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Date: Fri, 26 Aug 2022 23:58:51 -0700 From: Eric Biggers <ebiggers@...nel.org> To: linux-fsdevel@...r.kernel.org Cc: linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net, linux-xfs@...r.kernel.org, linux-api@...r.kernel.org, linux-fscrypt@...r.kernel.org, linux-block@...r.kernel.org, linux-kernel@...r.kernel.org, Keith Busch <kbusch@...nel.org> Subject: [PATCH v5 8/8] xfs: support STATX_DIOALIGN From: Eric Biggers <ebiggers@...gle.com> 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 <ebiggers@...gle.com> --- fs/xfs/xfs_iops.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index 45518b8c613c9a..f51c60d7e2054a 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; -- 2.37.2
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