>From d814b3960af9a1cda9c92f1323662a1f2ce02a54 Mon Sep 17 00:00:00 2001
From: Sergiu Ivanov <unlimitedscol...@gmail.com>
Date: Wed, 8 Jul 2009 18:46:58 +0000
Subject: [PATCH] Implement the sync libnetfs stubs.
* netfs.c (netfs_attempt_sync): Sync every writable directory
associated with the supplied node.
(netfs_attempt_syncfs): Sync the root node.
---
netfs.c | 48 +++++++++++++++++++++++++++++++++++++++++++++---
1 files changed, 45 insertions(+), 3 deletions(-)
diff --git a/netfs.c b/netfs.c
index 89d1bf6..1ac16b3 100644
--- a/netfs.c
+++ b/netfs.c
@@ -1,5 +1,6 @@
/* Hurd unionfs
- Copyright (C) 2001, 2002, 2003, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2002, 2003, 2005, 2009 Free Software Foundation, Inc.
+
Written by Moritz Schulte <mor...@duesseldorf.ccc.de>.
This program is free software; you can redistribute it and/or
@@ -282,7 +283,45 @@ error_t
netfs_attempt_sync (struct iouser *cred, struct node *np,
int wait)
{
- return EOPNOTSUPP;
+ error_t err = 0;
+
+ /* A pessimistic combination (failure wins) of the results of all
+ calls to file_sync. */
+ error_t combined_err = 0;
+
+ /* The index of the currently analyzed filesystem. */
+ int i = 0;
+
+ /* The information about the currently analyzed filesystem. */
+ ulfs_t * ulfs;
+
+ mutex_lock (&ulfs_lock);
+
+ /* Sync every writable directory associated with `np`.
+
+ TODO: Rewrite this after having modified ulfs.c and node.c to
+ store the paths and ports to the underlying directories in one
+ place, because now iterating over both lists looks ugly. */
+ node_ulfs_iterate_unlocked (np)
+ {
+ /* Get the information about the current filesystem. */
+ err = ulfs_get_num (i, &ulfs);
+ if (err)
+ combined_err = err;
+
+ if ((node_ulfs->port != MACH_PORT_NULL)
+ && (ulfs->flags & FLAG_ULFS_WRITABLE))
+ {
+ err = file_sync (node_ulfs->port, wait, 0);
+ if (err)
+ combined_err = err;
+ }
+
+ ++i;
+ }
+
+ mutex_unlock (&ulfs_lock);
+ return combined_err;
}
/* This should sync the entire remote filesystem. If WAIT is set,
@@ -290,7 +329,10 @@ netfs_attempt_sync (struct iouser *cred, struct node *np,
error_t
netfs_attempt_syncfs (struct iouser *cred, int wait)
{
- return 0;
+ /* The complete list of ports to the merged filesystems is
+ maintained in the root node of unionfs, so if we sync it, we sync
+ every single merged directory. */
+ return netfs_attempt_sync (cred, netfs_root_node, wait);
}
/* lookup */
--
1.6.3.3
