linux/fs/9p/vfs_dir.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * This file contains vfs directory ops for the 9P2000 protocol.
 *
 *  Copyright (C) 2004 by Eric Van Hensbergen <[email protected]>
 *  Copyright (C) 2002 by Ron Minnich <[email protected]>
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/uio.h>
#include <linux/fscache.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>

#include "v9fs.h"
#include "v9fs_vfs.h"
#include "fid.h"

/**
 * struct p9_rdir - readdir accounting
 * @head: start offset of current dirread buffer
 * @tail: end offset of current dirread buffer
 * @buf: dirread buffer
 *
 * private structure for keeping track of readdir
 * allocated on demand
 */

struct p9_rdir { … };

/**
 * dt_type - return file type
 * @mistat: mistat structure
 *
 */

static inline int dt_type(struct p9_wstat *mistat)
{ … }

/**
 * v9fs_alloc_rdir_buf - Allocate buffer used for read and readdir
 * @filp: opened file structure
 * @buflen: Length in bytes of buffer to allocate
 *
 */

static struct p9_rdir *v9fs_alloc_rdir_buf(struct file *filp, int buflen)
{ … }

/**
 * v9fs_dir_readdir - iterate through a directory
 * @file: opened file structure
 * @ctx: actor we feed the entries to
 *
 */

static int v9fs_dir_readdir(struct file *file, struct dir_context *ctx)
{ … }

/**
 * v9fs_dir_readdir_dotl - iterate through a directory
 * @file: opened file structure
 * @ctx: actor we feed the entries to
 *
 */
static int v9fs_dir_readdir_dotl(struct file *file, struct dir_context *ctx)
{ … }


/**
 * v9fs_dir_release - close a directory or a file
 * @inode: inode of the directory or file
 * @filp: file pointer to a directory or file
 *
 */

int v9fs_dir_release(struct inode *inode, struct file *filp)
{ … }

const struct file_operations v9fs_dir_operations = …;

const struct file_operations v9fs_dir_operations_dotl = …;