tools: sync bpf.h

This adds BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE, and fixes up the

	error: enumeration value ‘BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE’ not handled in switch [-Werror=switch-enum]

build errors it would otherwise cause in libbpf.

Signed-off-by: Matt Mullins <mmullins@fb.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

3 files changed, 11 insertions, 1 deletions

diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 704bb69514a2..f7fa7a34a62d 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -168,6 +168,7 @@ enum bpf_prog_type {
         BPF_PROG_TYPE_SK_REUSEPORT,
         BPF_PROG_TYPE_FLOW_DISSECTOR,
         BPF_PROG_TYPE_CGROUP_SYSCTL,
+        BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE,
 };
 
 enum bpf_attach_type {
@@ -1737,12 +1738,19 @@ union bpf_attr {
  *              error if an eBPF program tries to set a callback that is not
  *              supported in the current kernel.
  *
- *              The supported callback values that *argval* can combine are:
+ *              *argval* is a flag array which can combine these flags:
  *
  *              * **BPF_SOCK_OPS_RTO_CB_FLAG** (retransmission time out)
  *              * **BPF_SOCK_OPS_RETRANS_CB_FLAG** (retransmission)
  *              * **BPF_SOCK_OPS_STATE_CB_FLAG** (TCP state change)
  *
+ *              Therefore, this function can be used to clear a callback flag by
+ *              setting the appropriate bit to zero. e.g. to disable the RTO
+ *              callback:
+ *
+ *              **bpf_sock_ops_cb_flags_set(bpf_sock,**
+ *                      **bpf_sock->bpf_sock_ops_cb_flags & ~BPF_SOCK_OPS_RTO_CB_FLAG)**
+ *
  *              Here are some examples of where one could call such eBPF
  *              program:
  *
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 9052061ba7fc..11a65db4b93f 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -2136,6 +2136,7 @@ static bool bpf_prog_type__needs_kver(enum bpf_prog_type type)
         case BPF_PROG_TYPE_UNSPEC:
         case BPF_PROG_TYPE_TRACEPOINT:
         case BPF_PROG_TYPE_RAW_TRACEPOINT:
+        case BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE:
         case BPF_PROG_TYPE_PERF_EVENT:
         case BPF_PROG_TYPE_CGROUP_SYSCTL:
                 return false;
diff --git a/tools/lib/bpf/libbpf_probes.c b/tools/lib/bpf/libbpf_probes.c
index 0f25541632e3..80ee922f290c 100644
--- a/tools/lib/bpf/libbpf_probes.c
+++ b/tools/lib/bpf/libbpf_probes.c
@@ -93,6 +93,7 @@ probe_load(enum bpf_prog_type prog_type, const struct bpf_insn *insns,
         case BPF_PROG_TYPE_CGROUP_DEVICE:
         case BPF_PROG_TYPE_SK_MSG:
         case BPF_PROG_TYPE_RAW_TRACEPOINT:
+        case BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE:
         case BPF_PROG_TYPE_LWT_SEG6LOCAL:
         case BPF_PROG_TYPE_LIRC_MODE2:
         case BPF_PROG_TYPE_SK_REUSEPORT: