-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * lustre/mgs/mgs_fs.c
- * Lustre Management Server (MGS) filesystem interface code
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * Copyright (C) 2006 Cluster File Systems, Inc.
- * Author: Nathan Rutman <nathan@clusterfs.com>
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
- * Lustre is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * GPL HEADER END
*/
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, Whamcloud, Inc.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/mgs/mgs_fs.c
+ *
+ * Lustre Management Server (MGS) filesystem interface code
+ *
+ * Author: Nathan Rutman <nathan@clusterfs.com>
+ */
+
#define DEBUG_SUBSYSTEM S_MGS
#include <linux/module.h>
#include <linux/kmod.h>
#include <linux/version.h>
#include <linux/sched.h>
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
#include <linux/mount.h>
-#endif
#include <obd_class.h>
#include <obd_support.h>
#include <lustre_disk.h>
#include <libcfs/list.h>
#include "mgs_internal.h"
-/* Same as mds_fid2dentry */
+int mgs_export_stats_init(struct obd_device *obd, struct obd_export *exp,
+ void *localdata)
+
+{
+ lnet_nid_t *client_nid = localdata;
+ int rc, newnid;
+ ENTRY;
+
+ rc = lprocfs_exp_setup(exp, client_nid, &newnid);
+ if (rc) {
+ /* Mask error for already created
+ * /proc entries */
+ if (rc == -EALREADY)
+ rc = 0;
+ RETURN(rc);
+ }
+ if (newnid) {
+ struct nid_stat *tmp = exp->exp_nid_stats;
+ int num_stats = 0;
+
+ num_stats = (sizeof(*obd->obd_type->typ_dt_ops) / sizeof(void *)) +
+ LPROC_MGS_LAST - 1;
+ tmp->nid_stats = lprocfs_alloc_stats(num_stats,
+ LPROCFS_STATS_FLAG_NOPERCPU);
+ if (tmp->nid_stats == NULL)
+ return -ENOMEM;
+ lprocfs_init_ops_stats(LPROC_MGS_LAST, tmp->nid_stats);
+ mgs_stats_counter_init(tmp->nid_stats);
+ rc = lprocfs_register_stats(tmp->nid_proc, "stats",
+ tmp->nid_stats);
+ if (rc)
+ GOTO(clean, rc);
+
+ rc = lprocfs_nid_ldlm_stats_init(tmp);
+ if (rc)
+ GOTO(clean, rc);
+ }
+ RETURN(0);
+clean:
+ return rc;
+}
+
+/**
+ * Add client export data to the MGS. This data is currently NOT stored on
+ * disk in the last_rcvd file or anywhere else. In the event of a MGS
+ * crash all connections are treated as new connections.
+ */
+int mgs_client_add(struct obd_device *obd, struct obd_export *exp,
+ void *localdata)
+{
+ return 0;
+}
+
+/* Remove client export data from the MGS */
+int mgs_client_free(struct obd_export *exp)
+{
+ return 0;
+}
+
+/* Same as mds_lvfs_fid2dentry */
/* Look up an entry by inode number. */
/* this function ONLY returns valid dget'd dentries with an initialized inode
or errors */
-static struct dentry *mgs_fid2dentry(struct mgs_obd *mgs, struct ll_fid *fid)
+static struct dentry *mgs_lvfs_fid2dentry(__u64 id, __u32 gen,
+ __u64 gr, void *data)
{
- char fid_name[32];
- unsigned long ino = fid->id;
- __u32 generation = fid->generation;
- struct inode *inode;
- struct dentry *result;
+ struct fsfilt_fid fid;
+ struct obd_device *obd = (struct obd_device *)data;
+ ENTRY;
CDEBUG(D_DENTRY, "--> mgs_fid2dentry: ino/gen %lu/%u, sb %p\n",
- ino, generation, mgs->mgs_sb);
+ (unsigned long)id, gen, obd->u.mgs.mgs_sb);
- if (ino == 0)
+ if (id == 0)
RETURN(ERR_PTR(-ESTALE));
-
- snprintf(fid_name, sizeof(fid_name), "0x%lx", ino);
-
- /* under ext3 this is neither supposed to return bad inodes
- nor NULL inodes. */
- result = ll_lookup_one_len(fid_name, mgs->mgs_fid_de, strlen(fid_name));
- if (IS_ERR(result))
- RETURN(result);
-
- inode = result->d_inode;
- if (!inode)
- RETURN(ERR_PTR(-ENOENT));
-
- if (inode->i_generation == 0 || inode->i_nlink == 0) {
- LCONSOLE_WARN("Found inode with zero generation or link -- this"
- " may indicate disk corruption (inode: %lu, link:"
- " %lu, count: %d)\n", inode->i_ino,
- (unsigned long)inode->i_nlink,
- atomic_read(&inode->i_count));
- l_dput(result);
- RETURN(ERR_PTR(-ENOENT));
- }
- if (generation && inode->i_generation != generation) {
- /* we didn't find the right inode.. */
- CDEBUG(D_INODE, "found wrong generation: inode %lu, link: %lu, "
- "count: %d, generation %u/%u\n", inode->i_ino,
- (unsigned long)inode->i_nlink,
- atomic_read(&inode->i_count), inode->i_generation,
- generation);
- l_dput(result);
- RETURN(ERR_PTR(-ENOENT));
- }
+ fid.ino = id;
+ fid.gen = gen;
- RETURN(result);
-}
-
-static struct dentry *mgs_lvfs_fid2dentry(__u64 id, __u32 gen, __u64 gr,
- void *data)
-{
- struct obd_device *obd = data;
- struct ll_fid fid;
- fid.id = id;
- fid.generation = gen;
- return mgs_fid2dentry(&obd->u.mgs, &fid);
+ RETURN(fsfilt_fid2dentry(obd, obd->u.mgs.mgs_vfsmnt, &fid, 0));
}
struct lvfs_callback_ops mgs_lvfs_ops = {
int mgs_fs_setup(struct obd_device *obd, struct vfsmount *mnt)
{
- struct mgs_obd *mgs = &obd->u.mgs;
+ struct mgs_device *mgs = &obd->u.mgs;
struct lvfs_run_ctxt saved;
struct dentry *dentry;
int rc;
ENTRY;
/* FIXME what's this? Do I need it? */
- rc = cleanup_group_info();
+ rc = cfs_cleanup_group_info();
if (rc)
RETURN(rc);
mgs->mgs_vfsmnt = mnt;
mgs->mgs_sb = mnt->mnt_root->d_inode->i_sb;
- fsfilt_setup(obd, mgs->mgs_sb);
+ rc = fsfilt_setup(obd, mgs->mgs_sb);
+ if (rc)
+ RETURN(rc);
OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
obd->obd_lvfs_ctxt.pwdmnt = mnt;
push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
/* Setup the configs dir */
- dentry = simple_mkdir(current->fs->pwd, MOUNT_CONFIGS_DIR, 0777, 1);
+ dentry = simple_mkdir(cfs_fs_pwd(current->fs), mnt, MOUNT_CONFIGS_DIR, 0777, 1);
if (IS_ERR(dentry)) {
rc = PTR_ERR(dentry);
- CERROR("cannot create %s directory: rc = %d\n",
+ CERROR("cannot create %s directory: rc = %d\n",
MOUNT_CONFIGS_DIR, rc);
GOTO(err_pop, rc);
}
mgs->mgs_configs_dir = dentry;
- /* Need the iopen dir for fid2dentry, required by
- LLOG_ORIGIN_HANDLE_READ_HEADER */
- dentry = lookup_one_len("__iopen__", current->fs->pwd,
- strlen("__iopen__"));
+ /* create directory to store nid table versions */
+ dentry = simple_mkdir(cfs_fs_pwd(current->fs), mnt, MGS_NIDTBL_DIR,
+ 0777, 1);
if (IS_ERR(dentry)) {
rc = PTR_ERR(dentry);
- CERROR("cannot lookup __iopen__ directory: rc = %d\n", rc);
- GOTO(err_configs, rc);
- }
- mgs->mgs_fid_de = dentry;
- if (!dentry->d_inode || is_bad_inode(dentry->d_inode)) {
- rc = -ENOENT;
- CERROR("__iopen__ directory has no inode? rc = %d\n", rc);
- GOTO(err_fid, rc);
+ CERROR("cannot create %s directory: rc = %d\n",
+ MOUNT_CONFIGS_DIR, rc);
+ GOTO(err_pop, rc);
+ } else {
+ dput(dentry);
}
err_pop:
pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
return rc;
-err_fid:
- dput(mgs->mgs_fid_de);
-err_configs:
- dput(mgs->mgs_configs_dir);
- goto err_pop;
}
int mgs_fs_cleanup(struct obd_device *obd)
{
- struct mgs_obd *mgs = &obd->u.mgs;
+ struct mgs_device *mgs = &obd->u.mgs;
struct lvfs_run_ctxt saved;
int rc = 0;
push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
if (mgs->mgs_configs_dir) {
- /*CERROR("configs dir dcount=%d\n",
- atomic_read(&mgs->mgs_configs_dir->d_count));*/
l_dput(mgs->mgs_configs_dir);
mgs->mgs_configs_dir = NULL;
}
- shrink_dcache_parent(mgs->mgs_fid_de);
- /*CERROR("fid dir dcount=%d\n",
- atomic_read(&mgs->mgs_fid_de->d_count));*/
- dput(mgs->mgs_fid_de);
+ shrink_dcache_sb(mgs->mgs_sb);
pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff