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bpf: Make btf_load command to be bpfptr_t compatible.

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Similar to prog_load make btf_load command to be availble to
bpf_prog_type_syscall program.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210514003623.28033-7-alexei.starovoitov@gmail.com
This commit is contained in:
Alexei Starovoitov 2021-05-13 17:36:08 -07:00 • committed by Daniel Borkmann
parent 00899e7e8d
commit c571bd752e
3 changed files with 9 additions and 8 deletions
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7
kernel/bpf/syscall.c
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@ -3842,7 +3842,7 @@ static int bpf_obj_get_info_by_fd(const union bpf_attr *attr,
#define BPF_BTF_LOAD_LAST_FIELD btf_log_level
static int bpf_btf_load(const union bpf_attr *attr)
static int bpf_btf_load(const union bpf_attr *attr, bpfptr_t uattr)
{
if (CHECK_ATTR(BPF_BTF_LOAD))
return -EINVAL;
@ -3850,7 +3850,7 @@ static int bpf_btf_load(const union bpf_attr *attr)
if (!bpf_capable())
return -EPERM;
return btf_new_fd(attr);
return btf_new_fd(attr, uattr);
}
#define BPF_BTF_GET_FD_BY_ID_LAST_FIELD btf_id
@ -4471,7 +4471,7 @@ static int __sys_bpf(int cmd, bpfptr_t uattr, unsigned int size)
err = bpf_raw_tracepoint_open(&attr);
break;
case BPF_BTF_LOAD:
err = bpf_btf_load(&attr);
err = bpf_btf_load(&attr, uattr);
break;
case BPF_BTF_GET_FD_BY_ID:
err = bpf_btf_get_fd_by_id(&attr);
@ -4552,6 +4552,7 @@ BPF_CALL_3(bpf_sys_bpf, int, cmd, void *, attr, u32, attr_size)
case BPF_MAP_UPDATE_ELEM:
case BPF_MAP_FREEZE:
case BPF_PROG_LOAD:
case BPF_BTF_LOAD:
break;
/* case BPF_PROG_TEST_RUN:
* is not part of this list to prevent recursive test_run