diff options
| author | Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> | 2010-12-06 16:08:03 +0000 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2010-12-17 16:11:04 +0100 |
| commit | 01979a98d75b49c2acbbbb71521c285f8d8f9fb7 (patch) | |
| tree | b1dad24f2fc22b73bcf71f58b554715356725033 /block/qed.h | |
| parent | eabba580e6bb8d6b969c1368c6f90d72b4cde4f4 (diff) | |
| download | qemu-01979a98d75b49c2acbbbb71521c285f8d8f9fb7.tar.gz | |
qed: Consistency check support
This patch adds support for the qemu-img check command. It also
introduces a dirty bit in the qed header to mark modified images as
needing a check. This bit is cleared when the image file is closed
cleanly.
If an image file is opened and it has the dirty bit set, a consistency
check will run and try to fix corrupted table offsets. These
corruptions may occur if there is power loss while an allocating write
is performed. Once the image is fixed it opens as normal again.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/qed.h')
| -rw-r--r-- | block/qed.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/block/qed.h b/block/qed.h index 046a4102c0..2925e37b1c 100644 --- a/block/qed.h +++ b/block/qed.h @@ -50,11 +50,15 @@ enum { /* The image supports a backing file */ QED_F_BACKING_FILE = 0x01, + /* The image needs a consistency check before use */ + QED_F_NEED_CHECK = 0x02, + /* The backing file format must not be probed, treat as raw image */ QED_F_BACKING_FORMAT_NO_PROBE = 0x04, /* Feature bits must be used when the on-disk format changes */ QED_FEATURE_MASK = QED_F_BACKING_FILE | /* supported feature bits */ + QED_F_NEED_CHECK | QED_F_BACKING_FORMAT_NO_PROBE, QED_COMPAT_FEATURE_MASK = 0, /* supported compat feature bits */ QED_AUTOCLEAR_FEATURE_MASK = 0, /* supported autoclear feature bits */ |