diff mbox

[dpdk-dev] bond: vlan flags misinterpreted in xmit_slave_hash function

Message ID 1418728549-31244-1-git-send-email-declan.doherty@intel.com (mailing list archive)
State Superseded, archived
Headers show

Commit Message

Doherty, Declan Dec. 16, 2014, 11:15 a.m. UTC
- Split transmit hashing function into separate functions to reduce branching
  and to make code clearer.
- Add IPv4 IHL parameters to rte_ip.h
- Fixed VLAN tag support in hashing functions and add support for TCP
  in layer 4 header hashing.
- Fixed incorrect flag set in test application packet generator.

Signed-off-by: Declan Doherty <declan.doherty@intel.com>
---
 app/test/packet_burst_generator.c          |   2 +-
 lib/librte_net/rte_ip.h                    |   2 +
 lib/librte_pmd_bond/rte_eth_bond_api.c     |   8 ++
 lib/librte_pmd_bond/rte_eth_bond_pmd.c     | 161 ++++++++++++++++-------------
 lib/librte_pmd_bond/rte_eth_bond_private.h |  15 +++
 5 files changed, 115 insertions(+), 73 deletions(-)

Comments

Thomas Monjalon Dec. 16, 2014, 11:22 a.m. UTC | #1
Hi Declan,

2014-12-16 11:15, Declan Doherty:
> - Split transmit hashing function into separate functions to reduce branching
>   and to make code clearer.
> - Add IPv4 IHL parameters to rte_ip.h
> - Fixed VLAN tag support in hashing functions and add support for TCP
>   in layer 4 header hashing.
> - Fixed incorrect flag set in test application packet generator.

You forgot to describe the problem you are solving.

You seem fixing something but I'm afraid this patch is too big to be safely
integrated in 1.8.0.
Was it your goal?

> Signed-off-by: Declan Doherty <declan.doherty@intel.com>
> ---
>  app/test/packet_burst_generator.c          |   2 +-
>  lib/librte_net/rte_ip.h                    |   2 +
>  lib/librte_pmd_bond/rte_eth_bond_api.c     |   8 ++
>  lib/librte_pmd_bond/rte_eth_bond_pmd.c     | 161 ++++++++++++++++-------------
>  lib/librte_pmd_bond/rte_eth_bond_private.h |  15 +++
>  5 files changed, 115 insertions(+), 73 deletions(-)
> 
[...]
> --- a/lib/librte_net/rte_ip.h
> +++ b/lib/librte_net/rte_ip.h
> @@ -109,6 +109,8 @@ struct ipv4_hdr {
>  					   (((b) & 0xff) << 16) | \
>  					   (((c) & 0xff) << 8)  | \
>  					   ((d) & 0xff))
> +#define IPV4_HDR_IHL_MASK	(0x0f)
> +#define IPV4_FIELD_WIDTH	(4)

These new definitions require some doxygen comments.

Thanks
Wodkowski, PawelX Dec. 16, 2014, 11:44 a.m. UTC | #2
> -----Original Message-----
> From: Doherty, Declan
> Sent: Tuesday, December 16, 2014 12:16 PM
> To: dev@dpdk.org
> Cc: Wodkowski, PawelX; Doherty, Declan
> Subject: [PATCH] bond: vlan flags misinterpreted in xmit_slave_hash function
> 
> - Split transmit hashing function into separate functions to reduce branching
>   and to make code clearer.
> - Add IPv4 IHL parameters to rte_ip.h
> - Fixed VLAN tag support in hashing functions and add support for TCP
>   in layer 4 header hashing.
> - Fixed incorrect flag set in test application packet generator.
> 
> Signed-off-by: Declan Doherty <declan.doherty@intel.com>


Acked-by: Wodkowski, Pawel <pawelx.wodkowski@intel.com>
diff mbox

Patch

diff --git a/app/test/packet_burst_generator.c b/app/test/packet_burst_generator.c
index b2824dc..4a89663 100644
--- a/app/test/packet_burst_generator.c
+++ b/app/test/packet_burst_generator.c
@@ -97,7 +97,7 @@  initialize_eth_header(struct ether_hdr *eth_hdr, struct ether_addr *src_mac,
 		vhdr->eth_proto =  rte_cpu_to_be_16(ETHER_TYPE_IPv4);
 		vhdr->vlan_tci = van_id;
 	} else {
-		eth_hdr->ether_type = rte_cpu_to_be_16(ETHER_TYPE_VLAN);
+		eth_hdr->ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
 	}
 
 }
diff --git a/lib/librte_net/rte_ip.h b/lib/librte_net/rte_ip.h
index 46f0497..c97ee0a 100644
--- a/lib/librte_net/rte_ip.h
+++ b/lib/librte_net/rte_ip.h
@@ -109,6 +109,8 @@  struct ipv4_hdr {
 					   (((b) & 0xff) << 16) | \
 					   (((c) & 0xff) << 8)  | \
 					   ((d) & 0xff))
+#define IPV4_HDR_IHL_MASK	(0x0f)
+#define IPV4_FIELD_WIDTH	(4)
 
 /* Fragment Offset * Flags. */
 #define	IPV4_HDR_DF_SHIFT	14
diff --git a/lib/librte_pmd_bond/rte_eth_bond_api.c b/lib/librte_pmd_bond/rte_eth_bond_api.c
index ef5ddf4..fb015a8 100644
--- a/lib/librte_pmd_bond/rte_eth_bond_api.c
+++ b/lib/librte_pmd_bond/rte_eth_bond_api.c
@@ -268,6 +268,7 @@  rte_eth_bond_create(const char *name, uint8_t mode, uint8_t socket_id)
 	internals->mode = BONDING_MODE_INVALID;
 	internals->current_primary_port = 0;
 	internals->balance_xmit_policy = BALANCE_XMIT_POLICY_LAYER2;
+	internals->xmit_hash = xmit_l2_hash;
 	internals->user_defined_mac = 0;
 	internals->link_props_set = 0;
 
@@ -710,9 +711,16 @@  rte_eth_bond_xmit_policy_set(uint8_t bonded_port_id, uint8_t policy)
 
 	switch (policy) {
 	case BALANCE_XMIT_POLICY_LAYER2:
+		internals->balance_xmit_policy = policy;
+		internals->xmit_hash = xmit_l2_hash;
+		break;
 	case BALANCE_XMIT_POLICY_LAYER23:
+		internals->balance_xmit_policy = policy;
+		internals->xmit_hash = xmit_l23_hash;
+		break;
 	case BALANCE_XMIT_POLICY_LAYER34:
 		internals->balance_xmit_policy = policy;
+		internals->xmit_hash = xmit_l34_hash;
 		break;
 
 	default:
diff --git a/lib/librte_pmd_bond/rte_eth_bond_pmd.c b/lib/librte_pmd_bond/rte_eth_bond_pmd.c
index 3db473b..dc1a828 100644
--- a/lib/librte_pmd_bond/rte_eth_bond_pmd.c
+++ b/lib/librte_pmd_bond/rte_eth_bond_pmd.c
@@ -31,6 +31,8 @@ 
  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #include <stdlib.h>
+#include <netinet/in.h>
+
 #include <rte_mbuf.h>
 #include <rte_malloc.h>
 #include <rte_ethdev.h>
@@ -48,6 +50,9 @@ 
 #include "rte_eth_bond_8023ad_private.h"
 
 #define REORDER_PERIOD_MS 10
+
+#define HASH_L4_PORTS(h) ((h)->src_port ^ (h)->dst_port)
+
 /* Table for statistics in mode 5 TLB */
 static uint64_t tlb_last_obytets[RTE_MAX_ETHPORTS];
 
@@ -276,90 +281,104 @@  ipv6_hash(struct ipv6_hdr *ipv6_hdr)
 			(word_src_addr[3] ^ word_dst_addr[3]);
 }
 
-static uint32_t
-udp_hash(struct udp_hdr *hdr)
+static inline size_t
+get_vlan_offset(struct ether_hdr *eth_hdr)
 {
-	return hdr->src_port ^ hdr->dst_port;
+	size_t vlan_offset = 0;
+
+	/* Calculate VLAN offset */
+	if (rte_cpu_to_be_16(ETHER_TYPE_VLAN) == eth_hdr->ether_type) {
+		struct vlan_hdr *vlan_hdr = (struct vlan_hdr *)(eth_hdr + 1);
+		vlan_offset = sizeof(struct vlan_hdr);
+
+		while (rte_cpu_to_be_16(ETHER_TYPE_VLAN) ==
+				vlan_hdr->eth_proto) {
+			vlan_hdr = vlan_hdr + 1;
+			vlan_offset += sizeof(struct vlan_hdr);
+		}
+	}
+	return vlan_offset;
 }
 
-static inline uint16_t
-xmit_slave_hash(const struct rte_mbuf *buf, uint8_t slave_count, uint8_t policy)
+uint16_t
+xmit_l2_hash(const struct rte_mbuf *buf, uint8_t slave_count)
 {
-	struct ether_hdr *eth_hdr;
-	struct udp_hdr *udp_hdr;
-	size_t eth_offset = 0;
-	uint32_t hash = 0;
-
-	if (slave_count == 1)
-		return 0;
+	struct ether_hdr *eth_hdr = rte_pktmbuf_mtod(buf, struct ether_hdr *);
 
-	switch (policy) {
-	case BALANCE_XMIT_POLICY_LAYER2:
-		eth_hdr = rte_pktmbuf_mtod(buf, struct ether_hdr *);
+	uint32_t hash = ether_hash(eth_hdr);
 
-		hash = ether_hash(eth_hdr);
-		hash ^= hash >> 8;
-		return hash % slave_count;
+	return (hash ^= hash >> 8) % slave_count;
+}
 
-	case BALANCE_XMIT_POLICY_LAYER23:
-		eth_hdr = rte_pktmbuf_mtod(buf, struct ether_hdr *);
+uint16_t
+xmit_l23_hash(const struct rte_mbuf *buf, uint8_t slave_count)
+{
+	struct ether_hdr *eth_hdr = rte_pktmbuf_mtod(buf, struct ether_hdr *);
+	size_t vlan_offset = get_vlan_offset(eth_hdr);
+	uint32_t hash, l3hash = 0;
 
-		if (buf->ol_flags & PKT_RX_VLAN_PKT)
-			eth_offset = sizeof(struct ether_hdr) + sizeof(struct vlan_hdr);
-		else
-			eth_offset = sizeof(struct ether_hdr);
+	hash = ether_hash(eth_hdr);
 
-		if (buf->ol_flags & PKT_RX_IPV4_HDR) {
-			struct ipv4_hdr *ipv4_hdr;
-			ipv4_hdr = (struct ipv4_hdr *)(rte_pktmbuf_mtod(buf,
-					unsigned char *) + eth_offset);
+	if (buf->ol_flags & PKT_RX_IPV4_HDR) {
+		struct ipv4_hdr *ipv4_hdr = (struct ipv4_hdr *)
+				((char *)(eth_hdr + 1) + vlan_offset);
+		l3hash = ipv4_hash(ipv4_hdr);
 
-			hash = ether_hash(eth_hdr) ^ ipv4_hash(ipv4_hdr);
+	} else if  (buf->ol_flags & PKT_RX_IPV6_HDR) {
+		struct ipv6_hdr *ipv6_hdr = (struct ipv6_hdr *)
+				((char *)(eth_hdr + 1) + vlan_offset);
+		l3hash = ipv6_hash(ipv6_hdr);
+	}
 
-		} else {
-			struct ipv6_hdr *ipv6_hdr;
+	hash = hash ^ l3hash;
+	hash ^= hash >> 16;
+	hash ^= hash >> 8;
 
-			ipv6_hdr = (struct ipv6_hdr *)(rte_pktmbuf_mtod(buf,
-					unsigned char *) + eth_offset);
+	return hash % slave_count;
+}
 
-			hash = ether_hash(eth_hdr) ^ ipv6_hash(ipv6_hdr);
+uint16_t
+xmit_l34_hash(const struct rte_mbuf *buf, uint8_t slave_count)
+{
+	struct ether_hdr *eth_hdr = rte_pktmbuf_mtod(buf, struct ether_hdr *);
+	size_t vlan_offset = get_vlan_offset(eth_hdr);
+	struct udp_hdr *udp_hdr = NULL;
+	struct tcp_hdr *tcp_hdr = NULL;
+	uint32_t hash, l3hash = 0, l4hash = 0;
+
+	if (buf->ol_flags & PKT_RX_IPV4_HDR) {
+		struct ipv4_hdr *ipv4_hdr = (struct ipv4_hdr *)
+				((char *)(eth_hdr + 1) + vlan_offset);
+		size_t ip_hdr_offset;
+
+		l3hash = ipv4_hash(ipv4_hdr);
+
+		ip_hdr_offset = (ipv4_hdr->version_ihl & IPV4_HDR_IHL_MASK) * IPV4_FIELD_WIDTH;
+
+		if (ipv4_hdr->next_proto_id == IPPROTO_TCP) {
+			tcp_hdr = (struct tcp_hdr *)((char *)ipv4_hdr +
+					ip_hdr_offset);
+			l4hash = HASH_L4_PORTS(tcp_hdr);
+		} else if (ipv4_hdr->next_proto_id == IPPROTO_UDP) {
+			udp_hdr = (struct udp_hdr *)((char *)ipv4_hdr +
+					ip_hdr_offset);
+			l4hash = HASH_L4_PORTS(udp_hdr);
 		}
-		break;
-
-	case BALANCE_XMIT_POLICY_LAYER34:
-		if (buf->ol_flags & PKT_RX_VLAN_PKT)
-			eth_offset = sizeof(struct ether_hdr) + sizeof(struct vlan_hdr);
-		else
-			eth_offset = sizeof(struct ether_hdr);
-
-		if (buf->ol_flags & PKT_RX_IPV4_HDR) {
-			struct ipv4_hdr *ipv4_hdr = (struct ipv4_hdr *)
-					(rte_pktmbuf_mtod(buf, unsigned char *) + eth_offset);
-
-			if (ipv4_hdr->next_proto_id == IPPROTO_UDP) {
-				udp_hdr = (struct udp_hdr *)
-						(rte_pktmbuf_mtod(buf, unsigned char *) + eth_offset +
-								sizeof(struct ipv4_hdr));
-				hash = ipv4_hash(ipv4_hdr) ^ udp_hash(udp_hdr);
-			} else {
-				hash = ipv4_hash(ipv4_hdr);
-			}
-		} else {
-			struct ipv6_hdr *ipv6_hdr = (struct ipv6_hdr *)
-					(rte_pktmbuf_mtod(buf, unsigned char *) + eth_offset);
-
-			if (ipv6_hdr->proto == IPPROTO_UDP) {
-				udp_hdr = (struct udp_hdr *)
-						(rte_pktmbuf_mtod(buf, unsigned char *) + eth_offset +
-								sizeof(struct ipv6_hdr));
-				hash = ipv6_hash(ipv6_hdr) ^ udp_hash(udp_hdr);
-			} else {
-				hash = ipv6_hash(ipv6_hdr);
-			}
+	} else if  (buf->ol_flags & PKT_RX_IPV6_HDR) {
+		struct ipv6_hdr *ipv6_hdr = (struct ipv6_hdr *)
+				((char *)(eth_hdr + 1) + vlan_offset);
+		l3hash = ipv6_hash(ipv6_hdr);
+
+		if (ipv6_hdr->proto == IPPROTO_TCP) {
+			tcp_hdr = (struct tcp_hdr *)(ipv6_hdr + 1);
+			l4hash = HASH_L4_PORTS(tcp_hdr);
+		} else if (ipv6_hdr->proto == IPPROTO_UDP) {
+			udp_hdr = (struct udp_hdr *)(ipv6_hdr + 1);
+			l4hash = HASH_L4_PORTS(udp_hdr);
 		}
-		break;
 	}
 
+	hash = l3hash ^ l4hash;
 	hash ^= hash >> 16;
 	hash ^= hash >> 8;
 
@@ -536,8 +555,7 @@  bond_ethdev_tx_burst_balance(void *queue, struct rte_mbuf **bufs,
 	/* Populate slaves mbuf with the packets which are to be sent on it  */
 	for (i = 0; i < nb_pkts; i++) {
 		/* Select output slave using hash based on xmit policy */
-		op_slave_id = xmit_slave_hash(bufs[i], num_of_slaves,
-				internals->balance_xmit_policy);
+		op_slave_id = internals->xmit_hash(bufs[i], num_of_slaves);
 
 		/* Populate slave mbuf arrays with mbufs for that slave */
 		slave_bufs[op_slave_id][slave_nb_pkts[op_slave_id]++] = bufs[i];
@@ -575,7 +593,7 @@  bond_ethdev_tx_burst_8023ad(void *queue, struct rte_mbuf **bufs,
 
 	uint8_t num_of_slaves;
 	uint8_t slaves[RTE_MAX_ETHPORTS];
-	 /* possitions in slaves, not ID */
+	 /* positions in slaves, not ID */
 	uint8_t distributing_offsets[RTE_MAX_ETHPORTS];
 	uint8_t distributing_count;
 
@@ -622,8 +640,7 @@  bond_ethdev_tx_burst_8023ad(void *queue, struct rte_mbuf **bufs,
 		/* Populate slaves mbuf with the packets which are to be sent on it */
 		for (i = 0; i < nb_pkts; i++) {
 			/* Select output slave using hash based on xmit policy */
-			op_slave_idx = xmit_slave_hash(bufs[i], distributing_count,
-					internals->balance_xmit_policy);
+			op_slave_idx = internals->xmit_hash(bufs[i], distributing_count);
 
 			/* Populate slave mbuf arrays with mbufs for that slave. Use only
 			 * slaves that are currently distributing. */
diff --git a/lib/librte_pmd_bond/rte_eth_bond_private.h b/lib/librte_pmd_bond/rte_eth_bond_private.h
index f913c5b..e01e66b 100644
--- a/lib/librte_pmd_bond/rte_eth_bond_private.h
+++ b/lib/librte_pmd_bond/rte_eth_bond_private.h
@@ -108,6 +108,9 @@  struct bond_slave_details {
 	struct ether_addr persisted_mac_addr;
 };
 
+
+typedef uint16_t (*xmit_hash_t)(const struct rte_mbuf *buf, uint8_t slave_count);
+
 /** Link Bonding PMD device private configuration Structure */
 struct bond_dev_private {
 	uint8_t port_id;					/**< Port Id of Bonded Port */
@@ -122,6 +125,9 @@  struct bond_dev_private {
 
 	uint8_t balance_xmit_policy;
 	/**< Transmit policy - l2 / l23 / l34 for operation in balance mode */
+	xmit_hash_t xmit_hash;
+	/**< Transmit policy hash function */
+
 	uint8_t user_defined_mac;
 	/**< Flag for whether MAC address is user defined or not */
 	uint8_t promiscuous_en;
@@ -225,6 +231,15 @@  void
 slave_add(struct bond_dev_private *internals,
 		struct rte_eth_dev *slave_eth_dev);
 
+uint16_t
+xmit_l2_hash(const struct rte_mbuf *buf, uint8_t slave_count);
+
+uint16_t
+xmit_l23_hash(const struct rte_mbuf *buf, uint8_t slave_count);
+
+uint16_t
+xmit_l34_hash(const struct rte_mbuf *buf, uint8_t slave_count);
+
 void
 bond_ethdev_primary_set(struct bond_dev_private *internals,
 		uint8_t slave_port_id);