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test-netlink: use dummy interface to test assigning new interface name

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Fixes #25981.
This commit is contained in:
Yu Watanabe 2023-01-09 21:00:53 +09:00
parent eafff21da2
commit 5ccbe7fb19
1 changed files with 56 additions and 5 deletions
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61
src/libsystemd/sd-netlink/test-netlink.c
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@ -601,30 +601,81 @@ TEST(genl) {
}
}
static void remove_dummy_interfacep(int *ifindex) {
_cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL;
if (!ifindex || *ifindex <= 0)
return;
assert_se(sd_netlink_open(&rtnl) >= 0);
assert_se(sd_rtnl_message_new_link(rtnl, &message, RTM_DELLINK, *ifindex) >= 0);
assert_se(sd_netlink_call(rtnl, message, 0, NULL) == 1);
}
TEST(rtnl_set_link_name) {
_cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL, *reply = NULL;
_cleanup_(remove_dummy_interfacep) int ifindex = 0;
_cleanup_strv_free_ char **alternative_names = NULL;
int ifindex, r;
int r;
if (geteuid() != 0)
return (void) log_tests_skipped("not root");
assert_se(sd_netlink_open(&rtnl) >= 0);
ifindex = (int) if_nametoindex("lo");
assert_se(sd_rtnl_message_new_link(rtnl, &message, RTM_NEWLINK, 0) >= 0);
assert_se(sd_netlink_message_append_string(message, IFLA_IFNAME, "test-netlink") >= 0);
assert_se(sd_netlink_message_open_container(message, IFLA_LINKINFO) >= 0);
assert_se(sd_netlink_message_append_string(message, IFLA_INFO_KIND, "dummy") >= 0);
r = sd_netlink_call(rtnl, message, 0, &reply);
if (r == -EPERM)
return (void) log_tests_skipped("missing required capabilities");
if (r == -EOPNOTSUPP)
return (void) log_tests_skipped("dummy network interface is not supported");
assert_se(r >= 0);
message = sd_netlink_message_unref(message);
reply = sd_netlink_message_unref(reply);
assert_se(sd_rtnl_message_new_link(rtnl, &message, RTM_GETLINK, 0) >= 0);
assert_se(sd_netlink_message_append_string(message, IFLA_IFNAME, "test-netlink") >= 0);
assert_se(sd_netlink_call(rtnl, message, 0, &reply) == 1);
assert_se(sd_rtnl_message_link_get_ifindex(reply, &ifindex) >= 0);
assert_se(ifindex > 0);
/* Test that the new name (which is currently an alternative name) is
* restored as an alternative name on error. Create an error by using
* an invalid device name, namely one that exceeds IFNAMSIZ
* (alternative names can exceed IFNAMSIZ, but not regular names). */
r = rtnl_set_link_alternative_names(&rtnl, ifindex, STRV_MAKE("testlongalternativename"));
r = rtnl_set_link_alternative_names(&rtnl, ifindex, STRV_MAKE("testlongalternativename", "test-shortname"));
if (r == -EPERM)
return (void) log_tests_skipped("missing required capabilities");
if (r == -EOPNOTSUPP)
return (void) log_tests_skipped("alternative name is not supported");
assert_se(r >= 0);
assert_se(rtnl_set_link_name(&rtnl, ifindex, "testlongalternativename") == -EINVAL);
assert_se(rtnl_get_link_alternative_names(&rtnl, ifindex, &alternative_names) >= 0);
assert_se(strv_contains(alternative_names, "testlongalternativename"));
assert_se(strv_contains(alternative_names, "test-shortname"));
assert_se(rtnl_set_link_name(&rtnl, ifindex, "testlongalternativename") == -EINVAL);
assert_se(rtnl_set_link_name(&rtnl, ifindex, "test-shortname") >= 0);
alternative_names = strv_free(alternative_names);
assert_se(rtnl_get_link_alternative_names(&rtnl, ifindex, &alternative_names) >= 0);
assert_se(strv_contains(alternative_names, "testlongalternativename"));
assert_se(!strv_contains(alternative_names, "test-shortname"));
assert_se(rtnl_delete_link_alternative_names(&rtnl, ifindex, STRV_MAKE("testlongalternativename")) >= 0);
alternative_names = strv_free(alternative_names);
assert_se(rtnl_get_link_alternative_names(&rtnl, ifindex, &alternative_names) >= 0);
assert_se(!strv_contains(alternative_names, "testlongalternativename"));
assert_se(!strv_contains(alternative_names, "test-shortname"));
}
DEFINE_TEST_MAIN(LOG_DEBUG);