Line data    Source code

       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     7856406 :         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           0 :         return u64_to_fsid(le64_to_cpup((void *)uuid) ^
      58             :                 le64_to_cpup((void *)(uuid + sizeof(u64))));
      59             : }
      60             : 
      61             : #endif