This moves the bpf_sock_from_file definition into net/core/filter.c
which only gets compiled with CONFIG_NET and also moves the helper proto
usage next to other tracing helpers that are conditional on CONFIG_NET.
This avoids
ld: kernel/trace/bpf_trace.o: in function `bpf_sock_from_file':
bpf_trace.c:(.text+0xe23): undefined reference to `sock_from_file'
When compiling a kernel with BPF and without NET.
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Acked-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Signed-off-by: Florent Revest <revest@xxxxxxxxxxxx>
---
include/linux/bpf.h | 1 +
kernel/trace/bpf_trace.c | 22 ++--------------------
net/core/filter.c | 18 ++++++++++++++++++
3 files changed, 21 insertions(+), 20 deletions(-)
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index d05e75ed8c1b..07cb5d15e743 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -1859,6 +1859,7 @@ extern const struct bpf_func_proto bpf_snprintf_btf_proto;
extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;
extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;
extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto;
+extern const struct bpf_func_proto bpf_sock_from_file_proto;
const struct bpf_func_proto *bpf_tracing_func_proto(
enum bpf_func_id func_id, const struct bpf_prog *prog);
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 0cf0a6331482..52ddd217d6a1 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -1270,24 +1270,6 @@ const struct bpf_func_proto bpf_snprintf_btf_proto = {
.arg5_type = ARG_ANYTHING,
};
-BPF_CALL_1(bpf_sock_from_file, struct file *, file)
-{
- return (unsigned long) sock_from_file(file);
-}
-
-BTF_ID_LIST(bpf_sock_from_file_btf_ids)
-BTF_ID(struct, socket)
-BTF_ID(struct, file)
-
-static const struct bpf_func_proto bpf_sock_from_file_proto = {
- .func = bpf_sock_from_file,
- .gpl_only = false,
- .ret_type = RET_PTR_TO_BTF_ID_OR_NULL,
- .ret_btf_id = &bpf_sock_from_file_btf_ids[0],
- .arg1_type = ARG_PTR_TO_BTF_ID,
- .arg1_btf_id = &bpf_sock_from_file_btf_ids[1],
-};
-
const struct bpf_func_proto *
bpf_tracing_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
{
@@ -1384,8 +1366,6 @@ bpf_tracing_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
return &bpf_per_cpu_ptr_proto;
case BPF_FUNC_bpf_this_cpu_ptr:
return &bpf_this_cpu_ptr_proto;
- case BPF_FUNC_sock_from_file:
- return &bpf_sock_from_file_proto;
default:
return NULL;
}
@@ -1778,6 +1758,8 @@ tracing_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
return &bpf_sk_storage_get_tracing_proto;
case BPF_FUNC_sk_storage_delete:
return &bpf_sk_storage_delete_tracing_proto;
+ case BPF_FUNC_sock_from_file:
+ return &bpf_sock_from_file_proto;
#endif
case BPF_FUNC_seq_printf:
return prog->expected_attach_type == BPF_TRACE_ITER ?
diff --git a/net/core/filter.c b/net/core/filter.c
index 77001a35768f..255aeee72402 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -10413,6 +10413,24 @@ const struct bpf_func_proto bpf_skc_to_udp6_sock_proto = {
.ret_btf_id = &btf_sock_ids[BTF_SOCK_TYPE_UDP6],
};
+BPF_CALL_1(bpf_sock_from_file, struct file *, file)
+{
+ return (unsigned long)sock_from_file(file);
+}
+
+BTF_ID_LIST(bpf_sock_from_file_btf_ids)
+BTF_ID(struct, socket)
+BTF_ID(struct, file)
+
+const struct bpf_func_proto bpf_sock_from_file_proto = {
+ .func = bpf_sock_from_file,
+ .gpl_only = false,
+ .ret_type = RET_PTR_TO_BTF_ID_OR_NULL,
+ .ret_btf_id = &bpf_sock_from_file_btf_ids[0],
+ .arg1_type = ARG_PTR_TO_BTF_ID,
+ .arg1_btf_id = &bpf_sock_from_file_btf_ids[1],
+};
+
static const struct bpf_func_proto *
bpf_sk_base_func_proto(enum bpf_func_id func_id)
{
--
2.29.2.576.ga3fc446d84-goog
