| /*-*- 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, |
| 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("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; |
| |
| 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); |
| } |
| |
| 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 = 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++; |
| } |
| |
| 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); |
| } |
| |
| 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 ((!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); |
| } |
| |
| 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; |
| } |