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64);
1355 extern int yfs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, u64,
1356 struct afs_fid *, struct afs_file_status *);
1357 extern int yfs_fs_rename(struct afs_fs_cursor *, const char *,
1358 struct afs_vnode *, const char *, u64, u64);
1359 extern int yfs_fs_store_data(struct afs_fs_cursor *, struct address_space *,
1360 pgoff_t, pgoff_t, unsigned, unsigned);
1361 extern int yfs_fs_setattr(struct afs_fs_cursor *, struct iattr *);
1362 extern int yfs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *);
1363 extern int yfs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t);
1364 extern int yfs_fs_extend_lock(struct afs_fs_cursor *);
1365 extern int yfs_fs_release_lock(struct afs_fs_cursor *);
1366 extern int yfs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *,
1367 struct afs_fid *, struct afs_file_status *,
1368 struct afs_callback *, struct afs_volsync *);
1369 extern int yfs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *,
1370 struct afs_fid *, struct afs_file_status *,
1371 struct afs_callback *, unsigned int,
1372 struct afs_volsync *);
1375 struct afs_acl *acl; /* Dir/file/symlink ACL */
1376 struct afs_acl *vol_acl; /* Whole volume ACL */
1377 u32 inherit_flag; /* True if ACL is inherited from parent dir */
1378 u32 num_cleaned; /* Number of ACEs removed due to subject removal */
1380 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */
1381 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */
1384 extern void yfs_free_opaque_acl(struct yfs_acl *);
1385 extern struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *, unsigned int);
1388 * Miscellaneous inline functions.
1390 static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
1392 return container_of(inode, struct afs_vnode, vfs_inode);
1395 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
1397 return &vnode->vfs_inode;
1400 static inline void afs_vnode_commit_status(struct afs_fs_cursor *fc,
1401 struct afs_vnode *vnode,
1402 unsigned int cb_break)
1404 if (fc->ac.error == 0)
1405 afs_cache_permit(vnode, fc->key, cb_break);
1408 static inline void afs_check_for_remote_deletion(struct afs_fs_cursor *fc,
1409 struct afs_vnode *vnode)
1411 if (fc->ac.error == -ENOENT) {
1412 set_bit(AFS_VNODE_DELETED, &vnode->flags);
1413 afs_break_callback(vnode);
1417 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where)
1419 trace_afs_io_error(call->debug_id, -EIO, where);
1423 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where)
1425 trace_afs_file_error(vnode, -EIO, where);
1429 /*****************************************************************************/
1433 extern unsigned afs_debug;
1435 #define dbgprintk(FMT,...) \
1436 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1438 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1439 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1440 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1443 #if defined(__KDEBUG)
1444 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1445 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1446 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1448 #elif defined(CONFIG_AFS_DEBUG)
1449 #define AFS_DEBUG_KENTER 0x01
1450 #define AFS_DEBUG_KLEAVE 0x02
1451 #define AFS_DEBUG_KDEBUG 0x04
1453 #define _enter(FMT,...) \
1455 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
1456 kenter(FMT,##__VA_ARGS__); \
1459 #define _leave(FMT,...) \
1461 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
1462 kleave(FMT,##__VA_ARGS__); \
1465 #define _debug(FMT,...) \
1467 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
1468 kdebug(FMT,##__VA_ARGS__); \
1472 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1473 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1474 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1478 * debug assertion checking
1480 #if 1 // defined(__KDEBUGALL)
1484 if (unlikely(!(X))) { \
1485 printk(KERN_ERR "\n"); \
1486 printk(KERN_ERR "AFS: Assertion failed\n"); \
1491 #define ASSERTCMP(X, OP, Y) \
1493 if (unlikely(!((X) OP (Y)))) { \
1494 printk(KERN_ERR "\n"); \
1495 printk(KERN_ERR "AFS: Assertion failed\n"); \
1496 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1497 (unsigned long)(X), (unsigned long)(Y)); \
1498 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1499 (unsigned long)(X), (unsigned long)(Y)); \
1504 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1506 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \
1507 printk(KERN_ERR "\n"); \
1508 printk(KERN_ERR "AFS: Assertion failed\n"); \
1509 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \
1510 (unsigned long)(L), (unsigned long)(N), \
1511 (unsigned long)(H)); \
1512 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
1513 (unsigned long)(L), (unsigned long)(N), \
1514 (unsigned long)(H)); \
1519 #define ASSERTIF(C, X) \
1521 if (unlikely((C) && !(X))) { \
1522 printk(KERN_ERR "\n"); \
1523 printk(KERN_ERR "AFS: Assertion failed\n"); \
1528 #define ASSERTIFCMP(C, X, OP, Y) \
1530 if (unlikely((C) && !((X) OP (Y)))) { \
1531 printk(KERN_ERR "\n"); \
1532 printk(KERN_ERR "AFS: Assertion failed\n"); \
1533 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1534 (unsigned long)(X), (unsigned long)(Y)); \
1535 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1536 (unsigned long)(X), (unsigned long)(Y)); \
1547 #define ASSERTCMP(X, OP, Y) \
1551 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1555 #define ASSERTIF(C, X) \
1559 #define ASSERTIFCMP(C, X, OP, Y) \
1563 #endif /* __KDEBUGALL */