On Fri, Apr 05, 2013 at 07:35:00AM -0400, Brian Foster wrote: > On 04/05/2013 03:00 AM, Dave Chinner wrote: > > xfs: add metadata CRC documentation > > > > From: Dave Chinner <dchinner@xxxxxxxxxx> > > > > Add some documentation about the self describing metadata and the > > code templates used to implement it. > > + > > +Runtime Validation > > +------------------ > > + > ... > > + > > +The first step in read verification is checking the magic number and determining > > +whether CRC validating is necessary. If it is, the CRC32c is caluclated and > > What do you mean by "determining whether CRC validating is necessary?" > In other words, it's not always enabled but rather triggered by > something else that elevates suspicion on the object? It is triggered by either the magic number indicating the object has CRC checking or (xfs_sb_version_hascrc(sb) == true) indicating the filesystem has metadata CRC checking enabled. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
