From 61a223df421f698c253143014cfd384255b3cf1e Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Fri, 26 Aug 2022 23:58:51 -0700 Subject: xfs: support STATX_DIOALIGN Add support for STATX_DIOALIGN to xfs, so that direct I/O alignment restrictions are exposed to userspace in a generic way. Signed-off-by: Eric Biggers Reviewed-by: Christoph Hellwig Reviewed-by: Darrick J. Wong Link: https://lore.kernel.org/r/20220827065851.135710-9-ebiggers@kernel.org --- fs/xfs/xfs_iops.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'fs') diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index 45518b8c613c..f51c60d7e205 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -604,6 +604,16 @@ xfs_vn_getattr( stat->blksize = BLKDEV_IOSIZE; stat->rdev = inode->i_rdev; break; + case S_IFREG: + if (request_mask & STATX_DIOALIGN) { + struct xfs_buftarg *target = xfs_inode_buftarg(ip); + struct block_device *bdev = target->bt_bdev; + + stat->result_mask |= STATX_DIOALIGN; + stat->dio_mem_align = bdev_dma_alignment(bdev) + 1; + stat->dio_offset_align = bdev_logical_block_size(bdev); + } + fallthrough; default: stat->blksize = xfs_stat_blksize(ip); stat->rdev = 0; -- cgit v1.2.3