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| author | Yonghong Song <yhs@fb.com> | 2022-11-23 21:32:11 -0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2022-11-24 12:27:13 -0800 |
| commit | 01685c5bddaa6df3d662c8afed5e5289fcc68e5a (patch) | |
| tree | 449b395cbda9dc78cb39ae8cd1bfe15ee0e1aa16 /kernel/bpf/helpers.c | |
| parent | 5a0f663f0189cf9e031e444f97c029717a99548d (diff) | |
| download | lwn-01685c5bddaa6df3d662c8afed5e5289fcc68e5a.tar.gz lwn-01685c5bddaa6df3d662c8afed5e5289fcc68e5a.zip | |
bpf: Introduce might_sleep field in bpf_func_proto
Introduce bpf_func_proto->might_sleep to indicate a particular helper
might sleep. This will make later check whether a helper might be
sleepable or not easier.
Acked-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20221124053211.2373553-1-yhs@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel/bpf/helpers.c')
| -rw-r--r-- | kernel/bpf/helpers.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index 2299bb0d89e5..9296b654dbd7 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -661,6 +661,7 @@ BPF_CALL_3(bpf_copy_from_user, void *, dst, u32, size, const struct bpf_func_proto bpf_copy_from_user_proto = { .func = bpf_copy_from_user, .gpl_only = false, + .might_sleep = true, .ret_type = RET_INTEGER, .arg1_type = ARG_PTR_TO_UNINIT_MEM, .arg2_type = ARG_CONST_SIZE_OR_ZERO, @@ -691,6 +692,7 @@ BPF_CALL_5(bpf_copy_from_user_task, void *, dst, u32, size, const struct bpf_func_proto bpf_copy_from_user_task_proto = { .func = bpf_copy_from_user_task, .gpl_only = true, + .might_sleep = true, .ret_type = RET_INTEGER, .arg1_type = ARG_PTR_TO_UNINIT_MEM, .arg2_type = ARG_CONST_SIZE_OR_ZERO, |