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mptcp: preserve const qualifier in mptcp_sk() 

We can change mptcp_sk() to propagate its argument const qualifier,
thanks to container_of_const().

We need to change few things to avoid build errors:

mptcp_set_datafin_timeout() and mptcp_rtx_head() have to accept
non-const sk pointers.

@msk local variable in mptcp_pending_tail() must be const.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Matthieu Baerts <matthieu.baerts@tessares.net>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2023-03-17 15:55:38 +00:00 committed by David S. Miller
parent c7154ca8e0
commit 403a40f230
2 changed files with 4 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/mptcp/protocol.c
View File

@ -459,7 +459,7 @@ static bool mptcp_pending_data_fin(struct sock *sk, u64 *seq)
return false;
}
static void mptcp_set_datafin_timeout(const struct sock *sk)
static void mptcp_set_datafin_timeout(struct sock *sk)
{
struct inet_connection_sock *icsk = inet_csk(sk);
u32 retransmits;

9
net/mptcp/protocol.h
View File

@ -334,10 +334,7 @@ static inline void msk_owned_by_me(const struct mptcp_sock *msk)
sock_owned_by_me((const struct sock *)msk);
}
static inline struct mptcp_sock *mptcp_sk(const struct sock *sk)
{
return (struct mptcp_sock *)sk;
}
#define mptcp_sk(ptr) container_of_const(ptr, struct mptcp_sock, sk.icsk_inet.sk)
/* the msk socket don't use the backlog, also account for the bulk
* free memory
@ -371,7 +368,7 @@ static inline struct mptcp_data_frag *mptcp_send_next(struct sock *sk)
static inline struct mptcp_data_frag *mptcp_pending_tail(const struct sock *sk)
{
struct mptcp_sock *msk = mptcp_sk(sk);
const struct mptcp_sock *msk = mptcp_sk(sk);
if (!msk->first_pending)
return NULL;
@ -382,7 +379,7 @@ static inline struct mptcp_data_frag *mptcp_pending_tail(const struct sock *sk)
return list_last_entry(&msk->rtx_queue, struct mptcp_data_frag, list);
}
static inline struct mptcp_data_frag *mptcp_rtx_head(const struct sock *sk)
static inline struct mptcp_data_frag *mptcp_rtx_head(struct sock *sk)
{
struct mptcp_sock *msk = mptcp_sk(sk);