diff options
Diffstat (limited to 'contrib/opensolaris/lib/libzfs/common/libzfs_config.c')
-rw-r--r-- | contrib/opensolaris/lib/libzfs/common/libzfs_config.c | 360 |
1 files changed, 0 insertions, 360 deletions
diff --git a/contrib/opensolaris/lib/libzfs/common/libzfs_config.c b/contrib/opensolaris/lib/libzfs/common/libzfs_config.c deleted file mode 100644 index 94640d1..0000000 --- a/contrib/opensolaris/lib/libzfs/common/libzfs_config.c +++ /dev/null @@ -1,360 +0,0 @@ -/* - * CDDL HEADER START - * - * The contents of this file are subject to the terms of the - * Common Development and Distribution License (the "License"). - * You may not use this file except in compliance with the License. - * - * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE - * or http://www.opensolaris.org/os/licensing. - * See the License for the specific language governing permissions - * and limitations under the License. - * - * When distributing Covered Code, include this CDDL HEADER in each - * file and include the License file at usr/src/OPENSOLARIS.LICENSE. - * If applicable, add the following below this CDDL HEADER, with the - * fields enclosed by brackets "[]" replaced with your own identifying - * information: Portions Copyright [yyyy] [name of copyright owner] - * - * CDDL HEADER END - */ -/* - * Copyright 2007 Sun Microsystems, Inc. All rights reserved. - * Use is subject to license terms. - */ - -#pragma ident "%Z%%M% %I% %E% SMI" - -/* - * The pool configuration repository is stored in /etc/zfs/zpool.cache as a - * single packed nvlist. While it would be nice to just read in this - * file from userland, this wouldn't work from a local zone. So we have to have - * a zpool ioctl to return the complete configuration for all pools. In the - * global zone, this will be identical to reading the file and unpacking it in - * userland. - */ - -#include <errno.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <stddef.h> -#include <string.h> -#include <unistd.h> -#include <libintl.h> -#include <libuutil.h> - -#include "libzfs_impl.h" - -typedef struct config_node { - char *cn_name; - nvlist_t *cn_config; - uu_avl_node_t cn_avl; -} config_node_t; - -/* ARGSUSED */ -static int -config_node_compare(const void *a, const void *b, void *unused) -{ - int ret; - - const config_node_t *ca = (config_node_t *)a; - const config_node_t *cb = (config_node_t *)b; - - ret = strcmp(ca->cn_name, cb->cn_name); - - if (ret < 0) - return (-1); - else if (ret > 0) - return (1); - else - return (0); -} - -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 }; - 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) { - 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); -} - -/* - * Retrieve the configuration for the given pool. The configuration is a nvlist - * describing the vdevs, as well as the statistics associated with each one. - */ -nvlist_t * -zpool_get_config(zpool_handle_t *zhp, nvlist_t **oldconfig) -{ - if (oldconfig) - *oldconfig = zhp->zpool_old_config; - return (zhp->zpool_config); -} - -/* - * 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) { - 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); -} - -/* - * Iterate over all pools in the system. - */ -int -zpool_iter(libzfs_handle_t *hdl, zpool_iter_f func, void *data) -{ - config_node_t *cn; - zpool_handle_t *zhp; - int ret; - - if (namespace_reload(hdl) != 0) - return (-1); - - for (cn = uu_avl_first(hdl->libzfs_ns_avl); cn != NULL; - cn = uu_avl_next(hdl->libzfs_ns_avl, cn)) { - - if (zpool_open_silent(hdl, cn->cn_name, &zhp) != 0) - return (-1); - - if (zhp == NULL) - continue; - - if ((ret = func(zhp, data)) != 0) - return (ret); - } - - return (0); -} - -/* - * Iterate over root datasets, calling the given function for each. The zfs - * handle passed each time must be explicitly closed by the callback. - */ -int -zfs_iter_root(libzfs_handle_t *hdl, zfs_iter_f func, void *data) -{ - config_node_t *cn; - zfs_handle_t *zhp; - int ret; - - if (namespace_reload(hdl) != 0) - return (-1); - - for (cn = uu_avl_first(hdl->libzfs_ns_avl); cn != NULL; - cn = uu_avl_next(hdl->libzfs_ns_avl, cn)) { - - if ((zhp = make_dataset_handle(hdl, cn->cn_name)) == NULL) - continue; - - if ((ret = func(zhp, data)) != 0) - return (ret); - } - - return (0); -} |