+++ /dev/null
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * 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 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).
- *
- * 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
- *
- * 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.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/mds/handler.c
- *
- * Author: Peter Braam <braam@clusterfs.com>
- * Author: Andreas Dilger <adilger@clusterfs.com>
- * Author: Phil Schwan <phil@clusterfs.com>
- * Author: Mike Shaver <shaver@clusterfs.com>
- */
-
-#define DEBUG_SUBSYSTEM S_MDS
-
-#include <lustre_mds.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/jbd.h>
-#include <linux/buffer_head.h>
-#include <linux/workqueue.h>
-#include <linux/mount.h>
-
-#include <lustre_acl.h>
-#include <obd_class.h>
-#include <lustre_dlm.h>
-#include <obd_lov.h>
-#include <lustre_fsfilt.h>
-#include <lprocfs_status.h>
-#include <lustre_disk.h>
-#include <lustre_param.h>
-#include <lustre_log.h>
-
-#include "mds_internal.h"
-
-__u32 mds_max_ost_index=0xFFFF;
-CFS_MODULE_PARM(mds_max_ost_index, "i", int, 0444,
- "maximal OST index");
-
-static int mds_lov_presetup (struct mds_obd *mds, struct lustre_cfg *lcfg)
-{
- int rc = 0;
- ENTRY;
-
- if (lcfg->lcfg_bufcount >= 4 && LUSTRE_CFG_BUFLEN(lcfg, 3) > 0) {
- class_uuid_t uuid;
-
- ll_generate_random_uuid(uuid);
- class_uuid_unparse(uuid, &mds->mds_lov_uuid);
-
- OBD_ALLOC(mds->mds_profile, LUSTRE_CFG_BUFLEN(lcfg, 3));
- if (mds->mds_profile == NULL)
- RETURN(-ENOMEM);
-
- strncpy(mds->mds_profile, lustre_cfg_string(lcfg, 3),
- LUSTRE_CFG_BUFLEN(lcfg, 3));
- }
- RETURN(rc);
-}
-
-static int mds_lov_clean(struct obd_device *obd)
-{
- struct mds_obd *mds = &obd->u.mds;
- struct obd_device *osc = mds->mds_lov_obd;
- ENTRY;
-
- if (mds->mds_profile) {
- class_del_profile(mds->mds_profile);
- OBD_FREE(mds->mds_profile, strlen(mds->mds_profile) + 1);
- mds->mds_profile = NULL;
- }
-
- /* There better be a lov */
- if (!osc)
- RETURN(0);
- if (IS_ERR(osc))
- RETURN(PTR_ERR(osc));
-
- obd_register_observer(osc, NULL);
-
- /* Give lov our same shutdown flags */
- osc->obd_force = obd->obd_force;
- osc->obd_fail = obd->obd_fail;
-
- /* Cleanup the lov */
- obd_disconnect(mds->mds_lov_exp);
- class_manual_cleanup(osc);
-
- RETURN(0);
-}
-
-static int mds_postsetup(struct obd_device *obd)
-{
- struct mds_obd *mds = &obd->u.mds;
- struct llog_ctxt *ctxt;
- int rc = 0;
- ENTRY;
-
- rc = llog_setup(NULL, obd, &obd->obd_olg, LLOG_CONFIG_ORIG_CTXT, obd,
- &llog_lvfs_ops);
- if (rc)
- RETURN(rc);
-
- if (mds->mds_profile) {
- struct lustre_profile *lprof;
- /* The profile defines which osc and mdc to connect to, for a
- client. We reuse that here to figure out the name of the
- lov to use (and ignore lprof->lp_md).
- The profile was set in the config log with
- LCFG_MOUNTOPT profilenm oscnm mdcnm */
- lprof = class_get_profile(mds->mds_profile);
- if (lprof == NULL) {
- CERROR("No profile found: %s\n", mds->mds_profile);
- GOTO(err_cleanup, rc = -ENOENT);
- }
- rc = mds_lov_connect(obd, lprof->lp_dt);
- if (rc)
- GOTO(err_cleanup, rc);
- }
-
- RETURN(rc);
-
-err_cleanup:
- mds_lov_clean(obd);
- ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
- if (ctxt)
- llog_cleanup(NULL, ctxt);
- return rc;
-}
-
-int mds_postrecov(struct obd_device *obd)
-{
- int rc = 0;
- ENTRY;
-
- if (obd->obd_fail)
- RETURN(0);
-
- LASSERT(!obd->obd_recovering);
- /* clean PENDING dir */
-#if 0
- if (strncmp(obd->obd_name, MDD_OBD_NAME, strlen(MDD_OBD_NAME)))
- rc = mds_cleanup_pending(obd);
- if (rc < 0)
- GOTO(out, rc);
-#endif
- /* FIXME Does target_finish_recovery really need this to block? */
- /* Notify the LOV, which will in turn call mds_notify for each tgt */
- /* This means that we have to hack obd_notify to think we're obd_set_up
- during mds_lov_connect. */
- obd_notify(obd->u.mds.mds_lov_obd, NULL,
- obd->obd_async_recov ? OBD_NOTIFY_SYNC_NONBLOCK :
- OBD_NOTIFY_SYNC, NULL);
-
- RETURN(rc);
-}
-
-/* We need to be able to stop an mds_lov_synchronize */
-static int mds_lov_early_clean(struct obd_device *obd)
-{
- struct mds_obd *mds = &obd->u.mds;
- struct obd_device *osc = mds->mds_lov_obd;
-
- if (!osc || (!obd->obd_force && !obd->obd_fail))
- return(0);
-
- CDEBUG(D_HA, "abort inflight\n");
- return (obd_precleanup(osc, OBD_CLEANUP_EARLY));
-}
-
-static int mds_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
-{
- struct mds_obd *mds = &obd->u.mds;
- struct llog_ctxt *ctxt;
- int rc = 0;
- ENTRY;
-
- switch (stage) {
- case OBD_CLEANUP_EARLY:
- break;
- case OBD_CLEANUP_EXPORTS:
- mds_lov_early_clean(obd);
- cfs_down_write(&mds->mds_notify_lock);
- mds_lov_disconnect(obd);
- mds_lov_clean(obd);
- ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
- if (ctxt)
- llog_cleanup(NULL, ctxt);
- rc = obd_llog_finish(obd, 0);
- mds->mds_lov_exp = NULL;
- cfs_up_write(&mds->mds_notify_lock);
- break;
- }
- RETURN(rc);
-}
-
-/* Look up an entry by inode number. */
-/* this function ONLY returns valid dget'd dentries with an initialized inode
- or errors */
-static struct dentry *mds_lvfs_fid2dentry(__u64 id, __u32 gen, __u64 gr,
- void *data)
-{
- struct fsfilt_fid fid;
- struct obd_device *obd = (struct obd_device *)data;
-
- if (id == 0)
- RETURN(ERR_PTR(-ESTALE));
-
- fid.ino = id;
- fid.gen = gen;
-
- RETURN(fsfilt_fid2dentry(obd, obd->u.mds.mds_obt.obt_vfsmnt, &fid, 0));
-}
-
-
-struct lvfs_callback_ops mds_lvfs_ops = {
- l_fid2dentry: mds_lvfs_fid2dentry,
-};
-
-static int mds_init_ctxt(struct obd_device *obd, struct vfsmount *mnt)
-{
- struct mds_obd *mds = &obd->u.mds;
- int rc;
-
- mds->mds_obt.obt_vfsmnt = mnt;
- /* why not mnt->mnt_sb instead of mnt->mnt_root->d_inode->i_sb? */
- obd->u.obt.obt_sb = mnt->mnt_root->d_inode->i_sb;
- obd->u.obt.obt_magic = OBT_MAGIC;
- rc = fsfilt_setup(obd, obd->u.obt.obt_sb);
- if (rc)
- return rc;
-
- OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
- obd->obd_lvfs_ctxt.pwdmnt = mnt;
- obd->obd_lvfs_ctxt.pwd = mnt->mnt_root;
- obd->obd_lvfs_ctxt.fs = get_ds();
- obd->obd_lvfs_ctxt.cb_ops = mds_lvfs_ops;
- return 0;
-}
-
-/*mds still need lov setup here*/
-static int mds_cmd_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
-{
- struct mds_obd *mds = &obd->u.mds;
- struct lvfs_run_ctxt saved;
- const char *dev;
- struct vfsmount *mnt;
- struct lustre_sb_info *lsi;
- struct lustre_mount_info *lmi;
- struct dentry *dentry;
- int rc = 0;
- ENTRY;
-
- CDEBUG(D_INFO, "obd %s setup \n", obd->obd_name);
- if (strncmp(obd->obd_name, MDD_OBD_NAME, strlen(MDD_OBD_NAME)))
- RETURN(0);
-
- if (lcfg->lcfg_bufcount < 5) {
- CERROR("invalid arg for setup %s\n", MDD_OBD_NAME);
- RETURN(-EINVAL);
- }
- dev = lustre_cfg_string(lcfg, 4);
- lmi = server_get_mount(dev);
- LASSERT(lmi != NULL);
-
- lsi = s2lsi(lmi->lmi_sb);
- mnt = lmi->lmi_mnt;
- /* FIXME: MDD LOV initialize objects.
- * we need only lmi here but not get mount
- * OSD did mount already, so put mount back
- */
- cfs_atomic_dec(&lsi->lsi_mounts);
- cfs_init_rwsem(&mds->mds_notify_lock);
-
- obd->obd_fsops = fsfilt_get_ops(lsi->lsi_fstype);
- rc = mds_init_ctxt(obd, mnt);
- if (rc)
- GOTO(err_putfs, rc);
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- dentry = simple_mkdir(cfs_fs_pwd(current->fs), mnt, "OBJECTS", 0777, 1);
- if (IS_ERR(dentry)) {
- rc = PTR_ERR(dentry);
- CERROR("cannot create OBJECTS directory: rc = %d\n", rc);
- GOTO(err_pop, rc);
- }
- mds->mds_objects_dir = dentry;
-
- rc = mds_lov_init_objids(obd);
- if (rc != 0) {
- CERROR("cannot init lov objid rc = %d\n", rc);
- GOTO(err_objects, rc );
- }
-
- rc = mds_lov_presetup(mds, lcfg);
- if (rc < 0)
- GOTO(err_objects, rc);
-
- /* Don't wait for mds_postrecov trying to clear orphans */
- obd->obd_async_recov = 1;
- rc = mds_postsetup(obd);
- /* Bug 11557 - allow async abort_recov start
- FIXME can remove most of this obd_async_recov plumbing
- obd->obd_async_recov = 0;
- */
-
- if (rc)
- GOTO(err_objects, rc);
-
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- RETURN(0);
-
-err_objects:
- dput(mds->mds_objects_dir);
-err_pop:
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
-err_putfs:
- fsfilt_put_ops(obd->obd_fsops);
- return rc;
-}
-
-static int mds_cmd_cleanup(struct obd_device *obd)
-{
- struct mds_obd *mds = &obd->u.mds;
- struct lvfs_run_ctxt saved;
- int rc = 0;
- ENTRY;
-
- mds->mds_lov_exp = NULL;
-
- if (obd->obd_fail)
- LCONSOLE_WARN("%s: shutting down for failover; client state "
- "will be preserved.\n", obd->obd_name);
-
- if (strncmp(obd->obd_name, MDD_OBD_NAME, strlen(MDD_OBD_NAME)))
- RETURN(0);
-
- push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
-
- mds_lov_destroy_objids(obd);
-
- if (mds->mds_objects_dir != NULL) {
- l_dput(mds->mds_objects_dir);
- mds->mds_objects_dir = NULL;
- }
-
- shrink_dcache_sb(mds->mds_obt.obt_sb);
- fsfilt_put_ops(obd->obd_fsops);
-
- pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
- RETURN(rc);
-}
-
-#if 0
-static int mds_cmd_health_check(struct obd_device *obd)
-{
- return 0;
-}
-#endif
-static struct obd_ops mds_cmd_obd_ops = {
- .o_owner = THIS_MODULE,
- .o_setup = mds_cmd_setup,
- .o_cleanup = mds_cmd_cleanup,
- .o_precleanup = mds_precleanup,
- .o_create = mds_obd_create,
- .o_destroy = mds_obd_destroy,
- .o_llog_init = mds_llog_init,
- .o_llog_finish = mds_llog_finish,
- .o_notify = mds_notify,
- .o_postrecov = mds_postrecov,
- // .o_health_check = mds_cmd_health_check,
-};
-
-static int __init mds_cmd_init(void)
-{
- struct lprocfs_static_vars lvars;
-
- lprocfs_mds_init_vars(&lvars);
- class_register_type(&mds_cmd_obd_ops, NULL, lvars.module_vars,
- LUSTRE_MDS_NAME, NULL);
-
- return 0;
-}
-
-static void /*__exit*/ mds_cmd_exit(void)
-{
- class_unregister_type(LUSTRE_MDS_NAME);
-}
-
-MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
-MODULE_DESCRIPTION("Lustre Metadata Server (MDS)");
-MODULE_LICENSE("GPL");
-
-module_init(mds_cmd_init);
-module_exit(mds_cmd_exit);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff