diff options
| -rw-r--r-- | drivers/infiniband/core/device.c | 46 | ||||
| -rw-r--r-- | include/rdma/ib_verbs.h | 27 |
2 files changed, 73 insertions, 0 deletions
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c index ce317e623862..a9a27816991a 100644 --- a/drivers/infiniband/core/device.c +++ b/drivers/infiniband/core/device.c @@ -38,6 +38,7 @@ #include <linux/slab.h> #include <linux/init.h> #include <linux/mutex.h> +#include <linux/netdevice.h> #include <rdma/rdma_netlink.h> #include "core_priv.h" @@ -780,6 +781,51 @@ int ib_find_pkey(struct ib_device *device, } EXPORT_SYMBOL(ib_find_pkey); +/** + * ib_get_net_dev_by_params() - Return the appropriate net_dev + * for a received CM request + * @dev: An RDMA device on which the request has been received. + * @port: Port number on the RDMA device. + * @pkey: The Pkey the request came on. + * @gid: A GID that the net_dev uses to communicate. + * @addr: Contains the IP address that the request specified as its + * destination. + */ +struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, + u8 port, + u16 pkey, + const union ib_gid *gid, + const struct sockaddr *addr) +{ + struct net_device *net_dev = NULL; + struct ib_client_data *context; + + if (!rdma_protocol_ib(dev, port)) + return NULL; + + down_read(&lists_rwsem); + + list_for_each_entry(context, &dev->client_data_list, list) { + struct ib_client *client = context->client; + + if (context->going_down) + continue; + + if (client->get_net_dev_by_params) { + net_dev = client->get_net_dev_by_params(dev, port, pkey, + gid, addr, + context->data); + if (net_dev) + break; + } + } + + up_read(&lists_rwsem); + + return net_dev; +} +EXPORT_SYMBOL(ib_get_net_dev_by_params); + static int __init ib_core_init(void) { int ret; diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 449609b70928..fd7a6950df75 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -48,6 +48,7 @@ #include <linux/rwsem.h> #include <linux/scatterlist.h> #include <linux/workqueue.h> +#include <linux/socket.h> #include <uapi/linux/if_ether.h> #include <linux/atomic.h> @@ -1765,6 +1766,28 @@ struct ib_client { void (*add) (struct ib_device *); void (*remove)(struct ib_device *, void *client_data); + /* Returns the net_dev belonging to this ib_client and matching the + * given parameters. + * @dev: An RDMA device that the net_dev use for communication. + * @port: A physical port number on the RDMA device. + * @pkey: P_Key that the net_dev uses if applicable. + * @gid: A GID that the net_dev uses to communicate. + * @addr: An IP address the net_dev is configured with. + * @client_data: The device's client data set by ib_set_client_data(). + * + * An ib_client that implements a net_dev on top of RDMA devices + * (such as IP over IB) should implement this callback, allowing the + * rdma_cm module to find the right net_dev for a given request. + * + * The caller is responsible for calling dev_put on the returned + * netdev. */ + struct net_device *(*get_net_dev_by_params)( + struct ib_device *dev, + u8 port, + u16 pkey, + const union ib_gid *gid, + const struct sockaddr *addr, + void *client_data); struct list_head list; }; @@ -3014,4 +3037,8 @@ static inline int ib_check_mr_access(int flags) int ib_check_mr_status(struct ib_mr *mr, u32 check_mask, struct ib_mr_status *mr_status); +struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, u8 port, + u16 pkey, const union ib_gid *gid, + const struct sockaddr *addr); + #endif /* IB_VERBS_H */ |