diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2012-01-18 14:40:53 +0000 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2012-01-26 14:49:18 +0100 |
| commit | c8c3080f4a6fbbf3c9c5d6efd1b49e7ca6479d1e (patch) | |
| tree | b034c08322e2c0f1d7bcbf752ff8c123b7a68213 /blockdev.c | |
| parent | 019b8cbf76fc3126d300c401acca3102c69e7876 (diff) | |
block: add support for partial streaming
Add support for streaming data from an intermediate section of the
image chain (see patch and documentation for details).
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'blockdev.c')
| -rw-r--r-- | blockdev.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/blockdev.c b/blockdev.c index 2fa01516f9..7e4c548426 100644 --- a/blockdev.c +++ b/blockdev.c @@ -973,6 +973,7 @@ void qmp_block_stream(const char *device, bool has_base, const char *base, Error **errp) { BlockDriverState *bs; + BlockDriverState *base_bs = NULL; int ret; bs = bdrv_find(device); @@ -981,13 +982,15 @@ void qmp_block_stream(const char *device, bool has_base, return; } - /* Base device not supported */ if (base) { - error_set(errp, QERR_NOT_SUPPORTED); - return; + base_bs = bdrv_find_backing_image(bs, base); + if (base_bs == NULL) { + error_set(errp, QERR_BASE_NOT_FOUND, base); + return; + } } - ret = stream_start(bs, NULL, block_stream_cb, bs); + ret = stream_start(bs, base_bs, base, block_stream_cb, bs); if (ret < 0) { switch (ret) { case -EBUSY: |