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
  28 #define BUS_MOUNT_INTERFACE                                             \
  29         " <interface name=\"org.freedesktop.systemd1.Mount\">\n"        \
  30         "  <property name=\"Where\" type=\"s\" access=\"read\"/>\n"     \
  31         "  <property name=\"What\" type=\"s\" access=\"read\"/>\n"      \
  32         "  <property name=\"Options\" type=\"s\" access=\"read\"/>\n"   \
  33         "  <property name=\"Type\" type=\"s\" access=\"read\"/>\n"      \
  34         "  <property name=\"TimeoutUSec\" type=\"t\" access=\"read\"/>\n" \
  35         BUS_EXEC_COMMAND_INTERFACE("ExecMount")                         \
  36         BUS_EXEC_COMMAND_INTERFACE("ExecUnmount")                       \
  37         BUS_EXEC_COMMAND_INTERFACE("ExecRemount")                       \
  38         BUS_EXEC_CONTEXT_INTERFACE                                      \
  39         "  <property name=\"ControlPID\" type=\"u\" access=\"read\"/>\n" \
  40         "  <property name=\"DirectoryMode\" type=\"u\" access=\"read\"/>\n" \
  41         " </interface>\n"
  42
  43 #define INTROSPECTION                                                   \
  44         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
  45         "<node>\n"                                                      \
  46         BUS_UNIT_INTERFACE                                              \
  47         BUS_MOUNT_INTERFACE                                             \
  48         BUS_PROPERTIES_INTERFACE                                        \
  49         BUS_PEER_INTERFACE                                              \
  50         BUS_INTROSPECTABLE_INTERFACE                                    \
  51         "</node>\n"
  52
  53 const char bus_mount_interface[] = BUS_MOUNT_INTERFACE;
  54
  55 const char bus_mount_invalidating_properties[] =
  56         "What\0"
  57         "Options\0"
  58         "Type\0"
  59         "ExecMount\0"
  60         "ExecUnmount\0"
  61         "ExecRemount\0"
  62         "ControlPID\0"
  63         "\0";
  64
  65 static int bus_mount_append_what(Manager *n, DBusMessageIter *i, const char *property, void *data) {
  66         Mount *m = data;
  67         const char *d;
  68
  69         assert(n);
  70         assert(i);
  71         assert(property);
  72         assert(m);
  73
  74         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
  75                 d = m->parameters_proc_self_mountinfo.what;
  76         else if (m->from_fragment && m->parameters_fragment.what)
  77                 d = m->parameters_fragment.what;
  78         else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
  79                 d = m->parameters_etc_fstab.what;
  80         else
  81                 d = "";
  82
  83         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
  84                 return -ENOMEM;
  85
  86         return 0;
  87 }
  88
  89 static int bus_mount_append_options(Manager *n, DBusMessageIter *i, const char *property, void *data) {
  90         Mount *m = data;
  91         const char *d;
  92
  93         assert(n);
  94         assert(i);
  95         assert(property);
  96         assert(m);
  97
  98         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.options)
  99                 d = m->parameters_proc_self_mountinfo.options;
 100         else if (m->from_fragment && m->parameters_fragment.options)
 101                 d = m->parameters_fragment.options;
 102         else if (m->from_etc_fstab && m->parameters_etc_fstab.options)
 103                 d = m->parameters_etc_fstab.options;
 104         else
 105                 d = "";
 106
 107         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
 108                 return -ENOMEM;
 109
 110         return 0;
 111 }
 112
 113 static int bus_mount_append_type(Manager *n, DBusMessageIter *i, const char *property, void *data) {
 114         Mount *m = data;
 115         const char *d;
 116
 117         assert(n);
 118         assert(i);
 119         assert(property);
 120         assert(m);
 121
 122         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.fstype)
 123                 d = m->parameters_proc_self_mountinfo.fstype;
 124         else if (m->from_fragment && m->parameters_fragment.fstype)
 125                 d = m->parameters_fragment.fstype;
 126         else if (m->from_etc_fstab && m->parameters_etc_fstab.fstype)
 127                 d = m->parameters_etc_fstab.fstype;
 128         else
 129                 d = "";
 130
 131         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
 132                 return -ENOMEM;
 133
 134         return 0;
 135 }
 136
 137 DBusHandlerResult bus_mount_message_handler(Unit *u, DBusConnection *c, DBusMessage *message) {
 138         const BusProperty properties[] = {
 139                 BUS_UNIT_PROPERTIES,
 140                 { "org.freedesktop.systemd1.Mount", "Where",         bus_property_append_string, "s", u->mount.where         },
 141                 { "org.freedesktop.systemd1.Mount", "What",          bus_mount_append_what,      "s", u                      },
 142                 { "org.freedesktop.systemd1.Mount", "Options",       bus_mount_append_options,   "s", u                      },
 143                 { "org.freedesktop.systemd1.Mount", "Type",          bus_mount_append_type,      "s", u                      },
 144                 { "org.freedesktop.systemd1.Mount", "TimeoutUSec",   bus_property_append_usec,   "t", &u->mount.timeout_usec },
 145                 BUS_EXEC_COMMAND_PROPERTY("org.freedesktop.systemd1.Mount", u->mount.exec_command+MOUNT_EXEC_MOUNT,   "ExecMount"),
 146                 BUS_EXEC_COMMAND_PROPERTY("org.freedesktop.systemd1.Mount", u->mount.exec_command+MOUNT_EXEC_UNMOUNT, "ExecUnmount"),
 147                 BUS_EXEC_COMMAND_PROPERTY("org.freedesktop.systemd1.Mount", u->mount.exec_command+MOUNT_EXEC_REMOUNT, "ExecRemount"),
 148                 BUS_EXEC_CONTEXT_PROPERTIES("org.freedesktop.systemd1.Mount", u->mount.exec_context),
 149                 { "org.freedesktop.systemd1.Mount", "ControlPID",    bus_property_append_pid,    "u", &u->mount.control_pid  },
 150                 { "org.freedesktop.systemd1.Mount", "DirectoryMode", bus_property_append_mode,   "u", &u->mount.directory_mode },
 151                 { NULL, NULL, NULL, NULL, NULL }
 152         };
 153
 154         return bus_default_message_handler(u->meta.manager, c, message, INTROSPECTION, properties);
 155 }