Add const to nvlist functions to properly expose their real behavior

Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Paul Dagnelie <pcd@delphix.com>
Closes #12728

cmd/zed/agents/fmd_api.c

@@ -428,7 +428,8 @@ fmd_case_add_suspect(fmd_hdl_t *hdl, fmd_case_t *cp, nvlist_t *fault)
 	err |= nvlist_add_string(nvl, FM_SUSPECT_DIAG_CODE, code);
 	err |= nvlist_add_int64_array(nvl, FM_SUSPECT_DIAG_TIME, tod, 2);
 	err |= nvlist_add_uint32(nvl, FM_SUSPECT_FAULT_SZ, 1);
-	err |= nvlist_add_nvlist_array(nvl, FM_SUSPECT_FAULT_LIST, &fault, 1);
+	err |= nvlist_add_nvlist_array(nvl, FM_SUSPECT_FAULT_LIST,
+	    (const nvlist_t **)&fault, 1);
 
 	if (err)
 		zed_log_die("failed to populate nvlist");

cmd/zed/agents/zfs_mod.c

@@ -414,8 +414,8 @@ zfs_process_add(zpool_handle_t *zhp, nvlist_t *vdev, boolean_t labeled)
 	    ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH, enc_sysfs_path) != 0) ||
 	    nvlist_add_uint64(newvd, ZPOOL_CONFIG_WHOLE_DISK, wholedisk) != 0 ||
 	    nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, VDEV_TYPE_ROOT) != 0 ||
-	    nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, &newvd,
-	    1) != 0) {
+	    nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
+	    (const nvlist_t **)&newvd, 1) != 0) {
 		zed_log_msg(LOG_WARNING, "zfs_mod: unable to add nvlist pairs");
 		nvlist_free(newvd);
 		nvlist_free(nvroot);

cmd/zed/agents/zfs_retire.c

@@ -239,7 +239,7 @@ replace_with_spare(fmd_hdl_t *hdl, zpool_handle_t *zhp, nvlist_t *vdev)
 			    ZPOOL_CONFIG_ASHIFT, ashift);
 
 		(void) nvlist_add_nvlist_array(replacement,
-		    ZPOOL_CONFIG_CHILDREN, &spares[s], 1);
+		    ZPOOL_CONFIG_CHILDREN, (const nvlist_t **)&spares[s], 1);
 
 		fmd_hdl_debug(hdl, "zpool_vdev_replace '%s' with spare '%s'",
 		    dev_name, zfs_basename(spare_name));

cmd/zfs/zfs_main.c

@@ -8010,7 +8010,8 @@ zfs_do_channel_program(int argc, char **argv)
 	 * }
 	 */
 	nvlist_t *argnvl = fnvlist_alloc();
-	fnvlist_add_string_array(argnvl, ZCP_ARG_CLIARGV, argv + 2, argc - 2);
+	fnvlist_add_string_array(argnvl, ZCP_ARG_CLIARGV,
+	    (const char **)argv + 2, argc - 2);
 
 	if (sync_flag) {
 		ret = lzc_channel_program(poolname, progbuf,

cmd/zpool/zpool_vdev.c

@@ -1647,8 +1647,8 @@ construct_spec(nvlist_t *props, int argc, char **argv)
 					}
 				}
 				verify(nvlist_add_nvlist_array(nv,
-				    ZPOOL_CONFIG_CHILDREN, child,
-				    children) == 0);
+				    ZPOOL_CONFIG_CHILDREN,
+				    (const nvlist_t **)child, children) == 0);
 
 				for (c = 0; c < children; c++)
 					nvlist_free(child[c]);
@@ -1713,13 +1713,13 @@ construct_spec(nvlist_t *props, int argc, char **argv)
 	verify(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE,
 	    VDEV_TYPE_ROOT) == 0);
 	verify(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
-	    top, toplevels) == 0);
+	    (const nvlist_t **)top, toplevels) == 0);
 	if (nspares != 0)
 		verify(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
-		    spares, nspares) == 0);
+		    (const nvlist_t **)spares, nspares) == 0);
 	if (nl2cache != 0)
 		verify(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
-		    l2cache, nl2cache) == 0);
+		    (const nvlist_t **)l2cache, nl2cache) == 0);
 
 spec_out:
 	for (t = 0; t < toplevels; t++)

cmd/ztest/ztest.c

@@ -1287,7 +1287,8 @@ make_vdev_raid(char *path, char *aux, char *pool, size_t size,
 	    ztest_opts.zo_raid_type);
 	fnvlist_add_uint64(raid, ZPOOL_CONFIG_NPARITY,
 	    ztest_opts.zo_raid_parity);
-	fnvlist_add_nvlist_array(raid, ZPOOL_CONFIG_CHILDREN, child, r);
+	fnvlist_add_nvlist_array(raid, ZPOOL_CONFIG_CHILDREN,
+	    (const nvlist_t **)child, r);
 
 	if (strcmp(ztest_opts.zo_raid_type, VDEV_TYPE_DRAID) == 0) {
 		uint64_t ndata = ztest_opts.zo_draid_data;
@@ -1335,7 +1336,8 @@ make_vdev_mirror(char *path, char *aux, char *pool, size_t size,
 
 	mirror = fnvlist_alloc();
 	fnvlist_add_string(mirror, ZPOOL_CONFIG_TYPE, VDEV_TYPE_MIRROR);
-	fnvlist_add_nvlist_array(mirror, ZPOOL_CONFIG_CHILDREN, child, m);
+	fnvlist_add_nvlist_array(mirror, ZPOOL_CONFIG_CHILDREN,
+	    (const nvlist_t **)child, m);
 
 	for (c = 0; c < m; c++)
 		fnvlist_free(child[c]);
@@ -1374,7 +1376,7 @@ make_vdev_root(char *path, char *aux, char *pool, size_t size, uint64_t ashift,
 	root = fnvlist_alloc();
 	fnvlist_add_string(root, ZPOOL_CONFIG_TYPE, VDEV_TYPE_ROOT);
 	fnvlist_add_nvlist_array(root, aux ? aux : ZPOOL_CONFIG_CHILDREN,
-	    child, t);
+	    (const nvlist_t **)child, t);
 
 	for (c = 0; c < t; c++)
 		fnvlist_free(child[c]);
@@ -3550,8 +3552,8 @@ ztest_split_pool(ztest_ds_t *zd, uint64_t id)
 	/* OK, create a config that can be used to split */
 	split = fnvlist_alloc();
 	fnvlist_add_string(split, ZPOOL_CONFIG_TYPE, VDEV_TYPE_ROOT);
-	fnvlist_add_nvlist_array(split, ZPOOL_CONFIG_CHILDREN, schild,
-	    lastlogid != 0 ? lastlogid : schildren);
+	fnvlist_add_nvlist_array(split, ZPOOL_CONFIG_CHILDREN,
+	    (const nvlist_t **)schild, lastlogid != 0 ? lastlogid : schildren);
 
 	config = fnvlist_alloc();
 	fnvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, split);