}
locked := map[sync.Locker]bool{}
for i := len(needLock) - 1; i >= 0; i-- {
- if n := needLock[i]; !locked[n] {
+ n := needLock[i]
+ if fs, ok := n.(interface{ rootnode() inode }); ok {
+ // Lock the fs's root dir directly, not
+ // through the fs. Otherwise our "locked" map
+ // would not reliably prevent double-locking
+ // the fs's root dir.
+ n = fs.rootnode()
+ }
+ if !locked[n] {
n.Lock()
defer n.Unlock()
locked[n] = true