From 4a4ea47f709287444f3b0d8e0581ce17e730ef4c Mon Sep 17 00:00:00 2001 From: Zdenek Kabelac Date: Wed, 6 Dec 2017 13:23:37 +0100 Subject: [PATCH] libdm: add help func _get_last_load_segment Share code for same functionality. --- libdm/libdm-deptree.c | 40 ++++++++++++++++++++++++---------------- 1 file changed, 24 insertions(+), 16 deletions(-) diff --git a/libdm/libdm-deptree.c b/libdm/libdm-deptree.c index 1ef1700fe..ef5da59e0 100644 --- a/libdm/libdm-deptree.c +++ b/libdm/libdm-deptree.c @@ -1485,6 +1485,16 @@ out: return r; } +static struct load_segment *_get_last_load_segment(struct dm_tree_node *node) +{ + if (dm_list_empty(&node->props.segs)) { + log_error("Node %s is missing a segment.", _node_name(node)); + return NULL; + } + + return dm_list_item(dm_list_last(&node->props.segs), struct load_segment); +} + /* For preload pass only validate pool's transaction_id */ static int _node_send_messages(struct dm_tree_node *dnode, const char *uuid_prefix, @@ -1497,10 +1507,12 @@ static int _node_send_messages(struct dm_tree_node *dnode, const char *uuid; int have_messages; - if (!dnode->info.exists || (dm_list_size(&dnode->props.segs) != 1)) + if (!dnode->info.exists) return 1; - seg = dm_list_item(dm_list_last(&dnode->props.segs), struct load_segment); + if (!(seg = _get_last_load_segment(dnode))) + return_0; + if (seg->type != SEG_THIN_POOL) return 1; @@ -3146,12 +3158,8 @@ int dm_tree_node_add_mirror_target_log(struct dm_tree_node *node, struct dm_tree_node *log_node = NULL; struct load_segment *seg; - if (!node->props.segment_count) { - log_error(INTERNAL_ERROR "Attempt to add target area to missing segment."); - return 0; - } - - seg = dm_list_item(dm_list_last(&node->props.segs), struct load_segment); + if (!(seg = _get_last_load_segment(node))) + return_0; if (log_uuid) { if (!(seg->uuid = dm_pool_strdup(node->dtree->mem, log_uuid))) { @@ -3429,13 +3437,16 @@ static struct load_segment *_get_single_load_segment(struct dm_tree_node *node, { struct load_segment *seg; + if (!(seg = _get_last_load_segment(node))) + return_NULL; + + /* Never used past _load_node(), so can test segment_count */ if (node->props.segment_count != 1) { log_error("Node %s must have only one segment.", _dm_segtypes[type].target); return NULL; } - seg = dm_list_item(dm_list_last(&node->props.segs), struct load_segment); if (seg->type != type) { log_error("Node %s has segment type %s.", _dm_segtypes[type].target, @@ -3741,12 +3752,8 @@ int dm_tree_node_add_target_area(struct dm_tree_node *node, return_0; } - if (!node->props.segment_count) { - log_error(INTERNAL_ERROR "Attempt to add target area to missing segment."); - return 0; - } - - seg = dm_list_item(dm_list_last(&node->props.segs), struct load_segment); + if (!(seg = _get_last_load_segment(node))) + return_0; if (!_add_area(node, seg, dev_node, offset)) return_0; @@ -3758,7 +3765,8 @@ int dm_tree_node_add_null_area(struct dm_tree_node *node, uint64_t offset) { struct load_segment *seg; - seg = dm_list_item(dm_list_last(&node->props.segs), struct load_segment); + if (!(seg = _get_last_load_segment(node))) + return_0; switch (seg->type) { case SEG_RAID0: