Hi,
The cause of this bug is on
debian/patches/10_fix-probing-of-large-block-devices.patch so it is
Debian specific. The patch changes from using BLKGETSIZE to
BLKGETSIZE64 without correcting for the fact that BLKGETSIZE returns
the 512 byte sector size and BLKGETSIZE64 returns the byte size. This
is from /usr/include/linux/fs.h:
#define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */
#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size
in bytes (u64 *arg) */
and this is the patch:
===================================================================
--- dcfldd-1.3.4.1.orig/sizeprobe.c
+++ dcfldd-1.3.4.1/sizeprobe.c
@@ -63,9 +63,13 @@ static off_t midpoint(off_t a, off_t b,
static off_t get_dev_size(int fd, long blksize)
{
off_t num_sectors = 0;
-
- if (ioctl(fd, BLKGETSIZE, &num_sectors))
- log_info("%s: ioctl call to BLKGETSIZE failed.\n", program_name);
+
+ /*
+ * Use BLKGETSIZE64 unconditionally, since dcfldd.h #defines
_FILE_OFFSET_BITS 64
+ * and off_t is guaranteed to be large enough to hold the result.
+ */
+ if (ioctl(fd, BLKGETSIZE64, &num_sectors))
+ log_info("%s: ioctl call to BLKGETSIZE64 failed.\n", program_name);
else
return (num_sectors * 512);
}
Should be a trivial fix
Cheers,
Tim.
