Split mutex.c and .h each into three files

[fio.git] / cgroup.c

diff --git a/cgroup.c b/cgroup.c
index f36683aeacf311561c6ba768565361c547fcd9bf..a297e2ac82e82f5145edfcb9cc509b23134a360b 100644 (file)
--- a/cgroup.c
+++ b/cgroup.c
@@ -22,7 +22,8 @@ struct cgroup_member {
 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");
@@ -31,7 +32,7 @@ static char *find_cgroup_mnt(struct thread_data *td)
                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;
@@ -51,9 +52,22 @@ static void add_cgroup(struct thread_data *td, const char *name,
 {
        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);
@@ -66,6 +80,9 @@ void cgroup_kill(struct flist_head *clist)
        struct flist_head *n, *tmp;
        struct cgroup_member *cm;
 
+       if (!lock)
+               return;
+
        fio_mutex_down(lock);
 
        flist_for_each_safe(n, tmp, clist) {
@@ -98,7 +115,7 @@ static int write_int_to_file(struct thread_data *td, const char *path,
 {
        char tmp[256];
        FILE *f;
-       
+
        sprintf(tmp, "%s/%s", path, filename);
        f = fopen(tmp, "w");
        if (!f) {
@@ -181,7 +198,9 @@ void cgroup_shutdown(struct thread_data *td, char **mnt)
 
 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)