xfs: Align compat attrlist_by_handle with native implementation.
authorNick Bowler <nbowler@draconx.ca>
Mon, 17 Dec 2018 17:35:27 +0000 (09:35 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 5 Dec 2019 14:37:33 +0000 (15:37 +0100)
commit05ec56052bb9f14986b3ff0b05518f2a91874c0f
tree465885d680f0e5d0d8a2d078fce53bfe2d93ed5e
parentfff825f248888723a2aec73d031754098bf3ebf1
xfs: Align compat attrlist_by_handle with native implementation.

[ Upstream commit c456d64449efe37da50832b63d91652a85ea1d20 ]

While inspecting the ioctl implementations, I noticed that the compat
implementation of XFS_IOC_ATTRLIST_BY_HANDLE does not do exactly the
same thing as the native implementation.  Specifically, the "cursor"
does not appear to be written out to userspace on the compat path,
like it is on the native path.

This adjusts the compat implementation to copy out the cursor just
like the native implementation does.  The attrlist cursor does not
require any special compat handling.  This fixes xfstests xfs/269
on both IA-32 and x32 userspace, when running on an amd64 kernel.

Signed-off-by: Nick Bowler <nbowler@draconx.ca>
Fixes: 0facef7fb053b ("xfs: in _attrlist_by_handle, copy the cursor back to userspace")
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
fs/xfs/xfs_ioctl32.c