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Kent Overstreet 2010-05-23 13:08:27 -08:00
parent 71b4a29224
commit 91bc742528
1 changed files with 9 additions and 3 deletions
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12
bcache-test.c
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@ -89,6 +89,7 @@ long getblocks(int fd)
struct pagestuff { struct pagestuff {
unsigned char csum[16]; unsigned char csum[16];
unsigned char oldcsum[16];
int readcount; int readcount;
int writecount; int writecount;
}; };
@ -100,6 +101,7 @@ int main(int argc, char **argv)
unsigned long size, i, offset = 0, done = 0; unsigned long size, i, offset = 0, done = 0;
void *buf1 = NULL, *buf2 = NULL; void *buf1 = NULL, *buf2 = NULL;
struct pagestuff *pages, *p; struct pagestuff *pages, *p;
unsigned char c[16];
RC4_KEY writedata; RC4_KEY writedata;
RC4_set_key(&writedata, 16, bcache_magic); RC4_set_key(&writedata, 16, bcache_magic);
@ -181,13 +183,13 @@ int main(int argc, char **argv)
RC4(&writedata, 4096, zero, buf1 + j); RC4(&writedata, 4096, zero, buf1 + j);
if (csum) { if (csum) {
unsigned char c[16];
MD4(buf1 + j, 4096, &c[0]); MD4(buf1 + j, 4096, &c[0]);
if (writing || if (writing ||
(!p->readcount && !p->writecount)) (!p->readcount && !p->writecount)) {
memcpy(&p->oldcsum[0], &p->csum[0], 16);
memcpy(&p->csum[0], c, 16); memcpy(&p->csum[0], c, 16);
else if (memcmp(&p->csum[0], c, 16)) } else if (memcmp(&p->csum[0], c, 16))
goto bad; goto bad;
} else if (!writing && } else if (!writing &&
memcmp(buf1 + j, memcmp(buf1 + j,
@ -208,5 +210,9 @@ err:
bad: bad:
printf("Bad read! loop %li offset %li sectors %i, sector %i, readcount %i writecount %i\n", printf("Bad read! loop %li offset %li sectors %i, sector %i, readcount %i writecount %i\n",
i, offset >> 9, nbytes >> 9, j >> 9, p->readcount, p->writecount); i, offset >> 9, nbytes >> 9, j >> 9, p->readcount, p->writecount);
if (!memcmp(&p->oldcsum[0], c, 16))
printf("Matches previous csum\n");
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }