186 lines
4.4 KiB
C
186 lines
4.4 KiB
C
/* AFS client file system
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*
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* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/completion.h>
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#include <linux/sched.h>
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#include "internal.h"
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MODULE_DESCRIPTION("AFS Client File System");
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MODULE_AUTHOR("Red Hat, Inc.");
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MODULE_LICENSE("GPL");
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unsigned afs_debug;
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module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO);
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MODULE_PARM_DESC(debug, "AFS debugging mask");
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static char *rootcell;
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module_param(rootcell, charp, 0);
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MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
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#ifdef AFS_CACHING_SUPPORT
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static struct cachefs_netfs_operations afs_cache_ops = {
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.get_page_cookie = afs_cache_get_page_cookie,
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};
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struct cachefs_netfs afs_cache_netfs = {
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.name = "afs",
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.version = 0,
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.ops = &afs_cache_ops,
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};
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#endif
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struct afs_uuid afs_uuid;
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/*
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* get a client UUID
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*/
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static int __init afs_get_client_UUID(void)
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{
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struct timespec ts;
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u64 uuidtime;
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u16 clockseq;
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int ret;
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/* read the MAC address of one of the external interfaces and construct
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* a UUID from it */
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ret = afs_get_MAC_address(afs_uuid.node, sizeof(afs_uuid.node));
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if (ret < 0)
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return ret;
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getnstimeofday(&ts);
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uuidtime = (u64) ts.tv_sec * 1000 * 1000 * 10;
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uuidtime += ts.tv_nsec / 100;
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uuidtime += AFS_UUID_TO_UNIX_TIME;
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afs_uuid.time_low = uuidtime;
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afs_uuid.time_mid = uuidtime >> 32;
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afs_uuid.time_hi_and_version = (uuidtime >> 48) & AFS_UUID_TIMEHI_MASK;
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afs_uuid.time_hi_and_version = AFS_UUID_VERSION_TIME;
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get_random_bytes(&clockseq, 2);
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afs_uuid.clock_seq_low = clockseq;
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afs_uuid.clock_seq_hi_and_reserved =
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(clockseq >> 8) & AFS_UUID_CLOCKHI_MASK;
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afs_uuid.clock_seq_hi_and_reserved = AFS_UUID_VARIANT_STD;
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_debug("AFS UUID: %08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
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afs_uuid.time_low,
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afs_uuid.time_mid,
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afs_uuid.time_hi_and_version,
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afs_uuid.clock_seq_hi_and_reserved,
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afs_uuid.clock_seq_low,
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afs_uuid.node[0], afs_uuid.node[1], afs_uuid.node[2],
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afs_uuid.node[3], afs_uuid.node[4], afs_uuid.node[5]);
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return 0;
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}
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/*
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* initialise the AFS client FS module
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*/
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static int __init afs_init(void)
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{
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int ret;
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printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
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ret = afs_get_client_UUID();
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if (ret < 0)
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return ret;
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/* register the /proc stuff */
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ret = afs_proc_init();
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if (ret < 0)
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return ret;
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#ifdef AFS_CACHING_SUPPORT
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/* we want to be able to cache */
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ret = cachefs_register_netfs(&afs_cache_netfs,
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&afs_cache_cell_index_def);
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if (ret < 0)
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goto error_cache;
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#endif
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/* initialise the cell DB */
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ret = afs_cell_init(rootcell);
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if (ret < 0)
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goto error_cell_init;
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/* initialise the VL update process */
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ret = afs_vlocation_update_init();
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if (ret < 0)
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goto error_vl_update_init;
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/* initialise the callback update process */
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ret = afs_callback_update_init();
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/* create the RxRPC transport */
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ret = afs_open_socket();
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if (ret < 0)
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goto error_open_socket;
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/* register the filesystems */
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ret = afs_fs_init();
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if (ret < 0)
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goto error_fs;
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return ret;
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error_fs:
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afs_close_socket();
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error_open_socket:
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error_vl_update_init:
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error_cell_init:
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#ifdef AFS_CACHING_SUPPORT
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cachefs_unregister_netfs(&afs_cache_netfs);
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error_cache:
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#endif
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afs_callback_update_kill();
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afs_vlocation_purge();
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afs_cell_purge();
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afs_proc_cleanup();
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rcu_barrier();
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printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
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return ret;
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}
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/* XXX late_initcall is kludgy, but the only alternative seems to create
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* a transport upon the first mount, which is worse. Or is it?
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*/
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late_initcall(afs_init); /* must be called after net/ to create socket */
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/*
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* clean up on module removal
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*/
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static void __exit afs_exit(void)
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{
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printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
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afs_fs_exit();
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afs_kill_lock_manager();
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afs_close_socket();
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afs_purge_servers();
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afs_callback_update_kill();
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afs_vlocation_purge();
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flush_scheduled_work();
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afs_cell_purge();
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#ifdef AFS_CACHING_SUPPORT
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cachefs_unregister_netfs(&afs_cache_netfs);
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#endif
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afs_proc_cleanup();
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rcu_barrier();
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}
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module_exit(afs_exit);
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