From: Daniel Xu <dxu@dxuuu.xyz>
Date: Mon, 23 Aug 2021 19:43:47 -0700
Subject: bpf: Consolidate task_struct BTF_ID declarations
Patch-mainline: v5.15-rc1
Git-commit: 33c5cb36015ac1034b50b823fae367e908d05147
References: jsc#PED-1377
No need to have it defined 5 times. Once is enough.
Signed-off-by: Daniel Xu <dxu@dxuuu.xyz>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/6dcefa5bed26fe1226f26683f36819bb53ec19a2.1629772842.git.dxu@dxuuu.xyz
Acked-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
---
include/linux/btf_ids.h | 2 ++
kernel/bpf/bpf_task_storage.c | 6 ++----
kernel/bpf/stackmap.c | 4 +---
kernel/bpf/task_iter.c | 11 +++++------
kernel/trace/bpf_trace.c | 4 ++--
5 files changed, 12 insertions(+), 15 deletions(-)
--- a/include/linux/btf_ids.h
+++ b/include/linux/btf_ids.h
@@ -188,4 +188,6 @@ MAX_BTF_SOCK_TYPE,
extern u32 btf_sock_ids[];
#endif
+extern u32 btf_task_struct_ids[];
+
#endif
--- a/kernel/bpf/bpf_task_storage.c
+++ b/kernel/bpf/bpf_task_storage.c
@@ -317,15 +317,13 @@ const struct bpf_map_ops task_storage_ma
.map_owner_storage_ptr = task_storage_ptr,
};
-BTF_ID_LIST_SINGLE(bpf_task_storage_btf_ids, struct, task_struct)
-
const struct bpf_func_proto bpf_task_storage_get_proto = {
.func = bpf_task_storage_get,
.gpl_only = false,
.ret_type = RET_PTR_TO_MAP_VALUE_OR_NULL,
.arg1_type = ARG_CONST_MAP_PTR,
.arg2_type = ARG_PTR_TO_BTF_ID,
- .arg2_btf_id = &bpf_task_storage_btf_ids[0],
+ .arg2_btf_id = &btf_task_struct_ids[0],
.arg3_type = ARG_PTR_TO_MAP_VALUE_OR_NULL,
.arg4_type = ARG_ANYTHING,
};
@@ -336,5 +334,5 @@ const struct bpf_func_proto bpf_task_sto
.ret_type = RET_INTEGER,
.arg1_type = ARG_CONST_MAP_PTR,
.arg2_type = ARG_PTR_TO_BTF_ID,
- .arg2_btf_id = &bpf_task_storage_btf_ids[0],
+ .arg2_btf_id = &btf_task_struct_ids[0],
};
--- a/kernel/bpf/stackmap.c
+++ b/kernel/bpf/stackmap.c
@@ -530,14 +530,12 @@ BPF_CALL_4(bpf_get_task_stack, struct ta
return res;
}
-BTF_ID_LIST_SINGLE(bpf_get_task_stack_btf_ids, struct, task_struct)
-
const struct bpf_func_proto bpf_get_task_stack_proto = {
.func = bpf_get_task_stack,
.gpl_only = false,
.ret_type = RET_INTEGER,
.arg1_type = ARG_PTR_TO_BTF_ID,
- .arg1_btf_id = &bpf_get_task_stack_btf_ids[0],
+ .arg1_btf_id = &btf_task_struct_ids[0],
.arg2_type = ARG_PTR_TO_UNINIT_MEM,
.arg3_type = ARG_CONST_SIZE_OR_ZERO,
.arg4_type = ARG_ANYTHING,
--- a/kernel/bpf/task_iter.c
+++ b/kernel/bpf/task_iter.c
@@ -525,7 +525,6 @@ static const struct seq_operations task_
};
BTF_ID_LIST(btf_task_file_ids)
-BTF_ID(struct, task_struct)
BTF_ID(struct, file)
BTF_ID(struct, vm_area_struct)
@@ -591,19 +590,19 @@ static int __init task_iter_init(void)
{
int ret;
- task_reg_info.ctx_arg_info[0].btf_id = btf_task_file_ids[0];
+ task_reg_info.ctx_arg_info[0].btf_id = btf_task_struct_ids[0];
ret = bpf_iter_reg_target(&task_reg_info);
if (ret)
return ret;
- task_file_reg_info.ctx_arg_info[0].btf_id = btf_task_file_ids[0];
- task_file_reg_info.ctx_arg_info[1].btf_id = btf_task_file_ids[1];
+ task_file_reg_info.ctx_arg_info[0].btf_id = btf_task_struct_ids[0];
+ task_file_reg_info.ctx_arg_info[1].btf_id = btf_task_file_ids[0];
ret = bpf_iter_reg_target(&task_file_reg_info);
if (ret)
return ret;
- task_vma_reg_info.ctx_arg_info[0].btf_id = btf_task_file_ids[0];
- task_vma_reg_info.ctx_arg_info[1].btf_id = btf_task_file_ids[2];
+ task_vma_reg_info.ctx_arg_info[0].btf_id = btf_task_struct_ids[0];
+ task_vma_reg_info.ctx_arg_info[1].btf_id = btf_task_file_ids[1];
return bpf_iter_reg_target(&task_vma_reg_info);
}
late_initcall(task_iter_init);
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -714,13 +714,13 @@ BPF_CALL_0(bpf_get_current_task_btf)
return (unsigned long) current;
}
-BTF_ID_LIST_SINGLE(bpf_get_current_btf_ids, struct, task_struct)
+BTF_ID_LIST_GLOBAL_SINGLE(btf_task_struct_ids, struct, task_struct)
static const struct bpf_func_proto bpf_get_current_task_btf_proto = {
.func = bpf_get_current_task_btf,
.gpl_only = true,
.ret_type = RET_PTR_TO_BTF_ID,
- .ret_btf_id = &bpf_get_current_btf_ids[0],
+ .ret_btf_id = &btf_task_struct_ids[0],
};
BPF_CALL_2(bpf_current_task_under_cgroup, struct bpf_map *, map, u32, idx)