src/core/dbus-cgroup.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2013 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <dbus/dbus.h>
  23
  24 #include "dbus-cgroup.h"
  25
  26 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_cgroup_append_device_policy, cgroup_device_policy, CGroupDevicePolicy);
  27
  28 static int bus_cgroup_append_device_weights(DBusMessageIter *i, const char *property, void *data) {
  29         DBusMessageIter sub, sub2;
  30         CGroupContext *c = data;
  31         CGroupBlockIODeviceWeight *w;
  32
  33         assert(i);
  34         assert(property);
  35         assert(c);
  36
  37         if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(st)", &sub))
  38                 return -ENOMEM;
  39
  40         LIST_FOREACH(device_weights, w, c->blockio_device_weights) {
  41
  42                 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) ||
  43                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &w->path) ||
  44                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &w->weight) ||
  45                     !dbus_message_iter_close_container(&sub, &sub2))
  46                         return -ENOMEM;
  47         }
  48
  49         if (!dbus_message_iter_close_container(i, &sub))
  50                 return -ENOMEM;
  51
  52         return 0;
  53 }
  54
  55 static int bus_cgroup_append_device_bandwidths(DBusMessageIter *i, const char *property, void *data) {
  56         DBusMessageIter sub, sub2;
  57         CGroupContext *c = data;
  58         CGroupBlockIODeviceBandwidth *b;
  59
  60         assert(i);
  61         assert(property);
  62         assert(c);
  63
  64         if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(st)", &sub))
  65                 return -ENOMEM;
  66
  67         LIST_FOREACH(device_bandwidths, b, c->blockio_device_bandwidths) {
  68
  69                 if (streq(property, "BlockIOReadBandwidth") != b->read)
  70                         continue;
  71
  72                 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) ||
  73                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &b->path) ||
  74                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &b->bandwidth) ||
  75                     !dbus_message_iter_close_container(&sub, &sub2))
  76                         return -ENOMEM;
  77         }
  78
  79         if (!dbus_message_iter_close_container(i, &sub))
  80                 return -ENOMEM;
  81
  82         return 0;
  83 }
  84
  85 static int bus_cgroup_append_device_allow(DBusMessageIter *i, const char *property, void *data) {
  86         DBusMessageIter sub, sub2;
  87         CGroupContext *c = data;
  88         CGroupDeviceAllow *a;
  89
  90         assert(i);
  91         assert(property);
  92         assert(c);
  93
  94         if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(ss)", &sub))
  95                 return -ENOMEM;
  96
  97         LIST_FOREACH(device_allow, a, c->device_allow) {
  98                 const char *rwm;
  99                 char buf[4];
 100                 unsigned k = 0;
 101
 102                 if (a->r)
 103                         buf[k++] = 'r';
 104                 if (a->w)
 105                         buf[k++] = 'w';
 106                 if (a->m)
 107                         buf[k++] = 'm';
 108
 109                 buf[k] = 0;
 110                 rwm = buf;
 111
 112                 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) ||
 113                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &a->path) ||
 114                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &rwm) ||
 115                     !dbus_message_iter_close_container(&sub, &sub2))
 116                         return -ENOMEM;
 117         }
 118
 119         if (!dbus_message_iter_close_container(i, &sub))
 120                 return -ENOMEM;
 121
 122         return 0;
 123 }
 124
 125 const BusProperty bus_cgroup_context_properties[] = {
 126         { "CPUAccounting",           bus_property_append_bool,            "b",     offsetof(CGroupContext, cpu_accounting)     },
 127         { "CPUShares",               bus_property_append_ul,              "t",     offsetof(CGroupContext, cpu_shares)         },
 128         { "BlockIOAccounting",       bus_property_append_bool,            "b",     offsetof(CGroupContext, blockio_accounting) },
 129         { "BlockIOWeight",           bus_property_append_ul,              "t",     offsetof(CGroupContext, blockio_weight)     },
 130         { "BlockIODeviceWeight",     bus_cgroup_append_device_weights,    "a(st)", 0                                           },
 131         { "BlockIOReadBandwidth",    bus_cgroup_append_device_bandwidths, "a(st)", 0                                           },
 132         { "BlockIOWriteBandwidth",   bus_cgroup_append_device_bandwidths, "a(st)", 0                                           },
 133         { "MemoryAccounting",        bus_property_append_bool,            "b",     offsetof(CGroupContext, memory_accounting)  },
 134         { "MemoryLimit",             bus_property_append_uint64,          "t",     offsetof(CGroupContext, memory_limit)       },
 135         { "MemorySoftLimit",         bus_property_append_uint64,          "t",     offsetof(CGroupContext, memory_soft_limit)  },
 136         { "DevicePolicy",            bus_cgroup_append_device_policy,     "s",     offsetof(CGroupContext, device_policy)      },
 137         { "DeviceAllow",             bus_cgroup_append_device_allow,      "a(ss)", 0                                           },
 138         {}
 139 };