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| author | Max Reitz <mreitz@redhat.com> | 2013-08-30 14:34:24 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2013-08-30 15:48:43 +0200 |
| commit | 69c98726537627e708abb8fcb33e3a2b10e40bf1 (patch) | |
| tree | 1fc42d5d5c0abf85fb00b8c36c46b7f794ba8f44 /docs | |
| parent | 449df7063815489a0b091bcb3afa9ae80ae3acbf (diff) | |
| download | qemu-69c98726537627e708abb8fcb33e3a2b10e40bf1.tar.gz | |
qcow2: Add corrupt bit
This adds an incompatible bit indicating corruption to qcow2. Any image
with this bit set may not be written to unless for repairing (and
subsequently clearing the bit if the repair has been successful).
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/specs/qcow2.txt | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/docs/specs/qcow2.txt b/docs/specs/qcow2.txt index 36a559d886..33eca360cc 100644 --- a/docs/specs/qcow2.txt +++ b/docs/specs/qcow2.txt @@ -80,7 +80,12 @@ in the description of a field. tables to repair refcounts before accessing the image. - Bits 1-63: Reserved (set to 0) + Bit 1: Corrupt bit. If this bit is set then any data + structure may be corrupt and the image must not + be written to (unless for regaining + consistency). + + Bits 2-63: Reserved (set to 0) 80 - 87: compatible_features Bitmask of compatible features. An implementation can |