| /* |
| * linux/fs/ext2/acl.c |
| * |
| * Copyright (C) 1993 Remy Card (card@masi.ibp.fr) |
| */ |
| |
| /* |
| * This file will contain the Access Control Lists management for the |
| * second extended file system. |
| */ |
| |
| #include <linux/sched.h> |
| #include <linux/ext2_fs.h> |
| #include <linux/errno.h> |
| #include <linux/stat.h> |
| |
| /* |
| * ext2_permission () |
| * |
| * Check for access rights |
| */ |
| int ext2_permission (struct inode * inode, int mask) |
| { |
| int 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; |
| } |
