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cgroup-util: refactor cg_{ns,freezer,kill}_supported

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This commit is contained in:
Mike Yuan
2024-08-02 16:36:08 +02:00
parent 6e6d305573
commit 1daf575990
1 changed files with 21 additions and 21 deletions
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src/basic/cgroup-util.c
+21 -21
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@@ -208,19 +208,16 @@ int cg_read_event(
}
bool cg_ns_supported(void) {
static thread_local int enabled = -1;
static thread_local int supported = -1;
if (enabled >= 0)
return enabled;
if (supported >= 0)
return supported;
if (access("/proc/self/ns/cgroup", F_OK) < 0) {
if (errno != ENOENT)
log_debug_errno(errno, "Failed to check whether /proc/self/ns/cgroup is available, assuming not: %m");
enabled = false;
} else
enabled = true;
return enabled;
if (access("/proc/self/ns/cgroup", F_OK) >= 0)
return (supported = true);
if (errno != ENOENT)
log_debug_errno(errno, "Failed to check whether /proc/self/ns/cgroup is available, assuming not: %m");
return (supported = false);
}
bool cg_freezer_supported(void) {
@@ -229,9 +226,14 @@ bool cg_freezer_supported(void) {
if (supported >= 0)
return supported;
supported = cg_all_unified() > 0 && access("/sys/fs/cgroup/init.scope/cgroup.freeze", F_OK) == 0;
if (cg_all_unified() <= 0)
return (supported = false);
return supported;
if (access("/sys/fs/cgroup/init.scope/cgroup.freeze", F_OK) >= 0)
return (supported = true);
if (errno != ENOENT)
log_debug_errno(errno, "Failed to check whether cgroup freezer is available, assuming not: %m");
return (supported = false);
}
bool cg_kill_supported(void) {
@@ -241,15 +243,13 @@ bool cg_kill_supported(void) {
return supported;
if (cg_all_unified() <= 0)
supported = false;
else if (access("/sys/fs/cgroup/init.scope/cgroup.kill", F_OK) < 0) {
if (errno != ENOENT)
log_debug_errno(errno, "Failed to check if cgroup.kill is available, assuming not: %m");
supported = false;
} else
supported = true;
return (supported = false);
return supported;
if (access("/sys/fs/cgroup/init.scope/cgroup.kill", F_OK) >= 0)
return (supported = true);
if (errno != ENOENT)
log_debug_errno(errno, "Failed to check whether cgroup.kill is available, assuming not: %m");
return (supported = false);
}
int cg_enumerate_subgroups(const char *controller, const char *path, DIR **ret) {