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, 2016, 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 <linux/version.h>
38 #include <lustre_ha.h>
39 #include <lustre_dlm.h>
40 #include <linux/init.h>
42 #include <linux/random.h>
43 #include <lprocfs_status.h>
44 #include "llite_internal.h"
45 #include "vvp_internal.h"
47 static struct kmem_cache *ll_inode_cachep;
49 static struct inode *ll_alloc_inode(struct super_block *sb)
51 struct ll_inode_info *lli;
52 OBD_SLAB_ALLOC_PTR_GFP(lli, 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);
64 OBD_SLAB_FREE_PTR(ptr, ll_inode_cachep);
67 static void ll_destroy_inode(struct inode *inode)
69 call_rcu(&inode->i_rcu, ll_inode_destroy_callback);
72 /* exported operations */
73 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,
85 static int __init lustre_init(void)
87 struct lnet_process_id lnet_id;
89 unsigned long lustre_inode_cache_flags;
91 CLASSERT(sizeof(LUSTRE_VOLATILE_HDR) == LUSTRE_VOLATILE_HDR_LEN + 1);
93 /* print an address of _any_ initialized kernel symbol from this
94 * module, to allow debugging with gdb that doesn't support data
95 * symbols from modules.*/
96 CDEBUG(D_INFO, "Lustre client module (%p).\n",
97 &lustre_super_operations);
99 lustre_inode_cache_flags = SLAB_HWCACHE_ALIGN | SLAB_RECLAIM_ACCOUNT |
102 lustre_inode_cache_flags |= SLAB_ACCOUNT;
105 ll_inode_cachep = kmem_cache_create("lustre_inode_cache",
106 sizeof(struct ll_inode_info),
107 0, lustre_inode_cache_flags, NULL);
108 if (ll_inode_cachep == NULL)
109 GOTO(out_cache, rc = -ENOMEM);
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 == NULL)
115 GOTO(out_cache, rc = -ENOMEM);
117 pcc_inode_slab = kmem_cache_create("ll_pcc_inode",
118 sizeof(struct pcc_inode), 0,
119 SLAB_HWCACHE_ALIGN, NULL);
120 if (pcc_inode_slab == NULL)
121 GOTO(out_cache, rc = -ENOMEM);
123 rc = llite_tunables_register();
127 /* Nodes with small feet have little entropy. The NID for this
128 * node gives the most entropy in the low bits. */
130 if (LNetGetId(i, &lnet_id) == -ENOENT)
133 add_device_randomness(&lnet_id.nid, sizeof(lnet_id.nid));
136 rc = vvp_global_init();
138 GOTO(out_tunables, rc);
140 cl_inode_fini_env = cl_env_alloc(&cl_inode_fini_refcheck,
141 LCT_REMEMBER | LCT_NOREF);
142 if (IS_ERR(cl_inode_fini_env))
143 GOTO(out_vvp, rc = PTR_ERR(cl_inode_fini_env));
145 cl_inode_fini_env->le_ctx.lc_cookie = 0x4;
147 rc = ll_xattr_init();
149 GOTO(out_inode_fini_env, rc);
151 lustre_register_client_fill_super(ll_fill_super);
152 lustre_register_kill_super_cb(ll_kill_super);
157 cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
161 llite_tunables_unregister();
163 kmem_cache_destroy(ll_inode_cachep);
164 kmem_cache_destroy(ll_file_data_slab);
165 kmem_cache_destroy(pcc_inode_slab);
169 static void __exit lustre_exit(void)
171 lustre_register_client_fill_super(NULL);
172 lustre_register_kill_super_cb(NULL);
174 llite_tunables_unregister();
177 cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
181 * Make sure all delayed rcu free inodes are flushed before we
186 kmem_cache_destroy(ll_inode_cachep);
187 kmem_cache_destroy(ll_file_data_slab);
188 kmem_cache_destroy(pcc_inode_slab);
191 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
192 MODULE_DESCRIPTION("Lustre Client File System");
193 MODULE_VERSION(LUSTRE_VERSION_STRING);
194 MODULE_LICENSE("GPL");
196 module_init(lustre_init);
197 module_exit(lustre_exit);