diff options
author | Johannes Berg <johannes.berg@intel.com> | 2017-04-11 15:34:57 +0200 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2017-04-11 14:38:43 -0400 |
commit | be9370a7d8614d1fa54649c75de14458e79b91ec (patch) | |
tree | 69ab002234e93207d87ad9864028557919c791df /kernel/bpf/syscall.c | |
parent | 98601e8bc62d41659eb6478d2f66fb35361597ac (diff) | |
download | linux-be9370a7d8614d1fa54649c75de14458e79b91ec.tar.gz linux-be9370a7d8614d1fa54649c75de14458e79b91ec.tar.bz2 linux-be9370a7d8614d1fa54649c75de14458e79b91ec.zip |
bpf: remove struct bpf_prog_type_list
There's no need to have struct bpf_prog_type_list since
it just contains a list_head, the type, and the ops
pointer. Since the types are densely packed and not
actually dynamically registered, it's much easier and
smaller to have an array of type->ops pointer. Also
initialize this array statically to remove code needed
to initialize it.
In order to save duplicating the list, move it to a new
header file and include it in the places needing it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/bpf/syscall.c')
-rw-r--r-- | kernel/bpf/syscall.c | 27 |
1 files changed, 11 insertions, 16 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index ab0cf4c43690..ea55691cbf5e 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -573,26 +573,21 @@ err_put: return err; } -static LIST_HEAD(bpf_prog_types); +static const struct bpf_verifier_ops * const bpf_prog_types[] = { +#define BPF_PROG_TYPE(_id, _ops) \ + [_id] = &_ops, +#include <linux/bpf_types.h> +#undef BPF_PROG_TYPE +}; static int find_prog_type(enum bpf_prog_type type, struct bpf_prog *prog) { - struct bpf_prog_type_list *tl; - - list_for_each_entry(tl, &bpf_prog_types, list_node) { - if (tl->type == type) { - prog->aux->ops = tl->ops; - prog->type = type; - return 0; - } - } - - return -EINVAL; -} + if (type >= ARRAY_SIZE(bpf_prog_types) || !bpf_prog_types[type]) + return -EINVAL; -void bpf_register_prog_type(struct bpf_prog_type_list *tl) -{ - list_add(&tl->list_node, &bpf_prog_types); + prog->aux->ops = bpf_prog_types[type]; + prog->type = type; + return 0; } /* drop refcnt on maps used by eBPF program and free auxilary data */ |