[v5] net/netvsc: fix parsing of VLAN metadata
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Commit Message
The previous code incorrectly parsed the VLAN ID and priority.
If the 16-bits of VLAN ID and priority/CFI on the wire was
0123456789ABCDEF the code parsed it as 456789ABCDEF3012. There
were macros defined to handle this conversion but they were not
used.
Fixes: 4e9c73e96e83 ("net/netvsc: add Hyper-V network device")
Cc: sthemmin@microsoft.com
Cc: stable@dpdk.org
Signed-off-by: Alan Elder <alan.elder@microsoft.com>
---
v5:
* Move the VLAN parsing macros to rte_ether.h
v4:
* Make consistent with FreeBSD code
---
.mailmap | 1 +
drivers/net/netvsc/hn_rxtx.c | 8 ++++++--
lib/net/rte_ether.h | 16 ++++++++++++++++
3 files changed, 23 insertions(+), 2 deletions(-)
--
2.25.1
Comments
On Thu, 15 Feb 2024 18:12:35 +0000
Alan Elder <alan.elder@microsoft.com> wrote:
> +/* VLAN header fields */
> +#define RTE_VLAN_DEI_SHIFT 12
> +#define RTE_VLAN_PRI_SHIFT 13
> +#define RTE_VLAN_PRI_MASK 0xe000 /* Priority Code Point */
> +#define RTE_VLAN_DEI_MASK 0x1000 /* Drop Eligible Indicator */
> +#define RTE_VLAN_ID_MASK 0x0fff /* VLAN Identifier */
> +
> +#define RTE_VLAN_TCI_ID(vlan_tci) ((vlan_tci) & RTE_VLAN_ID_MASK)
> +#define RTE_VLAN_TCI_PRI(vlan_tci) (((vlan_tci) & RTE_VLAN_PRI_MASK) >> \
> + RTE_VLAN_PRI_SHIFT)
> +#define RTE_VLAN_TCI_DEI(vlan_tci) (((vlan_tci) & RTE_VLAN_DEI_MASK) >> \
> + RTE_VLAN_DEI_SHIFT)
> +#define RTE_VLAN_TCI_MAKE(id, pri, dei) ((id) | \
> + ((pri) << RTE_VLAN_PRI_SHIFT) | \
> + ((dei) << RTE_VLAN_DEI_SHIFT))
> +
With current DPDK standard max line length 100, the lines may not need to be broken any more.
On 2/15/2024 6:12 PM, Alan Elder wrote:
> The previous code incorrectly parsed the VLAN ID and priority.
> If the 16-bits of VLAN ID and priority/CFI on the wire was
> 0123456789ABCDEF the code parsed it as 456789ABCDEF3012. There
> were macros defined to handle this conversion but they were not
> used.
>
> Fixes: 4e9c73e96e83 ("net/netvsc: add Hyper-V network device")
> Cc: sthemmin@microsoft.com
> Cc: stable@dpdk.org
>
> Signed-off-by: Alan Elder <alan.elder@microsoft.com>
>
Thanks Alan, overall looks good to me.
Can you please make separate the lib/net patch?
As first patch lib/net updates, second updates the net/vetvsc.
> ---
> v5:
> * Move the VLAN parsing macros to rte_ether.h
>
> v4:
> * Make consistent with FreeBSD code
>
> ---
> .mailmap | 1 +
> drivers/net/netvsc/hn_rxtx.c | 8 ++++++--
> lib/net/rte_ether.h | 16 ++++++++++++++++
> 3 files changed, 23 insertions(+), 2 deletions(-)
>
> diff --git a/.mailmap b/.mailmap
> index a0756974e2..eca02318d6 100644
> --- a/.mailmap
> +++ b/.mailmap
> @@ -33,6 +33,7 @@ Alain Leon <xerebz@gmail.com>
> Alan Brady <alan.brady@intel.com>
> Alan Carew <alan.carew@intel.com>
> Alan Dewar <alan.dewar@att.com> <adewar@brocade.com>
> +Alan Elder <alan.elder@microsoft.com>
> Alan Liu <zaoxingliu@gmail.com>
> Alan Winkowski <walan@marvell.com>
> Alejandro Lucero <alejandro.lucero@netronome.com>
> diff --git a/drivers/net/netvsc/hn_rxtx.c b/drivers/net/netvsc/hn_rxtx.c
> index e4f5015aa3..9bf1ec5509 100644
> --- a/drivers/net/netvsc/hn_rxtx.c
> +++ b/drivers/net/netvsc/hn_rxtx.c
> @@ -612,7 +612,9 @@ static void hn_rxpkt(struct hn_rx_queue *rxq, struct hn_rx_bufinfo *rxb,
> RTE_PTYPE_L4_MASK);
>
> if (info->vlan_info != HN_NDIS_VLAN_INFO_INVALID) {
> - m->vlan_tci = info->vlan_info;
> + m->vlan_tci = RTE_VLAN_TCI_MAKE(NDIS_VLAN_INFO_ID(info->vlan_info),
> + NDIS_VLAN_INFO_PRI(info->vlan_info),
> + NDIS_VLAN_INFO_CFI(info->vlan_info));
>
Is there a good reason why format is not same as spec format?
@@ -33,6 +33,7 @@ Alain Leon <xerebz@gmail.com>
Alan Brady <alan.brady@intel.com>
Alan Carew <alan.carew@intel.com>
Alan Dewar <alan.dewar@att.com> <adewar@brocade.com>
+Alan Elder <alan.elder@microsoft.com>
Alan Liu <zaoxingliu@gmail.com>
Alan Winkowski <walan@marvell.com>
Alejandro Lucero <alejandro.lucero@netronome.com>
@@ -612,7 +612,9 @@ static void hn_rxpkt(struct hn_rx_queue *rxq, struct hn_rx_bufinfo *rxb,
RTE_PTYPE_L4_MASK);
if (info->vlan_info != HN_NDIS_VLAN_INFO_INVALID) {
- m->vlan_tci = info->vlan_info;
+ m->vlan_tci = RTE_VLAN_TCI_MAKE(NDIS_VLAN_INFO_ID(info->vlan_info),
+ NDIS_VLAN_INFO_PRI(info->vlan_info),
+ NDIS_VLAN_INFO_CFI(info->vlan_info));
m->ol_flags |= RTE_MBUF_F_RX_VLAN_STRIPPED | RTE_MBUF_F_RX_VLAN;
/* NDIS always strips tag, put it back if necessary */
@@ -1332,7 +1334,9 @@ static void hn_encap(struct rndis_packet_msg *pkt,
if (m->ol_flags & RTE_MBUF_F_TX_VLAN) {
pi_data = hn_rndis_pktinfo_append(pkt, NDIS_VLAN_INFO_SIZE,
NDIS_PKTINFO_TYPE_VLAN);
- *pi_data = m->vlan_tci;
+ *pi_data = NDIS_VLAN_INFO_MAKE(RTE_VLAN_TCI_ID(m->vlan_tci),
+ RTE_VLAN_TCI_PRI(m->vlan_tci),
+ RTE_VLAN_TCI_DEI(m->vlan_tci));
}
if (m->ol_flags & RTE_MBUF_F_TX_TCP_SEG) {
@@ -46,6 +46,22 @@ extern "C" {
#define RTE_ETHER_MIN_MTU 68 /**< Minimum MTU for IPv4 packets, see RFC 791. */
+/* VLAN header fields */
+#define RTE_VLAN_DEI_SHIFT 12
+#define RTE_VLAN_PRI_SHIFT 13
+#define RTE_VLAN_PRI_MASK 0xe000 /* Priority Code Point */
+#define RTE_VLAN_DEI_MASK 0x1000 /* Drop Eligible Indicator */
+#define RTE_VLAN_ID_MASK 0x0fff /* VLAN Identifier */
+
+#define RTE_VLAN_TCI_ID(vlan_tci) ((vlan_tci) & RTE_VLAN_ID_MASK)
+#define RTE_VLAN_TCI_PRI(vlan_tci) (((vlan_tci) & RTE_VLAN_PRI_MASK) >> \
+ RTE_VLAN_PRI_SHIFT)
+#define RTE_VLAN_TCI_DEI(vlan_tci) (((vlan_tci) & RTE_VLAN_DEI_MASK) >> \
+ RTE_VLAN_DEI_SHIFT)
+#define RTE_VLAN_TCI_MAKE(id, pri, dei) ((id) | \
+ ((pri) << RTE_VLAN_PRI_SHIFT) | \
+ ((dei) << RTE_VLAN_DEI_SHIFT))
+
/**
* Ethernet address:
* A universally administered address is uniquely assigned to a device by its