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 <lprocfs_status.h>
43 #include "llite_internal.h"
44 #include "vvp_internal.h"
46 static struct kmem_cache *ll_inode_cachep;
48 static struct inode *ll_alloc_inode(struct super_block *sb)
50 struct ll_inode_info *lli;
51 ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_ALLOC_INODE, 1);
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 #ifdef HAVE_INODE_I_RCU
61 static void ll_inode_destroy_callback(struct rcu_head *head)
63 struct inode *inode = container_of(head, struct inode, i_rcu);
64 struct ll_inode_info *ptr = ll_i2info(inode);
65 OBD_SLAB_FREE_PTR(ptr, ll_inode_cachep);
68 static void ll_destroy_inode(struct inode *inode)
70 call_rcu(&inode->i_rcu, ll_inode_destroy_callback);
73 static void ll_destroy_inode(struct inode *inode)
75 struct ll_inode_info *ptr = ll_i2info(inode);
76 OBD_SLAB_FREE_PTR(ptr, ll_inode_cachep);
80 /* exported operations */
81 struct super_operations lustre_super_operations =
83 .alloc_inode = ll_alloc_inode,
84 .destroy_inode = ll_destroy_inode,
85 #ifdef HAVE_SBOPS_EVICT_INODE
86 .evict_inode = ll_delete_inode,
88 .clear_inode = ll_clear_inode,
89 .delete_inode = ll_delete_inode,
91 .put_super = ll_put_super,
93 .umount_begin = ll_umount_begin,
94 .remount_fs = ll_remount_fs,
95 .show_options = ll_show_options,
99 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg));
101 static int __init lustre_init(void)
103 struct proc_dir_entry *entry;
104 struct lnet_process_id lnet_id;
105 struct timespec64 ts;
108 CLASSERT(sizeof(LUSTRE_VOLATILE_HDR) == LUSTRE_VOLATILE_HDR_LEN + 1);
110 /* print an address of _any_ initialized kernel symbol from this
111 * module, to allow debugging with gdb that doesn't support data
112 * symbols from modules.*/
113 CDEBUG(D_INFO, "Lustre client module (%p).\n",
114 &lustre_super_operations);
116 ll_inode_cachep = kmem_cache_create("lustre_inode_cache",
117 sizeof(struct ll_inode_info),
118 0, SLAB_HWCACHE_ALIGN, NULL);
119 if (ll_inode_cachep == NULL)
120 GOTO(out_cache, rc = -ENOMEM);
122 ll_file_data_slab = kmem_cache_create("ll_file_data",
123 sizeof(struct ll_file_data), 0,
124 SLAB_HWCACHE_ALIGN, NULL);
125 if (ll_file_data_slab == NULL)
126 GOTO(out_cache, rc = -ENOMEM);
128 entry = lprocfs_register("llite", proc_lustre_root, NULL, NULL);
131 CERROR("cannot register '/proc/fs/lustre/llite': rc = %d\n",
136 proc_lustre_fs_root = entry;
138 cfs_get_random_bytes(seed, sizeof(seed));
140 /* Nodes with small feet have little entropy. The NID for this
141 * node gives the most entropy in the low bits. */
143 if (LNetGetId(i, &lnet_id) == -ENOENT)
146 if (LNET_NETTYP(LNET_NIDNET(lnet_id.nid)) != LOLND)
147 seed[0] ^= LNET_NIDADDR(lnet_id.nid);
151 cfs_srand(ts.tv_sec ^ seed[0], ts.tv_nsec ^ seed[1]);
153 rc = vvp_global_init();
157 cl_inode_fini_env = cl_env_alloc(&cl_inode_fini_refcheck,
158 LCT_REMEMBER | LCT_NOREF);
159 if (IS_ERR(cl_inode_fini_env))
160 GOTO(out_vvp, rc = PTR_ERR(cl_inode_fini_env));
162 cl_inode_fini_env->le_ctx.lc_cookie = 0x4;
164 rc = ll_xattr_init();
166 GOTO(out_inode_fini_env, rc);
168 lustre_register_client_fill_super(ll_fill_super);
169 lustre_register_kill_super_cb(ll_kill_super);
170 lustre_register_client_process_config(ll_process_config);
175 cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
179 lprocfs_remove(&proc_lustre_fs_root);
181 if (ll_inode_cachep != NULL)
182 kmem_cache_destroy(ll_inode_cachep);
184 if (ll_file_data_slab != NULL)
185 kmem_cache_destroy(ll_file_data_slab);
190 static void __exit lustre_exit(void)
192 lustre_register_client_fill_super(NULL);
193 lustre_register_kill_super_cb(NULL);
194 lustre_register_client_process_config(NULL);
196 lprocfs_remove(&proc_lustre_fs_root);
199 cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
202 kmem_cache_destroy(ll_inode_cachep);
203 kmem_cache_destroy(ll_file_data_slab);
206 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
207 MODULE_DESCRIPTION("Lustre Client File System");
208 MODULE_VERSION(LUSTRE_VERSION_STRING);
209 MODULE_LICENSE("GPL");
211 module_init(lustre_init);
212 module_exit(lustre_exit);