/* 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