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>
diff --git a/qemu-img.c b/qemu-img.c
index 54137a4..b205e98 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -1024,35 +1024,6 @@
return 0;
}
-#ifdef _WIN32
-static int64_t get_allocated_file_size(const char *filename)
-{
- typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high);
- get_compressed_t get_compressed;
- struct _stati64 st;
-
- /* WinNT support GetCompressedFileSize to determine allocate size */
- get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA");
- if (get_compressed) {
- DWORD high, low;
- low = get_compressed(filename, &high);
- if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR)
- return (((int64_t) high) << 32) + low;
- }
-
- if (_stati64(filename, &st) < 0)
- return -1;
- return st.st_size;
-}
-#else
-static int64_t get_allocated_file_size(const char *filename)
-{
- struct stat st;
- if (stat(filename, &st) < 0)
- return -1;
- return (int64_t)st.st_blocks * 512;
-}
-#endif
static void dump_snapshots(BlockDriverState *bs)
{
@@ -1112,7 +1083,7 @@
bdrv_get_format(bs, fmt_name, sizeof(fmt_name));
bdrv_get_geometry(bs, &total_sectors);
get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512);
- allocated_size = get_allocated_file_size(filename);
+ allocated_size = bdrv_get_allocated_file_size(bs);
if (allocated_size < 0) {
snprintf(dsize_buf, sizeof(dsize_buf), "unavailable");
} else {