summaryrefslogtreecommitdiffstats
path: root/net/mptcp/protocol.h
diff options
context:
space:
mode:
Diffstat (limited to 'net/mptcp/protocol.h')
-rw-r--r--net/mptcp/protocol.h192
1 files changed, 156 insertions, 36 deletions
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index 13ab89dc1914..7cf9d110b85f 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -23,6 +23,7 @@
#define OPTION_MPTCP_ADD_ADDR BIT(6)
#define OPTION_MPTCP_ADD_ADDR6 BIT(7)
#define OPTION_MPTCP_RM_ADDR BIT(8)
+#define OPTION_MPTCP_FASTCLOSE BIT(9)
/* MPTCP option subtypes */
#define MPTCPOPT_MP_CAPABLE 0
@@ -49,15 +50,16 @@
#define TCPOLEN_MPTCP_DSS_MAP64 14
#define TCPOLEN_MPTCP_DSS_CHECKSUM 2
#define TCPOLEN_MPTCP_ADD_ADDR 16
-#define TCPOLEN_MPTCP_ADD_ADDR_PORT 18
+#define TCPOLEN_MPTCP_ADD_ADDR_PORT 20
#define TCPOLEN_MPTCP_ADD_ADDR_BASE 8
-#define TCPOLEN_MPTCP_ADD_ADDR_BASE_PORT 10
+#define TCPOLEN_MPTCP_ADD_ADDR_BASE_PORT 12
#define TCPOLEN_MPTCP_ADD_ADDR6 28
-#define TCPOLEN_MPTCP_ADD_ADDR6_PORT 30
+#define TCPOLEN_MPTCP_ADD_ADDR6_PORT 32
#define TCPOLEN_MPTCP_ADD_ADDR6_BASE 20
-#define TCPOLEN_MPTCP_ADD_ADDR6_BASE_PORT 22
-#define TCPOLEN_MPTCP_PORT_LEN 2
+#define TCPOLEN_MPTCP_ADD_ADDR6_BASE_PORT 24
+#define TCPOLEN_MPTCP_PORT_LEN 4
#define TCPOLEN_MPTCP_RM_ADDR_BASE 4
+#define TCPOLEN_MPTCP_FASTCLOSE 12
/* MPTCP MP_JOIN flags */
#define MPTCPOPT_BACKUP BIT(0)
@@ -86,11 +88,20 @@
/* MPTCP socket flags */
#define MPTCP_DATA_READY 0
-#define MPTCP_SEND_SPACE 1
+#define MPTCP_NOSPACE 1
#define MPTCP_WORK_RTX 2
#define MPTCP_WORK_EOF 3
#define MPTCP_FALLBACK_DONE 4
#define MPTCP_WORK_CLOSE_SUBFLOW 5
+#define MPTCP_PUSH_PENDING 6
+#define MPTCP_CLEAN_UNA 7
+
+static inline bool before64(__u64 seq1, __u64 seq2)
+{
+ return (__s64)(seq1 - seq2) < 0;
+}
+
+#define after64(seq2, seq1) before64(seq1, seq2)
struct mptcp_options_received {
u64 sndr_key;
@@ -101,6 +112,7 @@ struct mptcp_options_received {
u16 data_len;
u16 mp_capable : 1,
mp_join : 1,
+ fastclose : 1,
dss : 1,
add_addr : 1,
rm_addr : 1,
@@ -110,7 +122,7 @@ struct mptcp_options_received {
u32 token;
u32 nonce;
u64 thmac;
- u8 hmac[20];
+ u8 hmac[MPTCPOPT_HMAC_LEN];
u8 join_id;
u8 use_map:1,
dsn64:1,
@@ -153,11 +165,21 @@ struct mptcp_addr_info {
enum mptcp_pm_status {
MPTCP_PM_ADD_ADDR_RECEIVED,
+ MPTCP_PM_ADD_ADDR_SEND_ACK,
MPTCP_PM_RM_ADDR_RECEIVED,
MPTCP_PM_ESTABLISHED,
+ MPTCP_PM_ALREADY_ESTABLISHED, /* persistent status, set after ESTABLISHED event */
MPTCP_PM_SUBFLOW_ESTABLISHED,
};
+enum mptcp_addr_signal_status {
+ MPTCP_ADD_ADDR_SIGNAL,
+ MPTCP_ADD_ADDR_ECHO,
+ MPTCP_ADD_ADDR_IPV6,
+ MPTCP_ADD_ADDR_PORT,
+ MPTCP_RM_ADDR_SIGNAL,
+};
+
struct mptcp_pm_data {
struct mptcp_addr_info local;
struct mptcp_addr_info remote;
@@ -165,13 +187,11 @@ struct mptcp_pm_data {
spinlock_t lock; /*protects the whole PM data */
- bool add_addr_signal;
- bool rm_addr_signal;
+ u8 addr_signal;
bool server_side;
bool work_pending;
bool accept_addr;
bool accept_subflow;
- bool add_addr_echo;
u8 add_addr_signaled;
u8 add_addr_accepted;
u8 local_addr_used;
@@ -187,9 +207,10 @@ struct mptcp_pm_data {
struct mptcp_data_frag {
struct list_head list;
u64 data_seq;
- int data_len;
- int offset;
- int overhead;
+ u16 data_len;
+ u16 offset;
+ u16 overhead;
+ u16 already_sent;
struct page *page;
};
@@ -200,27 +221,40 @@ struct mptcp_sock {
u64 local_key;
u64 remote_key;
u64 write_seq;
+ u64 snd_nxt;
u64 ack_seq;
+ u64 rcv_wnd_sent;
u64 rcv_data_fin_seq;
+ int wmem_reserved;
struct sock *last_snd;
int snd_burst;
- atomic64_t snd_una;
+ int old_wspace;
+ u64 snd_una;
+ u64 wnd_end;
unsigned long timer_ival;
u32 token;
+ int rmem_pending;
+ int rmem_released;
unsigned long flags;
bool can_ack;
bool fully_established;
bool rcv_data_fin;
bool snd_data_fin_enable;
+ bool rcv_fastclose;
bool use_64bit_ack; /* Set when we received a 64-bit DSN */
spinlock_t join_list_lock;
+ struct sock *ack_hint;
struct work_struct work;
struct sk_buff *ooo_last_skb;
struct rb_root out_of_order_queue;
+ struct sk_buff_head receive_queue;
+ struct sk_buff_head skb_tx_cache; /* this is wmem accounted */
+ int tx_pending_data;
+ int size_goal_cache;
struct list_head conn_list;
struct list_head rtx_queue;
+ struct mptcp_data_frag *first_pending;
struct list_head join_list;
- struct skb_ext *cached_ext; /* for the next sendmsg */
struct socket *subflow; /* outgoing connect/listener/!mp_capable */
struct sock *first;
struct mptcp_pm_data pm;
@@ -232,6 +266,22 @@ struct mptcp_sock {
} rcvq_space;
};
+#define mptcp_lock_sock(___sk, cb) do { \
+ struct sock *__sk = (___sk); /* silence macro reuse warning */ \
+ might_sleep(); \
+ spin_lock_bh(&__sk->sk_lock.slock); \
+ if (__sk->sk_lock.owned) \
+ __lock_sock(__sk); \
+ cb; \
+ __sk->sk_lock.owned = 1; \
+ spin_unlock(&__sk->sk_lock.slock); \
+ mutex_acquire(&__sk->sk_lock.dep_map, 0, 0, _RET_IP_); \
+ local_bh_enable(); \
+} while (0)
+
+#define mptcp_data_lock(sk) spin_lock_bh(&(sk)->sk_lock.slock)
+#define mptcp_data_unlock(sk) spin_unlock_bh(&(sk)->sk_lock.slock)
+
#define mptcp_for_each_subflow(__msk, __subflow) \
list_for_each_entry(__subflow, &((__msk)->conn_list), node)
@@ -240,11 +290,46 @@ static inline struct mptcp_sock *mptcp_sk(const struct sock *sk)
return (struct mptcp_sock *)sk;
}
+static inline int __mptcp_space(const struct sock *sk)
+{
+ return tcp_space(sk) + READ_ONCE(mptcp_sk(sk)->rmem_pending);
+}
+
+static inline struct mptcp_data_frag *mptcp_send_head(const struct sock *sk)
+{
+ const struct mptcp_sock *msk = mptcp_sk(sk);
+
+ return READ_ONCE(msk->first_pending);
+}
+
+static inline struct mptcp_data_frag *mptcp_send_next(struct sock *sk)
+{
+ struct mptcp_sock *msk = mptcp_sk(sk);
+ struct mptcp_data_frag *cur;
+
+ cur = msk->first_pending;
+ return list_is_last(&cur->list, &msk->rtx_queue) ? NULL :
+ list_next_entry(cur, list);
+}
+
+static inline struct mptcp_data_frag *mptcp_pending_tail(const struct sock *sk)
+{
+ struct mptcp_sock *msk = mptcp_sk(sk);
+
+ if (!msk->first_pending)
+ return NULL;
+
+ if (WARN_ON_ONCE(list_empty(&msk->rtx_queue)))
+ return NULL;
+
+ return list_last_entry(&msk->rtx_queue, struct mptcp_data_frag, list);
+}
+
static inline struct mptcp_data_frag *mptcp_rtx_tail(const struct sock *sk)
{
struct mptcp_sock *msk = mptcp_sk(sk);
- if (list_empty(&msk->rtx_queue))
+ if (!before64(msk->snd_nxt, READ_ONCE(msk->snd_una)))
return NULL;
return list_last_entry(&msk->rtx_queue, struct mptcp_data_frag, list);
@@ -312,7 +397,8 @@ struct mptcp_subflow_context {
mpc_map : 1,
backup : 1,
rx_eof : 1,
- can_ack : 1; /* only after processing the remote a key */
+ can_ack : 1, /* only after processing the remote a key */
+ disposable : 1; /* ctx can be free at ulp release time */
enum mptcp_data_avail data_avail;
u32 remote_nonce;
u64 thmac;
@@ -361,15 +447,24 @@ mptcp_subflow_get_mapped_dsn(const struct mptcp_subflow_context *subflow)
return subflow->map_seq + mptcp_subflow_get_map_offset(subflow);
}
+static inline void mptcp_add_pending_subflow(struct mptcp_sock *msk,
+ struct mptcp_subflow_context *subflow)
+{
+ sock_hold(mptcp_subflow_tcp_sock(subflow));
+ spin_lock_bh(&msk->join_list_lock);
+ list_add_tail(&subflow->node, &msk->join_list);
+ spin_unlock_bh(&msk->join_list_lock);
+}
+
int mptcp_is_enabled(struct net *net);
+unsigned int mptcp_get_add_addr_timeout(struct net *net);
void mptcp_subflow_fully_established(struct mptcp_subflow_context *subflow,
struct mptcp_options_received *mp_opt);
bool mptcp_subflow_data_available(struct sock *sk);
void __init mptcp_subflow_init(void);
void mptcp_subflow_shutdown(struct sock *sk, struct sock *ssk, int how);
void __mptcp_close_ssk(struct sock *sk, struct sock *ssk,
- struct mptcp_subflow_context *subflow,
- long timeout);
+ struct mptcp_subflow_context *subflow);
void mptcp_subflow_reset(struct sock *ssk);
/* called with sk socket lock held */
@@ -407,9 +502,18 @@ static inline bool mptcp_is_fully_established(struct sock *sk)
void mptcp_rcv_space_init(struct mptcp_sock *msk, const struct sock *ssk);
void mptcp_data_ready(struct sock *sk, struct sock *ssk);
bool mptcp_finish_join(struct sock *sk);
-void mptcp_data_acked(struct sock *sk);
+bool mptcp_schedule_work(struct sock *sk);
+void __mptcp_wnd_updated(struct sock *sk, struct sock *ssk);
+void __mptcp_data_acked(struct sock *sk);
void mptcp_subflow_eof(struct sock *sk);
bool mptcp_update_rcv_data_fin(struct mptcp_sock *msk, u64 data_fin_seq, bool use_64bit);
+void __mptcp_flush_join_list(struct mptcp_sock *msk);
+static inline bool mptcp_data_fin_enabled(const struct mptcp_sock *msk)
+{
+ return READ_ONCE(msk->snd_data_fin_enable) &&
+ READ_ONCE(msk->write_seq) == READ_ONCE(msk->snd_nxt);
+}
+
void mptcp_destroy_common(struct mptcp_sock *msk);
void __init mptcp_token_init(void);
@@ -444,6 +548,7 @@ void mptcp_pm_subflow_established(struct mptcp_sock *msk,
void mptcp_pm_subflow_closed(struct mptcp_sock *msk, u8 id);
void mptcp_pm_add_addr_received(struct mptcp_sock *msk,
const struct mptcp_addr_info *addr);
+void mptcp_pm_add_addr_send_ack(struct mptcp_sock *msk);
void mptcp_pm_rm_addr_received(struct mptcp_sock *msk, u8 rm_id);
void mptcp_pm_free_anno_list(struct mptcp_sock *msk);
struct mptcp_pm_add_entry *
@@ -452,30 +557,51 @@ mptcp_pm_del_add_timer(struct mptcp_sock *msk,
int mptcp_pm_announce_addr(struct mptcp_sock *msk,
const struct mptcp_addr_info *addr,
- bool echo);
+ bool echo, bool port);
int mptcp_pm_remove_addr(struct mptcp_sock *msk, u8 local_id);
int mptcp_pm_remove_subflow(struct mptcp_sock *msk, u8 local_id);
static inline bool mptcp_pm_should_add_signal(struct mptcp_sock *msk)
{
- return READ_ONCE(msk->pm.add_addr_signal);
+ return READ_ONCE(msk->pm.addr_signal) & BIT(MPTCP_ADD_ADDR_SIGNAL);
+}
+
+static inline bool mptcp_pm_should_add_signal_echo(struct mptcp_sock *msk)
+{
+ return READ_ONCE(msk->pm.addr_signal) & BIT(MPTCP_ADD_ADDR_ECHO);
+}
+
+static inline bool mptcp_pm_should_add_signal_ipv6(struct mptcp_sock *msk)
+{
+ return READ_ONCE(msk->pm.addr_signal) & BIT(MPTCP_ADD_ADDR_IPV6);
+}
+
+static inline bool mptcp_pm_should_add_signal_port(struct mptcp_sock *msk)
+{
+ return READ_ONCE(msk->pm.addr_signal) & BIT(MPTCP_ADD_ADDR_PORT);
}
static inline bool mptcp_pm_should_rm_signal(struct mptcp_sock *msk)
{
- return READ_ONCE(msk->pm.rm_addr_signal);
+ return READ_ONCE(msk->pm.addr_signal) & BIT(MPTCP_RM_ADDR_SIGNAL);
}
-static inline unsigned int mptcp_add_addr_len(int family, bool echo)
+static inline unsigned int mptcp_add_addr_len(int family, bool echo, bool port)
{
- if (family == AF_INET)
- return echo ? TCPOLEN_MPTCP_ADD_ADDR_BASE
- : TCPOLEN_MPTCP_ADD_ADDR;
- return echo ? TCPOLEN_MPTCP_ADD_ADDR6_BASE : TCPOLEN_MPTCP_ADD_ADDR6;
+ u8 len = TCPOLEN_MPTCP_ADD_ADDR_BASE;
+
+ if (family == AF_INET6)
+ len = TCPOLEN_MPTCP_ADD_ADDR6_BASE;
+ if (!echo)
+ len += MPTCPOPT_THMAC_LEN;
+ if (port)
+ len += TCPOLEN_MPTCP_PORT_LEN;
+
+ return len;
}
bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
- struct mptcp_addr_info *saddr, bool *echo);
+ struct mptcp_addr_info *saddr, bool *echo, bool *port);
bool mptcp_pm_rm_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
u8 *rm_id);
int mptcp_pm_get_local_id(struct mptcp_sock *msk, struct sock_common *skc);
@@ -485,6 +611,7 @@ void mptcp_pm_nl_data_init(struct mptcp_sock *msk);
void mptcp_pm_nl_fully_established(struct mptcp_sock *msk);
void mptcp_pm_nl_subflow_established(struct mptcp_sock *msk);
void mptcp_pm_nl_add_addr_received(struct mptcp_sock *msk);
+void mptcp_pm_nl_add_addr_send_ack(struct mptcp_sock *msk);
void mptcp_pm_nl_rm_addr_received(struct mptcp_sock *msk);
void mptcp_pm_nl_rm_subflow_received(struct mptcp_sock *msk, u8 rm_id);
int mptcp_pm_nl_get_local_id(struct mptcp_sock *msk, struct sock_common *skc);
@@ -494,13 +621,6 @@ static inline struct mptcp_ext *mptcp_get_ext(struct sk_buff *skb)
return (struct mptcp_ext *)skb_ext_find(skb, SKB_EXT_MPTCP);
}
-static inline bool before64(__u64 seq1, __u64 seq2)
-{
- return (__s64)(seq1 - seq2) < 0;
-}
-
-#define after64(seq2, seq1) before64(seq1, seq2)
-
void mptcp_diag_subflow_init(struct tcp_ulp_ops *ops);
static inline bool __mptcp_check_fallback(const struct mptcp_sock *msk)
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-19 16:56:30 +0000