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 "../include/lustre_lite.h"
38 #include "../include/lustre_ha.h"
39 #include "../include/lustre_dlm.h"
40 #include <linux/init.h>
42 #include "../include/lprocfs_status.h"
43 #include "llite_internal.h"
45 static struct kmem_cache
*ll_inode_cachep
;
47 static struct inode
*ll_alloc_inode(struct super_block
*sb
)
49 struct ll_inode_info
*lli
;
51 ll_stats_ops_tally(ll_s2sbi(sb
), LPROC_LL_ALLOC_INODE
, 1);
52 lli
= kmem_cache_zalloc(ll_inode_cachep
, GFP_NOFS
);
56 inode_init_once(&lli
->lli_vfs_inode
);
57 return &lli
->lli_vfs_inode
;
60 static void ll_inode_destroy_callback(struct rcu_head
*head
)
62 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
63 struct ll_inode_info
*ptr
= ll_i2info(inode
);
65 kmem_cache_free(ll_inode_cachep
, ptr
);
68 static void ll_destroy_inode(struct inode
*inode
)
70 call_rcu(&inode
->i_rcu
, ll_inode_destroy_callback
);
73 /* exported operations */
74 struct super_operations lustre_super_operations
= {
75 .alloc_inode
= ll_alloc_inode
,
76 .destroy_inode
= ll_destroy_inode
,
77 .evict_inode
= ll_delete_inode
,
78 .put_super
= ll_put_super
,
80 .umount_begin
= ll_umount_begin
,
81 .remount_fs
= ll_remount_fs
,
82 .show_options
= ll_show_options
,
84 MODULE_ALIAS_FS("lustre");
86 void lustre_register_client_process_config(int (*cpc
)(struct lustre_cfg
*lcfg
));
88 static int __init
lustre_init(void)
90 lnet_process_id_t lnet_id
;
94 CLASSERT(sizeof(LUSTRE_VOLATILE_HDR
) == LUSTRE_VOLATILE_HDR_LEN
+ 1);
96 /* print an address of _any_ initialized kernel symbol from this
97 * module, to allow debugging with gdb that doesn't support data
98 * symbols from modules.
100 CDEBUG(D_INFO
, "Lustre client module (%p).\n",
101 &lustre_super_operations
);
104 ll_inode_cachep
= kmem_cache_create("lustre_inode_cache",
105 sizeof(struct ll_inode_info
),
106 0, SLAB_HWCACHE_ALIGN
|SLAB_ACCOUNT
,
108 if (!ll_inode_cachep
)
111 ll_file_data_slab
= kmem_cache_create("ll_file_data",
112 sizeof(struct ll_file_data
), 0,
113 SLAB_HWCACHE_ALIGN
, NULL
);
114 if (!ll_file_data_slab
)
117 llite_root
= debugfs_create_dir("llite", debugfs_lustre_root
);
118 if (IS_ERR_OR_NULL(llite_root
)) {
119 rc
= llite_root
? PTR_ERR(llite_root
) : -ENOMEM
;
124 llite_kset
= kset_create_and_add("llite", NULL
, lustre_kobj
);
130 cfs_get_random_bytes(seed
, sizeof(seed
));
132 /* Nodes with small feet have little entropy. The NID for this
133 * node gives the most entropy in the low bits
136 if (LNetGetId(i
, &lnet_id
) == -ENOENT
)
139 if (LNET_NETTYP(LNET_NIDNET(lnet_id
.nid
)) != LOLND
)
140 seed
[0] ^= LNET_NIDADDR(lnet_id
.nid
);
144 cfs_srand(ts
.tv_sec
^ seed
[0], ts
.tv_nsec
^ seed
[1]);
146 rc
= vvp_global_init();
150 cl_inode_fini_env
= cl_env_alloc(&cl_inode_fini_refcheck
,
151 LCT_REMEMBER
| LCT_NOREF
);
152 if (IS_ERR(cl_inode_fini_env
)) {
153 rc
= PTR_ERR(cl_inode_fini_env
);
157 cl_inode_fini_env
->le_ctx
.lc_cookie
= 0x4;
159 rc
= ll_xattr_init();
161 goto out_inode_fini_env
;
163 lustre_register_client_fill_super(ll_fill_super
);
164 lustre_register_kill_super_cb(ll_kill_super
);
165 lustre_register_client_process_config(ll_process_config
);
170 cl_env_put(cl_inode_fini_env
, &cl_inode_fini_refcheck
);
174 kset_unregister(llite_kset
);
176 debugfs_remove(llite_root
);
178 kmem_cache_destroy(ll_inode_cachep
);
179 kmem_cache_destroy(ll_file_data_slab
);
183 static void __exit
lustre_exit(void)
185 lustre_register_client_fill_super(NULL
);
186 lustre_register_kill_super_cb(NULL
);
187 lustre_register_client_process_config(NULL
);
189 debugfs_remove(llite_root
);
190 kset_unregister(llite_kset
);
193 cl_env_put(cl_inode_fini_env
, &cl_inode_fini_refcheck
);
196 kmem_cache_destroy(ll_inode_cachep
);
197 kmem_cache_destroy(ll_file_data_slab
);
200 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
201 MODULE_DESCRIPTION("Lustre Client File System");
202 MODULE_VERSION(LUSTRE_VERSION_STRING
);
203 MODULE_LICENSE("GPL");
205 module_init(lustre_init
);
206 module_exit(lustre_exit
);