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authorFam Zheng <famcool@gmail.com>2011-07-12 19:56:39 +0800
committerKevin Wolf <kwolf@redhat.com>2011-07-19 15:39:08 +0200
commit4a1d5e1fded54358ddc4d8cbd53388ca7c93499b (patch)
treee317502ecc47e7cf31ab53bbc3f4dd2c9b92c7f0 /block.c
parentae261c86aaed62e7acddafab8262a2bf286d40b7 (diff)
block: add bdrv_get_allocated_file_size() operation
qemu-img.c wants to count allocated file size of image. Previously it counts a single bs->file by 'stat' or Window API. As VMDK introduces multiple file support, the operation becomes format specific with platform specific meanwhile. The functions are moved to block/raw-{posix,win32}.c and qemu-img.c calls bdrv_get_allocated_file_size to count the bs. And also added VMDK code to count his own extents. Signed-off-by: Fam Zheng <famcool@gmail.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block.c')
-rw-r--r--block.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/block.c b/block.c
index 24a25d569..9549b9eff 100644
--- a/block.c
+++ b/block.c
@@ -1147,6 +1147,25 @@ int bdrv_truncate(BlockDriverState *bs, int64_t offset)
}
/**
+ * Length of a allocated file in bytes. Sparse files are counted by actual
+ * allocated space. Return < 0 if error or unknown.
+ */
+int64_t bdrv_get_allocated_file_size(BlockDriverState *bs)
+{
+ BlockDriver *drv = bs->drv;
+ if (!drv) {
+ return -ENOMEDIUM;
+ }
+ if (drv->bdrv_get_allocated_file_size) {
+ return drv->bdrv_get_allocated_file_size(bs);
+ }
+ if (bs->file) {
+ return bdrv_get_allocated_file_size(bs->file);
+ }
+ return -ENOTSUP;
+}
+
+/**
* Length of a file in bytes. Return < 0 if error or unknown.
*/
int64_t bdrv_getlength(BlockDriverState *bs)