mds_log.c

lustre 1.6.5 source code

/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
 * vim:expandtab:shiftwidth=8:tabstop=8:
 *
 *  lustre/mds/mds_log.c
 *
 *  Copyright (c) 2001-2003 Cluster File Systems, Inc.
 *   Author: Peter Braam <[e-mail]>
 *   Author: Andreas Dilger <[e-mail]>
 *   Author: Phil Schwan <[e-mail]>
 *
 *   This file is part of the Lustre file system, http://www.lustre.org
 *   Lustre is a trademark of Cluster File Systems, Inc.
 *
 *   You may have signed or agreed to another license before downloading
 *   this software.  If so, you are bound by the terms and conditions
 *   of that agreement, and the following does not apply to you.  See the
 *   LICENSE file included with this distribution for more information.
 *
 *   If you did not agree to a different license, then this copy of Lustre
 *   is open source 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.
 *
 *   In either case, 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
 *   license text for more details.
 */

#define DEBUG_SUBSYSTEM S_MDS

#ifndef AUTOCONF_INCLUDED
#include <linux/config.h>
#endif
#include <linux/module.h>
#include <linux/version.h>

#include <libcfs/list.h>
#include <obd_class.h>
#include <lustre_fsfilt.h>
#include <lustre_mds.h>
#include <lustre_commit_confd.h>
#include <lustre_log.h>

#include "mds_internal.h"

static int mds_llog_origin_add(struct llog_ctxt *ctxt,
                        struct llog_rec_hdr *rec, struct lov_stripe_md *lsm,
                        struct llog_cookie *logcookies, int numcookies)
{
        struct obd_device *obd = ctxt->loc_obd;
        struct obd_device *lov_obd = obd->u.mds.mds_osc_obd;
        struct llog_ctxt *lctxt;
        int rc;
        ENTRY;

        lctxt = llog_get_context(lov_obd, ctxt->loc_idx);
        rc = llog_add(lctxt, rec, lsm, logcookies, numcookies);
        llog_ctxt_put(lctxt);

        RETURN(rc);
}

static int mds_llog_origin_connect(struct llog_ctxt *ctxt, int count,
                                   struct llog_logid *logid,
                                   struct llog_gen *gen,
                                   struct obd_uuid *uuid)
{
        struct obd_device *obd = ctxt->loc_obd;
        struct obd_device *lov_obd = obd->u.mds.mds_osc_obd;
        struct llog_ctxt *lctxt;
        int rc;
        ENTRY;

        lctxt = llog_get_context(lov_obd, ctxt->loc_idx);
        rc = llog_connect(lctxt, count, logid, gen, uuid);
        llog_ctxt_put(lctxt);
        RETURN(rc);
}

static int mds_llog_repl_cancel(struct llog_ctxt *ctxt, struct lov_stripe_md *lsm,
                          int count, struct llog_cookie *cookies, int flags)
{
        struct obd_device *obd = ctxt->loc_obd;
        struct obd_device *lov_obd = obd->u.mds.mds_osc_obd;
        struct llog_ctxt *lctxt;
        int rc;
        ENTRY;

        lctxt = llog_get_context(lov_obd, ctxt->loc_idx);
        rc = llog_cancel(lctxt, lsm, count, cookies, flags);
        llog_ctxt_put(lctxt);
        RETURN(rc);
}

int mds_log_op_unlink(struct obd_device *obd, 
                      struct lov_mds_md *lmm, int lmm_size,
                      struct llog_cookie *logcookies, int cookies_size)
{
        struct mds_obd *mds = &obd->u.mds;
        struct lov_stripe_md *lsm = NULL;
        struct llog_unlink_rec *lur;
        struct llog_ctxt *ctxt;
        int rc;
        ENTRY;

        if (IS_ERR(mds->mds_osc_obd))
                RETURN(PTR_ERR(mds->mds_osc_obd));

        rc = obd_unpackmd(mds->mds_osc_exp, &lsm, lmm, lmm_size);
        if (rc < 0)
                RETURN(rc);
        rc = obd_checkmd(mds->mds_osc_exp, obd->obd_self_export, lsm);
        if (rc)
                GOTO(out, rc);
        /* first prepare unlink log record */
        OBD_ALLOC(lur, sizeof(*lur));
        if (!lur)
                GOTO(out, rc = -ENOMEM);
        lur->lur_hdr.lrh_len = lur->lur_tail.lrt_len = sizeof(*lur);
        lur->lur_hdr.lrh_type = MDS_UNLINK_REC;

        ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
        rc = llog_add(ctxt, &lur->lur_hdr, lsm, logcookies,
                      cookies_size / sizeof(struct llog_cookie));
        llog_ctxt_put(ctxt);

        OBD_FREE(lur, sizeof(*lur));
out:
        obd_free_memmd(mds->mds_osc_exp, &lsm);
        RETURN(rc);
}

int mds_log_op_setattr(struct obd_device *obd, struct inode *inode,
                      struct lov_mds_md *lmm, int lmm_size,
                      struct llog_cookie *logcookies, int cookies_size)
{
        struct mds_obd *mds = &obd->u.mds;
        struct lov_stripe_md *lsm = NULL;
        struct llog_setattr_rec *lsr;
        struct llog_ctxt *ctxt;
        int rc;
        ENTRY;

        if (IS_ERR(mds->mds_osc_obd))
                RETURN(PTR_ERR(mds->mds_osc_obd));

        rc = obd_unpackmd(mds->mds_osc_exp, &lsm, lmm, lmm_size);
        if (rc < 0)
                RETURN(rc);

        rc = obd_checkmd(mds->mds_osc_exp, obd->obd_self_export, lsm);
        if (rc)
                GOTO(out, rc);

        OBD_ALLOC(lsr, sizeof(*lsr));
        if (!lsr)
                GOTO(out, rc = -ENOMEM);

        /* prepare setattr log record */
        lsr->lsr_hdr.lrh_len = lsr->lsr_tail.lrt_len = sizeof(*lsr);
        lsr->lsr_hdr.lrh_type = MDS_SETATTR_REC;
        lsr->lsr_uid = inode->i_uid;
        lsr->lsr_gid = inode->i_gid;

        /* write setattr log */
        ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
        rc = llog_add(ctxt, &lsr->lsr_hdr, lsm, logcookies,
                      cookies_size / sizeof(struct llog_cookie));

        llog_ctxt_put(ctxt);

        OBD_FREE(lsr, sizeof(*lsr));
 out:
        obd_free_memmd(mds->mds_osc_exp, &lsm);
        RETURN(rc);
}

static struct llog_operations mds_ost_orig_logops = {
        lop_add:        mds_llog_origin_add,
        lop_connect:    mds_llog_origin_connect,
};

static struct llog_operations mds_size_repl_logops = {
        lop_cancel:     mds_llog_repl_cancel,
};

int mds_llog_init(struct obd_device *obd, struct obd_device *tgt,
                  int count, struct llog_catid *logid, struct obd_uuid *uuid)
{
        struct obd_device *lov_obd = obd->u.mds.mds_osc_obd;
        int rc;
        ENTRY;

        rc = llog_setup(obd, LLOG_MDS_OST_ORIG_CTXT, tgt, 0, NULL,
                        &mds_ost_orig_logops);
        if (rc)
                RETURN(rc);

        rc = llog_setup(obd, LLOG_SIZE_REPL_CTXT, tgt, 0, NULL,
                        &mds_size_repl_logops);
        if (rc)
                RETURN(rc);

        rc = obd_llog_init(lov_obd, tgt, count, logid, uuid);
        if (rc)
                CERROR("lov_llog_init err %d\n", rc);

        RETURN(rc);
}

int mds_llog_finish(struct obd_device *obd, int count)
{
        struct llog_ctxt *ctxt;
        int rc = 0, rc2 = 0;
        ENTRY;

        ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
        if (ctxt)
                rc = llog_cleanup(ctxt);

        ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
        if (ctxt)
                rc2 = llog_cleanup(ctxt);
        if (!rc)
                rc = rc2;

        RETURN(rc);
}