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author | John Snow <jsnow@redhat.com> | 2015-04-17 19:49:59 -0400 |
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committer | Kevin Wolf <kwolf@redhat.com> | 2015-04-28 15:36:10 +0200 |
commit | e74e6b78e6fe0c9ee426d1278fff45f5fa0af766 (patch) | |
tree | 7e076da8b90218a37041d5ec59bc3c747abd7a7b /blockdev.c | |
parent | d58d84539784d27c826924a79d9436178b07ff69 (diff) | |
download | qemu-e74e6b78e6fe0c9ee426d1278fff45f5fa0af766.zip qemu-e74e6b78e6fe0c9ee426d1278fff45f5fa0af766.tar.gz qemu-e74e6b78e6fe0c9ee426d1278fff45f5fa0af766.tar.bz2 |
qmp: add block-dirty-bitmap-clear
Add bdrv_clear_dirty_bitmap and a matching QMP command,
qmp_block_dirty_bitmap_clear that enables a user to reset
the bitmap attached to a drive.
This allows us to reset a bitmap in the event of a full
drive backup.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1429314609-29776-12-git-send-email-jsnow@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'blockdev.c')
-rw-r--r-- | blockdev.c | 34 |
1 files changed, 34 insertions, 0 deletions
@@ -2079,6 +2079,40 @@ void qmp_block_dirty_bitmap_remove(const char *node, const char *name, aio_context_release(aio_context); } +/** + * Completely clear a bitmap, for the purposes of synchronizing a bitmap + * immediately after a full backup operation. + */ +void qmp_block_dirty_bitmap_clear(const char *node, const char *name, + Error **errp) +{ + AioContext *aio_context; + BdrvDirtyBitmap *bitmap; + BlockDriverState *bs; + + bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp); + if (!bitmap || !bs) { + return; + } + + if (bdrv_dirty_bitmap_frozen(bitmap)) { + error_setg(errp, + "Bitmap '%s' is currently frozen and cannot be modified", + name); + goto out; + } else if (!bdrv_dirty_bitmap_enabled(bitmap)) { + error_setg(errp, + "Bitmap '%s' is currently disabled and cannot be cleared", + name); + goto out; + } + + bdrv_clear_dirty_bitmap(bitmap); + + out: + aio_context_release(aio_context); +} + int hmp_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) { const char *id = qdict_get_str(qdict, "id"); |