XDP declarations are moved from ebpf_nethooks.h. (#3793)

* Initial commit

* Merge with main

* Removed ebpf_xdp_test_hooks.h in net_ebpf_ext.h

* Removed header not needed

* Addressed PR comments

* Addressed PR comments

* Addressed PR comments

* Keeping the change with SEC(xdp)

* Generated sample files

* Added the generated tests/bpf2c_tests/expected files

* Fixed the output expectation

* Generated expected files after main merge

* Re-push all the generated file

docs/tutorial.md

@@ -491,7 +491,7 @@ structure which contains an arbitrary amount of data.  (Tail calls to
 programs can have more than one argument, but hooks put all the info in a
 hook-specific context structure passed as one argument.)
 
-The "xdp_test" hook point has the following prototype in `ebpf_nethooks.h`:
+The "xdp_test" hook point has the following prototype in `net_ebpf_ext_xdp_hooks.h`:
 
 ```c
 typedef struct xdp_md
@@ -517,6 +517,7 @@ A sample eBPF program might look like this:
 ```c
 #include "bpf_helpers.h"
 #include "ebpf_nethooks.h"
+#include "net_ebpf_ext_xdp_hooks.h"
 
 // Put "xdp_test" in the section name to specify XDP_TEST as the hook.
 // The SEC macro below has the same effect as the

include/ebpf_nethooks.h

@@ -6,64 +6,10 @@
 // This file contains APIs for hooks and helpers that are
 // exposed by netebpfext.sys for use by eBPF programs.
 
-// XDP_TEST hook.  We use "struct xdp_md" for cross-platform compatibility.
-typedef struct xdp_md_
-{
-    void* data;               ///< Pointer to start of packet data.
-    void* data_end;           ///< Pointer to end of packet data.
-    uint64_t data_meta;       ///< Packet metadata.
-    uint32_t ingress_ifindex; ///< Ingress interface index.
-
-    /* size: 26, cachelines: 1, members: 4 */
-    /* last cacheline: 26 bytes */
-} xdp_md_t;
-
-typedef enum _xdp_action
-{
-    XDP_PASS = 1, ///< Allow the packet to pass.
-    XDP_DROP,     ///< Drop the packet.
-    XDP_TX        ///< Bounce the received packet back out the same NIC it arrived on.
-} xdp_action_t;
-
-/**
- * @brief Handle an incoming packet as early as possible.
- *
- * Program type: \ref EBPF_PROGRAM_TYPE_XDP_TEST
- *
- * @param[in] context Packet metadata.
- * @retval XDP_PASS Allow the packet to pass.
- * @retval XDP_DROP Drop the packet.
- * @retval XDP_TX Bounce the received packet back out the same NIC it arrived on.
- */
-typedef xdp_action_t
-xdp_hook_t(xdp_md_t* context);
-
-// XDP_TEST helper functions.
-#define XDP_EXT_HELPER_FN_BASE 0xFFFF
-
 #ifndef __doxygen
 #define EBPF_HELPER(return_type, name, args) typedef return_type(*const name##_t) args
 #endif
 
-typedef enum
-{
-    BPF_FUNC_xdp_adjust_head = XDP_EXT_HELPER_FN_BASE + 1,
-} ebpf_nethook_helper_id_t;
-
-/**
- * @brief Adjust XDP_TEST context data pointer.
- *
- * @param[in] ctx XDP_TEST context.
- * @param[in] delta Number of bytes to move the data pointer by.
- *
- * @retval 0 The operation was successful.
- * @retval <0 A failure occurred.
- */
-EBPF_HELPER(int, bpf_xdp_adjust_head, (xdp_md_t * ctx, int delta));
-#ifndef __doxygen
-#define bpf_xdp_adjust_head ((bpf_xdp_adjust_head_t)BPF_FUNC_xdp_adjust_head)
-#endif
-
 // BIND hook
 
 typedef enum _bind_operation

netebpfext/net_ebpf_ext_program_info.h

@@ -6,6 +6,7 @@
 #include "ebpf_nethooks.h"
 #include "ebpf_program_types.h"
 #include "ebpf_shared_framework.h"
+#include "net_ebpf_ext_xdp_hooks.h"
 
 #define XDP_EXT_HELPER_FUNCTION_START EBPF_MAX_GENERAL_HELPER_FUNCTION
 

netebpfext/net_ebpf_ext_xdp_hooks.h

@@ -0,0 +1,65 @@
+// Copyright (c) eBPF for Windows contributors
+// SPDX-License-Identifier: MIT
+#pragma once
+#include <stdint.h>
+
+// This file contains APIs for hooks and helpers that are
+// exposed by netebpfext.sys for use by eBPF xdp test programs.
+
+// XDP_TEST hook.
+typedef struct xdp_md_
+{
+    void* data;               ///< Pointer to start of packet data.
+    void* data_end;           ///< Pointer to end of packet data.
+    uint64_t data_meta;       ///< Packet metadata.
+    uint32_t ingress_ifindex; ///< Ingress interface index.
+
+    /* size: 26, cachelines: 1, members: 4 */
+    /* last cacheline: 26 bytes */
+} xdp_md_t;
+
+typedef enum _xdp_action
+{
+    XDP_PASS = 1, ///< Allow the packet to pass.
+    XDP_DROP,     ///< Drop the packet.
+    XDP_TX        ///< Bounce the received packet back out the same NIC it arrived on.
+} xdp_action_t;
+
+/**
+ * @brief Handle an incoming packet as early as possible.
+ *
+ * Program type: \ref EBPF_PROGRAM_TYPE_XDP_TEST
+ *
+ * @param[in] context Packet metadata.
+ * @retval XDP_PASS Allow the packet to pass.
+ * @retval XDP_DROP Drop the packet.
+ * @retval XDP_TX Bounce the received packet back out the same NIC it arrived on.
+ */
+typedef xdp_action_t
+xdp_hook_t(xdp_md_t* context);
+
+// XDP_TEST helper functions.
+#define XDP_EXT_HELPER_FN_BASE 0xFFFF
+
+#ifndef __doxygen
+#define EBPF_HELPER(return_type, name, args) typedef return_type(*const name##_t) args
+#endif
+
+typedef enum
+{
+    BPF_FUNC_xdp_adjust_head = XDP_EXT_HELPER_FN_BASE + 1,
+} ebpf_nethook_helper_id_t;
+
+/**
+ * @brief Adjust XDP_TEST context data pointer.
+ *
+ * @param[in] ctx XDP_TEST context.
+ * @param[in] delta Number of bytes to move the data pointer by.
+ *
+ * @retval 0 The operation was successful.
+ * @retval <0 A failure occurred.
+ */
+EBPF_HELPER(int, bpf_xdp_adjust_head, (xdp_md_t * ctx, int delta));
+#ifndef __doxygen
+#define bpf_xdp_adjust_head ((bpf_xdp_adjust_head_t)BPF_FUNC_xdp_adjust_head)
+#endif