add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/tools/testing/selftests/cgroup/cgroup_util.h
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@@ -1,4 +1,5 @@
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 /* SPDX-License-Identifier: GPL-2.0 */
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+#include <stdbool.h>
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 #include <stdlib.h>
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 #define PAGE_SIZE 4096
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@@ -18,6 +19,7 @@
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 extern int cg_find_unified_root(char *root, size_t len);
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 extern char *cg_name(const char *root, const char *name);
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 extern char *cg_name_indexed(const char *root, const char *name, int index);
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+extern char *cg_control(const char *cgroup, const char *control);
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 extern int cg_create(const char *cgroup);
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 extern int cg_destroy(const char *cgroup);
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 extern int cg_read(const char *cgroup, const char *control,
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@@ -28,11 +30,14 @@
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 			  const char *needle);
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 extern long cg_read_long(const char *cgroup, const char *control);
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 long cg_read_key_long(const char *cgroup, const char *control, const char *key);
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+extern long cg_read_lc(const char *cgroup, const char *control);
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 extern int cg_write(const char *cgroup, const char *control, char *buf);
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 extern int cg_run(const char *cgroup,
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 		  int (*fn)(const char *cgroup, void *arg),
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 		  void *arg);
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+extern int cg_enter(const char *cgroup, int pid);
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 extern int cg_enter_current(const char *cgroup);
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+extern int cg_enter_current_thread(const char *cgroup);
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 extern int cg_run_nowait(const char *cgroup,
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 			 int (*fn)(const char *cgroup, void *arg),
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 			 void *arg);
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@@ -41,3 +46,11 @@
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 extern int alloc_anon(const char *cgroup, void *arg);
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 extern int is_swap_enabled(void);
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 extern int set_oom_adj_score(int pid, int score);
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+extern int cg_wait_for_proc_count(const char *cgroup, int count);
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+extern int cg_killall(const char *cgroup);
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+extern ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t size);
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+extern int proc_read_strstr(int pid, bool thread, const char *item, const char *needle);
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+extern pid_t clone_into_cgroup(int cgroup_fd);
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+extern int clone_reap(pid_t pid, int options);
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+extern int clone_into_cgroup_run_wait(const char *cgroup);
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+extern int dirfd_open_opath(const char *dir);