/* internal AFS stuff
*
- * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* 2 of the License, or (at your option) any later version.
*/
-#ifndef AFS_INTERNAL_H
-#define AFS_INTERNAL_H
-
#include <linux/compiler.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
+#include <linux/skbuff.h>
+#include <linux/rxrpc.h>
+#include <linux/key.h>
+#include <linux/workqueue.h>
+#include <linux/sched.h>
+#include <linux/fscache.h>
+#include <linux/backing-dev.h>
+
+#include "afs.h"
+#include "afs_vl.h"
+
+#define AFS_CELL_MAX_ADDRS 15
+
+struct pagevec;
+struct afs_call;
+
+typedef enum {
+ AFS_VL_NEW, /* new, uninitialised record */
+ AFS_VL_CREATING, /* creating record */
+ AFS_VL_VALID, /* record is pending */
+ AFS_VL_NO_VOLUME, /* no such volume available */
+ AFS_VL_UPDATING, /* update in progress */
+ AFS_VL_VOLUME_DELETED, /* volume was deleted */
+ AFS_VL_UNCERTAIN, /* uncertain state (update failed) */
+} __attribute__((packed)) afs_vlocation_state_t;
+
+struct afs_mount_params {
+ bool rwpath; /* T if the parent should be considered R/W */
+ bool force; /* T to force cell type */
+ afs_voltype_t type; /* type of volume requested */
+ int volnamesz; /* size of volume name */
+ const char *volname; /* name of volume to mount */
+ struct afs_cell *cell; /* cell in which to find volume */
+ struct afs_volume *volume; /* volume record */
+ struct key *key; /* key to use for secure mounting */
+};
/*
- * debug tracing
+ * definition of how to wait for the completion of an operation
*/
-#define kenter(FMT, a...) printk("==> %s("FMT")\n",__FUNCTION__ , ## a)
-#define kleave(FMT, a...) printk("<== %s()"FMT"\n",__FUNCTION__ , ## a)
-#define kdebug(FMT, a...) printk(FMT"\n" , ## a)
-#define kproto(FMT, a...) printk("### "FMT"\n" , ## a)
-#define knet(FMT, a...) printk(FMT"\n" , ## a)
-
-#ifdef __KDEBUG
-#define _enter(FMT, a...) kenter(FMT , ## a)
-#define _leave(FMT, a...) kleave(FMT , ## a)
-#define _debug(FMT, a...) kdebug(FMT , ## a)
-#define _proto(FMT, a...) kproto(FMT , ## a)
-#define _net(FMT, a...) knet(FMT , ## a)
-#else
-#define _enter(FMT, a...) do { } while(0)
-#define _leave(FMT, a...) do { } while(0)
-#define _debug(FMT, a...) do { } while(0)
-#define _proto(FMT, a...) do { } while(0)
-#define _net(FMT, a...) do { } while(0)
-#endif
+struct afs_wait_mode {
+ /* RxRPC received message notification */
+ void (*rx_wakeup)(struct afs_call *call);
-static inline void afs_discard_my_signals(void)
-{
- while (signal_pending(current)) {
- siginfo_t sinfo;
+ /* synchronous call waiter and call dispatched notification */
+ int (*wait)(struct afs_call *call);
+
+ /* asynchronous call completion */
+ void (*async_complete)(void *reply, int error);
+};
+
+extern const struct afs_wait_mode afs_sync_call;
+extern const struct afs_wait_mode afs_async_call;
+
+/*
+ * a record of an in-progress RxRPC call
+ */
+struct afs_call {
+ const struct afs_call_type *type; /* type of call */
+ const struct afs_wait_mode *wait_mode; /* completion wait mode */
+ wait_queue_head_t waitq; /* processes awaiting completion */
+ struct work_struct async_work; /* asynchronous work processor */
+ struct work_struct work; /* actual work processor */
+ struct sk_buff_head rx_queue; /* received packets */
+ struct rxrpc_call *rxcall; /* RxRPC call handle */
+ struct key *key; /* security for this call */
+ struct afs_server *server; /* server affected by incoming CM call */
+ void *request; /* request data (first part) */
+ struct address_space *mapping; /* page set */
+ struct afs_writeback *wb; /* writeback being performed */
+ void *buffer; /* reply receive buffer */
+ void *reply; /* reply buffer (first part) */
+ void *reply2; /* reply buffer (second part) */
+ void *reply3; /* reply buffer (third part) */
+ void *reply4; /* reply buffer (fourth part) */
+ pgoff_t first; /* first page in mapping to deal with */
+ pgoff_t last; /* last page in mapping to deal with */
+ enum { /* call state */
+ AFS_CALL_REQUESTING, /* request is being sent for outgoing call */
+ AFS_CALL_AWAIT_REPLY, /* awaiting reply to outgoing call */
+ AFS_CALL_AWAIT_OP_ID, /* awaiting op ID on incoming call */
+ AFS_CALL_AWAIT_REQUEST, /* awaiting request data on incoming call */
+ AFS_CALL_REPLYING, /* replying to incoming call */
+ AFS_CALL_AWAIT_ACK, /* awaiting final ACK of incoming call */
+ AFS_CALL_COMPLETE, /* successfully completed */
+ AFS_CALL_BUSY, /* server was busy */
+ AFS_CALL_ABORTED, /* call was aborted */
+ AFS_CALL_ERROR, /* call failed due to error */
+ } state;
+ int error; /* error code */
+ unsigned request_size; /* size of request data */
+ unsigned reply_max; /* maximum size of reply */
+ unsigned reply_size; /* current size of reply */
+ unsigned first_offset; /* offset into mapping[first] */
+ unsigned last_to; /* amount of mapping[last] */
+ unsigned short offset; /* offset into received data store */
+ unsigned char unmarshall; /* unmarshalling phase */
+ bool incoming; /* T if incoming call */
+ bool send_pages; /* T if data from mapping should be sent */
+ u16 service_id; /* RxRPC service ID to call */
+ __be16 port; /* target UDP port */
+ __be32 operation_ID; /* operation ID for an incoming call */
+ u32 count; /* count for use in unmarshalling */
+ __be32 tmp; /* place to extract temporary data */
+ afs_dataversion_t store_version; /* updated version expected from store */
+};
+
+struct afs_call_type {
+ const char *name;
+
+ /* deliver request or reply data to an call
+ * - returning an error will cause the call to be aborted
+ */
+ int (*deliver)(struct afs_call *call, struct sk_buff *skb,
+ bool last);
+
+ /* map an abort code to an error number */
+ int (*abort_to_error)(u32 abort_code);
+
+ /* clean up a call */
+ void (*destructor)(struct afs_call *call);
+};
+
+/*
+ * record of an outstanding writeback on a vnode
+ */
+struct afs_writeback {
+ struct list_head link; /* link in vnode->writebacks */
+ struct work_struct writer; /* work item to perform the writeback */
+ struct afs_vnode *vnode; /* vnode to which this write applies */
+ struct key *key; /* owner of this write */
+ wait_queue_head_t waitq; /* completion and ready wait queue */
+ pgoff_t first; /* first page in batch */
+ pgoff_t point; /* last page in current store op */
+ pgoff_t last; /* last page in batch (inclusive) */
+ unsigned offset_first; /* offset into first page of start of write */
+ unsigned to_last; /* offset into last page of end of write */
+ int num_conflicts; /* count of conflicting writes in list */
+ int usage;
+ bool conflicts; /* T if has dependent conflicts */
+ enum {
+ AFS_WBACK_SYNCING, /* synchronisation being performed */
+ AFS_WBACK_PENDING, /* write pending */
+ AFS_WBACK_CONFLICTING, /* conflicting writes posted */
+ AFS_WBACK_WRITING, /* writing back */
+ AFS_WBACK_COMPLETE /* the writeback record has been unlinked */
+ } state __attribute__((packed));
+};
+
+/*
+ * AFS superblock private data
+ * - there's one superblock per volume
+ */
+struct afs_super_info {
+ struct afs_volume *volume; /* volume record */
+ char rwparent; /* T if parent is R/W AFS volume */
+};
- spin_lock_irq(¤t->sighand->siglock);
- dequeue_signal(current,¤t->blocked, &sinfo);
- spin_unlock_irq(¤t->sighand->siglock);
- }
+static inline struct afs_super_info *AFS_FS_S(struct super_block *sb)
+{
+ return sb->s_fs_info;
}
+extern struct file_system_type afs_fs_type;
+
+/*
+ * entry in the cached cell catalogue
+ */
+struct afs_cache_cell {
+ char name[AFS_MAXCELLNAME]; /* cell name (padded with NULs) */
+ struct in_addr vl_servers[15]; /* cached cell VL servers */
+};
+
+/*
+ * AFS cell record
+ */
+struct afs_cell {
+ atomic_t usage;
+ struct list_head link; /* main cell list link */
+ struct key *anonymous_key; /* anonymous user key for this cell */
+ struct list_head proc_link; /* /proc cell list link */
+ struct proc_dir_entry *proc_dir; /* /proc dir for this cell */
+#ifdef CONFIG_AFS_FSCACHE
+ struct fscache_cookie *cache; /* caching cookie */
+#endif
+
+ /* server record management */
+ rwlock_t servers_lock; /* active server list lock */
+ struct list_head servers; /* active server list */
+
+ /* volume location record management */
+ struct rw_semaphore vl_sem; /* volume management serialisation semaphore */
+ struct list_head vl_list; /* cell's active VL record list */
+ spinlock_t vl_lock; /* vl_list lock */
+ unsigned short vl_naddrs; /* number of VL servers in addr list */
+ unsigned short vl_curr_svix; /* current server index */
+ struct in_addr vl_addrs[AFS_CELL_MAX_ADDRS]; /* cell VL server addresses */
+
+ char name[0]; /* cell name - must go last */
+};
+
+/*
+ * entry in the cached volume location catalogue
+ */
+struct afs_cache_vlocation {
+ /* volume name (lowercase, padded with NULs) */
+ uint8_t name[AFS_MAXVOLNAME + 1];
+
+ uint8_t nservers; /* number of entries used in servers[] */
+ uint8_t vidmask; /* voltype mask for vid[] */
+ uint8_t srvtmask[8]; /* voltype masks for servers[] */
+#define AFS_VOL_VTM_RW 0x01 /* R/W version of the volume is available (on this server) */
+#define AFS_VOL_VTM_RO 0x02 /* R/O version of the volume is available (on this server) */
+#define AFS_VOL_VTM_BAK 0x04 /* backup version of the volume is available (on this server) */
+
+ afs_volid_t vid[3]; /* volume IDs for R/W, R/O and Bak volumes */
+ struct in_addr servers[8]; /* fileserver addresses */
+ time_t rtime; /* last retrieval time */
+};
+
+/*
+ * volume -> vnode hash table entry
+ */
+struct afs_cache_vhash {
+ afs_voltype_t vtype; /* which volume variation */
+ uint8_t hash_bucket; /* which hash bucket this represents */
+} __attribute__((packed));
+
+/*
+ * AFS volume location record
+ */
+struct afs_vlocation {
+ atomic_t usage;
+ time_t time_of_death; /* time at which put reduced usage to 0 */
+ struct list_head link; /* link in cell volume location list */
+ struct list_head grave; /* link in master graveyard list */
+ struct list_head update; /* link in master update list */
+ struct afs_cell *cell; /* cell to which volume belongs */
+#ifdef CONFIG_AFS_FSCACHE
+ struct fscache_cookie *cache; /* caching cookie */
+#endif
+ struct afs_cache_vlocation vldb; /* volume information DB record */
+ struct afs_volume *vols[3]; /* volume access record pointer (index by type) */
+ wait_queue_head_t waitq; /* status change waitqueue */
+ time_t update_at; /* time at which record should be updated */
+ spinlock_t lock; /* access lock */
+ afs_vlocation_state_t state; /* volume location state */
+ unsigned short upd_rej_cnt; /* ENOMEDIUM count during update */
+ unsigned short upd_busy_cnt; /* EBUSY count during update */
+ bool valid; /* T if valid */
+};
+
+/*
+ * AFS fileserver record
+ */
+struct afs_server {
+ atomic_t usage;
+ time_t time_of_death; /* time at which put reduced usage to 0 */
+ struct in_addr addr; /* server address */
+ struct afs_cell *cell; /* cell in which server resides */
+ struct list_head link; /* link in cell's server list */
+ struct list_head grave; /* link in master graveyard list */
+ struct rb_node master_rb; /* link in master by-addr tree */
+ struct rw_semaphore sem; /* access lock */
+
+ /* file service access */
+ struct rb_root fs_vnodes; /* vnodes backed by this server (ordered by FID) */
+ unsigned long fs_act_jif; /* time at which last activity occurred */
+ unsigned long fs_dead_jif; /* time at which no longer to be considered dead */
+ spinlock_t fs_lock; /* access lock */
+ int fs_state; /* 0 or reason FS currently marked dead (-errno) */
+
+ /* callback promise management */
+ struct rb_root cb_promises; /* vnode expiration list (ordered earliest first) */
+ struct delayed_work cb_updater; /* callback updater */
+ struct delayed_work cb_break_work; /* collected break dispatcher */
+ wait_queue_head_t cb_break_waitq; /* space available in cb_break waitqueue */
+ spinlock_t cb_lock; /* access lock */
+ struct afs_callback cb_break[64]; /* ring of callbacks awaiting breaking */
+ atomic_t cb_break_n; /* number of pending breaks */
+ u8 cb_break_head; /* head of callback breaking ring */
+ u8 cb_break_tail; /* tail of callback breaking ring */
+};
+
+/*
+ * AFS volume access record
+ */
+struct afs_volume {
+ atomic_t usage;
+ struct afs_cell *cell; /* cell to which belongs (unrefd ptr) */
+ struct afs_vlocation *vlocation; /* volume location */
+#ifdef CONFIG_AFS_FSCACHE
+ struct fscache_cookie *cache; /* caching cookie */
+#endif
+ afs_volid_t vid; /* volume ID */
+ afs_voltype_t type; /* type of volume */
+ char type_force; /* force volume type (suppress R/O -> R/W) */
+ unsigned short nservers; /* number of server slots filled */
+ unsigned short rjservers; /* number of servers discarded due to -ENOMEDIUM */
+ struct afs_server *servers[8]; /* servers on which volume resides (ordered) */
+ struct rw_semaphore server_sem; /* lock for accessing current server */
+ struct backing_dev_info bdi;
+};
+
+/*
+ * vnode catalogue entry
+ */
+struct afs_cache_vnode {
+ afs_vnodeid_t vnode_id; /* vnode ID */
+ unsigned vnode_unique; /* vnode ID uniquifier */
+ afs_dataversion_t data_version; /* data version */
+};
+
+/*
+ * AFS inode private data
+ */
+struct afs_vnode {
+ struct inode vfs_inode; /* the VFS's inode record */
+
+ struct afs_volume *volume; /* volume on which vnode resides */
+ struct afs_server *server; /* server currently supplying this file */
+ struct afs_fid fid; /* the file identifier for this inode */
+ struct afs_file_status status; /* AFS status info for this file */
+#ifdef CONFIG_AFS_FSCACHE
+ struct fscache_cookie *cache; /* caching cookie */
+#endif
+ struct afs_permits *permits; /* cache of permits so far obtained */
+ struct mutex permits_lock; /* lock for altering permits list */
+ struct mutex validate_lock; /* lock for validating this vnode */
+ wait_queue_head_t update_waitq; /* status fetch waitqueue */
+ int update_cnt; /* number of outstanding ops that will update the
+ * status */
+ spinlock_t writeback_lock; /* lock for writebacks */
+ spinlock_t lock; /* waitqueue/flags lock */
+ unsigned long flags;
+#define AFS_VNODE_CB_BROKEN 0 /* set if vnode's callback was broken */
+#define AFS_VNODE_UNSET 1 /* set if vnode attributes not yet set */
+#define AFS_VNODE_MODIFIED 2 /* set if vnode's data modified */
+#define AFS_VNODE_ZAP_DATA 3 /* set if vnode's data should be invalidated */
+#define AFS_VNODE_DELETED 4 /* set if vnode deleted on server */
+#define AFS_VNODE_MOUNTPOINT 5 /* set if vnode is a mountpoint symlink */
+#define AFS_VNODE_LOCKING 6 /* set if waiting for lock on vnode */
+#define AFS_VNODE_READLOCKED 7 /* set if vnode is read-locked on the server */
+#define AFS_VNODE_WRITELOCKED 8 /* set if vnode is write-locked on the server */
+#define AFS_VNODE_UNLOCKING 9 /* set if vnode is being unlocked on the server */
+
+ long acl_order; /* ACL check count (callback break count) */
+
+ struct list_head writebacks; /* alterations in pagecache that need writing */
+ struct list_head pending_locks; /* locks waiting to be granted */
+ struct list_head granted_locks; /* locks granted on this file */
+ struct delayed_work lock_work; /* work to be done in locking */
+ struct key *unlock_key; /* key to be used in unlocking */
+
+ /* outstanding callback notification on this file */
+ struct rb_node server_rb; /* link in server->fs_vnodes */
+ struct rb_node cb_promise; /* link in server->cb_promises */
+ struct work_struct cb_broken_work; /* work to be done on callback break */
+ time_t cb_expires; /* time at which callback expires */
+ time_t cb_expires_at; /* time used to order cb_promise */
+ unsigned cb_version; /* callback version */
+ unsigned cb_expiry; /* callback expiry time */
+ afs_callback_type_t cb_type; /* type of callback */
+ bool cb_promised; /* true if promise still holds */
+};
+
+/*
+ * cached security record for one user's attempt to access a vnode
+ */
+struct afs_permit {
+ struct key *key; /* RxRPC ticket holding a security context */
+ afs_access_t access_mask; /* access mask for this key */
+};
+
+/*
+ * cache of security records from attempts to access a vnode
+ */
+struct afs_permits {
+ struct rcu_head rcu; /* disposal procedure */
+ int count; /* number of records */
+ struct afs_permit permits[0]; /* the permits so far examined */
+};
+
+/*
+ * record of one of a system's set of network interfaces
+ */
+struct afs_interface {
+ struct in_addr address; /* IPv4 address bound to interface */
+ struct in_addr netmask; /* netmask applied to address */
+ unsigned mtu; /* MTU of interface */
+};
+
+/*
+ * UUID definition [internet draft]
+ * - the timestamp is a 60-bit value, split 32/16/12, and goes in 100ns
+ * increments since midnight 15th October 1582
+ * - add AFS_UUID_TO_UNIX_TIME to convert unix time in 100ns units to UUID
+ * time
+ * - the clock sequence is a 14-bit counter to avoid duplicate times
+ */
+struct afs_uuid {
+ u32 time_low; /* low part of timestamp */
+ u16 time_mid; /* mid part of timestamp */
+ u16 time_hi_and_version; /* high part of timestamp and version */
+#define AFS_UUID_TO_UNIX_TIME 0x01b21dd213814000ULL
+#define AFS_UUID_TIMEHI_MASK 0x0fff
+#define AFS_UUID_VERSION_TIME 0x1000 /* time-based UUID */
+#define AFS_UUID_VERSION_NAME 0x3000 /* name-based UUID */
+#define AFS_UUID_VERSION_RANDOM 0x4000 /* (pseudo-)random generated UUID */
+ u8 clock_seq_hi_and_reserved; /* clock seq hi and variant */
+#define AFS_UUID_CLOCKHI_MASK 0x3f
+#define AFS_UUID_VARIANT_STD 0x80
+ u8 clock_seq_low; /* clock seq low */
+ u8 node[6]; /* spatially unique node ID (MAC addr) */
+};
+
+/*****************************************************************************/
+/*
+ * cache.c
+ */
+#ifdef CONFIG_AFS_FSCACHE
+extern struct fscache_netfs afs_cache_netfs;
+extern struct fscache_cookie_def afs_cell_cache_index_def;
+extern struct fscache_cookie_def afs_vlocation_cache_index_def;
+extern struct fscache_cookie_def afs_volume_cache_index_def;
+extern struct fscache_cookie_def afs_vnode_cache_index_def;
+#else
+#define afs_cell_cache_index_def (*(struct fscache_cookie_def *) NULL)
+#define afs_vlocation_cache_index_def (*(struct fscache_cookie_def *) NULL)
+#define afs_volume_cache_index_def (*(struct fscache_cookie_def *) NULL)
+#define afs_vnode_cache_index_def (*(struct fscache_cookie_def *) NULL)
+#endif
+
+/*
+ * callback.c
+ */
+extern void afs_init_callback_state(struct afs_server *);
+extern void afs_broken_callback_work(struct work_struct *);
+extern void afs_break_callbacks(struct afs_server *, size_t,
+ struct afs_callback[]);
+extern void afs_discard_callback_on_delete(struct afs_vnode *);
+extern void afs_give_up_callback(struct afs_vnode *);
+extern void afs_dispatch_give_up_callbacks(struct work_struct *);
+extern void afs_flush_callback_breaks(struct afs_server *);
+extern int __init afs_callback_update_init(void);
+extern void afs_callback_update_kill(void);
+
/*
* cell.c
*/
extern struct rw_semaphore afs_proc_cells_sem;
extern struct list_head afs_proc_cells;
-#ifdef AFS_CACHING_SUPPORT
-extern struct cachefs_index_def afs_cache_cell_index_def;
-#endif
+
+#define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0)
+extern int afs_cell_init(char *);
+extern struct afs_cell *afs_cell_create(const char *, char *);
+extern struct afs_cell *afs_cell_lookup(const char *, unsigned);
+extern struct afs_cell *afs_grab_cell(struct afs_cell *);
+extern void afs_put_cell(struct afs_cell *);
+extern void afs_cell_purge(void);
+
+/*
+ * cmservice.c
+ */
+extern bool afs_cm_incoming_call(struct afs_call *);
/*
* dir.c
*/
extern const struct address_space_operations afs_fs_aops;
extern const struct inode_operations afs_file_inode_operations;
+extern const struct file_operations afs_file_operations;
-#ifdef AFS_CACHING_SUPPORT
-extern int afs_cache_get_page_cookie(struct page *, struct cachefs_page **);
-#endif
+extern int afs_open(struct inode *, struct file *);
+extern int afs_release(struct inode *, struct file *);
+
+/*
+ * flock.c
+ */
+extern void __exit afs_kill_lock_manager(void);
+extern void afs_lock_work(struct work_struct *);
+extern void afs_lock_may_be_available(struct afs_vnode *);
+extern int afs_lock(struct file *, int, struct file_lock *);
+extern int afs_flock(struct file *, int, struct file_lock *);
+
+/*
+ * fsclient.c
+ */
+extern int afs_fs_fetch_file_status(struct afs_server *, struct key *,
+ struct afs_vnode *, struct afs_volsync *,
+ const struct afs_wait_mode *);
+extern int afs_fs_give_up_callbacks(struct afs_server *,
+ const struct afs_wait_mode *);
+extern int afs_fs_fetch_data(struct afs_server *, struct key *,
+ struct afs_vnode *, off_t, size_t, struct page *,
+ const struct afs_wait_mode *);
+extern int afs_fs_create(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *, umode_t,
+ struct afs_fid *, struct afs_file_status *,
+ struct afs_callback *,
+ const struct afs_wait_mode *);
+extern int afs_fs_remove(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *, bool,
+ const struct afs_wait_mode *);
+extern int afs_fs_link(struct afs_server *, struct key *, struct afs_vnode *,
+ struct afs_vnode *, const char *,
+ const struct afs_wait_mode *);
+extern int afs_fs_symlink(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *, const char *,
+ struct afs_fid *, struct afs_file_status *,
+ const struct afs_wait_mode *);
+extern int afs_fs_rename(struct afs_server *, struct key *,
+ struct afs_vnode *, const char *,
+ struct afs_vnode *, const char *,
+ const struct afs_wait_mode *);
+extern int afs_fs_store_data(struct afs_server *, struct afs_writeback *,
+ pgoff_t, pgoff_t, unsigned, unsigned,
+ const struct afs_wait_mode *);
+extern int afs_fs_setattr(struct afs_server *, struct key *,
+ struct afs_vnode *, struct iattr *,
+ const struct afs_wait_mode *);
+extern int afs_fs_get_volume_status(struct afs_server *, struct key *,
+ struct afs_vnode *,
+ struct afs_volume_status *,
+ const struct afs_wait_mode *);
+extern int afs_fs_set_lock(struct afs_server *, struct key *,
+ struct afs_vnode *, afs_lock_type_t,
+ const struct afs_wait_mode *);
+extern int afs_fs_extend_lock(struct afs_server *, struct key *,
+ struct afs_vnode *,
+ const struct afs_wait_mode *);
+extern int afs_fs_release_lock(struct afs_server *, struct key *,
+ struct afs_vnode *,
+ const struct afs_wait_mode *);
/*
* inode.c
*/
-extern int afs_iget(struct super_block *, struct afs_fid *, struct inode **);
-extern int afs_inode_getattr(struct vfsmount *, struct dentry *,
- struct kstat *);
+extern struct inode *afs_iget(struct super_block *, struct key *,
+ struct afs_fid *, struct afs_file_status *,
+ struct afs_callback *);
+extern void afs_zap_data(struct afs_vnode *);
+extern int afs_validate(struct afs_vnode *, struct key *);
+extern int afs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
+extern int afs_setattr(struct dentry *, struct iattr *);
extern void afs_clear_inode(struct inode *);
/*
* main.c
*/
-#ifdef AFS_CACHING_SUPPORT
-extern struct cachefs_netfs afs_cache_netfs;
-#endif
+extern struct afs_uuid afs_uuid;
+
+/*
+ * misc.c
+ */
+extern int afs_abort_to_error(u32);
/*
* mntpt.c
*/
extern const struct inode_operations afs_mntpt_inode_operations;
extern const struct file_operations afs_mntpt_file_operations;
-extern struct afs_timer afs_mntpt_expiry_timer;
-extern struct afs_timer_ops afs_mntpt_expiry_timer_ops;
-extern unsigned long afs_mntpt_expiry_timeout;
-extern int afs_mntpt_check_symlink(struct afs_vnode *);
+extern int afs_mntpt_check_symlink(struct afs_vnode *, struct key *);
+extern void afs_mntpt_kill_timer(void);
+
+/*
+ * proc.c
+ */
+extern int afs_proc_init(void);
+extern void afs_proc_cleanup(void);
+extern int afs_proc_cell_setup(struct afs_cell *);
+extern void afs_proc_cell_remove(struct afs_cell *);
+
+/*
+ * rxrpc.c
+ */
+extern int afs_open_socket(void);
+extern void afs_close_socket(void);
+extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t,
+ const struct afs_wait_mode *);
+extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *,
+ size_t, size_t);
+extern void afs_flat_call_destructor(struct afs_call *);
+extern void afs_transfer_reply(struct afs_call *, struct sk_buff *);
+extern void afs_send_empty_reply(struct afs_call *);
+extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
+extern int afs_extract_data(struct afs_call *, struct sk_buff *, bool, void *,
+ size_t);
+
+/*
+ * security.c
+ */
+extern void afs_clear_permits(struct afs_vnode *);
+extern void afs_cache_permit(struct afs_vnode *, struct key *, long);
+extern void afs_zap_permits(struct rcu_head *);
+extern struct key *afs_request_key(struct afs_cell *);
+extern int afs_permission(struct inode *, int);
+
+/*
+ * server.c
+ */
+extern spinlock_t afs_server_peer_lock;
+
+#define afs_get_server(S) \
+do { \
+ _debug("GET SERVER %d", atomic_read(&(S)->usage)); \
+ atomic_inc(&(S)->usage); \
+} while(0)
+
+extern struct afs_server *afs_lookup_server(struct afs_cell *,
+ const struct in_addr *);
+extern struct afs_server *afs_find_server(const struct in_addr *);
+extern void afs_put_server(struct afs_server *);
+extern void __exit afs_purge_servers(void);
/*
* super.c
extern int afs_fs_init(void);
extern void afs_fs_exit(void);
-#define AFS_CB_HASH_COUNT (PAGE_SIZE / sizeof(struct list_head))
+/*
+ * use-rtnetlink.c
+ */
+extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool);
+extern int afs_get_MAC_address(u8 *, size_t);
-extern struct list_head afs_cb_hash_tbl[];
-extern spinlock_t afs_cb_hash_lock;
+/*
+ * vlclient.c
+ */
+extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *,
+ const char *, struct afs_cache_vlocation *,
+ const struct afs_wait_mode *);
+extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *,
+ afs_volid_t, afs_voltype_t,
+ struct afs_cache_vlocation *,
+ const struct afs_wait_mode *);
+
+/*
+ * vlocation.c
+ */
+#define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0)
-#define afs_cb_hash(SRV, FID) \
- afs_cb_hash_tbl[((unsigned long)(SRV) + \
- (FID)->vid + (FID)->vnode + (FID)->unique) & \
- (AFS_CB_HASH_COUNT - 1)]
+extern int __init afs_vlocation_update_init(void);
+extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *,
+ struct key *,
+ const char *, size_t);
+extern void afs_put_vlocation(struct afs_vlocation *);
+extern void afs_vlocation_purge(void);
/*
- * proc.c
+ * vnode.c
*/
-extern int afs_proc_init(void);
-extern void afs_proc_cleanup(void);
-extern int afs_proc_cell_setup(struct afs_cell *);
-extern void afs_proc_cell_remove(struct afs_cell *);
+static inline struct afs_vnode *AFS_FS_I(struct inode *inode)
+{
+ return container_of(inode, struct afs_vnode, vfs_inode);
+}
+
+static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
+{
+ return &vnode->vfs_inode;
+}
+
+extern void afs_vnode_finalise_status_update(struct afs_vnode *,
+ struct afs_server *);
+extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *,
+ struct key *);
+extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *,
+ off_t, size_t, struct page *);
+extern int afs_vnode_create(struct afs_vnode *, struct key *, const char *,
+ umode_t, struct afs_fid *, struct afs_file_status *,
+ struct afs_callback *, struct afs_server **);
+extern int afs_vnode_remove(struct afs_vnode *, struct key *, const char *,
+ bool);
+extern int afs_vnode_link(struct afs_vnode *, struct afs_vnode *, struct key *,
+ const char *);
+extern int afs_vnode_symlink(struct afs_vnode *, struct key *, const char *,
+ const char *, struct afs_fid *,
+ struct afs_file_status *, struct afs_server **);
+extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *,
+ struct key *, const char *, const char *);
+extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t,
+ unsigned, unsigned);
+extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *);
+extern int afs_vnode_get_volume_status(struct afs_vnode *, struct key *,
+ struct afs_volume_status *);
+extern int afs_vnode_set_lock(struct afs_vnode *, struct key *,
+ afs_lock_type_t);
+extern int afs_vnode_extend_lock(struct afs_vnode *, struct key *);
+extern int afs_vnode_release_lock(struct afs_vnode *, struct key *);
+
+/*
+ * volume.c
+ */
+#define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0)
+
+extern void afs_put_volume(struct afs_volume *);
+extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *);
+extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *);
+extern int afs_volume_release_fileserver(struct afs_vnode *,
+ struct afs_server *, int);
+
+/*
+ * write.c
+ */
+extern int afs_set_page_dirty(struct page *);
+extern void afs_put_writeback(struct afs_writeback *);
+extern int afs_write_begin(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata);
+extern int afs_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *page, void *fsdata);
+extern int afs_writepage(struct page *, struct writeback_control *);
+extern int afs_writepages(struct address_space *, struct writeback_control *);
+extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *);
+extern ssize_t afs_file_write(struct kiocb *, const struct iovec *,
+ unsigned long, loff_t);
+extern int afs_writeback_all(struct afs_vnode *);
+extern int afs_fsync(struct file *, struct dentry *, int);
+
+
+/*****************************************************************************/
+/*
+ * debug tracing
+ */
+extern unsigned afs_debug;
+
+#define dbgprintk(FMT,...) \
+ printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
+
+/* make sure we maintain the format strings, even when debugging is disabled */
+static inline __attribute__((format(printf,1,2)))
+void _dbprintk(const char *fmt, ...)
+{
+}
+
+#define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
+#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
+#define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__)
+
+
+#if defined(__KDEBUG)
+#define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
+#define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
+#define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
+
+#elif defined(CONFIG_AFS_DEBUG)
+#define AFS_DEBUG_KENTER 0x01
+#define AFS_DEBUG_KLEAVE 0x02
+#define AFS_DEBUG_KDEBUG 0x04
+
+#define _enter(FMT,...) \
+do { \
+ if (unlikely(afs_debug & AFS_DEBUG_KENTER)) \
+ kenter(FMT,##__VA_ARGS__); \
+} while (0)
+
+#define _leave(FMT,...) \
+do { \
+ if (unlikely(afs_debug & AFS_DEBUG_KLEAVE)) \
+ kleave(FMT,##__VA_ARGS__); \
+} while (0)
+
+#define _debug(FMT,...) \
+do { \
+ if (unlikely(afs_debug & AFS_DEBUG_KDEBUG)) \
+ kdebug(FMT,##__VA_ARGS__); \
+} while (0)
+
+#else
+#define _enter(FMT,...) _dbprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
+#define _leave(FMT,...) _dbprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
+#define _debug(FMT,...) _dbprintk(" "FMT ,##__VA_ARGS__)
+#endif
+
+/*
+ * debug assertion checking
+ */
+#if 1 // defined(__KDEBUGALL)
+
+#define ASSERT(X) \
+do { \
+ if (unlikely(!(X))) { \
+ printk(KERN_ERR "\n"); \
+ printk(KERN_ERR "AFS: Assertion failed\n"); \
+ BUG(); \
+ } \
+} while(0)
+
+#define ASSERTCMP(X, OP, Y) \
+do { \
+ if (unlikely(!((X) OP (Y)))) { \
+ printk(KERN_ERR "\n"); \
+ printk(KERN_ERR "AFS: Assertion failed\n"); \
+ printk(KERN_ERR "%lu " #OP " %lu is false\n", \
+ (unsigned long)(X), (unsigned long)(Y)); \
+ printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
+ (unsigned long)(X), (unsigned long)(Y)); \
+ BUG(); \
+ } \
+} while(0)
+
+#define ASSERTRANGE(L, OP1, N, OP2, H) \
+do { \
+ if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) { \
+ printk(KERN_ERR "\n"); \
+ printk(KERN_ERR "AFS: Assertion failed\n"); \
+ printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n", \
+ (unsigned long)(L), (unsigned long)(N), \
+ (unsigned long)(H)); \
+ printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
+ (unsigned long)(L), (unsigned long)(N), \
+ (unsigned long)(H)); \
+ BUG(); \
+ } \
+} while(0)
+
+#define ASSERTIF(C, X) \
+do { \
+ if (unlikely((C) && !(X))) { \
+ printk(KERN_ERR "\n"); \
+ printk(KERN_ERR "AFS: Assertion failed\n"); \
+ BUG(); \
+ } \
+} while(0)
+
+#define ASSERTIFCMP(C, X, OP, Y) \
+do { \
+ if (unlikely((C) && !((X) OP (Y)))) { \
+ printk(KERN_ERR "\n"); \
+ printk(KERN_ERR "AFS: Assertion failed\n"); \
+ printk(KERN_ERR "%lu " #OP " %lu is false\n", \
+ (unsigned long)(X), (unsigned long)(Y)); \
+ printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \
+ (unsigned long)(X), (unsigned long)(Y)); \
+ BUG(); \
+ } \
+} while(0)
+
+#else
+
+#define ASSERT(X) \
+do { \
+} while(0)
+
+#define ASSERTCMP(X, OP, Y) \
+do { \
+} while(0)
+
+#define ASSERTRANGE(L, OP1, N, OP2, H) \
+do { \
+} while(0)
+
+#define ASSERTIF(C, X) \
+do { \
+} while(0)
+
+#define ASSERTIFCMP(C, X, OP, Y) \
+do { \
+} while(0)
-#endif /* AFS_INTERNAL_H */
+#endif /* __KDEBUGALL */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff