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/
32 #define DEBUG_SUBSYSTEM S_LLITE
34 #define D_MOUNT (D_SUPER | D_CONFIG/*|D_WARNING */)
36 #include <linux/module.h>
37 #include <linux/types.h>
38 #include <linux/version.h>
39 #include <lustre_ha.h>
40 #include <lustre_dlm.h>
41 #include <linux/init.h>
43 #include <linux/random.h>
44 #include <lprocfs_status.h>
45 #include "llite_internal.h"
46 #include "vvp_internal.h"
48 static struct kmem_cache *ll_inode_cachep;
50 static struct inode *ll_alloc_inode(struct super_block *sb)
52 struct ll_inode_info *lli;
53 OBD_SLAB_ALLOC_PTR_GFP(lli, ll_inode_cachep, GFP_NOFS);
57 inode_init_once(&lli->lli_vfs_inode);
58 return &lli->lli_vfs_inode;
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 llcrypt_free_inode(inode);
66 OBD_SLAB_FREE_PTR(ptr, ll_inode_cachep);
69 static void ll_destroy_inode(struct inode *inode)
71 call_rcu(&inode->i_rcu, ll_inode_destroy_callback);
74 static int ll_drop_inode(struct inode *inode)
76 struct ll_sb_info *sbi = ll_i2sbi(inode);
79 if (!sbi->ll_inode_cache_enabled)
82 drop = generic_drop_inode(inode);
84 drop = llcrypt_drop_inode(inode);
89 /* exported operations */
90 const struct super_operations lustre_super_operations =
92 .alloc_inode = ll_alloc_inode,
93 .destroy_inode = ll_destroy_inode,
94 .drop_inode = ll_drop_inode,
95 .evict_inode = ll_delete_inode,
96 .put_super = ll_put_super,
98 .umount_begin = ll_umount_begin,
99 .remount_fs = ll_remount_fs,
100 .show_options = ll_show_options,
104 * This is the entry point for the mount call into Lustre.
105 * This is called when a client is mounted, and this is
106 * where we start setting things up.
108 * @lmd2data data Mount options (e.g. -o flock,abort_recov)
110 static int lustre_fill_super(struct super_block *sb, void *lmd2_data,
113 struct lustre_mount_data *lmd;
114 struct lustre_sb_info *lsi;
119 CDEBUG(D_MOUNT|D_VFSTRACE, "VFS Op: sb %p\n", sb);
121 lsi = lustre_init_lsi(sb);
127 * Disable lockdep during mount, because mount locking patterns are
133 * LU-639: the OBD cleanup of last mount may not finish yet, wait here.
135 obd_zombie_barrier();
137 /* Figure out the lmd from the mount options */
138 if (lmd_parse(lmd2_data, lmd)) {
140 GOTO(out, rc = -EINVAL);
143 if (!lmd_is_client(lmd)) {
144 #ifdef HAVE_SERVER_SUPPORT
145 #if LUSTRE_VERSION_CODE > OBD_OCD_VERSION(2, 15, 51, 0)
149 LCONSOLE_WARN("%s: mounting server target with '-t lustre' deprecated, use '-t lustre_tgt'\n",
154 rc = server_fill_super(sb);
157 CERROR("%s: This is client-side-only module, cannot handle server mount: rc = %d\n",
158 lmd->lmd_profile, rc);
164 CDEBUG(D_MOUNT, "Mounting client %s\n", lmd->lmd_profile);
165 rc = lustre_start_mgc(sb);
167 lustre_common_put_super(sb);
170 /* Connect and start */
171 rc = ll_fill_super(sb);
172 /* ll_file_super will call lustre_common_put_super on failure,
173 * which takes care of the module reference.
175 * If error happens in fill_super() call, @lsi will be killed there.
176 * This is why we do not put it here.
180 CERROR("llite: Unable to mount %s: rc = %d\n",
181 s2lsi(sb) ? lmd->lmd_dev : "<unknown>", rc);
183 CDEBUG(D_SUPER, "%s: Mount complete\n",
190 /***************** FS registration ******************/
191 static struct dentry *lustre_mount(struct file_system_type *fs_type, int flags,
192 const char *devname, void *data)
194 return mount_nodev(fs_type, flags, data, lustre_fill_super);
197 static void lustre_kill_super(struct super_block *sb)
199 struct lustre_sb_info *lsi = s2lsi(sb);
201 if (lsi && !IS_SERVER(lsi))
207 /** Register the "lustre" fs type
209 static struct file_system_type lustre_fs_type = {
210 .owner = THIS_MODULE,
212 .mount = lustre_mount,
213 .kill_sb = lustre_kill_super,
214 .fs_flags = FS_RENAME_DOES_D_MOVE,
216 MODULE_ALIAS_FS("lustre");
218 static int __init lustre_init(void)
221 unsigned long lustre_inode_cache_flags;
223 BUILD_BUG_ON(sizeof(LUSTRE_VOLATILE_HDR) !=
224 LUSTRE_VOLATILE_HDR_LEN + 1);
226 /* print an address of _any_ initialized kernel symbol from this
227 * module, to allow debugging with gdb that doesn't support data
228 * symbols from modules.*/
229 CDEBUG(D_INFO, "Lustre client module (%p).\n",
230 &lustre_super_operations);
232 lustre_inode_cache_flags = SLAB_HWCACHE_ALIGN | SLAB_RECLAIM_ACCOUNT |
235 lustre_inode_cache_flags |= SLAB_ACCOUNT;
238 ll_inode_cachep = kmem_cache_create("lustre_inode_cache",
239 sizeof(struct ll_inode_info),
240 0, lustre_inode_cache_flags, NULL);
241 if (ll_inode_cachep == NULL)
242 GOTO(out_cache, rc = -ENOMEM);
244 ll_file_data_slab = kmem_cache_create("ll_file_data",
245 sizeof(struct ll_file_data), 0,
246 SLAB_HWCACHE_ALIGN, NULL);
247 if (ll_file_data_slab == NULL)
248 GOTO(out_cache, rc = -ENOMEM);
250 pcc_inode_slab = kmem_cache_create("ll_pcc_inode",
251 sizeof(struct pcc_inode), 0,
252 SLAB_HWCACHE_ALIGN, NULL);
253 if (pcc_inode_slab == NULL)
254 GOTO(out_cache, rc = -ENOMEM);
256 rc = llite_tunables_register();
260 rc = vvp_global_init();
262 GOTO(out_tunables, rc);
264 cl_inode_fini_env = cl_env_alloc(&cl_inode_fini_refcheck,
265 LCT_REMEMBER | LCT_NOREF);
266 if (IS_ERR(cl_inode_fini_env))
267 GOTO(out_vvp, rc = PTR_ERR(cl_inode_fini_env));
269 cl_inode_fini_env->le_ctx.lc_cookie = 0x4;
271 rc = ll_xattr_init();
273 GOTO(out_inode_fini_env, rc);
275 rc = register_filesystem(&lustre_fs_type);
284 cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
288 llite_tunables_unregister();
290 kmem_cache_destroy(ll_inode_cachep);
291 kmem_cache_destroy(ll_file_data_slab);
292 kmem_cache_destroy(pcc_inode_slab);
296 static void __exit lustre_exit(void)
298 unregister_filesystem(&lustre_fs_type);
300 llite_tunables_unregister();
303 cl_env_put(cl_inode_fini_env, &cl_inode_fini_refcheck);
307 * Make sure all delayed rcu free inodes are flushed before we
312 kmem_cache_destroy(ll_inode_cachep);
313 kmem_cache_destroy(ll_file_data_slab);
314 kmem_cache_destroy(pcc_inode_slab);
317 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
318 MODULE_DESCRIPTION("Lustre Client File System");
319 MODULE_VERSION(LUSTRE_VERSION_STRING);
320 MODULE_LICENSE("GPL");
322 module_init(lustre_init);
323 module_exit(lustre_exit);