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-rw-r--r--libdiskfs/readonly.c77
-rw-r--r--libdiskfs/remount.c45
2 files changed, 122 insertions, 0 deletions
diff --git a/libdiskfs/readonly.c b/libdiskfs/readonly.c
new file mode 100644
index 00000000..18025468
--- /dev/null
+++ b/libdiskfs/readonly.c
@@ -0,0 +1,77 @@
+/* Change to/from read-only
+
+ Copyright (C) 1995 Free Software Foundation, Inc.
+
+ Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+ This file is part of the GNU Hurd.
+
+ The GNU Hurd is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ The GNU Hurd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <fcntl.h>
+
+#include "priv.h"
+
+/* Change an active filesystem between read-only and writable modes, setting
+ the global variable DISKFS_READONLY to reflect the current mode. If an
+ error is returned, nothing will have changed. The user should hold
+ DISKFS_FSYS_LOCK while calling this routine. */
+error_t
+diskfs_set_readonly (int readonly)
+{
+ error_t err = 0;
+
+ if (readonly != diskfs_readonly)
+ {
+ ports_inhibit_class_rpcs (diskfs_protid_class);
+
+ if (readonly)
+ {
+ error_t peropen_writable (void *pi)
+ {
+ if (((struct port_info *)pi)->class == diskfs_protid_class
+ && (((struct protid *)pi)->po->openstat & O_WRITE))
+ return EBUSY;
+ else
+ return 0;
+ }
+
+ /* Any writable open files? */
+ err = ports_bucket_iterate (diskfs_port_bucket, peropen_writable);
+
+ /* Any writable pagers? */
+ if (!err && (diskfs_max_user_pager_prot () & VM_PROT_WRITE))
+ err = EBUSY;
+
+ if (!err)
+ /* Sync */
+ {
+ diskfs_sync_everything (1);
+ diskfs_set_hypermetadata (1, 1);
+ sleep (1); /* XXX! */
+ }
+ }
+
+ if (!err)
+ {
+ diskfs_readonly = readonly;
+ diskfs_readonly_changed (readonly);
+ }
+
+ ports_resume_class_rpcs (diskfs_protid_class);
+ }
+
+ return err;
+}
diff --git a/libdiskfs/remount.c b/libdiskfs/remount.c
new file mode 100644
index 00000000..8e3b3b5f
--- /dev/null
+++ b/libdiskfs/remount.c
@@ -0,0 +1,45 @@
+/* Remount an active filesystem
+
+ Copyright (C) 1995 Free Software Foundation, Inc.
+
+ Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+ This file is part of the GNU Hurd.
+
+ The GNU Hurd is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2, or (at
+ your option) any later version.
+
+ The GNU Hurd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+/* Re-read all incore data structures from disk. This will only work if
+ DISKFS_READONLY is true. DISKFS_FSYS_LOCK should be held while calling
+ this routine. */
+error_t
+diskfs_remount ()
+{
+ error_t err;
+
+ if (! diskfs_readonly)
+ return EBUSY;
+
+ ports_inhibit_class_rpcs (diskfs_protid_class);
+
+ err = diskfs_reload_global_state ();
+ if (!err)
+ err = diskfs_node_iterate (diskfs_node_reload);
+
+ ports_resume_class_rpcs (diskfs_protid_class);
+
+ return err;
+}