openwrt/target/linux/generic/patches-2.6.31/971-ocf_20100325.patch

--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -129,6 +129,9 @@
  *                                unsigned int value);
  * 	void add_interrupt_randomness(int irq);
  *
+ *      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.
  *
@@ -140,6 +143,13 @@
  * a better measure, since the timing of the disk interrupts are more
  * unpredictable.
  *
+ * 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.
@@ -712,6 +722,61 @@ void add_disk_randomness(struct gendisk 
 }
 #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);
+
+	DEBUG_ENT("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_thresh)
+		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_thresh);
+
+	count = random_write_wakeup_thresh - input_pool.entropy_count;
+
+        /* likely we got woken up due to a signal */
+	if (count <= 0) count = random_read_wakeup_thresh; 
+
+	DEBUG_ENT("requesting %d bits from input_wait()er %d<%d\n",
+		  count,
+		  input_pool.entropy_count, random_write_wakeup_thresh);
+
+	return count;
+}
+EXPORT_SYMBOL(random_input_wait);
+
+
 #define EXTRACT_SIZE 10
 
 /*********************************************************************
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -141,6 +141,7 @@ SYSCALL_DEFINE1(dup, unsigned int, filde
 	}
 	return ret;
 }
+EXPORT_SYMBOL(sys_dup);
 
 #define SETFL_MASK (O_APPEND | O_NONBLOCK | O_NDELAY | O_DIRECT | O_NOATIME)
 
--- a/include/linux/miscdevice.h
+++ b/include/linux/miscdevice.h
@@ -12,6 +12,7 @@
 #define APOLLO_MOUSE_MINOR	7
 #define PC110PAD_MINOR		9
 /*#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/linux/random.h
+++ b/include/linux/random.h
@@ -9,6 +9,7 @@
 
 #include <linux/types.h>
 #include <linux/ioctl.h>
+#include <linux/types.h> /* for __u32 in user space */
 #include <linux/irqnr.h>
 
 /* ioctl()'s for the random number generator */
@@ -34,6 +35,30 @@
 /* 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;
@@ -50,6 +75,10 @@ extern void add_input_randomness(unsigne
 				 unsigned int value);
 extern void add_interrupt_randomness(int irq);
 
+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);
 void generate_random_uuid(unsigned char uuid_out[16]);
 
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -387,6 +387,7 @@ struct task_struct *find_task_by_vpid(pi
 {
 	return find_task_by_pid_ns(vnr, current->nsproxy->pid_ns);
 }
+EXPORT_SYMBOL(find_task_by_vpid);
 
 struct pid *get_task_pid(struct task_struct *task, enum pid_type type)
 {