diff --git a/unix/syscall_aix_ppc.go b/unix/syscall_aix_ppc.go
index bf05603f..b3c8e330 100644
--- a/unix/syscall_aix_ppc.go
+++ b/unix/syscall_aix_ppc.go
@@ -29,6 +29,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_aix_ppc64.go b/unix/syscall_aix_ppc64.go
index 13d4321f..9a6e0241 100644
--- a/unix/syscall_aix_ppc64.go
+++ b/unix/syscall_aix_ppc64.go
@@ -29,6 +29,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_darwin_386.go b/unix/syscall_darwin_386.go
index cd8be182..1a074085 100644
--- a/unix/syscall_darwin_386.go
+++ b/unix/syscall_darwin_386.go
@@ -45,6 +45,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_darwin_amd64.go b/unix/syscall_darwin_amd64.go
index d0d07243..55b8983e 100644
--- a/unix/syscall_darwin_amd64.go
+++ b/unix/syscall_darwin_amd64.go
@@ -45,6 +45,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_darwin_arm.go b/unix/syscall_darwin_arm.go
index 01e8a38a..85e377b7 100644
--- a/unix/syscall_darwin_arm.go
+++ b/unix/syscall_darwin_arm.go
@@ -45,6 +45,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_darwin_arm64.go b/unix/syscall_darwin_arm64.go
index e674f81d..109d7314 100644
--- a/unix/syscall_darwin_arm64.go
+++ b/unix/syscall_darwin_arm64.go
@@ -47,6 +47,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_dragonfly_amd64.go b/unix/syscall_dragonfly_amd64.go
index 9babb31e..a6b4830a 100644
--- a/unix/syscall_dragonfly_amd64.go
+++ b/unix/syscall_dragonfly_amd64.go
@@ -33,6 +33,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_freebsd_386.go b/unix/syscall_freebsd_386.go
index 21e03958..dcc56457 100644
--- a/unix/syscall_freebsd_386.go
+++ b/unix/syscall_freebsd_386.go
@@ -33,6 +33,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_freebsd_amd64.go b/unix/syscall_freebsd_amd64.go
index 9c945a65..321c3bac 100644
--- a/unix/syscall_freebsd_amd64.go
+++ b/unix/syscall_freebsd_amd64.go
@@ -33,6 +33,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_freebsd_arm.go b/unix/syscall_freebsd_arm.go
index 5cd6243f..69770083 100644
--- a/unix/syscall_freebsd_arm.go
+++ b/unix/syscall_freebsd_arm.go
@@ -33,6 +33,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_freebsd_arm64.go b/unix/syscall_freebsd_arm64.go
index a3180548..dbbbfd60 100644
--- a/unix/syscall_freebsd_arm64.go
+++ b/unix/syscall_freebsd_arm64.go
@@ -33,6 +33,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_linux_386.go b/unix/syscall_linux_386.go
index e2f8cf6e..e7fa665e 100644
--- a/unix/syscall_linux_386.go
+++ b/unix/syscall_linux_386.go
@@ -372,6 +372,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_linux_amd64.go b/unix/syscall_linux_amd64.go
index 87a30744..088ce0f9 100644
--- a/unix/syscall_linux_amd64.go
+++ b/unix/syscall_linux_amd64.go
@@ -163,6 +163,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint64(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint64(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
diff --git a/unix/syscall_linux_arm.go b/unix/syscall_linux_arm.go
index f6267944..11930fc8 100644
--- a/unix/syscall_linux_arm.go
+++ b/unix/syscall_linux_arm.go
@@ -252,6 +252,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_linux_arm64.go b/unix/syscall_linux_arm64.go
index cb20b15d..251e2d97 100644
--- a/unix/syscall_linux_arm64.go
+++ b/unix/syscall_linux_arm64.go
@@ -180,6 +180,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint64(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint64(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
diff --git a/unix/syscall_linux_mips64x.go b/unix/syscall_linux_mips64x.go
index b3b21ec1..7562fe97 100644
--- a/unix/syscall_linux_mips64x.go
+++ b/unix/syscall_linux_mips64x.go
@@ -208,6 +208,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint64(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint64(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
diff --git a/unix/syscall_linux_mipsx.go b/unix/syscall_linux_mipsx.go
index 5144d4e1..a939ff8f 100644
--- a/unix/syscall_linux_mipsx.go
+++ b/unix/syscall_linux_mipsx.go
@@ -220,6 +220,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_linux_ppc64x.go b/unix/syscall_linux_ppc64x.go
index 0a100b66..28d6d0f2 100644
--- a/unix/syscall_linux_ppc64x.go
+++ b/unix/syscall_linux_ppc64x.go
@@ -91,6 +91,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint64(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint64(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
diff --git a/unix/syscall_linux_riscv64.go b/unix/syscall_linux_riscv64.go
index 6230f640..6798c262 100644
--- a/unix/syscall_linux_riscv64.go
+++ b/unix/syscall_linux_riscv64.go
@@ -179,6 +179,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint64(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint64(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
diff --git a/unix/syscall_linux_s390x.go b/unix/syscall_linux_s390x.go
index f81dbdc9..eb5cb1a7 100644
--- a/unix/syscall_linux_s390x.go
+++ b/unix/syscall_linux_s390x.go
@@ -120,6 +120,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint64(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint64(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
diff --git a/unix/syscall_linux_sparc64.go b/unix/syscall_linux_sparc64.go
index b6956561..37321c12 100644
--- a/unix/syscall_linux_sparc64.go
+++ b/unix/syscall_linux_sparc64.go
@@ -107,6 +107,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint64(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint64(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint64(length)
 }
diff --git a/unix/syscall_netbsd_386.go b/unix/syscall_netbsd_386.go
index 24f74e58..24da8b52 100644
--- a/unix/syscall_netbsd_386.go
+++ b/unix/syscall_netbsd_386.go
@@ -28,6 +28,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_netbsd_amd64.go b/unix/syscall_netbsd_amd64.go
index 6878bf7f..25a0ac82 100644
--- a/unix/syscall_netbsd_amd64.go
+++ b/unix/syscall_netbsd_amd64.go
@@ -28,6 +28,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_netbsd_arm.go b/unix/syscall_netbsd_arm.go
index dbbfcf71..21591ecd 100644
--- a/unix/syscall_netbsd_arm.go
+++ b/unix/syscall_netbsd_arm.go
@@ -28,6 +28,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_netbsd_arm64.go b/unix/syscall_netbsd_arm64.go
index f3434465..80474963 100644
--- a/unix/syscall_netbsd_arm64.go
+++ b/unix/syscall_netbsd_arm64.go
@@ -28,6 +28,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = int32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_openbsd_386.go b/unix/syscall_openbsd_386.go
index d62da60d..42b5a0e5 100644
--- a/unix/syscall_openbsd_386.go
+++ b/unix/syscall_openbsd_386.go
@@ -28,6 +28,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_openbsd_amd64.go b/unix/syscall_openbsd_amd64.go
index 9a35334c..6ea4b488 100644
--- a/unix/syscall_openbsd_amd64.go
+++ b/unix/syscall_openbsd_amd64.go
@@ -28,6 +28,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_openbsd_arm.go b/unix/syscall_openbsd_arm.go
index 5d812aae..1c3d26fa 100644
--- a/unix/syscall_openbsd_arm.go
+++ b/unix/syscall_openbsd_arm.go
@@ -28,6 +28,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }
diff --git a/unix/syscall_openbsd_arm64.go b/unix/syscall_openbsd_arm64.go
index 0fb39cf5..a8c458cb 100644
--- a/unix/syscall_openbsd_arm64.go
+++ b/unix/syscall_openbsd_arm64.go
@@ -28,6 +28,10 @@ func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = uint32(length)
 }
 
+func (msghdr *Msghdr) SetIovlen(length int) {
+	msghdr.Iovlen = uint32(length)
+}
+
 func (cmsg *Cmsghdr) SetLen(length int) {
 	cmsg.Len = uint32(length)
 }