On May 01, 2007 11:28 -0400, Theodore Tso wrote: > On Tue, May 01, 2007 at 12:01:42AM -0600, Andreas Dilger wrote: > > Except one other issue with online shrinking is that we need to move > > inodes on occasion and this poses a bunch of other problems over just > > remapping the data blocks. > > Well, I did say "necessary", and not "sufficient". But yes, moving > inodes, especially if the inode is currently open gets interesting. I > don't think there are that many user space applications that would > notice or care if the st_ino of an open file changed out from under > them, but there are obviously userspace applications, such as tar, > that would most definitely care. I think "rm -r" does a LOT of this kind of operation, like: stat(.); stat(foo); chdir(foo); stat(.); unlink(*); chdir(..); stat(.) I think "find" does the same to avoid security problems with malicious path manipulation. Cheers, Andreas -- Andreas Dilger Principal Software Engineer Cluster File Systems, Inc. - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
