From: Toke Høiland-Jørgensen <toke@xxxxxxxxxx>
This updates the bpf.h UAPI header in tools/ to add the bpf chain
call-related definitions.
Signed-off-by: Toke Høiland-Jørgensen <toke@xxxxxxxxxx>
---
tools/include/uapi/linux/bpf.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 77c6be96d676..b5dbc49fa1a3 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -107,6 +107,9 @@ enum bpf_cmd {
BPF_MAP_LOOKUP_AND_DELETE_ELEM,
BPF_MAP_FREEZE,
BPF_BTF_GET_NEXT_ID,
+ BPF_PROG_CHAIN_ADD,
+ BPF_PROG_CHAIN_DEL,
+ BPF_PROG_CHAIN_GET,
};
enum bpf_map_type {
@@ -288,6 +291,12 @@ enum bpf_attach_type {
/* The verifier internal test flag. Behavior is undefined */
#define BPF_F_TEST_STATE_FREQ (1U << 3)
+/* Whether to enable chain call injection at program return. If set, the
+ * verifier will rewrite program returns to check for and jump to chain call
+ * programs configured with the BPF_PROG_CHAIN_* commands to the bpf syscall.
+ */
+#define BPF_F_INJECT_CHAIN_CALLS (1U << 4)
+
/* When BPF ldimm64's insn[0].src_reg != 0 then this can have
* two extensions:
*
@@ -510,6 +519,13 @@ union bpf_attr {
__u64 probe_offset; /* output: probe_offset */
__u64 probe_addr; /* output: probe_addr */
} task_fd_query;
+
+ struct { /* anonymous struct used by BPF_PROG_CHAIN_* commands */
+ __u32 prev_prog_fd;
+ __u32 next_prog_fd;
+ __u32 retcode;
+ __u32 next_prog_id; /* output: prog_id */
+ };
} __attribute__((aligned(8)));
/* The description below is an attempt at providing documentation to eBPF
