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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 workqueue_struct *afs_wq;
struct afs_net __afs_net;
/*
* Initialise an AFS network namespace record.
*/
static int __net_init afs_net_init(struct afs_net *net)
{
int ret;
net->live = true;
generate_random_uuid((unsigned char *)&net->uuid);
INIT_WORK(&net->charge_preallocation_work, afs_charge_preallocation);
mutex_init(&net->socket_mutex);
INIT_LIST_HEAD(&net->cells);
rwlock_init(&net->cells_lock);
init_rwsem(&net->cells_sem);
init_waitqueue_head(&net->cells_freeable_wq);
init_rwsem(&net->proc_cells_sem);
INIT_LIST_HEAD(&net->proc_cells);
INIT_LIST_HEAD(&net->vl_updates);
INIT_LIST_HEAD(&net->vl_graveyard);
INIT_DELAYED_WORK(&net->vl_reaper, afs_vlocation_reaper);
INIT_DELAYED_WORK(&net->vl_updater, afs_vlocation_updater);
spin_lock_init(&net->vl_updates_lock);
spin_lock_init(&net->vl_graveyard_lock);
net->servers = RB_ROOT;
rwlock_init(&net->servers_lock);
INIT_LIST_HEAD(&net->server_graveyard);
spin_lock_init(&net->server_graveyard_lock);
INIT_WORK(&net->server_reaper, afs_reap_server);
timer_setup(&net->server_timer, afs_server_timer, 0);
/* Register the /proc stuff */
ret = afs_proc_init(net);
if (ret < 0)
goto error_proc;
/* Initialise the cell DB */
ret = afs_cell_init(net, rootcell);
if (ret < 0)
goto error_cell_init;
/* Create the RxRPC transport */
ret = afs_open_socket(net);
if (ret < 0)
goto error_open_socket;
return 0;
error_open_socket:
afs_vlocation_purge(net);
afs_cell_purge(net);
error_cell_init:
afs_proc_cleanup(net);
error_proc:
return ret;
}
/*
* Clean up and destroy an AFS network namespace record.
*/
static void __net_exit afs_net_exit(struct afs_net *net)
{
net->live = false;
afs_purge_servers(net);
afs_vlocation_purge(net);
afs_cell_purge(net);
afs_close_socket(net);
afs_proc_cleanup(net);
}
/*
* initialise the AFS client FS module
*/
static int __init afs_init(void)
{
int ret = -ENOMEM;
printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
afs_wq = alloc_workqueue("afs", 0, 0);
if (!afs_wq)
goto error_afs_wq;
afs_async_calls = alloc_workqueue("kafsd", WQ_MEM_RECLAIM, 0);
if (!afs_async_calls)
goto error_async;
afs_vlocation_update_worker =
alloc_workqueue("kafs_vlupdated", WQ_MEM_RECLAIM, 0);
if (!afs_vlocation_update_worker)
goto error_vl_up;
afs_lock_manager = alloc_workqueue("kafs_lockd", WQ_MEM_RECLAIM, 0);
if (!afs_lock_manager)
goto error_lockmgr;
#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
ret = afs_net_init(&__afs_net);
if (ret < 0)
goto error_net;
/* register the filesystems */
ret = afs_fs_init();
if (ret < 0)
goto error_fs;
return ret;
error_fs:
afs_net_exit(&__afs_net);
error_net:
#ifdef CONFIG_AFS_FSCACHE
fscache_unregister_netfs(&afs_cache_netfs);
error_cache:
#endif
destroy_workqueue(afs_lock_manager);
error_lockmgr:
destroy_workqueue(afs_vlocation_update_worker);
error_vl_up:
destroy_workqueue(afs_async_calls);
error_async:
destroy_workqueue(afs_wq);
error_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_net_exit(&__afs_net);
#ifdef CONFIG_AFS_FSCACHE
fscache_unregister_netfs(&afs_cache_netfs);
#endif
destroy_workqueue(afs_lock_manager);
destroy_workqueue(afs_vlocation_update_worker);
destroy_workqueue(afs_async_calls);
destroy_workqueue(afs_wq);
afs_clean_up_permit_cache();
rcu_barrier();
}
module_exit(afs_exit);
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