120 lines
3.5 KiB
Diff
120 lines
3.5 KiB
Diff
--- a/drivers/char/random.c
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+++ b/drivers/char/random.c
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@@ -901,6 +901,65 @@ void add_blkdev_randomness(int major)
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#define subRound(a, b, c, d, e, f, k, data) \
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( e += ROTL( 5, a ) + f( b, c, d ) + k + data, b = ROTL( 30, b ) )
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+/*
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+ * random_input_words - add bulk entropy to pool
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+ *
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+ * @buf: buffer to add
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+ * @wordcount: number of __u32 words to add
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+ * @ent_count: total amount of entropy (in bits) to credit
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+ *
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+ * this provides bulk input of entropy to the input pool
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+ *
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+ */
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+void random_input_words(__u32 *buf, size_t wordcount, int ent_count)
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+{
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+ if (!random_state)
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+ return;
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+ add_entropy_words(random_state, buf, wordcount);
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+
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+ credit_entropy_store(random_state, ent_count);
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+
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+ DEBUG_ENT("credited %d bits => %d\n",
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+ ent_count, random_state->entropy_count);
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+ /*
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+ * Wake up waiting processes if we have enough
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+ * entropy.
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+ */
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+ if (random_state->entropy_count >= random_read_wakeup_thresh)
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+ wake_up_interruptible(&random_read_wait);
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+}
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+EXPORT_SYMBOL(random_input_words);
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+
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+/*
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+ * random_input_wait - wait until random needs entropy
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+ *
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+ * this function sleeps until the /dev/random subsystem actually
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+ * needs more entropy, and then return the amount of entropy
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+ * that it would be nice to have added to the system.
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+ */
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+int random_input_wait(void)
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+{
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+ int count;
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+
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+ if (!random_state)
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+ return -1;
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+
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+ wait_event_interruptible(random_write_wait,
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+ random_state->entropy_count < random_write_wakeup_thresh);
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+
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+ count = random_write_wakeup_thresh - random_state->entropy_count;
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+
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+ /* likely we got woken up due to a signal */
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+ if (count <= 0) count = random_read_wakeup_thresh;
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+
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+ DEBUG_ENT("requesting %d bits from input_wait()er %d<%d\n",
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+ count,
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+ random_state->entropy_count, random_write_wakeup_thresh);
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+
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+ return count;
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+}
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+EXPORT_SYMBOL(random_input_wait);
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+
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static void SHATransform(__u32 digest[85], __u32 const data[16])
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{
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--- a/fs/Makefile
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+++ b/fs/Makefile
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@@ -10,6 +10,8 @@ O_TARGET := fs.o
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export-objs := filesystems.o open.o dcache.o buffer.o dquot.o
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mod-subdirs := nls
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+export-objs += fcntl.o
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+
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obj-y := open.o read_write.o devices.o file_table.o buffer.o \
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super.o block_dev.o char_dev.o stat.o exec.o pipe.o namei.o \
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fcntl.o ioctl.o readdir.o select.o fifo.o locks.o \
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--- a/fs/fcntl.c
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+++ b/fs/fcntl.c
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@@ -12,6 +12,7 @@
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#include <linux/slab.h>
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#include <linux/iobuf.h>
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#include <linux/ptrace.h>
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+#include <linux/module.h>
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#include <asm/poll.h>
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#include <asm/siginfo.h>
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@@ -199,6 +200,7 @@ asmlinkage long sys_dup(unsigned int fil
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ret = dupfd(file, 0);
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return ret;
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}
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+EXPORT_SYMBOL(sys_dup);
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#define SETFL_MASK (O_APPEND | O_NONBLOCK | O_NDELAY | FASYNC | O_DIRECT)
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--- a/include/linux/miscdevice.h
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+++ b/include/linux/miscdevice.h
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@@ -15,6 +15,7 @@
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#define ADB_MOUSE_MINOR 10
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#define MK712_MINOR 15 /* MK712 touch screen */
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#define SYNTH_MINOR 25
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+#define CRYPTODEV_MINOR 70 /* OpenBSD cryptographic framework */
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#define WATCHDOG_MINOR 130 /* Watchdog timer */
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#define TEMP_MINOR 131 /* Temperature Sensor */
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#define RTC_MINOR 135
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--- a/include/linux/random.h
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+++ b/include/linux/random.h
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@@ -53,6 +53,10 @@ extern void add_mouse_randomness(__u32 m
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extern void add_interrupt_randomness(int irq);
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extern void add_blkdev_randomness(int major);
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+extern void random_input_words(__u32 *buf, size_t wordcount, int ent_count);
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+extern int random_input_wait(void);
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+#define HAS_RANDOM_INPUT_WAIT 1
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+
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extern void get_random_bytes(void *buf, int nbytes);
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void generate_random_uuid(unsigned char uuid_out[16]);
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