D7273.diff
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	Index: head/sys/kern/vfs_aio.c
	===================================================================
	--- head/sys/kern/vfs_aio.c
	+++ head/sys/kern/vfs_aio.c
	@@ -1664,7 +1664,10 @@
	struct aioliojob *lj;
	struct kaioinfo *ki;
	struct kaiocb *job2;
	+ struct vnode *vp;
	+ struct mount *mp;
	int error, opcode;
	+ bool safe;

	lj = job->lio;
	ki = job->userproc->p_aioinfo;
	@@ -1685,7 +1688,16 @@
	goto done;
	#endif
	queueit:
	- if (!enable_aio_unsafe)
	+ safe = false;
	+ if (fp->f_type == DTYPE_VNODE) {
	+ vp = fp->f_vnode;
	+ if (vp->v_type == VREG \|\| vp->v_type == VDIR) {
	+ mp = fp->f_vnode->v_mount;
	+ if (mp == NULL \|\| (mp->mnt_flag & MNT_LOCAL) != 0)
	+ safe = true;
	+ }
	+ }
	+ if (!(safe \|\| enable_aio_unsafe))
	return (EOPNOTSUPP);

	if (opcode == LIO_SYNC) {