AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-25 04:30:52 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

IB/core: Don't resolve IP address to the loopback device

Browse Source 
When resolving an IP address that is on the host of the caller the
result from querying the routing table is the loopback device. This is
not a valid response, because it doesn't represent the RDMA device and
the port.

Therefore, callers need to check the resolved device and if it is a
loopback device find an alternative way to resolve it. To avoid this we
make sure that the response from rdma_resolve_ip() will not be the
loopback device.

While that, we fix an static checker warning about dereferencing an
unintitialized pointer using the same solution as in commit abeffce90c
("net/mlx5e: Fix a -Wmaybe-uninitialized warning") as a reference.

Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Moni Shoua 2017-05-23 10:48:45 +03:00 committed by Doug Ledford
parent bebb2a473a
commit cbd09aebc2
3 changed files with 32 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
drivers/infiniband/core/addr.c
View File

@ -268,6 +268,7 @@ int rdma_translate_ip(const struct sockaddr *addr,
return ret;
ret = rdma_copy_addr(dev_addr, dev, NULL);
dev_addr->bound_dev_if = dev->ifindex;
if (vlan_id)
*vlan_id = rdma_vlan_dev_vlan_id(dev);
dev_put(dev);
@ -280,6 +281,7 @@ int rdma_translate_ip(const struct sockaddr *addr,
&((const struct sockaddr_in6 *)addr)->sin6_addr,
dev, 1)) {
ret = rdma_copy_addr(dev_addr, dev, NULL);
dev_addr->bound_dev_if = dev->ifindex;
if (vlan_id)
*vlan_id = rdma_vlan_dev_vlan_id(dev);
break;
@ -405,10 +407,10 @@ static int addr4_resolve(struct sockaddr_in *src_in,
fl4.saddr = src_ip;
fl4.flowi4_oif = addr->bound_dev_if;
rt = ip_route_output_key(addr->net, &fl4);
if (IS_ERR(rt)) {
ret = PTR_ERR(rt);
goto out;
}
ret = PTR_ERR_OR_ZERO(rt);
if (ret)
return ret;
src_in->sin_family = AF_INET;
src_in->sin_addr.s_addr = fl4.saddr;
@ -423,8 +425,6 @@ static int addr4_resolve(struct sockaddr_in *src_in,
*prt = rt;
return 0;
out:
return ret;
}
#if IS_ENABLED(CONFIG_IPV6)
@ -527,8 +527,12 @@ static int addr_resolve(struct sockaddr *src_in,
if (resolve_neigh)
ret = addr_resolve_neigh(&rt->dst, dst_in, addr, seq);
ndev = rt->dst.dev;
dev_hold(ndev);
if (addr->bound_dev_if) {
ndev = dev_get_by_index(addr->net, addr->bound_dev_if);
} else {
ndev = rt->dst.dev;
dev_hold(ndev);
}
ip_rt_put(rt);
} else {
@ -544,13 +548,27 @@ static int addr_resolve(struct sockaddr *src_in,
if (resolve_neigh)
ret = addr_resolve_neigh(dst, dst_in, addr, seq);
ndev = dst->dev;
dev_hold(ndev);
if (addr->bound_dev_if) {
ndev = dev_get_by_index(addr->net, addr->bound_dev_if);
} else {
ndev = dst->dev;
dev_hold(ndev);
}
dst_release(dst);
}
addr->bound_dev_if = ndev->ifindex;
if (ndev->flags & IFF_LOOPBACK) {
ret = rdma_translate_ip(dst_in, addr, NULL);
/*
* Put the loopback device and get the translated
* device instead.
*/
dev_put(ndev);
ndev = dev_get_by_index(addr->net, addr->bound_dev_if);
} else {
addr->bound_dev_if = ndev->ifindex;
}
dev_put(ndev);
return ret;

32
drivers/infiniband/core/cma.c
View File

@ -623,22 +623,11 @@ static inline int cma_validate_port(struct ib_device *device, u8 port,
if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
return ret;
if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port))
ndev = dev_get_by_index(&init_net, bound_if_index);
if (ndev && ndev->flags & IFF_LOOPBACK) {
pr_info("detected loopback device\n");
dev_put(ndev);
if (!device->get_netdev)
return -EOPNOTSUPP;
ndev = device->get_netdev(device, port);
if (!ndev)
return -ENODEV;
}
} else {
else
gid_type = IB_GID_TYPE_IB;
}
ret = ib_find_cached_gid_by_port(device, gid, gid_type, port,
ndev, NULL);
@ -2569,21 +2558,6 @@ static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
goto err2;
}
if (ndev->flags & IFF_LOOPBACK) {
dev_put(ndev);
if (!id_priv->id.device->get_netdev) {
ret = -EOPNOTSUPP;
goto err2;
}
ndev = id_priv->id.device->get_netdev(id_priv->id.device,
id_priv->id.port_num);
if (!ndev) {
ret = -ENODEV;
goto err2;
}
}
supported_gids = roce_gid_type_mask_support(id_priv->id.device,
id_priv->id.port_num);
gid_type = cma_route_gid_type(addr->dev_addr.network,

5
drivers/infiniband/core/verbs.c
View File

@ -520,11 +520,6 @@ int ib_init_ah_from_wc(struct ib_device *device, u8 port_num,
}
resolved_dev = dev_get_by_index(&init_net, if_index);
if (resolved_dev->flags & IFF_LOOPBACK) {
dev_put(resolved_dev);
resolved_dev = idev;
dev_hold(resolved_dev);
}
rcu_read_lock();
if (resolved_dev != idev && !rdma_is_upper_dev_rcu(idev,
resolved_dev))