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-rw-r--r--net/mptcp/crypto_test.c1
-rw-r--r--net/mptcp/mib.c1
-rw-r--r--net/mptcp/mib.h8
-rw-r--r--net/mptcp/mptcp_pm_gen.c2
-rw-r--r--net/mptcp/mptcp_pm_gen.h2
-rw-r--r--net/mptcp/pm_netlink.c7
-rw-r--r--net/mptcp/pm_userspace.c8
-rw-r--r--net/mptcp/protocol.c170
-rw-r--r--net/mptcp/protocol.h19
-rw-r--r--net/mptcp/sockopt.c29
-rw-r--r--net/mptcp/subflow.c41
-rw-r--r--net/mptcp/token_test.c1
12 files changed, 178 insertions, 111 deletions
diff --git a/net/mptcp/crypto_test.c b/net/mptcp/crypto_test.c
index 017248dea038..220414e5c850 100644
--- a/net/mptcp/crypto_test.c
+++ b/net/mptcp/crypto_test.c
@@ -70,3 +70,4 @@ static struct kunit_suite mptcp_crypto_suite = {
kunit_test_suite(mptcp_crypto_suite);
MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("KUnit tests for MPTCP Crypto");
diff --git a/net/mptcp/mib.c b/net/mptcp/mib.c
index a0990c365a2e..c30405e76833 100644
--- a/net/mptcp/mib.c
+++ b/net/mptcp/mib.c
@@ -66,6 +66,7 @@ static const struct snmp_mib mptcp_snmp_list[] = {
SNMP_MIB_ITEM("RcvWndShared", MPTCP_MIB_RCVWNDSHARED),
SNMP_MIB_ITEM("RcvWndConflictUpdate", MPTCP_MIB_RCVWNDCONFLICTUPDATE),
SNMP_MIB_ITEM("RcvWndConflict", MPTCP_MIB_RCVWNDCONFLICT),
+ SNMP_MIB_ITEM("MPCurrEstab", MPTCP_MIB_CURRESTAB),
SNMP_MIB_SENTINEL
};
diff --git a/net/mptcp/mib.h b/net/mptcp/mib.h
index cae71d947252..dd7fd1f246b5 100644
--- a/net/mptcp/mib.h
+++ b/net/mptcp/mib.h
@@ -65,6 +65,7 @@ enum linux_mptcp_mib_field {
* conflict with another subflow while updating msk rcv wnd
*/
MPTCP_MIB_RCVWNDCONFLICT, /* Conflict with while updating msk rcv wnd */
+ MPTCP_MIB_CURRESTAB, /* Current established MPTCP connections */
__MPTCP_MIB_MAX
};
@@ -95,4 +96,11 @@ static inline void __MPTCP_INC_STATS(struct net *net,
__SNMP_INC_STATS(net->mib.mptcp_statistics, field);
}
+static inline void MPTCP_DEC_STATS(struct net *net,
+ enum linux_mptcp_mib_field field)
+{
+ if (likely(net->mib.mptcp_statistics))
+ SNMP_DEC_STATS(net->mib.mptcp_statistics, field);
+}
+
bool mptcp_mib_alloc(struct net *net);
diff --git a/net/mptcp/mptcp_pm_gen.c b/net/mptcp/mptcp_pm_gen.c
index a2325e70ddab..670da7822e6c 100644
--- a/net/mptcp/mptcp_pm_gen.c
+++ b/net/mptcp/mptcp_pm_gen.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
/* Do not edit directly, auto-generated from: */
-/* Documentation/netlink/specs/mptcp.yaml */
+/* Documentation/netlink/specs/mptcp_pm.yaml */
/* YNL-GEN kernel source */
#include <net/netlink.h>
diff --git a/net/mptcp/mptcp_pm_gen.h b/net/mptcp/mptcp_pm_gen.h
index 10579d184587..ac9fc7225b6a 100644
--- a/net/mptcp/mptcp_pm_gen.h
+++ b/net/mptcp/mptcp_pm_gen.h
@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
/* Do not edit directly, auto-generated from: */
-/* Documentation/netlink/specs/mptcp.yaml */
+/* Documentation/netlink/specs/mptcp_pm.yaml */
/* YNL-GEN kernel header */
#ifndef _LINUX_MPTCP_PM_GEN_H
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index bf4d96f6f99a..287a60381eae 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -1048,6 +1048,11 @@ static int mptcp_pm_nl_create_listen_socket(struct sock *sk,
if (err)
return err;
+ /* We don't use mptcp_set_state() here because it needs to be called
+ * under the msk socket lock. For the moment, that will not bring
+ * anything more than only calling inet_sk_state_store(), because the
+ * old status is known (TCP_CLOSE).
+ */
inet_sk_state_store(newsk, TCP_LISTEN);
lock_sock(ssk);
err = __inet_listen_sk(ssk, backlog);
@@ -1100,7 +1105,7 @@ int mptcp_pm_nl_get_local_id(struct mptcp_sock *msk, struct mptcp_addr_info *skc
static const struct genl_multicast_group mptcp_pm_mcgrps[] = {
[MPTCP_PM_CMD_GRP_OFFSET] = { .name = MPTCP_PM_CMD_GRP_NAME, },
[MPTCP_PM_EV_GRP_OFFSET] = { .name = MPTCP_PM_EV_GRP_NAME,
- .flags = GENL_UNS_ADMIN_PERM,
+ .flags = GENL_MCAST_CAP_NET_ADMIN,
},
};
diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c
index 5c01b9bc619a..efecbe3cf415 100644
--- a/net/mptcp/pm_userspace.c
+++ b/net/mptcp/pm_userspace.c
@@ -276,12 +276,12 @@ int mptcp_pm_nl_remove_doit(struct sk_buff *skb, struct genl_info *info)
if (!mptcp_pm_is_userspace(msk)) {
GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
- goto remove_err;
+ goto out;
}
if (id_val == 0) {
err = mptcp_userspace_pm_remove_id_zero_address(msk, info);
- goto remove_err;
+ goto out;
}
lock_sock(sk);
@@ -296,7 +296,7 @@ int mptcp_pm_nl_remove_doit(struct sk_buff *skb, struct genl_info *info)
if (!match) {
GENL_SET_ERR_MSG(info, "address with specified id not found");
release_sock(sk);
- goto remove_err;
+ goto out;
}
list_move(&match->list, &free_list);
@@ -310,7 +310,7 @@ int mptcp_pm_nl_remove_doit(struct sk_buff *skb, struct genl_info *info)
}
err = 0;
- remove_err:
+out:
sock_put(sk);
return err;
}
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index bc81ea53a049..3ed4709a7509 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -55,28 +55,14 @@ static u64 mptcp_wnd_end(const struct mptcp_sock *msk)
return READ_ONCE(msk->wnd_end);
}
-static bool mptcp_is_tcpsk(struct sock *sk)
+static const struct proto_ops *mptcp_fallback_tcp_ops(const struct sock *sk)
{
- struct socket *sock = sk->sk_socket;
-
- if (unlikely(sk->sk_prot == &tcp_prot)) {
- /* we are being invoked after mptcp_accept() has
- * accepted a non-mp-capable flow: sk is a tcp_sk,
- * not an mptcp one.
- *
- * Hand the socket over to tcp so all further socket ops
- * bypass mptcp.
- */
- WRITE_ONCE(sock->ops, &inet_stream_ops);
- return true;
#if IS_ENABLED(CONFIG_MPTCP_IPV6)
- } else if (unlikely(sk->sk_prot == &tcpv6_prot)) {
- WRITE_ONCE(sock->ops, &inet6_stream_ops);
- return true;
+ if (sk->sk_prot == &tcpv6_prot)
+ return &inet6_stream_ops;
#endif
- }
-
- return false;
+ WARN_ON_ONCE(sk->sk_prot != &tcp_prot);
+ return &inet_stream_ops;
}
static int __mptcp_socket_create(struct mptcp_sock *msk)
@@ -443,11 +429,11 @@ static void mptcp_check_data_fin_ack(struct sock *sk)
switch (sk->sk_state) {
case TCP_FIN_WAIT1:
- inet_sk_state_store(sk, TCP_FIN_WAIT2);
+ mptcp_set_state(sk, TCP_FIN_WAIT2);
break;
case TCP_CLOSING:
case TCP_LAST_ACK:
- inet_sk_state_store(sk, TCP_CLOSE);
+ mptcp_set_state(sk, TCP_CLOSE);
break;
}
@@ -608,13 +594,13 @@ static bool mptcp_check_data_fin(struct sock *sk)
switch (sk->sk_state) {
case TCP_ESTABLISHED:
- inet_sk_state_store(sk, TCP_CLOSE_WAIT);
+ mptcp_set_state(sk, TCP_CLOSE_WAIT);
break;
case TCP_FIN_WAIT1:
- inet_sk_state_store(sk, TCP_CLOSING);
+ mptcp_set_state(sk, TCP_CLOSING);
break;
case TCP_FIN_WAIT2:
- inet_sk_state_store(sk, TCP_CLOSE);
+ mptcp_set_state(sk, TCP_CLOSE);
break;
default:
/* Other states not expected */
@@ -789,7 +775,7 @@ static bool __mptcp_subflow_error_report(struct sock *sk, struct sock *ssk)
*/
ssk_state = inet_sk_state_load(ssk);
if (ssk_state == TCP_CLOSE && !sock_flag(sk, SOCK_DEAD))
- inet_sk_state_store(sk, ssk_state);
+ mptcp_set_state(sk, ssk_state);
WRITE_ONCE(sk->sk_err, -err);
/* This barrier is coupled with smp_rmb() in mptcp_poll() */
@@ -2477,7 +2463,7 @@ out:
inet_sk_state_load(msk->first) == TCP_CLOSE) {
if (sk->sk_state != TCP_ESTABLISHED ||
msk->in_accept_queue || sock_flag(sk, SOCK_DEAD)) {
- inet_sk_state_store(sk, TCP_CLOSE);
+ mptcp_set_state(sk, TCP_CLOSE);
mptcp_close_wake_up(sk);
} else {
mptcp_start_tout_timer(sk);
@@ -2572,7 +2558,7 @@ static void mptcp_check_fastclose(struct mptcp_sock *msk)
WRITE_ONCE(sk->sk_err, ECONNRESET);
}
- inet_sk_state_store(sk, TCP_CLOSE);
+ mptcp_set_state(sk, TCP_CLOSE);
WRITE_ONCE(sk->sk_shutdown, SHUTDOWN_MASK);
smp_mb__before_atomic(); /* SHUTDOWN must be visible first */
set_bit(MPTCP_WORK_CLOSE_SUBFLOW, &msk->flags);
@@ -2707,7 +2693,7 @@ static void mptcp_do_fastclose(struct sock *sk)
struct mptcp_subflow_context *subflow, *tmp;
struct mptcp_sock *msk = mptcp_sk(sk);
- inet_sk_state_store(sk, TCP_CLOSE);
+ mptcp_set_state(sk, TCP_CLOSE);
mptcp_for_each_subflow_safe(msk, subflow, tmp)
__mptcp_close_ssk(sk, mptcp_subflow_tcp_sock(subflow),
subflow, MPTCP_CF_FASTCLOSE);
@@ -2885,6 +2871,24 @@ void mptcp_subflow_shutdown(struct sock *sk, struct sock *ssk, int how)
release_sock(ssk);
}
+void mptcp_set_state(struct sock *sk, int state)
+{
+ int oldstate = sk->sk_state;
+
+ switch (state) {
+ case TCP_ESTABLISHED:
+ if (oldstate != TCP_ESTABLISHED)
+ MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_CURRESTAB);
+ break;
+
+ default:
+ if (oldstate == TCP_ESTABLISHED)
+ MPTCP_DEC_STATS(sock_net(sk), MPTCP_MIB_CURRESTAB);
+ }
+
+ inet_sk_state_store(sk, state);
+}
+
static const unsigned char new_state[16] = {
/* current state: new state: action: */
[0 /* (Invalid) */] = TCP_CLOSE,
@@ -2907,7 +2911,7 @@ static int mptcp_close_state(struct sock *sk)
int next = (int)new_state[sk->sk_state];
int ns = next & TCP_STATE_MASK;
- inet_sk_state_store(sk, ns);
+ mptcp_set_state(sk, ns);
return next & TCP_ACTION_FIN;
}
@@ -3018,7 +3022,7 @@ bool __mptcp_close(struct sock *sk, long timeout)
if ((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) {
mptcp_check_listen_stop(sk);
- inet_sk_state_store(sk, TCP_CLOSE);
+ mptcp_set_state(sk, TCP_CLOSE);
goto cleanup;
}
@@ -3061,7 +3065,7 @@ cleanup:
* state, let's not keep resources busy for no reasons
*/
if (subflows_alive == 0)
- inet_sk_state_store(sk, TCP_CLOSE);
+ mptcp_set_state(sk, TCP_CLOSE);
sock_hold(sk);
pr_debug("msk=%p state=%d", sk, sk->sk_state);
@@ -3127,7 +3131,7 @@ static int mptcp_disconnect(struct sock *sk, int flags)
return -EBUSY;
mptcp_check_listen_stop(sk);
- inet_sk_state_store(sk, TCP_CLOSE);
+ mptcp_set_state(sk, TCP_CLOSE);
mptcp_stop_rtx_timer(sk);
mptcp_stop_tout_timer(sk);
@@ -3215,7 +3219,7 @@ struct sock *mptcp_sk_clone_init(const struct sock *sk,
/* this can't race with mptcp_close(), as the msk is
* not yet exposted to user-space
*/
- inet_sk_state_store(nsk, TCP_ESTABLISHED);
+ mptcp_set_state(nsk, TCP_ESTABLISHED);
/* The msk maintain a ref to each subflow in the connections list */
WRITE_ONCE(msk->first, ssk);
@@ -3258,44 +3262,6 @@ void mptcp_rcv_space_init(struct mptcp_sock *msk, const struct sock *ssk)
WRITE_ONCE(msk->wnd_end, msk->snd_nxt + tcp_sk(ssk)->snd_wnd);
}
-static struct sock *mptcp_accept(struct sock *ssk, int flags, int *err,
- bool kern)
-{
- struct sock *newsk;
-
- pr_debug("ssk=%p, listener=%p", ssk, mptcp_subflow_ctx(ssk));
- newsk = inet_csk_accept(ssk, flags, err, kern);
- if (!newsk)
- return NULL;
-
- pr_debug("newsk=%p, subflow is mptcp=%d", newsk, sk_is_mptcp(newsk));
- if (sk_is_mptcp(newsk)) {
- struct mptcp_subflow_context *subflow;
- struct sock *new_mptcp_sock;
-
- subflow = mptcp_subflow_ctx(newsk);
- new_mptcp_sock = subflow->conn;
-
- /* is_mptcp should be false if subflow->conn is missing, see
- * subflow_syn_recv_sock()
- */
- if (WARN_ON_ONCE(!new_mptcp_sock)) {
- tcp_sk(newsk)->is_mptcp = 0;
- goto out;
- }
-
- newsk = new_mptcp_sock;
- MPTCP_INC_STATS(sock_net(ssk), MPTCP_MIB_MPCAPABLEPASSIVEACK);
- } else {
- MPTCP_INC_STATS(sock_net(ssk),
- MPTCP_MIB_MPCAPABLEPASSIVEFALLBACK);
- }
-
-out:
- newsk->sk_kern_sock = kern;
- return newsk;
-}
-
void mptcp_destroy_common(struct mptcp_sock *msk, unsigned int flags)
{
struct mptcp_subflow_context *subflow, *tmp;
@@ -3402,12 +3368,12 @@ static void mptcp_release_cb(struct sock *sk)
if (__test_and_clear_bit(MPTCP_CLEAN_UNA, &msk->cb_flags))
__mptcp_clean_una_wakeup(sk);
if (unlikely(msk->cb_flags)) {
- /* be sure to set the current sk state before taking actions
+ /* be sure to sync the msk state before taking actions
* depending on sk_state (MPTCP_ERROR_REPORT)
* On sk release avoid actions depending on the first subflow
*/
- if (__test_and_clear_bit(MPTCP_CONNECTED, &msk->cb_flags) && msk->first)
- __mptcp_set_connected(sk);
+ if (__test_and_clear_bit(MPTCP_SYNC_STATE, &msk->cb_flags) && msk->first)
+ __mptcp_sync_state(sk, msk->pending_state);
if (__test_and_clear_bit(MPTCP_ERROR_REPORT, &msk->cb_flags))
__mptcp_error_report(sk);
if (__test_and_clear_bit(MPTCP_SYNC_SNDBUF, &msk->cb_flags))
@@ -3674,7 +3640,7 @@ static int mptcp_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
if (IS_ERR(ssk))
return PTR_ERR(ssk);
- inet_sk_state_store(sk, TCP_SYN_SENT);
+ mptcp_set_state(sk, TCP_SYN_SENT);
subflow = mptcp_subflow_ctx(ssk);
#ifdef CONFIG_TCP_MD5SIG
/* no MPTCP if MD5SIG is enabled on this socket or we may run out of
@@ -3724,7 +3690,7 @@ out:
if (unlikely(err)) {
/* avoid leaving a dangling token in an unconnected socket */
mptcp_token_destroy(msk);
- inet_sk_state_store(sk, TCP_CLOSE);
+ mptcp_set_state(sk, TCP_CLOSE);
return err;
}
@@ -3739,7 +3705,6 @@ static struct proto mptcp_prot = {
.connect = mptcp_connect,
.disconnect = mptcp_disconnect,
.close = mptcp_close,
- .accept = mptcp_accept,
.setsockopt = mptcp_setsockopt,
.getsockopt = mptcp_getsockopt,
.shutdown = mptcp_shutdown,
@@ -3814,13 +3779,13 @@ static int mptcp_listen(struct socket *sock, int backlog)
goto unlock;
}
- inet_sk_state_store(sk, TCP_LISTEN);
+ mptcp_set_state(sk, TCP_LISTEN);
sock_set_flag(sk, SOCK_RCU_FREE);
lock_sock(ssk);
err = __inet_listen_sk(ssk, backlog);
release_sock(ssk);
- inet_sk_state_store(sk, inet_sk_state_load(ssk));
+ mptcp_set_state(sk, inet_sk_state_load(ssk));
if (!err) {
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
@@ -3849,18 +3814,36 @@ static int mptcp_stream_accept(struct socket *sock, struct socket *newsock,
if (!ssk)
return -EINVAL;
- newsk = mptcp_accept(ssk, flags, &err, kern);
+ pr_debug("ssk=%p, listener=%p", ssk, mptcp_subflow_ctx(ssk));
+ newsk = inet_csk_accept(ssk, flags, &err, kern);
if (!newsk)
return err;
- lock_sock(newsk);
-
- __inet_accept(sock, newsock, newsk);
- if (!mptcp_is_tcpsk(newsock->sk)) {
- struct mptcp_sock *msk = mptcp_sk(newsk);
+ pr_debug("newsk=%p, subflow is mptcp=%d", newsk, sk_is_mptcp(newsk));
+ if (sk_is_mptcp(newsk)) {
struct mptcp_subflow_context *subflow;
+ struct sock *new_mptcp_sock;
+
+ subflow = mptcp_subflow_ctx(newsk);
+ new_mptcp_sock = subflow->conn;
+
+ /* is_mptcp should be false if subflow->conn is missing, see
+ * subflow_syn_recv_sock()
+ */
+ if (WARN_ON_ONCE(!new_mptcp_sock)) {
+ tcp_sk(newsk)->is_mptcp = 0;
+ goto tcpfallback;
+ }
+
+ newsk = new_mptcp_sock;
+ MPTCP_INC_STATS(sock_net(ssk), MPTCP_MIB_MPCAPABLEPASSIVEACK);
+
+ newsk->sk_kern_sock = kern;
+ lock_sock(newsk);
+ __inet_accept(sock, newsock, newsk);
set_bit(SOCK_CUSTOM_SOCKOPT, &newsock->flags);
+ msk = mptcp_sk(newsk);
msk->in_accept_queue = 0;
/* set ssk->sk_socket of accept()ed flows to mptcp socket.
@@ -3880,8 +3863,23 @@ static int mptcp_stream_accept(struct socket *sock, struct socket *newsock,
__mptcp_close_ssk(newsk, msk->first,
mptcp_subflow_ctx(msk->first), 0);
if (unlikely(list_is_singular(&msk->conn_list)))
- inet_sk_state_store(newsk, TCP_CLOSE);
+ mptcp_set_state(newsk, TCP_CLOSE);
}
+ } else {
+ MPTCP_INC_STATS(sock_net(ssk),
+ MPTCP_MIB_MPCAPABLEPASSIVEFALLBACK);
+tcpfallback:
+ newsk->sk_kern_sock = kern;
+ lock_sock(newsk);
+ __inet_accept(sock, newsock, newsk);
+ /* we are being invoked after accepting a non-mp-capable
+ * flow: sk is a tcp_sk, not an mptcp one.
+ *
+ * Hand the socket over to tcp so all further socket ops
+ * bypass mptcp.
+ */
+ WRITE_ONCE(newsock->sk->sk_socket->ops,
+ mptcp_fallback_tcp_ops(newsock->sk));
}
release_sock(newsk);
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index fe6f2d399ee8..3517f2d24a22 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -124,7 +124,7 @@
#define MPTCP_ERROR_REPORT 3
#define MPTCP_RETRANSMIT 4
#define MPTCP_FLUSH_JOIN_LIST 5
-#define MPTCP_CONNECTED 6
+#define MPTCP_SYNC_STATE 6
#define MPTCP_SYNC_SNDBUF 7
struct mptcp_skb_cb {
@@ -296,6 +296,9 @@ struct mptcp_sock {
bool use_64bit_ack; /* Set when we received a 64-bit DSN */
bool csum_enabled;
bool allow_infinite_fallback;
+ u8 pending_state; /* A subflow asked to set this sk_state,
+ * protected by the msk data lock
+ */
u8 mpc_endpoint_id;
u8 recvmsg_inq:1,
cork:1,
@@ -638,6 +641,7 @@ bool __mptcp_close(struct sock *sk, long timeout);
void mptcp_cancel_work(struct sock *sk);
void __mptcp_unaccepted_force_close(struct sock *sk);
void mptcp_set_owner_r(struct sk_buff *skb, struct sock *sk);
+void mptcp_set_state(struct sock *sk, int state);
bool mptcp_addresses_equal(const struct mptcp_addr_info *a,
const struct mptcp_addr_info *b, bool use_port);
@@ -728,7 +732,7 @@ void mptcp_get_options(const struct sk_buff *skb,
struct mptcp_options_received *mp_opt);
void mptcp_finish_connect(struct sock *sk);
-void __mptcp_set_connected(struct sock *sk);
+void __mptcp_sync_state(struct sock *sk, int state);
void mptcp_reset_tout_timer(struct mptcp_sock *msk, unsigned long fail_tout);
static inline void mptcp_stop_tout_timer(struct sock *sk)
@@ -1072,6 +1076,15 @@ static inline void __mptcp_do_fallback(struct mptcp_sock *msk)
set_bit(MPTCP_FALLBACK_DONE, &msk->flags);
}
+static inline bool __mptcp_has_initial_subflow(const struct mptcp_sock *msk)
+{
+ struct sock *ssk = READ_ONCE(msk->first);
+
+ return ssk && ((1 << inet_sk_state_load(ssk)) &
+ (TCPF_ESTABLISHED | TCPF_SYN_SENT |
+ TCPF_SYN_RECV | TCPF_LISTEN));
+}
+
static inline void mptcp_do_fallback(struct sock *ssk)
{
struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk);
@@ -1115,7 +1128,7 @@ static inline bool subflow_simultaneous_connect(struct sock *sk)
{
struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);
- return sk->sk_state == TCP_ESTABLISHED &&
+ return (1 << sk->sk_state) & (TCPF_ESTABLISHED | TCPF_FIN_WAIT1) &&
is_active_ssk(subflow) &&
!subflow->conn_finished;
}
diff --git a/net/mptcp/sockopt.c b/net/mptcp/sockopt.c
index 353680733700..c40f1428e602 100644
--- a/net/mptcp/sockopt.c
+++ b/net/mptcp/sockopt.c
@@ -440,6 +440,8 @@ static bool mptcp_supported_sockopt(int level, int optname)
/* should work fine */
case IP_FREEBIND:
case IP_TRANSPARENT:
+ case IP_BIND_ADDRESS_NO_PORT:
+ case IP_LOCAL_PORT_RANGE:
/* the following are control cmsg related */
case IP_PKTINFO:
@@ -455,7 +457,6 @@ static bool mptcp_supported_sockopt(int level, int optname)
/* common stuff that need some love */
case IP_TOS:
case IP_TTL:
- case IP_BIND_ADDRESS_NO_PORT:
case IP_MTU_DISCOVER:
case IP_RECVERR:
@@ -683,8 +684,8 @@ static int mptcp_setsockopt_sol_tcp_nodelay(struct mptcp_sock *msk, sockptr_t op
return 0;
}
-static int mptcp_setsockopt_sol_ip_set_transparent(struct mptcp_sock *msk, int optname,
- sockptr_t optval, unsigned int optlen)
+static int mptcp_setsockopt_sol_ip_set(struct mptcp_sock *msk, int optname,
+ sockptr_t optval, unsigned int optlen)
{
struct sock *sk = (struct sock *)msk;
struct sock *ssk;
@@ -710,6 +711,14 @@ static int mptcp_setsockopt_sol_ip_set_transparent(struct mptcp_sock *msk, int o
inet_assign_bit(TRANSPARENT, ssk,
inet_test_bit(TRANSPARENT, sk));
break;
+ case IP_BIND_ADDRESS_NO_PORT:
+ inet_assign_bit(BIND_ADDRESS_NO_PORT, ssk,
+ inet_test_bit(BIND_ADDRESS_NO_PORT, sk));
+ break;
+ case IP_LOCAL_PORT_RANGE:
+ WRITE_ONCE(inet_sk(ssk)->local_port_range,
+ READ_ONCE(inet_sk(sk)->local_port_range));
+ break;
default:
release_sock(sk);
WARN_ON_ONCE(1);
@@ -755,7 +764,9 @@ static int mptcp_setsockopt_v4(struct mptcp_sock *msk, int optname,
switch (optname) {
case IP_FREEBIND:
case IP_TRANSPARENT:
- return mptcp_setsockopt_sol_ip_set_transparent(msk, optname, optval, optlen);
+ case IP_BIND_ADDRESS_NO_PORT:
+ case IP_LOCAL_PORT_RANGE:
+ return mptcp_setsockopt_sol_ip_set(msk, optname, optval, optlen);
case IP_TOS:
return mptcp_setsockopt_v4_set_tos(msk, optname, optval, optlen);
}
@@ -938,6 +949,8 @@ void mptcp_diag_fill_info(struct mptcp_sock *msk, struct mptcp_info *info)
info->mptcpi_bytes_sent = msk->bytes_sent;
info->mptcpi_bytes_received = msk->bytes_received;
info->mptcpi_bytes_retrans = msk->bytes_retrans;
+ info->mptcpi_subflows_total = info->mptcpi_subflows +
+ __mptcp_has_initial_subflow(msk);
unlock_sock_fast(sk, slow);
}
EXPORT_SYMBOL_GPL(mptcp_diag_fill_info);
@@ -1348,6 +1361,12 @@ static int mptcp_getsockopt_v4(struct mptcp_sock *msk, int optname,
switch (optname) {
case IP_TOS:
return mptcp_put_int_option(msk, optval, optlen, READ_ONCE(inet_sk(sk)->tos));
+ case IP_BIND_ADDRESS_NO_PORT:
+ return mptcp_put_int_option(msk, optval, optlen,
+ inet_test_bit(BIND_ADDRESS_NO_PORT, sk));
+ case IP_LOCAL_PORT_RANGE:
+ return mptcp_put_int_option(msk, optval, optlen,
+ READ_ONCE(inet_sk(sk)->local_port_range));
}
return -EOPNOTSUPP;
@@ -1448,6 +1467,8 @@ static void sync_socket_options(struct mptcp_sock *msk, struct sock *ssk)
inet_assign_bit(TRANSPARENT, ssk, inet_test_bit(TRANSPARENT, sk));
inet_assign_bit(FREEBIND, ssk, inet_test_bit(FREEBIND, sk));
+ inet_assign_bit(BIND_ADDRESS_NO_PORT, ssk, inet_test_bit(BIND_ADDRESS_NO_PORT, sk));
+ WRITE_ONCE(inet_sk(ssk)->local_port_range, READ_ONCE(inet_sk(sk)->local_port_range));
}
void mptcp_sockopt_sync_locked(struct mptcp_sock *msk, struct sock *ssk)
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index a4f3c27f0309..3eacd04e7099 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -419,22 +419,28 @@ static bool subflow_use_different_dport(struct mptcp_sock *msk, const struct soc
return inet_sk(sk)->inet_dport != inet_sk((struct sock *)msk)->inet_dport;
}
-void __mptcp_set_connected(struct sock *sk)
+void __mptcp_sync_state(struct sock *sk, int state)
{
- __mptcp_propagate_sndbuf(sk, mptcp_sk(sk)->first);
+ struct mptcp_sock *msk = mptcp_sk(sk);
+
+ __mptcp_propagate_sndbuf(sk, msk->first);
if (sk->sk_state == TCP_SYN_SENT) {
- inet_sk_state_store(sk, TCP_ESTABLISHED);
+ mptcp_set_state(sk, state);
sk->sk_state_change(sk);
}
}
-static void mptcp_set_connected(struct sock *sk)
+static void mptcp_propagate_state(struct sock *sk, struct sock *ssk)
{
+ struct mptcp_sock *msk = mptcp_sk(sk);
+
mptcp_data_lock(sk);
- if (!sock_owned_by_user(sk))
- __mptcp_set_connected(sk);
- else
- __set_bit(MPTCP_CONNECTED, &mptcp_sk(sk)->cb_flags);
+ if (!sock_owned_by_user(sk)) {
+ __mptcp_sync_state(sk, ssk->sk_state);
+ } else {
+ msk->pending_state = ssk->sk_state;
+ __set_bit(MPTCP_SYNC_STATE, &msk->cb_flags);
+ }
mptcp_data_unlock(sk);
}
@@ -496,7 +502,7 @@ static void subflow_finish_connect(struct sock *sk, const struct sk_buff *skb)
subflow_set_remote_key(msk, subflow, &mp_opt);
MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_MPCAPABLEACTIVEACK);
mptcp_finish_connect(sk);
- mptcp_set_connected(parent);
+ mptcp_propagate_state(parent, sk);
} else if (subflow->request_join) {
u8 hmac[SHA256_DIGEST_SIZE];
@@ -540,7 +546,7 @@ static void subflow_finish_connect(struct sock *sk, const struct sk_buff *skb)
} else if (mptcp_check_fallback(sk)) {
fallback:
mptcp_rcv_space_init(msk, sk);
- mptcp_set_connected(parent);
+ mptcp_propagate_state(parent, sk);
}
return;
@@ -1740,7 +1746,7 @@ static void subflow_state_change(struct sock *sk)
mptcp_rcv_space_init(msk, sk);
pr_fallback(msk);
subflow->conn_finished = 1;
- mptcp_set_connected(parent);
+ mptcp_propagate_state(parent, sk);
}
/* as recvmsg() does not acquire the subflow socket for ssk selection
@@ -1976,6 +1982,17 @@ static void tcp_release_cb_override(struct sock *ssk)
tcp_release_cb(ssk);
}
+static int tcp_abort_override(struct sock *ssk, int err)
+{
+ /* closing a listener subflow requires a great deal of care.
+ * keep it simple and just prevent such operation
+ */
+ if (inet_sk_state_load(ssk) == TCP_LISTEN)
+ return -EINVAL;
+
+ return tcp_abort(ssk, err);
+}
+
static struct tcp_ulp_ops subflow_ulp_ops __read_mostly = {
.name = "mptcp",
.owner = THIS_MODULE,
@@ -2020,6 +2037,7 @@ void __init mptcp_subflow_init(void)
tcp_prot_override = tcp_prot;
tcp_prot_override.release_cb = tcp_release_cb_override;
+ tcp_prot_override.diag_destroy = tcp_abort_override;
#if IS_ENABLED(CONFIG_MPTCP_IPV6)
/* In struct mptcp_subflow_request_sock, we assume the TCP request sock
@@ -2055,6 +2073,7 @@ void __init mptcp_subflow_init(void)
tcpv6_prot_override = tcpv6_prot;
tcpv6_prot_override.release_cb = tcp_release_cb_override;
+ tcpv6_prot_override.diag_destroy = tcp_abort_override;
#endif
mptcp_diag_subflow_init(&subflow_ulp_ops);
diff --git a/net/mptcp/token_test.c b/net/mptcp/token_test.c
index 0758865ab658..bfff53e668da 100644
--- a/net/mptcp/token_test.c
+++ b/net/mptcp/token_test.c
@@ -143,3 +143,4 @@ static struct kunit_suite mptcp_token_suite = {
kunit_test_suite(mptcp_token_suite);
MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("KUnit tests for MPTCP Token");
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