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-rw-r--r--src/libcore/dbus-cgroup.c699
1 files changed, 699 insertions, 0 deletions
diff --git a/src/libcore/dbus-cgroup.c b/src/libcore/dbus-cgroup.c
new file mode 100644
index 0000000000..859d155ec1
--- /dev/null
+++ b/src/libcore/dbus-cgroup.c
@@ -0,0 +1,699 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "alloc-util.h"
+#include "bus-util.h"
+#include "cgroup-util.h"
+#include "cgroup.h"
+#include "dbus-cgroup.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "path-util.h"
+
+static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_cgroup_device_policy, cgroup_device_policy, CGroupDevicePolicy);
+
+static int property_get_blockio_device_weight(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ CGroupContext *c = userdata;
+ CGroupBlockIODeviceWeight *w;
+ int r;
+
+ assert(bus);
+ assert(reply);
+ assert(c);
+
+ r = sd_bus_message_open_container(reply, 'a', "(st)");
+ if (r < 0)
+ return r;
+
+ LIST_FOREACH(device_weights, w, c->blockio_device_weights) {
+ r = sd_bus_message_append(reply, "(st)", w->path, w->weight);
+ if (r < 0)
+ return r;
+ }
+
+ return sd_bus_message_close_container(reply);
+}
+
+static int property_get_blockio_device_bandwidths(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ CGroupContext *c = userdata;
+ CGroupBlockIODeviceBandwidth *b;
+ int r;
+
+ assert(bus);
+ assert(reply);
+ assert(c);
+
+ r = sd_bus_message_open_container(reply, 'a', "(st)");
+ if (r < 0)
+ return r;
+
+ LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths) {
+
+ if (streq(property, "BlockIOReadBandwidth") != b->read)
+ continue;
+
+ r = sd_bus_message_append(reply, "(st)", b->path, b->bandwidth);
+ if (r < 0)
+ return r;
+ }
+
+ return sd_bus_message_close_container(reply);
+}
+
+static int property_get_device_allow(
+ sd_bus *bus,
+ const char *path,
+ const char *interface,
+ const char *property,
+ sd_bus_message *reply,
+ void *userdata,
+ sd_bus_error *error) {
+
+ CGroupContext *c = userdata;
+ CGroupDeviceAllow *a;
+ int r;
+
+ assert(bus);
+ assert(reply);
+ assert(c);
+
+ r = sd_bus_message_open_container(reply, 'a', "(ss)");
+ if (r < 0)
+ return r;
+
+ LIST_FOREACH(device_allow, a, c->device_allow) {
+ unsigned k = 0;
+ char rwm[4];
+
+ if (a->r)
+ rwm[k++] = 'r';
+ if (a->w)
+ rwm[k++] = 'w';
+ if (a->m)
+ rwm[k++] = 'm';
+
+ rwm[k] = 0;
+
+ r = sd_bus_message_append(reply, "(ss)", a->path, rwm);
+ if (r < 0)
+ return r;
+ }
+
+ return sd_bus_message_close_container(reply);
+}
+
+const sd_bus_vtable bus_cgroup_vtable[] = {
+ SD_BUS_VTABLE_START(0),
+ SD_BUS_PROPERTY("Delegate", "b", bus_property_get_bool, offsetof(CGroupContext, delegate), 0),
+ SD_BUS_PROPERTY("CPUAccounting", "b", bus_property_get_bool, offsetof(CGroupContext, cpu_accounting), 0),
+ SD_BUS_PROPERTY("CPUShares", "t", NULL, offsetof(CGroupContext, cpu_shares), 0),
+ SD_BUS_PROPERTY("StartupCPUShares", "t", NULL, offsetof(CGroupContext, startup_cpu_shares), 0),
+ SD_BUS_PROPERTY("CPUQuotaPerSecUSec", "t", bus_property_get_usec, offsetof(CGroupContext, cpu_quota_per_sec_usec), 0),
+ SD_BUS_PROPERTY("BlockIOAccounting", "b", bus_property_get_bool, offsetof(CGroupContext, blockio_accounting), 0),
+ SD_BUS_PROPERTY("BlockIOWeight", "t", NULL, offsetof(CGroupContext, blockio_weight), 0),
+ SD_BUS_PROPERTY("StartupBlockIOWeight", "t", NULL, offsetof(CGroupContext, startup_blockio_weight), 0),
+ SD_BUS_PROPERTY("BlockIODeviceWeight", "a(st)", property_get_blockio_device_weight, 0, 0),
+ SD_BUS_PROPERTY("BlockIOReadBandwidth", "a(st)", property_get_blockio_device_bandwidths, 0, 0),
+ SD_BUS_PROPERTY("BlockIOWriteBandwidth", "a(st)", property_get_blockio_device_bandwidths, 0, 0),
+ SD_BUS_PROPERTY("MemoryAccounting", "b", bus_property_get_bool, offsetof(CGroupContext, memory_accounting), 0),
+ SD_BUS_PROPERTY("MemoryLimit", "t", NULL, offsetof(CGroupContext, memory_limit), 0),
+ SD_BUS_PROPERTY("DevicePolicy", "s", property_get_cgroup_device_policy, offsetof(CGroupContext, device_policy), 0),
+ SD_BUS_PROPERTY("DeviceAllow", "a(ss)", property_get_device_allow, 0, 0),
+ SD_BUS_PROPERTY("TasksAccounting", "b", bus_property_get_bool, offsetof(CGroupContext, tasks_accounting), 0),
+ SD_BUS_PROPERTY("TasksMax", "t", NULL, offsetof(CGroupContext, tasks_max), 0),
+ SD_BUS_VTABLE_END
+};
+
+static int bus_cgroup_set_transient_property(
+ Unit *u,
+ CGroupContext *c,
+ const char *name,
+ sd_bus_message *message,
+ UnitSetPropertiesMode mode,
+ sd_bus_error *error) {
+
+ int r;
+
+ assert(u);
+ assert(c);
+ assert(name);
+ assert(message);
+
+ if (streq(name, "Delegate")) {
+ int b;
+
+ r = sd_bus_message_read(message, "b", &b);
+ if (r < 0)
+ return r;
+
+ if (mode != UNIT_CHECK) {
+ c->delegate = b;
+ unit_write_drop_in_private(u, mode, name, b ? "Delegate=yes" : "Delegate=no");
+ }
+
+ return 1;
+ }
+
+ return 0;
+}
+
+int bus_cgroup_set_property(
+ Unit *u,
+ CGroupContext *c,
+ const char *name,
+ sd_bus_message *message,
+ UnitSetPropertiesMode mode,
+ sd_bus_error *error) {
+
+ int r;
+
+ assert(u);
+ assert(c);
+ assert(name);
+ assert(message);
+
+ if (streq(name, "CPUAccounting")) {
+ int b;
+
+ r = sd_bus_message_read(message, "b", &b);
+ if (r < 0)
+ return r;
+
+ if (mode != UNIT_CHECK) {
+ c->cpu_accounting = b;
+ unit_invalidate_cgroup(u, CGROUP_MASK_CPUACCT|CGROUP_MASK_CPU);
+ unit_write_drop_in_private(u, mode, name, b ? "CPUAccounting=yes" : "CPUAccounting=no");
+ }
+
+ return 1;
+
+ } else if (streq(name, "CPUShares")) {
+ uint64_t shares;
+
+ r = sd_bus_message_read(message, "t", &shares);
+ if (r < 0)
+ return r;
+
+ if (!CGROUP_CPU_SHARES_IS_OK(shares))
+ return sd_bus_error_set_errnof(error, EINVAL, "CPUShares value out of range");
+
+ if (mode != UNIT_CHECK) {
+ c->cpu_shares = shares;
+ unit_invalidate_cgroup(u, CGROUP_MASK_CPU);
+
+ if (shares == CGROUP_CPU_SHARES_INVALID)
+ unit_write_drop_in_private(u, mode, name, "CPUShares=");
+ else
+ unit_write_drop_in_private_format(u, mode, name, "CPUShares=%" PRIu64, shares);
+ }
+
+ return 1;
+
+ } else if (streq(name, "StartupCPUShares")) {
+ uint64_t shares;
+
+ r = sd_bus_message_read(message, "t", &shares);
+ if (r < 0)
+ return r;
+
+ if (!CGROUP_CPU_SHARES_IS_OK(shares))
+ return sd_bus_error_set_errnof(error, EINVAL, "StartupCPUShares value out of range");
+
+ if (mode != UNIT_CHECK) {
+ c->startup_cpu_shares = shares;
+ unit_invalidate_cgroup(u, CGROUP_MASK_CPU);
+
+ if (shares == CGROUP_CPU_SHARES_INVALID)
+ unit_write_drop_in_private(u, mode, name, "StartupCPUShares=");
+ else
+ unit_write_drop_in_private_format(u, mode, name, "StartupCPUShares=%" PRIu64, shares);
+ }
+
+ return 1;
+
+ } else if (streq(name, "CPUQuotaPerSecUSec")) {
+ uint64_t u64;
+
+ r = sd_bus_message_read(message, "t", &u64);
+ if (r < 0)
+ return r;
+
+ if (u64 <= 0)
+ return sd_bus_error_set_errnof(error, EINVAL, "CPUQuotaPerSecUSec value out of range");
+
+ if (mode != UNIT_CHECK) {
+ c->cpu_quota_per_sec_usec = u64;
+ unit_invalidate_cgroup(u, CGROUP_MASK_CPU);
+ unit_write_drop_in_private_format(u, mode, "CPUQuota", "CPUQuota=%0.f%%", (double) (c->cpu_quota_per_sec_usec / 10000));
+ }
+
+ return 1;
+
+ } else if (streq(name, "BlockIOAccounting")) {
+ int b;
+
+ r = sd_bus_message_read(message, "b", &b);
+ if (r < 0)
+ return r;
+
+ if (mode != UNIT_CHECK) {
+ c->blockio_accounting = b;
+ unit_invalidate_cgroup(u, CGROUP_MASK_BLKIO);
+ unit_write_drop_in_private(u, mode, name, b ? "BlockIOAccounting=yes" : "BlockIOAccounting=no");
+ }
+
+ return 1;
+
+ } else if (streq(name, "BlockIOWeight")) {
+ uint64_t weight;
+
+ r = sd_bus_message_read(message, "t", &weight);
+ if (r < 0)
+ return r;
+
+ if (!CGROUP_BLKIO_WEIGHT_IS_OK(weight))
+ return sd_bus_error_set_errnof(error, EINVAL, "BlockIOWeight value out of range");
+
+ if (mode != UNIT_CHECK) {
+ c->blockio_weight = weight;
+ unit_invalidate_cgroup(u, CGROUP_MASK_BLKIO);
+
+ if (weight == CGROUP_BLKIO_WEIGHT_INVALID)
+ unit_write_drop_in_private(u, mode, name, "BlockIOWeight=");
+ else
+ unit_write_drop_in_private_format(u, mode, name, "BlockIOWeight=%" PRIu64, weight);
+ }
+
+ return 1;
+
+ } else if (streq(name, "StartupBlockIOWeight")) {
+ uint64_t weight;
+
+ r = sd_bus_message_read(message, "t", &weight);
+ if (r < 0)
+ return r;
+
+ if (CGROUP_BLKIO_WEIGHT_IS_OK(weight))
+ return sd_bus_error_set_errnof(error, EINVAL, "StartupBlockIOWeight value out of range");
+
+ if (mode != UNIT_CHECK) {
+ c->startup_blockio_weight = weight;
+ unit_invalidate_cgroup(u, CGROUP_MASK_BLKIO);
+
+ if (weight == CGROUP_BLKIO_WEIGHT_INVALID)
+ unit_write_drop_in_private(u, mode, name, "StartupBlockIOWeight=");
+ else
+ unit_write_drop_in_private_format(u, mode, name, "StartupBlockIOWeight=%" PRIu64, weight);
+ }
+
+ return 1;
+
+ } else if (streq(name, "BlockIOReadBandwidth") || streq(name, "BlockIOWriteBandwidth")) {
+ const char *path;
+ bool read = true;
+ unsigned n = 0;
+ uint64_t u64;
+
+ if (streq(name, "BlockIOWriteBandwidth"))
+ read = false;
+
+ r = sd_bus_message_enter_container(message, 'a', "(st)");
+ if (r < 0)
+ return r;
+
+ while ((r = sd_bus_message_read(message, "(st)", &path, &u64)) > 0) {
+
+ if (mode != UNIT_CHECK) {
+ CGroupBlockIODeviceBandwidth *a = NULL, *b;
+
+ LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths) {
+ if (path_equal(path, b->path) && read == b->read) {
+ a = b;
+ break;
+ }
+ }
+
+ if (!a) {
+ a = new0(CGroupBlockIODeviceBandwidth, 1);
+ if (!a)
+ return -ENOMEM;
+
+ a->read = read;
+ a->path = strdup(path);
+ if (!a->path) {
+ free(a);
+ return -ENOMEM;
+ }
+
+ LIST_PREPEND(device_bandwidths, c->blockio_device_bandwidths, a);
+ }
+
+ a->bandwidth = u64;
+ }
+
+ n++;
+ }
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_exit_container(message);
+ if (r < 0)
+ return r;
+
+ if (mode != UNIT_CHECK) {
+ CGroupBlockIODeviceBandwidth *a, *next;
+ _cleanup_free_ char *buf = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ size_t size = 0;
+
+ if (n == 0) {
+ LIST_FOREACH_SAFE(device_bandwidths, a, next, c->blockio_device_bandwidths)
+ if (a->read == read)
+ cgroup_context_free_blockio_device_bandwidth(c, a);
+ }
+
+ unit_invalidate_cgroup(u, CGROUP_MASK_BLKIO);
+
+ f = open_memstream(&buf, &size);
+ if (!f)
+ return -ENOMEM;
+
+ if (read) {
+ fputs("BlockIOReadBandwidth=\n", f);
+ LIST_FOREACH(device_bandwidths, a, c->blockio_device_bandwidths)
+ if (a->read)
+ fprintf(f, "BlockIOReadBandwidth=%s %" PRIu64 "\n", a->path, a->bandwidth);
+ } else {
+ fputs("BlockIOWriteBandwidth=\n", f);
+ LIST_FOREACH(device_bandwidths, a, c->blockio_device_bandwidths)
+ if (!a->read)
+ fprintf(f, "BlockIOWriteBandwidth=%s %" PRIu64 "\n", a->path, a->bandwidth);
+ }
+
+ r = fflush_and_check(f);
+ if (r < 0)
+ return r;
+ unit_write_drop_in_private(u, mode, name, buf);
+ }
+
+ return 1;
+
+ } else if (streq(name, "BlockIODeviceWeight")) {
+ const char *path;
+ uint64_t weight;
+ unsigned n = 0;
+
+ r = sd_bus_message_enter_container(message, 'a', "(st)");
+ if (r < 0)
+ return r;
+
+ while ((r = sd_bus_message_read(message, "(st)", &path, &weight)) > 0) {
+
+ if (!CGROUP_BLKIO_WEIGHT_IS_OK(weight) || weight == CGROUP_BLKIO_WEIGHT_INVALID)
+ return sd_bus_error_set_errnof(error, EINVAL, "BlockIODeviceWeight out of range");
+
+ if (mode != UNIT_CHECK) {
+ CGroupBlockIODeviceWeight *a = NULL, *b;
+
+ LIST_FOREACH(device_weights, b, c->blockio_device_weights) {
+ if (path_equal(b->path, path)) {
+ a = b;
+ break;
+ }
+ }
+
+ if (!a) {
+ a = new0(CGroupBlockIODeviceWeight, 1);
+ if (!a)
+ return -ENOMEM;
+
+ a->path = strdup(path);
+ if (!a->path) {
+ free(a);
+ return -ENOMEM;
+ }
+ LIST_PREPEND(device_weights,c->blockio_device_weights, a);
+ }
+
+ a->weight = weight;
+ }
+
+ n++;
+ }
+
+ r = sd_bus_message_exit_container(message);
+ if (r < 0)
+ return r;
+
+ if (mode != UNIT_CHECK) {
+ _cleanup_free_ char *buf = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ CGroupBlockIODeviceWeight *a;
+ size_t size = 0;
+
+ if (n == 0) {
+ while (c->blockio_device_weights)
+ cgroup_context_free_blockio_device_weight(c, c->blockio_device_weights);
+ }
+
+ unit_invalidate_cgroup(u, CGROUP_MASK_BLKIO);
+
+ f = open_memstream(&buf, &size);
+ if (!f)
+ return -ENOMEM;
+
+ fputs("BlockIODeviceWeight=\n", f);
+ LIST_FOREACH(device_weights, a, c->blockio_device_weights)
+ fprintf(f, "BlockIODeviceWeight=%s %" PRIu64 "\n", a->path, a->weight);
+
+ r = fflush_and_check(f);
+ if (r < 0)
+ return r;
+ unit_write_drop_in_private(u, mode, name, buf);
+ }
+
+ return 1;
+
+ } else if (streq(name, "MemoryAccounting")) {
+ int b;
+
+ r = sd_bus_message_read(message, "b", &b);
+ if (r < 0)
+ return r;
+
+ if (mode != UNIT_CHECK) {
+ c->memory_accounting = b;
+ unit_invalidate_cgroup(u, CGROUP_MASK_MEMORY);
+ unit_write_drop_in_private(u, mode, name, b ? "MemoryAccounting=yes" : "MemoryAccounting=no");
+ }
+
+ return 1;
+
+ } else if (streq(name, "MemoryLimit")) {
+ uint64_t limit;
+
+ r = sd_bus_message_read(message, "t", &limit);
+ if (r < 0)
+ return r;
+
+ if (mode != UNIT_CHECK) {
+ c->memory_limit = limit;
+ unit_invalidate_cgroup(u, CGROUP_MASK_MEMORY);
+
+ if (limit == (uint64_t) -1)
+ unit_write_drop_in_private(u, mode, name, "MemoryLimit=infinity");
+ else
+ unit_write_drop_in_private_format(u, mode, name, "MemoryLimit=%" PRIu64, limit);
+ }
+
+ return 1;
+
+ } else if (streq(name, "DevicePolicy")) {
+ const char *policy;
+ CGroupDevicePolicy p;
+
+ r = sd_bus_message_read(message, "s", &policy);
+ if (r < 0)
+ return r;
+
+ p = cgroup_device_policy_from_string(policy);
+ if (p < 0)
+ return -EINVAL;
+
+ if (mode != UNIT_CHECK) {
+ char *buf;
+
+ c->device_policy = p;
+ unit_invalidate_cgroup(u, CGROUP_MASK_DEVICES);
+
+ buf = strjoina("DevicePolicy=", policy);
+ unit_write_drop_in_private(u, mode, name, buf);
+ }
+
+ return 1;
+
+ } else if (streq(name, "DeviceAllow")) {
+ const char *path, *rwm;
+ unsigned n = 0;
+
+ r = sd_bus_message_enter_container(message, 'a', "(ss)");
+ if (r < 0)
+ return r;
+
+ while ((r = sd_bus_message_read(message, "(ss)", &path, &rwm)) > 0) {
+
+ if ((!startswith(path, "/dev/") &&
+ !startswith(path, "block-") &&
+ !startswith(path, "char-")) ||
+ strpbrk(path, WHITESPACE))
+ return sd_bus_error_set_errnof(error, EINVAL, "DeviceAllow= requires device node");
+
+ if (isempty(rwm))
+ rwm = "rwm";
+
+ if (!in_charset(rwm, "rwm"))
+ return sd_bus_error_set_errnof(error, EINVAL, "DeviceAllow= requires combination of rwm flags");
+
+ if (mode != UNIT_CHECK) {
+ CGroupDeviceAllow *a = NULL, *b;
+
+ LIST_FOREACH(device_allow, b, c->device_allow) {
+ if (path_equal(b->path, path)) {
+ a = b;
+ break;
+ }
+ }
+
+ if (!a) {
+ a = new0(CGroupDeviceAllow, 1);
+ if (!a)
+ return -ENOMEM;
+
+ a->path = strdup(path);
+ if (!a->path) {
+ free(a);
+ return -ENOMEM;
+ }
+
+ LIST_PREPEND(device_allow, c->device_allow, a);
+ }
+
+ a->r = !!strchr(rwm, 'r');
+ a->w = !!strchr(rwm, 'w');
+ a->m = !!strchr(rwm, 'm');
+ }
+
+ n++;
+ }
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_exit_container(message);
+ if (r < 0)
+ return r;
+
+ if (mode != UNIT_CHECK) {
+ _cleanup_free_ char *buf = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ CGroupDeviceAllow *a;
+ size_t size = 0;
+
+ if (n == 0) {
+ while (c->device_allow)
+ cgroup_context_free_device_allow(c, c->device_allow);
+ }
+
+ unit_invalidate_cgroup(u, CGROUP_MASK_DEVICES);
+
+ f = open_memstream(&buf, &size);
+ if (!f)
+ return -ENOMEM;
+
+ fputs("DeviceAllow=\n", f);
+ LIST_FOREACH(device_allow, a, c->device_allow)
+ fprintf(f, "DeviceAllow=%s %s%s%s\n", a->path, a->r ? "r" : "", a->w ? "w" : "", a->m ? "m" : "");
+
+ r = fflush_and_check(f);
+ if (r < 0)
+ return r;
+ unit_write_drop_in_private(u, mode, name, buf);
+ }
+
+ return 1;
+
+ } else if (streq(name, "TasksAccounting")) {
+ int b;
+
+ r = sd_bus_message_read(message, "b", &b);
+ if (r < 0)
+ return r;
+
+ if (mode != UNIT_CHECK) {
+ c->tasks_accounting = b;
+ unit_invalidate_cgroup(u, CGROUP_MASK_PIDS);
+ unit_write_drop_in_private(u, mode, name, b ? "TasksAccounting=yes" : "TasksAccounting=no");
+ }
+
+ return 1;
+
+ } else if (streq(name, "TasksMax")) {
+ uint64_t limit;
+
+ r = sd_bus_message_read(message, "t", &limit);
+ if (r < 0)
+ return r;
+
+ if (mode != UNIT_CHECK) {
+ c->tasks_max = limit;
+ unit_invalidate_cgroup(u, CGROUP_MASK_PIDS);
+
+ if (limit == (uint64_t) -1)
+ unit_write_drop_in_private(u, mode, name, "TasksMax=infinity");
+ else
+ unit_write_drop_in_private_format(u, mode, name, "TasksMax=%" PRIu64, limit);
+ }
+
+ return 1;
+ }
+
+ if (u->transient && u->load_state == UNIT_STUB) {
+ r = bus_cgroup_set_transient_property(u, c, name, message, mode, error);
+ if (r != 0)
+ return r;
+
+ }
+
+ return 0;
+}
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