From: Or Gerlitz Date: Thu, 1 Mar 2012 10:17:51 +0000 (+0200) Subject: IB/core: Add raw packet QP type X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c938a616aadb621b8e26b0ac09ac13d053c7ed1c;p=linux-beck.git IB/core: Add raw packet QP type IB_QPT_RAW_PACKET allows applications to build a complete packet, including L2 headers, when sending; on the receive side, the HW will not strip any headers. This QP type is designed for userspace direct access to Ethernet; for example by applications that do TCP/IP themselves. Only processes with the NET_RAW capability are allowed to create raw packet QPs (the name "raw packet QP" is supposed to suggest an analogy to AF_PACKET / SOL_RAW sockets). Signed-off-by: Or Gerlitz Reviewed-by: Sean Hefty Signed-off-by: Roland Dreier --- diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index 4d27e4c3fe34..7d801e6252f1 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -1399,6 +1399,9 @@ ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file, if (copy_from_user(&cmd, buf, sizeof cmd)) return -EFAULT; + if (cmd.qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW)) + return -EPERM; + INIT_UDATA(&udata, buf + sizeof cmd, (unsigned long) cmd.response + sizeof resp, in_len - sizeof cmd, out_len - sizeof resp); diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index 575b78045aaf..140f9a5d492f 100644 --- a/drivers/infiniband/core/verbs.c +++ b/drivers/infiniband/core/verbs.c @@ -479,6 +479,7 @@ static const struct { [IB_QPT_UD] = (IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY), + [IB_QPT_RAW_PACKET] = IB_QP_PORT, [IB_QPT_UC] = (IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_ACCESS_FLAGS), diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index c3cca5a4dacd..a3fa3232b8a0 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -605,7 +605,7 @@ enum ib_qp_type { IB_QPT_UD, IB_QPT_RAW_IPV6, IB_QPT_RAW_ETHERTYPE, - /* Save 8 for RAW_PACKET */ + IB_QPT_RAW_PACKET = 8, IB_QPT_XRC_INI = 9, IB_QPT_XRC_TGT, IB_QPT_MAX