-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * 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.
*
- * 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.
+ * 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 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.
+ * 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
*
- * 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
+ */
+/*
+ * 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.
*/
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
#define DEBUG_SUBSYSTEM S_LOV
-#ifdef __KERNEL__
-#include <asm/div64.h>
-#else
-#include <liblustre.h>
-#endif
-
-#include <linux/obd_class.h>
-#include <linux/obd_lov.h>
+#include <libcfs/libcfs.h>
+#include <obd_class.h>
#include "lov_internal.h"
-/* Merge rss if kms == 0
- *
- * Even when merging RSS, we will take the KMS value if it's larger.
- * This prevents getattr from stomping on dirty cached pages which
- * extend the file size. */
-__u64 lov_merge_size(struct lov_stripe_md *lsm, int kms)
+/** 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)
{
- struct lov_oinfo *loi;
- __u64 size = 0;
- int i;
-
- for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
- i++, loi++) {
- obd_size lov_size, tmpsize;
+ 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;
+ u64 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;
- if (kms == 0 && loi->loi_rss > tmpsize)
- tmpsize = loi->loi_rss;
+ 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);
}
- return size;
-}
-EXPORT_SYMBOL(lov_merge_size);
-
-/* Merge blocks */
-__u64 lov_merge_blocks(struct lov_stripe_md *lsm)
-{
- struct lov_oinfo *loi;
- __u64 blocks = 0;
- int i;
-
- for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++, loi++)
- blocks += loi->loi_blocks;
- return blocks;
-}
-EXPORT_SYMBOL(lov_merge_blocks);
-
-__u64 lov_merge_mtime(struct lov_stripe_md *lsm, __u64 current_time)
-{
- struct lov_oinfo *loi;
- int i;
-
- for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++, loi++)
- if (loi->loi_mtime > current_time)
- current_time = loi->loi_mtime;
- return current_time;
-}
-EXPORT_SYMBOL(lov_merge_mtime);
-
-int lov_adjust_kms(struct obd_export *exp, struct lov_stripe_md *lsm,
- obd_off size, int shrink)
-{
- struct lov_oinfo *loi;
- int stripe = 0;
- __u64 kms;
- ENTRY;
-
- if (shrink) {
- struct lov_oinfo *loi;
- int i = 0;
- for (loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
- i++, loi++) {
- kms = lov_size_to_stripe(lsm, size, i);
- loi->loi_kms = loi->loi_rss = kms;
- }
- RETURN(0);
- }
-
- if (size > 0)
- stripe = lov_stripe_number(lsm, size - 1);
- kms = lov_size_to_stripe(lsm, size, stripe);
- loi = &(lsm->lsm_oinfo[stripe]);
-
- CDEBUG(D_INODE, "stripe %d KMS %sincreasing "LPU64"->"LPU64"\n",
- stripe, kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms);
- if (kms > loi->loi_kms)
- loi->loi_kms = kms;
-
- RETURN(0);
-}
-EXPORT_SYMBOL(lov_adjust_kms);
-
-void lov_merge_attrs(struct obdo *tgt, struct obdo *src, obd_flags valid,
- struct lov_stripe_md *lsm, int stripeno, int *set)
-{
- valid &= src->o_valid;
-
- if (*set) {
- if (valid & OBD_MD_FLSIZE) {
- /* this handles sparse files properly */
- obd_size lov_size;
-
- lov_size = lov_stripe_size(lsm, src->o_size, stripeno);
- if (lov_size > tgt->o_size)
- tgt->o_size = lov_size;
- }
- if (valid & OBD_MD_FLBLOCKS)
- tgt->o_blocks += src->o_blocks;
- if (valid & OBD_MD_FLBLKSZ)
- tgt->o_blksize += src->o_blksize;
- if (valid & OBD_MD_FLCTIME && tgt->o_ctime < src->o_ctime)
- tgt->o_ctime = src->o_ctime;
- if (valid & OBD_MD_FLMTIME && tgt->o_mtime < src->o_mtime)
- tgt->o_mtime = src->o_mtime;
- } else {
- memcpy(tgt, src, sizeof(*tgt));
- tgt->o_id = lsm->lsm_object_id;
- if (valid & OBD_MD_FLSIZE)
- tgt->o_size = lov_stripe_size(lsm,src->o_size,stripeno);
- *set = 1;
- }
+ *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);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff