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 int max_lifespan; /* Maximum lifespan to set if not 0 */
135 unsigned request_size; /* size of request data */
136 unsigned reply_max; /* maximum size of reply */
137 unsigned first_offset; /* offset into mapping[first] */
138 unsigned int cb_break; /* cb_break + cb_s_break before the call */
140 unsigned last_to; /* amount of mapping[last] */
141 unsigned count2; /* count used in unmarshalling */
143 unsigned char unmarshall; /* unmarshalling phase */
144 unsigned char addr_ix; /* Address in ->alist */
145 bool incoming; /* T if incoming call */
146 bool send_pages; /* T if data from mapping should be sent */
147 bool need_attention; /* T if RxRPC poked us */
148 bool async; /* T if asynchronous */
149 bool ret_reply0; /* T if should return reply[0] on success */
150 bool upgrade; /* T to request service upgrade */
151 bool want_reply_time; /* T if want reply_time */
152 bool intr; /* T if interruptible */
153 u16 service_id; /* Actual service ID (after upgrade) */
154 unsigned int debug_id; /* Trace ID */
155 u32 operation_ID; /* operation ID for an incoming call */
156 u32 count; /* count for use in unmarshalling */
157 union { /* place to extract temporary data */
161 } __attribute__((packed));
164 afs_dataversion_t expected_version; /* Updated version expected from store */
165 afs_dataversion_t expected_version_2; /* 2nd updated version expected from store */
166 ktime_t reply_time; /* Time of first reply packet */
169 struct afs_call_type {
171 unsigned int op; /* Really enum afs_fs_operation */
173 /* deliver request or reply data to an call
174 * - returning an error will cause the call to be aborted
176 int (*deliver)(struct afs_call *call);
178 /* clean up a call */
179 void (*destructor)(struct afs_call *call);
182 void (*work)(struct work_struct *work);
184 /* Call done function (gets called immediately on success or failure) */
185 void (*done)(struct afs_call *call);
189 * Key available for writeback on a file.
194 struct list_head vnode_link; /* Link in vnode->wb_keys */
198 * AFS open file information record. Pointed to by file->private_data.
201 struct key *key; /* The key this file was opened with */
202 struct afs_wb_key *wb; /* Writeback key record for this file */
205 static inline struct key *afs_file_key(struct file *file)
207 struct afs_file *af = file->private_data;
213 * Record of an outstanding read operation on a vnode.
216 loff_t pos; /* Where to start reading */
217 loff_t len; /* How much we're asking for */
218 loff_t actual_len; /* How much we're actually getting */
219 loff_t remain; /* Amount remaining */
220 loff_t file_size; /* File size returned by server */
221 afs_dataversion_t data_version; /* Version number returned by server */
223 unsigned int index; /* Which page we're reading into */
224 unsigned int nr_pages;
225 unsigned int offset; /* offset into current page */
226 void (*page_done)(struct afs_call *, struct afs_read *);
228 struct page *array[];
232 * AFS superblock private data
233 * - there's one superblock per volume
235 struct afs_super_info {
236 struct net *net_ns; /* Network namespace */
237 struct afs_cell *cell; /* The cell in which the volume resides */
238 struct afs_volume *volume; /* volume record */
239 enum afs_flock_mode flock_mode:8; /* File locking emulation mode */
240 bool dyn_root; /* True if dynamic root */
243 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
245 return sb->s_fs_info;
248 extern struct file_system_type afs_fs_type;
251 * Set of substitutes for @sys.
253 struct afs_sysnames {
254 #define AFS_NR_SYSNAME 16
255 char *subs[AFS_NR_SYSNAME];
262 * AFS network namespace record.
265 struct net *net; /* Backpointer to the owning net namespace */
266 struct afs_uuid uuid;
267 bool live; /* F if this namespace is being removed */
269 /* AF_RXRPC I/O stuff */
270 struct socket *socket;
271 struct afs_call *spare_incoming_call;
272 struct work_struct charge_preallocation_work;
273 struct mutex socket_mutex;
274 atomic_t nr_outstanding_calls;
275 atomic_t nr_superblocks;
278 struct rb_root cells;
279 struct afs_cell __rcu *ws_cell;
280 struct work_struct cells_manager;
281 struct timer_list cells_timer;
282 atomic_t cells_outstanding;
283 seqlock_t cells_lock;
285 struct mutex proc_cells_lock;
286 struct hlist_head proc_cells;
288 /* Known servers. Theoretically each fileserver can only be in one
289 * cell, but in practice, people create aliases and subsets and there's
290 * no easy way to distinguish them.
292 seqlock_t fs_lock; /* For fs_servers */
293 struct rb_root fs_servers; /* afs_server (by server UUID or address) */
294 struct list_head fs_updates; /* afs_server (by update_at) */
295 struct hlist_head fs_proc; /* procfs servers list */
297 struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */
298 struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */
299 seqlock_t fs_addr_lock; /* For fs_addresses[46] */
301 struct work_struct fs_manager;
302 struct timer_list fs_timer;
303 atomic_t servers_outstanding;
305 /* File locking renewal management */
306 struct mutex lock_manager_mutex;
309 struct super_block *dynroot_sb; /* Dynamic root mount superblock */
310 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */
311 struct afs_sysnames *sysnames;
312 rwlock_t sysnames_lock;
314 /* Statistics counters */
315 atomic_t n_lookup; /* Number of lookups done */
316 atomic_t n_reval; /* Number of dentries needing revalidation */
317 atomic_t n_inval; /* Number of invalidations by the server */
318 atomic_t n_relpg; /* Number of invalidations by releasepage */
319 atomic_t n_read_dir; /* Number of directory pages read */
320 atomic_t n_dir_cr; /* Number of directory entry creation edits */
321 atomic_t n_dir_rm; /* Number of directory entry removal edits */
322 atomic_t n_stores; /* Number of store ops */
323 atomic_long_t n_store_bytes; /* Number of bytes stored */
324 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */
325 atomic_t n_fetches; /* Number of data fetch ops */
328 extern const char afs_init_sysname[];
330 enum afs_cell_state {
334 AFS_CELL_DEACTIVATING,
342 * This is a tricky concept to get right as it is possible to create aliases
343 * simply by pointing AFSDB/SRV records for two names at the same set of VL
344 * servers; it is also possible to do things like setting up two sets of VL
345 * servers, one of which provides a superset of the volumes provided by the
346 * other (for internal/external division, for example).
348 * Cells only exist in the sense that (a) a cell's name maps to a set of VL
349 * servers and (b) a cell's name is used by the client to select the key to use
350 * for authentication and encryption. The cell name is not typically used in
353 * There is no easy way to determine if two cells are aliases or one is a
359 struct rb_node net_node; /* Node in net->cells */
362 struct key *anonymous_key; /* anonymous user key for this cell */
363 struct work_struct manager; /* Manager for init/deinit/dns */
364 struct hlist_node proc_link; /* /proc cell list link */
365 #ifdef CONFIG_AFS_FSCACHE
366 struct fscache_cookie *cache; /* caching cookie */
368 time64_t dns_expiry; /* Time AFSDB/SRV record expires */
369 time64_t last_inactive; /* Time of last drop of usage count */
372 #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */
373 #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */
374 enum afs_cell_state state;
376 enum dns_record_source dns_source:8; /* Latest source of data from lookup */
377 enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */
378 unsigned int dns_lookup_count; /* Counter of DNS lookups */
380 /* Active fileserver interaction state. */
381 struct list_head proc_volumes; /* procfs volume list */
384 /* VL server list. */
385 rwlock_t vl_servers_lock; /* Lock on vl_servers */
386 struct afs_vlserver_list __rcu *vl_servers;
388 u8 name_len; /* Length of name */
389 char name[64 + 1]; /* Cell name, case-flattened and NUL-padded */
393 * Volume Location server record.
395 struct afs_vlserver {
397 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */
399 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */
400 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */
401 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */
402 rwlock_t lock; /* Lock on addresses */
406 wait_queue_head_t probe_wq;
407 atomic_t probe_outstanding;
408 spinlock_t probe_lock;
410 unsigned int rtt; /* RTT as ktime/64 */
417 bool local_failure:1;
421 u16 name_len; /* Length of name */
422 char name[]; /* Server name, case-flattened */
426 * Weighted list of Volume Location servers.
428 struct afs_vlserver_entry {
429 u16 priority; /* Preference (as SRV) */
430 u16 weight; /* Weight (as SRV) */
431 enum dns_record_source source:8;
432 enum dns_lookup_status status:8;
433 struct afs_vlserver *server;
436 struct afs_vlserver_list {
440 u8 index; /* Server currently in use */
441 u8 preferred; /* Preferred server */
442 enum dns_record_source source:8;
443 enum dns_lookup_status status:8;
445 struct afs_vlserver_entry servers[];
451 * This is pointed to by cell->vldb_entries, indexed by name.
453 struct afs_vldb_entry {
454 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */
457 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */
458 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */
459 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */
460 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */
461 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */
463 uuid_t fs_server[AFS_NMAXNSERVERS];
464 u8 fs_mask[AFS_NMAXNSERVERS];
465 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */
466 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */
467 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */
469 u8 nr_servers; /* Number of server records */
471 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
475 * Record of fileserver with which we're actively communicating.
480 uuid_t uuid; /* Server ID */
481 struct afs_uuid _uuid;
484 struct afs_addr_list __rcu *addresses;
485 struct rb_node uuid_rb; /* Link in net->servers */
486 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */
487 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */
488 struct hlist_node proc_link; /* Link in net->fs_proc */
489 struct afs_server *gc_next; /* Next server in manager's list */
490 time64_t put_time; /* Time at which last put */
491 time64_t update_at; /* Time at which to next update the record */
493 #define AFS_SERVER_FL_NOT_READY 1 /* The record is not ready for use */
494 #define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */
495 #define AFS_SERVER_FL_VL_FAIL 3 /* Failed to access VL server */
496 #define AFS_SERVER_FL_UPDATING 4
497 #define AFS_SERVER_FL_PROBED 5 /* The fileserver has been probed */
498 #define AFS_SERVER_FL_PROBING 6 /* Fileserver is being probed */
499 #define AFS_SERVER_FL_NO_IBULK 7 /* Fileserver doesn't support FS.InlineBulkStatus */
500 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */
501 #define AFS_SERVER_FL_IS_YFS 9 /* Server is YFS not AFS */
502 #define AFS_SERVER_FL_NO_RM2 10 /* Fileserver doesn't support YFS.RemoveFile2 */
503 #define AFS_SERVER_FL_HAVE_EPOCH 11 /* ->epoch is valid */
505 u32 addr_version; /* Address list version */
506 u32 cm_epoch; /* Server RxRPC epoch */
508 /* file service access */
509 rwlock_t fs_lock; /* access lock */
511 /* callback promise management */
512 struct hlist_head cb_volumes; /* List of volume interests on this server */
513 unsigned cb_s_break; /* Break-everything counter. */
514 rwlock_t cb_break_lock; /* Volume finding lock */
517 wait_queue_head_t probe_wq;
518 atomic_t probe_outstanding;
519 spinlock_t probe_lock;
521 unsigned int rtt; /* RTT as ktime/64 */
529 bool local_failure:1;
532 bool said_rebooted:1;
533 bool said_inconsistent:1;
538 * Volume collation in the server's callback interest list.
540 struct afs_vol_interest {
541 struct hlist_node srv_link; /* Link in server->cb_volumes */
542 struct hlist_head cb_interests; /* List of callback interests on the server */
543 afs_volid_t vid; /* Volume ID to match */
548 * Interest by a superblock on a server.
550 struct afs_cb_interest {
551 struct hlist_node cb_vlink; /* Link in vol_interest->cb_interests */
552 struct afs_vol_interest *vol_interest;
553 struct afs_server *server; /* Server on which this interest resides */
554 struct super_block *sb; /* Superblock on which inodes reside */
555 afs_volid_t vid; /* Volume ID to match */
560 * Replaceable server list.
562 struct afs_server_entry {
563 struct afs_server *server;
564 struct afs_cb_interest *cb_interest;
567 struct afs_server_list {
569 unsigned char nr_servers;
570 unsigned char preferred; /* Preferred server */
571 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */
572 unsigned int seq; /* Set to ->servers_seq when installed */
574 struct afs_server_entry servers[];
578 * Live AFS volume management.
581 afs_volid_t vid; /* volume ID */
583 time64_t update_at; /* Time at which to next update */
584 struct afs_cell *cell; /* Cell to which belongs (pins ref) */
585 struct list_head proc_link; /* Link in cell->vl_proc */
587 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */
588 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */
589 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */
590 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */
591 #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */
592 #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */
593 #ifdef CONFIG_AFS_FSCACHE
594 struct fscache_cookie *cache; /* caching cookie */
596 struct afs_server_list *servers; /* List of servers on which volume resides */
597 rwlock_t servers_lock; /* Lock for ->servers */
598 unsigned int servers_seq; /* Incremented each time ->servers changes */
600 unsigned cb_v_break; /* Break-everything counter. */
601 rwlock_t cb_break_lock;
603 afs_voltype_t type; /* type of volume */
605 char type_force; /* force volume type (suppress R/O -> R/W) */
607 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
610 enum afs_lock_state {
611 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */
612 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */
613 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */
614 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */
615 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */
616 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */
617 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */
618 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */
622 * AFS inode private data.
624 * Note that afs_alloc_inode() *must* reset anything that could incorrectly
625 * leak from one inode to another.
628 struct inode vfs_inode; /* the VFS's inode record */
630 struct afs_volume *volume; /* volume on which vnode resides */
631 struct afs_fid fid; /* the file identifier for this inode */
632 struct afs_file_status status; /* AFS status info for this file */
633 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */
634 #ifdef CONFIG_AFS_FSCACHE
635 struct fscache_cookie *cache; /* caching cookie */
637 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */
638 struct mutex io_lock; /* Lock for serialising I/O on this mutex */
639 struct rw_semaphore validate_lock; /* lock for validating this vnode */
640 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */
641 struct key *silly_key; /* Silly rename key */
642 spinlock_t wb_lock; /* lock for wb_keys */
643 spinlock_t lock; /* waitqueue/flags lock */
645 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */
646 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */
647 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */
648 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */
649 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */
650 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */
651 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */
652 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */
653 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */
655 struct list_head wb_keys; /* List of keys available for writeback */
656 struct list_head pending_locks; /* locks waiting to be granted */
657 struct list_head granted_locks; /* locks granted on this file */
658 struct delayed_work lock_work; /* work to be done in locking */
659 struct key *lock_key; /* Key to be used in lock ops */
660 ktime_t locked_at; /* Time at which lock obtained */
661 enum afs_lock_state lock_state : 8;
662 afs_lock_type_t lock_type : 8;
664 /* outstanding callback notification on this file */
665 struct afs_cb_interest *cb_interest; /* Server on which this resides */
666 unsigned int cb_s_break; /* Mass break counter on ->server */
667 unsigned int cb_v_break; /* Mass break counter on ->volume */
668 unsigned int cb_break; /* Break counter on vnode */
669 seqlock_t cb_lock; /* Lock for ->cb_interest, ->status, ->cb_*break */
671 time64_t cb_expires_at; /* time at which callback expires */
672 unsigned cb_version; /* callback version */
673 afs_callback_type_t cb_type; /* type of callback */
676 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode)
678 #ifdef CONFIG_AFS_FSCACHE
686 * cached security record for one user's attempt to access a vnode
689 struct key *key; /* RxRPC ticket holding a security context */
690 afs_access_t access; /* CallerAccess value for this key */
694 * Immutable cache of CallerAccess records from attempts to access vnodes.
695 * These may be shared between multiple vnodes.
699 struct hlist_node hash_node; /* Link in hash */
700 unsigned long h; /* Hash value for this permit list */
702 unsigned short nr_permits; /* Number of records */
703 bool invalidated; /* Invalidated due to key change */
704 struct afs_permit permits[]; /* List of permits sorted by key pointer */
708 * record of one of a system's set of network interfaces
710 struct afs_interface {
711 struct in_addr address; /* IPv4 address bound to interface */
712 struct in_addr netmask; /* netmask applied to address */
713 unsigned mtu; /* MTU of interface */
717 * Error prioritisation and accumulation.
720 short error; /* Accumulated error */
721 bool responded; /* T if server responded */
725 * Cursor for iterating over a server's address list.
727 struct afs_addr_cursor {
728 struct afs_addr_list *alist; /* Current address list (pins ref) */
729 unsigned long tried; /* Tried addresses */
730 signed char index; /* Current address */
731 bool responded; /* T if the current address responded */
732 unsigned short nr_iterations; /* Number of address iterations */
738 * Cursor for iterating over a set of volume location servers.
740 struct afs_vl_cursor {
741 struct afs_addr_cursor ac;
742 struct afs_cell *cell; /* The cell we're querying */
743 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */
744 struct afs_vlserver *server; /* Server on which this resides */
745 struct key *key; /* Key for the server */
746 unsigned long untried; /* Bitmask of untried servers */
747 short index; /* Current server */
749 unsigned short flags;
750 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */
751 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */
752 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */
753 unsigned short nr_iterations; /* Number of server iterations */
757 * Cursor for iterating over a set of fileservers.
759 struct afs_fs_cursor {
760 struct afs_addr_cursor ac;
761 struct afs_vnode *vnode;
762 struct afs_server_list *server_list; /* Current server list (pins ref) */
763 struct afs_cb_interest *cbi; /* Server on which this resides (pins ref) */
764 struct key *key; /* Key for the server */
765 unsigned long untried; /* Bitmask of untried servers */
766 unsigned int cb_break; /* cb_break + cb_s_break before the call */
767 unsigned int cb_break_2; /* cb_break + cb_s_break (2nd vnode) */
768 short index; /* Current server */
770 unsigned short flags;
771 #define AFS_FS_CURSOR_STOP 0x0001 /* Set to cease iteration */
772 #define AFS_FS_CURSOR_VBUSY 0x0002 /* Set if seen VBUSY */
773 #define AFS_FS_CURSOR_VMOVED 0x0004 /* Set if seen VMOVED */
774 #define AFS_FS_CURSOR_VNOVOL 0x0008 /* Set if seen VNOVOL */
775 #define AFS_FS_CURSOR_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */
776 #define AFS_FS_CURSOR_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */
777 #define AFS_FS_CURSOR_INTR 0x0040 /* Set if op is interruptible */
778 unsigned short nr_iterations; /* Number of server iterations */
782 * Cache auxiliary data.
784 struct afs_vnode_cache_aux {
788 #include <trace/events/afs.h>
790 /*****************************************************************************/
794 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist)
797 refcount_inc(&alist->usage);
800 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int,
803 extern void afs_put_addrlist(struct afs_addr_list *);
804 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *,
805 const char *, size_t, char,
806 unsigned short, unsigned short);
807 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *);
808 extern bool afs_iterate_addresses(struct afs_addr_cursor *);
809 extern int afs_end_cursor(struct afs_addr_cursor *);
811 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16);
812 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16);
817 #ifdef CONFIG_AFS_FSCACHE
818 extern struct fscache_netfs afs_cache_netfs;
819 extern struct fscache_cookie_def afs_cell_cache_index_def;
820 extern struct fscache_cookie_def afs_volume_cache_index_def;
821 extern struct fscache_cookie_def afs_vnode_cache_index_def;
823 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL)
824 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL)
825 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL)
831 extern void afs_init_callback_state(struct afs_server *);
832 extern void __afs_break_callback(struct afs_vnode *);
833 extern void afs_break_callback(struct afs_vnode *);
834 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break*);
836 extern int afs_register_server_cb_interest(struct afs_vnode *,
837 struct afs_server_list *, unsigned int);
838 extern void afs_put_cb_interest(struct afs_net *, struct afs_cb_interest *);
839 extern void afs_clear_callback_interests(struct afs_net *, struct afs_server_list *);
841 static inline struct afs_cb_interest *afs_get_cb_interest(struct afs_cb_interest *cbi)
844 refcount_inc(&cbi->usage);
848 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode)
850 return vnode->cb_break + vnode->cb_v_break;
853 static inline bool afs_cb_is_broken(unsigned int cb_break,
854 const struct afs_vnode *vnode,
855 const struct afs_cb_interest *cbi)
857 return !cbi || cb_break != (vnode->cb_break +
858 vnode->volume->cb_v_break);
864 extern int afs_cell_init(struct afs_net *, const char *);
865 extern struct afs_cell *afs_lookup_cell_rcu(struct afs_net *, const char *, unsigned);
866 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned,
868 extern struct afs_cell *afs_get_cell(struct afs_cell *);
869 extern void afs_put_cell(struct afs_net *, struct afs_cell *);
870 extern void afs_manage_cells(struct work_struct *);
871 extern void afs_cells_timer(struct timer_list *);
872 extern void __net_exit afs_cell_purge(struct afs_net *);
877 extern bool afs_cm_incoming_call(struct afs_call *);
882 extern const struct file_operations afs_dir_file_operations;
883 extern const struct inode_operations afs_dir_inode_operations;
884 extern const struct address_space_operations afs_dir_aops;
885 extern const struct dentry_operations afs_fs_dentry_operations;
887 extern void afs_d_release(struct dentry *);
888 extern int afs_dir_remove_link(struct dentry *, struct key *, unsigned long, unsigned long);
893 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *,
894 enum afs_edit_dir_reason);
895 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason);
900 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *,
901 struct dentry *, struct key *);
902 extern int afs_silly_iput(struct dentry *, struct inode *);
907 extern const struct file_operations afs_dynroot_file_operations;
908 extern const struct inode_operations afs_dynroot_inode_operations;
909 extern const struct dentry_operations afs_dynroot_dentry_operations;
911 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *);
912 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *);
913 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *);
914 extern int afs_dynroot_populate(struct super_block *);
915 extern void afs_dynroot_depopulate(struct super_block *);
920 extern const struct address_space_operations afs_fs_aops;
921 extern const struct inode_operations afs_file_inode_operations;
922 extern const struct file_operations afs_file_operations;
924 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *);
925 extern void afs_put_wb_key(struct afs_wb_key *);
926 extern int afs_open(struct inode *, struct file *);
927 extern int afs_release(struct inode *, struct file *);
928 extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *);
929 extern int afs_page_filler(void *, struct page *);
930 extern void afs_put_read(struct afs_read *);
935 extern struct workqueue_struct *afs_lock_manager;
937 extern void afs_lock_op_done(struct afs_call *);
938 extern void afs_lock_work(struct work_struct *);
939 extern void afs_lock_may_be_available(struct afs_vnode *);
940 extern int afs_lock(struct file *, int, struct file_lock *);
941 extern int afs_flock(struct file *, int, struct file_lock *);
946 #define AFS_VNODE_NOT_YET_SET 0x01
947 #define AFS_VNODE_META_CHANGED 0x02
948 #define AFS_VNODE_DATA_CHANGED 0x04
949 extern void afs_update_inode_from_status(struct afs_vnode *, struct afs_file_status *,
950 const afs_dataversion_t *, u8);
952 extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *, bool);
953 extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *);
954 extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *);
955 extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t, u64,
956 struct afs_fid *, struct afs_file_status *, struct afs_callback *);
957 extern int afs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool, u64);
958 extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64);
959 extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, u64,
960 struct afs_fid *, struct afs_file_status *);
961 extern int afs_fs_rename(struct afs_fs_cursor *, const char *,
962 struct afs_vnode *, const char *, u64, u64);
963 extern int afs_fs_store_data(struct afs_fs_cursor *, struct address_space *,
964 pgoff_t, pgoff_t, unsigned, unsigned);
965 extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *);
966 extern int afs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *);
967 extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t);
968 extern int afs_fs_extend_lock(struct afs_fs_cursor *);
969 extern int afs_fs_release_lock(struct afs_fs_cursor *);
970 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *,
971 struct afs_addr_cursor *, struct key *);
972 extern struct afs_call *afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
973 struct afs_addr_cursor *, struct key *,
975 extern int afs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *,
976 struct afs_fid *, struct afs_file_status *,
977 struct afs_callback *, unsigned int,
978 struct afs_volsync *);
979 extern int afs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *,
980 struct afs_fid *, struct afs_file_status *,
981 struct afs_callback *, struct afs_volsync *);
988 extern struct afs_acl *afs_fs_fetch_acl(struct afs_fs_cursor *);
989 extern int afs_fs_store_acl(struct afs_fs_cursor *, const struct afs_acl *);
994 extern void afs_fileserver_probe_result(struct afs_call *);
995 extern int afs_probe_fileservers(struct afs_net *, struct key *, struct afs_server_list *);
996 extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long);
1001 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool);
1002 extern int afs_iget5_test(struct inode *, void *);
1003 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool);
1004 extern struct inode *afs_iget(struct super_block *, struct key *,
1005 struct afs_fid *, struct afs_file_status *,
1006 struct afs_callback *,
1007 struct afs_cb_interest *,
1008 struct afs_vnode *);
1009 extern void afs_zap_data(struct afs_vnode *);
1010 extern int afs_validate(struct afs_vnode *, struct key *);
1011 extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int);
1012 extern int afs_setattr(struct dentry *, struct iattr *);
1013 extern void afs_evict_inode(struct inode *);
1014 extern int afs_drop_inode(struct inode *);
1019 extern struct workqueue_struct *afs_wq;
1020 extern int afs_net_id;
1022 static inline struct afs_net *afs_net(struct net *net)
1024 return net_generic(net, afs_net_id);
1027 static inline struct afs_net *afs_sb2net(struct super_block *sb)
1029 return afs_net(AFS_FS_S(sb)->net_ns);
1032 static inline struct afs_net *afs_d2net(struct dentry *dentry)
1034 return afs_sb2net(dentry->d_sb);
1037 static inline struct afs_net *afs_i2net(struct inode *inode)
1039 return afs_sb2net(inode->i_sb);
1042 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
1044 return afs_i2net(&vnode->vfs_inode);
1047 static inline struct afs_net *afs_sock2net(struct sock *sk)
1049 return net_generic(sock_net(sk), afs_net_id);
1052 static inline void __afs_stat(atomic_t *s)
1057 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n)
1062 extern int afs_abort_to_error(u32);
1063 extern void afs_prioritise_error(struct afs_error *, int, u32);
1068 extern const struct inode_operations afs_mntpt_inode_operations;
1069 extern const struct inode_operations afs_autocell_inode_operations;
1070 extern const struct file_operations afs_mntpt_file_operations;
1072 extern struct vfsmount *afs_d_automount(struct path *);
1073 extern void afs_mntpt_kill_timer(void);
1078 extern int afs_get_ipv4_interfaces(struct afs_net *, struct afs_interface *,
1084 #ifdef CONFIG_PROC_FS
1085 extern int __net_init afs_proc_init(struct afs_net *);
1086 extern void __net_exit afs_proc_cleanup(struct afs_net *);
1087 extern int afs_proc_cell_setup(struct afs_cell *);
1088 extern void afs_proc_cell_remove(struct afs_cell *);
1089 extern void afs_put_sysnames(struct afs_sysnames *);
1091 static inline int afs_proc_init(struct afs_net *net) { return 0; }
1092 static inline void afs_proc_cleanup(struct afs_net *net) {}
1093 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; }
1094 static inline void afs_proc_cell_remove(struct afs_cell *cell) {}
1095 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {}
1101 extern bool afs_begin_vnode_operation(struct afs_fs_cursor *, struct afs_vnode *,
1102 struct key *, bool);
1103 extern bool afs_select_fileserver(struct afs_fs_cursor *);
1104 extern bool afs_select_current_fileserver(struct afs_fs_cursor *);
1105 extern int afs_end_vnode_operation(struct afs_fs_cursor *);
1110 extern struct workqueue_struct *afs_async_calls;
1112 extern int __net_init afs_open_socket(struct afs_net *);
1113 extern void __net_exit afs_close_socket(struct afs_net *);
1114 extern void afs_charge_preallocation(struct work_struct *);
1115 extern void afs_put_call(struct afs_call *);
1116 extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t);
1117 extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *);
1118 extern struct afs_call *afs_alloc_flat_call(struct afs_net *,
1119 const struct afs_call_type *,
1121 extern void afs_flat_call_destructor(struct afs_call *);
1122 extern void afs_send_empty_reply(struct afs_call *);
1123 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
1124 extern int afs_extract_data(struct afs_call *, bool);
1125 extern int afs_protocol_error(struct afs_call *, int, enum afs_eproto_cause);
1127 static inline void afs_set_fc_call(struct afs_call *call, struct afs_fs_cursor *fc)
1129 call->intr = fc->flags & AFS_FS_CURSOR_INTR;
1132 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size)
1134 call->kvec[0].iov_base = buf;
1135 call->kvec[0].iov_len = size;
1136 iov_iter_kvec(&call->iter, READ, call->kvec, 1, size);
1139 static inline void afs_extract_to_tmp(struct afs_call *call)
1141 afs_extract_begin(call, &call->tmp, sizeof(call->tmp));
1144 static inline void afs_extract_to_tmp64(struct afs_call *call)
1146 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64));
1149 static inline void afs_extract_discard(struct afs_call *call, size_t size)
1151 iov_iter_discard(&call->iter, READ, size);
1154 static inline void afs_extract_to_buf(struct afs_call *call, size_t size)
1156 afs_extract_begin(call, call->buffer, size);
1159 static inline int afs_transfer_reply(struct afs_call *call)
1161 return afs_extract_data(call, false);
1164 static inline bool afs_check_call_state(struct afs_call *call,
1165 enum afs_call_state state)
1167 return READ_ONCE(call->state) == state;
1170 static inline bool afs_set_call_state(struct afs_call *call,
1171 enum afs_call_state from,
1172 enum afs_call_state to)
1176 spin_lock_bh(&call->state_lock);
1177 if (call->state == from) {
1179 trace_afs_call_state(call, from, to, 0, 0);
1182 spin_unlock_bh(&call->state_lock);
1186 static inline void afs_set_call_complete(struct afs_call *call,
1187 int error, u32 remote_abort)
1189 enum afs_call_state state;
1192 spin_lock_bh(&call->state_lock);
1193 state = call->state;
1194 if (state != AFS_CALL_COMPLETE) {
1195 call->abort_code = remote_abort;
1196 call->error = error;
1197 call->state = AFS_CALL_COMPLETE;
1198 trace_afs_call_state(call, state, AFS_CALL_COMPLETE,
1199 error, remote_abort);
1202 spin_unlock_bh(&call->state_lock);
1204 trace_afs_call_done(call);
1210 extern void afs_put_permits(struct afs_permits *);
1211 extern void afs_clear_permits(struct afs_vnode *);
1212 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int);
1213 extern void afs_zap_permits(struct rcu_head *);
1214 extern struct key *afs_request_key(struct afs_cell *);
1215 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *);
1216 extern int afs_permission(struct inode *, int);
1217 extern void __exit afs_clean_up_permit_cache(void);
1222 extern spinlock_t afs_server_peer_lock;
1224 static inline struct afs_server *afs_get_server(struct afs_server *server)
1226 atomic_inc(&server->usage);
1230 extern struct afs_server *afs_find_server(struct afs_net *,
1231 const struct sockaddr_rxrpc *);
1232 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *);
1233 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *);
1234 extern void afs_put_server(struct afs_net *, struct afs_server *);
1235 extern void afs_manage_servers(struct work_struct *);
1236 extern void afs_servers_timer(struct timer_list *);
1237 extern void __net_exit afs_purge_servers(struct afs_net *);
1238 extern bool afs_check_server_record(struct afs_fs_cursor *, struct afs_server *);
1243 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist)
1245 refcount_inc(&slist->usage);
1249 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *);
1250 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *,
1251 struct afs_vldb_entry *,
1253 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *);
1258 extern int __init afs_fs_init(void);
1259 extern void afs_fs_exit(void);
1264 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *,
1266 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *);
1267 extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *,
1268 struct key *, struct afs_vlserver *, unsigned int);
1269 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *);
1274 extern void afs_vlserver_probe_result(struct afs_call *);
1275 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *);
1276 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long);
1281 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *,
1282 struct afs_cell *, struct key *);
1283 extern bool afs_select_vlserver(struct afs_vl_cursor *);
1284 extern bool afs_select_current_vlserver(struct afs_vl_cursor *);
1285 extern int afs_end_vlserver_operation(struct afs_vl_cursor *);
1290 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver)
1292 atomic_inc(&vlserver->usage);
1296 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist)
1299 atomic_inc(&vllist->usage);
1303 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short);
1304 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *);
1305 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int);
1306 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *);
1307 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *,
1308 const void *, size_t);
1313 static inline struct afs_volume *__afs_get_volume(struct afs_volume *volume)
1316 atomic_inc(&volume->usage);
1320 extern struct afs_volume *afs_create_volume(struct afs_fs_context *);
1321 extern void afs_activate_volume(struct afs_volume *);
1322 extern void afs_deactivate_volume(struct afs_volume *);
1323 extern void afs_put_volume(struct afs_cell *, struct afs_volume *);
1324 extern int afs_check_volume_status(struct afs_volume *, struct key *);
1329 extern int afs_set_page_dirty(struct page *);
1330 extern int afs_write_begin(struct file *file, struct address_space *mapping,
1331 loff_t pos, unsigned len, unsigned flags,
1332 struct page **pagep, void **fsdata);
1333 extern int afs_write_end(struct file *file, struct address_space *mapping,
1334 loff_t pos, unsigned len, unsigned copied,
1335 struct page *page, void *fsdata);
1336 extern int afs_writepage(struct page *, struct writeback_control *);
1337 extern int afs_writepages(struct address_space *, struct writeback_control *);
1338 extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *);
1339 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *);
1340 extern int afs_fsync(struct file *, loff_t, loff_t, int);
1341 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf);
1342 extern void afs_prune_wb_keys(struct afs_vnode *);
1343 extern int afs_launder_page(struct page *);
1348 extern const struct xattr_handler *afs_xattr_handlers[];
1349 extern ssize_t afs_listxattr(struct dentry *, char *, size_t);
1354 extern int yfs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *, bool);
1355 extern int yfs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *);
1356 extern int yfs_fs_create_file(struct afs_fs_cursor *, const char *, umode_t, u64,
1357 struct afs_fid *, struct afs_file_status *, struct afs_callback *);
1358 extern int yfs_fs_make_dir(struct afs_fs_cursor *, const char *, umode_t, u64,
1359 struct afs_fid *, struct afs_file_status *, struct afs_callback *);
1360 extern int yfs_fs_remove_file2(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64);
1361 extern int yfs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool, u64);
1362 extern int yfs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64);
1363 extern int yfs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, u64,
1364 struct afs_fid *, struct afs_file_status *);
1365 extern int yfs_fs_rename(struct afs_fs_cursor *, const char *,
1366 struct afs_vnode *, const char *, u64, u64);
1367 extern int yfs_fs_store_data(struct afs_fs_cursor *, struct address_space *,
1368 pgoff_t, pgoff_t, unsigned, unsigned);
1369 extern int yfs_fs_setattr(struct afs_fs_cursor *, struct iattr *);
1370 extern int yfs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *);
1371 extern int yfs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t);
1372 extern int yfs_fs_extend_lock(struct afs_fs_cursor *);
1373 extern int yfs_fs_release_lock(struct afs_fs_cursor *);
1374 extern int yfs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *,
1375 struct afs_fid *, struct afs_file_status *,
1376 struct afs_callback *, struct afs_volsync *);
1377 extern int yfs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *,
1378 struct afs_fid *, struct afs_file_status *,
1379 struct afs_callback *, unsigned int,
1380 struct afs_volsync *);
1383 struct afs_acl *acl; /* Dir/file/symlink ACL */
1384 struct afs_acl *vol_acl; /* Whole volume ACL */
1385 u32 inherit_flag; /* True if ACL is inherited from parent dir */
1386 u32 num_cleaned; /* Number of ACEs removed due to subject removal */
1388 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */
1389 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */
1392 extern void yfs_free_opaque_acl(struct yfs_acl *);
1393 extern struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *, struct yfs_acl *);
1394 extern int yfs_fs_store_opaque_acl2(struct afs_fs_cursor *, const struct afs_acl *);
1397 * Miscellaneous inline functions.
1399 static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
1401 return container_of(inode, struct afs_vnode, vfs_inode);
1404 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
1406 return &vnode->vfs_inode;
1409 static inline void afs_vnode_commit_status(struct afs_fs_cursor *fc,
1410 struct afs_vnode *vnode,
1411 unsigned int cb_break)
1413 if (fc->ac.error == 0)
1414 afs_cache_permit(vnode, fc->key, cb_break);
1417 static inline void afs_check_for_remote_deletion(struct afs_fs_cursor *fc,
1418 struct afs_vnode *vnode)
1420 if (fc->ac.error == -ENOENT) {
1421 set_bit(AFS_VNODE_DELETED, &vnode->flags);
1422 afs_break_callback(vnode);
1426 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where)
1428 trace_afs_io_error(call->debug_id, -EIO, where);
1432 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where)
1434 trace_afs_file_error(vnode, -EIO, where);
1438 /*****************************************************************************/
1442 extern unsigned afs_debug;
1444 #define dbgprintk(FMT,...) \
1445 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1447 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1448 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1449 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1452 #if defined(__KDEBUG)
1453 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1454 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1455 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1457 #elif defined(CONFIG_AFS_DEBUG)
1458 #define AFS_DEBUG_KENTER 0x01
1459 #define AFS_DEBUG_KLEAVE 0x02
1460 #define AFS_DEBUG_KDEBUG 0x04
1462 #define _enter(FMT,...) \
1464 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
1465 kenter(FMT,##__VA_ARGS__); \
1468 #define _leave(FMT,...) \
1470 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
1471 kleave(FMT,##__VA_ARGS__); \
1474 #define _debug(FMT,...) \
1476 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
1477 kdebug(FMT,##__VA_ARGS__); \
1481 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1482 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1483 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1487 * debug assertion checking
1489 #if 1 // defined(__KDEBUGALL)
1493 if (unlikely(!(X))) { \
1494 printk(KERN_ERR "\n"); \
1495 printk(KERN_ERR "AFS: Assertion failed\n"); \
1500 #define ASSERTCMP(X, OP, Y) \
1502 if (unlikely(!((X) OP (Y)))) { \
1503 printk(KERN_ERR "\n"); \
1504 printk(KERN_ERR "AFS: Assertion failed\n"); \
1505 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1506 (unsigned long)(X), (unsigned long)(Y)); \
1507 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1508 (unsigned long)(X), (unsigned long)(Y)); \
1513 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1515 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \
1516 printk(KERN_ERR "\n"); \
1517 printk(KERN_ERR "AFS: Assertion failed\n"); \
1518 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \
1519 (unsigned long)(L), (unsigned long)(N), \
1520 (unsigned long)(H)); \
1521 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
1522 (unsigned long)(L), (unsigned long)(N), \
1523 (unsigned long)(H)); \
1528 #define ASSERTIF(C, X) \
1530 if (unlikely((C) && !(X))) { \
1531 printk(KERN_ERR "\n"); \
1532 printk(KERN_ERR "AFS: Assertion failed\n"); \
1537 #define ASSERTIFCMP(C, X, OP, Y) \
1539 if (unlikely((C) && !((X) OP (Y)))) { \
1540 printk(KERN_ERR "\n"); \
1541 printk(KERN_ERR "AFS: Assertion failed\n"); \
1542 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1543 (unsigned long)(X), (unsigned long)(Y)); \
1544 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1545 (unsigned long)(X), (unsigned long)(Y)); \
1556 #define ASSERTCMP(X, OP, Y) \
1560 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1564 #define ASSERTIF(C, X) \
1568 #define ASSERTIFCMP(C, X, OP, Y) \
1572 #endif /* __KDEBUGALL */