From 4a1d5e1fded54358ddc4d8cbd53388ca7c93499b Mon Sep 17 00:00:00 2001 From: Fam Zheng Date: Tue, 12 Jul 2011 19:56:39 +0800 Subject: 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 Reviewed-by: Stefan Hajnoczi Signed-off-by: Kevin Wolf --- block/raw-win32.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) (limited to 'block/raw-win32.c') 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) -- cgit v1.2.1