[PATCH 3/6] vfs: support FS_XFLAG_REFLINK and FS_XFLAG_COWEXTSIZE
From: Darrick J. Wong <hidden>
Date: 2016-08-25 23:31:08
Also in:
linux-fsdevel, linux-xfs
Subsystem:
filesystems (vfs and infrastructure), the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
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 3b00f7c..fb371a5 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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