diff options
Diffstat (limited to 'lib/libzfs/libzfs_config.c')
| -rw-r--r-- | lib/libzfs/libzfs_config.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/lib/libzfs/libzfs_config.c b/lib/libzfs/libzfs_config.c index b36dee1e5..ee94fe106 100644 --- a/lib/libzfs/libzfs_config.c +++ b/lib/libzfs/libzfs_config.c @@ -18,12 +18,17 @@ * * 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. + */ + +/* * 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 @@ -218,6 +223,36 @@ zpool_get_config(zpool_handle_t *zhp, nvlist_t **oldconfig) } /* + * 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); + } + + verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS, + &features) == 0); + + 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 |