From 214eccf4b6663f4676b98004b27ca76275ba6d8b Mon Sep 17 00:00:00 2001
From: Mateusz Guzik <mjg@FreeBSD.org>
Date: Thu, 15 Oct 2020 04:48:14 +0000
Subject: [PATCH] vfs: add VOP_EAGAIN

Can be used to stub fplookup for example.
---
 sys/kern/vfs_default.c | 7 +++++++
 sys/sys/vnode.h        | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/sys/kern/vfs_default.c b/sys/kern/vfs_default.c
index 93b3a288732a..63392a4083df 100644
--- a/sys/kern/vfs_default.c
+++ b/sys/kern/vfs_default.c
@@ -197,6 +197,13 @@ vop_enoent(struct vop_generic_args *ap)
 	return (ENOENT);
 }
 
+int
+vop_eagain(struct vop_generic_args *ap)
+{
+
+	return (EAGAIN);
+}
+
 int
 vop_null(struct vop_generic_args *ap)
 {
diff --git a/sys/sys/vnode.h b/sys/sys/vnode.h
index 8b2f94d361de..6b2e54ae587f 100644
--- a/sys/sys/vnode.h
+++ b/sys/sys/vnode.h
@@ -828,6 +828,7 @@ int	vop_ebadf(struct vop_generic_args *ap);
 int	vop_einval(struct vop_generic_args *ap);
 int	vop_enoent(struct vop_generic_args *ap);
 int	vop_enotty(struct vop_generic_args *ap);
+int	vop_eagain(struct vop_generic_args *ap);
 int	vop_null(struct vop_generic_args *ap);
 int	vop_panic(struct vop_generic_args *ap);
 int	dead_poll(struct vop_poll_args *ap);
@@ -1001,6 +1002,7 @@ extern struct vop_vector default_vnodeops;
 #define VOP_EINVAL	((void*)(uintptr_t)vop_einval)
 #define VOP_ENOENT	((void*)(uintptr_t)vop_enoent)
 #define VOP_EOPNOTSUPP	((void*)(uintptr_t)vop_eopnotsupp)
+#define VOP_EAGAIN	((void*)(uintptr_t)vop_eagain)
 
 /* fifo_vnops.c */
 int	fifo_printinfo(struct vnode *);