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| author | Eric Blake <eblake@redhat.com> | 2019-01-11 13:47:20 -0600 |
|---|---|---|
| committer | Eric Blake <eblake@redhat.com> | 2019-01-14 10:09:46 -0600 |
| commit | 636192c4b6052820ea126a5287c58a8f53f3c84f (patch) | |
| tree | a84e1b6b8c3f06fd5db8e36aebcb8a0bb9e0bd86 /qemu-nbd.texi | |
| parent | 678ba275c77b5b12f3bc9bb369a1b824fc9f679f (diff) | |
qemu-nbd: Add --bitmap=NAME option
Having to fire up qemu, then use QMP commands for nbd-server-start
and nbd-server-add, just to expose a persistent dirty bitmap, is
rather tedious. Make it possible to expose a dirty bitmap using
just qemu-nbd (of course, for now this only works when qemu-nbd is
visiting a BDS formatted as qcow2).
Of course, any good feature also needs unit testing, so expand
iotest 223 to cover it.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190111194720.15671-9-eblake@redhat.com>
Diffstat (limited to 'qemu-nbd.texi')
| -rw-r--r-- | qemu-nbd.texi | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/qemu-nbd.texi b/qemu-nbd.texi index 9a84e81eed..96b1546006 100644 --- a/qemu-nbd.texi +++ b/qemu-nbd.texi @@ -45,6 +45,10 @@ auto-detecting Export the disk as read-only @item -P, --partition=@var{num} Only expose partition @var{num} +@item -B, --bitmap=@var{name} +If @var{filename} has a qcow2 persistent bitmap @var{name}, expose +that bitmap via the ``qemu:dirty-bitmap:@var{name}'' context +accessible through NBD_OPT_SET_META_CONTEXT. @item -s, --snapshot Use @var{filename} as an external snapshot, create a temporary file with backing_file=@var{filename}, redirect the write to |