[LLC]: Add sysctl support for the LLC timeouts
Signed-off-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 3a29a9f..fc8e367 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -202,7 +202,8 @@
NET_TR=14,
NET_DECNET=15,
NET_ECONET=16,
- NET_SCTP=17,
+ NET_SCTP=17,
+ NET_LLC=18,
};
/* /proc/sys/kernel/random */
@@ -522,6 +523,29 @@
NET_IPX_FORWARDING=2
};
+/* /proc/sys/net/llc */
+enum {
+ NET_LLC2=1,
+ NET_LLC_STATION=2,
+};
+
+/* /proc/sys/net/llc/llc2 */
+enum {
+ NET_LLC2_TIMEOUT=1,
+};
+
+/* /proc/sys/net/llc/station */
+enum {
+ NET_LLC_STATION_ACK_TIMEOUT=1,
+};
+
+/* /proc/sys/net/llc/llc2/timeout */
+enum {
+ NET_LLC2_ACK_TIMEOUT=1,
+ NET_LLC2_P_TIMEOUT=2,
+ NET_LLC2_REJ_TIMEOUT=3,
+ NET_LLC2_BUSY_TIMEOUT=4,
+};
/* /proc/sys/net/appletalk */
enum {
diff --git a/include/net/llc.h b/include/net/llc.h
index 71769a5..8b8e2be 100644
--- a/include/net/llc.h
+++ b/include/net/llc.h
@@ -98,4 +98,11 @@
#define llc_proc_init() (0)
#define llc_proc_exit() do { } while(0)
#endif /* CONFIG_PROC_FS */
+#ifdef CONFIG_SYSCTL
+extern int llc_sysctl_init(void);
+extern void llc_sysctl_exit(void);
+#else
+#define llc_sysctl_init() (0)
+#define llc_sysctl_exit() do { } while(0)
+#endif /* CONFIG_SYSCTL */
#endif /* LLC_H */
diff --git a/include/net/llc_conn.h b/include/net/llc_conn.h
index 8ad3bc2..8a8ff48 100644
--- a/include/net/llc_conn.h
+++ b/include/net/llc_conn.h
@@ -19,14 +19,14 @@
#define LLC_EVENT 1
#define LLC_PACKET 2
-#define LLC_P_TIME 2
-#define LLC_ACK_TIME 1
-#define LLC_REJ_TIME 3
-#define LLC_BUSY_TIME 3
+#define LLC2_P_TIME 2
+#define LLC2_ACK_TIME 1
+#define LLC2_REJ_TIME 3
+#define LLC2_BUSY_TIME 3
struct llc_timer {
struct timer_list timer;
- u16 expire; /* timer expire time */
+ unsigned long expire; /* timer expire time */
};
struct llc_sock {
diff --git a/net/llc/Makefile b/net/llc/Makefile
index 5ebd4ed..4e260cf 100644
--- a/net/llc/Makefile
+++ b/net/llc/Makefile
@@ -22,3 +22,4 @@
llc_sap.o llc_s_ac.o llc_s_ev.o llc_s_st.o af_llc.o llc_station.o
llc2-$(CONFIG_PROC_FS) += llc_proc.o
+llc2-$(CONFIG_SYSCTL) += sysctl_net_llc.o
diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c
index 95444f2..ef12534 100644
--- a/net/llc/af_llc.c
+++ b/net/llc/af_llc.c
@@ -877,22 +877,22 @@
case LLC_OPT_ACK_TMR_EXP:
if (opt > LLC_OPT_MAX_ACK_TMR_EXP)
goto out;
- llc->ack_timer.expire = opt;
+ llc->ack_timer.expire = opt * HZ;
break;
case LLC_OPT_P_TMR_EXP:
if (opt > LLC_OPT_MAX_P_TMR_EXP)
goto out;
- llc->pf_cycle_timer.expire = opt;
+ llc->pf_cycle_timer.expire = opt * HZ;
break;
case LLC_OPT_REJ_TMR_EXP:
if (opt > LLC_OPT_MAX_REJ_TMR_EXP)
goto out;
- llc->rej_sent_timer.expire = opt;
+ llc->rej_sent_timer.expire = opt * HZ;
break;
case LLC_OPT_BUSY_TMR_EXP:
if (opt > LLC_OPT_MAX_BUSY_TMR_EXP)
goto out;
- llc->busy_state_timer.expire = opt;
+ llc->busy_state_timer.expire = opt * HZ;
break;
case LLC_OPT_TX_WIN:
if (opt > LLC_OPT_MAX_WIN)
@@ -942,17 +942,17 @@
goto out;
switch (optname) {
case LLC_OPT_RETRY:
- val = llc->n2; break;
+ val = llc->n2; break;
case LLC_OPT_SIZE:
- val = llc->n1; break;
+ val = llc->n1; break;
case LLC_OPT_ACK_TMR_EXP:
- val = llc->ack_timer.expire; break;
+ val = llc->ack_timer.expire / HZ; break;
case LLC_OPT_P_TMR_EXP:
- val = llc->pf_cycle_timer.expire; break;
+ val = llc->pf_cycle_timer.expire / HZ; break;
case LLC_OPT_REJ_TMR_EXP:
- val = llc->rej_sent_timer.expire; break;
+ val = llc->rej_sent_timer.expire / HZ; break;
case LLC_OPT_BUSY_TMR_EXP:
- val = llc->busy_state_timer.expire; break;
+ val = llc->busy_state_timer.expire / HZ; break;
case LLC_OPT_TX_WIN:
val = llc->k; break;
case LLC_OPT_RX_WIN:
@@ -999,6 +999,13 @@
extern void llc_sap_handler(struct llc_sap *sap, struct sk_buff *skb);
extern void llc_conn_handler(struct llc_sap *sap, struct sk_buff *skb);
+static char llc_proc_err_msg[] __initdata =
+ KERN_CRIT "LLC: Unable to register the proc_fs entries\n";
+static char llc_sysctl_err_msg[] __initdata =
+ KERN_CRIT "LLC: Unable to register the sysctl entries\n";
+static char llc_sock_err_msg[] __initdata =
+ KERN_CRIT "LLC: Unable to register the network family\n";
+
static int __init llc2_init(void)
{
int rc = proto_register(&llc_proto, 0);
@@ -1010,13 +1017,28 @@
llc_station_init();
llc_ui_sap_last_autoport = LLC_SAP_DYN_START;
rc = llc_proc_init();
- if (rc != 0)
+ if (rc != 0) {
+ printk(llc_proc_err_msg);
goto out_unregister_llc_proto;
- sock_register(&llc_ui_family_ops);
+ }
+ rc = llc_sysctl_init();
+ if (rc) {
+ printk(llc_sysctl_err_msg);
+ goto out_proc;
+ }
+ rc = sock_register(&llc_ui_family_ops);
+ if (rc) {
+ printk(llc_sock_err_msg);
+ goto out_sysctl;
+ }
llc_add_pack(LLC_DEST_SAP, llc_sap_handler);
llc_add_pack(LLC_DEST_CONN, llc_conn_handler);
out:
return rc;
+out_sysctl:
+ llc_sysctl_exit();
+out_proc:
+ llc_proc_exit();
out_unregister_llc_proto:
proto_unregister(&llc_proto);
goto out;
@@ -1029,6 +1051,7 @@
llc_remove_pack(LLC_DEST_CONN);
sock_unregister(PF_LLC);
llc_proc_exit();
+ llc_sysctl_exit();
proto_unregister(&llc_proto);
}
diff --git a/net/llc/llc_c_ac.c b/net/llc/llc_c_ac.c
index 50c827e..a4daa91 100644
--- a/net/llc/llc_c_ac.c
+++ b/net/llc/llc_c_ac.c
@@ -620,7 +620,7 @@
if (!llc->remote_busy_flag) {
llc->remote_busy_flag = 1;
mod_timer(&llc->busy_state_timer.timer,
- jiffies + llc->busy_state_timer.expire * HZ);
+ jiffies + llc->busy_state_timer.expire);
}
return 0;
}
@@ -853,7 +853,7 @@
llc_conn_set_p_flag(sk, 1);
mod_timer(&llc->pf_cycle_timer.timer,
- jiffies + llc->pf_cycle_timer.expire * HZ);
+ jiffies + llc->pf_cycle_timer.expire);
return 0;
}
@@ -1131,7 +1131,7 @@
{
struct llc_sock *llc = llc_sk(sk);
- mod_timer(&llc->ack_timer.timer, jiffies + llc->ack_timer.expire * HZ);
+ mod_timer(&llc->ack_timer.timer, jiffies + llc->ack_timer.expire);
return 0;
}
@@ -1140,7 +1140,7 @@
struct llc_sock *llc = llc_sk(sk);
mod_timer(&llc->rej_sent_timer.timer,
- jiffies + llc->rej_sent_timer.expire * HZ);
+ jiffies + llc->rej_sent_timer.expire);
return 0;
}
@@ -1151,7 +1151,7 @@
if (!timer_pending(&llc->ack_timer.timer))
mod_timer(&llc->ack_timer.timer,
- jiffies + llc->ack_timer.expire * HZ);
+ jiffies + llc->ack_timer.expire);
return 0;
}
@@ -1199,7 +1199,7 @@
}
if (unacked)
mod_timer(&llc->ack_timer.timer,
- jiffies + llc->ack_timer.expire * HZ);
+ jiffies + llc->ack_timer.expire);
} else if (llc->failed_data_req) {
u8 f_bit;
diff --git a/net/llc/llc_conn.c b/net/llc/llc_conn.c
index ce7b893..d3783f8 100644
--- a/net/llc/llc_conn.c
+++ b/net/llc/llc_conn.c
@@ -40,6 +40,11 @@
/* Offset table on connection states transition diagram */
static int llc_offset_table[NBR_CONN_STATES][NBR_CONN_EV];
+int sysctl_llc2_ack_timeout = LLC2_ACK_TIME * HZ;
+int sysctl_llc2_p_timeout = LLC2_P_TIME * HZ;
+int sysctl_llc2_rej_timeout = LLC2_REJ_TIME * HZ;
+int sysctl_llc2_busy_timeout = LLC2_BUSY_TIME * HZ;
+
/**
* llc_conn_state_process - sends event to connection state machine
* @sk: connection
@@ -799,22 +804,22 @@
llc->dec_step = llc->connect_step = 1;
init_timer(&llc->ack_timer.timer);
- llc->ack_timer.expire = LLC_ACK_TIME;
+ llc->ack_timer.expire = sysctl_llc2_ack_timeout;
llc->ack_timer.timer.data = (unsigned long)sk;
llc->ack_timer.timer.function = llc_conn_ack_tmr_cb;
init_timer(&llc->pf_cycle_timer.timer);
- llc->pf_cycle_timer.expire = LLC_P_TIME;
+ llc->pf_cycle_timer.expire = sysctl_llc2_p_timeout;
llc->pf_cycle_timer.timer.data = (unsigned long)sk;
llc->pf_cycle_timer.timer.function = llc_conn_pf_cycle_tmr_cb;
init_timer(&llc->rej_sent_timer.timer);
- llc->rej_sent_timer.expire = LLC_REJ_TIME;
+ llc->rej_sent_timer.expire = sysctl_llc2_rej_timeout;
llc->rej_sent_timer.timer.data = (unsigned long)sk;
llc->rej_sent_timer.timer.function = llc_conn_rej_tmr_cb;
init_timer(&llc->busy_state_timer.timer);
- llc->busy_state_timer.expire = LLC_BUSY_TIME;
+ llc->busy_state_timer.expire = sysctl_llc2_busy_timeout;
llc->busy_state_timer.timer.data = (unsigned long)sk;
llc->busy_state_timer.timer.function = llc_conn_busy_tmr_cb;
diff --git a/net/llc/llc_station.c b/net/llc/llc_station.c
index 85a7ac2..2d764b0 100644
--- a/net/llc/llc_station.c
+++ b/net/llc/llc_station.c
@@ -50,6 +50,10 @@
struct sk_buff_head mac_pdu_q;
};
+#define LLC_STATION_ACK_TIME (3 * HZ)
+
+int sysctl_llc_station_ack_timeout = LLC_STATION_ACK_TIME;
+
/* Types of events (possible values in 'ev->type') */
#define LLC_STATION_EV_TYPE_SIMPLE 1
#define LLC_STATION_EV_TYPE_CONDITION 2
@@ -218,7 +222,8 @@
static int llc_station_ac_start_ack_timer(struct sk_buff *skb)
{
- mod_timer(&llc_main_station.ack_timer, jiffies + LLC_ACK_TIME * HZ);
+ mod_timer(&llc_main_station.ack_timer,
+ jiffies + sysctl_llc_station_ack_timeout);
return 0;
}
@@ -687,7 +692,8 @@
init_timer(&llc_main_station.ack_timer);
llc_main_station.ack_timer.data = (unsigned long)&llc_main_station;
llc_main_station.ack_timer.function = llc_station_ack_tmr_cb;
-
+ llc_main_station.ack_timer.expires = jiffies +
+ sysctl_llc_station_ack_timeout;
skb = alloc_skb(0, GFP_ATOMIC);
if (!skb)
goto out;
@@ -695,7 +701,6 @@
llc_set_station_handler(llc_station_rcv);
ev = llc_station_ev(skb);
memset(ev, 0, sizeof(*ev));
- llc_main_station.ack_timer.expires = jiffies + 3 * HZ;
llc_main_station.maximum_retry = 1;
llc_main_station.state = LLC_STATION_STATE_DOWN;
ev->type = LLC_STATION_EV_TYPE_SIMPLE;
diff --git a/net/llc/sysctl_net_llc.c b/net/llc/sysctl_net_llc.c
new file mode 100644
index 0000000..4d99d2f
--- /dev/null
+++ b/net/llc/sysctl_net_llc.c
@@ -0,0 +1,136 @@
+/*
+ * sysctl_net_llc.c: sysctl interface to LLC net subsystem.
+ *
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ */
+
+#include <linux/config.h>
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <linux/sysctl.h>
+
+#ifndef CONFIG_SYSCTL
+#error This file should not be compiled without CONFIG_SYSCTL defined
+#endif
+
+extern int sysctl_llc2_ack_timeout;
+extern int sysctl_llc2_busy_timeout;
+extern int sysctl_llc2_p_timeout;
+extern int sysctl_llc2_rej_timeout;
+extern int sysctl_llc_station_ack_timeout;
+
+static struct ctl_table llc2_timeout_table[] = {
+ {
+ .ctl_name = NET_LLC2_ACK_TIMEOUT,
+ .procname = "ack",
+ .data = &sysctl_llc2_ack_timeout,
+ .maxlen = sizeof(long),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies,
+ },
+ {
+ .ctl_name = NET_LLC2_BUSY_TIMEOUT,
+ .procname = "busy",
+ .data = &sysctl_llc2_busy_timeout,
+ .maxlen = sizeof(long),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies,
+ },
+ {
+ .ctl_name = NET_LLC2_P_TIMEOUT,
+ .procname = "p",
+ .data = &sysctl_llc2_p_timeout,
+ .maxlen = sizeof(long),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies,
+ },
+ {
+ .ctl_name = NET_LLC2_REJ_TIMEOUT,
+ .procname = "rej",
+ .data = &sysctl_llc2_rej_timeout,
+ .maxlen = sizeof(long),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies,
+ },
+ { 0 },
+};
+
+static struct ctl_table llc_station_table[] = {
+ {
+ .ctl_name = NET_LLC_STATION_ACK_TIMEOUT,
+ .procname = "ack_timeout",
+ .data = &sysctl_llc_station_ack_timeout,
+ .maxlen = sizeof(long),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies,
+ },
+ { 0 },
+};
+
+static struct ctl_table llc2_dir_timeout_table[] = {
+ {
+ .ctl_name = NET_LLC2,
+ .procname = "timeout",
+ .mode = 0555,
+ .child = llc2_timeout_table,
+ },
+ { 0 },
+};
+
+static struct ctl_table llc_table[] = {
+ {
+ .ctl_name = NET_LLC2,
+ .procname = "llc2",
+ .mode = 0555,
+ .child = llc2_dir_timeout_table,
+ },
+ {
+ .ctl_name = NET_LLC_STATION,
+ .procname = "station",
+ .mode = 0555,
+ .child = llc_station_table,
+ },
+ { 0 },
+};
+
+static struct ctl_table llc_dir_table[] = {
+ {
+ .ctl_name = NET_LLC,
+ .procname = "llc",
+ .mode = 0555,
+ .child = llc_table,
+ },
+ { 0 },
+};
+
+static struct ctl_table llc_root_table[] = {
+ {
+ .ctl_name = CTL_NET,
+ .procname = "net",
+ .mode = 0555,
+ .child = llc_dir_table,
+ },
+ { 0 },
+};
+
+static struct ctl_table_header *llc_table_header;
+
+int __init llc_sysctl_init(void)
+{
+ llc_table_header = register_sysctl_table(llc_root_table, 1);
+
+ return llc_table_header ? 0 : -ENOMEM;
+}
+
+void llc_sysctl_exit(void)
+{
+ if (llc_table_header) {
+ unregister_sysctl_table(llc_table_header);
+ llc_table_header = NULL;
+ }
+}