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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 /include/linux | |
| 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 'include/linux')
| -rw-r--r-- | include/linux/fd.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/fd.h b/include/linux/fd.h index f5d194af07a8..c6a68d011608 100644 --- a/include/linux/fd.h +++ b/include/linux/fd.h @@ -3,6 +3,7 @@ #include <linux/ioctl.h> #include <linux/compiler.h> +#include <linux/compat.h> /* New file layout: Now the ioctl definitions immediately follow the * definitions of the structures that they use */ @@ -377,4 +378,21 @@ struct floppy_raw_cmd { #define FDEJECT _IO(2, 0x5a) /* eject the disk */ +#ifdef CONFIG_COMPAT +struct compat_floppy_struct { + compat_uint_t size; + compat_uint_t sect; + compat_uint_t head; + compat_uint_t track; + compat_uint_t stretch; + unsigned char gap; + unsigned char rate; + unsigned char spec1; + unsigned char fmt_gap; + const compat_caddr_t name; +}; + +#define FDGETPRM32 _IOR(2, 0x04, struct compat_floppy_struct) +#endif + #endif |