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Diffstat (limited to 'cddl/contrib/opensolaris/lib/libzfs/common/libzfs_config.c')
-rw-r--r--cddl/contrib/opensolaris/lib/libzfs/common/libzfs_config.c469
1 files changed, 0 insertions, 469 deletions
diff --git a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_config.c b/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_config.c
deleted file mode 100644
index b33d86432dc5..000000000000
--- a/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_config.c
+++ /dev/null
@@ -1,469 +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 2009 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
- */
-
-/*
- * Copyright (c) 2012 by Delphix. All rights reserved.
- * Copyright (c) 2015 by Syneto S.R.L. All rights reserved.
- * Copyright 2016 Nexenta Systems, Inc.
- */
-
-/*
- * 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);
-}
-
-/*
- * Retrieves a list of enabled features and their refcounts and caches it in
- * the pool handle.
- */
-nvlist_t *
-zpool_get_features(zpool_handle_t *zhp)
-{
- nvlist_t *config, *features;
-
- config = zpool_get_config(zhp, NULL);
-
- if (config == NULL || !nvlist_exists(config,
- ZPOOL_CONFIG_FEATURE_STATS)) {
- int error;
- boolean_t missing = B_FALSE;
-
- error = zpool_refresh_stats(zhp, &missing);
-
- if (error != 0 || missing)
- return (NULL);
-
- config = zpool_get_config(zhp, NULL);
- }
-
- if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS,
- &features) != 0)
- return (NULL);
-
- return (features);
-}
-
-/*
- * 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);
-
- 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);
-}
-
-/*
- * The following environment variables are undocumented
- * and should be used for testing purposes only:
- *
- * __ZFS_POOL_EXCLUDE - don't iterate over the pools it lists
- * __ZFS_POOL_RESTRICT - iterate only over the pools it lists
- *
- * This function returns B_TRUE if the pool should be skipped
- * during iteration.
- */
-boolean_t
-zpool_skip_pool(const char *poolname)
-{
- static boolean_t initialized = B_FALSE;
- static const char *exclude = NULL;
- static const char *restricted = NULL;
-
- const char *cur, *end;
- int len;
- int namelen = strlen(poolname);
-
- if (!initialized) {
- initialized = B_TRUE;
- exclude = getenv("__ZFS_POOL_EXCLUDE");
- restricted = getenv("__ZFS_POOL_RESTRICT");
- }
-
- if (exclude != NULL) {
- cur = exclude;
- do {
- end = strchr(cur, ' ');
- len = (NULL == end) ? strlen(cur) : (end - cur);
- if (len == namelen && 0 == strncmp(cur, poolname, len))
- return (B_TRUE);
- cur += (len + 1);
- } while (NULL != end);
- }
-
- if (NULL == restricted)
- return (B_FALSE);
-
- cur = restricted;
- do {
- end = strchr(cur, ' ');
- len = (NULL == end) ? strlen(cur) : (end - cur);
-
- if (len == namelen && 0 == strncmp(cur, poolname, len)) {
- return (B_FALSE);
- }
-
- cur += (len + 1);
- } while (NULL != end);
-
- return (B_TRUE);
-}
-
-/*
- * 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 someone makes a recursive call to zpool_iter(), we want to avoid
- * refreshing the namespace because that will invalidate the parent
- * context. We allow recursive calls, but simply re-use the same
- * namespace AVL tree.
- */
- if (!hdl->libzfs_pool_iter && namespace_reload(hdl) != 0)
- return (-1);
-
- hdl->libzfs_pool_iter++;
- for (cn = uu_avl_first(hdl->libzfs_ns_avl); cn != NULL;
- cn = uu_avl_next(hdl->libzfs_ns_avl, cn)) {
-
- if (zpool_skip_pool(cn->cn_name))
- continue;
-
- if (zpool_open_silent(hdl, cn->cn_name, &zhp) != 0) {
- hdl->libzfs_pool_iter--;
- return (-1);
- }
-
- if (zhp == NULL)
- continue;
-
- if ((ret = func(zhp, data)) != 0) {
- hdl->libzfs_pool_iter--;
- return (ret);
- }
- }
- hdl->libzfs_pool_iter--;
-
- 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 (zpool_skip_pool(cn->cn_name))
- continue;
-
- if ((zhp = make_dataset_handle(hdl, cn->cn_name)) == NULL)
- continue;
-
- if ((ret = func(zhp, data)) != 0)
- return (ret);
- }
-
- return (0);
-}