static int
zpool_get_all_props(zpool_handle_t *zhp)
{
	zfs_cmd_t zc = { 0 };
	libzfs_handle_t *hdl = zhp->zpool_hdl;

	(void) strlcpy(zc.zc_name, zhp->zpool_name, sizeof (zc.zc_name));

	if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
		return (-1);

	while (ioctl(hdl->libzfs_fd, ZFS_IOC_POOL_GET_PROPS, &zc) != 0) {
		if (errno == ENOMEM) {
			if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
				zcmd_free_nvlists(&zc);
				return (-1);
			}
		} else {
			zcmd_free_nvlists(&zc);
			return (-1);
		}
	}

	if (zcmd_read_dst_nvlist(hdl, &zc, &zhp->zpool_props) != 0) {
		zcmd_free_nvlists(&zc);
		return (-1);
	}

	zcmd_free_nvlists(&zc);

	return (0);
}
Beispiel #2
0
static int
zfs_do_list_ioctl(zfs_handle_t *zhp, int arg, zfs_cmd_t *zc)
{
	int rc;
	uint64_t	orig_cookie;

	orig_cookie = zc->zc_cookie;
top:
	(void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
	rc = ioctl(zhp->zfs_hdl->libzfs_fd, arg, zc);

	if (rc == -1) {
		switch (errno) {
		case ENOMEM:
			/* expand nvlist memory and try again */
			if (zcmd_expand_dst_nvlist(zhp->zfs_hdl, zc) != 0) {
				zcmd_free_nvlists(zc);
				return (-1);
			}
			zc->zc_cookie = orig_cookie;
			goto top;
		/*
		 * An errno value of ESRCH indicates normal completion.
		 * If ENOENT is returned, then the underlying dataset
		 * has been removed since we obtained the handle.
		 */
		case ESRCH:
		case ENOENT:
			rc = 1;
			break;
		default:
			rc = zfs_standard_error(zhp->zfs_hdl, errno,
			    dgettext(TEXT_DOMAIN,
			    "cannot iterate filesystems"));
			break;
		}
	}
	return (rc);
}
Beispiel #3
0
static nvlist_t *
refresh_config(libzfs_handle_t *hdl, nvlist_t *config)
{
	nvlist_t *nvl;
	zfs_cmd_t zc = {"\0"};
	int err;

	if (zcmd_write_conf_nvlist(hdl, &zc, config) != 0)
		return (NULL);

	if (zcmd_alloc_dst_nvlist(hdl, &zc,
	    zc.zc_nvlist_conf_size * 2) != 0) {
		zcmd_free_nvlists(&zc);
		return (NULL);
	}

	while ((err = zfs_ioctl(hdl, ZFS_IOC_POOL_TRYIMPORT,
	    &zc)) != 0 && errno == ENOMEM) {
		if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
			zcmd_free_nvlists(&zc);
			return (NULL);
		}
	}

	if (err) {
		zcmd_free_nvlists(&zc);
		return (NULL);
	}

	if (zcmd_read_dst_nvlist(hdl, &zc, &nvl) != 0) {
		zcmd_free_nvlists(&zc);
		return (NULL);
	}

	zcmd_free_nvlists(&zc);
	return (nvl);
}
Beispiel #4
0
/*
 * Refresh the vdev statistics associated with the given pool.  This is used in
 * iostat to show configuration changes and determine the delta from the last
 * time the function was called.  This function can fail, in case the pool has
 * been destroyed.
 */
int
zpool_refresh_stats(zpool_handle_t *zhp, boolean_t *missing)
{
	zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
	int error;
	nvlist_t *config;
	libzfs_handle_t *hdl = zhp->zpool_hdl;

	*missing = B_FALSE;
	(void) strcpy(zc.zc_name, zhp->zpool_name);

	if (zhp->zpool_config_size == 0)
		zhp->zpool_config_size = 1 << 16;

	if (zcmd_alloc_dst_nvlist(hdl, &zc, zhp->zpool_config_size) != 0)
		return (-1);

	for (;;) {
		//if (zfs_ioctl(zhp->zpool_hdl->libzfs_fd, ZFS_IOC_POOL_STATS,
		if (zfs_ioctl(zhp->zpool_hdl, ZFS_IOC_POOL_STATS,
		    &zc) == 0) {
			/*
			 * The real error is returned in the zc_cookie field.
			 */
            printf("ioctl(POOL_STATS) returned error\n");
			error = zc.zc_cookie;
			break;
		}

		if (errno == ENOMEM) {
			if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
				zcmd_free_nvlists(&zc);
				return (-1);
			}
		} else {
			zcmd_free_nvlists(&zc);
			if (errno == ENOENT || errno == EINVAL)
				*missing = B_TRUE;
			zhp->zpool_state = POOL_STATE_UNAVAIL;
			return (0);
		}
	}

	if (zcmd_read_dst_nvlist(hdl, &zc, &config) != 0) {
		zcmd_free_nvlists(&zc);
		return (-1);
	}

	zcmd_free_nvlists(&zc);

	zhp->zpool_config_size = zc.zc_nvlist_dst_size;

	if (zhp->zpool_config != NULL) {
		uint64_t oldtxg, newtxg;

		verify(nvlist_lookup_uint64(zhp->zpool_config,
		    ZPOOL_CONFIG_POOL_TXG, &oldtxg) == 0);
		verify(nvlist_lookup_uint64(config,
		    ZPOOL_CONFIG_POOL_TXG, &newtxg) == 0);

		if (zhp->zpool_old_config != NULL)
			nvlist_free(zhp->zpool_old_config);

		if (oldtxg != newtxg) {
			nvlist_free(zhp->zpool_config);
			zhp->zpool_old_config = NULL;
		} else {
			zhp->zpool_old_config = zhp->zpool_config;
		}
	}

	zhp->zpool_config = config;
	if (error)
		zhp->zpool_state = POOL_STATE_UNAVAIL;
	else
		zhp->zpool_state = POOL_STATE_ACTIVE;

	return (0);
}
Beispiel #5
0
/*
 * 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);
}
Beispiel #6
0
/*
 * Refresh the vdev statistics associated with the given pool.  This is used in
 * iostat to show configuration changes and determine the delta from the last
 * time the function was called.  This function can fail, in case the pool has
 * been destroyed.
 */
int
zpool_refresh_stats(zpool_handle_t *zhp, boolean_t *missing)
{
	zfs_cmd_t zc = {"\0"};
	int error;
	nvlist_t *config;
	libzfs_handle_t *hdl = zhp->zpool_hdl;

	*missing = B_FALSE;
	(void) strcpy(zc.zc_name, zhp->zpool_name);

	if (zhp->zpool_config_size == 0)
		zhp->zpool_config_size = 1 << 16;

	if (zcmd_alloc_dst_nvlist(hdl, &zc, zhp->zpool_config_size) != 0)
		return (-1);

	for (;;) {
		if (ioctl(zhp->zpool_hdl->libzfs_fd, ZFS_IOC_POOL_STATS,
		    &zc) == 0) {
			/*
			 * The real error is returned in the zc_cookie field.
			 */
			error = zc.zc_cookie;
			break;
		}

		if (errno == ENOMEM) {
			if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
				zcmd_free_nvlists(&zc);
				return (-1);
			}
		} else {
			zcmd_free_nvlists(&zc);
			if (errno == ENOENT || errno == EINVAL)
				*missing = B_TRUE;
			zhp->zpool_state = POOL_STATE_UNAVAIL;
			return (0);
		}
	}

	if (zcmd_read_dst_nvlist(hdl, &zc, &config) != 0) {
		zcmd_free_nvlists(&zc);
		return (-1);
	}

	zcmd_free_nvlists(&zc);

	zhp->zpool_config_size = zc.zc_nvlist_dst_size;

	if (zhp->zpool_config != NULL) {
		nvlist_free(zhp->zpool_old_config);

		zhp->zpool_old_config = zhp->zpool_config;
	}

	zhp->zpool_config = config;
	if (error)
		zhp->zpool_state = POOL_STATE_UNAVAIL;
	else
		zhp->zpool_state = POOL_STATE_ACTIVE;

	return (0);
}