/*-*- 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 <http://www.gnu.org/licenses/>. ***/ #include "bus-util.h" #include "path-util.h" #include "cgroup-util.h" #include "cgroup.h" #include "dbus-cgroup.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, sd_bus_error *error, void *userdata) { 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, sd_bus_error *error, void *userdata) { 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, sd_bus_error *error, void *userdata) { 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("CPUAccounting", "b", bus_property_get_bool, offsetof(CGroupContext, cpu_accounting), 0), SD_BUS_PROPERTY("CPUShares", "t", bus_property_get_ulong, offsetof(CGroupContext, cpu_shares), 0), SD_BUS_PROPERTY("BlockIOAccounting", "b", bus_property_get_bool, offsetof(CGroupContext, blockio_accounting), 0), SD_BUS_PROPERTY("BlockIOWeight", "t", bus_property_get_ulong, offsetof(CGroupContext, 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_VTABLE_END }; 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_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; r = sd_bus_message_read(message, "t", &u64); if (r < 0) return r; ul = (unsigned long) u64; if (ul <= 0 || (uint64_t) ul != u64) return sd_bus_error_set_errnof(error, EINVAL, "CPUShares value out of range"); 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")) { int b; r = sd_bus_message_read(message, "b", &b); if (r < 0) return r; if (mode != UNIT_CHECK) { 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; r = sd_bus_message_read(message, "t", &u64); if (r < 0) return r; ul = (unsigned long) u64; if (ul < 10 || ul > 1000) return sd_bus_error_set_errnof(error, EINVAL, "BlockIOWeight value out of range"); 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")) { 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; 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); } 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")) { const char *path; uint64_t u64; 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, &u64)) > 0) { unsigned long ul; ul = (unsigned long) u64; if (ul < 10 || ul > 1000) 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 = ul; } n++; } 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")) { int b; r = sd_bus_message_read(message, "b", &b); if (r < 0) return r; if (mode != UNIT_CHECK) { c->memory_accounting = b; 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_write_drop_in_private_format(u, mode, name, "%s=%" PRIu64, name, 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; buf = strappenda("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 (!path_startswith(path, "/dev")) 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 (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; }