diff options
Diffstat (limited to 'include/linux/statfs.h')
| -rw-r--r-- | include/linux/statfs.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/statfs.h b/include/linux/statfs.h index 0166d320a75d..02c862686ea3 100644 --- a/include/linux/statfs.h +++ b/include/linux/statfs.h @@ -1,8 +1,10 @@ +/* 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; @@ -39,5 +41,21 @@ struct kstatfs { #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 |