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MINOR: connection: implement cs_drain_and_close()

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We had cs_close() which forces a CS_SHR_RESET mode on the read side,
and due to this there are a few call places in the checks which
perform a manual call to conn_sock_drain() before calling cs_close().
This is absurd by principle, and it can be counter-productive in the
case of a mux where this could even cause the opposite of the desired
effect by deleting pending frames on the socket before closing.

Let's add cs_drain_and_close() which uses the CS_SHR_DRAIN mode to
prepare this.
This commit is contained in:
Willy Tarreau 2020-12-11 11:04:51 +01:00
parent a5ea751922
commit 6aee5b9a4c
1 changed files with 8 additions and 0 deletions
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8
include/haproxy/connection.h
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@ -267,6 +267,14 @@ static inline void cs_close(struct conn_stream *cs)
cs->flags = CS_FL_NONE;
}
/* completely close a conn_stream after draining possibly pending data (but do not detach it) */
static inline void cs_drain_and_close(struct conn_stream *cs)
{
cs_shutw(cs, CS_SHW_SILENT);
cs_shutr(cs, CS_SHR_DRAIN);
cs->flags = CS_FL_NONE;
}
/* sets CS_FL_ERROR or CS_FL_ERR_PENDING on the cs */
static inline void cs_set_error(struct conn_stream *cs)
{