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zdtm: improve socket-tcp-close-wait.c

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* Don't send uninitialized data
* Close descriptors more carefully
* Add comments

travis-ci: success for zdtm: improve socket-tcp-close-wait.c
Reported-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Cc: Dmitry Safonov <dsafonov@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
Reviewed-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
This commit is contained in:
Andrei Vagin
2017-01-19 22:37:00 +03:00
committed by Pavel Emelyanov
parent f2181eaed2
commit 3dd21b1bdd
1 changed files with 36 additions and 20 deletions
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56
test/zdtm/static/socket-tcp-close-wait.c
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@@ -95,7 +95,7 @@ int main(int argc, char **argv)
int fd, fd_s, ctl_fd;
pid_t extpid;
int pfd[2];
int ret, snd_size = 0, rcv_size = 0;
int ret = 0, snd_size = 0, rcv_size = 0;
#ifndef ZDTM_TCP_LAST_ACK
char buf[BUF_SIZE];
#endif
@@ -104,13 +104,13 @@ int main(int argc, char **argv)
test_init(argc, argv);
if (pipe(pfd)) {
pr_err("pipe() failed");
pr_perror("pipe() failed");
return 1;
}
extpid = fork();
if (extpid < 0) {
pr_err("fork() failed");
pr_perror("fork() failed");
return 1;
} else if (extpid == 0) {
int size = 0;
@@ -121,9 +121,10 @@ int main(int argc, char **argv)
close(pfd[1]);
if (read(pfd[0], &port, sizeof(port)) != sizeof(port)) {
pr_err("Can't read port\n");
pr_perror("Can't read port\n");
return 1;
}
close(pfd[0]);
fd = tcp_init_client(ZDTM_FAMILY, "127.0.0.1", port);
if (fd < 0)
@@ -133,23 +134,28 @@ int main(int argc, char **argv)
if (ctl_fd < 0)
return 1;
/* == The preparation stage == */
if (read(ctl_fd, &size, sizeof(size)) != sizeof(size)) {
pr_err("write");
pr_perror("read");
return 1;
}
if (shutdown(fd, SHUT_WR) == -1) {
pr_err("shutdown");
pr_perror("shutdown");
return 1;
}
if (write(ctl_fd, &size, sizeof(size)) != sizeof(size)) {
pr_err("write");
pr_perror("write");
return 1;
}
/* == End of the preparation stage == */
/* Checkpoint/restore */
/* == The final stage == */
if (read(ctl_fd, &c, 1) != 0) {
pr_err("read");
pr_perror("read");
return 1;
}
@@ -160,12 +166,18 @@ int main(int argc, char **argv)
#else
if (read(fd, buf, sizeof(buf)) != sizeof(TEST_MSG) ||
strncmp(buf, TEST_MSG, sizeof(TEST_MSG))) {
pr_err("read");
pr_perror("read");
return 1;
}
#endif
write(ctl_fd, &size, sizeof(size));
if (write(ctl_fd, &size, sizeof(size)) != sizeof(size)) {
pr_perror("write");
return 1;
}
/* == End of the final stage == */
close(ctl_fd);
close(fd);
return 0;
@@ -181,7 +193,7 @@ int main(int argc, char **argv)
close(pfd[0]);
if (write(pfd[1], &port, sizeof(port)) != sizeof(port)) {
pr_err("Can't send port");
pr_perror("Can't send port");
return 1;
}
close(pfd[1]);
@@ -191,16 +203,17 @@ int main(int argc, char **argv)
*/
fd = tcp_accept_server(fd_s);
if (fd < 0) {
pr_err("can't accept client connection %m");
pr_perror("can't accept client connection %m");
return 1;
}
ctl_fd = tcp_accept_server(fd_s);
if (ctl_fd < 0) {
pr_err("can't accept client connection %m");
pr_perror("can't accept client connection %m");
return 1;
}
/* == The preparation stage == */
#ifdef ZDTM_TCP_LAST_ACK
snd_size = fill_sock_buf(fd);
if (snd_size <= 0)
@@ -208,18 +221,19 @@ int main(int argc, char **argv)
#endif
if (write(ctl_fd, &ret, sizeof(ret)) != sizeof(ret)) {
pr_err("read");
pr_perror("read");
return 1;
}
if (read(ctl_fd, &ret, sizeof(ret)) != sizeof(ret)) {
pr_err("read");
pr_perror("read");
return 1;
}
/* == End of the preparation stage */
#ifdef ZDTM_TCP_LAST_ACK
if (shutdown(fd, SHUT_WR) == -1) {
pr_err("shutdown");
pr_perror("shutdown");
return 1;
}
#endif
@@ -227,19 +241,20 @@ int main(int argc, char **argv)
test_daemon();
test_waitsig();
/* == The final stage == */
if (shutdown(ctl_fd, SHUT_WR) == -1) {
pr_err("shutdown");
pr_perror("shutdown");
return 1;
}
#ifndef ZDTM_TCP_LAST_ACK
if (write(fd, TEST_MSG, sizeof(TEST_MSG)) != sizeof(TEST_MSG)) {
pr_err("write");
pr_perror("write");
return 1;
}
if (shutdown(fd, SHUT_WR) == -1) {
pr_err("shutdown");
pr_perror("shutdown");
return 1;
}
#endif
@@ -252,9 +267,10 @@ int main(int argc, char **argv)
}
if (read(ctl_fd, &ret, sizeof(ret)) != sizeof(ret)) {
pr_err("read");
pr_perror("read");
return 1;
}
/* == End of the final stage == */
if (ret != snd_size) {
fail("The parent sent %d bytes, but the child received %d bytes\n", snd_size, ret);