On Wed, Sep 02, 2020 at 12:06:01PM +0800, Xiao Yang wrote: > Current ioctl(FSSETXATTR) ignores unsupported xflags silently > so it is not clear for user to know unsupported xflags. > For example, use ioctl(FSSETXATTR) to set dax flag on kernel > v4.4 which doesn't support dax flag: > -------------------------------- > 0 > ----------------X testfile > -------------------------------- > > Add check to return -EOPNOTSUPP as ext4/f2fs/btrfs does. > > Signed-off-by: Xiao Yang <yangx.jy@xxxxxxxxxxxxxx> Looks good to me, Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> --D > --- > fs/xfs/xfs_ioctl.c | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > > diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c > index 6f22a66777cd..e188e81961bd 100644 > --- a/fs/xfs/xfs_ioctl.c > +++ b/fs/xfs/xfs_ioctl.c > @@ -1425,6 +1425,14 @@ xfs_ioctl_setattr_check_projid( > return 0; > } > > +#define XFS_SUPPORTED_FS_XFLAGS \ > + (FS_XFLAG_REALTIME | FS_XFLAG_PREALLOC | FS_XFLAG_IMMUTABLE | \ > + FS_XFLAG_APPEND | FS_XFLAG_SYNC | FS_XFLAG_NOATIME | FS_XFLAG_NODUMP | \ > + FS_XFLAG_RTINHERIT | FS_XFLAG_PROJINHERIT | FS_XFLAG_NOSYMLINKS | \ > + FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT | FS_XFLAG_NODEFRAG | \ > + FS_XFLAG_FILESTREAM | FS_XFLAG_DAX | FS_XFLAG_COWEXTSIZE | \ > + FS_XFLAG_HASATTR) > + > STATIC int > xfs_ioctl_setattr( > xfs_inode_t *ip, > @@ -1439,6 +1447,10 @@ xfs_ioctl_setattr( > > trace_xfs_ioctl_setattr(ip); > > + /* Check if fsx_xflags has unsupported xflags */ > + if (fa->fsx_xflags & ~XFS_SUPPORTED_FS_XFLAGS) > + return -EOPNOTSUPP; > + > code = xfs_ioctl_setattr_check_projid(ip, fa); > if (code) > return code; > -- > 2.25.1 > > >
