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71be6b4942
Add a new fallocate mode flag that explicitly unshares blocks on filesystems that support such features. The new flag can only be used with an allocate-mode fallocate call. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
32 lines
753 B
C
32 lines
753 B
C
#ifndef _FALLOC_H_
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#define _FALLOC_H_
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#include <uapi/linux/falloc.h>
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/*
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* Space reservation ioctls and argument structure
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* are designed to be compatible with the legacy XFS ioctls.
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*/
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struct space_resv {
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__s16 l_type;
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__s16 l_whence;
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__s64 l_start;
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__s64 l_len; /* len == 0 means until end of file */
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__s32 l_sysid;
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__u32 l_pid;
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__s32 l_pad[4]; /* reserved area */
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};
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#define FS_IOC_RESVSP _IOW('X', 40, struct space_resv)
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#define FS_IOC_RESVSP64 _IOW('X', 42, struct space_resv)
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#define FALLOC_FL_SUPPORTED_MASK (FALLOC_FL_KEEP_SIZE | \
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FALLOC_FL_PUNCH_HOLE | \
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FALLOC_FL_COLLAPSE_RANGE | \
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FALLOC_FL_ZERO_RANGE | \
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FALLOC_FL_INSERT_RANGE | \
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FALLOC_FL_UNSHARE_RANGE)
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#endif /* _FALLOC_H_ */
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