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/* AFS cell record
*
* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef AFS_CELL_H
#define AFS_CELL_H
#include "types.h"
#include "cache.h"
#define AFS_CELL_MAX_ADDRS 15
extern volatile int afs_cells_being_purged; /* T when cells are being purged by rmmod */
/*
* entry in the cached cell catalogue
*/
struct afs_cache_cell {
char name[64]; /* 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 list_head proc_link; /* /proc cell list link */
struct proc_dir_entry *proc_dir; /* /proc dir for this cell */
#ifdef AFS_CACHING_SUPPORT
struct cachefs_cookie *cache; /* caching cookie */
#endif
/* server record management */
rwlock_t sv_lock; /* active server list lock */
struct list_head sv_list; /* active server list */
struct list_head sv_graveyard; /* inactive server list */
spinlock_t sv_gylock; /* inactive server list lock */
/* volume location record management */
struct rw_semaphore vl_sem; /* volume management serialisation semaphore */
struct list_head vl_list; /* cell's active VL record list */
struct list_head vl_graveyard; /* cell's inactive VL record list */
spinlock_t vl_gylock; /* graveyard 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 */
};
extern int afs_cell_init(char *);
extern int afs_cell_create(const char *, char *, struct afs_cell **);
extern int afs_cell_lookup(const char *, unsigned, struct afs_cell **);
#define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0)
extern struct afs_cell *afs_get_cell_maybe(struct afs_cell **);
extern void afs_put_cell(struct afs_cell *);
extern void afs_cell_purge(void);
#endif /* AFS_CELL_H */
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