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 (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2011, 2012, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
39 #define DEBUG_SUBSYSTEM S_LLITE
41 #include <linux/module.h>
42 #include <linux/types.h>
43 #include <linux/version.h>
44 #include <lustre_lite.h>
45 #include <lustre_ha.h>
46 #include <lustre_dlm.h>
47 #include <linux/init.h>
49 #include <lprocfs_status.h>
50 #include "llite_internal.h"
52 static cfs_mem_cache_t *ll_inode_cachep;
54 static struct inode *ll_alloc_inode(struct super_block *sb)
56 struct ll_inode_info *lli;
57 ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_ALLOC_INODE, 1);
58 OBD_SLAB_ALLOC_PTR_GFP(lli, ll_inode_cachep, CFS_ALLOC_IO);
62 inode_init_once(&lli->lli_vfs_inode);
63 return &lli->lli_vfs_inode;
66 static void ll_destroy_inode(struct inode *inode)
68 struct ll_inode_info *ptr = ll_i2info(inode);
69 OBD_SLAB_FREE_PTR(ptr, ll_inode_cachep);
72 int ll_init_inodecache(void)
74 ll_inode_cachep = cfs_mem_cache_create("lustre_inode_cache",
75 sizeof(struct ll_inode_info),
76 0, CFS_SLAB_HWCACHE_ALIGN);
77 if (ll_inode_cachep == NULL)
82 void ll_destroy_inodecache(void)
86 rc = cfs_mem_cache_destroy(ll_inode_cachep);
87 LASSERTF(rc == 0, "ll_inode_cache: not all structures were freed\n");
90 /* exported operations */
91 struct super_operations lustre_super_operations =
93 .alloc_inode = ll_alloc_inode,
94 .destroy_inode = ll_destroy_inode,
95 #ifdef HAVE_SBOPS_EVICT_INODE
96 .evict_inode = ll_delete_inode,
98 .clear_inode = ll_clear_inode,
99 .delete_inode = ll_delete_inode,
101 .put_super = ll_put_super,
103 .umount_begin = ll_umount_begin,
104 .remount_fs = ll_remount_fs,
105 .show_options = ll_show_options,
109 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg));
111 int vvp_global_init(void);
112 void vvp_global_fini(void);
114 static int __init init_lustre_lite(void)
118 lnet_process_id_t lnet_id;
120 /* print an address of _any_ initialized kernel symbol from this
121 * module, to allow debugging with gdb that doesn't support data
122 * symbols from modules.*/
123 CDEBUG(D_INFO, "Lustre client module (%p).\n",
124 &lustre_super_operations);
126 rc = ll_init_inodecache();
129 ll_file_data_slab = cfs_mem_cache_create("ll_file_data",
130 sizeof(struct ll_file_data), 0,
131 CFS_SLAB_HWCACHE_ALIGN);
132 if (ll_file_data_slab == NULL) {
133 ll_destroy_inodecache();
137 ll_remote_perm_cachep = cfs_mem_cache_create("ll_remote_perm_cache",
138 sizeof(struct ll_remote_perm),
140 if (ll_remote_perm_cachep == NULL) {
141 cfs_mem_cache_destroy(ll_file_data_slab);
142 ll_file_data_slab = NULL;
143 ll_destroy_inodecache();
147 ll_rmtperm_hash_cachep = cfs_mem_cache_create("ll_rmtperm_hash_cache",
148 REMOTE_PERM_HASHSIZE *
151 if (ll_rmtperm_hash_cachep == NULL) {
152 cfs_mem_cache_destroy(ll_remote_perm_cachep);
153 ll_remote_perm_cachep = NULL;
154 cfs_mem_cache_destroy(ll_file_data_slab);
155 ll_file_data_slab = NULL;
156 ll_destroy_inodecache();
160 proc_lustre_fs_root = proc_lustre_root ?
161 lprocfs_register("llite", proc_lustre_root, NULL, NULL) : NULL;
163 lustre_register_client_fill_super(ll_fill_super);
164 lustre_register_kill_super_cb(ll_kill_super);
166 lustre_register_client_process_config(ll_process_config);
168 cfs_get_random_bytes(seed, sizeof(seed));
170 /* Nodes with small feet have little entropy
171 * the NID for this node gives the most entropy in the low bits */
173 if (LNetGetId(i, &lnet_id) == -ENOENT) {
176 if (LNET_NETTYP(LNET_NIDNET(lnet_id.nid)) != LOLND) {
177 seed[0] ^= LNET_NIDADDR(lnet_id.nid);
181 cfs_gettimeofday(&tv);
182 cfs_srand(tv.tv_sec ^ seed[0], tv.tv_usec ^ seed[1]);
184 init_timer(&ll_capa_timer);
185 ll_capa_timer.function = ll_capa_timer_callback;
186 rc = ll_capa_thread_start();
188 * XXX normal cleanup is needed here.
191 rc = vvp_global_init();
196 static void __exit exit_lustre_lite(void)
201 del_timer(&ll_capa_timer);
202 ll_capa_thread_stop();
203 LASSERTF(capa_count[CAPA_SITE_CLIENT] == 0,
204 "client remaining capa count %d\n",
205 capa_count[CAPA_SITE_CLIENT]);
207 lustre_register_client_fill_super(NULL);
208 lustre_register_kill_super_cb(NULL);
210 lustre_register_client_process_config(NULL);
212 ll_destroy_inodecache();
214 rc = cfs_mem_cache_destroy(ll_rmtperm_hash_cachep);
215 LASSERTF(rc == 0, "couldn't destroy ll_rmtperm_hash_cachep\n");
216 ll_rmtperm_hash_cachep = NULL;
218 rc = cfs_mem_cache_destroy(ll_remote_perm_cachep);
219 LASSERTF(rc == 0, "couldn't destroy ll_remote_perm_cachep\n");
220 ll_remote_perm_cachep = NULL;
222 rc = cfs_mem_cache_destroy(ll_file_data_slab);
223 LASSERTF(rc == 0, "couldn't destroy ll_file_data slab\n");
224 if (proc_lustre_fs_root)
225 lprocfs_remove(&proc_lustre_fs_root);
228 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
229 MODULE_DESCRIPTION("Lustre Lite Client File System");
230 MODULE_LICENSE("GPL");
232 module_init(init_lustre_lite);
233 module_exit(exit_lustre_lite);