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/* AFS client file system
*
* Copyright (C) 2002,5 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.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/completion.h>
#include <linux/sched.h>
#include <linux/random.h>
#define CREATE_TRACE_POINTS
#include "internal.h"
MODULE_DESCRIPTION("AFS Client File System");
MODULE_AUTHOR("Red Hat, Inc.");
MODULE_LICENSE("GPL");
unsigned afs_debug;
module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(debug, "AFS debugging mask");
static char *rootcell;
module_param(rootcell, charp, 0);
MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
struct uuid_v1 afs_uuid;
struct workqueue_struct *afs_wq;
/*
* get a client UUID
*/
static int __init afs_get_client_UUID(void)
{
struct timespec ts;
u64 uuidtime;
u16 clockseq, hi_v;
int ret;
/* read the MAC address of one of the external interfaces and construct
* a UUID from it */
ret = afs_get_MAC_address(afs_uuid.node, sizeof(afs_uuid.node));
if (ret < 0)
return ret;
getnstimeofday(&ts);
uuidtime = (u64) ts.tv_sec * 1000 * 1000 * 10;
uuidtime += ts.tv_nsec / 100;
uuidtime += UUID_TO_UNIX_TIME;
afs_uuid.time_low = htonl(uuidtime);
afs_uuid.time_mid = htons(uuidtime >> 32);
hi_v = (uuidtime >> 48) & UUID_TIMEHI_MASK;
hi_v |= UUID_VERSION_TIME;
afs_uuid.time_hi_and_version = htons(hi_v);
get_random_bytes(&clockseq, 2);
afs_uuid.clock_seq_low = clockseq;
afs_uuid.clock_seq_hi_and_reserved =
(clockseq >> 8) & UUID_CLOCKHI_MASK;
afs_uuid.clock_seq_hi_and_reserved |= UUID_VARIANT_STD;
_debug("AFS UUID: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
ntohl(afs_uuid.time_low),
ntohs(afs_uuid.time_mid),
ntohs(afs_uuid.time_hi_and_version),
afs_uuid.clock_seq_hi_and_reserved,
afs_uuid.clock_seq_low,
afs_uuid.node[0], afs_uuid.node[1], afs_uuid.node[2],
afs_uuid.node[3], afs_uuid.node[4], afs_uuid.node[5]);
return 0;
}
/*
* initialise the AFS client FS module
*/
static int __init afs_init(void)
{
int ret;
printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
ret = afs_get_client_UUID();
if (ret < 0)
return ret;
/* create workqueue */
ret = -ENOMEM;
afs_wq = alloc_workqueue("afs", 0, 0);
if (!afs_wq)
return ret;
/* register the /proc stuff */
ret = afs_proc_init();
if (ret < 0)
goto error_proc;
#ifdef CONFIG_AFS_FSCACHE
/* we want to be able to cache */
ret = fscache_register_netfs(&afs_cache_netfs);
if (ret < 0)
goto error_cache;
#endif
/* initialise the cell DB */
ret = afs_cell_init(rootcell);
if (ret < 0)
goto error_cell_init;
/* initialise the VL update process */
ret = afs_vlocation_update_init();
if (ret < 0)
goto error_vl_update_init;
/* initialise the callback update process */
ret = afs_callback_update_init();
if (ret < 0)
goto error_callback_update_init;
/* create the RxRPC transport */
ret = afs_open_socket();
if (ret < 0)
goto error_open_socket;
/* register the filesystems */
ret = afs_fs_init();
if (ret < 0)
goto error_fs;
return ret;
error_fs:
afs_close_socket();
error_open_socket:
afs_callback_update_kill();
error_callback_update_init:
afs_vlocation_purge();
error_vl_update_init:
afs_cell_purge();
error_cell_init:
#ifdef CONFIG_AFS_FSCACHE
fscache_unregister_netfs(&afs_cache_netfs);
error_cache:
#endif
afs_proc_cleanup();
error_proc:
destroy_workqueue(afs_wq);
rcu_barrier();
printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
return ret;
}
/* XXX late_initcall is kludgy, but the only alternative seems to create
* a transport upon the first mount, which is worse. Or is it?
*/
late_initcall(afs_init); /* must be called after net/ to create socket */
/*
* clean up on module removal
*/
static void __exit afs_exit(void)
{
printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
afs_fs_exit();
afs_kill_lock_manager();
afs_close_socket();
afs_purge_servers();
afs_callback_update_kill();
afs_vlocation_purge();
destroy_workqueue(afs_wq);
afs_cell_purge();
#ifdef CONFIG_AFS_FSCACHE
fscache_unregister_netfs(&afs_cache_netfs);
#endif
afs_proc_cleanup();
rcu_barrier();
}
module_exit(afs_exit);
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