[v5,2/3] kni: support async user request
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Commit Message
Adding async userspace requests which don't wait for the userspace
response and always return success. This is preparation to address a
regression in KNI.
Signed-off-by: Elad Nachman <eladv6@gmail.com>
Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
---
kernel/linux/kni/kni_net.c | 9 +++++++++
lib/librte_kni/rte_kni.c | 7 +++++--
lib/librte_kni/rte_kni_common.h | 1 +
3 files changed, 15 insertions(+), 2 deletions(-)
@@ -124,6 +124,14 @@ kni_net_process_request(struct net_device *dev, struct rte_kni_request *req)
goto fail;
}
+ /* No result available since request is handled
+ * asynchronously. set response to success.
+ */
+ if (req->async != 0) {
+ req->result = 0;
+ goto async;
+ }
+
ret_val = wait_event_interruptible_timeout(kni->wq,
kni_fifo_count(kni->resp_q), 3 * HZ);
if (signal_pending(current) || ret_val <= 0) {
@@ -139,6 +147,7 @@ kni_net_process_request(struct net_device *dev, struct rte_kni_request *req)
}
memcpy(req, kni->sync_kva, sizeof(struct rte_kni_request));
+async:
ret = 0;
fail:
@@ -591,8 +591,11 @@ rte_kni_handle_request(struct rte_kni *kni)
break;
}
- /* Construct response mbuf and put it back to resp_q */
- ret = kni_fifo_put(kni->resp_q, (void **)&req, 1);
+ /* if needed, construct response buffer and put it back to resp_q */
+ if (!req->async)
+ ret = kni_fifo_put(kni->resp_q, (void **)&req, 1);
+ else
+ ret = 1;
if (ret != 1) {
RTE_LOG(ERR, KNI, "Fail to put the muf back to resp_q\n");
return -1; /* It is an error of can't putting the mbuf back */
@@ -48,6 +48,7 @@ struct rte_kni_request {
uint8_t promiscusity;/**< 1: promisc mode enable, 0: disable */
uint8_t allmulti; /**< 1: all-multicast mode enable, 0: disable */
};
+ int32_t async : 1; /**< 1: request is asynchronous */
int32_t result; /**< Result for processing request */
} __attribute__((__packed__));