1950 lines
60 KiB
C
1950 lines
60 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <stdio.h>
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#include <mntent.h>
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#include <sys/epoll.h>
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#include <signal.h>
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#include "unit.h"
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#include "mount.h"
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#include "load-fragment.h"
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#include "load-dropin.h"
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#include "log.h"
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#include "strv.h"
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#include "mkdir.h"
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#include "path-util.h"
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#include "mount-setup.h"
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#include "unit-name.h"
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#include "dbus-mount.h"
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#include "special.h"
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#include "bus-errors.h"
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#include "exit-status.h"
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#include "def.h"
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static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = {
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[MOUNT_DEAD] = UNIT_INACTIVE,
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[MOUNT_MOUNTING] = UNIT_ACTIVATING,
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[MOUNT_MOUNTING_DONE] = UNIT_ACTIVE,
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[MOUNT_MOUNTED] = UNIT_ACTIVE,
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[MOUNT_REMOUNTING] = UNIT_RELOADING,
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[MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
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[MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
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[MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
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[MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
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[MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
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[MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
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[MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
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[MOUNT_FAILED] = UNIT_FAILED
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};
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static void mount_init(Unit *u) {
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Mount *m = MOUNT(u);
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assert(u);
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assert(u->load_state == UNIT_STUB);
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m->timeout_usec = DEFAULT_TIMEOUT_USEC;
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m->directory_mode = 0755;
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exec_context_init(&m->exec_context);
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/* The stdio/kmsg bridge socket is on /, in order to avoid a
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* dep loop, don't use kmsg logging for -.mount */
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if (!unit_has_name(u, "-.mount")) {
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m->exec_context.std_output = u->manager->default_std_output;
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m->exec_context.std_error = u->manager->default_std_error;
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}
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/* We need to make sure that /bin/mount is always called in
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* the same process group as us, so that the autofs kernel
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* side doesn't send us another mount request while we are
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* already trying to comply its last one. */
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m->exec_context.same_pgrp = true;
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m->timer_watch.type = WATCH_INVALID;
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m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
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UNIT(m)->ignore_on_isolate = true;
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}
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static void mount_unwatch_control_pid(Mount *m) {
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assert(m);
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if (m->control_pid <= 0)
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return;
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unit_unwatch_pid(UNIT(m), m->control_pid);
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m->control_pid = 0;
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}
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static void mount_parameters_done(MountParameters *p) {
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assert(p);
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free(p->what);
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free(p->options);
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free(p->fstype);
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p->what = p->options = p->fstype = NULL;
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}
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static void mount_done(Unit *u) {
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Mount *m = MOUNT(u);
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assert(m);
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free(m->where);
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m->where = NULL;
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mount_parameters_done(&m->parameters_etc_fstab);
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mount_parameters_done(&m->parameters_proc_self_mountinfo);
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mount_parameters_done(&m->parameters_fragment);
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exec_context_done(&m->exec_context);
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exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
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m->control_command = NULL;
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mount_unwatch_control_pid(m);
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unit_unwatch_timer(u, &m->timer_watch);
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}
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static MountParameters* get_mount_parameters_configured(Mount *m) {
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assert(m);
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if (m->from_fragment)
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return &m->parameters_fragment;
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else if (m->from_etc_fstab)
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return &m->parameters_etc_fstab;
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return NULL;
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}
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static MountParameters* get_mount_parameters(Mount *m) {
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assert(m);
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if (m->from_proc_self_mountinfo)
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return &m->parameters_proc_self_mountinfo;
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return get_mount_parameters_configured(m);
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}
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static int mount_add_mount_links(Mount *m) {
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Unit *other;
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int r;
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MountParameters *pm;
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assert(m);
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pm = get_mount_parameters_configured(m);
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/* Adds in links to other mount points that might lie below or
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* above us in the hierarchy */
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LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_MOUNT]) {
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Mount *n = MOUNT(other);
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MountParameters *pn;
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if (n == m)
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continue;
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if (UNIT(n)->load_state != UNIT_LOADED)
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continue;
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pn = get_mount_parameters_configured(n);
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if (path_startswith(m->where, n->where)) {
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if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
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return r;
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if (pn)
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if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
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return r;
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} else if (path_startswith(n->where, m->where)) {
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if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
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return r;
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if (pm)
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if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
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return r;
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} else if (pm && pm->what && path_startswith(pm->what, n->where)) {
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if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0)
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return r;
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if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0)
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return r;
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} else if (pn && pn->what && path_startswith(pn->what, m->where)) {
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if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0)
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return r;
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if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0)
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return r;
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}
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}
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return 0;
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}
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static int mount_add_swap_links(Mount *m) {
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Unit *other;
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int r;
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assert(m);
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LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_SWAP])
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if ((r = swap_add_one_mount_link(SWAP(other), m)) < 0)
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return r;
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return 0;
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}
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static int mount_add_path_links(Mount *m) {
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Unit *other;
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int r;
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assert(m);
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LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_PATH])
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if ((r = path_add_one_mount_link(PATH(other), m)) < 0)
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return r;
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return 0;
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}
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static int mount_add_automount_links(Mount *m) {
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Unit *other;
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int r;
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assert(m);
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LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_AUTOMOUNT])
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if ((r = automount_add_one_mount_link(AUTOMOUNT(other), m)) < 0)
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return r;
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return 0;
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}
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static int mount_add_socket_links(Mount *m) {
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Unit *other;
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int r;
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assert(m);
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LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_SOCKET])
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if ((r = socket_add_one_mount_link(SOCKET(other), m)) < 0)
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return r;
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return 0;
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}
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static int mount_add_requires_mounts_links(Mount *m) {
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Unit *other;
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int r;
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assert(m);
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LIST_FOREACH(has_requires_mounts_for, other, UNIT(m)->manager->has_requires_mounts_for) {
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r = unit_add_one_mount_link(other, m);
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if (r < 0)
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return r;
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}
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return 0;
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}
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static char* mount_test_option(const char *haystack, const char *needle) {
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struct mntent me;
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assert(needle);
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/* Like glibc's hasmntopt(), but works on a string, not a
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* struct mntent */
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if (!haystack)
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return NULL;
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zero(me);
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me.mnt_opts = (char*) haystack;
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return hasmntopt(&me, needle);
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}
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static bool mount_is_network(MountParameters *p) {
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assert(p);
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if (mount_test_option(p->options, "_netdev"))
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return true;
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if (p->fstype && fstype_is_network(p->fstype))
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return true;
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return false;
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}
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static bool mount_is_bind(MountParameters *p) {
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assert(p);
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if (mount_test_option(p->options, "bind"))
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return true;
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if (p->fstype && streq(p->fstype, "bind"))
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return true;
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return false;
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}
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static bool needs_quota(MountParameters *p) {
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assert(p);
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if (mount_is_network(p))
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return false;
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if (mount_is_bind(p))
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return false;
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return mount_test_option(p->options, "usrquota") ||
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mount_test_option(p->options, "grpquota") ||
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mount_test_option(p->options, "quota") ||
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mount_test_option(p->options, "usrjquota") ||
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mount_test_option(p->options, "grpjquota");
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}
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static int mount_add_fstab_links(Mount *m) {
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const char *target, *after, *tu_wants = NULL;
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MountParameters *p;
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Unit *tu;
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int r;
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bool noauto, nofail, automount;
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assert(m);
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if (UNIT(m)->manager->running_as != MANAGER_SYSTEM)
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return 0;
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if (!(p = get_mount_parameters_configured(m)))
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return 0;
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if (p != &m->parameters_etc_fstab)
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return 0;
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noauto = !!mount_test_option(p->options, "noauto");
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nofail = !!mount_test_option(p->options, "nofail");
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automount =
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mount_test_option(p->options, "comment=systemd.automount") ||
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mount_test_option(p->options, "x-systemd-automount");
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if (mount_is_network(p)) {
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target = SPECIAL_REMOTE_FS_TARGET;
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after = tu_wants = SPECIAL_REMOTE_FS_PRE_TARGET;
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} else {
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target = SPECIAL_LOCAL_FS_TARGET;
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after = SPECIAL_LOCAL_FS_PRE_TARGET;
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}
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r = manager_load_unit(UNIT(m)->manager, target, NULL, NULL, &tu);
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if (r < 0)
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return r;
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if (tu_wants) {
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r = unit_add_dependency_by_name(tu, UNIT_WANTS, tu_wants, NULL, true);
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if (r < 0)
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return r;
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}
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if (after) {
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r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true);
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if (r < 0)
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return r;
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}
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if (automount) {
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Unit *am;
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if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0)
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return r;
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/* If auto is configured as well also pull in the
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* mount right-away, but don't rely on it. */
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if (!noauto) /* automount + auto */
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if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0)
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return r;
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/* Install automount unit */
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if (!nofail) /* automount + fail */
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return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, am, true);
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else /* automount + nofail */
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return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, am, true);
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} else if (!noauto) {
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/* Automatically add mount points that aren't natively
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* configured to local-fs.target */
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if (!nofail) /* auto + fail */
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return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true);
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else /* auto + nofail */
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return unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true);
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}
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return 0;
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}
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static int mount_add_device_links(Mount *m) {
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MountParameters *p;
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int r;
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assert(m);
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if (!(p = get_mount_parameters_configured(m)))
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return 0;
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if (!p->what)
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return 0;
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if (!mount_is_bind(p) &&
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!path_equal(m->where, "/") &&
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p == &m->parameters_etc_fstab) {
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bool nofail, noauto;
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noauto = !!mount_test_option(p->options, "noauto");
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nofail = !!mount_test_option(p->options, "nofail");
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if ((r = unit_add_node_link(UNIT(m), p->what,
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!noauto && nofail &&
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UNIT(m)->manager->running_as == MANAGER_SYSTEM)) < 0)
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return r;
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}
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if (p->passno > 0 &&
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!mount_is_bind(p) &&
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UNIT(m)->manager->running_as == MANAGER_SYSTEM &&
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!path_equal(m->where, "/")) {
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char *name;
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Unit *fsck;
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/* Let's add in the fsck service */
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/* aka SPECIAL_FSCK_SERVICE */
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if (!(name = unit_name_from_path_instance("fsck", p->what, ".service")))
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return -ENOMEM;
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if ((r = manager_load_unit_prepare(UNIT(m)->manager, name, NULL, NULL, &fsck)) < 0) {
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log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
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free(name);
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return r;
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}
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free(name);
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SERVICE(fsck)->fsck_passno = p->passno;
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if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0)
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return r;
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}
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return 0;
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}
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static int mount_add_default_dependencies(Mount *m) {
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int r;
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MountParameters *p;
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assert(m);
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if (UNIT(m)->manager->running_as != MANAGER_SYSTEM)
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return 0;
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p = get_mount_parameters_configured(m);
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if (p && needs_quota(p)) {
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if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 ||
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(r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0)
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return r;
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}
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if (!path_equal(m->where, "/"))
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if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0)
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return r;
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return 0;
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}
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static int mount_fix_timeouts(Mount *m) {
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MountParameters *p;
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const char *timeout = NULL;
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Unit *other;
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Iterator i;
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usec_t u;
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char *t;
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int r;
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assert(m);
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if (!(p = get_mount_parameters_configured(m)))
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return 0;
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/* Allow configuration how long we wait for a device that
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* backs a mount point to show up. This is useful to support
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* endless device timeouts for devices that show up only after
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* user input, like crypto devices. */
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if ((timeout = mount_test_option(p->options, "comment=systemd.device-timeout")))
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timeout += 31;
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else if ((timeout = mount_test_option(p->options, "x-systemd-device-timeout")))
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timeout += 25;
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else
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return 0;
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t = strndup(timeout, strcspn(timeout, ",;" WHITESPACE));
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if (!t)
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return -ENOMEM;
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r = parse_usec(t, &u);
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free(t);
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if (r < 0) {
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log_warning("Failed to parse timeout for %s, ignoring: %s", m->where, timeout);
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return r;
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}
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|
|
SET_FOREACH(other, UNIT(m)->dependencies[UNIT_AFTER], i) {
|
|
if (other->type != UNIT_DEVICE)
|
|
continue;
|
|
|
|
other->job_timeout = u;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mount_verify(Mount *m) {
|
|
bool b;
|
|
char *e;
|
|
assert(m);
|
|
|
|
if (UNIT(m)->load_state != UNIT_LOADED)
|
|
return 0;
|
|
|
|
if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo)
|
|
return -ENOENT;
|
|
|
|
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)->id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (mount_point_is_api(m->where) || mount_point_ignore(m->where)) {
|
|
log_error("Cannot create mount unit for API file system %s. Refusing.", m->where);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (UNIT(m)->fragment_path && !m->parameters_fragment.what) {
|
|
log_error("%s's What setting is missing. Refusing.", UNIT(m)->id);
|
|
return -EBADMSG;
|
|
}
|
|
|
|
if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) {
|
|
log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(m)->id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mount_load(Unit *u) {
|
|
Mount *m = MOUNT(u);
|
|
int r;
|
|
|
|
assert(u);
|
|
assert(u->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->load_state == UNIT_LOADED) {
|
|
if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0)
|
|
return r;
|
|
|
|
if (UNIT(m)->fragment_path)
|
|
m->from_fragment = true;
|
|
else if (m->from_etc_fstab)
|
|
/* We always add several default dependencies to fstab mounts,
|
|
* but we do not want the implicit complementing of Wants= with After=
|
|
* in the target unit that this mount unit will be hooked into. */
|
|
UNIT(m)->default_dependencies = false;
|
|
|
|
if (!m->where)
|
|
if (!(m->where = unit_name_to_path(u->id)))
|
|
return -ENOMEM;
|
|
|
|
path_kill_slashes(m->where);
|
|
|
|
if (!UNIT(m)->description)
|
|
if ((r = unit_set_description(u, m->where)) < 0)
|
|
return r;
|
|
|
|
if ((r = mount_add_device_links(m)) < 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_path_links(m)) < 0)
|
|
return r;
|
|
|
|
r = mount_add_requires_mounts_links(m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if ((r = mount_add_automount_links(m)) < 0)
|
|
return r;
|
|
|
|
if ((r = mount_add_fstab_links(m)) < 0)
|
|
return r;
|
|
|
|
if (UNIT(m)->default_dependencies || m->from_etc_fstab)
|
|
if ((r = mount_add_default_dependencies(m)) < 0)
|
|
return r;
|
|
|
|
if ((r = unit_add_default_cgroups(u)) < 0)
|
|
return r;
|
|
|
|
mount_fix_timeouts(m);
|
|
}
|
|
|
|
return mount_verify(m);
|
|
}
|
|
|
|
static int mount_notify_automount(Mount *m, int status) {
|
|
Unit *p;
|
|
int r;
|
|
Iterator i;
|
|
|
|
assert(m);
|
|
|
|
SET_FOREACH(p, UNIT(m)->dependencies[UNIT_TRIGGERED_BY], i)
|
|
if (p->type == UNIT_AUTOMOUNT) {
|
|
r = automount_send_ready(AUTOMOUNT(p), status);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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_FAILED)
|
|
mount_notify_automount(m, -ENODEV);
|
|
|
|
if (state != old_state)
|
|
log_debug("%s changed %s -> %s",
|
|
UNIT(m)->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], m->reload_result == MOUNT_SUCCESS);
|
|
m->reload_result = MOUNT_SUCCESS;
|
|
}
|
|
|
|
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);
|
|
|
|
p = get_mount_parameters(m);
|
|
|
|
fprintf(f,
|
|
"%sMount State: %s\n"
|
|
"%sResult: %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"
|
|
"%sDirectoryMode: %04o\n",
|
|
prefix, mount_state_to_string(m->state),
|
|
prefix, mount_result_to_string(m->result),
|
|
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, m->directory_mode);
|
|
|
|
if (m->control_pid > 0)
|
|
fprintf(f,
|
|
"%sControl PID: %lu\n",
|
|
prefix, (unsigned 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,
|
|
UNIT(m)->manager->environment,
|
|
true,
|
|
true,
|
|
true,
|
|
UNIT(m)->manager->confirm_spawn,
|
|
UNIT(m)->cgroup_bondings,
|
|
UNIT(m)->cgroup_attributes,
|
|
NULL,
|
|
NULL,
|
|
&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, MountResult f) {
|
|
assert(m);
|
|
|
|
if (f != MOUNT_SUCCESS)
|
|
m->result = f;
|
|
|
|
mount_set_state(m, m->result != MOUNT_SUCCESS ? MOUNT_FAILED : MOUNT_DEAD);
|
|
}
|
|
|
|
static void mount_enter_mounted(Mount *m, MountResult f) {
|
|
assert(m);
|
|
|
|
if (f != MOUNT_SUCCESS)
|
|
m->result = f;
|
|
|
|
mount_set_state(m, MOUNT_MOUNTED);
|
|
}
|
|
|
|
static void mount_enter_signal(Mount *m, MountState state, MountResult f) {
|
|
int r;
|
|
Set *pid_set = NULL;
|
|
bool wait_for_exit = false;
|
|
|
|
assert(m);
|
|
|
|
if (f != MOUNT_SUCCESS)
|
|
m->result = f;
|
|
|
|
if (m->exec_context.kill_mode != KILL_NONE) {
|
|
int sig = (state == MOUNT_MOUNTING_SIGTERM ||
|
|
state == MOUNT_UNMOUNTING_SIGTERM ||
|
|
state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL;
|
|
|
|
if (m->control_pid > 0) {
|
|
if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH)
|
|
|
|
log_warning("Failed to kill control process %li: %m", (long) m->control_pid);
|
|
else
|
|
wait_for_exit = true;
|
|
}
|
|
|
|
if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) {
|
|
|
|
if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
|
|
r = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
/* Exclude the control pid from being killed via the cgroup */
|
|
if (m->control_pid > 0)
|
|
if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0)
|
|
goto fail;
|
|
|
|
r = cgroup_bonding_kill_list(UNIT(m)->cgroup_bondings, sig, true, false, pid_set, NULL);
|
|
if (r < 0) {
|
|
if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
|
|
log_warning("Failed to kill control group: %s", strerror(-r));
|
|
} else if (r > 0)
|
|
wait_for_exit = true;
|
|
|
|
set_free(pid_set);
|
|
pid_set = NULL;
|
|
}
|
|
}
|
|
|
|
if (wait_for_exit) {
|
|
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, MOUNT_SUCCESS);
|
|
else
|
|
mount_enter_dead(m, MOUNT_SUCCESS);
|
|
|
|
return;
|
|
|
|
fail:
|
|
log_warning("%s failed to kill processes: %s", UNIT(m)->id, strerror(-r));
|
|
|
|
if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL)
|
|
mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES);
|
|
else
|
|
mount_enter_dead(m, MOUNT_FAILURE_RESOURCES);
|
|
|
|
if (pid_set)
|
|
set_free(pid_set);
|
|
}
|
|
|
|
static void mount_enter_unmounting(Mount *m) {
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
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' task: %s", UNIT(m)->id, strerror(-r));
|
|
mount_enter_mounted(m, MOUNT_FAILURE_RESOURCES);
|
|
}
|
|
|
|
static void mount_enter_mounting(Mount *m) {
|
|
int r;
|
|
MountParameters *p;
|
|
|
|
assert(m);
|
|
|
|
m->control_command_id = MOUNT_EXEC_MOUNT;
|
|
m->control_command = m->exec_command + MOUNT_EXEC_MOUNT;
|
|
|
|
mkdir_p(m->where, m->directory_mode);
|
|
|
|
/* Create the source directory for bind-mounts if needed */
|
|
p = get_mount_parameters_configured(m);
|
|
if (p && mount_is_bind(p))
|
|
mkdir_p(p->what, m->directory_mode);
|
|
|
|
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.fstype : "auto",
|
|
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' task: %s", UNIT(m)->id, strerror(-r));
|
|
mount_enter_dead(m, MOUNT_FAILURE_RESOURCES);
|
|
}
|
|
|
|
static void mount_enter_mounting_done(Mount *m) {
|
|
assert(m);
|
|
|
|
mount_set_state(m, MOUNT_MOUNTING_DONE);
|
|
}
|
|
|
|
static void mount_enter_remounting(Mount *m) {
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
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 ? m->parameters_fragment.fstype : "auto",
|
|
"-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)
|
|
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:
|
|
log_warning("%s failed to run 'remount' task: %s", UNIT(m)->id, strerror(-r));
|
|
m->reload_result = MOUNT_FAILURE_RESOURCES;
|
|
mount_enter_mounted(m, MOUNT_SUCCESS);
|
|
}
|
|
|
|
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 ||
|
|
m->state == MOUNT_MOUNTING_SIGTERM ||
|
|
m->state == MOUNT_MOUNTING_SIGKILL)
|
|
return -EAGAIN;
|
|
|
|
/* Already on it! */
|
|
if (m->state == MOUNT_MOUNTING)
|
|
return 0;
|
|
|
|
assert(m->state == MOUNT_DEAD || m->state == MOUNT_FAILED);
|
|
|
|
m->result = MOUNT_SUCCESS;
|
|
m->reload_result = MOUNT_SUCCESS;
|
|
|
|
mount_enter_mounting(m);
|
|
return 0;
|
|
}
|
|
|
|
static int mount_stop(Unit *u) {
|
|
Mount *m = MOUNT(u);
|
|
|
|
assert(m);
|
|
|
|
/* Already on it */
|
|
if (m->state == MOUNT_UNMOUNTING ||
|
|
m->state == MOUNT_UNMOUNTING_SIGKILL ||
|
|
m->state == MOUNT_UNMOUNTING_SIGTERM ||
|
|
m->state == MOUNT_MOUNTING_SIGTERM ||
|
|
m->state == MOUNT_MOUNTING_SIGKILL)
|
|
return 0;
|
|
|
|
assert(m->state == MOUNT_MOUNTING ||
|
|
m->state == MOUNT_MOUNTING_DONE ||
|
|
m->state == MOUNT_MOUNTED ||
|
|
m->state == MOUNT_REMOUNTING ||
|
|
m->state == MOUNT_REMOUNTING_SIGTERM ||
|
|
m->state == MOUNT_REMOUNTING_SIGKILL);
|
|
|
|
mount_enter_unmounting(m);
|
|
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);
|
|
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, "result", mount_result_to_string(m->result));
|
|
unit_serialize_item(u, f, "reload-result", mount_result_to_string(m->reload_result));
|
|
|
|
if (m->control_pid > 0)
|
|
unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) 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);
|
|
|
|
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, "result")) {
|
|
MountResult f;
|
|
|
|
f = mount_result_from_string(value);
|
|
if (f < 0)
|
|
log_debug("Failed to parse result value %s", value);
|
|
else if (f != MOUNT_SUCCESS)
|
|
m->result = f;
|
|
|
|
} else if (streq(key, "reload-result")) {
|
|
MountResult f;
|
|
|
|
f = mount_result_from_string(value);
|
|
if (f < 0)
|
|
log_debug("Failed to parse reload result value %s", value);
|
|
else if (f != MOUNT_SUCCESS)
|
|
m->reload_result = f;
|
|
|
|
} else if (streq(key, "control-pid")) {
|
|
pid_t pid;
|
|
|
|
if (parse_pid(value, &pid) < 0)
|
|
log_debug("Failed to parse control-pid value %s", value);
|
|
else
|
|
m->control_pid = 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);
|
|
MountResult f;
|
|
|
|
assert(m);
|
|
assert(pid >= 0);
|
|
|
|
if (pid != m->control_pid)
|
|
return;
|
|
|
|
m->control_pid = 0;
|
|
|
|
if (is_clean_exit(code, status))
|
|
f = MOUNT_SUCCESS;
|
|
else if (code == CLD_EXITED)
|
|
f = MOUNT_FAILURE_EXIT_CODE;
|
|
else if (code == CLD_KILLED)
|
|
f = MOUNT_FAILURE_SIGNAL;
|
|
else if (code == CLD_DUMPED)
|
|
f = MOUNT_FAILURE_CORE_DUMP;
|
|
else
|
|
assert_not_reached("Unknown code");
|
|
|
|
if (f != MOUNT_SUCCESS)
|
|
m->result = f;
|
|
|
|
if (m->control_command) {
|
|
exec_status_exit(&m->control_command->exec_status, &m->exec_context, pid, code, status);
|
|
|
|
m->control_command = NULL;
|
|
m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
|
|
}
|
|
|
|
log_full(f == MOUNT_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
|
|
"%s mount process exited, code=%s status=%i", u->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:
|
|
|
|
if (f == MOUNT_SUCCESS)
|
|
mount_enter_mounted(m, f);
|
|
else if (m->from_proc_self_mountinfo)
|
|
mount_enter_mounted(m, f);
|
|
else
|
|
mount_enter_dead(m, f);
|
|
break;
|
|
|
|
case MOUNT_REMOUNTING:
|
|
case MOUNT_REMOUNTING_SIGKILL:
|
|
case MOUNT_REMOUNTING_SIGTERM:
|
|
|
|
m->reload_result = f;
|
|
if (m->from_proc_self_mountinfo)
|
|
mount_enter_mounted(m, MOUNT_SUCCESS);
|
|
else
|
|
mount_enter_dead(m, MOUNT_SUCCESS);
|
|
|
|
break;
|
|
|
|
case MOUNT_UNMOUNTING:
|
|
case MOUNT_UNMOUNTING_SIGKILL:
|
|
case MOUNT_UNMOUNTING_SIGTERM:
|
|
|
|
if (f == MOUNT_SUCCESS)
|
|
mount_enter_dead(m, f);
|
|
else if (m->from_proc_self_mountinfo)
|
|
mount_enter_mounted(m, f);
|
|
else
|
|
mount_enter_dead(m, f);
|
|
break;
|
|
|
|
default:
|
|
assert_not_reached("Uh, control process died at wrong time.");
|
|
}
|
|
|
|
/* Notify clients about changed exit status */
|
|
unit_add_to_dbus_queue(u);
|
|
}
|
|
|
|
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->id);
|
|
mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
|
|
break;
|
|
|
|
case MOUNT_REMOUNTING:
|
|
log_warning("%s remounting timed out. Stopping.", u->id);
|
|
m->reload_result = MOUNT_FAILURE_TIMEOUT;
|
|
mount_enter_mounted(m, MOUNT_SUCCESS);
|
|
break;
|
|
|
|
case MOUNT_UNMOUNTING:
|
|
log_warning("%s unmounting timed out. Stopping.", u->id);
|
|
mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
|
|
break;
|
|
|
|
case MOUNT_MOUNTING_SIGTERM:
|
|
if (m->exec_context.send_sigkill) {
|
|
log_warning("%s mounting timed out. Killing.", u->id);
|
|
mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
|
|
} else {
|
|
log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->id);
|
|
|
|
if (m->from_proc_self_mountinfo)
|
|
mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
|
|
else
|
|
mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
|
|
}
|
|
break;
|
|
|
|
case MOUNT_REMOUNTING_SIGTERM:
|
|
if (m->exec_context.send_sigkill) {
|
|
log_warning("%s remounting timed out. Killing.", u->id);
|
|
mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
|
|
} else {
|
|
log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->id);
|
|
|
|
if (m->from_proc_self_mountinfo)
|
|
mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
|
|
else
|
|
mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
|
|
}
|
|
break;
|
|
|
|
case MOUNT_UNMOUNTING_SIGTERM:
|
|
if (m->exec_context.send_sigkill) {
|
|
log_warning("%s unmounting timed out. Killing.", u->id);
|
|
mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
|
|
} else {
|
|
log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->id);
|
|
|
|
if (m->from_proc_self_mountinfo)
|
|
mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
|
|
else
|
|
mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
|
|
}
|
|
break;
|
|
|
|
case MOUNT_MOUNTING_SIGKILL:
|
|
case MOUNT_REMOUNTING_SIGKILL:
|
|
case MOUNT_UNMOUNTING_SIGKILL:
|
|
log_warning("%s mount process still around after SIGKILL. Ignoring.", u->id);
|
|
|
|
if (m->from_proc_self_mountinfo)
|
|
mount_enter_mounted(m, MOUNT_FAILURE_TIMEOUT);
|
|
else
|
|
mount_enter_dead(m, MOUNT_FAILURE_TIMEOUT);
|
|
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,
|
|
int passno,
|
|
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) || mount_point_ignore(where))
|
|
return 0;
|
|
|
|
if (streq(fstype, "autofs"))
|
|
return 0;
|
|
|
|
/* probably some kind of swap, ignore */
|
|
if (!is_path(where))
|
|
return 0;
|
|
|
|
e = unit_name_from_path(where, ".mount");
|
|
if (!e)
|
|
return -ENOMEM;
|
|
|
|
u = manager_get_unit(m, e);
|
|
if (!u) {
|
|
delete = true;
|
|
|
|
u = unit_new(m, sizeof(Mount));
|
|
if (!u) {
|
|
free(e);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
r = unit_add_name(u, e);
|
|
free(e);
|
|
|
|
if (r < 0)
|
|
goto fail;
|
|
|
|
MOUNT(u)->where = strdup(where);
|
|
if (!MOUNT(u)->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;
|
|
|
|
p->passno = passno;
|
|
|
|
unit_add_to_dbus_queue(u);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
free(w);
|
|
free(o);
|
|
free(f);
|
|
|
|
if (delete && u)
|
|
unit_free(u);
|
|
|
|
return r;
|
|
}
|
|
|
|
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 = 0;
|
|
struct mntent* me;
|
|
|
|
assert(m);
|
|
|
|
errno = 0;
|
|
f = setmntent("/etc/fstab", "r");
|
|
if (!f)
|
|
return errno == ENOENT ? 0 : -errno;
|
|
|
|
while ((me = getmntent(f))) {
|
|
char *where, *what;
|
|
int k;
|
|
|
|
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)
|
|
k = pri;
|
|
else
|
|
k = swap_add_one(m,
|
|
what,
|
|
NULL,
|
|
pri,
|
|
!!mount_test_option(me->mnt_opts, "noauto"),
|
|
!!mount_test_option(me->mnt_opts, "nofail"),
|
|
false);
|
|
} else
|
|
k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false);
|
|
|
|
free(what);
|
|
free(where);
|
|
|
|
if (k < 0)
|
|
r = k;
|
|
}
|
|
|
|
finish:
|
|
|
|
endmntent(f);
|
|
return r;
|
|
}
|
|
|
|
static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
|
|
int r = 0;
|
|
unsigned i;
|
|
char *device, *path, *options, *options2, *fstype, *d, *p, *o;
|
|
|
|
assert(m);
|
|
|
|
rewind(m->proc_self_mountinfo);
|
|
|
|
for (i = 1;; i++) {
|
|
int k;
|
|
|
|
device = path = options = options2 = fstype = d = p = o = 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) separator */
|
|
"%ms " /* (9) file system type */
|
|
"%ms" /* (10) mount source */
|
|
"%ms" /* (11) mount options 2 */
|
|
"%*[^\n]", /* some rubbish at the end */
|
|
&path,
|
|
&options,
|
|
&fstype,
|
|
&device,
|
|
&options2)) != 5) {
|
|
|
|
if (k == EOF)
|
|
break;
|
|
|
|
log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
|
|
goto clean_up;
|
|
}
|
|
|
|
if (asprintf(&o, "%s,%s", options, options2) < 0) {
|
|
r = -ENOMEM;
|
|
goto finish;
|
|
}
|
|
|
|
if (!(d = cunescape(device)) ||
|
|
!(p = cunescape(path))) {
|
|
r = -ENOMEM;
|
|
goto finish;
|
|
}
|
|
|
|
if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0)
|
|
r = k;
|
|
|
|
clean_up:
|
|
free(device);
|
|
free(path);
|
|
free(options);
|
|
free(options2);
|
|
free(fstype);
|
|
free(d);
|
|
free(p);
|
|
free(o);
|
|
}
|
|
|
|
finish:
|
|
free(device);
|
|
free(path);
|
|
free(options);
|
|
free(options2);
|
|
free(fstype);
|
|
free(d);
|
|
free(p);
|
|
free(o);
|
|
|
|
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 = EPOLLPRI;
|
|
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) {
|
|
Unit *u;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(events & EPOLLPRI);
|
|
|
|
/* 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(-r));
|
|
|
|
/* Reset flags, just in case, for later calls */
|
|
LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
|
|
Mount *mount = MOUNT(u);
|
|
|
|
mount->is_mounted = mount->just_mounted = mount->just_changed = false;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
manager_dispatch_load_queue(m);
|
|
|
|
LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_MOUNT]) {
|
|
Mount *mount = MOUNT(u);
|
|
|
|
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, MOUNT_SUCCESS);
|
|
break;
|
|
|
|
default:
|
|
mount_set_state(mount, mount->state);
|
|
break;
|
|
|
|
}
|
|
|
|
} else if (mount->just_mounted || mount->just_changed) {
|
|
|
|
/* New or changed mount entry */
|
|
|
|
switch (mount->state) {
|
|
|
|
case MOUNT_DEAD:
|
|
case MOUNT_FAILED:
|
|
mount_enter_mounted(mount, MOUNT_SUCCESS);
|
|
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;
|
|
}
|
|
}
|
|
|
|
static void mount_reset_failed(Unit *u) {
|
|
Mount *m = MOUNT(u);
|
|
|
|
assert(m);
|
|
|
|
if (m->state == MOUNT_FAILED)
|
|
mount_set_state(m, MOUNT_DEAD);
|
|
|
|
m->result = MOUNT_SUCCESS;
|
|
m->reload_result = MOUNT_SUCCESS;
|
|
}
|
|
|
|
static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
|
|
Mount *m = MOUNT(u);
|
|
int r = 0;
|
|
Set *pid_set = NULL;
|
|
|
|
assert(m);
|
|
|
|
if (who == KILL_MAIN) {
|
|
dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes");
|
|
return -ESRCH;
|
|
}
|
|
|
|
if (m->control_pid <= 0 && who == KILL_CONTROL) {
|
|
dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
|
|
return -ESRCH;
|
|
}
|
|
|
|
if (who == KILL_CONTROL || who == KILL_ALL)
|
|
if (m->control_pid > 0)
|
|
if (kill(m->control_pid, signo) < 0)
|
|
r = -errno;
|
|
|
|
if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
|
|
int q;
|
|
|
|
if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
|
|
return -ENOMEM;
|
|
|
|
/* Exclude the control pid from being killed via the cgroup */
|
|
if (m->control_pid > 0)
|
|
if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) {
|
|
r = q;
|
|
goto finish;
|
|
}
|
|
|
|
q = cgroup_bonding_kill_list(UNIT(m)->cgroup_bondings, signo, false, false, pid_set, NULL);
|
|
if (q < 0)
|
|
if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
|
|
r = q;
|
|
}
|
|
|
|
finish:
|
|
if (pid_set)
|
|
set_free(pid_set);
|
|
|
|
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_FAILED] = "failed"
|
|
};
|
|
|
|
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);
|
|
|
|
static const char* const mount_result_table[_MOUNT_RESULT_MAX] = {
|
|
[MOUNT_SUCCESS] = "success",
|
|
[MOUNT_FAILURE_RESOURCES] = "resources",
|
|
[MOUNT_FAILURE_TIMEOUT] = "timeout",
|
|
[MOUNT_FAILURE_EXIT_CODE] = "exit-code",
|
|
[MOUNT_FAILURE_SIGNAL] = "signal",
|
|
[MOUNT_FAILURE_CORE_DUMP] = "core-dump"
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(mount_result, MountResult);
|
|
|
|
const UnitVTable mount_vtable = {
|
|
.suffix = ".mount",
|
|
.object_size = sizeof(Mount),
|
|
.sections =
|
|
"Unit\0"
|
|
"Mount\0"
|
|
"Install\0",
|
|
|
|
.no_alias = true,
|
|
.no_instances = true,
|
|
.show_status = 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,
|
|
|
|
.kill = mount_kill,
|
|
|
|
.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,
|
|
|
|
.reset_failed = mount_reset_failed,
|
|
|
|
.bus_interface = "org.freedesktop.systemd1.Mount",
|
|
.bus_message_handler = bus_mount_message_handler,
|
|
.bus_invalidating_properties = bus_mount_invalidating_properties,
|
|
|
|
.enumerate = mount_enumerate,
|
|
.shutdown = mount_shutdown
|
|
};
|