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Date: Wed, 24 Sep 2014 17:52:02 +0200
From: Ahmed Amamou <ahmed@...di.net>
To: netdev@...r.kernel.org
Cc: william@...di.net, f.cachereul@...halink.fr,
Ahmed Amamou <ahmed@...di.net>,
Kamel Haddadou <kamel@...di.net>
Subject: [RFC PATCH 06/24] net: rbridge: Enable/disable TRILL capability
enable switching TRILL capability state via sysfs command
Signed-off-by: Ahmed Amamou <ahmed@...di.net>
Signed-off-by: Kamel Haddadou <kamel@...di.net>
---
net/bridge/Makefile | 2 ++
net/bridge/br_private.h | 5 ++++
net/bridge/br_sysfs_br.c | 38 +++++++++++++++++++++++
net/bridge/rbridge/rbr.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 123 insertions(+)
create mode 100644 net/bridge/rbridge/rbr.c
diff --git a/net/bridge/Makefile b/net/bridge/Makefile
index 8590b94..314783c 100644
--- a/net/bridge/Makefile
+++ b/net/bridge/Makefile
@@ -17,3 +17,5 @@ bridge-$(CONFIG_BRIDGE_IGMP_SNOOPING) += br_multicast.o br_mdb.o
bridge-$(CONFIG_BRIDGE_VLAN_FILTERING) += br_vlan.o
obj-$(CONFIG_NETFILTER) += netfilter/
+
+bridge-$(CONFIG_TRILL) += rbridge/rbr.o
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 430c556..844c87b 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -811,6 +811,11 @@ int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
+/* rbridge/rbr.c */
+#ifdef CONFIG_TRILL
+void br_trill_set_enabled(struct net_bridge *br, unsigned long val);
+#endif
+
/* br_stp_bpdu.c */
struct stp_proto;
void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c
index c9e2572..787ab84 100644
--- a/net/bridge/br_sysfs_br.c
+++ b/net/bridge/br_sysfs_br.c
@@ -146,6 +146,41 @@ static ssize_t stp_state_store(struct device *d,
}
static DEVICE_ATTR_RW(stp_state);
+#ifdef CONFIG_TRILL
+static ssize_t trill_state_show(struct device *d,
+ struct device_attribute *attr, char *buf)
+{
+ struct net_bridge *br = to_bridge(d);
+ return sprintf(buf, "%d\n", br->trill_enabled);
+}
+
+static ssize_t trill_state_store(struct device *d,
+ struct device_attribute *attr, const char *buf,
+ size_t len)
+{
+ struct net_bridge *br = to_bridge(d);
+ char *endp;
+ unsigned long val;
+
+ if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
+ return -EPERM;
+
+ val = simple_strtoul(buf, &endp, 0);
+ if (endp == buf)
+ return -EINVAL;
+
+ if (!rtnl_trylock())
+ return restart_syscall();
+ br_trill_set_enabled(br, val);
+ rtnl_unlock();
+
+ return len;
+}
+
+static DEVICE_ATTR_RW(trill_state);
+#endif
+
+
static ssize_t group_fwd_mask_show(struct device *d,
struct device_attribute *attr,
char *buf)
@@ -733,6 +768,9 @@ static struct attribute *bridge_attrs[] = {
&dev_attr_max_age.attr,
&dev_attr_ageing_time.attr,
&dev_attr_stp_state.attr,
+#ifdef CONFIG_TRILL
+ &dev_attr_trill_state.attr,
+#endif
&dev_attr_group_fwd_mask.attr,
&dev_attr_priority.attr,
&dev_attr_bridge_id.attr,
diff --git a/net/bridge/rbridge/rbr.c b/net/bridge/rbridge/rbr.c
new file mode 100644
index 0000000..41d47db
--- /dev/null
+++ b/net/bridge/rbridge/rbr.c
@@ -0,0 +1,78 @@
+/*
+ * Generic parts
+ * Linux ethernet Rbridge
+ *
+ * Authors:
+ * Ahmed AMAMOU <ahmed@...di.net>
+ * Kamel Haddadou <kamel@...di.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include "br_private.h"
+#include "rbr_private.h"
+
+static struct rbr *add_rbr(struct net_bridge *br)
+{
+ struct rbr *rbr;
+
+ if (!br->rbr) {
+ rbr = kzalloc(sizeof(*rbr), GFP_KERNEL);
+ if (!rbr)
+ return NULL;
+
+ rbr->br = br;
+ rbr->nick = RBRIDGE_NICKNAME_NONE;
+ rbr->treeroot = RBRIDGE_NICKNAME_NONE;
+ return rbr;
+ }
+
+ return br->rbr;
+}
+
+static void br_trill_start(struct net_bridge *br)
+{
+ /* Disable STP if it is already enabled */
+
+ if (br->stp_enabled != BR_NO_STP)
+ br_stp_set_enabled(br, false);
+ br->rbr = add_rbr(br);
+ if (br->rbr) {
+ spin_lock_bh(&br->lock);
+ br->trill_enabled = BR_TRILL;
+ spin_unlock_bh(&br->lock);
+ } else {
+ printk(KERN_WARNING
+ "RBridge allocation for bridge '%s' failed\n",
+ br->dev->name);
+ }
+}
+
+static void br_trill_stop(struct net_bridge *br)
+{
+ struct rbr *old;
+
+ spin_lock_bh(&br->lock);
+ br->trill_enabled = BR_NO_TRILL;
+ spin_unlock_bh(&br->lock);
+ old = br->rbr;
+ br->rbr = NULL;
+ if (likely(old)) {
+ spin_lock_bh(&br->lock);
+ kfree(old);
+ spin_unlock_bh(&br->lock);
+ }
+}
+
+void br_trill_set_enabled(struct net_bridge *br, unsigned long val)
+{
+ if (val) {
+ if (br->trill_enabled == BR_NO_TRILL)
+ br_trill_start(br);
+ } else {
+ if (br->trill_enabled != BR_NO_TRILL)
+ br_trill_stop(br);
+ }
+}
--
1.9.1
--
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