include/linux/falloc.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _FALLOC_H_
   3 #define _FALLOC_H_
   4
   5 #include <uapi/linux/falloc.h>
   6
   7
   8 /*
   9  * Space reservation ioctls and argument structure
  10  * are designed to be compatible with the legacy XFS ioctls.
  11  */
  12 struct space_resv {
  13         __s16           l_type;
  14         __s16           l_whence;
  15         __s64           l_start;
  16         __s64           l_len;          /* len == 0 means until end of file */
  17         __s32           l_sysid;
  18         __u32           l_pid;
  19         __s32           l_pad[4];       /* reserved area */
  20 };
  21
  22 #define FS_IOC_RESVSP           _IOW('X', 40, struct space_resv)
  23 #define FS_IOC_UNRESVSP         _IOW('X', 41, struct space_resv)
  24 #define FS_IOC_RESVSP64         _IOW('X', 42, struct space_resv)
  25 #define FS_IOC_UNRESVSP64       _IOW('X', 43, struct space_resv)
  26 #define FS_IOC_ZERO_RANGE       _IOW('X', 57, struct space_resv)
  27
  28 /*
  29  * Mask of all supported fallocate modes.  Only one can be set at a time.
  30  *
  31  * In addition to the mode bit, the mode argument can also encode flags.
  32  * FALLOC_FL_KEEP_SIZE is the only supported flag so far.
  33  */
  34 #define FALLOC_FL_MODE_MASK     (FALLOC_FL_ALLOCATE_RANGE |     \
  35                                  FALLOC_FL_PUNCH_HOLE |         \
  36                                  FALLOC_FL_COLLAPSE_RANGE |     \
  37                                  FALLOC_FL_ZERO_RANGE |         \
  38                                  FALLOC_FL_INSERT_RANGE |       \
  39                                  FALLOC_FL_UNSHARE_RANGE)
  40
  41 /* on ia32 l_start is on a 32-bit boundary */
  42 #if defined(CONFIG_X86_64)
  43 struct space_resv_32 {
  44         __s16           l_type;
  45         __s16           l_whence;
  46         __s64           l_start __attribute__((packed));
  47                         /* len == 0 means until end of file */
  48         __s64           l_len __attribute__((packed));
  49         __s32           l_sysid;
  50         __u32           l_pid;
  51         __s32           l_pad[4];       /* reserve area */
  52 };
  53
  54 #define FS_IOC_RESVSP_32        _IOW ('X', 40, struct space_resv_32)
  55 #define FS_IOC_UNRESVSP_32      _IOW ('X', 41, struct space_resv_32)
  56 #define FS_IOC_RESVSP64_32      _IOW ('X', 42, struct space_resv_32)
  57 #define FS_IOC_UNRESVSP64_32    _IOW ('X', 43, struct space_resv_32)
  58 #define FS_IOC_ZERO_RANGE_32    _IOW ('X', 57, struct space_resv_32)
  59
  60 #endif
  61
  62 #endif /* _FALLOC_H_ */