| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _LINUX_STATFS_H |
| #define _LINUX_STATFS_H |
| |
| #include <linux/types.h> |
| #include <asm/statfs.h> |
| #include <asm/byteorder.h> |
| |
| struct kstatfs { |
| long f_type; |
| long f_bsize; |
| u64 f_blocks; |
| u64 f_bfree; |
| u64 f_bavail; |
| u64 f_files; |
| u64 f_ffree; |
| __kernel_fsid_t f_fsid; |
| long f_namelen; |
| long f_frsize; |
| long f_flags; |
| long f_spare[4]; |
| }; |
| |
| /* |
| * Definitions for the flag in f_flag. |
| * |
| * Generally these flags are equivalent to the MS_ flags used in the mount |
| * ABI. The exception is ST_VALID which has the same value as MS_REMOUNT |
| * which doesn't make any sense for statfs. |
| */ |
| #define ST_RDONLY 0x0001 /* mount read-only */ |
| #define ST_NOSUID 0x0002 /* ignore suid and sgid bits */ |
| #define ST_NODEV 0x0004 /* disallow access to device special files */ |
| #define ST_NOEXEC 0x0008 /* disallow program execution */ |
| #define ST_SYNCHRONOUS 0x0010 /* writes are synced at once */ |
| #define ST_VALID 0x0020 /* f_flags support is implemented */ |
| #define ST_MANDLOCK 0x0040 /* allow mandatory locks on an FS */ |
| /* 0x0080 used for ST_WRITE in glibc */ |
| /* 0x0100 used for ST_APPEND in glibc */ |
| /* 0x0200 used for ST_IMMUTABLE in glibc */ |
| #define ST_NOATIME 0x0400 /* do not update access times */ |
| #define ST_NODIRATIME 0x0800 /* do not update directory access times */ |
| #define ST_RELATIME 0x1000 /* update atime relative to mtime/ctime */ |
| #define ST_NOSYMFOLLOW 0x2000 /* do not follow symlinks */ |
| |
| struct dentry; |
| extern int vfs_get_fsid(struct dentry *dentry, __kernel_fsid_t *fsid); |
| |
| static inline __kernel_fsid_t u64_to_fsid(u64 v) |
| { |
| return (__kernel_fsid_t){.val = {(u32)v, (u32)(v>>32)}}; |
| } |
| |
| /* Fold 16 bytes uuid to 64 bit fsid */ |
| static inline __kernel_fsid_t uuid_to_fsid(__u8 *uuid) |
| { |
| return u64_to_fsid(le64_to_cpup((void *)uuid) ^ |
| le64_to_cpup((void *)(uuid + sizeof(u64)))); |
| } |
| |
| #endif |