rtnetlink: count IFLA_PARENT_DEV_{NAME,BUS_NAME} in if_nlmsg_size

Commit 00e77ed8e64d ("rtnetlink: add IFLA_PARENT_[DEV|DEV_BUS]_NAME")
added those attributes to rtnl_fill_ifinfo, but forgot to extend
if_nlmsg_size.

Fixes: 00e77ed8e64d ("rtnetlink: add IFLA_PARENT_[DEV|DEV_BUS]_NAME")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Link: https://patch.msgid.link/0b849da95562af45487080528d60f578636aba5c.1773919462.git.sd@queasysnail.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index dad4b1054955bd89406af2dbbb1f5b0d333f1be6..0fe279432d82260a2228c2e11283feb7ee867e06 100644 (file)
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1267,6 +1267,21 @@ static size_t rtnl_dpll_pin_size(const struct net_device *dev)
        return size;
 }
 
+static size_t rtnl_dev_parent_size(const struct net_device *dev)
+{
+       size_t size = 0;
+
+       /* IFLA_PARENT_DEV_NAME */
+       if (dev->dev.parent)
+               size += nla_total_size(strlen(dev_name(dev->dev.parent)) + 1);
+
+       /* IFLA_PARENT_DEV_BUS_NAME */
+       if (dev->dev.parent && dev->dev.parent->bus)
+               size += nla_total_size(strlen(dev->dev.parent->bus->name) + 1);
+
+       return size;
+}
+
 static noinline size_t if_nlmsg_size(const struct net_device *dev,
                                     u32 ext_filter_mask)
 {
@@ -1328,6 +1343,7 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev,
               + nla_total_size(8)  /* IFLA_MAX_PACING_OFFLOAD_HORIZON */
               + nla_total_size(2)  /* IFLA_HEADROOM */
               + nla_total_size(2)  /* IFLA_TAILROOM */
+              + rtnl_dev_parent_size(dev)
               + 0;
 
        if (!(ext_filter_mask & RTEXT_FILTER_SKIP_STATS))