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authorAlexei Starovoitov <ast@kernel.org>2021-05-14 03:36:03 +0300
committerDaniel Borkmann <daniel@iogearbox.net>2021-05-19 01:33:39 +0300
commit79a7f8bdb159d9914b58740f3d31d602a6e4aca8 (patch)
tree4713544ec684ad91106265a60d4275e96a9e9064 /tools/include
parentfa7b83bf3b156c767f3e4a25bbf3817b08f3ff8e (diff)
downloadlinux-79a7f8bdb159d9914b58740f3d31d602a6e4aca8.tar.xz
bpf: Introduce bpf_sys_bpf() helper and program type.
Add placeholders for bpf_sys_bpf() helper and new program type. Make sure to check that expected_attach_type is zero for future extensibility. Allow tracing helper functions to be used in this program type, since they will only execute from user context via bpf_prog_test_run. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210514003623.28033-2-alexei.starovoitov@gmail.com
Diffstat (limited to 'tools/include')
-rw-r--r--tools/include/uapi/linux/bpf.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index ec6d85a81744..c92648f38144 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -937,6 +937,7 @@ enum bpf_prog_type {
BPF_PROG_TYPE_EXT,
BPF_PROG_TYPE_LSM,
BPF_PROG_TYPE_SK_LOOKUP,
+ BPF_PROG_TYPE_SYSCALL, /* a program that can execute syscalls */
};
enum bpf_attach_type {
@@ -4735,6 +4736,12 @@ union bpf_attr {
* be zero-terminated except when **str_size** is 0.
*
* Or **-EBUSY** if the per-CPU memory copy buffer is busy.
+ *
+ * long bpf_sys_bpf(u32 cmd, void *attr, u32 attr_size)
+ * Description
+ * Execute bpf syscall with given arguments.
+ * Return
+ * A syscall result.
*/
#define __BPF_FUNC_MAPPER(FN) \
FN(unspec), \
@@ -4903,6 +4910,7 @@ union bpf_attr {
FN(check_mtu), \
FN(for_each_map_elem), \
FN(snprintf), \
+ FN(sys_bpf), \
/* */
/* integer value in 'imm' field of BPF_CALL instruction selects which helper