uint16_t label_lookup_write(
label_table_t * from, label_table_t * to,
char * label, uint16_t address
)
{
uint16_t found_address;
if ((found_address = label_lookup(from, label)))
return found_address;
label_write(to, label, address);
return 0;
}
int
main(int argc, char **argv)
{
int fd_pool;
int fd_log;
vdev_label_t vl_pool;
vdev_label_t vl_log;
nvlist_t *config_pool;
nvlist_t *config_log;
uint64_t guid; // ZPOOL_CONFIG_GUID
uint64_t is_log; // ZPOOL_CONFIG_IS_LOG
nvlist_t *vdev_tree; // ZPOOL_CONFIG_VDEV_TREE
char *buf;
size_t buflen;
VERIFY(argc == 4);
VERIFY((fd_pool = open(argv[1], O_RDWR)) != -1);
VERIFY((fd_log = open(argv[2], O_RDWR)) != -1);
VERIFY(sscanf(argv[3], "%" SCNu64 , &guid) == 1);
//guid = 9851295902337437618ULL;
VERIFY(pread64(fd_pool, &vl_pool, sizeof (vdev_label_t), 0) ==
sizeof (vdev_label_t));
VERIFY(nvlist_unpack(vl_pool.vl_vdev_phys.vp_nvlist,
sizeof (vl_pool.vl_vdev_phys.vp_nvlist), &config_pool, 0) == 0);
VERIFY(pread64(fd_log, &vl_log, sizeof (vdev_label_t), 0) ==
sizeof (vdev_label_t));
VERIFY(nvlist_unpack(vl_log.vl_vdev_phys.vp_nvlist,
sizeof (vl_log.vl_vdev_phys.vp_nvlist), &config_log, 0) == 0);
// save what we want from config_log -- is_log, vdev_tree
VERIFY(nvlist_lookup_uint64(config_log, ZPOOL_CONFIG_IS_LOG, &is_log) == 0);
VERIFY(nvlist_lookup_nvlist(config_log, ZPOOL_CONFIG_VDEV_TREE, &vdev_tree) == 0);
// fix guid for vdev_log
VERIFY(nvlist_remove_all(vdev_tree, ZPOOL_CONFIG_GUID) == 0);
VERIFY(nvlist_add_uint64(vdev_tree, ZPOOL_CONFIG_GUID, guid) == 0);
// remove what we are going to replace on config_pool
VERIFY(nvlist_remove_all(config_pool, ZPOOL_CONFIG_TOP_GUID) == 0);
VERIFY(nvlist_remove_all(config_pool, ZPOOL_CONFIG_GUID) == 0);
VERIFY(nvlist_remove_all(config_pool, ZPOOL_CONFIG_VDEV_TREE) == 0);
// add back what we want
VERIFY(nvlist_add_uint64(config_pool, ZPOOL_CONFIG_TOP_GUID, guid) == 0);
VERIFY(nvlist_add_uint64(config_pool, ZPOOL_CONFIG_GUID, guid) == 0);
VERIFY(nvlist_add_uint64(config_pool, ZPOOL_CONFIG_IS_LOG, is_log) == 0);
VERIFY(nvlist_add_nvlist(config_pool, ZPOOL_CONFIG_VDEV_TREE, vdev_tree) == 0);
buf = vl_pool.vl_vdev_phys.vp_nvlist;
buflen = sizeof (vl_pool.vl_vdev_phys.vp_nvlist);
VERIFY(nvlist_pack(config_pool, &buf, &buflen, NV_ENCODE_XDR, 0) == 0);
label_write(fd_log, offsetof(vdev_label_t, vl_vdev_phys),
VDEV_PHYS_SIZE, &vl_pool.vl_vdev_phys);
fsync(fd_log);
return (0);
}
