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Code Releases Activity

Thin segment transaction_id moved

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Add a new node flag send_messages that is used to simplify
test when to call _node_send_messages().

Add call to _node_send_messages when pool is deeper in the tree.
This commit is contained in:
Zdenek Kabelac 2011-10-30 22:04:57 +00:00
parent f0df05e1dd
commit bbcd37e4b8
1 changed files with 27 additions and 13 deletions
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40
libdm/libdm-deptree.c
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@ -170,6 +170,7 @@ struct load_segment {
struct dm_tree_node *metadata; /* Thin_pool */
struct dm_tree_node *pool; /* Thin_pool, Thin */
struct dm_list thin_messages; /* Thin_pool */
uint64_t transaction_id; /* Thin_pool */
uint64_t low_water_mark; /* Thin_pool */
uint32_t data_block_size; /* Thin_pool */
unsigned skip_block_zeroing; /* Thin_pool */
@ -186,8 +187,6 @@ struct load_properties {
uint32_t read_ahead;
uint32_t read_ahead_flags;
uint64_t thin_pool_transaction_id; /* Thin_pool */
unsigned segment_count;
unsigned size_changed;
struct dm_list segs;
@ -209,6 +208,9 @@ struct load_properties {
* avoid starting the mirror resync operation too early.
*/
unsigned delay_resume_if_new;
/* Send messages for this node in preload */
unsigned send_messages;
};
/* Two of these used to join two nodes with uses and used_by. */
@ -1335,8 +1337,7 @@ static int _node_send_messages(struct dm_tree_node *dnode,
uint64_t trans_id;
const char *uuid;
if ((dnode == &dnode->dtree->root) || /* root has props.segs uninitialized */
!dnode->info.exists || (dm_list_size(&dnode->props.segs) != 1))
if (!dnode->info.exists || (dm_list_size(&dnode->props.segs) != 1))
return 1;
seg = dm_list_item(dm_list_last(&dnode->props.segs), struct load_segment);
@ -1352,22 +1353,28 @@ static int _node_send_messages(struct dm_tree_node *dnode,
}
if (!_thin_pool_status_transaction_id(dnode, &trans_id))
return_0;
goto_bad;
if (trans_id == dnode->props.thin_pool_transaction_id)
if (trans_id == seg->transaction_id)
return 1; /* In sync - skip messages */
if (trans_id != (dnode->props.thin_pool_transaction_id - 1)) {
if (trans_id != (seg->transaction_id - 1)) {
log_error("Thin pool transaction_id=%" PRIu64 ", while expected: %" PRIu64 ".",
trans_id, dnode->props.thin_pool_transaction_id - 1);
return 0; /* Nothing to send */
trans_id, seg->transaction_id - 1);
goto bad; /* Nothing to send */
}
dm_list_iterate_items(tmsg, &seg->thin_messages)
if (!(_thin_pool_node_message(dnode, tmsg)))
return_0;
goto_bad;
return 1;
bad:
/* Try to deactivate */
if (!(dm_tree_deactivate_children(dnode, uuid_prefix, uuid_prefix_len)))
log_error("Failed to deactivate %s", dnode->name);
return 0;
}
/*
@ -2315,7 +2322,11 @@ int dm_tree_preload_children(struct dm_tree_node *dnode,
/* Update cached info */
child->info = newinfo;
if (child->props.send_messages &&
!(r = _node_send_messages(child, uuid_prefix, uuid_prefix_len))) {
stack;
continue;
}
/*
* Prepare for immediate synchronization with udev and flush all stacked
* dev node operations if requested by immediate_dev_node property. But
@ -2325,7 +2336,9 @@ int dm_tree_preload_children(struct dm_tree_node *dnode,
update_devs_flag = 1;
}
handle = NULL;
if (r && dnode->props.send_messages &&
!(r = _node_send_messages(dnode, uuid_prefix, uuid_prefix_len)))
stack;
if (update_devs_flag) {
if (!dm_udev_wait(dm_tree_get_cookie(dnode)))
@ -2875,7 +2888,8 @@ int dm_tree_node_add_thin_pool_target(struct dm_tree_node *node,
if (!_link_tree_nodes(node, seg->pool))
return_0;
node->props.thin_pool_transaction_id = transaction_id; // compare on resume
node->props.send_messages = 1;
seg->transaction_id = transaction_id;
seg->low_water_mark = low_water_mark;
seg->data_block_size = data_block_size;
seg->skip_block_zeroing = skip_block_zeroing;