SUNRPC: Clean up file creation code in rpc_pipefs

[safe/jmp/linux-2.6] / net / sunrpc / rpc_pipe.c

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 2940b92..d8c7815 100644 (file)
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -539,6 +539,68 @@ rpc_get_inode(struct super_block *sb, umode_t mode)
        return inode;
 }
 
+static int __rpc_create_common(struct inode *dir, struct dentry *dentry,
+                              umode_t mode,
+                              const struct file_operations *i_fop,
+                              void *private)
+{
+       struct inode *inode;
+
+       BUG_ON(!d_unhashed(dentry));
+       inode = rpc_get_inode(dir->i_sb, mode);
+       if (!inode)
+               goto out_err;
+       inode->i_ino = iunique(dir->i_sb, 100);
+       if (i_fop)
+               inode->i_fop = i_fop;
+       if (private)
+               rpc_inode_setowner(inode, private);
+       d_add(dentry, inode);
+       return 0;
+out_err:
+       printk(KERN_WARNING "%s: %s failed to allocate inode for dentry %s\n",
+                       __FILE__, __func__, dentry->d_name.name);
+       dput(dentry);
+       return -ENOMEM;
+}
+
+static int __rpc_mkdir(struct inode *dir, struct dentry *dentry,
+                      umode_t mode,
+                      const struct file_operations *i_fop,
+                      void *private)
+{
+       int err;
+
+       err = __rpc_create_common(dir, dentry, S_IFDIR | mode, i_fop, private);
+       if (err)
+               return err;
+       inc_nlink(dir);
+       fsnotify_mkdir(dir, dentry);
+       return 0;
+}
+
+static int __rpc_mkpipe(struct inode *dir, struct dentry *dentry,
+                       umode_t mode,
+                       const struct file_operations *i_fop,
+                       void *private,
+                       const struct rpc_pipe_ops *ops,
+                       int flags)
+{
+       struct rpc_inode *rpci;
+       int err;
+
+       err = __rpc_create_common(dir, dentry, S_IFIFO | mode, i_fop, private);
+       if (err)
+               return err;
+       rpci = RPC_I(dentry->d_inode);
+       rpci->nkern_readwriters = 1;
+       rpci->private = private;
+       rpci->flags = flags;
+       rpci->ops = ops;
+       fsnotify_create(dir, dentry);
+       return 0;
+}
+
 /*
  * FIXME: This probably has races.
  */
@@ -629,25 +691,6 @@ out_bad:
 }
 
 static int
-__rpc_mkdir(struct inode *dir, struct dentry *dentry)
-{
-       struct inode *inode;
-
-       inode = rpc_get_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO);
-       if (!inode)
-               goto out_err;
-       inode->i_ino = iunique(dir->i_sb, 100);
-       d_instantiate(dentry, inode);
-       inc_nlink(dir);
-       fsnotify_mkdir(dir, dentry);
-       return 0;
-out_err:
-       printk(KERN_WARNING "%s: %s failed to allocate inode for dentry %s\n",
-                       __FILE__, __func__, dentry->d_name.name);
-       return -ENOMEM;
-}
-
-static int
 __rpc_rmdir(struct inode *dir, struct dentry *dentry)
 {
        int error;
@@ -717,9 +760,9 @@ rpc_mkdir(char *path, struct rpc_clnt *rpc_client)
        if (IS_ERR(dentry))
                return dentry;
        dir = nd.path.dentry->d_inode;
-       if ((error = __rpc_mkdir(dir, dentry)) != 0)
-               goto err_dput;
-       RPC_I(dentry->d_inode)->private = rpc_client;
+       error = __rpc_mkdir(dir, dentry, S_IRUGO | S_IXUGO, NULL, rpc_client);
+       if (error != 0)
+               goto out_err;
        error = rpc_populate(dentry, authfiles,
                        RPCAUTH_info, RPCAUTH_EOF);
        if (error)
@@ -732,8 +775,7 @@ out:
 err_depopulate:
        rpc_depopulate(dentry, RPCAUTH_info, RPCAUTH_EOF);
        __rpc_rmdir(dir, dentry);
-err_dput:
-       dput(dentry);
+out_err:
        printk(KERN_WARNING "%s: %s() failed to create directory %s (errno = %d)\n",
                        __FILE__, __func__, path, error);
        dentry = ERR_PTR(error);
@@ -787,9 +829,9 @@ struct dentry *rpc_mkpipe(struct dentry *parent, const char *name,
                          int flags)
 {
        struct dentry *dentry;
-       struct inode *dir, *inode;
-       struct rpc_inode *rpci;
+       struct inode *dir = parent->d_inode;
        umode_t umode = S_IFIFO | S_IRUSR | S_IWUSR;
+       int err;
 
        if (ops->upcall == NULL)
                umode &= ~S_IRUGO;
@@ -801,7 +843,7 @@ struct dentry *rpc_mkpipe(struct dentry *parent, const char *name,
                return dentry;
        dir = parent->d_inode;
        if (dentry->d_inode) {
-               rpci = RPC_I(dentry->d_inode);
+               struct rpc_inode *rpci = RPC_I(dentry->d_inode);
                if (rpci->private != private ||
                                rpci->ops != ops ||
                                rpci->flags != flags) {
@@ -811,28 +853,20 @@ struct dentry *rpc_mkpipe(struct dentry *parent, const char *name,
                rpci->nkern_readwriters++;
                goto out;
        }
-       inode = rpc_get_inode(dir->i_sb, umode);
-       if (!inode)
-               goto err_dput;
-       inode->i_ino = iunique(dir->i_sb, 100);
-       inode->i_fop = &rpc_pipe_fops;
-       d_instantiate(dentry, inode);
-       rpci = RPC_I(inode);
-       rpci->private = private;
-       rpci->flags = flags;
-       rpci->ops = ops;
-       rpci->nkern_readwriters = 1;
-       fsnotify_create(dir, dentry);
+
+       err = __rpc_mkpipe(dir, dentry, umode, &rpc_pipe_fops,
+                       private, ops, flags);
+       if (err)
+               goto out_err;
        dget(dentry);
 out:
        mutex_unlock(&dir->i_mutex);
        return dentry;
-err_dput:
-       dput(dentry);
-       dentry = ERR_PTR(-ENOMEM);
+out_err:
+       dentry = ERR_PTR(err);
        printk(KERN_WARNING "%s: %s() failed to create pipe %s/%s (errno = %d)\n",
                        __FILE__, __func__, parent->d_name.name, name,
-                       -ENOMEM);
+                       err);
        goto out;
 }
 EXPORT_SYMBOL_GPL(rpc_mkpipe);