Root/target/linux/generic/patches-3.6/941-ocf_20120127.patch

1--- a/drivers/char/random.c
2+++ b/drivers/char/random.c
3@@ -139,6 +139,9 @@
4  * that might otherwise be identical and have very little entropy
5  * available to them (particularly common in the embedded world).
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@@ -152,6 +155,13 @@
14  * seek times do not make for good sources of entropy, as their seek
15  * times are usually fairly consistent.
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@@ -799,6 +809,63 @@ 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, NULL);
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  *
90  * Entropy extraction routines
91--- a/fs/fcntl.c
92+++ b/fs/fcntl.c
93@@ -143,6 +143,7 @@ SYSCALL_DEFINE1(dup, unsigned int, filde
94     }
95     return ret;
96 }
97+EXPORT_SYMBOL(sys_dup);
98 
99 #define SETFL_MASK (O_APPEND | O_NONBLOCK | O_NDELAY | O_DIRECT | O_NOATIME)
100 
101--- a/include/linux/miscdevice.h
102+++ b/include/linux/miscdevice.h
103@@ -19,6 +19,7 @@
104 #define APOLLO_MOUSE_MINOR 7
105 #define PC110PAD_MINOR 9
106 /*#define ADB_MOUSE_MINOR 10 FIXME OBSOLETE */
107+#define CRYPTODEV_MINOR 70 /* /dev/crypto */
108 #define WATCHDOG_MINOR 130 /* Watchdog timer */
109 #define TEMP_MINOR 131 /* Temperature Sensor */
110 #define RTC_MINOR 135
111--- a/include/linux/random.h
112+++ b/include/linux/random.h
113@@ -34,6 +34,30 @@
114 /* Clear the entropy pool and associated counters. (Superuser only.) */
115 #define RNDCLEARPOOL _IO( 'R', 0x06 )
116 
117+#ifdef CONFIG_FIPS_RNG
118+
119+/* Size of seed value - equal to AES blocksize */
120+#define AES_BLOCK_SIZE_BYTES 16
121+#define SEED_SIZE_BYTES AES_BLOCK_SIZE_BYTES
122+/* Size of AES key */
123+#define KEY_SIZE_BYTES 16
124+
125+/* ioctl() structure used by FIPS 140-2 Tests */
126+struct rand_fips_test {
127+ unsigned char key[KEY_SIZE_BYTES]; /* Input */
128+ unsigned char datetime[SEED_SIZE_BYTES]; /* Input */
129+ unsigned char seed[SEED_SIZE_BYTES]; /* Input */
130+ unsigned char result[SEED_SIZE_BYTES]; /* Output */
131+};
132+
133+/* FIPS 140-2 RNG Variable Seed Test. (Superuser only.) */
134+#define RNDFIPSVST _IOWR('R', 0x10, struct rand_fips_test)
135+
136+/* FIPS 140-2 RNG Monte Carlo Test. (Superuser only.) */
137+#define RNDFIPSMCT _IOWR('R', 0x11, struct rand_fips_test)
138+
139+#endif /* #ifdef CONFIG_FIPS_RNG */
140+
141 struct rand_pool_info {
142     int entropy_count;
143     int buf_size;
144@@ -53,6 +77,10 @@ extern void add_input_randomness(unsigne
145                  unsigned int value);
146 extern void add_interrupt_randomness(int irq, int irq_flags);
147 
148+extern void random_input_words(__u32 *buf, size_t wordcount, int ent_count);
149+extern int random_input_wait(void);
150+#define HAS_RANDOM_INPUT_WAIT 1
151+
152 extern void get_random_bytes(void *buf, int nbytes);
153 extern void get_random_bytes_arch(void *buf, int nbytes);
154 void generate_random_uuid(unsigned char uuid_out[16]);
155--- a/kernel/pid.c
156+++ b/kernel/pid.c
157@@ -430,6 +430,7 @@ struct task_struct *find_task_by_vpid(pi
158 {
159     return find_task_by_pid_ns(vnr, current->nsproxy->pid_ns);
160 }
161+EXPORT_SYMBOL(find_task_by_vpid);
162 
163 struct pid *get_task_pid(struct task_struct *task, enum pid_type type)
164 {
165

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