Add crc32c checksum
authorJens Axboe <jens.axboe@oracle.com>
Wed, 11 Jun 2008 18:46:19 +0000 (20:46 +0200)
committerJens Axboe <jens.axboe@oracle.com>
Wed, 11 Jun 2008 18:46:19 +0000 (20:46 +0200)
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
HOWTO
Makefile
README
crc/crc32c.c [new file with mode: 0644]
crc/crc32c.h [new file with mode: 0644]
fio.h
options.c
verify.c

diff --git a/HOWTO b/HOWTO
index 503cd0f..f569f56 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -661,6 +661,9 @@ verify=str  If writing to a file, fio can verify the file contents
                                area and store it in the header of each
                                block.
 
+                       crc32c  Use a crc32c sum of the data area and store
+                               it in the header of each block.
+
                        crc32   Use a crc32 sum of the data area and store
                                it in the header of each block.
 
index 14fcdd1..11bb17e 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -11,6 +11,7 @@ OBJS = gettime.o fio.o ioengines.o init.o stat.o log.o time.o filesetup.o \
 OBJS += crc/crc7.o
 OBJS += crc/crc16.o
 OBJS += crc/crc32.o
+OBJS += crc/crc32c.o
 OBJS += crc/crc64.o
 OBJS += crc/sha256.o
 OBJS += crc/sha512.o
diff --git a/README b/README
index 89e32c8..7555349 100644 (file)
--- a/README
+++ b/README
@@ -218,6 +218,7 @@ The job file parameters are:
        verify=x        If 'x' == md5, use md5 for verifies. If 'x' == crc32,
                        use crc32 for verifies. md5 is 'safer', but crc32 is
                        a lot faster. Only makes sense for writing to a file.
+                       For other types of checksumming, see HOWTO.
        stonewall       Wait for preceeding jobs to end before running.
        numjobs=x       Create 'x' similar entries for this job
        thread          Use pthreads instead of forked jobs
diff --git a/crc/crc32c.c b/crc/crc32c.c
new file mode 100644 (file)
index 0000000..8bbea68
--- /dev/null
@@ -0,0 +1,124 @@
+/* 
+ * CRC32C
+ *@Article{castagnoli-crc,
+ * author =       { Guy Castagnoli and Stefan Braeuer and Martin Herrman},
+ * title =        {{Optimization of Cyclic Redundancy-Check Codes with 24
+ *                 and 32 Parity Bits}},
+ * journal =      IEEE Transactions on Communication,
+ * year =         {1993},
+ * volume =       {41},
+ * number =       {6},
+ * pages =        {},
+ * month =        {June},
+ *}
+ * Used by the iSCSI driver, possibly others, and derived from the
+ * the iscsi-crc.c module of the linux-iscsi driver at
+ * http://linux-iscsi.sourceforge.net.
+ *
+ * Following the example of lib/crc32, this function is intended to be
+ * flexible and useful for all users.  Modules that currently have their
+ * own crc32c, but hopefully may be able to use this one are:
+ *  net/sctp (please add all your doco to here if you change to
+ *            use this one!)
+ *  <endoflist>
+ *
+ * Copyright (c) 2004 Cisco Systems, Inc.
+ * 
+ * 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.
+ *
+ */
+#include <inttypes.h>
+
+/*
+ * This is the CRC-32C table
+ * Generated with:
+ * width = 32 bits
+ * poly = 0x1EDC6F41
+ * reflect input bytes = true
+ * reflect output bytes = true
+ */
+
+static const uint32_t crc32c_table[256] = {
+       0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L,
+       0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL,
+       0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL,
+       0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L,
+       0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL,
+       0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L,
+       0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L,
+       0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL,
+       0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL,
+       0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L,
+       0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L,
+       0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL,
+       0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L,
+       0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL,
+       0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL,
+       0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L,
+       0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L,
+       0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L,
+       0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L,
+       0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L,
+       0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L,
+       0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L,
+       0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L,
+       0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L,
+       0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L,
+       0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L,
+       0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L,
+       0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L,
+       0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L,
+       0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L,
+       0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L,
+       0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L,
+       0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL,
+       0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L,
+       0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L,
+       0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL,
+       0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L,
+       0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL,
+       0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL,
+       0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L,
+       0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L,
+       0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL,
+       0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL,
+       0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L,
+       0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL,
+       0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L,
+       0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L,
+       0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL,
+       0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L,
+       0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL,
+       0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL,
+       0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L,
+       0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL,
+       0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L,
+       0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L,
+       0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL,
+       0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL,
+       0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L,
+       0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L,
+       0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL,
+       0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L,
+       0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL,
+       0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL,
+       0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L
+};
+
+/*
+ * Steps through buffer one byte at at time, calculates reflected 
+ * crc using table.
+ */
+
+uint32_t crc32c(unsigned char const *data, unsigned long length)
+{
+       uint32_t crc = ~0;
+
+       while (length--)
+               crc = crc32c_table[(crc ^ *data++) & 0xFFL] ^ (crc >> 8);
+
+       return crc;
+}
diff --git a/crc/crc32c.h b/crc/crc32c.h
new file mode 100644 (file)
index 0000000..1498db9
--- /dev/null
@@ -0,0 +1,23 @@
+/* crc32c -- calculate and POSIX.2 checksum 
+   Copyright (C) 92, 1995-1999 Free Software Foundation, Inc.
+
+   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, 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.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#ifndef CRC32C_H
+#define CRC32C_H
+
+extern uint32_t crc32c(unsigned char const *, unsigned long);
+
+#endif
diff --git a/fio.h b/fio.h
index ff4668e..ec8d593 100644 (file)
--- a/fio.h
+++ b/fio.h
@@ -195,6 +195,7 @@ enum {
        VERIFY_MD5,                     /* md5 sum data blocks */
        VERIFY_CRC64,                   /* crc64 sum data blocks */
        VERIFY_CRC32,                   /* crc32 sum data blocks */
+       VERIFY_CRC32C,                  /* crc32c sum data blocks */
        VERIFY_CRC16,                   /* crc16 sum data blocks */
        VERIFY_CRC7,                    /* crc7 sum data blocks */
        VERIFY_SHA256,                  /* sha256 sum data blocks */
index 07e9304..5b4e393 100644 (file)
--- a/options.c
+++ b/options.c
@@ -889,6 +889,10 @@ static struct fio_option options[] = {
                            .oval = VERIFY_CRC32,
                            .help = "Use crc32 checksums for verification",
                          },
+                         { .ival = "crc32c",
+                           .oval = VERIFY_CRC32C,
+                           .help = "Use crc32c checksums for verification",
+                         },
                          { .ival = "crc16",
                            .oval = VERIFY_CRC16,
                            .help = "Use crc16 checksums for verification",
index 680e491..afb4cb7 100644 (file)
--- a/verify.c
+++ b/verify.c
@@ -11,6 +11,7 @@
 #include "crc/md5.h"
 #include "crc/crc64.h"
 #include "crc/crc32.h"
+#include "crc/crc32c.h"
 #include "crc/crc16.h"
 #include "crc/crc7.h"
 #include "crc/sha256.h"
@@ -125,6 +126,7 @@ static inline unsigned int __hdr_size(int verify_type)
        case VERIFY_CRC64:
                len = sizeof(struct vhdr_crc64);
                break;
+       case VERIFY_CRC32C:
        case VERIFY_CRC32:
                len = sizeof(struct vhdr_crc32);
                break;
@@ -326,6 +328,27 @@ static int verify_io_u_crc32(struct verify_header *hdr, struct io_u *io_u,
        return 0;
 }
 
+static int verify_io_u_crc32c(struct verify_header *hdr, struct io_u *io_u,
+                             unsigned int header_num)
+{
+       void *p = io_u_verify_off(hdr, io_u, header_num);
+       struct vhdr_crc32 *vh = hdr_priv(hdr);
+       uint32_t c;
+
+       dprint(FD_VERIFY, "crc32c verify io_u %p, len %u\n", io_u, hdr->len);
+
+       c = crc32c(p, hdr->len - hdr_size(hdr));
+
+       if (c != vh->crc32) {
+               log_err("crc32c: verify failed at %llu/%u\n",
+                               io_u->offset + header_num * hdr->len, hdr->len);
+               log_err("crc32c: wanted %x, got %x\n", vh->crc32, c);
+               return EIO;
+       }
+
+       return 0;
+}
+
 static int verify_io_u_md5(struct verify_header *hdr, struct io_u *io_u,
                           unsigned int header_num)
 {
@@ -442,6 +465,9 @@ int verify_io_u(struct thread_data *td, struct io_u *io_u)
                case VERIFY_CRC64:
                        ret = verify_io_u_crc64(hdr, io_u, hdr_num);
                        break;
+               case VERIFY_CRC32C:
+                       ret = verify_io_u_crc32c(hdr, io_u, hdr_num);
+                       break;
                case VERIFY_CRC32:
                        ret = verify_io_u_crc32(hdr, io_u, hdr_num);
                        break;
@@ -527,6 +553,13 @@ static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len)
        vh->crc32 = crc32(p, len);
 }
 
+static void fill_crc32c(struct verify_header *hdr, void *p, unsigned int len)
+{
+       struct vhdr_crc32 *vh = hdr_priv(hdr);
+
+       vh->crc32 = crc32c(p, len);
+}
+
 static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len)
 {
        struct vhdr_crc64 *vh = hdr_priv(hdr);
@@ -584,6 +617,11 @@ void populate_verify_io_u(struct thread_data *td, struct io_u *io_u)
                                                        io_u, hdr->len);
                        fill_crc64(hdr, data, data_len);
                        break;
+               case VERIFY_CRC32C:
+                       dprint(FD_VERIFY, "fill crc32c io_u %p, len %u\n",
+                                                       io_u, hdr->len);
+                       fill_crc32c(hdr, data, data_len);
+                       break;
                case VERIFY_CRC32:
                        dprint(FD_VERIFY, "fill crc32 io_u %p, len %u\n",
                                                        io_u, hdr->len);