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authorChristian Brauner <christian.brauner@ubuntu.com>2021-05-08 14:15:41 +0200
committerTejun Heo <tj@kernel.org>2021-05-10 10:41:11 -0400
commit8075e4f6c9904189ea04a853b5480451ec74e67d (patch)
treebb6ce96a080c094051042e855ac89c7edd69ecb5 /tools/testing/selftests
parenttests/cgroup: use cgroup.kill in cg_killall() (diff)
downloadlinux-dev-8075e4f6c9904189ea04a853b5480451ec74e67d.tar.xz
linux-dev-8075e4f6c9904189ea04a853b5480451ec74e67d.zip
tests/cgroup: move cg_wait_for(), cg_prepare_for_wait()
as they will be used by the tests for cgroup killing. Link: https://lore.kernel.org/r/20210503143922.3093755-4-brauner@kernel.org Cc: Tejun Heo <tj@kernel.org> Cc: cgroups@vger.kernel.org Reviewed-by: Shakeel Butt <shakeelb@google.com> Acked-by: Roman Gushchin <guro@fb.com> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'tools/testing/selftests')
-rw-r--r--tools/testing/selftests/cgroup/cgroup_util.c47
-rw-r--r--tools/testing/selftests/cgroup/cgroup_util.h2
-rw-r--r--tools/testing/selftests/cgroup/test_freezer.c57
3 files changed, 49 insertions, 57 deletions
diff --git a/tools/testing/selftests/cgroup/cgroup_util.c b/tools/testing/selftests/cgroup/cgroup_util.c
index f60f7d764690..623cec04ad42 100644
--- a/tools/testing/selftests/cgroup/cgroup_util.c
+++ b/tools/testing/selftests/cgroup/cgroup_util.c
@@ -5,10 +5,12 @@
#include <errno.h>
#include <fcntl.h>
#include <linux/limits.h>
+#include <poll.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <sys/inotify.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
@@ -580,3 +582,48 @@ int clone_into_cgroup_run_wait(const char *cgroup)
(void)clone_reap(pid, WEXITED);
return 0;
}
+
+int cg_prepare_for_wait(const char *cgroup)
+{
+ int fd, ret = -1;
+
+ fd = inotify_init1(0);
+ if (fd == -1)
+ return fd;
+
+ ret = inotify_add_watch(fd, cg_control(cgroup, "cgroup.events"),
+ IN_MODIFY);
+ if (ret == -1) {
+ close(fd);
+ fd = -1;
+ }
+
+ return fd;
+}
+
+int cg_wait_for(int fd)
+{
+ int ret = -1;
+ struct pollfd fds = {
+ .fd = fd,
+ .events = POLLIN,
+ };
+
+ while (true) {
+ ret = poll(&fds, 1, 10000);
+
+ if (ret == -1) {
+ if (errno == EINTR)
+ continue;
+
+ break;
+ }
+
+ if (ret > 0 && fds.revents & POLLIN) {
+ ret = 0;
+ break;
+ }
+ }
+
+ return ret;
+}
diff --git a/tools/testing/selftests/cgroup/cgroup_util.h b/tools/testing/selftests/cgroup/cgroup_util.h
index 5a1305dd1f0b..82e59cdf16e7 100644
--- a/tools/testing/selftests/cgroup/cgroup_util.h
+++ b/tools/testing/selftests/cgroup/cgroup_util.h
@@ -54,3 +54,5 @@ extern pid_t clone_into_cgroup(int cgroup_fd);
extern int clone_reap(pid_t pid, int options);
extern int clone_into_cgroup_run_wait(const char *cgroup);
extern int dirfd_open_opath(const char *dir);
+extern int cg_prepare_for_wait(const char *cgroup);
+extern int cg_wait_for(int fd);
diff --git a/tools/testing/selftests/cgroup/test_freezer.c b/tools/testing/selftests/cgroup/test_freezer.c
index 23d8fa4a3e4e..ff519029f6f4 100644
--- a/tools/testing/selftests/cgroup/test_freezer.c
+++ b/tools/testing/selftests/cgroup/test_freezer.c
@@ -7,9 +7,7 @@
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
-#include <poll.h>
#include <stdlib.h>
-#include <sys/inotify.h>
#include <string.h>
#include <sys/wait.h>
@@ -55,61 +53,6 @@ static int cg_freeze_nowait(const char *cgroup, bool freeze)
}
/*
- * Prepare for waiting on cgroup.events file.
- */
-static int cg_prepare_for_wait(const char *cgroup)
-{
- int fd, ret = -1;
-
- fd = inotify_init1(0);
- if (fd == -1) {
- debug("Error: inotify_init1() failed\n");
- return fd;
- }
-
- ret = inotify_add_watch(fd, cg_control(cgroup, "cgroup.events"),
- IN_MODIFY);
- if (ret == -1) {
- debug("Error: inotify_add_watch() failed\n");
- close(fd);
- fd = -1;
- }
-
- return fd;
-}
-
-/*
- * Wait for an event. If there are no events for 10 seconds,
- * treat this an error.
- */
-static int cg_wait_for(int fd)
-{
- int ret = -1;
- struct pollfd fds = {
- .fd = fd,
- .events = POLLIN,
- };
-
- while (true) {
- ret = poll(&fds, 1, 10000);
-
- if (ret == -1) {
- if (errno == EINTR)
- continue;
- debug("Error: poll() failed\n");
- break;
- }
-
- if (ret > 0 && fds.revents & POLLIN) {
- ret = 0;
- break;
- }
- }
-
- return ret;
-}
-
-/*
* Attach a task to the given cgroup and wait for a cgroup frozen event.
* All transient events (e.g. populated) are ignored.
*/