void
namespace_clear(libzfs_handle_t *hdl)
{
if (hdl->libzfs_ns_avl) {
config_node_t *cn;
void *cookie = NULL;
while ((cn = uu_avl_teardown(hdl->libzfs_ns_avl,
&cookie)) != NULL) {
nvlist_free(cn->cn_config);
free(cn->cn_name);
free(cn);
}
uu_avl_destroy(hdl->libzfs_ns_avl);
hdl->libzfs_ns_avl = NULL;
}
if (hdl->libzfs_ns_avlpool) {
uu_avl_pool_destroy(hdl->libzfs_ns_avlpool);
hdl->libzfs_ns_avlpool = NULL;
}
}
/*
* Loads the pool namespace, or re-loads it if the cache has changed.
*/
static int
namespace_reload(libzfs_handle_t *hdl)
{
nvlist_t *config;
config_node_t *cn;
nvpair_t *elem;
zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
void *cookie;
if (hdl->libzfs_ns_gen == 0) {
/*
* This is the first time we've accessed the configuration
* cache. Initialize the AVL tree and then fall through to the
* common code.
*/
if ((hdl->libzfs_ns_avlpool = uu_avl_pool_create("config_pool",
sizeof (config_node_t),
offsetof(config_node_t, cn_avl),
config_node_compare, UU_DEFAULT)) == NULL)
return (no_memory(hdl));
if ((hdl->libzfs_ns_avl = uu_avl_create(hdl->libzfs_ns_avlpool,
NULL, UU_DEFAULT)) == NULL)
return (no_memory(hdl));
}
if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
return (-1);
for (;;) {
zc.zc_cookie = hdl->libzfs_ns_gen;
//if (ioctl(hdl->libzfs_fd, ZFS_IOC_POOL_CONFIGS, &zc) != 0) {
if (zfs_ioctl(hdl, ZFS_IOC_POOL_CONFIGS, &zc) != 0) {
switch (errno) {
case EEXIST:
/*
* The namespace hasn't changed.
*/
zcmd_free_nvlists(&zc);
return (0);
case ENOMEM:
if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
zcmd_free_nvlists(&zc);
return (-1);
}
break;
default:
zcmd_free_nvlists(&zc);
return (zfs_standard_error(hdl, errno,
dgettext(TEXT_DOMAIN, "failed to read "
"pool configuration")));
}
} else {
hdl->libzfs_ns_gen = zc.zc_cookie;
break;
}
}
if (zcmd_read_dst_nvlist(hdl, &zc, &config) != 0) {
zcmd_free_nvlists(&zc);
return (-1);
}
zcmd_free_nvlists(&zc);
/*
* Clear out any existing configuration information.
*/
cookie = NULL;
while ((cn = uu_avl_teardown(hdl->libzfs_ns_avl, &cookie)) != NULL) {
nvlist_free(cn->cn_config);
free(cn->cn_name);
free(cn);
}
elem = NULL;
while ((elem = nvlist_next_nvpair(config, elem)) != NULL) {
nvlist_t *child;
uu_avl_index_t where;
if ((cn = zfs_alloc(hdl, sizeof (config_node_t))) == NULL) {
nvlist_free(config);
return (-1);
}
if ((cn->cn_name = zfs_strdup(hdl,
nvpair_name(elem))) == NULL) {
free(cn);
nvlist_free(config);
return (-1);
}
verify(nvpair_value_nvlist(elem, &child) == 0);
if (nvlist_dup(child, &cn->cn_config, 0) != 0) {
free(cn->cn_name);
free(cn);
nvlist_free(config);
return (no_memory(hdl));
}
verify(uu_avl_find(hdl->libzfs_ns_avl, cn, NULL, &where)
== NULL);
uu_avl_insert(hdl->libzfs_ns_avl, cn, where);
}
nvlist_free(config);
return (0);
}
static int namespace_reload(libzfs_handle_t *p_hdl)
{
nvlist_t *pnv_config;
nvpair_t *pnv_elem;
config_node_t *p_cn;
void *cookie;
if(p_hdl->libzfs_ns_gen == 0)
{
/*
* This is the first time we've accessed the configuration
* cache. Initialize the AVL tree and then fall through to the
* common code.
*/
if(!(p_hdl->libzfs_ns_avlpool =
uu_avl_pool_create("config_pool", sizeof (config_node_t),
offsetof(config_node_t, cn_avl),
config_node_compare, UU_DEFAULT)))
return -1;
if((p_hdl->libzfs_ns_avl =
uu_avl_create(p_hdl->libzfs_ns_avlpool, NULL, UU_DEFAULT)) == NULL)
return 1;
}
pnv_config = spa_all_configs(&p_hdl->libzfs_ns_gen);
if(!pnv_config)
return -1;
/*
* Clear out any existing configuration information.
*/
cookie = NULL;
while((p_cn = uu_avl_teardown(p_hdl->libzfs_ns_avl, &cookie)) != NULL)
{
nvlist_free(p_cn->cn_config);
free(p_cn->cn_name);
free(p_cn);
}
pnv_elem = NULL;
while((pnv_elem = nvlist_next_nvpair(pnv_config, pnv_elem)) != NULL)
{
nvlist_t *child;
uu_avl_index_t where;
if((p_cn = zfs_alloc(p_hdl, sizeof (config_node_t))) == NULL)
{
nvlist_free(pnv_config);
return -1;
}
if((p_cn->cn_name = zfs_strdup(p_hdl,
nvpair_name(pnv_elem))) == NULL) {
free(p_cn);
nvlist_free(pnv_config);
return -1;
}
verify(nvpair_value_nvlist(pnv_elem, &child) == 0);
if (nvlist_dup(child, &p_cn->cn_config, 0) != 0) {
free(p_cn->cn_name);
free(p_cn);
nvlist_free(pnv_config);
return -1;
}
verify(uu_avl_find(p_hdl->libzfs_ns_avl, p_cn, NULL, &where)
== NULL);
uu_avl_insert(p_hdl->libzfs_ns_avl, p_cn, where);
}
nvlist_free(pnv_config);
return 0;
}
