1 files changed, 15 insertions, 1 deletions

diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 23e2031a43d4..597afdbc1ab9 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -2268,6 +2268,19 @@ union bpf_attr {
  *
  *      Return
  *              0 on success, or a negative error in case of failure.
+ *
+ * int bpf_msg_pop_data(struct sk_msg_buff *msg, u32 start, u32 pop, u64 flags)
+ *       Description
+ *              Will remove *pop* bytes from a *msg* starting at byte *start*.
+ *              This may result in **ENOMEM** errors under certain situations if
+ *              an allocation and copy are required due to a full ring buffer.
+ *              However, the helper will try to avoid doing the allocation
+ *              if possible. Other errors can occur if input parameters are
+ *              invalid either due to *start* byte not being valid part of msg
+ *              payload and/or *pop* value being to large.
+ *
+ *      Return
+ *              0 on success, or a negative erro in case of failure.
  */
 #define __BPF_FUNC_MAPPER(FN)           \
         FN(unspec),                     \
@@ -2360,7 +2373,8 @@ union bpf_attr {
         FN(map_push_elem),              \
         FN(map_pop_elem),               \
         FN(map_peek_elem),              \
-        FN(msg_push_data),
+        FN(msg_push_data),              \
+        FN(msg_pop_data),
 
 /* integer value in 'imm' field of BPF_CALL instruction selects which helper
  * function eBPF program intends to call