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, 2014, 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"
48 #include "vvp_internal.h"
50 static struct kmem_cache *ll_inode_cachep;
52 static struct inode *ll_alloc_inode(struct super_block *sb)
54 struct ll_inode_info *lli;
55 ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_ALLOC_INODE, 1);
56 OBD_SLAB_ALLOC_PTR_GFP(lli, ll_inode_cachep, GFP_NOFS);
60 inode_init_once(&lli->lli_vfs_inode);
61 return &lli->lli_vfs_inode;
64 #ifdef HAVE_INODE_I_RCU
65 static void ll_inode_destroy_callback(struct rcu_head *head)
67 struct inode *inode = container_of(head, struct inode, i_rcu);
68 struct ll_inode_info *ptr = ll_i2info(inode);
69 OBD_SLAB_FREE_PTR(ptr, ll_inode_cachep);
72 static void ll_destroy_inode(struct inode *inode)
74 call_rcu(&inode->i_rcu, ll_inode_destroy_callback);
77 static void ll_destroy_inode(struct inode *inode)
79 struct ll_inode_info *ptr = ll_i2info(inode);
80 OBD_SLAB_FREE_PTR(ptr, ll_inode_cachep);
84 /* exported operations */
85 struct super_operations lustre_super_operations =
87 .alloc_inode = ll_alloc_inode,
88 .destroy_inode = ll_destroy_inode,
89 #ifdef HAVE_SBOPS_EVICT_INODE
90 .evict_inode = ll_delete_inode,
92 .clear_inode = ll_clear_inode,
93 .delete_inode = ll_delete_inode,
95 .put_super = ll_put_super,
97 .umount_begin = ll_umount_begin,
98 .remount_fs = ll_remount_fs,
99 .show_options = ll_show_options,
103 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg));
105 static int __init lustre_init(void)
107 struct proc_dir_entry *entry;
108 lnet_process_id_t lnet_id;
112 CLASSERT(sizeof(LUSTRE_VOLATILE_HDR) == LUSTRE_VOLATILE_HDR_LEN + 1);
114 /* print an address of _any_ initialized kernel symbol from this
115 * module, to allow debugging with gdb that doesn't support data
116 * symbols from modules.*/
117 CDEBUG(D_INFO, "Lustre client module (%p).\n",
118 &lustre_super_operations);
120 ll_inode_cachep = kmem_cache_create("lustre_inode_cache",
121 sizeof(struct ll_inode_info),
122 0, SLAB_HWCACHE_ALIGN, NULL);
123 if (ll_inode_cachep == NULL)
124 GOTO(out_cache, rc = -ENOMEM);
126 ll_file_data_slab = kmem_cache_create("ll_file_data",
127 sizeof(struct ll_file_data), 0,
128 SLAB_HWCACHE_ALIGN, NULL);
129 if (ll_file_data_slab == NULL)
130 GOTO(out_cache, rc = -ENOMEM);
132 ll_remote_perm_cachep = kmem_cache_create("ll_remote_perm_cache",
133 sizeof(struct ll_remote_perm),
135 if (ll_remote_perm_cachep == NULL)
136 GOTO(out_cache, rc = -ENOMEM);
138 ll_rmtperm_hash_cachep = kmem_cache_create("ll_rmtperm_hash_cache",
139 REMOTE_PERM_HASHSIZE *
140 sizeof(struct list_head),
142 if (ll_rmtperm_hash_cachep == NULL)
143 GOTO(out_cache, rc = -ENOMEM);
145 entry = lprocfs_register("llite", proc_lustre_root, NULL, NULL);
148 CERROR("cannot register '/proc/fs/lustre/llite': rc = %d\n",
153 proc_lustre_fs_root = entry;
155 cfs_get_random_bytes(seed, sizeof(seed));
157 /* Nodes with small feet have little entropy. The NID for this
158 * node gives the most entropy in the low bits. */
160 if (LNetGetId(i, &lnet_id) == -ENOENT)
163 if (LNET_NETTYP(LNET_NIDNET(lnet_id.nid)) != LOLND)
164 seed[0] ^= LNET_NIDADDR(lnet_id.nid);
167 do_gettimeofday(&tv);
168 cfs_srand(tv.tv_sec ^ seed[0], tv.tv_usec ^ seed[1]);
170 rc = vvp_global_init();
174 cl_inode_fini_env = cl_env_alloc(&cl_inode_fini_refcheck,
175 LCT_REMEMBER | LCT_NOREF);
176 if (IS_ERR(cl_inode_fini_env))
177 GOTO(out_vvp, rc = PTR_ERR(cl_inode_fini_env));
179 cl_inode_fini_env->le_ctx.lc_cookie = 0x4;
181 rc = ll_xattr_init();
183 GOTO(out_inode_fini_env, rc);
185 lustre_register_client_fill_super(ll_fill_super);
186 lustre_register_kill_super_cb(ll_kill_super);
187 lustre_register_client_process_config(ll_process_config);
192 cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
196 lprocfs_remove(&proc_lustre_fs_root);
198 if (ll_inode_cachep != NULL)
199 kmem_cache_destroy(ll_inode_cachep);
201 if (ll_file_data_slab != NULL)
202 kmem_cache_destroy(ll_file_data_slab);
204 if (ll_remote_perm_cachep != NULL)
205 kmem_cache_destroy(ll_remote_perm_cachep);
207 if (ll_rmtperm_hash_cachep != NULL)
208 kmem_cache_destroy(ll_rmtperm_hash_cachep);
213 static void __exit lustre_exit(void)
215 lustre_register_client_fill_super(NULL);
216 lustre_register_kill_super_cb(NULL);
217 lustre_register_client_process_config(NULL);
219 lprocfs_remove(&proc_lustre_fs_root);
222 cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
225 kmem_cache_destroy(ll_inode_cachep);
226 kmem_cache_destroy(ll_rmtperm_hash_cachep);
227 kmem_cache_destroy(ll_remote_perm_cachep);
228 kmem_cache_destroy(ll_file_data_slab);
231 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
232 MODULE_DESCRIPTION("Lustre Client File System");
233 MODULE_VERSION(LUSTRE_VERSION_STRING);
234 MODULE_LICENSE("GPL");
236 module_init(lustre_init);
237 module_exit(lustre_exit);