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BUG/MEDIUM: stream_interface: Don't add SI_FL_ERR the state is < SI_ST_CON.

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Only add SI_FL_ERR if the stream_interface is connected, or is attempting
a connection. We may get there because the stream_interface's tasklet
was woken up, but before it actually runs, process_stream() may be called,
detect that there were an error, and change the state of the stream_interface
to SI_ST_TAR. When the stream_interface's tasklet then run, the connection
may still have CO_FL_ERROR, but that error was already accounted for, so
just ignore it.

This should be backported to 2.0.
This commit is contained in:
Olivier Houchard 2019-06-24 16:08:08 +02:00 committed by Olivier Houchard
parent 16866670dd
commit c31e2cbd28
1 changed files with 17 additions and 2 deletions
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19
src/stream_interface.c
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@ -588,8 +588,14 @@ static int si_cs_process(struct conn_stream *cs)
/* First step, report to the stream-int what was detected at the
* connection layer : errors and connection establishment.
* Only add SI_FL_ERR if we're connected, or we're attempting to
* connect, we may get there because we got woken up, but only run
* after process_stream() noticed there were an error, and decided
* to retry to connect, the connection may still have CO_FL_ERROR,
* and we don't want to add SI_FL_ERR back
*/
if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
if (si->state >= SI_ST_CON &&
(conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR))
si->flags |= SI_FL_ERR;
/* If we had early data, and the handshake ended, then
@ -645,6 +651,14 @@ int si_cs_send(struct conn_stream *cs)
return 0;
if (conn->flags & CO_FL_ERROR || cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING)) {
/* We're probably there because the tasklet was woken up,
* but process_stream() ran before, detected there were an
* error and put the si back to SI_ST_TAR. There's still
* CO_FL_ERROR on the connection but we don't want to add
* SI_FL_ERR back, so give up
*/
if (si->state < SI_ST_CON)
return 0;
si->flags |= SI_FL_ERR;
return 1;
}
@ -1126,7 +1140,8 @@ static void stream_int_chk_snd_conn(struct stream_interface *si)
if (cs->flags & (CS_FL_ERROR|CS_FL_ERR_PENDING) || cs->conn->flags & CO_FL_ERROR) {
/* Write error on the file descriptor */
si->flags |= SI_FL_ERR;
if (si->state >= SI_ST_CON)
si->flags |= SI_FL_ERR;
goto out_wakeup;
}