Encrypted ZFS restore Problem

[dotmanila]

System information

Type	Version/Name
Distribution Name	Ubuntu 16.04
Distribution Version	AWS r4.xlarge instance with 2 EBS volumes 20GB each
Linux Kernel	Linux ip-10-1-2-117 4.4.0-1039-aws
Architecture	x86_64
ZFS Version	v0.7.0-157_gc9427c4, ZFS pool version 5000, ZFS filesystem version 5
SPL Version	version: 0.7.0-20_g35a44fc

Describe the problem you're observing

When restoring an encrypted volume/pool I can either get a crash (AWS instance crashes and restarts)

Nov  1 16:27:14 ip-10-1-2-117 kernel: [ 9752.942899]  xvdb: xvdb1 xvdb9
Nov  1 16:27:14 ip-10-1-2-117 kernel: [ 9752.948188]  xvdb: xvdb1 xvdb9
Nov  1 16:32:39 ip-10-1-2-117 kernel: [    0.000000] Initializing cgroup subsys cpuset```

Or an error about key echange:

ubuntu@ip-10-1-2-87:/backups$ sudo cp zfskey /dev/shm/
ubuntu@ip-10-1-2-87:/backups$ sudo zfs load-key mysql-data
cannot open 'mysql-data': dataset does not exist
ubuntu@ip-10-1-2-87:/backups$ sudo zfs load-key mysql/data
ubuntu@ip-10-1-2-87:/backups$ sudo zfs load-key mysql/logs
ubuntu@ip-10-1-2-87:/backups$ sudo zfs mount -a
filesystem 'mysql/data' can not be mounted: Invalid exchange
cannot mount 'mysql/data': Invalid argument
ubuntu@ip-10-1-2-87:/backups$```

Describe how to reproduce the problem

This gist will walk through bootstrapping an instance, building ZFS running the tests up to the problem:

https://gist.github.com/dotmanila/82c1dc620149827fc81fafe6af30130d

[tcaputi]

This problem is being caused by a problem with the raw send file format. This shouldn't be hard to fix, but it will require upgrading ZFS on both the source and the target machines (once I have a patch) to fix it.

[stale]

This issue has been automatically marked as "stale" because it has not had any activity for a while. It will be closed in 90 days if no further activity occurs. Thank you for your contributions.