256 lines
6.3 KiB
C
256 lines
6.3 KiB
C
/* 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>
|
|
#include <linux/proc_fs.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;
|
|
static struct proc_dir_entry *afs_proc_symlink;
|
|
|
|
#if defined(CONFIG_ALPHA)
|
|
const char afs_init_sysname[] = "alpha_linux26";
|
|
#elif defined(CONFIG_X86_64)
|
|
const char afs_init_sysname[] = "amd64_linux26";
|
|
#elif defined(CONFIG_ARM)
|
|
const char afs_init_sysname[] = "arm_linux26";
|
|
#elif defined(CONFIG_ARM64)
|
|
const char afs_init_sysname[] = "aarch64_linux26";
|
|
#elif defined(CONFIG_X86_32)
|
|
const char afs_init_sysname[] = "i386_linux26";
|
|
#elif defined(CONFIG_IA64)
|
|
const char afs_init_sysname[] = "ia64_linux26";
|
|
#elif defined(CONFIG_PPC64)
|
|
const char afs_init_sysname[] = "ppc64_linux26";
|
|
#elif defined(CONFIG_PPC32)
|
|
const char afs_init_sysname[] = "ppc_linux26";
|
|
#elif defined(CONFIG_S390)
|
|
#ifdef CONFIG_64BIT
|
|
const char afs_init_sysname[] = "s390x_linux26";
|
|
#else
|
|
const char afs_init_sysname[] = "s390_linux26";
|
|
#endif
|
|
#elif defined(CONFIG_SPARC64)
|
|
const char afs_init_sysname[] = "sparc64_linux26";
|
|
#elif defined(CONFIG_SPARC32)
|
|
const char afs_init_sysname[] = "sparc_linux26";
|
|
#else
|
|
const char afs_init_sysname[] = "unknown_linux26";
|
|
#endif
|
|
|
|
/*
|
|
* Initialise an AFS network namespace record.
|
|
*/
|
|
static int __net_init afs_net_init(struct net *net_ns)
|
|
{
|
|
struct afs_sysnames *sysnames;
|
|
struct afs_net *net = afs_net(net_ns);
|
|
int ret;
|
|
|
|
net->net = net_ns;
|
|
net->live = true;
|
|
generate_random_uuid((unsigned char *)&net->uuid);
|
|
|
|
INIT_WORK(&net->charge_preallocation_work, afs_charge_preallocation);
|
|
mutex_init(&net->socket_mutex);
|
|
|
|
net->cells = RB_ROOT;
|
|
seqlock_init(&net->cells_lock);
|
|
INIT_WORK(&net->cells_manager, afs_manage_cells);
|
|
timer_setup(&net->cells_timer, afs_cells_timer, 0);
|
|
|
|
mutex_init(&net->proc_cells_lock);
|
|
INIT_HLIST_HEAD(&net->proc_cells);
|
|
|
|
seqlock_init(&net->fs_lock);
|
|
net->fs_servers = RB_ROOT;
|
|
INIT_LIST_HEAD(&net->fs_updates);
|
|
INIT_HLIST_HEAD(&net->fs_proc);
|
|
|
|
INIT_HLIST_HEAD(&net->fs_addresses4);
|
|
INIT_HLIST_HEAD(&net->fs_addresses6);
|
|
seqlock_init(&net->fs_addr_lock);
|
|
|
|
INIT_WORK(&net->fs_manager, afs_manage_servers);
|
|
timer_setup(&net->fs_timer, afs_servers_timer, 0);
|
|
|
|
ret = -ENOMEM;
|
|
sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
|
|
if (!sysnames)
|
|
goto error_sysnames;
|
|
sysnames->subs[0] = (char *)&afs_init_sysname;
|
|
sysnames->nr = 1;
|
|
refcount_set(&sysnames->usage, 1);
|
|
net->sysnames = sysnames;
|
|
rwlock_init(&net->sysnames_lock);
|
|
|
|
/* 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:
|
|
net->live = false;
|
|
afs_cell_purge(net);
|
|
afs_purge_servers(net);
|
|
error_cell_init:
|
|
net->live = false;
|
|
afs_proc_cleanup(net);
|
|
error_proc:
|
|
afs_put_sysnames(net->sysnames);
|
|
error_sysnames:
|
|
net->live = false;
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Clean up and destroy an AFS network namespace record.
|
|
*/
|
|
static void __net_exit afs_net_exit(struct net *net_ns)
|
|
{
|
|
struct afs_net *net = afs_net(net_ns);
|
|
|
|
net->live = false;
|
|
afs_cell_purge(net);
|
|
afs_purge_servers(net);
|
|
afs_close_socket(net);
|
|
afs_proc_cleanup(net);
|
|
afs_put_sysnames(net->sysnames);
|
|
}
|
|
|
|
static struct pernet_operations afs_net_ops = {
|
|
.init = afs_net_init,
|
|
.exit = afs_net_exit,
|
|
.id = &afs_net_id,
|
|
.size = sizeof(struct afs_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_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 = register_pernet_device(&afs_net_ops);
|
|
if (ret < 0)
|
|
goto error_net;
|
|
|
|
/* register the filesystems */
|
|
ret = afs_fs_init();
|
|
if (ret < 0)
|
|
goto error_fs;
|
|
|
|
afs_proc_symlink = proc_symlink("fs/afs", NULL, "../self/net/afs");
|
|
if (IS_ERR(afs_proc_symlink)) {
|
|
ret = PTR_ERR(afs_proc_symlink);
|
|
goto error_proc;
|
|
}
|
|
|
|
return ret;
|
|
|
|
error_proc:
|
|
afs_fs_exit();
|
|
error_fs:
|
|
unregister_pernet_device(&afs_net_ops);
|
|
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_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");
|
|
|
|
proc_remove(afs_proc_symlink);
|
|
afs_fs_exit();
|
|
unregister_pernet_device(&afs_net_ops);
|
|
#ifdef CONFIG_AFS_FSCACHE
|
|
fscache_unregister_netfs(&afs_cache_netfs);
|
|
#endif
|
|
destroy_workqueue(afs_lock_manager);
|
|
destroy_workqueue(afs_async_calls);
|
|
destroy_workqueue(afs_wq);
|
|
afs_clean_up_permit_cache();
|
|
rcu_barrier();
|
|
}
|
|
|
|
module_exit(afs_exit);
|