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authorYonghong Song <yhs@fb.com>2020-07-23 21:41:09 +0300
committerAlexei Starovoitov <ast@kernel.org>2020-07-26 06:16:32 +0300
commit14fc6bd6b79c430f615500d0fe6cea4722110db8 (patch)
tree5fef4ccfed6460489ece68286530134f630ad4eb /kernel/bpf/task_iter.c
parenta228a64fc1e4428e2b96dc68e9ad3c447095c9e7 (diff)
downloadlinux-14fc6bd6b79c430f615500d0fe6cea4722110db8.tar.xz
bpf: Refactor bpf_iter_reg to have separate seq_info member
There is no functionality change for this patch. Struct bpf_iter_reg is used to register a bpf_iter target, which includes information for both prog_load, link_create and seq_file creation. This patch puts fields related seq_file creation into a different structure. This will be useful for map elements iterator where one iterator covers different map types and different map types may have different seq_ops, init/fini private_data function and private_data size. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200723184109.590030-1-yhs@fb.com
Diffstat (limited to 'kernel/bpf/task_iter.c')
-rw-r--r--kernel/bpf/task_iter.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/kernel/bpf/task_iter.c b/kernel/bpf/task_iter.c
index 1039e52ebd8b..6d9cd23869bf 100644
--- a/kernel/bpf/task_iter.c
+++ b/kernel/bpf/task_iter.c
@@ -319,25 +319,32 @@ BTF_ID_LIST(btf_task_file_ids)
BTF_ID(struct, task_struct)
BTF_ID(struct, file)
-static struct bpf_iter_reg task_reg_info = {
- .target = "task",
+static const struct bpf_iter_seq_info task_seq_info = {
.seq_ops = &task_seq_ops,
.init_seq_private = init_seq_pidns,
.fini_seq_private = fini_seq_pidns,
.seq_priv_size = sizeof(struct bpf_iter_seq_task_info),
+};
+
+static struct bpf_iter_reg task_reg_info = {
+ .target = "task",
.ctx_arg_info_size = 1,
.ctx_arg_info = {
{ offsetof(struct bpf_iter__task, task),
PTR_TO_BTF_ID_OR_NULL },
},
+ .seq_info = &task_seq_info,
};
-static struct bpf_iter_reg task_file_reg_info = {
- .target = "task_file",
+static const struct bpf_iter_seq_info task_file_seq_info = {
.seq_ops = &task_file_seq_ops,
.init_seq_private = init_seq_pidns,
.fini_seq_private = fini_seq_pidns,
.seq_priv_size = sizeof(struct bpf_iter_seq_task_file_info),
+};
+
+static struct bpf_iter_reg task_file_reg_info = {
+ .target = "task_file",
.ctx_arg_info_size = 2,
.ctx_arg_info = {
{ offsetof(struct bpf_iter__task_file, task),
@@ -345,6 +352,7 @@ static struct bpf_iter_reg task_file_reg_info = {
{ offsetof(struct bpf_iter__task_file, file),
PTR_TO_BTF_ID_OR_NULL },
},
+ .seq_info = &task_file_seq_info,
};
static int __init task_iter_init(void)