From ffa0c1cf59596fba54546ea828305acfcc2cf55e Mon Sep 17 00:00:00 2001 From: Yonghong Song Date: Sat, 15 Dec 2018 22:13:52 -0800 Subject: bpf: enable cgroup local storage map pretty print with kind_flag Commit 970289fc0a83 ("bpf: add bpffs pretty print for cgroup local storage maps") added bpffs pretty print for cgroup local storage maps. The commit worked for struct without kind_flag set. This patch refactored and made pretty print also work with kind_flag set for the struct. Acked-by: Martin KaFai Lau Signed-off-by: Yonghong Song Signed-off-by: Daniel Borkmann --- kernel/bpf/local_storage.c | 17 ++++------------- 1 file changed, 4 insertions(+), 13 deletions(-) (limited to 'kernel/bpf/local_storage.c') diff --git a/kernel/bpf/local_storage.c b/kernel/bpf/local_storage.c index 5eca03da0989..07a34ef562a0 100644 --- a/kernel/bpf/local_storage.c +++ b/kernel/bpf/local_storage.c @@ -315,9 +315,8 @@ static int cgroup_storage_check_btf(const struct bpf_map *map, const struct btf_type *key_type, const struct btf_type *value_type) { - const struct btf_type *t; struct btf_member *m; - u32 id, size; + u32 offset, size; /* Key is expected to be of struct bpf_cgroup_storage_key type, * which is: @@ -338,25 +337,17 @@ static int cgroup_storage_check_btf(const struct bpf_map *map, * The first field must be a 64 bit integer at 0 offset. */ m = (struct btf_member *)(key_type + 1); - if (m->offset) - return -EINVAL; - id = m->type; - t = btf_type_id_size(btf, &id, NULL); size = FIELD_SIZEOF(struct bpf_cgroup_storage_key, cgroup_inode_id); - if (!t || !btf_type_is_reg_int(t, size)) + if (!btf_member_is_reg_int(btf, key_type, m, 0, size)) return -EINVAL; /* * The second field must be a 32 bit integer at 64 bit offset. */ m++; - if (m->offset != offsetof(struct bpf_cgroup_storage_key, attach_type) * - BITS_PER_BYTE) - return -EINVAL; - id = m->type; - t = btf_type_id_size(btf, &id, NULL); + offset = offsetof(struct bpf_cgroup_storage_key, attach_type); size = FIELD_SIZEOF(struct bpf_cgroup_storage_key, attach_type); - if (!t || !btf_type_is_reg_int(t, size)) + if (!btf_member_is_reg_int(btf, key_type, m, offset, size)) return -EINVAL; return 0; -- cgit