diff options
Diffstat (limited to 'include/linux/statfs.h')
| -rw-r--r-- | include/linux/statfs.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/include/linux/statfs.h b/include/linux/statfs.h new file mode 100644 index 000000000..02c862686 --- /dev/null +++ b/include/linux/statfs.h @@ -0,0 +1,61 @@ +/* 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 |