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) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Whamcloud, Inc.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 * Lustre Management Server (MGS) filesystem interface code
40 * Author: Nathan Rutman <nathan@clusterfs.com>
41 * Author: Alex Zhuravlev <bzzz@whamcloud.com>
44 #define DEBUG_SUBSYSTEM S_MGS
46 #include <linux/module.h>
47 #include <linux/kmod.h>
48 #include <linux/version.h>
49 #include <linux/sched.h>
50 #include <linux/mount.h>
51 #include <obd_class.h>
52 #include <obd_support.h>
53 #include <lustre_disk.h>
54 #include <lustre_lib.h>
55 #include <lustre_fsfilt.h>
56 #include <libcfs/list.h>
57 #include <lustre_fid.h>
58 #include "mgs_internal.h"
60 int mgs_export_stats_init(struct obd_device *obd, struct obd_export *exp,
64 lnet_nid_t *client_nid = localdata;
68 rc = lprocfs_exp_setup(exp, client_nid, &newnid);
70 /* Mask error for already created
77 struct nid_stat *tmp = exp->exp_nid_stats;
80 num_stats = (sizeof(*obd->obd_type->typ_dt_ops) / sizeof(void *)) +
82 tmp->nid_stats = lprocfs_alloc_stats(num_stats,
83 LPROCFS_STATS_FLAG_NOPERCPU);
84 if (tmp->nid_stats == NULL)
86 lprocfs_init_ops_stats(LPROC_MGS_LAST, tmp->nid_stats);
87 mgs_stats_counter_init(tmp->nid_stats);
88 rc = lprocfs_register_stats(tmp->nid_proc, "stats",
93 rc = lprocfs_nid_ldlm_stats_init(tmp);
103 * Add client export data to the MGS. This data is currently NOT stored on
104 * disk in the last_rcvd file or anywhere else. In the event of a MGS
105 * crash all connections are treated as new connections.
107 int mgs_client_add(struct obd_device *obd, struct obd_export *exp,
113 /* Remove client export data from the MGS */
114 int mgs_client_free(struct obd_export *exp)
119 /* Same as mds_lvfs_fid2dentry */
120 /* Look up an entry by inode number. */
121 /* this function ONLY returns valid dget'd dentries with an initialized inode
123 static struct dentry *mgs_lvfs_fid2dentry(__u64 id, __u32 gen,
124 __u64 gr, void *data)
126 struct fsfilt_fid fid;
127 struct obd_device *obd = (struct obd_device *)data;
128 struct mgs_device *mgs = lu2mgs_dev(obd->obd_lu_dev);
131 CDEBUG(D_DENTRY, "--> mgs_fid2dentry: ino/gen %lu/%u, sb %p\n",
132 (unsigned long)id, gen, mgs->mgs_sb);
135 RETURN(ERR_PTR(-ESTALE));
140 RETURN(fsfilt_fid2dentry(obd, mgs->mgs_vfsmnt, &fid, 0));
143 struct lvfs_callback_ops mgs_lvfs_ops = {
144 l_fid2dentry: mgs_lvfs_fid2dentry,
147 int mgs_fs_setup_old(const struct lu_env *env, struct mgs_device *mgs)
149 struct obd_device *obd = mgs->mgs_obd;
150 struct dt_device_param p;
151 struct vfsmount *mnt;
152 struct lvfs_run_ctxt saved;
153 struct dentry *dentry;
157 dt_conf_get(env, mgs->mgs_bottom, &p);
160 CERROR("%s: no proper support for OSD yet\n", obd->obd_name);
164 /* FIXME what's this? Do I need it? */
165 rc = cfs_cleanup_group_info();
169 mgs->mgs_vfsmnt = mnt;
170 mgs->mgs_sb = mnt->mnt_root->d_inode->i_sb;
172 obd->obd_fsops = fsfilt_get_ops(mt_str(p.ddp_mount_type));
173 if (IS_ERR(obd->obd_fsops))
174 RETURN(PTR_ERR(obd->obd_fsops));
176 rc = fsfilt_setup(obd, mgs->mgs_sb);
180 OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
181 obd->obd_lvfs_ctxt.pwdmnt = mnt;
182 obd->obd_lvfs_ctxt.pwd = mnt->mnt_root;
183 obd->obd_lvfs_ctxt.fs = get_ds();
184 obd->obd_lvfs_ctxt.cb_ops = mgs_lvfs_ops;
186 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
188 /* Setup the configs dir */
189 dentry = simple_mkdir(cfs_fs_pwd(current->fs), mnt, MOUNT_CONFIGS_DIR, 0777, 1);
190 if (IS_ERR(dentry)) {
191 rc = PTR_ERR(dentry);
192 CERROR("cannot create %s directory: rc = %d\n",
193 MOUNT_CONFIGS_DIR, rc);
196 mgs->mgs_configs_dir_old = dentry;
198 /* create directory to store nid table versions */
199 dentry = simple_mkdir(cfs_fs_pwd(current->fs), mnt, MGS_NIDTBL_DIR,
201 if (IS_ERR(dentry)) {
202 rc = PTR_ERR(dentry);
203 CERROR("cannot create %s directory: rc = %d\n",
204 MOUNT_CONFIGS_DIR, rc);
211 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
215 int mgs_fs_cleanup_old(const struct lu_env *env, struct mgs_device *mgs)
217 struct obd_device *obd = mgs->mgs_obd;
218 struct lvfs_run_ctxt saved;
221 class_disconnect_exports(obd); /* cleans up client info too */
223 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
225 if (mgs->mgs_configs_dir_old) {
226 l_dput(mgs->mgs_configs_dir_old);
227 mgs->mgs_configs_dir_old = NULL;
230 shrink_dcache_sb(mgs->mgs_sb);
232 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
235 fsfilt_put_ops(obd->obd_fsops);
240 int mgs_fs_setup(const struct lu_env *env, struct mgs_device *mgs)
245 struct dt_object *root;
249 /* FIXME what's this? Do I need it? */
250 rc = cfs_cleanup_group_info();
254 /* XXX: fix when support for N:1 layering is implemented */
255 LASSERT(mgs->mgs_dt_dev.dd_lu_dev.ld_site);
256 mgs->mgs_dt_dev.dd_lu_dev.ld_site->ls_top_dev =
257 &mgs->mgs_dt_dev.dd_lu_dev;
259 /* Setup the configs dir */
260 fid.f_seq = FID_SEQ_LOCAL_NAME;
263 rc = local_oid_storage_init(env, mgs->mgs_bottom, &fid, &mgs->mgs_los);
267 rc = dt_root_get(env, mgs->mgs_bottom, &rfid);
271 root = dt_locate_at(env, mgs->mgs_bottom, &rfid,
272 &mgs->mgs_dt_dev.dd_lu_dev);
273 if (unlikely(IS_ERR(root)))
274 GOTO(out_los, PTR_ERR(root));
276 o = local_file_find_or_create(env, mgs->mgs_los, root,
278 S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO);
280 GOTO(out_root, rc = PTR_ERR(o));
282 mgs->mgs_configs_dir = o;
284 /* create directory to store nid table versions */
285 o = local_file_find_or_create(env, mgs->mgs_los, root, MGS_NIDTBL_DIR,
286 S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO);
288 lu_object_put(env, &mgs->mgs_configs_dir->do_lu);
289 mgs->mgs_configs_dir = NULL;
290 GOTO(out_root, rc = PTR_ERR(o));
293 mgs->mgs_nidtbl_dir = o;
296 lu_object_put(env, &root->do_lu);
299 local_oid_storage_fini(env, mgs->mgs_los);
303 mgs->mgs_dt_dev.dd_lu_dev.ld_site->ls_top_dev = NULL;
306 rc = mgs_fs_setup_old(env, mgs);
308 mgs_fs_cleanup(env, mgs);
314 int mgs_fs_cleanup(const struct lu_env *env, struct mgs_device *mgs)
316 mgs_fs_cleanup_old(env, mgs);
318 class_disconnect_exports(mgs->mgs_obd); /* cleans up client info too */
320 if (mgs->mgs_configs_dir) {
321 lu_object_put(env, &mgs->mgs_configs_dir->do_lu);
322 mgs->mgs_configs_dir = NULL;
324 if (mgs->mgs_nidtbl_dir) {
325 lu_object_put(env, &mgs->mgs_nidtbl_dir->do_lu);
326 mgs->mgs_nidtbl_dir = NULL;
329 local_oid_storage_fini(env, mgs->mgs_los);