On Thu, Jun 14, 2012 at 09:56:43AM +1000, Daniel Carosone wrote:
> On Tue, Jun 12, 2012 at 03:46:00PM +1000, Scott Aitken wrote:
> > Hi all,
>
> Hi Scott. :-)
>
> > I have a 5 drive RAIDZ volume with data that I'd like to recover.
>
> Yeah, still..
>
> > I tried using Jeff Bonwick's labelfix binary to create new labels but it
> > carps because the txg is not zero.
>
> Can you provide details of invocation and error response?
# /root/labelfix /dev/lofi/1
assertion failed for thread 0xfecb2a40, thread-id 1: txg == 0, file label.c,
line 53
Abort (core dumped)
The reporting line of code is:
VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0);
Here is the entire labelfix code:
#include <devid.h>
#include <dirent.h>
#include <errno.h>
#include <libintl.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <stddef.h>
#include <sys/vdev_impl.h>
/*
* Write a label block with a ZBT checksum.
*/
static void
label_write(int fd, uint64_t offset, uint64_t size, void *buf)
{
zio_block_tail_t *zbt, zbt_orig;
zio_cksum_t zc;
zbt = (zio_block_tail_t *)((char *)buf + size) - 1;
zbt_orig = *zbt;
ZIO_SET_CHECKSUM(&zbt->zbt_cksum, offset, 0, 0, 0);
zio_checksum(ZIO_CHECKSUM_LABEL, &zc, buf, size);
VERIFY(pwrite64(fd, buf, size, offset) == size);
*zbt = zbt_orig;
}
int
main(int argc, char **argv)
{
int fd;
vdev_label_t vl;
nvlist_t *config;
uberblock_t *ub = (uberblock_t *)vl.vl_uberblock;
uint64_t txg;
char *buf;
size_t buflen;
VERIFY(argc == 2);
VERIFY((fd = open(argv[1], O_RDWR)) != -1);
VERIFY(pread64(fd, &vl, sizeof (vdev_label_t), 0) ==
sizeof (vdev_label_t));
VERIFY(nvlist_unpack(vl.vl_vdev_phys.vp_nvlist,
sizeof (vl.vl_vdev_phys.vp_nvlist), &config, 0) == 0);
VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) ==
0);
VERIFY(txg == 0);
VERIFY(ub->ub_txg == 0);
VERIFY(ub->ub_rootbp.blk_birth != 0);
txg = ub->ub_rootbp.blk_birth;
ub->ub_txg = txg;
VERIFY(nvlist_remove_all(config, ZPOOL_CONFIG_POOL_TXG) == 0);
VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, txg) == 0);
buf = vl.vl_vdev_phys.vp_nvlist;
buflen = sizeof (vl.vl_vdev_phys.vp_nvlist);
VERIFY(nvlist_pack(config, &buf, &buflen, NV_ENCODE_XDR, 0) == 0);
label_write(fd, offsetof(vdev_label_t, vl_uberblock),
1ULL << UBERBLOCK_SHIFT, ub);
label_write(fd, offsetof(vdev_label_t, vl_vdev_phys),
VDEV_PHYS_SIZE, &vl.vl_vdev_phys);
fsync(fd);
return (0);
}
>
> For the benefit of others, this was at my suggestion; I've been
> discussing this problem with Scott for.. some time.
>
> > I can also make the solaris machine available via SSH if some wonderful
> > person wants to poke around.
>
> Will take a poke, as discussed. May well raise more discussion here
> as a result.
>
> --
> Dan.
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