The TX function is shared between TAP and TUN PMD. Checking TUN-TAP
type field will ensure the TAP PMD will always have protocol field
as 0.
Signed-off-by: Vipin Varghese <vipin.vargh...@intel.com>
Suggested-by: Ferruh Yigit <ferruh.yi...@intel.com>
---
Changes in V2:
updated in comment wording - Keith Wiles
remove debug print from tx code - Keith Wiles
---
drivers/net/tap/rte_eth_tap.c | 48 ++++++++++++++++++++++++++-----------------
drivers/net/tap/rte_eth_tap.h | 10 +++++++++
2 files changed, 39 insertions(+), 19 deletions(-)
diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index ea6d899..fafd557 100644
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -115,7 +115,8 @@ tun_alloc(struct pmd_internals *pmd)
* Do not set IFF_NO_PI as packet information header will be needed
* to check if a received packet has been truncated.
*/
- ifr.ifr_flags = (tap_type) ? IFF_TAP : IFF_TUN | IFF_POINTOPOINT;
+ ifr.ifr_flags = (pmd->type == ETH_TUNTAP_TYPE_TAP) ?
+ IFF_TAP : IFF_TUN | IFF_POINTOPOINT;
snprintf(ifr.ifr_name, IFNAMSIZ, "%s", pmd->name);
TAP_LOG(DEBUG, "ifr_name '%s'", ifr.ifr_name);
@@ -502,20 +503,22 @@ pmd_tx_burst(void *queue, struct rte_mbuf **bufs,
uint16_t nb_pkts)
if (rte_pktmbuf_pkt_len(mbuf) > max_size)
break;
- /*
- * TUN and TAP are created with IFF_NO_PI disabled.
- * For TUN PMD this mandatory as fields are used by
- * Kernel tun.c to determine whether its IP or non IP
- * packets.
- *
- * The logic fetches the first byte of data from mbuf.
- * compares whether its v4 or v6. If none matches default
- * value 0x00 is taken for protocol field.
- */
- char *buff_data = rte_pktmbuf_mtod(seg, void *);
- j = (*buff_data & 0xf0);
- pi.proto = (j == 0x40) ? 0x0008 :
- (j == 0x60) ? 0xdd86 : 0x00;
+ if (txq->type == ETH_TUNTAP_TYPE_TUN) {
+ /*
+ * TUN and TAP are created with IFF_NO_PI disabled.
+ * For TUN PMD this mandatory as fields are used by
+ * Kernel tun.c to determine whether its IP or non IP
+ * packets.
+ *
+ * The logic fetches the first byte of data from mbuf
+ * then compares whether its v4 or v6. If first byte
+ * is 4 or 6, then protocol field is updated.
+ */
+ char *buff_data = rte_pktmbuf_mtod(seg, void *);
+ j = (*buff_data & 0xf0);
+ pi.proto = (j == 0x40) ? 0x0008 :
+ (j == 0x60) ? 0xdd86 : 0x00;
+ }
iovecs[0].iov_base = π
iovecs[0].iov_len = sizeof(pi);
@@ -1052,6 +1055,9 @@ tap_setup_queue(struct rte_eth_dev *dev,
tx->mtu = &dev->data->mtu;
rx->rxmode = &dev->data->dev_conf.rxmode;
+ tx->type = pmd->type;
+ rx->type = pmd->type;
+
return *fd;
}
@@ -1386,6 +1392,7 @@ eth_dev_tap_create(struct rte_vdev_device *vdev, char
*tap_name,
pmd = dev->data->dev_private;
pmd->dev = dev;
snprintf(pmd->name, sizeof(pmd->name), "%s", tap_name);
+ pmd->type = ETH_TUNTAP_TYPE_UNKNOWN;
pmd->ioctl_sock = socket(AF_INET, SOCK_DGRAM, 0);
if (pmd->ioctl_sock == -1) {
@@ -1421,7 +1428,9 @@ eth_dev_tap_create(struct rte_vdev_device *vdev, char
*tap_name,
pmd->txq[i].fd = -1;
}
- if (tap_type) {
+ pmd->type = (tap_type) ? ETH_TUNTAP_TYPE_TAP : ETH_TUNTAP_TYPE_TUN;
+
+ if (pmd->type == ETH_TUNTAP_TYPE_TAP) {
if (is_zero_ether_addr(mac_addr))
eth_random_addr((uint8_t *)&pmd->eth_addr);
else
@@ -1440,7 +1449,7 @@ eth_dev_tap_create(struct rte_vdev_device *vdev, char
*tap_name,
if (tap_ioctl(pmd, SIOCSIFMTU, &ifr, 1, LOCAL_AND_REMOTE) < 0)
goto error_exit;
- if (tap_type) {
+ if (pmd->type == ETH_TUNTAP_TYPE_TAP) {
memset(&ifr, 0, sizeof(struct ifreq));
ifr.ifr_hwaddr.sa_family = AF_LOCAL;
rte_memcpy(ifr.ifr_hwaddr.sa_data, &pmd->eth_addr,
@@ -1812,7 +1821,9 @@ rte_pmd_tap_remove(struct rte_vdev_device *dev)
struct pmd_internals *internals;
int i;
- TAP_LOG(DEBUG, "Closing TUN/TAP Ethernet device on numa %u",
+ internals = eth_dev->data->dev_private;
+ TAP_LOG(DEBUG, "Closing %s Ethernet device on numa %u",
+ (internals->type == ETH_TUNTAP_TYPE_TAP) ? "TAP" : "TUN",
rte_socket_id());
/* find the ethdev entry */
@@ -1820,7 +1831,6 @@ rte_pmd_tap_remove(struct rte_vdev_device *dev)
if (!eth_dev)
return 0;
- internals = eth_dev->data->dev_private;
if (internals->nlsk_fd) {
tap_flow_flush(eth_dev, NULL);
tap_flow_implicit_flush(internals, NULL);
diff --git a/drivers/net/tap/rte_eth_tap.h b/drivers/net/tap/rte_eth_tap.h
index 67c9d4b..8b0da5a 100644
--- a/drivers/net/tap/rte_eth_tap.h
+++ b/drivers/net/tap/rte_eth_tap.h
@@ -23,6 +23,13 @@
#define RTE_PMD_TAP_MAX_QUEUES 1
#endif
+enum rte_tuntap_type {
+ ETH_TUNTAP_TYPE_UNKNOWN,
+ ETH_TUNTAP_TYPE_TUN,
+ ETH_TUNTAP_TYPE_TAP,
+ ETH_TUNTAP_TYPE_MAX,
+};
+
struct pkt_stats {
uint64_t opackets; /* Number of output packets */
uint64_t ipackets; /* Number of input packets */
@@ -38,6 +45,7 @@ struct rx_queue {
uint32_t trigger_seen; /* Last seen Rx trigger value */
uint16_t in_port; /* Port ID */
int fd;
+ int type; /* Type field - TUN|TAP */
struct pkt_stats stats; /* Stats for this RX queue */
uint16_t nb_rx_desc; /* max number of mbufs available */
struct rte_eth_rxmode *rxmode; /* RX features */
@@ -48,6 +56,7 @@ struct rx_queue {
struct tx_queue {
int fd;
+ int type; /* Type field - TUN|TAP */
uint16_t *mtu; /* Pointer to MTU from dev_data */
uint16_t csum:1; /* Enable checksum offloading */
struct pkt_stats stats; /* Stats for this TX queue */
@@ -57,6 +66,7 @@ struct pmd_internals {
struct rte_eth_dev *dev; /* Ethernet device. */
char remote_iface[RTE_ETH_NAME_MAX_LEN]; /* Remote netdevice name */
char name[RTE_ETH_NAME_MAX_LEN]; /* Internal Tap device name */
+ int type; /* Type field - TUN|TAP */
struct ether_addr eth_addr; /* Mac address of the device port */
struct ifreq remote_initial_flags; /* Remote netdevice flags on init
*/
int remote_if_index; /* remote netdevice IF_INDEX */
--
2.7.4
