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Clone the csock in accept_connection(), not in callback

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If we clone the csock (children socket) in TCP accept_connection()
instead of passing the ssock (server socket) to the call back and
cloning it there we unbreak the assumption that every socket is handled
inside it's own worker thread and therefore we can get rid of (at least)
callback locking.
This commit is contained in:
Ondřej Surý
2020-09-18 12:27:40 +02:00
committed by Ondřej Surý
parent d86a74d8a4
commit e8b56acb49
4 changed files with 42 additions and 62 deletions
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7
lib/isc/netmgr/udp.c
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@@ -379,12 +379,7 @@ udp_recv_cb(uv_udp_t *handle, ssize_t nrecv, const uv_buf_t *buf,
region.base = (unsigned char *)buf->base;
region.length = nrecv;
/*
* In tcp.c and tcpdns.c, this would need to be locked
* by sock->lock because callbacks may be set to NULL
* unexpectedly when the connection drops, but that isn't
* a factor in the UDP case.
*/
INSIST(sock->tid == isc_nm_tid());
INSIST(sock->recv_cb != NULL);
cb = sock->recv_cb;
cbarg = sock->recv_cbarg;