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![Ido Schimmel](/assets/img/avatar_default.png)
br_should_learn() is protected by RCU and not by RTNL, so use correct
flavor of nbp_vlan_group().
Fixes: 907b1e6e83
("bridge: vlan: use proper rcu for the vlgrp
member")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
984 lines
22 KiB
C
984 lines
22 KiB
C
#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/rtnetlink.h>
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#include <linux/slab.h>
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#include <net/switchdev.h>
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#include "br_private.h"
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static inline int br_vlan_cmp(struct rhashtable_compare_arg *arg,
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const void *ptr)
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{
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const struct net_bridge_vlan *vle = ptr;
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u16 vid = *(u16 *)arg->key;
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return vle->vid != vid;
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}
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static const struct rhashtable_params br_vlan_rht_params = {
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.head_offset = offsetof(struct net_bridge_vlan, vnode),
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.key_offset = offsetof(struct net_bridge_vlan, vid),
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.key_len = sizeof(u16),
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.nelem_hint = 3,
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.locks_mul = 1,
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.max_size = VLAN_N_VID,
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.obj_cmpfn = br_vlan_cmp,
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.automatic_shrinking = true,
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};
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static struct net_bridge_vlan *br_vlan_lookup(struct rhashtable *tbl, u16 vid)
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{
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return rhashtable_lookup_fast(tbl, &vid, br_vlan_rht_params);
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}
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static void __vlan_add_pvid(struct net_bridge_vlan_group *vg, u16 vid)
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{
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if (vg->pvid == vid)
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return;
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smp_wmb();
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vg->pvid = vid;
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}
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static void __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid)
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{
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if (vg->pvid != vid)
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return;
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smp_wmb();
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vg->pvid = 0;
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}
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static void __vlan_add_flags(struct net_bridge_vlan *v, u16 flags)
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{
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struct net_bridge_vlan_group *vg;
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if (br_vlan_is_master(v))
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vg = br_vlan_group(v->br);
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else
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vg = nbp_vlan_group(v->port);
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if (flags & BRIDGE_VLAN_INFO_PVID)
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__vlan_add_pvid(vg, v->vid);
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else
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__vlan_delete_pvid(vg, v->vid);
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if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
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v->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
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else
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v->flags &= ~BRIDGE_VLAN_INFO_UNTAGGED;
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}
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static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br,
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u16 vid, u16 flags)
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{
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struct switchdev_obj_port_vlan v = {
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.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
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.flags = flags,
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.vid_begin = vid,
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.vid_end = vid,
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};
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int err;
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/* Try switchdev op first. In case it is not supported, fallback to
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* 8021q add.
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*/
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err = switchdev_port_obj_add(dev, &v.obj);
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if (err == -EOPNOTSUPP)
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return vlan_vid_add(dev, br->vlan_proto, vid);
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return err;
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}
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static void __vlan_add_list(struct net_bridge_vlan *v)
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{
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struct net_bridge_vlan_group *vg;
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struct list_head *headp, *hpos;
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struct net_bridge_vlan *vent;
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if (br_vlan_is_master(v))
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vg = br_vlan_group(v->br);
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else
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vg = nbp_vlan_group(v->port);
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headp = &vg->vlan_list;
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list_for_each_prev(hpos, headp) {
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vent = list_entry(hpos, struct net_bridge_vlan, vlist);
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if (v->vid < vent->vid)
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continue;
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else
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break;
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}
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list_add_rcu(&v->vlist, hpos);
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}
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static void __vlan_del_list(struct net_bridge_vlan *v)
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{
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list_del_rcu(&v->vlist);
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}
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static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br,
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u16 vid)
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{
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struct switchdev_obj_port_vlan v = {
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.obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
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.vid_begin = vid,
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.vid_end = vid,
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};
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int err;
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/* Try switchdev op first. In case it is not supported, fallback to
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* 8021q del.
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*/
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err = switchdev_port_obj_del(dev, &v.obj);
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if (err == -EOPNOTSUPP) {
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vlan_vid_del(dev, br->vlan_proto, vid);
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return 0;
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}
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return err;
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}
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/* Returns a master vlan, if it didn't exist it gets created. In all cases a
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* a reference is taken to the master vlan before returning.
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*/
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static struct net_bridge_vlan *br_vlan_get_master(struct net_bridge *br, u16 vid)
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{
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struct net_bridge_vlan_group *vg;
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struct net_bridge_vlan *masterv;
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vg = br_vlan_group(br);
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masterv = br_vlan_find(vg, vid);
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if (!masterv) {
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/* missing global ctx, create it now */
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if (br_vlan_add(br, vid, 0))
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return NULL;
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masterv = br_vlan_find(vg, vid);
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if (WARN_ON(!masterv))
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return NULL;
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}
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atomic_inc(&masterv->refcnt);
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return masterv;
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}
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static void br_vlan_put_master(struct net_bridge_vlan *masterv)
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{
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struct net_bridge_vlan_group *vg;
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if (!br_vlan_is_master(masterv))
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return;
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vg = br_vlan_group(masterv->br);
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if (atomic_dec_and_test(&masterv->refcnt)) {
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rhashtable_remove_fast(&vg->vlan_hash,
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&masterv->vnode, br_vlan_rht_params);
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__vlan_del_list(masterv);
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kfree_rcu(masterv, rcu);
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}
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}
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/* This is the shared VLAN add function which works for both ports and bridge
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* devices. There are four possible calls to this function in terms of the
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* vlan entry type:
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* 1. vlan is being added on a port (no master flags, global entry exists)
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* 2. vlan is being added on a bridge (both master and brentry flags)
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* 3. vlan is being added on a port, but a global entry didn't exist which
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* is being created right now (master flag set, brentry flag unset), the
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* global entry is used for global per-vlan features, but not for filtering
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* 4. same as 3 but with both master and brentry flags set so the entry
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* will be used for filtering in both the port and the bridge
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*/
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static int __vlan_add(struct net_bridge_vlan *v, u16 flags)
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{
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struct net_bridge_vlan *masterv = NULL;
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struct net_bridge_port *p = NULL;
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struct net_bridge_vlan_group *vg;
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struct net_device *dev;
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struct net_bridge *br;
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int err;
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if (br_vlan_is_master(v)) {
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br = v->br;
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dev = br->dev;
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vg = br_vlan_group(br);
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} else {
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p = v->port;
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br = p->br;
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dev = p->dev;
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vg = nbp_vlan_group(p);
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}
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if (p) {
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/* Add VLAN to the device filter if it is supported.
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* This ensures tagged traffic enters the bridge when
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* promiscuous mode is disabled by br_manage_promisc().
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*/
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err = __vlan_vid_add(dev, br, v->vid, flags);
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if (err)
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goto out;
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/* need to work on the master vlan too */
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if (flags & BRIDGE_VLAN_INFO_MASTER) {
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err = br_vlan_add(br, v->vid, flags |
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BRIDGE_VLAN_INFO_BRENTRY);
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if (err)
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goto out_filt;
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}
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masterv = br_vlan_get_master(br, v->vid);
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if (!masterv)
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goto out_filt;
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v->brvlan = masterv;
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}
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/* Add the dev mac and count the vlan only if it's usable */
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if (br_vlan_should_use(v)) {
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err = br_fdb_insert(br, p, dev->dev_addr, v->vid);
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if (err) {
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br_err(br, "failed insert local address into bridge forwarding table\n");
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goto out_filt;
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}
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vg->num_vlans++;
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}
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err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode,
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br_vlan_rht_params);
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if (err)
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goto out_fdb_insert;
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__vlan_add_list(v);
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__vlan_add_flags(v, flags);
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out:
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return err;
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out_fdb_insert:
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if (br_vlan_should_use(v)) {
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br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid);
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vg->num_vlans--;
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}
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out_filt:
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if (p) {
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__vlan_vid_del(dev, br, v->vid);
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if (masterv) {
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br_vlan_put_master(masterv);
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v->brvlan = NULL;
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}
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}
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goto out;
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}
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static int __vlan_del(struct net_bridge_vlan *v)
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{
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struct net_bridge_vlan *masterv = v;
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struct net_bridge_vlan_group *vg;
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struct net_bridge_port *p = NULL;
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int err = 0;
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if (br_vlan_is_master(v)) {
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vg = br_vlan_group(v->br);
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} else {
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p = v->port;
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vg = nbp_vlan_group(v->port);
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masterv = v->brvlan;
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}
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__vlan_delete_pvid(vg, v->vid);
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if (p) {
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err = __vlan_vid_del(p->dev, p->br, v->vid);
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if (err)
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goto out;
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}
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if (br_vlan_should_use(v)) {
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v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY;
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vg->num_vlans--;
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}
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if (masterv != v) {
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rhashtable_remove_fast(&vg->vlan_hash, &v->vnode,
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br_vlan_rht_params);
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__vlan_del_list(v);
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kfree_rcu(v, rcu);
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}
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br_vlan_put_master(masterv);
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out:
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return err;
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}
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static void __vlan_group_free(struct net_bridge_vlan_group *vg)
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{
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WARN_ON(!list_empty(&vg->vlan_list));
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rhashtable_destroy(&vg->vlan_hash);
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kfree(vg);
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}
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static void __vlan_flush(struct net_bridge_vlan_group *vg)
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{
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struct net_bridge_vlan *vlan, *tmp;
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__vlan_delete_pvid(vg, vg->pvid);
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list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist)
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__vlan_del(vlan);
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}
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struct sk_buff *br_handle_vlan(struct net_bridge *br,
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struct net_bridge_vlan_group *vg,
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struct sk_buff *skb)
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{
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struct net_bridge_vlan *v;
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u16 vid;
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/* If this packet was not filtered at input, let it pass */
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if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
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goto out;
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/* At this point, we know that the frame was filtered and contains
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* a valid vlan id. If the vlan id has untagged flag set,
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* send untagged; otherwise, send tagged.
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*/
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br_vlan_get_tag(skb, &vid);
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v = br_vlan_find(vg, vid);
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/* Vlan entry must be configured at this point. The
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* only exception is the bridge is set in promisc mode and the
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* packet is destined for the bridge device. In this case
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* pass the packet as is.
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*/
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if (!v || !br_vlan_should_use(v)) {
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if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) {
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goto out;
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} else {
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kfree_skb(skb);
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return NULL;
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}
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}
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if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
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skb->vlan_tci = 0;
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out:
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return skb;
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}
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/* Called under RCU */
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static bool __allowed_ingress(struct net_bridge_vlan_group *vg, __be16 proto,
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struct sk_buff *skb, u16 *vid)
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{
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const struct net_bridge_vlan *v;
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bool tagged;
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BR_INPUT_SKB_CB(skb)->vlan_filtered = true;
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/* If vlan tx offload is disabled on bridge device and frame was
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* sent from vlan device on the bridge device, it does not have
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* HW accelerated vlan tag.
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*/
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if (unlikely(!skb_vlan_tag_present(skb) &&
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skb->protocol == proto)) {
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skb = skb_vlan_untag(skb);
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if (unlikely(!skb))
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return false;
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}
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if (!br_vlan_get_tag(skb, vid)) {
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/* Tagged frame */
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if (skb->vlan_proto != proto) {
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/* Protocol-mismatch, empty out vlan_tci for new tag */
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skb_push(skb, ETH_HLEN);
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skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto,
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skb_vlan_tag_get(skb));
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if (unlikely(!skb))
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return false;
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skb_pull(skb, ETH_HLEN);
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skb_reset_mac_len(skb);
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*vid = 0;
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tagged = false;
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} else {
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tagged = true;
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}
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} else {
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/* Untagged frame */
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tagged = false;
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}
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if (!*vid) {
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u16 pvid = br_get_pvid(vg);
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/* Frame had a tag with VID 0 or did not have a tag.
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* See if pvid is set on this port. That tells us which
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* vlan untagged or priority-tagged traffic belongs to.
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*/
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if (!pvid)
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goto drop;
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/* PVID is set on this port. Any untagged or priority-tagged
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* ingress frame is considered to belong to this vlan.
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*/
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*vid = pvid;
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if (likely(!tagged))
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/* Untagged Frame. */
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__vlan_hwaccel_put_tag(skb, proto, pvid);
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else
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/* Priority-tagged Frame.
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* At this point, We know that skb->vlan_tci had
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* VLAN_TAG_PRESENT bit and its VID field was 0x000.
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* We update only VID field and preserve PCP field.
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*/
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skb->vlan_tci |= pvid;
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return true;
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}
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/* Frame had a valid vlan tag. See if vlan is allowed */
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v = br_vlan_find(vg, *vid);
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if (v && br_vlan_should_use(v))
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return true;
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drop:
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kfree_skb(skb);
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return false;
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}
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bool br_allowed_ingress(const struct net_bridge *br,
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struct net_bridge_vlan_group *vg, struct sk_buff *skb,
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u16 *vid)
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{
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/* If VLAN filtering is disabled on the bridge, all packets are
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* permitted.
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*/
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if (!br->vlan_enabled) {
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BR_INPUT_SKB_CB(skb)->vlan_filtered = false;
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return true;
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}
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|
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return __allowed_ingress(vg, br->vlan_proto, skb, vid);
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}
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|
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/* Called under RCU. */
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bool br_allowed_egress(struct net_bridge_vlan_group *vg,
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const struct sk_buff *skb)
|
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{
|
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const struct net_bridge_vlan *v;
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u16 vid;
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|
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/* If this packet was not filtered at input, let it pass */
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if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
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return true;
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br_vlan_get_tag(skb, &vid);
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v = br_vlan_find(vg, vid);
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if (v && br_vlan_should_use(v))
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return true;
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|
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return false;
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}
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|
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/* Called under RCU */
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bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid)
|
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{
|
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struct net_bridge_vlan_group *vg;
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struct net_bridge *br = p->br;
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|
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/* If filtering was disabled at input, let it pass. */
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if (!br->vlan_enabled)
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return true;
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|
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vg = nbp_vlan_group_rcu(p);
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if (!vg || !vg->num_vlans)
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return false;
|
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|
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if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto)
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*vid = 0;
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|
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if (!*vid) {
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*vid = br_get_pvid(vg);
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if (!*vid)
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return false;
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|
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return true;
|
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}
|
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|
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if (br_vlan_find(vg, *vid))
|
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return true;
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|
|
return false;
|
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}
|
|
|
|
/* Must be protected by RTNL.
|
|
* Must be called with vid in range from 1 to 4094 inclusive.
|
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*/
|
|
int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
|
|
{
|
|
struct net_bridge_vlan_group *vg;
|
|
struct net_bridge_vlan *vlan;
|
|
int ret;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
vg = br_vlan_group(br);
|
|
vlan = br_vlan_find(vg, vid);
|
|
if (vlan) {
|
|
if (!br_vlan_is_brentry(vlan)) {
|
|
/* Trying to change flags of non-existent bridge vlan */
|
|
if (!(flags & BRIDGE_VLAN_INFO_BRENTRY))
|
|
return -EINVAL;
|
|
/* It was only kept for port vlans, now make it real */
|
|
ret = br_fdb_insert(br, NULL, br->dev->dev_addr,
|
|
vlan->vid);
|
|
if (ret) {
|
|
br_err(br, "failed insert local address into bridge forwarding table\n");
|
|
return ret;
|
|
}
|
|
atomic_inc(&vlan->refcnt);
|
|
vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY;
|
|
vg->num_vlans++;
|
|
}
|
|
__vlan_add_flags(vlan, flags);
|
|
return 0;
|
|
}
|
|
|
|
vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
|
|
if (!vlan)
|
|
return -ENOMEM;
|
|
|
|
vlan->vid = vid;
|
|
vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER;
|
|
vlan->flags &= ~BRIDGE_VLAN_INFO_PVID;
|
|
vlan->br = br;
|
|
if (flags & BRIDGE_VLAN_INFO_BRENTRY)
|
|
atomic_set(&vlan->refcnt, 1);
|
|
ret = __vlan_add(vlan, flags);
|
|
if (ret)
|
|
kfree(vlan);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Must be protected by RTNL.
|
|
* Must be called with vid in range from 1 to 4094 inclusive.
|
|
*/
|
|
int br_vlan_delete(struct net_bridge *br, u16 vid)
|
|
{
|
|
struct net_bridge_vlan_group *vg;
|
|
struct net_bridge_vlan *v;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
vg = br_vlan_group(br);
|
|
v = br_vlan_find(vg, vid);
|
|
if (!v || !br_vlan_is_brentry(v))
|
|
return -ENOENT;
|
|
|
|
br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid);
|
|
br_fdb_delete_by_port(br, NULL, vid, 0);
|
|
|
|
return __vlan_del(v);
|
|
}
|
|
|
|
void br_vlan_flush(struct net_bridge *br)
|
|
{
|
|
struct net_bridge_vlan_group *vg;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
vg = br_vlan_group(br);
|
|
__vlan_flush(vg);
|
|
RCU_INIT_POINTER(br->vlgrp, NULL);
|
|
synchronize_rcu();
|
|
__vlan_group_free(vg);
|
|
}
|
|
|
|
struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid)
|
|
{
|
|
if (!vg)
|
|
return NULL;
|
|
|
|
return br_vlan_lookup(&vg->vlan_hash, vid);
|
|
}
|
|
|
|
/* Must be protected by RTNL. */
|
|
static void recalculate_group_addr(struct net_bridge *br)
|
|
{
|
|
if (br->group_addr_set)
|
|
return;
|
|
|
|
spin_lock_bh(&br->lock);
|
|
if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q)) {
|
|
/* Bridge Group Address */
|
|
br->group_addr[5] = 0x00;
|
|
} else { /* vlan_enabled && ETH_P_8021AD */
|
|
/* Provider Bridge Group Address */
|
|
br->group_addr[5] = 0x08;
|
|
}
|
|
spin_unlock_bh(&br->lock);
|
|
}
|
|
|
|
/* Must be protected by RTNL. */
|
|
void br_recalculate_fwd_mask(struct net_bridge *br)
|
|
{
|
|
if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q))
|
|
br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
|
|
else /* vlan_enabled && ETH_P_8021AD */
|
|
br->group_fwd_mask_required = BR_GROUPFWD_8021AD &
|
|
~(1u << br->group_addr[5]);
|
|
}
|
|
|
|
int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
|
|
{
|
|
if (br->vlan_enabled == val)
|
|
return 0;
|
|
|
|
br->vlan_enabled = val;
|
|
br_manage_promisc(br);
|
|
recalculate_group_addr(br);
|
|
br_recalculate_fwd_mask(br);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
|
|
{
|
|
if (!rtnl_trylock())
|
|
return restart_syscall();
|
|
|
|
__br_vlan_filter_toggle(br, val);
|
|
rtnl_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int __br_vlan_set_proto(struct net_bridge *br, __be16 proto)
|
|
{
|
|
int err = 0;
|
|
struct net_bridge_port *p;
|
|
struct net_bridge_vlan *vlan;
|
|
struct net_bridge_vlan_group *vg;
|
|
__be16 oldproto;
|
|
|
|
if (br->vlan_proto == proto)
|
|
return 0;
|
|
|
|
/* Add VLANs for the new proto to the device filter. */
|
|
list_for_each_entry(p, &br->port_list, list) {
|
|
vg = nbp_vlan_group(p);
|
|
list_for_each_entry(vlan, &vg->vlan_list, vlist) {
|
|
err = vlan_vid_add(p->dev, proto, vlan->vid);
|
|
if (err)
|
|
goto err_filt;
|
|
}
|
|
}
|
|
|
|
oldproto = br->vlan_proto;
|
|
br->vlan_proto = proto;
|
|
|
|
recalculate_group_addr(br);
|
|
br_recalculate_fwd_mask(br);
|
|
|
|
/* Delete VLANs for the old proto from the device filter. */
|
|
list_for_each_entry(p, &br->port_list, list) {
|
|
vg = nbp_vlan_group(p);
|
|
list_for_each_entry(vlan, &vg->vlan_list, vlist)
|
|
vlan_vid_del(p->dev, oldproto, vlan->vid);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_filt:
|
|
list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist)
|
|
vlan_vid_del(p->dev, proto, vlan->vid);
|
|
|
|
list_for_each_entry_continue_reverse(p, &br->port_list, list) {
|
|
vg = nbp_vlan_group(p);
|
|
list_for_each_entry(vlan, &vg->vlan_list, vlist)
|
|
vlan_vid_del(p->dev, proto, vlan->vid);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int br_vlan_set_proto(struct net_bridge *br, unsigned long val)
|
|
{
|
|
int err;
|
|
|
|
if (val != ETH_P_8021Q && val != ETH_P_8021AD)
|
|
return -EPROTONOSUPPORT;
|
|
|
|
if (!rtnl_trylock())
|
|
return restart_syscall();
|
|
|
|
err = __br_vlan_set_proto(br, htons(val));
|
|
rtnl_unlock();
|
|
|
|
return err;
|
|
}
|
|
|
|
static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid)
|
|
{
|
|
struct net_bridge_vlan *v;
|
|
|
|
if (vid != vg->pvid)
|
|
return false;
|
|
|
|
v = br_vlan_lookup(&vg->vlan_hash, vid);
|
|
if (v && br_vlan_should_use(v) &&
|
|
(v->flags & BRIDGE_VLAN_INFO_UNTAGGED))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static void br_vlan_disable_default_pvid(struct net_bridge *br)
|
|
{
|
|
struct net_bridge_port *p;
|
|
u16 pvid = br->default_pvid;
|
|
|
|
/* Disable default_pvid on all ports where it is still
|
|
* configured.
|
|
*/
|
|
if (vlan_default_pvid(br_vlan_group(br), pvid))
|
|
br_vlan_delete(br, pvid);
|
|
|
|
list_for_each_entry(p, &br->port_list, list) {
|
|
if (vlan_default_pvid(nbp_vlan_group(p), pvid))
|
|
nbp_vlan_delete(p, pvid);
|
|
}
|
|
|
|
br->default_pvid = 0;
|
|
}
|
|
|
|
int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid)
|
|
{
|
|
const struct net_bridge_vlan *pvent;
|
|
struct net_bridge_vlan_group *vg;
|
|
struct net_bridge_port *p;
|
|
u16 old_pvid;
|
|
int err = 0;
|
|
unsigned long *changed;
|
|
|
|
if (!pvid) {
|
|
br_vlan_disable_default_pvid(br);
|
|
return 0;
|
|
}
|
|
|
|
changed = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long),
|
|
GFP_KERNEL);
|
|
if (!changed)
|
|
return -ENOMEM;
|
|
|
|
old_pvid = br->default_pvid;
|
|
|
|
/* Update default_pvid config only if we do not conflict with
|
|
* user configuration.
|
|
*/
|
|
vg = br_vlan_group(br);
|
|
pvent = br_vlan_find(vg, pvid);
|
|
if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) &&
|
|
(!pvent || !br_vlan_should_use(pvent))) {
|
|
err = br_vlan_add(br, pvid,
|
|
BRIDGE_VLAN_INFO_PVID |
|
|
BRIDGE_VLAN_INFO_UNTAGGED |
|
|
BRIDGE_VLAN_INFO_BRENTRY);
|
|
if (err)
|
|
goto out;
|
|
br_vlan_delete(br, old_pvid);
|
|
set_bit(0, changed);
|
|
}
|
|
|
|
list_for_each_entry(p, &br->port_list, list) {
|
|
/* Update default_pvid config only if we do not conflict with
|
|
* user configuration.
|
|
*/
|
|
vg = nbp_vlan_group(p);
|
|
if ((old_pvid &&
|
|
!vlan_default_pvid(vg, old_pvid)) ||
|
|
br_vlan_find(vg, pvid))
|
|
continue;
|
|
|
|
err = nbp_vlan_add(p, pvid,
|
|
BRIDGE_VLAN_INFO_PVID |
|
|
BRIDGE_VLAN_INFO_UNTAGGED);
|
|
if (err)
|
|
goto err_port;
|
|
nbp_vlan_delete(p, old_pvid);
|
|
set_bit(p->port_no, changed);
|
|
}
|
|
|
|
br->default_pvid = pvid;
|
|
|
|
out:
|
|
kfree(changed);
|
|
return err;
|
|
|
|
err_port:
|
|
list_for_each_entry_continue_reverse(p, &br->port_list, list) {
|
|
if (!test_bit(p->port_no, changed))
|
|
continue;
|
|
|
|
if (old_pvid)
|
|
nbp_vlan_add(p, old_pvid,
|
|
BRIDGE_VLAN_INFO_PVID |
|
|
BRIDGE_VLAN_INFO_UNTAGGED);
|
|
nbp_vlan_delete(p, pvid);
|
|
}
|
|
|
|
if (test_bit(0, changed)) {
|
|
if (old_pvid)
|
|
br_vlan_add(br, old_pvid,
|
|
BRIDGE_VLAN_INFO_PVID |
|
|
BRIDGE_VLAN_INFO_UNTAGGED |
|
|
BRIDGE_VLAN_INFO_BRENTRY);
|
|
br_vlan_delete(br, pvid);
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val)
|
|
{
|
|
u16 pvid = val;
|
|
int err = 0;
|
|
|
|
if (val >= VLAN_VID_MASK)
|
|
return -EINVAL;
|
|
|
|
if (!rtnl_trylock())
|
|
return restart_syscall();
|
|
|
|
if (pvid == br->default_pvid)
|
|
goto unlock;
|
|
|
|
/* Only allow default pvid change when filtering is disabled */
|
|
if (br->vlan_enabled) {
|
|
pr_info_once("Please disable vlan filtering to change default_pvid\n");
|
|
err = -EPERM;
|
|
goto unlock;
|
|
}
|
|
err = __br_vlan_set_default_pvid(br, pvid);
|
|
unlock:
|
|
rtnl_unlock();
|
|
return err;
|
|
}
|
|
|
|
int br_vlan_init(struct net_bridge *br)
|
|
{
|
|
struct net_bridge_vlan_group *vg;
|
|
int ret = -ENOMEM;
|
|
|
|
vg = kzalloc(sizeof(*vg), GFP_KERNEL);
|
|
if (!vg)
|
|
goto out;
|
|
ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
|
|
if (ret)
|
|
goto err_rhtbl;
|
|
INIT_LIST_HEAD(&vg->vlan_list);
|
|
br->vlan_proto = htons(ETH_P_8021Q);
|
|
br->default_pvid = 1;
|
|
rcu_assign_pointer(br->vlgrp, vg);
|
|
ret = br_vlan_add(br, 1,
|
|
BRIDGE_VLAN_INFO_PVID | BRIDGE_VLAN_INFO_UNTAGGED |
|
|
BRIDGE_VLAN_INFO_BRENTRY);
|
|
if (ret)
|
|
goto err_vlan_add;
|
|
|
|
out:
|
|
return ret;
|
|
|
|
err_vlan_add:
|
|
rhashtable_destroy(&vg->vlan_hash);
|
|
err_rhtbl:
|
|
kfree(vg);
|
|
|
|
goto out;
|
|
}
|
|
|
|
int nbp_vlan_init(struct net_bridge_port *p)
|
|
{
|
|
struct net_bridge_vlan_group *vg;
|
|
int ret = -ENOMEM;
|
|
|
|
vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL);
|
|
if (!vg)
|
|
goto out;
|
|
|
|
ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
|
|
if (ret)
|
|
goto err_rhtbl;
|
|
INIT_LIST_HEAD(&vg->vlan_list);
|
|
rcu_assign_pointer(p->vlgrp, vg);
|
|
if (p->br->default_pvid) {
|
|
ret = nbp_vlan_add(p, p->br->default_pvid,
|
|
BRIDGE_VLAN_INFO_PVID |
|
|
BRIDGE_VLAN_INFO_UNTAGGED);
|
|
if (ret)
|
|
goto err_vlan_add;
|
|
}
|
|
out:
|
|
return ret;
|
|
|
|
err_vlan_add:
|
|
RCU_INIT_POINTER(p->vlgrp, NULL);
|
|
synchronize_rcu();
|
|
rhashtable_destroy(&vg->vlan_hash);
|
|
err_rhtbl:
|
|
kfree(vg);
|
|
|
|
goto out;
|
|
}
|
|
|
|
/* Must be protected by RTNL.
|
|
* Must be called with vid in range from 1 to 4094 inclusive.
|
|
*/
|
|
int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
|
|
{
|
|
struct net_bridge_vlan *vlan;
|
|
int ret;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
vlan = br_vlan_find(nbp_vlan_group(port), vid);
|
|
if (vlan) {
|
|
__vlan_add_flags(vlan, flags);
|
|
return 0;
|
|
}
|
|
|
|
vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
|
|
if (!vlan)
|
|
return -ENOMEM;
|
|
|
|
vlan->vid = vid;
|
|
vlan->port = port;
|
|
ret = __vlan_add(vlan, flags);
|
|
if (ret)
|
|
kfree(vlan);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Must be protected by RTNL.
|
|
* Must be called with vid in range from 1 to 4094 inclusive.
|
|
*/
|
|
int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
|
|
{
|
|
struct net_bridge_vlan *v;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
v = br_vlan_find(nbp_vlan_group(port), vid);
|
|
if (!v)
|
|
return -ENOENT;
|
|
br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid);
|
|
br_fdb_delete_by_port(port->br, port, vid, 0);
|
|
|
|
return __vlan_del(v);
|
|
}
|
|
|
|
void nbp_vlan_flush(struct net_bridge_port *port)
|
|
{
|
|
struct net_bridge_vlan_group *vg;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
vg = nbp_vlan_group(port);
|
|
__vlan_flush(vg);
|
|
RCU_INIT_POINTER(port->vlgrp, NULL);
|
|
synchronize_rcu();
|
|
__vlan_group_free(vg);
|
|
}
|