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 = NULL;
  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
  50         return sd_bus_message_append(reply, "s", d);
  51 }
  52
  53 static int property_get_options(
  54                 sd_bus *bus,
  55                 const char *path,
  56                 const char *interface,
  57                 const char *property,
  58                 sd_bus_message *reply,
  59                 void *userdata,
  60                 sd_bus_error *error) {
  61
  62         Mount *m = userdata;
  63         const char *d = NULL;
  64
  65         assert(bus);
  66         assert(reply);
  67         assert(m);
  68
  69         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.options)
  70                 d = m->parameters_proc_self_mountinfo.options;
  71         else if (m->from_fragment && m->parameters_fragment.options)
  72                 d = m->parameters_fragment.options;
  73
  74         return sd_bus_message_append(reply, "s", d);
  75 }
  76
  77 static int property_get_type(
  78                 sd_bus *bus,
  79                 const char *path,
  80                 const char *interface,
  81                 const char *property,
  82                 sd_bus_message *reply,
  83                 void *userdata,
  84                 sd_bus_error *error) {
  85
  86         const char *fstype = NULL;
  87         Mount *m = userdata;
  88
  89         assert(bus);
  90         assert(reply);
  91         assert(m);
  92
  93         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.fstype)
  94                 fstype = m->parameters_proc_self_mountinfo.fstype;
  95         else if (m->from_fragment && m->parameters_fragment.fstype)
  96                 fstype = m->parameters_fragment.fstype;
  97
  98         return sd_bus_message_append(reply, "s", fstype);
  99 }
 100
 101 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, mount_result, MountResult);
 102
 103 const sd_bus_vtable bus_mount_vtable[] = {
 104         SD_BUS_VTABLE_START(0),
 105         SD_BUS_PROPERTY("Where", "s", NULL, offsetof(Mount, where), SD_BUS_VTABLE_PROPERTY_CONST),
 106         SD_BUS_PROPERTY("What", "s", property_get_what, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 107         SD_BUS_PROPERTY("Options","s", property_get_options, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 108         SD_BUS_PROPERTY("Type", "s", property_get_type, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 109         SD_BUS_PROPERTY("TimeoutUSec", "t", bus_property_get_usec, offsetof(Mount, timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
 110         SD_BUS_PROPERTY("ControlPID", "u", bus_property_get_pid, offsetof(Mount, control_pid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 111         SD_BUS_PROPERTY("DirectoryMode", "u", bus_property_get_mode, offsetof(Mount, directory_mode), SD_BUS_VTABLE_PROPERTY_CONST),
 112         SD_BUS_PROPERTY("SloppyOptions", "b", bus_property_get_bool, offsetof(Mount, sloppy_options), SD_BUS_VTABLE_PROPERTY_CONST),
 113         SD_BUS_PROPERTY("LazyUnmount", "b", bus_property_get_bool, offsetof(Mount, lazy_unmount), SD_BUS_VTABLE_PROPERTY_CONST),
 114         SD_BUS_PROPERTY("ForceUnmount", "b", bus_property_get_bool, offsetof(Mount, force_unmount), SD_BUS_VTABLE_PROPERTY_CONST),
 115         SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Mount, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 116         SD_BUS_PROPERTY("UID", "u", NULL, offsetof(Unit, ref_uid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 117         SD_BUS_PROPERTY("GID", "u", NULL, offsetof(Unit, ref_gid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 118         BUS_EXEC_COMMAND_VTABLE("ExecMount", offsetof(Mount, exec_command[MOUNT_EXEC_MOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 119         BUS_EXEC_COMMAND_VTABLE("ExecUnmount", offsetof(Mount, exec_command[MOUNT_EXEC_UNMOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 120         BUS_EXEC_COMMAND_VTABLE("ExecRemount", offsetof(Mount, exec_command[MOUNT_EXEC_REMOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 121         SD_BUS_VTABLE_END
 122 };
 123
 124 static int bus_mount_set_transient_property(
 125                 Mount *m,
 126                 const char *name,
 127                 sd_bus_message *message,
 128                 UnitSetPropertiesMode mode,
 129                 sd_bus_error *error) {
 130
 131         const char *new_property;
 132         char **property;
 133         char *p;
 134         int r;
 135
 136         assert(m);
 137         assert(name);
 138         assert(message);
 139
 140         if (streq(name, "What"))
 141                 property = &m->parameters_fragment.what;
 142         else if (streq(name, "Options"))
 143                 property = &m->parameters_fragment.options;
 144         else if (streq(name, "Type"))
 145                 property = &m->parameters_fragment.fstype;
 146         else
 147                 return 0;
 148
 149         r = sd_bus_message_read(message, "s", &new_property);
 150         if (r < 0)
 151                 return r;
 152
 153         if (mode != UNIT_CHECK) {
 154                 p = strdup(new_property);
 155                 if (!p)
 156                         return -ENOMEM;
 157
 158                 unit_write_drop_in_format(UNIT(m), mode, name, "[Mount]\n%s=%s\n",
 159                         name, new_property);
 160
 161                 free(*property);
 162                 *property = p;
 163         }
 164
 165         return 1;
 166 }
 167
 168 int bus_mount_set_property(
 169                 Unit *u,
 170                 const char *name,
 171                 sd_bus_message *message,
 172                 UnitSetPropertiesMode mode,
 173                 sd_bus_error *error) {
 174
 175         Mount *m = MOUNT(u);
 176         int r;
 177
 178         assert(m);
 179         assert(name);
 180         assert(message);
 181
 182         r = bus_cgroup_set_property(u, &m->cgroup_context, name, message, mode, error);
 183         if (r != 0)
 184                 return r;
 185
 186         if (u->transient && u->load_state == UNIT_STUB) {
 187                 /* This is a transient unit, let's load a little more */
 188
 189                 r = bus_mount_set_transient_property(m, name, message, mode, error);
 190                 if (r != 0)
 191                         return r;
 192
 193                 r = bus_exec_context_set_transient_property(u, &m->exec_context, name, message, mode, error);
 194                 if (r != 0)
 195                         return r;
 196
 197                 r = bus_kill_context_set_transient_property(u, &m->kill_context, name, message, mode, error);
 198                 if (r != 0)
 199                         return r;
 200         }
 201
 202         return 0;
 203 }
 204
 205 int bus_mount_commit_properties(Unit *u) {
 206         assert(u);
 207
 208         unit_update_cgroup_members_masks(u);
 209         unit_realize_cgroup(u);
 210
 211         return 0;
 212 }