From mboxrd@z Thu Jan 1 00:00:00 1970 From: Haggai Eran Subject: [PATCH 02/11] IB/ipoib: Return IPoIB devices matching connection parameters Date: Mon, 15 Jun 2015 11:47:07 +0300 Message-ID: <1434358036-15526-3-git-send-email-haggaie@mellanox.com> References: <1434358036-15526-1-git-send-email-haggaie@mellanox.com> Return-path: In-Reply-To: <1434358036-15526-1-git-send-email-haggaie-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Doug Ledford Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Liran Liss , Guy Shapiro , Shachar Raindel , Yotam Kenneth , Jason Gunthorpe , Haggai Eran List-Id: linux-rdma@vger.kernel.org From: Guy Shapiro 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 Signed-off-by: Haggai Eran Signed-off-by: Yotam Kenneth Signed-off-by: Shachar Raindel --- drivers/infiniband/ulp/ipoib/ipoib_main.c | 141 +++++++++++++++++++++++++++++- 1 file changed, 140 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index da149c278cb8..15af32665a87 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -48,6 +48,9 @@ #include #include +#include +#include +#include #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_dev_by_params( + struct ib_device *dev, u8 port, u16 pkey, + const union ib_gid *gid, const 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_dev_by_params = ipoib_get_net_dev_by_params, }; int ipoib_open(struct net_device *dev) @@ -222,6 +229,138 @@ 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(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 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(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(addr, upper)) { + dev_hold(upper); + result = upper; + break; + } + } +out: + rcu_read_unlock(); + return result; +} + +/* returns an IPoIB netdev on top a given ipoib device matching a pkey_index + * and address, if one exists. */ +static struct net_device *ipoib_match_gid_pkey_addr(struct ipoib_dev_priv *priv, + const union ib_gid *gid, + u16 pkey_index, + const struct sockaddr *addr) +{ + struct ipoib_dev_priv *child_priv; + struct net_device *net_dev = NULL; + + if (priv->pkey_index == pkey_index && + (!gid || !memcmp(gid, &priv->local_gid, sizeof(*gid)))) { + net_dev = ipoib_get_net_dev_match_addr(addr, priv->dev); + if (net_dev) + return net_dev; + } + + /* Check child interfaces */ + down_read(&priv->vlan_rwsem); + list_for_each_entry(child_priv, &priv->child_intfs, list) { + net_dev = ipoib_match_gid_pkey_addr(child_priv, gid, + pkey_index, addr); + if (net_dev) + break; + } + up_read(&priv->vlan_rwsem); + + return net_dev; +} + +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) +{ + struct ipoib_dev_priv *priv; + struct list_head *dev_list; + struct net_device *net_dev; + u16 pkey_index; + int ret; + + ret = ib_find_cached_pkey(dev, port, pkey, &pkey_index); + if (ret) + return NULL; + + if (!rdma_protocol_ib(dev, port)) + return NULL; + + dev_list = ib_get_client_data(dev, &ipoib_client); + if (!dev_list) + return NULL; + + list_for_each_entry(priv, dev_list, list) { + if (priv->port != port) + continue; + + net_dev = ipoib_match_gid_pkey_addr(priv, gid, pkey_index, + addr); + 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 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html