[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PULL 01/15] qcow2: Add incompatibility note between backing files and r
From: |
Kevin Wolf |
Subject: |
[PULL 01/15] qcow2: Add incompatibility note between backing files and raw external data files |
Date: |
Thu, 30 Apr 2020 17:52:17 +0200 |
From: Alberto Garcia <address@hidden>
Backing files and raw external data files are mutually exclusive.
The documentation of the raw external data bit (in autoclear_features)
already indicates that, but we should also mention it on the other
side.
Suggested-by: Eric Blake <address@hidden>
Signed-off-by: Alberto Garcia <address@hidden>
Message-Id: <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
docs/interop/qcow2.txt | 3 +++
1 file changed, 3 insertions(+)
diff --git a/docs/interop/qcow2.txt b/docs/interop/qcow2.txt
index 640e0eca40..298a031310 100644
--- a/docs/interop/qcow2.txt
+++ b/docs/interop/qcow2.txt
@@ -25,6 +25,9 @@ The first cluster of a qcow2 image contains the file header:
is stored (NB: The string is not null terminated). 0 if the
image doesn't have a backing file.
+ Note: backing files are incompatible with raw external data
+ files (auto-clear feature bit 1).
+
16 - 19: backing_file_size
Length of the backing file name in bytes. Must not be
longer than 1023 bytes. Undefined if the image doesn't have
--
2.25.3
- [PULL 00/15] Block layer patches, Kevin Wolf, 2020/04/30
- [PULL 01/15] qcow2: Add incompatibility note between backing files and raw external data files,
Kevin Wolf <=
- [PULL 02/15] qemu-iotests: allow qcow2 external discarded clusters to contain stale data, Kevin Wolf, 2020/04/30
- [PULL 03/15] block: Add flags to BlockDriver.bdrv_co_truncate(), Kevin Wolf, 2020/04/30
- [PULL 05/15] block-backend: Add flags to blk_truncate(), Kevin Wolf, 2020/04/30
- [PULL 04/15] block: Add flags to bdrv(_co)_truncate(), Kevin Wolf, 2020/04/30
- [PULL 06/15] qcow2: Support BDRV_REQ_ZERO_WRITE for truncate, Kevin Wolf, 2020/04/30
- [PULL 07/15] raw-format: Support BDRV_REQ_ZERO_WRITE for truncate, Kevin Wolf, 2020/04/30
- [PULL 08/15] file-posix: Support BDRV_REQ_ZERO_WRITE for truncate, Kevin Wolf, 2020/04/30
- [PULL 09/15] block: truncate: Don't make backing file data visible, Kevin Wolf, 2020/04/30
- [PULL 10/15] iotests: Filter testfiles out in filter_img_info(), Kevin Wolf, 2020/04/30
- [PULL 12/15] qcow2: Forward ZERO_WRITE flag for full preallocation, Kevin Wolf, 2020/04/30