src/core/dbus-mount.c

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