NFS: Fix the initialisation of the readdir 'cookieverf' array

When the NFS_COOKIEVERF helper macro was converted into a static
inline function in commit 99fadcd764 (nfs: convert NFS_*(inode)
helpers to static inline), we broke the initialisation of the
readdir cookies, since that depended on doing a memset with an
argument of 'sizeof(NFS_COOKIEVERF(inode))' which therefore
changed from sizeof(be32 cookieverf[2]) to sizeof(be32 *).

At this point, NFS_COOKIEVERF seems to be more of an obfuscation
than a helper, so the best thing would be to just get rid of it.

Also see: https://bugzilla.kernel.org/show_bug.cgi?id=46881

Reported-by: Andi Kleen <andi@firstfloor.org>
Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org

4 files changed, 4 insertions, 9 deletions

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index c6e895f0fbf3..9b47610338f5 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -154,7 +154,7 @@ static void nfs_zap_caches_locked(struct inode *inode)
         nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
         nfsi->attrtimeo_timestamp = jiffies;
 
-        memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
+        memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf));
         if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
                 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
         else
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index d6b3b5f2d779..69322096c325 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -643,7 +643,7 @@ nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
                   u64 cookie, struct page **pages, unsigned int count, int plus)
 {
         struct inode            *dir = dentry->d_inode;
-        __be32                  *verf = NFS_COOKIEVERF(dir);
+        __be32                  *verf = NFS_I(dir)->cookieverf;
         struct nfs3_readdirargs arg = {
                 .fh             = NFS_FH(dir),
                 .cookie         = cookie,
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 635274140b18..86b4c7361036 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3215,11 +3215,11 @@ static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
                         dentry->d_parent->d_name.name,
                         dentry->d_name.name,
                         (unsigned long long)cookie);
-        nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
+        nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
         res.pgbase = args.pgbase;
         status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
         if (status >= 0) {
-                memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
+                memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
                 status += args.pgbase;
         }
 
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 1f8fc7f9bcd8..4b03f56e280e 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -265,11 +265,6 @@ static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode)
         return NFS_SERVER(inode)->nfs_client->rpc_ops;
 }
 
-static inline __be32 *NFS_COOKIEVERF(const struct inode *inode)
-{
-        return NFS_I(inode)->cookieverf;
-}
-
 static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode)
 {
         struct nfs_server *nfss = NFS_SERVER(inode);