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| author | Yonghong Song <yhs@fb.com> | 2020-05-09 10:59:09 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-05-09 17:05:26 -0700 |
| commit | 6086d29def80edd78f9832ea6eafa74e3818f6a7 (patch) | |
| tree | abaedb47ce4edee0744294fef6e1bfecb69856ab /kernel/bpf/syscall.c | |
| parent | e5158d987b72c3f318b4b52a01ac6f3997bd0c00 (diff) | |
| download | linux-6086d29def80edd78f9832ea6eafa74e3818f6a7.tar.bz2 | |
bpf: Add bpf_map iterator
Implement seq_file operations to traverse all bpf_maps.
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200509175909.2476096-1-yhs@fb.com
Diffstat (limited to 'kernel/bpf/syscall.c')
| -rw-r--r-- | kernel/bpf/syscall.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index a293e88ee01a..de2a75500233 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -2934,6 +2934,25 @@ static int bpf_obj_get_next_id(const union bpf_attr *attr, return err; } +struct bpf_map *bpf_map_get_curr_or_next(u32 *id) +{ + struct bpf_map *map; + + spin_lock_bh(&map_idr_lock); +again: + map = idr_get_next(&map_idr, id); + if (map) { + map = __bpf_map_inc_not_zero(map, false); + if (IS_ERR(map)) { + (*id)++; + goto again; + } + } + spin_unlock_bh(&map_idr_lock); + + return map; +} + #define BPF_PROG_GET_FD_BY_ID_LAST_FIELD prog_id struct bpf_prog *bpf_prog_by_id(u32 id) |