Exports three necessary symbols for implementing struct_ops with
tristate subsystem.
To hold or release refcnt of struct_ops refcnt by inline funcs
bpf_try_module_get and bpf_module_put which use bpf_struct_ops_get(put)
conditionally.
And to copy obj name from one to the other with effective checks by
bpf_obj_name_cpy.
Signed-off-by: D. Wythe <alibuda@xxxxxxxxxxxxxxxxx>
---
kernel/bpf/bpf_struct_ops.c | 2 ++
kernel/bpf/syscall.c | 1 +
2 files changed, 3 insertions(+)
diff --git a/kernel/bpf/bpf_struct_ops.c b/kernel/bpf/bpf_struct_ops.c
index 687a3e9c76f5..1b35c5f0562c 100644
--- a/kernel/bpf/bpf_struct_ops.c
+++ b/kernel/bpf/bpf_struct_ops.c
@@ -1162,6 +1162,7 @@ bool bpf_struct_ops_get(const void *kdata)
map = __bpf_map_inc_not_zero(&st_map->map, false);
return !IS_ERR(map);
}
+EXPORT_SYMBOL_GPL(bpf_struct_ops_get);
void bpf_struct_ops_put(const void *kdata)
{
@@ -1173,6 +1174,7 @@ void bpf_struct_ops_put(const void *kdata)
bpf_map_put(&st_map->map);
}
+EXPORT_SYMBOL_GPL(bpf_struct_ops_put);
static bool bpf_struct_ops_valid_to_reg(struct bpf_map *map)
{
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index e63039817af3..60b4922e5e15 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -1201,6 +1201,7 @@ int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size)
return src - orig_src;
}
+EXPORT_SYMBOL_GPL(bpf_obj_name_cpy);
int map_check_no_btf(const struct bpf_map *map,
const struct btf *btf,
--
2.45.0
