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_alloc(ll_inode_cachep, GFP_NOFS | __GFP_ZERO);
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 init_lustre_lite(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.*/
103 CDEBUG(D_INFO, "Lustre client module (%p).\n",
104 &lustre_super_operations);
107 ll_inode_cachep = kmem_cache_create("lustre_inode_cache",
108 sizeof(struct ll_inode_info),
109 0, SLAB_HWCACHE_ALIGN, NULL);
110 if (ll_inode_cachep == NULL)
113 ll_file_data_slab = kmem_cache_create("ll_file_data",
114 sizeof(struct ll_file_data), 0,
115 SLAB_HWCACHE_ALIGN, NULL);
116 if (ll_file_data_slab == NULL)
119 ll_remote_perm_cachep = kmem_cache_create("ll_remote_perm_cache",
120 sizeof(struct ll_remote_perm),
122 if (ll_remote_perm_cachep == NULL)
125 ll_rmtperm_hash_cachep = kmem_cache_create("ll_rmtperm_hash_cache",
126 REMOTE_PERM_HASHSIZE *
127 sizeof(struct list_head),
129 if (ll_rmtperm_hash_cachep == NULL)
132 llite_root = debugfs_create_dir("llite", debugfs_lustre_root);
133 if (IS_ERR_OR_NULL(llite_root)) {
134 rc = llite_root ? PTR_ERR(llite_root) : -ENOMEM;
139 llite_kset = kset_create_and_add("llite", NULL, lustre_kobj);
145 cfs_get_random_bytes(seed, sizeof(seed));
147 /* Nodes with small feet have little entropy. The NID for this
148 * node gives the most entropy in the low bits */
150 if (LNetGetId(i, &lnet_id) == -ENOENT)
153 if (LNET_NETTYP(LNET_NIDNET(lnet_id.nid)) != LOLND)
154 seed[0] ^= LNET_NIDADDR(lnet_id.nid);
158 cfs_srand(ts.tv_sec ^ seed[0], ts.tv_nsec ^ seed[1]);
160 rc = vvp_global_init();
164 rc = ll_xattr_init();
168 lustre_register_client_fill_super(ll_fill_super);
169 lustre_register_kill_super_cb(ll_kill_super);
170 lustre_register_client_process_config(ll_process_config);
177 kset_unregister(llite_kset);
179 debugfs_remove(llite_root);
181 kmem_cache_destroy(ll_inode_cachep);
182 kmem_cache_destroy(ll_file_data_slab);
183 kmem_cache_destroy(ll_remote_perm_cachep);
184 kmem_cache_destroy(ll_rmtperm_hash_cachep);
188 static void __exit exit_lustre_lite(void)
190 lustre_register_client_fill_super(NULL);
191 lustre_register_kill_super_cb(NULL);
192 lustre_register_client_process_config(NULL);
194 debugfs_remove(llite_root);
195 kset_unregister(llite_kset);
200 kmem_cache_destroy(ll_inode_cachep);
201 kmem_cache_destroy(ll_rmtperm_hash_cachep);
203 kmem_cache_destroy(ll_remote_perm_cachep);
205 kmem_cache_destroy(ll_file_data_slab);
208 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
209 MODULE_DESCRIPTION("Lustre Lite Client File System");
210 MODULE_LICENSE("GPL");
212 module_init(init_lustre_lite);
213 module_exit(exit_lustre_lite);