src/dbus-mount.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
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 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   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23
  24 #include "dbus-unit.h"
  25 #include "dbus-mount.h"
  26 #include "dbus-execute.h"
  27 #include "dbus-common.h"
  28
  29 #define BUS_MOUNT_INTERFACE                                             \
  30         " <interface name=\"org.freedesktop.systemd1.Mount\">\n"        \
  31         "  <property name=\"Where\" type=\"s\" access=\"read\"/>\n"     \
  32         "  <property name=\"What\" type=\"s\" access=\"read\"/>\n"      \
  33         "  <property name=\"Options\" type=\"s\" access=\"read\"/>\n"   \
  34         "  <property name=\"Type\" type=\"s\" access=\"read\"/>\n"      \
  35         "  <property name=\"TimeoutUSec\" type=\"t\" access=\"read\"/>\n" \
  36         BUS_EXEC_COMMAND_INTERFACE("ExecMount")                         \
  37         BUS_EXEC_COMMAND_INTERFACE("ExecUnmount")                       \
  38         BUS_EXEC_COMMAND_INTERFACE("ExecRemount")                       \
  39         BUS_EXEC_CONTEXT_INTERFACE                                      \
  40         "  <property name=\"ControlPID\" type=\"u\" access=\"read\"/>\n" \
  41         "  <property name=\"DirectoryMode\" type=\"u\" access=\"read\"/>\n" \
  42         " </interface>\n"
  43
  44 #define INTROSPECTION                                                   \
  45         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
  46         "<node>\n"                                                      \
  47         BUS_UNIT_INTERFACE                                              \
  48         BUS_MOUNT_INTERFACE                                             \
  49         BUS_PROPERTIES_INTERFACE                                        \
  50         BUS_PEER_INTERFACE                                              \
  51         BUS_INTROSPECTABLE_INTERFACE                                    \
  52         "</node>\n"
  53
  54 #define INTERFACES_LIST                              \
  55         BUS_UNIT_INTERFACES_LIST                     \
  56         "org.freedesktop.systemd1.Mount\0"
  57
  58 const char bus_mount_interface[] _introspect_("Mount") = BUS_MOUNT_INTERFACE;
  59
  60 const char bus_mount_invalidating_properties[] =
  61         "What\0"
  62         "Options\0"
  63         "Type\0"
  64         "ExecMount\0"
  65         "ExecUnmount\0"
  66         "ExecRemount\0"
  67         "ControlPID\0";
  68
  69 static int bus_mount_append_what(DBusMessageIter *i, const char *property, void *data) {
  70         Mount *m = data;
  71         const char *d;
  72
  73         assert(i);
  74         assert(property);
  75         assert(m);
  76
  77         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
  78                 d = m->parameters_proc_self_mountinfo.what;
  79         else if (m->from_fragment && m->parameters_fragment.what)
  80                 d = m->parameters_fragment.what;
  81         else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
  82                 d = m->parameters_etc_fstab.what;
  83         else
  84                 d = "";
  85
  86         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
  87                 return -ENOMEM;
  88
  89         return 0;
  90 }
  91
  92 static int bus_mount_append_options(DBusMessageIter *i, const char *property, void *data) {
  93         Mount *m = data;
  94         const char *d;
  95
  96         assert(i);
  97         assert(property);
  98         assert(m);
  99
 100         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.options)
 101                 d = m->parameters_proc_self_mountinfo.options;
 102         else if (m->from_fragment && m->parameters_fragment.options)
 103                 d = m->parameters_fragment.options;
 104         else if (m->from_etc_fstab && m->parameters_etc_fstab.options)
 105                 d = m->parameters_etc_fstab.options;
 106         else
 107                 d = "";
 108
 109         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
 110                 return -ENOMEM;
 111
 112         return 0;
 113 }
 114
 115 static int bus_mount_append_type(DBusMessageIter *i, const char *property, void *data) {
 116         Mount *m = data;
 117         const char *d;
 118
 119         assert(i);
 120         assert(property);
 121         assert(m);
 122
 123         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.fstype)
 124                 d = m->parameters_proc_self_mountinfo.fstype;
 125         else if (m->from_fragment && m->parameters_fragment.fstype)
 126                 d = m->parameters_fragment.fstype;
 127         else if (m->from_etc_fstab && m->parameters_etc_fstab.fstype)
 128                 d = m->parameters_etc_fstab.fstype;
 129         else
 130                 d = "";
 131
 132         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
 133                 return -ENOMEM;
 134
 135         return 0;
 136 }
 137
 138 DBusHandlerResult bus_mount_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
 139
 140         const BusProperty properties[] = {
 141                 BUS_UNIT_PROPERTIES,
 142                 { "org.freedesktop.systemd1.Mount", "Where",         bus_property_append_string, "s", u->mount.where           },
 143                 { "org.freedesktop.systemd1.Mount", "What",          bus_mount_append_what,      "s", u                        },
 144                 { "org.freedesktop.systemd1.Mount", "Options",       bus_mount_append_options,   "s", u                        },
 145                 { "org.freedesktop.systemd1.Mount", "Type",          bus_mount_append_type,      "s", u                        },
 146                 { "org.freedesktop.systemd1.Mount", "TimeoutUSec",   bus_property_append_usec,   "t", &u->mount.timeout_usec   },
 147                 BUS_EXEC_COMMAND_PROPERTY("org.freedesktop.systemd1.Mount", u->mount.exec_command+MOUNT_EXEC_MOUNT,   "ExecMount"),
 148                 BUS_EXEC_COMMAND_PROPERTY("org.freedesktop.systemd1.Mount", u->mount.exec_command+MOUNT_EXEC_UNMOUNT, "ExecUnmount"),
 149                 BUS_EXEC_COMMAND_PROPERTY("org.freedesktop.systemd1.Mount", u->mount.exec_command+MOUNT_EXEC_REMOUNT, "ExecRemount"),
 150                 BUS_EXEC_CONTEXT_PROPERTIES("org.freedesktop.systemd1.Mount", u->mount.exec_context),
 151                 { "org.freedesktop.systemd1.Mount", "ControlPID",    bus_property_append_pid,    "u", &u->mount.control_pid    },
 152                 { "org.freedesktop.systemd1.Mount", "DirectoryMode", bus_property_append_mode,   "u", &u->mount.directory_mode },
 153                 { NULL, NULL, NULL, NULL, NULL }
 154         };
 155
 156         return bus_default_message_handler(c, message, INTROSPECTION, INTERFACES_LIST, properties);
 157 }