diff options
| author | Yonghong Song <yhs@fb.com> | 2020-07-20 18:34:03 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-07-21 22:26:26 +0200 |
| commit | 951cf368bcb11d6f817709660cf5cd914072c36f (patch) | |
| tree | 521419b293f6fd3b2e1d201bbb4ca49f9e9e5ce5 /net/netlink | |
| parent | bpf: Make btf_sock_ids global (diff) | |
| download | linux-951cf368bcb11d6f817709660cf5cd914072c36f.tar.xz linux-951cf368bcb11d6f817709660cf5cd914072c36f.zip | |
bpf: net: Use precomputed btf_id for bpf iterators
One additional field btf_id is added to struct
bpf_ctx_arg_aux to store the precomputed btf_ids.
The btf_id is computed at build time with
BTF_ID_LIST or BTF_ID_LIST_GLOBAL macro definitions.
All existing bpf iterators are changed to used
pre-compute btf_ids.
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200720163403.1393551-1-yhs@fb.com
Diffstat (limited to 'net/netlink')
| -rw-r--r-- | net/netlink/af_netlink.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index 4f2c3b14ddbf..3cd58f0c2de4 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -60,6 +60,7 @@ #include <linux/genetlink.h> #include <linux/net_namespace.h> #include <linux/nospec.h> +#include <linux/btf_ids.h> #include <net/net_namespace.h> #include <net/netns/generic.h> @@ -2803,7 +2804,10 @@ static const struct rhashtable_params netlink_rhashtable_params = { }; #if defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_PROC_FS) -static const struct bpf_iter_reg netlink_reg_info = { +BTF_ID_LIST(btf_netlink_sock_id) +BTF_ID(struct, netlink_sock) + +static struct bpf_iter_reg netlink_reg_info = { .target = "netlink", .seq_ops = &netlink_seq_ops, .init_seq_private = bpf_iter_init_seq_net, @@ -2818,6 +2822,7 @@ static const struct bpf_iter_reg netlink_reg_info = { static int __init bpf_iter_register(void) { + netlink_reg_info.ctx_arg_info[0].btf_id = *btf_netlink_sock_id; return bpf_iter_reg_target(&netlink_reg_info); } #endif |