1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Lustre Client Super operations
6 * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
8 * This file is part of Lustre, http://www.lustre.org.
10 * Lustre is free software; you can redistribute it and/or
11 * modify it under the terms of version 2 of the GNU General Public
12 * License as published by the Free Software Foundation.
14 * Lustre is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with Lustre; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #define DEBUG_SUBSYSTEM S_LLITE
26 #include <linux/module.h>
27 #include <linux/types.h>
28 #include <linux/random.h>
29 #include <linux/version.h>
30 #include <lustre_lite.h>
31 #include <lustre_ha.h>
32 #include <lustre_dlm.h>
33 #include <linux/init.h>
35 #include <linux/random.h>
36 #include <linux/cache_def.h>
37 #include <lprocfs_status.h>
38 #include "llite_internal.h"
39 #include <lustre/lustre_user.h>
41 extern struct address_space_operations ll_aops;
42 extern struct address_space_operations ll_dir_aops;
45 /* exported operations */
46 struct super_operations lustre_super_operations =
48 .read_inode2 = ll_read_inode2,
49 .clear_inode = ll_clear_inode,
50 .put_super = ll_put_super,
52 .umount_begin = ll_umount_begin,
53 .fh_to_dentry = ll_fh_to_dentry,
54 .dentry_to_fh = ll_dentry_to_fh,
55 .remount_fs = ll_remount_fs,
59 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg));
61 static int __init init_lustre_lite(void)
65 lnet_process_id_t lnet_id;
67 printk(KERN_INFO "Lustre: Lustre Client File System; "
68 "info@clusterfs.com\n");
69 ll_file_data_slab = cfs_mem_cache_create("ll_file_data",
70 sizeof(struct ll_file_data), 0,
72 if (ll_file_data_slab == NULL)
76 proc_lustre_fs_root = proc_mkdir("llite", proc_lustre_root);
78 ll_register_cache(&ll_cache_definition);
80 lustre_register_client_fill_super(ll_fill_super);
81 lustre_register_client_process_config(ll_process_config);
83 get_random_bytes(seed, sizeof(seed));
85 /* Nodes with small feet have little entropy
86 * the NID for this node gives the most entropy in the low bits */
88 if (LNetGetId(i, &lnet_id) == -ENOENT) {
91 if (LNET_NETTYP(LNET_NIDNET(lnet_id.nid)) != LOLND) {
92 seed[0] ^= LNET_NIDADDR(lnet_id.nid);
97 ll_srand(tv.tv_sec ^ seed[0], tv.tv_usec ^ seed[1]);
102 static void __exit exit_lustre_lite(void)
106 lustre_register_client_fill_super(NULL);
107 lustre_register_client_process_config(NULL);
109 ll_unregister_cache(&ll_cache_definition);
111 rc = cfs_mem_cache_destroy(ll_file_data_slab);
112 LASSERTF(rc == 0, "couldn't destroy ll_file_data slab\n");
113 if (ll_async_page_slab) {
114 rc = cfs_mem_cache_destroy(ll_async_page_slab);
115 LASSERTF(rc == 0, "couldn't destroy ll_async_page slab\n");
118 if (proc_lustre_fs_root)
119 lprocfs_remove(&proc_lustre_fs_root);
122 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
123 MODULE_DESCRIPTION("Lustre Lite Client File System");
124 MODULE_LICENSE("GPL");
126 module_init(init_lustre_lite);
127 module_exit(exit_lustre_lite);