freebsd-skq/sys/boot/zfs/zfstest.c

121 lines
2.9 KiB
C

/*-
* 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);
}