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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/raw-win32.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/raw-win32.c')
-rw-r--r--block/raw-win32.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/block/raw-win32.c b/block/raw-win32.c
index 56bd7195a1..91067e7595 100644
--- a/block/raw-win32.c
+++ b/block/raw-win32.c
@@ -213,6 +213,31 @@ static int64_t raw_getlength(BlockDriverState *bs)
return l.QuadPart;
}
+static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
+{
+ typedef DWORD (WINAPI * get_compressed_t)(const char *filename,
+ DWORD * high);
+ get_compressed_t get_compressed;
+ struct _stati64 st;
+ const char *filename = bs->filename;
+ /* 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;
+}
+
static int raw_create(const char *filename, QEMUOptionParameter *options)
{
int fd;
@@ -257,6 +282,8 @@ static BlockDriver bdrv_file = {
.bdrv_write = raw_write,
.bdrv_truncate = raw_truncate,
.bdrv_getlength = raw_getlength,
+ .bdrv_get_allocated_file_size
+ = raw_get_allocated_file_size,
.create_options = raw_create_options,
};
@@ -419,6 +446,8 @@ static BlockDriver bdrv_host_device = {
.bdrv_read = raw_read,
.bdrv_write = raw_write,
.bdrv_getlength = raw_getlength,
+ .bdrv_get_allocated_file_size
+ = raw_get_allocated_file_size,
};
static void bdrv_file_init(void)