#include <stdio.h>
#include <stdlib.h>
#include <mntent.h>
+#include <sys/stat.h>
+#include <sys/types.h>
#include "fio.h"
#include "flist.h"
#include "cgroup.h"
struct cgroup_member {
struct flist_head list;
char *root;
+ unsigned int cgroup_nodelete;
};
static char *find_cgroup_mnt(struct thread_data *td)
{
char *mntpoint = NULL;
- struct mntent *mnt;
+ struct mntent *mnt, dummy;
+ char buf[256] = {0};
FILE *f;
f = setmntent("/proc/mounts", "r");
return NULL;
}
- while ((mnt = getmntent(f)) != NULL) {
+ while ((mnt = getmntent_r(f, &dummy, buf, sizeof(buf))) != NULL) {
if (!strcmp(mnt->mnt_type, "cgroup") &&
strstr(mnt->mnt_opts, "blkio"))
break;
return mntpoint;
}
-static void add_cgroup(const char *name, struct flist_head *clist)
+static void add_cgroup(struct thread_data *td, const char *name,
+ struct flist_head *clist)
{
struct cgroup_member *cm;
+ if (!lock)
+ return;
+
cm = smalloc(sizeof(*cm));
+ if (!cm) {
+err:
+ log_err("fio: failed to allocate cgroup member\n");
+ return;
+ }
+
INIT_FLIST_HEAD(&cm->list);
cm->root = smalloc_strdup(name);
-
+ if (!cm->root) {
+ sfree(cm);
+ goto err;
+ }
+ if (td->o.cgroup_nodelete)
+ cm->cgroup_nodelete = 1;
fio_mutex_down(lock);
flist_add_tail(&cm->list, clist);
fio_mutex_up(lock);
struct flist_head *n, *tmp;
struct cgroup_member *cm;
+ if (!lock)
+ return;
+
fio_mutex_down(lock);
flist_for_each_safe(n, tmp, clist) {
cm = flist_entry(n, struct cgroup_member, list);
- rmdir(cm->root);
+ if (!cm->cgroup_nodelete)
+ rmdir(cm->root);
flist_del(&cm->list);
sfree(cm->root);
sfree(cm);
{
char tmp[256];
FILE *f;
-
+
sprintf(tmp, "%s/%s", path, filename);
f = fopen(tmp, "w");
if (!f) {
goto err;
}
} else
- add_cgroup(root, clist);
+ add_cgroup(td, root, clist);
if (td->o.cgroup_weight) {
if (write_int_to_file(td, root, "blkio.weight",
static void fio_init cgroup_init(void)
{
- lock = fio_mutex_init(1);
+ lock = fio_mutex_init(FIO_MUTEX_UNLOCKED);
+ if (!lock)
+ log_err("fio: failed to allocate cgroup lock\n");
}
static void fio_exit cgroup_exit(void)