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From 3015984eb6778214d381cf7de32d8ab81e277728 Mon Sep 17 00:00:00 2001
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From: Kevin Wolf <kwolf@redhat.com>
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Date: Thu, 5 Dec 2013 13:01:46 +0100
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Subject: [PATCH 07/37] block: Detect unaligned length in bdrv_qiov_is_aligned()
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Message-id: <1392117622-28812-8-git-send-email-kwolf@redhat.com>
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Patchwork-id: 57172
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O-Subject: [RHEL-7.0 qemu-kvm PATCH v2 07/37] block: Detect unaligned length in bdrv_qiov_is_aligned()
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Bugzilla: 748906
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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For an O_DIRECT request to succeed, it's not only necessary that all
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base addresses in the qiov are aligned, but also that each length in it
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is aligned.
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Reviewed-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
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Reviewed-by: Max Reitz <mreitz@redhat.com>
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(cherry picked from commit 1ff735bdc417945bc6df1857861b127644b3f461)
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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---
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block.c | 3 +++
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1 file changed, 3 insertions(+)
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---
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block.c | 3 +++
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1 files changed, 3 insertions(+), 0 deletions(-)
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diff --git a/block.c b/block.c
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index f62acbd..6c98ff7 100644
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--- a/block.c
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+++ b/block.c
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@@ -4743,6 +4743,9 @@ bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov)
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if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) {
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return false;
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}
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+ if (qiov->iov[i].iov_len % bs->buffer_alignment) {
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+ return false;
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+ }
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}
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return true;
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--
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1.7.1
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