freebsd: changes necessary to coexist with dtrace in tree

Fix header conflicts when building zfs with openzfs as a vendor import.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #10497

module/Makefile.bsd

@@ -331,6 +331,7 @@ CFLAGS.fm.c= -Wno-cast-qual
 CFLAGS.lz4.c= -Wno-cast-qual
 CFLAGS.spa.c= -Wno-cast-qual
 CFLAGS.spa_misc.c= -Wno-cast-qual
+CFLAGS.sysctl_os.c= -include ../zfs_config.h
 CFLAGS.vdev_raidz.c= -Wno-cast-qual
 CFLAGS.vdev_raidz_math.c= -Wno-cast-qual
 CFLAGS.vdev_raidz_math_scalar.c= -Wno-cast-qual

module/os/freebsd/spl/spl_misc.c

@@ -34,15 +34,24 @@ __FBSDID("$FreeBSD$");
 #include <sys/limits.h>
 #include <sys/misc.h>
 #include <sys/sysctl.h>
+#include <sys/vnode.h>
 
 #include <sys/zfs_context.h>
 
-char hw_serial[11] = "0";
-
 static struct opensolaris_utsname hw_utsname = {
 	.machine = MACHINE
 };
 
+#ifndef KERNEL_STATIC
+char hw_serial[11] = "0";
+
+utsname_t *
+utsname(void)
+{
+	return (&hw_utsname);
+}
+#endif
+
 static void
 opensolaris_utsname_init(void *arg)
 {
@@ -98,10 +107,6 @@ spl_panic(const char *file, const char *func, int line, const char *fmt, ...)
 	va_end(ap);
 }
 
-utsname_t *
-utsname(void)
-{
-	return (&hw_utsname);
-}
+
 SYSINIT(opensolaris_utsname_init, SI_SUB_TUNABLES, SI_ORDER_ANY,
     opensolaris_utsname_init, NULL);

module/os/freebsd/spl/spl_sysevent.c

@@ -33,6 +33,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/systm.h>
 #include <sys/malloc.h>
 #include <sys/kmem.h>
+#include <sys/list.h>
 #include <sys/sbuf.h>
 #include <sys/nvpair.h>
 #include <sys/sunddi.h>

module/os/freebsd/zfs/arc_os.c

@@ -44,6 +44,7 @@
 #include <sys/arc_impl.h>
 #include <sys/sdt.h>
 #include <sys/aggsum.h>
+#include <sys/vnode.h>
 #include <cityhash.h>
 
 extern struct vfsops zfs_vfsops;

module/os/freebsd/zfs/sysctl_os.c

@@ -90,7 +90,6 @@ __FBSDID("$FreeBSD$");
 #include <sys/arc_impl.h>
 #include <sys/dsl_pool.h>
 
-#include <../zfs_config.h>
 
 /* BEGIN CSTYLED */
 SYSCTL_DECL(_vfs_zfs);
@@ -124,10 +123,11 @@ SYSCTL_NODE(_vfs_zfs_vdev, OID_AUTO, cache, CTLFLAG_RW, 0, "ZFS VDEV Cache");
 SYSCTL_NODE(_vfs_zfs_vdev, OID_AUTO, mirror, CTLFLAG_RD, 0,
     "ZFS VDEV mirror");
 
+#ifdef ZFS_META_VERSION
 SYSCTL_DECL(_vfs_zfs_version);
 SYSCTL_CONST_STRING(_vfs_zfs_version, OID_AUTO, module, CTLFLAG_RD,
     (ZFS_META_VERSION "-" ZFS_META_RELEASE), "OpenZFS module version");
-
+#endif
 extern arc_state_t ARC_anon;
 extern arc_state_t ARC_mru;
 extern arc_state_t ARC_mru_ghost;

module/os/freebsd/zfs/vdev_file.c

@@ -25,6 +25,7 @@
 
 #include <sys/zfs_context.h>
 #include <sys/spa.h>
+#include <sys/file.h>
 #include <sys/vdev_file.h>
 #include <sys/vdev_impl.h>
 #include <sys/zio.h>

module/os/freebsd/zfs/vdev_geom.c

@@ -29,6 +29,7 @@
 #include <sys/param.h>
 #include <sys/kernel.h>
 #include <sys/bio.h>
+#include <sys/file.h>
 #include <sys/spa.h>
 #include <sys/spa_impl.h>
 #include <sys/vdev_impl.h>

module/zfs/spa_config.c

@@ -27,6 +27,7 @@
  */
 
 #include <sys/spa.h>
+#include <sys/file.h>
 #include <sys/fm/fs/zfs.h>
 #include <sys/spa_impl.h>
 #include <sys/nvpair.h>