Add metadata-based autoactivation property for VG and LV

The autoactivation property can be specified in lvcreate
or vgcreate for new LVs/VGs, and the property can be changed
by lvchange or vgchange for existing LVs/VGs.

 --setautoactivation y|n
 enables|disables autoactivation of a VG or LV.

Autoactivation is enabled by default, which is consistent with
past behavior.  The disabled state is stored as a new flag
in the VG metadata, and the absence of the flag allows
autoactivation.

If autoactivation is disabled for the VG, then no LVs in the VG
will be autoactivated (the LV autoactivation property will have
no effect.)  When autoactivation is enabled for the VG, then
autoactivation can be controlled on individual LVs.

The state of this property can be reported for LVs/VGs using
the "-o autoactivation" option in lvs/vgs commands, which will
report "enabled", or "" for the disabled state.

Previous versions of lvm do not recognize this property.  Since
autoactivation is enabled by default, the disabled setting will
have no effect in older lvm versions.  If the VG is modified by
older lvm versions, the disabled state will also be dropped from
the metadata.

The autoactivation property is an alternative to using the lvm.conf
auto_activation_volume_list, which is still applied to to VGs/LVs
in addition to the new property.

If VG or LV autoactivation is disabled either in metadata or in
auto_activation_volume_list, it will not be autoactivated.

An autoactivation command will silently skip activating an LV
when the autoactivation property is disabled.

To determine the effective autoactivation behavior for a specific
LV, multiple settings would need to be checked:
the VG autoactivation property, the LV autoactivation property,
the auto_activation_volume_list.  The "activation skip" property
would also be relevant, since it applies to both normal and auto
activation.

1 files changed, 5 insertions, 4 deletions

diff --git a/tools/command-lines.in b/tools/command-lines.in
index 528811f52..0a3359630 100644
--- a/tools/command-lines.in
+++ b/tools/command-lines.in
@@ -224,7 +224,7 @@ OO_LVCHANGE_META: --addtag Tag, --deltag Tag,
 --compression Bool, --deduplication Bool,
 --detachprofile, --metadataprofile String, --profile String,
 --permission Permission, --readahead Readahead, --setactivationskip Bool,
---errorwhenfull Bool, --discards Discards, --zero Bool,
+--setautoactivation Bool, --errorwhenfull Bool, --discards Discards, --zero Bool,
 --cachemode CacheMode, --cachepolicy String, --cachesettings String,
 --minrecoveryrate SizeKB, --maxrecoveryrate SizeKB,
 --writebehind Number, --writemostly WriteMostlyPV, --persistent n
@@ -799,7 +799,7 @@ OO_LVCREATE: --addtag Tag, --alloc Alloc, --autobackup Bool, --activate Active,
 --metadataprofile String, --minor Number, --monitor Bool, --name String, --nosync,
 --noudevsync, --permission Permission, --persistent Bool, --readahead Readahead,
 --reportformat ReportFmt, --setactivationskip Bool, --wipesignatures Bool,
---zero Bool
+--zero Bool, --setautoactivation Bool
 
 OO_LVCREATE_CACHE: --cachemode CacheMode, --cachepolicy String, --cachesettings String,
 --chunksize SizeKB, --cachemetadataformat CacheMetadataFormat
@@ -1662,7 +1662,8 @@ OO_VGCHANGE_META: --addtag Tag, --deltag Tag,
 --logicalvolume Uint32, --maxphysicalvolumes Uint32, --alloc Alloc, --uuid,
 --pvmetadatacopies MetadataCopiesPV, --vgmetadatacopies MetadataCopiesVG,
 --physicalextentsize SizeMB, --resizeable Bool,
---profile String, --detachprofile, --metadataprofile String
+--profile String, --detachprofile, --metadataprofile String,
+--setautoactivation Bool
 
 vgchange OO_VGCHANGE_META
 OO: --poll Bool, OO_VGCHANGE
@@ -1742,7 +1743,7 @@ OO: --addtag Tag, --alloc Alloc, --autobackup Bool, --clustered Bool, --maxlogic
 --physicalextentsize SizeMB, --force, --zero Bool, --labelsector Number,
 --metadatasize SizeMB, --pvmetadatacopies MetadataCopiesPV, --vgmetadatacopies MetadataCopiesVG,
 --reportformat ReportFmt, --dataalignment SizeKB, --dataalignmentoffset SizeKB,
---shared, --systemid String, --locktype LockType
+--shared, --systemid String, --locktype LockType, --setautoactivation Bool
 ID: vgcreate_general
 
 ---