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[IP_SOCKGLUE]: Remove most of the tcp specific calls 

As DCCP needs to be called in the same spots.

Now we have a member in inet_sock (is_icsk), set at sock creation time from
struct inet_protosw->flags (if INET_PROTOSW_ICSK is set, like for TCP and
DCCP) to see if a struct sock instance is a inet_connection_sock for places
like the ones in ip_sockglue.c (v4 and v6) where we previously were looking if
sk_type was SOCK_STREAM, that is insufficient because we now use the same code
for DCCP, that has sk_type SOCK_DCCP.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo 2005-12-13 23:26:10 -08:00 committed by David S. Miller
parent 2271281362
commit d83d8461f9
20 changed files with 97 additions and 83 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/dccp.h
View File

@ -408,8 +408,6 @@ struct dccp_ackvec;
* @dccps_gar - greatest valid ack number received on a non-Sync; initialized to %dccps_iss
* @dccps_timestamp_time - time of latest TIMESTAMP option
* @dccps_timestamp_echo - latest timestamp received on a TIMESTAMP option
* @dccps_ext_header_len - network protocol overhead (IP/IPv6 options)
* @dccps_pmtu_cookie - Last pmtu seen by socket
* @dccps_packet_size - Set thru setsockopt
* @dccps_role - Role of this sock, one of %dccp_role
* @dccps_ndp_count - number of Non Data Packets since last data packet
@ -434,8 +432,6 @@ struct dccp_sock {
__u32 dccps_timestamp_echo;
__u32 dccps_packet_size;
unsigned long dccps_ndp_count;
__u16 dccps_ext_header_len;
__u32 dccps_pmtu_cookie;
__u32 dccps_mss_cache;
struct dccp_options dccps_options;
struct dccp_ackvec *dccps_hc_rx_ackvec;

1
include/linux/ip.h
View File

@ -155,6 +155,7 @@ struct inet_sock {
__u8 mc_ttl; /* Multicasting TTL */
__u8 pmtudisc;
unsigned recverr : 1,
is_icsk : 1, /* inet_connection_sock? */
freebind : 1,
hdrincl : 1,
mc_loop : 1;

3
include/linux/tcp.h
View File

@ -238,10 +238,9 @@ struct tcp_sock {
__u32 snd_wl1; /* Sequence for window update */
__u32 snd_wnd; /* The window we expect to receive */
__u32 max_window; /* Maximal window ever seen from peer */
__u32 pmtu_cookie; /* Last pmtu seen by socket */
__u32 mss_cache; /* Cached effective mss, not including SACKS */
__u16 xmit_size_goal; /* Goal for segmenting output packets */
__u16 ext_header_len; /* Network protocol overhead (IP/IPv6 options) */
/* XXX Two bytes hole, try to pack */
__u32 window_clamp; /* Maximal window to advertise */
__u32 rcv_ssthresh; /* Current window clamp */

6
include/net/inet_connection_sock.h
View File

@ -60,6 +60,7 @@ struct inet_connection_sock_af_ops {
* @icsk_timeout: Timeout
* @icsk_retransmit_timer: Resend (no ack)
* @icsk_rto: Retransmit timeout
* @icsk_pmtu_cookie Last pmtu seen by socket
* @icsk_ca_ops Pluggable congestion control hook
* @icsk_af_ops Operations which are AF_INET{4,6} specific
* @icsk_ca_state: Congestion control state
@ -68,6 +69,7 @@ struct inet_connection_sock_af_ops {
* @icsk_backoff: Backoff
* @icsk_syn_retries: Number of allowed SYN (or equivalent) retries
* @icsk_probes_out: unanswered 0 window probes
* @icsk_ext_hdr_len: Network protocol overhead (IP/IPv6 options)
* @icsk_ack: Delayed ACK control data
*/
struct inet_connection_sock {
@ -79,15 +81,17 @@ struct inet_connection_sock {
struct timer_list icsk_retransmit_timer;
struct timer_list icsk_delack_timer;
__u32 icsk_rto;
__u32 icsk_pmtu_cookie;
struct tcp_congestion_ops *icsk_ca_ops;
struct inet_connection_sock_af_ops *icsk_af_ops;
unsigned int (*icsk_sync_mss)(struct sock *sk, u32 pmtu);
__u8 icsk_ca_state;
__u8 icsk_retransmits;
__u8 icsk_pending;
__u8 icsk_backoff;
__u8 icsk_syn_retries;
__u8 icsk_probes_out;
/* 2 BYTES HOLE, TRY TO PACK! */
__u16 icsk_ext_hdr_len;
struct {
__u8 pending; /* ACK is pending */
__u8 quick; /* Scheduled number of quick acks */

1
include/net/protocol.h
View File

@ -76,6 +76,7 @@ struct inet_protosw {
};
#define INET_PROTOSW_REUSE 0x01 /* Are ports automatically reusable? */
#define INET_PROTOSW_PERMANENT 0x02 /* Permanent protocols are unremovable. */
#define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */
extern struct net_protocol *inet_protocol_base;
extern struct net_protocol *inet_protos[MAX_INET_PROTOS];

2
net/dccp/diag.c
View File

@ -28,7 +28,7 @@ static void dccp_get_info(struct sock *sk, struct tcp_info *info)
info->tcpi_retransmits = icsk->icsk_retransmits;
info->tcpi_probes = icsk->icsk_probes_out;
info->tcpi_backoff = icsk->icsk_backoff;
info->tcpi_pmtu = dp->dccps_pmtu_cookie;
info->tcpi_pmtu = icsk->icsk_pmtu_cookie;
if (dp->dccps_options.dccpo_send_ack_vector)
info->tcpi_options |= TCPI_OPT_SACK;

2
net/dccp/input.c
View File

@ -311,7 +311,7 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
goto out_invalid_packet;
}
dccp_sync_mss(sk, dp->dccps_pmtu_cookie);
dccp_sync_mss(sk, icsk->icsk_pmtu_cookie);
/*
* Step 10: Process REQUEST state (second part)

12
net/dccp/ipv4.c
View File

@ -104,9 +104,9 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
inet->dport = usin->sin_port;
inet->daddr = daddr;
dp->dccps_ext_header_len = 0;
inet_csk(sk)->icsk_ext_hdr_len = 0;
if (inet->opt != NULL)
dp->dccps_ext_header_len = inet->opt->optlen;
inet_csk(sk)->icsk_ext_hdr_len = inet->opt->optlen;
/*
* Socket identity is still unknown (sport may be zero).
* However we set state to DCCP_REQUESTING and not releasing socket
@ -191,7 +191,7 @@ static inline void dccp_do_pmtu_discovery(struct sock *sk,
mtu = dst_mtu(dst);
if (inet->pmtudisc != IP_PMTUDISC_DONT &&
dp->dccps_pmtu_cookie > mtu) {
inet_csk(sk)->icsk_pmtu_cookie > mtu) {
dccp_sync_mss(sk, mtu);
/*
@ -1051,6 +1051,7 @@ struct inet_connection_sock_af_ops dccp_ipv4_af_ops = {
int dccp_v4_init_sock(struct sock *sk)
{
struct dccp_sock *dp = dccp_sk(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
static int dccp_ctl_socket_init = 1;
dccp_options_init(&dp->dccps_options);
@ -1090,10 +1091,11 @@ int dccp_v4_init_sock(struct sock *sk)
dccp_ctl_socket_init = 0;
dccp_init_xmit_timers(sk);
inet_csk(sk)->icsk_rto = DCCP_TIMEOUT_INIT;
icsk->icsk_rto = DCCP_TIMEOUT_INIT;
sk->sk_state = DCCP_CLOSED;
sk->sk_write_space = dccp_write_space;
inet_csk(sk)->icsk_af_ops = &dccp_ipv4_af_ops;
icsk->icsk_af_ops = &dccp_ipv4_af_ops;
icsk->icsk_sync_mss = dccp_sync_mss;
dp->dccps_mss_cache = 536;
dp->dccps_role = DCCP_ROLE_UNDEFINED;
dp->dccps_service = DCCP_SERVICE_INVALID_VALUE;

26
net/dccp/ipv6.c
View File

@ -88,6 +88,7 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
int addr_len)
{
struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr;
struct inet_connection_sock *icsk = inet_csk(sk);
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct dccp_sock *dp = dccp_sk(sk);
@ -158,7 +159,7 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
*/
if (addr_type == IPV6_ADDR_MAPPED) {
u32 exthdrlen = dp->dccps_ext_header_len;
u32 exthdrlen = icsk->icsk_ext_hdr_len;
struct sockaddr_in sin;
SOCK_DEBUG(sk, "connect: ipv4 mapped\n");
@ -170,14 +171,14 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
sin.sin_port = usin->sin6_port;
sin.sin_addr.s_addr = usin->sin6_addr.s6_addr32[3];
inet_csk(sk)->icsk_af_ops = &dccp_ipv6_mapped;
icsk->icsk_af_ops = &dccp_ipv6_mapped;
sk->sk_backlog_rcv = dccp_v4_do_rcv;
err = dccp_v4_connect(sk, (struct sockaddr *)&sin, sizeof(sin));
if (err) {
dp->dccps_ext_header_len = exthdrlen;
inet_csk(sk)->icsk_af_ops = &dccp_ipv6_af_ops;
icsk->icsk_ext_hdr_len = exthdrlen;
icsk->icsk_af_ops = &dccp_ipv6_af_ops;
sk->sk_backlog_rcv = dccp_v6_do_rcv;
goto failure;
} else {
@ -227,9 +228,10 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
ip6_dst_store(sk, dst, NULL);
dp->dccps_ext_header_len = 0;
icsk->icsk_ext_hdr_len = 0;
if (np->opt)
dp->dccps_ext_header_len = np->opt->opt_flen + np->opt->opt_nflen;
icsk->icsk_ext_hdr_len = (np->opt->opt_flen +
np->opt->opt_nflen);
inet->dport = usin->sin6_port;
@ -292,7 +294,6 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
np = inet6_sk(sk);
if (type == ICMPV6_PKT_TOOBIG) {
struct dccp_sock *dp = dccp_sk(sk);
struct dst_entry *dst = NULL;
if (sock_owned_by_user(sk))
@ -332,7 +333,7 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
} else
dst_hold(dst);
if (dp->dccps_pmtu_cookie > dst_mtu(dst)) {
if (inet_csk(sk)->icsk_pmtu_cookie > dst_mtu(dst)) {
dccp_sync_mss(sk, dst_mtu(dst));
} /* else let the usual retransmit timer handle it */
dst_release(dst);
@ -808,7 +809,7 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
worked with IPv6 icsk.icsk_af_ops.
Sync it now.
*/
dccp_sync_mss(newsk, newdp->dccps_pmtu_cookie);
dccp_sync_mss(newsk, inet_csk(newsk)->icsk_pmtu_cookie);
return newsk;
}
@ -916,10 +917,10 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
sock_kfree_s(sk, opt, opt->tot_len);
}
newdp->dccps_ext_header_len = 0;
inet_csk(newsk)->icsk_ext_hdr_len = 0;
if (newnp->opt)
newdp->dccps_ext_header_len = newnp->opt->opt_nflen +
newnp->opt->opt_flen;
inet_csk(newsk)->icsk_ext_hdr_len = (newnp->opt->opt_nflen +
newnp->opt->opt_flen);
dccp_sync_mss(newsk, dst_mtu(dst));
@ -1230,6 +1231,7 @@ static struct inet_protosw dccp_v6_protosw = {
.prot = &dccp_v6_prot,
.ops = &inet6_dccp_ops,
.capability = -1,
.flags = INET_PROTOSW_ICSK,
};
static int __init dccp_v6_init(void)

7
net/dccp/output.c
View File

@ -134,12 +134,13 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
unsigned int dccp_sync_mss(struct sock *sk, u32 pmtu)
{
struct inet_connection_sock *icsk = inet_csk(sk);
struct dccp_sock *dp = dccp_sk(sk);
int mss_now = (pmtu - inet_csk(sk)->icsk_af_ops->net_header_len -
int mss_now = (pmtu - icsk->icsk_af_ops->net_header_len -
sizeof(struct dccp_hdr) - sizeof(struct dccp_hdr_ext));
/* Now subtract optional transport overhead */
mss_now -= dp->dccps_ext_header_len;
mss_now -= icsk->icsk_ext_hdr_len;
/*
* FIXME: this should come from the CCID infrastructure, where, say,
@ -152,7 +153,7 @@ unsigned int dccp_sync_mss(struct sock *sk, u32 pmtu)
mss_now -= ((5 + 6 + 10 + 6 + 6 + 6 + 3) / 4) * 4;
/* And store cached results */
dp->dccps_pmtu_cookie = pmtu;
icsk->icsk_pmtu_cookie = pmtu;
dp->dccps_mss_cache = mss_now;
return mss_now;

2
net/dccp/proto.c
View File

@ -712,7 +712,7 @@ static struct inet_protosw dccp_v4_protosw = {
.ops = &inet_dccp_ops,
.capability = -1,
.no_check = 0,
.flags = 0,
.flags = INET_PROTOSW_ICSK,
};
/*

4
net/ipv4/af_inet.c
View File

@ -302,6 +302,7 @@ static int inet_create(struct socket *sock, int protocol)
sk->sk_reuse = 1;
inet = inet_sk(sk);
inet->is_icsk = INET_PROTOSW_ICSK & answer_flags;
if (SOCK_RAW == sock->type) {
inet->num = protocol;
@ -869,7 +870,8 @@ static struct inet_protosw inetsw_array[] =
.ops = &inet_stream_ops,
.capability = -1,
.no_check = 0,
.flags = INET_PROTOSW_PERMANENT,
.flags = INET_PROTOSW_PERMANENT |
INET_PROTOSW_ICSK,
},
{

13
net/ipv4/ip_sockglue.c
View File

@ -29,8 +29,7 @@
#include <net/sock.h>
#include <net/ip.h>
#include <net/icmp.h>
#include <net/tcp.h>
#include <linux/tcp.h>
#include <net/tcp_states.h>
#include <linux/udp.h>
#include <linux/igmp.h>
#include <linux/netfilter.h>
@ -427,8 +426,8 @@ int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
err = ip_options_get_from_user(&opt, optval, optlen);
if (err)
break;
if (sk->sk_type == SOCK_STREAM) {
struct tcp_sock *tp = tcp_sk(sk);
if (inet->is_icsk) {
struct inet_connection_sock *icsk = inet_csk(sk);
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
if (sk->sk_family == PF_INET ||
(!((1 << sk->sk_state) &
@ -436,10 +435,10 @@ int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
inet->daddr != LOOPBACK4_IPV6)) {
#endif
if (inet->opt)
tp->ext_header_len -= inet->opt->optlen;
icsk->icsk_ext_hdr_len -= inet->opt->optlen;
if (opt)
tp->ext_header_len += opt->optlen;
tcp_sync_mss(sk, tp->pmtu_cookie);
icsk->icsk_ext_hdr_len += opt->optlen;
icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
}
#endif

2
net/ipv4/tcp.c
View File

@ -1914,7 +1914,7 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info)
info->tcpi_last_data_recv = jiffies_to_msecs(now - icsk->icsk_ack.lrcvtime);
info->tcpi_last_ack_recv = jiffies_to_msecs(now - tp->rcv_tstamp);
info->tcpi_pmtu = tp->pmtu_cookie;
info->tcpi_pmtu = icsk->icsk_pmtu_cookie;
info->tcpi_rcv_ssthresh = tp->rcv_ssthresh;
info->tcpi_rtt = jiffies_to_usecs(tp->srtt)>>3;
info->tcpi_rttvar = jiffies_to_usecs(tp->mdev)>>2;

10
net/ipv4/tcp_input.c
View File

@ -2342,7 +2342,7 @@ static int tcp_ack_update_window(struct sock *sk, struct tcp_sock *tp,
if (nwin > tp->max_window) {
tp->max_window = nwin;
tcp_sync_mss(sk, tp->pmtu_cookie);
tcp_sync_mss(sk, inet_csk(sk)->icsk_pmtu_cookie);
}
}
}
@ -3967,12 +3967,12 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
struct tcphdr *th, unsigned len)
{
struct tcp_sock *tp = tcp_sk(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
int saved_clamp = tp->rx_opt.mss_clamp;
tcp_parse_options(skb, &tp->rx_opt, 0);
if (th->ack) {
struct inet_connection_sock *icsk;
/* rfc793:
* "If the state is SYN-SENT then
* first check the ACK bit
@ -4061,7 +4061,7 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
if (tp->rx_opt.sack_ok && sysctl_tcp_fack)
tp->rx_opt.sack_ok |= 2;
tcp_sync_mss(sk, tp->pmtu_cookie);
tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
tcp_initialize_rcv_mss(sk);
/* Remember, tcp_poll() does not lock socket!
@ -4071,8 +4071,6 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
mb();
tcp_set_state(sk, TCP_ESTABLISHED);
icsk = inet_csk(sk);
/* Make sure socket is routed, for correct metrics. */
icsk->icsk_af_ops->rebuild_header(sk);
@ -4173,7 +4171,7 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
if (tp->ecn_flags&TCP_ECN_OK)
sock_set_flag(sk, SOCK_NO_LARGESEND);
tcp_sync_mss(sk, tp->pmtu_cookie);
tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
tcp_initialize_rcv_mss(sk);

12
net/ipv4/tcp_ipv4.c
View File

@ -220,9 +220,9 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
inet->dport = usin->sin_port;
inet->daddr = daddr;
tp->ext_header_len = 0;
inet_csk(sk)->icsk_ext_hdr_len = 0;
if (inet->opt)
tp->ext_header_len = inet->opt->optlen;
inet_csk(sk)->icsk_ext_hdr_len = inet->opt->optlen;
tp->rx_opt.mss_clamp = 536;
@ -275,7 +275,6 @@ static inline void do_pmtu_discovery(struct sock *sk, struct iphdr *iph,
{
struct dst_entry *dst;
struct inet_sock *inet = inet_sk(sk);
struct tcp_sock *tp = tcp_sk(sk);
/* We are not interested in TCP_LISTEN and open_requests (SYN-ACKs
* send out by Linux are always <576bytes so they should go through
@ -304,7 +303,7 @@ static inline void do_pmtu_discovery(struct sock *sk, struct iphdr *iph,
mtu = dst_mtu(dst);
if (inet->pmtudisc != IP_PMTUDISC_DONT &&
tp->pmtu_cookie > mtu) {
inet_csk(sk)->icsk_pmtu_cookie > mtu) {
tcp_sync_mss(sk, mtu);
/* Resend the TCP packet because it's
@ -895,9 +894,9 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
ireq->opt = NULL;
newinet->mc_index = inet_iif(skb);
newinet->mc_ttl = skb->nh.iph->ttl;
newtp->ext_header_len = 0;
inet_csk(newsk)->icsk_ext_hdr_len = 0;
if (newinet->opt)
newtp->ext_header_len = newinet->opt->optlen;
inet_csk(newsk)->icsk_ext_hdr_len = newinet->opt->optlen;
newinet->id = newtp->write_seq ^ jiffies;
tcp_sync_mss(newsk, dst_mtu(dst));
@ -1266,6 +1265,7 @@ static int tcp_v4_init_sock(struct sock *sk)
sock_set_flag(sk, SOCK_USE_WRITE_QUEUE);
icsk->icsk_af_ops = &ipv4_specific;
icsk->icsk_sync_mss = tcp_sync_mss;
sk->sk_sndbuf = sysctl_tcp_wmem[1];
sk->sk_rcvbuf = sysctl_tcp_rmem[1];

18
net/ipv4/tcp_output.c
View File

@ -621,7 +621,7 @@ int tcp_trim_head(struct sock *sk, struct sk_buff *skb, u32 len)
It is minimum of user_mss and mss received with SYN.
It also does not include TCP options.
tp->pmtu_cookie is last pmtu, seen by this function.
inet_csk(sk)->icsk_pmtu_cookie is last pmtu, seen by this function.
tp->mss_cache is current effective sending mss, including
all tcp options except for SACKs. It is evaluated,
@ -631,17 +631,18 @@ int tcp_trim_head(struct sock *sk, struct sk_buff *skb, u32 len)
NOTE1. rfc1122 clearly states that advertised MSS
DOES NOT include either tcp or ip options.
NOTE2. tp->pmtu_cookie and tp->mss_cache are READ ONLY outside
this function. --ANK (980731)
NOTE2. inet_csk(sk)->icsk_pmtu_cookie and tp->mss_cache
are READ ONLY outside this function. --ANK (980731)
*/
unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu)
{
struct tcp_sock *tp = tcp_sk(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
/* Calculate base mss without TCP options:
It is MMS_S - sizeof(tcphdr) of rfc1122
*/
int mss_now = (pmtu - inet_csk(sk)->icsk_af_ops->net_header_len -
int mss_now = (pmtu - icsk->icsk_af_ops->net_header_len -
sizeof(struct tcphdr));
/* Clamp it (mss_clamp does not include tcp options) */
@ -649,7 +650,7 @@ unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu)
mss_now = tp->rx_opt.mss_clamp;
/* Now subtract optional transport overhead */
mss_now -= tp->ext_header_len;
mss_now -= icsk->icsk_ext_hdr_len;
/* Then reserve room for full set of TCP options and 8 bytes of data */
if (mss_now < 48)
@ -663,7 +664,7 @@ unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu)
mss_now = max((tp->max_window>>1), 68U - tp->tcp_header_len);
/* And store cached results */
tp->pmtu_cookie = pmtu;
icsk->icsk_pmtu_cookie = pmtu;
tp->mss_cache = mss_now;
return mss_now;
@ -693,7 +694,7 @@ unsigned int tcp_current_mss(struct sock *sk, int large_allowed)
if (dst) {
u32 mtu = dst_mtu(dst);
if (mtu != tp->pmtu_cookie)
if (mtu != inet_csk(sk)->icsk_pmtu_cookie)
mss_now = tcp_sync_mss(sk, mtu);
}
@ -706,7 +707,8 @@ unsigned int tcp_current_mss(struct sock *sk, int large_allowed)
if (doing_tso) {
xmit_size_goal = (65535 -
inet_csk(sk)->icsk_af_ops->net_header_len -
tp->ext_header_len - tp->tcp_header_len);
inet_csk(sk)->icsk_ext_hdr_len -
tp->tcp_header_len);
if (tp->max_window &&
(xmit_size_goal > (tp->max_window >> 1)))

1
net/ipv6/af_inet6.c
View File

@ -167,6 +167,7 @@ static int inet6_create(struct socket *sock, int protocol)
sk->sk_reuse = 1;
inet = inet_sk(sk);
inet->is_icsk = INET_PROTOSW_ICSK & answer_flags;
if (SOCK_RAW == sock->type) {
inet->num = protocol;

24
net/ipv6/ipv6_sockglue.c
View File

@ -163,17 +163,17 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname,
sk_refcnt_debug_dec(sk);
if (sk->sk_protocol == IPPROTO_TCP) {
struct tcp_sock *tp = tcp_sk(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
local_bh_disable();
sock_prot_dec_use(sk->sk_prot);
sock_prot_inc_use(&tcp_prot);
local_bh_enable();
sk->sk_prot = &tcp_prot;
inet_csk(sk)->icsk_af_ops = &ipv4_specific;
icsk->icsk_af_ops = &ipv4_specific;
sk->sk_socket->ops = &inet_stream_ops;
sk->sk_family = PF_INET;
tcp_sync_mss(sk, tp->pmtu_cookie);
tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
} else {
local_bh_disable();
sock_prot_dec_use(sk->sk_prot);
@ -317,14 +317,15 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname,
}
retv = 0;
if (sk->sk_type == SOCK_STREAM) {
if (inet_sk(sk)->is_icsk) {
if (opt) {
struct tcp_sock *tp = tcp_sk(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
if (!((1 << sk->sk_state) &
(TCPF_LISTEN | TCPF_CLOSE))
&& inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
tp->ext_header_len = opt->opt_flen + opt->opt_nflen;
tcp_sync_mss(sk, tp->pmtu_cookie);
icsk->icsk_ext_hdr_len =
opt->opt_flen + opt->opt_nflen;
icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
}
}
opt = xchg(&np->opt, opt);
@ -380,14 +381,15 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname,
goto done;
update:
retv = 0;
if (sk->sk_type == SOCK_STREAM) {
if (inet_sk(sk)->is_icsk) {
if (opt) {
struct tcp_sock *tp = tcp_sk(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
if (!((1 << sk->sk_state) &
(TCPF_LISTEN | TCPF_CLOSE))
&& inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
tp->ext_header_len = opt->opt_flen + opt->opt_nflen;
tcp_sync_mss(sk, tp->pmtu_cookie);
icsk->icsk_ext_hdr_len =
opt->opt_flen + opt->opt_nflen;
icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
}
}
opt = xchg(&np->opt, opt);

30
net/ipv6/tcp_ipv6.c
View File

@ -123,7 +123,8 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
int addr_len)
{
struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr;
struct inet_sock *inet = inet_sk(sk);
struct inet_sock *inet = inet_sk(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct tcp_sock *tp = tcp_sk(sk);
struct in6_addr *saddr = NULL, *final_p = NULL, final;
@ -198,7 +199,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
*/
if (addr_type == IPV6_ADDR_MAPPED) {
u32 exthdrlen = tp->ext_header_len;
u32 exthdrlen = icsk->icsk_ext_hdr_len;
struct sockaddr_in sin;
SOCK_DEBUG(sk, "connect: ipv4 mapped\n");
@ -210,14 +211,14 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
sin.sin_port = usin->sin6_port;
sin.sin_addr.s_addr = usin->sin6_addr.s6_addr32[3];
inet_csk(sk)->icsk_af_ops = &ipv6_mapped;
icsk->icsk_af_ops = &ipv6_mapped;
sk->sk_backlog_rcv = tcp_v4_do_rcv;
err = tcp_v4_connect(sk, (struct sockaddr *)&sin, sizeof(sin));
if (err) {
tp->ext_header_len = exthdrlen;
inet_csk(sk)->icsk_af_ops = &ipv6_specific;
icsk->icsk_ext_hdr_len = exthdrlen;
icsk->icsk_af_ops = &ipv6_specific;
sk->sk_backlog_rcv = tcp_v6_do_rcv;
goto failure;
} else {
@ -270,9 +271,10 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
sk->sk_route_caps = dst->dev->features &
~(NETIF_F_IP_CSUM | NETIF_F_TSO);
tp->ext_header_len = 0;
icsk->icsk_ext_hdr_len = 0;
if (np->opt)
tp->ext_header_len = np->opt->opt_flen + np->opt->opt_nflen;
icsk->icsk_ext_hdr_len = (np->opt->opt_flen +
np->opt->opt_nflen);
tp->rx_opt.mss_clamp = IPV6_MIN_MTU - sizeof(struct tcphdr) - sizeof(struct ipv6hdr);
@ -385,7 +387,7 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
} else
dst_hold(dst);
if (tp->pmtu_cookie > dst_mtu(dst)) {
if (inet_csk(sk)->icsk_pmtu_cookie > dst_mtu(dst)) {
tcp_sync_mss(sk, dst_mtu(dst));
tcp_simple_retransmit(sk);
} /* else let the usual retransmit timer handle it */
@ -869,7 +871,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
worked with IPv6 icsk.icsk_af_ops.
Sync it now.
*/
tcp_sync_mss(newsk, newtp->pmtu_cookie);
tcp_sync_mss(newsk, inet_csk(newsk)->icsk_pmtu_cookie);
return newsk;
}
@ -976,10 +978,10 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
sock_kfree_s(sk, opt, opt->tot_len);
}
newtp->ext_header_len = 0;
inet_csk(newsk)->icsk_ext_hdr_len = 0;
if (newnp->opt)
newtp->ext_header_len = newnp->opt->opt_nflen +
newnp->opt->opt_flen;
inet_csk(newsk)->icsk_ext_hdr_len = (newnp->opt->opt_nflen +
newnp->opt->opt_flen);
tcp_sync_mss(newsk, dst_mtu(dst));
newtp->advmss = dst_metric(dst, RTAX_ADVMSS);
@ -1361,6 +1363,7 @@ static int tcp_v6_init_sock(struct sock *sk)
icsk->icsk_af_ops = &ipv6_specific;
icsk->icsk_ca_ops = &tcp_init_congestion_ops;
icsk->icsk_sync_mss = tcp_sync_mss;
sk->sk_write_space = sk_stream_write_space;
sock_set_flag(sk, SOCK_USE_WRITE_QUEUE);
@ -1591,7 +1594,8 @@ static struct inet_protosw tcpv6_protosw = {
.ops = &inet6_stream_ops,
.capability = -1,
.no_check = 0,
.flags = INET_PROTOSW_PERMANENT,
.flags = INET_PROTOSW_PERMANENT |
INET_PROTOSW_ICSK,
};
void __init tcpv6_init(void)