From: shenmeng996 <[email protected]> fstat return block device's size of zero. use ioctl to get block device's size.
Signed-off-by: shenmeng996 <[email protected]> --- lib/io.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/lib/io.c b/lib/io.c index 93328d3..ae3ac37 100644 --- a/lib/io.c +++ b/lib/io.c @@ -9,6 +9,8 @@ #define _LARGEFILE64_SOURCE #define _GNU_SOURCE #include <sys/stat.h> +#include <sys/ioctl.h> +#include <linux/fs.h> #include "erofs/io.h" #ifdef HAVE_LINUX_FALLOC_H #include <linux/falloc.h> @@ -49,7 +51,12 @@ int dev_open(const char *dev) switch (st.st_mode & S_IFMT) { case S_IFBLK: - erofs_devsz = st.st_size; + ret = ioctl(fd, BLKGETSIZE64, &erofs_devsz); + if (ret) { + erofs_err("failed to ioctl(%s).", dev); + close(fd); + return -errno; + } break; case S_IFREG: ret = ftruncate(fd, 0); -- 1.8.3.1
