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Diffstat (limited to 'block/ioctl.c')
-rw-r--r--block/ioctl.c85
1 files changed, 60 insertions, 25 deletions
diff --git a/block/ioctl.c b/block/ioctl.c
index a9028a2c2db5..d570e1695896 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -33,7 +33,7 @@ static int blkpg_do_ioctl(struct block_device *bdev,
if (op == BLKPG_DEL_PARTITION)
return bdev_del_partition(disk, p.pno);
- if (p.start < 0 || p.length <= 0 || p.start + p.length < 0)
+ if (p.start < 0 || p.length <= 0 || LLONG_MAX - p.length < p.start)
return -EINVAL;
/* Check that the partition is aligned to the block size */
if (!IS_ALIGNED(p.start | p.length, bdev_logical_block_size(bdev)))
@@ -95,9 +95,11 @@ static int compat_blkpg_ioctl(struct block_device *bdev,
static int blk_ioctl_discard(struct block_device *bdev, blk_mode_t mode,
unsigned long arg)
{
- uint64_t range[2];
- uint64_t start, len, end;
- struct inode *inode = bdev->bd_inode;
+ unsigned int bs_mask = bdev_logical_block_size(bdev) - 1;
+ uint64_t range[2], start, len, end;
+ struct bio *prev = NULL, *bio;
+ sector_t sector, nr_sects;
+ struct blk_plug plug;
int err;
if (!(mode & BLK_OPEN_WRITE))
@@ -105,6 +107,8 @@ static int blk_ioctl_discard(struct block_device *bdev, blk_mode_t mode,
if (!bdev_max_discard_sectors(bdev))
return -EOPNOTSUPP;
+ if (bdev_read_only(bdev))
+ return -EPERM;
if (copy_from_user(range, (void __user *)arg, sizeof(range)))
return -EFAULT;
@@ -112,22 +116,47 @@ static int blk_ioctl_discard(struct block_device *bdev, blk_mode_t mode,
start = range[0];
len = range[1];
- if (start & 511)
+ if (!len)
return -EINVAL;
- if (len & 511)
+ if ((start | len) & bs_mask)
return -EINVAL;
if (check_add_overflow(start, len, &end) ||
end > bdev_nr_bytes(bdev))
return -EINVAL;
- filemap_invalidate_lock(inode->i_mapping);
+ filemap_invalidate_lock(bdev->bd_mapping);
err = truncate_bdev_range(bdev, mode, start, start + len - 1);
if (err)
goto fail;
- err = blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL);
+
+ sector = start >> SECTOR_SHIFT;
+ nr_sects = len >> SECTOR_SHIFT;
+
+ blk_start_plug(&plug);
+ while (1) {
+ if (fatal_signal_pending(current)) {
+ if (prev)
+ bio_await_chain(prev);
+ err = -EINTR;
+ goto out_unplug;
+ }
+ bio = blk_alloc_discard_bio(bdev, &sector, &nr_sects,
+ GFP_KERNEL);
+ if (!bio)
+ break;
+ prev = bio_chain_and_submit(prev, bio);
+ }
+ if (prev) {
+ err = submit_bio_wait(prev);
+ if (err == -EOPNOTSUPP)
+ err = 0;
+ bio_put(prev);
+ }
+out_unplug:
+ blk_finish_plug(&plug);
fail:
- filemap_invalidate_unlock(inode->i_mapping);
+ filemap_invalidate_unlock(bdev->bd_mapping);
return err;
}
@@ -152,12 +181,12 @@ static int blk_ioctl_secure_erase(struct block_device *bdev, blk_mode_t mode,
if (start + len > bdev_nr_bytes(bdev))
return -EINVAL;
- filemap_invalidate_lock(bdev->bd_inode->i_mapping);
+ filemap_invalidate_lock(bdev->bd_mapping);
err = truncate_bdev_range(bdev, mode, start, start + len - 1);
if (!err)
err = blkdev_issue_secure_erase(bdev, start >> 9, len >> 9,
GFP_KERNEL);
- filemap_invalidate_unlock(bdev->bd_inode->i_mapping);
+ filemap_invalidate_unlock(bdev->bd_mapping);
return err;
}
@@ -167,7 +196,6 @@ static int blk_ioctl_zeroout(struct block_device *bdev, blk_mode_t mode,
{
uint64_t range[2];
uint64_t start, end, len;
- struct inode *inode = bdev->bd_inode;
int err;
if (!(mode & BLK_OPEN_WRITE))
@@ -190,7 +218,7 @@ static int blk_ioctl_zeroout(struct block_device *bdev, blk_mode_t mode,
return -EINVAL;
/* Invalidate the page cache, including dirty pages */
- filemap_invalidate_lock(inode->i_mapping);
+ filemap_invalidate_lock(bdev->bd_mapping);
err = truncate_bdev_range(bdev, mode, start, end);
if (err)
goto fail;
@@ -199,7 +227,7 @@ static int blk_ioctl_zeroout(struct block_device *bdev, blk_mode_t mode,
BLKDEV_ZERO_NOUNMAP);
fail:
- filemap_invalidate_unlock(inode->i_mapping);
+ filemap_invalidate_unlock(bdev->bd_mapping);
return err;
}
@@ -403,7 +431,10 @@ static int blkdev_roset(struct block_device *bdev, unsigned cmd,
if (ret)
return ret;
}
- bdev->bd_read_only = n;
+ if (n)
+ bdev_set_flag(bdev, BD_READ_ONLY);
+ else
+ bdev_clear_flag(bdev, BD_READ_ONLY);
return 0;
}
@@ -473,11 +504,14 @@ static int compat_hdio_getgeo(struct block_device *bdev,
#endif
/* set the logical block size */
-static int blkdev_bszset(struct block_device *bdev, blk_mode_t mode,
+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;
- struct file *file;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
@@ -487,13 +521,13 @@ static int blkdev_bszset(struct block_device *bdev, blk_mode_t mode,
return -EFAULT;
if (mode & BLK_OPEN_EXCL)
- return set_blocksize(bdev, n);
+ return set_blocksize(file, n);
- file = bdev_file_open_by_dev(bdev->bd_dev, mode, &bdev, NULL);
- if (IS_ERR(file))
+ excl_file = bdev_file_open_by_dev(dev, mode, &dev, NULL);
+ if (IS_ERR(excl_file))
return -EBUSY;
- ret = set_blocksize(bdev, n);
- fput(file);
+ ret = set_blocksize(excl_file, n);
+ fput(excl_file);
return ret;
}
@@ -563,7 +597,8 @@ static int blkdev_common_ioctl(struct block_device *bdev, blk_mode_t mode,
return -EACCES;
if (bdev_is_partition(bdev))
return -EINVAL;
- return disk_scan_partitions(bdev->bd_disk, mode);
+ return disk_scan_partitions(bdev->bd_disk,
+ mode | BLK_OPEN_STRICT_SCAN);
case BLKTRACESTART:
case BLKTRACESTOP:
case BLKTRACETEARDOWN:
@@ -621,7 +656,7 @@ long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
case BLKBSZGET: /* get block device soft block size (cf. BLKSSZGET) */
return put_int(argp, block_size(bdev));
case BLKBSZSET:
- return blkdev_bszset(bdev, mode, argp);
+ return blkdev_bszset(file, mode, argp);
case BLKGETSIZE64:
return put_u64(argp, bdev_nr_bytes(bdev));
@@ -681,7 +716,7 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
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(bdev, mode, argp);
+ return blkdev_bszset(file, mode, argp);
case BLKGETSIZE64_32:
return put_u64(argp, bdev_nr_bytes(bdev));
generated by cgit (git 2.34.1) at 2024-05-22 04:01:22 +0000