Linux-libre 4.8.3-gnupck-4.8.3-gnu

1 files changed, 0 insertions, 452 deletions

diff --git a/kernel/power/tuxonice_compress.c b/kernel/power/tuxonice_compress.c
deleted file mode 100644
index 84b85226d..000000000
--- a/kernel/power/tuxonice_compress.c
+++ /dev/null
@@ -1,452 +0,0 @@
-/*
- * kernel/power/compression.c
- *
- * Copyright (C) 2003-2015 Nigel Cunningham (nigel at nigelcunningham com au)
- *
- * This file is released under the GPLv2.
- *
- * This file contains data compression routines for TuxOnIce,
- * using cryptoapi.
- */
-
-#include <linux/suspend.h>
-#include <linux/highmem.h>
-#include <linux/vmalloc.h>
-#include <linux/crypto.h>
-
-#include "tuxonice_builtin.h"
-#include "tuxonice.h"
-#include "tuxonice_modules.h"
-#include "tuxonice_sysfs.h"
-#include "tuxonice_io.h"
-#include "tuxonice_ui.h"
-#include "tuxonice_alloc.h"
-
-static int toi_expected_compression;
-
-static struct toi_module_ops toi_compression_ops;
-static struct toi_module_ops *next_driver;
-
-static char toi_compressor_name[32] = "lzo";
-
-static DEFINE_MUTEX(stats_lock);
-
-struct cpu_context {
-        u8 *page_buffer;
-        struct crypto_comp *transform;
-        unsigned int len;
-        u8 *buffer_start;
-        u8 *output_buffer;
-};
-
-#define OUT_BUF_SIZE (2 * PAGE_SIZE)
-
-static DEFINE_PER_CPU(struct cpu_context, contexts);
-
-/*
- * toi_crypto_prepare
- *
- * Prepare to do some work by allocating buffers and transforms.
- */
-static int toi_compress_crypto_prepare(void)
-{
-        int cpu;
-
-        if (!*toi_compressor_name) {
-                printk(KERN_INFO "TuxOnIce: Compression enabled but no "
-                                "compressor name set.\n");
-                return 1;
-        }
-
-        for_each_online_cpu(cpu) {
-                struct cpu_context *this = &per_cpu(contexts, cpu);
-                this->transform = crypto_alloc_comp(toi_compressor_name, 0, 0);
-                if (IS_ERR(this->transform)) {
-                        printk(KERN_INFO "TuxOnIce: Failed to initialise the "
-                                        "%s compression transform.\n",
-                                        toi_compressor_name);
-                        this->transform = NULL;
-                        return 1;
-                }
-
-                this->page_buffer =
-                        (char *) toi_get_zeroed_page(16, TOI_ATOMIC_GFP);
-
-                if (!this->page_buffer) {
-                        printk(KERN_ERR
-                          "Failed to allocate a page buffer for TuxOnIce "
-                          "compression driver.\n");
-                        return -ENOMEM;
-                }
-
-                this->output_buffer =
-                        (char *) vmalloc_32(OUT_BUF_SIZE);
-
-                if (!this->output_buffer) {
-                        printk(KERN_ERR
-                          "Failed to allocate a output buffer for TuxOnIce "
-                          "compression driver.\n");
-                        return -ENOMEM;
-                }
-        }
-
-        return 0;
-}
-
-static int toi_compress_rw_cleanup(int writing)
-{
-        int cpu;
-
-        for_each_online_cpu(cpu) {
-                struct cpu_context *this = &per_cpu(contexts, cpu);
-                if (this->transform) {
-                        crypto_free_comp(this->transform);
-                        this->transform = NULL;
-                }
-
-                if (this->page_buffer)
-                        toi_free_page(16, (unsigned long) this->page_buffer);
-
-                this->page_buffer = NULL;
-
-                if (this->output_buffer)
-                        vfree(this->output_buffer);
-
-                this->output_buffer = NULL;
-        }
-
-        return 0;
-}
-
-/*
- * toi_compress_init
- */
-
-static int toi_compress_init(int toi_or_resume)
-{
-        if (!toi_or_resume)
-                return 0;
-
-        toi_compress_bytes_in = 0;
-        toi_compress_bytes_out = 0;
-
-        next_driver = toi_get_next_filter(&toi_compression_ops);
-
-        return next_driver ? 0 : -ECHILD;
-}
-
-/*
- * toi_compress_rw_init()
- */
-
-static int toi_compress_rw_init(int rw, int stream_number)
-{
-        if (toi_compress_crypto_prepare()) {
-                printk(KERN_ERR "Failed to initialise compression "
-                                "algorithm.\n");
-                if (rw == READ) {
-                        printk(KERN_INFO "Unable to read the image.\n");
-                        return -ENODEV;
-                } else {
-                        printk(KERN_INFO "Continuing without "
-                                "compressing the image.\n");
-                        toi_compression_ops.enabled = 0;
-                }
-        }
-
-        return 0;
-}
-
-/*
- * toi_compress_write_page()
- *
- * Compress a page of data, buffering output and passing on filled
- * pages to the next module in the pipeline.
- *
- * Buffer_page:        Pointer to a buffer of size PAGE_SIZE, containing
- * data to be compressed.
- *
- * Returns:        0 on success. Otherwise the error is that returned by later
- *                 modules, -ECHILD if we have a broken pipeline or -EIO if
- *                 zlib errs.
- */
-static int toi_compress_write_page(unsigned long index, int buf_type,
-                void *buffer_page, unsigned int buf_size)
-{
-        int ret = 0, cpu = smp_processor_id();
-        struct cpu_context *ctx = &per_cpu(contexts, cpu);
-        u8* output_buffer = buffer_page;
-        int output_len = buf_size;
-        int out_buf_type = buf_type;
-
-        if (ctx->transform) {
-
-                ctx->buffer_start = TOI_MAP(buf_type, buffer_page);
-                ctx->len = OUT_BUF_SIZE;
-
-                ret = crypto_comp_compress(ctx->transform,
-                        ctx->buffer_start, buf_size,
-                        ctx->output_buffer, &ctx->len);
-
-                TOI_UNMAP(buf_type, buffer_page);
-
-                toi_message(TOI_COMPRESS, TOI_VERBOSE, 0,
-                                "CPU %d, index %lu: %d bytes",
-                                cpu, index, ctx->len);
-
-                if (!ret && ctx->len < buf_size) { /* some compression */
-                        output_buffer = ctx->output_buffer;
-                        output_len = ctx->len;
-                        out_buf_type = TOI_VIRT;
-                }
-
-        }
-
-        mutex_lock(&stats_lock);
-
-        toi_compress_bytes_in += buf_size;
-        toi_compress_bytes_out += output_len;
-
-        mutex_unlock(&stats_lock);
-
-        if (!ret)
-                ret = next_driver->write_page(index, out_buf_type,
-                                output_buffer, output_len);
-
-        return ret;
-}
-
-/*
- * toi_compress_read_page()
- * @buffer_page: struct page *. Pointer to a buffer of size PAGE_SIZE.
- *
- * Retrieve data from later modules and decompress it until the input buffer
- * is filled.
- * Zero if successful. Error condition from me or from downstream on failure.
- */
-static int toi_compress_read_page(unsigned long *index, int buf_type,
-                void *buffer_page, unsigned int *buf_size)
-{
-        int ret, cpu = smp_processor_id();
-        unsigned int len;
-        unsigned int outlen = PAGE_SIZE;
-        char *buffer_start;
-        struct cpu_context *ctx = &per_cpu(contexts, cpu);
-
-        if (!ctx->transform)
-                return next_driver->read_page(index, TOI_PAGE, buffer_page,
-                                buf_size);
-
-        /*
-         * All our reads must be synchronous - we can't decompress
-         * data that hasn't been read yet.
-         */
-
-        ret = next_driver->read_page(index, TOI_VIRT, ctx->page_buffer, &len);
-
-        buffer_start = kmap(buffer_page);
-
-        /* Error or uncompressed data */
-        if (ret || len == PAGE_SIZE) {
-                memcpy(buffer_start, ctx->page_buffer, len);
-                goto out;
-        }
-
-        ret = crypto_comp_decompress(
-                        ctx->transform,
-                        ctx->page_buffer,
-                        len, buffer_start, &outlen);
-
-        toi_message(TOI_COMPRESS, TOI_VERBOSE, 0,
-                        "CPU %d, index %lu: %d=>%d (%d).",
-                        cpu, *index, len, outlen, ret);
-
-        if (ret)
-                abort_hibernate(TOI_FAILED_IO,
-                        "Compress_read returned %d.\n", ret);
-        else if (outlen != PAGE_SIZE) {
-                abort_hibernate(TOI_FAILED_IO,
-                        "Decompression yielded %d bytes instead of %ld.\n",
-                        outlen, PAGE_SIZE);
-                printk(KERN_ERR "Decompression yielded %d bytes instead of "
-                                "%ld.\n", outlen, PAGE_SIZE);
-                ret = -EIO;
-                *buf_size = outlen;
-        }
-out:
-        TOI_UNMAP(buf_type, buffer_page);
-        return ret;
-}
-
-/*
- * toi_compress_print_debug_stats
- * @buffer: Pointer to a buffer into which the debug info will be printed.
- * @size: Size of the buffer.
- *
- * Print information to be recorded for debugging purposes into a buffer.
- * Returns: Number of characters written to the buffer.
- */
-
-static int toi_compress_print_debug_stats(char *buffer, int size)
-{
-        unsigned long pages_in = toi_compress_bytes_in >> PAGE_SHIFT,
-                      pages_out = toi_compress_bytes_out >> PAGE_SHIFT;
-        int len;
-
-        /* Output the compression ratio achieved. */
-        if (*toi_compressor_name)
-                len = scnprintf(buffer, size, "- Compressor is '%s'.\n",
-                                toi_compressor_name);
-        else
-                len = scnprintf(buffer, size, "- Compressor is not set.\n");
-
-        if (pages_in)
-                len += scnprintf(buffer+len, size - len, "  Compressed "
-                        "%lu bytes into %lu (%ld percent compression).\n",
-                  toi_compress_bytes_in,
-                  toi_compress_bytes_out,
-                  (pages_in - pages_out) * 100 / pages_in);
-        return len;
-}
-
-/*
- * toi_compress_compression_memory_needed
- *
- * Tell the caller how much memory we need to operate during hibernate/resume.
- * Returns: Unsigned long. Maximum number of bytes of memory required for
- * operation.
- */
-static int toi_compress_memory_needed(void)
-{
-        return 2 * PAGE_SIZE;
-}
-
-static int toi_compress_storage_needed(void)
-{
-        return 2 * sizeof(unsigned long) + 2 * sizeof(int) +
-                strlen(toi_compressor_name) + 1;
-}
-
-/*
- * toi_compress_save_config_info
- * @buffer: Pointer to a buffer of size PAGE_SIZE.
- *
- * Save informaton needed when reloading the image at resume time.
- * Returns: Number of bytes used for saving our data.
- */
-static int toi_compress_save_config_info(char *buffer)
-{
-        int len = strlen(toi_compressor_name) + 1, offset = 0;
-
-        *((unsigned long *) buffer) = toi_compress_bytes_in;
-        offset += sizeof(unsigned long);
-        *((unsigned long *) (buffer + offset)) = toi_compress_bytes_out;
-        offset += sizeof(unsigned long);
-        *((int *) (buffer + offset)) = toi_expected_compression;
-        offset += sizeof(int);
-        *((int *) (buffer + offset)) = len;
-        offset += sizeof(int);
-        strncpy(buffer + offset, toi_compressor_name, len);
-        return offset + len;
-}
-
-/* toi_compress_load_config_info
- * @buffer: Pointer to the start of the data.
- * @size: Number of bytes that were saved.
- *
- * Description:        Reload information needed for decompressing the image at
- * resume time.
- */
-static void toi_compress_load_config_info(char *buffer, int size)
-{
-        int len, offset = 0;
-
-        toi_compress_bytes_in = *((unsigned long *) buffer);
-        offset += sizeof(unsigned long);
-        toi_compress_bytes_out = *((unsigned long *) (buffer + offset));
-        offset += sizeof(unsigned long);
-        toi_expected_compression = *((int *) (buffer + offset));
-        offset += sizeof(int);
-        len = *((int *) (buffer + offset));
-        offset += sizeof(int);
-        strncpy(toi_compressor_name, buffer + offset, len);
-}
-
-static void toi_compress_pre_atomic_restore(struct toi_boot_kernel_data *bkd)
-{
-        bkd->compress_bytes_in = toi_compress_bytes_in;
-        bkd->compress_bytes_out = toi_compress_bytes_out;
-}
-
-static void toi_compress_post_atomic_restore(struct toi_boot_kernel_data *bkd)
-{
-        toi_compress_bytes_in = bkd->compress_bytes_in;
-        toi_compress_bytes_out = bkd->compress_bytes_out;
-}
-
-/*
- * toi_expected_compression_ratio
- *
- * Description:        Returns the expected ratio between data passed into this module
- *                 and the amount of data output when writing.
- * Returns:        100 if the module is disabled. Otherwise the value set by the
- *                 user via our sysfs entry.
- */
-
-static int toi_compress_expected_ratio(void)
-{
-        if (!toi_compression_ops.enabled)
-                return 100;
-        else
-                return 100 - toi_expected_compression;
-}
-
-/*
- * data for our sysfs entries.
- */
-static struct toi_sysfs_data sysfs_params[] = {
-        SYSFS_INT("expected_compression", SYSFS_RW, &toi_expected_compression,
-                        0, 99, 0, NULL),
-        SYSFS_INT("enabled", SYSFS_RW, &toi_compression_ops.enabled, 0, 1, 0,
-                        NULL),
-        SYSFS_STRING("algorithm", SYSFS_RW, toi_compressor_name, 31, 0, NULL),
-};
-
-/*
- * Ops structure.
- */
-static struct toi_module_ops toi_compression_ops = {
-        .type                        = FILTER_MODULE,
-        .name                        = "compression",
-        .directory                = "compression",
-        .module                        = THIS_MODULE,
-        .initialise                = toi_compress_init,
-        .memory_needed                 = toi_compress_memory_needed,
-        .print_debug_info        = toi_compress_print_debug_stats,
-        .save_config_info        = toi_compress_save_config_info,
-        .load_config_info        = toi_compress_load_config_info,
-        .storage_needed                = toi_compress_storage_needed,
-        .expected_compression        = toi_compress_expected_ratio,
-
-        .pre_atomic_restore        = toi_compress_pre_atomic_restore,
-        .post_atomic_restore        = toi_compress_post_atomic_restore,
-
-        .rw_init                = toi_compress_rw_init,
-        .rw_cleanup                = toi_compress_rw_cleanup,
-
-        .write_page                = toi_compress_write_page,
-        .read_page                = toi_compress_read_page,
-
-        .sysfs_data                = sysfs_params,
-        .num_sysfs_entries        = sizeof(sysfs_params) /
-                sizeof(struct toi_sysfs_data),
-};
-
-/* ---- Registration ---- */
-
-static __init int toi_compress_load(void)
-{
-        return toi_register_module(&toi_compression_ops);
-}
-
-late_initcall(toi_compress_load);