src/core/dbus-swap.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7   Copyright 2010 Maarten Lankhorst
   8
   9   systemd is free software; you can redistribute it and/or modify it
  10   under the terms of the GNU Lesser General Public License as published by
  11   the Free Software Foundation; either version 2.1 of the License, or
  12   (at your option) any later version.
  13
  14   systemd is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   Lesser General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  21 ***/
  22
  23 #include <errno.h>
  24
  25 #include "dbus-unit.h"
  26 #include "dbus-execute.h"
  27 #include "dbus-kill.h"
  28 #include "dbus-cgroup.h"
  29 #include "dbus-common.h"
  30 #include "selinux-access.h"
  31 #include "dbus-swap.h"
  32
  33 #define BUS_SWAP_INTERFACE                                              \
  34         " <interface name=\"org.freedesktop.systemd1.Swap\">\n"         \
  35         "  <property name=\"What\" type=\"s\" access=\"read\"/>\n"      \
  36         "  <property name=\"Priority\" type=\"i\" access=\"read\"/>\n"  \
  37         "  <property name=\"TimeoutUSec\" type=\"t\" access=\"read\"/>\n" \
  38         BUS_EXEC_COMMAND_INTERFACE("ExecActivate")                      \
  39         BUS_EXEC_COMMAND_INTERFACE("ExecDeactivate")                    \
  40         BUS_EXEC_CONTEXT_INTERFACE                                      \
  41         BUS_KILL_CONTEXT_INTERFACE                                      \
  42         BUS_CGROUP_CONTEXT_INTERFACE                                    \
  43         "  <property name=\"ControlPID\" type=\"u\" access=\"read\"/>\n" \
  44         "  <property name=\"Result\" type=\"s\" access=\"read\"/>\n"    \
  45         " </interface>\n"
  46
  47 #define INTROSPECTION                                                   \
  48         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
  49         "<node>\n"                                                      \
  50         BUS_UNIT_INTERFACE                                              \
  51         BUS_SWAP_INTERFACE                                              \
  52         BUS_PROPERTIES_INTERFACE                                        \
  53         BUS_PEER_INTERFACE                                              \
  54         BUS_INTROSPECTABLE_INTERFACE                                    \
  55         "</node>\n"
  56
  57 #define INTERFACES_LIST                              \
  58         BUS_UNIT_INTERFACES_LIST                     \
  59         "org.freedesktop.systemd1.Swap\0"
  60
  61 const char bus_swap_interface[] _introspect_("Swap") = BUS_SWAP_INTERFACE;
  62
  63 const char bus_swap_invalidating_properties[] =
  64         "What\0"
  65         "Priority\0"
  66         "ExecActivate\0"
  67         "ExecDeactivate\0"
  68         "ControlPID\0"
  69         "Result\0";
  70
  71 static int bus_swap_append_priority(DBusMessageIter *i, const char *property, void *data) {
  72         Swap *s = data;
  73         dbus_int32_t j;
  74
  75         assert(i);
  76         assert(property);
  77         assert(s);
  78
  79         if (s->from_proc_swaps)
  80                 j = s->parameters_proc_swaps.priority;
  81         else if (s->from_fragment)
  82                 j = s->parameters_fragment.priority;
  83         else
  84                 j = -1;
  85
  86         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, &j))
  87                 return -ENOMEM;
  88
  89         return 0;
  90 }
  91
  92 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_swap_append_swap_result, swap_result, SwapResult);
  93
  94 static const BusProperty bus_swap_properties[] = {
  95         { "What",       bus_property_append_string, "s", offsetof(Swap, what),  true },
  96         { "Priority",   bus_swap_append_priority,   "i", 0 },
  97         BUS_EXEC_COMMAND_PROPERTY("ExecActivate",   offsetof(Swap, exec_command[SWAP_EXEC_ACTIVATE]),   false),
  98         BUS_EXEC_COMMAND_PROPERTY("ExecDeactivate", offsetof(Swap, exec_command[SWAP_EXEC_DEACTIVATE]), false),
  99         { "ControlPID", bus_property_append_pid,    "u", offsetof(Swap, control_pid) },
 100         { "Result",     bus_swap_append_swap_result,"s", offsetof(Swap, result)      },
 101         { NULL, }
 102 };
 103
 104 DBusHandlerResult bus_swap_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
 105         Swap *s = SWAP(u);
 106         const BusBoundProperties bps[] = {
 107                 { "org.freedesktop.systemd1.Unit", bus_unit_properties,           u },
 108                 { "org.freedesktop.systemd1.Swap", bus_swap_properties,           s },
 109                 { "org.freedesktop.systemd1.Swap", bus_exec_context_properties,   &s->exec_context },
 110                 { "org.freedesktop.systemd1.Swap", bus_kill_context_properties,   &s->kill_context },
 111                 { "org.freedesktop.systemd1.Swap", bus_cgroup_context_properties, &s->cgroup_context },
 112                 { NULL, }
 113         };
 114
 115         SELINUX_UNIT_ACCESS_CHECK(u, c, message, "status");
 116
 117         return bus_default_message_handler(c, message, INTROSPECTION, INTERFACES_LIST, bps);
 118 }
 119
 120 int bus_swap_set_property(
 121                 Unit *u,
 122                 const char *name,
 123                 DBusMessageIter *i,
 124                 UnitSetPropertiesMode mode,
 125                 DBusError *error) {
 126
 127         Swap *s = SWAP(u);
 128         int r;
 129
 130         assert(name);
 131         assert(u);
 132         assert(i);
 133
 134         r = bus_cgroup_set_property(u, &s->cgroup_context, name, i, mode, error);
 135         if (r != 0)
 136                 return r;
 137
 138         return 0;
 139 }
 140
 141 int bus_swap_commit_properties(Unit *u) {
 142         assert(u);
 143
 144         unit_realize_cgroup(u);
 145         return 0;
 146 }