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We can easily have up to 24 flags with sane atomicity, _without_ pushing anything out of the first cacheline of struct block_device. -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQQqUNBr3gm4hGXdBJlZ7Krx/gZQ6wUCZkznRwAKCRBZ7Krx/gZQ 69XpAQDOZCyvYOZ/dlMOKKLf2vAojC/h++E/NjvGt3erbvVN2wEArXMi13ECsoCw JYJA3MsmvjuY6VNcm24icf2/p4TMIgo= =JyYi -----END PGP SIGNATURE----- Merge tag 'pull-bd_flags-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull bdev flags update from Al Viro: "Compactifying bdev flags. We can easily have up to 24 flags with sane atomicity, _without_ pushing anything out of the first cacheline of struct block_device" * tag 'pull-bd_flags-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: bdev: move ->bd_make_it_fail to ->__bd_flags bdev: move ->bd_ro_warned to ->__bd_flags bdev: move ->bd_has_subit_bio to ->__bd_flags bdev: move ->bd_write_holder into ->__bd_flags bdev: move ->bd_read_only to ->__bd_flags bdev: infrastructure for flags wrapper for access to ->bd_partno Use bdev_is_paritition() instead of open-coding it
737 lines
18 KiB
C
737 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/capability.h>
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#include <linux/compat.h>
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#include <linux/blkdev.h>
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#include <linux/export.h>
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#include <linux/gfp.h>
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#include <linux/blkpg.h>
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#include <linux/hdreg.h>
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#include <linux/backing-dev.h>
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#include <linux/fs.h>
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#include <linux/blktrace_api.h>
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#include <linux/pr.h>
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#include <linux/uaccess.h>
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#include "blk.h"
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static int blkpg_do_ioctl(struct block_device *bdev,
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struct blkpg_partition __user *upart, int op)
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{
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struct gendisk *disk = bdev->bd_disk;
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struct blkpg_partition p;
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sector_t start, length, capacity, end;
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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if (copy_from_user(&p, upart, sizeof(struct blkpg_partition)))
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return -EFAULT;
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if (bdev_is_partition(bdev))
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return -EINVAL;
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if (p.pno <= 0)
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return -EINVAL;
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if (op == BLKPG_DEL_PARTITION)
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return bdev_del_partition(disk, p.pno);
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if (p.start < 0 || p.length <= 0 || LLONG_MAX - p.length < p.start)
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return -EINVAL;
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/* Check that the partition is aligned to the block size */
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if (!IS_ALIGNED(p.start | p.length, bdev_logical_block_size(bdev)))
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return -EINVAL;
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start = p.start >> SECTOR_SHIFT;
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length = p.length >> SECTOR_SHIFT;
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capacity = get_capacity(disk);
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if (check_add_overflow(start, length, &end))
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return -EINVAL;
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if (start >= capacity || end > capacity)
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return -EINVAL;
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switch (op) {
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case BLKPG_ADD_PARTITION:
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return bdev_add_partition(disk, p.pno, start, length);
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case BLKPG_RESIZE_PARTITION:
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return bdev_resize_partition(disk, p.pno, start, length);
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default:
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return -EINVAL;
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}
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}
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static int blkpg_ioctl(struct block_device *bdev,
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struct blkpg_ioctl_arg __user *arg)
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{
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struct blkpg_partition __user *udata;
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int op;
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if (get_user(op, &arg->op) || get_user(udata, &arg->data))
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return -EFAULT;
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return blkpg_do_ioctl(bdev, udata, op);
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}
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#ifdef CONFIG_COMPAT
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struct compat_blkpg_ioctl_arg {
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compat_int_t op;
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compat_int_t flags;
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compat_int_t datalen;
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compat_caddr_t data;
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};
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static int compat_blkpg_ioctl(struct block_device *bdev,
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struct compat_blkpg_ioctl_arg __user *arg)
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{
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compat_caddr_t udata;
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int op;
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if (get_user(op, &arg->op) || get_user(udata, &arg->data))
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return -EFAULT;
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return blkpg_do_ioctl(bdev, compat_ptr(udata), op);
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}
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#endif
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static int blk_ioctl_discard(struct block_device *bdev, blk_mode_t mode,
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unsigned long arg)
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{
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unsigned int bs_mask = bdev_logical_block_size(bdev) - 1;
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uint64_t range[2], start, len, end;
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struct bio *prev = NULL, *bio;
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sector_t sector, nr_sects;
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struct blk_plug plug;
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int err;
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if (!(mode & BLK_OPEN_WRITE))
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return -EBADF;
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if (!bdev_max_discard_sectors(bdev))
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return -EOPNOTSUPP;
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if (bdev_read_only(bdev))
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return -EPERM;
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if (copy_from_user(range, (void __user *)arg, sizeof(range)))
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return -EFAULT;
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start = range[0];
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len = range[1];
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if (!len)
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return -EINVAL;
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if ((start | len) & bs_mask)
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return -EINVAL;
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if (check_add_overflow(start, len, &end) ||
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end > bdev_nr_bytes(bdev))
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return -EINVAL;
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filemap_invalidate_lock(bdev->bd_mapping);
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err = truncate_bdev_range(bdev, mode, start, start + len - 1);
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if (err)
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goto fail;
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sector = start >> SECTOR_SHIFT;
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nr_sects = len >> SECTOR_SHIFT;
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blk_start_plug(&plug);
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while (1) {
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if (fatal_signal_pending(current)) {
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if (prev)
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bio_await_chain(prev);
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err = -EINTR;
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goto out_unplug;
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}
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bio = blk_alloc_discard_bio(bdev, §or, &nr_sects,
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GFP_KERNEL);
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if (!bio)
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break;
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prev = bio_chain_and_submit(prev, bio);
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}
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if (prev) {
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err = submit_bio_wait(prev);
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if (err == -EOPNOTSUPP)
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err = 0;
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bio_put(prev);
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}
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out_unplug:
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blk_finish_plug(&plug);
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fail:
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filemap_invalidate_unlock(bdev->bd_mapping);
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return err;
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}
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static int blk_ioctl_secure_erase(struct block_device *bdev, blk_mode_t mode,
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void __user *argp)
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{
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uint64_t start, len;
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uint64_t range[2];
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int err;
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if (!(mode & BLK_OPEN_WRITE))
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return -EBADF;
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if (!bdev_max_secure_erase_sectors(bdev))
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return -EOPNOTSUPP;
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if (copy_from_user(range, argp, sizeof(range)))
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return -EFAULT;
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start = range[0];
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len = range[1];
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if ((start & 511) || (len & 511))
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return -EINVAL;
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if (start + len > bdev_nr_bytes(bdev))
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return -EINVAL;
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filemap_invalidate_lock(bdev->bd_mapping);
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err = truncate_bdev_range(bdev, mode, start, start + len - 1);
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if (!err)
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err = blkdev_issue_secure_erase(bdev, start >> 9, len >> 9,
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GFP_KERNEL);
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filemap_invalidate_unlock(bdev->bd_mapping);
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return err;
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}
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static int blk_ioctl_zeroout(struct block_device *bdev, blk_mode_t mode,
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unsigned long arg)
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{
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uint64_t range[2];
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uint64_t start, end, len;
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int err;
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if (!(mode & BLK_OPEN_WRITE))
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return -EBADF;
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if (copy_from_user(range, (void __user *)arg, sizeof(range)))
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return -EFAULT;
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start = range[0];
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len = range[1];
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end = start + len - 1;
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if (start & 511)
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return -EINVAL;
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if (len & 511)
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return -EINVAL;
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if (end >= (uint64_t)bdev_nr_bytes(bdev))
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return -EINVAL;
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if (end < start)
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return -EINVAL;
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/* Invalidate the page cache, including dirty pages */
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filemap_invalidate_lock(bdev->bd_mapping);
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err = truncate_bdev_range(bdev, mode, start, end);
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if (err)
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goto fail;
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err = blkdev_issue_zeroout(bdev, start >> 9, len >> 9, GFP_KERNEL,
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BLKDEV_ZERO_NOUNMAP);
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fail:
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filemap_invalidate_unlock(bdev->bd_mapping);
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return err;
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}
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static int put_ushort(unsigned short __user *argp, unsigned short val)
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{
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return put_user(val, argp);
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}
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static int put_int(int __user *argp, int val)
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{
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return put_user(val, argp);
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}
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static int put_uint(unsigned int __user *argp, unsigned int val)
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{
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return put_user(val, argp);
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}
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static int put_long(long __user *argp, long val)
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{
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return put_user(val, argp);
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}
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static int put_ulong(unsigned long __user *argp, unsigned long val)
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{
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return put_user(val, argp);
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}
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static int put_u64(u64 __user *argp, u64 val)
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{
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return put_user(val, argp);
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}
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#ifdef CONFIG_COMPAT
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static int compat_put_long(compat_long_t __user *argp, long val)
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{
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return put_user(val, argp);
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}
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static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val)
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{
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return put_user(val, argp);
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}
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#endif
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#ifdef CONFIG_COMPAT
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/*
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* This is the equivalent of compat_ptr_ioctl(), to be used by block
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* drivers that implement only commands that are completely compatible
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* between 32-bit and 64-bit user space
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*/
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int blkdev_compat_ptr_ioctl(struct block_device *bdev, blk_mode_t mode,
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unsigned cmd, unsigned long arg)
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{
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struct gendisk *disk = bdev->bd_disk;
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if (disk->fops->ioctl)
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return disk->fops->ioctl(bdev, mode, cmd,
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(unsigned long)compat_ptr(arg));
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return -ENOIOCTLCMD;
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}
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EXPORT_SYMBOL(blkdev_compat_ptr_ioctl);
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#endif
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static bool blkdev_pr_allowed(struct block_device *bdev, blk_mode_t mode)
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{
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/* no sense to make reservations for partitions */
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if (bdev_is_partition(bdev))
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return false;
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if (capable(CAP_SYS_ADMIN))
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return true;
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/*
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* Only allow unprivileged reservations if the file descriptor is open
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* for writing.
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*/
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return mode & BLK_OPEN_WRITE;
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}
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static int blkdev_pr_register(struct block_device *bdev, blk_mode_t mode,
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struct pr_registration __user *arg)
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{
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const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
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struct pr_registration reg;
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if (!blkdev_pr_allowed(bdev, mode))
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return -EPERM;
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if (!ops || !ops->pr_register)
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return -EOPNOTSUPP;
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if (copy_from_user(®, arg, sizeof(reg)))
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return -EFAULT;
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if (reg.flags & ~PR_FL_IGNORE_KEY)
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return -EOPNOTSUPP;
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return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags);
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}
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static int blkdev_pr_reserve(struct block_device *bdev, blk_mode_t mode,
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struct pr_reservation __user *arg)
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{
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const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
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struct pr_reservation rsv;
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if (!blkdev_pr_allowed(bdev, mode))
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return -EPERM;
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if (!ops || !ops->pr_reserve)
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return -EOPNOTSUPP;
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if (copy_from_user(&rsv, arg, sizeof(rsv)))
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return -EFAULT;
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if (rsv.flags & ~PR_FL_IGNORE_KEY)
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return -EOPNOTSUPP;
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return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags);
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}
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static int blkdev_pr_release(struct block_device *bdev, blk_mode_t mode,
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struct pr_reservation __user *arg)
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{
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const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
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struct pr_reservation rsv;
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if (!blkdev_pr_allowed(bdev, mode))
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return -EPERM;
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if (!ops || !ops->pr_release)
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return -EOPNOTSUPP;
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if (copy_from_user(&rsv, arg, sizeof(rsv)))
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return -EFAULT;
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if (rsv.flags)
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return -EOPNOTSUPP;
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return ops->pr_release(bdev, rsv.key, rsv.type);
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}
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static int blkdev_pr_preempt(struct block_device *bdev, blk_mode_t mode,
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struct pr_preempt __user *arg, bool abort)
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{
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const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
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struct pr_preempt p;
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if (!blkdev_pr_allowed(bdev, mode))
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return -EPERM;
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if (!ops || !ops->pr_preempt)
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return -EOPNOTSUPP;
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if (copy_from_user(&p, arg, sizeof(p)))
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return -EFAULT;
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if (p.flags)
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return -EOPNOTSUPP;
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return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort);
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}
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static int blkdev_pr_clear(struct block_device *bdev, blk_mode_t mode,
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struct pr_clear __user *arg)
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{
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const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops;
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struct pr_clear c;
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if (!blkdev_pr_allowed(bdev, mode))
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return -EPERM;
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if (!ops || !ops->pr_clear)
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return -EOPNOTSUPP;
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if (copy_from_user(&c, arg, sizeof(c)))
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return -EFAULT;
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if (c.flags)
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return -EOPNOTSUPP;
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return ops->pr_clear(bdev, c.key);
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}
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static int blkdev_flushbuf(struct block_device *bdev, unsigned cmd,
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unsigned long arg)
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{
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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mutex_lock(&bdev->bd_holder_lock);
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if (bdev->bd_holder_ops && bdev->bd_holder_ops->sync)
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bdev->bd_holder_ops->sync(bdev);
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else {
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mutex_unlock(&bdev->bd_holder_lock);
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sync_blockdev(bdev);
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}
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invalidate_bdev(bdev);
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return 0;
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}
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static int blkdev_roset(struct block_device *bdev, unsigned cmd,
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unsigned long arg)
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{
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int ret, n;
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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if (get_user(n, (int __user *)arg))
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return -EFAULT;
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if (bdev->bd_disk->fops->set_read_only) {
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ret = bdev->bd_disk->fops->set_read_only(bdev, n);
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if (ret)
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return ret;
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}
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if (n)
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bdev_set_flag(bdev, BD_READ_ONLY);
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else
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bdev_clear_flag(bdev, BD_READ_ONLY);
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return 0;
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}
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static int blkdev_getgeo(struct block_device *bdev,
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struct hd_geometry __user *argp)
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{
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struct gendisk *disk = bdev->bd_disk;
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struct hd_geometry geo;
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int ret;
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if (!argp)
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return -EINVAL;
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if (!disk->fops->getgeo)
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return -ENOTTY;
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/*
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* We need to set the startsect first, the driver may
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* want to override it.
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*/
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memset(&geo, 0, sizeof(geo));
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geo.start = get_start_sect(bdev);
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ret = disk->fops->getgeo(bdev, &geo);
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if (ret)
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return ret;
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if (copy_to_user(argp, &geo, sizeof(geo)))
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return -EFAULT;
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return 0;
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}
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#ifdef CONFIG_COMPAT
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struct compat_hd_geometry {
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unsigned char heads;
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unsigned char sectors;
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unsigned short cylinders;
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u32 start;
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};
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static int compat_hdio_getgeo(struct block_device *bdev,
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struct compat_hd_geometry __user *ugeo)
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{
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struct gendisk *disk = bdev->bd_disk;
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struct hd_geometry geo;
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int ret;
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if (!ugeo)
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return -EINVAL;
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if (!disk->fops->getgeo)
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return -ENOTTY;
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memset(&geo, 0, sizeof(geo));
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/*
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* We need to set the startsect first, the driver may
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* want to override it.
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*/
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geo.start = get_start_sect(bdev);
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ret = disk->fops->getgeo(bdev, &geo);
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if (ret)
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return ret;
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ret = copy_to_user(ugeo, &geo, 4);
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ret |= put_user(geo.start, &ugeo->start);
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if (ret)
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ret = -EFAULT;
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return ret;
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}
|
|
#endif
|
|
|
|
/* set the logical block size */
|
|
static int blkdev_bszset(struct file *file, blk_mode_t mode,
|
|
int __user *argp)
|
|
{
|
|
// this one might be file_inode(file)->i_rdev - a rare valid
|
|
// use of file_inode() for those.
|
|
dev_t dev = I_BDEV(file->f_mapping->host)->bd_dev;
|
|
struct file *excl_file;
|
|
int ret, n;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
if (!argp)
|
|
return -EINVAL;
|
|
if (get_user(n, argp))
|
|
return -EFAULT;
|
|
|
|
if (mode & BLK_OPEN_EXCL)
|
|
return set_blocksize(file, n);
|
|
|
|
excl_file = bdev_file_open_by_dev(dev, mode, &dev, NULL);
|
|
if (IS_ERR(excl_file))
|
|
return -EBUSY;
|
|
ret = set_blocksize(excl_file, n);
|
|
fput(excl_file);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Common commands that are handled the same way on native and compat
|
|
* user space. Note the separate arg/argp parameters that are needed
|
|
* to deal with the compat_ptr() conversion.
|
|
*/
|
|
static int blkdev_common_ioctl(struct block_device *bdev, blk_mode_t mode,
|
|
unsigned int cmd, unsigned long arg,
|
|
void __user *argp)
|
|
{
|
|
unsigned int max_sectors;
|
|
|
|
switch (cmd) {
|
|
case BLKFLSBUF:
|
|
return blkdev_flushbuf(bdev, cmd, arg);
|
|
case BLKROSET:
|
|
return blkdev_roset(bdev, cmd, arg);
|
|
case BLKDISCARD:
|
|
return blk_ioctl_discard(bdev, mode, arg);
|
|
case BLKSECDISCARD:
|
|
return blk_ioctl_secure_erase(bdev, mode, argp);
|
|
case BLKZEROOUT:
|
|
return blk_ioctl_zeroout(bdev, mode, arg);
|
|
case BLKGETDISKSEQ:
|
|
return put_u64(argp, bdev->bd_disk->diskseq);
|
|
case BLKREPORTZONE:
|
|
return blkdev_report_zones_ioctl(bdev, cmd, arg);
|
|
case BLKRESETZONE:
|
|
case BLKOPENZONE:
|
|
case BLKCLOSEZONE:
|
|
case BLKFINISHZONE:
|
|
return blkdev_zone_mgmt_ioctl(bdev, mode, cmd, arg);
|
|
case BLKGETZONESZ:
|
|
return put_uint(argp, bdev_zone_sectors(bdev));
|
|
case BLKGETNRZONES:
|
|
return put_uint(argp, bdev_nr_zones(bdev));
|
|
case BLKROGET:
|
|
return put_int(argp, bdev_read_only(bdev) != 0);
|
|
case BLKSSZGET: /* get block device logical block size */
|
|
return put_int(argp, bdev_logical_block_size(bdev));
|
|
case BLKPBSZGET: /* get block device physical block size */
|
|
return put_uint(argp, bdev_physical_block_size(bdev));
|
|
case BLKIOMIN:
|
|
return put_uint(argp, bdev_io_min(bdev));
|
|
case BLKIOOPT:
|
|
return put_uint(argp, bdev_io_opt(bdev));
|
|
case BLKALIGNOFF:
|
|
return put_int(argp, bdev_alignment_offset(bdev));
|
|
case BLKDISCARDZEROES:
|
|
return put_uint(argp, 0);
|
|
case BLKSECTGET:
|
|
max_sectors = min_t(unsigned int, USHRT_MAX,
|
|
queue_max_sectors(bdev_get_queue(bdev)));
|
|
return put_ushort(argp, max_sectors);
|
|
case BLKROTATIONAL:
|
|
return put_ushort(argp, !bdev_nonrot(bdev));
|
|
case BLKRASET:
|
|
case BLKFRASET:
|
|
if(!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
bdev->bd_disk->bdi->ra_pages = (arg * 512) / PAGE_SIZE;
|
|
return 0;
|
|
case BLKRRPART:
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EACCES;
|
|
if (bdev_is_partition(bdev))
|
|
return -EINVAL;
|
|
return disk_scan_partitions(bdev->bd_disk,
|
|
mode | BLK_OPEN_STRICT_SCAN);
|
|
case BLKTRACESTART:
|
|
case BLKTRACESTOP:
|
|
case BLKTRACETEARDOWN:
|
|
return blk_trace_ioctl(bdev, cmd, argp);
|
|
case IOC_PR_REGISTER:
|
|
return blkdev_pr_register(bdev, mode, argp);
|
|
case IOC_PR_RESERVE:
|
|
return blkdev_pr_reserve(bdev, mode, argp);
|
|
case IOC_PR_RELEASE:
|
|
return blkdev_pr_release(bdev, mode, argp);
|
|
case IOC_PR_PREEMPT:
|
|
return blkdev_pr_preempt(bdev, mode, argp, false);
|
|
case IOC_PR_PREEMPT_ABORT:
|
|
return blkdev_pr_preempt(bdev, mode, argp, true);
|
|
case IOC_PR_CLEAR:
|
|
return blkdev_pr_clear(bdev, mode, argp);
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Always keep this in sync with compat_blkdev_ioctl()
|
|
* to handle all incompatible commands in both functions.
|
|
*
|
|
* New commands must be compatible and go into blkdev_common_ioctl
|
|
*/
|
|
long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
|
|
{
|
|
struct block_device *bdev = I_BDEV(file->f_mapping->host);
|
|
void __user *argp = (void __user *)arg;
|
|
blk_mode_t mode = file_to_blk_mode(file);
|
|
int ret;
|
|
|
|
switch (cmd) {
|
|
/* These need separate implementations for the data structure */
|
|
case HDIO_GETGEO:
|
|
return blkdev_getgeo(bdev, argp);
|
|
case BLKPG:
|
|
return blkpg_ioctl(bdev, argp);
|
|
|
|
/* Compat mode returns 32-bit data instead of 'long' */
|
|
case BLKRAGET:
|
|
case BLKFRAGET:
|
|
if (!argp)
|
|
return -EINVAL;
|
|
return put_long(argp,
|
|
(bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
|
|
case BLKGETSIZE:
|
|
if (bdev_nr_sectors(bdev) > ~0UL)
|
|
return -EFBIG;
|
|
return put_ulong(argp, bdev_nr_sectors(bdev));
|
|
|
|
/* The data is compatible, but the command number is different */
|
|
case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
|
|
return put_int(argp, block_size(bdev));
|
|
case BLKBSZSET:
|
|
return blkdev_bszset(file, mode, argp);
|
|
case BLKGETSIZE64:
|
|
return put_u64(argp, bdev_nr_bytes(bdev));
|
|
|
|
/* Incompatible alignment on i386 */
|
|
case BLKTRACESETUP:
|
|
return blk_trace_ioctl(bdev, cmd, argp);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
|
|
if (ret != -ENOIOCTLCMD)
|
|
return ret;
|
|
|
|
if (!bdev->bd_disk->fops->ioctl)
|
|
return -ENOTTY;
|
|
return bdev->bd_disk->fops->ioctl(bdev, mode, cmd, arg);
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
#define BLKBSZGET_32 _IOR(0x12, 112, int)
|
|
#define BLKBSZSET_32 _IOW(0x12, 113, int)
|
|
#define BLKGETSIZE64_32 _IOR(0x12, 114, int)
|
|
|
|
/* 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;
|
|
void __user *argp = compat_ptr(arg);
|
|
struct block_device *bdev = I_BDEV(file->f_mapping->host);
|
|
struct gendisk *disk = bdev->bd_disk;
|
|
blk_mode_t mode = file_to_blk_mode(file);
|
|
|
|
switch (cmd) {
|
|
/* These need separate implementations for the data structure */
|
|
case HDIO_GETGEO:
|
|
return compat_hdio_getgeo(bdev, argp);
|
|
case BLKPG:
|
|
return compat_blkpg_ioctl(bdev, argp);
|
|
|
|
/* Compat mode returns 32-bit data instead of 'long' */
|
|
case BLKRAGET:
|
|
case BLKFRAGET:
|
|
if (!argp)
|
|
return -EINVAL;
|
|
return compat_put_long(argp,
|
|
(bdev->bd_disk->bdi->ra_pages * PAGE_SIZE) / 512);
|
|
case BLKGETSIZE:
|
|
if (bdev_nr_sectors(bdev) > ~(compat_ulong_t)0)
|
|
return -EFBIG;
|
|
return compat_put_ulong(argp, bdev_nr_sectors(bdev));
|
|
|
|
/* The data is compatible, but the command number is different */
|
|
case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
|
|
return put_int(argp, bdev_logical_block_size(bdev));
|
|
case BLKBSZSET_32:
|
|
return blkdev_bszset(file, mode, argp);
|
|
case BLKGETSIZE64_32:
|
|
return put_u64(argp, bdev_nr_bytes(bdev));
|
|
|
|
/* Incompatible alignment on i386 */
|
|
case BLKTRACESETUP32:
|
|
return blk_trace_ioctl(bdev, cmd, argp);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = blkdev_common_ioctl(bdev, mode, cmd, arg, argp);
|
|
if (ret == -ENOIOCTLCMD && disk->fops->compat_ioctl)
|
|
ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
|
|
|
|
return ret;
|
|
}
|
|
#endif
|