file.c

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/*
 * file.c
 *
 * Copyright (c) 1999 Al Smith
 *
 * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
 */

#include <linux/buffer_head.h>
#include "efs.h"

int efs_get_block(struct inode *inode, sector_t iblock,
          struct buffer_head *bh_result, int create)
{
    int error = -EROFS;
    long phys;

    if (create)
        return error;
    if (iblock >= inode->i_blocks) {
#ifdef DEBUG
        /*
         * i have no idea why this happens as often as it does
         */
        printk(KERN_WARNING "EFS: bmap(): block %d >= %ld (filesize %ld)\n",
            block,
            inode->i_blocks,
            inode->i_size);
#endif
        return 0;
    }
    phys = efs_map_block(inode, iblock);
    if (phys)
        map_bh(bh_result, inode->i_sb, phys);
    return 0;
}

int efs_bmap(struct inode *inode, efs_block_t block) {

    if (block < 0) {
        printk(KERN_WARNING "EFS: bmap(): block < 0\n");
        return 0;
    }

    /* are we about to read past the end of a file ? */
    if (!(block < inode->i_blocks)) {
#ifdef DEBUG
        /*
         * i have no idea why this happens as often as it does
         */
        printk(KERN_WARNING "EFS: bmap(): block %d >= %ld (filesize %ld)\n",
            block,
            inode->i_blocks,
            inode->i_size);
#endif
        return 0;
    }

    return efs_map_block(inode, block);
}