From 651df2e03f3eb2fcca3446174625dda77b94bcc6 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Sun, 4 Apr 2021 19:36:51 +0200
Subject: pci-arbiter: restore code that allows it to run non-bootstrap

* pci-arbiter/pcifs.h (init_root_node): Restore underlying_node
  parameter.
* pci-arbiter/pcifs.c (underlying_stat): Drop global variable.
(init_root_node): Restore getting the stat from the underlying node.
* pci-arbiter/main.c (main): Restore calling netfs_startup in
non-bootstrap case, and pass underlying node to init_root_node. Only
call pcifs_startup in bootstrap case.
---
 pci-arbiter/main.c  | 11 ++++++++---
 pci-arbiter/pcifs.c | 18 ++++++++++++------
 pci-arbiter/pcifs.h |  2 +-
 3 files changed, 21 insertions(+), 10 deletions(-)

diff --git a/pci-arbiter/main.c b/pci-arbiter/main.c
index 050f1aac..4f4f13da 100644
--- a/pci-arbiter/main.c
+++ b/pci-arbiter/main.c
@@ -205,6 +205,7 @@ main (int argc, char **argv)
   mach_port_t bootstrap;
   mach_port_t disk_server_task;
   pthread_t t, nt;
+  file_t underlying_node = MACH_PORT_NULL;
 
   /* Parse options */
   alloc_file_system (&fs);
@@ -245,12 +246,16 @@ main (int argc, char **argv)
     machdev_trivfs_server(bootstrap);
     /* Timer started, quickly do all these next, before we call rump_init */
 
+  if (disk_server_task == MACH_PORT_NULL)
+    underlying_node = netfs_startup (bootstrap, O_READ);
+
   /* Create the root node first */
-  err = init_root_node ();
+  err = init_root_node (underlying_node);
   if (err)
     error (1, err, "Creating the root node");
-  
-  pcifs_startup (bootstrap, O_READ);
+
+  if (disk_server_task != MACH_PORT_NULL)
+    pcifs_startup (bootstrap, O_READ);
 
   err = init_file_system (fs);
   if (err)
diff --git a/pci-arbiter/pcifs.c b/pci-arbiter/pcifs.c
index 699d5942..3b13e437 100644
--- a/pci-arbiter/pcifs.c
+++ b/pci-arbiter/pcifs.c
@@ -31,9 +31,6 @@
 #include "ncache.h"
 #include "func_files.h"
 
-/* Empty status for root node when bootstrapping */
-static io_statbuf_t underlying_stat;
-
 static error_t
 create_dir_entry (int32_t domain, int16_t bus, int16_t dev,
 		  int16_t func, int32_t device_class, char *name,
@@ -92,15 +89,24 @@ alloc_file_system (struct pcifs ** fs)
 }
 
 error_t
-init_root_node (void)
+init_root_node (file_t underlying_node)
 {
+  error_t err;
   struct node *np;
-  io_statbuf_t *underlying_node_stat = &underlying_stat;
+  io_statbuf_t underlying_node_stat = { 0 };
+
+  if (underlying_node != MACH_PORT_NULL)
+    {
+      /* Initialize status from underlying node.  */
+      err = io_stat (underlying_node, &underlying_node_stat);
+      if (err)
+	return err;
+    }
 
   np = netfs_make_node_alloc (sizeof (struct netnode));
   if (!np)
     return ENOMEM;
-  np->nn_stat = *underlying_node_stat;
+  np->nn_stat = underlying_node_stat;
   np->nn_stat.st_fsid = getpid ();
   np->nn_stat.st_mode =
     S_IFDIR | S_IROOT | S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH |
diff --git a/pci-arbiter/pcifs.h b/pci-arbiter/pcifs.h
index 33a2b8c1..ba16ebaa 100644
--- a/pci-arbiter/pcifs.h
+++ b/pci-arbiter/pcifs.h
@@ -205,7 +205,7 @@ extern volatile struct mapped_time_value *pcifs_maptime;
 
 /* FS manipulation functions */
 error_t alloc_file_system (struct pcifs **fs);
-error_t init_root_node (void);
+error_t init_root_node (file_t underlying_node);
 error_t init_file_system (struct pcifs *fs);
 error_t create_fs_tree (struct pcifs *fs);
 error_t fs_set_permissions (struct pcifs *fs);
-- 
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