IB/core: Add raw packet QP type (c938a616) · Commits · 戴 / test

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 <ogerlitz@mellanox.com> Reviewed-by:

Sean Hefty <sean.hefty@intel.com> Signed-off-by:

Roland Dreier <roland@purestorage.com>

drivers/infiniband/core/uverbs_cmd.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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);

drivers/infiniband/core/verbs.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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),

include/rdma/ib_verbs.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -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

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