root/fs/smbfs/symlink.c

DEFINITIONS

1. smb_symlink
2. smb_follow_link
3. smb_put_link

/*
 *  symlink.c
 *
 *  Copyright (C) 2002 by John Newbigin
 *
 *  Please add a note about your changes to smbfs in the ChangeLog file.
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/fcntl.h>
#include <linux/stat.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
#include <linux/net.h>
#include <linux/namei.h>

#include <asm/uaccess.h>
#include <asm/system.h>

#include <linux/smbno.h>
#include <linux/smb_fs.h>

#include "smb_debug.h"
#include "proto.h"

int smb_symlink(struct inode *inode, struct dentry *dentry, const char *oldname)
{
        DEBUG1("create symlink %s -> %s/%s\n", oldname, DENTRY_PATH(dentry));

        return smb_proc_symlink(server_from_dentry(dentry), dentry, oldname);
}

static void *smb_follow_link(struct dentry *dentry, struct nameidata *nd)
{
        char *link = __getname();
        DEBUG1("followlink of %s/%s\n", DENTRY_PATH(dentry));

        if (!link) {
                link = ERR_PTR(-ENOMEM);
        } else {
                int len = smb_proc_read_link(server_from_dentry(dentry),
                                                dentry, link, PATH_MAX - 1);
                if (len < 0) {
                        __putname(link);
                        link = ERR_PTR(len);
                } else {
                        link[len] = 0;
                }
        }
        nd_set_link(nd, link);
        return NULL;
}

static void smb_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
{
        char *s = nd_get_link(nd);
        if (!IS_ERR(s))
                __putname(s);
}

const struct inode_operations smb_link_inode_operations =
{
        .readlink       = generic_readlink,
        .follow_link    = smb_follow_link,
        .put_link       = smb_put_link,
};