1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
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/random.h>
42 #include <linux/version.h>
43 #include <lustre_lite.h>
44 #include <lustre_ha.h>
45 #include <lustre_dlm.h>
46 #include <linux/init.h>
48 #include <lprocfs_status.h>
49 #include "llite_internal.h"
51 static cfs_mem_cache_t *ll_inode_cachep;
53 static struct inode *ll_alloc_inode(struct super_block *sb)
55 struct ll_inode_info *lli;
56 ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_ALLOC_INODE, 1);
57 OBD_SLAB_ALLOC_PTR(lli, ll_inode_cachep);
61 inode_init_once(&lli->lli_vfs_inode);
64 return &lli->lli_vfs_inode;
67 static void ll_destroy_inode(struct inode *inode)
69 struct ll_inode_info *ptr = ll_i2info(inode);
70 OBD_SLAB_FREE_PTR(ptr, ll_inode_cachep);
73 int ll_init_inodecache(void)
75 ll_inode_cachep = cfs_mem_cache_create("lustre_inode_cache",
76 sizeof(struct ll_inode_info),
77 0, SLAB_HWCACHE_ALIGN);
78 if (ll_inode_cachep == NULL)
83 void ll_destroy_inodecache(void)
87 rc = cfs_mem_cache_destroy(ll_inode_cachep);
88 LASSERTF(rc == 0, "ll_inode_cache: not all structures were freed\n");
91 /* exported operations */
92 struct super_operations lustre_super_operations =
94 .alloc_inode = ll_alloc_inode,
95 .destroy_inode = ll_destroy_inode,
96 .clear_inode = ll_clear_inode,
97 .put_super = ll_put_super,
99 .umount_begin = ll_umount_begin,
100 .remount_fs = ll_remount_fs,
101 .show_options = ll_show_options,
105 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg));
107 static struct shrinker *ll_shrinker;
109 static int __init init_lustre_lite(void)
113 lnet_process_id_t lnet_id;
115 printk(KERN_INFO "Lustre: Lustre Client File System; "
116 "http://www.lustre.org/\n");
117 rc = ll_init_inodecache();
120 ll_file_data_slab = cfs_mem_cache_create("ll_file_data",
121 sizeof(struct ll_file_data), 0,
123 if (ll_file_data_slab == NULL) {
124 ll_destroy_inodecache();
128 proc_lustre_fs_root = proc_lustre_root ?
129 proc_mkdir("llite", proc_lustre_root) : NULL;
131 init_rwsem(&ll_sb_sem);
132 ll_shrinker = set_shrinker(DEFAULT_SEEKS, ll_shrink_cache);
134 lustre_register_client_fill_super(ll_fill_super);
135 lustre_register_kill_super_cb(ll_kill_super);
137 lustre_register_client_process_config(ll_process_config);
139 ll_get_random_bytes(seed, sizeof(seed));
141 /* Nodes with small feet have little entropy
142 * the NID for this node gives the most entropy in the low bits */
144 if (LNetGetId(i, &lnet_id) == -ENOENT) {
147 if (LNET_NETTYP(LNET_NIDNET(lnet_id.nid)) != LOLND) {
148 seed[0] ^= LNET_NIDADDR(lnet_id.nid);
152 do_gettimeofday(&tv);
153 ll_srand(tv.tv_sec ^ seed[0], tv.tv_usec ^ seed[1]);
158 static void __exit exit_lustre_lite(void)
162 lustre_register_client_fill_super(NULL);
163 lustre_register_kill_super_cb(NULL);
165 lustre_register_client_process_config(NULL);
167 remove_shrinker(ll_shrinker);
169 ll_destroy_inodecache();
170 rc = cfs_mem_cache_destroy(ll_file_data_slab);
171 LASSERTF(rc == 0, "couldn't destroy ll_file_data slab\n");
173 if (ll_async_page_slab) {
174 rc = cfs_mem_cache_destroy(ll_async_page_slab);
175 LASSERTF(rc == 0, "couldn't destroy ll_async_page slab\n");
178 if (proc_lustre_fs_root)
179 lprocfs_remove(&proc_lustre_fs_root);
182 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
183 MODULE_DESCRIPTION("Lustre Lite Client File System");
184 MODULE_LICENSE("GPL");
186 module_init(init_lustre_lite);
187 module_exit(exit_lustre_lite);