src/core/dbus-mount.c

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