third-party-mirrors/zfs_autobackup
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This commit is contained in:
Edwin Eefting 2019-10-28 13:25:21 +01:00
parent 3fd80c9307
commit d80a636b12
1 changed files with 50 additions and 12 deletions
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62
zfs_autobackup
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@ -570,8 +570,8 @@ class ZfsDataset():
raise(Exception("Please call this on a dataset."))
try:
index=self.our_snapshots.index(snapshot)
if index>0:
index=self.find_our_snapshot_index(snapshot)
if index!=None and index>0:
return(self.our_snapshots[index-1])
else:
return(None)
@ -586,8 +586,8 @@ class ZfsDataset():
raise(Exception("Please call this on a dataset."))
try:
index=self.our_snapshots.index(snapshot)
if index>=0 and index<len(self.our_snapshots)-1:
index=self.find_our_snapshot_index(snapshot)
if index!=None and index>=0 and index<len(self.our_snapshots)-1:
return(self.our_snapshots[index+1])
else:
return(None)
@ -667,11 +667,13 @@ class ZfsDataset():
def hold(self):
"""hold dataset"""
self.zfs_node.run([ "zfs" , "hold", "autobackup:"+self.zfs_node.backup_name, self.name ])
self.debug("holding")
self.zfs_node.run([ "zfs" , "hold", "autobackup:"+self.zfs_node.backup_name, self.name ], valid_exitcodes=[ 0,1 ])
def release(self):
"""release dataset"""
self.zfs_node.run([ "zfs" , "release", "autobackup:"+self.zfs_node.backup_name, self.name ])
self.debug("releasing")
self.zfs_node.run([ "zfs" , "release", "autobackup:"+self.zfs_node.backup_name, self.name ], valid_exitcodes=[ 0,1 ])
@ -721,12 +723,14 @@ class ZfsDataset():
return(ret)
# def progressive_thinning(self, schedule):
# """cleanup snapshots by progressive thinning schedule"""
def find_snapshot(self, snapshot):
"""find snapshot by snapshot (can be a snapshot_name or ZfsDataset)"""
if isinstance(snapshot,str):
snapshot_name=snapshot
else:
snapshot_name=snapshot.snapshot_name
def find_snapshot(self, snapshot_name):
"""find snapshot by snapshot_name"""
for snapshot in self.our_snapshots:
if snapshot.snapshot_name==snapshot_name:
return(snapshot)
@ -734,6 +738,23 @@ class ZfsDataset():
return(None)
def find_our_snapshot_index(self, snapshot):
"""find our snapshot index by snapshot (can be a snapshot_name or ZfsDataset)"""
if isinstance(snapshot,str):
snapshot_name=snapshot
else:
snapshot_name=snapshot.snapshot_name
index=0
for snapshot in self.our_snapshots:
if snapshot.snapshot_name==snapshot_name:
return(index)
index=index+1
return(None)
@cached_property
def is_changed_ours(self):
"""dataset is changed since OUR latest snapshot?"""
@ -948,10 +969,20 @@ class ZfsDataset():
#if something is resumed, fix the holds at this point
if resumed:
#hold the current commons, relase the previous ones
common_snapshot.hold()
target_dataset.find_snapshot(common_snapshot.snapshot_name).hold()
target_dataset.find_snapshot(common_snapshot).hold()
prev_target_snapshot=target_dataset.find_our_prev_snapshot(common_snapshot)
if prev_target_snapshot:
prev_target_snapshot.release()
prev_source_snapshot=self.find_snapshot(prev_target_snapshot)
if prev_source_snapshot:
prev_source_snapshot.release()
#create virtual target snapshots
target_dataset.debug("Creating virtual target snapshots")
@ -993,6 +1024,13 @@ class ZfsDataset():
if target_snapshot in target_keeps:
source_snapshot.transfer_snapshot(target_snapshot, prev_snapshot=prev_source_snapshot, show_progress=show_progress, resume=resume, filter_properties=filter_properties, set_properties=set_properties, ignore_recv_exit_code=ignore_recv_exit_code)
#hold the new common snapshots and release the previous ones
target_snapshot.hold()
source_snapshot.hold()
if prev_source_snapshot:
prev_source_snapshot.release()
target_dataset.find_snapshot(prev_source_snapshot.snapshot_name)
#we may destroy the previous snapshot now, if we dont want it anymore
if prev_source_snapshot and (prev_source_snapshot not in source_keeps):
prev_source_snapshot.destroy()