network/address: IFA_FLAGS is supported since kernel v3.14

Our kernel base line is now v5.4.

diff --git a/src/network/networkd-address.c b/src/network/networkd-address.c
index d0f0282075c597464e065b15dc1c2a0327117e91..3857aad047e6c9d67843406712efa51c76128c92 100644 (file)
--- a/src/network/networkd-address.c
+++ b/src/network/networkd-address.c
@@ -1148,7 +1148,6 @@ static void address_forget(Link *link, Address *address, bool removed_by_us, con
 }
 
 static int address_set_netlink_message(const Address *address, sd_netlink_message *m, Link *link) {
-        uint32_t flags;
         int r;
 
         assert(address);
@@ -1163,12 +1162,8 @@ static int address_set_netlink_message(const Address *address, sd_netlink_messag
          * flags except tentative flag here unconditionally. Without setting the flag, the template
          * addresses generated by kernel will not be removed automatically when the main address is
          * removed. */
-        flags = address->flags & ~IFA_F_TENTATIVE;
-        r = sd_rtnl_message_addr_set_flags(m, flags & 0xff);
-        if (r < 0)
-                return r;
-
-        if ((flags & ~0xff) != 0) {
+        uint32_t flags = address->flags & ~IFA_F_TENTATIVE;
+        if (flags != 0) {
                 r = sd_netlink_message_append_u32(m, IFA_FLAGS, flags);
                 if (r < 0)
                         return r;
@@ -1339,7 +1334,7 @@ int link_drop_ipv6ll_addresses(Link *link) {
 
         for (sd_netlink_message *addr = reply; addr; addr = sd_netlink_message_next(addr)) {
                 _cleanup_(address_unrefp) Address *a = NULL;
-                unsigned char flags, prefixlen;
+                unsigned char prefixlen;
                 struct in6_addr address;
                 int ifindex;
 
@@ -1352,9 +1347,10 @@ int link_drop_ipv6ll_addresses(Link *link) {
                 } else if (link->ifindex != ifindex)
                         continue;
 
-                r = sd_rtnl_message_addr_get_flags(addr, &flags);
+                uint32_t flags;
+                r = sd_netlink_message_read_u32(addr, IFA_FLAGS, &flags);
                 if (r < 0) {
-                        log_link_debug_errno(link, r, "rtnl: received address message without valid flags, ignoring: %m");
+                        log_link_debug_errno(link, r, "rtnl: Failed to read IFA_FLAGS attribute, ignoring: %m");
                         continue;
                 }
 
@@ -1971,14 +1967,7 @@ int manager_rtnl_process_address(sd_netlink *rtnl, sd_netlink_message *message,
         }
 
         r = sd_netlink_message_read_u32(message, IFA_FLAGS, &address->flags);
-        if (r == -ENODATA) {
-                unsigned char flags;
-
-                /* For old kernels. */
-                r = sd_rtnl_message_addr_get_flags(message, &flags);
-                if (r >= 0)
-                        address->flags = flags;
-        } else if (r < 0)
+        if (r < 0)
                 log_link_debug_errno(link, r, "rtnl: failed to read IFA_FLAGS attribute, ignoring: %m");
 
         struct ifa_cacheinfo cinfo;