diff options
Diffstat (limited to 'lib/tdb2/test/run-tdb1-open-during-transaction.c')
| -rw-r--r-- | lib/tdb2/test/run-tdb1-open-during-transaction.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/lib/tdb2/test/run-tdb1-open-during-transaction.c b/lib/tdb2/test/run-tdb1-open-during-transaction.c new file mode 100644 index 0000000000..7b22320a73 --- /dev/null +++ b/lib/tdb2/test/run-tdb1-open-during-transaction.c @@ -0,0 +1,176 @@ +#include "config.h" +#include "tdb1-lock-tracking.h" +#include <unistd.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_lockcheck1 +#define ftruncate ftruncate_check + +#include "tdb2-source.h" +#include <ccan/tap/tap.h> +#include <stdlib.h> +#include <stdbool.h> +#include <stdarg.h> +#include <err.h> +#include "tdb1-external-agent.h" +#include "tdb1-logging.h" + +static struct agent *agent; +static bool opened; +static int errors = 0; +static bool clear_if_first; +#define TEST_DBNAME "run-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_operation1(agent, clear_if_first ? + OPEN_WITH_CLEAR_IF_FIRST : + 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_name1(ret)); + errors++; + } + + if (ret == SUCCESS) { + ret = external_agent_operation1(agent, CLOSE, NULL); + if (ret != SUCCESS) { + diag("Agent failed to close tdb: %s", + agent_return_name1(ret)); + errors++; + } + } else if (ret != WOULD_HAVE_BLOCKED) { + diag("Agent opening file gave %s", + agent_return_name1(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[] = { TDB1_DEFAULT, + TDB1_CLEAR_IF_FIRST, + TDB1_NOMMAP, + TDB1_CLEAR_IF_FIRST | TDB1_NOMMAP }; + int i; + struct tdb1_context *tdb; + TDB1_DATA key, data; + + plan_tests(20); + agent = prepare_external_agent1(); + if (!agent) + err(1, "preparing agent"); + + unlock_callback1 = after_unlock; + for (i = 0; i < sizeof(flags)/sizeof(flags[0]); i++) { + clear_if_first = (flags[i] & TDB1_CLEAR_IF_FIRST); + diag("Test with %s and %s\n", + clear_if_first ? "CLEAR" : "DEFAULT", + (flags[i] & TDB1_NOMMAP) ? "no mmap" : "mmap"); + unlink(TEST_DBNAME); + tdb = tdb1_open_ex(TEST_DBNAME, 1024, flags[i], + O_CREAT|O_TRUNC|O_RDWR, 0600, + &taplogctx, NULL); + ok1(tdb); + + opened = true; + ok1(tdb1_transaction_start(tdb) == 0); + key.dsize = strlen("hi"); + key.dptr = (void *)"hi"; + data.dptr = (void *)"world"; + data.dsize = strlen("world"); + + ok1(tdb1_store(tdb, key, data, TDB1_INSERT) == 0); + ok1(tdb1_transaction_commit(tdb) == 0); + ok(!errors, "We had %u open errors", errors); + + opened = false; + tdb1_close(tdb); + } + + return exit_status(); +} |