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| author | Alexei Starovoitov <ast@kernel.org> | 2019-01-31 15:40:05 -0800 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-02-01 20:55:38 +0100 |
| commit | e16d2f1ab96849b4b65e64b82550a7ecdbf405eb (patch) | |
| tree | c5bb1bfee577712f7a0c1312716b2fb573560c74 | |
| parent | d83525ca62cf8ebe3271d14c36fb900c294274a2 (diff) | |
| download | talos-op-linux-e16d2f1ab96849b4b65e64b82550a7ecdbf405eb.tar.gz talos-op-linux-e16d2f1ab96849b4b65e64b82550a7ecdbf405eb.zip | |
bpf: add support for bpf_spin_lock to cgroup local storage
Allow 'struct bpf_spin_lock' to reside inside cgroup local storage.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
| -rw-r--r-- | kernel/bpf/local_storage.c | 2 | ||||
| -rw-r--r-- | kernel/bpf/syscall.c | 3 | ||||
| -rw-r--r-- | kernel/bpf/verifier.c | 2 |
3 files changed, 6 insertions, 1 deletions
diff --git a/kernel/bpf/local_storage.c b/kernel/bpf/local_storage.c index 07a34ef562a0..0295427f06e2 100644 --- a/kernel/bpf/local_storage.c +++ b/kernel/bpf/local_storage.c @@ -147,6 +147,7 @@ static int cgroup_storage_update_elem(struct bpf_map *map, void *_key, return -ENOMEM; memcpy(&new->data[0], value, map->value_size); + check_and_init_map_lock(map, new->data); new = xchg(&storage->buf, new); kfree_rcu(new, rcu); @@ -483,6 +484,7 @@ struct bpf_cgroup_storage *bpf_cgroup_storage_alloc(struct bpf_prog *prog, storage->buf = kmalloc_node(size, flags, map->numa_node); if (!storage->buf) goto enomem; + check_and_init_map_lock(map, storage->buf->data); } else { storage->percpu_buf = __alloc_percpu_gfp(size, 8, flags); if (!storage->percpu_buf) diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index ebf0a673cb83..b29e6dc44650 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -482,7 +482,8 @@ static int map_check_btf(struct bpf_map *map, const struct btf *btf, if (map_value_has_spin_lock(map)) { if (map->map_type != BPF_MAP_TYPE_HASH && - map->map_type != BPF_MAP_TYPE_ARRAY) + map->map_type != BPF_MAP_TYPE_ARRAY && + map->map_type != BPF_MAP_TYPE_CGROUP_STORAGE) return -ENOTSUPP; if (map->spin_lock_off + sizeof(struct bpf_spin_lock) > map->value_size) { diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 38892bdee651..b63bc77af2d1 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -3089,6 +3089,8 @@ static int check_helper_call(struct bpf_verifier_env *env, int func_id, int insn regs[BPF_REG_0].map_ptr = meta.map_ptr; if (fn->ret_type == RET_PTR_TO_MAP_VALUE) { regs[BPF_REG_0].type = PTR_TO_MAP_VALUE; + if (map_value_has_spin_lock(meta.map_ptr)) + regs[BPF_REG_0].id = ++env->id_gen; } else { regs[BPF_REG_0].type = PTR_TO_MAP_VALUE_OR_NULL; regs[BPF_REG_0].id = ++env->id_gen; |
