/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
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 .
***/
#include
#include "path-util.h"
#include "dbus-cgroup.h"
static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_cgroup_append_device_policy, cgroup_device_policy, CGroupDevicePolicy);
static int bus_cgroup_append_device_weights(DBusMessageIter *i, const char *property, void *data) {
DBusMessageIter sub, sub2;
CGroupContext *c = data;
CGroupBlockIODeviceWeight *w;
assert(i);
assert(property);
assert(c);
if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(st)", &sub))
return -ENOMEM;
LIST_FOREACH(device_weights, w, c->blockio_device_weights) {
if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &w->path) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &w->weight) ||
!dbus_message_iter_close_container(&sub, &sub2))
return -ENOMEM;
}
if (!dbus_message_iter_close_container(i, &sub))
return -ENOMEM;
return 0;
}
static int bus_cgroup_append_device_bandwidths(DBusMessageIter *i, const char *property, void *data) {
DBusMessageIter sub, sub2;
CGroupContext *c = data;
CGroupBlockIODeviceBandwidth *b;
assert(i);
assert(property);
assert(c);
if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(st)", &sub))
return -ENOMEM;
LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths) {
if (streq(property, "BlockIOReadBandwidth") != b->read)
continue;
if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &b->path) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &b->bandwidth) ||
!dbus_message_iter_close_container(&sub, &sub2))
return -ENOMEM;
}
if (!dbus_message_iter_close_container(i, &sub))
return -ENOMEM;
return 0;
}
static int bus_cgroup_append_device_allow(DBusMessageIter *i, const char *property, void *data) {
DBusMessageIter sub, sub2;
CGroupContext *c = data;
CGroupDeviceAllow *a;
assert(i);
assert(property);
assert(c);
if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(ss)", &sub))
return -ENOMEM;
LIST_FOREACH(device_allow, a, c->device_allow) {
const char *rwm;
char buf[4];
unsigned k = 0;
if (a->r)
buf[k++] = 'r';
if (a->w)
buf[k++] = 'w';
if (a->m)
buf[k++] = 'm';
buf[k] = 0;
rwm = buf;
if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &a->path) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &rwm) ||
!dbus_message_iter_close_container(&sub, &sub2))
return -ENOMEM;
}
if (!dbus_message_iter_close_container(i, &sub))
return -ENOMEM;
return 0;
}
const BusProperty bus_cgroup_context_properties[] = {
{ "CPUAccounting", bus_property_append_bool, "b", offsetof(CGroupContext, cpu_accounting) },
{ "CPUShares", bus_property_append_ul, "t", offsetof(CGroupContext, cpu_shares) },
{ "BlockIOAccounting", bus_property_append_bool, "b", offsetof(CGroupContext, blockio_accounting) },
{ "BlockIOWeight", bus_property_append_ul, "t", offsetof(CGroupContext, blockio_weight) },
{ "BlockIODeviceWeight", bus_cgroup_append_device_weights, "a(st)", 0 },
{ "BlockIOReadBandwidth", bus_cgroup_append_device_bandwidths, "a(st)", 0 },
{ "BlockIOWriteBandwidth", bus_cgroup_append_device_bandwidths, "a(st)", 0 },
{ "MemoryAccounting", bus_property_append_bool, "b", offsetof(CGroupContext, memory_accounting) },
{ "MemoryLimit", bus_property_append_uint64, "t", offsetof(CGroupContext, memory_limit) },
{ "DevicePolicy", bus_cgroup_append_device_policy, "s", offsetof(CGroupContext, device_policy) },
{ "DeviceAllow", bus_cgroup_append_device_allow, "a(ss)", 0 },
{}
};
int bus_cgroup_set_property(
Unit *u,
CGroupContext *c,
const char *name,
DBusMessageIter *i,
UnitSetPropertiesMode mode,
DBusError *error) {
assert(name);
assert(u);
assert(c);
assert(i);
if (streq(name, "CPUAccounting")) {
if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_BOOLEAN)
return -EINVAL;
if (mode != UNIT_CHECK) {
dbus_bool_t b;
dbus_message_iter_get_basic(i, &b);
c->cpu_accounting = b;
unit_write_drop_in_private(u, mode, name, b ? "CPUAccounting=yes" : "CPUAccounting=no");
}
return 1;
} else if (streq(name, "CPUShares")) {
uint64_t u64;
unsigned long ul;
if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_UINT64)
return -EINVAL;
dbus_message_iter_get_basic(i, &u64);
ul = (unsigned long) u64;
if (u64 <= 0 || u64 != (uint64_t) ul)
return -EINVAL;
if (mode != UNIT_CHECK) {
c->cpu_shares = ul;
unit_write_drop_in_private_format(u, mode, name, "CPUShares=%lu", ul);
}
return 1;
} else if (streq(name, "BlockIOAccounting")) {
if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_BOOLEAN)
return -EINVAL;
if (mode != UNIT_CHECK) {
dbus_bool_t b;
dbus_message_iter_get_basic(i, &b);
c->blockio_accounting = b;
unit_write_drop_in_private(u, mode, name, b ? "BlockIOAccounting=yes" : "BlockIOAccounting=no");
}
return 1;
} else if (streq(name, "BlockIOWeight")) {
uint64_t u64;
unsigned long ul;
if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_UINT64)
return -EINVAL;
dbus_message_iter_get_basic(i, &u64);
ul = (unsigned long) u64;
if (u64 < 10 || u64 > 1000)
return -EINVAL;
if (mode != UNIT_CHECK) {
c->blockio_weight = ul;
unit_write_drop_in_private_format(u, mode, name, "BlockIOWeight=%lu", ul);
}
return 1;
} else if (streq(name, "BlockIOReadBandwidth") || streq(name, "BlockIOWriteBandwidth")) {
DBusMessageIter sub;
unsigned n = 0;
bool read = true;
if (streq(name, "BlockIOWriteBandwidth"))
read = false;
if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_ARRAY ||
dbus_message_iter_get_element_type(i) != DBUS_TYPE_STRUCT)
return -EINVAL;
dbus_message_iter_recurse(i, &sub);
while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
DBusMessageIter sub2;
const char *path;
uint64_t u64;
dbus_message_iter_recurse(&sub, &sub2);
if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &u64, false) < 0)
return -EINVAL;
if (mode != UNIT_CHECK) {
CGroupBlockIODeviceBandwidth *a = NULL;
CGroupBlockIODeviceBandwidth *b;
bool exist = false;
LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths) {
if (path_equal(path, b->path) && read == b->read) {
a = b;
exist = true;
break;
}
}
if (!exist) {
a = new0(CGroupBlockIODeviceBandwidth, 1);
if (!a)
return -ENOMEM;
a->read = read;
a->path = strdup(path);
if (!a->path) {
free(a);
return -ENOMEM;
}
}
a->bandwidth = u64;
if (!exist)
LIST_PREPEND(device_bandwidths, c->blockio_device_bandwidths, a);
}
n++;
dbus_message_iter_next(&sub);
}
if (mode != UNIT_CHECK) {
_cleanup_free_ char *buf = NULL;
_cleanup_fclose_ FILE *f = NULL;
CGroupBlockIODeviceBandwidth *a;
CGroupBlockIODeviceBandwidth *next;
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);
}
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);
}
fflush(f);
unit_write_drop_in_private(u, mode, name, buf);
}
return 1;
} else if (streq(name, "BlockIODeviceWeight")) {
DBusMessageIter sub;
unsigned n = 0;
if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_ARRAY ||
dbus_message_iter_get_element_type(i) != DBUS_TYPE_STRUCT)
return -EINVAL;
dbus_message_iter_recurse(i, &sub);
while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
DBusMessageIter sub2;
const char *path;
uint64_t u64;
unsigned long ul;
dbus_message_iter_recurse(&sub, &sub2);
if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &u64, false) < 0)
return -EINVAL;
ul = (unsigned long) u64;
if (ul < 10 || ul > 1000)
return -EINVAL;
if (mode != UNIT_CHECK) {
CGroupBlockIODeviceWeight *a = NULL;
CGroupBlockIODeviceWeight *b;
bool exist = false;
LIST_FOREACH(device_weights, b, c->blockio_device_weights) {
if (path_equal(b->path, path)) {
a = b;
exist = true;
break;
}
}
if (!exist) {
a = new0(CGroupBlockIODeviceWeight, 1);
if (!a)
return -ENOMEM;
a->path = strdup(path);
if (!a->path) {
free(a);
return -ENOMEM;
}
}
a->weight = ul;
if (!exist)
LIST_PREPEND(device_weights,c->blockio_device_weights, a);
}
n++;
dbus_message_iter_next(&sub);
}
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);
}
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 %lu\n", a->path, a->weight);
fflush(f);
unit_write_drop_in_private(u, mode, name, buf);
}
return 1;
} else if (streq(name, "MemoryAccounting")) {
if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_BOOLEAN)
return -EINVAL;
if (mode != UNIT_CHECK) {
dbus_bool_t b;
dbus_message_iter_get_basic(i, &b);
c->memory_accounting = b;
unit_write_drop_in_private(u, mode, name, b ? "MemoryAccounting=yes" : "MemoryAccounting=no");
}
return 1;
} else if (streq(name, "MemoryLimit")) {
if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_UINT64)
return -EINVAL;
if (mode != UNIT_CHECK) {
uint64_t limit;
dbus_message_iter_get_basic(i, &limit);
c->memory_limit = limit;
unit_write_drop_in_private_format(u, mode, name, "%s=%" PRIu64, name, limit);
}
return 1;
} else if (streq(name, "DevicePolicy")) {
const char *policy;
CGroupDevicePolicy p;
if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_STRING)
return -EINVAL;
dbus_message_iter_get_basic(i, &policy);
p = cgroup_device_policy_from_string(policy);
if (p < 0)
return -EINVAL;
if (mode != UNIT_CHECK) {
char *buf;
c->device_policy = p;
buf = strappenda("DevicePolicy=", policy);
unit_write_drop_in_private(u, mode, name, buf);
}
return 1;
} else if (streq(name, "DeviceAllow")) {
DBusMessageIter sub;
unsigned n = 0;
if (dbus_message_iter_get_arg_type(i) != DBUS_TYPE_ARRAY ||
dbus_message_iter_get_element_type(i) != DBUS_TYPE_STRUCT)
return -EINVAL;
dbus_message_iter_recurse(i, &sub);
while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
DBusMessageIter sub2;
const char *path, *rwm;
dbus_message_iter_recurse(&sub, &sub2);
if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0 ||
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &rwm, false) < 0)
return -EINVAL;
if (!path_startswith(path, "/dev")) {
dbus_set_error(error, DBUS_ERROR_INVALID_ARGS, "DeviceAllow= requires device node");
return -EINVAL;
}
if (isempty(rwm))
rwm = "rwm";
if (!in_charset(rwm, "rwm")) {
dbus_set_error(error, DBUS_ERROR_INVALID_ARGS, "DeviceAllow= requires combination of rwm flags");
return -EINVAL;
}
if (mode != UNIT_CHECK) {
CGroupDeviceAllow *a = NULL;
CGroupDeviceAllow *b;
bool exist = false;
LIST_FOREACH(device_allow, b, c->device_allow) {
if (path_equal(b->path, path)) {
a = b;
exist = true;
break;
}
}
if (!exist) {
a = new0(CGroupDeviceAllow, 1);
if (!a)
return -ENOMEM;
a->path = strdup(path);
if (!a->path) {
free(a);
return -ENOMEM;
}
}
a->r = !!strchr(rwm, 'r');
a->w = !!strchr(rwm, 'w');
a->m = !!strchr(rwm, 'm');
if (!exist)
LIST_PREPEND(device_allow, c->device_allow, a);
}
n++;
dbus_message_iter_next(&sub);
}
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);
}
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" : "");
fflush(f);
unit_write_drop_in_private(u, mode, name, buf);
}
return 1;
}
return 0;
}