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| author |   Arad, Ronen <ronen.arad@intel.com> | 2015-10-19 09:23:28 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-10-21 19:15:20 -0700 |
| commit | b1974ed05ea90264d534a200e8a13932ad55f8b8 (patch) | |
| tree | 854bca789c6a4e38dadbb9e5373742b970830fe7 /include/net/rtnetlink.h | |
| parent | Adding switchdev ageing notification on port bridged (diff) | |
| download | linux-dev-b1974ed05ea90264d534a200e8a13932ad55f8b8.tar.xz linux-dev-b1974ed05ea90264d534a200e8a13932ad55f8b8.zip | |
netlink: Rightsize IFLA_AF_SPEC size calculation
if_nlmsg_size() overestimates the minimum allocation size of netlink
dump request (when called from rtnl_calcit()) or the size of the
message (when called from rtnl_getlink()). This is because
ext_filter_mask is not supported by rtnl_link_get_af_size() and
rtnl_link_get_size().
The over-estimation is significant when at least one netdev has many
VLANs configured (8 bytes for each configured VLAN).
This patch-set "rightsizes" the protocol specific attribute size
calculation by propagating ext_filter_mask to rtnl_link_get_af_size()
and adding this a argument to get_link_af_size op in rtnl_af_ops.
Bridge module already used filtering aware sizing for notifications.
br_get_link_af_size_filtered() is consistent with the modified
get_link_af_size op so it replaces br_get_link_af_size() in br_af_ops.
br_get_link_af_size() becomes unused and thus removed.
Signed-off-by: Ronen Arad <ronen.arad@intel.com>
Acked-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/rtnetlink.h')
| -rw-r--r-- | include/net/rtnetlink.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/net/rtnetlink.h b/include/net/rtnetlink.h index aff6ceb891a9..2f87c1ba13de 100644 --- a/include/net/rtnetlink.h +++ b/include/net/rtnetlink.h @@ -124,7 +124,8 @@ struct rtnl_af_ops { int (*fill_link_af)(struct sk_buff *skb, const struct net_device *dev, u32 ext_filter_mask); - size_t (*get_link_af_size)(const struct net_device *dev); + size_t (*get_link_af_size)(const struct net_device *dev, + u32 ext_filter_mask); int (*validate_link_af)(const struct net_device *dev, const struct nlattr *attr); |