--- /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) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 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 "../../include/linux/libcfs/libcfs.h"
+
+#include "../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;
+}
+
+/* Must be called under the lov_stripe_lock() */
+int lov_adjust_kms(struct obd_export *exp, struct lov_stripe_md *lsm,
+ u64 size, int shrink)
+{
+ struct lov_oinfo *loi;
+ int stripe = 0;
+ __u64 kms;
+
+ assert_spin_locked(&lsm->lsm_lock);
+ LASSERT(lsm->lsm_lock_owner == current_pid());
+
+ if (shrink) {
+ for (; stripe < lsm->lsm_stripe_count; stripe++) {
+ struct lov_oinfo *loi = lsm->lsm_oinfo[stripe];
+ kms = lov_size_to_stripe(lsm, size, stripe);
+ CDEBUG(D_INODE,
+ "stripe %d KMS %sing %llu->%llu\n",
+ stripe, kms > loi->loi_kms ? "increase":"shrink",
+ loi->loi_kms, kms);
+ loi_kms_set(loi, loi->loi_lvb.lvb_size = 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 %llu->%llu\n",
+ stripe, kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms);
+ if (kms > loi->loi_kms)
+ loi_kms_set(loi, kms);
+
+ return 0;
+}
+
+void lov_merge_attrs(struct obdo *tgt, struct obdo *src, u64 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 */
+ u64 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;
+ if (valid & OBD_MD_FLDATAVERSION)
+ tgt->o_data_version += src->o_data_version;
+ } else {
+ memcpy(tgt, src, sizeof(*tgt));
+ tgt->o_oi = lsm->lsm_oi;
+ if (valid & OBD_MD_FLSIZE)
+ tgt->o_size = lov_stripe_size(lsm, src->o_size,
+ stripeno);
+ }
+
+ /* data_version needs to be valid on all stripes to be correct! */
+ if (!(valid & OBD_MD_FLDATAVERSION))
+ tgt->o_valid &= ~OBD_MD_FLDATAVERSION;
+
+ *set += 1;
+}
Code Review / kvmfornfv.git / blobdiff