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Code Issues Releases Wiki Activity

dpif: Simplify dpif_execute_helper_cb()

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The may_steal flag is now used, Remove OVS_UNUSED.

Since dp_packet_delete() handles the NULL pointer properly, we can
drop a few tracking variables, and make the code easier to follow.

Signed-off-by: Andy Zhou <azhou@ovn.org>
Acked-by: Jarno Rajahalme <jarno@ovn.org>
This commit is contained in:
Andy Zhou
2017-01-11 15:26:27 -08:00
parent c296d3f839
commit 18b585928e
1 changed files with 12 additions and 19 deletions
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31
lib/dpif.c
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@@ -1107,12 +1107,11 @@ struct dpif_execute_helper_aux {
* meaningful. */
static void
dpif_execute_helper_cb(void *aux_, struct dp_packet_batch *packets_,
const struct nlattr *action, bool may_steal OVS_UNUSED)
const struct nlattr *action, bool may_steal)
{
struct dpif_execute_helper_aux *aux = aux_;
int type = nl_attr_type(action);
struct dp_packet *packet = packets_->packets[0];
struct dp_packet *trunc_packet = NULL, *orig_packet;
ovs_assert(packets_->count == 1);
@@ -1127,8 +1126,7 @@ dpif_execute_helper_cb(void *aux_, struct dp_packet_batch *packets_,
struct ofpbuf execute_actions;
uint64_t stub[256 / 8];
struct pkt_metadata *md = &packet->md;
bool dst_set, clone = false;
uint32_t cutlen = dp_packet_get_cutlen(packet);
bool dst_set;
dst_set = flow_tnl_dst_is_set(&md->tunnel);
if (dst_set) {
@@ -1146,20 +1144,17 @@ dpif_execute_helper_cb(void *aux_, struct dp_packet_batch *packets_,
execute.actions_len = NLA_ALIGN(action->nla_len);
}
orig_packet = packet;
if (cutlen > 0 && (type == OVS_ACTION_ATTR_OUTPUT ||
type == OVS_ACTION_ATTR_TUNNEL_PUSH ||
type == OVS_ACTION_ATTR_TUNNEL_POP ||
type == OVS_ACTION_ATTR_USERSPACE)) {
struct dp_packet *clone = NULL;
uint32_t cutlen = dp_packet_get_cutlen(packet);
if (cutlen && (type == OVS_ACTION_ATTR_OUTPUT
|| type == OVS_ACTION_ATTR_TUNNEL_PUSH
|| type == OVS_ACTION_ATTR_TUNNEL_POP
|| type == OVS_ACTION_ATTR_USERSPACE)) {
dp_packet_reset_cutlen(packet);
if (!may_steal) {
trunc_packet = dp_packet_clone(packet);
packet = trunc_packet;
clone = true;
packet = clone = dp_packet_clone(packet);
}
dp_packet_set_size(packet, dp_packet_size(packet) - cutlen);
dp_packet_reset_cutlen(orig_packet);
}
execute.packet = packet;
@@ -1170,13 +1165,11 @@ dpif_execute_helper_cb(void *aux_, struct dp_packet_batch *packets_,
aux->error = dpif_execute(aux->dpif, &execute);
log_execute_message(aux->dpif, &execute, true, aux->error);
dp_packet_delete(clone);
if (dst_set) {
ofpbuf_uninit(&execute_actions);
}
if (clone) {
dp_packet_delete(trunc_packet);
}
break;
}