diff options
Diffstat (limited to 'block/compat_ioctl.c')
| -rw-r--r-- | block/compat_ioctl.c | 427 |
1 files changed, 0 insertions, 427 deletions
diff --git a/block/compat_ioctl.c b/block/compat_ioctl.c deleted file mode 100644 index 3ed7a0f144a9..000000000000 --- a/block/compat_ioctl.c +++ /dev/null @@ -1,427 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#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/hdreg.h> -#include <linux/pr.h> -#include <linux/slab.h> -#include <linux/syscalls.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_uint(unsigned long arg, unsigned int val) -{ - return put_user(val, (compat_uint_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)); -} - -struct compat_hd_geometry { - unsigned char heads; - unsigned char sectors; - unsigned short cylinders; - u32 start; -}; - -static int compat_hdio_getgeo(struct gendisk *disk, struct block_device *bdev, - struct compat_hd_geometry __user *ugeo) -{ - struct hd_geometry geo; - int ret; - - if (!ugeo) - return -EINVAL; - if (!disk->fops->getgeo) - return -ENOTTY; - - memset(&geo, 0, sizeof(geo)); - /* - * We need to set the startsect first, the driver may - * want to override it. - */ - geo.start = get_start_sect(bdev); - ret = disk->fops->getgeo(bdev, &geo); - if (ret) - return ret; - - ret = copy_to_user(ugeo, &geo, 4); - ret |= put_user(geo.start, &ugeo->start); - if (ret) - ret = -EFAULT; - - return ret; -} - -static int compat_hdio_ioctl(struct block_device *bdev, fmode_t mode, - unsigned int cmd, unsigned long arg) -{ - unsigned long __user *p; - int error; - - p = compat_alloc_user_space(sizeof(unsigned long)); - error = __blkdev_driver_ioctl(bdev, mode, - cmd, (unsigned long)p); - if (error == 0) { - unsigned int __user *uvp = compat_ptr(arg); - unsigned long v; - if (get_user(v, p) || put_user(v, uvp)) - error = -EFAULT; - } - return error; -} - -struct compat_cdrom_read_audio { - union cdrom_addr addr; - u8 addr_format; - compat_int_t nframes; - compat_caddr_t buf; -}; - -struct compat_cdrom_generic_command { - unsigned char cmd[CDROM_PACKET_SIZE]; - compat_caddr_t buffer; - compat_uint_t buflen; - compat_int_t stat; - compat_caddr_t sense; - unsigned char data_direction; - compat_int_t quiet; - compat_int_t timeout; - compat_caddr_t reserved[1]; -}; - -static int compat_cdrom_read_audio(struct block_device *bdev, fmode_t mode, - unsigned int cmd, unsigned long arg) -{ - struct cdrom_read_audio __user *cdread_audio; - struct compat_cdrom_read_audio __user *cdread_audio32; - __u32 data; - void __user *datap; - - cdread_audio = compat_alloc_user_space(sizeof(*cdread_audio)); - cdread_audio32 = compat_ptr(arg); - - if (copy_in_user(&cdread_audio->addr, - &cdread_audio32->addr, - (sizeof(*cdread_audio32) - - sizeof(compat_caddr_t)))) - return -EFAULT; - - if (get_user(data, &cdread_audio32->buf)) - return -EFAULT; - datap = compat_ptr(data); - if (put_user(datap, &cdread_audio->buf)) - return -EFAULT; - - return __blkdev_driver_ioctl(bdev, mode, cmd, - (unsigned long)cdread_audio); -} - -static int compat_cdrom_generic_command(struct block_device *bdev, fmode_t mode, - unsigned int cmd, unsigned long arg) -{ - struct cdrom_generic_command __user *cgc; - struct compat_cdrom_generic_command __user *cgc32; - u32 data; - unsigned char dir; - int itmp; - - cgc = compat_alloc_user_space(sizeof(*cgc)); - cgc32 = compat_ptr(arg); - - if (copy_in_user(&cgc->cmd, &cgc32->cmd, sizeof(cgc->cmd)) || - get_user(data, &cgc32->buffer) || - put_user(compat_ptr(data), &cgc->buffer) || - copy_in_user(&cgc->buflen, &cgc32->buflen, - (sizeof(unsigned int) + sizeof(int))) || - get_user(data, &cgc32->sense) || - put_user(compat_ptr(data), &cgc->sense) || - get_user(dir, &cgc32->data_direction) || - put_user(dir, &cgc->data_direction) || - get_user(itmp, &cgc32->quiet) || - put_user(itmp, &cgc->quiet) || - get_user(itmp, &cgc32->timeout) || - put_user(itmp, &cgc->timeout) || - get_user(data, &cgc32->reserved[0]) || - put_user(compat_ptr(data), &cgc->reserved[0])) - return -EFAULT; - - return __blkdev_driver_ioctl(bdev, mode, cmd, (unsigned long)cgc); -} - -struct compat_blkpg_ioctl_arg { - compat_int_t op; - compat_int_t flags; - compat_int_t datalen; - compat_caddr_t data; -}; - -static int compat_blkpg_ioctl(struct block_device *bdev, fmode_t mode, - unsigned int cmd, struct compat_blkpg_ioctl_arg __user *ua32) -{ - struct blkpg_ioctl_arg __user *a = compat_alloc_user_space(sizeof(*a)); - compat_caddr_t udata; - compat_int_t n; - int err; - - err = get_user(n, &ua32->op); - err |= put_user(n, &a->op); - err |= get_user(n, &ua32->flags); - err |= put_user(n, &a->flags); - err |= get_user(n, &ua32->datalen); - err |= put_user(n, &a->datalen); - err |= get_user(udata, &ua32->data); - err |= put_user(compat_ptr(udata), &a->data); - if (err) - return err; - - return blkdev_ioctl(bdev, mode, cmd, (unsigned long)a); -} - -#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_driver_ioctl(struct block_device *bdev, fmode_t mode, - unsigned cmd, unsigned long arg) -{ - switch (cmd) { - case HDIO_GET_UNMASKINTR: - case HDIO_GET_MULTCOUNT: - case HDIO_GET_KEEPSETTINGS: - case HDIO_GET_32BIT: - case HDIO_GET_NOWERR: - case HDIO_GET_DMA: - case HDIO_GET_NICE: - case HDIO_GET_WCACHE: - case HDIO_GET_ACOUSTIC: - case HDIO_GET_ADDRESS: - case HDIO_GET_BUSSTATE: - return compat_hdio_ioctl(bdev, mode, cmd, arg); - case CDROMREADAUDIO: - return compat_cdrom_read_audio(bdev, mode, cmd, arg); - case CDROM_SEND_PACKET: - return compat_cdrom_generic_command(bdev, mode, cmd, 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: - /* 0x330 is reserved -- it used to be HDIO_GETGEO_BIG */ - case 0x330: - /* 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; - } - - return __blkdev_driver_ioctl(bdev, mode, 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) -{ - int ret = -ENOIOCTLCMD; - struct inode *inode = file->f_mapping->host; - struct block_device *bdev = inode->i_bdev; - struct gendisk *disk = bdev->bd_disk; - fmode_t mode = file->f_mode; - loff_t size; - unsigned int max_sectors; - - /* - * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have - * to updated it before every ioctl. - */ - if (file->f_flags & O_NDELAY) - mode |= FMODE_NDELAY; - else - mode &= ~FMODE_NDELAY; - - switch (cmd) { - case HDIO_GETGEO: - return compat_hdio_getgeo(disk, bdev, compat_ptr(arg)); - case BLKPBSZGET: - return compat_put_uint(arg, bdev_physical_block_size(bdev)); - case BLKIOMIN: - return compat_put_uint(arg, bdev_io_min(bdev)); - case BLKIOOPT: - return compat_put_uint(arg, bdev_io_opt(bdev)); - case BLKALIGNOFF: - return compat_put_int(arg, bdev_alignment_offset(bdev)); - case BLKDISCARDZEROES: - return compat_put_uint(arg, 0); - case BLKFLSBUF: - case BLKROSET: - case BLKDISCARD: - case BLKSECDISCARD: - case BLKZEROOUT: - /* - * the ones below are implemented in blkdev_locked_ioctl, - * but we call blkdev_ioctl, which gets the lock for us - */ - case BLKRRPART: - case BLKREPORTZONE: - case BLKRESETZONE: - case BLKOPENZONE: - case BLKCLOSEZONE: - case BLKFINISHZONE: - case BLKGETZONESZ: - case BLKGETNRZONES: - return blkdev_ioctl(bdev, mode, cmd, - (unsigned long)compat_ptr(arg)); - case BLKBSZSET_32: - return blkdev_ioctl(bdev, mode, BLKBSZSET, - (unsigned long)compat_ptr(arg)); - case BLKPG: - return compat_blkpg_ioctl(bdev, mode, cmd, compat_ptr(arg)); - case BLKRAGET: - case BLKFRAGET: - if (!arg) - return -EINVAL; - return compat_put_long(arg, - (bdev->bd_bdi->ra_pages * PAGE_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_logical_block_size(bdev)); - case BLKSECTGET: - max_sectors = min_t(unsigned int, USHRT_MAX, - queue_max_sectors(bdev_get_queue(bdev))); - return compat_put_ushort(arg, max_sectors); - case BLKROTATIONAL: - return compat_put_ushort(arg, - !blk_queue_nonrot(bdev_get_queue(bdev))); - case BLKRASET: /* compatible, but no compat_ptr (!) */ - case BLKFRASET: - if (!capable(CAP_SYS_ADMIN)) - return -EACCES; - bdev->bd_bdi->ra_pages = (arg * 512) / PAGE_SIZE; - return 0; - case BLKGETSIZE: - size = i_size_read(bdev->bd_inode); - if ((size >> 9) > ~0UL) - return -EFBIG; - return compat_put_ulong(arg, size >> 9); - - case BLKGETSIZE64_32: - return compat_put_u64(arg, i_size_read(bdev->bd_inode)); - - case BLKTRACESETUP32: - case BLKTRACESTART: /* compatible */ - case BLKTRACESTOP: /* compatible */ - case BLKTRACETEARDOWN: /* compatible */ - ret = blk_trace_ioctl(bdev, cmd, compat_ptr(arg)); - return ret; - case IOC_PR_REGISTER: - case IOC_PR_RESERVE: - case IOC_PR_RELEASE: - case IOC_PR_PREEMPT: - case IOC_PR_PREEMPT_ABORT: - case IOC_PR_CLEAR: - return blkdev_ioctl(bdev, mode, cmd, - (unsigned long)compat_ptr(arg)); - default: - if (disk->fops->compat_ioctl) - ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg); - if (ret == -ENOIOCTLCMD) - ret = compat_blkdev_driver_ioctl(bdev, mode, cmd, arg); - return ret; - } -} |