1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _LINUX_STATFS_H 3#define _LINUX_STATFS_H 4 5#include <linux/types.h> 6#include <asm/statfs.h> 7#include <asm/byteorder.h> 8 9struct kstatfs { 10 long f_type; 11 long f_bsize; 12 u64 f_blocks; 13 u64 f_bfree; 14 u64 f_bavail; 15 u64 f_files; 16 u64 f_ffree; 17 __kernel_fsid_t f_fsid; 18 long f_namelen; 19 long f_frsize; 20 long f_flags; 21 long f_spare[4]; 22}; 23 24/* 25 * Definitions for the flag in f_flag. 26 * 27 * Generally these flags are equivalent to the MS_ flags used in the mount 28 * ABI. The exception is ST_VALID which has the same value as MS_REMOUNT 29 * which doesn't make any sense for statfs. 30 */ 31#define ST_RDONLY 0x0001 /* mount read-only */ 32#define ST_NOSUID 0x0002 /* ignore suid and sgid bits */ 33#define ST_NODEV 0x0004 /* disallow access to device special files */ 34#define ST_NOEXEC 0x0008 /* disallow program execution */ 35#define ST_SYNCHRONOUS 0x0010 /* writes are synced at once */ 36#define ST_VALID 0x0020 /* f_flags support is implemented */ 37#define ST_MANDLOCK 0x0040 /* allow mandatory locks on an FS */ 38/* 0x0080 used for ST_WRITE in glibc */ 39/* 0x0100 used for ST_APPEND in glibc */ 40/* 0x0200 used for ST_IMMUTABLE in glibc */ 41#define ST_NOATIME 0x0400 /* do not update access times */ 42#define ST_NODIRATIME 0x0800 /* do not update directory access times */ 43#define ST_RELATIME 0x1000 /* update atime relative to mtime/ctime */ 44#define ST_NOSYMFOLLOW 0x2000 /* do not follow symlinks */ 45 46struct dentry; 47extern int vfs_get_fsid(struct dentry *dentry, __kernel_fsid_t *fsid); 48 49static inline __kernel_fsid_t u64_to_fsid(u64 v) 50{ 51 return (__kernel_fsid_t){.val = {(u32)v, (u32)(v>>32)}}; 52} 53 54/* Fold 16 bytes uuid to 64 bit fsid */ 55static inline __kernel_fsid_t uuid_to_fsid(__u8 *uuid) 56{ 57 return u64_to_fsid(le64_to_cpup((void *)uuid) ^ 58 le64_to_cpup((void *)(uuid + sizeof(u64)))); 59} 60 61#endif 62