| Message ID | 1348756198-10845-2-git-send-email-benoit@irqsave.net |
|---|---|
| State | New |
| Headers | show |
On 09/27/2012 08:29 AM, Benoît Canet wrote: > --- > docs/specs/qcow2.txt | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/docs/specs/qcow2.txt b/docs/specs/qcow2.txt > index 36a559d..e8bc189 100644 > --- a/docs/specs/qcow2.txt > +++ b/docs/specs/qcow2.txt > @@ -80,7 +80,10 @@ in the description of a field. > tables to repair refcounts before accessing the > image. > > - Bits 1-63: Reserved (set to 0) > + Bit 1: Deduplication bit. If this bit is set then > + deduplication is used on this image. > + > + Bits 2-63: Reserved (set to 0) > > 80 - 87: compatible_features > Bitmask of compatible features. An implementation can > @@ -116,6 +119,7 @@ be stored. Each extension has a structure like the following: > 0x00000000 - End of the header extension area > 0xE2792ACA - Backing file format name > 0x6803f857 - Feature name table > + 0xCD8E819B - Deduplication table offset and length Missing a description of what this looks like (see the section on '== Feature name table ==' for comparison).
diff --git a/docs/specs/qcow2.txt b/docs/specs/qcow2.txt index 36a559d..e8bc189 100644 --- a/docs/specs/qcow2.txt +++ b/docs/specs/qcow2.txt @@ -80,7 +80,10 @@ in the description of a field. tables to repair refcounts before accessing the image. - Bits 1-63: Reserved (set to 0) + Bit 1: Deduplication bit. If this bit is set then + deduplication is used on this image. + + Bits 2-63: Reserved (set to 0) 80 - 87: compatible_features Bitmask of compatible features. An implementation can @@ -116,6 +119,7 @@ be stored. Each extension has a structure like the following: 0x00000000 - End of the header extension area 0xE2792ACA - Backing file format name 0x6803f857 - Feature name table + 0xCD8E819B - Deduplication table offset and length other - Unknown header extension, can be safely ignored