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/*
* linux/fs/ext2/acl.c
*
* Copyright (C) 1993, 1994 Remy Card (card@masi.ibp.fr)
* Laboratoire MASI - Institut Blaise Pascal
* Universite Pierre et Marie Curie (Paris VI)
*/
/*
* This file will contain the Access Control Lists management for the
* second extended file system.
*/
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/ext2_fs.h>
#include <linux/sched.h>
#include <linux/stat.h>
/*
* ext2_permission ()
*
* Check for access rights
*/
int ext2_permission (struct inode * inode, int mask)
{
unsigned short mode = inode->i_mode;
/*
* Special case, access is always granted for root
*/
if (suser ())
return 1;
/*
* If no ACL, checks using the file mode
*/
else if (current->euid == inode->i_uid)
mode >>= 6;
else if (in_group_p (inode->i_gid))
mode >>= 3;
if (((mode & mask & S_IRWXO) == mask))
return 1;
else
return 0;
}