include/linux/falloc.h

root/include/linux/falloc.h
/* 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_ */
Linux
