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[Qemu-devel] [PATCH v3 4/4] rbd: Add bdrv_truncate implementation
From: |
Josh Durgin |
Subject: |
[Qemu-devel] [PATCH v3 4/4] rbd: Add bdrv_truncate implementation |
Date: |
Tue, 12 Apr 2011 17:45:26 -0700 |
Signed-off-by: Josh Durgin <address@hidden>
---
block/rbd.c | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/block/rbd.c b/block/rbd.c
index ac20282..4514dbd 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -686,6 +686,20 @@ 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)
{
@@ -784,6 +798,7 @@ 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,
--
1.7.2.3