1 files changed, 81 insertions, 0 deletions

diff --git a/fs/ext2/ioctl.c b/fs/ext2/ioctl.c
new file mode 100644
index 000000000000..709d8676b962
--- /dev/null
+++ b/fs/ext2/ioctl.c
@@ -0,0 +1,81 @@
+/*
+ * linux/fs/ext2/ioctl.c
+ *
+ * Copyright (C) 1993, 1994, 1995
+ * Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ */
+
+#include "ext2.h"
+#include <linux/time.h>
+#include <linux/sched.h>
+#include <asm/current.h>
+#include <asm/uaccess.h>
+
+
+int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
+                unsigned long arg)
+{
+        struct ext2_inode_info *ei = EXT2_I(inode);
+        unsigned int flags;
+
+        ext2_debug ("cmd = %u, arg = %lu\n", cmd, arg);
+
+        switch (cmd) {
+        case EXT2_IOC_GETFLAGS:
+                flags = ei->i_flags & EXT2_FL_USER_VISIBLE;
+                return put_user(flags, (int __user *) arg);
+        case EXT2_IOC_SETFLAGS: {
+                unsigned int oldflags;
+
+                if (IS_RDONLY(inode))
+                        return -EROFS;
+
+                if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+                        return -EACCES;
+
+                if (get_user(flags, (int __user *) arg))
+                        return -EFAULT;
+
+                if (!S_ISDIR(inode->i_mode))
+                        flags &= ~EXT2_DIRSYNC_FL;
+
+                oldflags = ei->i_flags;
+
+                /*
+                 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
+                 * the relevant capability.
+                 *
+                 * This test looks nicer. Thanks to Pauline Middelink
+                 */
+                if ((flags ^ oldflags) & (EXT2_APPEND_FL | EXT2_IMMUTABLE_FL)) {
+                        if (!capable(CAP_LINUX_IMMUTABLE))
+                                return -EPERM;
+                }
+
+                flags = flags & EXT2_FL_USER_MODIFIABLE;
+                flags |= oldflags & ~EXT2_FL_USER_MODIFIABLE;
+                ei->i_flags = flags;
+
+                ext2_set_inode_flags(inode);
+                inode->i_ctime = CURRENT_TIME_SEC;
+                mark_inode_dirty(inode);
+                return 0;
+        }
+        case EXT2_IOC_GETVERSION:
+                return put_user(inode->i_generation, (int __user *) arg);
+        case EXT2_IOC_SETVERSION:
+                if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+                        return -EPERM;
+                if (IS_RDONLY(inode))
+                        return -EROFS;
+                if (get_user(inode->i_generation, (int __user *) arg))
+                        return -EFAULT; 
+                inode->i_ctime = CURRENT_TIME_SEC;
+                mark_inode_dirty(inode);
+                return 0;
+        default:
+                return -ENOTTY;
+        }
+}