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-rw-r--r--kernel/bpf/task_iter.c32
1 files changed, 25 insertions, 7 deletions
diff --git a/kernel/bpf/task_iter.c b/kernel/bpf/task_iter.c
index 4dbf2b6035f8..232df29793e9 100644
--- a/kernel/bpf/task_iter.c
+++ b/kernel/bpf/task_iter.c
@@ -7,6 +7,7 @@
#include <linux/fs.h>
#include <linux/fdtable.h>
#include <linux/filter.h>
+#include <linux/btf_ids.h>
struct bpf_iter_seq_task_common {
struct pid_namespace *ns;
@@ -50,7 +51,8 @@ static void *task_seq_start(struct seq_file *seq, loff_t *pos)
if (!task)
return NULL;
- ++*pos;
+ if (*pos == 0)
+ ++*pos;
return task;
}
@@ -209,7 +211,8 @@ static void *task_file_seq_start(struct seq_file *seq, loff_t *pos)
return NULL;
}
- ++*pos;
+ if (*pos == 0)
+ ++*pos;
info->task = task;
info->files = files;
@@ -290,7 +293,7 @@ static void task_file_seq_stop(struct seq_file *seq, void *v)
}
}
-static int init_seq_pidns(void *priv_data)
+static int init_seq_pidns(void *priv_data, struct bpf_iter_aux_info *aux)
{
struct bpf_iter_seq_task_common *common = priv_data;
@@ -312,25 +315,36 @@ static const struct seq_operations task_file_seq_ops = {
.show = task_file_seq_show,
};
-static const struct bpf_iter_reg task_reg_info = {
- .target = "task",
+BTF_ID_LIST(btf_task_file_ids)
+BTF_ID(struct, task_struct)
+BTF_ID(struct, file)
+
+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 const 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),
@@ -338,16 +352,20 @@ static const 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)
{
int ret;
+ task_reg_info.ctx_arg_info[0].btf_id = btf_task_file_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];
return bpf_iter_reg_target(&task_file_reg_info);
}
late_initcall(task_iter_init);