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xfs: add a xfs_inode_buftarg helper

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Add a new xfs_inode_buftarg helper that gets the data I/O buftarg for a
given inode.  Replace the existing xfs_find_bdev_for_inode and
xfs_find_daxdev_for_inode helpers with this new general one and cleanup
some of the callers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig
2019-10-24 22:25:38 -07:00
committed by Darrick J. Wong
parent 25a409572b
commit 30fa529e3b
8 changed files with 38 additions and 55 deletions
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7
fs/xfs/xfs_ioctl.c
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@@ -1311,10 +1311,9 @@ xfs_ioctl_setattr_dax_invalidate(
* have to check the device for dax support or flush pagecache.
*/
if (fa->fsx_xflags & FS_XFLAG_DAX) {
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
return -EINVAL;
if (!bdev_dax_supported(xfs_find_bdev_for_inode(VFS_I(ip)),
sb->s_blocksize))
struct xfs_buftarg *target = xfs_inode_buftarg(ip);
if (!bdev_dax_supported(target->bt_bdev, sb->s_blocksize))
return -EINVAL;
}