3 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
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 */
69 unsigned int cb_v_break; /* Pre-fetch volume break count */
70 unsigned int cb_s_break; /* Pre-fetch server break count */
74 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */
75 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */
76 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */
77 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */
78 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */
79 AFS_CALL_SV_REPLYING, /* Server: Replying */
80 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */
81 AFS_CALL_COMPLETE, /* Completed or failed */
85 * List of server addresses.
87 struct afs_addr_list {
88 struct rcu_head rcu; /* Must be first */
90 u32 version; /* Version */
91 unsigned char max_addrs;
92 unsigned char nr_addrs;
93 unsigned char preferred; /* Preferred address */
94 unsigned char nr_ipv4; /* Number of IPv4 addresses */
95 enum dns_record_source source:8;
96 enum dns_lookup_status status:8;
97 unsigned long probed; /* Mask of servers that have been probed */
98 unsigned long failed; /* Mask of addrs that failed locally/ICMP */
99 unsigned long responded; /* Mask of addrs that responded */
100 struct sockaddr_rxrpc addrs[];
101 #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8))
105 * a record of an in-progress RxRPC call
108 const struct afs_call_type *type; /* type of call */
109 struct afs_addr_list *alist; /* Address is alist[addr_ix] */
110 wait_queue_head_t waitq; /* processes awaiting completion */
111 struct work_struct async_work; /* async I/O processor */
112 struct work_struct work; /* actual work processor */
113 struct rxrpc_call *rxcall; /* RxRPC call handle */
114 struct key *key; /* security for this call */
115 struct afs_net *net; /* The network namespace */
117 struct afs_server *server;
118 struct afs_vlserver *vlserver;
120 struct afs_cb_interest *cbi; /* Callback interest for server used */
121 struct afs_vnode *lvnode; /* vnode being locked */
122 void *request; /* request data (first part) */
123 struct address_space *mapping; /* Pages being written from */
124 struct iov_iter iter; /* Buffer iterator */
125 struct iov_iter *_iter; /* Iterator currently in use */
126 union { /* Convenience for ->iter */
128 struct bio_vec bvec[1];
130 void *buffer; /* reply receive buffer */
132 long ret0; /* Value to reply with instead of 0 */
133 struct afs_addr_list *ret_alist;
134 struct afs_vldb_entry *ret_vldb;
135 struct afs_acl *ret_acl;
137 struct afs_fid *out_fid;
138 struct afs_status_cb *out_dir_scb;
139 struct afs_status_cb *out_scb;
140 struct yfs_acl *out_yacl;
141 struct afs_volsync *out_volsync;
142 struct afs_volume_status *out_volstatus;
143 struct afs_read *read_request;
144 unsigned int server_index;
145 pgoff_t first; /* first page in mapping to deal with */
146 pgoff_t last; /* last page in mapping to deal with */
148 enum afs_call_state state;
149 spinlock_t state_lock;
150 int error; /* error code */
151 u32 abort_code; /* Remote abort ID or 0 */
153 unsigned int max_lifespan; /* Maximum lifespan to set if not 0 */
154 unsigned request_size; /* size of request data */
155 unsigned reply_max; /* maximum size of reply */
156 unsigned first_offset; /* offset into mapping[first] */
158 unsigned last_to; /* amount of mapping[last] */
159 unsigned count2; /* count used in unmarshalling */
161 unsigned char unmarshall; /* unmarshalling phase */
162 unsigned char addr_ix; /* Address in ->alist */
163 bool incoming; /* T if incoming call */
164 bool send_pages; /* T if data from mapping should be sent */
165 bool need_attention; /* T if RxRPC poked us */
166 bool async; /* T if asynchronous */
167 bool upgrade; /* T to request service upgrade */
168 bool have_reply_time; /* T if have got reply_time */
169 bool intr; /* T if interruptible */
170 u16 service_id; /* Actual service ID (after upgrade) */
171 unsigned int debug_id; /* Trace ID */
172 u32 operation_ID; /* operation ID for an incoming call */
173 u32 count; /* count for use in unmarshalling */
174 union { /* place to extract temporary data */
178 } __attribute__((packed));
181 ktime_t reply_time; /* Time of first reply packet */
184 struct afs_call_type {
186 unsigned int op; /* Really enum afs_fs_operation */
188 /* deliver request or reply data to an call
189 * - returning an error will cause the call to be aborted
191 int (*deliver)(struct afs_call *call);
193 /* clean up a call */
194 void (*destructor)(struct afs_call *call);
197 void (*work)(struct work_struct *work);
199 /* Call done function (gets called immediately on success or failure) */
200 void (*done)(struct afs_call *call);
204 * Key available for writeback on a file.
209 struct list_head vnode_link; /* Link in vnode->wb_keys */
213 * AFS open file information record. Pointed to by file->private_data.
216 struct key *key; /* The key this file was opened with */
217 struct afs_wb_key *wb; /* Writeback key record for this file */
220 static inline struct key *afs_file_key(struct file *file)
222 struct afs_file *af = file->private_data;
228 * Record of an outstanding read operation on a vnode.
231 loff_t pos; /* Where to start reading */
232 loff_t len; /* How much we're asking for */
233 loff_t actual_len; /* How much we're actually getting */
234 loff_t remain; /* Amount remaining */
235 loff_t file_size; /* File size returned by server */
236 afs_dataversion_t data_version; /* Version number returned by server */
238 unsigned int index; /* Which page we're reading into */
239 unsigned int nr_pages;
240 unsigned int offset; /* offset into current page */
241 struct afs_vnode *vnode;
242 void (*page_done)(struct afs_read *);
244 struct page *array[];
248 * AFS superblock private data
249 * - there's one superblock per volume
251 struct afs_super_info {
252 struct net *net_ns; /* Network namespace */
253 struct afs_cell *cell; /* The cell in which the volume resides */
254 struct afs_volume *volume; /* volume record */
255 enum afs_flock_mode flock_mode:8; /* File locking emulation mode */
256 bool dyn_root; /* True if dynamic root */
259 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
261 return sb->s_fs_info;
264 extern struct file_system_type afs_fs_type;
267 * Set of substitutes for @sys.
269 struct afs_sysnames {
270 #define AFS_NR_SYSNAME 16
271 char *subs[AFS_NR_SYSNAME];
278 * AFS network namespace record.
281 struct net *net; /* Backpointer to the owning net namespace */
282 struct afs_uuid uuid;
283 bool live; /* F if this namespace is being removed */
285 /* AF_RXRPC I/O stuff */
286 struct socket *socket;
287 struct afs_call *spare_incoming_call;
288 struct work_struct charge_preallocation_work;
289 struct mutex socket_mutex;
290 atomic_t nr_outstanding_calls;
291 atomic_t nr_superblocks;
294 struct rb_root cells;
295 struct afs_cell __rcu *ws_cell;
296 struct work_struct cells_manager;
297 struct timer_list cells_timer;
298 atomic_t cells_outstanding;
299 seqlock_t cells_lock;
301 struct mutex proc_cells_lock;
302 struct hlist_head proc_cells;
304 /* Known servers. Theoretically each fileserver can only be in one
305 * cell, but in practice, people create aliases and subsets and there's
306 * no easy way to distinguish them.
308 seqlock_t fs_lock; /* For fs_servers */
309 struct rb_root fs_servers; /* afs_server (by server UUID or address) */
310 struct list_head fs_updates; /* afs_server (by update_at) */
311 struct hlist_head fs_proc; /* procfs servers list */
313 struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */
314 struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */
315 seqlock_t fs_addr_lock; /* For fs_addresses[46] */
317 struct work_struct fs_manager;
318 struct timer_list fs_timer;
319 atomic_t servers_outstanding;
321 /* File locking renewal management */
322 struct mutex lock_manager_mutex;
325 struct super_block *dynroot_sb; /* Dynamic root mount superblock */
326 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */
327 struct afs_sysnames *sysnames;
328 rwlock_t sysnames_lock;
330 /* Statistics counters */
331 atomic_t n_lookup; /* Number of lookups done */
332 atomic_t n_reval; /* Number of dentries needing revalidation */
333 atomic_t n_inval; /* Number of invalidations by the server */
334 atomic_t n_relpg; /* Number of invalidations by releasepage */
335 atomic_t n_read_dir; /* Number of directory pages read */
336 atomic_t n_dir_cr; /* Number of directory entry creation edits */
337 atomic_t n_dir_rm; /* Number of directory entry removal edits */
338 atomic_t n_stores; /* Number of store ops */
339 atomic_long_t n_store_bytes; /* Number of bytes stored */
340 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */
341 atomic_t n_fetches; /* Number of data fetch ops */
344 extern const char afs_init_sysname[];
346 enum afs_cell_state {
350 AFS_CELL_DEACTIVATING,
358 * This is a tricky concept to get right as it is possible to create aliases
359 * simply by pointing AFSDB/SRV records for two names at the same set of VL
360 * servers; it is also possible to do things like setting up two sets of VL
361 * servers, one of which provides a superset of the volumes provided by the
362 * other (for internal/external division, for example).
364 * Cells only exist in the sense that (a) a cell's name maps to a set of VL
365 * servers and (b) a cell's name is used by the client to select the key to use
366 * for authentication and encryption. The cell name is not typically used in
369 * There is no easy way to determine if two cells are aliases or one is a
375 struct rb_node net_node; /* Node in net->cells */
378 struct key *anonymous_key; /* anonymous user key for this cell */
379 struct work_struct manager; /* Manager for init/deinit/dns */
380 struct hlist_node proc_link; /* /proc cell list link */
381 #ifdef CONFIG_AFS_FSCACHE
382 struct fscache_cookie *cache; /* caching cookie */
384 time64_t dns_expiry; /* Time AFSDB/SRV record expires */
385 time64_t last_inactive; /* Time of last drop of usage count */
388 #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */
389 #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */
390 enum afs_cell_state state;
392 enum dns_record_source dns_source:8; /* Latest source of data from lookup */
393 enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */
394 unsigned int dns_lookup_count; /* Counter of DNS lookups */
396 /* Active fileserver interaction state. */
397 struct list_head proc_volumes; /* procfs volume list */
400 /* VL server list. */
401 rwlock_t vl_servers_lock; /* Lock on vl_servers */
402 struct afs_vlserver_list __rcu *vl_servers;
404 u8 name_len; /* Length of name */
405 char name[64 + 1]; /* Cell name, case-flattened and NUL-padded */
409 * Volume Location server record.
411 struct afs_vlserver {
413 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */
415 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */
416 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */
417 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */
418 rwlock_t lock; /* Lock on addresses */
422 wait_queue_head_t probe_wq;
423 atomic_t probe_outstanding;
424 spinlock_t probe_lock;
426 unsigned int rtt; /* RTT as ktime/64 */
433 bool local_failure:1;
437 u16 name_len; /* Length of name */
438 char name[]; /* Server name, case-flattened */
442 * Weighted list of Volume Location servers.
444 struct afs_vlserver_entry {
445 u16 priority; /* Preference (as SRV) */
446 u16 weight; /* Weight (as SRV) */
447 enum dns_record_source source:8;
448 enum dns_lookup_status status:8;
449 struct afs_vlserver *server;
452 struct afs_vlserver_list {
456 u8 index; /* Server currently in use */
457 u8 preferred; /* Preferred server */
458 enum dns_record_source source:8;
459 enum dns_lookup_status status:8;
461 struct afs_vlserver_entry servers[];
467 * This is pointed to by cell->vldb_entries, indexed by name.
469 struct afs_vldb_entry {
470 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */
473 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */
474 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */
475 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */
476 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */
477 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */
479 uuid_t fs_server[AFS_NMAXNSERVERS];
480 u8 fs_mask[AFS_NMAXNSERVERS];
481 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */
482 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */
483 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */
485 u8 nr_servers; /* Number of server records */
487 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
491 * Record of fileserver with which we're actively communicating.
496 uuid_t uuid; /* Server ID */
497 struct afs_uuid _uuid;
500 struct afs_addr_list __rcu *addresses;
501 struct rb_node uuid_rb; /* Link in net->servers */
502 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */
503 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */
504 struct hlist_node proc_link; /* Link in net->fs_proc */
505 struct afs_server *gc_next; /* Next server in manager's list */
506 time64_t put_time; /* Time at which last put */
507 time64_t update_at; /* Time at which to next update the record */
509 #define AFS_SERVER_FL_NOT_READY 1 /* The record is not ready for use */
510 #define AFS_SERVER_FL_NOT_FOUND 2 /* VL server says no such server */
511 #define AFS_SERVER_FL_VL_FAIL 3 /* Failed to access VL server */
512 #define AFS_SERVER_FL_UPDATING 4
513 #define AFS_SERVER_FL_PROBED 5 /* The fileserver has been probed */
514 #define AFS_SERVER_FL_PROBING 6 /* Fileserver is being probed */
515 #define AFS_SERVER_FL_NO_IBULK 7 /* Fileserver doesn't support FS.InlineBulkStatus */
516 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */
517 #define AFS_SERVER_FL_IS_YFS 9 /* Server is YFS not AFS */
518 #define AFS_SERVER_FL_NO_RM2 10 /* Fileserver doesn't support YFS.RemoveFile2 */
519 #define AFS_SERVER_FL_HAVE_EPOCH 11 /* ->epoch is valid */
521 u32 addr_version; /* Address list version */
522 u32 cm_epoch; /* Server RxRPC epoch */
524 /* file service access */
525 rwlock_t fs_lock; /* access lock */
527 /* callback promise management */
528 struct hlist_head cb_volumes; /* List of volume interests on this server */
529 unsigned cb_s_break; /* Break-everything counter. */
530 rwlock_t cb_break_lock; /* Volume finding lock */
533 wait_queue_head_t probe_wq;
534 atomic_t probe_outstanding;
535 spinlock_t probe_lock;
537 unsigned int rtt; /* RTT as ktime/64 */
545 bool local_failure:1;
548 bool said_rebooted:1;
549 bool said_inconsistent:1;
554 * Volume collation in the server's callback interest list.
556 struct afs_vol_interest {
557 struct hlist_node srv_link; /* Link in server->cb_volumes */
558 struct hlist_head cb_interests; /* List of callback interests on the server */
561 afs_volid_t vid; /* Volume ID to match */
567 * Interest by a superblock on a server.
569 struct afs_cb_interest {
570 struct hlist_node cb_vlink; /* Link in vol_interest->cb_interests */
571 struct afs_vol_interest *vol_interest;
572 struct afs_server *server; /* Server on which this interest resides */
573 struct super_block *sb; /* Superblock on which inodes reside */
576 afs_volid_t vid; /* Volume ID to match */
582 * Replaceable server list.
584 struct afs_server_entry {
585 struct afs_server *server;
586 struct afs_cb_interest *cb_interest;
589 struct afs_server_list {
591 unsigned char nr_servers;
592 unsigned char preferred; /* Preferred server */
593 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */
594 unsigned int seq; /* Set to ->servers_seq when installed */
596 struct afs_server_entry servers[];
600 * Live AFS volume management.
603 afs_volid_t vid; /* volume ID */
605 time64_t update_at; /* Time at which to next update */
606 struct afs_cell *cell; /* Cell to which belongs (pins ref) */
607 struct list_head proc_link; /* Link in cell->vl_proc */
609 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */
610 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */
611 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */
612 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */
613 #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */
614 #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */
615 #ifdef CONFIG_AFS_FSCACHE
616 struct fscache_cookie *cache; /* caching cookie */
618 struct afs_server_list *servers; /* List of servers on which volume resides */
619 rwlock_t servers_lock; /* Lock for ->servers */
620 unsigned int servers_seq; /* Incremented each time ->servers changes */
622 unsigned cb_v_break; /* Break-everything counter. */
623 rwlock_t cb_break_lock;
625 afs_voltype_t type; /* type of volume */
627 char type_force; /* force volume type (suppress R/O -> R/W) */
629 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
632 enum afs_lock_state {
633 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */
634 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */
635 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */
636 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */
637 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */
638 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */
639 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */
640 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */
644 * AFS inode private data.
646 * Note that afs_alloc_inode() *must* reset anything that could incorrectly
647 * leak from one inode to another.
650 struct inode vfs_inode; /* the VFS's inode record */
652 struct afs_volume *volume; /* volume on which vnode resides */
653 struct afs_fid fid; /* the file identifier for this inode */
654 struct afs_file_status status; /* AFS status info for this file */
655 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */
656 #ifdef CONFIG_AFS_FSCACHE
657 struct fscache_cookie *cache; /* caching cookie */
659 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */
660 struct mutex io_lock; /* Lock for serialising I/O on this mutex */
661 struct rw_semaphore validate_lock; /* lock for validating this vnode */
662 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */
663 struct key *silly_key; /* Silly rename key */
664 spinlock_t wb_lock; /* lock for wb_keys */
665 spinlock_t lock; /* waitqueue/flags lock */
667 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */
668 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */
669 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */
670 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */
671 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */
672 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */
673 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */
674 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */
675 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */
677 struct list_head wb_keys; /* List of keys available for writeback */
678 struct list_head pending_locks; /* locks waiting to be granted */
679 struct list_head granted_locks; /* locks granted on this file */
680 struct delayed_work lock_work; /* work to be done in locking */
681 struct key *lock_key; /* Key to be used in lock ops */
682 ktime_t locked_at; /* Time at which lock obtained */
683 enum afs_lock_state lock_state : 8;
684 afs_lock_type_t lock_type : 8;
686 /* outstanding callback notification on this file */
687 struct afs_cb_interest __rcu *cb_interest; /* Server on which this resides */
688 unsigned int cb_s_break; /* Mass break counter on ->server */
689 unsigned int cb_v_break; /* Mass break counter on ->volume */
690 unsigned int cb_break; /* Break counter on vnode */
691 seqlock_t cb_lock; /* Lock for ->cb_interest, ->status, ->cb_*break */
693 time64_t cb_expires_at; /* time at which callback expires */
696 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode)
698 #ifdef CONFIG_AFS_FSCACHE
706 * cached security record for one user's attempt to access a vnode
709 struct key *key; /* RxRPC ticket holding a security context */
710 afs_access_t access; /* CallerAccess value for this key */
714 * Immutable cache of CallerAccess records from attempts to access vnodes.
715 * These may be shared between multiple vnodes.
719 struct hlist_node hash_node; /* Link in hash */
720 unsigned long h; /* Hash value for this permit list */
722 unsigned short nr_permits; /* Number of records */
723 bool invalidated; /* Invalidated due to key change */
724 struct afs_permit permits[]; /* List of permits sorted by key pointer */
728 * record of one of a system's set of network interfaces
730 struct afs_interface {
731 struct in_addr address; /* IPv4 address bound to interface */
732 struct in_addr netmask; /* netmask applied to address */
733 unsigned mtu; /* MTU of interface */
737 * Error prioritisation and accumulation.
740 short error; /* Accumulated error */
741 bool responded; /* T if server responded */
745 * Cursor for iterating over a server's address list.
747 struct afs_addr_cursor {
748 struct afs_addr_list *alist; /* Current address list (pins ref) */
749 unsigned long tried; /* Tried addresses */
750 signed char index; /* Current address */
751 bool responded; /* T if the current address responded */
752 unsigned short nr_iterations; /* Number of address iterations */
758 * Cursor for iterating over a set of volume location servers.
760 struct afs_vl_cursor {
761 struct afs_addr_cursor ac;
762 struct afs_cell *cell; /* The cell we're querying */
763 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */
764 struct afs_vlserver *server; /* Server on which this resides */
765 struct key *key; /* Key for the server */
766 unsigned long untried; /* Bitmask of untried servers */
767 short index; /* Current server */
769 unsigned short flags;
770 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */
771 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */
772 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */
773 unsigned short nr_iterations; /* Number of server iterations */
777 * Cursor for iterating over a set of fileservers.
779 struct afs_fs_cursor {
780 const struct afs_call_type *type; /* Type of call done */
781 struct afs_addr_cursor ac;
782 struct afs_vnode *vnode;
783 struct afs_server_list *server_list; /* Current server list (pins ref) */
784 struct afs_cb_interest *cbi; /* Server on which this resides (pins ref) */
785 struct key *key; /* Key for the server */
786 unsigned long untried; /* Bitmask of untried servers */
787 unsigned int cb_break; /* cb_break + cb_s_break before the call */
788 unsigned int cb_break_2; /* cb_break + cb_s_break (2nd vnode) */
789 short index; /* Current server */
791 unsigned short flags;
792 #define AFS_FS_CURSOR_STOP 0x0001 /* Set to cease iteration */
793 #define AFS_FS_CURSOR_VBUSY 0x0002 /* Set if seen VBUSY */
794 #define AFS_FS_CURSOR_VMOVED 0x0004 /* Set if seen VMOVED */
795 #define AFS_FS_CURSOR_VNOVOL 0x0008 /* Set if seen VNOVOL */
796 #define AFS_FS_CURSOR_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */
797 #define AFS_FS_CURSOR_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */
798 #define AFS_FS_CURSOR_INTR 0x0040 /* Set if op is interruptible */
799 unsigned short nr_iterations; /* Number of server iterations */
803 * Cache auxiliary data.
805 struct afs_vnode_cache_aux {
809 #include <trace/events/afs.h>
811 /*****************************************************************************/
815 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist)
818 refcount_inc(&alist->usage);
821 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int,
824 extern void afs_put_addrlist(struct afs_addr_list *);
825 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *,
826 const char *, size_t, char,
827 unsigned short, unsigned short);
828 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *);
829 extern bool afs_iterate_addresses(struct afs_addr_cursor *);
830 extern int afs_end_cursor(struct afs_addr_cursor *);
832 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16);
833 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16);
838 #ifdef CONFIG_AFS_FSCACHE
839 extern struct fscache_netfs afs_cache_netfs;
840 extern struct fscache_cookie_def afs_cell_cache_index_def;
841 extern struct fscache_cookie_def afs_volume_cache_index_def;
842 extern struct fscache_cookie_def afs_vnode_cache_index_def;
844 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL)
845 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL)
846 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL)
852 extern void afs_init_callback_state(struct afs_server *);
853 extern void __afs_break_callback(struct afs_vnode *);
854 extern void afs_break_callback(struct afs_vnode *);
855 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break*);
857 extern int afs_register_server_cb_interest(struct afs_vnode *,
858 struct afs_server_list *, unsigned int);
859 extern void afs_put_cb_interest(struct afs_net *, struct afs_cb_interest *);
860 extern void afs_clear_callback_interests(struct afs_net *, struct afs_server_list *);
862 static inline struct afs_cb_interest *afs_get_cb_interest(struct afs_cb_interest *cbi)
865 refcount_inc(&cbi->usage);
869 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode)
871 return vnode->cb_break + vnode->cb_v_break;
874 static inline bool afs_cb_is_broken(unsigned int cb_break,
875 const struct afs_vnode *vnode,
876 const struct afs_cb_interest *cbi)
878 return !cbi || cb_break != (vnode->cb_break +
879 vnode->volume->cb_v_break);
885 extern int afs_cell_init(struct afs_net *, const char *);
886 extern struct afs_cell *afs_lookup_cell_rcu(struct afs_net *, const char *, unsigned);
887 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned,
889 extern struct afs_cell *afs_get_cell(struct afs_cell *);
890 extern void afs_put_cell(struct afs_net *, struct afs_cell *);
891 extern void afs_manage_cells(struct work_struct *);
892 extern void afs_cells_timer(struct timer_list *);
893 extern void __net_exit afs_cell_purge(struct afs_net *);
898 extern bool afs_cm_incoming_call(struct afs_call *);
903 extern const struct file_operations afs_dir_file_operations;
904 extern const struct inode_operations afs_dir_inode_operations;
905 extern const struct address_space_operations afs_dir_aops;
906 extern const struct dentry_operations afs_fs_dentry_operations;
908 extern void afs_d_release(struct dentry *);
913 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *,
914 enum afs_edit_dir_reason);
915 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason);
920 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *,
921 struct dentry *, struct key *);
922 extern int afs_silly_iput(struct dentry *, struct inode *);
927 extern const struct file_operations afs_dynroot_file_operations;
928 extern const struct inode_operations afs_dynroot_inode_operations;
929 extern const struct dentry_operations afs_dynroot_dentry_operations;
931 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *);
932 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *);
933 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *);
934 extern int afs_dynroot_populate(struct super_block *);
935 extern void afs_dynroot_depopulate(struct super_block *);
940 extern const struct address_space_operations afs_fs_aops;
941 extern const struct inode_operations afs_file_inode_operations;
942 extern const struct file_operations afs_file_operations;
944 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *);
945 extern void afs_put_wb_key(struct afs_wb_key *);
946 extern int afs_open(struct inode *, struct file *);
947 extern int afs_release(struct inode *, struct file *);
948 extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *);
949 extern int afs_page_filler(void *, struct page *);
950 extern void afs_put_read(struct afs_read *);
955 extern struct workqueue_struct *afs_lock_manager;
957 extern void afs_lock_op_done(struct afs_call *);
958 extern void afs_lock_work(struct work_struct *);
959 extern void afs_lock_may_be_available(struct afs_vnode *);
960 extern int afs_lock(struct file *, int, struct file_lock *);
961 extern int afs_flock(struct file *, int, struct file_lock *);
966 extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_status_cb *,
967 struct afs_volsync *);
968 extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *);
969 extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_status_cb *, struct afs_read *);
970 extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t,
971 struct afs_status_cb *, struct afs_fid *, struct afs_status_cb *);
972 extern int afs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool,
973 struct afs_status_cb *);
974 extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *,
975 struct afs_status_cb *, struct afs_status_cb *);
976 extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *,
977 struct afs_status_cb *, struct afs_fid *, struct afs_status_cb *);
978 extern int afs_fs_rename(struct afs_fs_cursor *, const char *,
979 struct afs_vnode *, const char *,
980 struct afs_status_cb *, struct afs_status_cb *);
981 extern int afs_fs_store_data(struct afs_fs_cursor *, struct address_space *,
982 pgoff_t, pgoff_t, unsigned, unsigned, struct afs_status_cb *);
983 extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *, struct afs_status_cb *);
984 extern int afs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *);
985 extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t, struct afs_status_cb *);
986 extern int afs_fs_extend_lock(struct afs_fs_cursor *, struct afs_status_cb *);
987 extern int afs_fs_release_lock(struct afs_fs_cursor *, struct afs_status_cb *);
988 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *,
989 struct afs_addr_cursor *, struct key *);
990 extern struct afs_call *afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
991 struct afs_addr_cursor *, struct key *,
993 extern int afs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *,
994 struct afs_fid *, struct afs_status_cb *,
995 unsigned int, struct afs_volsync *);
996 extern int afs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *,
997 struct afs_fid *, struct afs_status_cb *,
998 struct afs_volsync *);
1005 extern struct afs_acl *afs_fs_fetch_acl(struct afs_fs_cursor *, struct afs_status_cb *);
1006 extern int afs_fs_store_acl(struct afs_fs_cursor *, const struct afs_acl *,
1007 struct afs_status_cb *);
1012 extern void afs_fileserver_probe_result(struct afs_call *);
1013 extern int afs_probe_fileservers(struct afs_net *, struct key *, struct afs_server_list *);
1014 extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long);
1019 extern void afs_vnode_commit_status(struct afs_fs_cursor *,
1022 const afs_dataversion_t *,
1023 struct afs_status_cb *);
1024 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *);
1025 extern int afs_iget5_test(struct inode *, void *);
1026 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool);
1027 extern struct inode *afs_iget(struct super_block *, struct key *,
1028 struct afs_iget_data *, struct afs_status_cb *,
1029 struct afs_cb_interest *,
1030 struct afs_vnode *);
1031 extern void afs_zap_data(struct afs_vnode *);
1032 extern bool afs_check_validity(struct afs_vnode *);
1033 extern int afs_validate(struct afs_vnode *, struct key *);
1034 extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int);
1035 extern int afs_setattr(struct dentry *, struct iattr *);
1036 extern void afs_evict_inode(struct inode *);
1037 extern int afs_drop_inode(struct inode *);
1042 extern struct workqueue_struct *afs_wq;
1043 extern int afs_net_id;
1045 static inline struct afs_net *afs_net(struct net *net)
1047 return net_generic(net, afs_net_id);
1050 static inline struct afs_net *afs_sb2net(struct super_block *sb)
1052 return afs_net(AFS_FS_S(sb)->net_ns);
1055 static inline struct afs_net *afs_d2net(struct dentry *dentry)
1057 return afs_sb2net(dentry->d_sb);
1060 static inline struct afs_net *afs_i2net(struct inode *inode)
1062 return afs_sb2net(inode->i_sb);
1065 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
1067 return afs_i2net(&vnode->vfs_inode);
1070 static inline struct afs_net *afs_sock2net(struct sock *sk)
1072 return net_generic(sock_net(sk), afs_net_id);
1075 static inline void __afs_stat(atomic_t *s)
1080 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n)
1085 extern int afs_abort_to_error(u32);
1086 extern void afs_prioritise_error(struct afs_error *, int, u32);
1091 extern const struct inode_operations afs_mntpt_inode_operations;
1092 extern const struct inode_operations afs_autocell_inode_operations;
1093 extern const struct file_operations afs_mntpt_file_operations;
1095 extern struct vfsmount *afs_d_automount(struct path *);
1096 extern void afs_mntpt_kill_timer(void);
1101 extern int afs_get_ipv4_interfaces(struct afs_net *, struct afs_interface *,
1107 #ifdef CONFIG_PROC_FS
1108 extern int __net_init afs_proc_init(struct afs_net *);
1109 extern void __net_exit afs_proc_cleanup(struct afs_net *);
1110 extern int afs_proc_cell_setup(struct afs_cell *);
1111 extern void afs_proc_cell_remove(struct afs_cell *);
1112 extern void afs_put_sysnames(struct afs_sysnames *);
1114 static inline int afs_proc_init(struct afs_net *net) { return 0; }
1115 static inline void afs_proc_cleanup(struct afs_net *net) {}
1116 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; }
1117 static inline void afs_proc_cell_remove(struct afs_cell *cell) {}
1118 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {}
1124 extern bool afs_begin_vnode_operation(struct afs_fs_cursor *, struct afs_vnode *,
1125 struct key *, bool);
1126 extern bool afs_select_fileserver(struct afs_fs_cursor *);
1127 extern bool afs_select_current_fileserver(struct afs_fs_cursor *);
1128 extern int afs_end_vnode_operation(struct afs_fs_cursor *);
1133 extern struct workqueue_struct *afs_async_calls;
1135 extern int __net_init afs_open_socket(struct afs_net *);
1136 extern void __net_exit afs_close_socket(struct afs_net *);
1137 extern void afs_charge_preallocation(struct work_struct *);
1138 extern void afs_put_call(struct afs_call *);
1139 extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t);
1140 extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *);
1141 extern struct afs_call *afs_alloc_flat_call(struct afs_net *,
1142 const struct afs_call_type *,
1144 extern void afs_flat_call_destructor(struct afs_call *);
1145 extern void afs_send_empty_reply(struct afs_call *);
1146 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
1147 extern int afs_extract_data(struct afs_call *, bool);
1148 extern int afs_protocol_error(struct afs_call *, int, enum afs_eproto_cause);
1150 static inline void afs_set_fc_call(struct afs_call *call, struct afs_fs_cursor *fc)
1152 call->intr = fc->flags & AFS_FS_CURSOR_INTR;
1153 fc->type = call->type;
1156 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size)
1158 call->kvec[0].iov_base = buf;
1159 call->kvec[0].iov_len = size;
1160 iov_iter_kvec(&call->iter, READ, call->kvec, 1, size);
1163 static inline void afs_extract_to_tmp(struct afs_call *call)
1165 afs_extract_begin(call, &call->tmp, sizeof(call->tmp));
1168 static inline void afs_extract_to_tmp64(struct afs_call *call)
1170 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64));
1173 static inline void afs_extract_discard(struct afs_call *call, size_t size)
1175 iov_iter_discard(&call->iter, READ, size);
1178 static inline void afs_extract_to_buf(struct afs_call *call, size_t size)
1180 afs_extract_begin(call, call->buffer, size);
1183 static inline int afs_transfer_reply(struct afs_call *call)
1185 return afs_extract_data(call, false);
1188 static inline bool afs_check_call_state(struct afs_call *call,
1189 enum afs_call_state state)
1191 return READ_ONCE(call->state) == state;
1194 static inline bool afs_set_call_state(struct afs_call *call,
1195 enum afs_call_state from,
1196 enum afs_call_state to)
1200 spin_lock_bh(&call->state_lock);
1201 if (call->state == from) {
1203 trace_afs_call_state(call, from, to, 0, 0);
1206 spin_unlock_bh(&call->state_lock);
1210 static inline void afs_set_call_complete(struct afs_call *call,
1211 int error, u32 remote_abort)
1213 enum afs_call_state state;
1216 spin_lock_bh(&call->state_lock);
1217 state = call->state;
1218 if (state != AFS_CALL_COMPLETE) {
1219 call->abort_code = remote_abort;
1220 call->error = error;
1221 call->state = AFS_CALL_COMPLETE;
1222 trace_afs_call_state(call, state, AFS_CALL_COMPLETE,
1223 error, remote_abort);
1226 spin_unlock_bh(&call->state_lock);
1228 trace_afs_call_done(call);
1234 extern void afs_put_permits(struct afs_permits *);
1235 extern void afs_clear_permits(struct afs_vnode *);
1236 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int,
1237 struct afs_status_cb *);
1238 extern void afs_zap_permits(struct rcu_head *);
1239 extern struct key *afs_request_key(struct afs_cell *);
1240 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *);
1241 extern int afs_permission(struct inode *, int);
1242 extern void __exit afs_clean_up_permit_cache(void);
1247 extern spinlock_t afs_server_peer_lock;
1249 static inline struct afs_server *afs_get_server(struct afs_server *server)
1251 atomic_inc(&server->usage);
1255 extern struct afs_server *afs_find_server(struct afs_net *,
1256 const struct sockaddr_rxrpc *);
1257 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *);
1258 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *);
1259 extern void afs_put_server(struct afs_net *, struct afs_server *);
1260 extern void afs_manage_servers(struct work_struct *);
1261 extern void afs_servers_timer(struct timer_list *);
1262 extern void __net_exit afs_purge_servers(struct afs_net *);
1263 extern bool afs_check_server_record(struct afs_fs_cursor *, struct afs_server *);
1268 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist)
1270 refcount_inc(&slist->usage);
1274 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *);
1275 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *,
1276 struct afs_vldb_entry *,
1278 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *);
1283 extern int __init afs_fs_init(void);
1284 extern void afs_fs_exit(void);
1289 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *,
1291 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *);
1292 extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *,
1293 struct key *, struct afs_vlserver *, unsigned int);
1294 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *);
1299 extern void afs_vlserver_probe_result(struct afs_call *);
1300 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *);
1301 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long);
1306 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *,
1307 struct afs_cell *, struct key *);
1308 extern bool afs_select_vlserver(struct afs_vl_cursor *);
1309 extern bool afs_select_current_vlserver(struct afs_vl_cursor *);
1310 extern int afs_end_vlserver_operation(struct afs_vl_cursor *);
1315 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver)
1317 atomic_inc(&vlserver->usage);
1321 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist)
1324 atomic_inc(&vllist->usage);
1328 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short);
1329 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *);
1330 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int);
1331 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *);
1332 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *,
1333 const void *, size_t);
1338 static inline struct afs_volume *__afs_get_volume(struct afs_volume *volume)
1341 atomic_inc(&volume->usage);
1345 extern struct afs_volume *afs_create_volume(struct afs_fs_context *);
1346 extern void afs_activate_volume(struct afs_volume *);
1347 extern void afs_deactivate_volume(struct afs_volume *);
1348 extern void afs_put_volume(struct afs_cell *, struct afs_volume *);
1349 extern int afs_check_volume_status(struct afs_volume *, struct key *);
1354 extern int afs_set_page_dirty(struct page *);
1355 extern int afs_write_begin(struct file *file, struct address_space *mapping,
1356 loff_t pos, unsigned len, unsigned flags,
1357 struct page **pagep, void **fsdata);
1358 extern int afs_write_end(struct file *file, struct address_space *mapping,
1359 loff_t pos, unsigned len, unsigned copied,
1360 struct page *page, void *fsdata);
1361 extern int afs_writepage(struct page *, struct writeback_control *);
1362 extern int afs_writepages(struct address_space *, struct writeback_control *);
1363 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *);
1364 extern int afs_fsync(struct file *, loff_t, loff_t, int);
1365 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf);
1366 extern void afs_prune_wb_keys(struct afs_vnode *);
1367 extern int afs_launder_page(struct page *);
1372 extern const struct xattr_handler *afs_xattr_handlers[];
1373 extern ssize_t afs_listxattr(struct dentry *, char *, size_t);
1378 extern int yfs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_status_cb *,
1379 struct afs_volsync *);
1380 extern int yfs_fs_fetch_data(struct afs_fs_cursor *, struct afs_status_cb *, struct afs_read *);
1381 extern int yfs_fs_create_file(struct afs_fs_cursor *, const char *, umode_t, struct afs_status_cb *,
1382 struct afs_fid *, struct afs_status_cb *);
1383 extern int yfs_fs_make_dir(struct afs_fs_cursor *, const char *, umode_t, struct afs_status_cb *,
1384 struct afs_fid *, struct afs_status_cb *);
1385 extern int yfs_fs_remove_file2(struct afs_fs_cursor *, struct afs_vnode *, const char *,
1386 struct afs_status_cb *, struct afs_status_cb *);
1387 extern int yfs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool,
1388 struct afs_status_cb *);
1389 extern int yfs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *,
1390 struct afs_status_cb *, struct afs_status_cb *);
1391 extern int yfs_fs_symlink(struct afs_fs_cursor *, const char *, const char *,
1392 struct afs_status_cb *, struct afs_fid *, struct afs_status_cb *);
1393 extern int yfs_fs_rename(struct afs_fs_cursor *, const char *, struct afs_vnode *, const char *,
1394 struct afs_status_cb *, struct afs_status_cb *);
1395 extern int yfs_fs_store_data(struct afs_fs_cursor *, struct address_space *,
1396 pgoff_t, pgoff_t, unsigned, unsigned, struct afs_status_cb *);
1397 extern int yfs_fs_setattr(struct afs_fs_cursor *, struct iattr *, struct afs_status_cb *);
1398 extern int yfs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *);
1399 extern int yfs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t, struct afs_status_cb *);
1400 extern int yfs_fs_extend_lock(struct afs_fs_cursor *, struct afs_status_cb *);
1401 extern int yfs_fs_release_lock(struct afs_fs_cursor *, struct afs_status_cb *);
1402 extern int yfs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *,
1403 struct afs_fid *, struct afs_status_cb *,
1404 struct afs_volsync *);
1405 extern int yfs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *,
1406 struct afs_fid *, struct afs_status_cb *,
1407 unsigned int, struct afs_volsync *);
1410 struct afs_acl *acl; /* Dir/file/symlink ACL */
1411 struct afs_acl *vol_acl; /* Whole volume ACL */
1412 u32 inherit_flag; /* True if ACL is inherited from parent dir */
1413 u32 num_cleaned; /* Number of ACEs removed due to subject removal */
1415 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */
1416 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */
1419 extern void yfs_free_opaque_acl(struct yfs_acl *);
1420 extern struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *, struct yfs_acl *,
1421 struct afs_status_cb *);
1422 extern int yfs_fs_store_opaque_acl2(struct afs_fs_cursor *, const struct afs_acl *,
1423 struct afs_status_cb *);
1426 * Miscellaneous inline functions.
1428 static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
1430 return container_of(inode, struct afs_vnode, vfs_inode);
1433 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
1435 return &vnode->vfs_inode;
1438 static inline void afs_check_for_remote_deletion(struct afs_fs_cursor *fc,
1439 struct afs_vnode *vnode)
1441 if (fc->ac.error == -ENOENT) {
1442 set_bit(AFS_VNODE_DELETED, &vnode->flags);
1443 afs_break_callback(vnode);
1447 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where)
1449 trace_afs_io_error(call->debug_id, -EIO, where);
1453 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where)
1455 trace_afs_file_error(vnode, -EIO, where);
1459 /*****************************************************************************/
1463 extern unsigned afs_debug;
1465 #define dbgprintk(FMT,...) \
1466 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1468 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1469 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1470 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1473 #if defined(__KDEBUG)
1474 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1475 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1476 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1478 #elif defined(CONFIG_AFS_DEBUG)
1479 #define AFS_DEBUG_KENTER 0x01
1480 #define AFS_DEBUG_KLEAVE 0x02
1481 #define AFS_DEBUG_KDEBUG 0x04
1483 #define _enter(FMT,...) \
1485 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
1486 kenter(FMT,##__VA_ARGS__); \
1489 #define _leave(FMT,...) \
1491 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
1492 kleave(FMT,##__VA_ARGS__); \
1495 #define _debug(FMT,...) \
1497 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
1498 kdebug(FMT,##__VA_ARGS__); \
1502 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1503 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1504 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1508 * debug assertion checking
1510 #if 1 // defined(__KDEBUGALL)
1514 if (unlikely(!(X))) { \
1515 printk(KERN_ERR "\n"); \
1516 printk(KERN_ERR "AFS: Assertion failed\n"); \
1521 #define ASSERTCMP(X, OP, Y) \
1523 if (unlikely(!((X) OP (Y)))) { \
1524 printk(KERN_ERR "\n"); \
1525 printk(KERN_ERR "AFS: Assertion failed\n"); \
1526 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1527 (unsigned long)(X), (unsigned long)(Y)); \
1528 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1529 (unsigned long)(X), (unsigned long)(Y)); \
1534 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1536 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \
1537 printk(KERN_ERR "\n"); \
1538 printk(KERN_ERR "AFS: Assertion failed\n"); \
1539 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \
1540 (unsigned long)(L), (unsigned long)(N), \
1541 (unsigned long)(H)); \
1542 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
1543 (unsigned long)(L), (unsigned long)(N), \
1544 (unsigned long)(H)); \
1549 #define ASSERTIF(C, X) \
1551 if (unlikely((C) && !(X))) { \
1552 printk(KERN_ERR "\n"); \
1553 printk(KERN_ERR "AFS: Assertion failed\n"); \
1558 #define ASSERTIFCMP(C, X, OP, Y) \
1560 if (unlikely((C) && !((X) OP (Y)))) { \
1561 printk(KERN_ERR "\n"); \
1562 printk(KERN_ERR "AFS: Assertion failed\n"); \
1563 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1564 (unsigned long)(X), (unsigned long)(Y)); \
1565 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1566 (unsigned long)(X), (unsigned long)(Y)); \
1577 #define ASSERTCMP(X, OP, Y) \
1581 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1585 #define ASSERTIF(C, X) \
1589 #define ASSERTIFCMP(C, X, OP, Y) \
1593 #endif /* __KDEBUGALL */