IB/core: Remove ib_uverbs_flow_spec structure from userspace

The structure holding any types of flow_spec is of no use to
userspace.  It would be wrong for userspace to do:

  struct ib_uverbs_flow_spec flow_spec;

  flow_spec.type = IB_FLOW_SPEC_TCP;
  flow_spec.size = sizeof(flow_spec);

Instead, userspace should use the dedicated flow_spec structure for
  - Ethernet : struct ib_uverbs_flow_spec_eth,
  - IPv4     : struct ib_uverbs_flow_spec_ipv4,
  - TCP/UDP  : struct ib_uverbs_flow_spec_tcp_udp.

In other words, struct ib_uverbs_flow_spec is a "virtual" data
structure that can only be use by the kernel as an alias to the other.

Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Link: http://marc.info/?i=cover.1383773832.git.ydroneaud@opteya.com
Signed-off-by: Roland Dreier <roland@purestorage.com>

diff --git a/drivers/infiniband/core/uverbs.h b/drivers/infiniband/core/uverbs.h
index d8f9c6c..777954f 100644 (file)
--- a/drivers/infiniband/core/uverbs.h
+++ b/drivers/infiniband/core/uverbs.h
@@ -178,6 +178,22 @@ void ib_uverbs_event_handler(struct ib_event_handler *handler,
                             struct ib_event *event);
 void ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev, struct ib_xrcd *xrcd);
 
+struct ib_uverbs_flow_spec {
+       union {
+               union {
+                       struct ib_uverbs_flow_spec_hdr hdr;
+                       struct {
+                               __u32 type;
+                               __u16 size;
+                               __u16 reserved;
+                       };
+               };
+               struct ib_uverbs_flow_spec_eth     eth;
+               struct ib_uverbs_flow_spec_ipv4    ipv4;
+               struct ib_uverbs_flow_spec_tcp_udp tcp_udp;
+       };
+};
+
 #define IB_UVERBS_DECLARE_CMD(name)                                    \
        ssize_t ib_uverbs_##name(struct ib_uverbs_file *file,           \
                                 const char __user *buf, int in_len,    \

diff --git a/include/uapi/rdma/ib_user_verbs.h b/include/uapi/rdma/ib_user_verbs.h
index 4301498..fc9bbe3 100644 (file)
--- a/include/uapi/rdma/ib_user_verbs.h
+++ b/include/uapi/rdma/ib_user_verbs.h
@@ -765,22 +765,6 @@ struct ib_uverbs_flow_spec_tcp_udp {
        struct ib_uverbs_flow_tcp_udp_filter mask;
 };
 
-struct ib_uverbs_flow_spec {
-       union {
-               union {
-                       struct ib_uverbs_flow_spec_hdr hdr;
-                       struct {
-                               __u32 type;
-                               __u16 size;
-                               __u16 reserved;
-                       };
-               };
-               struct ib_uverbs_flow_spec_eth      eth;
-               struct ib_uverbs_flow_spec_ipv4    ipv4;
-               struct ib_uverbs_flow_spec_tcp_udp tcp_udp;
-       };
-};
-
 struct ib_uverbs_flow_attr {
        __u32 type;
        __u16 size;