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[Qemu-devel] [PATCH v3 2/8] raw-format: add bdrv_measure() support
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PATCH v3 2/8] raw-format: add bdrv_measure() support |
Date: |
Wed, 22 Mar 2017 11:16:02 +0000 |
Maximum size calculation is trivial for the raw format: it's just the
requested image size (because there is no metadata).
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
block/raw-format.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/block/raw-format.c b/block/raw-format.c
index 86fbc65..e66ba00 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -312,6 +312,27 @@ static int64_t raw_getlength(BlockDriverState *bs)
return s->size;
}
+static void raw_measure(QemuOpts *opts, BlockDriverState *in_bs,
+ BlockMeasureInfo *info,
+ Error **errp)
+{
+ if (in_bs) {
+ int64_t ssize = bdrv_getlength(in_bs);
+ if (ssize < 0) {
+ error_setg_errno(errp, -ssize, "Unable to get image size");
+ return;
+ }
+ info->required = ssize;
+ } else {
+ info->required =
+ ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
+ BDRV_SECTOR_SIZE);
+ }
+
+ /* Unallocated sectors count towards the file size in raw images */
+ info->fully_allocated = info->required;
+}
+
static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
return bdrv_get_info(bs->file->bs, bdi);
@@ -477,6 +498,7 @@ BlockDriver bdrv_raw = {
.bdrv_truncate = &raw_truncate,
.bdrv_getlength = &raw_getlength,
.has_variable_length = true,
+ .bdrv_measure = &raw_measure,
.bdrv_get_info = &raw_get_info,
.bdrv_refresh_limits = &raw_refresh_limits,
.bdrv_probe_blocksizes = &raw_probe_blocksizes,
--
2.9.3
- [Qemu-devel] [PATCH v3 0/8] qemu-img: add measure sub-command, Stefan Hajnoczi, 2017/03/22
- [Qemu-devel] [PATCH v3 2/8] raw-format: add bdrv_measure() support,
Stefan Hajnoczi <=
- [Qemu-devel] [PATCH v3 3/8] qcow2: extract preallocation calculation function, Stefan Hajnoczi, 2017/03/22
- [Qemu-devel] [PATCH v3 4/8] qcow2: extract image creation option parsing, Stefan Hajnoczi, 2017/03/22
- [Qemu-devel] [PATCH v3 5/8] qcow2: add bdrv_measure() support, Stefan Hajnoczi, 2017/03/22
- [Qemu-devel] [PATCH v3 1/8] block: add bdrv_measure() API, Stefan Hajnoczi, 2017/03/22
- [Qemu-devel] [PATCH v3 6/8] qemu-img: add measure subcommand, Stefan Hajnoczi, 2017/03/22
- [Qemu-devel] [PATCH v3 7/8] qemu-iotests: support per-format golden output files, Stefan Hajnoczi, 2017/03/22