X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fcore%2Fcgroup.c;h=6a6c5049b39df1377b571baa2d9e51e0fe80c8b4;hb=175a3d25d0e8596d4ba0759aea3f89ee228e7d6d;hp=d10f205a2ff431f807aa756fba53047c982fa11d;hpb=ddca82aca08712a302cfabdbe59f73ee9ed3f73a;p=elogind.git

diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index d10f205a2..6a6c5049b 100644
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -41,7 +41,7 @@ void cgroup_context_free_device_allow(CGroupContext *c, CGroupDeviceAllow *a) {
         assert(c);
         assert(a);
 
-        LIST_REMOVE(CGroupDeviceAllow, device_allow, c->device_allow, a);
+        LIST_REMOVE(device_allow, c->device_allow, a);
         free(a->path);
         free(a);
 }
@@ -50,7 +50,7 @@ void cgroup_context_free_blockio_device_weight(CGroupContext *c, CGroupBlockIODe
         assert(c);
         assert(w);
 
-        LIST_REMOVE(CGroupBlockIODeviceWeight, device_weights, c->blockio_device_weights, w);
+        LIST_REMOVE(device_weights, c->blockio_device_weights, w);
         free(w->path);
         free(w);
 }
@@ -59,7 +59,7 @@ void cgroup_context_free_blockio_device_bandwidth(CGroupContext *c, CGroupBlockI
         assert(c);
         assert(b);
 
-        LIST_REMOVE(CGroupBlockIODeviceBandwidth, device_bandwidths, c->blockio_device_bandwidths, b);
+        LIST_REMOVE(device_bandwidths, c->blockio_device_bandwidths, b);
         free(b->path);
         free(b);
 }
@@ -254,8 +254,9 @@ void cgroup_context_apply(CGroupContext *c, CGroupControllerMask mask, const cha
         }
 
         if (mask & CGROUP_MEMORY) {
-                char buf[DECIMAL_STR_MAX(uint64_t) + 1];
                 if (c->memory_limit != (uint64_t) -1) {
+                        char buf[DECIMAL_STR_MAX(uint64_t) + 1];
+
                         sprintf(buf, "%" PRIu64 "\n", c->memory_limit);
                         r = cg_set_attribute("memory", path, "memory.limit_in_bytes", buf);
                 } else
@@ -396,13 +397,13 @@ static int unit_create_cgroups(Unit *u, CGroupControllerMask mask) {
         }
 
         /* First, create our own group */
-        r = cg_create_with_mask(mask, path);
+        r = cg_create_everywhere(u->manager->cgroup_supported, mask, path);
         if (r < 0)
                 log_error("Failed to create cgroup %s: %s", path, strerror(-r));
 
         /* Then, possibly move things over */
-        if (u->cgroup_path && !streq(path, u->cgroup_path)) {
-                r = cg_migrate_with_mask(mask, u->cgroup_path, path);
+        if (u->cgroup_path) {
+                r = cg_migrate_everywhere(u->manager->cgroup_supported, u->cgroup_path, path);
                 if (r < 0)
                         log_error("Failed to migrate cgroup %s: %s", path, strerror(-r));
         }
@@ -425,7 +426,7 @@ static int unit_realize_cgroup_now(Unit *u) {
         assert(u);
 
         if (u->in_cgroup_queue) {
-                LIST_REMOVE(Unit, cgroup_queue, u->manager->cgroup_queue, u);
+                LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u);
                 u->in_cgroup_queue = false;
         }
 
@@ -449,7 +450,7 @@ static void unit_add_to_cgroup_queue(Unit *u) {
         if (u->in_cgroup_queue)
                 return;
 
-        LIST_PREPEND(Unit, cgroup_queue, u->manager->cgroup_queue, u);
+        LIST_PREPEND(cgroup_queue, u->manager->cgroup_queue, u);
         u->in_cgroup_queue = true;
 }
 
@@ -508,7 +509,7 @@ int unit_realize_cgroup(Unit *u) {
          * unit, we need to first create all parents, but there's more
          * actually: for the weight-based controllers we also need to
          * make sure that all our siblings (i.e. units that are in the
-         * same slice as we are) have cgroup too. Otherwise things
+         * same slice as we are) have cgroups, too. Otherwise things
          * would become very uneven as each of their processes would
          * get as much resources as all our group together. This call
          * will synchronously create the parent cgroups, but will
@@ -536,7 +537,7 @@ void unit_destroy_cgroup(Unit *u) {
         if (!u->cgroup_path)
                 return;
 
-        r = cg_trim_with_mask(u->cgroup_mask, u->cgroup_path, !unit_has_name(u, SPECIAL_ROOT_SLICE));
+        r = cg_trim_everywhere(u->manager->cgroup_supported, u->cgroup_path, !unit_has_name(u, SPECIAL_ROOT_SLICE));
         if (r < 0)
                 log_debug("Failed to destroy cgroup %s: %s", u->cgroup_path, strerror(-r));
 
@@ -588,8 +589,8 @@ pid_t unit_search_main_pid(Unit *u) {
 
 int manager_setup_cgroup(Manager *m) {
         _cleanup_free_ char *path = NULL;
+        char *e;
         int r;
-        char *e, *a;
 
         assert(m);
 
@@ -609,9 +610,13 @@ int manager_setup_cgroup(Manager *m) {
                 return r;
         }
 
-        /* Already in /system.slice? If so, let's cut this off again */
+        /* LEGACY: Already in /system.slice? If so, let's cut this
+         * off. This is to support live upgrades from older systemd
+         * versions where PID 1 was moved there. */
         if (m->running_as == SYSTEMD_SYSTEM) {
                 e = endswith(m->cgroup_root, "/" SPECIAL_SYSTEM_SLICE);
+                if (!e)
+                        e = endswith(m->cgroup_root, "/system");
                 if (e)
                         *e = 0;
         }
@@ -642,12 +647,8 @@ int manager_setup_cgroup(Manager *m) {
                         log_debug("Release agent already installed.");
         }
 
-        /* 4. Realize the system slice and put us in there */
-        if (m->running_as == SYSTEMD_SYSTEM) {
-                a = strappenda(m->cgroup_root, "/" SPECIAL_SYSTEM_SLICE);
-                r = cg_create_and_attach(SYSTEMD_CGROUP_CONTROLLER, a, 0);
-        } else
-                r = cg_create_and_attach(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, 0);
+        /* 4. Make sure we are in the root cgroup */
+        r = cg_create_and_attach(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_root, 0);
         if (r < 0) {
                 log_error("Failed to create root cgroup hierarchy: %s", strerror(-r));
                 return r;
@@ -666,6 +667,9 @@ int manager_setup_cgroup(Manager *m) {
         /* 6. Figure out which controllers are supported */
         m->cgroup_supported = cg_mask_supported();
 
+        /* 7.  Always enable hierarchial support if it exists... */
+        cg_set_attribute("memory", "/", "memory.use_hierarchy", "1");
+
         return 0;
 }