Update c/mtime correctly on truncates
XFS changes the c/mtime of an inode when truncating it to the same
size. The c/mtime is only supposed to change if the size is changed.
Not to be confused with ftruncate, where the c/mtime is supposed to
be changed even if the size is not changed.
The Linux VFS encodes this semantic difference in the flags it sends
down to ->setattr, which XFS currently ignores. We need to make XFS
pay attention to the VFS flags and hence Do The Right Thing.
Date: Fri Feb 22 15:42:58 AEDT 2008
Inspected by: hch@xxxxxxxxxxxxx
The following file(s) were checked into:
fs/xfs/xfs_vnodeops.c - 1.739 - changed
- Only change the c/mtime on truncate when the file size does
not change if asked to by the VFS.