#include <dbus/dbus.h>

#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) },

{ "MemorySoftLimit", bus_property_append_uint64, "t", offsetof(CGroupContext, memory_soft_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->cpu_shares = ul;

unit_write_drop_in_private_format(u, mode, name, "BlockIOWeight=%lu", ul);

}

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") || streq(name, "MemorySoftLimit")) {

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);

if (streq(name, "MemoryLimit"))

c->memory_limit = limit;

else

c->memory_soft_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;

CGroupDeviceAllow *a;

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) {

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');

LIST_PREPEND(CGroupDeviceAllow, 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;

}