** Description changed: + == SRU Justification Focal == + + [Impact] + https://github.com/openzfs/zfs/issues/12462 Ubuntu 20.04.2 LTS Kernel: 5.11.0-25-generic #27~20.04.1-Ubuntu zfs-0.8.3-1ubuntu12.12 zfs-kmod-2.0.2-1ubuntu5 Trying to run zfs send | receive and getting an error: # zfs send 'rpool/home'@'autosnap_2020-08-01_00:59:01_monthly' | zfs receive -s -F 'nas/rpool_backup/home' cannot receive: failed to read from stream cannot receive new filesystem stream: dataset does not exist This used to work before the recent Ubuntu kernel update from 5.8 to 5.11 Kernel 5.8 came with zfs-kmod-0.8.4-1ubuntu11.2 Ubuntu updates that broke it: Upgrade: linux-headers-generic-hwe-20.04:amd64 (5.8.0.63.71~20.04.45, 5.11.0.25.27~20.04.10), linux- image-generic-hwe-20.04:amd64 (5.8.0.63.71~20.04.45, 5.11.0.25.27~20.04.10), linux-generic-hwe-20.04 :amd64 (5.8.0.63.71~20.04.45, 5.11.0.25.27~20.04.10) Sending the zfs send part to a file works, but then sending the file to zfs receive also fails. The dump file size seems reasonable but the contents may not be correct. + + [Test Plan] + + 1. create test pool and backup pool + + sudo zpool create pool /dev/vdb1 + sudo zpool create backup /dev/vdc1 + + 2. populate pool with some files and create some snapshots + + sudo zfs snapshot pool@now1 + + create some more files etc, make another snapshot + + sudo zfs snapshot pool@now2 + + 3. perform send/recv using -s option: + + sudo zfs send pool@now1 | sudo zfs receive -vFs backup + sudo zfs send -i pool@now1 pool@now2 | sudo zfs receive -vFs backup + + Without the fix, the -s option on the receive fails. With the fix it + works fine. Test with focal 5.4 and 5.11 kernel to exercise 0.8.x and + 2.x kernel ZFS drivers. + + [Where problems could occur] + + The main fix nullifies the deprecated action_handle option so that it's + not checked, this allows 0.8.x userspace it to be forwardly compatible + with 2.x kernel ZFS and also since it is deprecated in 0.8.x it makes + not difference to the 0.8.x kernel ZFS driver. Thus the risk with patch + action_handle is very small. + + Included in the fix is a send/recv upstream bug fix 4910-Fix-EIO-after- + resuming-receive-of-new-dataset-over-a.patch that makes send/recv more + resilient. This change again is a small risk.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1939177 Title: Ubuntu 20.04.2 LTS kernel 5.11.0-25 zfs send | receive broken To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1939177/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
