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/*

 *  linux/fs/affs/symlink.c

 *

 *  1995  Hans-Joachim Widmaier - Modified for affs.

 *

 *  Copyright (C) 1991, 1992  Linus Torvalds

 *

 *  affs symlink handling code

 */

#include <linux/errno.h>

#include <linux/fs.h>

#include <linux/stat.h>

#include <linux/affs_fs.h>

#include <linux/amigaffs.h>

#include <linux/pagemap.h>

#include <linux/smp_lock.h>

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

{

        struct buffer_head *bh;

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

        char *link = kmap(page);

        struct slink_front *lf;

        int err;

        int                      i, j;

        char                     c;

        char                     lc;

        char                    *pf;

        pr_debug("AFFS: follow_link(ino=%lu)\n",inode->i_ino);

        err = -EIO;

        lock_kernel();

        bh = affs_bread(inode->i_sb, inode->i_ino);

        unlock_kernel();

        if (!bh)

                goto fail;

        i  = 0;

        j  = 0;

        lf = (struct slink_front *)bh->b_data;

        lc = 0;

        pf = inode->i_sb->u.affs_sb.s_prefix ? inode->i_sb->u.affs_sb.s_prefix : "/";

        if (strchr(lf->symname,':')) {  /* Handle assign or volume name */

                while (i < 1023 && (c = pf[i]))

                        link[i++] = c;

                while (i < 1023 && lf->symname[j] != ':')

                        link[i++] = lf->symname[j++];

                if (i < 1023)

                        link[i++] = '/';

                j++;

                lc = '/';

        }

        while (i < 1023 && (c = lf->symname[j])) {

                if (c == '/' && lc == '/' && i < 1020) {        /* parent dir */

                        link[i++] = '.';

                        link[i++] = '.';

                }

                link[i++] = c;

                lc = c;

                j++;

        }

        link[i] = '\0';

        lock_kernel();

        affs_brelse(bh);

        unlock_kernel();

        SetPageUptodate(page);

        kunmap(page);

        UnlockPage(page);

        return 0;

fail:

        SetPageError(page);

        kunmap(page);

        UnlockPage(page);

        return err;

}

struct address_space_operations affs_symlink_aops = {

        readpage:       affs_symlink_readpage,

};

struct inode_operations affs_symlink_inode_operations = {

        readlink:       page_readlink,

        follow_link:    page_follow_link,

        setattr:        affs_notify_change,

};