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diff --git a/sbin/reboot/reboot.c b/sbin/reboot/reboot.c
--- a/sbin/reboot/reboot.c
+++ b/sbin/reboot/reboot.c
@@ -31,6 +31,7 @@
#include <sys/types.h>
#include <sys/boottrace.h>
+#include <sys/mount.h>
#include <sys/reboot.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
@@ -56,11 +57,6 @@
static bool dohalt;
-static void
-write_nextboot(const char *fn, const char *kernel, bool force)
-{
- FILE *fp;
-
#define E(...) do { \
if (force) { \
warn( __VA_ARGS__ ); \
@@ -69,13 +65,58 @@
err(1, __VA_ARGS__); \
} while (0) \
+static void
+zfsbootcfg(const char *pool, bool force)
+{
+ char *k;
+ int rv;
+
+ asprintf(&k,
+ "zfsbootcfg -z %s -n freebsd:nvstore -k nextboot_enable -v YES",
+ pool);
+ if (k == NULL)
+ E("No memory for zfsbootcfg");
+
+ rv = system(k);
+ if (rv == 0)
+ return;
+ if (rv == -1)
+ E("system zfsbootcfg");
+ if (rv == 127)
+ E("zfsbootcfg not found in path");
+ E("zfsbootcfg returned %d", rv);
+}
+
+static void
+write_nextboot(const char *fn, const char *kernel, bool force)
+{
+ FILE *fp;
+ struct statfs sfs;
+ bool supported = false;
+ bool zfs = false;
+
+ if (statfs("/boot", &sfs) != 0)
+ err(1, "statfs /boot");
+ if (strcmp(sfs.f_fstypename, "ufs") == 0) {
+ /*
+ * Only UFS supports the full nextboot protocol.
+ */
+ supported = true;
+ } else if (strcmp(sfs.f_fstypename, "zfs") == 0) {
+ zfs = true;
+ }
+
+ if (zfs) {
+ zfsbootcfg(sfs.f_mntfromname, force);
+ }
+
fp = fopen(fn, "w");
if (fp == NULL)
E("Can't create %s to boot %s", fn, kernel);
- if (fprintf(fp,
- "nextboot_enable=\"YES\"\n"
- "kernel=\"%s\"\n", kernel) < 0) {
+ if (fprintf(fp,"%skernel=\"%s\"\n",
+ supported ? "nextboot_enable=\"YES\"\n" : "",
+ kernel) < 0) {
int e;
e = errno;
@@ -86,7 +127,6 @@
E("Can't write %s", fn);
}
fclose(fp);
-#undef E
}

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