Author: dfr
Date: Fri Jul 30 13:54:15 2010
New Revision: 210650
URL: http://svn.freebsd.org/changeset/base/210650
Log:
A simple test harness to help debug problems with the ZFS boot code.
Added:
head/sys/boot/zfs/zfstest.c (contents, props changed)
Added: head/sys/boot/zfs/zfstest.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/boot/zfs/zfstest.c Fri Jul 30 13:54:15 2010 (r210650)
@@ -0,0 +1,120 @@
+/*-
+ * Copyright (c) 2010 Doug Rabson
+ * 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.
+ */
+/* $FreeBSD$ */
+/*
+ * Compile with 'cc -I. -I../../cddl/boot/zfs zfstest.c -o zfstest'
+ */
+
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#define NBBY 8
+
+void
+pager_output(const char *line)
+{
+ printf("%s", line);
+}
+
+#include "zfsimpl.c"
+
+static int
+vdev_read(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes)
+{
+ int fd = *(int *) priv;
+
+ if (pread(fd, buf, bytes, off) != bytes)
+ return -1;
+ return 0;
+}
+
+static int
+zfs_read(spa_t *spa, dnode_phys_t *dn, void *buf, size_t size, off_t off)
+{
+ const znode_phys_t *zp = (const znode_phys_t *) dn->dn_bonus;
+ size_t n;
+ int rc;
+
+ n = size;
+ if (off + n > zp->zp_size)
+ n = zp->zp_size - off;
+
+ rc = dnode_read(spa, dn, off, buf, n);
+ if (rc)
+ return (rc);
+
+ return (n);
+}
+
+int
+main(int argc, char** argv)
+{
+ int i, n, off;
+ int fd[99];
+ spa_t *spa;
+ dnode_phys_t dn;
+ char buf[512];
+
+ zfs_init();
+ if (argc == 1) {
+ static char *av[] = {
+ "zfstest", "/dev/da0p2", "/dev/da1p2", "/dev/da2p2",
+ NULL,
+ };
+ argc = 4;
+ argv = av;
+ }
+ for (i = 1; i < argc; i++) {
+ fd[i] = open(argv[i], O_RDONLY);
+ if (fd[i] < 0)
+ continue;
+ if (vdev_probe(vdev_read, &fd[i], NULL) != 0)
+ close(fd[i]);
+ }
+ spa_all_status();
+
+ spa = STAILQ_FIRST(&zfs_pools);
+ if (!spa || zfs_mount_pool(spa))
+ exit(1);
+
+ if (zfs_lookup(spa, "zfs.c", &dn))
+ exit(1);
+
+ off = 0;
+ do {
+ n = zfs_read(spa, &dn, buf, 512, off);
+ write(1, buf, n);
+ off += n;
+ } while (n == 512);
+}
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