Commits
Nick Bowler committed a9d25bde1e9
xfs: Fix x32 ioctls when cmd numbers differ from ia32. Several ioctl structs change size between native 32-bit (ia32) and x32 applications, because x32 follows the native 64-bit (amd64) integer alignment rules and uses 64-bit time_t. In these instances, the ioctl number changes so userspace simply gets -ENOTTY. This scenario can be handled by simply adding more cases. Looking at the different ioctls implemented here: - All the ones marked 'No size or alignment issue on any arch' should presumably all be fine. - All the ones under BROKEN_X86_ALIGNMENT are different under integer alignment rules. Since x32 matches amd64 here, we just need both sets of cases handled. - XFS_IOC_SWAPEXT has both integer alignment differences and time_t differences. Since x32 matches amd64 here, we need to add a case which calls the native implementation. - The remaining ioctls have neither 64-bit integers nor time_t, so x32 matches ia32 here and no change is required at this level. The bulkstat ioctl implementations have some pointer chasing which is handled separately. Signed-off-by: Nick Bowler <nbowler@draconx.ca> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>