diff options
Diffstat (limited to 'include/net/gro.h')
-rw-r--r-- | include/net/gro.h | 92 |
1 files changed, 50 insertions, 42 deletions
diff --git a/include/net/gro.h b/include/net/gro.h index 8f75802d50fd..a4fab706240d 100644 --- a/include/net/gro.h +++ b/include/net/gro.h @@ -29,46 +29,51 @@ struct napi_gro_cb { /* Number of segments aggregated. */ u16 count; - /* Start offset for remote checksum offload */ - u16 gro_remcsum_start; + /* Used in ipv6_gro_receive() and foo-over-udp */ + u16 proto; /* jiffies when first packet was created/queued */ unsigned long age; - /* Used in ipv6_gro_receive() and foo-over-udp */ - u16 proto; +/* Used in napi_gro_cb::free */ +#define NAPI_GRO_FREE 1 +#define NAPI_GRO_FREE_STOLEN_HEAD 2 + /* portion of the cb set to zero at every gro iteration */ + struct_group(zeroed, - /* This is non-zero if the packet may be of the same flow. */ - u8 same_flow:1; + /* Start offset for remote checksum offload */ + u16 gro_remcsum_start; - /* Used in tunnel GRO receive */ - u8 encap_mark:1; + /* This is non-zero if the packet may be of the same flow. */ + u8 same_flow:1; - /* GRO checksum is valid */ - u8 csum_valid:1; + /* Used in tunnel GRO receive */ + u8 encap_mark:1; - /* Number of checksums via CHECKSUM_UNNECESSARY */ - u8 csum_cnt:3; + /* GRO checksum is valid */ + u8 csum_valid:1; - /* Free the skb? */ - u8 free:2; -#define NAPI_GRO_FREE 1 -#define NAPI_GRO_FREE_STOLEN_HEAD 2 + /* Number of checksums via CHECKSUM_UNNECESSARY */ + u8 csum_cnt:3; + + /* Free the skb? */ + u8 free:2; - /* Used in foo-over-udp, set in udp[46]_gro_receive */ - u8 is_ipv6:1; + /* Used in foo-over-udp, set in udp[46]_gro_receive */ + u8 is_ipv6:1; - /* Used in GRE, set in fou/gue_gro_receive */ - u8 is_fou:1; + /* Used in GRE, set in fou/gue_gro_receive */ + u8 is_fou:1; - /* Used to determine if flush_id can be ignored */ - u8 is_atomic:1; + /* Used to determine if flush_id can be ignored */ + u8 is_atomic:1; - /* Number of gro_receive callbacks this packet already went through */ - u8 recursion_counter:4; + /* Number of gro_receive callbacks this packet already went through */ + u8 recursion_counter:4; - /* GRO is done by frag_list pointer chaining. */ - u8 is_flist:1; + /* GRO is done by frag_list pointer chaining. */ + u8 is_flist:1; + ); /* used to support CHECKSUM_COMPLETE for tunneling protocols */ __wsum csum; @@ -155,6 +160,17 @@ static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, return skb->data + offset; } +static inline void *skb_gro_header(struct sk_buff *skb, + unsigned int hlen, unsigned int offset) +{ + void *ptr; + + ptr = skb_gro_header_fast(skb, offset); + if (skb_gro_header_hard(skb, hlen)) + ptr = skb_gro_header_slow(skb, hlen, offset); + return ptr; +} + static inline void *skb_gro_network_header(struct sk_buff *skb) { return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + @@ -296,12 +312,9 @@ static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr, return ptr; } - ptr = skb_gro_header_fast(skb, off); - if (skb_gro_header_hard(skb, off + plen)) { - ptr = skb_gro_header_slow(skb, off + plen, off); - if (!ptr) - return NULL; - } + ptr = skb_gro_header(skb, off + plen, off); + if (!ptr) + return NULL; delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum, start, offset); @@ -324,12 +337,9 @@ static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb, if (!grc->delta) return; - ptr = skb_gro_header_fast(skb, grc->offset); - if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) { - ptr = skb_gro_header_slow(skb, plen, grc->offset); - if (!ptr) - return; - } + ptr = skb_gro_header(skb, plen, grc->offset); + if (!ptr) + return; remcsum_unadjust((__sum16 *)ptr, grc->delta); } @@ -400,9 +410,7 @@ static inline struct udphdr *udp_gro_udphdr(struct sk_buff *skb) off = skb_gro_offset(skb); hlen = off + sizeof(*uh); - uh = skb_gro_header_fast(skb, off); - if (skb_gro_header_hard(skb, hlen)) - uh = skb_gro_header_slow(skb, hlen, off); + uh = skb_gro_header(skb, hlen, off); return uh; } @@ -434,7 +442,7 @@ static inline void gro_normal_one(struct napi_struct *napi, struct sk_buff *skb, { list_add_tail(&skb->list, &napi->rx_list); napi->rx_count += segs; - if (napi->rx_count >= gro_normal_batch) + if (napi->rx_count >= READ_ONCE(gro_normal_batch)) gro_normal_list(napi); } |