linux-kernel - Re: [patch 07/22] fat: dont call notify

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Message-Id: <E1JxGLP-000406-Eo@pomaz-ex.szeredi.hu>
Date:	Sat, 17 May 2008 08:56:39 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	hirofumi@...l.parknet.co.jp
CC:	miklos@...redi.hu, akpm@...ux-foundation.org, hch@...radead.org,
	viro@...IV.linux.org.uk, ezk@...sunysb.edu,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [patch 07/22] fat: dont call notify_change

> > From: Miklos Szeredi <mszeredi@...e.cz>
> >
> > The FAT_IOCTL_SET_ATTRIBUTES ioctl() calls notify_change() to change
> > the file mode before changing the inode attributes.  Replace with
> > explicit calls to security_inode_setattr(), fat_setattr() and
> > fsnotify_change().
> >
> > This is equivalent to the original.  The reason it is needed, is that
> > later in the series we move the immutable check into notify_change().
> > That would break the FAT_IOCTL_SET_ATTRIBUTES ioctl, as it needs to
> > perform the mode change regardless of the immutability of the file.
> >
> > Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
> > CC: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
> 
> Don't we need to add EXPORT_SYMBOL(security_inode_setattr)?

Yes we do, thanks for noticing.  Committed the below patch to the
vfs-cleanups tree.

> Otherwise,
> looks good to me.
> 
> Acked-by: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>

Thanks.

Miklos
----

Subject: fat: don't call notify_change fix

From: Miklos Szeredi <mszeredi@...e.cz>

ERROR: "security_inode_setattr" [fs/fat/fat.ko] undefined!

Fix error if fat is built as a module.  Thanks to OGAWA Hirofumi for
noticing.

Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
CC: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
---
 security/security.c |    1 +
 1 file changed, 1 insertion(+)

Index: linux-2.6/security/security.c
===================================================================
--- linux-2.6.orig/security/security.c	2008-05-14 12:49:42.000000000 +0200
+++ linux-2.6/security/security.c	2008-05-17 08:46:52.000000000 +0200
@@ -476,6 +476,7 @@ int security_inode_setattr(struct dentry
 		return 0;
 	return security_ops->inode_setattr(dentry, attr);
 }
+EXPORT_SYMBOL_GPL(security_inode_setattr);
 
 int security_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
 {
--
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