linux-stable/include/linux/falloc.h
Namjae Jeon dd46c78778 fs: Add support FALLOC_FL_INSERT_RANGE for fallocate
FALLOC_FL_INSERT_RANGE command is the opposite command of
FALLOC_FL_COLLAPSE_RANGE that is needed for someone who wants to add
some data in the middle of file.

FALLOC_FL_INSERT_RANGE will create space for writing new data within
a file after shifting extents to right as given length. This command
also has same limitations as FALLOC_FL_COLLAPSE_RANGE in that
operations need to be filesystem block boundary aligned and cannot
cross the current EOF.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
2015-03-25 15:07:05 +11:00

30 lines
719 B
C

#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_RESVSP64 _IOW('X', 42, struct space_resv)
#define FALLOC_FL_SUPPORTED_MASK (FALLOC_FL_KEEP_SIZE | \
FALLOC_FL_PUNCH_HOLE | \
FALLOC_FL_COLLAPSE_RANGE | \
FALLOC_FL_ZERO_RANGE | \
FALLOC_FL_INSERT_RANGE)
#endif /* _FALLOC_H_ */