From 32e39fd249737c77248c32d064021426a2ec7a52 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Sun, 15 Dec 2019 20:57:51 +0900
Subject: [PATCH] sd-netlink: support IFLA_PROP_LIST and IFLA_ALT_IFNAME
 attributes

(cherry picked from commit ffeb16f5d832b1c65b8c8a1dd9bdd028bd76fc72)

Related: #2005008
---
 src/libsystemd/sd-netlink/netlink-message.c |  2 +-
 src/libsystemd/sd-netlink/netlink-types.c   | 13 +++++++++++++
 src/libsystemd/sd-netlink/netlink-util.h    |  4 +++-
 src/libsystemd/sd-netlink/rtnl-message.c    |  2 ++
 4 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/libsystemd/sd-netlink/netlink-message.c b/src/libsystemd/sd-netlink/netlink-message.c
index 23907c8224..db9101c163 100644
--- a/src/libsystemd/sd-netlink/netlink-message.c
+++ b/src/libsystemd/sd-netlink/netlink-message.c
@@ -89,7 +89,7 @@ int sd_netlink_message_request_dump(sd_netlink_message *m, int dump) {
         assert_return(m, -EINVAL);
         assert_return(m->hdr, -EINVAL);
 
-        assert_return(IN_SET(m->hdr->nlmsg_type, RTM_GETLINK, RTM_GETADDR, RTM_GETROUTE, RTM_GETNEIGH, RTM_GETRULE, RTM_GETADDRLABEL), -EINVAL);
+        assert_return(IN_SET(m->hdr->nlmsg_type, RTM_GETLINK, RTM_GETLINKPROP, RTM_GETADDR, RTM_GETROUTE, RTM_GETNEIGH, RTM_GETRULE, RTM_GETADDRLABEL), -EINVAL);
 
         SET_FLAG(m->hdr->nlmsg_flags, NLM_F_DUMP, dump);
 
diff --git a/src/libsystemd/sd-netlink/netlink-types.c b/src/libsystemd/sd-netlink/netlink-types.c
index c93fe9cb4c..47d9c7f1c4 100644
--- a/src/libsystemd/sd-netlink/netlink-types.c
+++ b/src/libsystemd/sd-netlink/netlink-types.c
@@ -451,6 +451,15 @@ static const NLTypeSystem rtnl_af_spec_type_system = {
         .types = rtnl_af_spec_types,
 };
 
+static const NLType rtnl_prop_list_types[] = {
+        [IFLA_ALT_IFNAME]       = { .type = NETLINK_TYPE_STRING, .size = ALTIFNAMSIZ - 1 },
+};
+
+static const NLTypeSystem rtnl_prop_list_type_system = {
+        .count = ELEMENTSOF(rtnl_prop_list_types),
+        .types = rtnl_prop_list_types,
+};
+
 static const NLType rtnl_link_types[] = {
         [IFLA_ADDRESS]          = { .type = NETLINK_TYPE_ETHER_ADDR },
         [IFLA_BROADCAST]        = { .type = NETLINK_TYPE_ETHER_ADDR },
@@ -501,6 +510,7 @@ static const NLType rtnl_link_types[] = {
 /*
         [IFLA_PHYS_PORT_ID]     = { .type = NETLINK_TYPE_BINARY, .len = MAX_PHYS_PORT_ID_LEN },
 */
+        [IFLA_PROP_LIST]        = { .type = NETLINK_TYPE_NESTED, .type_system = &rtnl_prop_list_type_system },
 };
 
 static const NLTypeSystem rtnl_link_type_system = {
@@ -643,6 +653,9 @@ static const NLType rtnl_types[] = {
         [RTM_DELLINK]      = { .type = NETLINK_TYPE_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
         [RTM_GETLINK]      = { .type = NETLINK_TYPE_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
         [RTM_SETLINK]      = { .type = NETLINK_TYPE_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
+        [RTM_NEWLINKPROP]  = { .type = NETLINK_TYPE_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
+        [RTM_DELLINKPROP]  = { .type = NETLINK_TYPE_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
+        [RTM_GETLINKPROP]  = { .type = NETLINK_TYPE_NESTED, .type_system = &rtnl_link_type_system, .size = sizeof(struct ifinfomsg) },
         [RTM_NEWADDR]      = { .type = NETLINK_TYPE_NESTED, .type_system = &rtnl_address_type_system, .size = sizeof(struct ifaddrmsg) },
         [RTM_DELADDR]      = { .type = NETLINK_TYPE_NESTED, .type_system = &rtnl_address_type_system, .size = sizeof(struct ifaddrmsg) },
         [RTM_GETADDR]      = { .type = NETLINK_TYPE_NESTED, .type_system = &rtnl_address_type_system, .size = sizeof(struct ifaddrmsg) },
diff --git a/src/libsystemd/sd-netlink/netlink-util.h b/src/libsystemd/sd-netlink/netlink-util.h
index 7c35a2cfa7..882a616310 100644
--- a/src/libsystemd/sd-netlink/netlink-util.h
+++ b/src/libsystemd/sd-netlink/netlink-util.h
@@ -19,7 +19,9 @@ static inline bool rtnl_message_type_is_route(uint16_t type) {
 }
 
 static inline bool rtnl_message_type_is_link(uint16_t type) {
-        return IN_SET(type, RTM_NEWLINK, RTM_SETLINK, RTM_GETLINK, RTM_DELLINK);
+        return IN_SET(type,
+                      RTM_NEWLINK, RTM_SETLINK, RTM_GETLINK, RTM_DELLINK,
+                      RTM_NEWLINKPROP, RTM_DELLINKPROP, RTM_GETLINKPROP);
 }
 
 static inline bool rtnl_message_type_is_addr(uint16_t type) {
diff --git a/src/libsystemd/sd-netlink/rtnl-message.c b/src/libsystemd/sd-netlink/rtnl-message.c
index 4416e1720c..369c402986 100644
--- a/src/libsystemd/sd-netlink/rtnl-message.c
+++ b/src/libsystemd/sd-netlink/rtnl-message.c
@@ -449,6 +449,8 @@ int sd_rtnl_message_new_link(sd_netlink *rtnl, sd_netlink_message **ret,
 
         if (nlmsg_type == RTM_NEWLINK)
                 (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL;
+        else if (nlmsg_type == RTM_NEWLINK)
+                (*ret)->hdr->nlmsg_flags |= NLM_F_EXCL | NLM_F_CREATE | NLM_F_APPEND;
 
         ifi = NLMSG_DATA((*ret)->hdr);