busybox

/* vi: set sw=4 ts=4: */

/*

 * block.c --- iterate over all blocks in an inode

 *

 * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.

 *

 * %Begin-Header%

 * This file may be redistributed under the terms of the GNU Public

 * License.

 * %End-Header%

 */

​

#include <stdio.h>

#include <string.h>

#if HAVE_UNISTD_H

#include <unistd.h>

#endif

​

#include "ext2_fs.h"

#include "ext2fs.h"

​

struct block_context {

    ext2_filsys fs;

    int (*func)(ext2_filsys fs,

            blk_t   *blocknr,

            e2_blkcnt_t bcount,

            blk_t   ref_blk,

            int     ref_offset,

            void    *priv_data);

    e2_blkcnt_t bcount;

    int     bsize;

    int     flags;

    errcode_t   errcode;

    char    *ind_buf;

    char    *dind_buf;

    char    *tind_buf;

    void    *priv_data;

};

​

static int block_iterate_ind(blk_t *ind_block, blk_t ref_block,

                 int ref_offset, struct block_context *ctx)

{

    int ret = 0, changed = 0;

    int i, flags, limit, offset;

    blk_t   *block_nr;

​

    limit = ctx->fs->blocksize >> 2;

    if (!(ctx->flags & BLOCK_FLAG_DEPTH_TRAVERSE) &&

        !(ctx->flags & BLOCK_FLAG_DATA_ONLY))

        ret = (*ctx->func)(ctx->fs, ind_block,

                   BLOCK_COUNT_IND, ref_block,

                   ref_offset, ctx->priv_data);

    if (!*ind_block || (ret & BLOCK_ABORT)) {

        ctx->bcount += limit;

        return ret;

    }

    if (*ind_block >= ctx->fs->super->s_blocks_count ||

        *ind_block < ctx->fs->super->s_first_data_block) {

        ctx->errcode = EXT2_ET_BAD_IND_BLOCK;

        ret |= BLOCK_ERROR;

        return ret;

    }

    ctx->errcode = ext2fs_read_ind_block(ctx->fs, *ind_block,