[PATCH] fixing supermount for > 2.4.19pre4

["Jörg Prante" <joergprante@gmx.de>]

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Hi,

in 2.4.19pre4, the dentry revalidation has been patched, and the VFS behavior 
has changed due to an NFS bugfix. All non-standard remote file systems (like 
supermount, ftpfs, etc.) are in conflict with the patch and may not operate 
correctly.

Alan Cox pointed out that non-standard remote file systems should get fixed 
for 2.4.19. So, here is my quick hack for supermount 0.7 that changes the 
return policy in the d_revalidate operation. Supermount should work now in 
2.4.19pre4 kernels and higher.

Other file systems with similar revalidate policy can get fixed accordingly.

Cheers,

Jörg

[-- Attachment #2: supermount-2.4.19pre8-fix.patch --]
[-- Type: text/x-diff, Size: 936 bytes --]

--- linux/fs/supermount/dentry_operations.c.orig	Fri May 17 00:36:21 2002
+++ linux/fs/supermount/dentry_operations.c	Fri May 17 01:16:06 2002
@@ -25,8 +25,9 @@
 
 	dump_dentry(dentry);
 
-	if (!subfs_go_online(dentry->d_sb))
-		goto bad_dentry;
+	if (!subfs_go_online(dentry->d_sb)) {
+		goto out;
+    }
 	spin_lock(&dcache_lock);
 	if (dentry->d_inode && is_inode_obsolete(dentry->d_inode)) {
 		supermount_debug("found old dentry: **%s**",
@@ -36,20 +37,21 @@
 	}
 	spin_unlock(&dcache_lock);
 	subd = get_subfs_dentry(dentry);
-	if (IS_ERR(subd))
+	if (IS_ERR(subd)) {
 		goto bad_dentry;
+	}
 
 	if (subd->d_op && subd->d_op->d_revalidate) {
 		supermount_debug("lowlevel revalidate");
 		rc = subd->d_op->d_revalidate(subd, flags);
 	}
 	dput(subd);
+	goto out;
+bad_dentry:
+	rc = 0;
 out:
 	subfs_go_inactive(dentry->d_sb);
 	return rc;
-bad_dentry:
-	rc = 0;
-	goto out;
 }
 
 struct dentry_operations supermount_dir_dops = {