[PATCH] vfs: support FS_XFLAG_REFLINK and FS_XFLAG_COWEXTSIZE
From: Darrick J. Wong <hidden>
Date: 2016-03-02 23:56:44
Introduce XFLAGs for the new XFS reflink inode flag and the CoW extent size hint, and actually plumb the CoW extent size hint into the fsxattr structure. Signed-off-by: Darrick J. Wong <redacted> --- include/uapi/linux/fs.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
index 41e0433..c5975ef 100644
--- a/include/uapi/linux/fs.h
+++ b/include/uapi/linux/fs.h@@ -157,7 +157,8 @@ struct fsxattr { __u32 fsx_extsize; /* extsize field value (get/set)*/ __u32 fsx_nextents; /* nextents field value (get) */ __u32 fsx_projid; /* project identifier (get/set) */ - unsigned char fsx_pad[12]; + __u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/ + unsigned char fsx_pad[8]; }; /*
@@ -178,6 +179,8 @@ struct fsxattr { #define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */ #define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */ #define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */ +#define FS_XFLAG_REFLINK 0x00010000 /* file is reflinked */ +#define FS_XFLAG_COWEXTSIZE 0x00020000 /* CoW extent size allocator hint */ #define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */ /* the read-only stuff doesn't really belong here, but any other place is
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