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Message-Id: <1423667204-8807-5-git-send-email-raindel@mellanox.com>
Date: Wed, 11 Feb 2015 17:06:38 +0200
From: Shachar Raindel <raindel@...lanox.com>
To: roland@...nel.org, sean.hefty@...el.com
Cc: linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
liranl@...lanox.com, guysh@...lanox.com, haggaie@...lanox.com,
yotamke@...lanox.com, raindel@...lanox.com
Subject: [PATCH v1 04/10] IB/ipoib: Return IPoIB devices as possible matches to get_net_device_by_port_pkey_ip
From: Guy Shapiro <guysh@...lanox.com>
Implement 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@...lanox.com>
Signed-off-by: Haggai Eran <haggaie@...lanox.com>
Signed-off-by: Yotam Kenneth <yotamke@...lanox.com>
Signed-off-by: Shachar Raindel <raindel@...lanox.com>
---
drivers/infiniband/ulp/ipoib/ipoib_main.c | 122 +++++++++++++++++++++++++++++-
1 file changed, 121 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index 58b5aa3..63119ff 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -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 +94,15 @@ 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);
static void ipoib_neigh_reclaim(struct rcu_head *rp);
+static struct net_device *ipoib_get_net_device_by_port_pkey_ip(
+ struct ib_device *dev, u8 port, u16 pkey,
+ struct sockaddr *addr);
static struct ib_client ipoib_client = {
.name = "ipoib",
.add = ipoib_add_one,
- .remove = ipoib_remove_one
+ .remove = ipoib_remove_one,
+ .get_net_device_by_port_pkey_ip = ipoib_get_net_device_by_port_pkey_ip,
};
int ipoib_open(struct net_device *dev)
@@ -222,6 +229,119 @@ static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
return 0;
}
+static bool ipoib_is_dev_match_addr(struct sockaddr *addr,
+ struct net_device *dev)
+{
+ struct net *net = dev_net(dev);
+
+ if (addr->sa_family == AF_INET) {
+ struct in_device *in_dev = in_dev_get(dev);
+ struct sockaddr_in *addr_in = (struct sockaddr_in *)addr;
+ __be32 ret_addr;
+
+ 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;
+ }
+#if IS_ENABLED(CONFIG_IPV6)
+ else if (addr->sa_family == AF_INET6) {
+ struct sockaddr_in6 *addr_in6 = (struct sockaddr_in6 *)addr;
+
+ if (ipv6_chk_addr(net, &addr_in6->sin6_addr, dev, 1))
+ return true;
+ }
+#endif
+ return false;
+}
+
+/**
+ * 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(struct sockaddr *addr,
+ struct net_device *dev)
+{
+ struct net_device *upper,
+ *result = NULL;
+ struct list_head *iter;
+
+ if (ipoib_is_dev_match_addr(addr, dev)) {
+ dev_hold(dev);
+ return dev;
+ }
+
+ rcu_read_lock();
+ netdev_for_each_all_upper_dev_rcu(dev, upper, iter) {
+ if (ipoib_is_dev_match_addr(addr, upper)) {
+ dev_hold(upper);
+ result = upper;
+ break;
+ }
+ }
+ rcu_read_unlock();
+ return result;
+}
+
+static struct net_device *ipoib_get_net_device_by_port_pkey_ip(
+ struct ib_device *dev, u8 port, u16 pkey, struct sockaddr *addr)
+{
+ struct ipoib_dev_priv *priv;
+ struct list_head *dev_list;
+ u16 pkey_index;
+
+ ib_find_cached_pkey(dev, port, pkey, &pkey_index);
+ if (pkey_index == (u16)-1)
+ return NULL;
+
+ if (rdma_node_get_transport(dev->node_type) != RDMA_TRANSPORT_IB)
+ return NULL;
+
+ dev_list = ib_get_client_data(dev, &ipoib_client);
+ if (!dev_list)
+ return NULL;
+
+ list_for_each_entry(priv, dev_list, list) {
+ struct net_device *net_dev = NULL;
+ struct ipoib_dev_priv *child_priv;
+
+ if (priv->port != port)
+ continue;
+
+ if (priv->pkey_index == pkey_index) {
+ net_dev = ipoib_get_net_dev_match_addr(addr, priv->dev);
+ if (net_dev)
+ return net_dev;
+ }
+
+ down_read(&priv->vlan_rwsem);
+ list_for_each_entry(child_priv,
+ &priv->child_intfs, list) {
+ if (child_priv->pkey_index != pkey_index)
+ continue;
+
+ net_dev = ipoib_get_net_dev_match_addr(
+ addr, child_priv->dev);
+ if (net_dev)
+ break;
+ }
+ up_read(&priv->vlan_rwsem);
+ if (net_dev)
+ return net_dev;
+ }
+ return NULL;
+}
+
int ipoib_set_mode(struct net_device *dev, const char *buf)
{
struct ipoib_dev_priv *priv = netdev_priv(dev);
--
1.7.11.2
--
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