diff options
Diffstat (limited to 'drivers/infiniband/core/cache.c')
| -rw-r--r-- | drivers/infiniband/core/cache.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c index 7499e7016e38..c164e377e563 100644 --- a/drivers/infiniband/core/cache.c +++ b/drivers/infiniband/core/cache.c @@ -1250,6 +1250,61 @@ struct net_device *rdma_read_gid_attr_ndev_rcu(const struct ib_gid_attr *attr) return ndev; } +static int get_lower_dev_vlan(struct net_device *lower_dev, void *data) +{ + u16 *vlan_id = data; + + if (is_vlan_dev(lower_dev)) + *vlan_id = vlan_dev_vlan_id(lower_dev); + + /* We are interested only in first level vlan device, so + * always return 1 to stop iterating over next level devices. + */ + return 1; +} + +/** + * rdma_read_gid_l2_fields - Read the vlan ID and source MAC address + * of a GID entry. + * + * @attr: GID attribute pointer whose L2 fields to be read + * @vlan_id: Pointer to vlan id to fill up if the GID entry has + * vlan id. It is optional. + * @smac: Pointer to smac to fill up for a GID entry. It is optional. + * + * rdma_read_gid_l2_fields() returns 0 on success and returns vlan id + * (if gid entry has vlan) and source MAC, or returns error. + */ +int rdma_read_gid_l2_fields(const struct ib_gid_attr *attr, + u16 *vlan_id, u8 *smac) +{ + struct net_device *ndev; + + ndev = attr->ndev; + if (!ndev) + return -EINVAL; + + if (smac) + ether_addr_copy(smac, ndev->dev_addr); + if (vlan_id) { + *vlan_id = 0xffff; + if (is_vlan_dev(ndev)) { + *vlan_id = vlan_dev_vlan_id(ndev); + } else { + /* If the netdev is upper device and if it's lower + * device is vlan device, consider vlan id of the + * the lower vlan device for this gid entry. + */ + rcu_read_lock(); + netdev_walk_all_lower_dev_rcu(attr->ndev, + get_lower_dev_vlan, vlan_id); + rcu_read_unlock(); + } + } + return 0; +} +EXPORT_SYMBOL(rdma_read_gid_l2_fields); + static int config_non_roce_gid_cache(struct ib_device *device, u8 port, int gid_tbl_len) { |