648 lines
14 KiB
Diff
648 lines
14 KiB
Diff
--- a/Makefile
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+++ b/Makefile
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@@ -1,14 +1,17 @@
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KERNEL_BUILD_PATH ?= "/lib/modules/$(shell uname -r)/build"
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XVM = sub-projects/allocators/xvmalloc-kmod
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+LZO = sub-projects/compression/lzo-kmod
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EXTRA_CFLAGS := -DCONFIG_RAMZSWAP_STATS \
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-Wall
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-obj-m += ramzswap.o
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+obj-m += ramzswap.o $(LZO)/lzo1x.o
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ramzswap-objs := ramzswap_drv.o $(XVM)/xvmalloc.o
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+
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all:
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make -C $(KERNEL_BUILD_PATH) M=$(PWD) modules
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+ make -C $(KERNEL_BUILD_PATH) M=$(PWD)/$(LZO) modules
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make -C sub-projects/rzscontrol
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doc:
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@@ -16,5 +19,6 @@ doc:
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clean:
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make -C $(KERNEL_BUILD_PATH) M=$(PWD) clean
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+ make -C $(KERNEL_BUILD_PATH) M=$(PWD)/$(LZO) clean
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make -C sub-projects/rzscontrol clean
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@rm -rf *.ko
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--- a/ramzswap_drv.c
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+++ b/ramzswap_drv.c
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@@ -23,13 +23,13 @@
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#include <linux/device.h>
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#include <linux/genhd.h>
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#include <linux/highmem.h>
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-#include <linux/lzo.h>
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#include <linux/string.h>
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#include <linux/swap.h>
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#include <linux/swapops.h>
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#include <linux/vmalloc.h>
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#include <linux/version.h>
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+#include "lzo.h"
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#include "compat.h"
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#include "ramzswap_drv.h"
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--- /dev/null
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+++ b/sub-projects/compression/lzo-kmod/lzo1x.c
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@@ -0,0 +1,7 @@
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+#include <linux/module.h>
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+
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+#include "lzo1x_compress.c"
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+#include "lzo1x_decompress.c"
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+
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+MODULE_LICENSE("GPL");
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+MODULE_DESCRIPTION("LZO1X Lib");
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--- /dev/null
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+++ b/sub-projects/compression/lzo-kmod/lzo1x_compress.c
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@@ -0,0 +1,227 @@
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+/*
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+ * LZO1X Compressor from MiniLZO
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+ *
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+ * Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
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+ *
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+ * The full LZO package can be found at:
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+ * http://www.oberhumer.com/opensource/lzo/
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+ *
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+ * Changed for kernel use by:
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+ * Nitin Gupta <nitingupta910@gmail.com>
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+ * Richard Purdie <rpurdie@openedhand.com>
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/kernel.h>
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+#include <asm/unaligned.h>
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+
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+#include "lzodefs.h"
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+#include "lzo.h"
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+
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+static noinline size_t
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+_lzo1x_1_do_compress(const unsigned char *in, size_t in_len,
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+ unsigned char *out, size_t *out_len, void *wrkmem)
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+{
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+ const unsigned char * const in_end = in + in_len;
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+ const unsigned char * const ip_end = in + in_len - M2_MAX_LEN - 5;
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+ const unsigned char ** const dict = wrkmem;
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+ const unsigned char *ip = in, *ii = ip;
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+ const unsigned char *end, *m, *m_pos;
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+ size_t m_off, m_len, dindex;
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+ unsigned char *op = out;
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+
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+ ip += 4;
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+
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+ for (;;) {
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+ dindex = ((size_t)(0x21 * DX3(ip, 5, 5, 6)) >> 5) & D_MASK;
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+ m_pos = dict[dindex];
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+
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+ if (m_pos < in)
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+ goto literal;
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+
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+ if (ip == m_pos || ((size_t)(ip - m_pos) > M4_MAX_OFFSET))
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+ goto literal;
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+
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+ m_off = ip - m_pos;
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+ if (m_off <= M2_MAX_OFFSET || m_pos[3] == ip[3])
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+ goto try_match;
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+
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+ dindex = (dindex & (D_MASK & 0x7ff)) ^ (D_HIGH | 0x1f);
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+ m_pos = dict[dindex];
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+
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+ if (m_pos < in)
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+ goto literal;
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+
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+ if (ip == m_pos || ((size_t)(ip - m_pos) > M4_MAX_OFFSET))
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+ goto literal;
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+
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+ m_off = ip - m_pos;
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+ if (m_off <= M2_MAX_OFFSET || m_pos[3] == ip[3])
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+ goto try_match;
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+
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+ goto literal;
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+
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+try_match:
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+ if (get_unaligned((const unsigned short *)m_pos)
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+ == get_unaligned((const unsigned short *)ip)) {
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+ if (likely(m_pos[2] == ip[2]))
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+ goto match;
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+ }
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+
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+literal:
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+ dict[dindex] = ip;
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+ ++ip;
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+ if (unlikely(ip >= ip_end))
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+ break;
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+ continue;
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+
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+match:
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+ dict[dindex] = ip;
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+ if (ip != ii) {
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+ size_t t = ip - ii;
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+
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+ if (t <= 3) {
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+ op[-2] |= t;
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+ } else if (t <= 18) {
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+ *op++ = (t - 3);
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+ } else {
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+ size_t tt = t - 18;
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+
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+ *op++ = 0;
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+ while (tt > 255) {
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+ tt -= 255;
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+ *op++ = 0;
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+ }
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+ *op++ = tt;
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+ }
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+ do {
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+ *op++ = *ii++;
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+ } while (--t > 0);
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+ }
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+
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+ ip += 3;
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+ if (m_pos[3] != *ip++ || m_pos[4] != *ip++
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+ || m_pos[5] != *ip++ || m_pos[6] != *ip++
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+ || m_pos[7] != *ip++ || m_pos[8] != *ip++) {
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+ --ip;
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+ m_len = ip - ii;
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+
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+ if (m_off <= M2_MAX_OFFSET) {
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+ m_off -= 1;
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+ *op++ = (((m_len - 1) << 5)
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+ | ((m_off & 7) << 2));
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+ *op++ = (m_off >> 3);
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+ } else if (m_off <= M3_MAX_OFFSET) {
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+ m_off -= 1;
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+ *op++ = (M3_MARKER | (m_len - 2));
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+ goto m3_m4_offset;
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+ } else {
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+ m_off -= 0x4000;
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+
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+ *op++ = (M4_MARKER | ((m_off & 0x4000) >> 11)
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+ | (m_len - 2));
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+ goto m3_m4_offset;
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+ }
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+ } else {
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+ end = in_end;
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+ m = m_pos + M2_MAX_LEN + 1;
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+
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+ while (ip < end && *m == *ip) {
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+ m++;
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+ ip++;
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+ }
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+ m_len = ip - ii;
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+
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+ if (m_off <= M3_MAX_OFFSET) {
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+ m_off -= 1;
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+ if (m_len <= 33) {
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+ *op++ = (M3_MARKER | (m_len - 2));
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+ } else {
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+ m_len -= 33;
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+ *op++ = M3_MARKER | 0;
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+ goto m3_m4_len;
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+ }
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+ } else {
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+ m_off -= 0x4000;
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+ if (m_len <= M4_MAX_LEN) {
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+ *op++ = (M4_MARKER
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+ | ((m_off & 0x4000) >> 11)
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+ | (m_len - 2));
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+ } else {
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+ m_len -= M4_MAX_LEN;
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+ *op++ = (M4_MARKER
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+ | ((m_off & 0x4000) >> 11));
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+m3_m4_len:
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+ while (m_len > 255) {
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+ m_len -= 255;
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+ *op++ = 0;
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+ }
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+
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+ *op++ = (m_len);
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+ }
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+ }
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+m3_m4_offset:
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+ *op++ = ((m_off & 63) << 2);
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+ *op++ = (m_off >> 6);
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+ }
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+
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+ ii = ip;
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+ if (unlikely(ip >= ip_end))
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+ break;
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+ }
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+
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+ *out_len = op - out;
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+ return in_end - ii;
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+}
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+
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+int lzo1x_1_compress(const unsigned char *in, size_t in_len, unsigned char *out,
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+ size_t *out_len, void *wrkmem)
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+{
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+ const unsigned char *ii;
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+ unsigned char *op = out;
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+ size_t t;
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+
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+ if (unlikely(in_len <= M2_MAX_LEN + 5)) {
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+ t = in_len;
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+ } else {
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+ t = _lzo1x_1_do_compress(in, in_len, op, out_len, wrkmem);
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+ op += *out_len;
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+ }
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+
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+ if (t > 0) {
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+ ii = in + in_len - t;
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+
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+ if (op == out && t <= 238) {
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+ *op++ = (17 + t);
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+ } else if (t <= 3) {
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+ op[-2] |= t;
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+ } else if (t <= 18) {
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+ *op++ = (t - 3);
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+ } else {
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+ size_t tt = t - 18;
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+
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+ *op++ = 0;
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+ while (tt > 255) {
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+ tt -= 255;
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+ *op++ = 0;
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+ }
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+
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+ *op++ = tt;
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+ }
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+ do {
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+ *op++ = *ii++;
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+ } while (--t > 0);
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+ }
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+
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+ *op++ = M4_MARKER | 1;
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+ *op++ = 0;
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+ *op++ = 0;
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+
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+ *out_len = op - out;
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+ return LZO_E_OK;
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+}
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+EXPORT_SYMBOL_GPL(lzo1x_1_compress);
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+
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+MODULE_LICENSE("GPL");
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+MODULE_DESCRIPTION("LZO1X-1 Compressor");
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+
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--- /dev/null
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+++ b/sub-projects/compression/lzo-kmod/lzo1x_decompress.c
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@@ -0,0 +1,255 @@
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+/*
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+ * LZO1X Decompressor from MiniLZO
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+ *
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+ * Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
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+ *
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+ * The full LZO package can be found at:
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+ * http://www.oberhumer.com/opensource/lzo/
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+ *
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+ * Changed for kernel use by:
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+ * Nitin Gupta <nitingupta910@gmail.com>
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+ * Richard Purdie <rpurdie@openedhand.com>
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/kernel.h>
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+#include <asm/byteorder.h>
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+#include <asm/unaligned.h>
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+
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+#include "lzodefs.h"
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+#include "lzo.h"
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+
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+#define HAVE_IP(x, ip_end, ip) ((size_t)(ip_end - ip) < (x))
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+#define HAVE_OP(x, op_end, op) ((size_t)(op_end - op) < (x))
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+#define HAVE_LB(m_pos, out, op) (m_pos < out || m_pos >= op)
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+
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+#define COPY4(dst, src) \
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+ put_unaligned(get_unaligned((const u32 *)(src)), (u32 *)(dst))
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+
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+int lzo1x_decompress_safe(const unsigned char *in, size_t in_len,
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+ unsigned char *out, size_t *out_len)
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+{
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+ const unsigned char * const ip_end = in + in_len;
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+ unsigned char * const op_end = out + *out_len;
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+ const unsigned char *ip = in, *m_pos;
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+ unsigned char *op = out;
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+ size_t t;
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+
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+ *out_len = 0;
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+
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+ if (*ip > 17) {
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+ t = *ip++ - 17;
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+ if (t < 4)
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+ goto match_next;
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+ if (HAVE_OP(t, op_end, op))
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+ goto output_overrun;
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+ if (HAVE_IP(t + 1, ip_end, ip))
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+ goto input_overrun;
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+ do {
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+ *op++ = *ip++;
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+ } while (--t > 0);
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+ goto first_literal_run;
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+ }
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+
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+ while ((ip < ip_end)) {
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+ t = *ip++;
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+ if (t >= 16)
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+ goto match;
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+ if (t == 0) {
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+ if (HAVE_IP(1, ip_end, ip))
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+ goto input_overrun;
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+ while (*ip == 0) {
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+ t += 255;
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+ ip++;
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+ if (HAVE_IP(1, ip_end, ip))
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+ goto input_overrun;
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+ }
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+ t += 15 + *ip++;
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+ }
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+ if (HAVE_OP(t + 3, op_end, op))
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+ goto output_overrun;
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+ if (HAVE_IP(t + 4, ip_end, ip))
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+ goto input_overrun;
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+
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+ COPY4(op, ip);
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+ op += 4;
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+ ip += 4;
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+ if (--t > 0) {
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+ if (t >= 4) {
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+ do {
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+ COPY4(op, ip);
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+ op += 4;
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+ ip += 4;
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+ t -= 4;
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+ } while (t >= 4);
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+ if (t > 0) {
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+ do {
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+ *op++ = *ip++;
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+ } while (--t > 0);
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+ }
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+ } else {
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+ do {
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+ *op++ = *ip++;
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+ } while (--t > 0);
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+ }
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+ }
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+
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+first_literal_run:
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+ t = *ip++;
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+ if (t >= 16)
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+ goto match;
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+ m_pos = op - (1 + M2_MAX_OFFSET);
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+ m_pos -= t >> 2;
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+ m_pos -= *ip++ << 2;
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+
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+ if (HAVE_LB(m_pos, out, op))
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+ goto lookbehind_overrun;
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+
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+ if (HAVE_OP(3, op_end, op))
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+ goto output_overrun;
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+ *op++ = *m_pos++;
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+ *op++ = *m_pos++;
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+ *op++ = *m_pos;
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+
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+ goto match_done;
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+
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+ do {
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+match:
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+ if (t >= 64) {
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+ m_pos = op - 1;
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+ m_pos -= (t >> 2) & 7;
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+ m_pos -= *ip++ << 3;
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+ t = (t >> 5) - 1;
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+ if (HAVE_LB(m_pos, out, op))
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+ goto lookbehind_overrun;
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+ if (HAVE_OP(t + 3 - 1, op_end, op))
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+ goto output_overrun;
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+ goto copy_match;
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+ } else if (t >= 32) {
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+ t &= 31;
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+ if (t == 0) {
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+ if (HAVE_IP(1, ip_end, ip))
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+ goto input_overrun;
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+ while (*ip == 0) {
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+ t += 255;
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+ ip++;
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+ if (HAVE_IP(1, ip_end, ip))
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+ goto input_overrun;
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+ }
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+ t += 31 + *ip++;
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+ }
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+ m_pos = op - 1;
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+ m_pos -= le16_to_cpu(get_unaligned(
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+ (const unsigned short *)ip)) >> 2;
|
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+ ip += 2;
|
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+ } else if (t >= 16) {
|
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+ m_pos = op;
|
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+ m_pos -= (t & 8) << 11;
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+
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+ t &= 7;
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+ if (t == 0) {
|
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+ if (HAVE_IP(1, ip_end, ip))
|
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+ goto input_overrun;
|
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+ while (*ip == 0) {
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+ t += 255;
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+ ip++;
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+ if (HAVE_IP(1, ip_end, ip))
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+ goto input_overrun;
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+ }
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+ t += 7 + *ip++;
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+ }
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+ m_pos -= le16_to_cpu(get_unaligned(
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+ (const unsigned short *)ip)) >> 2;
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+ ip += 2;
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+ if (m_pos == op)
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+ goto eof_found;
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+ m_pos -= 0x4000;
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+ } else {
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+ m_pos = op - 1;
|
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+ m_pos -= t >> 2;
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+ m_pos -= *ip++ << 2;
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+
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+ if (HAVE_LB(m_pos, out, op))
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+ goto lookbehind_overrun;
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+ if (HAVE_OP(2, op_end, op))
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+ goto output_overrun;
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+
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+ *op++ = *m_pos++;
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+ *op++ = *m_pos;
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+ goto match_done;
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+ }
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+
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+ if (HAVE_LB(m_pos, out, op))
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+ goto lookbehind_overrun;
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+ if (HAVE_OP(t + 3 - 1, op_end, op))
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+ goto output_overrun;
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+
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+ if (t >= 2 * 4 - (3 - 1) && (op - m_pos) >= 4) {
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+ COPY4(op, m_pos);
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+ op += 4;
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+ m_pos += 4;
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+ t -= 4 - (3 - 1);
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+ do {
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+ COPY4(op, m_pos);
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+ op += 4;
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+ m_pos += 4;
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+ t -= 4;
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+ } while (t >= 4);
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+ if (t > 0)
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+ do {
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+ *op++ = *m_pos++;
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+ } while (--t > 0);
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+ } else {
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+copy_match:
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+ *op++ = *m_pos++;
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+ *op++ = *m_pos++;
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+ do {
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+ *op++ = *m_pos++;
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+ } while (--t > 0);
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+ }
|
|
+match_done:
|
|
+ t = ip[-2] & 3;
|
|
+ if (t == 0)
|
|
+ break;
|
|
+match_next:
|
|
+ if (HAVE_OP(t, op_end, op))
|
|
+ goto output_overrun;
|
|
+ if (HAVE_IP(t + 1, ip_end, ip))
|
|
+ goto input_overrun;
|
|
+
|
|
+ *op++ = *ip++;
|
|
+ if (t > 1) {
|
|
+ *op++ = *ip++;
|
|
+ if (t > 2)
|
|
+ *op++ = *ip++;
|
|
+ }
|
|
+
|
|
+ t = *ip++;
|
|
+ } while (ip < ip_end);
|
|
+ }
|
|
+
|
|
+ *out_len = op - out;
|
|
+ return LZO_E_EOF_NOT_FOUND;
|
|
+
|
|
+eof_found:
|
|
+ *out_len = op - out;
|
|
+ return (ip == ip_end ? LZO_E_OK :
|
|
+ (ip < ip_end ? LZO_E_INPUT_NOT_CONSUMED : LZO_E_INPUT_OVERRUN));
|
|
+input_overrun:
|
|
+ *out_len = op - out;
|
|
+ return LZO_E_INPUT_OVERRUN;
|
|
+
|
|
+output_overrun:
|
|
+ *out_len = op - out;
|
|
+ return LZO_E_OUTPUT_OVERRUN;
|
|
+
|
|
+lookbehind_overrun:
|
|
+ *out_len = op - out;
|
|
+ return LZO_E_LOOKBEHIND_OVERRUN;
|
|
+}
|
|
+
|
|
+EXPORT_SYMBOL_GPL(lzo1x_decompress_safe);
|
|
+
|
|
+MODULE_LICENSE("GPL");
|
|
+MODULE_DESCRIPTION("LZO1X Decompressor");
|
|
+
|
|
--- /dev/null
|
|
+++ b/sub-projects/compression/lzo-kmod/lzodefs.h
|
|
@@ -0,0 +1,43 @@
|
|
+/*
|
|
+ * lzodefs.h -- architecture, OS and compiler specific defines
|
|
+ *
|
|
+ * Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
|
|
+ *
|
|
+ * The full LZO package can be found at:
|
|
+ * http://www.oberhumer.com/opensource/lzo/
|
|
+ *
|
|
+ * Changed for kernel use by:
|
|
+ * Nitin Gupta <nitingupta910@gmail.com>
|
|
+ * Richard Purdie <rpurdie@openedhand.com>
|
|
+ */
|
|
+
|
|
+#define LZO_VERSION 0x2020
|
|
+#define LZO_VERSION_STRING "2.02"
|
|
+#define LZO_VERSION_DATE "Oct 17 2005"
|
|
+
|
|
+#define M1_MAX_OFFSET 0x0400
|
|
+#define M2_MAX_OFFSET 0x0800
|
|
+#define M3_MAX_OFFSET 0x4000
|
|
+#define M4_MAX_OFFSET 0xbfff
|
|
+
|
|
+#define M1_MIN_LEN 2
|
|
+#define M1_MAX_LEN 2
|
|
+#define M2_MIN_LEN 3
|
|
+#define M2_MAX_LEN 8
|
|
+#define M3_MIN_LEN 3
|
|
+#define M3_MAX_LEN 33
|
|
+#define M4_MIN_LEN 3
|
|
+#define M4_MAX_LEN 9
|
|
+
|
|
+#define M1_MARKER 0
|
|
+#define M2_MARKER 64
|
|
+#define M3_MARKER 32
|
|
+#define M4_MARKER 16
|
|
+
|
|
+#define D_BITS 14
|
|
+#define D_MASK ((1u << D_BITS) - 1)
|
|
+#define D_HIGH ((D_MASK >> 1) + 1)
|
|
+
|
|
+#define DX2(p, s1, s2) (((((size_t)((p)[2]) << (s2)) ^ (p)[1]) \
|
|
+ << (s1)) ^ (p)[0])
|
|
+#define DX3(p, s1, s2, s3) ((DX2((p)+1, s2, s3) << (s1)) ^ (p)[0])
|
|
--- /dev/null
|
|
+++ b/sub-projects/compression/lzo-kmod/lzo.h
|
|
@@ -0,0 +1,44 @@
|
|
+#ifndef __LZO_H__
|
|
+#define __LZO_H__
|
|
+/*
|
|
+ * LZO Public Kernel Interface
|
|
+ * A mini subset of the LZO real-time data compression library
|
|
+ *
|
|
+ * Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
|
|
+ *
|
|
+ * The full LZO package can be found at:
|
|
+ * http://www.oberhumer.com/opensource/lzo/
|
|
+ *
|
|
+ * Changed for kernel use by:
|
|
+ * Nitin Gupta <nitingupta910@gmail.com>
|
|
+ * Richard Purdie <rpurdie@openedhand.com>
|
|
+ */
|
|
+
|
|
+#define LZO1X_MEM_COMPRESS (16384 * sizeof(unsigned char *))
|
|
+#define LZO1X_1_MEM_COMPRESS LZO1X_MEM_COMPRESS
|
|
+
|
|
+#define lzo1x_worst_compress(x) ((x) + ((x) / 16) + 64 + 3)
|
|
+
|
|
+/* This requires 'workmem' of size LZO1X_1_MEM_COMPRESS */
|
|
+int lzo1x_1_compress(const unsigned char *src, size_t src_len,
|
|
+ unsigned char *dst, size_t *dst_len, void *wrkmem);
|
|
+
|
|
+/* safe decompression with overrun testing */
|
|
+int lzo1x_decompress_safe(const unsigned char *src, size_t src_len,
|
|
+ unsigned char *dst, size_t *dst_len);
|
|
+
|
|
+/*
|
|
+ * Return values (< 0 = Error)
|
|
+ */
|
|
+#define LZO_E_OK 0
|
|
+#define LZO_E_ERROR (-1)
|
|
+#define LZO_E_OUT_OF_MEMORY (-2)
|
|
+#define LZO_E_NOT_COMPRESSIBLE (-3)
|
|
+#define LZO_E_INPUT_OVERRUN (-4)
|
|
+#define LZO_E_OUTPUT_OVERRUN (-5)
|
|
+#define LZO_E_LOOKBEHIND_OVERRUN (-6)
|
|
+#define LZO_E_EOF_NOT_FOUND (-7)
|
|
+#define LZO_E_INPUT_NOT_CONSUMED (-8)
|
|
+#define LZO_E_NOT_YET_IMPLEMENTED (-9)
|
|
+
|
|
+#endif
|
|
--- /dev/null
|
|
+++ b/sub-projects/compression/lzo-kmod/Makefile
|
|
@@ -0,0 +1,8 @@
|
|
+obj-m += lzo1x_compress.o lzo1x_decompress.o
|
|
+
|
|
+all:
|
|
+ make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
|
|
+
|
|
+clean:
|
|
+ make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
|
|
+
|