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security_stack: Turn list of nested drivers into a doubly linked list

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In near future we will need to walk through the list of internal
drivers in reversed order. The simplest solution is to turn
singly linked list into a doubly linked list.
We will not need to start from the end really, so there's no tail
pointer kept.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Cole Robinson <crobinso@redhat.com>
This commit is contained in:
Michal Privoznik 2019-09-11 10:33:19 +02:00
parent 3f968a8706
commit cd355a526f
1 changed files with 2 additions and 0 deletions
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2
src/security/security_stack.c
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@ -35,6 +35,7 @@ typedef virSecurityStackItem *virSecurityStackItemPtr;
struct _virSecurityStackItem {
virSecurityManagerPtr securityManager;
virSecurityStackItemPtr next;
virSecurityStackItemPtr prev;
};
struct _virSecurityStackData {
@ -56,6 +57,7 @@ virSecurityStackAddNested(virSecurityManagerPtr mgr,
if (VIR_ALLOC(item) < 0)
return -1;
item->securityManager = nested;
item->prev = tmp;
if (tmp)
tmp->next = item;
else