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(p: (void *)uuid) ^ |
58 | le64_to_cpup(p: (void *)(uuid + sizeof(u64)))); |
59 | } |
60 | |
61 | #endif |
62 | |