2 files changed, 63 insertions, 42 deletions

diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index fade02c15e6e..fa05c027ea11 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -43,7 +43,7 @@ static int  nfs_file_mmap(struct file *, struct vm_area_struct *);
 static ssize_t nfs_file_sendfile(struct file *, loff_t *, size_t, read_actor_t, void *);
 static ssize_t nfs_file_read(struct kiocb *, char __user *, size_t, loff_t);
 static ssize_t nfs_file_write(struct kiocb *, const char __user *, size_t, loff_t);
-static int  nfs_file_flush(struct file *);
+static int  nfs_file_flush(struct file *, fl_owner_t id);
 static int  nfs_fsync(struct file *, struct dentry *dentry, int datasync);
 static int nfs_check_flags(int flags);
 static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl);
@@ -188,7 +188,7 @@ static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
  *
  */
 static int
-nfs_file_flush(struct file *file)
+nfs_file_flush(struct file *file, fl_owner_t id)
 {
         struct nfs_open_context *ctx = (struct nfs_open_context *)file->private_data;
         struct inode    *inode = file->f_dentry->d_inode;
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index d0b991a92327..937fbfc381bb 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -65,7 +65,7 @@ static int nfs_write_inode(struct inode *,int);
 static void nfs_delete_inode(struct inode *);
 static void nfs_clear_inode(struct inode *);
 static void nfs_umount_begin(struct super_block *);
-static int  nfs_statfs(struct super_block *, struct kstatfs *);
+static int  nfs_statfs(struct dentry *, struct kstatfs *);
 static int  nfs_show_options(struct seq_file *, struct vfsmount *);
 static int  nfs_show_stats(struct seq_file *, struct vfsmount *);
 static void nfs_zap_acl_cache(struct inode *);
@@ -534,8 +534,9 @@ nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
 }
 
 static int
-nfs_statfs(struct super_block *sb, struct kstatfs *buf)
+nfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
+        struct super_block *sb = dentry->d_sb;
         struct nfs_server *server = NFS_SB(sb);
         unsigned char blockbits;
         unsigned long blockres;
@@ -1690,8 +1691,8 @@ static int nfs_compare_super(struct super_block *sb, void *data)
         return !nfs_compare_fh(&old->fh, &server->fh);
 }
 
-static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
-        int flags, const char *dev_name, void *raw_data)
+static int nfs_get_sb(struct file_system_type *fs_type,
+        int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
 {
         int error;
         struct nfs_server *server = NULL;
@@ -1699,14 +1700,14 @@ static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
         struct nfs_fh *root;
         struct nfs_mount_data *data = raw_data;
 
-        s = ERR_PTR(-EINVAL);
+        error = -EINVAL;
         if (data == NULL) {
                 dprintk("%s: missing data argument\n", __FUNCTION__);
-                goto out_err;
+                goto out_err_noserver;
         }
         if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
                 dprintk("%s: bad mount version\n", __FUNCTION__);
-                goto out_err;
+                goto out_err_noserver;
         }
         switch (data->version) {
                 case 1:
@@ -1718,7 +1719,7 @@ static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
                                 dprintk("%s: mount structure version %d does not support NFSv3\n",
                                                 __FUNCTION__,
                                                 data->version);
-                                goto out_err;
+                                goto out_err_noserver;
                         }
                         data->root.size = NFS2_FHSIZE;
                         memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
@@ -1727,24 +1728,24 @@ static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
                                 dprintk("%s: mount structure version %d does not support strong security\n",
                                                 __FUNCTION__,
                                                 data->version);
-                                goto out_err;
+                                goto out_err_noserver;
                         }
                 case 5:
                         memset(data->context, 0, sizeof(data->context));
         }
 #ifndef CONFIG_NFS_V3
         /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
-        s = ERR_PTR(-EPROTONOSUPPORT);
+        error = -EPROTONOSUPPORT;
         if (data->flags & NFS_MOUNT_VER3) {
                 dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
-                goto out_err;
+                goto out_err_noserver;
         }
 #endif /* CONFIG_NFS_V3 */
 
-        s = ERR_PTR(-ENOMEM);
+        error = -ENOMEM;
         server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
         if (!server)
-                goto out_err;
+                goto out_err_noserver;
         /* Zero out the NFS state stuff */
         init_nfsv4_state(server);
         server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
@@ -1754,7 +1755,7 @@ static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
                 root->size = data->root.size;
         else
                 root->size = NFS2_FHSIZE;
-        s = ERR_PTR(-EINVAL);
+        error = -EINVAL;
         if (root->size > sizeof(root->data)) {
                 dprintk("%s: invalid root filehandle\n", __FUNCTION__);
                 goto out_err;
@@ -1770,15 +1771,20 @@ static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
         }
 
         /* Fire up rpciod if not yet running */
-        s = ERR_PTR(rpciod_up());
-        if (IS_ERR(s)) {
-                dprintk("%s: couldn't start rpciod! Error = %ld\n",
-                                __FUNCTION__, PTR_ERR(s));
+        error = rpciod_up();
+        if (error < 0) {
+                dprintk("%s: couldn't start rpciod! Error = %d\n",
+                                __FUNCTION__, error);
                 goto out_err;
         }
 
         s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
-        if (IS_ERR(s) || s->s_root)
+        if (IS_ERR(s)) {
+                error = PTR_ERR(s);
+                goto out_err_rpciod;
+        }
+
+        if (s->s_root)
                 goto out_rpciod_down;
 
         s->s_flags = flags;
@@ -1787,15 +1793,22 @@ static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
         if (error) {
                 up_write(&s->s_umount);
                 deactivate_super(s);
-                return ERR_PTR(error);
+                return error;
         }
         s->s_flags |= MS_ACTIVE;
-        return s;
+        return simple_set_mnt(mnt, s);
+
 out_rpciod_down:
         rpciod_down();
+        kfree(server);
+        return simple_set_mnt(mnt, s);
+
+out_err_rpciod:
+        rpciod_down();
 out_err:
         kfree(server);
-        return s;
+out_err_noserver:
+        return error;
 }
 
 static void nfs_kill_super(struct super_block *s)
@@ -2032,8 +2045,8 @@ nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
         return dst;
 }
 
-static struct super_block *nfs4_get_sb(struct file_system_type *fs_type,
-        int flags, const char *dev_name, void *raw_data)
+static int nfs4_get_sb(struct file_system_type *fs_type,
+        int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt)
 {
         int error;
         struct nfs_server *server;
@@ -2043,16 +2056,16 @@ static struct super_block *nfs4_get_sb(struct file_system_type *fs_type,
 
         if (data == NULL) {
                 dprintk("%s: missing data argument\n", __FUNCTION__);
-                return ERR_PTR(-EINVAL);
+                return -EINVAL;
         }
         if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) {
                 dprintk("%s: bad mount version\n", __FUNCTION__);
-                return ERR_PTR(-EINVAL);
+                return -EINVAL;
         }
 
         server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
         if (!server)
-                return ERR_PTR(-ENOMEM);
+                return -ENOMEM;
         /* Zero out the NFS state stuff */
         init_nfsv4_state(server);
         server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
@@ -2074,33 +2087,41 @@ static struct super_block *nfs4_get_sb(struct file_system_type *fs_type,
 
         /* We now require that the mount process passes the remote address */
         if (data->host_addrlen != sizeof(server->addr)) {
-                s = ERR_PTR(-EINVAL);
+                error = -EINVAL;
                 goto out_free;
         }
         if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) {
-                s = ERR_PTR(-EFAULT);
+                error = -EFAULT;
                 goto out_free;
         }
         if (server->addr.sin_family != AF_INET ||
             server->addr.sin_addr.s_addr == INADDR_ANY) {
                 dprintk("%s: mount program didn't pass remote IP address!\n",
                                 __FUNCTION__);
-                s = ERR_PTR(-EINVAL);
+                error = -EINVAL;
                 goto out_free;
         }
 
         /* Fire up rpciod if not yet running */
-        s = ERR_PTR(rpciod_up());
-        if (IS_ERR(s)) {
-                dprintk("%s: couldn't start rpciod! Error = %ld\n",
-                                __FUNCTION__, PTR_ERR(s));
+        error = rpciod_up();
+        if (error < 0) {
+                dprintk("%s: couldn't start rpciod! Error = %d\n",
+                                __FUNCTION__, error);
                 goto out_free;
         }
 
         s = sget(fs_type, nfs4_compare_super, nfs_set_super, server);
-
-        if (IS_ERR(s) || s->s_root)
+        if (IS_ERR(s)) {
+                error = PTR_ERR(s);
                 goto out_free;
+        }
+
+        if (s->s_root) {
+                kfree(server->mnt_path);
+                kfree(server->hostname);
+                kfree(server);
+                return simple_set_mnt(mnt, s);
+        }
 
         s->s_flags = flags;
 
@@ -2108,17 +2129,17 @@ static struct super_block *nfs4_get_sb(struct file_system_type *fs_type,
         if (error) {
                 up_write(&s->s_umount);
                 deactivate_super(s);
-                return ERR_PTR(error);
+                return error;
         }
         s->s_flags |= MS_ACTIVE;
-        return s;
+        return simple_set_mnt(mnt, s);
 out_err:
-        s = (struct super_block *)p;
+        error = PTR_ERR(p);
 out_free:
         kfree(server->mnt_path);
         kfree(server->hostname);
         kfree(server);
-        return s;
+        return error;
 }
 
 static void nfs4_kill_super(struct super_block *sb)