From: Daniel Wagner <[email protected]>
When starting ConnMan we create under /sys/fs/cgroup a new
directory called connman where we mount for the time beeing
the net_cls controller.
---
src/cgroup.c | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 92 insertions(+)
diff --git a/src/cgroup.c b/src/cgroup.c
index 712274a..febb895 100644
--- a/src/cgroup.c
+++ b/src/cgroup.c
@@ -23,16 +23,108 @@
#include <config.h>
#endif
+#include <sys/mount.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+
#include "connman.h"
+#define CGROUP_PATH "/sys/fs/cgroup/connman"
+
+static connman_bool_t enabled;
+
+static int check_mount_point(const char *path)
+{
+ struct stat st;
+ char *parent, *end;
+ int l, err;
+
+ err = lstat(path, &st);
+ if (err < 0) {
+ if (errno == ENOENT)
+ return 0;
+ return err;
+ }
+
+ end = rindex(path, '/');
+ l = end - path;
+ parent = g_strndup(path, l);
+
+ err = lstat(parent, &st);
+ g_free(parent);
+
+ return err;
+}
+
+static int cgroup_create(const char *path, const char *controller)
+{
+ int err;
+
+ err = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
+ if (err < 0 && errno != EEXIST) {
+ err = -errno;
+ DBG("Could not create %s: %s", path, strerror(errno));
+ return err;
+ }
+
+ err = mount("cgroup", path, "cgroup",
+ MS_NOSUID|MS_NOEXEC|MS_NODEV, controller);
+ if (err < 0) {
+ err = -errno;
+ DBG("Could not mount %s: %s", path, strerror(errno));
+ unlink(path);
+ }
+
+ return err;
+}
+
+static int cgroup_setup(void)
+{
+ int err;
+
+ err = check_mount_point(CGROUP_PATH);
+ if (err < 0)
+ return err;
+
+ err = cgroup_create(CGROUP_PATH, "net_cls");
+ if (err < 0)
+ return err;
+
+ return 0;
+
+}
+
+static void cgroup_cleanup(void)
+{
+ umount(CGROUP_PATH);
+ rmdir(CGROUP_PATH);
+}
+
int __connman_cgroup_init(void)
{
+ int err;
+
DBG("");
+ err = cgroup_setup();
+ if (err < 0) {
+ connman_error("Could not create ConnMan cgroup");
+ return err;
+ }
+
+ enabled = TRUE;
+
return 0;
}
void __connman_cgroup_cleanup(void)
{
DBG("");
+
+ if (enabled == FALSE)
+ return;
+
+ cgroup_cleanup();
}
--
1.7.12.rc1.16.g05a20c8
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