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-rw-r--r--src/core/cgroup.c106
-rw-r--r--src/core/cgroup.h9
-rw-r--r--src/core/dbus-mount.c2
-rw-r--r--src/core/dbus-scope.c2
-rw-r--r--src/core/dbus-service.c2
-rw-r--r--src/core/dbus-slice.c2
-rw-r--r--src/core/dbus-socket.c2
-rw-r--r--src/core/dbus-swap.c2
-rw-r--r--src/core/unit.c14
-rw-r--r--src/core/unit.h5
-rw-r--r--src/test/test-cgroup-mask.c48
11 files changed, 150 insertions, 44 deletions
diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index c2b1b7d38..f0420ebc0 100644
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -335,7 +335,7 @@ CGroupControllerMask cgroup_context_get_mask(CGroupContext *c) {
return mask;
}
-static CGroupControllerMask unit_get_cgroup_mask(Unit *u) {
+CGroupControllerMask unit_get_cgroup_mask(Unit *u) {
CGroupContext *c;
c = unit_get_cgroup_context(u);
@@ -345,24 +345,52 @@ static CGroupControllerMask unit_get_cgroup_mask(Unit *u) {
return cgroup_context_get_mask(c);
}
-static CGroupControllerMask unit_get_members_mask(Unit *u) {
+CGroupControllerMask unit_get_members_mask(Unit *u) {
assert(u);
+
+ if (u->cgroup_members_mask_valid)
+ return u->cgroup_members_mask;
+
+ u->cgroup_members_mask = 0;
+
+ if (u->type == UNIT_SLICE) {
+ Unit *member;
+ Iterator i;
+
+ SET_FOREACH(member, u->dependencies[UNIT_BEFORE], i) {
+
+ if (member == u)
+ continue;
+
+ if (UNIT_DEREF(member->slice) != u)
+ continue;
+
+ u->cgroup_members_mask |=
+ unit_get_cgroup_mask(member) |
+ unit_get_members_mask(member);
+ }
+ }
+
+ u->cgroup_members_mask_valid = true;
return u->cgroup_members_mask;
}
-static CGroupControllerMask unit_get_siblings_mask(Unit *u) {
+CGroupControllerMask unit_get_siblings_mask(Unit *u) {
+ CGroupControllerMask m;
+
assert(u);
- if (!UNIT_ISSET(u->slice))
- return 0;
+ if (UNIT_ISSET(u->slice))
+ m = unit_get_members_mask(UNIT_DEREF(u->slice));
+ else
+ m = unit_get_cgroup_mask(u) | unit_get_members_mask(u);
/* Sibling propagation is only relevant for weight-based
* controllers, so let's mask out everything else */
- return unit_get_members_mask(UNIT_DEREF(u->slice)) &
- (CGROUP_CPU|CGROUP_BLKIO|CGROUP_CPUACCT);
+ return m & (CGROUP_CPU|CGROUP_BLKIO|CGROUP_CPUACCT);
}
-static CGroupControllerMask unit_get_target_mask(Unit *u) {
+CGroupControllerMask unit_get_target_mask(Unit *u) {
CGroupControllerMask mask;
mask = unit_get_cgroup_mask(u) | unit_get_members_mask(u) | unit_get_siblings_mask(u);
@@ -373,19 +401,57 @@ static CGroupControllerMask unit_get_target_mask(Unit *u) {
/* Recurse from a unit up through its containing slices, propagating
* mask bits upward. A unit is also member of itself. */
-void unit_update_member_masks(Unit *u) {
- u->cgroup_members_mask |= unit_get_cgroup_mask(u);
+void unit_update_cgroup_members_masks(Unit *u) {
+ CGroupControllerMask m;
+ bool more;
+
+ assert(u);
+
+ /* Calculate subtree mask */
+ m = unit_get_cgroup_mask(u) | unit_get_members_mask(u);
+
+ /* See if anything changed from the previous invocation. If
+ * not, we're done. */
+ if (u->cgroup_subtree_mask_valid && m == u->cgroup_subtree_mask)
+ return;
+
+ more =
+ u->cgroup_subtree_mask_valid &&
+ ((m & ~u->cgroup_subtree_mask) != 0) &&
+ ((~m & u->cgroup_subtree_mask) == 0);
+
+ u->cgroup_subtree_mask = m;
+ u->cgroup_subtree_mask_valid = true;
+
if (UNIT_ISSET(u->slice)) {
Unit *s = UNIT_DEREF(u->slice);
- s->cgroup_members_mask |= u->cgroup_members_mask;
- unit_update_member_masks(s);
+
+ if (more)
+ /* There's more set now than before. We
+ * propagate the new mask to the parent's mask
+ * (not caring if it actually was valid or
+ * not). */
+
+ s->cgroup_members_mask |= m;
+
+ else
+ /* There's less set now than before (or we
+ * don't know), we need to recalculate
+ * everything, so let's invalidate the
+ * parent's members mask */
+
+ s->cgroup_members_mask_valid = false;
+
+ /* And now make sure that this change also hits our
+ * grandparents */
+ unit_update_cgroup_members_masks(s);
}
}
static int unit_create_cgroups(Unit *u, CGroupControllerMask mask) {
_cleanup_free_ char *path;
- int r;
bool was_in_hash = false;
+ int r;
assert(u);
@@ -424,13 +490,15 @@ static int unit_create_cgroups(Unit *u, CGroupControllerMask mask) {
}
u->cgroup_realized = true;
- u->cgroup_mask = mask;
+ u->cgroup_realized_mask = mask;
return 0;
}
static bool unit_has_mask_realized(Unit *u, CGroupControllerMask mask) {
- return u->cgroup_realized && u->cgroup_mask == mask;
+ assert(u);
+
+ return u->cgroup_realized && u->cgroup_realized_mask == mask;
}
/* Check if necessary controllers and attributes for a unit are in place.
@@ -452,7 +520,6 @@ static int unit_realize_cgroup_now(Unit *u) {
mask = unit_get_target_mask(u);
- /* TODO: Consider skipping this check. It may be redundant. */
if (unit_has_mask_realized(u, mask))
return 0;
@@ -541,7 +608,6 @@ static void unit_queue_siblings(Unit *u) {
int unit_realize_cgroup(Unit *u) {
CGroupContext *c;
- int r;
assert(u);
@@ -564,9 +630,7 @@ int unit_realize_cgroup(Unit *u) {
unit_queue_siblings(u);
/* And realize this one now (and apply the values) */
- r = unit_realize_cgroup_now(u);
-
- return r;
+ return unit_realize_cgroup_now(u);
}
void unit_destroy_cgroup(Unit *u) {
@@ -586,7 +650,7 @@ void unit_destroy_cgroup(Unit *u) {
free(u->cgroup_path);
u->cgroup_path = NULL;
u->cgroup_realized = false;
- u->cgroup_mask = 0;
+ u->cgroup_realized_mask = 0;
}
diff --git a/src/core/cgroup.h b/src/core/cgroup.h
index 25f40f7b6..be717ad87 100644
--- a/src/core/cgroup.h
+++ b/src/core/cgroup.h
@@ -90,12 +90,19 @@ void cgroup_context_init(CGroupContext *c);
void cgroup_context_done(CGroupContext *c);
void cgroup_context_dump(CGroupContext *c, FILE* f, const char *prefix);
void cgroup_context_apply(CGroupContext *c, CGroupControllerMask mask, const char *path);
+
CGroupControllerMask cgroup_context_get_mask(CGroupContext *c);
void cgroup_context_free_device_allow(CGroupContext *c, CGroupDeviceAllow *a);
void cgroup_context_free_blockio_device_weight(CGroupContext *c, CGroupBlockIODeviceWeight *w);
void cgroup_context_free_blockio_device_bandwidth(CGroupContext *c, CGroupBlockIODeviceBandwidth *b);
+CGroupControllerMask unit_get_cgroup_mask(Unit *u);
+CGroupControllerMask unit_get_siblings_mask(Unit *u);
+CGroupControllerMask unit_get_members_mask(Unit *u);
+CGroupControllerMask unit_get_target_mask(Unit *u);
+
+void unit_update_cgroup_members_masks(Unit *u);
int unit_realize_cgroup(Unit *u);
void unit_destroy_cgroup(Unit *u);
@@ -113,5 +120,3 @@ int manager_notify_cgroup_empty(Manager *m, const char *group);
const char* cgroup_device_policy_to_string(CGroupDevicePolicy i) _const_;
CGroupDevicePolicy cgroup_device_policy_from_string(const char *s) _pure_;
-
-void unit_update_member_masks(Unit *u);
diff --git a/src/core/dbus-mount.c b/src/core/dbus-mount.c
index 28f0e9071..e64d3eaa5 100644
--- a/src/core/dbus-mount.c
+++ b/src/core/dbus-mount.c
@@ -143,6 +143,8 @@ int bus_mount_set_property(
int bus_mount_commit_properties(Unit *u) {
assert(u);
+ unit_update_cgroup_members_masks(u);
unit_realize_cgroup(u);
+
return 0;
}
diff --git a/src/core/dbus-scope.c b/src/core/dbus-scope.c
index d02569608..73b7bbf18 100644
--- a/src/core/dbus-scope.c
+++ b/src/core/dbus-scope.c
@@ -187,7 +187,9 @@ int bus_scope_set_property(
int bus_scope_commit_properties(Unit *u) {
assert(u);
+ unit_update_cgroup_members_masks(u);
unit_realize_cgroup(u);
+
return 0;
}
diff --git a/src/core/dbus-service.c b/src/core/dbus-service.c
index 73cf17541..0451790d8 100644
--- a/src/core/dbus-service.c
+++ b/src/core/dbus-service.c
@@ -258,6 +258,8 @@ int bus_service_set_property(
int bus_service_commit_properties(Unit *u) {
assert(u);
+ unit_update_cgroup_members_masks(u);
unit_realize_cgroup(u);
+
return 0;
}
diff --git a/src/core/dbus-slice.c b/src/core/dbus-slice.c
index 2a48ea455..8bc90b1da 100644
--- a/src/core/dbus-slice.c
+++ b/src/core/dbus-slice.c
@@ -48,6 +48,8 @@ int bus_slice_set_property(
int bus_slice_commit_properties(Unit *u) {
assert(u);
+ unit_update_cgroup_members_masks(u);
unit_realize_cgroup(u);
+
return 0;
}
diff --git a/src/core/dbus-socket.c b/src/core/dbus-socket.c
index bb9d41990..67a562775 100644
--- a/src/core/dbus-socket.c
+++ b/src/core/dbus-socket.c
@@ -145,6 +145,8 @@ int bus_socket_set_property(
int bus_socket_commit_properties(Unit *u) {
assert(u);
+ unit_update_cgroup_members_masks(u);
unit_realize_cgroup(u);
+
return 0;
}
diff --git a/src/core/dbus-swap.c b/src/core/dbus-swap.c
index 7bd05db41..93eae53c2 100644
--- a/src/core/dbus-swap.c
+++ b/src/core/dbus-swap.c
@@ -88,6 +88,8 @@ int bus_swap_set_property(
int bus_swap_commit_properties(Unit *u) {
assert(u);
+ unit_update_cgroup_members_masks(u);
unit_realize_cgroup(u);
+
return 0;
}
diff --git a/src/core/unit.c b/src/core/unit.c
index 0277675f6..b91fcf195 100644
--- a/src/core/unit.c
+++ b/src/core/unit.c
@@ -778,7 +778,7 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
prefix, strna(unit_slice_name(u)),
prefix, strna(u->cgroup_path),
prefix, yes_no(u->cgroup_realized),
- prefix, u->cgroup_mask,
+ prefix, u->cgroup_realized_mask,
prefix, u->cgroup_members_mask);
SET_FOREACH(t, u->names, i)
@@ -1056,21 +1056,17 @@ int unit_load(Unit *u) {
goto fail;
}
- unit_update_member_masks(u);
-
r = unit_add_mount_links(u);
if (r < 0)
goto fail;
- if (u->on_failure_job_mode == JOB_ISOLATE &&
- set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) {
-
- log_error_unit(u->id,
- "More than one OnFailure= dependencies specified for %s but OnFailureJobMode=isolate set. Refusing.", u->id);
-
+ if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) {
+ log_error_unit(u->id, "More than one OnFailure= dependencies specified for %s but OnFailureJobMode=isolate set. Refusing.", u->id);
r = -EINVAL;
goto fail;
}
+
+ unit_update_cgroup_members_masks(u);
}
assert((u->load_state != UNIT_MERGED) == !u->merged_into);
diff --git a/src/core/unit.h b/src/core/unit.h
index c104a8a9d..808929e64 100644
--- a/src/core/unit.h
+++ b/src/core/unit.h
@@ -177,7 +177,8 @@ struct Unit {
/* Counterparts in the cgroup filesystem */
char *cgroup_path;
- CGroupControllerMask cgroup_mask;
+ CGroupControllerMask cgroup_realized_mask;
+ CGroupControllerMask cgroup_subtree_mask;
CGroupControllerMask cgroup_members_mask;
UnitRef slice;
@@ -266,6 +267,8 @@ struct Unit {
bool in_audit:1;
bool cgroup_realized:1;
+ bool cgroup_members_mask_valid:1;
+ bool cgroup_subtree_mask_valid:1;
};
struct UnitStatusMessageFormats {
diff --git a/src/test/test-cgroup-mask.c b/src/test/test-cgroup-mask.c
index 99c8ceea7..3414ed4d6 100644
--- a/src/test/test-cgroup-mask.c
+++ b/src/test/test-cgroup-mask.c
@@ -33,7 +33,7 @@
static int test_cgroup_mask(void) {
Manager *m;
- Unit *son, *daughter, *parent, *root;
+ Unit *son, *daughter, *parent, *root, *grandchild, *parent_deep;
FILE *serial = NULL;
FDSet *fdset = NULL;
int r;
@@ -53,24 +53,50 @@ static int test_cgroup_mask(void) {
assert_se(manager_load_unit(m, "parent.slice", NULL, NULL, &parent) >= 0);
assert_se(manager_load_unit(m, "son.service", NULL, NULL, &son) >= 0);
assert_se(manager_load_unit(m, "daughter.service", NULL, NULL, &daughter) >= 0);
+ assert_se(manager_load_unit(m, "grandchild.service", NULL, NULL, &grandchild) >= 0);
+ assert_se(manager_load_unit(m, "parent-deep.slice", NULL, NULL, &parent_deep) >= 0);
assert(parent->load_state == UNIT_LOADED);
assert(son->load_state == UNIT_LOADED);
assert(daughter->load_state == UNIT_LOADED);
+ assert(grandchild->load_state == UNIT_LOADED);
+ assert(parent_deep->load_state == UNIT_LOADED);
assert(UNIT_DEREF(son->slice) == parent);
assert(UNIT_DEREF(daughter->slice) == parent);
+ assert(UNIT_DEREF(parent_deep->slice) == parent);
+ assert(UNIT_DEREF(grandchild->slice) == parent_deep);
root = UNIT_DEREF(parent->slice);
/* Verify per-unit cgroups settings. */
- assert(cgroup_context_get_mask(unit_get_cgroup_context(son)) == (CGROUP_CPU | CGROUP_CPUACCT));
- assert(cgroup_context_get_mask(unit_get_cgroup_context(daughter)) == 0);
- assert(cgroup_context_get_mask(unit_get_cgroup_context(parent)) == CGROUP_BLKIO);
- assert(cgroup_context_get_mask(unit_get_cgroup_context(root)) == 0);
-
- /* Verify aggregation of controller masks. */
- assert(son->cgroup_members_mask == (CGROUP_CPU | CGROUP_CPUACCT));
- assert(daughter->cgroup_members_mask == 0);
- assert(parent->cgroup_members_mask == (CGROUP_CPU | CGROUP_CPUACCT | CGROUP_BLKIO));
- assert(root->cgroup_members_mask == (CGROUP_CPU | CGROUP_CPUACCT | CGROUP_BLKIO));
+ assert(unit_get_cgroup_mask(son) == (CGROUP_CPU | CGROUP_CPUACCT));
+ assert(unit_get_cgroup_mask(daughter) == 0);
+ assert(unit_get_cgroup_mask(grandchild) == 0);
+ assert(unit_get_cgroup_mask(parent_deep) == CGROUP_MEMORY);
+ assert(unit_get_cgroup_mask(parent) == CGROUP_BLKIO);
+ assert(unit_get_cgroup_mask(root) == 0);
+
+ /* Verify aggregation of member masks */
+ assert(unit_get_members_mask(son) == 0);
+ assert(unit_get_members_mask(daughter) == 0);
+ assert(unit_get_members_mask(grandchild) == 0);
+ assert(unit_get_members_mask(parent_deep) == 0);
+ assert(unit_get_members_mask(parent) == (CGROUP_CPU | CGROUP_CPUACCT | CGROUP_MEMORY));
+ assert(unit_get_members_mask(root) == (CGROUP_CPU | CGROUP_CPUACCT | CGROUP_BLKIO | CGROUP_MEMORY));
+
+ /* Verify aggregation of sibling masks. */
+ assert(unit_get_siblings_mask(son) == (CGROUP_CPU | CGROUP_CPUACCT));
+ assert(unit_get_siblings_mask(daughter) == (CGROUP_CPU | CGROUP_CPUACCT));
+ assert(unit_get_siblings_mask(grandchild) == 0);
+ assert(unit_get_siblings_mask(parent_deep) == (CGROUP_CPU | CGROUP_CPUACCT));
+ assert(unit_get_siblings_mask(parent) == (CGROUP_CPU | CGROUP_CPUACCT | CGROUP_BLKIO));
+ assert(unit_get_siblings_mask(root) == (CGROUP_CPU | CGROUP_CPUACCT | CGROUP_BLKIO));
+
+ /* Verify aggregation of target masks. */
+ assert(unit_get_target_mask(son) == (CGROUP_CPU | CGROUP_CPUACCT));
+ assert(unit_get_target_mask(daughter) == (CGROUP_CPU | CGROUP_CPUACCT));
+ assert(unit_get_target_mask(grandchild) == 0);
+ assert(unit_get_target_mask(parent_deep) == (CGROUP_CPU | CGROUP_CPUACCT | CGROUP_MEMORY));
+ assert(unit_get_target_mask(parent) == (CGROUP_CPU | CGROUP_CPUACCT | CGROUP_BLKIO | CGROUP_MEMORY));
+ assert(unit_get_target_mask(root) == (CGROUP_CPU | CGROUP_CPUACCT | CGROUP_BLKIO | CGROUP_MEMORY));
manager_free(m);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 02:23:47 +0000