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
49 static 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 */
55 static 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
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.