linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 *  linux/fs/affs/dir.c

 *

 *  (c) 1996  Hans-Joachim Widmaier - Rewritten

 *

 *  (C) 1993  Ray Burr - Modified for Amiga FFS filesystem.

 *

 *  (C) 1992  Eric Youngdale Modified for ISO 9660 filesystem.

 *

 *  (C) 1991  Linus Torvalds - minix filesystem

 *

 *  affs directory handling functions

 *

 */

​

#include <linux/iversion.h>

#include "affs.h"

​

static int affs_readdir(struct file *, struct dir_context *);

​

const struct file_operations affs_dir_operations = {

    .read       = generic_read_dir,

    .llseek     = generic_file_llseek,

    .iterate_shared = affs_readdir,

    .fsync      = affs_file_fsync,

};

​

/*

 * directories can handle most operations...

 */

const struct inode_operations affs_dir_inode_operations = {

    .create     = affs_create,

    .lookup     = affs_lookup,

    .link       = affs_link,

    .unlink     = affs_unlink,

    .symlink    = affs_symlink,

    .mkdir      = affs_mkdir,

    .rmdir      = affs_rmdir,

    .rename     = affs_rename2,

    .setattr    = affs_notify_change,

};

​

static int

affs_readdir(struct file *file, struct dir_context *ctx)

{

    struct inode        *inode = file_inode(file);

    struct super_block  *sb = inode->i_sb;

    struct buffer_head  *dir_bh = NULL;

    struct buffer_head  *fh_bh = NULL;

    unsigned char       *name;

    int          namelen;

    u32          i;

    int          hash_pos;

    int          chain_pos;

    u32          ino;

    int          error = 0;

​

    pr_debug("%s(ino=%lu,f_pos=%llx)\n", __func__, inode->i_ino, ctx->pos);

​

    if (ctx->pos < 2) {

        file->private_data = (void *)0;

        if (!dir_emit_dots(file, ctx))