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[Qemu-devel] [PATCH v3 05/29] block: Detect unaligned length in bdrv_qio
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH v3 05/29] block: Detect unaligned length in bdrv_qiov_is_aligned() |
Date: |
Fri, 17 Jan 2014 15:14:55 +0100 |
For an O_DIRECT request to succeed, it's not only necessary that all
base addresses in the qiov are aligned, but also that each length in it
is aligned.
Signed-off-by: Kevin Wolf <address@hidden>
Reviewed-by: Wenchao Xia <address@hidden>
Reviewed-by: Max Reitz <address@hidden>
---
block.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/block.c b/block.c
index 9a8562d..bf9ac5f 100644
--- a/block.c
+++ b/block.c
@@ -4566,6 +4566,9 @@ bool bdrv_qiov_is_aligned(BlockDriverState *bs,
QEMUIOVector *qiov)
if ((uintptr_t) qiov->iov[i].iov_base % bs->buffer_alignment) {
return false;
}
+ if (qiov->iov[i].iov_len % bs->buffer_alignment) {
+ return false;
+ }
}
return true;
--
1.8.1.4
[Qemu-devel] [PATCH v3 02/29] block: Inherit opt_transfer_length, Kevin Wolf, 2014/01/17
[Qemu-devel] [PATCH v3 03/29] block: Update BlockLimits when they might have changed, Kevin Wolf, 2014/01/17
[Qemu-devel] [PATCH v3 04/29] qemu_memalign: Allow small alignments, Kevin Wolf, 2014/01/17
[Qemu-devel] [PATCH v3 05/29] block: Detect unaligned length in bdrv_qiov_is_aligned(),
Kevin Wolf <=
[Qemu-devel] [PATCH v3 06/29] block: Don't use guest sector size for qemu_blockalign(), Kevin Wolf, 2014/01/17
[Qemu-devel] [PATCH v3 08/29] raw: Probe required direct I/O alignment, Kevin Wolf, 2014/01/17
[Qemu-devel] [PATCH v3 09/29] block: Introduce bdrv_aligned_preadv(), Kevin Wolf, 2014/01/17
[Qemu-devel] [PATCH v3 10/29] block: Introduce bdrv_co_do_preadv(), Kevin Wolf, 2014/01/17
[Qemu-devel] [PATCH v3 07/29] block: rename buffer_alignment to guest_block_size, Kevin Wolf, 2014/01/17