Exemple #1
0
/*
 * Called when the module is first loaded, this routine loads the configuration
 * file into the SPA namespace.  It does not actually open or load the pools; it
 * only populates the namespace.
 */
void
spa_config_load(void)
{
	void *buf = NULL;
	nvlist_t *nvlist, *child;
	nvpair_t *nvpair;
	spa_t *spa;
	char pathname[128];
	struct _buf *file;
	struct bootstat bst;

	/*
	 * Open the configuration file.
	 */
	(void) snprintf(pathname, sizeof (pathname), "%s%s/%s",
	    (rootdir != NULL) ? "./" : "", spa_config_dir, ZPOOL_CACHE_FILE);

	file = kobj_open_file(pathname);
	if (file == (struct _buf *)-1)
		return;

	if (kobj_fstat(file->_fd, &bst) != 0)
		goto out;

	buf = kmem_alloc(bst.st_size, KM_SLEEP);

	/*
	 * Read the nvlist from the file.
	 */
	if (kobj_read_file(file, buf, bst.st_size, 0) < 0)
		goto out;

	/*
	 * Unpack the nvlist.
	 */
	if (nvlist_unpack(buf, bst.st_size, &nvlist, KM_SLEEP) != 0)
		goto out;

	/*
	 * Iterate over all elements in the nvlist, creating a new spa_t for
	 * each one with the specified configuration.
	 */
	mutex_enter(&spa_namespace_lock);
	nvpair = NULL;
	while ((nvpair = nvlist_next_nvpair(nvlist, nvpair)) != NULL) {

		if (nvpair_type(nvpair) != DATA_TYPE_NVLIST)
			continue;

		VERIFY(nvpair_value_nvlist(nvpair, &child) == 0);

		if (spa_lookup(nvpair_name(nvpair)) != NULL)
			continue;
		spa = spa_add(nvpair_name(nvpair), NULL);

		/*
		 * We blindly duplicate the configuration here.  If it's
		 * invalid, we will catch it when the pool is first opened.
		 */
		VERIFY(nvlist_dup(child, &spa->spa_config, 0) == 0);
	}
	mutex_exit(&spa_namespace_lock);

	nvlist_free(nvlist);

out:
	if (buf != NULL)
		kmem_free(buf, bst.st_size);

	kobj_close_file(file);
}
Exemple #2
0
/*
 * Called when the module is first loaded, this routine loads the configuration
 * file into the SPA namespace.  It does not actually open or load the pools; it
 * only populates the namespace.
 */
void
spa_config_load(void)
{
	void *buf = NULL;
	nvlist_t *nvlist, *child;
	nvpair_t *nvpair;
	char *pathname;
	struct _buf *file;
	uint64_t fsize;

	/*
	 * Open the configuration file.
	 */
	pathname = kmem_alloc(MAXPATHLEN, KM_SLEEP);

	(void) snprintf(pathname, MAXPATHLEN, "%s", spa_config_path);

	file = kobj_open_file(pathname);

	kmem_free(pathname, MAXPATHLEN);

	if (file == (struct _buf *)-1)
		return;

	if (kobj_get_filesize(file, &fsize) != 0)
		goto out;

	buf = kmem_alloc(fsize, KM_SLEEP);

	/*
	 * Read the nvlist from the file.
	 */
	if (kobj_read_file(file, buf, fsize, 0) < 0)
		goto out;

	/*
	 * Unpack the nvlist.
	 */
	if (nvlist_unpack(buf, fsize, &nvlist, KM_SLEEP) != 0)
		goto out;

	/*
	 * Iterate over all elements in the nvlist, creating a new spa_t for
	 * each one with the specified configuration.
	 */
	mutex_enter(&spa_namespace_lock);
	nvpair = NULL;
	while ((nvpair = nvlist_next_nvpair(nvlist, nvpair)) != NULL) {
		if (nvpair_type(nvpair) != DATA_TYPE_NVLIST)
			continue;

		VERIFY(nvpair_value_nvlist(nvpair, &child) == 0);

		if (spa_lookup(nvpair_name(nvpair)) != NULL)
			continue;
		(void) spa_add(nvpair_name(nvpair), child, NULL);
	}
	mutex_exit(&spa_namespace_lock);

	nvlist_free(nvlist);

out:
	if (buf != NULL)
		kmem_free(buf, fsize);

	kobj_close_file(file);
}