1 files changed, 293 insertions, 0 deletions
diff --git a/sys/boot/userboot/userboot/main.c b/sys/boot/userboot/userboot/main.c
new file mode 100644
index 000000000000..87733cd659a9
--- /dev/null
+++ b/sys/boot/userboot/userboot/main.c
@@ -0,0 +1,293 @@
+/*-
+ * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
+ * Copyright (c) 1998,2000 Doug Rabson <dfr@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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 <stand.h>
+#include <string.h>
+#include <setjmp.h>
+
+#include "bootstrap.h"
+#include "disk.h"
+#include "libuserboot.h"
+
+#if defined(USERBOOT_ZFS_SUPPORT)
+#include "../zfs/libzfs.h"
+
+static void userboot_zfs_probe(void);
+static int userboot_zfs_found;
+#endif
+
+/* Minimum version required */
+#define	USERBOOT_VERSION	USERBOOT_VERSION_3
+
+#define	MALLOCSZ		(64*1024*1024)
+
+struct loader_callbacks *callbacks;
+void *callbacks_arg;
+
+extern char bootprog_info[];
+static jmp_buf jb;
+
+struct arch_switch archsw;	/* MI/MD interface boundary */
+
+static void	extract_currdev(void);
+
+void
+delay(int usec)
+{
+
+	CALLBACK(delay, usec);
+}
+
+void
+exit(int v)
+{
+
+	CALLBACK(exit, v);
+	longjmp(jb, 1);
+}
+
+void
+loader_main(struct loader_callbacks *cb, void *arg, int version, int ndisks)
+{
+	static char mallocbuf[MALLOCSZ];
+	const char *var;
+	int i;
+
+	if (version < USERBOOT_VERSION)
+		abort();
+
+	callbacks = cb;
+	callbacks_arg = arg;
+	userboot_disk_maxunit = ndisks;
+
+	/*
+	 * initialise the heap as early as possible.  Once this is done,
+	 * alloc() is usable.
+	 */
+	setheap((void *)mallocbuf, (void *)(mallocbuf + sizeof(mallocbuf)));
+
+	/*
+	 * Hook up the console
+	 */
+	cons_probe();
+
+	printf("\n%s", bootprog_info);
+#if 0
+	printf("Memory: %ld k\n", memsize() / 1024);
+#endif
+
+	setenv("LINES", "24", 1);	/* optional */
+
+	/*
+	 * Set custom environment variables
+	 */
+	i = 0;
+	while (1) {
+		var = CALLBACK(getenv, i++);
+		if (var == NULL)
+			break;
+		putenv(var);
+	}
+
+	archsw.arch_autoload = userboot_autoload;
+	archsw.arch_getdev = userboot_getdev;
+	archsw.arch_copyin = userboot_copyin;
+	archsw.arch_copyout = userboot_copyout;
+	archsw.arch_readin = userboot_readin;
+#if defined(USERBOOT_ZFS_SUPPORT)
+	archsw.arch_zfs_probe = userboot_zfs_probe;
+#endif
+
+	/*
+	 * Initialise the block cache. Set the upper limit.
+	 */
+	bcache_init(32768, 512);
+	/*
+	 * March through the device switch probing for things.
+	 */
+	for (i = 0; devsw[i] != NULL; i++)
+		if (devsw[i]->dv_init != NULL)
+			(devsw[i]->dv_init)();
+
+	extract_currdev();
+
+	if (setjmp(jb))
+		return;
+
+	interact(NULL);			/* doesn't return */
+
+	exit(0);
+}
+
+/*
+ * Set the 'current device' by (if possible) recovering the boot device as 
+ * supplied by the initial bootstrap.
+ */
+static void
+extract_currdev(void)
+{
+	struct disk_devdesc dev;
+
+	//bzero(&dev, sizeof(dev));
+
+#if defined(USERBOOT_ZFS_SUPPORT)
+	if (userboot_zfs_found) {
+		struct zfs_devdesc zdev;
+	
+		/* Leave the pool/root guid's unassigned */
+		bzero(&zdev, sizeof(zdev));
+		zdev.d_dev = &zfs_dev;
+		zdev.d_type = zdev.d_dev->dv_type;
+		
+		dev = *(struct disk_devdesc *)&zdev;
+		init_zfs_bootenv(zfs_fmtdev(&dev));
+	} else
+#endif
+
+	if (userboot_disk_maxunit > 0) {
+		dev.d_dev = &userboot_disk;
+		dev.d_type = dev.d_dev->dv_type;
+		dev.d_unit = 0;
+		dev.d_slice = 0;
+		dev.d_partition = 0;
+		/*
+		 * If we cannot auto-detect the partition type then
+		 * access the disk as a raw device.
+		 */
+		if (dev.d_dev->dv_open(NULL, &dev)) {
+			dev.d_slice = -1;
+			dev.d_partition = -1;
+		}
+	} else {
+		dev.d_dev = &host_dev;
+		dev.d_type = dev.d_dev->dv_type;
+		dev.d_unit = 0;
+	}
+
+	env_setenv("currdev", EV_VOLATILE, userboot_fmtdev(&dev),
+	    userboot_setcurrdev, env_nounset);
+	env_setenv("loaddev", EV_VOLATILE, userboot_fmtdev(&dev),
+	    env_noset, env_nounset);
+}
+
+#if defined(USERBOOT_ZFS_SUPPORT)
+static void
+userboot_zfs_probe(void)
+{
+	char devname[32];
+	uint64_t pool_guid;
+	int unit;
+
+	/*
+	 * Open all the disks we can find and see if we can reconstruct
+	 * ZFS pools from them. Record if any were found.
+	 */
+	for (unit = 0; unit < userboot_disk_maxunit; unit++) {
+		sprintf(devname, "disk%d:", unit);
+		pool_guid = 0;
+		zfs_probe_dev(devname, &pool_guid);
+		if (pool_guid != 0)
+			userboot_zfs_found = 1;
+	}
+}
+
+COMMAND_SET(lszfs, "lszfs", "list child datasets of a zfs dataset",
+	    command_lszfs);
+
+static int
+command_lszfs(int argc, char *argv[])
+{
+	int err;
+
+	if (argc != 2) {
+		command_errmsg = "a single dataset must be supplied";
+		return (CMD_ERROR);
+	}
+
+	err = zfs_list(argv[1]);
+	if (err != 0) {
+		command_errmsg = strerror(err);
+		return (CMD_ERROR);
+	}
+	return (CMD_OK);
+}
+
+COMMAND_SET(reloadbe, "reloadbe", "refresh the list of ZFS Boot Environments",
+	    command_reloadbe);
+
+static int
+command_reloadbe(int argc, char *argv[])
+{
+	int err;
+	char *root;
+
+	if (argc > 2) {
+		command_errmsg = "wrong number of arguments";
+		return (CMD_ERROR);
+	}
+
+	if (argc == 2) {
+		err = zfs_bootenv(argv[1]);
+	} else {
+		root = getenv("zfs_be_root");
+		if (root == NULL) {
+			return (CMD_OK);
+		}
+		err = zfs_bootenv(root);
+	}
+
+	if (err != 0) {
+		command_errmsg = strerror(err);
+		return (CMD_ERROR);
+	}
+
+	return (CMD_OK);
+}
+#endif /* USERBOOT_ZFS_SUPPORT */
+
+COMMAND_SET(quit, "quit", "exit the loader", command_quit);
+
+static int
+command_quit(int argc, char *argv[])
+{
+
+	exit(USERBOOT_EXIT_QUIT);
+	return (CMD_OK);
+}
+
+COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot);
+
+static int
+command_reboot(int argc, char *argv[])
+{
+
+	exit(USERBOOT_EXIT_REBOOT);
+	return (CMD_OK);
+}