From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Fri, 6 Jul 2018 05:01:48 +0000 (-0400)
Subject: fd-tracker: perform unsuspendable_fd release through call_rcu
X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=commitdiff_plain;h=89b4e38cf343e8e9ecde498e0b5530478dae6c3b

fd-tracker: perform unsuspendable_fd release through call_rcu

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---

diff --git a/src/common/fd-tracker/fd-tracker.c b/src/common/fd-tracker/fd-tracker.c
index 3720e075c..580f20a00 100644
--- a/src/common/fd-tracker/fd-tracker.c
+++ b/src/common/fd-tracker/fd-tracker.c
@@ -129,6 +129,7 @@ struct unsuspendable_fd {
 	int fd;
 	char *name;
 	struct cds_lfht_node tracker_node;
+	struct rcu_head rcu_head;
 };
 
 static struct {
@@ -169,14 +170,23 @@ int match_fd(struct cds_lfht_node *node, const void *key)
 			(void *) key);
 }
 
+static
+void delete_unsuspendable_fd(struct rcu_head *head)
+{
+	struct unsuspendable_fd *fd = caa_container_of(head,
+			struct unsuspendable_fd, rcu_head);
+
+	free(fd->name);
+	free(fd);
+}
+
 static
 void unsuspendable_fd_destroy(struct unsuspendable_fd *entry)
 {
 	if (!entry) {
 		return;
 	}
-	free(entry->name);
-	free(entry);
+	call_rcu(&entry->rcu_head, delete_unsuspendable_fd);
 }
 
 static