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cgroup-util: when attaching/creating cgroups in multiple hierarchies, take jointly mounted controlelrs into account
If we create a cgroup in one controller it might already have been created in another too, if we have jointly mounted controllers. Take that into consideration.
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commit
e353faa0d6
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@ -2110,6 +2110,7 @@ done:
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int cg_create_everywhere(CGroupMask supported, CGroupMask mask, const char *path) {
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CGroupController c;
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CGroupMask done;
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bool created;
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int r;
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@ -2134,20 +2135,28 @@ int cg_create_everywhere(CGroupMask supported, CGroupMask mask, const char *path
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if (r > 0)
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return created;
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supported &= CGROUP_MASK_V1;
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mask = CGROUP_MASK_EXTEND_JOINED(mask);
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done = 0;
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/* Otherwise, do the same in the other hierarchies */
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for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) {
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CGroupMask bit = CGROUP_CONTROLLER_TO_MASK(c);
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const char *n;
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if (!FLAGS_SET(CGROUP_MASK_V1, bit))
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if (!FLAGS_SET(supported, bit))
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continue;
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if (FLAGS_SET(done, bit))
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continue;
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n = cgroup_controller_to_string(c);
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if (FLAGS_SET(mask, bit))
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(void) cg_create(n, path);
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else if (FLAGS_SET(supported, bit))
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else
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(void) cg_trim(n, path, true);
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done |= CGROUP_MASK_EXTEND_JOINED(bit);
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}
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return created;
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@ -2155,6 +2164,7 @@ int cg_create_everywhere(CGroupMask supported, CGroupMask mask, const char *path
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int cg_attach_everywhere(CGroupMask supported, const char *path, pid_t pid, cg_migrate_callback_t path_callback, void *userdata) {
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CGroupController c;
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CGroupMask done;
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int r;
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r = cg_attach(SYSTEMD_CGROUP_CONTROLLER, path, pid);
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@ -2167,23 +2177,26 @@ int cg_attach_everywhere(CGroupMask supported, const char *path, pid_t pid, cg_m
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if (r > 0)
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return 0;
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supported &= CGROUP_MASK_V1;
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done = 0;
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for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) {
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CGroupMask bit = CGROUP_CONTROLLER_TO_MASK(c);
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const char *p = NULL;
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if (!FLAGS_SET(CGROUP_MASK_V1, bit))
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if (!FLAGS_SET(supported, bit))
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continue;
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if (!FLAGS_SET(supported, bit))
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if (FLAGS_SET(done, bit))
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continue;
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if (path_callback)
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p = path_callback(bit, userdata);
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if (!p)
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p = path;
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(void) cg_attach_fallback(cgroup_controller_to_string(c), p, pid);
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done |= CGROUP_MASK_EXTEND_JOINED(bit);
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}
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return 0;
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@ -2208,6 +2221,7 @@ int cg_attach_many_everywhere(CGroupMask supported, const char *path, Set* pids,
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int cg_migrate_everywhere(CGroupMask supported, const char *from, const char *to, cg_migrate_callback_t to_callback, void *userdata) {
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CGroupController c;
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CGroupMask done;
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int r = 0, q;
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if (!path_equal(from, to)) {
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@ -2222,30 +2236,34 @@ int cg_migrate_everywhere(CGroupMask supported, const char *from, const char *to
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if (q > 0)
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return r;
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supported &= CGROUP_MASK_V1;
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done = 0;
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for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) {
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CGroupMask bit = CGROUP_CONTROLLER_TO_MASK(c);
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const char *p = NULL;
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if (!FLAGS_SET(CGROUP_MASK_V1, bit))
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if (!FLAGS_SET(supported, bit))
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continue;
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if (!FLAGS_SET(supported, bit))
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if (FLAGS_SET(done, bit))
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continue;
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if (to_callback)
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p = to_callback(bit, userdata);
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if (!p)
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p = to;
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(void) cg_migrate_recursive_fallback(SYSTEMD_CGROUP_CONTROLLER, to, cgroup_controller_to_string(c), p, 0);
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done |= CGROUP_MASK_EXTEND_JOINED(bit);
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}
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return 0;
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return r;
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}
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int cg_trim_everywhere(CGroupMask supported, const char *path, bool delete_root) {
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CGroupController c;
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CGroupMask done;
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int r, q;
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r = cg_trim(SYSTEMD_CGROUP_CONTROLLER, path, delete_root);
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@ -2258,19 +2276,23 @@ int cg_trim_everywhere(CGroupMask supported, const char *path, bool delete_root)
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if (q > 0)
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return r;
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supported &= CGROUP_MASK_V1;
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done = 0;
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for (c = 0; c < _CGROUP_CONTROLLER_MAX; c++) {
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CGroupMask bit = CGROUP_CONTROLLER_TO_MASK(c);
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if (!FLAGS_SET(CGROUP_MASK_V1, bit))
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continue;
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if (!FLAGS_SET(supported, bit))
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continue;
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if (FLAGS_SET(done, bit))
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continue;
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(void) cg_trim(cgroup_controller_to_string(c), path, delete_root);
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done |= CGROUP_MASK_EXTEND_JOINED(bit);
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}
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return 0;
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return r;
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}
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int cg_mask_to_string(CGroupMask mask, char **ret) {
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