diff options
| -rw-r--r-- | block/Makefile | 1 | ||||
| -rw-r--r-- | block/compat_ioctl.c | 121 | ||||
| -rw-r--r-- | block/ioctl.c | 21 | ||||
| -rw-r--r-- | fs/compat_ioctl.c | 45 |
4 files changed, 126 insertions, 62 deletions
diff --git a/block/Makefile b/block/Makefile index 959feeb..3cfe7ce 100644 --- a/block/Makefile +++ b/block/Makefile @@ -11,3 +11,4 @@ obj-$(CONFIG_IOSCHED_DEADLINE) += deadline-iosched.o obj-$(CONFIG_IOSCHED_CFQ) += cfq-iosched.o obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o +obj-$(CONFIG_COMPAT) += compat_ioctl.o diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c new file mode 100644 index 0000000..d20fdb4 --- /dev/null +++ b/block/compat_ioctl.c @@ -0,0 +1,121 @@ +#include <linux/blkdev.h> +#include <linux/blkpg.h> +#include <linux/blktrace_api.h> +#include <linux/cdrom.h> +#include <linux/compat.h> +#include <linux/elevator.h> +#include <linux/fd.h> +#include <linux/hdreg.h> +#include <linux/syscalls.h> +#include <linux/smp_lock.h> +#include <linux/types.h> +#include <linux/uaccess.h> + +static int compat_put_ushort(unsigned long arg, unsigned short val) +{ + return put_user(val, (unsigned short __user *)compat_ptr(arg)); +} + +static int compat_put_int(unsigned long arg, int val) +{ + return put_user(val, (compat_int_t __user *)compat_ptr(arg)); +} + +static int compat_put_long(unsigned long arg, long val) +{ + return put_user(val, (compat_long_t __user *)compat_ptr(arg)); +} + +static int compat_put_ulong(unsigned long arg, compat_ulong_t val) +{ + return put_user(val, (compat_ulong_t __user *)compat_ptr(arg)); +} + +static int compat_put_u64(unsigned long arg, u64 val) +{ + return put_user(val, (compat_u64 __user *)compat_ptr(arg)); +} + +#define BLKBSZGET_32 _IOR(0x12, 112, int) +#define BLKBSZSET_32 _IOW(0x12, 113, int) +#define BLKGETSIZE64_32 _IOR(0x12, 114, int) + +static int compat_blkdev_locked_ioctl(struct inode *inode, struct file *file, + struct block_device *bdev, + unsigned cmd, unsigned long arg) +{ + struct backing_dev_info *bdi; + + switch (cmd) { + case BLKRAGET: + case BLKFRAGET: + if (!arg) + return -EINVAL; + bdi = blk_get_backing_dev_info(bdev); + if (bdi == NULL) + return -ENOTTY; + return compat_put_long(arg, + (bdi->ra_pages * PAGE_CACHE_SIZE) / 512); + case BLKROGET: /* compatible */ + return compat_put_int(arg, bdev_read_only(bdev) != 0); + case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */ + return compat_put_int(arg, block_size(bdev)); + case BLKSSZGET: /* get block device hardware sector size */ + return compat_put_int(arg, bdev_hardsect_size(bdev)); + case BLKSECTGET: + return compat_put_ushort(arg, + bdev_get_queue(bdev)->max_sectors); + case BLKRASET: /* compatible, but no compat_ptr (!) */ + case BLKFRASET: + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + bdi = blk_get_backing_dev_info(bdev); + if (bdi == NULL) + return -ENOTTY; + bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE; + return 0; + case BLKGETSIZE: + if ((bdev->bd_inode->i_size >> 9) > ~0UL) + return -EFBIG; + return compat_put_ulong(arg, bdev->bd_inode->i_size >> 9); + + case BLKGETSIZE64_32: + return compat_put_u64(arg, bdev->bd_inode->i_size); + } + return -ENOIOCTLCMD; +} + +/* Most of the generic ioctls are handled in the normal fallback path. + This assumes the blkdev's low level compat_ioctl always returns + ENOIOCTLCMD for unknown ioctls. */ +long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) +{ + int ret = -ENOIOCTLCMD; + struct inode *inode = file->f_mapping->host; + struct block_device *bdev = inode->i_bdev; + struct gendisk *disk = bdev->bd_disk; + + switch (cmd) { + case BLKFLSBUF: + case BLKROSET: + /* + * the ones below are implemented in blkdev_locked_ioctl, + * but we call blkdev_ioctl, which gets the lock for us + */ + case BLKRRPART: + return blkdev_ioctl(inode, file, cmd, + (unsigned long)compat_ptr(arg)); + case BLKBSZSET_32: + return blkdev_ioctl(inode, file, BLKBSZSET, + (unsigned long)compat_ptr(arg)); + } + + lock_kernel(); + ret = compat_blkdev_locked_ioctl(inode, file, bdev, cmd, arg); + /* FIXME: why do we assume -> compat_ioctl needs the BKL? */ + if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl) + ret = disk->fops->compat_ioctl(file, cmd, arg); + unlock_kernel(); + + return ret; +} diff --git a/block/ioctl.c b/block/ioctl.c index f7e3e8a..52d6385 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -217,6 +217,10 @@ int blkdev_driver_ioctl(struct inode *inode, struct file *file, } EXPORT_SYMBOL_GPL(blkdev_driver_ioctl); +/* + * always keep this in sync with compat_blkdev_ioctl() and + * compat_blkdev_locked_ioctl() + */ int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd, unsigned long arg) { @@ -284,21 +288,4 @@ int blkdev_ioctl(struct inode *inode, struct file *file, unsigned cmd, return blkdev_driver_ioctl(inode, file, disk, cmd, arg); } - -/* Most of the generic ioctls are handled in the normal fallback path. - This assumes the blkdev's low level compat_ioctl always returns - ENOIOCTLCMD for unknown ioctls. */ -long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) -{ - struct block_device *bdev = file->f_path.dentry->d_inode->i_bdev; - struct gendisk *disk = bdev->bd_disk; - int ret = -ENOIOCTLCMD; - if (disk->fops->compat_ioctl) { - lock_kernel(); - ret = disk->fops->compat_ioctl(file, cmd, arg); - unlock_kernel(); - } - return ret; -} - EXPORT_SYMBOL_GPL(blkdev_ioctl); diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index 37310b0..6be1218 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -1537,12 +1537,6 @@ ret_einval(unsigned int fd, unsigned int cmd, unsigned long arg) } #ifdef CONFIG_BLOCK -static int broken_blkgetsize(unsigned int fd, unsigned int cmd, unsigned long arg) -{ - /* The mkswap binary hard codes it to Intel value :-((( */ - return w_long(fd, BLKGETSIZE, arg); -} - struct blkpg_ioctl_arg32 { compat_int_t op; compat_int_t flags; @@ -1578,29 +1572,6 @@ static int ioc_settimeout(unsigned int fd, unsigned int cmd, unsigned long arg) return rw_long(fd, AUTOFS_IOC_SETTIMEOUT, arg); } -#ifdef CONFIG_BLOCK -/* Fix sizeof(sizeof()) breakage */ -#define BLKBSZGET_32 _IOR(0x12,112,int) -#define BLKBSZSET_32 _IOW(0x12,113,int) -#define BLKGETSIZE64_32 _IOR(0x12,114,int) - -static int do_blkbszget(unsigned int fd, unsigned int cmd, unsigned long arg) -{ - return sys_ioctl(fd, BLKBSZGET, (unsigned long)compat_ptr(arg)); -} - -static int do_blkbszset(unsigned int fd, unsigned int cmd, unsigned long arg) -{ - return sys_ioctl(fd, BLKBSZSET, (unsigned long)compat_ptr(arg)); -} - -static int do_blkgetsize64(unsigned int fd, unsigned int cmd, - unsigned long arg) -{ - return sys_ioctl(fd, BLKGETSIZE64, (unsigned long)compat_ptr(arg)); -} -#endif - /* Bluetooth ioctls */ #define HCIUARTSETPROTO _IOW('U', 200, int) #define HCIUARTGETPROTO _IOR('U', 201, int) @@ -2546,19 +2517,11 @@ COMPATIBLE_IOCTL(FDFMTTRK) COMPATIBLE_IOCTL(FDRAWCMD) /* 0x12 */ #ifdef CONFIG_BLOCK -COMPATIBLE_IOCTL(BLKRASET) -COMPATIBLE_IOCTL(BLKROSET) -COMPATIBLE_IOCTL(BLKROGET) -COMPATIBLE_IOCTL(BLKRRPART) -COMPATIBLE_IOCTL(BLKFLSBUF) COMPATIBLE_IOCTL(BLKSECTSET) -COMPATIBLE_IOCTL(BLKSSZGET) COMPATIBLE_IOCTL(BLKTRACESTART) COMPATIBLE_IOCTL(BLKTRACESTOP) COMPATIBLE_IOCTL(BLKTRACESETUP) COMPATIBLE_IOCTL(BLKTRACETEARDOWN) -ULONG_IOCTL(BLKRASET) -ULONG_IOCTL(BLKFRASET) #endif /* RAID */ COMPATIBLE_IOCTL(RAID_VERSION) @@ -3337,11 +3300,6 @@ HANDLE_IOCTL(SIOCGSTAMPNS, do_siocgstampns) #endif #ifdef CONFIG_BLOCK HANDLE_IOCTL(HDIO_GETGEO, hdio_getgeo) -HANDLE_IOCTL(BLKRAGET, w_long) -HANDLE_IOCTL(BLKGETSIZE, w_long) -HANDLE_IOCTL(0x1260, broken_blkgetsize) -HANDLE_IOCTL(BLKFRAGET, w_long) -HANDLE_IOCTL(BLKSECTGET, w_long) HANDLE_IOCTL(BLKPG, blkpg_ioctl_trans) HANDLE_IOCTL(HDIO_GET_UNMASKINTR, hdio_ioctl_trans) HANDLE_IOCTL(HDIO_GET_MULTCOUNT, hdio_ioctl_trans) @@ -3415,9 +3373,6 @@ HANDLE_IOCTL(SONET_GETFRAMING, do_atm_ioctl) HANDLE_IOCTL(SONET_GETFRSENSE, do_atm_ioctl) /* block stuff */ #ifdef CONFIG_BLOCK -HANDLE_IOCTL(BLKBSZGET_32, do_blkbszget) -HANDLE_IOCTL(BLKBSZSET_32, do_blkbszset) -HANDLE_IOCTL(BLKGETSIZE64_32, do_blkgetsize64) /* Raw devices */ HANDLE_IOCTL(RAW_SETBIND, raw_ioctl) HANDLE_IOCTL(RAW_GETBIND, raw_ioctl) |
