target/linux/generic-2.6/patches-2.6.27/971-ocf_20080917.patch

   1 --- a/drivers/char/random.c
   2 +++ b/drivers/char/random.c
   3 @@ -129,6 +129,9 @@
   4   *                                unsigned int value);
   5   *     void add_interrupt_randomness(int irq);
   6   *
   7 + *      void random_input_words(__u32 *buf, size_t wordcount, int ent_count)
   8 + *      int random_input_wait(void);
   9 + *
  10   * add_input_randomness() uses the input layer interrupt timing, as well as
  11   * the event type information from the hardware.
  12   *
  13 @@ -140,6 +143,13 @@
  14   * a better measure, since the timing of the disk interrupts are more
  15   * unpredictable.
  16   *
  17 + * random_input_words() just provides a raw block of entropy to the input
  18 + * pool, such as from a hardware entropy generator.
  19 + *
  20 + * random_input_wait() suspends the caller until such time as the
  21 + * entropy pool falls below the write threshold, and returns a count of how
  22 + * much entropy (in bits) is needed to sustain the pool.
  23 + *
  24   * All of these routines try to estimate how many bits of randomness a
  25   * particular randomness source.  They do this by keeping track of the
  26   * first and second order deltas of the event timings.
  27 @@ -668,6 +678,61 @@ void add_disk_randomness(struct gendisk
  28  }
  29  #endif
  30
  31 +/*
  32 + * random_input_words - add bulk entropy to pool
  33 + *
  34 + * @buf: buffer to add
  35 + * @wordcount: number of __u32 words to add
  36 + * @ent_count: total amount of entropy (in bits) to credit
  37 + *
  38 + * this provides bulk input of entropy to the input pool
  39 + *
  40 + */
  41 +void random_input_words(__u32 *buf, size_t wordcount, int ent_count)
  42 +{
  43 +       mix_pool_bytes(&input_pool, buf, wordcount*4);
  44 +
  45 +       credit_entropy_bits(&input_pool, ent_count);
  46 +
  47 +       DEBUG_ENT("crediting %d bits => %d\n",
  48 +                 ent_count, input_pool.entropy_count);
  49 +       /*
  50 +        * Wake up waiting processes if we have enough
  51 +        * entropy.
  52 +        */
  53 +       if (input_pool.entropy_count >= random_read_wakeup_thresh)
  54 +               wake_up_interruptible(&random_read_wait);
  55 +}
  56 +EXPORT_SYMBOL(random_input_words);
  57 +
  58 +/*
  59 + * random_input_wait - wait until random needs entropy
  60 + *
  61 + * this function sleeps until the /dev/random subsystem actually
  62 + * needs more entropy, and then return the amount of entropy
  63 + * that it would be nice to have added to the system.
  64 + */
  65 +int random_input_wait(void)
  66 +{
  67 +       int count;
  68 +
  69 +       wait_event_interruptible(random_write_wait,
  70 +                        input_pool.entropy_count < random_write_wakeup_thresh);
  71 +
  72 +       count = random_write_wakeup_thresh - input_pool.entropy_count;
  73 +
  74 +        /* likely we got woken up due to a signal */
  75 +       if (count <= 0) count = random_read_wakeup_thresh;
  76 +
  77 +       DEBUG_ENT("requesting %d bits from input_wait()er %d<%d\n",
  78 +                 count,
  79 +                 input_pool.entropy_count, random_write_wakeup_thresh);
  80 +
  81 +       return count;
  82 +}
  83 +EXPORT_SYMBOL(random_input_wait);
  84 +
  85 +
  86  #define EXTRACT_SIZE 10
  87
  88  /*********************************************************************
  89 --- a/fs/fcntl.c
  90 +++ b/fs/fcntl.c
  91 @@ -140,6 +140,7 @@ asmlinkage long sys_dup(unsigned int fil
  92         }
  93         return ret;
  94  }
  95 +EXPORT_SYMBOL(sys_dup);
  96
  97  #define SETFL_MASK (O_APPEND | O_NONBLOCK | O_NDELAY | FASYNC | O_DIRECT | O_NOATIME)
  98
  99 --- a/include/linux/miscdevice.h
 100 +++ b/include/linux/miscdevice.h
 101 @@ -12,6 +12,7 @@
 102  #define APOLLO_MOUSE_MINOR 7
 103  #define PC110PAD_MINOR 9
 104  /*#define ADB_MOUSE_MINOR 10   FIXME OBSOLETE */
 105 +#define CRYPTODEV_MINOR                70      /* /dev/crypto */
 106  #define WATCHDOG_MINOR         130     /* Watchdog timer     */
 107  #define TEMP_MINOR             131     /* Temperature Sensor */
 108  #define RTC_MINOR 135
 109 --- a/include/linux/random.h
 110 +++ b/include/linux/random.h
 111 @@ -8,6 +8,7 @@
 112  #define _LINUX_RANDOM_H
 113
 114  #include <linux/ioctl.h>
 115 +#include <linux/types.h> /* for __u32 in user space */
 116
 117  /* ioctl()'s for the random number generator */
 118
 119 @@ -32,6 +33,30 @@
 120  /* Clear the entropy pool and associated counters.  (Superuser only.) */
 121  #define RNDCLEARPOOL   _IO( 'R', 0x06 )
 122
 123 +#ifdef CONFIG_FIPS_RNG
 124 +
 125 +/* Size of seed value - equal to AES blocksize */
 126 +#define AES_BLOCK_SIZE_BYTES   16
 127 +#define SEED_SIZE_BYTES                        AES_BLOCK_SIZE_BYTES
 128 +/* Size of AES key */
 129 +#define KEY_SIZE_BYTES         16
 130 +
 131 +/* ioctl() structure used by FIPS 140-2 Tests */
 132 +struct rand_fips_test {
 133 +       unsigned char key[KEY_SIZE_BYTES];                      /* Input */
 134 +       unsigned char datetime[SEED_SIZE_BYTES];        /* Input */
 135 +       unsigned char seed[SEED_SIZE_BYTES];            /* Input */
 136 +       unsigned char result[SEED_SIZE_BYTES];          /* Output */
 137 +};
 138 +
 139 +/* FIPS 140-2 RNG Variable Seed Test. (Superuser only.) */
 140 +#define RNDFIPSVST     _IOWR('R', 0x10, struct rand_fips_test)
 141 +
 142 +/* FIPS 140-2 RNG Monte Carlo Test. (Superuser only.) */
 143 +#define RNDFIPSMCT     _IOWR('R', 0x11, struct rand_fips_test)
 144 +
 145 +#endif /* #ifdef CONFIG_FIPS_RNG */
 146 +
 147  struct rand_pool_info {
 148         int     entropy_count;
 149         int     buf_size;
 150 @@ -48,6 +73,10 @@ extern void add_input_randomness(unsigne
 151                                  unsigned int value);
 152  extern void add_interrupt_randomness(int irq);
 153
 154 +extern void random_input_words(__u32 *buf, size_t wordcount, int ent_count);
 155 +extern int random_input_wait(void);
 156 +#define HAS_RANDOM_INPUT_WAIT 1
 157 +
 158  extern void get_random_bytes(void *buf, int nbytes);
 159  void generate_random_uuid(unsigned char uuid_out[16]);
 160