linux-kernel - [PATCH 02/23] create cleanup helper svc

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Message-Id: <20070712001712.14A5552E@kernel>
Date:	Wed, 11 Jul 2007 17:17:12 -0700
From:	Dave Hansen <haveblue@...ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-fsdevel@...r.kernel.org, viro@...iv.linux.org.uk,
	hch@...radead.org, Dave Hansen <haveblue@...ibm.com>
Subject: [PATCH 02/23] create cleanup helper svc_msnfs()


I'm going to be modifying nfsd_rename() shortly to support
read-only bind mounts.  This #ifdef is around the area I'm
patching, and it starts to get really ugly if I just try
to add my new code by itself.  Using this little helper
makes things a lot cleaner to use.

Signed-off-by: Dave Hansen <haveblue@...ibm.com>
---

 lxc-dave/fs/nfsd/vfs.c |   15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff -puN fs/nfsd/vfs.c~create-svc_msnfs-helper fs/nfsd/vfs.c
--- lxc/fs/nfsd/vfs.c~create-svc_msnfs-helper	2007-07-10 12:46:02.000000000 -0700
+++ lxc-dave/fs/nfsd/vfs.c	2007-07-10 12:46:02.000000000 -0700
@@ -837,6 +837,15 @@ nfsd_read_actor(read_descriptor_t *desc,
 	return size;
 }
 
+static inline int svc_msnfs(struct svc_fh *ffhp)
+{
+#ifdef MSNFS
+	return (ffhp->fh_export->ex_flags & NFSEXP_MSNFS);
+#else
+	return 0;
+#endif
+}
+
 static __be32
 nfsd_vfs_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
               loff_t offset, struct kvec *vec, int vlen, unsigned long *count)
@@ -849,11 +858,9 @@ nfsd_vfs_read(struct svc_rqst *rqstp, st
 
 	err = nfserr_perm;
 	inode = file->f_path.dentry->d_inode;
-#ifdef MSNFS
-	if ((fhp->fh_export->ex_flags & NFSEXP_MSNFS) &&
-		(!lock_may_read(inode, offset, *count)))
+
+	if (svc_msnfs(fhp) && !lock_may_read(inode, offset, *count))
 		goto out;
-#endif
 
 	/* Get readahead parameters */
 	ra = nfsd_get_raparms(inode->i_sb->s_dev, inode->i_ino);
_
-
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