IB/addr: Pass network namespace as a parameter

Add network namespace support to the ib_addr module. For that, all the
address resolution and matching should be done using the appropriate
namespace instead of init_net.

This is achieved by:

1. Adding an explicit network namespace argument to exported function that
   require a namespace.
2. Saving the namespace in the rdma_addr_client structure.
3. Using it when calling networking functions.

In order to preserve the behavior of calling modules, &init_net is
passed as the parameter in calls from other modules. This is modified as
namespace support is added on more levels.

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: Guy Shapiro <guysh@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
index d3c42b3c1b5104e29657fce27803a3c7392ce70d..34b1adad07aacf92e9bbfa9621e084f2ec756f74 100644 (file)
--- a/drivers/infiniband/core/addr.c
+++ b/drivers/infiniband/core/addr.c
@@ -128,7 +128,7 @@ int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr,
        int ret = -EADDRNOTAVAIL;
 
        if (dev_addr->bound_dev_if) {
-               dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
+               dev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
                if (!dev)
                        return -ENODEV;
                ret = rdma_copy_addr(dev_addr, dev, NULL);
@@ -138,7 +138,7 @@ int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr,
 
        switch (addr->sa_family) {
        case AF_INET:
-               dev = ip_dev_find(&init_net,
+               dev = ip_dev_find(dev_addr->net,
                        ((struct sockaddr_in *) addr)->sin_addr.s_addr);
 
                if (!dev)
@@ -149,12 +149,11 @@ int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr,
                        *vlan_id = rdma_vlan_dev_vlan_id(dev);
                dev_put(dev);
                break;
-
 #if IS_ENABLED(CONFIG_IPV6)
        case AF_INET6:
                rcu_read_lock();
-               for_each_netdev_rcu(&init_net, dev) {
-                       if (ipv6_chk_addr(&init_net,
+               for_each_netdev_rcu(dev_addr->net, dev) {
+                       if (ipv6_chk_addr(dev_addr->net,
                                          &((struct sockaddr_in6 *) addr)->sin6_addr,
                                          dev, 1)) {
                                ret = rdma_copy_addr(dev_addr, dev, NULL);
@@ -236,7 +235,7 @@ static int addr4_resolve(struct sockaddr_in *src_in,
        fl4.daddr = dst_ip;
        fl4.saddr = src_ip;
        fl4.flowi4_oif = addr->bound_dev_if;
-       rt = ip_route_output_key(&init_net, &fl4);
+       rt = ip_route_output_key(addr->net, &fl4);
        if (IS_ERR(rt)) {
                ret = PTR_ERR(rt);
                goto out;
@@ -278,12 +277,12 @@ static int addr6_resolve(struct sockaddr_in6 *src_in,
        fl6.saddr = src_in->sin6_addr;
        fl6.flowi6_oif = addr->bound_dev_if;
 
-       dst = ip6_route_output(&init_net, NULL, &fl6);
+       dst = ip6_route_output(addr->net, NULL, &fl6);
        if ((ret = dst->error))
                goto put;
 
        if (ipv6_addr_any(&fl6.saddr)) {
-               ret = ipv6_dev_get_saddr(&init_net, ip6_dst_idev(dst)->dev,
+               ret = ipv6_dev_get_saddr(addr->net, ip6_dst_idev(dst)->dev,
                                         &fl6.daddr, 0, &fl6.saddr);
                if (ret)
                        goto put;
@@ -477,6 +476,7 @@ int rdma_addr_find_dmac_by_grh(const union ib_gid *sgid, const union ib_gid *dgi
 
        memset(&dev_addr, 0, sizeof(dev_addr));
        dev_addr.bound_dev_if = if_index;
+       dev_addr.net = &init_net;
 
        ctx.addr = &dev_addr;
        init_completion(&ctx.comp);
@@ -511,6 +511,7 @@ int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id)
        rdma_gid2ip(&gid_addr._sockaddr, sgid);
 
        memset(&dev_addr, 0, sizeof(dev_addr));
+       dev_addr.net = &init_net;
        ret = rdma_translate_ip(&gid_addr._sockaddr, &dev_addr, vlan_id);
        if (ret)
                return ret;

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index be41784a62e4816926c63c066af3b8e878d8f642..80a8b469a9a821ddc65def4f02611eac661a3015 100644 (file)
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -610,6 +610,7 @@ struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
        INIT_LIST_HEAD(&id_priv->listen_list);
        INIT_LIST_HEAD(&id_priv->mc_list);
        get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
+       id_priv->id.route.addr.dev_addr.net = &init_net;
 
        return &id_priv->id;
 }

diff --git a/include/rdma/ib_addr.h b/include/rdma/ib_addr.h
index 17e4a8bdecabec12d70845b89f9282107fbdd4d5..11528591d0d714f3ea1004566cb799952a9ca5bd 100644 (file)
--- a/include/rdma/ib_addr.h
+++ b/include/rdma/ib_addr.h
@@ -47,6 +47,7 @@
 #include <rdma/ib_verbs.h>
 #include <rdma/ib_pack.h>
 #include <net/ipv6.h>
+#include <net/net_namespace.h>
 
 struct rdma_addr_client {
        atomic_t refcount;
@@ -64,6 +65,16 @@ void rdma_addr_register_client(struct rdma_addr_client *client);
  */
 void rdma_addr_unregister_client(struct rdma_addr_client *client);
 
+/**
+ * struct rdma_dev_addr - Contains resolved RDMA hardware addresses
+ * @src_dev_addr:      Source MAC address.
+ * @dst_dev_addr:      Destination MAC address.
+ * @broadcast:         Broadcast address of the device.
+ * @dev_type:          The interface hardware type of the device.
+ * @bound_dev_if:      An optional device interface index.
+ * @transport:         The transport type used.
+ * @net:               Network namespace containing the bound_dev_if net_dev.
+ */
 struct rdma_dev_addr {
        unsigned char src_dev_addr[MAX_ADDR_LEN];
        unsigned char dst_dev_addr[MAX_ADDR_LEN];
@@ -71,11 +82,14 @@ struct rdma_dev_addr {
        unsigned short dev_type;
        int bound_dev_if;
        enum rdma_transport_type transport;
+       struct net *net;
 };
 
 /**
  * rdma_translate_ip - Translate a local IP address to an RDMA hardware
  *   address.
+ *
+ * The dev_addr->net field must be initialized.
  */
 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr,
                      u16 *vlan_id);
@@ -90,7 +104,7 @@ int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr,
  * @dst_addr: The destination address to resolve.
  * @addr: A reference to a data location that will receive the resolved
  *   addresses.  The data location must remain valid until the callback has
- *   been invoked.
+ *   been invoked. The net field of the addr struct must be valid.
  * @timeout_ms: Amount of time to wait for the address resolution to complete.
  * @callback: Call invoked once address resolution has completed, timed out,
  *   or been canceled.  A status of 0 indicates success.