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authorMenglong Dong <imagedong@tencent.com>2022-04-25 21:32:47 +0800
committerAlexei Starovoitov <ast@kernel.org>2022-04-26 11:35:21 -0700
commitc317ab71facc2cd0a94145973318a4c914e11acc (patch)
tree62a429e18068504f46d091d8423e9c4f39d633e7 /net/xdp
parent367590b7fccc2c317026abe7d29923322d959781 (diff)
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 'net/xdp')
-rw-r--r--net/xdp/xskmap.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/net/xdp/xskmap.c b/net/xdp/xskmap.c
index 65b53fb3de13..acc8e52a4f5f 100644
--- a/net/xdp/xskmap.c
+++ b/net/xdp/xskmap.c
@@ -9,6 +9,7 @@
#include <net/xdp_sock.h>
#include <linux/slab.h>
#include <linux/sched.h>
+#include <linux/btf_ids.h>
#include "xsk.h"
@@ -254,7 +255,7 @@ static bool xsk_map_meta_equal(const struct bpf_map *meta0,
bpf_map_meta_equal(meta0, meta1);
}
-static int xsk_map_btf_id;
+BTF_ID_LIST_SINGLE(xsk_map_btf_ids, struct, xsk_map)
const struct bpf_map_ops xsk_map_ops = {
.map_meta_equal = xsk_map_meta_equal,
.map_alloc = xsk_map_alloc,
@@ -266,7 +267,6 @@ const struct bpf_map_ops xsk_map_ops = {
.map_update_elem = xsk_map_update_elem,
.map_delete_elem = xsk_map_delete_elem,
.map_check_btf = map_check_no_btf,
- .map_btf_name = "xsk_map",
- .map_btf_id = &xsk_map_btf_id,
+ .map_btf_id = &xsk_map_btf_ids[0],
.map_redirect = xsk_map_redirect,
};