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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_LLITE
39 #include <linux/module.h>
40 #include <linux/types.h>
41 #include "../include/lustre_lite.h"
42 #include "../include/lustre_ha.h"
43 #include "../include/lustre_dlm.h"
44 #include <linux/init.h>
46 #include "../include/lprocfs_status.h"
47 #include "llite_internal.h"
49 static struct kmem_cache *ll_inode_cachep;
51 static struct inode *ll_alloc_inode(struct super_block *sb)
53 struct ll_inode_info *lli;
55 ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_ALLOC_INODE, 1);
56 lli = kmem_cache_zalloc(ll_inode_cachep, GFP_NOFS);
60 inode_init_once(&lli->lli_vfs_inode);
61 return &lli->lli_vfs_inode;
64 static void ll_inode_destroy_callback(struct rcu_head *head)
66 struct inode *inode = container_of(head, struct inode, i_rcu);
67 struct ll_inode_info *ptr = ll_i2info(inode);
69 kmem_cache_free(ll_inode_cachep, ptr);
72 static void ll_destroy_inode(struct inode *inode)
74 call_rcu(&inode->i_rcu, ll_inode_destroy_callback);
77 /* exported operations */
78 struct super_operations lustre_super_operations = {
79 .alloc_inode = ll_alloc_inode,
80 .destroy_inode = ll_destroy_inode,
81 .evict_inode = ll_delete_inode,
82 .put_super = ll_put_super,
84 .umount_begin = ll_umount_begin,
85 .remount_fs = ll_remount_fs,
86 .show_options = ll_show_options,
88 MODULE_ALIAS_FS("lustre");
90 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg));
92 static int __init lustre_init(void)
94 lnet_process_id_t lnet_id;
98 CLASSERT(sizeof(LUSTRE_VOLATILE_HDR) == LUSTRE_VOLATILE_HDR_LEN + 1);
100 /* print an address of _any_ initialized kernel symbol from this
101 * module, to allow debugging with gdb that doesn't support data
102 * symbols from modules.
104 CDEBUG(D_INFO, "Lustre client module (%p).\n",
105 &lustre_super_operations);
108 ll_inode_cachep = kmem_cache_create("lustre_inode_cache",
109 sizeof(struct ll_inode_info),
110 0, SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT,
112 if (!ll_inode_cachep)
115 ll_file_data_slab = kmem_cache_create("ll_file_data",
116 sizeof(struct ll_file_data), 0,
117 SLAB_HWCACHE_ALIGN, NULL);
118 if (!ll_file_data_slab)
121 ll_remote_perm_cachep = kmem_cache_create("ll_remote_perm_cache",
122 sizeof(struct ll_remote_perm),
124 if (!ll_remote_perm_cachep)
127 ll_rmtperm_hash_cachep = kmem_cache_create("ll_rmtperm_hash_cache",
128 REMOTE_PERM_HASHSIZE *
129 sizeof(struct list_head),
131 if (!ll_rmtperm_hash_cachep)
134 llite_root = debugfs_create_dir("llite", debugfs_lustre_root);
135 if (IS_ERR_OR_NULL(llite_root)) {
136 rc = llite_root ? PTR_ERR(llite_root) : -ENOMEM;
141 llite_kset = kset_create_and_add("llite", NULL, lustre_kobj);
147 cfs_get_random_bytes(seed, sizeof(seed));
149 /* Nodes with small feet have little entropy. The NID for this
150 * node gives the most entropy in the low bits
153 if (LNetGetId(i, &lnet_id) == -ENOENT)
156 if (LNET_NETTYP(LNET_NIDNET(lnet_id.nid)) != LOLND)
157 seed[0] ^= LNET_NIDADDR(lnet_id.nid);
161 cfs_srand(ts.tv_sec ^ seed[0], ts.tv_nsec ^ seed[1]);
163 rc = vvp_global_init();
167 cl_inode_fini_env = cl_env_alloc(&cl_inode_fini_refcheck,
168 LCT_REMEMBER | LCT_NOREF);
169 if (IS_ERR(cl_inode_fini_env)) {
170 rc = PTR_ERR(cl_inode_fini_env);
174 cl_inode_fini_env->le_ctx.lc_cookie = 0x4;
176 rc = ll_xattr_init();
178 goto out_inode_fini_env;
180 lustre_register_client_fill_super(ll_fill_super);
181 lustre_register_kill_super_cb(ll_kill_super);
182 lustre_register_client_process_config(ll_process_config);
187 cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
191 kset_unregister(llite_kset);
193 debugfs_remove(llite_root);
195 kmem_cache_destroy(ll_inode_cachep);
196 kmem_cache_destroy(ll_file_data_slab);
197 kmem_cache_destroy(ll_remote_perm_cachep);
198 kmem_cache_destroy(ll_rmtperm_hash_cachep);
202 static void __exit lustre_exit(void)
204 lustre_register_client_fill_super(NULL);
205 lustre_register_kill_super_cb(NULL);
206 lustre_register_client_process_config(NULL);
208 debugfs_remove(llite_root);
209 kset_unregister(llite_kset);
212 cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
215 kmem_cache_destroy(ll_inode_cachep);
216 kmem_cache_destroy(ll_rmtperm_hash_cachep);
218 kmem_cache_destroy(ll_remote_perm_cachep);
220 kmem_cache_destroy(ll_file_data_slab);
223 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
224 MODULE_DESCRIPTION("Lustre Client File System");
225 MODULE_VERSION(LUSTRE_VERSION_STRING);
226 MODULE_LICENSE("GPL");
228 module_init(lustre_init);
229 module_exit(lustre_exit);