Use refcount_t for peropen reference counting in libnetfs.

* libnetfs/netfs.h: Use refcount_t.
* libnetfs/make-peropen.c: Initialize to 1 with refcount_init just like in libdiskfs.
* libnetfs/make-protid.c: Don't increment the count here. Do it like libdiskfs.
* libnetfs/io-duplicate.c: Add refcount_ref since netfs_make_protid no longer increments the refcount.
* libnetfs/io-reauthenticate.c: Likewise.
* libnetfs/io-restrict-auth.c: Likewise.
* libnetfs/release-peropen.c: Dereference without locking.

1 files changed, 2 insertions, 0 deletions

diff --git a/libnetfs/io-reauthenticate.c b/libnetfs/io-reauthenticate.c
index 8ff4182b..b2d4a440 100644
--- a/libnetfs/io-reauthenticate.c
+++ b/libnetfs/io-reauthenticate.c
@@ -34,12 +34,14 @@ netfs_S_io_reauthenticate (struct protid *user, mach_port_t rend_port)
   /* This routine must carefully ignore EINTR because we
      are a simpleroutine, so callers won't know to restart. */
 
+  refcount_ref (&user->po->refcnt);
   pthread_mutex_lock (&user->po->np->lock);
   do
     newpi = netfs_make_protid (user->po, 0);
   while (! newpi && errno == EINTR);
   if (! newpi)
     {
+      refcount_deref (&user->po->refcnt);
       pthread_mutex_unlock (&user->po->np->lock);
       return errno;
     }