linux-kernel - [2.6.22.y] {11/14} - NFS: Fix nfs_reval_fsid()

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Date:	Thu, 7 Feb 2008 21:03:45 +0100
From:	"Oliver Pinter" <oliver.pntr@...il.com>
To:	"Linux Kernel" <linux-kernel@...r.kernel.org>, stable@...nel.org,
	stable-commits@...r.kernel.org
Subject: [2.6.22.y] {11/14} - NFS: Fix nfs_reval_fsid() - on top of 2.6.22.17

aka: nfs-fix-nfs-reval-fsid.patch

Patch-mainline: 2.6.24
References: 271803
GIT: a0356862bcbeb20acf64bc1a82d28a4c5bb957a7 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <Trond.Myklebust@...app.com>
Date: Tue, 5 Jun 2007 13:26:15 -0400

Subject: [PATCH] NFS: Fix nfs_reval_fsid()

mainline: a0356862bcbeb20acf64bc1a82d28a4c5bb957a7

We don't need to revalidate the fsid on the root directory. It suffices to
revalidate it on the current directory.

Signed-off-by: Trond Myklebust <Trond.Myklebust@...app.com>
Acked-by: NeilBrown <neilb@...e.de>
CC: Oliver Pinter <oliver.pntr@...il.com>

---
 fs/nfs/dir.c   |    9 ++++-----
 fs/nfs/inode.c |    4 ++--
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 4948ec1..c02a796 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -897,14 +897,13 @@ int nfs_is_exclusive_create(struct inode *dir,
struct nameidata *nd)
 	return (nd->intent.open.flags & O_EXCL) != 0;
 }

-static inline int nfs_reval_fsid(struct vfsmount *mnt, struct inode *dir,
-				 struct nfs_fh *fh, struct nfs_fattr *fattr)
+static inline int nfs_reval_fsid(struct inode *dir, const struct
nfs_fattr *fattr)
 {
 	struct nfs_server *server = NFS_SERVER(dir);

 	if (!nfs_fsid_equal(&server->fsid, &fattr->fsid))
-		/* Revalidate fsid on root dir */
-		return __nfs_revalidate_inode(server, mnt->mnt_root->d_inode);
+		/* Revalidate fsid using the parent directory */
+		return __nfs_revalidate_inode(server, dir);
 	return 0;
 }

@@ -946,7 +945,7 @@ static struct dentry *nfs_lookup(struct inode
*dir, struct dentry * dentry, stru
 		res = ERR_PTR(error);
 		goto out_unlock;
 	}
-	error = nfs_reval_fsid(nd->mnt, dir, &fhandle, &fattr);
+	error = nfs_reval_fsid(dir, &fattr);
 	if (error < 0) {
 		res = ERR_PTR(error);
 		goto out_unlock;
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 23ecf03..7bcb3df 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -961,8 +961,8 @@ static int nfs_update_inode(struct inode *inode,
struct nfs_fattr *fattr)
 		goto out_changed;

 	server = NFS_SERVER(inode);
-	/* Update the fsid if and only if this is the root directory */
-	if (inode == inode->i_sb->s_root->d_inode
+	/* Update the fsid? */
+	if (S_ISDIR(inode->i_mode)
 			&& !nfs_fsid_equal(&server->fsid, &fattr->fsid))
 		server->fsid = fattr->fsid;

-- 
1.5.3.6


-- 
Thanks,
Oliver
--
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