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 9 struct 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 46 struct dentry; 47 extern int vfs_get_fsid(struct dentry *dentry, __kernel_fsid_t *fsid); 48 u64_to_fsid(u64 v)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 */ uuid_to_fsid(__u8 * uuid)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