From b4c1ecb3c841e0d7f7453a93c30a5619b7f3ce4c Mon Sep 17 00:00:00 2001
From: Nikos Mavrogiannopoulos <nmav@gnutls.org>
Date: Mon, 31 May 2010 16:35:28 +0200
Subject: Added deinitialization of limits on module unloading. Better cleanup
 of unused data.

---
 cryptodev_main.c |  3 +++
 ncr-data.c       |  9 +++++++--
 ncr-limits.c     | 21 +++++++++++++++++++++
 ncr.c            |  3 ---
 ncr_int.h        |  1 +
 5 files changed, 32 insertions(+), 5 deletions(-)

diff --git a/cryptodev_main.c b/cryptodev_main.c
index da7ef2b..460e3d3 100644
--- a/cryptodev_main.c
+++ b/cryptodev_main.c
@@ -728,6 +728,8 @@ cryptodev_register(void)
 {
 	int rc;
 
+	ncr_limits_init();
+
 	rc = misc_register (&cryptodev);
 	if (unlikely(rc)) {
 		printk(KERN_ERR PFX "registeration of /dev/crypto failed\n");
@@ -740,6 +742,7 @@ cryptodev_register(void)
 static void
 cryptodev_deregister(void)
 {
+	ncr_limits_deinit();
 	misc_deregister(&cryptodev);
 }
 
diff --git a/ncr-data.c b/ncr-data.c
index 2c4c3ac..226c6e4 100644
--- a/ncr-data.c
+++ b/ncr-data.c
@@ -182,6 +182,7 @@ int ncr_data_get(struct list_sem_st* lst, void __user* arg)
 	struct ncr_data_st get;
 	struct data_item * data;
 	size_t len;
+	int ret;
 	
 	copy_from_user( &get, arg, sizeof(get));
 
@@ -194,7 +195,8 @@ int ncr_data_get(struct list_sem_st* lst, void __user* arg)
 
 	if (!(data->flags & NCR_DATA_FLAG_EXPORTABLE)) {
 		err();
-		return -EPERM;
+		ret = -EPERM;
+		goto cleanup;
 	}
 
 	len = min(get.data_size, data->data_size);
@@ -206,9 +208,12 @@ int ncr_data_get(struct list_sem_st* lst, void __user* arg)
 	if (len > 0)
 		copy_to_user(get.data, data->data, len);
 
+	ret = 0;
+
+cleanup:
 	_ncr_data_item_put( data);
 
-	return 0;
+	return ret;
 }
 
 int ncr_data_set(struct list_sem_st* lst, void __user* arg)
diff --git a/ncr-limits.c b/ncr-limits.c
index df6be74..63b4d8b 100644
--- a/ncr-limits.c
+++ b/ncr-limits.c
@@ -72,6 +72,27 @@ void ncr_limits_init(void)
 	INIT_LIST_HEAD(&limits.processes.list);
 }
 
+void ncr_limits_deinit(void)
+{
+struct limit_process_item_st* pitem, *ptmp;
+struct limit_user_item_st* uitem, *utmp;
+
+	down(&limits.users.sem);
+	list_for_each_entry_safe(uitem, utmp, &limits.users.list, list) {
+		list_del(&uitem->list);
+		kfree(uitem);
+	}
+	up(&limits.users.sem);
+	
+	down(&limits.processes.sem);
+	list_for_each_entry_safe(pitem, ptmp, &limits.processes.list, list) {
+		list_del(&pitem->list);
+		kfree(pitem);
+	}
+	up(&limits.processes.sem);
+
+}
+
 int ncr_limits_add_and_check(struct file *filp, limits_type_t type)
 {
 struct limit_process_item_st* pitem;
diff --git a/ncr.c b/ncr.c
index e0748f3..c9cc664 100644
--- a/ncr.c
+++ b/ncr.c
@@ -50,8 +50,6 @@ void* ncr_init_lists(void)
 	init_MUTEX(&lst->key.sem);
 	INIT_LIST_HEAD(&lst->key.list);
 
-	ncr_limits_init();
-
 	return lst;
 }
 
@@ -60,7 +58,6 @@ void ncr_deinit_lists(struct ncr_lists *lst)
 	if(lst) {
 		ncr_data_list_deinit(&lst->data);
 		ncr_key_list_deinit(&lst->key);
-
 		kfree(lst);
 	}
 }
diff --git a/ncr_int.h b/ncr_int.h
index 1b49540..5493320 100644
--- a/ncr_int.h
+++ b/ncr_int.h
@@ -98,6 +98,7 @@ typedef enum {
 void ncr_limits_remove(struct file *filp, limits_type_t type);
 int ncr_limits_add_and_check(struct file *filp, limits_type_t type);
 void ncr_limits_init(void);
+void ncr_limits_deinit(void);
 
 ncr_key_type_t ncr_algorithm_to_key_type(ncr_algorithm_t algo);
 
-- 
cgit