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, 2012, 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 <linux/version.h>
42 #include <lustre_ha.h>
43 #include <lustre_dlm.h>
44 #include <linux/init.h>
46 #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;
54 ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_ALLOC_INODE, 1);
55 OBD_SLAB_ALLOC_PTR_GFP(lli, ll_inode_cachep, GFP_NOFS);
59 inode_init_once(&lli->lli_vfs_inode);
60 return &lli->lli_vfs_inode;
63 #ifdef HAVE_INODE_I_RCU
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);
68 OBD_SLAB_FREE_PTR(ptr, ll_inode_cachep);
71 static void ll_destroy_inode(struct inode *inode)
73 call_rcu(&inode->i_rcu, ll_inode_destroy_callback);
76 static void ll_destroy_inode(struct inode *inode)
78 struct ll_inode_info *ptr = ll_i2info(inode);
79 OBD_SLAB_FREE_PTR(ptr, ll_inode_cachep);
83 static int ll_init_inodecache(void)
85 ll_inode_cachep = kmem_cache_create("lustre_inode_cache",
86 sizeof(struct ll_inode_info),
87 0, SLAB_HWCACHE_ALIGN, NULL);
88 if (ll_inode_cachep == NULL)
93 static void ll_destroy_inodecache(void)
95 kmem_cache_destroy(ll_inode_cachep);
98 /* exported operations */
99 struct super_operations lustre_super_operations =
101 .alloc_inode = ll_alloc_inode,
102 .destroy_inode = ll_destroy_inode,
103 #ifdef HAVE_SBOPS_EVICT_INODE
104 .evict_inode = ll_delete_inode,
106 .clear_inode = ll_clear_inode,
107 .delete_inode = ll_delete_inode,
109 .put_super = ll_put_super,
111 .umount_begin = ll_umount_begin,
112 .remount_fs = ll_remount_fs,
113 .show_options = ll_show_options,
117 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg));
119 static int __init init_lustre_lite(void)
123 lnet_process_id_t lnet_id;
125 CLASSERT(sizeof(LUSTRE_VOLATILE_HDR) == LUSTRE_VOLATILE_HDR_LEN + 1);
127 /* print an address of _any_ initialized kernel symbol from this
128 * module, to allow debugging with gdb that doesn't support data
129 * symbols from modules.*/
130 CDEBUG(D_INFO, "Lustre client module (%p).\n",
131 &lustre_super_operations);
133 rc = ll_init_inodecache();
136 ll_file_data_slab = kmem_cache_create("ll_file_data",
137 sizeof(struct ll_file_data), 0,
138 SLAB_HWCACHE_ALIGN, NULL);
139 if (ll_file_data_slab == NULL) {
140 ll_destroy_inodecache();
144 ll_remote_perm_cachep = kmem_cache_create("ll_remote_perm_cache",
145 sizeof(struct ll_remote_perm),
147 if (ll_remote_perm_cachep == NULL) {
148 kmem_cache_destroy(ll_file_data_slab);
149 ll_file_data_slab = NULL;
150 ll_destroy_inodecache();
154 ll_rmtperm_hash_cachep = kmem_cache_create("ll_rmtperm_hash_cache",
155 REMOTE_PERM_HASHSIZE *
156 sizeof(struct list_head),
158 if (ll_rmtperm_hash_cachep == NULL) {
159 kmem_cache_destroy(ll_remote_perm_cachep);
160 ll_remote_perm_cachep = NULL;
161 kmem_cache_destroy(ll_file_data_slab);
162 ll_file_data_slab = NULL;
163 ll_destroy_inodecache();
167 proc_lustre_fs_root = proc_lustre_root ?
168 lprocfs_seq_register("llite", proc_lustre_root,
171 lustre_register_client_fill_super(ll_fill_super);
172 lustre_register_kill_super_cb(ll_kill_super);
174 lustre_register_client_process_config(ll_process_config);
176 cfs_get_random_bytes(seed, sizeof(seed));
178 /* Nodes with small feet have little entropy
179 * the NID for this node gives the most entropy in the low bits */
181 if (LNetGetId(i, &lnet_id) == -ENOENT) {
184 if (LNET_NETTYP(LNET_NIDNET(lnet_id.nid)) != LOLND) {
185 seed[0] ^= LNET_NIDADDR(lnet_id.nid);
189 do_gettimeofday(&tv);
190 cfs_srand(tv.tv_sec ^ seed[0], tv.tv_usec ^ seed[1]);
192 init_timer(&ll_capa_timer);
193 ll_capa_timer.function = ll_capa_timer_callback;
194 rc = ll_capa_thread_start();
196 * XXX normal cleanup is needed here.
199 rc = vvp_global_init();
202 rc = ll_xattr_init();
207 static void __exit exit_lustre_lite(void)
211 del_timer(&ll_capa_timer);
212 ll_capa_thread_stop();
213 LASSERTF(capa_count[CAPA_SITE_CLIENT] == 0,
214 "client remaining capa count %d\n",
215 capa_count[CAPA_SITE_CLIENT]);
217 lustre_register_client_fill_super(NULL);
218 lustre_register_kill_super_cb(NULL);
220 lustre_register_client_process_config(NULL);
222 ll_destroy_inodecache();
224 kmem_cache_destroy(ll_rmtperm_hash_cachep);
225 ll_rmtperm_hash_cachep = NULL;
227 kmem_cache_destroy(ll_remote_perm_cachep);
228 ll_remote_perm_cachep = NULL;
230 kmem_cache_destroy(ll_file_data_slab);
231 if (proc_lustre_fs_root)
232 lprocfs_remove(&proc_lustre_fs_root);
235 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
236 MODULE_DESCRIPTION("Lustre Lite Client File System");
237 MODULE_LICENSE("GPL");
239 module_init(init_lustre_lite);
240 module_exit(exit_lustre_lite);