compat_ioctl: add compat_blkdev_driver_ioctl()

Handle those blockdev ioctl calls that are compatible
directly from the compat_blkdev_ioctl() function, instead
of having to go through the compat_ioctl hash lookup.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c
index d20fdb4..500cc9e 100644 (file)
--- 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);
 }

diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 6be1218..16d681c 100644 (file)
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -2477,47 +2477,8 @@ COMPATIBLE_IOCTL(FIONREAD)  /* This is also TIOCINQ */
 /* 0x00 */
 COMPATIBLE_IOCTL(FIBMAP)
 COMPATIBLE_IOCTL(FIGETBSZ)
-/* 0x03 -- HD/IDE ioctl's used by hdparm and friends.
- *         Some need translations, these do not.
- */
-COMPATIBLE_IOCTL(HDIO_GET_IDENTITY)
-COMPATIBLE_IOCTL(HDIO_DRIVE_TASK)
-COMPATIBLE_IOCTL(HDIO_DRIVE_CMD)
-ULONG_IOCTL(HDIO_SET_MULTCOUNT)
-ULONG_IOCTL(HDIO_SET_UNMASKINTR)
-ULONG_IOCTL(HDIO_SET_KEEPSETTINGS)
-ULONG_IOCTL(HDIO_SET_32BIT)
-ULONG_IOCTL(HDIO_SET_NOWERR)
-ULONG_IOCTL(HDIO_SET_DMA)
-ULONG_IOCTL(HDIO_SET_PIO_MODE)
-ULONG_IOCTL(HDIO_SET_NICE)
-ULONG_IOCTL(HDIO_SET_WCACHE)
-ULONG_IOCTL(HDIO_SET_ACOUSTIC)
-ULONG_IOCTL(HDIO_SET_BUSSTATE)
-ULONG_IOCTL(HDIO_SET_ADDRESS)
-COMPATIBLE_IOCTL(HDIO_SCAN_HWIF)
-/* 0x330 is reserved -- it used to be HDIO_GETGEO_BIG */
-COMPATIBLE_IOCTL(0x330)
-/* 0x02 -- Floppy ioctls */
-COMPATIBLE_IOCTL(FDMSGON)
-COMPATIBLE_IOCTL(FDMSGOFF)
-COMPATIBLE_IOCTL(FDSETEMSGTRESH)
-COMPATIBLE_IOCTL(FDFLUSH)
-COMPATIBLE_IOCTL(FDWERRORCLR)
-COMPATIBLE_IOCTL(FDSETMAXERRS)
-COMPATIBLE_IOCTL(FDGETMAXERRS)
-COMPATIBLE_IOCTL(FDGETDRVTYP)
-COMPATIBLE_IOCTL(FDEJECT)
-COMPATIBLE_IOCTL(FDCLRPRM)
-COMPATIBLE_IOCTL(FDFMTBEG)
-COMPATIBLE_IOCTL(FDFMTEND)
-COMPATIBLE_IOCTL(FDRESET)
-COMPATIBLE_IOCTL(FDTWADDLE)
-COMPATIBLE_IOCTL(FDFMTTRK)
-COMPATIBLE_IOCTL(FDRAWCMD)
 /* 0x12 */
 #ifdef CONFIG_BLOCK
-COMPATIBLE_IOCTL(BLKSECTSET)
 COMPATIBLE_IOCTL(BLKTRACESTART)
 COMPATIBLE_IOCTL(BLKTRACESTOP)
 COMPATIBLE_IOCTL(BLKTRACESETUP)
@@ -2770,50 +2731,6 @@ COMPATIBLE_IOCTL(PPGETMODE)
 COMPATIBLE_IOCTL(PPGETPHASE)
 COMPATIBLE_IOCTL(PPGETFLAGS)
 COMPATIBLE_IOCTL(PPSETFLAGS)
-/* CDROM stuff */
-COMPATIBLE_IOCTL(CDROMPAUSE)
-COMPATIBLE_IOCTL(CDROMRESUME)
-COMPATIBLE_IOCTL(CDROMPLAYMSF)
-COMPATIBLE_IOCTL(CDROMPLAYTRKIND)
-COMPATIBLE_IOCTL(CDROMREADTOCHDR)
-COMPATIBLE_IOCTL(CDROMREADTOCENTRY)
-COMPATIBLE_IOCTL(CDROMSTOP)
-COMPATIBLE_IOCTL(CDROMSTART)
-COMPATIBLE_IOCTL(CDROMEJECT)
-COMPATIBLE_IOCTL(CDROMVOLCTRL)
-COMPATIBLE_IOCTL(CDROMSUBCHNL)
-ULONG_IOCTL(CDROMEJECT_SW)
-COMPATIBLE_IOCTL(CDROMMULTISESSION)
-COMPATIBLE_IOCTL(CDROM_GET_MCN)
-COMPATIBLE_IOCTL(CDROMRESET)
-COMPATIBLE_IOCTL(CDROMVOLREAD)
-COMPATIBLE_IOCTL(CDROMSEEK)
-COMPATIBLE_IOCTL(CDROMPLAYBLK)
-COMPATIBLE_IOCTL(CDROMCLOSETRAY)
-ULONG_IOCTL(CDROM_SET_OPTIONS)
-ULONG_IOCTL(CDROM_CLEAR_OPTIONS)
-ULONG_IOCTL(CDROM_SELECT_SPEED)
-ULONG_IOCTL(CDROM_SELECT_DISC)
-ULONG_IOCTL(CDROM_MEDIA_CHANGED)
-ULONG_IOCTL(CDROM_DRIVE_STATUS)
-COMPATIBLE_IOCTL(CDROM_DISC_STATUS)
-COMPATIBLE_IOCTL(CDROM_CHANGER_NSLOTS)
-ULONG_IOCTL(CDROM_LOCKDOOR)
-ULONG_IOCTL(CDROM_DEBUG)
-COMPATIBLE_IOCTL(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.
- */
-COMPATIBLE_IOCTL(CDROMREADMODE2)
-COMPATIBLE_IOCTL(CDROMREADMODE1)
-COMPATIBLE_IOCTL(CDROMREADRAW)
-COMPATIBLE_IOCTL(CDROMREADCOOKED)
-COMPATIBLE_IOCTL(CDROMREADALL)
-/* DVD ioctls */
-COMPATIBLE_IOCTL(DVD_READ_STRUCT)
-COMPATIBLE_IOCTL(DVD_WRITE_STRUCT)
-COMPATIBLE_IOCTL(DVD_AUTH)
 /* pktcdvd */
 COMPATIBLE_IOCTL(PACKET_CTRL_CMD)
 /* Big A */