package/compcache/patches/000-provide_lzo_kmod.patch

   1 --- a/Makefile
   2 +++ b/Makefile
   3 @@ -1,14 +1,17 @@
   4  KERNEL_BUILD_PATH ?= "/lib/modules/$(shell uname -r)/build"
   5
   6  XVM = sub-projects/allocators/xvmalloc-kmod
   7 +LZO = sub-projects/compression/lzo-kmod
   8  EXTRA_CFLAGS   :=      -DCONFIG_RAMZSWAP_STATS         \
   9                         -Wall
  10
  11 -obj-m          +=      ramzswap.o
  12 +obj-m          +=      ramzswap.o $(LZO)/lzo1x.o
  13  ramzswap-objs  :=      ramzswap_drv.o $(XVM)/xvmalloc.o
  14 +
  15
  16  all:
  17         make -C $(KERNEL_BUILD_PATH) M=$(PWD) modules
  18 +       make -C $(KERNEL_BUILD_PATH) M=$(PWD)/$(LZO) modules
  19         make -C sub-projects/rzscontrol
  20
  21  doc:
  22 @@ -16,5 +19,6 @@ doc:
  23
  24  clean:
  25         make -C $(KERNEL_BUILD_PATH) M=$(PWD) clean
  26 +       make -C $(KERNEL_BUILD_PATH) M=$(PWD)/$(LZO) clean
  27         make -C sub-projects/rzscontrol clean
  28         @rm -rf *.ko
  29 --- a/ramzswap_drv.c
  30 +++ b/ramzswap_drv.c
  31 @@ -23,13 +23,13 @@
  32  #include <linux/device.h>
  33  #include <linux/genhd.h>
  34  #include <linux/highmem.h>
  35 -#include <linux/lzo.h>
  36  #include <linux/string.h>
  37  #include <linux/swap.h>
  38  #include <linux/swapops.h>
  39  #include <linux/vmalloc.h>
  40  #include <linux/version.h>
  41
  42 +#include "lzo.h"
  43  #include "compat.h"
  44  #include "ramzswap_drv.h"
  45
  46 --- /dev/null
  47 +++ b/sub-projects/compression/lzo-kmod/lzo1x.c
  48 @@ -0,0 +1,7 @@
  49 +#include <linux/module.h>
  50 +
  51 +#include "lzo1x_compress.c"
  52 +#include "lzo1x_decompress.c"
  53 +
  54 +MODULE_LICENSE("GPL");
  55 +MODULE_DESCRIPTION("LZO1X Lib");
  56 --- /dev/null
  57 +++ b/sub-projects/compression/lzo-kmod/lzo1x_compress.c
  58 @@ -0,0 +1,227 @@
  59 +/*
  60 + *  LZO1X Compressor from MiniLZO
  61 + *
  62 + *  Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
  63 + *
  64 + *  The full LZO package can be found at:
  65 + *  http://www.oberhumer.com/opensource/lzo/
  66 + *
  67 + *  Changed for kernel use by:
  68 + *  Nitin Gupta <nitingupta910@gmail.com>
  69 + *  Richard Purdie <rpurdie@openedhand.com>
  70 + */
  71 +
  72 +#include <linux/module.h>
  73 +#include <linux/kernel.h>
  74 +#include <asm/unaligned.h>
  75 +
  76 +#include "lzodefs.h"
  77 +#include "lzo.h"
  78 +
  79 +static noinline size_t
  80 +_lzo1x_1_do_compress(const unsigned char *in, size_t in_len,
  81 +               unsigned char *out, size_t *out_len, void *wrkmem)
  82 +{
  83 +       const unsigned char * const in_end = in + in_len;
  84 +       const unsigned char * const ip_end = in + in_len - M2_MAX_LEN - 5;
  85 +       const unsigned char ** const dict = wrkmem;
  86 +       const unsigned char *ip = in, *ii = ip;
  87 +       const unsigned char *end, *m, *m_pos;
  88 +       size_t m_off, m_len, dindex;
  89 +       unsigned char *op = out;
  90 +
  91 +       ip += 4;
  92 +
  93 +       for (;;) {
  94 +               dindex = ((size_t)(0x21 * DX3(ip, 5, 5, 6)) >> 5) & D_MASK;
  95 +               m_pos = dict[dindex];
  96 +
  97 +               if (m_pos < in)
  98 +                       goto literal;
  99 +
 100 +               if (ip == m_pos || ((size_t)(ip - m_pos) > M4_MAX_OFFSET))
 101 +                       goto literal;
 102 +
 103 +               m_off = ip - m_pos;
 104 +               if (m_off <= M2_MAX_OFFSET || m_pos[3] == ip[3])
 105 +                       goto try_match;
 106 +
 107 +               dindex = (dindex & (D_MASK & 0x7ff)) ^ (D_HIGH | 0x1f);
 108 +               m_pos = dict[dindex];
 109 +
 110 +               if (m_pos < in)
 111 +                       goto literal;
 112 +
 113 +               if (ip == m_pos || ((size_t)(ip - m_pos) > M4_MAX_OFFSET))
 114 +                       goto literal;
 115 +
 116 +               m_off = ip - m_pos;
 117 +               if (m_off <= M2_MAX_OFFSET || m_pos[3] == ip[3])
 118 +                       goto try_match;
 119 +
 120 +               goto literal;
 121 +
 122 +try_match:
 123 +               if (get_unaligned((const unsigned short *)m_pos)
 124 +                               == get_unaligned((const unsigned short *)ip)) {
 125 +                       if (likely(m_pos[2] == ip[2]))
 126 +                                       goto match;
 127 +               }
 128 +
 129 +literal:
 130 +               dict[dindex] = ip;
 131 +               ++ip;
 132 +               if (unlikely(ip >= ip_end))
 133 +                       break;
 134 +               continue;
 135 +
 136 +match:
 137 +               dict[dindex] = ip;
 138 +               if (ip != ii) {
 139 +                       size_t t = ip - ii;
 140 +
 141 +                       if (t <= 3) {
 142 +                               op[-2] |= t;
 143 +                       } else if (t <= 18) {
 144 +                               *op++ = (t - 3);
 145 +                       } else {
 146 +                               size_t tt = t - 18;
 147 +
 148 +                               *op++ = 0;
 149 +                               while (tt > 255) {
 150 +                                       tt -= 255;
 151 +                                       *op++ = 0;
 152 +                               }
 153 +                               *op++ = tt;
 154 +                       }
 155 +                       do {
 156 +                               *op++ = *ii++;
 157 +                       } while (--t > 0);
 158 +               }
 159 +
 160 +               ip += 3;
 161 +               if (m_pos[3] != *ip++ || m_pos[4] != *ip++
 162 +                               || m_pos[5] != *ip++ || m_pos[6] != *ip++
 163 +                               || m_pos[7] != *ip++ || m_pos[8] != *ip++) {
 164 +                       --ip;
 165 +                       m_len = ip - ii;
 166 +
 167 +                       if (m_off <= M2_MAX_OFFSET) {
 168 +                               m_off -= 1;
 169 +                               *op++ = (((m_len - 1) << 5)
 170 +                                               | ((m_off & 7) << 2));
 171 +                               *op++ = (m_off >> 3);
 172 +                       } else if (m_off <= M3_MAX_OFFSET) {
 173 +                               m_off -= 1;
 174 +                               *op++ = (M3_MARKER | (m_len - 2));
 175 +                               goto m3_m4_offset;
 176 +                       } else {
 177 +                               m_off -= 0x4000;
 178 +
 179 +                               *op++ = (M4_MARKER | ((m_off & 0x4000) >> 11)
 180 +                                               | (m_len - 2));
 181 +                               goto m3_m4_offset;
 182 +                       }
 183 +               } else {
 184 +                       end = in_end;
 185 +                       m = m_pos + M2_MAX_LEN + 1;
 186 +
 187 +                       while (ip < end && *m == *ip) {
 188 +                               m++;
 189 +                               ip++;
 190 +                       }
 191 +                       m_len = ip - ii;
 192 +
 193 +                       if (m_off <= M3_MAX_OFFSET) {
 194 +                               m_off -= 1;
 195 +                               if (m_len <= 33) {
 196 +                                       *op++ = (M3_MARKER | (m_len - 2));
 197 +                               } else {
 198 +                                       m_len -= 33;
 199 +                                       *op++ = M3_MARKER | 0;
 200 +                                       goto m3_m4_len;
 201 +                               }
 202 +                       } else {
 203 +                               m_off -= 0x4000;
 204 +                               if (m_len <= M4_MAX_LEN) {
 205 +                                       *op++ = (M4_MARKER
 206 +                                               | ((m_off & 0x4000) >> 11)
 207 +                                               | (m_len - 2));
 208 +                               } else {
 209 +                                       m_len -= M4_MAX_LEN;
 210 +                                       *op++ = (M4_MARKER
 211 +                                               | ((m_off & 0x4000) >> 11));
 212 +m3_m4_len:
 213 +                                       while (m_len > 255) {
 214 +                                               m_len -= 255;
 215 +                                               *op++ = 0;
 216 +                                       }
 217 +
 218 +                                       *op++ = (m_len);
 219 +                               }
 220 +                       }
 221 +m3_m4_offset:
 222 +                       *op++ = ((m_off & 63) << 2);
 223 +                       *op++ = (m_off >> 6);
 224 +               }
 225 +
 226 +               ii = ip;
 227 +               if (unlikely(ip >= ip_end))
 228 +                       break;
 229 +       }
 230 +
 231 +       *out_len = op - out;
 232 +       return in_end - ii;
 233 +}
 234 +
 235 +int lzo1x_1_compress(const unsigned char *in, size_t in_len, unsigned char *out,
 236 +                       size_t *out_len, void *wrkmem)
 237 +{
 238 +       const unsigned char *ii;
 239 +       unsigned char *op = out;
 240 +       size_t t;
 241 +
 242 +       if (unlikely(in_len <= M2_MAX_LEN + 5)) {
 243 +               t = in_len;
 244 +       } else {
 245 +               t = _lzo1x_1_do_compress(in, in_len, op, out_len, wrkmem);
 246 +               op += *out_len;
 247 +       }
 248 +
 249 +       if (t > 0) {
 250 +               ii = in + in_len - t;
 251 +
 252 +               if (op == out && t <= 238) {
 253 +                       *op++ = (17 + t);
 254 +               } else if (t <= 3) {
 255 +                       op[-2] |= t;
 256 +               } else if (t <= 18) {
 257 +                       *op++ = (t - 3);
 258 +               } else {
 259 +                       size_t tt = t - 18;
 260 +
 261 +                       *op++ = 0;
 262 +                       while (tt > 255) {
 263 +                               tt -= 255;
 264 +                               *op++ = 0;
 265 +                       }
 266 +
 267 +                       *op++ = tt;
 268 +               }
 269 +               do {
 270 +                       *op++ = *ii++;
 271 +               } while (--t > 0);
 272 +       }
 273 +
 274 +       *op++ = M4_MARKER | 1;
 275 +       *op++ = 0;
 276 +       *op++ = 0;
 277 +
 278 +       *out_len = op - out;
 279 +       return LZO_E_OK;
 280 +}
 281 +EXPORT_SYMBOL_GPL(lzo1x_1_compress);
 282 +
 283 +MODULE_LICENSE("GPL");
 284 +MODULE_DESCRIPTION("LZO1X-1 Compressor");
 285 +
 286 --- /dev/null
 287 +++ b/sub-projects/compression/lzo-kmod/lzo1x_decompress.c
 288 @@ -0,0 +1,255 @@
 289 +/*
 290 + *  LZO1X Decompressor from MiniLZO
 291 + *
 292 + *  Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
 293 + *
 294 + *  The full LZO package can be found at:
 295 + *  http://www.oberhumer.com/opensource/lzo/
 296 + *
 297 + *  Changed for kernel use by:
 298 + *  Nitin Gupta <nitingupta910@gmail.com>
 299 + *  Richard Purdie <rpurdie@openedhand.com>
 300 + */
 301 +
 302 +#include <linux/module.h>
 303 +#include <linux/kernel.h>
 304 +#include <asm/byteorder.h>
 305 +#include <asm/unaligned.h>
 306 +
 307 +#include "lzodefs.h"
 308 +#include "lzo.h"
 309 +
 310 +#define HAVE_IP(x, ip_end, ip) ((size_t)(ip_end - ip) < (x))
 311 +#define HAVE_OP(x, op_end, op) ((size_t)(op_end - op) < (x))
 312 +#define HAVE_LB(m_pos, out, op) (m_pos < out || m_pos >= op)
 313 +
 314 +#define COPY4(dst, src)        \
 315 +               put_unaligned(get_unaligned((const u32 *)(src)), (u32 *)(dst))
 316 +
 317 +int lzo1x_decompress_safe(const unsigned char *in, size_t in_len,
 318 +                       unsigned char *out, size_t *out_len)
 319 +{
 320 +       const unsigned char * const ip_end = in + in_len;
 321 +       unsigned char * const op_end = out + *out_len;
 322 +       const unsigned char *ip = in, *m_pos;
 323 +       unsigned char *op = out;
 324 +       size_t t;
 325 +
 326 +       *out_len = 0;
 327 +
 328 +       if (*ip > 17) {
 329 +               t = *ip++ - 17;
 330 +               if (t < 4)
 331 +                       goto match_next;
 332 +               if (HAVE_OP(t, op_end, op))
 333 +                       goto output_overrun;
 334 +               if (HAVE_IP(t + 1, ip_end, ip))
 335 +                       goto input_overrun;
 336 +               do {
 337 +                       *op++ = *ip++;
 338 +               } while (--t > 0);
 339 +               goto first_literal_run;
 340 +       }
 341 +
 342 +       while ((ip < ip_end)) {
 343 +               t = *ip++;
 344 +               if (t >= 16)
 345 +                       goto match;
 346 +               if (t == 0) {
 347 +                       if (HAVE_IP(1, ip_end, ip))
 348 +                               goto input_overrun;
 349 +                       while (*ip == 0) {
 350 +                               t += 255;
 351 +                               ip++;
 352 +                               if (HAVE_IP(1, ip_end, ip))
 353 +                                       goto input_overrun;
 354 +                       }
 355 +                       t += 15 + *ip++;
 356 +               }
 357 +               if (HAVE_OP(t + 3, op_end, op))
 358 +                       goto output_overrun;
 359 +               if (HAVE_IP(t + 4, ip_end, ip))
 360 +                       goto input_overrun;
 361 +
 362 +               COPY4(op, ip);
 363 +               op += 4;
 364 +               ip += 4;
 365 +               if (--t > 0) {
 366 +                       if (t >= 4) {
 367 +                               do {
 368 +                                       COPY4(op, ip);
 369 +                                       op += 4;
 370 +                                       ip += 4;
 371 +                                       t -= 4;
 372 +                               } while (t >= 4);
 373 +                               if (t > 0) {
 374 +                                       do {
 375 +                                               *op++ = *ip++;
 376 +                                       } while (--t > 0);
 377 +                               }
 378 +                       } else {
 379 +                               do {
 380 +                                       *op++ = *ip++;
 381 +                               } while (--t > 0);
 382 +                       }
 383 +               }
 384 +
 385 +first_literal_run:
 386 +               t = *ip++;
 387 +               if (t >= 16)
 388 +                       goto match;
 389 +               m_pos = op - (1 + M2_MAX_OFFSET);
 390 +               m_pos -= t >> 2;
 391 +               m_pos -= *ip++ << 2;
 392 +
 393 +               if (HAVE_LB(m_pos, out, op))
 394 +                       goto lookbehind_overrun;
 395 +
 396 +               if (HAVE_OP(3, op_end, op))
 397 +                       goto output_overrun;
 398 +               *op++ = *m_pos++;
 399 +               *op++ = *m_pos++;
 400 +               *op++ = *m_pos;
 401 +
 402 +               goto match_done;
 403 +
 404 +               do {
 405 +match:
 406 +                       if (t >= 64) {
 407 +                               m_pos = op - 1;
 408 +                               m_pos -= (t >> 2) & 7;
 409 +                               m_pos -= *ip++ << 3;
 410 +                               t = (t >> 5) - 1;
 411 +                               if (HAVE_LB(m_pos, out, op))
 412 +                                       goto lookbehind_overrun;
 413 +                               if (HAVE_OP(t + 3 - 1, op_end, op))
 414 +                                       goto output_overrun;
 415 +                               goto copy_match;
 416 +                       } else if (t >= 32) {
 417 +                               t &= 31;
 418 +                               if (t == 0) {
 419 +                                       if (HAVE_IP(1, ip_end, ip))
 420 +                                               goto input_overrun;
 421 +                                       while (*ip == 0) {
 422 +                                               t += 255;
 423 +                                               ip++;
 424 +                                               if (HAVE_IP(1, ip_end, ip))
 425 +                                                       goto input_overrun;
 426 +                                       }
 427 +                                       t += 31 + *ip++;
 428 +                               }
 429 +                               m_pos = op - 1;
 430 +                               m_pos -= le16_to_cpu(get_unaligned(
 431 +                                       (const unsigned short *)ip)) >> 2;
 432 +                               ip += 2;
 433 +                       } else if (t >= 16) {
 434 +                               m_pos = op;
 435 +                               m_pos -= (t & 8) << 11;
 436 +
 437 +                               t &= 7;
 438 +                               if (t == 0) {
 439 +                                       if (HAVE_IP(1, ip_end, ip))
 440 +                                               goto input_overrun;
 441 +                                       while (*ip == 0) {
 442 +                                               t += 255;
 443 +                                               ip++;
 444 +                                               if (HAVE_IP(1, ip_end, ip))
 445 +                                                       goto input_overrun;
 446 +                                       }
 447 +                                       t += 7 + *ip++;
 448 +                               }
 449 +                               m_pos -= le16_to_cpu(get_unaligned(
 450 +                                       (const unsigned short *)ip)) >> 2;
 451 +                               ip += 2;
 452 +                               if (m_pos == op)
 453 +                                       goto eof_found;
 454 +                               m_pos -= 0x4000;
 455 +                       } else {
 456 +                               m_pos = op - 1;
 457 +                               m_pos -= t >> 2;
 458 +                               m_pos -= *ip++ << 2;
 459 +
 460 +                               if (HAVE_LB(m_pos, out, op))
 461 +                                       goto lookbehind_overrun;
 462 +                               if (HAVE_OP(2, op_end, op))
 463 +                                       goto output_overrun;
 464 +
 465 +                               *op++ = *m_pos++;
 466 +                               *op++ = *m_pos;
 467 +                               goto match_done;
 468 +                       }
 469 +
 470 +                       if (HAVE_LB(m_pos, out, op))
 471 +                               goto lookbehind_overrun;
 472 +                       if (HAVE_OP(t + 3 - 1, op_end, op))
 473 +                               goto output_overrun;
 474 +
 475 +                       if (t >= 2 * 4 - (3 - 1) && (op - m_pos) >= 4) {
 476 +                               COPY4(op, m_pos);
 477 +                               op += 4;
 478 +                               m_pos += 4;
 479 +                               t -= 4 - (3 - 1);
 480 +                               do {
 481 +                                       COPY4(op, m_pos);
 482 +                                       op += 4;
 483 +                                       m_pos += 4;
 484 +                                       t -= 4;
 485 +                               } while (t >= 4);
 486 +                               if (t > 0)
 487 +                                       do {
 488 +                                               *op++ = *m_pos++;
 489 +                                       } while (--t > 0);
 490 +                       } else {
 491 +copy_match:
 492 +                               *op++ = *m_pos++;
 493 +                               *op++ = *m_pos++;
 494 +                               do {
 495 +                                       *op++ = *m_pos++;
 496 +                               } while (--t > 0);
 497 +                       }
 498 +match_done:
 499 +                       t = ip[-2] & 3;
 500 +                       if (t == 0)
 501 +                               break;
 502 +match_next:
 503 +                       if (HAVE_OP(t, op_end, op))
 504 +                               goto output_overrun;
 505 +                       if (HAVE_IP(t + 1, ip_end, ip))
 506 +                               goto input_overrun;
 507 +
 508 +                       *op++ = *ip++;
 509 +                       if (t > 1) {
 510 +                               *op++ = *ip++;
 511 +                               if (t > 2)
 512 +                                       *op++ = *ip++;
 513 +                       }
 514 +
 515 +                       t = *ip++;
 516 +               } while (ip < ip_end);
 517 +       }
 518 +
 519 +       *out_len = op - out;
 520 +       return LZO_E_EOF_NOT_FOUND;
 521 +
 522 +eof_found:
 523 +       *out_len = op - out;
 524 +       return (ip == ip_end ? LZO_E_OK :
 525 +               (ip < ip_end ? LZO_E_INPUT_NOT_CONSUMED : LZO_E_INPUT_OVERRUN));
 526 +input_overrun:
 527 +       *out_len = op - out;
 528 +       return LZO_E_INPUT_OVERRUN;
 529 +
 530 +output_overrun:
 531 +       *out_len = op - out;
 532 +       return LZO_E_OUTPUT_OVERRUN;
 533 +
 534 +lookbehind_overrun:
 535 +       *out_len = op - out;
 536 +       return LZO_E_LOOKBEHIND_OVERRUN;
 537 +}
 538 +
 539 +EXPORT_SYMBOL_GPL(lzo1x_decompress_safe);
 540 +
 541 +MODULE_LICENSE("GPL");
 542 +MODULE_DESCRIPTION("LZO1X Decompressor");
 543 +
 544 --- /dev/null
 545 +++ b/sub-projects/compression/lzo-kmod/lzodefs.h
 546 @@ -0,0 +1,43 @@
 547 +/*
 548 + *  lzodefs.h -- architecture, OS and compiler specific defines
 549 + *
 550 + *  Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
 551 + *
 552 + *  The full LZO package can be found at:
 553 + *  http://www.oberhumer.com/opensource/lzo/
 554 + *
 555 + *  Changed for kernel use by:
 556 + *  Nitin Gupta <nitingupta910@gmail.com>
 557 + *  Richard Purdie <rpurdie@openedhand.com>
 558 + */
 559 +
 560 +#define LZO_VERSION            0x2020
 561 +#define LZO_VERSION_STRING     "2.02"
 562 +#define LZO_VERSION_DATE       "Oct 17 2005"
 563 +
 564 +#define M1_MAX_OFFSET  0x0400
 565 +#define M2_MAX_OFFSET  0x0800
 566 +#define M3_MAX_OFFSET  0x4000
 567 +#define M4_MAX_OFFSET  0xbfff
 568 +
 569 +#define M1_MIN_LEN     2
 570 +#define M1_MAX_LEN     2
 571 +#define M2_MIN_LEN     3
 572 +#define M2_MAX_LEN     8
 573 +#define M3_MIN_LEN     3
 574 +#define M3_MAX_LEN     33
 575 +#define M4_MIN_LEN     3
 576 +#define M4_MAX_LEN     9
 577 +
 578 +#define M1_MARKER      0
 579 +#define M2_MARKER      64
 580 +#define M3_MARKER      32
 581 +#define M4_MARKER      16
 582 +
 583 +#define D_BITS         14
 584 +#define D_MASK         ((1u << D_BITS) - 1)
 585 +#define D_HIGH         ((D_MASK >> 1) + 1)
 586 +
 587 +#define DX2(p, s1, s2) (((((size_t)((p)[2]) << (s2)) ^ (p)[1]) \
 588 +                                                       << (s1)) ^ (p)[0])
 589 +#define DX3(p, s1, s2, s3)     ((DX2((p)+1, s2, s3) << (s1)) ^ (p)[0])
 590 --- /dev/null
 591 +++ b/sub-projects/compression/lzo-kmod/lzo.h
 592 @@ -0,0 +1,44 @@
 593 +#ifndef __LZO_H__
 594 +#define __LZO_H__
 595 +/*
 596 + *  LZO Public Kernel Interface
 597 + *  A mini subset of the LZO real-time data compression library
 598 + *
 599 + *  Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
 600 + *
 601 + *  The full LZO package can be found at:
 602 + *  http://www.oberhumer.com/opensource/lzo/
 603 + *
 604 + *  Changed for kernel use by:
 605 + *  Nitin Gupta <nitingupta910@gmail.com>
 606 + *  Richard Purdie <rpurdie@openedhand.com>
 607 + */
 608 +
 609 +#define LZO1X_MEM_COMPRESS     (16384 * sizeof(unsigned char *))
 610 +#define LZO1X_1_MEM_COMPRESS   LZO1X_MEM_COMPRESS
 611 +
 612 +#define lzo1x_worst_compress(x) ((x) + ((x) / 16) + 64 + 3)
 613 +
 614 +/* This requires 'workmem' of size LZO1X_1_MEM_COMPRESS */
 615 +int lzo1x_1_compress(const unsigned char *src, size_t src_len,
 616 +                       unsigned char *dst, size_t *dst_len, void *wrkmem);
 617 +
 618 +/* safe decompression with overrun testing */
 619 +int lzo1x_decompress_safe(const unsigned char *src, size_t src_len,
 620 +                       unsigned char *dst, size_t *dst_len);
 621 +
 622 +/*
 623 + * Return values (< 0 = Error)
 624 + */
 625 +#define LZO_E_OK                       0
 626 +#define LZO_E_ERROR                    (-1)
 627 +#define LZO_E_OUT_OF_MEMORY            (-2)
 628 +#define LZO_E_NOT_COMPRESSIBLE         (-3)
 629 +#define LZO_E_INPUT_OVERRUN            (-4)
 630 +#define LZO_E_OUTPUT_OVERRUN           (-5)
 631 +#define LZO_E_LOOKBEHIND_OVERRUN       (-6)
 632 +#define LZO_E_EOF_NOT_FOUND            (-7)
 633 +#define LZO_E_INPUT_NOT_CONSUMED       (-8)
 634 +#define LZO_E_NOT_YET_IMPLEMENTED      (-9)
 635 +
 636 +#endif
 637 --- /dev/null
 638 +++ b/sub-projects/compression/lzo-kmod/Makefile
 639 @@ -0,0 +1,8 @@
 640 +obj-m += lzo1x_compress.o lzo1x_decompress.o
 641 +
 642 +all:
 643 +       make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
 644 +
 645 +clean:
 646 +       make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
 647 +