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content-simfile.c
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content-simfile.c
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#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <asm/types.h>
#include <assert.h>
#include <string.h>
#include <time.h>
#include "pdd_config.h"
#include "debug.h"
#include "content-gen.h"
#include "content-simfile.h"
#include "utils.h"
#include "md5.h"
FILE * simdiskptr = NULL;
extern int disksimflag;
extern int preplayflag;
extern int collectformat;
void simdiskfn_init(char *type)
{
char *progname = "replay";
char simdiskfn[356];
char cmd[346];
fprintf(stdout, "In %s\n", __FUNCTION__);
assert(disksimflag);
// assert(disksimflag && (preplayflag || !collectformat));
strcpy(simdiskfn, "simdisk_");
strcat(simdiskfn, progname);
strcat(simdiskfn, "_4K_");
strcat(simdiskfn, type);
strcat(simdiskfn, ".txt");
strcpy(cmd, "touch ");
strcat(cmd, simdiskfn);
printf("cmd = %s\n", cmd);
if (system(cmd))
{
VOID_ERR("touch %s so that fopen will succeed\n", simdiskfn);
}
simdiskptr = fopen(simdiskfn, "r+"); /* Will be first written during scan
* and then read during replay of
* PROVIDED.
*/
if (simdiskptr == NULL)
printf("Simulate file open failed: %s\n", simdiskfn);
else
printf("Simulate file opened.\n");
/* Truncate the file in case it already contains something
* from previous runs.
*/
if (truncate(simdiskfn, 0))
VOID_ERR("File truncate for %s failed\n", simdiskfn);
}
void simdiskfn_exit()
{
fprintf(stdout, "In %s\n", __FUNCTION__);
if (simdiskptr != NULL)
fclose(simdiskptr);
}
int read_simdisk(__u32 simdisk_blkid, __u8 *simcontent)
{
long n;
long offset = (long)simdisk_blkid << 12;
assert(simcontent != NULL);
fseek(simdiskptr, offset, SEEK_SET);
n = fread(simcontent, 1, BLKSIZE, simdiskptr);
if (n > 0 && n == BLKSIZE)
{
#if defined(SIMREPLAY_DEBUG_SS_DONE)
if (simdisk_blkid == 1529)
{
//savemem unsigned char debugkey[HASHLEN+1];
unsigned char* debugkey = malloc(HASHLEN+1);
getHashKey(simcontent, BLKSIZE, debugkey);
debugkey[HASHLEN]='\0';
printf("%s: simdisk_blkid=%u, md5key=%s\n", __FUNCTION__,
simdisk_blkid, debugkey);
free(debugkey); //savemem
}
#endif
return 0;
}
else
{
RET_ERR("error in read_simdisk\n");
}
}
int get_simcontent(__u32 ioblk, __u8 *simcontent, int generate)
{
long n;
long offset = ioblk << 5;
unsigned char buf[MD5HASHLEN_STR-1];
#if defined(SIMREPLAY_DEBUG_SS_DONE)
fprintf(stdout, "In %s\n", __FUNCTION__);
#endif
assert(simcontent != NULL);
assert(simdiskptr != NULL);
fseek(simdiskptr, offset, SEEK_SET);
n = fread(buf, 1, MD5HASHLEN_STR-1, simdiskptr);
if (n > 0 && n == MD5HASHLEN_STR-1)
{
if (generate)
generate_BLK_content(simcontent, buf, MD5HASHLEN_STR-1, BLKSIZE);
else
memcpy(simcontent, buf, MD5HASHLEN_STR-1);
#if defined(SIMREPLAY_DEBUG_SS_DONE)
fprintf(stdout, "buf=%s\n", buf);
fprintf(stdout, "simcontent=%s\n", simcontent);
#endif
return 0;
}
else
{
RET_ERR("failure to read ioblk %u of simulated disk file in %s\n",
ioblk, __FUNCTION__);
}
}
int write_simdisk(__u32 simdisk_blkid, __u8 *buf)
{
long n;
long offset = (long)simdisk_blkid << 12;
assert(buf != NULL);
#if defined(SIMREPLAY_DEBUG_SS_DONE)
if (simdisk_blkid == 1529)
{
//savemem unsigned char debugkey[HASHLEN+1];
unsigned char* debugkey = malloc(HASHLEN+1);
getHashKey(buf, BLKSIZE, debugkey);
debugkey[HASHLEN]='\0';
printf("%s: simdisk_blkid=%u, md5key=%s\n", __FUNCTION__,
simdisk_blkid, debugkey);
free(debugkey); //savemem
}
#endif
fseek(simdiskptr, offset, SEEK_SET);
n = fwrite(buf, 1, BLKSIZE, simdiskptr);
if (n > 0 && n == BLKSIZE)
{
return 0;
}
else
{
RET_ERR("failure to write in write_simdisk\n");
}
}
int append_simcontent(__u32 ioblk, __u8 *buf)
{
long n;
long offset = ioblk << 5;
#if defined(SIMREPLAY_DEBUG_SS_DONE)
char tempbuf[MD5HASHLEN_STR];
memcpy(tempbuf, buf, MD5HASHLEN_STR-1);
tempbuf[MD5HASHLEN_STR-1] = '\0';
assert(buf != NULL);
fprintf(stdout, "%s:At ioblk=%u, buf=%s\n", __FUNCTION__, ioblk,
tempbuf);
#endif
fseek(simdiskptr, offset, SEEK_SET);
n = fwrite(buf, 1, MD5HASHLEN_STR-1, simdiskptr);
if (n > 0 && n == MD5HASHLEN_STR-1)
{
return 0;
}
else
{
RET_ERR("failure to write to simulated disk file in "
"append_simcontent\n");
}
}