The encryption xlator is the last one before posix and it's here that the data is getting encrypted. When the data is read back the encrypted data is returned. Decryption is supposed to happen in read callback which does not seem to be happening. The fact that encrypted data is getting returned indicates that data in turn is getting returned from the posix/underlying fs layer. Is it possible that data be returned by reading from the underlying fs by any translator other than posix.
Thanks and Regards, Ram From: Ravishankar N [mailto:[email protected]] Sent: Sunday, October 16, 2016 12:19 AM To: Ankireddypalle Reddy; [email protected] Subject: Re: [Gluster-users] rot-13 Translator query On 10/15/2016 08:22 PM, Ankireddypalle Reddy wrote: Hi, I am trying to follow the below document for developing a translator. https://github.com/gluster/glusterfs/blob/master/doc/developer-guide/translator-development.md I've created a replica volume and modified the vol file to include rot-13 translator. Below is the snippet from vol file. volume myvol-posix type storage/posix option volume-id b492191e-77a5-4fc3-9394-49218e36dae2 option directory /brick1/repli end-volume volume myvol-rot13 type encryption/rot-13 subvolumes myvol-posix end-volume volume myvol-trash type features/trash option trash-internal-op off option brick-path /brick1/repli option trash-dir .trashcan subvolumes myvol-rot13 end-volume ... The writes are getting intercepted by the translator and the file is getting encrypted. But the reads don't seem to be getting intercepted by the translator. I tried setting break point in the posix_readv function and attach the brick daemons to gdb. But posix_readv does not seem to be getting called on the brick daemon and the read completes on the application side. Can someone please explain how the reads are getting serviced here without hitting the posix layer. It could be due to client side caching. I usually disable all performance xlators (write-behind, read-head, io-cache, stat-prefetch, quick-read, open-behind) when I want to remove caching effects while debugging. drop-caches also helps. HTH, Ravi Thanks and Regards, Ram ***************************Legal Disclaimer*************************** "This communication may contain confidential and privileged material for the sole use of the intended recipient. Any unauthorized review, use or distribution by others is strictly prohibited. If you have received the message by mistake, please advise the sender by reply email and delete the message. Thank you." ********************************************************************** _______________________________________________ Gluster-users mailing list [email protected]<mailto:[email protected]> http://www.gluster.org/mailman/listinfo/gluster-users ***************************Legal Disclaimer*************************** "This communication may contain confidential and privileged material for the sole use of the intended recipient. Any unauthorized review, use or distribution by others is strictly prohibited. If you have received the message by mistake, please advise the sender by reply email and delete the message. Thank you." **********************************************************************
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