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dpif: Refactor datapath feature detection.

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Various functions in ofproto-dpif and dpif-netlink detect support for
features in very similar ways. Refactor their common code to a single
function.

Signed-off-by: Joe Stringer <joestringer@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Joe Stringer
2014-10-29 14:00:14 -07:00
parent bff6067904
commit 2c85851f8e
4 changed files with 50 additions and 82 deletions
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44
lib/dpif-netlink.c
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@@ -1333,19 +1333,6 @@ dpif_netlink_init_flow_del(struct dpif_netlink *dpif,
request);
}
static int
dpif_netlink_flow_del(struct dpif_netlink *dpif,
const struct nlattr *key, size_t key_len,
const ovs_u128 *ufid, bool terse)
{
struct dpif_netlink_flow request;
dpif_netlink_init_flow_del__(dpif, key, key_len, ufid, terse, &request);
/* Ignore stats */
return dpif_netlink_flow_transact(&request, NULL, NULL);
}
struct dpif_netlink_flow_dump {
struct dpif_flow_dump up;
struct nl_dump nl_dump;
@@ -1746,14 +1733,10 @@ dpif_netlink_handler_uninit(struct dpif_handler *handler)
static bool
dpif_netlink_check_ufid__(struct dpif *dpif_)
{
struct dpif_netlink *dpif = dpif_netlink_cast(dpif_);
struct flow flow;
struct odputil_keybuf keybuf;
struct ofpbuf key, *replybuf;
struct dpif_netlink_flow reply;
struct ofpbuf key;
ovs_u128 ufid;
int error;
bool enable_ufid = false;
memset(&flow, 0, sizeof flow);
flow.dl_type = htons(0x1234);
@@ -1761,31 +1744,8 @@ dpif_netlink_check_ufid__(struct dpif *dpif_)
ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
odp_flow_key_from_flow(&key, &flow, NULL, 0, true);
dpif_flow_hash(dpif_, ofpbuf_data(&key), ofpbuf_size(&key), &ufid);
error = dpif_flow_put(dpif_, DPIF_FP_CREATE | DPIF_FP_PROBE,
ofpbuf_data(&key), ofpbuf_size(&key), NULL, 0, NULL,
0, &ufid, NULL);
if (error && error != EEXIST) {
VLOG_WARN("%s: UFID feature probe failed (%s).",
dpif_name(dpif_), ovs_strerror(error));
return false;
}
error = dpif_netlink_flow_get__(dpif, NULL, 0, &ufid, true, &reply,
&replybuf);
if (!error && reply.ufid_present && ovs_u128_equal(&ufid, &reply.ufid)) {
enable_ufid = true;
}
ofpbuf_delete(replybuf);
error = dpif_netlink_flow_del(dpif, ofpbuf_data(&key), ofpbuf_size(&key),
&ufid, false);
if (error) {
VLOG_WARN("%s: failed to delete UFID feature probe flow",
dpif_name(dpif_));
}
return enable_ufid;
return dpif_probe_feature(dpif_, "UFID", &key, &ufid);
}
static bool