Quelle falloc.h Sprache: C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _FALLOC_H_
#define _FALLOC_H_

#include <uapi/linux/falloc.h>

/*
* Space reservation ioctls and argument structure
* are designed to be compatible with the legacy XFS ioctls.
*/
struct space_resv {
__s16  l_type;
__s16  l_whence;
__s64  l_start;
__s64  l_len;  /* len == 0 means until end of file */
__s32  l_sysid;
__u32  l_pid;
__s32  l_pad[4]; /* reserved area */
};

#define FS_IOC_RESVSP  _IOW('X', 40, struct space_resv)
#define FS_IOC_UNRESVSP  _IOW('X', 41, struct space_resv)
#define FS_IOC_RESVSP64  _IOW('X', 42, struct space_resv)
#define FS_IOC_UNRESVSP64 _IOW('X', 43, struct space_resv)
#define FS_IOC_ZERO_RANGE _IOW('X', 57, struct space_resv)

/*
* Mask of all supported fallocate modes.  Only one can be set at a time.
*
* In addition to the mode bit, the mode argument can also encode flags.
* FALLOC_FL_KEEP_SIZE is the only supported flag so far.
*/
#define FALLOC_FL_MODE_MASK (FALLOC_FL_ALLOCATE_RANGE | \
     FALLOC_FL_PUNCH_HOLE |  \
     FALLOC_FL_COLLAPSE_RANGE | \
     FALLOC_FL_ZERO_RANGE |  \
     FALLOC_FL_INSERT_RANGE | \
     FALLOC_FL_UNSHARE_RANGE | \
     FALLOC_FL_WRITE_ZEROES)

/* on ia32 l_start is on a 32-bit boundary */
#if defined(CONFIG_X86_64)
struct space_resv_32 {
__s16  l_type;
__s16  l_whence;
__s64  l_start __attribute__((packed));
   /* len == 0 means until end of file */
__s64  l_len __attribute__((packed));
__s32  l_sysid;
__u32  l_pid;
__s32  l_pad[4]; /* reserve area */
};

#define FS_IOC_RESVSP_32 _IOW ('X', 40, struct space_resv_32)
#define FS_IOC_UNRESVSP_32 _IOW ('X', 41, struct space_resv_32)
#define FS_IOC_RESVSP64_32 _IOW ('X', 42, struct space_resv_32)
#define FS_IOC_UNRESVSP64_32 _IOW ('X', 43, struct space_resv_32)
#define FS_IOC_ZERO_RANGE_32 _IOW ('X', 57, struct space_resv_32)

#endif

#endif /* _FALLOC_H_ */

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