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/*

 * symlink.c

 *

 * Copyright (c) 1999 Al Smith

 *

 * Portions derived from work (c) 1995,1996 Christian Vogelgsang.

 */

#include <linux/string.h>

#include <linux/efs_fs.h>

#include <linux/pagemap.h>

#include <linux/smp_lock.h>

static int efs_symlink_readpage(struct file *file, struct page *page)

{

        char *link = kmap(page);

        struct buffer_head * bh;

        struct inode * inode = page->mapping->host;

        efs_block_t size = inode->i_size;

        int err;

        err = -ENAMETOOLONG;

        if (size > 2 * EFS_BLOCKSIZE)

                goto fail;

        lock_kernel();

        /* read first 512 bytes of link target */

        err = -EIO;

        bh = sb_bread(inode->i_sb, efs_bmap(inode, 0));

        if (!bh)

                goto fail;

        memcpy(link, bh->b_data, (size > EFS_BLOCKSIZE) ? EFS_BLOCKSIZE : size);

        brelse(bh);

        if (size > EFS_BLOCKSIZE) {

                bh = sb_bread(inode->i_sb, efs_bmap(inode, 1));

                if (!bh)

                        goto fail;

                memcpy(link + EFS_BLOCKSIZE, bh->b_data, size - EFS_BLOCKSIZE);

                brelse(bh);

        }

        link[size] = '\0';

        unlock_kernel();

        SetPageUptodate(page);

        kunmap(page);

        UnlockPage(page);

        return 0;

fail:

        unlock_kernel();

        SetPageError(page);

        kunmap(page);

        UnlockPage(page);

        return err;

}

struct address_space_operations efs_symlink_aops = {

        readpage:       efs_symlink_readpage

};