diff options
Diffstat (limited to 'block/compat_ioctl.c')
| -rw-r--r-- | block/compat_ioctl.c | 121 |
1 files changed, 120 insertions, 1 deletions
diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c index d20fdb436f68..500cc9e761c1 100644 --- a/block/compat_ioctl.c +++ b/block/compat_ioctl.c @@ -40,6 +40,122 @@ static int compat_put_u64(unsigned long arg, u64 val) #define BLKBSZSET_32 _IOW(0x12, 113, int) #define BLKGETSIZE64_32 _IOR(0x12, 114, int) +static int compat_blkdev_driver_ioctl(struct inode *inode, struct file *file, + struct gendisk *disk, unsigned cmd, unsigned long arg) +{ + int ret; + + switch (arg) { + /* + * No handler required for the ones below, we just need to + * convert arg to a 64 bit pointer. + */ + case BLKSECTSET: + /* + * 0x03 -- HD/IDE ioctl's used by hdparm and friends. + * Some need translations, these do not. + */ + case HDIO_GET_IDENTITY: + case HDIO_DRIVE_TASK: + case HDIO_DRIVE_CMD: + case HDIO_SCAN_HWIF: + /* 0x330 is reserved -- it used to be HDIO_GETGEO_BIG */ + case 0x330: + /* 0x02 -- Floppy ioctls */ + case FDMSGON: + case FDMSGOFF: + case FDSETEMSGTRESH: + case FDFLUSH: + case FDWERRORCLR: + case FDSETMAXERRS: + case FDGETMAXERRS: + case FDGETDRVTYP: + case FDEJECT: + case FDCLRPRM: + case FDFMTBEG: + case FDFMTEND: + case FDRESET: + case FDTWADDLE: + case FDFMTTRK: + case FDRAWCMD: + /* CDROM stuff */ + case CDROMPAUSE: + case CDROMRESUME: + case CDROMPLAYMSF: + case CDROMPLAYTRKIND: + case CDROMREADTOCHDR: + case CDROMREADTOCENTRY: + case CDROMSTOP: + case CDROMSTART: + case CDROMEJECT: + case CDROMVOLCTRL: + case CDROMSUBCHNL: + case CDROMMULTISESSION: + case CDROM_GET_MCN: + case CDROMRESET: + case CDROMVOLREAD: + case CDROMSEEK: + case CDROMPLAYBLK: + case CDROMCLOSETRAY: + case CDROM_DISC_STATUS: + case CDROM_CHANGER_NSLOTS: + case CDROM_GET_CAPABILITY: + /* Ignore cdrom.h about these next 5 ioctls, they absolutely do + * not take a struct cdrom_read, instead they take a struct cdrom_msf + * which is compatible. + */ + case CDROMREADMODE2: + case CDROMREADMODE1: + case CDROMREADRAW: + case CDROMREADCOOKED: + case CDROMREADALL: + /* DVD ioctls */ + case DVD_READ_STRUCT: + case DVD_WRITE_STRUCT: + case DVD_AUTH: + arg = (unsigned long)compat_ptr(arg); + /* These intepret arg as an unsigned long, not as a pointer, + * so we must not do compat_ptr() conversion. */ + case HDIO_SET_MULTCOUNT: + case HDIO_SET_UNMASKINTR: + case HDIO_SET_KEEPSETTINGS: + case HDIO_SET_32BIT: + case HDIO_SET_NOWERR: + case HDIO_SET_DMA: + case HDIO_SET_PIO_MODE: + case HDIO_SET_NICE: + case HDIO_SET_WCACHE: + case HDIO_SET_ACOUSTIC: + case HDIO_SET_BUSSTATE: + case HDIO_SET_ADDRESS: + case CDROMEJECT_SW: + case CDROM_SET_OPTIONS: + case CDROM_CLEAR_OPTIONS: + case CDROM_SELECT_SPEED: + case CDROM_SELECT_DISC: + case CDROM_MEDIA_CHANGED: + case CDROM_DRIVE_STATUS: + case CDROM_LOCKDOOR: + case CDROM_DEBUG: + break; + default: + /* unknown ioctl number */ + return -ENOIOCTLCMD; + } + + if (disk->fops->unlocked_ioctl) + return disk->fops->unlocked_ioctl(file, cmd, arg); + + if (disk->fops->ioctl) { + lock_kernel(); + ret = disk->fops->ioctl(inode, file, cmd, arg); + unlock_kernel(); + return ret; + } + + return -ENOTTY; +} + static int compat_blkdev_locked_ioctl(struct inode *inode, struct file *file, struct block_device *bdev, unsigned cmd, unsigned long arg) @@ -117,5 +233,8 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) ret = disk->fops->compat_ioctl(file, cmd, arg); unlock_kernel(); - return ret; + if (ret != -ENOIOCTLCMD) + return ret; + + return compat_blkdev_driver_ioctl(inode, file, disk, cmd, arg); } |