statfs.h 1.8 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef _LINUX_STATFS_H
  3. #define _LINUX_STATFS_H
  4. #include <linux/types.h>
  5. #include <asm/statfs.h>
  6. #include <asm/byteorder.h>
  7. struct kstatfs {
  8. long f_type;
  9. long f_bsize;
  10. u64 f_blocks;
  11. u64 f_bfree;
  12. u64 f_bavail;
  13. u64 f_files;
  14. u64 f_ffree;
  15. __kernel_fsid_t f_fsid;
  16. long f_namelen;
  17. long f_frsize;
  18. long f_flags;
  19. long f_spare[4];
  20. };
  21. /*
  22. * Definitions for the flag in f_flag.
  23. *
  24. * Generally these flags are equivalent to the MS_ flags used in the mount
  25. * ABI. The exception is ST_VALID which has the same value as MS_REMOUNT
  26. * which doesn't make any sense for statfs.
  27. */
  28. #define ST_RDONLY 0x0001 /* mount read-only */
  29. #define ST_NOSUID 0x0002 /* ignore suid and sgid bits */
  30. #define ST_NODEV 0x0004 /* disallow access to device special files */
  31. #define ST_NOEXEC 0x0008 /* disallow program execution */
  32. #define ST_SYNCHRONOUS 0x0010 /* writes are synced at once */
  33. #define ST_VALID 0x0020 /* f_flags support is implemented */
  34. #define ST_MANDLOCK 0x0040 /* allow mandatory locks on an FS */
  35. /* 0x0080 used for ST_WRITE in glibc */
  36. /* 0x0100 used for ST_APPEND in glibc */
  37. /* 0x0200 used for ST_IMMUTABLE in glibc */
  38. #define ST_NOATIME 0x0400 /* do not update access times */
  39. #define ST_NODIRATIME 0x0800 /* do not update directory access times */
  40. #define ST_RELATIME 0x1000 /* update atime relative to mtime/ctime */
  41. #define ST_NOSYMFOLLOW 0x2000 /* do not follow symlinks */
  42. struct dentry;
  43. extern int vfs_get_fsid(struct dentry *dentry, __kernel_fsid_t *fsid);
  44. static inline __kernel_fsid_t u64_to_fsid(u64 v)
  45. {
  46. return (__kernel_fsid_t){.val = {(u32)v, (u32)(v>>32)}};
  47. }
  48. /* Fold 16 bytes uuid to 64 bit fsid */
  49. static inline __kernel_fsid_t uuid_to_fsid(__u8 *uuid)
  50. {
  51. return u64_to_fsid(le64_to_cpup((void *)uuid) ^
  52. le64_to_cpup((void *)(uuid + sizeof(u64))));
  53. }
  54. #endif