summaryrefslogtreecommitdiffstats
path: root/fs/ocfs2/xattr.c
diff options
context:
space:
mode:
authorTao Ma <tao.ma@oracle.com>2009-08-18 05:40:59 +0200
committerJoel Becker <joel.becker@oracle.com>2009-09-23 05:09:39 +0200
commita9063ab9a3827483007124bdb6f9877f0ab4c3f5 (patch)
tree78afcc391daf9d66df5bf34b207aa8e9c53ca7d6 /fs/ocfs2/xattr.c
parentocfs2: Add normal functions for reflink a normal file's extents. (diff)
downloadlinux-a9063ab9a3827483007124bdb6f9877f0ab4c3f5.tar.xz
linux-a9063ab9a3827483007124bdb6f9877f0ab4c3f5.zip
ocfs2: handle file attributes issue for reflink.
A reflink creates a snapshot of a file, that means the attributes must be identical except for three exceptions - nlink, ino, and ctime. As for time changes, Here is a brief description: 1. Source file: 1) atime: Ignore. Let the lazy atime code handle that. 2) mtime: don't touch. 3) ctime: If we change the tree (adding REFCOUNTED to at least one extent), update it. 2. Destination file: 1) atime: ignore. 2) mtime: we want it to appear identical to the source. 3) ctime: update. The idea here is that an ls -l will show the same time for the src and target - it shows mtime. Backup software like rsync and tar will treat the new file correctly too. Signed-off-by: Tao Ma <tao.ma@oracle.com>
Diffstat (limited to 'fs/ocfs2/xattr.c')
0 files changed, 0 insertions, 0 deletions