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Diffstat (limited to '')
| -rw-r--r-- | lib/tdb/test/run-mutex-transaction1.c | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/lib/tdb/test/run-mutex-transaction1.c b/lib/tdb/test/run-mutex-transaction1.c new file mode 100644 index 0000000..7b9f7b1 --- /dev/null +++ b/lib/tdb/test/run-mutex-transaction1.c @@ -0,0 +1,236 @@ +#include "../common/tdb_private.h" +#include "../common/io.c" +#include "../common/tdb.c" +#include "../common/lock.c" +#include "../common/freelist.c" +#include "../common/traverse.c" +#include "../common/transaction.c" +#include "../common/error.c" +#include "../common/open.c" +#include "../common/check.c" +#include "../common/hash.c" +#include "../common/mutex.c" +#include "tap-interface.h" +#include <stdlib.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <stdarg.h> + +static TDB_DATA key, data; + +static void log_fn(struct tdb_context *tdb, enum tdb_debug_level level, + const char *fmt, ...) +{ + va_list ap; + va_start(ap, fmt); + vfprintf(stderr, fmt, ap); + va_end(ap); +} + +static int do_child(int tdb_flags, int to, int from) +{ + struct tdb_context *tdb; + unsigned int log_count; + struct tdb_logging_context log_ctx = { log_fn, &log_count }; + int ret; + char c = 0; + + tdb = tdb_open_ex("mutex-transaction1.tdb", 3, tdb_flags, + O_RDWR|O_CREAT, 0755, &log_ctx, NULL); + ok(tdb, "tdb_open_ex should succeed"); + + ret = tdb_transaction_start(tdb); + ok(ret == 0, "tdb_transaction_start should succeed"); + + ret = tdb_store(tdb, key, data, TDB_INSERT); + ok(ret == 0, "tdb_store(tdb, key, data, TDB_INSERT) should succeed"); + + write(to, &c, sizeof(c)); + read(from, &c, sizeof(c)); + + ret = tdb_transaction_cancel(tdb); + ok(ret == 0, "tdb_transaction_cancel should succeed"); + + write(to, &c, sizeof(c)); + read(from, &c, sizeof(c)); + + ret = tdb_transaction_start(tdb); + ok(ret == 0, "tdb_transaction_start should succeed"); + + ret = tdb_store(tdb, key, data, TDB_INSERT); + ok(ret == 0, "tdb_store(tdb, key, data, TDB_INSERT) should succeed"); + + write(to, &c, sizeof(c)); + read(from, &c, sizeof(c)); + + ret = tdb_transaction_commit(tdb); + ok(ret == 0, "tdb_transaction_commit should succeed"); + + write(to, &c, sizeof(c)); + read(from, &c, sizeof(c)); + + ret = tdb_transaction_start(tdb); + ok(ret == 0, "tdb_transaction_start should succeed"); + + ret = tdb_store(tdb, key, key, TDB_REPLACE); + ok(ret == 0, "tdb_store(tdb, key, data, TDB_REPLACE) should succeed"); + + write(to, &c, sizeof(c)); + read(from, &c, sizeof(c)); + + ret = tdb_transaction_commit(tdb); + ok(ret == 0, "tdb_transaction_commit should succeed"); + + write(to, &c, sizeof(c)); + read(from, &c, sizeof(c)); + + return 0; +} + +/* The code should barf on TDBs created with rwlocks. */ +int main(int argc, char *argv[]) +{ + struct tdb_context *tdb; + unsigned int log_count; + struct tdb_logging_context log_ctx = { log_fn, &log_count }; + int ret, status; + pid_t child, wait_ret; + int fromchild[2]; + int tochild[2]; + TDB_DATA val; + char c; + int tdb_flags; + bool runtime_support; + + runtime_support = tdb_runtime_check_for_robust_mutexes(); + + if (!runtime_support) { + skip(1, "No robust mutex support"); + return exit_status(); + } + + key.dsize = strlen("hi"); + key.dptr = discard_const_p(uint8_t, "hi"); + data.dsize = strlen("world"); + data.dptr = discard_const_p(uint8_t, "world"); + + pipe(fromchild); + pipe(tochild); + + tdb_flags = TDB_INCOMPATIBLE_HASH| + TDB_MUTEX_LOCKING| + TDB_CLEAR_IF_FIRST; + + child = fork(); + if (child == 0) { + close(fromchild[0]); + close(tochild[1]); + return do_child(tdb_flags, fromchild[1], tochild[0]); + } + close(fromchild[1]); + close(tochild[0]); + + read(fromchild[0], &c, sizeof(c)); + + tdb = tdb_open_ex("mutex-transaction1.tdb", 0, + tdb_flags, O_RDWR|O_CREAT, 0755, + &log_ctx, NULL); + ok(tdb, "tdb_open_ex should succeed"); + + /* + * The child has the transaction running + */ + ret = tdb_transaction_start_nonblock(tdb); + ok(ret == -1, "tdb_transaction_start_nonblock not succeed"); + + ret = tdb_chainlock_nonblock(tdb, key); + ok(ret == -1, "tdb_chainlock_nonblock should not succeed"); + + /* + * We can still read + */ + ret = tdb_exists(tdb, key); + ok(ret == 0, "tdb_exists(tdb, key) should return 0"); + + val = tdb_fetch(tdb, key); + ok(val.dsize == 0, "tdb_fetch(tdb, key) should return an empty value"); + + write(tochild[1], &c, sizeof(c)); + + /* + * When the child canceled we can start... + */ + ret = tdb_transaction_start(tdb); + ok(ret == 0, "tdb_transaction_start should succeed"); + + read(fromchild[0], &c, sizeof(c)); + write(tochild[1], &c, sizeof(c)); + + ret = tdb_transaction_cancel(tdb); + ok(ret == 0, "tdb_transaction_cancel should succeed"); + + /* + * When we canceled the child can start and store... + */ + read(fromchild[0], &c, sizeof(c)); + + /* + * We still see the old values before the child commits... + */ + ret = tdb_exists(tdb, key); + ok(ret == 0, "tdb_exists(tdb, key) should return 0"); + + val = tdb_fetch(tdb, key); + ok(val.dsize == 0, "tdb_fetch(tdb, key) should return an empty value"); + + write(tochild[1], &c, sizeof(c)); + read(fromchild[0], &c, sizeof(c)); + + /* + * We see the new values after the commit... + */ + ret = tdb_exists(tdb, key); + ok(ret == 1, "tdb_exists(tdb, key) should return 1"); + + val = tdb_fetch(tdb, key); + ok(val.dsize != 0, "tdb_fetch(tdb, key) should return a value"); + ok(val.dsize == data.dsize, "tdb_fetch(tdb, key) should return a value"); + ok(memcmp(val.dptr, data.dptr, data.dsize) == 0, "tdb_fetch(tdb, key) should return a value"); + + write(tochild[1], &c, sizeof(c)); + read(fromchild[0], &c, sizeof(c)); + + /* + * The child started a new transaction and replaces the value, + * but we still see the old values before the child commits... + */ + ret = tdb_exists(tdb, key); + ok(ret == 1, "tdb_exists(tdb, key) should return 1"); + + val = tdb_fetch(tdb, key); + ok(val.dsize != 0, "tdb_fetch(tdb, key) should return a value"); + ok(val.dsize == data.dsize, "tdb_fetch(tdb, key) should return a value"); + ok(memcmp(val.dptr, data.dptr, data.dsize) == 0, "tdb_fetch(tdb, key) should return a value"); + + write(tochild[1], &c, sizeof(c)); + read(fromchild[0], &c, sizeof(c)); + + /* + * We see the new values after the commit... + */ + ret = tdb_exists(tdb, key); + ok(ret == 1, "tdb_exists(tdb, key) should return 1"); + + val = tdb_fetch(tdb, key); + ok(val.dsize != 0, "tdb_fetch(tdb, key) should return a value"); + ok(val.dsize == key.dsize, "tdb_fetch(tdb, key) should return a value"); + ok(memcmp(val.dptr, key.dptr, key.dsize) == 0, "tdb_fetch(tdb, key) should return a value"); + + write(tochild[1], &c, sizeof(c)); + + wait_ret = wait(&status); + ok(wait_ret == child, "child should have exited correctly"); + + diag("done"); + return exit_status(); +} |