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| author | Menglong Dong <imagedong@tencent.com> | 2022-04-25 21:32:47 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2022-04-26 11:35:21 -0700 |
| commit | c317ab71facc2cd0a94145973318a4c914e11acc (patch) | |
| tree | 62a429e18068504f46d091d8423e9c4f39d633e7 /kernel/bpf/local_storage.c | |
| parent | 367590b7fccc2c317026abe7d29923322d959781 (diff) | |
| download | linux-c317ab71facc2cd0a94145973318a4c914e11acc.tar.bz2 | |
bpf: Compute map_btf_id during build time
For now, the field 'map_btf_id' in 'struct bpf_map_ops' for all map
types are computed during vmlinux-btf init:
btf_parse_vmlinux() -> btf_vmlinux_map_ids_init()
It will lookup the btf_type according to the 'map_btf_name' field in
'struct bpf_map_ops'. This process can be done during build time,
thanks to Jiri's resolve_btfids.
selftest of map_ptr has passed:
$96 map_ptr:OK
Summary: 1/0 PASSED, 0 SKIPPED, 0 FAILED
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel/bpf/local_storage.c')
| -rw-r--r-- | kernel/bpf/local_storage.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/bpf/local_storage.c b/kernel/bpf/local_storage.c index 497916060ac7..8654fc97f5fe 100644 --- a/kernel/bpf/local_storage.c +++ b/kernel/bpf/local_storage.c @@ -9,6 +9,7 @@ #include <linux/rbtree.h> #include <linux/slab.h> #include <uapi/linux/btf.h> +#include <linux/btf_ids.h> #ifdef CONFIG_CGROUP_BPF @@ -446,7 +447,8 @@ static void cgroup_storage_seq_show_elem(struct bpf_map *map, void *key, rcu_read_unlock(); } -static int cgroup_storage_map_btf_id; +BTF_ID_LIST_SINGLE(cgroup_storage_map_btf_ids, struct, + bpf_cgroup_storage_map) const struct bpf_map_ops cgroup_storage_map_ops = { .map_alloc = cgroup_storage_map_alloc, .map_free = cgroup_storage_map_free, @@ -456,8 +458,7 @@ const struct bpf_map_ops cgroup_storage_map_ops = { .map_delete_elem = cgroup_storage_delete_elem, .map_check_btf = cgroup_storage_check_btf, .map_seq_show_elem = cgroup_storage_seq_show_elem, - .map_btf_name = "bpf_cgroup_storage_map", - .map_btf_id = &cgroup_storage_map_btf_id, + .map_btf_id = &cgroup_storage_map_btf_ids[0], }; int bpf_cgroup_storage_assign(struct bpf_prog_aux *aux, struct bpf_map *_map) |