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MEDIUM: stream: move all the session-specific stuff of stream_accept() earlier

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Since the tcp-request connection rules don't need the stream anymore, we
can safely move the session-specific stuff earlier and prepare for a split
of session and stream initialization. Some work remains to be done.
This commit is contained in:
Willy Tarreau 2015-04-04 16:55:53 +02:00
parent 1df0cc6466
commit 5ecb069c58
1 changed files with 55 additions and 53 deletions
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108
src/stream.c
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@ -98,10 +98,25 @@ int stream_accept(struct listener *l, int cfd, struct sockaddr_storage *addr)
cli_conn->target = &l->obj_type;
cli_conn->proxy_netns = l->netns;
conn_ctrl_init(cli_conn);
/* wait for a PROXY protocol header */
if (l->options & LI_O_ACC_PROXY) {
cli_conn->flags |= CO_FL_ACCEPT_PROXY;
conn_sock_want_recv(cli_conn);
}
sess = pool_alloc2(pool2_session);
if (!sess)
goto out_free_conn;
p->feconn++;
/* This session was accepted, count it now */
if (p->feconn > p->fe_counters.conn_max)
p->fe_counters.conn_max = p->feconn;
proxy_inc_fe_conn_ctr(l, p);
sess->listener = l;
sess->fe = p;
sess->origin = &cli_conn->obj_type;
@ -109,6 +124,45 @@ int stream_accept(struct listener *l, int cfd, struct sockaddr_storage *addr)
sess->tv_accept = now; /* corrected date for internal use */
memset(sess->stkctr, 0, sizeof(sess->stkctr));
/* now evaluate the tcp-request layer4 rules. Since we expect to be able
* to abort right here as soon as possible, we check the rules before
* even initializing the stream interfaces.
*/
if ((l->options & LI_O_TCP_RULES) && !tcp_exec_req_rules(sess)) {
/* let's do a no-linger now to close with a single RST. */
setsockopt(cfd, SOL_SOCKET, SO_LINGER, (struct linger *) &nolinger, sizeof(struct linger));
ret = 0; /* successful termination */
goto out_free_sess;
}
/* monitor-net and health mode are processed immediately after TCP
* connection rules. This way it's possible to block them, but they
* never use the lower data layers, they send directly over the socket,
* as they were designed for. We first flush the socket receive buffer
* in order to avoid emission of an RST by the system. We ignore any
* error.
*/
if (unlikely((p->mode == PR_MODE_HEALTH) ||
((l->options & LI_O_CHK_MONNET) &&
addr->ss_family == AF_INET &&
(((struct sockaddr_in *)addr)->sin_addr.s_addr & p->mon_mask.s_addr) == p->mon_net.s_addr))) {
/* we have 4 possibilities here :
* - HTTP mode, from monitoring address => send "HTTP/1.0 200 OK"
* - HEALTH mode with HTTP check => send "HTTP/1.0 200 OK"
* - HEALTH mode without HTTP check => just send "OK"
* - TCP mode from monitoring address => just close
*/
if (l->proto->drain)
l->proto->drain(cfd);
if (p->mode == PR_MODE_HTTP ||
(p->mode == PR_MODE_HEALTH && (p->options2 & PR_O2_CHK_ANY) == PR_O2_HTTP_CHK))
send(cfd, "HTTP/1.0 200 OK\r\n\r\n", 19, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_MORE);
else if (p->mode == PR_MODE_HEALTH)
send(cfd, "OK\n", 3, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_MORE);
ret = 0;
goto out_free_sess;
}
if (unlikely((s = pool_alloc2(pool2_stream)) == NULL))
goto out_free_sess;
@ -136,12 +190,6 @@ int stream_accept(struct listener *l, int cfd, struct sockaddr_storage *addr)
s->logs.accept_date = sess->accept_date; /* user-visible date for logging */
s->logs.tv_accept = sess->tv_accept; /* corrected date for internal use */
s->uniq_id = global.req_count++;
p->feconn++;
/* This stream was accepted, count it now */
if (p->feconn > p->fe_counters.conn_max)
p->fe_counters.conn_max = p->feconn;
proxy_inc_fe_conn_ctr(l, p);
/* Add the minimum callbacks to prepare the connection's control layer.
* We need this so that we can safely execute the ACLs used by the
@ -151,52 +199,6 @@ int stream_accept(struct listener *l, int cfd, struct sockaddr_storage *addr)
*/
si_attach_conn(&s->si[0], cli_conn);
conn_attach(cli_conn, s, &sess_conn_cb);
conn_ctrl_init(cli_conn);
/* now evaluate the tcp-request layer4 rules. Since we expect to be able
* to abort right here as soon as possible, we check the rules before
* even initializing the stream interfaces.
*/
if ((l->options & LI_O_TCP_RULES) && !tcp_exec_req_rules(sess)) {
/* let's do a no-linger now to close with a single RST. */
setsockopt(cfd, SOL_SOCKET, SO_LINGER, (struct linger *) &nolinger, sizeof(struct linger));
ret = 0; /* successful termination */
goto out_free_strm;
}
/* monitor-net and health mode are processed immediately after TCP
* connection rules. This way it's possible to block them, but they
* never use the lower data layers, they send directly over the socket,
* as they were designed for. We first flush the socket receive buffer
* in order to avoid emission of an RST by the system. We ignore any
* error.
*/
if (unlikely((p->mode == PR_MODE_HEALTH) ||
((l->options & LI_O_CHK_MONNET) &&
addr->ss_family == AF_INET &&
(((struct sockaddr_in *)addr)->sin_addr.s_addr & p->mon_mask.s_addr) == p->mon_net.s_addr))) {
/* we have 4 possibilities here :
* - HTTP mode, from monitoring address => send "HTTP/1.0 200 OK"
* - HEALTH mode with HTTP check => send "HTTP/1.0 200 OK"
* - HEALTH mode without HTTP check => just send "OK"
* - TCP mode from monitoring address => just close
*/
if (l->proto->drain)
l->proto->drain(cfd);
if (p->mode == PR_MODE_HTTP ||
(p->mode == PR_MODE_HEALTH && (p->options2 & PR_O2_CHK_ANY) == PR_O2_HTTP_CHK))
send(cfd, "HTTP/1.0 200 OK\r\n\r\n", 19, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_MORE);
else if (p->mode == PR_MODE_HEALTH)
send(cfd, "OK\n", 3, MSG_DONTWAIT|MSG_NOSIGNAL|MSG_MORE);
ret = 0;
goto out_free_strm;
}
/* wait for a PROXY protocol header */
if (l->options & LI_O_ACC_PROXY) {
cli_conn->flags |= CO_FL_ACCEPT_PROXY;
conn_sock_want_recv(cli_conn);
}
if (unlikely((t = task_new()) == NULL))
goto out_free_strm;
@ -237,9 +239,9 @@ int stream_accept(struct listener *l, int cfd, struct sockaddr_storage *addr)
out_free_task:
task_free(t);
out_free_strm:
p->feconn--;
pool_free2(pool2_stream, s);
out_free_sess:
p->feconn--;
session_free(sess);
out_free_conn:
cli_conn->flags &= ~CO_FL_XPRT_TRACKED;