mirror of https://gitee.com/openkylin/linux.git
net/mlx5e: Refactor VXLAN tunnel encap offloading code
Separates the vxlan header encap logic from the general ipv4/6 encapsulation methods, thus allowing the common IP encap/decap code to branch in downstream patch to multiple IP tunnels. Code refactoring with no functional change. Signed-off-by: Oz Shlomo <ozsh@mellanox.com> Reviewed-by: Eli Britstein <elibr@mellanox.com> Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Oz Shlomo
Saeed Mahameed
parent
ef381359e3
commit
ea7162ac3a
|
|
@ -2416,70 +2416,25 @@ static int mlx5e_route_lookup_ipv6(struct mlx5e_priv *priv,
|
|||
return 0;
|
||||
}
|
||||
|
||||
static void gen_vxlan_header_ipv4(struct net_device *out_dev,
|
||||
char buf[], int encap_size,
|
||||
unsigned char h_dest[ETH_ALEN],
|
||||
u8 tos, u8 ttl,
|
||||
__be32 daddr,
|
||||
__be32 saddr,
|
||||
__be16 udp_dst_port,
|
||||
__be32 vx_vni)
|
||||
static int mlx5e_gen_vxlan_header(char buf[], struct ip_tunnel_key *tun_key)
|
||||
{
|
||||
struct ethhdr *eth = (struct ethhdr *)buf;
|
||||
struct iphdr *ip = (struct iphdr *)((char *)eth + sizeof(struct ethhdr));
|
||||
struct udphdr *udp = (struct udphdr *)((char *)ip + sizeof(struct iphdr));
|
||||
struct vxlanhdr *vxh = (struct vxlanhdr *)((char *)udp + sizeof(struct udphdr));
|
||||
__be32 tun_id = tunnel_id_to_key32(tun_key->tun_id);
|
||||
struct udphdr *udp = (struct udphdr *)(buf);
|
||||
struct vxlanhdr *vxh = (struct vxlanhdr *)
|
||||
((char *)udp + sizeof(struct udphdr));
|
||||
|
||||
memset(buf, 0, encap_size);
|
||||
|
||||
ether_addr_copy(eth->h_dest, h_dest);
|
||||
ether_addr_copy(eth->h_source, out_dev->dev_addr);
|
||||
eth->h_proto = htons(ETH_P_IP);
|
||||
|
||||
ip->daddr = daddr;
|
||||
ip->saddr = saddr;
|
||||
|
||||
ip->tos = tos;
|
||||
ip->ttl = ttl;
|
||||
ip->protocol = IPPROTO_UDP;
|
||||
ip->version = 0x4;
|
||||
ip->ihl = 0x5;
|
||||
|
||||
udp->dest = udp_dst_port;
|
||||
udp->dest = tun_key->tp_dst;
|
||||
vxh->vx_flags = VXLAN_HF_VNI;
|
||||
vxh->vx_vni = vxlan_vni_field(vx_vni);
|
||||
vxh->vx_vni = vxlan_vni_field(tun_id);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void gen_vxlan_header_ipv6(struct net_device *out_dev,
|
||||
char buf[], int encap_size,
|
||||
unsigned char h_dest[ETH_ALEN],
|
||||
u8 tos, u8 ttl,
|
||||
struct in6_addr *daddr,
|
||||
struct in6_addr *saddr,
|
||||
__be16 udp_dst_port,
|
||||
__be32 vx_vni)
|
||||
static int mlx5e_gen_ip_tunnel_header(char buf[], __u8 *ip_proto,
|
||||
struct ip_tunnel_key *tun_key)
|
||||
{
|
||||
struct ethhdr *eth = (struct ethhdr *)buf;
|
||||
struct ipv6hdr *ip6h = (struct ipv6hdr *)((char *)eth + sizeof(struct ethhdr));
|
||||
struct udphdr *udp = (struct udphdr *)((char *)ip6h + sizeof(struct ipv6hdr));
|
||||
struct vxlanhdr *vxh = (struct vxlanhdr *)((char *)udp + sizeof(struct udphdr));
|
||||
|
||||
memset(buf, 0, encap_size);
|
||||
|
||||
ether_addr_copy(eth->h_dest, h_dest);
|
||||
ether_addr_copy(eth->h_source, out_dev->dev_addr);
|
||||
eth->h_proto = htons(ETH_P_IPV6);
|
||||
|
||||
ip6_flow_hdr(ip6h, tos, 0);
|
||||
/* the HW fills up ipv6 payload len */
|
||||
ip6h->nexthdr = IPPROTO_UDP;
|
||||
ip6h->hop_limit = ttl;
|
||||
ip6h->daddr = *daddr;
|
||||
ip6h->saddr = *saddr;
|
||||
|
||||
udp->dest = udp_dst_port;
|
||||
vxh->vx_flags = VXLAN_HF_VNI;
|
||||
vxh->vx_vni = vxlan_vni_field(vx_vni);
|
||||
*ip_proto = IPPROTO_UDP;
|
||||
return mlx5e_gen_vxlan_header(buf, tun_key);
|
||||
}
|
||||
|
||||
static int mlx5e_create_encap_header_ipv4(struct mlx5e_priv *priv,
|
||||
|
|
@ -2487,13 +2442,17 @@ static int mlx5e_create_encap_header_ipv4(struct mlx5e_priv *priv,
|
|||
struct mlx5e_encap_entry *e)
|
||||
{
|
||||
int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
|
||||
int ipv4_encap_size = ETH_HLEN + sizeof(struct iphdr) + VXLAN_HLEN;
|
||||
int ipv4_encap_size = ETH_HLEN +
|
||||
sizeof(struct iphdr) +
|
||||
VXLAN_HLEN;
|
||||
struct ip_tunnel_key *tun_key = &e->tun_info.key;
|
||||
struct net_device *out_dev;
|
||||
struct neighbour *n = NULL;
|
||||
struct flowi4 fl4 = {};
|
||||
u8 nud_state, tos, ttl;
|
||||
char *encap_header;
|
||||
struct ethhdr *eth;
|
||||
u8 nud_state, ttl;
|
||||
struct iphdr *ip;
|
||||
int err;
|
||||
|
||||
if (max_encap_size < ipv4_encap_size) {
|
||||
|
|
@ -2506,22 +2465,11 @@ static int mlx5e_create_encap_header_ipv4(struct mlx5e_priv *priv,
|
|||
if (!encap_header)
|
||||
return -ENOMEM;
|
||||
|
||||
switch (e->tunnel_type) {
|
||||
case MLX5_REFORMAT_TYPE_L2_TO_VXLAN:
|
||||
fl4.flowi4_proto = IPPROTO_UDP;
|
||||
fl4.fl4_dport = tun_key->tp_dst;
|
||||
break;
|
||||
default:
|
||||
err = -EOPNOTSUPP;
|
||||
goto free_encap;
|
||||
}
|
||||
|
||||
tos = tun_key->tos;
|
||||
ttl = tun_key->ttl;
|
||||
|
||||
/* add the IP fields */
|
||||
fl4.flowi4_tos = tun_key->tos;
|
||||
fl4.daddr = tun_key->u.ipv4.dst;
|
||||
fl4.saddr = tun_key->u.ipv4.src;
|
||||
ttl = tun_key->ttl;
|
||||
|
||||
err = mlx5e_route_lookup_ipv4(priv, mirred_dev, &out_dev,
|
||||
&fl4, &n, &ttl);
|
||||
|
|
@ -2536,7 +2484,7 @@ static int mlx5e_create_encap_header_ipv4(struct mlx5e_priv *priv,
|
|||
memcpy(&e->m_neigh.dst_ip, n->primary_key, n->tbl->key_len);
|
||||
e->out_dev = out_dev;
|
||||
|
||||
/* It's importent to add the neigh to the hash table before checking
|
||||
/* It's important to add the neigh to the hash table before checking
|
||||
* the neigh validity state. So if we'll get a notification, in case the
|
||||
* neigh changes it's validity state, we would find the relevant neigh
|
||||
* in the hash.
|
||||
|
|
@ -2550,18 +2498,27 @@ static int mlx5e_create_encap_header_ipv4(struct mlx5e_priv *priv,
|
|||
ether_addr_copy(e->h_dest, n->ha);
|
||||
read_unlock_bh(&n->lock);
|
||||
|
||||
switch (e->tunnel_type) {
|
||||
case MLX5_REFORMAT_TYPE_L2_TO_VXLAN:
|
||||
gen_vxlan_header_ipv4(out_dev, encap_header,
|
||||
ipv4_encap_size, e->h_dest, tos, ttl,
|
||||
fl4.daddr,
|
||||
fl4.saddr, tun_key->tp_dst,
|
||||
tunnel_id_to_key32(tun_key->tun_id));
|
||||
break;
|
||||
default:
|
||||
err = -EOPNOTSUPP;
|
||||
/* add ethernet header */
|
||||
eth = (struct ethhdr *)encap_header;
|
||||
ether_addr_copy(eth->h_dest, e->h_dest);
|
||||
ether_addr_copy(eth->h_source, out_dev->dev_addr);
|
||||
eth->h_proto = htons(ETH_P_IP);
|
||||
|
||||
/* add ip header */
|
||||
ip = (struct iphdr *)((char *)eth + sizeof(struct ethhdr));
|
||||
ip->tos = tun_key->tos;
|
||||
ip->version = 0x4;
|
||||
ip->ihl = 0x5;
|
||||
ip->ttl = ttl;
|
||||
ip->daddr = fl4.daddr;
|
||||
ip->saddr = fl4.saddr;
|
||||
|
||||
/* add tunneling protocol header */
|
||||
err = mlx5e_gen_ip_tunnel_header((char *)ip + sizeof(struct iphdr),
|
||||
&ip->protocol, tun_key);
|
||||
if (err)
|
||||
goto destroy_neigh_entry;
|
||||
}
|
||||
|
||||
e->encap_size = ipv4_encap_size;
|
||||
e->encap_header = encap_header;
|
||||
|
||||
|
|
@ -2598,13 +2555,17 @@ static int mlx5e_create_encap_header_ipv6(struct mlx5e_priv *priv,
|
|||
struct mlx5e_encap_entry *e)
|
||||
{
|
||||
int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
|
||||
int ipv6_encap_size = ETH_HLEN + sizeof(struct ipv6hdr) + VXLAN_HLEN;
|
||||
int ipv6_encap_size = ETH_HLEN +
|
||||
sizeof(struct ipv6hdr) +
|
||||
VXLAN_HLEN;
|
||||
struct ip_tunnel_key *tun_key = &e->tun_info.key;
|
||||
struct net_device *out_dev;
|
||||
struct neighbour *n = NULL;
|
||||
struct flowi6 fl6 = {};
|
||||
u8 nud_state, tos, ttl;
|
||||
struct ipv6hdr *ip6h;
|
||||
char *encap_header;
|
||||
struct ethhdr *eth;
|
||||
u8 nud_state, ttl;
|
||||
int err;
|
||||
|
||||
if (max_encap_size < ipv6_encap_size) {
|
||||
|
|
@ -2617,17 +2578,6 @@ static int mlx5e_create_encap_header_ipv6(struct mlx5e_priv *priv,
|
|||
if (!encap_header)
|
||||
return -ENOMEM;
|
||||
|
||||
switch (e->tunnel_type) {
|
||||
case MLX5_REFORMAT_TYPE_L2_TO_VXLAN:
|
||||
fl6.flowi6_proto = IPPROTO_UDP;
|
||||
fl6.fl6_dport = tun_key->tp_dst;
|
||||
break;
|
||||
default:
|
||||
err = -EOPNOTSUPP;
|
||||
goto free_encap;
|
||||
}
|
||||
|
||||
tos = tun_key->tos;
|
||||
ttl = tun_key->ttl;
|
||||
|
||||
fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tun_key->tos), tun_key->label);
|
||||
|
|
@ -2661,18 +2611,25 @@ static int mlx5e_create_encap_header_ipv6(struct mlx5e_priv *priv,
|
|||
ether_addr_copy(e->h_dest, n->ha);
|
||||
read_unlock_bh(&n->lock);
|
||||
|
||||
switch (e->tunnel_type) {
|
||||
case MLX5_REFORMAT_TYPE_L2_TO_VXLAN:
|
||||
gen_vxlan_header_ipv6(out_dev, encap_header,
|
||||
ipv6_encap_size, e->h_dest, tos, ttl,
|
||||
&fl6.daddr,
|
||||
&fl6.saddr, tun_key->tp_dst,
|
||||
tunnel_id_to_key32(tun_key->tun_id));
|
||||
break;
|
||||
default:
|
||||
err = -EOPNOTSUPP;
|
||||
/* add ethernet header */
|
||||
eth = (struct ethhdr *)encap_header;
|
||||
ether_addr_copy(eth->h_dest, e->h_dest);
|
||||
ether_addr_copy(eth->h_source, out_dev->dev_addr);
|
||||
eth->h_proto = htons(ETH_P_IPV6);
|
||||
|
||||
/* add ip header */
|
||||
ip6h = (struct ipv6hdr *)((char *)eth + sizeof(struct ethhdr));
|
||||
ip6_flow_hdr(ip6h, tun_key->tos, 0);
|
||||
/* the HW fills up ipv6 payload len */
|
||||
ip6h->hop_limit = ttl;
|
||||
ip6h->daddr = fl6.daddr;
|
||||
ip6h->saddr = fl6.saddr;
|
||||
|
||||
/* add tunneling protocol header */
|
||||
err = mlx5e_gen_ip_tunnel_header((char *)ip6h + sizeof(struct ipv6hdr),
|
||||
&ip6h->nexthdr, tun_key);
|
||||
if (err)
|
||||
goto destroy_neigh_entry;
|
||||
}
|
||||
|
||||
e->encap_size = ipv6_encap_size;
|
||||
e->encap_header = encap_header;
|
||||
|
|
@ -2731,17 +2688,11 @@ static int mlx5e_attach_encap(struct mlx5e_priv *priv,
|
|||
uintptr_t hash_key;
|
||||
bool found = false;
|
||||
|
||||
/* udp dst port must be set */
|
||||
if (!memchr_inv(&key->tp_dst, 0, sizeof(key->tp_dst)))
|
||||
goto vxlan_encap_offload_err;
|
||||
|
||||
/* setting udp src port isn't supported */
|
||||
if (memchr_inv(&key->tp_src, 0, sizeof(key->tp_src))) {
|
||||
vxlan_encap_offload_err:
|
||||
if (!MLX5_CAP_ESW(priv->mdev, vxlan_encap_decap)) {
|
||||
NL_SET_ERR_MSG_MOD(extack,
|
||||
"must set udp dst port and not set udp src port");
|
||||
"vxlan HW offloading is not supported");
|
||||
netdev_warn(priv->netdev,
|
||||
"must set udp dst port and not set udp src port\n");
|
||||
"vxlan HW offloading is not supported\n");
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue