Commit 2bdea157 authored by David S. Miller's avatar David S. Miller

Merge branch 'sctp-fully-support-for-dscp-and-flowlabel-per-transport'

Xin Long says:

====================
sctp: fully support for dscp and flowlabel per transport

Now dscp and flowlabel are set from sock when sending the packets,
but being multi-homing, sctp also supports for dscp and flowlabel
per transport, which is described in section 8.1.12 in RFC6458.

v1->v2:
  - define ip_queue_xmit as inline in net/ip.h, instead of exporting
    it in Patch 1/5 according to David's suggestion.
  - fix the param len check in sctp_s/getsockopt_peer_addr_params()
    in Patch 3/5 to guarantee that an old app built with old kernel
    headers could work on the newer kernel per Marcelo's point.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 05bd97fc 0999f021
...@@ -801,4 +801,11 @@ struct sctp_strreset_resptsn { ...@@ -801,4 +801,11 @@ struct sctp_strreset_resptsn {
__be32 receivers_next_tsn; __be32 receivers_next_tsn;
}; };
enum {
SCTP_DSCP_SET_MASK = 0x1,
SCTP_DSCP_VAL_MASK = 0xfc,
SCTP_FLOWLABEL_SET_MASK = 0x100000,
SCTP_FLOWLABEL_VAL_MASK = 0xfffff
};
#endif /* __LINUX_SCTP_H__ */ #endif /* __LINUX_SCTP_H__ */
...@@ -148,7 +148,8 @@ void ip_send_check(struct iphdr *ip); ...@@ -148,7 +148,8 @@ void ip_send_check(struct iphdr *ip);
int __ip_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); int __ip_local_out(struct net *net, struct sock *sk, struct sk_buff *skb);
int ip_local_out(struct net *net, struct sock *sk, struct sk_buff *skb); int ip_local_out(struct net *net, struct sock *sk, struct sk_buff *skb);
int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl); int __ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
__u8 tos);
void ip_init(void); void ip_init(void);
int ip_append_data(struct sock *sk, struct flowi4 *fl4, int ip_append_data(struct sock *sk, struct flowi4 *fl4,
int getfrag(void *from, char *to, int offset, int len, int getfrag(void *from, char *to, int offset, int len,
...@@ -174,6 +175,12 @@ struct sk_buff *ip_make_skb(struct sock *sk, struct flowi4 *fl4, ...@@ -174,6 +175,12 @@ struct sk_buff *ip_make_skb(struct sock *sk, struct flowi4 *fl4,
struct ipcm_cookie *ipc, struct rtable **rtp, struct ipcm_cookie *ipc, struct rtable **rtp,
struct inet_cork *cork, unsigned int flags); struct inet_cork *cork, unsigned int flags);
static inline int ip_queue_xmit(struct sock *sk, struct sk_buff *skb,
struct flowi *fl)
{
return __ip_queue_xmit(sk, skb, fl, inet_sk(sk)->tos);
}
static inline struct sk_buff *ip_finish_skb(struct sock *sk, struct flowi4 *fl4) static inline struct sk_buff *ip_finish_skb(struct sock *sk, struct flowi4 *fl4)
{ {
return __ip_make_skb(sk, fl4, &sk->sk_write_queue, &inet_sk(sk)->cork.base); return __ip_make_skb(sk, fl4, &sk->sk_write_queue, &inet_sk(sk)->cork.base);
......
...@@ -193,6 +193,9 @@ struct sctp_sock { ...@@ -193,6 +193,9 @@ struct sctp_sock {
/* This is the max_retrans value for new associations. */ /* This is the max_retrans value for new associations. */
__u16 pathmaxrxt; __u16 pathmaxrxt;
__u32 flowlabel;
__u8 dscp;
/* The initial Path MTU to use for new associations. */ /* The initial Path MTU to use for new associations. */
__u32 pathmtu; __u32 pathmtu;
...@@ -895,6 +898,9 @@ struct sctp_transport { ...@@ -895,6 +898,9 @@ struct sctp_transport {
*/ */
__u16 pathmaxrxt; __u16 pathmaxrxt;
__u32 flowlabel;
__u8 dscp;
/* This is the partially failed retrans value for the transport /* This is the partially failed retrans value for the transport
* and will be initialized from the assocs value. This can be changed * and will be initialized from the assocs value. This can be changed
* using the SCTP_PEER_ADDR_THLDS socket option * using the SCTP_PEER_ADDR_THLDS socket option
...@@ -1772,6 +1778,9 @@ struct sctp_association { ...@@ -1772,6 +1778,9 @@ struct sctp_association {
*/ */
__u16 pathmaxrxt; __u16 pathmaxrxt;
__u32 flowlabel;
__u8 dscp;
/* Flag that path mtu update is pending */ /* Flag that path mtu update is pending */
__u8 pmtu_pending; __u8 pmtu_pending;
......
...@@ -763,6 +763,8 @@ enum sctp_spp_flags { ...@@ -763,6 +763,8 @@ enum sctp_spp_flags {
SPP_SACKDELAY_DISABLE = 1<<6, /*Disable SACK*/ SPP_SACKDELAY_DISABLE = 1<<6, /*Disable SACK*/
SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE, SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE,
SPP_HB_TIME_IS_ZERO = 1<<7, /* Set HB delay to 0 */ SPP_HB_TIME_IS_ZERO = 1<<7, /* Set HB delay to 0 */
SPP_IPV6_FLOWLABEL = 1<<8,
SPP_DSCP = 1<<9,
}; };
struct sctp_paddrparams { struct sctp_paddrparams {
...@@ -773,6 +775,8 @@ struct sctp_paddrparams { ...@@ -773,6 +775,8 @@ struct sctp_paddrparams {
__u32 spp_pathmtu; __u32 spp_pathmtu;
__u32 spp_sackdelay; __u32 spp_sackdelay;
__u32 spp_flags; __u32 spp_flags;
__u32 spp_ipv6_flowlabel;
__u8 spp_dscp;
} __attribute__((packed, aligned(4))); } __attribute__((packed, aligned(4)));
/* /*
......
...@@ -423,7 +423,8 @@ static void ip_copy_addrs(struct iphdr *iph, const struct flowi4 *fl4) ...@@ -423,7 +423,8 @@ static void ip_copy_addrs(struct iphdr *iph, const struct flowi4 *fl4)
} }
/* Note: skb->sk can be different from sk, in case of tunnels */ /* Note: skb->sk can be different from sk, in case of tunnels */
int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl) int __ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
__u8 tos)
{ {
struct inet_sock *inet = inet_sk(sk); struct inet_sock *inet = inet_sk(sk);
struct net *net = sock_net(sk); struct net *net = sock_net(sk);
...@@ -462,7 +463,7 @@ int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl) ...@@ -462,7 +463,7 @@ int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl)
inet->inet_dport, inet->inet_dport,
inet->inet_sport, inet->inet_sport,
sk->sk_protocol, sk->sk_protocol,
RT_CONN_FLAGS(sk), RT_CONN_FLAGS_TOS(sk, tos),
sk->sk_bound_dev_if); sk->sk_bound_dev_if);
if (IS_ERR(rt)) if (IS_ERR(rt))
goto no_route; goto no_route;
...@@ -478,7 +479,7 @@ int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl) ...@@ -478,7 +479,7 @@ int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl)
skb_push(skb, sizeof(struct iphdr) + (inet_opt ? inet_opt->opt.optlen : 0)); skb_push(skb, sizeof(struct iphdr) + (inet_opt ? inet_opt->opt.optlen : 0));
skb_reset_network_header(skb); skb_reset_network_header(skb);
iph = ip_hdr(skb); iph = ip_hdr(skb);
*((__be16 *)iph) = htons((4 << 12) | (5 << 8) | (inet->tos & 0xff)); *((__be16 *)iph) = htons((4 << 12) | (5 << 8) | (tos & 0xff));
if (ip_dont_fragment(sk, &rt->dst) && !skb->ignore_df) if (ip_dont_fragment(sk, &rt->dst) && !skb->ignore_df)
iph->frag_off = htons(IP_DF); iph->frag_off = htons(IP_DF);
else else
...@@ -511,7 +512,7 @@ int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl) ...@@ -511,7 +512,7 @@ int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl)
kfree_skb(skb); kfree_skb(skb);
return -EHOSTUNREACH; return -EHOSTUNREACH;
} }
EXPORT_SYMBOL(ip_queue_xmit); EXPORT_SYMBOL(__ip_queue_xmit);
static void ip_copy_metadata(struct sk_buff *to, struct sk_buff *from) static void ip_copy_metadata(struct sk_buff *to, struct sk_buff *from)
{ {
......
...@@ -115,6 +115,9 @@ static struct sctp_association *sctp_association_init( ...@@ -115,6 +115,9 @@ static struct sctp_association *sctp_association_init(
/* Initialize path max retrans value. */ /* Initialize path max retrans value. */
asoc->pathmaxrxt = sp->pathmaxrxt; asoc->pathmaxrxt = sp->pathmaxrxt;
asoc->flowlabel = sp->flowlabel;
asoc->dscp = sp->dscp;
/* Initialize default path MTU. */ /* Initialize default path MTU. */
asoc->pathmtu = sp->pathmtu; asoc->pathmtu = sp->pathmtu;
...@@ -647,6 +650,18 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc, ...@@ -647,6 +650,18 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc,
peer->sackdelay = asoc->sackdelay; peer->sackdelay = asoc->sackdelay;
peer->sackfreq = asoc->sackfreq; peer->sackfreq = asoc->sackfreq;
if (addr->sa.sa_family == AF_INET6) {
__be32 info = addr->v6.sin6_flowinfo;
if (info) {
peer->flowlabel = ntohl(info & IPV6_FLOWLABEL_MASK);
peer->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
} else {
peer->flowlabel = asoc->flowlabel;
}
}
peer->dscp = asoc->dscp;
/* Enable/disable heartbeat, SACK delay, and path MTU discovery /* Enable/disable heartbeat, SACK delay, and path MTU discovery
* based on association setting. * based on association setting.
*/ */
......
...@@ -209,11 +209,16 @@ static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport) ...@@ -209,11 +209,16 @@ static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport)
struct sock *sk = skb->sk; struct sock *sk = skb->sk;
struct ipv6_pinfo *np = inet6_sk(sk); struct ipv6_pinfo *np = inet6_sk(sk);
struct flowi6 *fl6 = &transport->fl.u.ip6; struct flowi6 *fl6 = &transport->fl.u.ip6;
__u8 tclass = np->tclass;
int res; int res;
pr_debug("%s: skb:%p, len:%d, src:%pI6 dst:%pI6\n", __func__, skb, pr_debug("%s: skb:%p, len:%d, src:%pI6 dst:%pI6\n", __func__, skb,
skb->len, &fl6->saddr, &fl6->daddr); skb->len, &fl6->saddr, &fl6->daddr);
if (transport->dscp & SCTP_DSCP_SET_MASK)
tclass = transport->dscp & SCTP_DSCP_VAL_MASK;
if (INET_ECN_is_capable(tclass))
IP6_ECN_flow_xmit(sk, fl6->flowlabel); IP6_ECN_flow_xmit(sk, fl6->flowlabel);
if (!(transport->param_flags & SPP_PMTUD_ENABLE)) if (!(transport->param_flags & SPP_PMTUD_ENABLE))
...@@ -223,7 +228,7 @@ static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport) ...@@ -223,7 +228,7 @@ static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport)
rcu_read_lock(); rcu_read_lock();
res = ip6_xmit(sk, skb, fl6, sk->sk_mark, rcu_dereference(np->opt), res = ip6_xmit(sk, skb, fl6, sk->sk_mark, rcu_dereference(np->opt),
np->tclass); tclass);
rcu_read_unlock(); rcu_read_unlock();
return res; return res;
} }
...@@ -254,6 +259,17 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr, ...@@ -254,6 +259,17 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
fl6->flowi6_oif = daddr->v6.sin6_scope_id; fl6->flowi6_oif = daddr->v6.sin6_scope_id;
else if (asoc) else if (asoc)
fl6->flowi6_oif = asoc->base.sk->sk_bound_dev_if; fl6->flowi6_oif = asoc->base.sk->sk_bound_dev_if;
if (t->flowlabel & SCTP_FLOWLABEL_SET_MASK)
fl6->flowlabel = htonl(t->flowlabel & SCTP_FLOWLABEL_VAL_MASK);
if (np->sndflow && (fl6->flowlabel & IPV6_FLOWLABEL_MASK)) {
struct ip6_flowlabel *flowlabel;
flowlabel = fl6_sock_lookup(sk, fl6->flowlabel);
if (!flowlabel)
goto out;
fl6_sock_release(flowlabel);
}
pr_debug("%s: dst=%pI6 ", __func__, &fl6->daddr); pr_debug("%s: dst=%pI6 ", __func__, &fl6->daddr);
......
...@@ -426,13 +426,16 @@ static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr, ...@@ -426,13 +426,16 @@ static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
struct dst_entry *dst = NULL; struct dst_entry *dst = NULL;
union sctp_addr *daddr = &t->ipaddr; union sctp_addr *daddr = &t->ipaddr;
union sctp_addr dst_saddr; union sctp_addr dst_saddr;
__u8 tos = inet_sk(sk)->tos;
if (t->dscp & SCTP_DSCP_SET_MASK)
tos = t->dscp & SCTP_DSCP_VAL_MASK;
memset(fl4, 0x0, sizeof(struct flowi4)); memset(fl4, 0x0, sizeof(struct flowi4));
fl4->daddr = daddr->v4.sin_addr.s_addr; fl4->daddr = daddr->v4.sin_addr.s_addr;
fl4->fl4_dport = daddr->v4.sin_port; fl4->fl4_dport = daddr->v4.sin_port;
fl4->flowi4_proto = IPPROTO_SCTP; fl4->flowi4_proto = IPPROTO_SCTP;
if (asoc) { if (asoc) {
fl4->flowi4_tos = RT_CONN_FLAGS(asoc->base.sk); fl4->flowi4_tos = RT_CONN_FLAGS_TOS(asoc->base.sk, tos);
fl4->flowi4_oif = asoc->base.sk->sk_bound_dev_if; fl4->flowi4_oif = asoc->base.sk->sk_bound_dev_if;
fl4->fl4_sport = htons(asoc->base.bind_addr.port); fl4->fl4_sport = htons(asoc->base.bind_addr.port);
} }
...@@ -495,7 +498,7 @@ static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr, ...@@ -495,7 +498,7 @@ static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
fl4->fl4_sport = laddr->a.v4.sin_port; fl4->fl4_sport = laddr->a.v4.sin_port;
flowi4_update_output(fl4, flowi4_update_output(fl4,
asoc->base.sk->sk_bound_dev_if, asoc->base.sk->sk_bound_dev_if,
RT_CONN_FLAGS(asoc->base.sk), RT_CONN_FLAGS_TOS(asoc->base.sk, tos),
daddr->v4.sin_addr.s_addr, daddr->v4.sin_addr.s_addr,
laddr->a.v4.sin_addr.s_addr); laddr->a.v4.sin_addr.s_addr);
...@@ -971,16 +974,21 @@ static inline int sctp_v4_xmit(struct sk_buff *skb, ...@@ -971,16 +974,21 @@ static inline int sctp_v4_xmit(struct sk_buff *skb,
struct sctp_transport *transport) struct sctp_transport *transport)
{ {
struct inet_sock *inet = inet_sk(skb->sk); struct inet_sock *inet = inet_sk(skb->sk);
__u8 dscp = inet->tos;
pr_debug("%s: skb:%p, len:%d, src:%pI4, dst:%pI4\n", __func__, skb, pr_debug("%s: skb:%p, len:%d, src:%pI4, dst:%pI4\n", __func__, skb,
skb->len, &transport->fl.u.ip4.saddr, &transport->fl.u.ip4.daddr); skb->len, &transport->fl.u.ip4.saddr,
&transport->fl.u.ip4.daddr);
if (transport->dscp & SCTP_DSCP_SET_MASK)
dscp = transport->dscp & SCTP_DSCP_VAL_MASK;
inet->pmtudisc = transport->param_flags & SPP_PMTUD_ENABLE ? inet->pmtudisc = transport->param_flags & SPP_PMTUD_ENABLE ?
IP_PMTUDISC_DO : IP_PMTUDISC_DONT; IP_PMTUDISC_DO : IP_PMTUDISC_DONT;
SCTP_INC_STATS(sock_net(&inet->sk), SCTP_MIB_OUTSCTPPACKS); SCTP_INC_STATS(sock_net(&inet->sk), SCTP_MIB_OUTSCTPPACKS);
return ip_queue_xmit(&inet->sk, skb, &transport->fl); return __ip_queue_xmit(&inet->sk, skb, &transport->fl, dscp);
} }
static struct sctp_af sctp_af_inet; static struct sctp_af sctp_af_inet;
......
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