| Message ID | 1439333961-24474-2-git-send-email-joestringer@nicira.com |
|---|---|
| State | Awaiting Upstream, archived |
| Delegated to: | David Miller |
| Headers | show |
On Tue, Aug 11, 2015 at 3:59 PM, Joe Stringer <joestringer@nicira.com> wrote: > Previously, we used the kernel-internal netlink actions length to > calculate the size of messages to serialize back to userspace. > However,the sw_flow_actions may not be formatted exactly the same as the > actions on the wire, so store the original actions length when > de-serializing and re-use the original length when serializing. > > Signed-off-by: Joe Stringer <joestringer@nicira.com> Acked-by: Pravin B Shelar <pshelar@nicira.com> -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index ffe984f..d5b5473 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -713,7 +713,7 @@ static size_t ovs_flow_cmd_msg_size(const struct sw_flow_actions *acts, /* OVS_FLOW_ATTR_ACTIONS */ if (should_fill_actions(ufid_flags)) - len += nla_total_size(acts->actions_len); + len += nla_total_size(acts->orig_len); return len + nla_total_size(sizeof(struct ovs_flow_stats)) /* OVS_FLOW_ATTR_STATS */ diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h index b62cdb3..082a87b 100644 --- a/net/openvswitch/flow.h +++ b/net/openvswitch/flow.h @@ -144,6 +144,7 @@ struct sw_flow_id { struct sw_flow_actions { struct rcu_head rcu; + size_t orig_len; /* From flow_cmd_new netlink actions size */ u32 actions_len; struct nlattr actions[]; }; diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c index a6eb77a..96cad8c 100644 --- a/net/openvswitch/flow_netlink.c +++ b/net/openvswitch/flow_netlink.c @@ -1619,6 +1619,7 @@ static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa, memcpy(acts->actions, (*sfa)->actions, (*sfa)->actions_len); acts->actions_len = (*sfa)->actions_len; + acts->orig_len = (*sfa)->orig_len; kfree(*sfa); *sfa = acts; @@ -2223,6 +2224,7 @@ int ovs_nla_copy_actions(const struct nlattr *attr, if (IS_ERR(*sfa)) return PTR_ERR(*sfa); + (*sfa)->orig_len = nla_len(attr); err = __ovs_nla_copy_actions(attr, key, 0, sfa, key->eth.type, key->eth.tci, log); if (err)
Previously, we used the kernel-internal netlink actions length to calculate the size of messages to serialize back to userspace. However,the sw_flow_actions may not be formatted exactly the same as the actions on the wire, so store the original actions length when de-serializing and re-use the original length when serializing. Signed-off-by: Joe Stringer <joestringer@nicira.com> --- v2: No change. v3: Preserve original length across buffer resize. --- net/openvswitch/datapath.c | 2 +- net/openvswitch/flow.h | 1 + net/openvswitch/flow_netlink.c | 2 ++ 3 files changed, 4 insertions(+), 1 deletion(-)