Prevent zpool upgrade failing due to unavailable pools

Prior to this fix "zpool upgrade" and "zpool upgrade -a" would fail due to
an assert when operating on unavailable pools.

We now print a warning to stderr but allow the processing of other pools
to procesed.

MFC after:	1 month

1 files changed, 15 insertions, 0 deletions

diff --git a/cddl/contrib/opensolaris/cmd/zpool/zpool_main.c b/cddl/contrib/opensolaris/cmd/zpool/zpool_main.c
index 31340b0..8251989 100644
--- a/cddl/contrib/opensolaris/cmd/zpool/zpool_main.c
+++ b/cddl/contrib/opensolaris/cmd/zpool/zpool_main.c
@@ -4629,6 +4629,13 @@ upgrade_cb(zpool_handle_t *zhp, void *arg)
 	boolean_t printnl = B_FALSE;
 	int ret;
 
+	if (zpool_get_state(zhp) == POOL_STATE_UNAVAIL) {
+		(void) fprintf(stderr, gettext("cannot upgrade '%s': pool is "
+		    "currently unavailable\n\n"), zpool_get_name(zhp));
+		/* Allow iteration to continue. */
+		return (0);
+	}
+
 	config = zpool_get_config(zhp, NULL);
 	verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
 	    &version) == 0);
@@ -4729,6 +4736,14 @@ upgrade_list_disabled_cb(zpool_handle_t *zhp, void *arg)
 	nvlist_t *config;
 	uint64_t version;
 
+	if (zpool_get_state(zhp) == POOL_STATE_UNAVAIL) {
+		(void) fprintf(stderr, gettext("cannot check supported "
+		    "features on '%s': pool is currently unavailable\n\n"),
+		    zpool_get_name(zhp));
+		/* Allow iteration to continue. */
+		return (0);
+	}
+
 	config = zpool_get_config(zhp, NULL);
 	verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
 	    &version) == 0);