openwrt_archive/target/linux/generic/patches-4.4/941-ocf_20120127.patch

--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -139,6 +139,9 @@
  * that might otherwise be identical and have very little entropy
  * available to them (particularly common in the embedded world).
  *
+ *      void random_input_words(__u32 *buf, size_t wordcount, int ent_count)
+ *      int random_input_wait(void);
+ *
  * add_input_randomness() uses the input layer interrupt timing, as well as
  * the event type information from the hardware.
  *
@@ -152,6 +155,13 @@
  * seek times do not make for good sources of entropy, as their seek
  * times are usually fairly consistent.
  *
+ * random_input_words() just provides a raw block of entropy to the input
+ * pool, such as from a hardware entropy generator.
+ *
+ * random_input_wait() suspends the caller until such time as the
+ * entropy pool falls below the write threshold, and returns a count of how
+ * much entropy (in bits) is needed to sustain the pool.
+ *
  * All of these routines try to estimate how many bits of randomness a
  * particular randomness source.  They do this by keeping track of the
  * first and second order deltas of the event timings.
@@ -958,6 +968,63 @@ void add_disk_randomness(struct gendisk
 EXPORT_SYMBOL_GPL(add_disk_randomness);
 #endif
 
+/*
+ * random_input_words - add bulk entropy to pool
+ *
+ * @buf: buffer to add
+ * @wordcount: number of __u32 words to add
+ * @ent_count: total amount of entropy (in bits) to credit
+ *
+ * this provides bulk input of entropy to the input pool
+ *
+ */
+void random_input_words(__u32 *buf, size_t wordcount, int ent_count)
+{
+	mix_pool_bytes(&input_pool, buf, wordcount*4);
+
+	credit_entropy_bits(&input_pool, ent_count);
+
+	pr_notice("crediting %d bits => %d\n",
+		  ent_count, input_pool.entropy_count);
+	/*
+	 * Wake up waiting processes if we have enough
+	 * entropy.
+	 */
+	if (input_pool.entropy_count >= random_read_wakeup_bits)
+		wake_up_interruptible(&random_read_wait);
+}
+EXPORT_SYMBOL(random_input_words);
+
+/*
+ * random_input_wait - wait until random needs entropy
+ *
+ * this function sleeps until the /dev/random subsystem actually
+ * needs more entropy, and then return the amount of entropy
+ * that it would be nice to have added to the system.
+ */
+int random_input_wait(void)
+{
+	int count;
+
+	wait_event_interruptible(random_write_wait, 
+			 input_pool.entropy_count < random_write_wakeup_bits);
+
+	count = random_write_wakeup_bits - input_pool.entropy_count;
+
+        /* likely we got woken up due to a signal */
+	if (count <= 0) count = random_read_wakeup_bits; 
+
+	pr_notice("requesting %d bits from input_wait()er %d<%d\n",
+		  count,
+		  input_pool.entropy_count, random_write_wakeup_bits);
+
+	return count;
+}
+EXPORT_SYMBOL(random_input_wait);
+
+
+#define EXTRACT_SIZE 10
+
 /*********************************************************************
  *
  * Entropy extraction routines
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -140,6 +140,7 @@ pid_t f_getown(struct file *filp)
 	read_unlock(&filp->f_owner.lock);
 	return pid;
 }
+EXPORT_SYMBOL(sys_dup);
 
 static int f_setown_ex(struct file *filp, unsigned long arg)
 {
--- a/include/linux/miscdevice.h
+++ b/include/linux/miscdevice.h
@@ -19,6 +19,7 @@
 #define APOLLO_MOUSE_MINOR	7	/* unused */
 #define PC110PAD_MINOR		9	/* unused */
 /*#define ADB_MOUSE_MINOR	10	FIXME OBSOLETE */
+#define CRYPTODEV_MINOR		70	/* /dev/crypto */
 #define WATCHDOG_MINOR		130	/* Watchdog timer     */
 #define TEMP_MINOR		131	/* Temperature Sensor */
 #define RTC_MINOR		135
--- a/include/uapi/linux/random.h
+++ b/include/uapi/linux/random.h
@@ -34,6 +34,30 @@
 /* Clear the entropy pool and associated counters.  (Superuser only.) */
 #define RNDCLEARPOOL	_IO( 'R', 0x06 )
 
+#ifdef CONFIG_FIPS_RNG
+
+/* Size of seed value - equal to AES blocksize */
+#define AES_BLOCK_SIZE_BYTES	16
+#define SEED_SIZE_BYTES			AES_BLOCK_SIZE_BYTES
+/* Size of AES key */
+#define KEY_SIZE_BYTES		16
+
+/* ioctl() structure used by FIPS 140-2 Tests */
+struct rand_fips_test {
+	unsigned char key[KEY_SIZE_BYTES];			/* Input */
+	unsigned char datetime[SEED_SIZE_BYTES];	/* Input */
+	unsigned char seed[SEED_SIZE_BYTES];		/* Input */
+	unsigned char result[SEED_SIZE_BYTES];		/* Output */
+};
+
+/* FIPS 140-2 RNG Variable Seed Test. (Superuser only.) */
+#define RNDFIPSVST	_IOWR('R', 0x10, struct rand_fips_test)
+
+/* FIPS 140-2 RNG Monte Carlo Test. (Superuser only.) */
+#define RNDFIPSMCT	_IOWR('R', 0x11, struct rand_fips_test)
+
+#endif /* #ifdef CONFIG_FIPS_RNG */
+
 struct rand_pool_info {
 	int	entropy_count;
 	int	buf_size;
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -22,6 +22,10 @@ extern void add_input_randomness(unsigne
 				 unsigned int value);
 extern void add_interrupt_randomness(int irq, int irq_flags);
 
+extern void random_input_words(__u32 *buf, size_t wordcount, int ent_count);
+extern int random_input_wait(void);
+#define HAS_RANDOM_INPUT_WAIT 1
+
 extern void get_random_bytes(void *buf, int nbytes);
 extern int add_random_ready_callback(struct random_ready_callback *rdy);
 extern void del_random_ready_callback(struct random_ready_callback *rdy);
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -431,6 +431,7 @@ void transfer_pid(struct task_struct *ol
 	new->pids[type].pid = old->pids[type].pid;
 	hlist_replace_rcu(&old->pids[type].node, &new->pids[type].node);
 }
+EXPORT_SYMBOL(find_task_by_vpid);
 
 struct task_struct *pid_task(struct pid *pid, enum pid_type type)
 {