src/core/dbus-mount.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2010 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include "bus-util.h"
  21 #include "dbus-cgroup.h"
  22 #include "dbus-execute.h"
  23 #include "dbus-kill.h"
  24 #include "dbus-mount.h"
  25 #include "mount.h"
  26 #include "string-util.h"
  27 #include "unit.h"
  28
  29 static int property_get_what(
  30                 sd_bus *bus,
  31                 const char *path,
  32                 const char *interface,
  33                 const char *property,
  34                 sd_bus_message *reply,
  35                 void *userdata,
  36                 sd_bus_error *error) {
  37
  38         Mount *m = userdata;
  39         const char *d;
  40
  41         assert(bus);
  42         assert(reply);
  43         assert(m);
  44
  45         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
  46                 d = m->parameters_proc_self_mountinfo.what;
  47         else if (m->from_fragment && m->parameters_fragment.what)
  48                 d = m->parameters_fragment.what;
  49         else
  50                 d = "";
  51
  52         return sd_bus_message_append(reply, "s", d);
  53 }
  54
  55 static int property_get_options(
  56                 sd_bus *bus,
  57                 const char *path,
  58                 const char *interface,
  59                 const char *property,
  60                 sd_bus_message *reply,
  61                 void *userdata,
  62                 sd_bus_error *error) {
  63
  64         Mount *m = userdata;
  65         const char *d;
  66
  67         assert(bus);
  68         assert(reply);
  69         assert(m);
  70
  71         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.options)
  72                 d = m->parameters_proc_self_mountinfo.options;
  73         else if (m->from_fragment && m->parameters_fragment.options)
  74                 d = m->parameters_fragment.options;
  75         else
  76                 d = "";
  77
  78         return sd_bus_message_append(reply, "s", d);
  79 }
  80
  81 static int property_get_type(
  82                 sd_bus *bus,
  83                 const char *path,
  84                 const char *interface,
  85                 const char *property,
  86                 sd_bus_message *reply,
  87                 void *userdata,
  88                 sd_bus_error *error) {
  89
  90         const char *fstype = NULL;
  91         Mount *m = userdata;
  92
  93         assert(bus);
  94         assert(reply);
  95         assert(m);
  96
  97         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.fstype)
  98                 fstype = m->parameters_proc_self_mountinfo.fstype;
  99         else if (m->from_fragment && m->parameters_fragment.fstype)
 100                 fstype = m->parameters_fragment.fstype;
 101
 102         return sd_bus_message_append(reply, "s", fstype);
 103 }
 104
 105 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, mount_result, MountResult);
 106
 107 const sd_bus_vtable bus_mount_vtable[] = {
 108         SD_BUS_VTABLE_START(0),
 109         SD_BUS_PROPERTY("Where", "s", NULL, offsetof(Mount, where), SD_BUS_VTABLE_PROPERTY_CONST),
 110         SD_BUS_PROPERTY("What", "s", property_get_what, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 111         SD_BUS_PROPERTY("Options","s", property_get_options, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 112         SD_BUS_PROPERTY("Type", "s", property_get_type, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 113         SD_BUS_PROPERTY("TimeoutUSec", "t", bus_property_get_usec, offsetof(Mount, timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
 114         SD_BUS_PROPERTY("ControlPID", "u", bus_property_get_pid, offsetof(Mount, control_pid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 115         SD_BUS_PROPERTY("DirectoryMode", "u", bus_property_get_mode, offsetof(Mount, directory_mode), SD_BUS_VTABLE_PROPERTY_CONST),
 116         SD_BUS_PROPERTY("SloppyOptions", "b", bus_property_get_bool, offsetof(Mount, sloppy_options), SD_BUS_VTABLE_PROPERTY_CONST),
 117         SD_BUS_PROPERTY("LazyUnmount", "b", bus_property_get_bool, offsetof(Mount, lazy_unmount), SD_BUS_VTABLE_PROPERTY_CONST),
 118         SD_BUS_PROPERTY("ForceUnmount", "b", bus_property_get_bool, offsetof(Mount, force_unmount), SD_BUS_VTABLE_PROPERTY_CONST),
 119         SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Mount, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 120         SD_BUS_PROPERTY("UID", "u", NULL, offsetof(Unit, ref_uid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 121         SD_BUS_PROPERTY("GID", "u", NULL, offsetof(Unit, ref_gid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 122         BUS_EXEC_COMMAND_VTABLE("ExecMount", offsetof(Mount, exec_command[MOUNT_EXEC_MOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 123         BUS_EXEC_COMMAND_VTABLE("ExecUnmount", offsetof(Mount, exec_command[MOUNT_EXEC_UNMOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 124         BUS_EXEC_COMMAND_VTABLE("ExecRemount", offsetof(Mount, exec_command[MOUNT_EXEC_REMOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 125         SD_BUS_VTABLE_END
 126 };
 127
 128 static int bus_mount_set_transient_property(
 129                 Mount *m,
 130                 const char *name,
 131                 sd_bus_message *message,
 132                 UnitSetPropertiesMode mode,
 133                 sd_bus_error *error) {
 134
 135         const char *new_property;
 136         char **property;
 137         char *p;
 138         int r;
 139
 140         assert(m);
 141         assert(name);
 142         assert(message);
 143
 144         if (streq(name, "What"))
 145                 property = &m->parameters_fragment.what;
 146         else if (streq(name, "Options"))
 147                 property = &m->parameters_fragment.options;
 148         else if (streq(name, "Type"))
 149                 property = &m->parameters_fragment.fstype;
 150         else
 151                 return 0;
 152
 153         r = sd_bus_message_read(message, "s", &new_property);
 154         if (r < 0)
 155                 return r;
 156
 157         if (mode != UNIT_CHECK) {
 158                 p = strdup(new_property);
 159                 if (!p)
 160                         return -ENOMEM;
 161
 162                 unit_write_drop_in_format(UNIT(m), mode, name, "[Mount]\n%s=%s\n",
 163                         name, new_property);
 164
 165                 free(*property);
 166                 *property = p;
 167         }
 168
 169         return 1;
 170 }
 171
 172 int bus_mount_set_property(
 173                 Unit *u,
 174                 const char *name,
 175                 sd_bus_message *message,
 176                 UnitSetPropertiesMode mode,
 177                 sd_bus_error *error) {
 178
 179         Mount *m = MOUNT(u);
 180         int r;
 181
 182         assert(m);
 183         assert(name);
 184         assert(message);
 185
 186         r = bus_cgroup_set_property(u, &m->cgroup_context, name, message, mode, error);
 187         if (r != 0)
 188                 return r;
 189
 190         if (u->transient && u->load_state == UNIT_STUB) {
 191                 /* This is a transient unit, let's load a little more */
 192
 193                 r = bus_mount_set_transient_property(m, name, message, mode, error);
 194                 if (r != 0)
 195                         return r;
 196
 197                 r = bus_exec_context_set_transient_property(u, &m->exec_context, name, message, mode, error);
 198                 if (r != 0)
 199                         return r;
 200
 201                 r = bus_kill_context_set_transient_property(u, &m->kill_context, name, message, mode, error);
 202                 if (r != 0)
 203                         return r;
 204         }
 205
 206         return 0;
 207 }
 208
 209 int bus_mount_commit_properties(Unit *u) {
 210         assert(u);
 211
 212         unit_update_cgroup_members_masks(u);
 213         unit_realize_cgroup(u);
 214
 215         return 0;
 216 }