rc1

also changed internal logic: thinner now isnt actually created when --no-thinning is active.

When using --no-thinning --no-snapshot --no-send it still does usefull stuff like checking common snapshots and showing incompatible snapshots

.github/workflows/python-publish.yml

@@ -28,12 +28,12 @@ jobs:
     - name: Install dependencies 3.x
       run: |
         python -m pip install --upgrade pip
-        pip install setuptools wheel twine
+        pip3 install setuptools wheel twine
 
     - name: Install dependencies 2.x
       run: |
         python2 -m pip install --upgrade pip
-        pip2 install setuptools
+        pip2 install setuptools wheel twine
 
     - name: Build and publish
       env:

.github/workflows/regression.yml

@@ -17,7 +17,7 @@ jobs:
 
 
       - name: Prepare
-        run: sudo apt update && sudo apt install zfsutils-linux && sudo -H pip3 install coverage unittest2 mock==3.0.5 coveralls
+        run: sudo apt update && sudo apt install zfsutils-linux lzop pigz zstd gzip xz-utils lz4 mbuffer && sudo -H pip3 install coverage unittest2 mock==3.0.5 coveralls
 
 
       - name: Regression test
@@ -39,7 +39,7 @@ jobs:
 
 
       - name: Prepare
-        run: sudo apt update && sudo apt install zfsutils-linux python3-setuptools && sudo -H pip3 install coverage unittest2 mock==3.0.5 coveralls
+        run: sudo apt update && sudo apt install zfsutils-linux python3-setuptools lzop pigz zstd gzip xz-utils liblz4-tool mbuffer && sudo -H pip3 install coverage unittest2 mock==3.0.5 coveralls
 
 
       - name: Regression test
@@ -64,7 +64,7 @@ jobs:
           python-version: '2.x'
 
       - name: Prepare
-        run: sudo apt update && sudo apt install zfsutils-linux python-setuptools && sudo -H pip install coverage unittest2 mock==3.0.5 coveralls
+        run: sudo apt update && sudo apt install zfsutils-linux python-setuptools lzop pigz zstd gzip xz-utils liblz4-tool mbuffer && sudo -H pip install coverage unittest2 mock==3.0.5 coveralls colorama
 
       - name: Regression test
         run: sudo -E ./tests/run_tests

.gitignore

@@ -11,4 +11,4 @@ __pycache__
 python2.env
 venv
 .idea
-OQ
+password.sh

README.md

@@ -5,7 +5,7 @@
 
 ## Introduction
 
-This is a tool I wrote to make replicating ZFS datasets easy and reliable.
+ZFS-autobackup tries to be the most reliable and easiest to use tool, while having all the features.
 
 You can either use it as a **backup** tool, **replication** tool or **snapshot** tool.
 
@@ -13,12 +13,10 @@ You can select what to backup by setting a custom `ZFS property`. This makes it
 
 Other settings are just specified on the commandline: Simply setup and test your zfs-autobackup command and  fix all the issues you might encounter. When you're done you can just copy/paste your command to a cron or script.
 
-Since its using ZFS commands, you can see what its actually doing by specifying `--debug`. This also helps a lot if you run into some strange problem or error. You can just copy-paste the command that fails and play around with it on the commandline. (something I missed in other tools)
+Since its using ZFS commands, you can see what it's actually doing by specifying `--debug`. This also helps a lot if you run into some strange problem or error. You can just copy-paste the command that fails and play around with it on the commandline. (something I missed in other tools)
 
 An important feature thats missing from other tools is a reliable `--test` option: This allows you to see what zfs-autobackup will do and tune your parameters. It will do everything, except make changes to your system.
 
-zfs-autobackup tries to be the easiest to use backup tool for zfs.
-
 ## Features
 
 * Works across operating systems: Tested with **Linux**, **FreeBSD/FreeNAS** and **SmartOS**.
@@ -32,7 +30,11 @@ zfs-autobackup tries to be the easiest to use backup tool for zfs.
   * "pull" remote data from a server via SSH and backup it locally.
   * Or even pull data from a server while pushing the backup to another server. (Zero trust between source and target server)
 * Can be scheduled via a simple cronjob or run directly from commandline.
-* Supports resuming of interrupted transfers. 
+* Supports resuming of interrupted transfers.
+* ZFS encryption support: Can decrypt / encrypt or even re-encrypt datasets during transfer.
+* Supports sending with compression. (Using pigz, zstd etc)
+* IO buffering to speed up transfer.
+* Bandwidth rate limiting.
 * Multiple backups from and to the same datasets are no problem.
 * Creates the snapshot before doing anything else. (assuring you at least have a snapshot if all else fails)
 * Checks everything but tries continue on non-fatal errors when possible. (Reports error-count when done)
@@ -42,14 +44,18 @@ zfs-autobackup tries to be the easiest to use backup tool for zfs.
 * Uses zfs-holds on important snapshots so they cant be accidentally destroyed.
 * Automatic resuming of failed transfers.
 * Can continue from existing common snapshots. (e.g. easy migration)
-* Gracefully handles destroyed datasets on source.
+* Gracefully handles datasets that no longer exist on source.
+* Support for ZFS sending/receiving through custom pipes.
 * Easy installation:
-  * Just install zfs-autobackup via pip, or download it manually.
-  * Written in python and uses zfs-commands, no 3rd party dependency's or libraries needed.
+  * Just install zfs-autobackup via pip.
+  * Only needs to be installed on one side.
+  * Written in python and uses zfs-commands, no special 3rd party dependency's or compiled libraries needed.
   * No separate config files or properties. Just one zfs-autobackup command you can copy/paste in your backup script.
 
 ## Installation
 
+You only need to install zfs-autobackup on the side that initiates the backup. The other side doesnt need any extra configration.
+
 ### Using pip
 
 The recommended way on most servers is to use [pip](https://pypi.org/project/zfs-autobackup/):
@@ -60,6 +66,8 @@ The recommended way on most servers is to use [pip](https://pypi.org/project/zfs
 
 This can also be used to upgrade zfs-autobackup to the newest stable version.
 
+To install the latest beta version add the `--pre` option.
+
 ### Using easy_install
 
 On older servers you might have to use easy_install
@@ -148,6 +156,8 @@ rpool/swap                              autobackup:offsite1  true
 ...
 ```
 
+ZFS properties are ```inherited``` by child datasets. Since we've set the property on the highest dataset, we're essentially backupping the whole pool.
+
 Because we don't want to backup everything, we can exclude certain filesystem by setting the property to false:
 
 ```console
@@ -163,6 +173,13 @@ rpool/swap                              autobackup:offsite1  false
 ...
 ```
 
+The autobackup-property can have 3 values:
+ * ```true```: Backup the dataset and all its children 
+ * ```false```: Dont backup the dataset and all its children. (used to exclude certain datasets)
+ * ```child```: Only backup the children off the dataset, not the dataset itself.
+
+Only use the zfs-command to set these properties, not the zpool command. 
+
 ### Running zfs-autobackup
 
 Run the script on the backup server and pull the data from the server specified by --ssh-source.
@@ -358,6 +375,48 @@ zfs-autobackup will re-evaluate this on every run: As soon as a snapshot doesn't
 
 Snapshots on the source that still have to be send to the target wont be destroyed off course. (If the target still wants them, according to the target schedule)
 
+## How zfs-autobackup handles encryption
+
+In normal operation datasets are transferred unaltered:
+
+* Source datasets that are encrypted will be send over as such and stay encrypted at the target side. (In ZFS this is called raw-mode) You dont need keys at the target side if you dont want to access the data.
+* Source datasets that are plain will stay that way on the target. (Even if the specified target-path IS encrypted.) 
+
+Basically you dont have to do anything or worry about anything. 
+
+### Decrypting/encrypting
+
+Things get different if you want to change the encryption-state of a dataset during transfer:
+
+* If you want to decrypt encrypted datasets before sending them, you should use the `--decrypt` option. Datasets will then be stored plain at the target.
+* If you want to encrypt plain datasets when they are received, you should use the `--encrypt` option. Datasets will then be stored encrypted at the target. (Datasets that are already encrypted will still be sent over unaltered in raw-mode.) 
+* If you also want re-encrypt encrypted datasets with the target-side encryption you can use both options. 
+
+Note 1: The --encrypt option will rely on inheriting encryption parameters from the parent datasets on the target side. You are responsible for setting those up and loading the keys. So --encrypt is no guarantee for encryption: If you dont set it up, it cant encrypt.
+
+Note 2: Decide what you want at an early stage: If you change the --encrypt or --decrypt parameter after the inital sync you might get weird and wonderfull errors. (nothing dangerous)
+
+I'll add some tips when the issues start to get in on github. :)
+
+## Transfer buffering, compression and rate limiting.
+
+If you're transferring over a slow link it might be useful to use `--compress=zstd-fast`. This will compres the data before sending, so it uses less bandwidth.
+
+You can also limit the datarate by using the `--rate` option.
+
+The `--buffer` option might also help since it acts as an IO buffer: zfs send can vary wildly between completely idle and huge bursts of data. When zfs send is idle, the buffer will continue transferring data over the slow link.
+
+It's also possible to add custom send or receive pipes with `--send-pipe` and `--recv-pipe`.
+
+These options all work together and the buffer on the receiving side is only added if appropriate. When all options are active:
+
+#### On the sending side:
+
+zfs send -> send buffer -> custom send pipes -> compression -> transfer rate limiter
+
+#### On the receiving side:
+decompression -> custom recv pipes -> buffer -> zfs recv
+
 ## Tips
 
 * Use ```--debug``` if something goes wrong and you want to see the commands that are executed. This will also stop at the first error.
@@ -370,6 +429,8 @@ Snapshots on the source that still have to be send to the target wont be destroy
 
 If you have a large number of datasets its important to keep the following tips in mind.
 
+Also it might help to use the --buffer option to add IO buffering during the data transfer. This might speed up things since it smooths out sudden IO bursts that are frequent during a zfs send or recv.
+
 #### Some statistics
 
 To get some idea of how fast zfs-autobackup is, I did some test on my laptop, with a SKHynix_HFS512GD9TNI-L2B0B disk. I'm using zfs 2.0.2.  
@@ -427,25 +488,26 @@ Look in man ssh_config for many more options.
 
 ## Usage
 
-Here you find all the options:
+(NOTE: Quite a lot has changed since the current stable version 3.0. The page your are viewing is for upcoming version 3.1 which is still in beta.)
 
 ```console
-[root@server ~]# zfs-autobackup --help
-usage: zfs-autobackup [-h] [--ssh-config SSH_CONFIG] [--ssh-source SSH_SOURCE]
-                      [--ssh-target SSH_TARGET] [--keep-source KEEP_SOURCE]
-                      [--keep-target KEEP_TARGET] [--other-snapshots]
-                      [--no-snapshot] [--no-send] [--min-change MIN_CHANGE]
-                      [--allow-empty] [--ignore-replicated] [--no-holds]
-                      [--strip-path STRIP_PATH] [--clear-refreservation]
-                      [--clear-mountpoint]
-                      [--filter-properties FILTER_PROPERTIES]
-                      [--set-properties SET_PROPERTIES] [--rollback]
-                      [--destroy-incompatible] [--ignore-transfer-errors]
-                      [--raw] [--test] [--verbose] [--debug] [--debug-output]
-                      [--progress]
+usage: zfs-autobackup [-h] [--ssh-config CONFIG-FILE] [--ssh-source USER@HOST]
+                      [--ssh-target USER@HOST] [--keep-source SCHEDULE]
+                      [--keep-target SCHEDULE] [--other-snapshots]
+                      [--no-snapshot] [--no-send] [--no-thinning] [--no-holds]
+                      [--min-change BYTES] [--allow-empty]
+                      [--ignore-replicated] [--strip-path N]
+                      [--clear-refreservation] [--clear-mountpoint]
+                      [--filter-properties PROPERY,...]
+                      [--set-properties PROPERTY=VALUE,...] [--rollback]
+                      [--destroy-incompatible] [--destroy-missing SCHEDULE]
+                      [--ignore-transfer-errors] [--decrypt] [--encrypt]
+                      [--test] [--verbose] [--debug] [--debug-output]
+                      [--progress] [--send-pipe COMMAND] [--recv-pipe COMMAND]
+                      [--compress TYPE] [--rate DATARATE] [--buffer SIZE]
                       backup-name [target-path]
 
-zfs-autobackup v3.0-rc12 - Copyright 2020 E.H.Eefting (edwin@datux.nl)
+zfs-autobackup v3.1-beta6 - (c)2021 E.H.Eefting (edwin@datux.nl)
 
 positional arguments:
   backup-name           Name of the backup (you should set the zfs property
@@ -457,18 +519,16 @@ positional arguments:
 
 optional arguments:
   -h, --help            show this help message and exit
-  --ssh-config SSH_CONFIG
+  --ssh-config CONFIG-FILE
                         Custom ssh client config
-  --ssh-source SSH_SOURCE
-                        Source host to get backup from. (user@hostname)
-                        Default None.
-  --ssh-target SSH_TARGET
-                        Target host to push backup to. (user@hostname) Default
-                        None.
-  --keep-source KEEP_SOURCE
+  --ssh-source USER@HOST
+                        Source host to get backup from.
+  --ssh-target USER@HOST
+                        Target host to push backup to.
+  --keep-source SCHEDULE
                         Thinning schedule for old source snapshots. Default:
                         10,1d1w,1w1m,1m1y
-  --keep-target KEEP_TARGET
+  --keep-target SCHEDULE
                         Thinning schedule for old target snapshots. Default:
                         10,1d1w,1w1m,1m1y
   --other-snapshots     Send over other snapshots as well, not just the ones
@@ -477,18 +537,18 @@ optional arguments:
                         uncompleted backups, or cleanups)
   --no-send             Don't send snapshots (useful for cleanups, or if you
                         want a serperate send-cronjob)
-  --min-change MIN_CHANGE
-                        Number of bytes written after which we consider a
+  --no-thinning         Do not destroy any snapshots.
+  --no-holds            Don't hold snapshots. (Faster. Allows you to destroy
+                        common snapshot.)
+  --min-change BYTES    Number of bytes written after which we consider a
                         dataset changed (default 1)
   --allow-empty         If nothing has changed, still create empty snapshots.
                         (same as --min-change=0)
   --ignore-replicated   Ignore datasets that seem to be replicated some other
                         way. (No changes since lastest snapshot. Useful for
                         proxmox HA replication)
-  --no-holds            Don't lock snapshots on the source. (Useful to allow
-                        proxmox HA replication to switches nodes)
-  --strip-path STRIP_PATH
-                        Number of directories to strip from target path (use 1
+
+  --strip-path N        Number of directories to strip from target path (use 1
                         when cloning zones between 2 SmartOS machines)
   --clear-refreservation
                         Filter "refreservation" property. (recommended, safes
@@ -496,11 +556,11 @@ optional arguments:
   --clear-mountpoint    Set property canmount=noauto for new datasets.
                         (recommended, prevents mount conflicts. same as --set-
                         properties canmount=noauto)
-  --filter-properties FILTER_PROPERTIES
+  --filter-properties PROPERY,...
                         List of properties to "filter" when receiving
                         filesystems. (you can still restore them with zfs
                         inherit -S)
-  --set-properties SET_PROPERTIES
+  --set-properties PROPERTY=VALUE,...
                         List of propererties to override when receiving
                         filesystems. (you can still restore them with zfs
                         inherit -S)
@@ -510,22 +570,36 @@ optional arguments:
   --destroy-incompatible
                         Destroy incompatible snapshots on target. Use with
                         care! (implies --rollback)
+  --destroy-missing SCHEDULE
+                        Destroy datasets on target that are missing on the
+                        source. Specify the time since the last snapshot, e.g:
+                        --destroy-missing 30d
   --ignore-transfer-errors
                         Ignore transfer errors (still checks if received
                         filesystem exists. useful for acltype errors)
-  --raw                 For encrypted datasets, send data exactly as it exists
-                        on disk.
+  --decrypt             Decrypt data before sending it over.
+  --encrypt             Encrypt data after receiving it.
   --test                dont change anything, just show what would be done
                         (still does all read-only operations)
   --verbose             verbose output
   --debug               Show zfs commands that are executed, stops after an
                         exception.
   --debug-output        Show zfs commands and their output/exit codes. (noisy)
-  --progress            show zfs progress output (to stderr). Enabled by
-                        default on ttys.
+  --progress            show zfs progress output. Enabled automaticly on ttys.
+                        (use --no-progress to disable)
+  --send-pipe COMMAND   pipe zfs send output through COMMAND (can be used
+                        multiple times)
+  --recv-pipe COMMAND   pipe zfs recv input through COMMAND (can be used
+                        multiple times)
+  --compress TYPE       Use compression during transfer, zstd-fast
+                        recommended. (zstd-slow, xz, pigz-fast, lz4, pigz-
+                        slow, zstd-fast, gzip, lzo)
+  --rate DATARATE       Limit data transfer rate (e.g. 128K. requires
+                        mbuffer.)
+  --buffer SIZE         Add zfs send and recv buffers to smooth out IO bursts.
+                        (e.g. 128M. requires mbuffer)
 
-When a filesystem fails, zfs_backup will continue and report the number of
-failures at that end. Also the exit code will indicate the number of failures.
+Full manual at: https://github.com/psy0rz/zfs_autobackup
 ```
 
 ## Troubleshooting
@@ -542,15 +616,19 @@ This usually means you've created a new snapshot on the target side during a bac
 
 This means files have been modified on the target side somehow. 
 
-You can use --rollback to automaticly rollback such changes.
-
-Note: This usually happens if the source-side has a non-standard mountpoint for a dataset, and you're using --clear-mountpoint. In this case the target side creates a mountpoint in the parent dataset, causing the change. 
+You can use --rollback to automaticly rollback such changes. Also try destroying the target dataset and using --clear-mountpoint on the next run. This way it wont get mounted.
 
 ### It says 'internal error: Invalid argument'
 
 In some cases (Linux -> FreeBSD) this means certain properties are not fully supported on the target system.
 
-Try using something like: --filter-properties xattr
+Try using something like: --filter-properties xattr or --ignore-transfer-errors. 
+
+### zfs receive fails, but snapshot seems to be received successful.
+
+This happens if you transfer between different Operating systems/zfs versions or feature sets.
+
+Try using the --ignore-transfer-errors option. This will ignore the error. It will still check if the snapshot is actually received correctly.
 
 ## Restore example
 
@@ -654,10 +732,10 @@ for HOST in $HOSTS; do
 done
 ```
 
-This script will also send the backup status to Zabbix. (if you've installed my zabbix-job-status script)
+This script will also send the backup status to Zabbix. (if you've installed my zabbix-job-status script https://github.com/psy0rz/stuff/tree/master/zabbix-jobs)
 
 # Sponsor list
 
 This project was sponsorred by:
 
-* (None so far)
+* JetBrains (Provided me with a license for their whole professional product line, https://www.jetbrains.com/pycharm/ )

requirements.txt

@@ -1,6 +1,6 @@
 colorama
 argparse
-coverage==4.5.4
+coverage
 python-coveralls
 unittest2
 mock

tests/autoruntests

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+#NOTE: run from top directory
+
+find tests/*.py zfs_autobackup/*.py| entr -r ./tests/run_tests $@
+

tests/basetest.py

@@ -1,4 +1,6 @@
 
+# To run tests as non-root, use this hack:
+# chmod 4755 /usr/sbin/zpool /usr/sbin/zfs
 
 import subprocess
 import random
@@ -58,7 +60,8 @@ def redirect_stderr(target):
 
 def shelltest(cmd):
     """execute and print result as nice copypastable string for unit tests (adds extra newlines on top/bottom)"""
-    ret=(subprocess.check_output(cmd , shell=True).decode('utf-8'))
+
+    ret=(subprocess.check_output("SUDO_ASKPASS=./password.sh sudo -A "+cmd , shell=True).decode('utf-8'))
     print("######### result of: {}".format(cmd))
     print(ret)
     print("#########")

tests/run_tests

@@ -19,7 +19,7 @@ if ! [ -e /root/.ssh/id_rsa ]; then
 fi
 
 
-coverage run --source zfs_autobackup -m unittest discover -vvvvf $SCRIPTDIR $@ 2>&1
+coverage run --branch --source zfs_autobackup -m unittest discover -vvvvf $SCRIPTDIR $@ 2>&1
 EXIT=$?
 
 echo

tests/test_cmdpipe.py

@@ -0,0 +1,123 @@
+from basetest import *
+from zfs_autobackup.CmdPipe import CmdPipe,CmdItem
+
+
+class TestCmdPipe(unittest2.TestCase):
+
+    def test_single(self):
+        """single process stdout and stderr"""
+        p=CmdPipe(readonly=False, inp=None)
+        err=[]
+        out=[]
+        p.add(CmdItem(["ls", "-d", "/", "/", "/nonexistent"], stderr_handler=lambda line: err.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,2)))
+        executed=p.execute(stdout_handler=lambda line: out.append(line))
+
+        self.assertEqual(err, ["ls: cannot access '/nonexistent': No such file or directory"])
+        self.assertEqual(out, ["/","/"])
+        self.assertIsNone(executed)
+
+    def test_input(self):
+        """test stdinput"""
+        p=CmdPipe(readonly=False, inp="test")
+        err=[]
+        out=[]
+        p.add(CmdItem(["cat"], stderr_handler=lambda line: err.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,0)))
+        executed=p.execute(stdout_handler=lambda line: out.append(line))
+
+        self.assertEqual(err, [])
+        self.assertEqual(out, ["test"])
+        self.assertIsNone(executed)
+
+    def test_pipe(self):
+        """test piped"""
+        p=CmdPipe(readonly=False)
+        err1=[]
+        err2=[]
+        err3=[]
+        out=[]
+        p.add(CmdItem(["echo", "test"], stderr_handler=lambda line: err1.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,0)))
+        p.add(CmdItem(["tr", "e", "E"], stderr_handler=lambda line: err2.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,0)))
+        p.add(CmdItem(["tr", "t", "T"], stderr_handler=lambda line: err3.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,0)))
+        executed=p.execute(stdout_handler=lambda line: out.append(line))
+
+        self.assertEqual(err1, [])
+        self.assertEqual(err2, [])
+        self.assertEqual(err3, [])
+        self.assertEqual(out, ["TEsT"])
+        self.assertIsNone(executed)
+
+        #test str representation as well
+        self.assertEqual(str(p), "(echo test) | (tr e E) | (tr t T)")
+
+    def test_pipeerrors(self):
+        """test piped stderrs """
+        p=CmdPipe(readonly=False)
+        err1=[]
+        err2=[]
+        err3=[]
+        out=[]
+        p.add(CmdItem(["ls", "/nonexistent1"], stderr_handler=lambda line: err1.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,2)))
+        p.add(CmdItem(["ls", "/nonexistent2"], stderr_handler=lambda line: err2.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,2)))
+        p.add(CmdItem(["ls", "/nonexistent3"], stderr_handler=lambda line: err3.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,2)))
+        executed=p.execute(stdout_handler=lambda line: out.append(line))
+
+        self.assertEqual(err1, ["ls: cannot access '/nonexistent1': No such file or directory"])
+        self.assertEqual(err2, ["ls: cannot access '/nonexistent2': No such file or directory"])
+        self.assertEqual(err3, ["ls: cannot access '/nonexistent3': No such file or directory"])
+        self.assertEqual(out, [])
+        self.assertIsNone(executed)
+
+    def test_exitcode(self):
+        """test piped exitcodes """
+        p=CmdPipe(readonly=False)
+        err1=[]
+        err2=[]
+        err3=[]
+        out=[]
+        p.add(CmdItem(["bash", "-c", "exit 1"], stderr_handler=lambda line: err1.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,1)))
+        p.add(CmdItem(["bash", "-c", "exit 2"], stderr_handler=lambda line: err2.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,2)))
+        p.add(CmdItem(["bash", "-c", "exit 3"], stderr_handler=lambda line: err3.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,3)))
+        executed=p.execute(stdout_handler=lambda line: out.append(line))
+
+        self.assertEqual(err1, [])
+        self.assertEqual(err2, [])
+        self.assertEqual(err3, [])
+        self.assertEqual(out, [])
+        self.assertIsNone(executed)
+
+    def test_readonly_execute(self):
+        """everything readonly, just should execute"""
+
+        p=CmdPipe(readonly=True)
+        err1=[]
+        err2=[]
+        out=[]
+
+        def true_exit(exit_code):
+            return True
+
+        p.add(CmdItem(["echo", "test1"], stderr_handler=lambda line: err1.append(line), exit_handler=true_exit, readonly=True))
+        p.add(CmdItem(["echo", "test2"], stderr_handler=lambda line: err2.append(line), exit_handler=true_exit, readonly=True))
+        executed=p.execute(stdout_handler=lambda line: out.append(line))
+
+        self.assertEqual(err1, [])
+        self.assertEqual(err2, [])
+        self.assertEqual(out, ["test2"])
+        self.assertTrue(executed)
+
+    def test_readonly_skip(self):
+        """one command not readonly, skip"""
+
+        p=CmdPipe(readonly=True)
+        err1=[]
+        err2=[]
+        out=[]
+        p.add(CmdItem(["echo", "test1"], stderr_handler=lambda line: err1.append(line), readonly=False))
+        p.add(CmdItem(["echo", "test2"], stderr_handler=lambda line: err2.append(line), readonly=True))
+        executed=p.execute(stdout_handler=lambda line: out.append(line))
+
+        self.assertEqual(err1, [])
+        self.assertEqual(err2, [])
+        self.assertEqual(out, [])
+        self.assertTrue(executed)
+

tests/test_destroymissing.py

@@ -14,16 +14,16 @@ class TestZfsNode(unittest2.TestCase):
 
         #initial backup
         with patch('time.strftime', return_value="10101111000000"): #1000 years in past
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-holds".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-holds".split(" ")).run())
 
         with patch('time.strftime', return_value="20101111000000"): #far in past
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-holds --allow-empty".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-holds --allow-empty".split(" ")).run())
 
 
         with self.subTest("Should do nothing yet"):
             with OutputIO() as buf:
                 with redirect_stdout(buf):
-                    self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-snapshot --destroy-missing 0s".split(" ")).run())
+                    self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-snapshot --destroy-missing 0s".split(" ")).run())
 
                 print(buf.getvalue())
                 self.assertNotIn(": Destroy missing", buf.getvalue())
@@ -36,7 +36,7 @@ class TestZfsNode(unittest2.TestCase):
 
             with OutputIO() as buf:
                 with redirect_stdout(buf), redirect_stderr(buf):
-                        self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-snapshot --destroy-missing 0s".split(" ")).run())
+                        self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-snapshot --destroy-missing 0s".split(" ")).run())
 
                 print(buf.getvalue())
                 #should have done the snapshot cleanup for destoy missing:
@@ -54,7 +54,7 @@ class TestZfsNode(unittest2.TestCase):
             with OutputIO() as buf:
                 with redirect_stdout(buf):
                     #100y: lastest should not be old enough, while second to latest snapshot IS old enough:
-                    self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-snapshot --destroy-missing 100y".split(" ")).run())
+                    self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-snapshot --destroy-missing 100y".split(" ")).run())
 
                 print(buf.getvalue())
                 self.assertIn(": Waiting for deadline", buf.getvalue())
@@ -62,7 +62,7 @@ class TestZfsNode(unittest2.TestCase):
             #past deadline, destroy
             with OutputIO() as buf:
                 with redirect_stdout(buf):
-                    self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-snapshot --destroy-missing 1y".split(" ")).run())
+                    self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-snapshot --destroy-missing 1y".split(" ")).run())
 
                 print(buf.getvalue())
                 self.assertIn("sub: Destroying", buf.getvalue())
@@ -75,7 +75,7 @@ class TestZfsNode(unittest2.TestCase):
 
             with OutputIO() as buf:
                 with redirect_stdout(buf):
-                    self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-snapshot --destroy-missing 0s".split(" ")).run())
+                    self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-snapshot --destroy-missing 0s".split(" ")).run())
 
                 print(buf.getvalue())
 
@@ -90,13 +90,13 @@ class TestZfsNode(unittest2.TestCase):
 
             with OutputIO() as buf:
                 with redirect_stdout(buf), redirect_stderr(buf):
-                        self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-snapshot --destroy-missing 0s".split(" ")).run())
+                        self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-snapshot --destroy-missing 0s".split(" ")).run())
 
                 print(buf.getvalue())
                 #now tries to destroy our own last snapshot (before the final destroy of the dataset)
                 self.assertIn("fs1@test-20101111000000: Destroying", buf.getvalue())
                 #but cant finish because still in use:
-                self.assertIn("fs1: Error during destoy missing", buf.getvalue())
+                self.assertIn("fs1: Error during --destroy-missing", buf.getvalue())
 
             shelltest("zfs destroy test_target1/clone1")
 
@@ -105,7 +105,7 @@ class TestZfsNode(unittest2.TestCase):
 
             with OutputIO() as buf:
                 with redirect_stdout(buf), redirect_stderr(buf):
-                        self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-snapshot --destroy-missing 0s".split(" ")).run())
+                        self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-snapshot --destroy-missing 0s".split(" ")).run())
 
                 print(buf.getvalue())
                 #should have done the snapshot cleanup for destoy missing:
@@ -113,7 +113,7 @@ class TestZfsNode(unittest2.TestCase):
 
             with OutputIO() as buf:
                 with redirect_stdout(buf), redirect_stderr(buf):
-                        self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-snapshot --destroy-missing 0s".split(" ")).run())
+                        self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-snapshot --destroy-missing 0s".split(" ")).run())
 
                 print(buf.getvalue())
                 #on second run it sees the dangling ex-parent but doesnt know what to do with it (since it has no own snapshot)

tests/test_encryption.py

@@ -0,0 +1,192 @@
+from zfs_autobackup.CmdPipe import CmdPipe
+from basetest import *
+import time
+
+# We have to do a LOT to properly test encryption/decryption/raw transfers
+#
+# For every scenario we need at least:
+# - plain source dataset
+# - encrypted source dataset
+# - plain target path
+# - encrypted target path
+# - do a full transfer
+# - do a incremental transfer
+
+# Scenarios:
+# - Raw transfer
+# - Decryption transfer (--decrypt)
+# - Encryption transfer (--encrypt)
+# - Re-encryption transfer (--decrypt --encrypt)
+
+class TestZfsEncryption(unittest2.TestCase):
+
+
+    def setUp(self):
+        prepare_zpools()
+
+        try:
+            shelltest("zfs get encryption test_source1")
+        except:
+            self.skipTest("Encryption not supported on this ZFS version.")
+
+    def prepare_encrypted_dataset(self, key, path, unload_key=False):
+
+        # create encrypted source dataset
+        shelltest("echo {} > /tmp/zfstest.key".format(key))
+        shelltest("zfs create -o keylocation=file:///tmp/zfstest.key -o keyformat=passphrase -o encryption=on {}".format(path))
+
+        if unload_key:
+            shelltest("zfs unmount {}".format(path))
+            shelltest("zfs unload-key {}".format(path))
+
+        # r=shelltest("dd if=/dev/zero of=/test_source1/fs1/enc1/data.txt bs=200000 count=1")
+
+    def  test_raw(self):
+        """send encrypted data unaltered (standard operation)"""
+
+        self.prepare_encrypted_dataset("11111111", "test_source1/fs1/encryptedsource")
+        self.prepare_encrypted_dataset("11111111", "test_source1/fs1/encryptedsourcekeyless", unload_key=True) # raw mode shouldn't need a key
+        self.prepare_encrypted_dataset("22222222", "test_target1/encryptedtarget")
+
+        with patch('time.strftime', return_value="20101111000000"):
+            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-progress --allow-empty --exclude-received".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1/encryptedtarget --verbose --no-progress --no-snapshot --exclude-received".split(" ")).run())
+
+        with patch('time.strftime', return_value="20101111000001"):
+            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-progress --allow-empty --exclude-received".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1/encryptedtarget --verbose --no-progress --no-snapshot --exclude-received".split(" ")).run())
+
+        r = shelltest("zfs get -r -t filesystem encryptionroot test_target1")
+        self.assertMultiLineEqual(r,"""
+NAME                                                                  PROPERTY        VALUE                                                                 SOURCE
+test_target1                                                          encryptionroot  -                                                                     -
+test_target1/encryptedtarget                                          encryptionroot  test_target1/encryptedtarget                                          -
+test_target1/encryptedtarget/test_source1                             encryptionroot  test_target1/encryptedtarget                                          -
+test_target1/encryptedtarget/test_source1/fs1                         encryptionroot  -                                                                     -
+test_target1/encryptedtarget/test_source1/fs1/encryptedsource         encryptionroot  test_target1/encryptedtarget/test_source1/fs1/encryptedsource         -
+test_target1/encryptedtarget/test_source1/fs1/encryptedsourcekeyless  encryptionroot  test_target1/encryptedtarget/test_source1/fs1/encryptedsourcekeyless  -
+test_target1/encryptedtarget/test_source1/fs1/sub                     encryptionroot  -                                                                     -
+test_target1/encryptedtarget/test_source2                             encryptionroot  test_target1/encryptedtarget                                          -
+test_target1/encryptedtarget/test_source2/fs2                         encryptionroot  test_target1/encryptedtarget                                          -
+test_target1/encryptedtarget/test_source2/fs2/sub                     encryptionroot  -                                                                     -
+test_target1/test_source1                                             encryptionroot  -                                                                     -
+test_target1/test_source1/fs1                                         encryptionroot  -                                                                     -
+test_target1/test_source1/fs1/encryptedsource                         encryptionroot  test_target1/test_source1/fs1/encryptedsource                         -
+test_target1/test_source1/fs1/encryptedsourcekeyless                  encryptionroot  test_target1/test_source1/fs1/encryptedsourcekeyless                  -
+test_target1/test_source1/fs1/sub                                     encryptionroot  -                                                                     -
+test_target1/test_source2                                             encryptionroot  -                                                                     -
+test_target1/test_source2/fs2                                         encryptionroot  -                                                                     -
+test_target1/test_source2/fs2/sub                                     encryptionroot  -                                                                     -
+""")
+
+    def  test_decrypt(self):
+        """decrypt data and store unencrypted (--decrypt)"""
+
+        self.prepare_encrypted_dataset("11111111", "test_source1/fs1/encryptedsource")
+        self.prepare_encrypted_dataset("22222222", "test_target1/encryptedtarget")
+
+        with patch('time.strftime', return_value="20101111000000"):
+            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-progress --decrypt --allow-empty --exclude-received".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1/encryptedtarget --verbose --no-progress --decrypt --no-snapshot --exclude-received".split(" ")).run())
+
+        with patch('time.strftime', return_value="20101111000001"):
+            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-progress --decrypt --allow-empty --exclude-received".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1/encryptedtarget --verbose --no-progress --decrypt --no-snapshot --exclude-received".split(" ")).run())
+
+        r = shelltest("zfs get -r -t filesystem encryptionroot test_target1")
+        self.assertEqual(r, """
+NAME                                                           PROPERTY        VALUE                         SOURCE
+test_target1                                                   encryptionroot  -                             -
+test_target1/encryptedtarget                                   encryptionroot  test_target1/encryptedtarget  -
+test_target1/encryptedtarget/test_source1                      encryptionroot  test_target1/encryptedtarget  -
+test_target1/encryptedtarget/test_source1/fs1                  encryptionroot  -                             -
+test_target1/encryptedtarget/test_source1/fs1/encryptedsource  encryptionroot  -                             -
+test_target1/encryptedtarget/test_source1/fs1/sub              encryptionroot  -                             -
+test_target1/encryptedtarget/test_source2                      encryptionroot  test_target1/encryptedtarget  -
+test_target1/encryptedtarget/test_source2/fs2                  encryptionroot  test_target1/encryptedtarget  -
+test_target1/encryptedtarget/test_source2/fs2/sub              encryptionroot  -                             -
+test_target1/test_source1                                      encryptionroot  -                             -
+test_target1/test_source1/fs1                                  encryptionroot  -                             -
+test_target1/test_source1/fs1/encryptedsource                  encryptionroot  -                             -
+test_target1/test_source1/fs1/sub                              encryptionroot  -                             -
+test_target1/test_source2                                      encryptionroot  -                             -
+test_target1/test_source2/fs2                                  encryptionroot  -                             -
+test_target1/test_source2/fs2/sub                              encryptionroot  -                             -
+""")
+
+    def  test_encrypt(self):
+        """send normal data set and store encrypted on the other side (--encrypt) issue #60 """
+
+        self.prepare_encrypted_dataset("11111111", "test_source1/fs1/encryptedsource")
+        self.prepare_encrypted_dataset("22222222", "test_target1/encryptedtarget")
+
+        with patch('time.strftime', return_value="20101111000000"):
+            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-progress --encrypt --debug --allow-empty --exclude-received".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1/encryptedtarget --verbose --no-progress --encrypt --debug --no-snapshot --exclude-received".split(" ")).run())
+
+        with patch('time.strftime', return_value="20101111000001"):
+            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-progress --encrypt --debug --allow-empty --exclude-received".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1/encryptedtarget --verbose --no-progress --encrypt --debug --no-snapshot --exclude-received".split(" ")).run())
+
+        r = shelltest("zfs get -r -t filesystem encryptionroot test_target1")
+        self.assertEqual(r, """
+NAME                                                           PROPERTY        VALUE                                                          SOURCE
+test_target1                                                   encryptionroot  -                                                              -
+test_target1/encryptedtarget                                   encryptionroot  test_target1/encryptedtarget                                   -
+test_target1/encryptedtarget/test_source1                      encryptionroot  test_target1/encryptedtarget                                   -
+test_target1/encryptedtarget/test_source1/fs1                  encryptionroot  test_target1/encryptedtarget                                   -
+test_target1/encryptedtarget/test_source1/fs1/encryptedsource  encryptionroot  test_target1/encryptedtarget/test_source1/fs1/encryptedsource  -
+test_target1/encryptedtarget/test_source1/fs1/sub              encryptionroot  test_target1/encryptedtarget                                   -
+test_target1/encryptedtarget/test_source2                      encryptionroot  test_target1/encryptedtarget                                   -
+test_target1/encryptedtarget/test_source2/fs2                  encryptionroot  test_target1/encryptedtarget                                   -
+test_target1/encryptedtarget/test_source2/fs2/sub              encryptionroot  test_target1/encryptedtarget                                   -
+test_target1/test_source1                                      encryptionroot  -                                                              -
+test_target1/test_source1/fs1                                  encryptionroot  -                                                              -
+test_target1/test_source1/fs1/encryptedsource                  encryptionroot  test_target1/test_source1/fs1/encryptedsource                  -
+test_target1/test_source1/fs1/sub                              encryptionroot  -                                                              -
+test_target1/test_source2                                      encryptionroot  -                                                              -
+test_target1/test_source2/fs2                                  encryptionroot  -                                                              -
+test_target1/test_source2/fs2/sub                              encryptionroot  -                                                              -
+""")
+
+    def test_reencrypt(self):
+        """reencrypt data (--decrypt --encrypt) """
+
+        self.prepare_encrypted_dataset("11111111", "test_source1/fs1/encryptedsource")
+        self.prepare_encrypted_dataset("22222222", "test_target1/encryptedtarget")
+
+        with patch('time.strftime', return_value="20101111000000"):
+            self.assertFalse(ZfsAutobackup(
+                "test test_target1 --verbose --no-progress --decrypt --encrypt --debug --allow-empty --exclude-received".split(" ")).run())
+            self.assertFalse(ZfsAutobackup(
+                "test test_target1/encryptedtarget --verbose --no-progress --decrypt --encrypt --debug --no-snapshot --exclude-received".split(
+                    " ")).run())
+
+        with patch('time.strftime', return_value="20101111000001"):
+            self.assertFalse(ZfsAutobackup(
+                "test test_target1 --verbose --no-progress --decrypt --encrypt --debug --allow-empty --exclude-received".split(" ")).run())
+            self.assertFalse(ZfsAutobackup(
+                "test test_target1/encryptedtarget --verbose --no-progress --decrypt --encrypt --debug --no-snapshot --exclude-received".split(
+                    " ")).run())
+
+        r = shelltest("zfs get -r -t filesystem encryptionroot test_target1")
+        self.assertEqual(r, """
+NAME                                                           PROPERTY        VALUE                         SOURCE
+test_target1                                                   encryptionroot  -                             -
+test_target1/encryptedtarget                                   encryptionroot  test_target1/encryptedtarget  -
+test_target1/encryptedtarget/test_source1                      encryptionroot  test_target1/encryptedtarget  -
+test_target1/encryptedtarget/test_source1/fs1                  encryptionroot  test_target1/encryptedtarget  -
+test_target1/encryptedtarget/test_source1/fs1/encryptedsource  encryptionroot  test_target1/encryptedtarget  -
+test_target1/encryptedtarget/test_source1/fs1/sub              encryptionroot  test_target1/encryptedtarget  -
+test_target1/encryptedtarget/test_source2                      encryptionroot  test_target1/encryptedtarget  -
+test_target1/encryptedtarget/test_source2/fs2                  encryptionroot  test_target1/encryptedtarget  -
+test_target1/encryptedtarget/test_source2/fs2/sub              encryptionroot  test_target1/encryptedtarget  -
+test_target1/test_source1                                      encryptionroot  -                             -
+test_target1/test_source1/fs1                                  encryptionroot  -                             -
+test_target1/test_source1/fs1/encryptedsource                  encryptionroot  -                             -
+test_target1/test_source1/fs1/sub                              encryptionroot  -                             -
+test_target1/test_source2                                      encryptionroot  -                             -
+test_target1/test_source2/fs2                                  encryptionroot  -                             -
+test_target1/test_source2/fs2/sub                              encryptionroot  -                             -
+""")
+

tests/test_executenode.py

@@ -1,5 +1,5 @@
 from basetest import *
-from zfs_autobackup.ExecuteNode import ExecuteNode
+from zfs_autobackup.ExecuteNode import *
 
 print("THIS TEST REQUIRES SSH TO LOCALHOST")
 
@@ -15,7 +15,7 @@ class TestExecuteNode(unittest2.TestCase):
             self.assertEqual(node.run(["echo","test"]), ["test"])
 
         with self.subTest("error exit code"):
-            with self.assertRaises(subprocess.CalledProcessError):
+            with self.assertRaises(ExecuteError):
                 node.run(["false"])
 
         #
@@ -26,9 +26,9 @@ class TestExecuteNode(unittest2.TestCase):
         with self.subTest("multiline tabsplit"):
             self.assertEqual(node.run(["echo","l1c1\tl1c2\nl2c1\tl2c2"], tab_split=True), [['l1c1', 'l1c2'], ['l2c1', 'l2c2']])
 
-        #escaping test (shouldnt be a problem locally, single quotes can be a problem remote via ssh)
+        #escaping test
         with self.subTest("escape test"):
-            s="><`'\"@&$()$bla\\/.*!#test _+-={}[]|"
+            s="><`'\"@&$()$bla\\/.* !#test _+-={}[]|${bla} $bla"
             self.assertEqual(node.run(["echo",s]), [s])
 
         #return std err as well, trigger stderr by listing something non existing
@@ -51,6 +51,15 @@ class TestExecuteNode(unittest2.TestCase):
         with self.subTest("stdin process with inp=None (shouldn't hang)"):
             self.assertEqual(node.run(["cat"]), [])
 
+        # let the system do the piping with an unescaped |:
+        with self.subTest("system piping test"):
+
+            #first make sure the actual | character is still properly escaped:
+            self.assertEqual(node.run(["echo","|"]), ["|"])
+
+            #now pipe
+            self.assertEqual(node.run(["echo", "abc", node.PIPE, "tr", "a", "A" ]), ["Abc"])
+
     def test_basics_local(self):
         node=ExecuteNode(debug_output=True)
         self.basics(node)
@@ -64,7 +73,7 @@ class TestExecuteNode(unittest2.TestCase):
     def test_readonly(self):
         node=ExecuteNode(debug_output=True, readonly=True)
 
-        self.assertEqual(node.run(["echo","test"], readonly=False), None)
+        self.assertEqual(node.run(["echo","test"], readonly=False), [])
         self.assertEqual(node.run(["echo","test"], readonly=True), ["test"])
 
 
@@ -73,7 +82,7 @@ class TestExecuteNode(unittest2.TestCase):
     def pipe(self, nodea, nodeb):
 
         with self.subTest("pipe data"):
-            output=nodea.run(["dd", "if=/dev/zero", "count=1000"], pipe=True)
+            output=nodea.run(["dd", "if=/dev/zero", "count=1000"],pipe=True)
             self.assertEqual(nodeb.run(["md5sum"], inp=output), ["816df6f64deba63b029ca19d880ee10a  -"])
 
         with self.subTest("exit code both ends of pipe ok"):
@@ -81,31 +90,35 @@ class TestExecuteNode(unittest2.TestCase):
             nodeb.run(["true"], inp=output)
 
         with self.subTest("error on pipe input side"):
-            with self.assertRaises(subprocess.CalledProcessError):
+            with self.assertRaises(ExecuteError):
                 output=nodea.run(["false"], pipe=True)
                 nodeb.run(["true"], inp=output)
 
+        with self.subTest("error on both sides, ignore exit codes"):
+            output=nodea.run(["false"], pipe=True, valid_exitcodes=[])
+            nodeb.run(["false"], inp=output, valid_exitcodes=[])
+
         with self.subTest("error on pipe output side "):
-            with self.assertRaises(subprocess.CalledProcessError):
+            with self.assertRaises(ExecuteError):
                 output=nodea.run(["true"], pipe=True)
                 nodeb.run(["false"], inp=output)
 
         with self.subTest("error on both sides of pipe"):
-            with self.assertRaises(subprocess.CalledProcessError):
+            with self.assertRaises(ExecuteError):
                 output=nodea.run(["false"], pipe=True)
                 nodeb.run(["false"], inp=output)
 
         with self.subTest("check stderr on pipe output side"):
-            output=nodea.run(["true"], pipe=True)
-            (stdout, stderr)=nodeb.run(["ls", "nonexistingfile"], inp=output, return_stderr=True, valid_exitcodes=[0,2])
+            output=nodea.run(["true"], pipe=True, valid_exitcodes=[0])
+            (stdout, stderr)=nodeb.run(["ls", "nonexistingfile"], inp=output, return_stderr=True, valid_exitcodes=[2])
             self.assertEqual(stdout,[])
             self.assertRegex(stderr[0], "nonexistingfile" )
 
         with self.subTest("check stderr on pipe input side (should be only printed)"):
-            output=nodea.run(["ls", "nonexistingfile"], pipe=True)
-            (stdout, stderr)=nodeb.run(["true"], inp=output, return_stderr=True, valid_exitcodes=[0,2])
+            output=nodea.run(["ls", "nonexistingfile"], pipe=True, valid_exitcodes=[2])
+            (stdout, stderr)=nodeb.run(["true"], inp=output, return_stderr=True, valid_exitcodes=[0])
             self.assertEqual(stdout,[])
-            self.assertEqual(stderr,[] )
+            self.assertEqual(stderr,[])
 
 
 

tests/test_externalfailures.py

@@ -1,7 +1,7 @@
 from basetest import *
 
 
-class TestZfsNode(unittest2.TestCase):
+class TestExternalFailures(unittest2.TestCase):
 
     def setUp(self):
         prepare_zpools()
@@ -20,7 +20,7 @@ class TestZfsNode(unittest2.TestCase):
         r = shelltest("dd if=/dev/zero of=/test_target1/waste bs=250M count=1")
 
         # should fail and leave resume token (if supported)
-        self.assertTrue(ZfsAutobackup("test test_target1 --verbose".split(" ")).run())
+        self.assertTrue(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
         # free up space
         r = shelltest("rm /test_target1/waste")
@@ -38,7 +38,7 @@ class TestZfsNode(unittest2.TestCase):
         # --test should resume and succeed
         with OutputIO() as buf:
             with redirect_stdout(buf):
-                self.assertFalse(ZfsAutobackup("test test_target1 --verbose --test".split(" ")).run())
+                self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --test".split(" ")).run())
 
             print(buf.getvalue())
 
@@ -52,7 +52,7 @@ class TestZfsNode(unittest2.TestCase):
         # should resume and succeed
         with OutputIO() as buf:
             with redirect_stdout(buf):
-                self.assertFalse(ZfsAutobackup("test test_target1 --verbose".split(" ")).run())
+                self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
             print(buf.getvalue())
 
@@ -82,7 +82,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
 
         # initial backup
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --allow-empty".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
 
         # incremental backup leaves resume token
         with patch('time.strftime', return_value="20101111000001"):
@@ -91,7 +91,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
         # --test should resume and succeed
         with OutputIO() as buf:
             with redirect_stdout(buf):
-                self.assertFalse(ZfsAutobackup("test test_target1 --verbose --test".split(" ")).run())
+                self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --test".split(" ")).run())
 
             print(buf.getvalue())
 
@@ -105,7 +105,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
         # should resume and succeed
         with OutputIO() as buf:
             with redirect_stdout(buf):
-                self.assertFalse(ZfsAutobackup("test test_target1 --verbose".split(" ")).run())
+                self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
             print(buf.getvalue())
 
@@ -149,11 +149,11 @@ test_target1/test_source2/fs2/sub@test-20101111000000
 
         # --test try again, should abort old resume
         with patch('time.strftime', return_value="20101111000001"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --test".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --test".split(" ")).run())
 
         # try again, should abort old resume
         with patch('time.strftime', return_value="20101111000001"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
         r = shelltest("zfs list -H -o name -r -t all test_target1")
         self.assertMultiLineEqual(r, """
@@ -177,7 +177,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
 
         # initial backup
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --allow-empty".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
 
         # icremental backup, leaves resume token
         with patch('time.strftime', return_value="20101111000001"):
@@ -188,11 +188,11 @@ test_target1/test_source2/fs2/sub@test-20101111000000
 
         # --test try again, should abort old resume
         with patch('time.strftime', return_value="20101111000002"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --test".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --test".split(" ")).run())
 
         # try again, should abort old resume
         with patch('time.strftime', return_value="20101111000002"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
         r = shelltest("zfs list -H -o name -r -t all test_target1")
         self.assertMultiLineEqual(r, """
@@ -216,7 +216,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
             self.skipTest("Resume not supported in this ZFS userspace version")
 
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
         # generate resume
         with patch('time.strftime', return_value="20101111000001"):
@@ -227,7 +227,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
                 # incremental, doesnt want previous anymore
                 with patch('time.strftime', return_value="20101111000002"):
                     self.assertFalse(ZfsAutobackup(
-                        "test test_target1 --verbose --keep-target=0 --debug --allow-empty".split(" ")).run())
+                        "test test_target1 --no-progress --verbose --keep-target=0 --debug --allow-empty".split(" ")).run())
 
             print(buf.getvalue())
 
@@ -250,17 +250,37 @@ test_target1/test_source2/fs2/sub@test-20101111000002
     def test_missing_common(self):
 
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --allow-empty".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
 
         # remove common snapshot and leave nothing
         shelltest("zfs release zfs_autobackup:test test_source1/fs1@test-20101111000000")
         shelltest("zfs destroy test_source1/fs1@test-20101111000000")
 
         with patch('time.strftime', return_value="20101111000001"):
-            self.assertTrue(ZfsAutobackup("test test_target1 --verbose --allow-empty".split(" ")).run())
+            self.assertTrue(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
 
-    ############# TODO:
+    #UPDATE: offcourse the one thing that wasn't tested had a bug :(  (in ExecuteNode.run()).
     def test_ignoretransfererrors(self):
 
-        self.skipTest(
-            "todo: create some kind of situation where zfs recv exits with an error but transfer is still ok (happens in practice with acltype)")
+            self.skipTest("Not sure how to implement a test for this without some serious hacking and patching.")
+
+#         #recreate target pool without any features
+#         # shelltest("zfs set compress=on test_source1; zpool destroy test_target1; zpool create test_target1 -o feature@project_quota=disabled /dev/ram2")
+#
+#         with patch('time.strftime', return_value="20101111000000"):
+#             self.assertFalse(ZfsAutobackup("test test_target1 --verbose --allow-empty --no-progress".split(" ")).run())
+#
+#         r = shelltest("zfs list -H -o name -r -t all test_target1")
+#
+#         self.assertMultiLineEqual(r, """
+# test_target1
+# test_target1/test_source1
+# test_target1/test_source1/fs1
+# test_target1/test_source1/fs1@test-20101111000002
+# test_target1/test_source1/fs1/sub
+# test_target1/test_source1/fs1/sub@test-20101111000002
+# test_target1/test_source2
+# test_target1/test_source2/fs2
+# test_target1/test_source2/fs2/sub
+# test_target1/test_source2/fs2/sub@test-20101111000002
+#         """)

tests/test_log.py

@@ -0,0 +1,52 @@
+import zfs_autobackup.LogConsole
+from basetest import *
+
+
+class TestLog(unittest2.TestCase):
+
+    def test_colored(self):
+        """test with color output"""
+        with OutputIO() as buf:
+            with redirect_stdout(buf):
+                l=LogConsole(show_verbose=False, show_debug=False, color=True)
+                l.verbose("verbose")
+                l.debug("debug")
+
+            with redirect_stdout(buf):
+                l=LogConsole(show_verbose=True, show_debug=True, color=True)
+                l.verbose("verbose")
+                l.debug("debug")
+
+            with redirect_stderr(buf):
+                l=LogConsole(show_verbose=False, show_debug=False, color=True)
+                l.error("error")
+
+            print(list(buf.getvalue()))
+            self.assertEqual(list(buf.getvalue()), ['\x1b', '[', '2', '2', 'm', ' ', ' ', 'v', 'e', 'r', 'b', 'o', 's', 'e', '\x1b', '[', '0', 'm', '\n', '\x1b', '[', '3', '2', 'm', '#', ' ', 'd', 'e', 'b', 'u', 'g', '\x1b', '[', '0', 'm', '\n', '\x1b', '[', '3', '1', 'm', '\x1b', '[', '1', 'm', '!', ' ', 'e', 'r', 'r', 'o', 'r', '\x1b', '[', '0', 'm', '\n'])
+
+    def test_nocolor(self):
+        """test without color output"""
+
+        with OutputIO() as buf:
+            with redirect_stdout(buf):
+                l=LogConsole(show_verbose=False, show_debug=False, color=False)
+                l.verbose("verbose")
+                l.debug("debug")
+
+            with redirect_stdout(buf):
+                l=LogConsole(show_verbose=True, show_debug=True, color=False)
+                l.verbose("verbose")
+                l.debug("debug")
+
+            with redirect_stderr(buf):
+                l=LogConsole(show_verbose=False, show_debug=False, color=False)
+                l.error("error")
+
+            print(list(buf.getvalue()))
+            self.assertEqual(list(buf.getvalue()), [' ', ' ', 'v', 'e', 'r', 'b', 'o', 's', 'e', '\n', '#', ' ', 'd', 'e', 'b', 'u', 'g', '\n', '!', ' ', 'e', 'r', 'r', 'o', 'r', '\n'])
+
+
+        zfs_autobackup.LogConsole.colorama=False
+
+
+

tests/test_scaling.py

@@ -34,7 +34,7 @@ class TestZfsScaling(unittest2.TestCase):
         with patch.object(ExecuteNode,'run', run_count) as p:
 
             with patch('time.strftime', return_value="20101112000000"):
-                self.assertFalse(ZfsAutobackup("test test_target1 --verbose --keep-source=10000 --keep-target=10000 --no-holds --allow-empty".split(" ")).run())
+                self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --keep-source=10000 --keep-target=10000 --no-holds --allow-empty".split(" ")).run())
 
 
             #this triggers if you make a change with an impact of more than O(snapshot_count/2)
@@ -47,7 +47,7 @@ class TestZfsScaling(unittest2.TestCase):
         with patch.object(ExecuteNode,'run', run_count) as p:
 
             with patch('time.strftime', return_value="20101112000001"):
-                self.assertFalse(ZfsAutobackup("test test_target1 --verbose --keep-source=10000 --keep-target=10000 --no-holds --allow-empty".split(" ")).run())
+                self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --keep-source=10000 --keep-target=10000 --no-holds --allow-empty".split(" ")).run())
 
 
             #this triggers if you make a change with a performance impact of more than O(snapshot_count/2)
@@ -69,11 +69,12 @@ class TestZfsScaling(unittest2.TestCase):
 
         global run_counter
 
+        #first run
         run_counter=0
         with patch.object(ExecuteNode,'run', run_count) as p:
 
             with patch('time.strftime', return_value="20101112000000"):
-                self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-holds --allow-empty".split(" ")).run())
+                self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-holds --allow-empty".split(" ")).run())
 
 
             #this triggers if you make a change with an impact of more than O(snapshot_count/2)
@@ -82,11 +83,12 @@ class TestZfsScaling(unittest2.TestCase):
             self.assertLess(abs(run_counter-expected_runs), dataset_count/2)
 
 
+        #second run, should have higher number of expected_runs
         run_counter=0
         with patch.object(ExecuteNode,'run', run_count) as p:
 
             with patch('time.strftime', return_value="20101112000001"):
-                self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-holds --allow-empty".split(" ")).run())
+                self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --no-holds --allow-empty".split(" ")).run())
 
 
             #this triggers if you make a change with a performance impact of more than O(snapshot_count/2)

tests/test_sendrecvpipes.py

@@ -0,0 +1,88 @@
+import zfs_autobackup.compressors
+from basetest import *
+import time
+
+class TestSendRecvPipes(unittest2.TestCase):
+    """test input/output pipes for zfs send and recv"""
+
+    def setUp(self):
+        prepare_zpools()
+        self.longMessage=True
+
+
+
+    def test_send_basics(self):
+        """send basics (remote/local send pipe)"""
+
+
+        with self.subTest("local local pipe"):
+            with patch('time.strftime', return_value="20101111000000"):
+                self.assertFalse(ZfsAutobackup(["test", "test_target1", "--exclude-received", "--no-holds", "--no-progress", "--send-pipe=dd bs=1M",  "--recv-pipe=dd bs=2M"]).run())
+
+            shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
+
+        with self.subTest("remote local pipe"):
+            with patch('time.strftime', return_value="20101111000000"):
+                self.assertFalse(ZfsAutobackup(["test", "test_target1", "--exclude-received", "--no-holds", "--no-progress", "--ssh-source=localhost", "--send-pipe=dd bs=1M",  "--recv-pipe=dd bs=2M"]).run())
+
+            shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
+
+        with self.subTest("local remote pipe"):
+            with patch('time.strftime', return_value="20101111000000"):
+                self.assertFalse(ZfsAutobackup(["test", "test_target1",  "--exclude-received", "--no-holds", "--no-progress", "--ssh-target=localhost", "--send-pipe=dd bs=1M",  "--recv-pipe=dd bs=2M"]).run())
+
+            shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
+
+        with self.subTest("remote remote pipe"):
+            with patch('time.strftime', return_value="20101111000000"):
+                self.assertFalse(ZfsAutobackup(["test", "test_target1",  "--exclude-received", "--no-holds", "--no-progress", "--ssh-source=localhost", "--ssh-target=localhost", "--send-pipe=dd bs=1M",  "--recv-pipe=dd bs=2M"]).run())
+
+    def test_compress(self):
+        """send basics (remote/local send pipe)"""
+
+        for compress in zfs_autobackup.compressors.COMPRESS_CMDS.keys():
+
+            with self.subTest("compress "+compress):
+                with patch('time.strftime', return_value="20101111000000"):
+                    self.assertFalse(ZfsAutobackup(["test", "test_target1", "--exclude-received", "--no-holds", "--no-progress", "--compress="+compress]).run())
+
+                shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
+
+    def test_buffer(self):
+        """test different buffer configurations"""
+
+
+        with self.subTest("local local pipe"):
+            with patch('time.strftime', return_value="20101111000000"):
+                self.assertFalse(ZfsAutobackup(["test", "test_target1", "--exclude-received", "--no-holds", "--no-progress", "--buffer=1M" ]).run())
+
+            shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
+
+        with self.subTest("remote local pipe"):
+            with patch('time.strftime', return_value="20101111000000"):
+                self.assertFalse(ZfsAutobackup(["test", "test_target1", "--exclude-received", "--no-holds", "--no-progress", "--ssh-source=localhost", "--buffer=1M"]).run())
+
+            shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
+
+        with self.subTest("local remote pipe"):
+            with patch('time.strftime', return_value="20101111000000"):
+                self.assertFalse(ZfsAutobackup(["test", "test_target1",  "--exclude-received", "--no-holds", "--no-progress", "--ssh-target=localhost", "--buffer=1M"]).run())
+
+            shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
+
+        with self.subTest("remote remote pipe"):
+            with patch('time.strftime', return_value="20101111000000"):
+                self.assertFalse(ZfsAutobackup(["test", "test_target1",  "--exclude-received", "--no-holds", "--no-progress", "--ssh-source=localhost", "--ssh-target=localhost", "--buffer=1M"]).run())
+
+    def test_rate(self):
+        """test rate limit"""
+
+
+        start=time.time()
+        with patch('time.strftime', return_value="20101111000000"):
+            self.assertFalse(ZfsAutobackup(["test", "test_target1", "--exclude-received", "--no-holds", "--no-progress", "--rate=50k" ]).run())
+
+        #not a great way of verifying but it works.
+        self.assertGreater(time.time()-start, 5)
+
+

tests/test_thinner.py

@@ -3,7 +3,7 @@ import pprint
 
 from zfs_autobackup.Thinner import Thinner
 
-#randint is different in python 2 vs 3
+# randint is different in python 2 vs 3
 randint_compat = lambda lo, hi: lo + int(random.random() * (hi + 1 - lo))
 
 
@@ -23,6 +23,23 @@ class TestThinner(unittest2.TestCase):
 
         # return super().setUp()
 
+    def test_exceptions(self):
+        with self.assertRaisesRegexp(Exception, "^Invalid period"):
+            ThinnerRule("12X12m")
+
+        with self.assertRaisesRegexp(Exception, "^Invalid ttl"):
+            ThinnerRule("12d12X")
+
+        with self.assertRaisesRegexp(Exception, "^Period cant be"):
+            ThinnerRule("12d1d")
+
+        with self.assertRaisesRegexp(Exception, "^Invalid schedule"):
+            ThinnerRule("XXX")
+
+        with self.assertRaisesRegexp(Exception, "^Number of"):
+            Thinner("-1")
+
+
     def test_incremental(self):
         ok=['2023-01-03 10:53:16',
             '2024-01-02 15:43:29',
@@ -138,5 +155,5 @@ class TestThinner(unittest2.TestCase):
         self.assertEqual(result, ok)
 
 
-if __name__ == '__main__':
-    unittest.main()
+# if __name__ == '__main__':
+#     unittest.main()

tests/test_zfsautobackup.py

@@ -1,8 +1,9 @@
+from zfs_autobackup.CmdPipe import CmdPipe
+
 from basetest import *
 import time
 
 
-
 class TestZfsAutobackup(unittest2.TestCase):
 
     def setUp(self):
@@ -11,13 +12,29 @@ class TestZfsAutobackup(unittest2.TestCase):
 
     def test_invalidpars(self):
 
-        self.assertEqual(ZfsAutobackup("test test_target1 --keep-source -1".split(" ")).run(), 255)
+        self.assertEqual(ZfsAutobackup("test test_target1 --no-progress --keep-source -1".split(" ")).run(), 255)
+
+        with OutputIO() as buf:
+            with redirect_stdout(buf):
+                self.assertEqual(ZfsAutobackup("test test_target1 --no-progress --resume --verbose --no-snapshot".split(" ")).run(), 0)
+
+            print(buf.getvalue())
+            self.assertIn("The --resume", buf.getvalue())
+
+        with OutputIO() as buf:
+            with redirect_stderr(buf):
+                self.assertEqual(ZfsAutobackup("test test_target_nonexisting --no-progress".split(" ")).run(), 255)
+
+            print(buf.getvalue())
+            # correct message?
+            self.assertIn("Please create this dataset", buf.getvalue())
+
 
     def  test_snapshotmode(self):
         """test snapshot tool mode"""
 
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test --verbose".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test --no-progress --verbose".split(" ")).run())
 
         r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
         self.assertMultiLineEqual(r,"""
@@ -35,15 +52,13 @@ test_source2/fs3/sub
 test_target1
 """)
 
-
-
     def  test_defaults(self):
 
         with self.subTest("no datasets selected"):
             with OutputIO() as buf:
                 with redirect_stderr(buf):
                     with patch('time.strftime', return_value="20101111000000"):
-                        self.assertTrue(ZfsAutobackup("nonexisting test_target1 --verbose --debug".split(" ")).run())
+                        self.assertTrue(ZfsAutobackup("nonexisting test_target1 --verbose --debug --no-progress".split(" ")).run())
 
                 print(buf.getvalue())
                 #correct message?
@@ -53,7 +68,7 @@ test_target1
         with self.subTest("defaults with full verbose and debug"):
 
             with patch('time.strftime', return_value="20101111000000"):
-                self.assertFalse(ZfsAutobackup("test test_target1 --verbose --debug".split(" ")).run())
+                self.assertFalse(ZfsAutobackup("test test_target1 --verbose --debug --no-progress".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
             self.assertMultiLineEqual(r,"""
@@ -82,7 +97,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
 
         with self.subTest("bare defaults, allow empty"):
             with patch('time.strftime', return_value="20101111000001"):
-                self.assertFalse(ZfsAutobackup("test test_target1 --allow-empty".split(" ")).run())
+                self.assertFalse(ZfsAutobackup("test test_target1 --allow-empty --no-progress".split(" ")).run())
 
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -153,14 +168,14 @@ test_target1/test_source2/fs2/sub@test-20101111000001  userrefs  1         -
         #make sure time handling is correctly. try to make snapshots a year appart and verify that only snapshots mostly 1y old are kept
         with self.subTest("test time checking"):
             with patch('time.strftime', return_value="20111111000000"):
-                self.assertFalse(ZfsAutobackup("test test_target1 --allow-empty --verbose".split(" ")).run())
+                self.assertFalse(ZfsAutobackup("test test_target1 --allow-empty --verbose --no-progress".split(" ")).run())
 
 
             time_str="20111112000000" #month in the "future"
             future_timestamp=time_secs=time.mktime(time.strptime(time_str,"%Y%m%d%H%M%S"))
             with patch('time.time', return_value=future_timestamp):
                 with patch('time.strftime', return_value="20111111000001"):
-                    self.assertFalse(ZfsAutobackup("test test_target1 --allow-empty --verbose --keep-source 1y1y --keep-target 1d1y".split(" ")).run())
+                    self.assertFalse(ZfsAutobackup("test test_target1 --allow-empty --verbose --keep-source 1y1y --keep-target 1d1y --no-progress".split(" ")).run())
 
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -194,14 +209,13 @@ test_target1/test_source2/fs2/sub@test-20111111000000
 test_target1/test_source2/fs2/sub@test-20111111000001
 """)
 
-
     def  test_ignore_othersnaphots(self):
 
         r=shelltest("zfs snapshot test_source1/fs1@othersimple")
         r=shelltest("zfs snapshot test_source1/fs1@otherdate-20001111000000")
 
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
             self.assertMultiLineEqual(r,"""
@@ -236,7 +250,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
         r=shelltest("zfs snapshot test_source1/fs1@otherdate-20001111000000")
 
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --other-snapshots".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --other-snapshots".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
             self.assertMultiLineEqual(r,"""
@@ -271,7 +285,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
     def  test_nosnapshot(self):
 
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-snapshot".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-snapshot --no-progress".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
             #(only parents are created )
@@ -295,7 +309,7 @@ test_target1/test_source2/fs2
     def  test_nosend(self):
 
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-send".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-send --no-progress".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
             #(only parents are created )
@@ -320,7 +334,7 @@ test_target1
         r=shelltest("zfs snapshot test_source1/fs1@otherreplication")
 
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --ignore-replicated".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --ignore-replicated".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
             #(only parents are created )
@@ -351,7 +365,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
     def  test_noholds(self):
 
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-holds".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --no-holds --no-progress".split(" ")).run())
 
             r=shelltest("zfs get -r userrefs test_source1 test_source2 test_target1")
             self.assertMultiLineEqual(r,"""
@@ -383,7 +397,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000  userrefs  0         -
     def  test_strippath(self):
 
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --strip-path=1".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --strip-path=1 --no-progress".split(" ")).run())
 
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
             self.assertMultiLineEqual(r,"""
@@ -419,7 +433,7 @@ test_target1/fs2/sub@test-20101111000000
         r=shelltest("zfs set refreservation=1M test_source1/fs1")
 
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --clear-refreservation".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --clear-refreservation".split(" ")).run())
 
             r=shelltest("zfs get refreservation -r test_source1 test_source2 test_target1")
             self.assertMultiLineEqual(r,"""
@@ -457,7 +471,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000  refreservation  -
 
 
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --clear-mountpoint --debug".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --clear-mountpoint --debug".split(" ")).run())
 
             r=shelltest("zfs get canmount -r test_source1 test_source2 test_target1")
             self.assertMultiLineEqual(r,"""
@@ -490,7 +504,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000  canmount  -         -
 
         #initial backup
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
         #make change
         r=shelltest("zfs mount test_target1/test_source1/fs1")
@@ -498,18 +512,18 @@ test_target1/test_source2/fs2/sub@test-20101111000000  canmount  -         -
 
         with patch('time.strftime', return_value="20101111000001"):
             #should fail (busy)
-            self.assertTrue(ZfsAutobackup("test test_target1 --verbose --allow-empty".split(" ")).run())
+            self.assertTrue(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
 
         with patch('time.strftime', return_value="20101111000002"):
             #rollback, should succeed
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --allow-empty --rollback".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --rollback".split(" ")).run())
 
 
     def  test_destroyincompat(self):
 
         #initial backup
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
         #add multiple compatible snapshot (written is still 0)
         r=shelltest("zfs snapshot test_target1/test_source1/fs1@compatible1")
@@ -517,7 +531,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000  canmount  -         -
 
         with patch('time.strftime', return_value="20101111000001"):
             #should be ok, is compatible
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --allow-empty".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
 
         #add incompatible snapshot by changing and snapshotting
         r=shelltest("zfs mount test_target1/test_source1/fs1")
@@ -527,20 +541,44 @@ test_target1/test_source2/fs2/sub@test-20101111000000  canmount  -         -
 
         with patch('time.strftime', return_value="20101111000002"):
             #--test should fail, now incompatible
-            self.assertTrue(ZfsAutobackup("test test_target1 --verbose --allow-empty --test".split(" ")).run())
+            self.assertTrue(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --test".split(" ")).run())
 
         with patch('time.strftime', return_value="20101111000002"):
             #should fail, now incompatible
-            self.assertTrue(ZfsAutobackup("test test_target1 --verbose --allow-empty".split(" ")).run())
+            self.assertTrue(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
 
         with patch('time.strftime', return_value="20101111000003"):
             #--test should succeed by destroying incompatibles
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --allow-empty --destroy-incompatible --test".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --destroy-incompatible --test".split(" ")).run())
 
         with patch('time.strftime', return_value="20101111000003"):
             #should succeed by destroying incompatibles
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --allow-empty --destroy-incompatible".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --destroy-incompatible".split(" ")).run())
 
+        r = shelltest("zfs list -H -o name -r -t all test_target1")
+        self.assertMultiLineEqual(r, """
+test_target1
+test_target1/test_source1
+test_target1/test_source1/fs1
+test_target1/test_source1/fs1@test-20101111000000
+test_target1/test_source1/fs1@compatible1
+test_target1/test_source1/fs1@compatible2
+test_target1/test_source1/fs1@test-20101111000001
+test_target1/test_source1/fs1@test-20101111000002
+test_target1/test_source1/fs1@test-20101111000003
+test_target1/test_source1/fs1/sub
+test_target1/test_source1/fs1/sub@test-20101111000000
+test_target1/test_source1/fs1/sub@test-20101111000001
+test_target1/test_source1/fs1/sub@test-20101111000002
+test_target1/test_source1/fs1/sub@test-20101111000003
+test_target1/test_source2
+test_target1/test_source2/fs2
+test_target1/test_source2/fs2/sub
+test_target1/test_source2/fs2/sub@test-20101111000000
+test_target1/test_source2/fs2/sub@test-20101111000001
+test_target1/test_source2/fs2/sub@test-20101111000002
+test_target1/test_source2/fs2/sub@test-20101111000003
+""")
 
 
 
@@ -552,13 +590,13 @@ test_target1/test_source2/fs2/sub@test-20101111000000  canmount  -         -
         #test all ssh directions
 
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --allow-empty --ssh-source localhost".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --ssh-source localhost --exclude-received".split(" ")).run())
 
         with patch('time.strftime', return_value="20101111000001"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --allow-empty --ssh-target localhost".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --ssh-target localhost --exclude-received".split(" ")).run())
 
         with patch('time.strftime', return_value="20101111000002"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --allow-empty --ssh-source localhost --ssh-target localhost".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --ssh-source localhost --ssh-target localhost".split(" ")).run())
 
 
         r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
@@ -603,7 +641,7 @@ test_target1/test_source2/fs2/sub@test-20101111000002
 
         #initial
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --min-change 100000".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --min-change 100000".split(" ")).run())
 
         #make small change, use umount to reflect the changes immediately
         r=shelltest("zfs set compress=off test_source1")
@@ -613,7 +651,7 @@ test_target1/test_source2/fs2/sub@test-20101111000002
 
         #too small change, takes no snapshots
         with patch('time.strftime', return_value="20101111000001"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --min-change 100000".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --min-change 100000".split(" ")).run())
 
         #make big change
         r=shelltest("dd if=/dev/zero of=/test_source1/fs1/change.txt bs=200000 count=1")
@@ -621,7 +659,7 @@ test_target1/test_source2/fs2/sub@test-20101111000002
 
         #bigger change, should take snapshot
         with patch('time.strftime', return_value="20101111000002"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --min-change 100000".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --min-change 100000".split(" ")).run())
 
         r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
         self.assertMultiLineEqual(r,"""
@@ -654,7 +692,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
 
         #initial
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --test".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --test".split(" ")).run())
 
         r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
         self.assertMultiLineEqual(r,"""
@@ -671,12 +709,12 @@ test_target1
 
         #actual make initial backup
         with patch('time.strftime', return_value="20101111000001"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
 
         #test incremental
-        with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --test".split(" ")).run())
+        with patch('time.strftime', return_value="20101111000002"):
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --allow-empty --verbose --test".split(" ")).run())
 
         r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
         self.assertMultiLineEqual(r,"""
@@ -712,7 +750,7 @@ test_target1/test_source2/fs2/sub@test-20101111000001
         shelltest("zfs send  test_source1/fs1@migrate1| zfs recv test_target1/test_source1/fs1")
 
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose".split(" ")).run())
 
         r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
         self.assertMultiLineEqual(r,"""
@@ -745,15 +783,15 @@ test_target1/test_source2/fs2/sub@test-20101111000000
         """test if keep-source=0 and keep-target=0 dont delete common snapshot and break backup"""
 
         with patch('time.strftime', return_value="20101111000000"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --keep-source=0 --keep-target=0".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --keep-source=0 --keep-target=0".split(" ")).run())
 
         #make snapshot, shouldnt delete 0
         with patch('time.strftime', return_value="20101111000001"):
-            self.assertFalse(ZfsAutobackup("test --verbose --keep-source=0 --keep-target=0 --allow-empty".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test --no-progress --verbose --keep-source=0 --keep-target=0 --allow-empty".split(" ")).run())
 
         #make snapshot 2, shouldnt delete 0 since it has holds, but will delete 1 since it has no holds
         with patch('time.strftime', return_value="20101111000002"):
-            self.assertFalse(ZfsAutobackup("test --verbose --keep-source=0 --keep-target=0 --allow-empty".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test --no-progress --verbose --keep-source=0 --keep-target=0 --allow-empty".split(" ")).run())
 
         r = shelltest("zfs list -H -o name -r -t all " + TEST_POOLS)
         self.assertMultiLineEqual(r, """
@@ -785,7 +823,7 @@ test_target1/test_source2/fs2/sub@test-20101111000000
 
         #make another backup but with no-holds. we should naturally endup with only number 3
         with patch('time.strftime', return_value="20101111000003"):
-            self.assertFalse(ZfsAutobackup("test test_target1 --verbose --keep-source=0 --keep-target=0 --no-holds --allow-empty".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --keep-source=0 --keep-target=0 --no-holds --allow-empty".split(" ")).run())
 
         r = shelltest("zfs list -H -o name -r -t all " + TEST_POOLS)
         self.assertMultiLineEqual(r, """
@@ -815,7 +853,7 @@ test_target1/test_source2/fs2/sub@test-20101111000003
 
         # make snapshot 4, since we used no-holds, it will delete 3 on the source, breaking the backup
         with patch('time.strftime', return_value="20101111000004"):
-            self.assertFalse(ZfsAutobackup("test --verbose --keep-source=0 --keep-target=0 --allow-empty".split(" ")).run())
+            self.assertFalse(ZfsAutobackup("test --no-progress --verbose --keep-source=0 --keep-target=0 --allow-empty".split(" ")).run())
 
         r = shelltest("zfs list -H -o name -r -t all " + TEST_POOLS)
         self.assertMultiLineEqual(r, """
@@ -842,9 +880,26 @@ test_target1/test_source2/fs2/sub
 test_target1/test_source2/fs2/sub@test-20101111000003
 """)
 
-    ###########################
-# TODO:
 
-    def  test_raw(self):
+    def test_progress(self):
 
-        self.skipTest("todo: later when travis supports zfs 0.8")
+        r=shelltest("dd if=/dev/zero of=/test_source1/data.txt bs=200000 count=1")
+        r = shelltest("zfs snapshot test_source1@test")
+
+        l=LogConsole(show_verbose=True, show_debug=False, color=False)
+        n=ZfsNode("test",l)
+        d=ZfsDataset(n,"test_source1@test")
+
+        sp=d.send_pipe([], prev_snapshot=None, resume_token=None, show_progress=True, raw=False, send_pipes=[], send_properties=True, write_embedded=True)
+
+
+        with OutputIO() as buf:
+            with redirect_stderr(buf):
+                try:
+                    n.run(["sleep", "2"], inp=sp)
+                except:
+                    pass
+
+            print(buf.getvalue())
+            # correct message?
+            self.assertRegex(buf.getvalue(),".*>>> .*minutes left.*")

tests/test_zfsautobackup31.py

@@ -0,0 +1,74 @@
+from basetest import *
+import time
+
+class TestZfsAutobackup31(unittest2.TestCase):
+    """various new 3.1 features"""
+
+    def setUp(self):
+        prepare_zpools()
+        self.longMessage=True
+
+    def test_no_thinning(self):
+
+        with patch('time.strftime', return_value="20101111000000"):
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty".split(" ")).run())
+
+        with patch('time.strftime', return_value="20101111000001"):
+            self.assertFalse(ZfsAutobackup("test test_target1 --no-progress --verbose --allow-empty --keep-target=0 --keep-source=0 --no-thinning".split(" ")).run())
+
+            r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
+            self.assertMultiLineEqual(r,"""
+test_source1
+test_source1/fs1
+test_source1/fs1@test-20101111000000
+test_source1/fs1@test-20101111000001
+test_source1/fs1/sub
+test_source1/fs1/sub@test-20101111000000
+test_source1/fs1/sub@test-20101111000001
+test_source2
+test_source2/fs2
+test_source2/fs2/sub
+test_source2/fs2/sub@test-20101111000000
+test_source2/fs2/sub@test-20101111000001
+test_source2/fs3
+test_source2/fs3/sub
+test_target1
+test_target1/test_source1
+test_target1/test_source1/fs1
+test_target1/test_source1/fs1@test-20101111000000
+test_target1/test_source1/fs1@test-20101111000001
+test_target1/test_source1/fs1/sub
+test_target1/test_source1/fs1/sub@test-20101111000000
+test_target1/test_source1/fs1/sub@test-20101111000001
+test_target1/test_source2
+test_target1/test_source2/fs2
+test_target1/test_source2/fs2/sub
+test_target1/test_source2/fs2/sub@test-20101111000000
+test_target1/test_source2/fs2/sub@test-20101111000001
+""")
+
+
+    def test_re_replication(self):
+        """test re-replication of something thats already a backup (new in v3.1-beta5)"""
+
+        shelltest("zfs create test_target1/a")
+        shelltest("zfs create test_target1/b")
+
+        with patch('time.strftime', return_value="20101111000000"):
+            self.assertFalse(ZfsAutobackup("test test_target1/a --no-progress --verbose --debug".split(" ")).run())
+
+        with patch('time.strftime', return_value="20101111000001"):
+            self.assertFalse(ZfsAutobackup("test test_target1/b --no-progress --verbose".split(" ")).run())
+
+            r=shelltest("zfs list -H -o name -r -t snapshot test_target1")
+            #NOTE: it wont backup test_target1/a/test_source2/fs2/sub to test_target1/b since it doesnt have the zfs_autobackup property anymore.
+            self.assertMultiLineEqual(r,"""
+test_target1/a/test_source1/fs1@test-20101111000000
+test_target1/a/test_source1/fs1/sub@test-20101111000000
+test_target1/a/test_source2/fs2/sub@test-20101111000000
+test_target1/b/test_source1/fs1@test-20101111000000
+test_target1/b/test_source1/fs1/sub@test-20101111000000
+test_target1/b/test_source2/fs2/sub@test-20101111000000
+test_target1/b/test_target1/a/test_source1/fs1@test-20101111000000
+test_target1/b/test_target1/a/test_source1/fs1/sub@test-20101111000000
+""")

tests/test_zfsnode.py

@@ -16,7 +16,7 @@ class TestZfsNode(unittest2.TestCase):
         node=ZfsNode("test", logger, description=description)
 
         with self.subTest("first snapshot"):
-            node.consistent_snapshot(node.selected_datasets, "test-1",100000)
+            node.consistent_snapshot(node.selected_datasets(exclude_paths=[], exclude_received=False), "test-1",100000)
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
             self.assertEqual(r,"""
 test_source1
@@ -35,7 +35,7 @@ test_target1
 
 
         with self.subTest("second snapshot, no changes, no snapshot"):
-            node.consistent_snapshot(node.selected_datasets, "test-2",1)
+            node.consistent_snapshot(node.selected_datasets(exclude_paths=[], exclude_received=False), "test-2",1)
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
             self.assertEqual(r,"""
 test_source1
@@ -53,7 +53,7 @@ test_target1
 """)
 
         with self.subTest("second snapshot, no changes, empty snapshot"):
-            node.consistent_snapshot(node.selected_datasets, "test-2",0)
+            node.consistent_snapshot(node.selected_datasets(exclude_paths=[], exclude_received=False), "test-2",0)
             r=shelltest("zfs list -H -o name -r -t all "+TEST_POOLS)
             self.assertEqual(r,"""
 test_source1
@@ -78,7 +78,7 @@ test_target1
         logger=LogStub()
         description="[Source]"
         node=ZfsNode("test", logger, description=description)
-        s=pformat(node.selected_datasets)
+        s=pformat(node.selected_datasets(exclude_paths=[], exclude_received=False))
         print(s)
 
         #basics
@@ -115,7 +115,7 @@ test_target1
     def test_supportedrecvoptions(self):
         logger=LogStub()
         description="[Source]"
-        #NOTE: this couldnt hang via ssh if we dont close filehandles properly. (which was a previous bug)
+        #NOTE: this could hang via ssh if we dont close filehandles properly. (which was a previous bug)
         node=ZfsNode("test", logger, description=description, ssh_to='localhost')
         self.assertIsInstance(node.supported_recv_options, list)
 

zfs_autobackup/CmdPipe.py

@@ -0,0 +1,160 @@
+import subprocess
+import os
+import select
+
+try:
+    from shlex import quote as cmd_quote
+except ImportError:
+    from pipes import quote as cmd_quote
+
+
+class CmdItem:
+    """one command item, to be added to a CmdPipe"""
+
+    def __init__(self, cmd, readonly=False, stderr_handler=None, exit_handler=None, shell=False):
+        """create item. caller has to make sure cmd is properly escaped when using shell.
+        :type cmd: list of str
+        """
+
+        self.cmd = cmd
+        self.readonly = readonly
+        self.stderr_handler = stderr_handler
+        self.exit_handler = exit_handler
+        self.shell = shell
+        self.process = None
+
+    def __str__(self):
+        """return copy-pastable version of command."""
+        if self.shell:
+            # its already copy pastable for a shell:
+            return " ".join(self.cmd)
+        else:
+            # make it copy-pastable, will make a mess of quotes sometimes, but is correct
+            return " ".join(map(cmd_quote, self.cmd))
+
+    def create(self, stdin):
+        """actually create the subprocess (called by CmdPipe)"""
+
+        # make sure the command gets all the data in utf8 format:
+        # (this is necessary if LC_ALL=en_US.utf8 is not set in the environment)
+        encoded_cmd = []
+        for arg in self.cmd:
+            encoded_cmd.append(arg.encode('utf-8'))
+
+        self.process = subprocess.Popen(encoded_cmd, env=os.environ, stdout=subprocess.PIPE, stdin=stdin,
+                                        stderr=subprocess.PIPE, shell=self.shell)
+
+
+class CmdPipe:
+    """a pipe of one or more commands. also takes care of utf-8 encoding/decoding and line based parsing"""
+
+    def __init__(self, readonly=False, inp=None):
+        """
+        :param inp: input string for stdin
+        :param readonly: Only execute if entire pipe consist of readonly commands
+        """
+        # list of commands + error handlers to execute
+        self.items = []
+
+        self.inp = inp
+        self.readonly = readonly
+        self._should_execute = True
+
+    def add(self, cmd_item):
+        """adds a CmdItem to pipe.
+        :type cmd_item: CmdItem
+        """
+
+        self.items.append(cmd_item)
+
+        if not cmd_item.readonly and self.readonly:
+            self._should_execute = False
+
+    def __str__(self):
+        """transform whole pipe into oneliner for debugging and testing. this should generate a copy-pastable string for in a console """
+
+        ret = ""
+        for item in self.items:
+            if ret:
+                ret = ret + " | "
+            ret = ret + "({})".format(item)  # this will do proper escaping to make it copypastable
+
+        return ret
+
+    def should_execute(self):
+        return self._should_execute
+
+    def execute(self, stdout_handler):
+        """run the pipe. returns True all exit handlers returned true"""
+
+        if not self._should_execute:
+            return True
+
+        # first process should have actual user input as stdin:
+        selectors = []
+
+        # create processes
+        last_stdout = None
+        stdin = subprocess.PIPE
+        for item in self.items:
+
+            item.create(stdin)
+            selectors.append(item.process.stderr)
+
+            if last_stdout is None:
+                # we're the first process in the pipe, do we have some input?
+                if self.inp is not None:
+                    # TODO: make streaming to support big inputs?
+                    item.process.stdin.write(self.inp.encode('utf-8'))
+                item.process.stdin.close()
+            else:
+                # last stdout was piped to this stdin already, so close it because we dont need it anymore
+                last_stdout.close()
+
+            last_stdout = item.process.stdout
+            stdin = last_stdout
+
+        # monitor last stdout as well
+        selectors.append(last_stdout)
+
+        while True:
+            # wait for output on one of the stderrs or last_stdout
+            (read_ready, write_ready, ex_ready) = select.select(selectors, [], [])
+            eof_count = 0
+            done_count = 0
+
+            # read line and call appropriate handlers
+            if last_stdout in read_ready:
+                line = last_stdout.readline().decode('utf-8').rstrip()
+                if line != "":
+                    stdout_handler(line)
+                else:
+                    eof_count = eof_count + 1
+
+            for item in self.items:
+                if item.process.stderr in read_ready:
+                    line = item.process.stderr.readline().decode('utf-8').rstrip()
+                    if line != "":
+                        item.stderr_handler(line)
+                    else:
+                        eof_count = eof_count + 1
+
+                if item.process.poll() is not None:
+                    done_count = done_count + 1
+
+            # all filehandles are eof and all processes are done (poll() is not None)
+            if eof_count == len(selectors) and done_count == len(self.items):
+                break
+
+        # close filehandles
+        last_stdout.close()
+        for item in self.items:
+            item.process.stderr.close()
+
+        # call exit handlers
+        success = True
+        for item in self.items:
+            if item.exit_handler is not None:
+                success=item.exit_handler(item.process.returncode) and success
+
+        return success

zfs_autobackup/ExecuteNode.py

@@ -1,12 +1,24 @@
 import os
 import select
 import subprocess
-
+from zfs_autobackup.CmdPipe import CmdPipe, CmdItem
 from zfs_autobackup.LogStub import LogStub
 
+try:
+    from shlex import quote as cmd_quote
+except ImportError:
+    from pipes import quote as cmd_quote
+
+
+class ExecuteError(Exception):
+    pass
+
+
 class ExecuteNode(LogStub):
     """an endpoint to execute local or remote commands via ssh"""
 
+    PIPE=1
+
     def __init__(self, ssh_config=None, ssh_to=None, readonly=False, debug_output=False):
         """ssh_config: custom ssh config
            ssh_to: server you want to ssh to. none means local
@@ -37,163 +49,113 @@ class ExecuteNode(LogStub):
         else:
             self.error("STDERR > " + line.rstrip())
 
-    def _parse_stderr_pipe(self, line, hide_errors):
-        """parse stderr from pipe input process. can be overridden in subclass"""
-        if hide_errors:
-            self.debug("STDERR|> " + line.rstrip())
+    def _quote(self, cmd):
+        """return quoted version of command. if it has value PIPE it will add an actual | """
+        if cmd==self.PIPE:
+            return('|')
         else:
-            self.error("STDERR|> " + line.rstrip())
+            return(cmd_quote(cmd))
 
-    def run(self, cmd, inp=None, tab_split=False, valid_exitcodes=None, readonly=False, hide_errors=False, pipe=False,
-            return_stderr=False):
-        """run a command on the node cmd: the actual command, should be a list, where the first item is the command
-        and the rest are parameters. input: Can be None, a string or a pipe-handle you got from another run()
-        tab_split: split tabbed files in output into a list valid_exitcodes: list of valid exit codes for this
-        command (checks exit code of both sides of a pipe) readonly: make this True if the command doesn't make any
-        changes and is safe to execute in testmode hide_errors: don't show stderr output as error, instead show it as
-        debugging output (use to hide expected errors) pipe: Instead of executing, return a pipe-handle to be used to
-        input to another run() command. (just like a | in linux) return_stderr: return both stdout and stderr as a
-        tuple. (only returns stderr from this side of the pipe)
-        """
+    def _shell_cmd(self, cmd):
+        """prefix specified ssh shell to command and escape shell characters"""
 
-        if not valid_exitcodes:
-            valid_exitcodes = [0]
+        ret=[]
 
-        encoded_cmd = []
-
-        # use ssh?
-        if self.ssh_to is not None:
-            encoded_cmd.append("ssh".encode('utf-8'))
+        #add remote shell
+        if not self.is_local():
+            ret=["ssh"]
 
             if self.ssh_config is not None:
-                encoded_cmd.extend(["-F".encode('utf-8'), self.ssh_config.encode('utf-8')])
+                ret.extend(["-F", self.ssh_config])
 
-            encoded_cmd.append(self.ssh_to.encode('utf-8'))
+            ret.append(self.ssh_to)
 
-            # make sure the command gets all the data in utf8 format:
-            # (this is necessary if LC_ALL=en_US.utf8 is not set in the environment)
-            for arg in cmd:
-                # add single quotes for remote commands to support spaces and other weird stuff (remote commands are
-                # executed in a shell) and escape existing single quotes (bash needs ' to end the quoted string,
-                # then a \' for the actual quote and then another ' to start a new quoted string) (and then python
-                # needs the double \ to get a single \)
-                encoded_cmd.append(("'" + arg.replace("'", "'\\''") + "'").encode('utf-8'))
+        ret.append(" ".join(map(self._quote, cmd)))
 
+        return ret
+
+    def is_local(self):
+        return self.ssh_to is None
+
+    def run(self, cmd, inp=None, tab_split=False, valid_exitcodes=None, readonly=False, hide_errors=False,
+            return_stderr=False, pipe=False):
+        """run a command on the node , checks output and parses/handle output and returns it
+
+        Either uses a local shell (sh -c) or remote shell (ssh) to execute the command. Therefore the command can have stuff like actual pipes in it, if you dont want to use pipe=True to pipe stuff.
+
+        :param cmd: the actual command, should be a list, where the first item is the command
+                    and the rest are parameters. use ExecuteNode.PIPE to add an unescaped |
+                    (if you want to use system piping instead of python piping)
+        :param pipe: return CmdPipe instead of executing it.
+        :param inp: Can be None, a string or a CmdPipe that was previously returned.
+        :param tab_split: split tabbed files in output into a list
+        :param valid_exitcodes: list of valid exit codes for this command (checks exit code of both sides of a pipe)
+                                Use [] to accept all exit codes. Default [0]
+        :param readonly: make this True if the command doesn't make any changes and is safe to execute in testmode
+        :param hide_errors: don't show stderr output as error, instead show it as debugging output (use to hide expected errors)
+        :param return_stderr: return both stdout and stderr as a tuple. (normally only returns stdout)
+
+        """
+
+        # create new pipe?
+        if not isinstance(inp, CmdPipe):
+            cmd_pipe = CmdPipe(self.readonly, inp)
         else:
-            for arg in cmd:
-                encoded_cmd.append(arg.encode('utf-8'))
+            # add stuff to existing pipe
+            cmd_pipe = inp
 
-        # debug and test stuff
-        debug_txt = ""
-        for c in encoded_cmd:
-            debug_txt = debug_txt + " " + c.decode()
-
-        if pipe:
-            debug_txt = debug_txt + " |"
-
-        if self.readonly and not readonly:
-            self.debug("SKIP   > " + debug_txt)
-        else:
-            if pipe:
-                self.debug("PIPE   > " + debug_txt)
-            else:
-                self.debug("RUN    > " + debug_txt)
-
-        # determine stdin
-        if inp is None:
-            # NOTE: Not None, otherwise it reads stdin from terminal!
-            stdin = subprocess.PIPE
-        elif isinstance(inp, str) or type(inp) == 'unicode':
-            self.debug("INPUT  > \n" + inp.rstrip())
-            stdin = subprocess.PIPE
-        elif isinstance(inp, subprocess.Popen):
-            self.debug("Piping input")
-            stdin = inp.stdout
-        else:
-            raise (Exception("Program error: Incompatible input"))
-
-        if self.readonly and not readonly:
-            # todo: what happens if input is piped?
-            return
-
-        # execute and parse/return results
-        p = subprocess.Popen(encoded_cmd, env=os.environ, stdout=subprocess.PIPE, stdin=stdin, stderr=subprocess.PIPE)
-
-        # Note: make streaming?
-        if isinstance(inp, str) or type(inp) == 'unicode':
-            p.stdin.write(inp.encode('utf-8'))
-
-        if p.stdin:
-            p.stdin.close()
-
-        # return pipe
-        if pipe:
-            return p
-
-        # handle all outputs
-        if isinstance(inp, subprocess.Popen):
-            selectors = [p.stdout, p.stderr, inp.stderr]
-            inp.stdout.close()  # otherwise inputprocess wont exit when ours does
-        else:
-            selectors = [p.stdout, p.stderr]
-
-        output_lines = []
+        # stderr parser
         error_lines = []
-        while True:
-            (read_ready, write_ready, ex_ready) = select.select(selectors, [], [])
-            eof_count = 0
-            if p.stdout in read_ready:
-                line = p.stdout.readline().decode('utf-8')
-                if line != "":
-                    if tab_split:
-                        output_lines.append(line.rstrip().split('\t'))
-                    else:
-                        output_lines.append(line.rstrip())
-                    self._parse_stdout(line)
-                else:
-                    eof_count = eof_count + 1
-            if p.stderr in read_ready:
-                line = p.stderr.readline().decode('utf-8')
-                if line != "":
-                    if tab_split:
-                        error_lines.append(line.rstrip().split('\t'))
-                    else:
-                        error_lines.append(line.rstrip())
-                    self._parse_stderr(line, hide_errors)
-                else:
-                    eof_count = eof_count + 1
-            if isinstance(inp, subprocess.Popen) and (inp.stderr in read_ready):
-                line = inp.stderr.readline().decode('utf-8')
-                if line != "":
-                    self._parse_stderr_pipe(line, hide_errors)
-                else:
-                    eof_count = eof_count + 1
 
-            # stop if both processes are done and all filehandles are EOF:
-            if (p.poll() is not None) and (
-                    (not isinstance(inp, subprocess.Popen)) or inp.poll() is not None) and eof_count == len(selectors):
-                break
+        def stderr_handler(line):
+            if tab_split:
+                error_lines.append(line.rstrip().split('\t'))
+            else:
+                error_lines.append(line.rstrip())
+            self._parse_stderr(line, hide_errors)
 
-        p.stderr.close()
-        p.stdout.close()
-
-        if self.debug_output:
-            self.debug("EXIT   > {}".format(p.returncode))
-
-        # handle piped process error output and exit codes
-        if isinstance(inp, subprocess.Popen):
-            inp.stderr.close()
-            inp.stdout.close()
+        # exit code hanlder
+        if valid_exitcodes is None:
+            valid_exitcodes = [0]
 
+        def exit_handler(exit_code):
             if self.debug_output:
-                self.debug("EXIT  |> {}".format(inp.returncode))
-            if valid_exitcodes and inp.returncode not in valid_exitcodes:
-                raise (subprocess.CalledProcessError(inp.returncode, "(pipe)"))
+                self.debug("EXIT   > {}".format(exit_code))
 
-        if valid_exitcodes and p.returncode not in valid_exitcodes:
-            raise (subprocess.CalledProcessError(p.returncode, encoded_cmd))
+            if (valid_exitcodes != []) and (exit_code not in valid_exitcodes):
+                self.error("Command \"{}\" returned exit code {} (valid codes: {})".format(cmd_item, exit_code, valid_exitcodes))
+                return False
+
+            return True
+
+        # add shell command and handlers to pipe
+        cmd_item=CmdItem(cmd=self._shell_cmd(cmd), readonly=readonly, stderr_handler=stderr_handler, exit_handler=exit_handler, shell=self.is_local())
+        cmd_pipe.add(cmd_item)
+
+        # return pipe instead of executing?
+        if pipe:
+            return cmd_pipe
+
+        # stdout parser
+        output_lines = []
+
+        def stdout_handler(line):
+            if tab_split:
+                output_lines.append(line.rstrip().split('\t'))
+            else:
+                output_lines.append(line.rstrip())
+            self._parse_stdout(line)
+
+        if cmd_pipe.should_execute():
+            self.debug("CMD    > {}".format(cmd_pipe))
+        else:
+            self.debug("CMDSKIP> {}".format(cmd_pipe))
+
+        # execute and calls handlers in CmdPipe
+        if not cmd_pipe.execute(stdout_handler=stdout_handler):
+            raise(ExecuteError("Last command returned error"))
 
         if return_stderr:
             return output_lines, error_lines
         else:
-            return output_lines
+            return output_lines

zfs_autobackup/LogConsole.py

@@ -3,35 +3,44 @@ from __future__ import print_function
 
 import sys
 
-
-colorama = False
-if sys.stdout.isatty():
-    try:
-        import colorama
-    except ImportError:
-        colorama = False
-        pass
-
-
 class LogConsole:
     """Log-class that outputs to console, adding colors if needed"""
 
-    def __init__(self, show_debug=False, show_verbose=False):
+    def __init__(self, show_debug, show_verbose, color):
         self.last_log = ""
         self.show_debug = show_debug
         self.show_verbose = show_verbose
 
-    @staticmethod
-    def error(txt):
-        if colorama:
+        if color:
+            # try to use color, failback if colorama not available
+            self.colorama=False
+            try:
+                import colorama
+                global colorama
+                self.colorama = True
+            except ImportError:
+                pass
+
+        else:
+            self.colorama=False
+
+    def error(self, txt):
+        if self.colorama:
             print(colorama.Fore.RED + colorama.Style.BRIGHT + "! " + txt + colorama.Style.RESET_ALL, file=sys.stderr)
         else:
             print("! " + txt, file=sys.stderr)
         sys.stderr.flush()
 
+    def warning(self, txt):
+        if self.colorama:
+            print(colorama.Fore.YELLOW + colorama.Style.BRIGHT + "  NOTE: " + txt + colorama.Style.RESET_ALL)
+        else:
+            print("  NOTE: " + txt)
+        sys.stdout.flush()
+
     def verbose(self, txt):
         if self.show_verbose:
-            if colorama:
+            if self.colorama:
                 print(colorama.Style.NORMAL + "  " + txt + colorama.Style.RESET_ALL)
             else:
                 print("  " + txt)
@@ -39,8 +48,19 @@ class LogConsole:
 
     def debug(self, txt):
         if self.show_debug:
-            if colorama:
+            if self.colorama:
                 print(colorama.Fore.GREEN + "# " + txt + colorama.Style.RESET_ALL)
             else:
                 print("# " + txt)
             sys.stdout.flush()
+
+    def progress(self, txt):
+        """print progress output to stderr (stays on same line)"""
+        self.clear_progress()
+        print(">>> {}\r".format(txt), end='', file=sys.stderr)
+        sys.stderr.flush()
+
+    def clear_progress(self):
+        import colorama
+        print(colorama.ansi.clear_line(), end='', file=sys.stderr)
+        sys.stderr.flush()

zfs_autobackup/LogStub.py

@@ -11,5 +11,8 @@ class LogStub:
     def verbose(self, txt):
         print("VERBOSE: " + txt)
 
+    def warning(self, txt):
+        print("WARNING: " + txt)
+
     def error(self, txt):
         print("ERROR  : " + txt)

zfs_autobackup/Thinner.py

@@ -7,8 +7,9 @@ class Thinner:
     """progressive thinner (universal, used for cleaning up snapshots)"""
 
     def __init__(self, schedule_str=""):
-        """schedule_str: comma seperated list of ThinnerRules. A plain number specifies how many snapshots to always
-        keep.
+        """
+        Args:
+            schedule_str: comma seperated list of ThinnerRules. A plain number specifies how many snapshots to always keep.
         """
 
         self.rules = []
@@ -19,7 +20,7 @@ class Thinner:
 
         rule_strs = schedule_str.split(",")
         for rule_str in rule_strs:
-            if rule_str.isdigit():
+            if rule_str.lstrip('-').isdigit():
                 self.always_keep = int(rule_str)
                 if self.always_keep < 0:
                     raise (Exception("Number of snapshots to keep cant be negative: {}".format(self.always_keep)))
@@ -37,11 +38,15 @@ class Thinner:
         return ret
 
     def thin(self, objects, keep_objects=None, now=None):
-        """thin list of objects with current schedule rules. objects: list of objects to thin. every object should
-        have timestamp attribute. keep_objects: objects to always keep (these should also be in normal objects list,
-        so we can use them to perhaps delete other obsolete objects)
+        """thin list of objects with current schedule rules. objects: list of
+        objects to thin. every object should have timestamp attribute.
 
             return( keeps, removes )
+
+        Args:
+            objects: list of objects to check (should have a timestamp attribute)
+            keep_objects: objects to always keep (if they also are in the in the normal objects list)
+            now: if specified, use this time as current time
         """
 
         if not keep_objects:

zfs_autobackup/ThinnerRule.py

@@ -39,6 +39,9 @@ class ThinnerRule:
         rule_str = rule_str.lower()
         matches = re.findall("([0-9]*)([a-z]*)([0-9]*)([a-z]*)", rule_str)[0]
 
+        if '' in matches:
+            raise (Exception("Invalid schedule string: '{}'".format(rule_str)))
+
         period_amount = int(matches[0])
         period_unit = matches[1]
         ttl_amount = int(matches[2])

zfs_autobackup/ZfsAutobackup.py

@@ -2,6 +2,8 @@ import argparse
 import sys
 import time
 
+from zfs_autobackup import compressors
+from zfs_autobackup.ExecuteNode import ExecuteNode
 from zfs_autobackup.Thinner import Thinner
 from zfs_autobackup.ZfsDataset import ZfsDataset
 from zfs_autobackup.LogConsole import LogConsole
@@ -9,11 +11,13 @@ from zfs_autobackup.ZfsNode import ZfsNode
 from zfs_autobackup.ThinnerRule import ThinnerRule
 
 
+
+
 class ZfsAutobackup:
     """main class"""
 
-    VERSION = "3.0.1-beta4"
-    HEADER = "zfs-autobackup v{} - Copyright 2020 E.H.Eefting (edwin@datux.nl)".format(VERSION)
+    VERSION = "3.1-rc1"
+    HEADER = "zfs-autobackup v{} - (c)2021 E.H.Eefting (edwin@datux.nl)".format(VERSION)
 
     def __init__(self, argv, print_arguments=True):
 
@@ -23,16 +27,15 @@ class ZfsAutobackup:
 
         parser = argparse.ArgumentParser(
             description=self.HEADER,
-            epilog='When a filesystem fails, zfs_backup will continue and report the number of failures at that end. '
-                   'Also the exit code will indicate the number of failures. Full manual at: https://github.com/psy0rz/zfs_autobackup')
-        parser.add_argument('--ssh-config', default=None, help='Custom ssh client config')
-        parser.add_argument('--ssh-source', default=None,
-                            help='Source host to get backup from. (user@hostname) Default %(default)s.')
-        parser.add_argument('--ssh-target', default=None,
-                            help='Target host to push backup to. (user@hostname) Default  %(default)s.')
-        parser.add_argument('--keep-source', type=str, default="10,1d1w,1w1m,1m1y",
+            epilog='Full manual at: https://github.com/psy0rz/zfs_autobackup')
+        parser.add_argument('--ssh-config', metavar='CONFIG-FILE', default=None, help='Custom ssh client config')
+        parser.add_argument('--ssh-source', metavar='USER@HOST', default=None,
+                            help='Source host to get backup from.')
+        parser.add_argument('--ssh-target', metavar='USER@HOST', default=None,
+                            help='Target host to push backup to.')
+        parser.add_argument('--keep-source', metavar='SCHEDULE', type=str, default="10,1d1w,1w1m,1m1y",
                             help='Thinning schedule for old source snapshots. Default: %(default)s')
-        parser.add_argument('--keep-target', type=str, default="10,1d1w,1w1m,1m1y",
+        parser.add_argument('--keep-target', metavar='SCHEDULE', type=str, default="10,1d1w,1w1m,1m1y",
                             help='Thinning schedule for old target snapshots. Default: %(default)s')
 
         parser.add_argument('backup_name', metavar='backup-name',
@@ -48,8 +51,10 @@ class ZfsAutobackup:
                             help='Don\'t create new snapshots (useful for finishing uncompleted backups, or cleanups)')
         parser.add_argument('--no-send', action='store_true',
                             help='Don\'t send snapshots (useful for cleanups, or if you want a serperate send-cronjob)')
-        #        parser.add_argument('--no-thinning', action='store_true', help='Don\'t run the thinner.')
-        parser.add_argument('--min-change', type=int, default=1,
+        parser.add_argument('--no-thinning', action='store_true', help="Do not destroy any snapshots.")
+        parser.add_argument('--no-holds', action='store_true',
+                            help='Don\'t hold snapshots. (Faster. Allows you to destroy common snapshot.)')
+        parser.add_argument('--min-change', metavar='BYTES', type=int, default=1,
                             help='Number of bytes written after which we consider a dataset changed (default %('
                                  'default)s)')
         parser.add_argument('--allow-empty', action='store_true',
@@ -57,11 +62,8 @@ class ZfsAutobackup:
         parser.add_argument('--ignore-replicated', action='store_true',
                             help='Ignore datasets that seem to be replicated some other way. (No changes since '
                                  'lastest snapshot. Useful for proxmox HA replication)')
-        parser.add_argument('--no-holds', action='store_true',
-                            help='Don\'t hold snapshots. (Faster)')
 
-        parser.add_argument('--resume', action='store_true', help=argparse.SUPPRESS)
-        parser.add_argument('--strip-path', default=0, type=int,
+        parser.add_argument('--strip-path', metavar='N', default=0, type=int,
                             help='Number of directories to strip from target path (use 1 when cloning zones between 2 '
                                  'SmartOS machines)')
         # parser.add_argument('--buffer', default="",  help='Use mbuffer with specified size to speedup zfs transfer.
@@ -73,10 +75,10 @@ class ZfsAutobackup:
         parser.add_argument('--clear-mountpoint', action='store_true',
                             help='Set property canmount=noauto for new datasets. (recommended, prevents mount '
                                  'conflicts. same as --set-properties canmount=noauto)')
-        parser.add_argument('--filter-properties', type=str,
+        parser.add_argument('--filter-properties', metavar='PROPERY,...', type=str,
                             help='List of properties to "filter" when receiving filesystems. (you can still restore '
                                  'them with zfs inherit -S)')
-        parser.add_argument('--set-properties', type=str,
+        parser.add_argument('--set-properties', metavar='PROPERTY=VALUE,...', type=str,
                             help='List of propererties to override when receiving filesystems. (you can still restore '
                                  'them with zfs inherit -S)')
         parser.add_argument('--rollback', action='store_true',
@@ -84,14 +86,18 @@ class ZfsAutobackup:
                                  'prevent changes by setting the readonly property on the target_path to on)')
         parser.add_argument('--destroy-incompatible', action='store_true',
                             help='Destroy incompatible snapshots on target. Use with care! (implies --rollback)')
-        parser.add_argument('--destroy-missing', type=str, default=None,
+        parser.add_argument('--destroy-missing', metavar="SCHEDULE", type=str, default=None,
                             help='Destroy datasets on target that are missing on the source. Specify the time since '
                                  'the last snapshot, e.g: --destroy-missing 30d')
         parser.add_argument('--ignore-transfer-errors', action='store_true',
                             help='Ignore transfer errors (still checks if received filesystem exists. useful for '
                                  'acltype errors)')
-        parser.add_argument('--raw', action='store_true',
-                            help='For encrypted datasets, send data exactly as it exists on disk.')
+
+        parser.add_argument('--decrypt', action='store_true',
+                            help='Decrypt data before sending it over.')
+
+        parser.add_argument('--encrypt', action='store_true',
+                            help='Encrypt data after receiving it.')
 
         parser.add_argument('--test', action='store_true',
                             help='dont change anything, just show what would be done (still does all read-only '
@@ -103,14 +109,31 @@ class ZfsAutobackup:
                             help='Show zfs commands and their output/exit codes. (noisy)')
         parser.add_argument('--progress', action='store_true',
                             help='show zfs progress output. Enabled automaticly on ttys. (use --no-progress to disable)')
-        parser.add_argument('--no-progress', action='store_true', help=argparse.SUPPRESS) #needed to workaround a zfs recv -v bug
+        parser.add_argument('--no-progress', action='store_true',
+                            help=argparse.SUPPRESS)  # needed to workaround a zfs recv -v bug
+
+        parser.add_argument('--resume', action='store_true', help=argparse.SUPPRESS)
+        parser.add_argument('--raw', action='store_true', help=argparse.SUPPRESS)
+        parser.add_argument('--exclude-received', action='store_true',
+                            help=argparse.SUPPRESS)  # probably never needed anymore
+
+        #these things all do stuff by piping zfs send/recv IO
+        parser.add_argument('--send-pipe', metavar="COMMAND", default=[], action='append',
+                            help='pipe zfs send output through COMMAND (can be used multiple times)')
+        parser.add_argument('--recv-pipe', metavar="COMMAND", default=[], action='append',
+                            help='pipe zfs recv input through COMMAND (can be used multiple times)')
+        parser.add_argument('--compress', metavar='TYPE', default=None, choices=compressors.choices(), help='Use compression during transfer, zstd-fast recommended. ({})'.format(", ".join(compressors.choices())))
+        parser.add_argument('--rate', metavar='DATARATE', default=None, help='Limit data transfer rate (e.g. 128K. requires mbuffer.)')
+        parser.add_argument('--buffer', metavar='SIZE', default=None, help='Add zfs send and recv buffers to smooth out IO bursts. (e.g. 128M. requires mbuffer)')
+
+
 
         # note args is the only global variable we use, since its a global readonly setting anyway
         args = parser.parse_args(argv)
 
         self.args = args
 
-        #auto enable progress?
+        # auto enable progress?
         if sys.stderr.isatty() and not args.no_progress:
             args.progress = True
 
@@ -126,18 +149,29 @@ class ZfsAutobackup:
         if args.destroy_incompatible:
             args.rollback = True
 
-        self.log = LogConsole(show_debug=self.args.debug, show_verbose=self.args.verbose)
+        self.log = LogConsole(show_debug=self.args.debug, show_verbose=self.args.verbose, color=sys.stdout.isatty())
+        self.verbose(self.HEADER)
 
         if args.resume:
-            self.verbose("NOTE: The --resume option isn't needed anymore (its autodetected now)")
+            self.warning("The --resume option isn't needed anymore (its autodetected now)")
+
+        if args.raw:
+            self.warning(
+                "The --raw option isn't needed anymore (its autodetected now). Also see --encrypt and --decrypt.")
 
         if args.target_path is not None and args.target_path[0] == "/":
             self.log.error("Target should not start with a /")
             sys.exit(255)
 
+        if args.compress and args.ssh_source is None and args.ssh_target is None:
+            self.warning("Using compression, but transfer is local.")
+
     def verbose(self, txt):
         self.log.verbose(txt)
 
+    def warning(self, txt):
+        self.log.warning(txt)
+
     def error(self, txt):
         self.log.error(txt)
 
@@ -148,52 +182,177 @@ class ZfsAutobackup:
         self.log.verbose("")
         self.log.verbose("#### " + title)
 
-    # sync datasets, or thin-only on both sides
-    # target is needed for this.
-    def sync_datasets(self, source_node, source_datasets):
+    def progress(self, txt):
+        self.log.progress(txt)
 
-        description = "[Target]"
+    def clear_progress(self):
+        self.log.clear_progress()
 
-        self.set_title("Target settings")
+    # NOTE: this method also uses self.args. args that need extra processing are passed as function parameters:
+    def thin_missing_targets(self, target_dataset, used_target_datasets):
+        """thin target datasets that are missing on the source."""
 
-        target_thinner = Thinner(self.args.keep_target)
-        target_node = ZfsNode(self.args.backup_name, self, ssh_config=self.args.ssh_config, ssh_to=self.args.ssh_target,
-                              readonly=self.args.test, debug_output=self.args.debug_output, description=description,
-                              thinner=target_thinner)
-        target_node.verbose("Receive datasets under: {}".format(self.args.target_path))
+        self.debug("Thinning obsolete datasets")
+        missing_datasets = [dataset for dataset in target_dataset.recursive_datasets if
+                            dataset not in used_target_datasets]
 
-        if self.args.no_send:
-            self.set_title("Thinning source and target")
-        else:
-            self.set_title("Sending and thinning")
+        count = 0
+        for dataset in missing_datasets:
 
-        # check if exists, to prevent vague errors
-        target_dataset = ZfsDataset(target_node, self.args.target_path)
-        if not target_dataset.exists:
-            self.error("Target path '{}' does not exist. Please create this dataset first.".format(target_dataset))
-            return 255
+            count = count + 1
+            if self.args.progress:
+                self.progress("Analysing missing {}/{}".format(count, len(missing_datasets)))
 
-        if self.args.filter_properties:
-            filter_properties = self.args.filter_properties.split(",")
-        else:
-            filter_properties = []
+            try:
+                dataset.debug("Missing on source, thinning")
+                dataset.thin()
 
-        if self.args.set_properties:
-            set_properties = self.args.set_properties.split(",")
-        else:
-            set_properties = []
+            except Exception as e:
+                dataset.error("Error during thinning of missing datasets ({})".format(str(e)))
 
-        if self.args.clear_refreservation:
-            filter_properties.append("refreservation")
+        if self.args.progress:
+            self.clear_progress()
 
-        if self.args.clear_mountpoint:
-            set_properties.append("canmount=noauto")
+    # NOTE: this method also uses self.args. args that need extra processing are passed as function parameters:
+    def destroy_missing_targets(self, target_dataset, used_target_datasets):
+        """destroy target datasets that are missing on the source and that meet the requirements"""
+
+        self.debug("Destroying obsolete datasets")
+
+        missing_datasets = [dataset for dataset in target_dataset.recursive_datasets if
+                            dataset not in used_target_datasets]
+
+        count = 0
+        for dataset in missing_datasets:
+
+            count = count + 1
+            if self.args.progress:
+                self.progress("Analysing destroy missing {}/{}".format(count, len(missing_datasets)))
+
+            try:
+                # cant do anything without our own snapshots
+                if not dataset.our_snapshots:
+                    if dataset.datasets:
+                        # its not a leaf, just ignore
+                        dataset.debug("Destroy missing: ignoring")
+                    else:
+                        dataset.verbose(
+                            "Destroy missing: has no snapshots made by us. (please destroy manually)")
+                else:
+                    # past the deadline?
+                    deadline_ttl = ThinnerRule("0s" + self.args.destroy_missing).ttl
+                    now = int(time.time())
+                    if dataset.our_snapshots[-1].timestamp + deadline_ttl > now:
+                        dataset.verbose("Destroy missing: Waiting for deadline.")
+                    else:
+
+                        dataset.debug("Destroy missing: Removing our snapshots.")
+
+                        # remove all our snaphots, except last, to safe space in case we fail later on
+                        for snapshot in dataset.our_snapshots[:-1]:
+                            snapshot.destroy(fail_exception=True)
+
+                        # does it have other snapshots?
+                        has_others = False
+                        for snapshot in dataset.snapshots:
+                            if not snapshot.is_ours():
+                                has_others = True
+                                break
+
+                        if has_others:
+                            dataset.verbose("Destroy missing: Still in use by other snapshots")
+                        else:
+                            if dataset.datasets:
+                                dataset.verbose("Destroy missing: Still has children here.")
+                            else:
+                                dataset.verbose("Destroy missing.")
+                                dataset.our_snapshots[-1].destroy(fail_exception=True)
+                                dataset.destroy(fail_exception=True)
+
+            except Exception as e:
+                dataset.error("Error during --destroy-missing: {}".format(str(e)))
+
+        if self.args.progress:
+            self.clear_progress()
+
+    def get_send_pipes(self, logger):
+        """determine the zfs send pipe"""
+
+        ret=[]
+
+        # IO buffer
+        if self.args.buffer:
+            logger("zfs send buffer        : {}".format(self.args.buffer))
+            ret.extend([ ExecuteNode.PIPE, "mbuffer", "-q", "-s128k", "-m"+self.args.buffer ])
+
+        # custom pipes
+        for send_pipe in self.args.send_pipe:
+            ret.append(ExecuteNode.PIPE)
+            ret.extend(send_pipe.split(" "))
+            logger("zfs send custom pipe   : {}".format(send_pipe))
+
+        # compression
+        if self.args.compress!=None:
+            ret.append(ExecuteNode.PIPE)
+            cmd=compressors.compress_cmd(self.args.compress)
+            ret.extend(cmd)
+            logger("zfs send compression   : {}".format(" ".join(cmd)))
+
+        # transfer rate
+        if self.args.rate:
+            logger("zfs send transfer rate : {}".format(self.args.rate))
+            ret.extend([ ExecuteNode.PIPE, "mbuffer", "-q", "-s128k", "-m16M", "-R"+self.args.rate ])
+
+
+        return ret
+
+    def get_recv_pipes(self, logger):
+
+        ret=[]
+
+        # decompression
+        if self.args.compress!=None:
+            cmd=compressors.decompress_cmd(self.args.compress)
+            ret.extend(cmd)
+            ret.append(ExecuteNode.PIPE)
+            logger("zfs recv decompression : {}".format(" ".join(cmd)))
+
+        # custom pipes
+        for recv_pipe in self.args.recv_pipe:
+            ret.extend(recv_pipe.split(" "))
+            ret.append(ExecuteNode.PIPE)
+            logger("zfs recv custom pipe   : {}".format(recv_pipe))
+
+        # IO buffer
+        if self.args.buffer:
+            #only add second buffer if its usefull. (e.g. non local transfer or other pipes active)
+            if self.args.ssh_source!=None or self.args.ssh_target!=None or self.args.recv_pipe or self.args.send_pipe or self.args.compress!=None:
+                logger("zfs recv buffer        : {}".format(self.args.buffer))
+                ret.extend(["mbuffer", "-q", "-s128k", "-m"+self.args.buffer,  ExecuteNode.PIPE ])
+
+        return ret
+
+    # NOTE: this method also uses self.args. args that need extra processing are passed as function parameters:
+    def sync_datasets(self, source_node, source_datasets, target_node):
+        """Sync datasets, or thin-only on both sides
+        :type target_node: ZfsNode
+        :type source_datasets: list of ZfsDataset
+        :type source_node: ZfsNode
+        """
+
+        send_pipes=self.get_send_pipes(source_node.verbose)
+        recv_pipes=self.get_recv_pipes(target_node.verbose)
 
-        # sync datasets
         fail_count = 0
+        count = 0
         target_datasets = []
         for source_dataset in source_datasets:
 
+            # stats
+            if self.args.progress:
+                count = count + 1
+                self.progress("Analysing dataset {}/{} ({} failed)".format(count, len(source_datasets), fail_count))
+
             try:
                 # determine corresponding target_dataset
                 target_name = self.args.target_path + "/" + source_dataset.lstrip_path(self.args.strip_path)
@@ -207,86 +366,40 @@ class ZfsAutobackup:
                         and not target_dataset.parent.exists:
                     target_dataset.parent.create_filesystem(parents=True)
 
-                # determine common zpool features
+                # determine common zpool features (cached, so no problem we call it often)
                 source_features = source_node.get_zfs_pool(source_dataset.split_path()[0]).features
                 target_features = target_node.get_zfs_pool(target_dataset.split_path()[0]).features
                 common_features = source_features and target_features
-                # source_dataset.debug("Common features: {}".format(common_features))
 
+                # sync the snapshots of this dataset
                 source_dataset.sync_snapshots(target_dataset, show_progress=self.args.progress,
-                                              features=common_features, filter_properties=filter_properties,
-                                              set_properties=set_properties,
+                                              features=common_features, filter_properties=self.filter_properties_list(),
+                                              set_properties=self.set_properties_list(),
                                               ignore_recv_exit_code=self.args.ignore_transfer_errors,
                                               holds=not self.args.no_holds, rollback=self.args.rollback,
-                                              raw=self.args.raw, other_snapshots=self.args.other_snapshots,
+                                              also_other_snapshots=self.args.other_snapshots,
                                               no_send=self.args.no_send,
-                                              destroy_incompatible=self.args.destroy_incompatible)
+                                              destroy_incompatible=self.args.destroy_incompatible,
+                                              send_pipes=send_pipes, recv_pipes=recv_pipes,
+                                              decrypt=self.args.decrypt, encrypt=self.args.encrypt, )
             except Exception as e:
                 fail_count = fail_count + 1
                 source_dataset.error("FAILED: " + str(e))
                 if self.args.debug:
                     raise
 
-        # if not self.args.no_thinning:
-        self.thin_missing_targets(ZfsDataset(target_node, self.args.target_path), target_datasets)
+        if self.args.progress:
+            self.clear_progress()
+
+        target_path_dataset = ZfsDataset(target_node, self.args.target_path)
+        if not self.args.no_thinning:
+            self.thin_missing_targets(target_dataset=target_path_dataset, used_target_datasets=target_datasets)
+
+        if self.args.destroy_missing is not None:
+            self.destroy_missing_targets(target_dataset=target_path_dataset, used_target_datasets=target_datasets)
 
         return fail_count
 
-    def thin_missing_targets(self, target_dataset, used_target_datasets):
-        """thin/destroy target datasets that are missing on the source."""
-
-        self.debug("Thinning obsolete datasets")
-
-        for dataset in target_dataset.recursive_datasets:
-            try:
-                if dataset not in used_target_datasets:
-                    dataset.debug("Missing on source, thinning")
-                    dataset.thin()
-
-                    # destroy_missing enabled?
-                    if self.args.destroy_missing is not None:
-
-                        # cant do anything without our own snapshots
-                        if not dataset.our_snapshots:
-                            if dataset.datasets:
-                                dataset.debug("Destroy missing: ignoring")
-                            else:
-                                dataset.verbose(
-                                    "Destroy missing: has no snapshots made by us. (please destroy manually)")
-                        else:
-                            # past the deadline?
-                            deadline_ttl = ThinnerRule("0s" + self.args.destroy_missing).ttl
-                            now = int(time.time())
-                            if dataset.our_snapshots[-1].timestamp + deadline_ttl > now:
-                                dataset.verbose("Destroy missing: Waiting for deadline.")
-                            else:
-
-                                dataset.debug("Destroy missing: Removing our snapshots.")
-
-                                # remove all our snaphots, except last, to safe space in case we fail later on
-                                for snapshot in dataset.our_snapshots[:-1]:
-                                    snapshot.destroy(fail_exception=True)
-
-                                # does it have other snapshots?
-                                has_others = False
-                                for snapshot in dataset.snapshots:
-                                    if not snapshot.is_ours():
-                                        has_others = True
-                                        break
-
-                                if has_others:
-                                    dataset.verbose("Destroy missing: Still in use by other snapshots")
-                                else:
-                                    if dataset.datasets:
-                                        dataset.verbose("Destroy missing: Still has children here.")
-                                    else:
-                                        dataset.verbose("Destroy missing.")
-                                        dataset.our_snapshots[-1].destroy(fail_exception=True)
-                                        dataset.destroy(fail_exception=True)
-
-            except Exception as e:
-                dataset.error("Error during destoy missing ({})".format(str(e)))
-
     def thin_source(self, source_datasets):
 
         self.set_title("Thinning source")
@@ -294,18 +407,59 @@ class ZfsAutobackup:
         for source_dataset in source_datasets:
             source_dataset.thin(skip_holds=True)
 
+    def filter_replicated(self, datasets):
+        if not self.args.ignore_replicated:
+            return datasets
+        else:
+            self.set_title("Filtering already replicated filesystems")
+            ret = []
+            for dataset in datasets:
+                if dataset.is_changed(self.args.min_change):
+                    ret.append(dataset)
+                else:
+                    dataset.verbose("Ignoring, already replicated")
+
+            return ret
+
+    def filter_properties_list(self):
+
+        if self.args.filter_properties:
+            filter_properties = self.args.filter_properties.split(",")
+        else:
+            filter_properties = []
+
+        if self.args.clear_refreservation:
+            filter_properties.append("refreservation")
+
+        return filter_properties
+
+    def set_properties_list(self):
+
+        if self.args.set_properties:
+            set_properties = self.args.set_properties.split(",")
+        else:
+            set_properties = []
+
+        if self.args.clear_mountpoint:
+            set_properties.append("canmount=noauto")
+
+        return set_properties
+
     def run(self):
 
         try:
-            self.verbose(self.HEADER)
 
             if self.args.test:
-                self.verbose("TEST MODE - SIMULATING WITHOUT MAKING ANY CHANGES")
+                self.warning("TEST MODE - SIMULATING WITHOUT MAKING ANY CHANGES")
 
+            ################ create source zfsNode
             self.set_title("Source settings")
 
             description = "[Source]"
-            source_thinner = Thinner(self.args.keep_source)
+            if self.args.no_thinning:
+                source_thinner = None
+            else:
+                source_thinner = Thinner(self.args.keep_source)
             source_node = ZfsNode(self.args.backup_name, self, ssh_config=self.args.ssh_config,
                                   ssh_to=self.args.ssh_source, readonly=self.args.test,
                                   debug_output=self.args.debug_output, description=description, thinner=source_thinner)
@@ -314,8 +468,24 @@ class ZfsAutobackup:
                 "'autobackup:{}=child')".format(
                     self.args.backup_name, self.args.backup_name))
 
+            ################# select source datasets
             self.set_title("Selecting")
-            selected_source_datasets = source_node.selected_datasets
+
+            #Note: Before version v3.1-beta5, we always used exclude_received. This was a problem if you wanto to replicate an existing backup to another host and use the same backupname/snapshots.
+            exclude_paths = []
+            exclude_received=self.args.exclude_received
+            if self.args.ssh_source == self.args.ssh_target:
+                if self.args.target_path:
+                    # target and source are the same, make sure to exclude target_path
+                    self.warning("Source and target are on the same host, excluding target-path from selection.")
+                    exclude_paths.append(self.args.target_path)
+                else:
+                    self.warning("Source and target are on the same host, excluding received datasets from selection.")
+                    exclude_received=True
+
+
+            selected_source_datasets = source_node.selected_datasets(exclude_received=exclude_received,
+                                                                     exclude_paths=exclude_paths)
             if not selected_source_datasets:
                 self.error(
                     "No source filesystems selected, please do a 'zfs set autobackup:{0}=true' on the source datasets "
@@ -323,34 +493,56 @@ class ZfsAutobackup:
                         self.args.backup_name))
                 return 255
 
-            source_datasets = []
-
             # filter out already replicated stuff?
-            if not self.args.ignore_replicated:
-                source_datasets = selected_source_datasets
-            else:
-                self.set_title("Filtering already replicated filesystems")
-                for selected_source_dataset in selected_source_datasets:
-                    if selected_source_dataset.is_changed(self.args.min_change):
-                        source_datasets.append(selected_source_dataset)
-                    else:
-                        selected_source_dataset.verbose("Ignoring, already replicated")
+            source_datasets = self.filter_replicated(selected_source_datasets)
 
+            ################# snapshotting
             if not self.args.no_snapshot:
                 self.set_title("Snapshotting")
                 source_node.consistent_snapshot(source_datasets, source_node.new_snapshotname(),
                                                 min_changed_bytes=self.args.min_change)
 
+            ################# sync
             # if target is specified, we sync the datasets, otherwise we just thin the source. (e.g. snapshot mode)
             if self.args.target_path:
-                fail_count = self.sync_datasets(source_node, source_datasets)
+
+                # create target_node
+                self.set_title("Target settings")
+                if self.args.no_thinning:
+                    target_thinner = None
+                else:
+                    target_thinner = Thinner(self.args.keep_target)
+                target_node = ZfsNode(self.args.backup_name, self, ssh_config=self.args.ssh_config,
+                                      ssh_to=self.args.ssh_target,
+                                      readonly=self.args.test, debug_output=self.args.debug_output,
+                                      description="[Target]",
+                                      thinner=target_thinner)
+                target_node.verbose("Receive datasets under: {}".format(self.args.target_path))
+
+                self.set_title("Synchronising")
+
+                # check if exists, to prevent vague errors
+                target_dataset = ZfsDataset(target_node, self.args.target_path)
+                if not target_dataset.exists:
+                    raise (Exception(
+                        "Target path '{}' does not exist. Please create this dataset first.".format(target_dataset)))
+
+                # do the actual sync
+                # NOTE: even with no_send, no_thinning and no_snapshot it does a usefull thing because it checks if the common snapshots and shows incompatible snapshots
+                fail_count = self.sync_datasets(
+                    source_node=source_node,
+                    source_datasets=source_datasets,
+                    target_node=target_node)
+
+            # no target specified, run in snapshot-only mode
             else:
-                self.thin_source(source_datasets)
+                if not self.args.no_thinning:
+                    self.thin_source(source_datasets)
                 fail_count = 0
 
             if not fail_count:
                 if self.args.test:
-                    self.set_title("All tests successfull.")
+                    self.set_title("All tests successful.")
                 else:
                     self.set_title("All operations completed successfully")
                     if not self.args.target_path:
@@ -358,11 +550,11 @@ class ZfsAutobackup:
 
             else:
                 if fail_count != 255:
-                    self.error("{} failures!".format(fail_count))
+                    self.error("{} dataset(s) failed!".format(fail_count))
 
             if self.args.test:
                 self.verbose("")
-                self.verbose("TEST MODE - DID NOT MAKE ANY CHANGES!")
+                self.warning("TEST MODE - DID NOT MAKE ANY CHANGES!")
 
             return fail_count
 

zfs_autobackup/ZfsDataset.py

@@ -1,15 +1,14 @@
 import re
-import subprocess
 import time
 
 from zfs_autobackup.CachedProperty import CachedProperty
+from zfs_autobackup.ExecuteNode import ExecuteError
 
 
 class ZfsDataset:
-    """a zfs dataset (filesystem/volume/snapshot/clone)
-    Note that a dataset doesn't have to actually exist (yet/anymore)
-    Also most properties are cached for performance-reasons, but also to allow --test to function correctly.
-
+    """a zfs dataset (filesystem/volume/snapshot/clone) Note that a dataset
+    doesn't have to actually exist (yet/anymore) Also most properties are cached
+    for performance-reasons, but also to allow --test to function correctly.
     """
 
     # illegal properties per dataset type. these will be removed from --set-properties and --filter-properties
@@ -19,8 +18,11 @@ class ZfsDataset:
     }
 
     def __init__(self, zfs_node, name, force_exists=None):
-        """name: full path of the zfs dataset exists: specify if you already know a dataset exists or not. for
-        performance and testing reasons. (otherwise it will have to check with zfs list when needed)
+        """
+        Args:
+            :type zfs_node: ZfsNode.ZfsNode
+            :type name: str
+            :type force_exists: bool
         """
         self.zfs_node = zfs_node
         self.name = name  # full name
@@ -41,12 +43,24 @@ class ZfsDataset:
         return self.name == obj.name
 
     def verbose(self, txt):
+        """
+        Args:
+            :type txt: str
+        """
         self.zfs_node.verbose("{}: {}".format(self.name, txt))
 
     def error(self, txt):
+        """
+        Args:
+            :type txt: str
+        """
         self.zfs_node.error("{}: {}".format(self.name, txt))
 
     def debug(self, txt):
+        """
+        Args:
+            :type txt: str
+        """
         self.zfs_node.debug("{}: {}".format(self.name, txt))
 
     def invalidate(self):
@@ -60,11 +74,19 @@ class ZfsDataset:
         return self.name.split("/")
 
     def lstrip_path(self, count):
-        """return name with first count components stripped"""
+        """return name with first count components stripped
+
+        Args:
+            :type count: int
+        """
         return "/".join(self.split_path()[count:])
 
     def rstrip_path(self, count):
-        """return name with last count components stripped"""
+        """return name with last count components stripped
+
+        Args:
+            :type count: int
+        """
         return "/".join(self.split_path()[:-count])
 
     @property
@@ -90,10 +112,57 @@ class ZfsDataset:
         """true if this dataset is a snapshot"""
         return self.name.find("@") != -1
 
+    def is_selected(self, value, source, inherited, exclude_received, exclude_paths):
+        """determine if dataset should be selected for backup (called from
+        ZfsNode)
+
+        Args:
+            :type exclude_paths: list of str
+            :type value: str
+            :type source: str
+            :type inherited: bool
+            :type exclude_received: bool
+        """
+
+        # sanity checks
+        if source not in ["local", "received", "-"]:
+            # probably a program error in zfs-autobackup or new feature in zfs
+            raise (Exception(
+                "{} autobackup-property has illegal source: '{}' (possible BUG)".format(self.name, source)))
+
+        if value not in ["false", "true", "child", "-"]:
+            # user error
+            raise (Exception(
+                "{} autobackup-property has illegal value: '{}'".format(self.name, value)))
+
+        # our path starts with one of the excluded paths?
+        for exclude_path in exclude_paths:
+            if self.name.startswith(exclude_path):
+                # too noisy for verbose
+                self.debug("Excluded (in exclude list)")
+                return False
+
+        # now determine if its actually selected
+        if value == "false":
+            self.verbose("Excluded (disabled)")
+            return False
+        elif value == "true" or (value == "child" and inherited):
+            if source == "local":
+                self.verbose("Selected")
+                return True
+            elif source == "received":
+                if exclude_received:
+                    self.verbose("Excluded (dataset already received)")
+                    return False
+                else:
+                    self.verbose("Selected")
+                    return True
+
     @CachedProperty
     def parent(self):
-        """get zfs-parent of this dataset. for snapshots this means it will get the filesystem/volume that it belongs
-        to. otherwise it will return the parent according to path
+        """get zfs-parent of this dataset. for snapshots this means it will get
+        the filesystem/volume that it belongs to. otherwise it will return the
+        parent according to path
 
         we cache this so everything in the parent that is cached also stays.
         """
@@ -102,39 +171,51 @@ class ZfsDataset:
         else:
             return ZfsDataset(self.zfs_node, self.rstrip_path(1))
 
-    def find_prev_snapshot(self, snapshot, other_snapshots=False):
-        """find previous snapshot in this dataset. None if it doesn't exist.
+    # NOTE: unused for now
+    # def find_prev_snapshot(self, snapshot, also_other_snapshots=False):
+    #     """find previous snapshot in this dataset. None if it doesn't exist.
+    #
+    #     also_other_snapshots: set to true to also return snapshots that where
+    #     not created by us. (is_ours)
+    #
+    #     Args:
+    #         :type snapshot: str or ZfsDataset.ZfsDataset
+    #         :type also_other_snapshots: bool
+    #     """
+    #
+    #     if self.is_snapshot:
+    #         raise (Exception("Please call this on a dataset."))
+    #
+    #     index = self.find_snapshot_index(snapshot)
+    #     while index:
+    #         index = index - 1
+    #         if also_other_snapshots or self.snapshots[index].is_ours():
+    #             return self.snapshots[index]
+    #     return None
 
-        other_snapshots: set to true to also return snapshots that where not created by us. (is_ours)
+    def find_next_snapshot(self, snapshot, also_other_snapshots=False):
+        """find next snapshot in this dataset. None if it doesn't exist
+
+        Args:
+            :type snapshot: ZfsDataset
+            :type also_other_snapshots: bool
         """
 
-        if self.is_snapshot:
-            raise (Exception("Please call this on a dataset."))
-
-        index = self.find_snapshot_index(snapshot)
-        while index:
-            index = index - 1
-            if other_snapshots or self.snapshots[index].is_ours():
-                return self.snapshots[index]
-        return None
-
-    def find_next_snapshot(self, snapshot, other_snapshots=False):
-        """find next snapshot in this dataset. None if it doesn't exist"""
-
         if self.is_snapshot:
             raise (Exception("Please call this on a dataset."))
 
         index = self.find_snapshot_index(snapshot)
         while index is not None and index < len(self.snapshots) - 1:
             index = index + 1
-            if other_snapshots or self.snapshots[index].is_ours():
+            if also_other_snapshots or self.snapshots[index].is_ours():
                 return self.snapshots[index]
         return None
 
     @CachedProperty
     def exists(self):
-        """check if dataset exists.
-        Use force to force a specific value to be cached, if you already know. Useful for performance reasons"""
+        """check if dataset exists. Use force to force a specific value to be
+        cached, if you already know. Useful for performance reasons
+        """
 
         if self.force_exists is not None:
             self.debug("Checking if filesystem exists: was forced to {}".format(self.force_exists))
@@ -146,7 +227,11 @@ class ZfsDataset:
                                   hide_errors=True) and True)
 
     def create_filesystem(self, parents=False):
-        """create a filesystem"""
+        """create a filesystem
+
+        Args:
+            :type parents: bool
+        """
         if parents:
             self.verbose("Creating filesystem and parents")
             self.zfs_node.run(["zfs", "create", "-p", self.name])
@@ -157,7 +242,12 @@ class ZfsDataset:
         self.force_exists = True
 
     def destroy(self, fail_exception=False):
-        """destroy the dataset. by default failures are not an exception, so we can continue making backups"""
+        """destroy the dataset. by default failures are not an exception, so we
+        can continue making backups
+
+        Args:
+            :type fail_exception: bool
+        """
 
         self.verbose("Destroying")
 
@@ -169,7 +259,7 @@ class ZfsDataset:
             self.invalidate()
             self.force_exists = False
             return True
-        except subprocess.CalledProcessError:
+        except ExecuteError:
             if not fail_exception:
                 return False
             else:
@@ -196,7 +286,11 @@ class ZfsDataset:
         return ret
 
     def is_changed(self, min_changed_bytes=1):
-        """dataset is changed since ANY latest snapshot ?"""
+        """dataset is changed since ANY latest snapshot ?
+
+        Args:
+            :type min_changed_bytes: int
+        """
         self.debug("Checking if dataset is changed")
 
         if min_changed_bytes == 0:
@@ -243,7 +337,9 @@ class ZfsDataset:
 
     @property
     def timestamp(self):
-        """get timestamp from snapshot name. Only works for our own snapshots with the correct format."""
+        """get timestamp from snapshot name. Only works for our own snapshots
+        with the correct format.
+        """
         time_str = re.findall("^.*-([0-9]*)$", self.snapshot_name)[0]
         if len(time_str) != 14:
             raise (Exception("Snapshot has invalid timestamp in name: {}".format(self.snapshot_name)))
@@ -253,7 +349,11 @@ class ZfsDataset:
         return time_secs
 
     def from_names(self, names):
-        """convert a list of names to a list ZfsDatasets for this zfs_node"""
+        """convert a list of names to a list ZfsDatasets for this zfs_node
+
+        Args:
+            :type names: list of str
+        """
         ret = []
         for name in names:
             ret.append(ZfsDataset(self.zfs_node, name))
@@ -277,7 +377,6 @@ class ZfsDataset:
     def snapshots(self):
         """get all snapshots of this dataset"""
 
-
         if not self.exists:
             return []
 
@@ -300,7 +399,13 @@ class ZfsDataset:
         return ret
 
     def find_snapshot(self, snapshot):
-        """find snapshot by snapshot (can be a snapshot_name or a different ZfsDataset )"""
+        """find snapshot by snapshot (can be a snapshot_name or a different
+        ZfsDataset )
+
+        Args:
+            :rtype: ZfsDataset
+            :type snapshot: str or ZfsDataset
+        """
 
         if not isinstance(snapshot, ZfsDataset):
             snapshot_name = snapshot
@@ -314,7 +419,12 @@ class ZfsDataset:
         return None
 
     def find_snapshot_index(self, snapshot):
-        """find snapshot index by snapshot (can be a snapshot_name or ZfsDataset)"""
+        """find snapshot index by snapshot (can be a snapshot_name or
+        ZfsDataset)
+
+        Args:
+            :type snapshot: str or ZfsDataset
+        """
 
         if not isinstance(snapshot, ZfsDataset):
             snapshot_name = snapshot
@@ -343,7 +453,11 @@ class ZfsDataset:
         return int(output[0])
 
     def is_changed_ours(self, min_changed_bytes=1):
-        """dataset is changed since OUR latest snapshot?"""
+        """dataset is changed since OUR latest snapshot?
+
+        Args:
+            :type min_changed_bytes: int
+        """
 
         if min_changed_bytes == 0:
             return True
@@ -359,7 +473,11 @@ class ZfsDataset:
 
     @CachedProperty
     def recursive_datasets(self, types="filesystem,volume"):
-        """get all (non-snapshot) datasets recursively under us"""
+        """get all (non-snapshot) datasets recursively under us
+
+        Args:
+            :type types: str
+        """
 
         self.debug("Getting all recursive datasets under us")
 
@@ -371,7 +489,11 @@ class ZfsDataset:
 
     @CachedProperty
     def datasets(self, types="filesystem,volume"):
-        """get all (non-snapshot) datasets directly under us"""
+        """get all (non-snapshot) datasets directly under us
+
+        Args:
+            :type types: str
+        """
 
         self.debug("Getting all datasets under us")
 
@@ -381,11 +503,20 @@ class ZfsDataset:
 
         return self.from_names(names[1:])
 
-    def send_pipe(self, features, prev_snapshot=None, resume_token=None, show_progress=False, raw=False):
+    def send_pipe(self, features, prev_snapshot, resume_token, show_progress, raw, send_properties, write_embedded, send_pipes):
         """returns a pipe with zfs send output for this snapshot
 
-        resume_token: resume sending from this token. (in that case we don't need to know snapshot names)
+        resume_token: resume sending from this token. (in that case we don't
+        need to know snapshot names)
 
+        Args:
+            :param send_pipes: output cmd array that will be added to actual zfs send command. (e.g. mbuffer or compression program)
+            :type send_pipes: list of str
+            :type features: list of str
+            :type prev_snapshot: ZfsDataset
+            :type resume_token: str
+            :type show_progress: bool
+            :type raw: bool
         """
         # build source command
         cmd = []
@@ -394,28 +525,22 @@ class ZfsDataset:
 
         # all kind of performance options:
         if 'large_blocks' in features and "-L" in self.zfs_node.supported_send_options:
-            cmd.append("-L")  # large block support (only if recordsize>128k which is seldomly used)
+            cmd.append("--large-block")  # large block support (only if recordsize>128k which is seldomly used)
 
-        if 'embedded_data' in features and "-e" in self.zfs_node.supported_send_options:
-            cmd.append("-e")  # WRITE_EMBEDDED, more compact stream
+        if write_embedded and 'embedded_data' in features and "-e" in self.zfs_node.supported_send_options:
+            cmd.append("--embed")  # WRITE_EMBEDDED, more compact stream
 
         if "-c" in self.zfs_node.supported_send_options:
-            cmd.append("-c")  # use compressed WRITE records
+            cmd.append("--compressed")  # use compressed WRITE records
 
-        # NOTE: performance is usually worse with this option, according to manual
-        # also -D will be depricated in newer ZFS versions
-        # if not resume:
-        #     if "-D" in self.zfs_node.supported_send_options:
-        #         cmd.append("-D") # dedupped stream, sends less duplicate data
-
-        # raw? (for encryption)
+        # raw? (send over encrypted data in its original encrypted form without decrypting)
         if raw:
             cmd.append("--raw")
 
         # progress output
         if show_progress:
-            cmd.append("-v")
-            cmd.append("-P")
+            cmd.append("--verbose")
+            cmd.append("--parsable")
 
         # resume a previous send? (don't need more parameters in that case)
         if resume_token:
@@ -423,7 +548,8 @@ class ZfsDataset:
 
         else:
             # send properties
-            cmd.append("-p")
+            if send_properties:
+                cmd.append("--props")
 
             # incremental?
             if prev_snapshot:
@@ -431,17 +557,26 @@ class ZfsDataset:
 
             cmd.append(self.name)
 
-        # if args.buffer and args.ssh_source!="local":
-        #     cmd.append("|mbuffer -m {}".format(args.buffer))
+        cmd.extend(send_pipes)
 
-        # NOTE: this doesn't start the send yet, it only returns a subprocess.Pipe
-        return self.zfs_node.run(cmd, pipe=True)
+        output_pipe = self.zfs_node.run(cmd, pipe=True, readonly=True)
 
-    def recv_pipe(self, pipe, features, filter_properties=None, set_properties=None, ignore_exit_code=False):
+        return output_pipe
+
+    def recv_pipe(self, pipe, features, recv_pipes, filter_properties=None, set_properties=None, ignore_exit_code=False):
         """starts a zfs recv for this snapshot and uses pipe as input
 
-        note: you can it both on a snapshot or filesystem object.
-        The resulting zfs command is the same, only our object cache is invalidated differently.
+        note: you can it both on a snapshot or filesystem object. The
+        resulting zfs command is the same, only our object cache is invalidated
+        differently.
+
+        Args:
+            :param recv_pipes: input cmd array that will be prepended to actual zfs recv command. (e.g. mbuffer or decompression program)
+            :type pipe: subprocess.pOpen
+            :type features: list of str
+            :type filter_properties: list of str
+            :type set_properties: list of str
+            :type ignore_exit_code: bool
         """
 
         if set_properties is None:
@@ -453,6 +588,8 @@ class ZfsDataset:
         # build target command
         cmd = []
 
+        cmd.extend(recv_pipes)
+
         cmd.extend(["zfs", "recv"])
 
         # don't mount filesystem that is received
@@ -489,21 +626,32 @@ class ZfsDataset:
         if self.zfs_node.readonly:
             self.force_exists = True
 
-        # check if transfer was really ok (exit codes have been wrong before due to bugs in zfs-utils and can be
-        # ignored by some parameters)
+        # check if transfer was really ok (exit codes have been wrong before due to bugs in zfs-utils and some
+        # errors should be ignored, thats where the ignore_exitcodes is for.)
         if not self.exists:
             self.error("error during transfer")
             raise (Exception("Target doesn't exist after transfer, something went wrong."))
 
-        # if args.buffer and  args.ssh_target!="local":
-        #     cmd.append("|mbuffer -m {}".format(args.buffer))
-
-    def transfer_snapshot(self, target_snapshot, features, prev_snapshot=None, show_progress=False,
-                          filter_properties=None, set_properties=None, ignore_recv_exit_code=False, resume_token=None,
-                          raw=False):
-        """transfer this snapshot to target_snapshot. specify prev_snapshot for incremental transfer
+    def transfer_snapshot(self, target_snapshot, features, prev_snapshot, show_progress,
+                          filter_properties, set_properties, ignore_recv_exit_code, resume_token,
+                          raw, send_properties, write_embedded, send_pipes, recv_pipes):
+        """transfer this snapshot to target_snapshot. specify prev_snapshot for
+        incremental transfer
 
         connects a send_pipe() to recv_pipe()
+
+        Args:
+            :type send_pipes: list of str
+            :type recv_pipes: list of str
+            :type target_snapshot: ZfsDataset
+            :type features: list of str
+            :type prev_snapshot: ZfsDataset
+            :type show_progress: bool
+            :type filter_properties: list of str
+            :type set_properties: list of str
+            :type ignore_recv_exit_code: bool
+            :type resume_token: str
+            :type raw: bool
         """
 
         if set_properties is None:
@@ -525,9 +673,9 @@ class ZfsDataset:
 
         # do it
         pipe = self.send_pipe(features=features, show_progress=show_progress, prev_snapshot=prev_snapshot,
-                              resume_token=resume_token, raw=raw)
+                              resume_token=resume_token, raw=raw, send_properties=send_properties, write_embedded=write_embedded, send_pipes=send_pipes)
         target_snapshot.recv_pipe(pipe, features=features, filter_properties=filter_properties,
-                                  set_properties=set_properties, ignore_exit_code=ignore_recv_exit_code)
+                                  set_properties=set_properties, ignore_exit_code=ignore_recv_exit_code, recv_pipes=recv_pipes)
 
     def abort_resume(self):
         """abort current resume state"""
@@ -543,7 +691,12 @@ class ZfsDataset:
                 return
 
     def get_resume_snapshot(self, resume_token):
-        """returns snapshot that will be resumed by this resume token (run this on source with target-token)"""
+        """returns snapshot that will be resumed by this resume token (run this
+        on source with target-token)
+
+        Args:
+            :type resume_token: str
+        """
         # use zfs send -n option to determine this
         # NOTE: on smartos stderr, on linux stdout
         (stdout, stderr) = self.zfs_node.run(["zfs", "send", "-t", resume_token, "-n", "-v"], valid_exitcodes=[0, 255],
@@ -563,11 +716,16 @@ class ZfsDataset:
         return None
 
     def thin_list(self, keeps=None, ignores=None):
-        """determines list of snapshots that should be kept or deleted based on the thinning schedule. cull the herd!
-        keep: list of snapshots to always keep (usually the last) ignores: snapshots to completely ignore (usually
-        incompatible target snapshots that are going to be destroyed anyway)
+        """determines list of snapshots that should be kept or deleted based on
+        the thinning schedule. cull the herd!
 
         returns: ( keeps, obsoletes )
+
+        Args:
+            :param keeps: list of snapshots to always keep (usually the last)
+            :param ignores: snapshots to completely ignore (usually incompatible target snapshots that are going to be destroyed anyway)
+            :type keeps: list of ZfsDataset
+            :type ignores: list of ZfsDataset
         """
 
         if ignores is None:
@@ -577,10 +735,14 @@ class ZfsDataset:
 
         snapshots = [snapshot for snapshot in self.our_snapshots if snapshot not in ignores]
 
-        return self.zfs_node.thinner.thin(snapshots, keep_objects=keeps)
+        return self.zfs_node.thin(snapshots, keep_objects=keeps)
 
     def thin(self, skip_holds=False):
-        """destroys snapshots according to thin_list, except last snapshot"""
+        """destroys snapshots according to thin_list, except last snapshot
+
+        Args:
+            :type skip_holds: bool
+        """
 
         (keeps, obsoletes) = self.thin_list(keeps=self.our_snapshots[-1:])
         for obsolete in obsoletes:
@@ -591,8 +753,11 @@ class ZfsDataset:
                 self.snapshots.remove(obsolete)
 
     def find_common_snapshot(self, target_dataset):
-        """find latest common snapshot between us and target
-        returns None if its an initial transfer
+        """find latest common snapshot between us and target returns None if its
+        an initial transfer
+
+        Args:
+            :type target_dataset: ZfsDataset
         """
         if not target_dataset.snapshots:
             # target has nothing yet
@@ -609,27 +774,39 @@ class ZfsDataset:
             target_dataset.error("Cant find common snapshot with source.")
             raise (Exception("You probably need to delete the target dataset to fix this."))
 
-    def find_start_snapshot(self, common_snapshot, other_snapshots):
-        """finds first snapshot to send"""
+    def find_start_snapshot(self, common_snapshot, also_other_snapshots):
+        """finds first snapshot to send :rtype: ZfsDataset or None if we cant
+        find it.
+
+        Args:
+            :type common_snapshot: ZfsDataset
+            :type also_other_snapshots: bool
+        """
 
         if not common_snapshot:
             if not self.snapshots:
                 start_snapshot = None
             else:
-                # start from beginning
+                # no common snapshot, start from beginning
                 start_snapshot = self.snapshots[0]
 
-                if not start_snapshot.is_ours() and not other_snapshots:
+                if not start_snapshot.is_ours() and not also_other_snapshots:
                     # try to start at a snapshot thats ours
-                    start_snapshot = self.find_next_snapshot(start_snapshot, other_snapshots)
+                    start_snapshot = self.find_next_snapshot(start_snapshot, also_other_snapshots)
         else:
-            start_snapshot = self.find_next_snapshot(common_snapshot, other_snapshots)
+            # normal situation: start_snapshot is the one after the common snapshot
+            start_snapshot = self.find_next_snapshot(common_snapshot, also_other_snapshots)
 
         return start_snapshot
 
     def find_incompatible_snapshots(self, common_snapshot):
-        """returns a list of snapshots that is incompatible for a zfs recv onto the common_snapshot.
-        all direct followup snapshots with written=0 are compatible."""
+        """returns a list of snapshots that is incompatible for a zfs recv onto
+        the common_snapshot. all direct followup snapshots with written=0 are
+        compatible.
+
+        Args:
+            :type common_snapshot: ZfsDataset
+        """
 
         ret = []
 
@@ -643,7 +820,12 @@ class ZfsDataset:
         return ret
 
     def get_allowed_properties(self, filter_properties, set_properties):
-        """only returns lists of allowed properties for this dataset type"""
+        """only returns lists of allowed properties for this dataset type
+
+        Args:
+            :type filter_properties: list of str
+            :type set_properties: list of str
+        """
 
         allowed_filter_properties = []
         allowed_set_properties = []
@@ -659,50 +841,40 @@ class ZfsDataset:
 
         return allowed_filter_properties, allowed_set_properties
 
-    def sync_snapshots(self, target_dataset, features, show_progress=False, filter_properties=None, set_properties=None,
-                       ignore_recv_exit_code=False, holds=True, rollback=False, raw=False, other_snapshots=False,
-                       no_send=False, destroy_incompatible=False):
-        """sync this dataset's snapshots to target_dataset, while also thinning out old snapshots along the way."""
+    def _add_virtual_snapshots(self, source_dataset, source_start_snapshot, also_other_snapshots):
+        """add snapshots from source to our snapshot list. (just the in memory
+        list, no disk operations)
 
-        if set_properties is None:
-            set_properties = []
-        if filter_properties is None:
-            filter_properties = []
+        Args:
+            :type source_dataset: ZfsDataset
+            :type source_start_snapshot: ZfsDataset
+            :type also_other_snapshots: bool
+        """
 
-        # determine common and start snapshot
-        target_dataset.debug("Determining start snapshot")
-        common_snapshot = self.find_common_snapshot(target_dataset)
-        start_snapshot = self.find_start_snapshot(common_snapshot, other_snapshots)
-        # should be destroyed before attempting zfs recv:
-        incompatible_target_snapshots = target_dataset.find_incompatible_snapshots(common_snapshot)
-
-        # make target snapshot list the same as source, by adding virtual non-existing ones to the list.
-        target_dataset.debug("Creating virtual target snapshots")
-        source_snapshot = start_snapshot
-        while source_snapshot:
-            # create virtual target snapshot
-            virtual_snapshot = ZfsDataset(target_dataset.zfs_node,
-                                          target_dataset.filesystem_name + "@" + source_snapshot.snapshot_name,
+        self.debug("Creating virtual target snapshots")
+        snapshot = source_start_snapshot
+        while snapshot:
+            # create virtual target snapsho
+            # NOTE: with force_exist we're telling the dataset it doesnt exist yet. (e.g. its virtual)
+            virtual_snapshot = ZfsDataset(self.zfs_node,
+                                          self.filesystem_name + "@" + snapshot.snapshot_name,
                                           force_exists=False)
-            target_dataset.snapshots.append(virtual_snapshot)
-            source_snapshot = self.find_next_snapshot(source_snapshot, other_snapshots)
+            self.snapshots.append(virtual_snapshot)
+            snapshot = source_dataset.find_next_snapshot(snapshot, also_other_snapshots)
 
-        # now let thinner decide what we want on both sides as final state (after all transfers are done)
-        if self.our_snapshots:
-            self.debug("Create thinning list")
-            (source_keeps, source_obsoletes) = self.thin_list(keeps=[self.our_snapshots[-1]])
-        else:
-            source_obsoletes = []
+    def _pre_clean(self, common_snapshot, target_dataset, source_obsoletes, target_obsoletes, target_keeps):
+        """cleanup old stuff before starting snapshot syncing
 
-        if target_dataset.our_snapshots:
-            (target_keeps, target_obsoletes) = target_dataset.thin_list(keeps=[target_dataset.our_snapshots[-1]],
-                                                                        ignores=incompatible_target_snapshots)
-        else:
-            target_keeps = []
-            target_obsoletes = []
+        Args:
+            :type common_snapshot: ZfsDataset
+            :type target_dataset: ZfsDataset
+            :type source_obsoletes: list of ZfsDataset
+            :type target_obsoletes: list of ZfsDataset
+            :type target_keeps: list of ZfsDataset
+        """
 
-        # on source: destroy all obsoletes before common. but after common, only delete snapshots that target also
-        # doesn't want to explicitly keep
+        # on source: destroy all obsoletes before common.
+        # But after common, only delete snapshots that target also doesn't want
         before_common = True
         for source_snapshot in self.snapshots:
             if common_snapshot and source_snapshot.snapshot_name == common_snapshot.snapshot_name:
@@ -720,12 +892,14 @@ class ZfsDataset:
                 if target_snapshot.exists:
                     target_snapshot.destroy()
 
-        # now actually transfer the snapshots, if we want
-        if no_send:
-            return
+    def _validate_resume_token(self, target_dataset, start_snapshot):
+        """validate and get (or destory) resume token
+
+        Args:
+            :type target_dataset: ZfsDataset
+            :type start_snapshot: ZfsDataset
+        """
 
-        # resume?
-        resume_token = None
         if 'receive_resume_token' in target_dataset.properties:
             resume_token = target_dataset.properties['receive_resume_token']
             # not valid anymore?
@@ -733,9 +907,48 @@ class ZfsDataset:
             if not resume_snapshot or start_snapshot.snapshot_name != resume_snapshot.snapshot_name:
                 target_dataset.verbose("Cant resume, resume token no longer valid.")
                 target_dataset.abort_resume()
-                resume_token = None
+            else:
+                return resume_token
+
+    def _plan_sync(self, target_dataset, also_other_snapshots):
+        """plan where to start syncing and what to sync and what to keep
+
+        Args:
+            :rtype: ( ZfsDataset, ZfsDataset, list of ZfsDataset, list of ZfsDataset, list of ZfsDataset, list of ZfsDataset )
+            :type target_dataset: ZfsDataset
+            :type also_other_snapshots: bool
+        """
+
+        # determine common and start snapshot
+        target_dataset.debug("Determining start snapshot")
+        common_snapshot = self.find_common_snapshot(target_dataset)
+        start_snapshot = self.find_start_snapshot(common_snapshot, also_other_snapshots)
+        incompatible_target_snapshots = target_dataset.find_incompatible_snapshots(common_snapshot)
+
+        # let thinner decide whats obsolete on source
+        source_obsoletes = []
+        if self.our_snapshots:
+            source_obsoletes = self.thin_list(keeps=[self.our_snapshots[-1]])[1]
+
+        # let thinner decide keeps/obsoletes on target, AFTER the transfer would be done (by using virtual snapshots)
+        target_dataset._add_virtual_snapshots(self, start_snapshot, also_other_snapshots)
+        target_keeps = []
+        target_obsoletes = []
+        if target_dataset.our_snapshots:
+            (target_keeps, target_obsoletes) = target_dataset.thin_list(keeps=[target_dataset.our_snapshots[-1]],
+                                                                        ignores=incompatible_target_snapshots)
+
+        return common_snapshot, start_snapshot, source_obsoletes, target_obsoletes, target_keeps, incompatible_target_snapshots
+
+    def handle_incompatible_snapshots(self, incompatible_target_snapshots, destroy_incompatible):
+        """destroy incompatbile snapshots on target before sync, or inform user
+        what to do
+
+        Args:
+            :type incompatible_target_snapshots: list of ZfsDataset
+            :type destroy_incompatible: bool
+        """
 
-        # incompatible target snapshots?
         if incompatible_target_snapshots:
             if not destroy_incompatible:
                 for snapshot in incompatible_target_snapshots:
@@ -745,12 +958,80 @@ class ZfsDataset:
                 for snapshot in incompatible_target_snapshots:
                     snapshot.verbose("Incompatible snapshot")
                     snapshot.destroy()
-                    target_dataset.snapshots.remove(snapshot)
+                    self.snapshots.remove(snapshot)
+
+
+    def sync_snapshots(self, target_dataset, features, show_progress, filter_properties, set_properties,
+                       ignore_recv_exit_code, holds, rollback, decrypt, encrypt, also_other_snapshots,
+                       no_send, destroy_incompatible, send_pipes, recv_pipes):
+        """sync this dataset's snapshots to target_dataset, while also thinning
+        out old snapshots along the way.
+
+        Args:
+            :type send_pipes: list of str
+            :type recv_pipes: list of str
+            :type target_dataset: ZfsDataset
+            :type features: list of str
+            :type show_progress: bool
+            :type filter_properties: list of str
+            :type set_properties: list of str
+            :type ignore_recv_exit_code: bool
+            :type holds: bool
+            :type rollback: bool
+            :type decrypt: bool
+            :type also_other_snapshots: bool
+            :type no_send: bool
+            :type destroy_incompatible: bool
+        """
+
+        (common_snapshot, start_snapshot, source_obsoletes, target_obsoletes, target_keeps,
+         incompatible_target_snapshots) = \
+            self._plan_sync(target_dataset=target_dataset, also_other_snapshots=also_other_snapshots)
+
+        # NOTE: we do this because we dont want filesystems to fillup when backups keep failing.
+        # Also usefull with no_send to still cleanup stuff.
+        self._pre_clean(
+            common_snapshot=common_snapshot, target_dataset=target_dataset,
+            target_keeps=target_keeps, target_obsoletes=target_obsoletes, source_obsoletes=source_obsoletes)
+
+        # handle incompatible stuff on target
+        target_dataset.handle_incompatible_snapshots(incompatible_target_snapshots, destroy_incompatible)
+
+        # now actually transfer the snapshots, if we want
+        if no_send:
+            return
+
+        # check if we can resume
+        resume_token = self._validate_resume_token(target_dataset, start_snapshot)
 
         # rollback target to latest?
         if rollback:
             target_dataset.rollback()
 
+        #defaults for these settings if there is no encryption stuff going on:
+        send_properties = True
+        raw = False
+        write_embedded = True
+
+        (active_filter_properties, active_set_properties) = self.get_allowed_properties(filter_properties, set_properties)
+
+        # source dataset encrypted?
+        if self.properties.get('encryption', 'off')!='off':
+            # user wants to send it over decrypted?
+            if decrypt:
+                # when decrypting, zfs cant send properties
+                send_properties=False
+            else:
+                # keep data encrypted by sending it raw (including properties)
+                raw=True
+
+        # encrypt at target?
+        if encrypt and not raw:
+            # filter out encryption properties to let encryption on the target take place
+            active_filter_properties.extend(["keylocation","pbkdf2iters","keyformat", "encryption"])
+            write_embedded=False
+
+
         # now actually transfer the snapshots
         prev_source_snapshot = common_snapshot
         source_snapshot = start_snapshot
@@ -759,15 +1040,14 @@ class ZfsDataset:
 
             # does target actually want it?
             if target_snapshot not in target_obsoletes:
-                # NOTE: should we let transfer_snapshot handle this?
-                (allowed_filter_properties, allowed_set_properties) = self.get_allowed_properties(filter_properties,
-                                                                                                  set_properties)
+
                 source_snapshot.transfer_snapshot(target_snapshot, features=features,
                                                   prev_snapshot=prev_source_snapshot, show_progress=show_progress,
-                                                  filter_properties=allowed_filter_properties,
-                                                  set_properties=allowed_set_properties,
+                                                  filter_properties=active_filter_properties,
+                                                  set_properties=active_set_properties,
                                                   ignore_recv_exit_code=ignore_recv_exit_code,
-                                                  resume_token=resume_token, raw=raw)
+                                                  resume_token=resume_token, write_embedded=write_embedded, raw=raw, send_properties=send_properties, send_pipes=send_pipes, recv_pipes=recv_pipes)
+
                 resume_token = None
 
                 # hold the new common snapshots and release the previous ones
@@ -784,8 +1064,8 @@ class ZfsDataset:
                 if prev_source_snapshot in source_obsoletes:
                     prev_source_snapshot.destroy()
 
-                    # destroy the previous target snapshot if obsolete (usually this is only the common_snapshot,
-                    # the rest was already destroyed or will not be send)
+                # destroy the previous target snapshot if obsolete (usually this is only the common_snapshot,
+                # the rest was already destroyed or will not be send)
                 prev_target_snapshot = target_dataset.find_snapshot(prev_source_snapshot)
                 if prev_target_snapshot in target_obsoletes:
                     prev_target_snapshot.destroy()
@@ -799,4 +1079,4 @@ class ZfsDataset:
                     target_dataset.abort_resume()
                     resume_token = None
 
-            source_snapshot = self.find_next_snapshot(source_snapshot, other_snapshots)
+            source_snapshot = self.find_next_snapshot(source_snapshot, also_other_snapshots)

zfs_autobackup/ZfsNode.py

@@ -10,18 +10,16 @@ from zfs_autobackup.Thinner import Thinner
 from zfs_autobackup.CachedProperty import CachedProperty
 from zfs_autobackup.ZfsPool import ZfsPool
 from zfs_autobackup.ZfsDataset import ZfsDataset
+from zfs_autobackup.ExecuteNode import ExecuteError
 
 
 class ZfsNode(ExecuteNode):
     """a node that contains zfs datasets. implements global (systemwide/pool wide) zfs commands"""
 
     def __init__(self, backup_name, logger, ssh_config=None, ssh_to=None, readonly=False, description="",
-                 debug_output=False, thinner=Thinner()):
+                 debug_output=False, thinner=None):
         self.backup_name = backup_name
-        if not description and ssh_to:
-            self.description = ssh_to
-        else:
-            self.description = description
+        self.description = description
 
         self.logger = logger
 
@@ -33,14 +31,15 @@ class ZfsNode(ExecuteNode):
         else:
             self.verbose("Datasets are local")
 
-        rules = thinner.human_rules()
-        if rules:
-            for rule in rules:
-                self.verbose(rule)
-        else:
-            self.verbose("Keep no old snaphots")
+        if thinner is not None:
+            rules = thinner.human_rules()
+            if rules:
+                for rule in rules:
+                    self.verbose(rule)
+            else:
+                self.verbose("Keep no old snaphots")
 
-        self.thinner = thinner
+        self.__thinner = thinner
 
         # list of ZfsPools
         self.__pools = {}
@@ -50,6 +49,12 @@ class ZfsNode(ExecuteNode):
 
         ExecuteNode.__init__(self, ssh_config=ssh_config, ssh_to=ssh_to, readonly=readonly, debug_output=debug_output)
 
+    def thin(self, objects, keep_objects):
+        if self.__thinner is not None:
+            return self.__thinner.thin(objects, keep_objects)
+        else:
+            return ( keep_objects, [] )
+
     @CachedProperty
     def supported_send_options(self):
         """list of supported options, for optimizing sends"""
@@ -77,7 +82,7 @@ class ZfsNode(ExecuteNode):
 
         try:
             self.run(cmd, hide_errors=True, valid_exitcodes=[0, 1])
-        except subprocess.CalledProcessError:
+        except ExecuteError:
             return False
 
         return True
@@ -115,7 +120,7 @@ class ZfsNode(ExecuteNode):
                     self._progress_total_bytes = int(progress_fields[2])
                 elif progress_fields[0] == 'incremental':
                     self._progress_total_bytes = int(progress_fields[3])
-                else:
+                elif progress_fields[1].isnumeric():
                     bytes_ = int(progress_fields[1])
                     if self._progress_total_bytes:
                         percentage = min(100, int(bytes_ * 100 / self._progress_total_bytes))
@@ -123,9 +128,8 @@ class ZfsNode(ExecuteNode):
                         bytes_left = self._progress_total_bytes - bytes_
                         minutes_left = int((bytes_left / (bytes_ / (time.time() - self._progress_start_time))) / 60)
 
-                        print(">>> {}% {}MB/s (total {}MB, {} minutes left)     \r".format(percentage, speed, int(
-                            self._progress_total_bytes / (1024 * 1024)), minutes_left), end='', file=sys.stderr)
-                        sys.stderr.flush()
+                        self.logger.progress("Transfer {}% {}MB/s (total {}MB, {} minutes left)".format(percentage, speed, int(
+                            self._progress_total_bytes / (1024 * 1024)), minutes_left))
 
             return
 
@@ -135,8 +139,8 @@ class ZfsNode(ExecuteNode):
         else:
             self.error(prefix + line.rstrip())
 
-    def _parse_stderr_pipe(self, line, hide_errors):
-        self.parse_zfs_progress(line, hide_errors, "STDERR|> ")
+    # def _parse_stderr_pipe(self, line, hide_errors):
+    #     self.parse_zfs_progress(line, hide_errors, "STDERR|> ")
 
     def _parse_stderr(self, line, hide_errors):
         self.parse_zfs_progress(line, hide_errors, "STDERR > ")
@@ -147,6 +151,9 @@ class ZfsNode(ExecuteNode):
     def error(self, txt):
         self.logger.error("{} {}".format(self.description, txt))
 
+    def warning(self, txt):
+        self.logger.warning("{} {}".format(self.description, txt))
+
     def debug(self, txt):
         self.logger.debug("{} {}".format(self.description, txt))
 
@@ -193,8 +200,7 @@ class ZfsNode(ExecuteNode):
             self.verbose("Creating snapshots {} in pool {}".format(snapshot_name, pool_name))
             self.run(cmd, readonly=False)
 
-    @CachedProperty
-    def selected_datasets(self):
+    def selected_datasets(self, exclude_received, exclude_paths):
         """determine filesystems that should be backupped by looking at the special autobackup-property, systemwide
 
            returns: list of ZfsDataset
@@ -204,35 +210,32 @@ class ZfsNode(ExecuteNode):
 
         # get all source filesystems that have the backup property
         lines = self.run(tab_split=True, readonly=True, cmd=[
-            "zfs", "get", "-t", "volume,filesystem", "-o", "name,value,source", "-s", "local,inherited", "-H",
+            "zfs", "get", "-t", "volume,filesystem", "-o", "name,value,source", "-H",
             "autobackup:" + self.backup_name
         ])
 
-        # determine filesystems that should be actually backupped
+        # The returnlist of selected ZfsDataset's:
         selected_filesystems = []
-        direct_filesystems = []
+
+        # list of sources, used to resolve inherited sources
+        sources = {}
+
         for line in lines:
-            (name, value, source) = line
+            (name, value, raw_source) = line
             dataset = ZfsDataset(self, name)
 
-            if value == "false":
-                dataset.verbose("Ignored (disabled)")
-
+            # "resolve" inherited sources
+            sources[name] = raw_source
+            if raw_source.find("inherited from ") == 0:
+                inherited = True
+                inherited_from = re.sub("^inherited from ", "", raw_source)
+                source = sources[inherited_from]
             else:
-                if source == "local" and (value == "true" or value == "child"):
-                    direct_filesystems.append(name)
+                inherited = False
+                source = raw_source
 
-                if source == "local" and value == "true":
-                    dataset.verbose("Selected (direct selection)")
-                    selected_filesystems.append(dataset)
-                elif source.find("inherited from ") == 0 and (value == "true" or value == "child"):
-                    inherited_from = re.sub("^inherited from ", "", source)
-                    if inherited_from in direct_filesystems:
-                        selected_filesystems.append(dataset)
-                        dataset.verbose("Selected (inherited selection)")
-                    else:
-                        dataset.debug("Ignored (already a backup)")
-                else:
-                    dataset.verbose("Ignored (only childs)")
+            # determine it
+            if dataset.is_selected(value=value, source=source, inherited=inherited, exclude_received=exclude_received, exclude_paths=exclude_paths):
+                selected_filesystems.append(dataset)
 
-        return selected_filesystems
+        return selected_filesystems

zfs_autobackup/ZfsPool.py

@@ -45,8 +45,7 @@ class ZfsPool():
         ret = {}
 
         for pair in self.zfs_node.run(tab_split=True, cmd=cmd, readonly=True, valid_exitcodes=[0]):
-            if len(pair) == 4:
-                ret[pair[1]] = pair[2]
+            ret[pair[1]] = pair[2]
 
         return ret
 

zfs_autobackup/compressors.py

@@ -0,0 +1,69 @@
+# Adopted from Syncoid :)
+
+# this software is licensed for use under the Free Software Foundation's GPL v3.0 license, as retrieved
+# from http://www.gnu.org/licenses/gpl-3.0.html on 2014-11-17.  A copy should also be available in this
+# project's Git repository at https://github.com/jimsalterjrs/sanoid/blob/master/LICENSE.
+
+COMPRESS_CMDS = {
+    'gzip': {
+        'cmd': 'gzip',
+        'args': [ '-3' ],
+        'dcmd': 'zcat',
+        'dargs': [],
+    },
+    'pigz-fast': {
+        'cmd': 'pigz',
+        'args': [ '-3' ],
+        'dcmd': 'pigz',
+        'dargs': [ '-dc' ],
+    },
+    'pigz-slow': {
+        'cmd': 'pigz',
+        'args': [ '-9' ],
+        'dcmd': 'pigz',
+        'dargs': [ '-dc' ],
+    },
+    'zstd-fast': {
+        'cmd': 'zstdmt',
+        'args': [ '-3' ],
+        'dcmd': 'zstdmt',
+        'dargs': [ '-dc' ],
+    },
+    'zstd-slow': {
+        'cmd': 'zstdmt',
+        'args': [ '-19' ],
+        'dcmd': 'zstdmt',
+        'dargs': [ '-dc' ],
+    },
+    'xz': {
+        'cmd': 'xz',
+        'args': [],
+        'dcmd': 'xz',
+        'dargs': [ '-d' ],
+    },
+    'lzo': {
+        'cmd': 'lzop',
+        'args': [],
+        'dcmd': 'lzop',
+        'dargs': [ '-dfc' ],
+    },
+    'lz4': {
+        'cmd': 'lz4',
+        'args': [],
+        'dcmd': 'lz4',
+        'dargs': [ '-dc' ],
+    },
+}
+
+def compress_cmd(compressor):
+    ret=[ COMPRESS_CMDS[compressor]['cmd'] ]
+    ret.extend( COMPRESS_CMDS[compressor]['args'])
+    return ret
+
+def decompress_cmd(compressor):
+    ret= [ COMPRESS_CMDS[compressor]['dcmd'] ]
+    ret.extend(COMPRESS_CMDS[compressor]['dargs'])
+    return ret
+
+def choices():
+    return COMPRESS_CMDS.keys()