build-sys: move source files to subdirectory

1 files changed, 1539 insertions, 0 deletions

diff --git a/src/mount.c b/src/mount.c
new file mode 100644
index 0000000000..ec03a52f6a
--- /dev/null
+++ b/src/mount.c
@@ -0,0 +1,1539 @@
+/*-*- Mode: C; c-basic-offset: 8 -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <stdio.h>
+#include <mntent.h>
+#include <sys/epoll.h>
+#include <signal.h>
+
+#include "unit.h"
+#include "mount.h"
+#include "load-fragment.h"
+#include "load-dropin.h"
+#include "log.h"
+#include "strv.h"
+#include "mount-setup.h"
+#include "unit-name.h"
+#include "mount.h"
+#include "dbus-mount.h"
+
+static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
+        [MOUNT_DEAD] = UNIT_INACTIVE,
+        [MOUNT_MOUNTING] = UNIT_ACTIVATING,
+        [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
+        [MOUNT_MOUNTED] = UNIT_ACTIVE,
+        [MOUNT_REMOUNTING] = UNIT_ACTIVE_RELOADING,
+        [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
+        [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
+        [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
+        [MOUNT_REMOUNTING_SIGTERM] = UNIT_ACTIVE_RELOADING,
+        [MOUNT_REMOUNTING_SIGKILL] = UNIT_ACTIVE_RELOADING,
+        [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
+        [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
+        [MOUNT_MAINTAINANCE] = UNIT_INACTIVE,
+};
+
+static void mount_init(Unit *u) {
+        Mount *m = MOUNT(u);
+
+        assert(u);
+        assert(u->meta.load_state == UNIT_STUB);
+
+        m->timeout_usec = DEFAULT_TIMEOUT_USEC;
+        exec_context_init(&m->exec_context);
+
+        /* We need to make sure that /bin/mount is always called in
+         * the same process group as us, so that the autofs kernel
+         * side doesn't send us another mount request while we are
+         * already trying to comply its last one. */
+        m->exec_context.no_setsid = true;
+
+        m->timer_watch.type = WATCH_INVALID;
+
+        m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
+}
+
+static void mount_unwatch_control_pid(Mount *m) {
+        assert(m);
+
+        if (m->control_pid <= 0)
+                return;
+
+        unit_unwatch_pid(UNIT(m), m->control_pid);
+        m->control_pid = 0;
+}
+
+static void mount_parameters_done(MountParameters *p) {
+        assert(p);
+
+        free(p->what);
+        free(p->options);
+        free(p->fstype);
+
+        p->what = p->options = p->fstype = NULL;
+}
+
+static void mount_done(Unit *u) {
+        Mount *m = MOUNT(u);
+
+        assert(m);
+
+        free(m->where);
+        m->where = NULL;
+
+        mount_parameters_done(&m->parameters_etc_fstab);
+        mount_parameters_done(&m->parameters_proc_self_mountinfo);
+        mount_parameters_done(&m->parameters_fragment);
+
+        exec_context_done(&m->exec_context);
+        exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
+        m->control_command = NULL;
+
+        mount_unwatch_control_pid(m);
+
+        unit_unwatch_timer(u, &m->timer_watch);
+}
+
+static int mount_add_mount_links(Mount *m) {
+        Meta *other;
+        int r;
+
+        assert(m);
+
+        /* Adds in links to other mount points that might lie below or
+         * above us in the hierarchy */
+
+        LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_MOUNT]) {
+                Mount *n = (Mount*) other;
+
+                if (n == m)
+                        continue;
+
+                if (n->meta.load_state != UNIT_LOADED)
+                        continue;
+
+                if (path_startswith(m->where, n->where)) {
+
+                        if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
+                                return r;
+
+                        if (n->from_etc_fstab || n->from_fragment)
+                                if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
+                                        return r;
+
+                } else if (path_startswith(n->where, m->where)) {
+
+                        if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(n), true)) < 0)
+                                return r;
+
+                        if (m->from_etc_fstab || m->from_fragment)
+                                if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
+                                        return r;
+                }
+        }
+
+        return 0;
+}
+
+static int mount_add_swap_links(Mount *m) {
+        Meta *other;
+        int r;
+
+        assert(m);
+
+        LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SWAP])
+                if ((r = swap_add_one_mount_link((Swap*) other, m)) < 0)
+                        return r;
+
+        return 0;
+}
+
+static int mount_add_automount_links(Mount *m) {
+        Meta *other;
+        int r;
+
+        assert(m);
+
+        LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_AUTOMOUNT])
+                if ((r = automount_add_one_mount_link((Automount*) other, m)) < 0)
+                        return r;
+
+        return 0;
+}
+
+static int mount_add_socket_links(Mount *m) {
+        Meta *other;
+        int r;
+
+        assert(m);
+
+        LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_SOCKET])
+                if ((r = socket_add_one_mount_link((Socket*) other, m)) < 0)
+                        return r;
+
+        return 0;
+}
+
+static char* mount_test_option(const char *haystack, const char *needle) {
+        struct mntent me;
+
+        assert(needle);
+
+        /* Like glibc's hasmntopt(), but works on a string, not a
+         * struct mntent */
+
+        if (!haystack)
+                return false;
+
+        zero(me);
+        me.mnt_opts = (char*) haystack;
+
+        return hasmntopt(&me, needle);
+}
+
+static int mount_add_target_links(Mount *m) {
+        const char *target;
+        MountParameters *p;
+        Unit *tu;
+        int r;
+        bool noauto, handle, automount;
+
+        assert(m);
+
+        if (m->from_fragment)
+                p = &m->parameters_fragment;
+        else if (m->from_etc_fstab)
+                p = &m->parameters_etc_fstab;
+        else
+                return 0;
+
+        noauto = !!mount_test_option(p->options, MNTOPT_NOAUTO);
+        handle = !!mount_test_option(p->options, "comment=systemd.mount");
+        automount = !!mount_test_option(p->options, "comment=systemd.automount");
+
+        if (mount_test_option(p->options, "_netdev") ||
+            fstype_is_network(p->fstype))
+                target = SPECIAL_REMOTE_FS_TARGET;
+        else
+                target = SPECIAL_LOCAL_FS_TARGET;
+
+        if ((r = manager_load_unit(UNIT(m)->meta.manager, target, NULL, &tu)) < 0)
+                return r;
+
+        if (automount) {
+                Unit *am;
+
+                if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
+                        return r;
+
+                if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(am), true)) < 0)
+                        return r;
+
+                return unit_add_dependency(UNIT(am), UNIT_BEFORE, tu, true);
+
+        } else {
+
+                if (!noauto && handle)
+                        if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
+                                return r;
+
+                return unit_add_dependency(UNIT(m), UNIT_BEFORE, tu, true);
+        }
+}
+
+static int mount_verify(Mount *m) {
+        bool b;
+        char *e;
+        assert(m);
+
+        if (UNIT(m)->meta.load_state != UNIT_LOADED)
+                return 0;
+
+        if (!(e = unit_name_from_path(m->where, ".mount")))
+                return -ENOMEM;
+
+        b = unit_has_name(UNIT(m), e);
+        free(e);
+
+        if (!b) {
+                log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->meta.id);
+                return -EINVAL;
+        }
+
+        if (m->meta.fragment_path && !m->parameters_fragment.what) {
+                log_error("%s's What setting is missing. Refusing.", UNIT(m)->meta.id);
+                return -EBADMSG;
+        }
+
+        return 0;
+}
+
+static int mount_load(Unit *u) {
+        Mount *m = MOUNT(u);
+        int r;
+
+        assert(u);
+        assert(u->meta.load_state == UNIT_STUB);
+
+        if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
+                return r;
+
+        /* This is a new unit? Then let's add in some extras */
+        if (u->meta.load_state == UNIT_LOADED) {
+                const char *what = NULL;
+
+                if (m->meta.fragment_path)
+                        m->from_fragment = true;
+
+                if (!m->where)
+                        if (!(m->where = unit_name_to_path(u->meta.id)))
+                                return -ENOMEM;
+
+                path_kill_slashes(m->where);
+
+                if (!m->meta.description)
+                        if ((r = unit_set_description(u, m->where)) < 0)
+                                return r;
+
+                if (m->from_fragment && m->parameters_fragment.what)
+                        what = m->parameters_fragment.what;
+                else if (m->from_etc_fstab && m->parameters_etc_fstab.what)
+                        what = m->parameters_etc_fstab.what;
+                else if (m->from_proc_self_mountinfo && m->parameters_proc_self_mountinfo.what)
+                        what = m->parameters_proc_self_mountinfo.what;
+
+                if (what)
+                        if ((r = unit_add_node_link(u, what,
+                                                    (u->meta.manager->running_as == MANAGER_INIT ||
+                                                     u->meta.manager->running_as == MANAGER_SYSTEM))) < 0)
+                                return r;
+
+                if ((r = mount_add_mount_links(m)) < 0)
+                        return r;
+
+                if ((r = mount_add_socket_links(m)) < 0)
+                        return r;
+
+                if ((r = mount_add_swap_links(m)) < 0)
+                        return r;
+
+                if ((r = mount_add_automount_links(m)) < 0)
+                        return r;
+
+                if ((r = mount_add_target_links(m)) < 0)
+                        return r;
+
+                if ((r = unit_add_default_cgroup(u)) < 0)
+                        return r;
+        }
+
+        return mount_verify(m);
+}
+
+static int mount_notify_automount(Mount *m, int status) {
+        Unit *p;
+        int r;
+
+        assert(m);
+
+        if ((r = unit_get_related_unit(UNIT(m), ".automount", &p)) < 0)
+                return r == -ENOENT ? 0 : r;
+
+        return automount_send_ready(AUTOMOUNT(p), status);
+}
+
+static void mount_set_state(Mount *m, MountState state) {
+        MountState old_state;
+        assert(m);
+
+        old_state = m->state;
+        m->state = state;
+
+        if (state != MOUNT_MOUNTING &&
+            state != MOUNT_MOUNTING_DONE &&
+            state != MOUNT_REMOUNTING &&
+            state != MOUNT_UNMOUNTING &&
+            state != MOUNT_MOUNTING_SIGTERM &&
+            state != MOUNT_MOUNTING_SIGKILL &&
+            state != MOUNT_UNMOUNTING_SIGTERM &&
+            state != MOUNT_UNMOUNTING_SIGKILL &&
+            state != MOUNT_REMOUNTING_SIGTERM &&
+            state != MOUNT_REMOUNTING_SIGKILL) {
+                unit_unwatch_timer(UNIT(m), &m->timer_watch);
+                mount_unwatch_control_pid(m);
+                m->control_command = NULL;
+                m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
+        }
+
+        if (state == MOUNT_MOUNTED ||
+            state == MOUNT_REMOUNTING)
+                mount_notify_automount(m, 0);
+        else if (state == MOUNT_DEAD ||
+                 state == MOUNT_UNMOUNTING ||
+                 state == MOUNT_MOUNTING_SIGTERM ||
+                 state == MOUNT_MOUNTING_SIGKILL ||
+                 state == MOUNT_REMOUNTING_SIGTERM ||
+                 state == MOUNT_REMOUNTING_SIGKILL ||
+                 state == MOUNT_UNMOUNTING_SIGTERM ||
+                 state == MOUNT_UNMOUNTING_SIGKILL ||
+                 state == MOUNT_MAINTAINANCE)
+                mount_notify_automount(m, -ENODEV);
+
+        if (state != old_state)
+                log_debug("%s changed %s -> %s",
+                          UNIT(m)->meta.id,
+                          mount_state_to_string(old_state),
+                          mount_state_to_string(state));
+
+        unit_notify(UNIT(m), state_translation_table[old_state], state_translation_table[state]);
+}
+
+static int mount_coldplug(Unit *u) {
+        Mount *m = MOUNT(u);
+        MountState new_state = MOUNT_DEAD;
+        int r;
+
+        assert(m);
+        assert(m->state == MOUNT_DEAD);
+
+        if (m->deserialized_state != m->state)
+                new_state = m->deserialized_state;
+        else if (m->from_proc_self_mountinfo)
+                new_state = MOUNT_MOUNTED;
+
+        if (new_state != m->state) {
+
+                if (new_state == MOUNT_MOUNTING ||
+                    new_state == MOUNT_MOUNTING_DONE ||
+                    new_state == MOUNT_REMOUNTING ||
+                    new_state == MOUNT_UNMOUNTING ||
+                    new_state == MOUNT_MOUNTING_SIGTERM ||
+                    new_state == MOUNT_MOUNTING_SIGKILL ||
+                    new_state == MOUNT_UNMOUNTING_SIGTERM ||
+                    new_state == MOUNT_UNMOUNTING_SIGKILL ||
+                    new_state == MOUNT_REMOUNTING_SIGTERM ||
+                    new_state == MOUNT_REMOUNTING_SIGKILL) {
+
+                        if (m->control_pid <= 0)
+                                return -EBADMSG;
+
+                        if ((r = unit_watch_pid(UNIT(m), m->control_pid)) < 0)
+                                return r;
+
+                        if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
+                                return r;
+                }
+
+                mount_set_state(m, new_state);
+        }
+
+        return 0;
+}
+
+static void mount_dump(Unit *u, FILE *f, const char *prefix) {
+        Mount *m = MOUNT(u);
+        MountParameters *p;
+
+        assert(m);
+        assert(f);
+
+        if (m->from_proc_self_mountinfo)
+                p = &m->parameters_proc_self_mountinfo;
+        else if (m->from_fragment)
+                p = &m->parameters_fragment;
+        else
+                p = &m->parameters_etc_fstab;
+
+        fprintf(f,
+                "%sMount State: %s\n"
+                "%sWhere: %s\n"
+                "%sWhat: %s\n"
+                "%sFile System Type: %s\n"
+                "%sOptions: %s\n"
+                "%sFrom /etc/fstab: %s\n"
+                "%sFrom /proc/self/mountinfo: %s\n"
+                "%sFrom fragment: %s\n"
+                "%sKillMode: %s\n",
+                prefix, mount_state_to_string(m->state),
+                prefix, m->where,
+                prefix, strna(p->what),
+                prefix, strna(p->fstype),
+                prefix, strna(p->options),
+                prefix, yes_no(m->from_etc_fstab),
+                prefix, yes_no(m->from_proc_self_mountinfo),
+                prefix, yes_no(m->from_fragment),
+                prefix, kill_mode_to_string(m->kill_mode));
+
+        if (m->control_pid > 0)
+                fprintf(f,
+                        "%sControl PID: %llu\n",
+                        prefix, (unsigned long long) m->control_pid);
+
+        exec_context_dump(&m->exec_context, f, prefix);
+}
+
+static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
+        pid_t pid;
+        int r;
+
+        assert(m);
+        assert(c);
+        assert(_pid);
+
+        if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
+                goto fail;
+
+        if ((r = exec_spawn(c,
+                            NULL,
+                            &m->exec_context,
+                            NULL, 0,
+                            m->meta.manager->environment,
+                            true,
+                            true,
+                            UNIT(m)->meta.manager->confirm_spawn,
+                            UNIT(m)->meta.cgroup_bondings,
+                            &pid)) < 0)
+                goto fail;
+
+        if ((r = unit_watch_pid(UNIT(m), pid)) < 0)
+                /* FIXME: we need to do something here */
+                goto fail;
+
+        *_pid = pid;
+
+        return 0;
+
+fail:
+        unit_unwatch_timer(UNIT(m), &m->timer_watch);
+
+        return r;
+}
+
+static void mount_enter_dead(Mount *m, bool success) {
+        assert(m);
+
+        if (!success)
+                m->failure = true;
+
+        mount_set_state(m, m->failure ? MOUNT_MAINTAINANCE : MOUNT_DEAD);
+}
+
+static void mount_enter_mounted(Mount *m, bool success) {
+        assert(m);
+
+        if (!success)
+                m->failure = true;
+
+        mount_set_state(m, MOUNT_MOUNTED);
+}
+
+static void mount_enter_signal(Mount *m, MountState state, bool success) {
+        int r;
+        bool sent = false;
+
+        assert(m);
+
+        if (!success)
+                m->failure = true;
+
+        if (m->kill_mode != KILL_NONE) {
+                int sig = (state == MOUNT_MOUNTING_SIGTERM ||
+                           state == MOUNT_UNMOUNTING_SIGTERM ||
+                           state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
+
+                if (m->kill_mode == KILL_CONTROL_GROUP) {
+
+                        if ((r = cgroup_bonding_kill_list(UNIT(m)->meta.cgroup_bondings, sig)) < 0) {
+                                if (r != -EAGAIN && r != -ESRCH)
+                                        goto fail;
+                        } else
+                                sent = true;
+                }
+
+                if (!sent && m->control_pid > 0)
+                        if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) {
+                                r = -errno;
+                                goto fail;
+                        }
+        }
+
+        if (sent) {
+                if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0)
+                        goto fail;
+
+                mount_set_state(m, state);
+        } else if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
+                mount_enter_mounted(m, true);
+        else
+                mount_enter_dead(m, true);
+
+        return;
+
+fail:
+        log_warning("%s failed to kill processes: %s", UNIT(m)->meta.id, strerror(-r));
+
+        if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
+                mount_enter_mounted(m, false);
+        else
+                mount_enter_dead(m, false);
+}
+
+static void mount_enter_unmounting(Mount *m, bool success) {
+        int r;
+
+        assert(m);
+
+        if (!success)
+                m->failure = true;
+
+        m->control_command_id = MOUNT_EXEC_UNMOUNT;
+        m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
+
+        if ((r = exec_command_set(
+                             m->control_command,
+                             "/bin/umount",
+                             m->where,
+                             NULL)) < 0)
+                goto fail;
+
+        mount_unwatch_control_pid(m);
+
+        if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
+                goto fail;
+
+        mount_set_state(m, MOUNT_UNMOUNTING);
+
+        return;
+
+fail:
+        log_warning("%s failed to run umount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
+        mount_enter_mounted(m, false);
+}
+
+static void mount_enter_mounting(Mount *m) {
+        int r;
+
+        assert(m);
+
+        m->control_command_id = MOUNT_EXEC_MOUNT;
+        m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
+
+        if (m->from_fragment)
+                r = exec_command_set(
+                                m->control_command,
+                                "/bin/mount",
+                                m->parameters_fragment.what,
+                                m->where,
+                                "-t", m->parameters_fragment.fstype,
+                                m->parameters_fragment.options ? "-o" : NULL, m->parameters_fragment.options,
+                                NULL);
+        else if (m->from_etc_fstab)
+                r = exec_command_set(
+                                m->control_command,
+                                "/bin/mount",
+                                m->where,
+                                NULL);
+        else
+                r = -ENOENT;
+
+        if (r < 0)
+                goto fail;
+
+        mount_unwatch_control_pid(m);
+
+        if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
+                goto fail;
+
+        mount_set_state(m, MOUNT_MOUNTING);
+
+        return;
+
+fail:
+        log_warning("%s failed to run mount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
+        mount_enter_dead(m, false);
+}
+
+static void mount_enter_mounting_done(Mount *m) {
+        assert(m);
+
+        mount_set_state(m, MOUNT_MOUNTING_DONE);
+}
+
+static void mount_enter_remounting(Mount *m, bool success) {
+        int r;
+
+        assert(m);
+
+        if (!success)
+                m->failure = true;
+
+        m->control_command_id = MOUNT_EXEC_REMOUNT;
+        m->control_command = m->exec_command + MOUNT_EXEC_REMOUNT;
+
+        if (m->from_fragment) {
+                char *buf = NULL;
+                const char *o;
+
+                if (m->parameters_fragment.options) {
+                        if (!(buf = strappend("remount,", m->parameters_fragment.options))) {
+                                r = -ENOMEM;
+                                goto fail;
+                        }
+
+                        o = buf;
+                } else
+                        o = "remount";
+
+                r = exec_command_set(
+                                m->control_command,
+                                "/bin/mount",
+                                m->parameters_fragment.what,
+                                m->where,
+                                "-t", m->parameters_fragment.fstype,
+                                "-o", o,
+                                NULL);
+
+                free(buf);
+        } else if (m->from_etc_fstab)
+                r = exec_command_set(
+                                m->control_command,
+                                "/bin/mount",
+                                m->where,
+                                "-o", "remount",
+                                NULL);
+        else
+                r = -ENOENT;
+
+        if (r < 0) {
+                r = -ENOMEM;
+                goto fail;
+        }
+
+        mount_unwatch_control_pid(m);
+
+        if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
+                goto fail;
+
+        mount_set_state(m, MOUNT_REMOUNTING);
+
+        return;
+
+fail:
+        mount_enter_mounted(m, false);
+}
+
+static int mount_start(Unit *u) {
+        Mount *m = MOUNT(u);
+
+        assert(m);
+
+        /* We cannot fulfill this request right now, try again later
+         * please! */
+        if (m->state == MOUNT_UNMOUNTING ||
+            m->state == MOUNT_UNMOUNTING_SIGTERM ||
+            m->state == MOUNT_UNMOUNTING_SIGKILL)
+                return -EAGAIN;
+
+        /* Already on it! */
+        if (m->state == MOUNT_MOUNTING ||
+            m->state == MOUNT_MOUNTING_SIGTERM ||
+            m->state == MOUNT_MOUNTING_SIGKILL)
+                return 0;
+
+        assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTAINANCE);
+
+        m->failure = false;
+        mount_enter_mounting(m);
+        return 0;
+}
+
+static int mount_stop(Unit *u) {
+        Mount *m = MOUNT(u);
+
+        assert(m);
+
+        /* Cann't do this right now. */
+        if (m->state == MOUNT_MOUNTING ||
+            m->state == MOUNT_MOUNTING_DONE ||
+            m->state == MOUNT_MOUNTING_SIGTERM ||
+            m->state == MOUNT_MOUNTING_SIGKILL ||
+            m->state == MOUNT_REMOUNTING ||
+            m->state == MOUNT_REMOUNTING_SIGTERM ||
+            m->state == MOUNT_REMOUNTING_SIGKILL)
+                return -EAGAIN;
+
+        /* Already on it */
+        if (m->state == MOUNT_UNMOUNTING ||
+            m->state == MOUNT_UNMOUNTING_SIGKILL ||
+            m->state == MOUNT_UNMOUNTING_SIGTERM)
+                return 0;
+
+        assert(m->state == MOUNT_MOUNTED);
+
+        mount_enter_unmounting(m, true);
+        return 0;
+}
+
+static int mount_reload(Unit *u) {
+        Mount *m = MOUNT(u);
+
+        assert(m);
+
+        if (m->state == MOUNT_MOUNTING_DONE)
+                return -EAGAIN;
+
+        assert(m->state == MOUNT_MOUNTED);
+
+        mount_enter_remounting(m, true);
+        return 0;
+}
+
+static int mount_serialize(Unit *u, FILE *f, FDSet *fds) {
+        Mount *m = MOUNT(u);
+
+        assert(m);
+        assert(f);
+        assert(fds);
+
+        unit_serialize_item(u, f, "state", mount_state_to_string(m->state));
+        unit_serialize_item(u, f, "failure", yes_no(m->failure));
+
+        if (m->control_pid > 0)
+                unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) m->control_pid);
+
+        if (m->control_command_id >= 0)
+                unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id));
+
+        return 0;
+}
+
+static int mount_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
+        Mount *m = MOUNT(u);
+        int r;
+
+        assert(u);
+        assert(key);
+        assert(value);
+        assert(fds);
+
+        if (streq(key, "state")) {
+                MountState state;
+
+                if ((state = mount_state_from_string(value)) < 0)
+                        log_debug("Failed to parse state value %s", value);
+                else
+                        m->deserialized_state = state;
+        } else if (streq(key, "failure")) {
+                int b;
+
+                if ((b = parse_boolean(value)) < 0)
+                        log_debug("Failed to parse failure value %s", value);
+                else
+                        m->failure = b || m->failure;
+
+        } else if (streq(key, "control-pid")) {
+                unsigned pid;
+
+                if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
+                        log_debug("Failed to parse control-pid value %s", value);
+                else
+                        m->control_pid = (pid_t) pid;
+        } else if (streq(key, "control-command")) {
+                MountExecCommand id;
+
+                if ((id = mount_exec_command_from_string(value)) < 0)
+                        log_debug("Failed to parse exec-command value %s", value);
+                else {
+                        m->control_command_id = id;
+                        m->control_command = m->exec_command + id;
+                }
+
+        } else
+                log_debug("Unknown serialization key '%s'", key);
+
+        return 0;
+}
+
+static UnitActiveState mount_active_state(Unit *u) {
+        assert(u);
+
+        return state_translation_table[MOUNT(u)->state];
+}
+
+static const char *mount_sub_state_to_string(Unit *u) {
+        assert(u);
+
+        return mount_state_to_string(MOUNT(u)->state);
+}
+
+static bool mount_check_gc(Unit *u) {
+        Mount *m = MOUNT(u);
+
+        assert(m);
+
+        return m->from_etc_fstab || m->from_proc_self_mountinfo;
+}
+
+static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) {
+        Mount *m = MOUNT(u);
+        bool success;
+
+        assert(m);
+        assert(pid >= 0);
+
+        success = is_clean_exit(code, status);
+        m->failure = m->failure || !success;
+
+        assert(m->control_pid == pid);
+        m->control_pid = 0;
+
+        if (m->control_command) {
+                exec_status_fill(&m->control_command->exec_status, pid, code, status);
+                m->control_command = NULL;
+                m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
+        }
+
+        log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
+
+        /* Note that mount(8) returning and the kernel sending us a
+         * mount table change event might happen out-of-order. If an
+         * operation succeed we assume the kernel will follow soon too
+         * and already change into the resulting state.  If it fails
+         * we check if the kernel still knows about the mount. and
+         * change state accordingly. */
+
+        switch (m->state) {
+
+        case MOUNT_MOUNTING:
+        case MOUNT_MOUNTING_DONE:
+        case MOUNT_MOUNTING_SIGKILL:
+        case MOUNT_MOUNTING_SIGTERM:
+        case MOUNT_REMOUNTING:
+        case MOUNT_REMOUNTING_SIGKILL:
+        case MOUNT_REMOUNTING_SIGTERM:
+
+                if (success && m->from_proc_self_mountinfo)
+                        mount_enter_mounted(m, true);
+                else if (m->from_proc_self_mountinfo)
+                        mount_enter_mounted(m, false);
+                else
+                        mount_enter_dead(m, false);
+                break;
+
+        case MOUNT_UNMOUNTING:
+        case MOUNT_UNMOUNTING_SIGKILL:
+        case MOUNT_UNMOUNTING_SIGTERM:
+
+                if (success)
+                        mount_enter_dead(m, true);
+                else if (m->from_proc_self_mountinfo)
+                        mount_enter_mounted(m, false);
+                else
+                        mount_enter_dead(m, false);
+                break;
+
+        default:
+                assert_not_reached("Uh, control process died at wrong time.");
+        }
+}
+
+static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
+        Mount *m = MOUNT(u);
+
+        assert(m);
+        assert(elapsed == 1);
+        assert(w == &m->timer_watch);
+
+        switch (m->state) {
+
+        case MOUNT_MOUNTING:
+        case MOUNT_MOUNTING_DONE:
+                log_warning("%s mounting timed out. Stopping.", u->meta.id);
+                mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, false);
+                break;
+
+        case MOUNT_REMOUNTING:
+                log_warning("%s remounting timed out. Stopping.", u->meta.id);
+                mount_enter_signal(m, MOUNT_REMOUNTING_SIGTERM, false);
+                break;
+
+        case MOUNT_UNMOUNTING:
+                log_warning("%s unmounting timed out. Stopping.", u->meta.id);
+                mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, false);
+                break;
+
+        case MOUNT_MOUNTING_SIGTERM:
+                log_warning("%s mounting timed out. Killing.", u->meta.id);
+                mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
+                break;
+
+        case MOUNT_REMOUNTING_SIGTERM:
+                log_warning("%s remounting timed out. Killing.", u->meta.id);
+                mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
+                break;
+
+        case MOUNT_UNMOUNTING_SIGTERM:
+                log_warning("%s unmounting timed out. Killing.", u->meta.id);
+                mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
+                break;
+
+        case MOUNT_MOUNTING_SIGKILL:
+        case MOUNT_REMOUNTING_SIGKILL:
+        case MOUNT_UNMOUNTING_SIGKILL:
+                log_warning("%s mount process still around after SIGKILL. Ignoring.", u->meta.id);
+
+                if (m->from_proc_self_mountinfo)
+                        mount_enter_mounted(m, false);
+                else
+                        mount_enter_dead(m, false);
+                break;
+
+        default:
+                assert_not_reached("Timeout at wrong time.");
+        }
+}
+
+static int mount_add_one(
+                Manager *m,
+                const char *what,
+                const char *where,
+                const char *options,
+                const char *fstype,
+                bool from_proc_self_mountinfo,
+                bool set_flags) {
+        int r;
+        Unit *u;
+        bool delete;
+        char *e, *w = NULL, *o = NULL, *f = NULL;
+        MountParameters *p;
+
+        assert(m);
+        assert(what);
+        assert(where);
+        assert(options);
+        assert(fstype);
+
+        assert(!set_flags || from_proc_self_mountinfo);
+
+        /* Ignore API mount points. They should never be referenced in
+         * dependencies ever. */
+        if (mount_point_is_api(where))
+                return 0;
+
+        if (streq(fstype, "autofs"))
+                return 0;
+
+        /* probably some kind of swap, ignore */
+        if (!is_path(where))
+                return 0;
+
+        if (!(e = unit_name_from_path(where, ".mount")))
+                return -ENOMEM;
+
+        if (!(u = manager_get_unit(m, e))) {
+                delete = true;
+
+                if (!(u = unit_new(m))) {
+                        free(e);
+                        return -ENOMEM;
+                }
+
+                r = unit_add_name(u, e);
+                free(e);
+
+                if (r < 0)
+                        goto fail;
+
+                if (!(MOUNT(u)->where = strdup(where))) {
+                        r = -ENOMEM;
+                        goto fail;
+                }
+
+                unit_add_to_load_queue(u);
+        } else {
+                delete = false;
+                free(e);
+        }
+
+        if (!(w = strdup(what)) ||
+            !(o = strdup(options)) ||
+            !(f = strdup(fstype))) {
+                r = -ENOMEM;
+                goto fail;
+        }
+
+        if (from_proc_self_mountinfo) {
+                p = &MOUNT(u)->parameters_proc_self_mountinfo;
+
+                if (set_flags) {
+                        MOUNT(u)->is_mounted = true;
+                        MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
+                        MOUNT(u)->just_changed = !streq_ptr(p->options, o);
+                }
+
+                MOUNT(u)->from_proc_self_mountinfo = true;
+        } else {
+                p = &MOUNT(u)->parameters_etc_fstab;
+                MOUNT(u)->from_etc_fstab = true;
+        }
+
+        free(p->what);
+        p->what = w;
+
+        free(p->options);
+        p->options = o;
+
+        free(p->fstype);
+        p->fstype = f;
+
+        unit_add_to_dbus_queue(u);
+
+        return 0;
+
+fail:
+        free(w);
+        free(o);
+        free(f);
+
+        if (delete && u)
+                unit_free(u);
+
+        return r;
+}
+
+static char *fstab_node_to_udev_node(char *p) {
+        char *dn, *t;
+        int r;
+
+        /* FIXME: to follow udev's logic 100% we need to leave valid
+         * UTF8 chars unescaped */
+
+        if (startswith(p, "LABEL=")) {
+
+                if (!(t = xescape(p+6, "/ ")))
+                        return NULL;
+
+                r = asprintf(&dn, "/dev/disk/by-label/%s", t);
+                free(t);
+
+                if (r < 0)
+                        return NULL;
+
+                return dn;
+        }
+
+        if (startswith(p, "UUID=")) {
+
+                if (!(t = xescape(p+5, "/ ")))
+                        return NULL;
+
+                r = asprintf(&dn, "/dev/disk/by-uuid/%s", ascii_strlower(t));
+                free(t);
+
+                if (r < 0)
+                        return NULL;
+
+                return dn;
+        }
+
+        return strdup(p);
+}
+
+static int mount_find_pri(char *options) {
+        char *end, *pri;
+        unsigned long r;
+
+        if (!(pri = mount_test_option(options, "pri=")))
+                return 0;
+
+        pri += 4;
+
+        errno = 0;
+        r = strtoul(pri, &end, 10);
+
+        if (errno != 0)
+                return -errno;
+
+        if (end == pri || (*end != ',' && *end != 0))
+                return -EINVAL;
+
+        return (int) r;
+}
+
+static int mount_load_etc_fstab(Manager *m) {
+        FILE *f;
+        int r;
+        struct mntent* me;
+
+        assert(m);
+
+        errno = 0;
+        if (!(f = setmntent("/etc/fstab", "r")))
+                return -errno;
+
+        while ((me = getmntent(f))) {
+                char *where, *what;
+
+                if (!(what = fstab_node_to_udev_node(me->mnt_fsname))) {
+                        r = -ENOMEM;
+                        goto finish;
+                }
+
+                if (!(where = strdup(me->mnt_dir))) {
+                        free(what);
+                        r = -ENOMEM;
+                        goto finish;
+                }
+
+                if (what[0] == '/')
+                        path_kill_slashes(what);
+
+                if (where[0] == '/')
+                        path_kill_slashes(where);
+
+                if (streq(me->mnt_type, "swap")) {
+                        int pri;
+
+                        if ((pri = mount_find_pri(me->mnt_opts)) < 0)
+                                r = pri;
+                        else
+                                r = swap_add_one(m,
+                                                 what,
+                                                 pri,
+                                                 !!mount_test_option(me->mnt_opts, MNTOPT_NOAUTO),
+                                                 !!mount_test_option(me->mnt_opts, "comment=systemd.swapon"),
+                                                 false);
+                } else
+                        r = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, false, false);
+
+                free(what);
+                free(where);
+
+                if (r < 0)
+                        goto finish;
+        }
+
+        r = 0;
+finish:
+
+        endmntent(f);
+        return r;
+}
+
+static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
+        int r;
+        char *device, *path, *options, *fstype, *d, *p;
+
+        assert(m);
+
+        rewind(m->proc_self_mountinfo);
+
+        for (;;) {
+                int k;
+
+                device = path = options = fstype = d = p = NULL;
+
+                if ((k = fscanf(m->proc_self_mountinfo,
+                                "%*s "       /* (1) mount id */
+                                "%*s "       /* (2) parent id */
+                                "%*s "       /* (3) major:minor */
+                                "%*s "       /* (4) root */
+                                "%ms "       /* (5) mount point */
+                                "%ms"        /* (6) mount options */
+                                "%*[^-]"     /* (7) optional fields */
+                                "- "         /* (8) seperator */
+                                "%ms "       /* (9) file system type */
+                                "%ms"        /* (10) mount source */
+                                "%*[^\n]",   /* some rubbish at the end */
+                                &path,
+                                &options,
+                                &fstype,
+                                &device)) != 4) {
+
+                        if (k == EOF)
+                                break;
+
+                        r = -EBADMSG;
+                        goto finish;
+                }
+
+                if (!(d = cunescape(device)) ||
+                    !(p = cunescape(path))) {
+                        r = -ENOMEM;
+                        goto finish;
+                }
+
+                if ((r = mount_add_one(m, d, p, options, fstype, true, set_flags)) < 0)
+                        goto finish;
+
+                free(device);
+                free(path);
+                free(options);
+                free(fstype);
+                free(d);
+                free(p);
+        }
+
+        r = 0;
+
+finish:
+        free(device);
+        free(path);
+        free(options);
+        free(fstype);
+        free(d);
+        free(p);
+
+        return r;
+}
+
+static void mount_shutdown(Manager *m) {
+        assert(m);
+
+        if (m->proc_self_mountinfo) {
+                fclose(m->proc_self_mountinfo);
+                m->proc_self_mountinfo = NULL;
+        }
+}
+
+static int mount_enumerate(Manager *m) {
+        int r;
+        struct epoll_event ev;
+        assert(m);
+
+        if (!m->proc_self_mountinfo) {
+                if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
+                        return -errno;
+
+                m->mount_watch.type = WATCH_MOUNT;
+                m->mount_watch.fd = fileno(m->proc_self_mountinfo);
+
+                zero(ev);
+                ev.events = EPOLLERR;
+                ev.data.ptr = &m->mount_watch;
+
+                if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
+                        return -errno;
+        }
+
+        if ((r = mount_load_etc_fstab(m)) < 0)
+                goto fail;
+
+        if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
+                goto fail;
+
+        return 0;
+
+fail:
+        mount_shutdown(m);
+        return r;
+}
+
+void mount_fd_event(Manager *m, int events) {
+        Meta *meta;
+        int r;
+
+        assert(m);
+        assert(events == EPOLLERR);
+
+        /* The manager calls this for every fd event happening on the
+         * /proc/self/mountinfo file, which informs us about mounting
+         * table changes */
+
+        if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
+                log_error("Failed to reread /proc/self/mountinfo: %s", strerror(errno));
+
+                /* Reset flags, just in case, for later calls */
+                LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
+                        Mount *mount = (Mount*) meta;
+
+                        mount->is_mounted = mount->just_mounted = mount->just_changed = false;
+                }
+
+                return;
+        }
+
+        manager_dispatch_load_queue(m);
+
+        LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
+                Mount *mount = (Mount*) meta;
+
+                if (!mount->is_mounted) {
+                        /* This has just been unmounted. */
+
+                        mount->from_proc_self_mountinfo = false;
+
+                        switch (mount->state) {
+
+                        case MOUNT_MOUNTED:
+                                mount_enter_dead(mount, true);
+                                break;
+
+                        default:
+                                mount_set_state(mount, mount->state);
+                                break;
+
+                        }
+
+                } else if (mount->just_mounted || mount->just_changed) {
+
+                        /* New or changed entrymount */
+
+                        switch (mount->state) {
+
+                        case MOUNT_DEAD:
+                        case MOUNT_MAINTAINANCE:
+                                mount_enter_mounted(mount, true);
+                                break;
+
+                        case MOUNT_MOUNTING:
+                                mount_enter_mounting_done(mount);
+                                break;
+
+                        default:
+                                /* Nothing really changed, but let's
+                                 * issue an notification call
+                                 * nonetheless, in case somebody is
+                                 * waiting for this. (e.g. file system
+                                 * ro/rw remounts.) */
+                                mount_set_state(mount, mount->state);
+                                break;
+                        }
+                }
+
+                /* Reset the flags for later calls */
+                mount->is_mounted = mount->just_mounted = mount->just_changed = false;
+        }
+}
+
+int mount_path_is_mounted(Manager *m, const char* path) {
+        char *t;
+        int r;
+
+        assert(m);
+        assert(path);
+
+        if (path[0] != '/')
+                return 1;
+
+        if (!(t = strdup(path)))
+                return -ENOMEM;
+
+        path_kill_slashes(t);
+
+        for (;;) {
+                char *e, *slash;
+                Unit *u;
+
+                if (!(e = unit_name_from_path(t, ".mount"))) {
+                        r = -ENOMEM;
+                        goto finish;
+                }
+
+                u = manager_get_unit(m, e);
+                free(e);
+
+                if (u &&
+                    (MOUNT(u)->from_etc_fstab || MOUNT(u)->from_fragment) &&
+                    MOUNT(u)->state != MOUNT_MOUNTED) {
+                        r = 0;
+                        goto finish;
+                }
+
+                assert_se(slash = strrchr(t, '/'));
+
+                if (slash == t) {
+                        r = 1;
+                        goto finish;
+                }
+
+                *slash = 0;
+        }
+
+        r = 1;
+
+finish:
+        free(t);
+        return r;
+}
+
+static const char* const mount_state_table[_MOUNT_STATE_MAX] = {
+        [MOUNT_DEAD] = "dead",
+        [MOUNT_MOUNTING] = "mounting",
+        [MOUNT_MOUNTING_DONE] = "mounting-done",
+        [MOUNT_MOUNTED] = "mounted",
+        [MOUNT_REMOUNTING] = "remounting",
+        [MOUNT_UNMOUNTING] = "unmounting",
+        [MOUNT_MOUNTING_SIGTERM] = "mounting-sigterm",
+        [MOUNT_MOUNTING_SIGKILL] = "mounting-sigkill",
+        [MOUNT_REMOUNTING_SIGTERM] = "remounting-sigterm",
+        [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill",
+        [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm",
+        [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill",
+        [MOUNT_MAINTAINANCE] = "maintainance"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState);
+
+static const char* const mount_exec_command_table[_MOUNT_EXEC_COMMAND_MAX] = {
+        [MOUNT_EXEC_MOUNT] = "ExecMount",
+        [MOUNT_EXEC_UNMOUNT] = "ExecUnmount",
+        [MOUNT_EXEC_REMOUNT] = "ExecRemount",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(mount_exec_command, MountExecCommand);
+
+const UnitVTable mount_vtable = {
+        .suffix = ".mount",
+
+        .no_alias = true,
+        .no_instances = true,
+        .no_isolate = true,
+
+        .init = mount_init,
+        .load = mount_load,
+        .done = mount_done,
+
+        .coldplug = mount_coldplug,
+
+        .dump = mount_dump,
+
+        .start = mount_start,
+        .stop = mount_stop,
+        .reload = mount_reload,
+
+        .serialize = mount_serialize,
+        .deserialize_item = mount_deserialize_item,
+
+        .active_state = mount_active_state,
+        .sub_state_to_string = mount_sub_state_to_string,
+
+        .check_gc = mount_check_gc,
+
+        .sigchld_event = mount_sigchld_event,
+        .timer_event = mount_timer_event,
+
+        .bus_message_handler = bus_mount_message_handler,
+
+        .enumerate = mount_enumerate,
+        .shutdown = mount_shutdown
+};