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| author | Johannes Stezenbach <js@sig21.net> | 2011-07-01 22:32:26 +0200 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2011-07-01 22:32:26 +0200 |
| commit | 390192b300570b2bc721d77067ca133f58015ae8 (patch) | |
| tree | bacbd75f23e74308b814146338bcaa6b3636bae7 /fs/compat_ioctl.c | |
| parent | 85ef06d1d252f6a2e73b678591ab71caad4667bb (diff) | |
| download | lwn-390192b300570b2bc721d77067ca133f58015ae8.tar.gz lwn-390192b300570b2bc721d77067ca133f58015ae8.zip | |
compat_ioctl: fix warning caused by qemu
On Linux x86_64 host with 32bit userspace, running
qemu or even just "qemu-img create -f qcow2 some.img 1G"
causes a kernel warning:
ioctl32(qemu-img:5296): Unknown cmd fd(3) cmd(00005326){t:'S';sz:0} arg(7fffffff) on some.img
ioctl32(qemu-img:5296): Unknown cmd fd(3) cmd(801c0204){t:02;sz:28} arg(fff77350) on some.img
ioctl 00005326 is CDROM_DRIVE_STATUS,
ioctl 801c0204 is FDGETPRM.
The warning appears because the Linux compat-ioctl handler for these
ioctls only applies to block devices, while qemu also uses the ioctls on
plain files.
Signed-off-by: Johannes Stezenbach <js@sig21.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'fs/compat_ioctl.c')
| -rw-r--r-- | fs/compat_ioctl.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index 61abb638b4bf..8be086e9abe4 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -68,6 +68,8 @@ #ifdef CONFIG_BLOCK #include <linux/loop.h> +#include <linux/cdrom.h> +#include <linux/fd.h> #include <scsi/scsi.h> #include <scsi/scsi_ioctl.h> #include <scsi/sg.h> @@ -944,6 +946,9 @@ COMPATIBLE_IOCTL(FIOQSIZE) IGNORE_IOCTL(LOOP_CLR_FD) /* md calls this on random blockdevs */ IGNORE_IOCTL(RAID_VERSION) +/* qemu/qemu-img might call these two on plain files for probing */ +IGNORE_IOCTL(CDROM_DRIVE_STATUS) +IGNORE_IOCTL(FDGETPRM32) /* SG stuff */ COMPATIBLE_IOCTL(SG_SET_TIMEOUT) COMPATIBLE_IOCTL(SG_GET_TIMEOUT) |