[PATCH 3/6] libnetfs: Hacks to allow pci to run with no cred

[Damien Zammit]

---
 libnetfs/dir-lookup.c      | 30 +++++++++++++++++++++---------
 libnetfs/dir-readdir.c     |  3 ---
 libnetfs/file-getcontrol.c | 13 ++++++-------
 libnetfs/make-protid.c     |  8 +-------
 pci-arbiter/netfs_impl.c   |  2 ++
 5 files changed, 30 insertions(+), 26 deletions(-)

diff --git a/libnetfs/dir-lookup.c b/libnetfs/dir-lookup.c
index 23adeb33..9bf78225 100644
--- a/libnetfs/dir-lookup.c
+++ b/libnetfs/dir-lookup.c
@@ -50,9 +50,6 @@ netfs_S_dir_lookup (struct protid *dircred,
   struct protid *newpi = NULL;
   struct iouser *user;
 
-  if (!dircred)
-    return EOPNOTSUPP;
-
   create = (flags & O_CREAT);
   excl = (flags & O_EXCL);
 
@@ -73,6 +70,12 @@ netfs_S_dir_lookup (struct protid *dircred,
   *do_retry = FS_RETRY_NORMAL;
   *retry_name = '\0';
 
+  if (!dircred)
+    {
+      dircred = netfs_make_protid (netfs_make_peropen (netfs_root_node, flags, 
0), 0);
+      dircred->po->path = filename;
+    }
+
   if (*filename == '\0')
     {
       /* Set things up in the state expected by the code from gotit: on. */
@@ -423,15 +426,24 @@ netfs_S_dir_lookup (struct protid *dircred,
 
   flags &= ~OPENONLY_STATE_MODES;
 
-  err = iohelp_dup_iouser (&user, dircred->user);
-  if (err)
-    goto out;
+  if (dircred->user)
+    {
+      err = iohelp_dup_iouser (&user, dircred->user);
+      if (err)
+        goto out;
+    }
+  else
+    {
+      user = NULL;
+      err = 0;
+    }
+
+  newpi = netfs_make_protid (netfs_make_peropen (np, flags, dircred->po), 
user);
 
-  newpi = netfs_make_protid (netfs_make_peropen (np, flags, dircred->po),
-                            user);
   if (! newpi)
     {
-      iohelp_free_iouser (user);
+      if (user)
+        iohelp_free_iouser (user);
       err = errno;
       goto out;
     }
diff --git a/libnetfs/dir-readdir.c b/libnetfs/dir-readdir.c
index 3d40dfa5..83dbf2d4 100644
--- a/libnetfs/dir-readdir.c
+++ b/libnetfs/dir-readdir.c
@@ -36,9 +36,6 @@ netfs_S_dir_readdir (struct protid *user,
   error_t err;
   struct node *np;
 
-  if (!user)
-    return EOPNOTSUPP;
-
   np = user->po->np;
   pthread_mutex_lock (&np->lock);
 
diff --git a/libnetfs/file-getcontrol.c b/libnetfs/file-getcontrol.c
index 0e29ccf9..833fe196 100644
--- a/libnetfs/file-getcontrol.c
+++ b/libnetfs/file-getcontrol.c
@@ -31,13 +31,12 @@ netfs_S_file_getcontrol (struct protid *user,
   error_t err;
   struct port_info *pi;
 
-  if (!user)
-    return EOPNOTSUPP;
-
-  err = fshelp_iscontroller (&netfs_root_node->nn_stat, user->user);
-  if (err)
-    return err;
-  
+  if (user)
+    {
+      err = fshelp_iscontroller (&netfs_root_node->nn_stat, user->user);
+      if (err)
+        return err;
+    } 
   /* They've have the appropriate credentials; give it to them. */
   err = ports_create_port (netfs_control_class, netfs_port_bucket,
                           sizeof (struct port_info), &pi);
diff --git a/libnetfs/make-protid.c b/libnetfs/make-protid.c
index 995ac1ea..2087f220 100644
--- a/libnetfs/make-protid.c
+++ b/libnetfs/make-protid.c
@@ -25,14 +25,8 @@ netfs_make_protid (struct peropen *po, struct iouser *cred)
 {
   struct protid *pi;
 
-  if (cred)
-    errno = ports_create_port (netfs_protid_class, netfs_port_bucket, 
+  errno = ports_create_port (netfs_protid_class, netfs_port_bucket, 
                               sizeof (struct protid), &pi);
-  else
-    errno = ports_create_port_noinstall (netfs_protid_class,
-                                        netfs_port_bucket, 
-                                        sizeof (struct protid), &pi);
-    
   if (errno)
     return 0;
 
diff --git a/pci-arbiter/netfs_impl.c b/pci-arbiter/netfs_impl.c
index e977dce3..22c35292 100644
--- a/pci-arbiter/netfs_impl.c
+++ b/pci-arbiter/netfs_impl.c
@@ -179,6 +179,8 @@ error_t
 netfs_check_open_permissions (struct iouser * user, struct node * node,
                              int flags, int newnode)
 {
+  if (!user)
+    return 0;
   return entry_check_perms (user, node->nn->ln, flags);
 }
 
-- 
2.30.1