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btrfs: use bdev_nr_bytes instead of open coding it 

Use the proper helper to read the block device size.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Acked-by: David Sterba <dsterba@suse.com>
Link: https://lore.kernel.org/r/20211018101130.1838532-13-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-10-18 12:11:12 +02:00 committed by Jens Axboe
parent 589aa7bc40
commit cda00eba02
4 changed files with 8 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/btrfs/dev-replace.c
View File

@ -283,8 +283,7 @@ static int btrfs_init_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
}
if (i_size_read(bdev->bd_inode) <
btrfs_device_get_total_bytes(srcdev)) {
if (bdev_nr_bytes(bdev) < btrfs_device_get_total_bytes(srcdev)) {
btrfs_err(fs_info,
"target device is smaller than source device!");
ret = -EINVAL;

2
fs/btrfs/disk-io.c
View File

@ -3740,7 +3740,7 @@ struct btrfs_super_block *btrfs_read_dev_one_super(struct block_device *bdev,
else if (ret)
return ERR_PTR(ret);
if (bytenr + BTRFS_SUPER_INFO_SIZE >= i_size_read(bdev->bd_inode))
if (bytenr + BTRFS_SUPER_INFO_SIZE >= bdev_nr_bytes(bdev))
return ERR_PTR(-EINVAL);
page = read_cache_page_gfp(mapping, bytenr >> PAGE_SHIFT, GFP_NOFS);

4
fs/btrfs/ioctl.c
View File

@ -1730,7 +1730,7 @@ static noinline int btrfs_ioctl_resize(struct file *file,
}
if (!strcmp(sizestr, "max"))
new_size = device->bdev->bd_inode->i_size;
new_size = bdev_nr_bytes(device->bdev);
else {
if (sizestr[0] == '-') {
mod = -1;
@ -1771,7 +1771,7 @@ static noinline int btrfs_ioctl_resize(struct file *file,
ret = -EINVAL;
goto out_finish;
}
if (new_size > device->bdev->bd_inode->i_size) {
if (new_size > bdev_nr_bytes(device->bdev)) {
ret = -EFBIG;
goto out_finish;
}

8
fs/btrfs/volumes.c
View File

@ -1286,7 +1286,7 @@ static struct btrfs_super_block *btrfs_read_disk_super(struct block_device *bdev
pgoff_t index;
/* make sure our super fits in the device */
if (bytenr + PAGE_SIZE >= i_size_read(bdev->bd_inode))
if (bytenr + PAGE_SIZE >= bdev_nr_bytes(bdev))
return ERR_PTR(-EINVAL);
/* make sure our super fits in the page */
@ -2610,8 +2610,8 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
device->io_width = fs_info->sectorsize;
device->io_align = fs_info->sectorsize;
device->sector_size = fs_info->sectorsize;
device->total_bytes = round_down(i_size_read(bdev->bd_inode),
fs_info->sectorsize);
device->total_bytes =
round_down(bdev_nr_bytes(bdev), fs_info->sectorsize);
device->disk_total_bytes = device->total_bytes;
device->commit_total_bytes = device->total_bytes;
set_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
@ -7236,7 +7236,7 @@ static int read_one_dev(struct extent_buffer *leaf,
fill_device_from_item(leaf, dev_item, device);
if (device->bdev) {
u64 max_total_bytes = i_size_read(device->bdev->bd_inode);
u64 max_total_bytes = bdev_nr_bytes(device->bdev);
if (device->total_bytes > max_total_bytes) {
btrfs_err(fs_info,