Add configurable module to perform self-tests on any crypto compression
driver.
This allows testing any crypto compression driver with any input buffer,
at varying alignments and lengths. It calculates the average bytes per
second compression and decompression rates. Any errors reported by the
compressor during compression or decompression will end the test and
be logged.
Signed-off-by: Dan Streetman ddstr...@ieee.org
---
crypto/Kconfig | 9 +
crypto/Makefile| 1 +
crypto/comp_selftest.c | 928 +
3 files changed, 938 insertions(+)
create mode 100644 crypto/comp_selftest.c
diff --git a/crypto/Kconfig b/crypto/Kconfig
index a7148ff..e56ecf2 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -189,6 +189,15 @@ config CRYPTO_TEST
help
Quick dirty crypto test module.
+config CRYPTO_COMP_SELFTEST
+ tristate Compression Self-Testing module
+ help
+ Configurable Compression Self-Testing using debugfs interface.
+ This allows you to compress and decompress buffers of variable
+ offsets, lengths, and data, using different compressors. Also
+ the average bytes per second rate for compression/decompression
+ can be calculated.
+
config CRYPTO_ABLK_HELPER
tristate
select CRYPTO_CRYPTD
diff --git a/crypto/Makefile b/crypto/Makefile
index ba19465..0bb1ac2 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -95,6 +95,7 @@ obj-$(CONFIG_CRYPTO_RNG2) += krng.o
obj-$(CONFIG_CRYPTO_ANSI_CPRNG) += ansi_cprng.o
obj-$(CONFIG_CRYPTO_DRBG) += drbg.o
obj-$(CONFIG_CRYPTO_TEST) += tcrypt.o
+obj-$(CONFIG_CRYPTO_COMP_SELFTEST) += comp_selftest.o
obj-$(CONFIG_CRYPTO_GHASH) += ghash-generic.o
obj-$(CONFIG_CRYPTO_USER_API) += af_alg.o
obj-$(CONFIG_CRYPTO_USER_API_HASH) += algif_hash.o
diff --git a/crypto/comp_selftest.c b/crypto/comp_selftest.c
new file mode 100644
index 000..691a8ea
--- /dev/null
+++ b/crypto/comp_selftest.c
@@ -0,0 +1,928 @@
+/*
+ * Self-test for compression
+ *
+ * Copyright (C) 2015 Dan Streetman, IBM Corp
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include linux/module.h
+#include linux/kthread.h
+#include linux/debugfs.h
+#include linux/uaccess.h
+#include linux/crypto.h
+#include linux/rwsem.h
+#include linux/ratelimit.h
+
+#define MODULE_NAME comp_selftest
+MODULE_LICENSE(GPL);
+MODULE_AUTHOR(Dan Streetman ddstr...@ieee.org);
+MODULE_DESCRIPTION(Crypto Compression Self-Test);
+
+static unsigned int test_kthreads_max = 64;
+module_param_named(threads_max, test_kthreads_max, uint, 0444);
+
+static unsigned int test_buffer_order = 2;
+module_param_named(buffer_order, test_buffer_order, uint, 0444);
+
+#define TEST_KTHREADS_DEFAULT (4)
+
+#define TEST_REPEAT_DEFAULT(1)
+
+#define TEST_BPS_WINDOW_DEFAULT(1)
+
+#define TEST_BUFFER_SIZE (PAGE_SIZE test_buffer_order)
+
+#define TEST_CHECK_INTERVAL(msecs_to_jiffies(500))
+
+#define OFFSET_START_DEFAULT (0)
+#define OFFSET_END_DEFAULT OFFSET_START_DEFAULT
+#define OFFSET_INTERVAL_DEFAULT(1)
+#define LENGTH_START_DEFAULT (PAGE_SIZE)
+#define LENGTH_END_DEFAULT LENGTH_START_DEFAULT
+#define LENGTH_INTERVAL_DEFAULT(1)
+
+struct test_range {
+ u32 start, interval, end;
+};
+
+struct test_param {
+ u32 running;
+ u32 repeat;
+ u32 kthreads;
+ u32 bps_window; /* in seconds */
+ struct test_range offset[3];
+ struct test_range length[3];
+};
+
+struct test_kthread_param {
+ bool running;
+ struct task_struct *kthread;
+ struct crypto_comp *tfm;
+ u8 *buffer[3];
+ u32 offset[3];
+ u32 length[3];
+ atomic64_t bps[2];
+};
+
+static struct test_kthread_param *test_kthread_params;
+
+static struct task_struct *test_kthread;
+static int test_return;
+static u8 *test_buffer;
+
+static atomic64_t test_max_bps[2];
+
+#define TEST_TFM_NAME_MAX (32)
+static char test_tfm[TEST_TFM_NAME_MAX];
+
+static struct test_param test_params, test_new_params;
+
+static DECLARE_RWSEM(test_lock);
+
+
+static unsigned long total_bps(int i)
+{
+ unsigned long total = 0;
+ int j;
+
+ for (j = 0; j test_kthreads_max; j++)
+ total += atomic64_read(test_kthread_params[j].bps[i]);
+
+ return total;
+}
+
+static void update_max_bps(int i)
+{
+ uint64_t prev, t;
+
+ t = total_bps(i);
+ prev = atomic64_read(test_max_bps[i]);
+ while (t prev) {
+ uint64_t a
