On Tue, Oct 02, 2007 at 03:38:47PM -0400, Thomas Watt wrote: > In case you are interested, here is link to a web page on Structure Marking: > http://www.multicians.org/thvv/marking.html I actually have used a Multics system way back when (I was actually logged into MIT Multics when it was finally shutdown[1]). The com_err library and the ss library in e2fsprogs was largely inspired from Multics, and I do use structure magic numbers in memory to protect against programming errors, which is basically a very simple structure marking technique. I'm a bit dubious about how useful simply structure matching would be for modern Linux systems, since a large number of errors really are silent bit flips in the data, that wouldn't be detected simply by checking the expected structure ID at the beginning of the on-disk object. We are planning on adding checksum to metadata for ext4, which will help a lot in terms of detected bad metadata. Regards, ("You are protected from preemption" :-) [1] http://stuff.mit.edu/afs/sipb/project/eichin/sipbscan/ - Ted _______________________________________________ Ext3-users mailing list Ext3-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ext3-users
