From: Hou Tao <houtao1@xxxxxxxxxx>
Add bpf_dynptr_user_init() to initialize a bpf_dynptr_user object,
bpf_dynptr_user_{data,size}() to get the address and length of the
dynptr object, and bpf_dynptr_user_set_size() to set the its size.
Instead of exporting these symbols, simply adding these helpers as
inline functions in bpf.h.
Signed-off-by: Hou Tao <houtao1@xxxxxxxxxx>
---
tools/lib/bpf/bpf.h | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index a4a7b1ad1b63..92b4afac5f5f 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -700,6 +700,33 @@ struct bpf_token_create_opts {
LIBBPF_API int bpf_token_create(int bpffs_fd,
struct bpf_token_create_opts *opts);
+/* sys_bpf() will check the validity of data and size */
+static inline void bpf_dynptr_user_init(void *data, __u32 size,
+ struct bpf_dynptr_user *dynptr)
+{
+ dynptr->data = (__u64)(unsigned long)data;
+ dynptr->size = size;
+ dynptr->rsvd = 0;
+}
+
+static inline void bpf_dynptr_user_set_size(struct bpf_dynptr_user *dynptr,
+ __u32 new_size)
+{
+ dynptr->size = new_size;
+}
+
+static inline __u32
+bpf_dynptr_user_size(const struct bpf_dynptr_user *dynptr)
+{
+ return dynptr->size;
+}
+
+static inline void *
+bpf_dynptr_user_data(const struct bpf_dynptr_user *dynptr)
+{
+ return (void *)(unsigned long)dynptr->data;
+}
+
#ifdef __cplusplus
} /* extern "C" */
#endif
--
2.44.0
