diff options
| author | Paolo Abeni <pabeni@redhat.com> | 2020-11-27 13:10:22 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-12-01 04:55:23 +0300 |
| commit | ad80b0fc6e7f56bb1b09af86749ff3014477cfe6 (patch) | |
| tree | 607bccd7a619c87713dd56b97ae6124b90e89070 /net | |
| parent | be5724240b390b1192635d942d4bd3df57bb6e3c (diff) | |
| download | linux-ad80b0fc6e7f56bb1b09af86749ff3014477cfe6.tar.xz | |
mptcp: open code mptcp variant for lock_sock
This allows invoking an additional callback under the
socket spin lock.
Will be used by the next patches to avoid additional
spin lock contention.
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/sock.c | 2 | ||||
| -rw-r--r-- | net/mptcp/protocol.h | 13 |
2 files changed, 14 insertions, 1 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index 9badbe7bb4e4..f0f096852876 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -2486,7 +2486,7 @@ bool sk_page_frag_refill(struct sock *sk, struct page_frag *pfrag) } EXPORT_SYMBOL(sk_page_frag_refill); -static void __lock_sock(struct sock *sk) +void __lock_sock(struct sock *sk) __releases(&sk->sk_lock.slock) __acquires(&sk->sk_lock.slock) { diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 82d5626323b1..6abac8238de3 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -253,6 +253,19 @@ 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_for_each_subflow(__msk, __subflow) \ list_for_each_entry(__subflow, &((__msk)->conn_list), node) |