From 2ebf7c4b82f7b569cb74e9641968bf4a1da25d3d Mon Sep 17 00:00:00 2001 From: Cole Robinson Date: Thu, 14 Jan 2010 11:19:41 -0500 Subject: raw-posix: Detect legacy floppy via ioctl on linux Current legacy floppy detection is hardcoded based on source file name. Make this smarter on linux by attempting a floppy specific ioctl. v2: Give ioctl check higher priority than filename check s/IDE/legacy/ v3: Actually initialize 'prio' variable Check for ioctl success rather than absence of specific failure v4: Explicitly mention that change is linux specific. Signed-off-by: Cole Robinson Signed-off-by: Anthony Liguori --- block/raw-posix.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) (limited to 'block') diff --git a/block/raw-posix.c b/block/raw-posix.c index a2c7508856..eea7e56e59 100644 --- a/block/raw-posix.c +++ b/block/raw-posix.c @@ -1055,9 +1055,26 @@ static int floppy_open(BlockDriverState *bs, const char *filename, int flags) static int floppy_probe_device(const char *filename) { + int fd, ret; + int prio = 0; + struct floppy_struct fdparam; + if (strstart(filename, "/dev/fd", NULL)) - return 100; - return 0; + prio = 50; + + fd = open(filename, O_RDONLY | O_NONBLOCK); + if (fd < 0) { + goto out; + } + + /* Attempt to detect via a floppy specific ioctl */ + ret = ioctl(fd, FDGETPRM, &fdparam); + if (ret >= 0) + prio = 100; + + close(fd); +out: + return prio; } -- cgit v1.2.3