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authorOr Gerlitz <ogerlitz@mellanox.com>2012-03-01 12:17:51 +0200
committerRoland Dreier <roland@purestorage.com>2012-05-08 11:18:09 -0700
commitc938a616aadb621b8e26b0ac09ac13d053c7ed1c (patch)
tree85144d93d117f9d31a589385d65f36f061648b8f /drivers/infiniband
parentd48b97b403d23f6df0b990cee652bdf9a52337a3 (diff)
downloadtalos-op-linux-c938a616aadb621b8e26b0ac09ac13d053c7ed1c.tar.gz
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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 <ogerlitz@mellanox.com> Reviewed-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/core/uverbs_cmd.c3
-rw-r--r--drivers/infiniband/core/verbs.c1
2 files changed, 4 insertions, 0 deletions
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),
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