src/core/dbus-mount.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2010 Lennart Poettering
   6 ***/
   7
   8 #include "bus-util.h"
   9 #include "dbus-cgroup.h"
  10 #include "dbus-execute.h"
  11 #include "dbus-kill.h"
  12 #include "dbus-mount.h"
  13 #include "dbus-util.h"
  14 #include "mount.h"
  15 #include "string-util.h"
  16 #include "unit.h"
  17
  18 static int property_get_what(
  19                 sd_bus *bus,
  20                 const char *path,
  21                 const char *interface,
  22                 const char *property,
  23                 sd_bus_message *reply,
  24                 void *userdata,
  25                 sd_bus_error *error) {
  26
  27         Mount *m = userdata;
  28         const char *d = NULL;
  29
  30         assert(bus);
  31         assert(reply);
  32         assert(m);
  33
  34         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
  35                 d = m->parameters_proc_self_mountinfo.what;
  36         else if (m->from_fragment && m->parameters_fragment.what)
  37                 d = m->parameters_fragment.what;
  38
  39         return sd_bus_message_append(reply, "s", d);
  40 }
  41
  42 static int property_get_options(
  43                 sd_bus *bus,
  44                 const char *path,
  45                 const char *interface,
  46                 const char *property,
  47                 sd_bus_message *reply,
  48                 void *userdata,
  49                 sd_bus_error *error) {
  50
  51         Mount *m = userdata;
  52         const char *d = NULL;
  53
  54         assert(bus);
  55         assert(reply);
  56         assert(m);
  57
  58         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.options)
  59                 d = m->parameters_proc_self_mountinfo.options;
  60         else if (m->from_fragment && m->parameters_fragment.options)
  61                 d = m->parameters_fragment.options;
  62
  63         return sd_bus_message_append(reply, "s", d);
  64 }
  65
  66 static int property_get_type(
  67                 sd_bus *bus,
  68                 const char *path,
  69                 const char *interface,
  70                 const char *property,
  71                 sd_bus_message *reply,
  72                 void *userdata,
  73                 sd_bus_error *error) {
  74
  75         const char *fstype = NULL;
  76         Mount *m = userdata;
  77
  78         assert(bus);
  79         assert(reply);
  80         assert(m);
  81
  82         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.fstype)
  83                 fstype = m->parameters_proc_self_mountinfo.fstype;
  84         else if (m->from_fragment && m->parameters_fragment.fstype)
  85                 fstype = m->parameters_fragment.fstype;
  86
  87         return sd_bus_message_append(reply, "s", fstype);
  88 }
  89
  90 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, mount_result, MountResult);
  91
  92 const sd_bus_vtable bus_mount_vtable[] = {
  93         SD_BUS_VTABLE_START(0),
  94         SD_BUS_PROPERTY("Where", "s", NULL, offsetof(Mount, where), SD_BUS_VTABLE_PROPERTY_CONST),
  95         SD_BUS_PROPERTY("What", "s", property_get_what, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  96         SD_BUS_PROPERTY("Options","s", property_get_options, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  97         SD_BUS_PROPERTY("Type", "s", property_get_type, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  98         SD_BUS_PROPERTY("TimeoutUSec", "t", bus_property_get_usec, offsetof(Mount, timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
  99         SD_BUS_PROPERTY("ControlPID", "u", bus_property_get_pid, offsetof(Mount, control_pid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 100         SD_BUS_PROPERTY("DirectoryMode", "u", bus_property_get_mode, offsetof(Mount, directory_mode), SD_BUS_VTABLE_PROPERTY_CONST),
 101         SD_BUS_PROPERTY("SloppyOptions", "b", bus_property_get_bool, offsetof(Mount, sloppy_options), SD_BUS_VTABLE_PROPERTY_CONST),
 102         SD_BUS_PROPERTY("LazyUnmount", "b", bus_property_get_bool, offsetof(Mount, lazy_unmount), SD_BUS_VTABLE_PROPERTY_CONST),
 103         SD_BUS_PROPERTY("ForceUnmount", "b", bus_property_get_bool, offsetof(Mount, force_unmount), SD_BUS_VTABLE_PROPERTY_CONST),
 104         SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Mount, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 105         SD_BUS_PROPERTY("UID", "u", NULL, offsetof(Unit, ref_uid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 106         SD_BUS_PROPERTY("GID", "u", NULL, offsetof(Unit, ref_gid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 107         BUS_EXEC_COMMAND_VTABLE("ExecMount", offsetof(Mount, exec_command[MOUNT_EXEC_MOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 108         BUS_EXEC_COMMAND_VTABLE("ExecUnmount", offsetof(Mount, exec_command[MOUNT_EXEC_UNMOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 109         BUS_EXEC_COMMAND_VTABLE("ExecRemount", offsetof(Mount, exec_command[MOUNT_EXEC_REMOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 110         SD_BUS_VTABLE_END
 111 };
 112
 113 static int bus_mount_set_transient_property(
 114                 Mount *m,
 115                 const char *name,
 116                 sd_bus_message *message,
 117                 UnitWriteFlags flags,
 118                 sd_bus_error *error) {
 119
 120         Unit *u = UNIT(m);
 121
 122         assert(m);
 123         assert(name);
 124         assert(message);
 125
 126         flags |= UNIT_PRIVATE;
 127
 128         if (streq(name, "Where"))
 129                 return bus_set_transient_path(u, name, &m->where, message, flags, error);
 130
 131         if (streq(name, "What"))
 132                 return bus_set_transient_string(u, name, &m->parameters_fragment.what, message, flags, error);
 133
 134         if (streq(name, "Options"))
 135                 return bus_set_transient_string(u, name, &m->parameters_fragment.options, message, flags, error);
 136
 137         if (streq(name, "Type"))
 138                 return bus_set_transient_string(u, name, &m->parameters_fragment.fstype, message, flags, error);
 139
 140         if (streq(name, "TimeoutUSec"))
 141                 return bus_set_transient_usec_fix_0(u, name, &m->timeout_usec, message, flags, error);
 142
 143         if (streq(name, "DirectoryMode"))
 144                 return bus_set_transient_mode_t(u, name, &m->directory_mode, message, flags, error);
 145
 146         if (streq(name, "SloppyOptions"))
 147                 return bus_set_transient_bool(u, name, &m->sloppy_options, message, flags, error);
 148
 149         if (streq(name, "LazyUnmount"))
 150                 return bus_set_transient_bool(u, name, &m->lazy_unmount, message, flags, error);
 151
 152         if (streq(name, "ForceUnmount"))
 153                 return bus_set_transient_bool(u, name, &m->force_unmount, message, flags, error);
 154
 155         return 0;
 156 }
 157
 158 int bus_mount_set_property(
 159                 Unit *u,
 160                 const char *name,
 161                 sd_bus_message *message,
 162                 UnitWriteFlags flags,
 163                 sd_bus_error *error) {
 164
 165         Mount *m = MOUNT(u);
 166         int r;
 167
 168         assert(m);
 169         assert(name);
 170         assert(message);
 171
 172         r = bus_cgroup_set_property(u, &m->cgroup_context, name, message, flags, error);
 173         if (r != 0)
 174                 return r;
 175
 176         if (u->transient && u->load_state == UNIT_STUB) {
 177                 /* This is a transient unit, let's load a little more */
 178
 179                 r = bus_mount_set_transient_property(m, name, message, flags, error);
 180                 if (r != 0)
 181                         return r;
 182
 183                 r = bus_exec_context_set_transient_property(u, &m->exec_context, name, message, flags, error);
 184                 if (r != 0)
 185                         return r;
 186
 187                 r = bus_kill_context_set_transient_property(u, &m->kill_context, name, message, flags, error);
 188                 if (r != 0)
 189                         return r;
 190         }
 191
 192         return 0;
 193 }
 194
 195 int bus_mount_commit_properties(Unit *u) {
 196         assert(u);
 197
 198         unit_update_cgroup_members_masks(u);
 199         unit_realize_cgroup(u);
 200
 201         return 0;
 202 }