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/*
* 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.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2012, 2015, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*/
#define DEBUG_SUBSYSTEM S_LOV
#include <linux/libcfs/libcfs.h>
#include <obd_class.h>
#include "lov_internal.h"
/** Merge the lock value block(&lvb) attributes and KMS from each of the
* stripes in a file into a single lvb. It is expected that the caller
* initializes the current atime, mtime, ctime to avoid regressing a more
* uptodate time on the local client.
*/
int lov_merge_lvb_kms(struct lov_stripe_md *lsm,
struct ost_lvb *lvb, __u64 *kms_place)
{
__u64 size = 0;
__u64 kms = 0;
__u64 blocks = 0;
s64 current_mtime = lvb->lvb_mtime;
s64 current_atime = lvb->lvb_atime;
s64 current_ctime = lvb->lvb_ctime;
int i;
int rc = 0;
assert_spin_locked(&lsm->lsm_lock);
LASSERT(lsm->lsm_lock_owner == current_pid());
CDEBUG(D_INODE, "MDT ID " DOSTID " initial value: s=%llu m=%llu a=%llu c=%llu b=%llu\n",
POSTID(&lsm->lsm_oi), lvb->lvb_size, lvb->lvb_mtime,
lvb->lvb_atime, lvb->lvb_ctime, lvb->lvb_blocks);
for (i = 0; i < lsm->lsm_stripe_count; i++) {
struct lov_oinfo *loi = lsm->lsm_oinfo[i];
u64 lov_size, tmpsize;
if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks)) {
rc = OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks);
continue;
}
tmpsize = loi->loi_kms;
lov_size = lov_stripe_size(lsm, tmpsize, i);
if (lov_size > kms)
kms = lov_size;
if (loi->loi_lvb.lvb_size > tmpsize)
tmpsize = loi->loi_lvb.lvb_size;
lov_size = lov_stripe_size(lsm, tmpsize, i);
if (lov_size > size)
size = lov_size;
/* merge blocks, mtime, atime */
blocks += loi->loi_lvb.lvb_blocks;
if (loi->loi_lvb.lvb_mtime > current_mtime)
current_mtime = loi->loi_lvb.lvb_mtime;
if (loi->loi_lvb.lvb_atime > current_atime)
current_atime = loi->loi_lvb.lvb_atime;
if (loi->loi_lvb.lvb_ctime > current_ctime)
current_ctime = loi->loi_lvb.lvb_ctime;
CDEBUG(D_INODE, "MDT ID " DOSTID " on OST[%u]: s=%llu m=%llu a=%llu c=%llu b=%llu\n",
POSTID(&lsm->lsm_oi), loi->loi_ost_idx,
loi->loi_lvb.lvb_size, loi->loi_lvb.lvb_mtime,
loi->loi_lvb.lvb_atime, loi->loi_lvb.lvb_ctime,
loi->loi_lvb.lvb_blocks);
}
*kms_place = kms;
lvb->lvb_size = size;
lvb->lvb_blocks = blocks;
lvb->lvb_mtime = current_mtime;
lvb->lvb_atime = current_atime;
lvb->lvb_ctime = current_ctime;
return rc;
}
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