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[Qemu-devel] [PATCH v7 2/9] raw-format: add bdrv_measure() support
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PATCH v7 2/9] raw-format: add bdrv_measure() support |
Date: |
Tue, 13 Jun 2017 14:33:22 +0100 |
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>
Reviewed-by: Alberto Garcia <address@hidden>
---
block/raw-format.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/block/raw-format.c b/block/raw-format.c
index 36e6503..ac7453e 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -312,6 +312,31 @@ static int64_t raw_getlength(BlockDriverState *bs)
return s->size;
}
+static BlockMeasureInfo *raw_measure(QemuOpts *opts, BlockDriverState *in_bs,
+ Error **errp)
+{
+ BlockMeasureInfo *info;
+ int64_t required;
+
+ if (in_bs) {
+ required = bdrv_getlength(in_bs);
+ if (required < 0) {
+ error_setg_errno(errp, -required, "Unable to get image size");
+ return NULL;
+ }
+ } else {
+ required = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
+ BDRV_SECTOR_SIZE);
+ }
+
+ info = g_new(BlockMeasureInfo, 1);
+ info->required = required;
+
+ /* Unallocated sectors count towards the file size in raw images */
+ info->fully_allocated = info->required;
+ return info;
+}
+
static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
return bdrv_get_info(bs->file->bs, bdi);
@@ -479,6 +504,7 @@ 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,
--
2.9.4
- [Qemu-devel] [PATCH v7 0/9] qemu-img: add measure sub-command, Stefan Hajnoczi, 2017/06/13
- [Qemu-devel] [PATCH v7 1/9] block: add bdrv_measure() API, Stefan Hajnoczi, 2017/06/13
- [Qemu-devel] [PATCH v7 2/9] raw-format: add bdrv_measure() support,
Stefan Hajnoczi <=
- [Qemu-devel] [PATCH v7 3/9] qcow2: extract preallocation calculation function, Stefan Hajnoczi, 2017/06/13
- [Qemu-devel] [PATCH v7 4/9] qcow2: make refcount size calculation conservative, Stefan Hajnoczi, 2017/06/13
- [Qemu-devel] [PATCH v7 5/9] qcow2: extract image creation option parsing, Stefan Hajnoczi, 2017/06/13
- [Qemu-devel] [PATCH v7 7/9] qemu-img: add measure subcommand, Stefan Hajnoczi, 2017/06/13
- [Qemu-devel] [PATCH v7 6/9] qcow2: add bdrv_measure() support, Stefan Hajnoczi, 2017/06/13
- [Qemu-devel] [PATCH v7 8/9] qemu-iotests: support per-format golden output files, Stefan Hajnoczi, 2017/06/13
- [Qemu-devel] [PATCH v7 9/9] iotests: add test 178 for qemu-img measure, Stefan Hajnoczi, 2017/06/13
- Re: [Qemu-devel] [PATCH v7 0/9] qemu-img: add measure sub-command, no-reply, 2017/06/13