mirror of
https://github.com/torvalds/linux.git
synced 2024-12-17 00:21:32 +00:00
IB/ipoib: Return IPoIB devices matching connection parameters
Implement the get_net_device_by_port_pkey_ip callback that returns network device to ib_core according to connection parameters. Check the ipoib device and iterate over all child devices to look for a match. For each IPoIB device we iterate through all upper devices when searching for a matching IP, in order to support bonding. Signed-off-by: Guy Shapiro <guysh@mellanox.com> Signed-off-by: Haggai Eran <haggaie@mellanox.com> Signed-off-by: Yotam Kenneth <yotamke@mellanox.com> Signed-off-by: Shachar Raindel <raindel@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
parent
9268f72dcb
commit
ddde896e56
@ -48,6 +48,9 @@
|
||||
|
||||
#include <linux/jhash.h>
|
||||
#include <net/arp.h>
|
||||
#include <net/addrconf.h>
|
||||
#include <linux/inetdevice.h>
|
||||
#include <rdma/ib_cache.h>
|
||||
|
||||
#define DRV_VERSION "1.0.0"
|
||||
|
||||
@ -91,11 +94,16 @@ struct ib_sa_client ipoib_sa_client;
|
||||
static void ipoib_add_one(struct ib_device *device);
|
||||
static void ipoib_remove_one(struct ib_device *device, void *client_data);
|
||||
static void ipoib_neigh_reclaim(struct rcu_head *rp);
|
||||
static struct net_device *ipoib_get_net_dev_by_params(
|
||||
struct ib_device *dev, u8 port, u16 pkey,
|
||||
const union ib_gid *gid, const struct sockaddr *addr,
|
||||
void *client_data);
|
||||
|
||||
static struct ib_client ipoib_client = {
|
||||
.name = "ipoib",
|
||||
.add = ipoib_add_one,
|
||||
.remove = ipoib_remove_one
|
||||
.remove = ipoib_remove_one,
|
||||
.get_net_dev_by_params = ipoib_get_net_dev_by_params,
|
||||
};
|
||||
|
||||
int ipoib_open(struct net_device *dev)
|
||||
@ -222,6 +230,225 @@ static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Called with an RCU read lock taken */
|
||||
static bool ipoib_is_dev_match_addr_rcu(const struct sockaddr *addr,
|
||||
struct net_device *dev)
|
||||
{
|
||||
struct net *net = dev_net(dev);
|
||||
struct in_device *in_dev;
|
||||
struct sockaddr_in *addr_in = (struct sockaddr_in *)addr;
|
||||
struct sockaddr_in6 *addr_in6 = (struct sockaddr_in6 *)addr;
|
||||
__be32 ret_addr;
|
||||
|
||||
switch (addr->sa_family) {
|
||||
case AF_INET:
|
||||
in_dev = in_dev_get(dev);
|
||||
if (!in_dev)
|
||||
return false;
|
||||
|
||||
ret_addr = inet_confirm_addr(net, in_dev, 0,
|
||||
addr_in->sin_addr.s_addr,
|
||||
RT_SCOPE_HOST);
|
||||
in_dev_put(in_dev);
|
||||
if (ret_addr)
|
||||
return true;
|
||||
|
||||
break;
|
||||
case AF_INET6:
|
||||
if (IS_ENABLED(CONFIG_IPV6) &&
|
||||
ipv6_chk_addr(net, &addr_in6->sin6_addr, dev, 1))
|
||||
return true;
|
||||
|
||||
break;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Find the master net_device on top of the given net_device.
|
||||
* @dev: base IPoIB net_device
|
||||
*
|
||||
* Returns the master net_device with a reference held, or the same net_device
|
||||
* if no master exists.
|
||||
*/
|
||||
static struct net_device *ipoib_get_master_net_dev(struct net_device *dev)
|
||||
{
|
||||
struct net_device *master;
|
||||
|
||||
rcu_read_lock();
|
||||
master = netdev_master_upper_dev_get_rcu(dev);
|
||||
if (master)
|
||||
dev_hold(master);
|
||||
rcu_read_unlock();
|
||||
|
||||
if (master)
|
||||
return master;
|
||||
|
||||
dev_hold(dev);
|
||||
return dev;
|
||||
}
|
||||
|
||||
/**
|
||||
* Find a net_device matching the given address, which is an upper device of
|
||||
* the given net_device.
|
||||
* @addr: IP address to look for.
|
||||
* @dev: base IPoIB net_device
|
||||
*
|
||||
* If found, returns the net_device with a reference held. Otherwise return
|
||||
* NULL.
|
||||
*/
|
||||
static struct net_device *ipoib_get_net_dev_match_addr(
|
||||
const struct sockaddr *addr, struct net_device *dev)
|
||||
{
|
||||
struct net_device *upper,
|
||||
*result = NULL;
|
||||
struct list_head *iter;
|
||||
|
||||
rcu_read_lock();
|
||||
if (ipoib_is_dev_match_addr_rcu(addr, dev)) {
|
||||
dev_hold(dev);
|
||||
result = dev;
|
||||
goto out;
|
||||
}
|
||||
|
||||
netdev_for_each_all_upper_dev_rcu(dev, upper, iter) {
|
||||
if (ipoib_is_dev_match_addr_rcu(addr, upper)) {
|
||||
dev_hold(upper);
|
||||
result = upper;
|
||||
break;
|
||||
}
|
||||
}
|
||||
out:
|
||||
rcu_read_unlock();
|
||||
return result;
|
||||
}
|
||||
|
||||
/* returns the number of IPoIB netdevs on top a given ipoib device matching a
|
||||
* pkey_index and address, if one exists.
|
||||
*
|
||||
* @found_net_dev: contains a matching net_device if the return value >= 1,
|
||||
* with a reference held. */
|
||||
static int ipoib_match_gid_pkey_addr(struct ipoib_dev_priv *priv,
|
||||
const union ib_gid *gid,
|
||||
u16 pkey_index,
|
||||
const struct sockaddr *addr,
|
||||
int nesting,
|
||||
struct net_device **found_net_dev)
|
||||
{
|
||||
struct ipoib_dev_priv *child_priv;
|
||||
struct net_device *net_dev = NULL;
|
||||
int matches = 0;
|
||||
|
||||
if (priv->pkey_index == pkey_index &&
|
||||
(!gid || !memcmp(gid, &priv->local_gid, sizeof(*gid)))) {
|
||||
if (!addr) {
|
||||
net_dev = ipoib_get_master_net_dev(priv->dev);
|
||||
} else {
|
||||
/* Verify the net_device matches the IP address, as
|
||||
* IPoIB child devices currently share a GID. */
|
||||
net_dev = ipoib_get_net_dev_match_addr(addr, priv->dev);
|
||||
}
|
||||
if (net_dev) {
|
||||
if (!*found_net_dev)
|
||||
*found_net_dev = net_dev;
|
||||
else
|
||||
dev_put(net_dev);
|
||||
++matches;
|
||||
}
|
||||
}
|
||||
|
||||
/* Check child interfaces */
|
||||
down_read_nested(&priv->vlan_rwsem, nesting);
|
||||
list_for_each_entry(child_priv, &priv->child_intfs, list) {
|
||||
matches += ipoib_match_gid_pkey_addr(child_priv, gid,
|
||||
pkey_index, addr,
|
||||
nesting + 1,
|
||||
found_net_dev);
|
||||
if (matches > 1)
|
||||
break;
|
||||
}
|
||||
up_read(&priv->vlan_rwsem);
|
||||
|
||||
return matches;
|
||||
}
|
||||
|
||||
/* Returns the number of matching net_devs found (between 0 and 2). Also
|
||||
* return the matching net_device in the @net_dev parameter, holding a
|
||||
* reference to the net_device, if the number of matches >= 1 */
|
||||
static int __ipoib_get_net_dev_by_params(struct list_head *dev_list, u8 port,
|
||||
u16 pkey_index,
|
||||
const union ib_gid *gid,
|
||||
const struct sockaddr *addr,
|
||||
struct net_device **net_dev)
|
||||
{
|
||||
struct ipoib_dev_priv *priv;
|
||||
int matches = 0;
|
||||
|
||||
*net_dev = NULL;
|
||||
|
||||
list_for_each_entry(priv, dev_list, list) {
|
||||
if (priv->port != port)
|
||||
continue;
|
||||
|
||||
matches += ipoib_match_gid_pkey_addr(priv, gid, pkey_index,
|
||||
addr, 0, net_dev);
|
||||
if (matches > 1)
|
||||
break;
|
||||
}
|
||||
|
||||
return matches;
|
||||
}
|
||||
|
||||
static struct net_device *ipoib_get_net_dev_by_params(
|
||||
struct ib_device *dev, u8 port, u16 pkey,
|
||||
const union ib_gid *gid, const struct sockaddr *addr,
|
||||
void *client_data)
|
||||
{
|
||||
struct net_device *net_dev;
|
||||
struct list_head *dev_list = client_data;
|
||||
u16 pkey_index;
|
||||
int matches;
|
||||
int ret;
|
||||
|
||||
if (!rdma_protocol_ib(dev, port))
|
||||
return NULL;
|
||||
|
||||
ret = ib_find_cached_pkey(dev, port, pkey, &pkey_index);
|
||||
if (ret)
|
||||
return NULL;
|
||||
|
||||
if (!dev_list)
|
||||
return NULL;
|
||||
|
||||
/* See if we can find a unique device matching the L2 parameters */
|
||||
matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index,
|
||||
gid, NULL, &net_dev);
|
||||
|
||||
switch (matches) {
|
||||
case 0:
|
||||
return NULL;
|
||||
case 1:
|
||||
return net_dev;
|
||||
}
|
||||
|
||||
dev_put(net_dev);
|
||||
|
||||
/* Couldn't find a unique device with L2 parameters only. Use L3
|
||||
* address to uniquely match the net device */
|
||||
matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index,
|
||||
gid, addr, &net_dev);
|
||||
switch (matches) {
|
||||
case 0:
|
||||
return NULL;
|
||||
default:
|
||||
dev_warn_ratelimited(&dev->dev,
|
||||
"duplicate IP address detected\n");
|
||||
/* Fall through */
|
||||
case 1:
|
||||
return net_dev;
|
||||
}
|
||||
}
|
||||
|
||||
int ipoib_set_mode(struct net_device *dev, const char *buf)
|
||||
{
|
||||
struct ipoib_dev_priv *priv = netdev_priv(dev);
|
||||
|
Loading…
Reference in New Issue
Block a user