1 /* SPDX-License-Identifier: GPL-2.0-or-later */
4 * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
8 #include <linux/compiler.h>
9 #include <linux/kernel.h>
10 #include <linux/ktime.h>
12 #include <linux/pagemap.h>
13 #include <linux/rxrpc.h>
14 #include <linux/key.h>
15 #include <linux/workqueue.h>
16 #include <linux/sched.h>
17 #include <linux/fscache.h>
18 #include <linux/backing-dev.h>
19 #include <linux/uuid.h>
20 #include <linux/mm_types.h>
21 #include <linux/dns_resolver.h>
22 #include <net/net_namespace.h>
23 #include <net/netns/generic.h>
25 #include <net/af_rxrpc.h>
30 #define AFS_CELL_MAX_ADDRS 15
36 * Partial file-locking emulation mode. (The problem being that AFS3 only
37 * allows whole-file locks and no upgrading/downgrading).
41 afs_flock_mode_local, /* Local locking only */
42 afs_flock_mode_openafs, /* Don't get server lock for a partial lock */
43 afs_flock_mode_strict, /* Always get a server lock for a partial lock */
44 afs_flock_mode_write, /* Get an exclusive server lock for a partial lock */
47 struct afs_fs_context {
48 bool force; /* T to force cell type */
49 bool autocell; /* T if set auto mount operation */
50 bool dyn_root; /* T if dynamic root */
51 bool no_cell; /* T if the source is "none" (for dynroot) */
52 enum afs_flock_mode flock_mode; /* Partial file-locking emulation mode */
53 afs_voltype_t type; /* type of volume requested */
54 unsigned int volnamesz; /* size of volume name */
55 const char *volname; /* name of volume to mount */
56 struct afs_net *net; /* the AFS net namespace stuff */
57 struct afs_cell *cell; /* cell in which to find volume */
58 struct afs_volume *volume; /* volume record */
59 struct key *key; /* key to use for secure mounting */
63 AFS_CALL_CL_REQUESTING, /* Client: Request is being sent */
64 AFS_CALL_CL_AWAIT_REPLY, /* Client: Awaiting reply */
65 AFS_CALL_CL_PROC_REPLY, /* Client: rxrpc call complete; processing reply */
66 AFS_CALL_SV_AWAIT_OP_ID, /* Server: Awaiting op ID */
67 AFS_CALL_SV_AWAIT_REQUEST, /* Server: Awaiting request data */
68 AFS_CALL_SV_REPLYING, /* Server: Replying */
69 AFS_CALL_SV_AWAIT_ACK, /* Server: Awaiting final ACK */
70 AFS_CALL_COMPLETE, /* Completed or failed */
74 * List of server addresses.
76 struct afs_addr_list {
79 u32 version; /* Version */
80 unsigned char max_addrs;
81 unsigned char nr_addrs;
82 unsigned char preferred; /* Preferred address */
83 unsigned char nr_ipv4; /* Number of IPv4 addresses */
84 enum dns_record_source source:8;
85 enum dns_lookup_status status:8;
86 unsigned long failed; /* Mask of addrs that failed locally/ICMP */
87 unsigned long responded; /* Mask of addrs that responded */
88 struct sockaddr_rxrpc addrs[];
89 #define AFS_MAX_ADDRESSES ((unsigned int)(sizeof(unsigned long) * 8))
93 * a record of an in-progress RxRPC call
96 const struct afs_call_type *type; /* type of call */
97 struct afs_addr_list *alist; /* Address is alist[addr_ix] */
98 wait_queue_head_t waitq; /* processes awaiting completion */
99 struct work_struct async_work; /* async I/O processor */
100 struct work_struct work; /* actual work processor */
101 struct rxrpc_call *rxcall; /* RxRPC call handle */
102 struct key *key; /* security for this call */
103 struct afs_net *net; /* The network namespace */
104 struct afs_server *server; /* The fileserver record if fs op (pins ref) */
105 struct afs_vlserver *vlserver; /* The vlserver record if vl op */
106 void *request; /* request data (first part) */
107 struct iov_iter def_iter; /* Default buffer/data iterator */
108 struct iov_iter *iter; /* Iterator currently in use */
109 union { /* Convenience for ->def_iter */
111 struct bio_vec bvec[1];
113 void *buffer; /* reply receive buffer */
115 long ret0; /* Value to reply with instead of 0 */
116 struct afs_addr_list *ret_alist;
117 struct afs_vldb_entry *ret_vldb;
120 struct afs_operation *op;
121 unsigned int server_index;
123 enum afs_call_state state;
124 spinlock_t state_lock;
125 int error; /* error code */
126 u32 abort_code; /* Remote abort ID or 0 */
127 unsigned int max_lifespan; /* Maximum lifespan to set if not 0 */
128 unsigned request_size; /* size of request data */
129 unsigned reply_max; /* maximum size of reply */
130 unsigned count2; /* count used in unmarshalling */
131 unsigned char unmarshall; /* unmarshalling phase */
132 unsigned char addr_ix; /* Address in ->alist */
133 bool drop_ref; /* T if need to drop ref for incoming call */
134 bool send_pages; /* T if data from mapping should be sent */
135 bool need_attention; /* T if RxRPC poked us */
136 bool async; /* T if asynchronous */
137 bool upgrade; /* T to request service upgrade */
138 bool have_reply_time; /* T if have got reply_time */
139 bool intr; /* T if interruptible */
140 bool unmarshalling_error; /* T if an unmarshalling error occurred */
141 u16 service_id; /* Actual service ID (after upgrade) */
142 unsigned int debug_id; /* Trace ID */
143 u32 operation_ID; /* operation ID for an incoming call */
144 u32 count; /* count for use in unmarshalling */
145 union { /* place to extract temporary data */
149 } __attribute__((packed));
152 ktime_t reply_time; /* Time of first reply packet */
155 struct afs_call_type {
157 unsigned int op; /* Really enum afs_fs_operation */
159 /* deliver request or reply data to an call
160 * - returning an error will cause the call to be aborted
162 int (*deliver)(struct afs_call *call);
164 /* clean up a call */
165 void (*destructor)(struct afs_call *call);
168 void (*work)(struct work_struct *work);
170 /* Call done function (gets called immediately on success or failure) */
171 void (*done)(struct afs_call *call);
175 * Key available for writeback on a file.
180 struct list_head vnode_link; /* Link in vnode->wb_keys */
184 * AFS open file information record. Pointed to by file->private_data.
187 struct key *key; /* The key this file was opened with */
188 struct afs_wb_key *wb; /* Writeback key record for this file */
191 static inline struct key *afs_file_key(struct file *file)
193 struct afs_file *af = file->private_data;
199 * Record of an outstanding read operation on a vnode.
202 loff_t pos; /* Where to start reading */
203 loff_t len; /* How much we're asking for */
204 loff_t actual_len; /* How much we're actually getting */
205 loff_t remain; /* Amount remaining */
206 loff_t file_size; /* File size returned by server */
207 afs_dataversion_t data_version; /* Version number returned by server */
209 unsigned int index; /* Which page we're reading into */
210 unsigned int nr_pages;
211 unsigned int offset; /* offset into current page */
212 struct afs_vnode *vnode;
213 void (*page_done)(struct afs_read *);
215 struct page *array[];
219 * AFS superblock private data
220 * - there's one superblock per volume
222 struct afs_super_info {
223 struct net *net_ns; /* Network namespace */
224 struct afs_cell *cell; /* The cell in which the volume resides */
225 struct afs_volume *volume; /* volume record */
226 enum afs_flock_mode flock_mode:8; /* File locking emulation mode */
227 bool dyn_root; /* True if dynamic root */
230 static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
232 return sb->s_fs_info;
235 extern struct file_system_type afs_fs_type;
238 * Set of substitutes for @sys.
240 struct afs_sysnames {
241 #define AFS_NR_SYSNAME 16
242 char *subs[AFS_NR_SYSNAME];
249 * AFS network namespace record.
252 struct net *net; /* Backpointer to the owning net namespace */
253 struct afs_uuid uuid;
254 bool live; /* F if this namespace is being removed */
256 /* AF_RXRPC I/O stuff */
257 struct socket *socket;
258 struct afs_call *spare_incoming_call;
259 struct work_struct charge_preallocation_work;
260 struct mutex socket_mutex;
261 atomic_t nr_outstanding_calls;
262 atomic_t nr_superblocks;
265 struct rb_root cells;
266 struct afs_cell __rcu *ws_cell;
267 struct work_struct cells_manager;
268 struct timer_list cells_timer;
269 atomic_t cells_outstanding;
270 seqlock_t cells_lock;
271 struct mutex cells_alias_lock;
273 struct mutex proc_cells_lock;
274 struct hlist_head proc_cells;
276 /* Known servers. Theoretically each fileserver can only be in one
277 * cell, but in practice, people create aliases and subsets and there's
278 * no easy way to distinguish them.
280 seqlock_t fs_lock; /* For fs_servers, fs_probe_*, fs_proc */
281 struct rb_root fs_servers; /* afs_server (by server UUID or address) */
282 struct list_head fs_probe_fast; /* List of afs_server to probe at 30s intervals */
283 struct list_head fs_probe_slow; /* List of afs_server to probe at 5m intervals */
284 struct hlist_head fs_proc; /* procfs servers list */
286 struct hlist_head fs_addresses4; /* afs_server (by lowest IPv4 addr) */
287 struct hlist_head fs_addresses6; /* afs_server (by lowest IPv6 addr) */
288 seqlock_t fs_addr_lock; /* For fs_addresses[46] */
290 struct work_struct fs_manager;
291 struct timer_list fs_timer;
293 struct work_struct fs_prober;
294 struct timer_list fs_probe_timer;
295 atomic_t servers_outstanding;
297 /* File locking renewal management */
298 struct mutex lock_manager_mutex;
301 struct super_block *dynroot_sb; /* Dynamic root mount superblock */
302 struct proc_dir_entry *proc_afs; /* /proc/net/afs directory */
303 struct afs_sysnames *sysnames;
304 rwlock_t sysnames_lock;
306 /* Statistics counters */
307 atomic_t n_lookup; /* Number of lookups done */
308 atomic_t n_reval; /* Number of dentries needing revalidation */
309 atomic_t n_inval; /* Number of invalidations by the server */
310 atomic_t n_relpg; /* Number of invalidations by releasepage */
311 atomic_t n_read_dir; /* Number of directory pages read */
312 atomic_t n_dir_cr; /* Number of directory entry creation edits */
313 atomic_t n_dir_rm; /* Number of directory entry removal edits */
314 atomic_t n_stores; /* Number of store ops */
315 atomic_long_t n_store_bytes; /* Number of bytes stored */
316 atomic_long_t n_fetch_bytes; /* Number of bytes fetched */
317 atomic_t n_fetches; /* Number of data fetch ops */
320 extern const char afs_init_sysname[];
322 enum afs_cell_state {
326 AFS_CELL_DEACTIVATING,
334 * This is a tricky concept to get right as it is possible to create aliases
335 * simply by pointing AFSDB/SRV records for two names at the same set of VL
336 * servers; it is also possible to do things like setting up two sets of VL
337 * servers, one of which provides a superset of the volumes provided by the
338 * other (for internal/external division, for example).
340 * Cells only exist in the sense that (a) a cell's name maps to a set of VL
341 * servers and (b) a cell's name is used by the client to select the key to use
342 * for authentication and encryption. The cell name is not typically used in
345 * Two cells are determined to be aliases if they have an explicit alias (YFS
346 * only), share any VL servers in common or have at least one volume in common.
347 * "In common" means that the address list of the VL servers or the fileservers
348 * share at least one endpoint.
353 struct rb_node net_node; /* Node in net->cells */
356 struct afs_cell *alias_of; /* The cell this is an alias of */
357 struct afs_volume *root_volume; /* The root.cell volume if there is one */
358 struct key *anonymous_key; /* anonymous user key for this cell */
359 struct work_struct manager; /* Manager for init/deinit/dns */
360 struct hlist_node proc_link; /* /proc cell list link */
361 #ifdef CONFIG_AFS_FSCACHE
362 struct fscache_cookie *cache; /* caching cookie */
364 time64_t dns_expiry; /* Time AFSDB/SRV record expires */
365 time64_t last_inactive; /* Time of last drop of usage count */
368 #define AFS_CELL_FL_NO_GC 0 /* The cell was added manually, don't auto-gc */
369 #define AFS_CELL_FL_DO_LOOKUP 1 /* DNS lookup requested */
370 #define AFS_CELL_FL_CHECK_ALIAS 2 /* Need to check for aliases */
371 enum afs_cell_state state;
373 enum dns_record_source dns_source:8; /* Latest source of data from lookup */
374 enum dns_lookup_status dns_status:8; /* Latest status of data from lookup */
375 unsigned int dns_lookup_count; /* Counter of DNS lookups */
377 /* The volumes belonging to this cell */
378 struct rb_root volumes; /* Tree of volumes on this server */
379 struct hlist_head proc_volumes; /* procfs volume list */
380 seqlock_t volume_lock; /* For volumes */
382 /* Active fileserver interaction state. */
383 struct rb_root fs_servers; /* afs_server (by server UUID) */
384 seqlock_t fs_lock; /* For fs_servers */
386 /* VL server list. */
387 rwlock_t vl_servers_lock; /* Lock on vl_servers */
388 struct afs_vlserver_list __rcu *vl_servers;
390 u8 name_len; /* Length of name */
391 char *name; /* Cell name, case-flattened and NUL-padded */
395 * Volume Location server record.
397 struct afs_vlserver {
399 struct afs_addr_list __rcu *addresses; /* List of addresses for this VL server */
401 #define AFS_VLSERVER_FL_PROBED 0 /* The VL server has been probed */
402 #define AFS_VLSERVER_FL_PROBING 1 /* VL server is being probed */
403 #define AFS_VLSERVER_FL_IS_YFS 2 /* Server is YFS not AFS */
404 #define AFS_VLSERVER_FL_RESPONDING 3 /* VL server is responding */
405 rwlock_t lock; /* Lock on addresses */
407 unsigned int rtt; /* Server's current RTT in uS */
410 wait_queue_head_t probe_wq;
411 atomic_t probe_outstanding;
412 spinlock_t probe_lock;
414 unsigned int rtt; /* RTT in uS */
417 unsigned short flags;
418 #define AFS_VLSERVER_PROBE_RESPONDED 0x01 /* At least once response (may be abort) */
419 #define AFS_VLSERVER_PROBE_IS_YFS 0x02 /* The peer appears to be YFS */
420 #define AFS_VLSERVER_PROBE_NOT_YFS 0x04 /* The peer appears not to be YFS */
421 #define AFS_VLSERVER_PROBE_LOCAL_FAILURE 0x08 /* A local failure prevented a probe */
425 u16 name_len; /* Length of name */
426 char name[]; /* Server name, case-flattened */
430 * Weighted list of Volume Location servers.
432 struct afs_vlserver_entry {
433 u16 priority; /* Preference (as SRV) */
434 u16 weight; /* Weight (as SRV) */
435 enum dns_record_source source:8;
436 enum dns_lookup_status status:8;
437 struct afs_vlserver *server;
440 struct afs_vlserver_list {
444 u8 index; /* Server currently in use */
445 u8 preferred; /* Preferred server */
446 enum dns_record_source source:8;
447 enum dns_lookup_status status:8;
449 struct afs_vlserver_entry servers[];
455 * This is pointed to by cell->vldb_entries, indexed by name.
457 struct afs_vldb_entry {
458 afs_volid_t vid[3]; /* Volume IDs for R/W, R/O and Bak volumes */
461 #define AFS_VLDB_HAS_RW 0 /* - R/W volume exists */
462 #define AFS_VLDB_HAS_RO 1 /* - R/O volume exists */
463 #define AFS_VLDB_HAS_BAK 2 /* - Backup volume exists */
464 #define AFS_VLDB_QUERY_VALID 3 /* - Record is valid */
465 #define AFS_VLDB_QUERY_ERROR 4 /* - VL server returned error */
467 uuid_t fs_server[AFS_NMAXNSERVERS];
468 u32 addr_version[AFS_NMAXNSERVERS]; /* Registration change counters */
469 u8 fs_mask[AFS_NMAXNSERVERS];
470 #define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */
471 #define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */
472 #define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */
474 u8 nr_servers; /* Number of server records */
476 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
480 * Record of fileserver with which we're actively communicating.
485 uuid_t uuid; /* Server ID */
486 struct afs_uuid _uuid;
489 struct afs_addr_list __rcu *addresses;
490 struct afs_cell *cell; /* Cell to which belongs (pins ref) */
491 struct rb_node uuid_rb; /* Link in net->fs_servers */
492 struct afs_server __rcu *uuid_next; /* Next server with same UUID */
493 struct afs_server *uuid_prev; /* Previous server with same UUID */
494 struct list_head probe_link; /* Link in net->fs_probe_list */
495 struct hlist_node addr4_link; /* Link in net->fs_addresses4 */
496 struct hlist_node addr6_link; /* Link in net->fs_addresses6 */
497 struct hlist_node proc_link; /* Link in net->fs_proc */
498 struct afs_server *gc_next; /* Next server in manager's list */
499 time64_t unuse_time; /* Time at which last unused */
501 #define AFS_SERVER_FL_RESPONDING 0 /* The server is responding */
502 #define AFS_SERVER_FL_UPDATING 1
503 #define AFS_SERVER_FL_NEEDS_UPDATE 2 /* Fileserver address list is out of date */
504 #define AFS_SERVER_FL_NOT_READY 4 /* The record is not ready for use */
505 #define AFS_SERVER_FL_NOT_FOUND 5 /* VL server says no such server */
506 #define AFS_SERVER_FL_VL_FAIL 6 /* Failed to access VL server */
507 #define AFS_SERVER_FL_MAY_HAVE_CB 8 /* May have callbacks on this fileserver */
508 #define AFS_SERVER_FL_IS_YFS 16 /* Server is YFS not AFS */
509 #define AFS_SERVER_FL_NO_IBULK 17 /* Fileserver doesn't support FS.InlineBulkStatus */
510 #define AFS_SERVER_FL_NO_RM2 18 /* Fileserver doesn't support YFS.RemoveFile2 */
511 atomic_t ref; /* Object refcount */
512 atomic_t active; /* Active user count */
513 u32 addr_version; /* Address list version */
514 unsigned int rtt; /* Server's current RTT in uS */
515 unsigned int debug_id; /* Debugging ID for traces */
517 /* file service access */
518 rwlock_t fs_lock; /* access lock */
520 /* callback promise management */
521 unsigned cb_s_break; /* Break-everything counter. */
524 unsigned long probed_at; /* Time last probe was dispatched (jiffies) */
525 wait_queue_head_t probe_wq;
526 atomic_t probe_outstanding;
527 spinlock_t probe_lock;
529 unsigned int rtt; /* RTT in uS */
535 bool local_failure:1;
540 * Replaceable volume server list.
542 struct afs_server_entry {
543 struct afs_server *server;
546 struct afs_server_list {
547 afs_volid_t vids[AFS_MAXTYPES]; /* Volume IDs */
549 unsigned char nr_servers;
550 unsigned char preferred; /* Preferred server */
551 unsigned short vnovol_mask; /* Servers to be skipped due to VNOVOL */
552 unsigned int seq; /* Set to ->servers_seq when installed */
554 struct afs_server_entry servers[];
558 * Live AFS volume management.
563 afs_volid_t vid; /* volume ID */
566 time64_t update_at; /* Time at which to next update */
567 struct afs_cell *cell; /* Cell to which belongs (pins ref) */
568 struct rb_node cell_node; /* Link in cell->volumes */
569 struct hlist_node proc_link; /* Link in cell->proc_volumes */
570 struct super_block __rcu *sb; /* Superblock on which inodes reside */
572 #define AFS_VOLUME_NEEDS_UPDATE 0 /* - T if an update needs performing */
573 #define AFS_VOLUME_UPDATING 1 /* - T if an update is in progress */
574 #define AFS_VOLUME_WAIT 2 /* - T if users must wait for update */
575 #define AFS_VOLUME_DELETED 3 /* - T if volume appears deleted */
576 #define AFS_VOLUME_OFFLINE 4 /* - T if volume offline notice given */
577 #define AFS_VOLUME_BUSY 5 /* - T if volume busy notice given */
578 #define AFS_VOLUME_MAYBE_NO_IBULK 6 /* - T if some servers don't have InlineBulkStatus */
579 #ifdef CONFIG_AFS_FSCACHE
580 struct fscache_cookie *cache; /* caching cookie */
582 struct afs_server_list __rcu *servers; /* List of servers on which volume resides */
583 rwlock_t servers_lock; /* Lock for ->servers */
584 unsigned int servers_seq; /* Incremented each time ->servers changes */
586 unsigned cb_v_break; /* Break-everything counter. */
587 rwlock_t cb_v_break_lock;
589 afs_voltype_t type; /* type of volume */
590 char type_force; /* force volume type (suppress R/O -> R/W) */
592 u8 name[AFS_MAXVOLNAME + 1]; /* NUL-padded volume name */
595 enum afs_lock_state {
596 AFS_VNODE_LOCK_NONE, /* The vnode has no lock on the server */
597 AFS_VNODE_LOCK_WAITING_FOR_CB, /* We're waiting for the server to break the callback */
598 AFS_VNODE_LOCK_SETTING, /* We're asking the server for a lock */
599 AFS_VNODE_LOCK_GRANTED, /* We have a lock on the server */
600 AFS_VNODE_LOCK_EXTENDING, /* We're extending a lock on the server */
601 AFS_VNODE_LOCK_NEED_UNLOCK, /* We need to unlock on the server */
602 AFS_VNODE_LOCK_UNLOCKING, /* We're telling the server to unlock */
603 AFS_VNODE_LOCK_DELETED, /* The vnode has been deleted whilst we have a lock */
607 * AFS inode private data.
609 * Note that afs_alloc_inode() *must* reset anything that could incorrectly
610 * leak from one inode to another.
613 struct inode vfs_inode; /* the VFS's inode record */
615 struct afs_volume *volume; /* volume on which vnode resides */
616 struct afs_fid fid; /* the file identifier for this inode */
617 struct afs_file_status status; /* AFS status info for this file */
618 afs_dataversion_t invalid_before; /* Child dentries are invalid before this */
619 #ifdef CONFIG_AFS_FSCACHE
620 struct fscache_cookie *cache; /* caching cookie */
622 struct afs_permits __rcu *permit_cache; /* cache of permits so far obtained */
623 struct mutex io_lock; /* Lock for serialising I/O on this mutex */
624 struct rw_semaphore validate_lock; /* lock for validating this vnode */
625 struct rw_semaphore rmdir_lock; /* Lock for rmdir vs sillyrename */
626 struct key *silly_key; /* Silly rename key */
627 spinlock_t wb_lock; /* lock for wb_keys */
628 spinlock_t lock; /* waitqueue/flags lock */
630 #define AFS_VNODE_CB_PROMISED 0 /* Set if vnode has a callback promise */
631 #define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */
632 #define AFS_VNODE_DIR_VALID 2 /* Set if dir contents are valid */
633 #define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */
634 #define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */
635 #define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */
636 #define AFS_VNODE_AUTOCELL 6 /* set if Vnode is an auto mount point */
637 #define AFS_VNODE_PSEUDODIR 7 /* set if Vnode is a pseudo directory */
638 #define AFS_VNODE_NEW_CONTENT 8 /* Set if file has new content (create/trunc-0) */
639 #define AFS_VNODE_SILLY_DELETED 9 /* Set if file has been silly-deleted */
641 struct list_head wb_keys; /* List of keys available for writeback */
642 struct list_head pending_locks; /* locks waiting to be granted */
643 struct list_head granted_locks; /* locks granted on this file */
644 struct delayed_work lock_work; /* work to be done in locking */
645 struct key *lock_key; /* Key to be used in lock ops */
646 ktime_t locked_at; /* Time at which lock obtained */
647 enum afs_lock_state lock_state : 8;
648 afs_lock_type_t lock_type : 8;
650 /* outstanding callback notification on this file */
651 void *cb_server; /* Server with callback/filelock */
652 unsigned int cb_s_break; /* Mass break counter on ->server */
653 unsigned int cb_v_break; /* Mass break counter on ->volume */
654 unsigned int cb_break; /* Break counter on vnode */
655 seqlock_t cb_lock; /* Lock for ->cb_server, ->status, ->cb_*break */
657 time64_t cb_expires_at; /* time at which callback expires */
660 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode)
662 #ifdef CONFIG_AFS_FSCACHE
670 * cached security record for one user's attempt to access a vnode
673 struct key *key; /* RxRPC ticket holding a security context */
674 afs_access_t access; /* CallerAccess value for this key */
678 * Immutable cache of CallerAccess records from attempts to access vnodes.
679 * These may be shared between multiple vnodes.
683 struct hlist_node hash_node; /* Link in hash */
684 unsigned long h; /* Hash value for this permit list */
686 unsigned short nr_permits; /* Number of records */
687 bool invalidated; /* Invalidated due to key change */
688 struct afs_permit permits[]; /* List of permits sorted by key pointer */
692 * Error prioritisation and accumulation.
695 short error; /* Accumulated error */
696 bool responded; /* T if server responded */
700 * Cursor for iterating over a server's address list.
702 struct afs_addr_cursor {
703 struct afs_addr_list *alist; /* Current address list (pins ref) */
704 unsigned long tried; /* Tried addresses */
705 signed char index; /* Current address */
706 bool responded; /* T if the current address responded */
707 unsigned short nr_iterations; /* Number of address iterations */
713 * Cursor for iterating over a set of volume location servers.
715 struct afs_vl_cursor {
716 struct afs_addr_cursor ac;
717 struct afs_cell *cell; /* The cell we're querying */
718 struct afs_vlserver_list *server_list; /* Current server list (pins ref) */
719 struct afs_vlserver *server; /* Server on which this resides */
720 struct key *key; /* Key for the server */
721 unsigned long untried; /* Bitmask of untried servers */
722 short index; /* Current server */
724 unsigned short flags;
725 #define AFS_VL_CURSOR_STOP 0x0001 /* Set to cease iteration */
726 #define AFS_VL_CURSOR_RETRY 0x0002 /* Set to do a retry */
727 #define AFS_VL_CURSOR_RETRIED 0x0004 /* Set if started a retry */
728 unsigned short nr_iterations; /* Number of server iterations */
732 * Fileserver operation methods.
734 struct afs_operation_ops {
735 void (*issue_afs_rpc)(struct afs_operation *op);
736 void (*issue_yfs_rpc)(struct afs_operation *op);
737 void (*success)(struct afs_operation *op);
738 void (*aborted)(struct afs_operation *op);
739 void (*edit_dir)(struct afs_operation *op);
740 void (*put)(struct afs_operation *op);
743 struct afs_vnode_param {
744 struct afs_vnode *vnode;
745 struct afs_fid fid; /* Fid to access */
746 struct afs_status_cb scb; /* Returned status and callback promise */
747 afs_dataversion_t dv_before; /* Data version before the call */
748 unsigned int cb_break_before; /* cb_break + cb_s_break before the call */
749 u8 dv_delta; /* Expected change in data version */
750 bool put_vnode:1; /* T if we have a ref on the vnode */
751 bool need_io_lock:1; /* T if we need the I/O lock on this */
752 bool update_ctime:1; /* Need to update the ctime */
753 bool set_size:1; /* Must update i_size */
754 bool op_unlinked:1; /* True if file was unlinked by op */
758 * Fileserver operation wrapper, handling server and address rotation
759 * asynchronously. May make simultaneous calls to multiple servers.
761 struct afs_operation {
762 struct afs_net *net; /* Network namespace */
763 struct key *key; /* Key for the cell */
764 const struct afs_call_type *type; /* Type of call done */
765 const struct afs_operation_ops *ops;
767 /* Parameters/results for the operation */
768 struct afs_volume *volume; /* Volume being accessed */
769 struct afs_vnode_param file[2];
770 struct afs_vnode_param *more_files;
771 struct afs_volsync volsync;
772 struct dentry *dentry; /* Dentry to be altered */
773 struct dentry *dentry_2; /* Second dentry to be altered */
774 struct timespec64 mtime; /* Modification time to record */
775 struct timespec64 ctime; /* Change time to set */
776 short nr_files; /* Number of entries in file[], more_files */
778 unsigned int debug_id;
780 unsigned int cb_v_break; /* Volume break counter before op */
781 unsigned int cb_s_break; /* Server break counter before op */
785 int which; /* Which ->file[] to fetch for */
788 int reason; /* enum afs_edit_dir_reason */
796 struct dentry *rehash;
801 struct afs_read *req;
804 afs_lock_type_t type;
807 struct address_space *mapping; /* Pages being written from */
808 pgoff_t first; /* first page in mapping to deal with */
809 pgoff_t last; /* last page in mapping to deal with */
810 unsigned first_offset; /* offset into mapping[first] */
811 unsigned last_to; /* amount of mapping[last] */
818 struct yfs_acl *yacl;
820 struct afs_volume_status vs;
825 /* Fileserver iteration state */
826 struct afs_addr_cursor ac;
827 struct afs_server_list *server_list; /* Current server list (pins ref) */
828 struct afs_server *server; /* Server we're using (ref pinned by server_list) */
829 struct afs_call *call;
830 unsigned long untried; /* Bitmask of untried servers */
831 short index; /* Current server */
832 unsigned short nr_iterations; /* Number of server iterations */
835 #define AFS_OPERATION_STOP 0x0001 /* Set to cease iteration */
836 #define AFS_OPERATION_VBUSY 0x0002 /* Set if seen VBUSY */
837 #define AFS_OPERATION_VMOVED 0x0004 /* Set if seen VMOVED */
838 #define AFS_OPERATION_VNOVOL 0x0008 /* Set if seen VNOVOL */
839 #define AFS_OPERATION_CUR_ONLY 0x0010 /* Set if current server only (file lock held) */
840 #define AFS_OPERATION_NO_VSLEEP 0x0020 /* Set to prevent sleep on VBUSY, VOFFLINE, ... */
841 #define AFS_OPERATION_UNINTR 0x0040 /* Set if op is uninterruptible */
842 #define AFS_OPERATION_DOWNGRADE 0x0080 /* Set to retry with downgraded opcode */
843 #define AFS_OPERATION_LOCK_0 0x0100 /* Set if have io_lock on file[0] */
844 #define AFS_OPERATION_LOCK_1 0x0200 /* Set if have io_lock on file[1] */
845 #define AFS_OPERATION_TRIED_ALL 0x0400 /* Set if we've tried all the fileservers */
846 #define AFS_OPERATION_RETRY_SERVER 0x0800 /* Set if we should retry the current server */
847 #define AFS_OPERATION_DIR_CONFLICT 0x1000 /* Set if we detected a 3rd-party dir change */
851 * Cache auxiliary data.
853 struct afs_vnode_cache_aux {
857 #include <trace/events/afs.h>
859 /*****************************************************************************/
863 static inline struct afs_addr_list *afs_get_addrlist(struct afs_addr_list *alist)
866 refcount_inc(&alist->usage);
869 extern struct afs_addr_list *afs_alloc_addrlist(unsigned int,
872 extern void afs_put_addrlist(struct afs_addr_list *);
873 extern struct afs_vlserver_list *afs_parse_text_addrs(struct afs_net *,
874 const char *, size_t, char,
875 unsigned short, unsigned short);
876 extern struct afs_vlserver_list *afs_dns_query(struct afs_cell *, time64_t *);
877 extern bool afs_iterate_addresses(struct afs_addr_cursor *);
878 extern int afs_end_cursor(struct afs_addr_cursor *);
880 extern void afs_merge_fs_addr4(struct afs_addr_list *, __be32, u16);
881 extern void afs_merge_fs_addr6(struct afs_addr_list *, __be32 *, u16);
886 #ifdef CONFIG_AFS_FSCACHE
887 extern struct fscache_netfs afs_cache_netfs;
888 extern struct fscache_cookie_def afs_cell_cache_index_def;
889 extern struct fscache_cookie_def afs_volume_cache_index_def;
890 extern struct fscache_cookie_def afs_vnode_cache_index_def;
892 #define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL)
893 #define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL)
894 #define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL)
900 extern void afs_init_callback_state(struct afs_server *);
901 extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason);
902 extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason);
903 extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *);
905 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode)
907 return vnode->cb_break + vnode->cb_v_break;
910 static inline bool afs_cb_is_broken(unsigned int cb_break,
911 const struct afs_vnode *vnode)
913 return cb_break != (vnode->cb_break + vnode->volume->cb_v_break);
919 extern int afs_cell_init(struct afs_net *, const char *);
920 extern struct afs_cell *afs_lookup_cell_rcu(struct afs_net *, const char *, unsigned);
921 extern struct afs_cell *afs_lookup_cell(struct afs_net *, const char *, unsigned,
923 extern struct afs_cell *afs_get_cell(struct afs_cell *);
924 extern void afs_put_cell(struct afs_net *, struct afs_cell *);
925 extern void afs_manage_cells(struct work_struct *);
926 extern void afs_cells_timer(struct timer_list *);
927 extern void __net_exit afs_cell_purge(struct afs_net *);
932 extern bool afs_cm_incoming_call(struct afs_call *);
937 extern const struct file_operations afs_dir_file_operations;
938 extern const struct inode_operations afs_dir_inode_operations;
939 extern const struct address_space_operations afs_dir_aops;
940 extern const struct dentry_operations afs_fs_dentry_operations;
942 extern void afs_d_release(struct dentry *);
943 extern void afs_check_for_remote_deletion(struct afs_operation *);
948 extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *,
949 enum afs_edit_dir_reason);
950 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason);
955 extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *,
956 struct dentry *, struct key *);
957 extern int afs_silly_iput(struct dentry *, struct inode *);
962 extern const struct inode_operations afs_dynroot_inode_operations;
963 extern const struct dentry_operations afs_dynroot_dentry_operations;
965 extern struct inode *afs_try_auto_mntpt(struct dentry *, struct inode *);
966 extern int afs_dynroot_mkdir(struct afs_net *, struct afs_cell *);
967 extern void afs_dynroot_rmdir(struct afs_net *, struct afs_cell *);
968 extern int afs_dynroot_populate(struct super_block *);
969 extern void afs_dynroot_depopulate(struct super_block *);
974 extern const struct address_space_operations afs_fs_aops;
975 extern const struct inode_operations afs_file_inode_operations;
976 extern const struct file_operations afs_file_operations;
978 extern int afs_cache_wb_key(struct afs_vnode *, struct afs_file *);
979 extern void afs_put_wb_key(struct afs_wb_key *);
980 extern int afs_open(struct inode *, struct file *);
981 extern int afs_release(struct inode *, struct file *);
982 extern int afs_fetch_data(struct afs_vnode *, struct key *, struct afs_read *);
983 extern int afs_page_filler(void *, struct page *);
984 extern void afs_put_read(struct afs_read *);
986 static inline struct afs_read *afs_get_read(struct afs_read *req)
988 refcount_inc(&req->usage);
995 extern struct workqueue_struct *afs_lock_manager;
997 extern void afs_lock_op_done(struct afs_call *);
998 extern void afs_lock_work(struct work_struct *);
999 extern void afs_lock_may_be_available(struct afs_vnode *);
1000 extern int afs_lock(struct file *, int, struct file_lock *);
1001 extern int afs_flock(struct file *, int, struct file_lock *);
1006 extern void afs_fs_fetch_status(struct afs_operation *);
1007 extern void afs_fs_fetch_data(struct afs_operation *);
1008 extern void afs_fs_create_file(struct afs_operation *);
1009 extern void afs_fs_make_dir(struct afs_operation *);
1010 extern void afs_fs_remove_file(struct afs_operation *);
1011 extern void afs_fs_remove_dir(struct afs_operation *);
1012 extern void afs_fs_link(struct afs_operation *);
1013 extern void afs_fs_symlink(struct afs_operation *);
1014 extern void afs_fs_rename(struct afs_operation *);
1015 extern void afs_fs_store_data(struct afs_operation *);
1016 extern void afs_fs_setattr(struct afs_operation *);
1017 extern void afs_fs_get_volume_status(struct afs_operation *);
1018 extern void afs_fs_set_lock(struct afs_operation *);
1019 extern void afs_fs_extend_lock(struct afs_operation *);
1020 extern void afs_fs_release_lock(struct afs_operation *);
1021 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *,
1022 struct afs_addr_cursor *, struct key *);
1023 extern bool afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
1024 struct afs_addr_cursor *, struct key *);
1025 extern void afs_fs_inline_bulk_status(struct afs_operation *);
1032 extern void afs_fs_fetch_acl(struct afs_operation *);
1033 extern void afs_fs_store_acl(struct afs_operation *);
1038 extern struct afs_operation *afs_alloc_operation(struct key *, struct afs_volume *);
1039 extern int afs_put_operation(struct afs_operation *);
1040 extern bool afs_begin_vnode_operation(struct afs_operation *);
1041 extern void afs_wait_for_operation(struct afs_operation *);
1042 extern int afs_do_sync_operation(struct afs_operation *);
1044 static inline void afs_op_nomem(struct afs_operation *op)
1046 op->error = -ENOMEM;
1049 static inline void afs_op_set_vnode(struct afs_operation *op, unsigned int n,
1050 struct afs_vnode *vnode)
1052 op->file[n].vnode = vnode;
1053 op->file[n].need_io_lock = true;
1056 static inline void afs_op_set_fid(struct afs_operation *op, unsigned int n,
1057 const struct afs_fid *fid)
1059 op->file[n].fid = *fid;
1065 extern void afs_fileserver_probe_result(struct afs_call *);
1066 extern void afs_fs_probe_fileserver(struct afs_net *, struct afs_server *, struct key *, bool);
1067 extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long);
1068 extern void afs_probe_fileserver(struct afs_net *, struct afs_server *);
1069 extern void afs_fs_probe_dispatcher(struct work_struct *);
1070 extern int afs_wait_for_one_fs_probe(struct afs_server *, bool);
1071 extern void afs_fs_probe_cleanup(struct afs_net *);
1076 extern const struct afs_operation_ops afs_fetch_status_operation;
1078 extern void afs_vnode_commit_status(struct afs_operation *, struct afs_vnode_param *);
1079 extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *);
1080 extern int afs_ilookup5_test_by_fid(struct inode *, void *);
1081 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool);
1082 extern struct inode *afs_iget(struct afs_operation *, struct afs_vnode_param *);
1083 extern struct inode *afs_root_iget(struct super_block *, struct key *);
1084 extern bool afs_check_validity(struct afs_vnode *);
1085 extern int afs_validate(struct afs_vnode *, struct key *);
1086 extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int);
1087 extern int afs_setattr(struct dentry *, struct iattr *);
1088 extern void afs_evict_inode(struct inode *);
1089 extern int afs_drop_inode(struct inode *);
1094 extern struct workqueue_struct *afs_wq;
1095 extern int afs_net_id;
1097 static inline struct afs_net *afs_net(struct net *net)
1099 return net_generic(net, afs_net_id);
1102 static inline struct afs_net *afs_sb2net(struct super_block *sb)
1104 return afs_net(AFS_FS_S(sb)->net_ns);
1107 static inline struct afs_net *afs_d2net(struct dentry *dentry)
1109 return afs_sb2net(dentry->d_sb);
1112 static inline struct afs_net *afs_i2net(struct inode *inode)
1114 return afs_sb2net(inode->i_sb);
1117 static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
1119 return afs_i2net(&vnode->vfs_inode);
1122 static inline struct afs_net *afs_sock2net(struct sock *sk)
1124 return net_generic(sock_net(sk), afs_net_id);
1127 static inline void __afs_stat(atomic_t *s)
1132 #define afs_stat_v(vnode, n) __afs_stat(&afs_v2net(vnode)->n)
1137 extern int afs_abort_to_error(u32);
1138 extern void afs_prioritise_error(struct afs_error *, int, u32);
1143 extern const struct inode_operations afs_mntpt_inode_operations;
1144 extern const struct inode_operations afs_autocell_inode_operations;
1145 extern const struct file_operations afs_mntpt_file_operations;
1147 extern struct vfsmount *afs_d_automount(struct path *);
1148 extern void afs_mntpt_kill_timer(void);
1153 #ifdef CONFIG_PROC_FS
1154 extern int __net_init afs_proc_init(struct afs_net *);
1155 extern void __net_exit afs_proc_cleanup(struct afs_net *);
1156 extern int afs_proc_cell_setup(struct afs_cell *);
1157 extern void afs_proc_cell_remove(struct afs_cell *);
1158 extern void afs_put_sysnames(struct afs_sysnames *);
1160 static inline int afs_proc_init(struct afs_net *net) { return 0; }
1161 static inline void afs_proc_cleanup(struct afs_net *net) {}
1162 static inline int afs_proc_cell_setup(struct afs_cell *cell) { return 0; }
1163 static inline void afs_proc_cell_remove(struct afs_cell *cell) {}
1164 static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {}
1170 extern bool afs_select_fileserver(struct afs_operation *);
1171 extern void afs_dump_edestaddrreq(const struct afs_operation *);
1176 extern struct workqueue_struct *afs_async_calls;
1178 extern int __net_init afs_open_socket(struct afs_net *);
1179 extern void __net_exit afs_close_socket(struct afs_net *);
1180 extern void afs_charge_preallocation(struct work_struct *);
1181 extern void afs_put_call(struct afs_call *);
1182 extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t);
1183 extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *);
1184 extern struct afs_call *afs_alloc_flat_call(struct afs_net *,
1185 const struct afs_call_type *,
1187 extern void afs_flat_call_destructor(struct afs_call *);
1188 extern void afs_send_empty_reply(struct afs_call *);
1189 extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
1190 extern int afs_extract_data(struct afs_call *, bool);
1191 extern int afs_protocol_error(struct afs_call *, enum afs_eproto_cause);
1193 static inline void afs_make_op_call(struct afs_operation *op, struct afs_call *call,
1197 op->type = call->type;
1199 call->key = op->key;
1200 call->intr = !(op->flags & AFS_OPERATION_UNINTR);
1201 afs_make_call(&op->ac, call, gfp);
1204 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size)
1206 call->kvec[0].iov_base = buf;
1207 call->kvec[0].iov_len = size;
1208 iov_iter_kvec(&call->def_iter, READ, call->kvec, 1, size);
1211 static inline void afs_extract_to_tmp(struct afs_call *call)
1213 afs_extract_begin(call, &call->tmp, sizeof(call->tmp));
1216 static inline void afs_extract_to_tmp64(struct afs_call *call)
1218 afs_extract_begin(call, &call->tmp64, sizeof(call->tmp64));
1221 static inline void afs_extract_discard(struct afs_call *call, size_t size)
1223 iov_iter_discard(&call->def_iter, READ, size);
1226 static inline void afs_extract_to_buf(struct afs_call *call, size_t size)
1228 afs_extract_begin(call, call->buffer, size);
1231 static inline int afs_transfer_reply(struct afs_call *call)
1233 return afs_extract_data(call, false);
1236 static inline bool afs_check_call_state(struct afs_call *call,
1237 enum afs_call_state state)
1239 return READ_ONCE(call->state) == state;
1242 static inline bool afs_set_call_state(struct afs_call *call,
1243 enum afs_call_state from,
1244 enum afs_call_state to)
1248 spin_lock_bh(&call->state_lock);
1249 if (call->state == from) {
1251 trace_afs_call_state(call, from, to, 0, 0);
1254 spin_unlock_bh(&call->state_lock);
1258 static inline void afs_set_call_complete(struct afs_call *call,
1259 int error, u32 remote_abort)
1261 enum afs_call_state state;
1264 spin_lock_bh(&call->state_lock);
1265 state = call->state;
1266 if (state != AFS_CALL_COMPLETE) {
1267 call->abort_code = remote_abort;
1268 call->error = error;
1269 call->state = AFS_CALL_COMPLETE;
1270 trace_afs_call_state(call, state, AFS_CALL_COMPLETE,
1271 error, remote_abort);
1274 spin_unlock_bh(&call->state_lock);
1276 trace_afs_call_done(call);
1278 /* Asynchronous calls have two refs to release - one from the alloc and
1279 * one queued with the work item - and we can't just deallocate the
1280 * call because the work item may be queued again.
1290 extern void afs_put_permits(struct afs_permits *);
1291 extern void afs_clear_permits(struct afs_vnode *);
1292 extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int,
1293 struct afs_status_cb *);
1294 extern void afs_zap_permits(struct rcu_head *);
1295 extern struct key *afs_request_key(struct afs_cell *);
1296 extern struct key *afs_request_key_rcu(struct afs_cell *);
1297 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *);
1298 extern int afs_permission(struct inode *, int);
1299 extern void __exit afs_clean_up_permit_cache(void);
1304 extern spinlock_t afs_server_peer_lock;
1306 extern struct afs_server *afs_find_server(struct afs_net *,
1307 const struct sockaddr_rxrpc *);
1308 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *);
1309 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *, u32);
1310 extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace);
1311 extern struct afs_server *afs_use_server(struct afs_server *, enum afs_server_trace);
1312 extern void afs_unuse_server(struct afs_net *, struct afs_server *, enum afs_server_trace);
1313 extern void afs_unuse_server_notime(struct afs_net *, struct afs_server *, enum afs_server_trace);
1314 extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace);
1315 extern void afs_manage_servers(struct work_struct *);
1316 extern void afs_servers_timer(struct timer_list *);
1317 extern void afs_fs_probe_timer(struct timer_list *);
1318 extern void __net_exit afs_purge_servers(struct afs_net *);
1319 extern bool afs_check_server_record(struct afs_operation *, struct afs_server *);
1321 static inline void afs_inc_servers_outstanding(struct afs_net *net)
1323 atomic_inc(&net->servers_outstanding);
1326 static inline void afs_dec_servers_outstanding(struct afs_net *net)
1328 if (atomic_dec_and_test(&net->servers_outstanding))
1329 wake_up_var(&net->servers_outstanding);
1332 static inline bool afs_is_probing_server(struct afs_server *server)
1334 return list_empty(&server->probe_link);
1340 static inline struct afs_server_list *afs_get_serverlist(struct afs_server_list *slist)
1342 refcount_inc(&slist->usage);
1346 extern void afs_put_serverlist(struct afs_net *, struct afs_server_list *);
1347 extern struct afs_server_list *afs_alloc_server_list(struct afs_cell *, struct key *,
1348 struct afs_vldb_entry *,
1350 extern bool afs_annotate_server_list(struct afs_server_list *, struct afs_server_list *);
1355 extern int __init afs_fs_init(void);
1356 extern void afs_fs_exit(void);
1361 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *,
1363 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *);
1364 extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *,
1365 struct key *, struct afs_vlserver *, unsigned int);
1366 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *);
1367 extern char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *);
1372 extern int afs_cell_detect_alias(struct afs_cell *, struct key *);
1377 extern void afs_vlserver_probe_result(struct afs_call *);
1378 extern int afs_send_vl_probes(struct afs_net *, struct key *, struct afs_vlserver_list *);
1379 extern int afs_wait_for_vl_probes(struct afs_vlserver_list *, unsigned long);
1384 extern bool afs_begin_vlserver_operation(struct afs_vl_cursor *,
1385 struct afs_cell *, struct key *);
1386 extern bool afs_select_vlserver(struct afs_vl_cursor *);
1387 extern bool afs_select_current_vlserver(struct afs_vl_cursor *);
1388 extern int afs_end_vlserver_operation(struct afs_vl_cursor *);
1393 static inline struct afs_vlserver *afs_get_vlserver(struct afs_vlserver *vlserver)
1395 atomic_inc(&vlserver->usage);
1399 static inline struct afs_vlserver_list *afs_get_vlserverlist(struct afs_vlserver_list *vllist)
1402 atomic_inc(&vllist->usage);
1406 extern struct afs_vlserver *afs_alloc_vlserver(const char *, size_t, unsigned short);
1407 extern void afs_put_vlserver(struct afs_net *, struct afs_vlserver *);
1408 extern struct afs_vlserver_list *afs_alloc_vlserver_list(unsigned int);
1409 extern void afs_put_vlserverlist(struct afs_net *, struct afs_vlserver_list *);
1410 extern struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *,
1411 const void *, size_t);
1416 extern struct afs_volume *afs_create_volume(struct afs_fs_context *);
1417 extern void afs_activate_volume(struct afs_volume *);
1418 extern void afs_deactivate_volume(struct afs_volume *);
1419 extern struct afs_volume *afs_get_volume(struct afs_volume *, enum afs_volume_trace);
1420 extern void afs_put_volume(struct afs_net *, struct afs_volume *, enum afs_volume_trace);
1421 extern int afs_check_volume_status(struct afs_volume *, struct afs_operation *);
1426 extern int afs_set_page_dirty(struct page *);
1427 extern int afs_write_begin(struct file *file, struct address_space *mapping,
1428 loff_t pos, unsigned len, unsigned flags,
1429 struct page **pagep, void **fsdata);
1430 extern int afs_write_end(struct file *file, struct address_space *mapping,
1431 loff_t pos, unsigned len, unsigned copied,
1432 struct page *page, void *fsdata);
1433 extern int afs_writepage(struct page *, struct writeback_control *);
1434 extern int afs_writepages(struct address_space *, struct writeback_control *);
1435 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *);
1436 extern int afs_fsync(struct file *, loff_t, loff_t, int);
1437 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf);
1438 extern void afs_prune_wb_keys(struct afs_vnode *);
1439 extern int afs_launder_page(struct page *);
1444 extern const struct xattr_handler *afs_xattr_handlers[];
1445 extern ssize_t afs_listxattr(struct dentry *, char *, size_t);
1450 extern void yfs_fs_fetch_data(struct afs_operation *);
1451 extern void yfs_fs_create_file(struct afs_operation *);
1452 extern void yfs_fs_make_dir(struct afs_operation *);
1453 extern void yfs_fs_remove_file2(struct afs_operation *);
1454 extern void yfs_fs_remove_file(struct afs_operation *);
1455 extern void yfs_fs_remove_dir(struct afs_operation *);
1456 extern void yfs_fs_link(struct afs_operation *);
1457 extern void yfs_fs_symlink(struct afs_operation *);
1458 extern void yfs_fs_rename(struct afs_operation *);
1459 extern void yfs_fs_store_data(struct afs_operation *);
1460 extern void yfs_fs_setattr(struct afs_operation *);
1461 extern void yfs_fs_get_volume_status(struct afs_operation *);
1462 extern void yfs_fs_set_lock(struct afs_operation *);
1463 extern void yfs_fs_extend_lock(struct afs_operation *);
1464 extern void yfs_fs_release_lock(struct afs_operation *);
1465 extern void yfs_fs_fetch_status(struct afs_operation *);
1466 extern void yfs_fs_inline_bulk_status(struct afs_operation *);
1469 struct afs_acl *acl; /* Dir/file/symlink ACL */
1470 struct afs_acl *vol_acl; /* Whole volume ACL */
1471 u32 inherit_flag; /* True if ACL is inherited from parent dir */
1472 u32 num_cleaned; /* Number of ACEs removed due to subject removal */
1474 #define YFS_ACL_WANT_ACL 0x01 /* Set if caller wants ->acl */
1475 #define YFS_ACL_WANT_VOL_ACL 0x02 /* Set if caller wants ->vol_acl */
1478 extern void yfs_free_opaque_acl(struct yfs_acl *);
1479 extern void yfs_fs_fetch_opaque_acl(struct afs_operation *);
1480 extern void yfs_fs_store_opaque_acl2(struct afs_operation *);
1483 * Miscellaneous inline functions.
1485 static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
1487 return container_of(inode, struct afs_vnode, vfs_inode);
1490 static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
1492 return &vnode->vfs_inode;
1496 * Note that a dentry got changed. We need to set d_fsdata to the data version
1497 * number derived from the result of the operation. It doesn't matter if
1498 * d_fsdata goes backwards as we'll just revalidate.
1500 static inline void afs_update_dentry_version(struct afs_operation *op,
1501 struct afs_vnode_param *dir_vp,
1502 struct dentry *dentry)
1506 (void *)(unsigned long)dir_vp->scb.status.data_version;
1510 * Check for a conflicting operation on a directory that we just unlinked from.
1511 * If someone managed to sneak a link or an unlink in on the file we just
1512 * unlinked, we won't be able to trust nlink on an AFS file (but not YFS).
1514 static inline void afs_check_dir_conflict(struct afs_operation *op,
1515 struct afs_vnode_param *dvp)
1517 if (dvp->dv_before + dvp->dv_delta != dvp->scb.status.data_version)
1518 op->flags |= AFS_OPERATION_DIR_CONFLICT;
1521 static inline int afs_io_error(struct afs_call *call, enum afs_io_error where)
1523 trace_afs_io_error(call->debug_id, -EIO, where);
1527 static inline int afs_bad(struct afs_vnode *vnode, enum afs_file_error where)
1529 trace_afs_file_error(vnode, -EIO, where);
1533 /*****************************************************************************/
1537 extern unsigned afs_debug;
1539 #define dbgprintk(FMT,...) \
1540 printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1542 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1543 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1544 #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
1547 #if defined(__KDEBUG)
1548 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1549 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1550 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1552 #elif defined(CONFIG_AFS_DEBUG)
1553 #define AFS_DEBUG_KENTER 0x01
1554 #define AFS_DEBUG_KLEAVE 0x02
1555 #define AFS_DEBUG_KDEBUG 0x04
1557 #define _enter(FMT,...) \
1559 if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
1560 kenter(FMT,##__VA_ARGS__); \
1563 #define _leave(FMT,...) \
1565 if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
1566 kleave(FMT,##__VA_ARGS__); \
1569 #define _debug(FMT,...) \
1571 if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
1572 kdebug(FMT,##__VA_ARGS__); \
1576 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1577 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1578 #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__)
1582 * debug assertion checking
1584 #if 1 // defined(__KDEBUGALL)
1588 if (unlikely(!(X))) { \
1589 printk(KERN_ERR "\n"); \
1590 printk(KERN_ERR "AFS: Assertion failed\n"); \
1595 #define ASSERTCMP(X, OP, Y) \
1597 if (unlikely(!((X) OP (Y)))) { \
1598 printk(KERN_ERR "\n"); \
1599 printk(KERN_ERR "AFS: Assertion failed\n"); \
1600 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1601 (unsigned long)(X), (unsigned long)(Y)); \
1602 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1603 (unsigned long)(X), (unsigned long)(Y)); \
1608 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1610 if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \
1611 printk(KERN_ERR "\n"); \
1612 printk(KERN_ERR "AFS: Assertion failed\n"); \
1613 printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \
1614 (unsigned long)(L), (unsigned long)(N), \
1615 (unsigned long)(H)); \
1616 printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
1617 (unsigned long)(L), (unsigned long)(N), \
1618 (unsigned long)(H)); \
1623 #define ASSERTIF(C, X) \
1625 if (unlikely((C) && !(X))) { \
1626 printk(KERN_ERR "\n"); \
1627 printk(KERN_ERR "AFS: Assertion failed\n"); \
1632 #define ASSERTIFCMP(C, X, OP, Y) \
1634 if (unlikely((C) && !((X) OP (Y)))) { \
1635 printk(KERN_ERR "\n"); \
1636 printk(KERN_ERR "AFS: Assertion failed\n"); \
1637 printk(KERN_ERR "%lu " #OP " %lu is false\n", \
1638 (unsigned long)(X), (unsigned long)(Y)); \
1639 printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
1640 (unsigned long)(X), (unsigned long)(Y)); \
1651 #define ASSERTCMP(X, OP, Y) \
1655 #define ASSERTRANGE(L, OP1, N, OP2, H) \
1659 #define ASSERTIF(C, X) \
1663 #define ASSERTIFCMP(C, X, OP, Y) \
1667 #endif /* __KDEBUGALL */