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mptcp: add accounting for pending data 

Preparation patch to track the data pending in the msk
write queue. No functional change introduced here

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Paolo Abeni 2020-11-16 10:48:07 +01:00 committed by Jakub Kicinski
parent caf971df01
commit f0e6a4cf11
2 changed files with 36 additions and 3 deletions
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1
net/mptcp/protocol.c
View File

@ -1859,6 +1859,7 @@ static int __mptcp_init_sock(struct sock *sk)
__set_bit(MPTCP_SEND_SPACE, &msk->flags);
INIT_WORK(&msk->work, mptcp_worker);
msk->out_of_order_queue = RB_ROOT;
msk->first_pending = NULL;
msk->first = NULL;
inet_csk(sk)->icsk_sync_mss = mptcp_sync_mss;

38
net/mptcp/protocol.h
View File

@ -187,9 +187,10 @@ 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;
};
@ -219,6 +220,7 @@ struct mptcp_sock {
struct rb_root out_of_order_queue;
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 */
@ -240,6 +242,36 @@ static inline struct mptcp_sock *mptcp_sk(const struct sock *sk)
return (struct mptcp_sock *)sk;
}
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);