1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2cd0cfad7SBorislav Petkov #ifndef __API_FS__ 3cd0cfad7SBorislav Petkov #define __API_FS__ 4cd0cfad7SBorislav Petkov 5709adcb3SJiri Olsa #include <stdbool.h> 6607bfbd7SJiri Olsa #include <unistd.h> 7709adcb3SJiri Olsa 8b86b0d35SJiri Olsa /* 9b86b0d35SJiri Olsa * On most systems <limits.h> would have given us this, but not on some systems 10b86b0d35SJiri Olsa * (e.g. GNU/Hurd). 11b86b0d35SJiri Olsa */ 12b86b0d35SJiri Olsa #ifndef PATH_MAX 13b86b0d35SJiri Olsa #define PATH_MAX 4096 14b86b0d35SJiri Olsa #endif 15b86b0d35SJiri Olsa 1673ca85adSJiri Olsa #define FS(name) \ 1773ca85adSJiri Olsa const char *name##__mountpoint(void); \ 18709adcb3SJiri Olsa const char *name##__mount(void); \ 19709adcb3SJiri Olsa bool name##__configured(void); \ 2073ca85adSJiri Olsa 21*c6fddb28SStephane Eranian /* 22*c6fddb28SStephane Eranian * The xxxx__mountpoint() entry points find the first match mount point for each 23*c6fddb28SStephane Eranian * filesystems listed below, where xxxx is the filesystem type. 24*c6fddb28SStephane Eranian * 25*c6fddb28SStephane Eranian * The interface is as follows: 26*c6fddb28SStephane Eranian * 27*c6fddb28SStephane Eranian * - If a mount point is found on first call, it is cached and used for all 28*c6fddb28SStephane Eranian * subsequent calls. 29*c6fddb28SStephane Eranian * 30*c6fddb28SStephane Eranian * - If a mount point is not found, NULL is returned on first call and all 31*c6fddb28SStephane Eranian * subsequent calls. 32*c6fddb28SStephane Eranian */ 3373ca85adSJiri Olsa FS(sysfs) 3473ca85adSJiri Olsa FS(procfs) 3573ca85adSJiri Olsa FS(debugfs) 3673ca85adSJiri Olsa FS(tracefs) 375e7be3e1SWang Nan FS(hugetlbfs) 3871dc4c30SJoe Stringer FS(bpf_fs) 3973ca85adSJiri Olsa 4073ca85adSJiri Olsa #undef FS 4173ca85adSJiri Olsa 423a351127SArnaldo Carvalho de Melo 437982a898SNamhyung Kim int cgroupfs_find_mountpoint(char *buf, size_t maxlen, const char *subsys); 447982a898SNamhyung Kim 453a351127SArnaldo Carvalho de Melo int filename__read_int(const char *filename, int *value); 462d729f6aSArnaldo Carvalho de Melo int filename__read_ull(const char *filename, unsigned long long *value); 476baddfc6SJiri Olsa int filename__read_xll(const char *filename, unsigned long long *value); 48607bfbd7SJiri Olsa int filename__read_str(const char *filename, char **buf, size_t *sizep); 492d729f6aSArnaldo Carvalho de Melo 503b00ea93SKan Liang int filename__write_int(const char *filename, int value); 513b00ea93SKan Liang 524bd112dfSArnaldo Carvalho de Melo int procfs__read_str(const char *entry, char **buf, size_t *sizep); 534bd112dfSArnaldo Carvalho de Melo 5442e3c4a1SArnaldo Carvalho de Melo int sysctl__read_int(const char *sysctl, int *value); 552d729f6aSArnaldo Carvalho de Melo int sysfs__read_int(const char *entry, int *value); 562d729f6aSArnaldo Carvalho de Melo int sysfs__read_ull(const char *entry, unsigned long long *value); 57d9c5f322SJiri Olsa int sysfs__read_xll(const char *entry, unsigned long long *value); 5851c0396cSJiri Olsa int sysfs__read_str(const char *entry, char **buf, size_t *sizep); 59b9835a90SAlexander Shishkin int sysfs__read_bool(const char *entry, bool *value); 603b00ea93SKan Liang 613b00ea93SKan Liang int sysfs__write_int(const char *entry, int value); 62cd0cfad7SBorislav Petkov #endif /* __API_FS__ */ 63