diff options
author | Eric Dumazet <edumazet@google.com> | 2017-06-07 20:34:39 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2017-06-08 17:53:29 +0300 |
commit | 5d2ed0521ac98f1ae0243fe52b8ebf95e2abf791 (patch) | |
tree | a339d50c4c0977fa75bc467fafd93ff6a922dec2 | |
parent | 9bb37ef00e932eb4b989e855245468feb3980700 (diff) | |
download | linux-5d2ed0521ac98f1ae0243fe52b8ebf95e2abf791.tar.xz |
tcp: Namespaceify sysctl_tcp_timestamps
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | include/net/netns/ipv4.h | 1 | ||||
-rw-r--r-- | include/net/secure_seq.h | 5 | ||||
-rw-r--r-- | include/net/tcp.h | 3 | ||||
-rw-r--r-- | net/core/secure_seq.c | 9 | ||||
-rw-r--r-- | net/ipv4/syncookies.c | 6 | ||||
-rw-r--r-- | net/ipv4/sysctl_net_ipv4.c | 14 | ||||
-rw-r--r-- | net/ipv4/tcp_input.c | 5 | ||||
-rw-r--r-- | net/ipv4/tcp_ipv4.c | 9 | ||||
-rw-r--r-- | net/ipv4/tcp_output.c | 7 | ||||
-rw-r--r-- | net/ipv6/syncookies.c | 3 | ||||
-rw-r--r-- | net/ipv6/tcp_ipv6.c | 7 |
11 files changed, 38 insertions, 31 deletions
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h index 1a2ae74a1085..9a14a0850b0e 100644 --- a/include/net/netns/ipv4.h +++ b/include/net/netns/ipv4.h @@ -124,6 +124,7 @@ struct netns_ipv4 { int sysctl_tcp_tw_reuse; int sysctl_tcp_sack; int sysctl_tcp_window_scaling; + int sysctl_tcp_timestamps; struct inet_timewait_death_row tcp_death_row; int sysctl_max_syn_backlog; diff --git a/include/net/secure_seq.h b/include/net/secure_seq.h index b94006f6fbdd..031bf16d1521 100644 --- a/include/net/secure_seq.h +++ b/include/net/secure_seq.h @@ -8,10 +8,11 @@ u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr, __be16 dport); u32 secure_tcp_seq(__be32 saddr, __be32 daddr, __be16 sport, __be16 dport); -u32 secure_tcp_ts_off(__be32 saddr, __be32 daddr); +u32 secure_tcp_ts_off(const struct net *net, __be32 saddr, __be32 daddr); u32 secure_tcpv6_seq(const __be32 *saddr, const __be32 *daddr, __be16 sport, __be16 dport); -u32 secure_tcpv6_ts_off(const __be32 *saddr, const __be32 *daddr); +u32 secure_tcpv6_ts_off(const struct net *net, + const __be32 *saddr, const __be32 *daddr); u64 secure_dccp_sequence_number(__be32 saddr, __be32 daddr, __be16 sport, __be16 dport); u64 secure_dccpv6_sequence_number(__be32 *saddr, __be32 *daddr, diff --git a/include/net/tcp.h b/include/net/tcp.h index f41ed5bac493..aec092560d9b 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -237,7 +237,6 @@ void tcp_time_wait(struct sock *sk, int state, int timeo); /* sysctl variables for tcp */ -extern int sysctl_tcp_timestamps; extern int sysctl_tcp_fastopen; extern int sysctl_tcp_retrans_collapse; extern int sysctl_tcp_stdurg; @@ -1869,7 +1868,7 @@ struct tcp_request_sock_ops { struct dst_entry *(*route_req)(const struct sock *sk, struct flowi *fl, const struct request_sock *req); u32 (*init_seq)(const struct sk_buff *skb); - u32 (*init_ts_off)(const struct sk_buff *skb); + u32 (*init_ts_off)(const struct net *net, const struct sk_buff *skb); int (*send_synack)(const struct sock *sk, struct dst_entry *dst, struct flowi *fl, struct request_sock *req, struct tcp_fastopen_cookie *foc, diff --git a/net/core/secure_seq.c b/net/core/secure_seq.c index ae35cce3a40d..7232274de334 100644 --- a/net/core/secure_seq.c +++ b/net/core/secure_seq.c @@ -51,7 +51,8 @@ static u32 seq_scale(u32 seq) #endif #if IS_ENABLED(CONFIG_IPV6) -u32 secure_tcpv6_ts_off(const __be32 *saddr, const __be32 *daddr) +u32 secure_tcpv6_ts_off(const struct net *net, + const __be32 *saddr, const __be32 *daddr) { const struct { struct in6_addr saddr; @@ -61,7 +62,7 @@ u32 secure_tcpv6_ts_off(const __be32 *saddr, const __be32 *daddr) .daddr = *(struct in6_addr *)daddr, }; - if (sysctl_tcp_timestamps != 1) + if (net->ipv4.sysctl_tcp_timestamps != 1) return 0; ts_secret_init(); @@ -113,9 +114,9 @@ EXPORT_SYMBOL(secure_ipv6_port_ephemeral); #endif #ifdef CONFIG_INET -u32 secure_tcp_ts_off(__be32 saddr, __be32 daddr) +u32 secure_tcp_ts_off(const struct net *net, __be32 saddr, __be32 daddr) { - if (sysctl_tcp_timestamps != 1) + if (net->ipv4.sysctl_tcp_timestamps != 1) return 0; ts_secret_init(); diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c index 3d74a45773f1..7835bb4a1fab 100644 --- a/net/ipv4/syncookies.c +++ b/net/ipv4/syncookies.c @@ -243,7 +243,7 @@ bool cookie_timestamp_decode(const struct net *net, return true; } - if (!sysctl_tcp_timestamps) + if (!net->ipv4.sysctl_tcp_timestamps) return false; tcp_opt->sack_ok = (options & TS_OPT_SACK) ? TCP_SACK_SEEN : 0; @@ -316,7 +316,9 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb) tcp_parse_options(sock_net(sk), skb, &tcp_opt, 0, NULL); if (tcp_opt.saw_tstamp && tcp_opt.rcv_tsecr) { - tsoff = secure_tcp_ts_off(ip_hdr(skb)->daddr, ip_hdr(skb)->saddr); + tsoff = secure_tcp_ts_off(sock_net(sk), + ip_hdr(skb)->daddr, + ip_hdr(skb)->saddr); tcp_opt.rcv_tsecr -= tsoff; } diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index c30ac2ba0e14..7065234a89a5 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -365,13 +365,6 @@ static int proc_tfo_blackhole_detect_timeout(struct ctl_table *table, static struct ctl_table ipv4_table[] = { { - .procname = "tcp_timestamps", - .data = &sysctl_tcp_timestamps, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = proc_dointvec - }, - { .procname = "tcp_retrans_collapse", .data = &sysctl_tcp_retrans_collapse, .maxlen = sizeof(int), @@ -1116,6 +1109,13 @@ static struct ctl_table ipv4_net_table[] = { .mode = 0644, .proc_handler = proc_dointvec }, + { + .procname = "tcp_timestamps", + .data = &init_net.ipv4.sysctl_tcp_timestamps, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec + }, { } }; diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 675ee903370f..2ab7e2fa9bb9 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -76,7 +76,6 @@ #include <asm/unaligned.h> #include <linux/errqueue.h> -int sysctl_tcp_timestamps __read_mostly = 1; int sysctl_tcp_fack __read_mostly; int sysctl_tcp_max_reordering __read_mostly = 300; int sysctl_tcp_dsack __read_mostly = 1; @@ -3780,7 +3779,7 @@ void tcp_parse_options(const struct net *net, case TCPOPT_TIMESTAMP: if ((opsize == TCPOLEN_TIMESTAMP) && ((estab && opt_rx->tstamp_ok) || - (!estab && sysctl_tcp_timestamps))) { + (!estab && net->ipv4.sysctl_tcp_timestamps))) { opt_rx->saw_tstamp = 1; opt_rx->rcv_tsval = get_unaligned_be32(ptr); opt_rx->rcv_tsecr = get_unaligned_be32(ptr + 4); @@ -6352,7 +6351,7 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops, goto drop_and_free; if (tmp_opt.tstamp_ok) - tcp_rsk(req)->ts_off = af_ops->init_ts_off(skb); + tcp_rsk(req)->ts_off = af_ops->init_ts_off(net, skb); if (!want_cookie && !isn) { /* Kill the following clause, if you dislike this way. */ diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index e07ef5b14aaf..13c7ae7d4504 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -102,10 +102,9 @@ static u32 tcp_v4_init_seq(const struct sk_buff *skb) tcp_hdr(skb)->source); } -static u32 tcp_v4_init_ts_off(const struct sk_buff *skb) +static u32 tcp_v4_init_ts_off(const struct net *net, const struct sk_buff *skb) { - return secure_tcp_ts_off(ip_hdr(skb)->daddr, - ip_hdr(skb)->saddr); + return secure_tcp_ts_off(net, ip_hdr(skb)->daddr, ip_hdr(skb)->saddr); } int tcp_twsk_unique(struct sock *sk, struct sock *sktw, void *twp) @@ -242,7 +241,8 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) inet->inet_daddr, inet->inet_sport, usin->sin_port); - tp->tsoffset = secure_tcp_ts_off(inet->inet_saddr, + tp->tsoffset = secure_tcp_ts_off(sock_net(sk), + inet->inet_saddr, inet->inet_daddr); } @@ -2467,6 +2467,7 @@ static int __net_init tcp_sk_init(struct net *net) net->ipv4.sysctl_max_syn_backlog = max(128, cnt / 256); net->ipv4.sysctl_tcp_sack = 1; net->ipv4.sysctl_tcp_window_scaling = 1; + net->ipv4.sysctl_tcp_timestamps = 1; return 0; fail: diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 3f4095010785..9a9c395b6235 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -569,7 +569,7 @@ static unsigned int tcp_syn_options(struct sock *sk, struct sk_buff *skb, opts->mss = tcp_advertise_mss(sk); remaining -= TCPOLEN_MSS_ALIGNED; - if (likely(sysctl_tcp_timestamps && !*md5)) { + if (likely(sock_net(sk)->ipv4.sysctl_tcp_timestamps && !*md5)) { opts->options |= OPTION_TS; opts->tsval = tcp_skb_timestamp(skb) + tp->tsoffset; opts->tsecr = tp->rx_opt.ts_recent; @@ -3271,8 +3271,9 @@ static void tcp_connect_init(struct sock *sk) /* We'll fix this up when we get a response from the other end. * See tcp_input.c:tcp_rcv_state_process case TCP_SYN_SENT. */ - tp->tcp_header_len = sizeof(struct tcphdr) + - (sysctl_tcp_timestamps ? TCPOLEN_TSTAMP_ALIGNED : 0); + tp->tcp_header_len = sizeof(struct tcphdr); + if (sock_net(sk)->ipv4.sysctl_tcp_timestamps) + tp->tcp_header_len += TCPOLEN_TSTAMP_ALIGNED; #ifdef CONFIG_TCP_MD5SIG if (tp->af_specific->md5_lookup(sk, sk)) diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c index aa6443c6da19..2f7e99af67db 100644 --- a/net/ipv6/syncookies.c +++ b/net/ipv6/syncookies.c @@ -165,7 +165,8 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb) tcp_parse_options(sock_net(sk), skb, &tcp_opt, 0, NULL); if (tcp_opt.saw_tstamp && tcp_opt.rcv_tsecr) { - tsoff = secure_tcpv6_ts_off(ipv6_hdr(skb)->daddr.s6_addr32, + tsoff = secure_tcpv6_ts_off(sock_net(sk), + ipv6_hdr(skb)->daddr.s6_addr32, ipv6_hdr(skb)->saddr.s6_addr32); tcp_opt.rcv_tsecr -= tsoff; } diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 233edfabe1db..5a525426fe93 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -109,9 +109,9 @@ static u32 tcp_v6_init_seq(const struct sk_buff *skb) tcp_hdr(skb)->source); } -static u32 tcp_v6_init_ts_off(const struct sk_buff *skb) +static u32 tcp_v6_init_ts_off(const struct net *net, const struct sk_buff *skb) { - return secure_tcpv6_ts_off(ipv6_hdr(skb)->daddr.s6_addr32, + return secure_tcpv6_ts_off(net, ipv6_hdr(skb)->daddr.s6_addr32, ipv6_hdr(skb)->saddr.s6_addr32); } @@ -292,7 +292,8 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr, sk->sk_v6_daddr.s6_addr32, inet->inet_sport, inet->inet_dport); - tp->tsoffset = secure_tcpv6_ts_off(np->saddr.s6_addr32, + tp->tsoffset = secure_tcpv6_ts_off(sock_net(sk), + np->saddr.s6_addr32, sk->sk_v6_daddr.s6_addr32); } |