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 const char *mount_get_what(const Mount *m) {
  19         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
  20                 return m->parameters_proc_self_mountinfo.what;
  21         if (m->from_fragment && m->parameters_fragment.what)
  22                 return m->parameters_fragment.what;
  23         return NULL;
  24 }
  25
  26 static const char *mount_get_options(const Mount *m) {
  27         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.options)
  28                 return m->parameters_proc_self_mountinfo.options;
  29         if (m->from_fragment && m->parameters_fragment.options)
  30                 return m->parameters_fragment.options;
  31         return NULL;
  32 }
  33
  34 static const char *mount_get_fstype(const Mount *m) {
  35         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.fstype)
  36                 return m->parameters_proc_self_mountinfo.fstype;
  37         else if (m->from_fragment && m->parameters_fragment.fstype)
  38                 return m->parameters_fragment.fstype;
  39         return NULL;
  40 }
  41
  42 static BUS_DEFINE_PROPERTY_GET(property_get_what, "s", Mount, mount_get_what);
  43 static BUS_DEFINE_PROPERTY_GET(property_get_options, "s", Mount, mount_get_options);
  44 static BUS_DEFINE_PROPERTY_GET(property_get_type, "s", Mount, mount_get_fstype);
  45 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, mount_result, MountResult);
  46
  47 const sd_bus_vtable bus_mount_vtable[] = {
  48         SD_BUS_VTABLE_START(0),
  49         SD_BUS_PROPERTY("Where", "s", NULL, offsetof(Mount, where), SD_BUS_VTABLE_PROPERTY_CONST),
  50         SD_BUS_PROPERTY("What", "s", property_get_what, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  51         SD_BUS_PROPERTY("Options","s", property_get_options, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  52         SD_BUS_PROPERTY("Type", "s", property_get_type, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  53         SD_BUS_PROPERTY("TimeoutUSec", "t", bus_property_get_usec, offsetof(Mount, timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
  54         SD_BUS_PROPERTY("ControlPID", "u", bus_property_get_pid, offsetof(Mount, control_pid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  55         SD_BUS_PROPERTY("DirectoryMode", "u", bus_property_get_mode, offsetof(Mount, directory_mode), SD_BUS_VTABLE_PROPERTY_CONST),
  56         SD_BUS_PROPERTY("SloppyOptions", "b", bus_property_get_bool, offsetof(Mount, sloppy_options), SD_BUS_VTABLE_PROPERTY_CONST),
  57         SD_BUS_PROPERTY("LazyUnmount", "b", bus_property_get_bool, offsetof(Mount, lazy_unmount), SD_BUS_VTABLE_PROPERTY_CONST),
  58         SD_BUS_PROPERTY("ForceUnmount", "b", bus_property_get_bool, offsetof(Mount, force_unmount), SD_BUS_VTABLE_PROPERTY_CONST),
  59         SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Mount, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  60         SD_BUS_PROPERTY("UID", "u", bus_property_get_uid, offsetof(Unit, ref_uid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  61         SD_BUS_PROPERTY("GID", "u", bus_property_get_gid, offsetof(Unit, ref_gid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  62         BUS_EXEC_COMMAND_VTABLE("ExecMount", offsetof(Mount, exec_command[MOUNT_EXEC_MOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
  63         BUS_EXEC_COMMAND_VTABLE("ExecUnmount", offsetof(Mount, exec_command[MOUNT_EXEC_UNMOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
  64         BUS_EXEC_COMMAND_VTABLE("ExecRemount", offsetof(Mount, exec_command[MOUNT_EXEC_REMOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
  65         SD_BUS_VTABLE_END
  66 };
  67
  68 static int bus_mount_set_transient_property(
  69                 Mount *m,
  70                 const char *name,
  71                 sd_bus_message *message,
  72                 UnitWriteFlags flags,
  73                 sd_bus_error *error) {
  74
  75         Unit *u = UNIT(m);
  76
  77         assert(m);
  78         assert(name);
  79         assert(message);
  80
  81         flags |= UNIT_PRIVATE;
  82
  83         if (streq(name, "Where"))
  84                 return bus_set_transient_path(u, name, &m->where, message, flags, error);
  85
  86         if (streq(name, "What"))
  87                 return bus_set_transient_string(u, name, &m->parameters_fragment.what, message, flags, error);
  88
  89         if (streq(name, "Options"))
  90                 return bus_set_transient_string(u, name, &m->parameters_fragment.options, message, flags, error);
  91
  92         if (streq(name, "Type"))
  93                 return bus_set_transient_string(u, name, &m->parameters_fragment.fstype, message, flags, error);
  94
  95         if (streq(name, "TimeoutUSec"))
  96                 return bus_set_transient_usec_fix_0(u, name, &m->timeout_usec, message, flags, error);
  97
  98         if (streq(name, "DirectoryMode"))
  99                 return bus_set_transient_mode_t(u, name, &m->directory_mode, message, flags, error);
 100
 101         if (streq(name, "SloppyOptions"))
 102                 return bus_set_transient_bool(u, name, &m->sloppy_options, message, flags, error);
 103
 104         if (streq(name, "LazyUnmount"))
 105                 return bus_set_transient_bool(u, name, &m->lazy_unmount, message, flags, error);
 106
 107         if (streq(name, "ForceUnmount"))
 108                 return bus_set_transient_bool(u, name, &m->force_unmount, message, flags, error);
 109
 110         return 0;
 111 }
 112
 113 int bus_mount_set_property(
 114                 Unit *u,
 115                 const char *name,
 116                 sd_bus_message *message,
 117                 UnitWriteFlags flags,
 118                 sd_bus_error *error) {
 119
 120         Mount *m = MOUNT(u);
 121         int r;
 122
 123         assert(m);
 124         assert(name);
 125         assert(message);
 126
 127         r = bus_cgroup_set_property(u, &m->cgroup_context, name, message, flags, error);
 128         if (r != 0)
 129                 return r;
 130
 131         if (u->transient && u->load_state == UNIT_STUB) {
 132                 /* This is a transient unit, let's load a little more */
 133
 134                 r = bus_mount_set_transient_property(m, name, message, flags, error);
 135                 if (r != 0)
 136                         return r;
 137
 138                 r = bus_exec_context_set_transient_property(u, &m->exec_context, name, message, flags, error);
 139                 if (r != 0)
 140                         return r;
 141
 142                 r = bus_kill_context_set_transient_property(u, &m->kill_context, name, message, flags, error);
 143                 if (r != 0)
 144                         return r;
 145         }
 146
 147         return 0;
 148 }
 149
 150 int bus_mount_commit_properties(Unit *u) {
 151         assert(u);
 152
 153         unit_update_cgroup_members_masks(u);
 154         unit_realize_cgroup(u);
 155
 156         return 0;
 157 }