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git/t/unit-tests/u-reftable-block.c

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/*
Copyright 2020 Google LLC
Use of this source code is governed by a BSD-style
license that can be found in the LICENSE file or at
https://developers.google.com/open-source/licenses/bsd
*/
#include "unit-test.h"
#include "lib-reftable.h"
#include "reftable/block.h"
#include "reftable/blocksource.h"
#include "reftable/constants.h"
#include "reftable/reftable-error.h"
#include "strbuf.h"
static int cl_reftable_write_block(struct reftable_buf *buf,
uint8_t block_type,
struct reftable_record *recs,
size_t nrecs)
{
struct block_writer writer = {
.last_key = REFTABLE_BUF_INIT,
};
uint8_t block[1024];
int block_end;
cl_must_pass(block_writer_init(&writer, block_type, block, 1024,
0, hash_size(REFTABLE_HASH_SHA1)));
for (size_t i = 0; i < nrecs; i++)
cl_must_pass(block_writer_add(&writer, &recs[i]));
block_end = block_writer_finish(&writer);
cl_assert(block_end > 0);
cl_must_pass(reftable_buf_add(buf, block, block_end));
block_writer_release(&writer);
return block_end;
}
void test_reftable_block__read_write(void)
{
const int header_off = 21; /* random */
struct reftable_record recs[30];
const size_t N = ARRAY_SIZE(recs);
const size_t block_size = 1024;
struct reftable_block_source source = { 0 };
struct block_writer bw = {
.last_key = REFTABLE_BUF_INIT,
};
struct reftable_record rec = {
.type = REFTABLE_BLOCK_TYPE_REF,
};
size_t i = 0;
int ret;
struct reftable_block block = { 0 };
struct block_iter it = BLOCK_ITER_INIT;
struct reftable_buf want = REFTABLE_BUF_INIT;
struct reftable_buf block_data = REFTABLE_BUF_INIT;
REFTABLE_CALLOC_ARRAY(block_data.buf, block_size);
cl_assert(block_data.buf != NULL);
block_data.len = block_size;
ret = block_writer_init(&bw, REFTABLE_BLOCK_TYPE_REF,
(uint8_t *) block_data.buf, block_size,
header_off, hash_size(REFTABLE_HASH_SHA1));
cl_assert(!ret);
rec.u.ref.refname = (char *) "";
rec.u.ref.value_type = REFTABLE_REF_DELETION;
ret = block_writer_add(&bw, &rec);
cl_assert_equal_i(ret, REFTABLE_API_ERROR);
for (i = 0; i < N; i++) {
rec.u.ref.refname = xstrfmt("branch%02"PRIuMAX, (uintmax_t)i);
rec.u.ref.value_type = REFTABLE_REF_VAL1;
memset(rec.u.ref.value.val1, i, REFTABLE_HASH_SIZE_SHA1);
recs[i] = rec;
ret = block_writer_add(&bw, &rec);
rec.u.ref.refname = NULL;
rec.u.ref.value_type = REFTABLE_REF_DELETION;
cl_assert_equal_i(ret, 0);
}
ret = block_writer_finish(&bw);
cl_assert(ret > 0);
block_writer_release(&bw);
block_source_from_buf(&source ,&block_data);
reftable_block_init(&block, &source, 0, header_off, block_size,
REFTABLE_HASH_SIZE_SHA1, REFTABLE_BLOCK_TYPE_REF);
block_iter_init(&it, &block);
for (i = 0; ; i++) {
ret = block_iter_next(&it, &rec);
cl_assert(ret >= 0);
if (ret > 0) {
cl_assert_equal_i(i, N);
break;
}
cl_assert_equal_i(reftable_record_equal(&recs[i], &rec, REFTABLE_HASH_SIZE_SHA1), 1);
}
for (i = 0; i < N; i++) {
reftable_record_key(&recs[i], &want);
ret = block_iter_seek_key(&it, &want);
cl_assert_equal_i(ret, 0);
ret = block_iter_next(&it, &rec);
cl_assert_equal_i(ret, 0);
cl_assert_equal_i(reftable_record_equal(&recs[i], &rec, REFTABLE_HASH_SIZE_SHA1), 1);
want.len--;
ret = block_iter_seek_key(&it, &want);
cl_assert_equal_i(ret, 0);
ret = block_iter_next(&it, &rec);
cl_assert_equal_i(ret, 0);
cl_assert_equal_i(reftable_record_equal(&recs[10 * (i / 10)], &rec, REFTABLE_HASH_SIZE_SHA1), 1);
}
reftable_block_release(&block);
block_iter_close(&it);
reftable_record_release(&rec);
reftable_buf_release(&want);
reftable_buf_release(&block_data);
for (i = 0; i < N; i++)
reftable_record_release(&recs[i]);
}
void test_reftable_block__log_read_write(void)
{
const int header_off = 21;
struct reftable_record recs[30];
const size_t N = ARRAY_SIZE(recs);
const size_t block_size = 2048;
struct reftable_block_source source = { 0 };
struct block_writer bw = {
.last_key = REFTABLE_BUF_INIT,
};
struct reftable_record rec = {
.type = REFTABLE_BLOCK_TYPE_LOG,
};
size_t i = 0;
int ret;
struct reftable_block block = { 0 };
struct block_iter it = BLOCK_ITER_INIT;
struct reftable_buf want = REFTABLE_BUF_INIT;
struct reftable_buf block_data = REFTABLE_BUF_INIT;
REFTABLE_CALLOC_ARRAY(block_data.buf, block_size);
cl_assert(block_data.buf != NULL);
block_data.len = block_size;
ret = block_writer_init(&bw, REFTABLE_BLOCK_TYPE_LOG, (uint8_t *) block_data.buf, block_size,
header_off, hash_size(REFTABLE_HASH_SHA1));
cl_assert(!ret);
for (i = 0; i < N; i++) {
rec.u.log.refname = xstrfmt("branch%02"PRIuMAX , (uintmax_t)i);
rec.u.log.update_index = i;
rec.u.log.value_type = REFTABLE_LOG_UPDATE;
recs[i] = rec;
ret = block_writer_add(&bw, &rec);
rec.u.log.refname = NULL;
rec.u.log.value_type = REFTABLE_LOG_DELETION;
cl_assert_equal_i(ret, 0);
}
ret = block_writer_finish(&bw);
cl_assert(ret > 0);
block_writer_release(&bw);
block_source_from_buf(&source, &block_data);
reftable_block_init(&block, &source, 0, header_off, block_size,
REFTABLE_HASH_SIZE_SHA1, REFTABLE_BLOCK_TYPE_LOG);
block_iter_init(&it, &block);
for (i = 0; ; i++) {
ret = block_iter_next(&it, &rec);
cl_assert(ret >= 0);
if (ret > 0) {
cl_assert_equal_i(i, N);
break;
}
cl_assert_equal_i(reftable_record_equal(&recs[i], &rec, REFTABLE_HASH_SIZE_SHA1), 1);
}
for (i = 0; i < N; i++) {
reftable_buf_reset(&want);
cl_assert(reftable_buf_addstr(&want, recs[i].u.log.refname) == 0);
ret = block_iter_seek_key(&it, &want);
cl_assert_equal_i(ret, 0);
ret = block_iter_next(&it, &rec);
cl_assert_equal_i(ret, 0);
cl_assert_equal_i(reftable_record_equal(&recs[i], &rec, REFTABLE_HASH_SIZE_SHA1), 1);
want.len--;
ret = block_iter_seek_key(&it, &want);
cl_assert_equal_i(ret, 0);
ret = block_iter_next(&it, &rec);
cl_assert_equal_i(ret, 0);
cl_assert_equal_i(reftable_record_equal(&recs[10 * (i / 10)], &rec, REFTABLE_HASH_SIZE_SHA1), 1);
}
reftable_block_release(&block);
block_iter_close(&it);
reftable_record_release(&rec);
reftable_buf_release(&want);
reftable_buf_release(&block_data);
for (i = 0; i < N; i++)
reftable_record_release(&recs[i]);
}
void test_reftable_block__obj_read_write(void)
{
const int header_off = 21;
struct reftable_record recs[30];
const size_t N = ARRAY_SIZE(recs);
const size_t block_size = 1024;
struct reftable_block_source source = { 0 };
struct block_writer bw = {
.last_key = REFTABLE_BUF_INIT,
};
struct reftable_record rec = {
.type = REFTABLE_BLOCK_TYPE_OBJ,
};
size_t i = 0;
int ret;
struct reftable_block block = { 0 };
struct block_iter it = BLOCK_ITER_INIT;
struct reftable_buf want = REFTABLE_BUF_INIT;
struct reftable_buf block_data = REFTABLE_BUF_INIT;
REFTABLE_CALLOC_ARRAY(block_data.buf, block_size);
cl_assert(block_data.buf != NULL);
block_data.len = block_size;
ret = block_writer_init(&bw, REFTABLE_BLOCK_TYPE_OBJ, (uint8_t *) block_data.buf, block_size,
header_off, hash_size(REFTABLE_HASH_SHA1));
cl_assert(!ret);
for (i = 0; i < N; i++) {
uint8_t bytes[] = { i, i + 1, i + 2, i + 3, i + 5 }, *allocated;
DUP_ARRAY(allocated, bytes, ARRAY_SIZE(bytes));
rec.u.obj.hash_prefix = allocated;
rec.u.obj.hash_prefix_len = 5;
recs[i] = rec;
ret = block_writer_add(&bw, &rec);
rec.u.obj.hash_prefix = NULL;
rec.u.obj.hash_prefix_len = 0;
cl_assert_equal_i(ret, 0);
}
ret = block_writer_finish(&bw);
cl_assert(ret > 0);
block_writer_release(&bw);
block_source_from_buf(&source, &block_data);
reftable_block_init(&block, &source, 0, header_off, block_size,
REFTABLE_HASH_SIZE_SHA1, REFTABLE_BLOCK_TYPE_OBJ);
block_iter_init(&it, &block);
for (i = 0; ; i++) {
ret = block_iter_next(&it, &rec);
cl_assert(ret >= 0);
if (ret > 0) {
cl_assert_equal_i(i, N);
break;
}
cl_assert_equal_i(reftable_record_equal(&recs[i], &rec, REFTABLE_HASH_SIZE_SHA1), 1);
}
for (i = 0; i < N; i++) {
reftable_record_key(&recs[i], &want);
ret = block_iter_seek_key(&it, &want);
cl_assert_equal_i(ret, 0);
ret = block_iter_next(&it, &rec);
cl_assert_equal_i(ret, 0);
cl_assert_equal_i(reftable_record_equal(&recs[i], &rec, REFTABLE_HASH_SIZE_SHA1), 1);
}
reftable_block_release(&block);
block_iter_close(&it);
reftable_record_release(&rec);
reftable_buf_release(&want);
reftable_buf_release(&block_data);
for (i = 0; i < N; i++)
reftable_record_release(&recs[i]);
}
void test_reftable_block__ref_read_write(void)
{
const int header_off = 21;
struct reftable_record recs[30];
const size_t N = ARRAY_SIZE(recs);
const size_t block_size = 1024;
struct reftable_block_source source = { 0 };
struct block_writer bw = {
.last_key = REFTABLE_BUF_INIT,
};
struct reftable_record rec = {
.type = REFTABLE_BLOCK_TYPE_INDEX,
.u.idx.last_key = REFTABLE_BUF_INIT,
};
size_t i = 0;
int ret;
struct reftable_block block = { 0 };
struct block_iter it = BLOCK_ITER_INIT;
struct reftable_buf want = REFTABLE_BUF_INIT;
struct reftable_buf block_data = REFTABLE_BUF_INIT;
REFTABLE_CALLOC_ARRAY(block_data.buf, block_size);
cl_assert(block_data.buf != NULL);
block_data.len = block_size;
ret = block_writer_init(&bw, REFTABLE_BLOCK_TYPE_INDEX, (uint8_t *) block_data.buf, block_size,
header_off, hash_size(REFTABLE_HASH_SHA1));
cl_assert(!ret);
for (i = 0; i < N; i++) {
char buf[128];
snprintf(buf, sizeof(buf), "branch%02"PRIuMAX, (uintmax_t)i);
reftable_buf_init(&recs[i].u.idx.last_key);
recs[i].type = REFTABLE_BLOCK_TYPE_INDEX;
cl_assert(!reftable_buf_addstr(&recs[i].u.idx.last_key, buf));
recs[i].u.idx.offset = i;
ret = block_writer_add(&bw, &recs[i]);
cl_assert_equal_i(ret, 0);
}
ret = block_writer_finish(&bw);
cl_assert(ret > 0);
block_writer_release(&bw);
block_source_from_buf(&source, &block_data);
reftable_block_init(&block, &source, 0, header_off, block_size,
REFTABLE_HASH_SIZE_SHA1, REFTABLE_BLOCK_TYPE_INDEX);
block_iter_init(&it, &block);
for (i = 0; ; i++) {
ret = block_iter_next(&it, &rec);
cl_assert(ret >= 0);
if (ret > 0) {
cl_assert_equal_i(i, N);
break;
}
cl_assert_equal_i(reftable_record_equal(&recs[i], &rec, REFTABLE_HASH_SIZE_SHA1), 1);
}
for (i = 0; i < N; i++) {
reftable_record_key(&recs[i], &want);
ret = block_iter_seek_key(&it, &want);
cl_assert_equal_i(ret, 0);
ret = block_iter_next(&it, &rec);
cl_assert_equal_i(ret, 0);
cl_assert_equal_i(reftable_record_equal(&recs[i], &rec, REFTABLE_HASH_SIZE_SHA1), 1);
want.len--;
ret = block_iter_seek_key(&it, &want);
cl_assert_equal_i(ret, 0);
ret = block_iter_next(&it, &rec);
cl_assert_equal_i(ret, 0);
cl_assert_equal_i(reftable_record_equal(&recs[10 * (i / 10)], &rec, REFTABLE_HASH_SIZE_SHA1), 1);
}
reftable_block_release(&block);
block_iter_close(&it);
reftable_record_release(&rec);
reftable_buf_release(&want);
reftable_buf_release(&block_data);
for (i = 0; i < N; i++)
reftable_record_release(&recs[i]);
}
void test_reftable_block__iterator(void)
{
struct reftable_block_source source = { 0 };
struct reftable_record expected_refs[20];
struct reftable_ref_record ref = { 0 };
struct reftable_iterator it = { 0 };
struct reftable_block block = { 0 };
struct reftable_buf data = REFTABLE_BUF_INIT;
int err;
for (size_t i = 0; i < ARRAY_SIZE(expected_refs); i++) {
expected_refs[i] = (struct reftable_record) {
.type = REFTABLE_BLOCK_TYPE_REF,
.u.ref = {
.value_type = REFTABLE_REF_VAL1,
.refname = xstrfmt("refs/heads/branch-%02"PRIuMAX, (uintmax_t)i),
},
};
memset(expected_refs[i].u.ref.value.val1, i, REFTABLE_HASH_SIZE_SHA1);
}
cl_reftable_write_block(&data, REFTABLE_BLOCK_TYPE_REF,
expected_refs, ARRAY_SIZE(expected_refs));
block_source_from_buf(&source, &data);
reftable_block_init(&block, &source, 0, 0, data.len,
REFTABLE_HASH_SIZE_SHA1, REFTABLE_BLOCK_TYPE_REF);
err = reftable_block_init_iterator(&block, &it);
cl_assert_equal_i(err, 0);
for (size_t i = 0; ; i++) {
err = reftable_iterator_next_ref(&it, &ref);
if (err > 0) {
cl_assert_equal_i(i, ARRAY_SIZE(expected_refs));
break;
}
cl_assert_equal_i(err, 0);
cl_assert(reftable_ref_record_equal(&ref,
&expected_refs[i].u.ref, REFTABLE_HASH_SIZE_SHA1));
}
err = reftable_iterator_seek_ref(&it, "refs/heads/does-not-exist");
cl_assert_equal_i(err, 0);
err = reftable_iterator_next_ref(&it, &ref);
cl_assert_equal_i(err, 1);
err = reftable_iterator_seek_ref(&it, "refs/heads/branch-13");
cl_assert_equal_i(err, 0);
err = reftable_iterator_next_ref(&it, &ref);
cl_assert_equal_i(err, 0);
cl_assert(reftable_ref_record_equal(&ref,
&expected_refs[13].u.ref,REFTABLE_HASH_SIZE_SHA1));
for (size_t i = 0; i < ARRAY_SIZE(expected_refs); i++)
reftable_free(expected_refs[i].u.ref.refname);
reftable_ref_record_release(&ref);
reftable_iterator_destroy(&it);
reftable_block_release(&block);
reftable_buf_release(&data);
}
void test_reftable_block__corrupt_log_block_size(void)
{
struct reftable_block_source source = { 0 };
struct reftable_record rec = {
.type = REFTABLE_BLOCK_TYPE_LOG,
.u.log = {
.refname = (char *) "refs/heads/main",
.update_index = 1,
.value_type = REFTABLE_LOG_UPDATE,
},
};
struct reftable_block block = { 0 };
struct reftable_buf data = REFTABLE_BUF_INIT;
cl_reftable_write_block(&data, REFTABLE_BLOCK_TYPE_LOG, &rec, 1);
/*
* Log blocks store their inflated size as a big-endian 24-bit integer
* right after the one-byte block type. Rewrite it to claim a size that
* is smaller than the block header.
*/
reftable_put_be24((uint8_t *) data.buf + 1, 1);
block_source_from_buf(&source, &data);
cl_assert_equal_i(reftable_block_init(&block, &source, 0, 0, data.len,
REFTABLE_HASH_SIZE_SHA1, REFTABLE_BLOCK_TYPE_LOG),
REFTABLE_FORMAT_ERROR);
reftable_block_release(&block);
reftable_buf_release(&data);
}
void test_reftable_block__corrupt_block_size(void)
{
struct reftable_block_source source = { 0 };
struct reftable_record rec = {
.type = REFTABLE_BLOCK_TYPE_REF,
.u.ref = {
.value_type = REFTABLE_REF_VAL1,
.refname = (char *) "refs/heads/main",
},
};
struct reftable_block block = { 0 };
struct reftable_buf data = REFTABLE_BUF_INIT;
uint32_t block_size;
unsigned char *p;
cl_reftable_write_block(&data, REFTABLE_BLOCK_TYPE_REF, &rec, 1);
/*
* The block size is stored as a big-endian 24-bit integer right after
* the one-byte block type at the start of the block. Corrupt it to
* claim a size that is larger than the data we actually have. Reading
* the restart count and restart table relative to such a bogus block
* size must not access out-of-bounds memory.
*/
p = (unsigned char *) data.buf + 1;
block_size = reftable_get_be24(p);
cl_assert_equal_i(block_size, 47);
reftable_put_be24(p, block_size + 1);
block_source_from_buf(&source, &data);
cl_assert_equal_i(reftable_block_init(&block, &source, 0, 0, data.len,
REFTABLE_HASH_SIZE_SHA1, REFTABLE_BLOCK_TYPE_REF),
REFTABLE_FORMAT_ERROR);
reftable_block_release(&block);
reftable_buf_release(&data);
}
void test_reftable_block__corrupt_restart_count(void)
{
struct reftable_block_source source = { 0 };
struct reftable_record rec = {
.type = REFTABLE_BLOCK_TYPE_REF,
.u.ref = {
.value_type = REFTABLE_REF_VAL1,
.refname = (char *) "refs/heads/main",
},
};
struct reftable_block block = { 0 };
struct reftable_buf data = REFTABLE_BUF_INIT;
int block_size;
block_size = cl_reftable_write_block(&data, REFTABLE_BLOCK_TYPE_REF, &rec, 1);
/*
* Corrupt the restart count to claim a bogus number of restart points.
* Note that this would only cause us to perform an out-of-bounds
* access when seeking into the block, but we want to refuse such a
* block outright.
*/
reftable_put_be16((uint8_t *) data.buf + block_size - 2, 0xffff);
block_source_from_buf(&source, &data);
cl_assert_equal_i(reftable_block_init(&block, &source, 0, 0, data.len,
REFTABLE_HASH_SIZE_SHA1, REFTABLE_BLOCK_TYPE_REF),
REFTABLE_FORMAT_ERROR);
reftable_block_release(&block);
reftable_buf_release(&data);
}
void test_reftable_block__corrupt_restart_offset(void)
{
struct reftable_block_source source = { 0 };
struct reftable_record rec = {
.type = REFTABLE_BLOCK_TYPE_REF,
.u.ref = {
.value_type = REFTABLE_REF_VAL1,
.refname = (char *) "refs/heads/main",
},
};
struct reftable_block block = { 0 };
struct block_iter it = BLOCK_ITER_INIT;
struct reftable_buf want = REFTABLE_BUF_INIT;
struct reftable_buf data = REFTABLE_BUF_INIT;
cl_reftable_write_block(&data, REFTABLE_BLOCK_TYPE_REF, &rec, 1);
block_source_from_buf(&source, &data);
cl_must_pass(reftable_block_init(&block, &source, 0, 0, data.len,
REFTABLE_HASH_SIZE_SHA1, REFTABLE_BLOCK_TYPE_REF));
/*
* Corrupt the first restart offset, stored as a big-endian 24-bit
* integer at the start of the restart table, to point past the end of
* the records section. Seeking such a block must fail gracefully.
*/
reftable_put_be24((uint8_t *) block.block_data.data + block.restart_off,
0xffffff);
block_iter_init(&it, &block);
cl_must_pass(reftable_buf_addstr(&want, "refs/heads/main"));
cl_assert_equal_i(block_iter_seek_key(&it, &want), REFTABLE_FORMAT_ERROR);
reftable_buf_release(&want);
block_iter_close(&it);
reftable_block_release(&block);
reftable_buf_release(&data);
}
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