From fe881ef11cf0220f118816181930494d484c4883 Mon Sep 17 00:00:00 2001 From: Tom Herbert Date: Tue, 10 Feb 2015 16:30:33 -0800 Subject: gue: Use checksum partial with remote checksum offload Change remote checksum handling to set checksum partial as default behavior. Added an iflink parameter to configure not using checksum partial (calling csum_partial to update checksum). Signed-off-by: Tom Herbert Signed-off-by: David S. Miller --- net/ipv4/fou.c | 28 ++++++++++++++++++++++------ 1 file changed, 22 insertions(+), 6 deletions(-) (limited to 'net') diff --git a/net/ipv4/fou.c b/net/ipv4/fou.c index d320f575cc62..ff069f6597ac 100644 --- a/net/ipv4/fou.c +++ b/net/ipv4/fou.c @@ -22,14 +22,18 @@ static LIST_HEAD(fou_list); struct fou { struct socket *sock; u8 protocol; + u8 flags; u16 port; struct udp_offload udp_offloads; struct list_head list; }; +#define FOU_F_REMCSUM_NOPARTIAL BIT(0) + struct fou_cfg { u16 type; u8 protocol; + u8 flags; struct udp_port_cfg udp_config; }; @@ -64,7 +68,8 @@ static int fou_udp_recv(struct sock *sk, struct sk_buff *skb) } static struct guehdr *gue_remcsum(struct sk_buff *skb, struct guehdr *guehdr, - void *data, size_t hdrlen, u8 ipproto) + void *data, size_t hdrlen, u8 ipproto, + bool nopartial) { __be16 *pd = data; size_t start = ntohs(pd[0]); @@ -75,7 +80,8 @@ static struct guehdr *gue_remcsum(struct sk_buff *skb, struct guehdr *guehdr, return NULL; guehdr = (struct guehdr *)&udp_hdr(skb)[1]; - skb_remcsum_process(skb, (void *)guehdr + hdrlen, start, offset, true); + skb_remcsum_process(skb, (void *)guehdr + hdrlen, + start, offset, nopartial); return guehdr; } @@ -136,7 +142,9 @@ static int gue_udp_recv(struct sock *sk, struct sk_buff *skb) if (flags & GUE_PFLAG_REMCSUM) { guehdr = gue_remcsum(skb, guehdr, data + doffset, - hdrlen, guehdr->proto_ctype); + hdrlen, guehdr->proto_ctype, + !!(fou->flags & + FOU_F_REMCSUM_NOPARTIAL)); if (!guehdr) goto drop; @@ -209,7 +217,7 @@ out_unlock: static struct guehdr *gue_gro_remcsum(struct sk_buff *skb, unsigned int off, struct guehdr *guehdr, void *data, size_t hdrlen, u8 ipproto, - struct gro_remcsum *grc) + struct gro_remcsum *grc, bool nopartial) { __be16 *pd = data; size_t start = ntohs(pd[0]); @@ -230,7 +238,7 @@ static struct guehdr *gue_gro_remcsum(struct sk_buff *skb, unsigned int off, } skb_gro_remcsum_process(skb, (void *)guehdr + hdrlen, - start, offset, grc, true); + start, offset, grc, nopartial); skb->remcsum_offload = 1; @@ -250,6 +258,7 @@ static struct sk_buff **gue_gro_receive(struct sk_buff **head, void *data; u16 doffset = 0; int flush = 1; + struct fou *fou = container_of(uoff, struct fou, udp_offloads); struct gro_remcsum grc; skb_gro_remcsum_init(&grc); @@ -294,7 +303,9 @@ static struct sk_buff **gue_gro_receive(struct sk_buff **head, if (flags & GUE_PFLAG_REMCSUM) { guehdr = gue_gro_remcsum(skb, off, guehdr, data + doffset, hdrlen, - guehdr->proto_ctype, &grc); + guehdr->proto_ctype, &grc, + !!(fou->flags & + FOU_F_REMCSUM_NOPARTIAL)); if (!guehdr) goto out; @@ -455,6 +466,7 @@ static int fou_create(struct net *net, struct fou_cfg *cfg, sk = sock->sk; + fou->flags = cfg->flags; fou->port = cfg->udp_config.local_udp_port; /* Initial for fou type */ @@ -541,6 +553,7 @@ static struct nla_policy fou_nl_policy[FOU_ATTR_MAX + 1] = { [FOU_ATTR_AF] = { .type = NLA_U8, }, [FOU_ATTR_IPPROTO] = { .type = NLA_U8, }, [FOU_ATTR_TYPE] = { .type = NLA_U8, }, + [FOU_ATTR_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG, }, }; static int parse_nl_config(struct genl_info *info, @@ -571,6 +584,9 @@ static int parse_nl_config(struct genl_info *info, if (info->attrs[FOU_ATTR_TYPE]) cfg->type = nla_get_u8(info->attrs[FOU_ATTR_TYPE]); + if (info->attrs[FOU_ATTR_REMCSUM_NOPARTIAL]) + cfg->flags |= FOU_F_REMCSUM_NOPARTIAL; + return 0; } -- cgit v1.2.3