AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

openvswitch: Derive IP protocol number for IPv6 later frags

Browse Source 
Currently, OVS only parses the IP protocol number for the first
IPv6 fragment, but sets the IP protocol number for the later fragments
to be NEXTHDF_FRAGMENT.  This patch tries to derive the IP protocol
number for the IPV6 later frags so that we can match that.

Signed-off-by: Yi-Hung Wei <yihung.wei@gmail.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yi-Hung Wei 2018-09-04 15:33:41 -07:00 committed by David S. Miller
parent ddc4d236dc
commit fa642f0883
1 changed files with 9 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
net/openvswitch/flow.c
View File

@ -254,21 +254,18 @@ static bool icmphdr_ok(struct sk_buff *skb)
static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key) static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
{ {
unsigned short frag_off;
unsigned int payload_ofs = 0;
unsigned int nh_ofs = skb_network_offset(skb); unsigned int nh_ofs = skb_network_offset(skb);
unsigned int nh_len; unsigned int nh_len;
int payload_ofs;
struct ipv6hdr *nh; struct ipv6hdr *nh;
uint8_t nexthdr; int err, nexthdr, flags = 0;
__be16 frag_off;
int err;
err = check_header(skb, nh_ofs + sizeof(*nh)); err = check_header(skb, nh_ofs + sizeof(*nh));
if (unlikely(err)) if (unlikely(err))
return err; return err;
nh = ipv6_hdr(skb); nh = ipv6_hdr(skb);
nexthdr = nh->nexthdr;
payload_ofs = (u8 *)(nh + 1) - skb->data;
key->ip.proto = NEXTHDR_NONE; key->ip.proto = NEXTHDR_NONE;
key->ip.tos = ipv6_get_dsfield(nh); key->ip.tos = ipv6_get_dsfield(nh);
@ -277,10 +274,9 @@ static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
key->ipv6.addr.src = nh->saddr; key->ipv6.addr.src = nh->saddr;
key->ipv6.addr.dst = nh->daddr; key->ipv6.addr.dst = nh->daddr;
payload_ofs = ipv6_skip_exthdr(skb, payload_ofs, &nexthdr, &frag_off); nexthdr = ipv6_find_hdr(skb, &payload_ofs, -1, &frag_off, &flags);
if (flags & IP6_FH_F_FRAG) {
if (frag_off) { if (frag_off)
if (frag_off & htons(~0x7))
key->ip.frag = OVS_FRAG_TYPE_LATER; key->ip.frag = OVS_FRAG_TYPE_LATER;
else else
key->ip.frag = OVS_FRAG_TYPE_FIRST; key->ip.frag = OVS_FRAG_TYPE_FIRST;
@ -288,11 +284,11 @@ static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
key->ip.frag = OVS_FRAG_TYPE_NONE; key->ip.frag = OVS_FRAG_TYPE_NONE;
} }
/* Delayed handling of error in ipv6_skip_exthdr() as it /* Delayed handling of error in ipv6_find_hdr() as it
* always sets frag_off to a valid value which may be * always sets flags and frag_off to a valid value which may be
* used to set key->ip.frag above. * used to set key->ip.frag above.
*/ */
if (unlikely(payload_ofs < 0)) if (unlikely(nexthdr < 0))
return -EPROTO; return -EPROTO;
nh_len = payload_ofs - nh_ofs; nh_len = payload_ofs - nh_ofs;