src/core/dbus-mount.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include "bus-get-properties.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 #include "utf8.h"
  13
  14 static int property_get_what(
  15                 sd_bus *bus,
  16                 const char *path,
  17                 const char *interface,
  18                 const char *property,
  19                 sd_bus_message *reply,
  20                 void *userdata,
  21                 sd_bus_error *error) {
  22
  23         _cleanup_free_ char *escaped = NULL;
  24         Mount *m = ASSERT_PTR(userdata);
  25         const char *s = NULL;
  26
  27         assert(bus);
  28         assert(reply);
  29
  30         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
  31                 s = m->parameters_proc_self_mountinfo.what;
  32         else if (m->from_fragment && m->parameters_fragment.what)
  33                 s = m->parameters_fragment.what;
  34
  35         if (s) {
  36                 escaped = utf8_escape_invalid(s);
  37                 if (!escaped)
  38                         return -ENOMEM;
  39         }
  40
  41         return sd_bus_message_append_basic(reply, 's', escaped);
  42 }
  43
  44 static int property_get_options(
  45                 sd_bus *bus,
  46                 const char *path,
  47                 const char *interface,
  48                 const char *property,
  49                 sd_bus_message *reply,
  50                 void *userdata,
  51                 sd_bus_error *error) {
  52
  53         _cleanup_free_ char *escaped = NULL;
  54         Mount *m = ASSERT_PTR(userdata);
  55         const char *s = NULL;
  56
  57         assert(bus);
  58         assert(reply);
  59
  60         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.options)
  61                 s = m->parameters_proc_self_mountinfo.options;
  62         else if (m->from_fragment && m->parameters_fragment.options)
  63                 s = m->parameters_fragment.options;
  64
  65         if (s) {
  66                 escaped = utf8_escape_invalid(s);
  67                 if (!escaped)
  68                         return -ENOMEM;
  69         }
  70
  71         return sd_bus_message_append_basic(reply, 's', escaped);
  72 }
  73
  74 static const char *mount_get_fstype(const Mount *m) {
  75         if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.fstype)
  76                 return m->parameters_proc_self_mountinfo.fstype;
  77         else if (m->from_fragment && m->parameters_fragment.fstype)
  78                 return m->parameters_fragment.fstype;
  79         return NULL;
  80 }
  81
  82 static BUS_DEFINE_PROPERTY_GET(property_get_type, "s", Mount, mount_get_fstype);
  83 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, mount_result, MountResult);
  84
  85 const sd_bus_vtable bus_mount_vtable[] = {
  86         SD_BUS_VTABLE_START(0),
  87         SD_BUS_PROPERTY("Where", "s", NULL, offsetof(Mount, where), SD_BUS_VTABLE_PROPERTY_CONST),
  88         SD_BUS_PROPERTY("What", "s", property_get_what, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  89         SD_BUS_PROPERTY("Options","s", property_get_options, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  90         SD_BUS_PROPERTY("Type", "s", property_get_type, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  91         SD_BUS_PROPERTY("TimeoutUSec", "t", bus_property_get_usec, offsetof(Mount, timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST),
  92         SD_BUS_PROPERTY("ControlPID", "u", bus_property_get_pid, offsetof(Mount, control_pid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  93         SD_BUS_PROPERTY("DirectoryMode", "u", bus_property_get_mode, offsetof(Mount, directory_mode), SD_BUS_VTABLE_PROPERTY_CONST),
  94         SD_BUS_PROPERTY("SloppyOptions", "b", bus_property_get_bool, offsetof(Mount, sloppy_options), SD_BUS_VTABLE_PROPERTY_CONST),
  95         SD_BUS_PROPERTY("LazyUnmount", "b", bus_property_get_bool, offsetof(Mount, lazy_unmount), SD_BUS_VTABLE_PROPERTY_CONST),
  96         SD_BUS_PROPERTY("ForceUnmount", "b", bus_property_get_bool, offsetof(Mount, force_unmount), SD_BUS_VTABLE_PROPERTY_CONST),
  97         SD_BUS_PROPERTY("ReadWriteOnly", "b", bus_property_get_bool, offsetof(Mount, read_write_only), SD_BUS_VTABLE_PROPERTY_CONST),
  98         SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Mount, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  99         SD_BUS_PROPERTY("UID", "u", bus_property_get_uid, offsetof(Unit, ref_uid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 100         SD_BUS_PROPERTY("GID", "u", bus_property_get_gid, offsetof(Unit, ref_gid), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 101         BUS_EXEC_COMMAND_VTABLE("ExecMount", offsetof(Mount, exec_command[MOUNT_EXEC_MOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 102         BUS_EXEC_COMMAND_VTABLE("ExecUnmount", offsetof(Mount, exec_command[MOUNT_EXEC_UNMOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 103         BUS_EXEC_COMMAND_VTABLE("ExecRemount", offsetof(Mount, exec_command[MOUNT_EXEC_REMOUNT]), SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
 104         SD_BUS_VTABLE_END
 105 };
 106
 107 static int bus_mount_set_transient_property(
 108                 Mount *m,
 109                 const char *name,
 110                 sd_bus_message *message,
 111                 UnitWriteFlags flags,
 112                 sd_bus_error *error) {
 113
 114         Unit *u = UNIT(m);
 115
 116         assert(m);
 117         assert(name);
 118         assert(message);
 119
 120         flags |= UNIT_PRIVATE;
 121
 122         if (streq(name, "Where"))
 123                 return bus_set_transient_path(u, name, &m->where, message, flags, error);
 124
 125         if (streq(name, "What"))
 126                 return bus_set_transient_string(u, name, &m->parameters_fragment.what, message, flags, error);
 127
 128         if (streq(name, "Options"))
 129                 return bus_set_transient_string(u, name, &m->parameters_fragment.options, message, flags, error);
 130
 131         if (streq(name, "Type"))
 132                 return bus_set_transient_string(u, name, &m->parameters_fragment.fstype, message, flags, error);
 133
 134         if (streq(name, "TimeoutUSec"))
 135                 return bus_set_transient_usec_fix_0(u, name, &m->timeout_usec, message, flags, error);
 136
 137         if (streq(name, "DirectoryMode"))
 138                 return bus_set_transient_mode_t(u, name, &m->directory_mode, message, flags, error);
 139
 140         if (streq(name, "SloppyOptions"))
 141                 return bus_set_transient_bool(u, name, &m->sloppy_options, message, flags, error);
 142
 143         if (streq(name, "LazyUnmount"))
 144                 return bus_set_transient_bool(u, name, &m->lazy_unmount, message, flags, error);
 145
 146         if (streq(name, "ForceUnmount"))
 147                 return bus_set_transient_bool(u, name, &m->force_unmount, message, flags, error);
 148
 149         if (streq(name, "ReadWriteOnly"))
 150                 return bus_set_transient_bool(u, name, &m->read_write_only, message, flags, error);
 151
 152         return 0;
 153 }
 154
 155 int bus_mount_set_property(
 156                 Unit *u,
 157                 const char *name,
 158                 sd_bus_message *message,
 159                 UnitWriteFlags flags,
 160                 sd_bus_error *error) {
 161
 162         Mount *m = MOUNT(u);
 163         int r;
 164
 165         assert(m);
 166         assert(name);
 167         assert(message);
 168
 169         r = bus_cgroup_set_property(u, &m->cgroup_context, name, message, flags, error);
 170         if (r != 0)
 171                 return r;
 172
 173         if (u->transient && u->load_state == UNIT_STUB) {
 174                 /* This is a transient unit, let's load a little more */
 175
 176                 r = bus_mount_set_transient_property(m, name, message, flags, error);
 177                 if (r != 0)
 178                         return r;
 179
 180                 r = bus_exec_context_set_transient_property(u, &m->exec_context, name, message, flags, error);
 181                 if (r != 0)
 182                         return r;
 183
 184                 r = bus_kill_context_set_transient_property(u, &m->kill_context, name, message, flags, error);
 185                 if (r != 0)
 186                         return r;
 187         }
 188
 189         return 0;
 190 }
 191
 192 int bus_mount_commit_properties(Unit *u) {
 193         assert(u);
 194
 195         unit_realize_cgroup(u);
 196
 197         return 0;
 198 }