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Diffstat (limited to 'sbin/zfsbootcfg/zfsbootcfg.c')
-rw-r--r--sbin/zfsbootcfg/zfsbootcfg.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/sbin/zfsbootcfg/zfsbootcfg.c b/sbin/zfsbootcfg/zfsbootcfg.c
new file mode 100644
index 000000000000..096f1a4697e6
--- /dev/null
+++ b/sbin/zfsbootcfg/zfsbootcfg.c
@@ -0,0 +1,98 @@
+/*-
+ * Copyright (c) 2016 Andriy Gapon <avg@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <errno.h>
+#include <limits.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <kenv.h>
+
+#include <libzfs.h>
+
+/* Keep in sync with zfsboot.c. */
+#define MAX_COMMAND_LEN 512
+
+int main(int argc, const char * const *argv)
+{
+ char buf[32];
+ libzfs_handle_t *hdl;
+ uint64_t pool_guid;
+ uint64_t vdev_guid;
+ int zfs_fd;
+ int len;
+
+ if (argc != 2) {
+ fprintf(stderr, "usage: zfsbootcfg <boot.config(5) options>\n");
+ return (1);
+ }
+
+ len = strlen(argv[1]);
+ if (len >= MAX_COMMAND_LEN) {
+ fprintf(stderr, "options string is too long\n");
+ return (1);
+ }
+
+ if (kenv(KENV_GET, "vfs.zfs.boot.primary_pool", buf, sizeof(buf)) <= 0) {
+ perror("can't get vfs.zfs.boot.primary_pool");
+ return (1);
+ }
+ pool_guid = strtoumax(buf, NULL, 10);
+ if (pool_guid == 0) {
+ perror("can't parse vfs.zfs.boot.primary_pool");
+ return (1);
+ }
+
+ if (kenv(KENV_GET, "vfs.zfs.boot.primary_vdev", buf, sizeof(buf)) <= 0) {
+ perror("can't get vfs.zfs.boot.primary_vdev");
+ return (1);
+ }
+ vdev_guid = strtoumax(buf, NULL, 10);
+ if (vdev_guid == 0) {
+ perror("can't parse vfs.zfs.boot.primary_vdev");
+ return (1);
+ }
+
+ if ((hdl = libzfs_init()) == NULL) {
+ (void) fprintf(stderr, "internal error: failed to "
+ "initialize ZFS library\n");
+ return (1);
+ }
+
+ if (zpool_nextboot(hdl, pool_guid, vdev_guid, argv[1]) != 0) {
+ perror("ZFS_IOC_NEXTBOOT failed");
+ libzfs_fini(hdl);
+ return (1);
+ }
+
+ libzfs_fini(hdl);
+ printf("zfs next boot options are successfully written\n");
+ return (0);
+}