(periodic_sync): Hold DISKFS_FSYS_LOCK for reading while syncing.

1 files changed, 6 insertions, 0 deletions

diff --git a/libdiskfs/fsys-syncfs.c b/libdiskfs/fsys-syncfs.c
index 6ea8c774..81477113 100644
--- a/libdiskfs/fsys-syncfs.c
+++ b/libdiskfs/fsys-syncfs.c
@@ -52,6 +52,8 @@ diskfs_S_fsys_syncfs (fsys_t controlport,
   if (!pi)
     return EOPNOTSUPP;
   
+  rwlock_reader_lock (&diskfs_fsys_lock);
+
   if (children)
     diskfs_node_iterate (helper);
 
@@ -60,7 +62,11 @@ diskfs_S_fsys_syncfs (fsys_t controlport,
   
   diskfs_sync_everything (wait);
   diskfs_set_hypermetadata (wait, 0);
+
+  rwlock_reader_unlock (&diskfs_fsys_lock);
+
   ports_port_deref (pi);
+
   return 0;
 }