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RDMA/cma: Replace net_device pointer with index

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Provide the device interface when resolving route information to
ensure that the correct outbound device is used.  This will also
simplify processing of sin6_scope_id for IPv6 support.

Based on work from:
David Wilder <dwilder@us.ibm.com>
Jason Gunthorpe <jgunthrope@obsidianresearch.com>

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Sean Hefty 2009-11-19 12:55:22 -08:00 committed by Roland Dreier
parent e2e626972e
commit 6266ed6e41
3 changed files with 15 additions and 3 deletions
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14
drivers/infiniband/core/addr.c
View file

@ -107,7 +107,7 @@ int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
memcpy(dev_addr->broadcast, dev->broadcast, MAX_ADDR_LEN);
if (dst_dev_addr)
memcpy(dev_addr->dst_dev_addr, dst_dev_addr, MAX_ADDR_LEN);
dev_addr->src_dev = dev;
dev_addr->bound_dev_if = dev->ifindex;
return 0;
}
EXPORT_SYMBOL(rdma_copy_addr);
@ -117,6 +117,15 @@ int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
struct net_device *dev;
int ret = -EADDRNOTAVAIL;
if (dev_addr->bound_dev_if) {
dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
if (!dev)
return -ENODEV;
ret = rdma_copy_addr(dev_addr, dev, NULL);
dev_put(dev);
return ret;
}
switch (addr->sa_family) {
case AF_INET:
dev = ip_dev_find(&init_net,
@ -231,6 +240,8 @@ static int addr4_resolve_remote(struct sockaddr_in *src_in,
memset(&fl, 0, sizeof fl);
fl.nl_u.ip4_u.daddr = dst_ip;
fl.nl_u.ip4_u.saddr = src_ip;
fl.oif = addr->bound_dev_if;
ret = ip_route_output_key(&init_net, &rt, &fl);
if (ret)
goto out;
@ -279,6 +290,7 @@ static int addr6_resolve_remote(struct sockaddr_in6 *src_in,
memset(&fl, 0, sizeof fl);
fl.nl_u.ip6_u.daddr = dst_in->sin6_addr;
fl.nl_u.ip6_u.saddr = src_in->sin6_addr;
fl.oif = addr->bound_dev_if;
dst = ip6_route_output(&init_net, NULL, &fl);
if (!dst)

2
drivers/infiniband/core/cma.c
View file

@ -2820,7 +2820,7 @@ static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id
dev_addr = &id_priv->id.route.addr.dev_addr;
if ((dev_addr->src_dev == ndev) &&
if ((dev_addr->bound_dev_if == ndev->ifindex) &&
memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
ndev->name, &id_priv->id);

2
include/rdma/ib_addr.h
View file

@ -61,7 +61,7 @@ struct rdma_dev_addr {
unsigned char dst_dev_addr[MAX_ADDR_LEN];
unsigned char broadcast[MAX_ADDR_LEN];
enum rdma_node_type dev_type;
struct net_device *src_dev;
int bound_dev_if;
};
/**