4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #define DEBUG_SUBSYSTEM S_LLITE
35 #include <linux/module.h>
36 #include <linux/types.h>
37 #include <lustre_ha.h>
38 #include <lustre_dlm.h>
39 #include <linux/init.h>
41 #include <lprocfs_status.h>
42 #include "llite_internal.h"
44 static struct kmem_cache *ll_inode_cachep;
46 static struct inode *ll_alloc_inode(struct super_block *sb)
48 struct ll_inode_info *lli;
50 ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_ALLOC_INODE, 1);
51 lli = kmem_cache_zalloc(ll_inode_cachep, GFP_NOFS);
55 inode_init_once(&lli->lli_vfs_inode);
56 return &lli->lli_vfs_inode;
59 static void ll_inode_destroy_callback(struct rcu_head *head)
61 struct inode *inode = container_of(head, struct inode, i_rcu);
62 struct ll_inode_info *ptr = ll_i2info(inode);
64 kmem_cache_free(ll_inode_cachep, ptr);
67 static void ll_destroy_inode(struct inode *inode)
69 call_rcu(&inode->i_rcu, ll_inode_destroy_callback);
72 /* exported operations */
73 struct super_operations lustre_super_operations = {
74 .alloc_inode = ll_alloc_inode,
75 .destroy_inode = ll_destroy_inode,
76 .evict_inode = ll_delete_inode,
77 .put_super = ll_put_super,
79 .umount_begin = ll_umount_begin,
80 .remount_fs = ll_remount_fs,
81 .show_options = ll_show_options,
83 MODULE_ALIAS_FS("lustre");
85 static int __init lustre_init(void)
87 struct lnet_process_id lnet_id;
91 BUILD_BUG_ON(sizeof(LUSTRE_VOLATILE_HDR) != LUSTRE_VOLATILE_HDR_LEN + 1);
93 /* print an address of _any_ initialized kernel symbol from this
94 * module, to allow debugging with gdb that doesn't support data
95 * symbols from modules.
97 CDEBUG(D_INFO, "Lustre client module (%p).\n",
98 &lustre_super_operations);
101 ll_inode_cachep = kmem_cache_create("lustre_inode_cache",
102 sizeof(struct ll_inode_info), 0,
103 SLAB_HWCACHE_ALIGN | SLAB_ACCOUNT,
105 if (!ll_inode_cachep)
108 ll_file_data_slab = kmem_cache_create("ll_file_data",
109 sizeof(struct ll_file_data), 0,
110 SLAB_HWCACHE_ALIGN, NULL);
111 if (!ll_file_data_slab)
114 llite_root = debugfs_create_dir("llite", debugfs_lustre_root);
115 if (IS_ERR_OR_NULL(llite_root)) {
116 rc = llite_root ? PTR_ERR(llite_root) : -ENOMEM;
121 llite_kset = kset_create_and_add("llite", NULL, lustre_kobj);
127 cfs_get_random_bytes(seed, sizeof(seed));
129 /* Nodes with small feet have little entropy. The NID for this
130 * node gives the most entropy in the low bits
133 if (LNetGetId(i, &lnet_id) == -ENOENT)
136 if (LNET_NETTYP(LNET_NIDNET(lnet_id.nid)) != LOLND)
137 seed[0] ^= LNET_NIDADDR(lnet_id.nid);
141 cfs_srand(ts.tv_sec ^ seed[0], ts.tv_nsec ^ seed[1]);
143 rc = vvp_global_init();
147 cl_inode_fini_env = cl_env_alloc(&cl_inode_fini_refcheck,
148 LCT_REMEMBER | LCT_NOREF);
149 if (IS_ERR(cl_inode_fini_env)) {
150 rc = PTR_ERR(cl_inode_fini_env);
154 cl_inode_fini_env->le_ctx.lc_cookie = 0x4;
156 rc = ll_xattr_init();
158 goto out_inode_fini_env;
160 lustre_register_client_fill_super(ll_fill_super);
161 lustre_register_kill_super_cb(ll_kill_super);
162 lustre_register_client_process_config(ll_process_config);
167 cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
171 kset_unregister(llite_kset);
173 debugfs_remove(llite_root);
175 kmem_cache_destroy(ll_inode_cachep);
176 kmem_cache_destroy(ll_file_data_slab);
180 static void __exit lustre_exit(void)
182 lustre_register_client_fill_super(NULL);
183 lustre_register_kill_super_cb(NULL);
184 lustre_register_client_process_config(NULL);
186 debugfs_remove(llite_root);
187 kset_unregister(llite_kset);
190 cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
193 kmem_cache_destroy(ll_inode_cachep);
194 kmem_cache_destroy(ll_file_data_slab);
197 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
198 MODULE_DESCRIPTION("Lustre Client File System");
199 MODULE_VERSION(LUSTRE_VERSION_STRING);
200 MODULE_LICENSE("GPL");
202 module_init(lustre_init);
203 module_exit(lustre_exit);