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| author | Zdenek Kabelac <zkabelac@redhat.com> | 2015-07-01 13:30:14 +0200 |
|---|---|---|
| committer | Zdenek Kabelac <zkabelac@redhat.com> | 2015-07-03 16:13:14 +0200 |
| commit | 5bef18f2eb1071a29b682f6f456a13a73493868e (patch) | |
| tree | a72f390042c3e61c9df7cb3dd78316ad5cb0ee33 | |
| parent | 622064f00fe41a02ab857ce02920a9e8818e610b (diff) | |
| download | lvm2-5bef18f2eb1071a29b682f6f456a13a73493868e.tar.gz | |
libdm: support for posting messages in suspend
Add support for sending message in suspend tree for thin-pools.
When this operation is requested whole subtree suspend is then skipped.
This is experimantal support for new lvm2 code for sending message
in suspend phase where 'thin-pool origin-only suspend' will send
messages instead of really suspending thin-pool tree.
When suspening thin volume origin-only - only thin volume is suspended,
then messages are posted and thin-pool suspend is skipped.
| -rw-r--r-- | WHATS_NEW_DM | 1 | ||||
| -rw-r--r-- | libdm/libdm-deptree.c | 18 |
2 files changed, 19 insertions, 0 deletions
diff --git a/WHATS_NEW_DM b/WHATS_NEW_DM index 5e1f25fec..f4537d9e2 100644 --- a/WHATS_NEW_DM +++ b/WHATS_NEW_DM @@ -1,5 +1,6 @@ Version 1.02.101 - ================================= + Add experimental support to passing messages in suspend tree. Add dm_report_value_cache_{set,get} to support caching during report/select. Add dm_report_reserved_handler to handle report reserved value actions. Support dynamic value in select: DM_REPORT_FIELD_RESERVED_VALUE_DYNAMIC_VALUE. diff --git a/libdm/libdm-deptree.c b/libdm/libdm-deptree.c index e344d1aaf..b9a858215 100644 --- a/libdm/libdm-deptree.c +++ b/libdm/libdm-deptree.c @@ -243,6 +243,8 @@ struct load_properties { /* Send messages for this node in preload */ unsigned send_messages; + /* Skip suspending node's children, used when sending messages to thin-pool */ + int skip_suspend; }; /* Two of these used to join two nodes with uses and used_by. */ @@ -1768,6 +1770,19 @@ int dm_tree_suspend_children(struct dm_tree_node *dnode, !info.exists || info.suspended) continue; + /* If child has some real messages send them */ + if ((child->props.send_messages > 1) && r) { + if (!(r = _node_send_messages(child, uuid_prefix, uuid_prefix_len, 1))) + stack; + else { + log_debug_activation("Sent messages to thin-pool %s." + "skipping suspend of its children.", + _node_name(child)); + child->props.skip_suspend++; + } + continue; + } + if (!_suspend_node(name, info.major, info.minor, child->dtree->skip_lockfs, child->dtree->no_flush, &newinfo)) { @@ -1786,6 +1801,9 @@ int dm_tree_suspend_children(struct dm_tree_node *dnode, handle = NULL; while ((child = dm_tree_next_child(&handle, dnode, 0))) { + if (child->props.skip_suspend) + continue; + if (!(uuid = dm_tree_node_get_uuid(child))) { stack; continue; |