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net: dsa: add support for switchdev FDB objects
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Remove the fdb_{add,del,getnext} function pointer in favor of new
port_fdb_{add,del,getnext}.

Implement the switchdev_port_obj_{add,del,dump} functions in DSA to
support the SWITCHDEV_OBJ_PORT_FDB objects.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Vivien Didelot authored and David S. Miller committed Aug 10, 2015
1 parent 8902482 commit 55045dd
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Showing 4 changed files with 126 additions and 114 deletions.
3 changes: 0 additions & 3 deletions drivers/net/dsa/mv88e6171.c
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Original file line number Diff line number Diff line change
Expand Up @@ -116,9 +116,6 @@ struct dsa_switch_driver mv88e6171_switch_driver = {
.port_join_bridge = mv88e6xxx_join_bridge,
.port_leave_bridge = mv88e6xxx_leave_bridge,
.port_stp_update = mv88e6xxx_port_stp_update,
.fdb_add = mv88e6xxx_port_fdb_add,
.fdb_del = mv88e6xxx_port_fdb_del,
.fdb_getnext = mv88e6xxx_port_fdb_getnext,
};

MODULE_ALIAS("platform:mv88e6171");
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3 changes: 0 additions & 3 deletions drivers/net/dsa/mv88e6352.c
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Original file line number Diff line number Diff line change
Expand Up @@ -341,9 +341,6 @@ struct dsa_switch_driver mv88e6352_switch_driver = {
.port_join_bridge = mv88e6xxx_join_bridge,
.port_leave_bridge = mv88e6xxx_leave_bridge,
.port_stp_update = mv88e6xxx_port_stp_update,
.fdb_add = mv88e6xxx_port_fdb_add,
.fdb_del = mv88e6xxx_port_fdb_del,
.fdb_getnext = mv88e6xxx_port_fdb_getnext,
};

MODULE_ALIAS("platform:mv88e6172");
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16 changes: 10 additions & 6 deletions include/net/dsa.h
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Original file line number Diff line number Diff line change
Expand Up @@ -296,12 +296,16 @@ struct dsa_switch_driver {
u32 br_port_mask);
int (*port_stp_update)(struct dsa_switch *ds, int port,
u8 state);
int (*fdb_add)(struct dsa_switch *ds, int port,
const unsigned char *addr, u16 vid);
int (*fdb_del)(struct dsa_switch *ds, int port,
const unsigned char *addr, u16 vid);
int (*fdb_getnext)(struct dsa_switch *ds, int port,
unsigned char *addr, bool *is_static);

/*
* Forwarding database
*/
int (*port_fdb_add)(struct dsa_switch *ds, int port, u16 vid,
const u8 addr[ETH_ALEN]);
int (*port_fdb_del)(struct dsa_switch *ds, int port, u16 vid,
const u8 addr[ETH_ALEN]);
int (*port_fdb_getnext)(struct dsa_switch *ds, int port, u16 *vid,
u8 addr[ETH_ALEN], bool *is_static);
};

void register_switch_driver(struct dsa_switch_driver *type);
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218 changes: 116 additions & 102 deletions net/dsa/slave.c
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@
#include <net/switchdev.h>
#include <linux/if_bridge.h>
#include <linux/netpoll.h>
#include <linux/if_vlan.h>
#include "dsa_priv.h"

/* slave mii_bus handling ***************************************************/
Expand Down Expand Up @@ -200,105 +201,6 @@ static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
return 0;
}

static int dsa_slave_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
struct net_device *dev,
const unsigned char *addr, u16 vid, u16 nlm_flags)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
int ret = -EOPNOTSUPP;

if (ds->drv->fdb_add)
ret = ds->drv->fdb_add(ds, p->port, addr, vid);

return ret;
}

static int dsa_slave_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
struct net_device *dev,
const unsigned char *addr, u16 vid)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
int ret = -EOPNOTSUPP;

if (ds->drv->fdb_del)
ret = ds->drv->fdb_del(ds, p->port, addr, vid);

return ret;
}

static int dsa_slave_fill_info(struct net_device *dev, struct sk_buff *skb,
const unsigned char *addr, u16 vid,
bool is_static,
u32 portid, u32 seq, int type,
unsigned int flags)
{
struct nlmsghdr *nlh;
struct ndmsg *ndm;

nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
if (!nlh)
return -EMSGSIZE;

ndm = nlmsg_data(nlh);
ndm->ndm_family = AF_BRIDGE;
ndm->ndm_pad1 = 0;
ndm->ndm_pad2 = 0;
ndm->ndm_flags = NTF_EXT_LEARNED;
ndm->ndm_type = 0;
ndm->ndm_ifindex = dev->ifindex;
ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;

if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr))
goto nla_put_failure;

if (vid && nla_put_u16(skb, NDA_VLAN, vid))
goto nla_put_failure;

nlmsg_end(skb, nlh);
return 0;

nla_put_failure:
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
}

/* Dump information about entries, in response to GETNEIGH */
static int dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
struct net_device *dev,
struct net_device *filter_dev, int idx)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
unsigned char addr[ETH_ALEN] = { 0 };
int ret;

if (!ds->drv->fdb_getnext)
return -EOPNOTSUPP;

for (; ; idx++) {
bool is_static;

ret = ds->drv->fdb_getnext(ds, p->port, addr, &is_static);
if (ret < 0)
break;

if (idx < cb->args[0])
continue;

ret = dsa_slave_fill_info(dev, skb, addr, 0,
is_static,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
RTM_NEWNEIGH, NLM_F_MULTI);
if (ret < 0)
break;
}

return idx;
}

static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
struct dsa_slave_priv *p = netdev_priv(dev);
Expand Down Expand Up @@ -364,6 +266,115 @@ static int dsa_slave_port_attr_set(struct net_device *dev,
return ret;
}

static int dsa_slave_port_fdb_add(struct net_device *dev,
struct switchdev_obj *obj)
{
struct switchdev_obj_fdb *fdb = &obj->u.fdb;
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
int err;

if (obj->trans == SWITCHDEV_TRANS_PREPARE)
err = ds->drv->port_fdb_add ? 0 : -EOPNOTSUPP;
else if (obj->trans == SWITCHDEV_TRANS_COMMIT)
err = ds->drv->port_fdb_add(ds, p->port, fdb->vid, fdb->addr);
else
err = -EOPNOTSUPP;

return err;
}

static int dsa_slave_port_fdb_del(struct net_device *dev,
struct switchdev_obj *obj)
{
struct switchdev_obj_fdb *fdb = &obj->u.fdb;
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;

if (!ds->drv->port_fdb_del)
return -EOPNOTSUPP;

return ds->drv->port_fdb_del(ds, p->port, fdb->vid, fdb->addr);
}

static int dsa_slave_port_fdb_dump(struct net_device *dev,
struct switchdev_obj *obj)
{
struct switchdev_obj_fdb *fdb = &obj->u.fdb;
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->parent;
int err;

if (!ds->drv->port_fdb_getnext)
return -EOPNOTSUPP;

memset(fdb, 0, sizeof(*fdb));

for (;;) {
err = ds->drv->port_fdb_getnext(ds, p->port, &fdb->vid,
fdb->addr, &fdb->is_static);
if (err)
break;

err = obj->cb(dev, obj);
if (err)
break;
}

return err == -ENOENT ? 0 : err;
}

static int dsa_slave_port_obj_add(struct net_device *dev,
struct switchdev_obj *obj)
{
int err;

switch (obj->id) {
case SWITCHDEV_OBJ_PORT_FDB:
err = dsa_slave_port_fdb_add(dev, obj);
break;
default:
err = -EOPNOTSUPP;
break;
}

return err;
}

static int dsa_slave_port_obj_del(struct net_device *dev,
struct switchdev_obj *obj)
{
int err;

switch (obj->id) {
case SWITCHDEV_OBJ_PORT_FDB:
err = dsa_slave_port_fdb_del(dev, obj);
break;
default:
err = -EOPNOTSUPP;
break;
}

return err;
}

static int dsa_slave_port_obj_dump(struct net_device *dev,
struct switchdev_obj *obj)
{
int err;

switch (obj->id) {
case SWITCHDEV_OBJ_PORT_FDB:
err = dsa_slave_port_fdb_dump(dev, obj);
break;
default:
err = -EOPNOTSUPP;
break;
}

return err;
}

static int dsa_slave_bridge_port_join(struct net_device *dev,
struct net_device *br)
{
Expand Down Expand Up @@ -765,9 +776,9 @@ static const struct net_device_ops dsa_slave_netdev_ops = {
.ndo_change_rx_flags = dsa_slave_change_rx_flags,
.ndo_set_rx_mode = dsa_slave_set_rx_mode,
.ndo_set_mac_address = dsa_slave_set_mac_address,
.ndo_fdb_add = dsa_slave_fdb_add,
.ndo_fdb_del = dsa_slave_fdb_del,
.ndo_fdb_dump = dsa_slave_fdb_dump,
.ndo_fdb_add = switchdev_port_fdb_add,
.ndo_fdb_del = switchdev_port_fdb_del,
.ndo_fdb_dump = switchdev_port_fdb_dump,
.ndo_do_ioctl = dsa_slave_ioctl,
.ndo_get_iflink = dsa_slave_get_iflink,
#ifdef CONFIG_NET_POLL_CONTROLLER
Expand All @@ -780,6 +791,9 @@ static const struct net_device_ops dsa_slave_netdev_ops = {
static const struct switchdev_ops dsa_slave_switchdev_ops = {
.switchdev_port_attr_get = dsa_slave_port_attr_get,
.switchdev_port_attr_set = dsa_slave_port_attr_set,
.switchdev_port_obj_add = dsa_slave_port_obj_add,
.switchdev_port_obj_del = dsa_slave_port_obj_del,
.switchdev_port_obj_dump = dsa_slave_port_obj_dump,
};

static void dsa_slave_adjust_link(struct net_device *dev)
Expand Down

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