7982a89851
Move it from tools/perf/util/cgroup.c as it can be used by other places. Note that cgroup filesystem is different from others since it's usually mounted separately (in v1) for each subsystem. I just copied the code with a little modification to pass a name of subsystem. Suggested-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200127100031.1368732-1-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __API_FS__
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#define __API_FS__
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#include <stdbool.h>
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#include <unistd.h>
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/*
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* On most systems <limits.h> would have given us this, but not on some systems
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* (e.g. GNU/Hurd).
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*/
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#ifndef PATH_MAX
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#define PATH_MAX 4096
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#endif
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#define FS(name) \
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const char *name##__mountpoint(void); \
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const char *name##__mount(void); \
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bool name##__configured(void); \
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FS(sysfs)
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FS(procfs)
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FS(debugfs)
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FS(tracefs)
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FS(hugetlbfs)
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FS(bpf_fs)
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#undef FS
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int cgroupfs_find_mountpoint(char *buf, size_t maxlen, const char *subsys);
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int filename__read_int(const char *filename, int *value);
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int filename__read_ull(const char *filename, unsigned long long *value);
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int filename__read_xll(const char *filename, unsigned long long *value);
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int filename__read_str(const char *filename, char **buf, size_t *sizep);
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int filename__write_int(const char *filename, int value);
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int procfs__read_str(const char *entry, char **buf, size_t *sizep);
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int sysctl__read_int(const char *sysctl, int *value);
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int sysfs__read_int(const char *entry, int *value);
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int sysfs__read_ull(const char *entry, unsigned long long *value);
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int sysfs__read_xll(const char *entry, unsigned long long *value);
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int sysfs__read_str(const char *entry, char **buf, size_t *sizep);
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int sysfs__read_bool(const char *entry, bool *value);
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int sysfs__write_int(const char *entry, int value);
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#endif /* __API_FS__ */
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