[v5,3/5] net/tap: fix check for mbuf's nb_segs failure
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Commit Message
From: Yunjian Wang <wangyunjian@huawei.com>
Now the rxq->pool is mbuf concatenation, but its nb_segs is 1. When
conducting some sanity checks on the mbuf with debug enabled, it fails.
Fixes: 0781f5762cfe ("net/tap: support segmented mbufs")
CC: stable@dpdk.org
Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
---
drivers/net/tap/rte_eth_tap.c | 25 +++++++++++++++++++++----
1 file changed, 21 insertions(+), 4 deletions(-)
@@ -339,6 +339,23 @@ tap_rx_offload_get_queue_capa(void)
DEV_RX_OFFLOAD_TCP_CKSUM;
}
+static void
+tap_rxq_pool_free(struct rte_mbuf *pool)
+{
+ struct rte_mbuf *mbuf = pool;
+ uint16_t nb_segs = 1;
+
+ if (mbuf == NULL)
+ return;
+
+ while (mbuf->next) {
+ mbuf = mbuf->next;
+ nb_segs++;
+ }
+ pool->nb_segs = nb_segs;
+ rte_pktmbuf_free(pool);
+}
+
/* Callback to handle the rx burst of packets to the correct interface and
* file descriptor(s) in a multi-queue setup.
*/
@@ -389,7 +406,7 @@ pmd_rx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
goto end;
seg->next = NULL;
- rte_pktmbuf_free(mbuf);
+ tap_rxq_pool_free(mbuf);
goto end;
}
@@ -1038,7 +1055,7 @@ tap_dev_close(struct rte_eth_dev *dev)
rxq = &internals->rxq[i];
close(process_private->rxq_fds[i]);
process_private->rxq_fds[i] = -1;
- rte_pktmbuf_free(rxq->pool);
+ tap_rxq_pool_free(rxq->pool);
rte_free(rxq->iovecs);
rxq->pool = NULL;
rxq->iovecs = NULL;
@@ -1077,7 +1094,7 @@ tap_rx_queue_release(void *queue)
if (process_private->rxq_fds[rxq->queue_id] > 0) {
close(process_private->rxq_fds[rxq->queue_id]);
process_private->rxq_fds[rxq->queue_id] = -1;
- rte_pktmbuf_free(rxq->pool);
+ tap_rxq_pool_free(rxq->pool);
rte_free(rxq->iovecs);
rxq->pool = NULL;
rxq->iovecs = NULL;
@@ -1485,7 +1502,7 @@ tap_rx_queue_setup(struct rte_eth_dev *dev,
return 0;
error:
- rte_pktmbuf_free(rxq->pool);
+ tap_rxq_pool_free(rxq->pool);
rxq->pool = NULL;
rte_free(rxq->iovecs);
rxq->iovecs = NULL;