There are all kinds of problems with this. It's not OK to grow the amount of space used -- that'll break quotas, reservations, etc.
We should really get together for a comprehensive design review. When's the next time you're going to be in town? Jeff On Fri, Sep 14, 2007 at 06:01:05PM +0100, Darren J Moffat wrote: > For the CCM mode of AES the ciphertext is slightly larger than the > plaintext. This is because of the built in Message Authentication Code > (MAC). > > At what point in the write pipeline do I need take this into account ? > Encryption happens after Compression but in the case there there is no > Compression (either because it is off or the compress state didn't > result in smaller datasize) the PSIZE will be larger than the LSIZE (the > opposite of compression). > > I know the additional amount of space I need at the start of the > zio_write_encrypt() stage (it is actually a hardcoded amount rather than > a function of the input size). > > Do I need to somehow reallocate the block ? > > -- > Darren J Moffat > _______________________________________________ > zfs-code mailing list > zfs-code at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-code
