| Message ID | 20200410121816.8334-1-berto@igalia.com |
|---|---|
| State | New |
| Headers | show |
| Series | [for-5.0] qcow2: Add incompatibility note between backing files and raw external data files | expand |
On 4/10/20 7:18 AM, Alberto Garcia wrote: > 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 <eblake@redhat.com> > Signed-off-by: Alberto Garcia <berto@igalia.com> > --- > 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 > Reviewed-by: Eric Blake <eblake@redhat.com>
Am 10.04.2020 um 14:18 hat Alberto Garcia geschrieben: > 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 <eblake@redhat.com> > Signed-off-by: Alberto Garcia <berto@igalia.com> Thanks, applied to the block branch. I don't think this is critical for 5.0, so if I make a pull request for other reasons, I'll include it, but if you agree, I won't send one just for this patch. Kevin
On Tue 14 Apr 2020 05:31:26 PM CEST, Kevin Wolf <kwolf@redhat.com> wrote: > I don't think this is critical for 5.0, so if I make a pull request > for other reasons, I'll include it, but if you agree, I won't send one > just for this patch. Sure, no problem. Berto
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
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 <eblake@redhat.com> Signed-off-by: Alberto Garcia <berto@igalia.com> --- docs/interop/qcow2.txt | 3 +++ 1 file changed, 3 insertions(+)