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RDMA/core Introduce and use rdma_find_ndev_for_src_ip_rcu

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This fixes two issues:
1. When address family is other than IPv4 or v6, rdma_translate_ip()
   returns success which is incorrect.
2. When address familty is AF_INET6, and if the source address is not
   found, it returns success, which is also incorrect.

Therefore, introduce and use rdma_find_ndev_for_src_ip_rcu() helper
function which returns correct success or error status and is also useful
for future code refactor in addr_resolve().

Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Parav Pandit 2018-09-05 12:54:16 +03:00 committed by Jason Gunthorpe
parent 99ed748e87
commit caf1e3ae9f
1 changed files with 35 additions and 26 deletions
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61
drivers/infiniband/core/addr.c
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@ -232,6 +232,36 @@ void rdma_copy_addr(struct rdma_dev_addr *dev_addr,
}
EXPORT_SYMBOL(rdma_copy_addr);
static struct net_device *
rdma_find_ndev_for_src_ip_rcu(struct net *net, const struct sockaddr *src_in)
{
struct net_device *dev = NULL;
int ret = -EADDRNOTAVAIL;
switch (src_in->sa_family) {
case AF_INET:
dev = __ip_dev_find(net,
((const struct sockaddr_in *)src_in)->sin_addr.s_addr,
false);
if (dev)
ret = 0;
break;
#if IS_ENABLED(CONFIG_IPV6)
case AF_INET6:
for_each_netdev_rcu(net, dev) {
if (ipv6_chk_addr(net,
&((const struct sockaddr_in6 *)src_in)->sin6_addr,
dev, 1)) {
ret = 0;
break;
}
}
break;
#endif
}
return ret ? ERR_PTR(ret) : dev;
}
int rdma_translate_ip(const struct sockaddr *addr,
struct rdma_dev_addr *dev_addr)
{
@ -246,33 +276,12 @@ int rdma_translate_ip(const struct sockaddr *addr,
return 0;
}
switch (addr->sa_family) {
case AF_INET:
dev = ip_dev_find(dev_addr->net,
((const struct sockaddr_in *)addr)->sin_addr.s_addr);
if (!dev)
return -EADDRNOTAVAIL;
rcu_read_lock();
dev = rdma_find_ndev_for_src_ip_rcu(dev_addr->net, addr);
if (!IS_ERR(dev))
rdma_copy_addr(dev_addr, dev, NULL);
dev_put(dev);
break;
#if IS_ENABLED(CONFIG_IPV6)
case AF_INET6:
rcu_read_lock();
for_each_netdev_rcu(dev_addr->net, dev) {
if (ipv6_chk_addr(dev_addr->net,
&((const struct sockaddr_in6 *)addr)->sin6_addr,
dev, 1)) {
rdma_copy_addr(dev_addr, dev, NULL);
break;
}
}
rcu_read_unlock();
break;
#endif
}
return 0;
rcu_read_unlock();
return PTR_ERR_OR_ZERO(dev);
}
EXPORT_SYMBOL(rdma_translate_ip);