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authorSven Eckelmann <sven@narfation.org>2021-05-10 16:05:42 +0300
committerSimon Wunderlich <sw@simonwunderlich.de>2021-05-17 13:00:44 +0300
commitd295345abb3e91e5a16f3293eb12b111e352bd2b (patch)
tree096e4a878336ee7c20d5abbbd9ca7f6cab0b80ca /net/batman-adv
parent9a959cab22194d633b3a1d9d1943b0df3475122c (diff)
downloadlinux-d295345abb3e91e5a16f3293eb12b111e352bd2b.tar.xz
batman-adv: Always send iface index+name in genlmsg
The batman-adv netlink messages often contain the interface index and interface name in the same message. This makes it easy for the receiver to operate on the incoming data when it either needs to print something or needs to operate on the interface index. But one of the attributes was missing for: * neighbor table dumps * originator table dumps * gateway list dumps * query of hardif information * query of vid information The userspace therefore had to implement special workarounds using SIOCGIFNAME or SIOCGIFINDEX depending on what was actually provided. Providing both information simplifies the userspace code massively without adding a lot of extra overhead in the kernel portion. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Diffstat (limited to 'net/batman-adv')
-rw-r--r--net/batman-adv/bat_iv_ogm.c6
-rw-r--r--net/batman-adv/bat_v.c10
-rw-r--r--net/batman-adv/netlink.c8
3 files changed, 24 insertions, 0 deletions
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 789f257be24f..680def809838 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -1849,6 +1849,8 @@ batadv_iv_ogm_orig_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq,
orig_node->orig) ||
nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN,
neigh_node->addr) ||
+ nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
+ neigh_node->if_incoming->net_dev->name) ||
nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
neigh_node->if_incoming->net_dev->ifindex) ||
nla_put_u8(msg, BATADV_ATTR_TQ, tq_avg) ||
@@ -2078,6 +2080,8 @@ batadv_iv_ogm_neigh_dump_neigh(struct sk_buff *msg, u32 portid, u32 seq,
if (nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN,
hardif_neigh->addr) ||
+ nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
+ hardif_neigh->if_incoming->net_dev->name) ||
nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
hardif_neigh->if_incoming->net_dev->ifindex) ||
nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS,
@@ -2459,6 +2463,8 @@ static int batadv_iv_gw_dump_entry(struct sk_buff *msg, u32 portid,
router->addr) ||
nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
router->if_incoming->net_dev->name) ||
+ nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
+ router->if_incoming->net_dev->ifindex) ||
nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_DOWN,
gw_node->bandwidth_down) ||
nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_UP,
diff --git a/net/batman-adv/bat_v.c b/net/batman-adv/bat_v.c
index e1ca2b8c3152..b98aea958e3d 100644
--- a/net/batman-adv/bat_v.c
+++ b/net/batman-adv/bat_v.c
@@ -146,6 +146,8 @@ batadv_v_neigh_dump_neigh(struct sk_buff *msg, u32 portid, u32 seq,
if (nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN,
hardif_neigh->addr) ||
+ nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
+ hardif_neigh->if_incoming->net_dev->name) ||
nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
hardif_neigh->if_incoming->net_dev->ifindex) ||
nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS,
@@ -298,6 +300,8 @@ batadv_v_orig_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq,
if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, orig_node->orig) ||
nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN,
neigh_node->addr) ||
+ nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
+ neigh_node->if_incoming->net_dev->name) ||
nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
neigh_node->if_incoming->net_dev->ifindex) ||
nla_put_u32(msg, BATADV_ATTR_THROUGHPUT, throughput) ||
@@ -739,6 +743,12 @@ static int batadv_v_gw_dump_entry(struct sk_buff *msg, u32 portid,
goto out;
}
+ if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
+ router->if_incoming->net_dev->ifindex)) {
+ genlmsg_cancel(msg, hdr);
+ goto out;
+ }
+
if (nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_DOWN,
gw_node->bandwidth_down)) {
genlmsg_cancel(msg, hdr);
diff --git a/net/batman-adv/netlink.c b/net/batman-adv/netlink.c
index f317d206b411..b6cc746e01a6 100644
--- a/net/batman-adv/netlink.c
+++ b/net/batman-adv/netlink.c
@@ -814,6 +814,10 @@ static int batadv_netlink_hardif_fill(struct sk_buff *msg,
bat_priv->soft_iface->ifindex))
goto nla_put_failure;
+ if (nla_put_string(msg, BATADV_ATTR_MESH_IFNAME,
+ bat_priv->soft_iface->name))
+ goto nla_put_failure;
+
if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
net_dev->ifindex) ||
nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
@@ -1045,6 +1049,10 @@ static int batadv_netlink_vlan_fill(struct sk_buff *msg,
bat_priv->soft_iface->ifindex))
goto nla_put_failure;
+ if (nla_put_string(msg, BATADV_ATTR_MESH_IFNAME,
+ bat_priv->soft_iface->name))
+ goto nla_put_failure;
+
if (nla_put_u32(msg, BATADV_ATTR_VLANID, vlan->vid & VLAN_VID_MASK))
goto nla_put_failure;