| commit | 808c4b6f30d77295292cef8ee38c462957a6b9ca | |
| author | Max Reitz <mreitz@redhat.com> | |
| Fri, 24 Oct 2014 13:57:30 +0000 (24 15:57 +0200) | ||
| committer | Stefan Hajnoczi <stefanha@redhat.com> | |
| Mon, 3 Nov 2014 11:41:47 +0000 (3 11:41 +0000) | ||
| tree | 33cf36fdaca45cfee3affc1fe999085ccf6bf44e | treesnapshot (tar.gz zip) |
| parent | 70a5ff6bdd2f0d4c22e216cab921f9288cb1656e | commitdiff |
qcow2: Allow "full" discard
Normally, discarded sectors should read back as zero. However, there are
cases in which a sector (or rather cluster) should be discarded as if
they were never written in the first place, that is, reading them should
fall through to the backing file again.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 1414159063-25977-2-git-send-email-mreitz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Normally, discarded sectors should read back as zero. However, there are
cases in which a sector (or rather cluster) should be discarded as if
they were never written in the first place, that is, reading them should
fall through to the backing file again.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 1414159063-25977-2-git-send-email-mreitz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| block/qcow2-cluster.c | diffblobblamehistory | |
| block/qcow2-snapshot.c | diffblobblamehistory | |
| block/qcow2.c | diffblobblamehistory | |
| block/qcow2.h | diffblobblamehistory |