integrity: move ima inode integrity data management

Move the inode integrity data(iint) management up to the integrity directory
in order to share the iint among the different integrity models.

Changelog:
- don't define MAX_DIGEST_SIZE
- rename several globally visible 'ima_' prefixed functions, structs,
  locks, etc to 'integrity_'
- replace '20' with SHA1_DIGEST_SIZE
- reflect location change in appropriate Kconfig and Makefiles
- remove unnecessary initialization of iint_initialized to 0
- rebased on current ima_iint.c
- define integrity_iint_store/lock as static

There should be no other functional changes.

Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Acked-by: Serge Hallyn <serge.hallyn@ubuntu.com>

1 files changed, 0 insertions, 169 deletions

diff --git a/security/integrity/ima/ima_iint.c b/security/integrity/ima/ima_iint.c
deleted file mode 100644
index 4ae73040ab7b..000000000000
--- a/security/integrity/ima/ima_iint.c
+++ /dev/null
@@ -1,169 +0,0 @@
-/*
- * Copyright (C) 2008 IBM Corporation
- *
- * Authors:
- * Mimi Zohar <zohar@us.ibm.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, version 2 of the
- * License.
- *
- * File: ima_iint.c
- * 	- implements the IMA hooks: ima_inode_alloc, ima_inode_free
- *	- cache integrity information associated with an inode
- *	  using a rbtree tree.
- */
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/spinlock.h>
-#include <linux/rbtree.h>
-#include "ima.h"
-
-static struct rb_root ima_iint_tree = RB_ROOT;
-static DEFINE_SPINLOCK(ima_iint_lock);
-static struct kmem_cache *iint_cache __read_mostly;
-
-int iint_initialized = 0;
-
-/*
- * __ima_iint_find - return the iint associated with an inode
- */
-static struct ima_iint_cache *__ima_iint_find(struct inode *inode)
-{
-	struct ima_iint_cache *iint;
-	struct rb_node *n = ima_iint_tree.rb_node;
-
-	assert_spin_locked(&ima_iint_lock);
-
-	while (n) {
-		iint = rb_entry(n, struct ima_iint_cache, rb_node);
-
-		if (inode < iint->inode)
-			n = n->rb_left;
-		else if (inode > iint->inode)
-			n = n->rb_right;
-		else
-			break;
-	}
-	if (!n)
-		return NULL;
-
-	return iint;
-}
-
-/*
- * ima_iint_find - return the iint associated with an inode
- */
-struct ima_iint_cache *ima_iint_find(struct inode *inode)
-{
-	struct ima_iint_cache *iint;
-
-	if (!IS_IMA(inode))
-		return NULL;
-
-	spin_lock(&ima_iint_lock);
-	iint = __ima_iint_find(inode);
-	spin_unlock(&ima_iint_lock);
-
-	return iint;
-}
-
-static void iint_free(struct ima_iint_cache *iint)
-{
-	iint->version = 0;
-	iint->flags = 0UL;
-	kmem_cache_free(iint_cache, iint);
-}
-
-/**
- * ima_inode_alloc - allocate an iint associated with an inode
- * @inode: pointer to the inode
- */
-int ima_inode_alloc(struct inode *inode)
-{
-	struct rb_node **p;
-	struct rb_node *new_node, *parent = NULL;
-	struct ima_iint_cache *new_iint, *test_iint;
-	int rc;
-
-	new_iint = kmem_cache_alloc(iint_cache, GFP_NOFS);
-	if (!new_iint)
-		return -ENOMEM;
-
-	new_iint->inode = inode;
-	new_node = &new_iint->rb_node;
-
-	mutex_lock(&inode->i_mutex); /* i_flags */
-	spin_lock(&ima_iint_lock);
-
-	p = &ima_iint_tree.rb_node;
-	while (*p) {
-		parent = *p;
-		test_iint = rb_entry(parent, struct ima_iint_cache, rb_node);
-
-		rc = -EEXIST;
-		if (inode < test_iint->inode)
-			p = &(*p)->rb_left;
-		else if (inode > test_iint->inode)
-			p = &(*p)->rb_right;
-		else
-			goto out_err;
-	}
-
-	inode->i_flags |= S_IMA;
-	rb_link_node(new_node, parent, p);
-	rb_insert_color(new_node, &ima_iint_tree);
-
-	spin_unlock(&ima_iint_lock);
-	mutex_unlock(&inode->i_mutex); /* i_flags */
-
-	return 0;
-out_err:
-	spin_unlock(&ima_iint_lock);
-	mutex_unlock(&inode->i_mutex); /* i_flags */
-	iint_free(new_iint);
-
-	return rc;
-}
-
-/**
- * ima_inode_free - called on security_inode_free
- * @inode: pointer to the inode
- *
- * Free the integrity information(iint) associated with an inode.
- */
-void ima_inode_free(struct inode *inode)
-{
-	struct ima_iint_cache *iint;
-
-	if (!IS_IMA(inode))
-		return;
-
-	spin_lock(&ima_iint_lock);
-	iint = __ima_iint_find(inode);
-	rb_erase(&iint->rb_node, &ima_iint_tree);
-	spin_unlock(&ima_iint_lock);
-
-	iint_free(iint);
-}
-
-static void init_once(void *foo)
-{
-	struct ima_iint_cache *iint = foo;
-
-	memset(iint, 0, sizeof *iint);
-	iint->version = 0;
-	iint->flags = 0UL;
-	mutex_init(&iint->mutex);
-}
-
-static int __init ima_iintcache_init(void)
-{
-	iint_cache =
-	    kmem_cache_create("iint_cache", sizeof(struct ima_iint_cache), 0,
-			      SLAB_PANIC, init_once);
-	iint_initialized = 1;
-	return 0;
-}
-security_initcall(ima_iintcache_init);