haproxy/include/proto/session.h

123 lines
3.3 KiB
C

/*
* include/proto/session.h
* This file defines everything related to sessions.
*
* Copyright (C) 2000-2015 Willy Tarreau - w@1wt.eu
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, version 2.1
* exclusively.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _PROTO_SESSION_H
#define _PROTO_SESSION_H
#include <common/config.h>
#include <common/buffer.h>
#include <common/debug.h>
#include <common/memory.h>
#include <types/global.h>
#include <types/session.h>
#include <proto/stick_table.h>
extern struct pool_head *pool_head_session;
struct session *session_new(struct proxy *fe, struct listener *li, enum obj_type *origin);
void session_free(struct session *sess);
int session_accept_fd(struct listener *l, int cfd, struct sockaddr_storage *addr);
/* Remove the refcount from the session to the tracked counters, and clear the
* pointer to ensure this is only performed once. The caller is responsible for
* ensuring that the pointer is valid first.
*/
static inline void session_store_counters(struct session *sess)
{
void *ptr;
int i;
struct stksess *ts;
for (i = 0; i < MAX_SESS_STKCTR; i++) {
struct stkctr *stkctr = &sess->stkctr[i];
ts = stkctr_entry(stkctr);
if (!ts)
continue;
ptr = stktable_data_ptr(stkctr->table, ts, STKTABLE_DT_CONN_CUR);
if (ptr) {
HA_RWLOCK_WRLOCK(STK_SESS_LOCK, &ts->lock);
stktable_data_cast(ptr, conn_cur)--;
HA_RWLOCK_WRUNLOCK(STK_SESS_LOCK, &ts->lock);
/* If data was modified, we need to touch to re-schedule sync */
stktable_touch_local(stkctr->table, ts, 0);
}
stkctr_set_entry(stkctr, NULL);
stksess_kill_if_expired(stkctr->table, ts, 1);
}
}
static inline void session_add_conn(struct session *sess, struct connection *conn, void *target)
{
int avail = -1;
int i;
for (i = 0; i < MAX_SRV_LIST; i++) {
if (sess->srv_list[i].target == target) {
avail = i;
break;
}
if (LIST_ISEMPTY(&sess->srv_list[i].list) && avail == -1)
avail = i;
}
if (avail == -1) {
struct connection *conn, *conn_back;
int count = 0;
/* We have no slot free, let's free the one with the fewer connections */
for (i = 0; i < MAX_SRV_LIST; i++) {
int count_list = 0;
list_for_each_entry(conn, &sess->srv_list[i].list, session_list)
count_list++;
if (count == 0 || count_list < count) {
count = count_list;
avail = i;
}
}
/* Now unown all the connections */
list_for_each_entry_safe(conn, conn_back, &sess->srv_list[avail].list, session_list) {
conn->owner = NULL;
LIST_DEL(&conn->session_list);
LIST_INIT(&conn->session_list);
if (conn->mux)
conn->mux->destroy(conn);
}
}
sess->srv_list[avail].target = target;
LIST_ADDQ(&sess->srv_list[avail].list, &conn->session_list);
}
#endif /* _PROTO_SESSION_H */
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/