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/*
* 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/obj_type.h>
#include <proto/stick_table.h>
#include <proto/server.h>
extern struct pool_head *pool_head_session;
extern struct pool_head *pool_head_sess_srv_list;
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);
if (stktable_data_cast(ptr, conn_cur) > 0)
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);
}
}
/* Remove the connection from the session list, and destroy the srv_list if it's now empty */
static inline void session_unown_conn(struct session *sess, struct connection *conn)
{
struct sess_srv_list *srv_list = NULL;
LIST_DEL(&conn->session_list);
LIST_INIT(&conn->session_list);
list_for_each_entry(srv_list, &sess->srv_list, srv_list) {
if (srv_list->target == conn->target) {
if (LIST_ISEMPTY(&srv_list->conn_list)) {
LIST_DEL(&srv_list->srv_list);
pool_free(pool_head_sess_srv_list, srv_list);
}
break;
}
}
}
static inline int session_add_conn(struct session *sess, struct connection *conn, void *target)
{
struct sess_srv_list *srv_list = NULL;
int found = 0;
list_for_each_entry(srv_list, &sess->srv_list, srv_list) {
if (srv_list->target == target) {
found = 1;
break;
}
}
if (!found) {
/* The session has no connection for the server, create a new entry */
srv_list = pool_alloc(pool_head_sess_srv_list);
if (!srv_list)
return 0;
srv_list->target = target;
LIST_INIT(&srv_list->conn_list);
LIST_ADDQ(&sess->srv_list, &srv_list->srv_list);
}
LIST_ADDQ(&srv_list->conn_list, &conn->session_list);
return 1;
}
/* Returns 0 if the session can keep the idle conn, -1 if it was destroyed, or 1 if it was added to the server list */
static inline int session_check_idle_conn(struct session *sess, struct connection *conn)
{
if (sess->idle_conns >= sess->fe->max_out_conns) {
/* We can't keep the connection, let's try to add it to the server idle list */
session_unown_conn(sess, conn);
conn->owner = NULL;
conn->flags &= ~CO_FL_SESS_IDLE;
if (!srv_add_to_idle_list(objt_server(conn->target), conn)) {
/* The server doesn't want it, let's kill the connection right away */
conn->mux->destroy(conn->ctx);
return -1;
}
return 1;
} else {
conn->flags |= CO_FL_SESS_IDLE;
sess->idle_conns++;
}
return 0;
}
#endif /* _PROTO_SESSION_H */
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/