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libbpf: add "prog_flags" to bpf_program/bpf_prog_load_attr/bpf_load_program_attr 

libbpf doesn't allow passing "prog_flags" during bpf program load in a
couple of load related APIs, "bpf_load_program_xattr", "load_program" and
"bpf_prog_load_xattr".

It makes sense to allow passing "prog_flags" which is useful for
customizing program loading.

Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jiong Wang 2019-05-24 23:25:19 +01:00 committed by Alexei Starovoitov
parent d6c2308c74
commit 046561981b
4 changed files with 6 additions and 0 deletions
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1
tools/lib/bpf/bpf.c
View File

@ -256,6 +256,7 @@ int bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr,
if (load_attr->name)
memcpy(attr.prog_name, load_attr->name,
min(strlen(load_attr->name), BPF_OBJ_NAME_LEN - 1));
attr.prog_flags = load_attr->prog_flags;
fd = sys_bpf_prog_load(&attr, sizeof(attr));
if (fd >= 0)

1
tools/lib/bpf/bpf.h
View File

@ -87,6 +87,7 @@ struct bpf_load_program_attr {
const void *line_info;
__u32 line_info_cnt;
__u32 log_level;
__u32 prog_flags;
};
/* Flags to direct loading requirements */

3
tools/lib/bpf/libbpf.c
View File

@ -188,6 +188,7 @@ struct bpf_program {
void *line_info;
__u32 line_info_rec_size;
__u32 line_info_cnt;
__u32 prog_flags;
};
enum libbpf_map_type {
@ -2076,6 +2077,7 @@ load_program(struct bpf_program *prog, struct bpf_insn *insns, int insns_cnt,
load_attr.line_info_rec_size = prog->line_info_rec_size;
load_attr.line_info_cnt = prog->line_info_cnt;
load_attr.log_level = prog->log_level;
load_attr.prog_flags = prog->prog_flags;
if (!load_attr.insns || !load_attr.insns_cnt)
return -EINVAL;
@ -3521,6 +3523,7 @@ int bpf_prog_load_xattr(const struct bpf_prog_load_attr *attr,
expected_attach_type);
prog->log_level = attr->log_level;
prog->prog_flags = attr->prog_flags;
if (!first_prog)
first_prog = prog;
}

1
tools/lib/bpf/libbpf.h
View File

@ -320,6 +320,7 @@ struct bpf_prog_load_attr {
enum bpf_attach_type expected_attach_type;
int ifindex;
int log_level;
int prog_flags;
};
LIBBPF_API int bpf_prog_load_xattr(const struct bpf_prog_load_attr *attr,