[LTP] [PATCH v2 3/3] epoll_wait/epoll_wait03.c: add new testcase
Guangwen Feng
fenggw-fnst@cn.fujitsu.com
Wed Feb 17 11:51:26 CET 2016
Verify that:
1) epoll_wait(2) fails if epfd is not a valid file descriptor
2) epoll_wait(2) fails if epfd is not an epoll file descriptor
3) epoll_wait(2) fails if maxevents is less than zero
4) epoll_wait(2) fails if maxevents is equal to zero
5) epoll_wait(2) fails if the memory area pointed to by events
is not accessible with write permissions.
Expected result:
1) epoll_wait(2) should return -1 and set errno to EBADF
2) epoll_wait(2) should return -1 and set errno to EINVAL
3) epoll_wait(2) should return -1 and set errno to EINVAL
4) epoll_wait(2) should return -1 and set errno to EINVAL
5) epoll_wait(2) should return -1 and set errno to EFAULT
Signed-off-by: Guangwen Feng <fenggw-fnst@cn.fujitsu.com>
---
runtest/ltplite | 1 +
runtest/stress.part3 | 1 +
runtest/syscalls | 1 +
testcases/kernel/syscalls/.gitignore | 1 +
.../kernel/syscalls/epoll_wait/epoll_wait03.c | 158 +++++++++++++++++++++
5 files changed, 162 insertions(+)
create mode 100644 testcases/kernel/syscalls/epoll_wait/epoll_wait03.c
diff --git a/runtest/ltplite b/runtest/ltplite
index aa4ebdc..ced593f 100644
--- a/runtest/ltplite
+++ b/runtest/ltplite
@@ -161,6 +161,7 @@ dup205 dup205
epoll_wait01 epoll_wait01
epoll_wait02 epoll_wait02
+epoll_wait03 epoll_wait03
execl01 execl01
execle01 execle01
diff --git a/runtest/stress.part3 b/runtest/stress.part3
index 7d629c5..ab2c531 100644
--- a/runtest/stress.part3
+++ b/runtest/stress.part3
@@ -102,6 +102,7 @@ dup205 dup205
epoll_wait01 epoll_wait01
epoll_wait02 epoll_wait02
+epoll_wait03 epoll_wait03
execl01 execl01
execle01 execle01
diff --git a/runtest/syscalls b/runtest/syscalls
index 23d7adc..dbef381 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -124,6 +124,7 @@ epoll_create1_01 epoll_create1_01
epoll01 epoll-ltp
epoll_wait01 epoll_wait01
epoll_wait02 epoll_wait02
+epoll_wait03 epoll_wait03
eventfd01 eventfd01
diff --git a/testcases/kernel/syscalls/.gitignore b/testcases/kernel/syscalls/.gitignore
index 85feeac..97b8fd8 100644
--- a/testcases/kernel/syscalls/.gitignore
+++ b/testcases/kernel/syscalls/.gitignore
@@ -99,6 +99,7 @@
/epoll_create1/epoll_create1_01
/epoll_wait/epoll_wait01
/epoll_wait/epoll_wait02
+/epoll_wait/epoll_wait03
/eventfd/eventfd01
/eventfd2/eventfd2_01
/eventfd2/eventfd2_02
diff --git a/testcases/kernel/syscalls/epoll_wait/epoll_wait03.c b/testcases/kernel/syscalls/epoll_wait/epoll_wait03.c
new file mode 100644
index 0000000..56b32da
--- /dev/null
+++ b/testcases/kernel/syscalls/epoll_wait/epoll_wait03.c
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2016 Fujitsu Ltd.
+ * Author: Guangwen Feng <fenggw-fnst@cn.fujitsu.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.
+ */
+
+/*
+ * Description:
+ * 1) epoll_wait(2) fails if epfd is not a valid file descriptor
+ * 2) epoll_wait(2) fails if epfd is not an epoll file descriptor
+ * 3) epoll_wait(2) fails if maxevents is less than zero
+ * 4) epoll_wait(2) fails if maxevents is equal to zero
+ * 5) epoll_wait(2) fails if the memory area pointed to by events
+ * is not accessible with write permissions.
+ *
+ * Expected Result:
+ * 1) epoll_wait(2) should return -1 and set errno to EBADF
+ * 2) epoll_wait(2) should return -1 and set errno to EINVAL
+ * 3) epoll_wait(2) should return -1 and set errno to EINVAL
+ * 4) epoll_wait(2) should return -1 and set errno to EINVAL
+ * 5) epoll_wait(2) should return -1 and set errno to EFAULT
+ */
+
+#include <sys/epoll.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include "test.h"
+#include "safe_macros.h"
+
+static int page_size, fds[2], epfd, inv_epfd, bad_epfd = -1;
+
+static struct epoll_event epevs[1] = {
+ {.events = EPOLLOUT}
+};
+
+static struct epoll_event *ev_rdwr = epevs;
+static struct epoll_event *ev_rdonly;
+
+static struct test_case_t {
+ int *epfd;
+ struct epoll_event **ev;
+ int maxevents;
+ int exp_errno;
+} tc[] = {
+ /* test1 */
+ {&bad_epfd, &ev_rdwr, 1, EBADF},
+ /* test2 */
+ {&inv_epfd, &ev_rdwr, 1, EINVAL},
+ /* test3 */
+ {&epfd, &ev_rdwr, -1, EINVAL},
+ /* test4 */
+ {&epfd, &ev_rdwr, 0, EINVAL},
+ /* test5 */
+ {&epfd, &ev_rdonly, 1, EFAULT}
+};
+
+char *TCID = "epoll_wait03";
+int TST_TOTAL = ARRAY_SIZE(tc);
+
+static void setup(void);
+static void verify_epoll_wait(struct test_case_t *tc);
+static void cleanup(void);
+
+int main(int ac, char **av)
+{
+ int lc, i;
+
+ tst_parse_opts(ac, av, NULL, NULL);
+
+ setup();
+
+ for (lc = 0; TEST_LOOPING(lc); lc++) {
+ tst_count = 0;
+
+ for (i = 0; i < TST_TOTAL; i++)
+ verify_epoll_wait(&tc[i]);
+ }
+
+ cleanup();
+ tst_exit();
+}
+
+static void setup(void)
+{
+ tst_sig(NOFORK, DEF_HANDLER, cleanup);
+
+ TEST_PAUSE;
+
+ page_size = getpagesize();
+
+ ev_rdonly = SAFE_MMAP(NULL, NULL, page_size, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+
+ SAFE_PIPE(NULL, fds);
+
+ epfd = epoll_create(1);
+ if (epfd == -1) {
+ tst_brkm(TBROK | TERRNO, cleanup,
+ "failed to create epoll instance");
+ }
+
+ epevs[0].data.fd = fds[1];
+
+ if (mprotect(ev_rdonly, page_size, PROT_READ)) {
+ tst_brkm(TBROK | TERRNO, cleanup,
+ "failed to set memory area read-only");
+ }
+
+ if (epoll_ctl(epfd, EPOLL_CTL_ADD, fds[1], &epevs[0])) {
+ tst_brkm(TBROK | TERRNO, cleanup,
+ "failed to register epoll target");
+ }
+}
+
+static void verify_epoll_wait(struct test_case_t *tc)
+{
+ TEST(epoll_wait(*(tc->epfd), *(tc->ev), tc->maxevents, -1));
+ if (TEST_RETURN != -1) {
+ tst_resm(TFAIL, "epoll_wait() succeed unexpectedly");
+ } else {
+ if (tc->exp_errno == TEST_ERRNO) {
+ tst_resm(TPASS | TTERRNO,
+ "epoll_wait() fails as expected");
+ } else {
+ tst_resm(TFAIL | TTERRNO,
+ "epoll_wait() fails unexpectedly, "
+ "expected %d: %s", tc->exp_errno,
+ tst_strerrno(tc->exp_errno));
+ }
+ }
+}
+
+static void cleanup(void)
+{
+ if (epfd > 0 && close(epfd))
+ tst_resm(TWARN | TERRNO, "failed to close epfd");
+
+ if (close(fds[0]))
+ tst_resm(TWARN | TERRNO, "close(fds[0]) failed");
+
+ if (close(fds[1]))
+ tst_resm(TWARN | TERRNO, "close(fds[1]) failed");
+}
--
1.8.4.2
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