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#include "config.h"
#include <unistd.h>
#include "lock-tracking.h"
static ssize_t pwrite_check(int fd, const void *buf, size_t count, off_t offset);
static ssize_t write_check(int fd, const void *buf, size_t count);
static int ftruncate_check(int fd, off_t length);
#define pwrite pwrite_check
#define write write_check
#define fcntl fcntl_with_lockcheck
#define ftruncate ftruncate_check
#include <ccan/tdb2/tdb.c>
#include <ccan/tdb2/open.c>
#include <ccan/tdb2/free.c>
#include <ccan/tdb2/lock.c>
#include <ccan/tdb2/io.c>
#include <ccan/tdb2/hash.c>
#include <ccan/tdb2/check.c>
#include <ccan/tdb2/transaction.c>
#include <ccan/tap/tap.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdarg.h>
#include <err.h>
#include "external-agent.h"
#include "logging.h"
static struct agent *agent;
static bool opened;
static int errors = 0;
#define TEST_DBNAME "run-56-open-during-transaction.tdb"
#undef write
#undef pwrite
#undef fcntl
#undef ftruncate
static bool is_same(const char *snapshot, const char *latest, off_t len)
{
unsigned i;
for (i = 0; i < len; i++) {
if (snapshot[i] != latest[i])
return false;
}
return true;
}
static bool compare_file(int fd, const char *snapshot, off_t snapshot_len)
{
char *contents;
bool same;
/* over-length read serves as length check. */
contents = malloc(snapshot_len+1);
same = pread(fd, contents, snapshot_len+1, 0) == snapshot_len
&& is_same(snapshot, contents, snapshot_len);
free(contents);
return same;
}
static void check_file_intact(int fd)
{
enum agent_return ret;
struct stat st;
char *contents;
fstat(fd, &st);
contents = malloc(st.st_size);
if (pread(fd, contents, st.st_size, 0) != st.st_size) {
diag("Read fail");
errors++;
return;
}
/* Ask agent to open file. */
ret = external_agent_operation(agent, OPEN, TEST_DBNAME);
/* It's OK to open it, but it must not have changed! */
if (!compare_file(fd, contents, st.st_size)) {
diag("Agent changed file after opening %s",
agent_return_name(ret));
errors++;
}
if (ret == SUCCESS) {
ret = external_agent_operation(agent, CLOSE, NULL);
if (ret != SUCCESS) {
diag("Agent failed to close tdb: %s",
agent_return_name(ret));
errors++;
}
} else if (ret != WOULD_HAVE_BLOCKED) {
diag("Agent opening file gave %s",
agent_return_name(ret));
errors++;
}
free(contents);
}
static void after_unlock(int fd)
{
if (opened)
check_file_intact(fd);
}
static ssize_t pwrite_check(int fd,
const void *buf, size_t count, off_t offset)
{
if (opened)
check_file_intact(fd);
return pwrite(fd, buf, count, offset);
}
static ssize_t write_check(int fd, const void *buf, size_t count)
{
if (opened)
check_file_intact(fd);
return write(fd, buf, count);
}
static int ftruncate_check(int fd, off_t length)
{
if (opened)
check_file_intact(fd);
return ftruncate(fd, length);
}
int main(int argc, char *argv[])
{
const int flags[] = { TDB_DEFAULT,
TDB_NOMMAP,
TDB_CONVERT,
TDB_CONVERT | TDB_NOMMAP };
int i;
struct tdb_context *tdb;
TDB_DATA key, data;
plan_tests(20);
agent = prepare_external_agent();
if (!agent)
err(1, "preparing agent");
unlock_callback = after_unlock;
for (i = 0; i < sizeof(flags)/sizeof(flags[0]); i++) {
diag("Test with %s and %s\n",
(flags[i] & TDB_CONVERT) ? "CONVERT" : "DEFAULT",
(flags[i] & TDB_NOMMAP) ? "no mmap" : "mmap");
unlink(TEST_DBNAME);
tdb = tdb_open(TEST_DBNAME, flags[i],
O_RDWR|O_CREAT|O_TRUNC, 0600, &tap_log_attr);
ok1(tdb);
opened = true;
ok1(tdb_transaction_start(tdb) == 0);
key = tdb_mkdata("hi", strlen("hi"));
data = tdb_mkdata("world", strlen("world"));
ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
ok1(tdb_transaction_commit(tdb) == 0);
ok(!errors, "We had %u open errors", errors);
opened = false;
tdb_close(tdb);
}
return exit_status();
}
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