| Message ID | 20220629223550.655928-3-mathew.j.martineau@linux.intel.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
| Series | Locking fixes for subflow flag changes | expand |
| Context | Check | Description |
|---|---|---|
| matttbe/build | fail | Build error with: -Werror |
| matttbe/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 49 lines checked |
Hi Mat, Thank you for your modifications, that's great! But sadly, our CI spotted some issues with it when trying to build it. You can find more details there: https://patchwork.kernel.org/project/mptcp/patch/20220629223550.655928-3-mathew.j.martineau@linux.intel.com/ https://github.com/multipath-tcp/mptcp_net-next/actions/runs/2586322258 Status: failure Initiator: MPTCPimporter Commits: https://github.com/multipath-tcp/mptcp_net-next/commits/2c27d7a3c28d Feel free to reply to this email if you cannot access logs, if you need some support to fix the error, if this doesn't seem to be caused by your modifications or if the error is a false positive one. Cheers, MPTCP GH Action bot Bot operated by Matthieu Baerts (Tessares)
Hi Mat,
Thank you for your modifications, that's great!
Our CI did some validations and here is its report:
- {"code":404,"message":
- "Can't find artifacts containing file conclusion.txt"}:
- Task: https://cirrus-ci.com/task/4719806531239936
- Summary: https://api.cirrus-ci.com/v1/artifact/task/4719806531239936/summary/summary.txt
- {"code":404,"message":
- "Can't find artifacts containing file conclusion.txt"}:
- Task: https://cirrus-ci.com/task/5845706438082560
- Summary: https://api.cirrus-ci.com/v1/artifact/task/5845706438082560/summary/summary.txt
Initiator: Patchew Applier
Commits: https://github.com/multipath-tcp/mptcp_net-next/commits/2c27d7a3c28d
If there are some issues, you can reproduce them using the same environment as
the one used by the CI thanks to a docker image, e.g.:
$ cd [kernel source code]
$ docker run -v "${PWD}:${PWD}:rw" -w "${PWD}" --privileged --rm -it \
--pull always mptcp/mptcp-upstream-virtme-docker:latest \
auto-debug
For more details:
https://github.com/multipath-tcp/mptcp-upstream-virtme-docker
Please note that despite all the efforts that have been already done to have a
stable tests suite when executed on a public CI like here, it is possible some
reported issues are not due to your modifications. Still, do not hesitate to
help us improve that ;-)
Cheers,
MPTCP GH Action bot
Bot operated by Matthieu Baerts (Tessares)
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index 936d72359c46..04bae2d38b5b 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -729,11 +729,13 @@ static int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk, struct sock *ssk = mptcp_subflow_tcp_sock(subflow); struct sock *sk = (struct sock *)msk; struct mptcp_addr_info local; + bool slow; local_address((struct sock_common *)ssk, &local); if (!mptcp_addresses_equal(&local, addr, addr->port)) continue; + slow = lock_sock_fast(ssk); if (subflow->backup != bkup) msk->last_snd = NULL; subflow->backup = bkup; @@ -741,7 +743,8 @@ static int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk, subflow->request_bkup = bkup; pr_debug("send ack for mp_prio"); - mptcp_subflow_send_ack(ssk); + __mptcp_subflow_send_ack(ssk); + unlock_sock_fast(ssk, slow); return 0; } diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 3efbae948707..b96a80c8e22a 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -506,13 +506,18 @@ static inline bool tcp_can_send_ack(const struct sock *ssk) (TCPF_SYN_SENT | TCPF_SYN_RECV | TCPF_TIME_WAIT | TCPF_CLOSE | TCPF_LISTEN)); } +void __mptcp_subflow_send_ack(struct sock *ssk) +{ + if (tcp_can_send_ack(ssk)) + tcp_send_ack(ssk); +} + void mptcp_subflow_send_ack(struct sock *ssk) { bool slow; slow = lock_sock_fast(ssk); - if (tcp_can_send_ack(ssk)) - tcp_send_ack(ssk); + __mptcp_subflow_send_ack(ssk); unlock_sock_fast(ssk, slow); } diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index c14d70c036d0..033c995772dc 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -607,6 +607,7 @@ 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); +void __mptcp_subflow_send_ack(struct sock *ssk); void mptcp_subflow_send_ack(struct sock *ssk); void mptcp_subflow_reset(struct sock *ssk); void mptcp_subflow_queue_clean(struct sock *ssk);
When setting up a subflow's flags for sending MP_PRIO MPTCP options, the subflow socket lock was not held while reading and modifying several struct members that are also read and modified in mptcp_write_options(). Acquire the subflow socket lock earlier and send the MP_PRIO ACK with that lock already acquired. Add a new variant of the mptcp_subflow_send_ack() helper to use with the subflow lock held. v2: Squashed helper function commit Fixes: 067065422fcd ("mptcp: add the outgoing MP_PRIO support") Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> --- net/mptcp/pm_netlink.c | 5 ++++- net/mptcp/protocol.c | 9 +++++++-- net/mptcp/protocol.h | 1 + 3 files changed, 12 insertions(+), 3 deletions(-)