From patchwork Tue May 24 18:51:18 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [v4,4/4] rbd: Add bdrv_truncate implementation From: Josh Durgin X-Patchwork-Id: 97204 Message-Id: <1306263078-18089-5-git-send-email-josh.durgin@dreamhost.com> To: kvm@vger.kernel.org, qemu-devel@nongnu.org Cc: Kevin Wolf , ceph-devel@vger.kernel.org, Christian Brunner Date: Tue, 24 May 2011 11:51:18 -0700 Signed-off-by: Josh Durgin Reviewed-by: Christian Brunner --- block/rbd.c | 15 +++++++++++++++ 1 files changed, 15 insertions(+), 0 deletions(-) diff --git a/block/rbd.c b/block/rbd.c index c9f32e4..015ae8e 100644 --- a/block/rbd.c +++ b/block/rbd.c @@ -687,6 +687,20 @@ static int64_t qemu_rbd_getlength(BlockDriverState *bs) return info.size; } +static int qemu_rbd_truncate(BlockDriverState *bs, int64_t offset) +{ + BDRVRBDState *s = bs->opaque; + int r; + + r = rbd_resize(s->image, offset); + if (r < 0) { + error_report("failed to resize rbd image"); + return -EIO; + } + + return 0; +} + static int qemu_rbd_snap_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info) { @@ -785,6 +799,7 @@ static BlockDriver bdrv_rbd = { .bdrv_get_info = qemu_rbd_getinfo, .create_options = qemu_rbd_create_options, .bdrv_getlength = qemu_rbd_getlength, + .bdrv_truncate = qemu_rbd_truncate, .protocol_name = "rbd", .bdrv_aio_readv = qemu_rbd_aio_readv,