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Diffstat (limited to 'src/core/cgroup.c')
-rw-r--r--src/core/cgroup.c54
1 files changed, 29 insertions, 25 deletions
diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index 5ee5bd795..e306b8bce 100644
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -288,14 +288,24 @@ static int lookup_block_device(const char *p, dev_t *dev) {
static int whitelist_device(const char *path, const char *node, const char *acc) {
char buf[2+DECIMAL_STR_MAX(dev_t)*2+2+4];
struct stat st;
+ bool ignore_notfound;
int r;
assert(path);
assert(acc);
+ if (node[0] == '-') {
+ /* Non-existent paths starting with "-" must be silently ignored */
+ node++;
+ ignore_notfound = true;
+ } else
+ ignore_notfound = false;
+
if (stat(node, &st) < 0) {
- log_warning("Couldn't stat device %s", node);
- return -errno;
+ if (errno == ENOENT && ignore_notfound)
+ return 0;
+
+ return log_warning_errno(errno, "Couldn't stat device %s: %m", node);
}
if (!S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode)) {
@@ -669,7 +679,7 @@ static void cgroup_context_apply(Unit *u, CGroupMask mask, ManagerState state) {
bool has_weight = cgroup_context_has_cpu_weight(c);
bool has_shares = cgroup_context_has_cpu_shares(c);
- if (cg_all_unified() > 0) {
+ if (cg_all_unified()) {
uint64_t weight;
if (has_weight)
@@ -849,7 +859,7 @@ static void cgroup_context_apply(Unit *u, CGroupMask mask, ManagerState state) {
}
if ((mask & CGROUP_MASK_MEMORY) && !is_root) {
- if (cg_all_unified() > 0) {
+ if (cg_all_unified()) {
uint64_t max;
uint64_t swap_max = CGROUP_LIMIT_MAX;
@@ -916,8 +926,8 @@ static void cgroup_context_apply(Unit *u, CGroupMask mask, ManagerState state) {
"/dev/pts/ptmx\0" "rw\0" /* /dev/pts/ptmx may not be duplicated, but accessed */
/* Allow /run/elogind/inaccessible/{chr,blk} devices for mapping InaccessiblePaths */
/* Allow /run/systemd/inaccessible/{chr,blk} devices for mapping InaccessiblePaths */
- "/run/systemd/inaccessible/chr\0" "rwm\0"
- "/run/systemd/inaccessible/blk\0" "rwm\0";
+ "-/run/systemd/inaccessible/chr\0" "rwm\0"
+ "-/run/systemd/inaccessible/blk\0" "rwm\0";
const char *x, *y;
@@ -1025,7 +1035,7 @@ CGroupMask unit_get_own_mask(Unit *u) {
e = unit_get_exec_context(u);
if (!e ||
exec_context_maintains_privileges(e) ||
- cg_all_unified() > 0)
+ cg_all_unified())
return _CGROUP_MASK_ALL;
}
@@ -1252,10 +1262,7 @@ int unit_watch_cgroup(Unit *u) {
return 0;
/* Only applies to the unified hierarchy */
- r = cg_unified(SYSTEMD_CGROUP_CONTROLLER);
- if (r < 0)
- return log_unit_error_errno(u, r, "Failed detect whether the unified hierarchy is used: %m");
- if (r == 0)
+ if (!cg_unified(SYSTEMD_CGROUP_CONTROLLER))
return 0;
/* Don't watch the root slice, it's pointless. */
@@ -1675,7 +1682,7 @@ int unit_watch_all_pids(Unit *u) {
if (!u->cgroup_path)
return -ENOENT;
- if (cg_unified(SYSTEMD_CGROUP_CONTROLLER) > 0) /* On unified we can use proper notifications */
+ if (cg_unified(SYSTEMD_CGROUP_CONTROLLER)) /* On unified we can use proper notifications */
return 0;
return unit_watch_pids_in_path(u, u->cgroup_path);
@@ -1749,7 +1756,7 @@ static int on_cgroup_inotify_event(sd_event_source *s, int fd, uint32_t revents,
int manager_setup_cgroup(Manager *m) {
_cleanup_free_ char *path = NULL;
CGroupController c;
- int r, all_unified, systemd_unified;
+ int r;
char *e;
assert(m);
@@ -1790,16 +1797,13 @@ int manager_setup_cgroup(Manager *m) {
if (r < 0)
return log_error_errno(r, "Cannot find cgroup mount point: %m");
- all_unified = cg_all_unified();
- systemd_unified = cg_unified(SYSTEMD_CGROUP_CONTROLLER);
-
- if (all_unified < 0 || systemd_unified < 0)
- return log_error_errno(all_unified < 0 ? all_unified : systemd_unified,
- "Couldn't determine if we are running in the unified hierarchy: %m");
+ r = cg_unified_flush();
+ if (r < 0)
+ return log_error_errno(r, "Couldn't determine if we are running in the unified hierarchy: %m");
- if (all_unified > 0)
+ if (cg_all_unified())
log_debug("Unified cgroup hierarchy is located at %s.", path);
- else if (systemd_unified > 0)
+ else if (cg_unified(SYSTEMD_CGROUP_CONTROLLER))
log_debug("Unified cgroup hierarchy is located at %s. Controllers are on legacy hierarchies.", path);
else
log_debug("Using cgroup controller " SYSTEMD_CGROUP_CONTROLLER ". File system hierarchy is at %s.", path);
@@ -1808,7 +1812,7 @@ int manager_setup_cgroup(Manager *m) {
const char *scope_path;
/* 3. Install agent */
- if (systemd_unified) {
+ if (cg_unified(SYSTEMD_CGROUP_CONTROLLER)) {
/* In the unified hierarchy we can get
* cgroup empty notifications via inotify. */
@@ -1886,7 +1890,7 @@ int manager_setup_cgroup(Manager *m) {
return log_error_errno(errno, "Failed to open pin file: %m");
/* 6. Always enable hierarchical support if it exists... */
- if (!all_unified)
+ if (!cg_all_unified())
(void) cg_set_attribute("memory", "/", "memory.use_hierarchy", "1");
}
@@ -2037,7 +2041,7 @@ int unit_get_memory_current(Unit *u, uint64_t *ret) {
if ((u->cgroup_realized_mask & CGROUP_MASK_MEMORY) == 0)
return -ENODATA;
- if (cg_all_unified() <= 0)
+ if (!cg_all_unified())
r = cg_get_attribute("memory", u->cgroup_path, "memory.usage_in_bytes", &v);
else
r = cg_get_attribute("memory", u->cgroup_path, "memory.current", &v);
@@ -2082,7 +2086,7 @@ static int unit_get_cpu_usage_raw(Unit *u, nsec_t *ret) {
if (!u->cgroup_path)
return -ENODATA;
- if (cg_all_unified() > 0) {
+ if (cg_all_unified()) {
const char *keys[] = { "usage_usec", NULL };
_cleanup_free_ char *val = NULL;
uint64_t us;
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-16 04:29:14 +0000