+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- 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 Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <errno.h>
-#include <stdio.h>
-#include <sys/epoll.h>
-#include <signal.h>
-#include <libmount.h>
-#include <sys/inotify.h>
-
-#include "manager.h"
-#include "unit.h"
-#include "mount.h"
-#include "log.h"
-#include "sd-messages.h"
-#include "strv.h"
-#include "mkdir.h"
-#include "path-util.h"
-#include "mount-setup.h"
-#include "unit-name.h"
-#include "dbus-mount.h"
-#include "special.h"
-#include "exit-status.h"
-#include "fstab-util.h"
-
-#define RETRY_UMOUNT_MAX 32
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(struct libmnt_table*, mnt_free_table);
-DEFINE_TRIVIAL_CLEANUP_FUNC(struct libmnt_iter*, mnt_free_iter);
-
-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_RELOADING,
- [MOUNT_UNMOUNTING] = UNIT_DEACTIVATING,
- [MOUNT_MOUNTING_SIGTERM] = UNIT_DEACTIVATING,
- [MOUNT_MOUNTING_SIGKILL] = UNIT_DEACTIVATING,
- [MOUNT_REMOUNTING_SIGTERM] = UNIT_RELOADING,
- [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING,
- [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING,
- [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING,
- [MOUNT_FAILED] = UNIT_FAILED
-};
-
-static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
-static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata);
-
-static bool mount_needs_network(const char *options, const char *fstype) {
- if (fstab_test_option(options, "_netdev\0"))
- return true;
-
- if (fstype && fstype_is_network(fstype))
- return true;
-
- return false;
-}
-
-static bool mount_is_network(const MountParameters *p) {
- assert(p);
-
- return mount_needs_network(p->options, p->fstype);
-}
-
-static bool mount_is_bind(const MountParameters *p) {
- assert(p);
-
- if (fstab_test_option(p->options, "bind\0" "rbind\0"))
- return true;
-
- if (p->fstype && STR_IN_SET(p->fstype, "bind", "rbind"))
- return true;
-
- return false;
-}
-
-static bool mount_is_auto(const MountParameters *p) {
- assert(p);
-
- return !fstab_test_option(p->options, "noauto\0");
-}
-
-static bool needs_quota(const MountParameters *p) {
- assert(p);
-
- /* Quotas are not enabled on network filesystems,
- * but we want them, for example, on storage connected via iscsi */
- if (p->fstype && fstype_is_network(p->fstype))
- return false;
-
- if (mount_is_bind(p))
- return false;
-
- return fstab_test_option(p->options,
- "usrquota\0" "grpquota\0" "quota\0" "usrjquota\0" "grpjquota\0");
-}
-
-static void mount_init(Unit *u) {
- Mount *m = MOUNT(u);
-
- assert(u);
- assert(u->load_state == UNIT_STUB);
-
- m->timeout_usec = u->manager->default_timeout_start_usec;
- m->directory_mode = 0755;
-
- if (unit_has_name(u, "-.mount")) {
- /* Don't allow start/stop for root directory */
- u->refuse_manual_start = true;
- u->refuse_manual_stop = true;
- } else {
- /* The stdio/kmsg bridge socket is on /, in order to avoid a
- * dep loop, don't use kmsg logging for -.mount */
- m->exec_context.std_output = u->manager->default_std_output;
- m->exec_context.std_error = u->manager->default_std_error;
- }
-
- /* 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.same_pgrp = true;
-
- m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID;
-
- u->ignore_on_isolate = true;
-}
-
-static int mount_arm_timer(Mount *m) {
- int r;
-
- assert(m);
-
- if (m->timeout_usec <= 0) {
- m->timer_event_source = sd_event_source_unref(m->timer_event_source);
- return 0;
- }
-
- if (m->timer_event_source) {
- r = sd_event_source_set_time(m->timer_event_source, now(CLOCK_MONOTONIC) + m->timeout_usec);
- if (r < 0)
- return r;
-
- return sd_event_source_set_enabled(m->timer_event_source, SD_EVENT_ONESHOT);
- }
-
- return sd_event_add_time(
- UNIT(m)->manager->event,
- &m->timer_event_source,
- CLOCK_MONOTONIC,
- now(CLOCK_MONOTONIC) + m->timeout_usec, 0,
- mount_dispatch_timer, m);
-}
-
-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_proc_self_mountinfo);
- mount_parameters_done(&m->parameters_fragment);
-
- m->exec_runtime = exec_runtime_unref(m->exec_runtime);
- exec_command_done_array(m->exec_command, _MOUNT_EXEC_COMMAND_MAX);
- m->control_command = NULL;
-
- mount_unwatch_control_pid(m);
-
- m->timer_event_source = sd_event_source_unref(m->timer_event_source);
-}
-
-_pure_ static MountParameters* get_mount_parameters_fragment(Mount *m) {
- assert(m);
-
- if (m->from_fragment)
- return &m->parameters_fragment;
-
- return NULL;
-}
-
-_pure_ static MountParameters* get_mount_parameters(Mount *m) {
- assert(m);
-
- if (m->from_proc_self_mountinfo)
- return &m->parameters_proc_self_mountinfo;
-
- return get_mount_parameters_fragment(m);
-}
-
-static int mount_add_mount_links(Mount *m) {
- _cleanup_free_ char *parent = NULL;
- MountParameters *pm;
- Unit *other;
- Iterator i;
- Set *s;
- int r;
-
- assert(m);
-
- if (!path_equal(m->where, "/")) {
- /* Adds in links to other mount points that might lie further
- * up in the hierarchy */
- r = path_get_parent(m->where, &parent);
- if (r < 0)
- return r;
-
- r = unit_require_mounts_for(UNIT(m), parent);
- if (r < 0)
- return r;
- }
-
- /* Adds in links to other mount points that might be needed
- * for the source path (if this is a bind mount) to be
- * available. */
- pm = get_mount_parameters_fragment(m);
- if (pm && pm->what &&
- path_is_absolute(pm->what) &&
- !mount_is_network(pm)) {
-
- r = unit_require_mounts_for(UNIT(m), pm->what);
- if (r < 0)
- return r;
- }
-
- /* Adds in links to other units that use this path or paths
- * further down in the hierarchy */
- s = manager_get_units_requiring_mounts_for(UNIT(m)->manager, m->where);
- SET_FOREACH(other, s, i) {
-
- if (other->load_state != UNIT_LOADED)
- continue;
-
- if (other == UNIT(m))
- continue;
-
- r = unit_add_dependency(other, UNIT_AFTER, UNIT(m), true);
- if (r < 0)
- return r;
-
- if (UNIT(m)->fragment_path) {
- /* If we have fragment configuration, then make this dependency required */
- r = unit_add_dependency(other, UNIT_REQUIRES, UNIT(m), true);
- if (r < 0)
- return r;
- }
- }
-
- return 0;
-}
-
-static int mount_add_device_links(Mount *m) {
- MountParameters *p;
- bool device_wants_mount = false;
- int r;
-
- assert(m);
-
- p = get_mount_parameters(m);
- if (!p)
- return 0;
-
- if (!p->what)
- return 0;
-
- if (mount_is_bind(p))
- return 0;
-
- if (!is_device_path(p->what))
- return 0;
-
- if (path_equal(m->where, "/"))
- return 0;
-
- if (mount_is_auto(p) && UNIT(m)->manager->running_as == SYSTEMD_SYSTEM)
- device_wants_mount = true;
-
- r = unit_add_node_link(UNIT(m), p->what, device_wants_mount);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-static int mount_add_quota_links(Mount *m) {
- int r;
- MountParameters *p;
-
- assert(m);
-
- if (UNIT(m)->manager->running_as != SYSTEMD_SYSTEM)
- return 0;
-
- p = get_mount_parameters_fragment(m);
- if (!p)
- return 0;
-
- if (!needs_quota(p))
- return 0;
-
- r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true);
- if (r < 0)
- return r;
-
- r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-static bool should_umount(Mount *m) {
- MountParameters *p;
-
- if (path_equal(m->where, "/") ||
- path_equal(m->where, "/usr"))
- return false;
-
- p = get_mount_parameters(m);
- if (p && fstab_test_option(p->options, "x-initrd.mount\0") &&
- !in_initrd())
- return false;
-
- return true;
-}
-
-static int mount_add_default_dependencies(Mount *m) {
- const char *after, *after2, *online;
- MountParameters *p;
- int r;
-
- assert(m);
-
- if (UNIT(m)->manager->running_as != SYSTEMD_SYSTEM)
- return 0;
-
- /* We do not add any default dependencies to / and /usr, since
- * they are guaranteed to stay mounted the whole time, since
- * our system is on it. Also, don't bother with anything
- * mounted below virtual file systems, it's also going to be
- * virtual, and hence not worth the effort. */
- if (path_equal(m->where, "/") ||
- path_equal(m->where, "/usr") ||
- path_startswith(m->where, "/proc") ||
- path_startswith(m->where, "/sys") ||
- path_startswith(m->where, "/dev"))
- return 0;
-
- p = get_mount_parameters(m);
- if (!p)
- return 0;
-
- if (mount_is_network(p)) {
- after = SPECIAL_REMOTE_FS_PRE_TARGET;
- after2 = SPECIAL_NETWORK_TARGET;
- online = SPECIAL_NETWORK_ONLINE_TARGET;
- } else {
- after = SPECIAL_LOCAL_FS_PRE_TARGET;
- after2 = NULL;
- online = NULL;
- }
-
- r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true);
- if (r < 0)
- return r;
-
- if (after2) {
- r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after2, NULL, true);
- if (r < 0)
- return r;
- }
-
- if (online) {
- r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_WANTS, UNIT_AFTER, online, NULL, true);
- if (r < 0)
- return r;
- }
-
- if (should_umount(m)) {
- r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
- if (r < 0)
- return r;
- }
-
- return 0;
-}
-
-static int mount_verify(Mount *m) {
- _cleanup_free_ char *e = NULL;
- bool b;
-
- assert(m);
-
- if (UNIT(m)->load_state != UNIT_LOADED)
- return 0;
-
- if (!m->from_fragment && !m->from_proc_self_mountinfo)
- return -ENOENT;
-
- e = unit_name_from_path(m->where, ".mount");
- if (!e)
- return -ENOMEM;
-
- b = unit_has_name(UNIT(m), e);
- if (!b) {
- log_unit_error(UNIT(m)->id, "%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_unit_error(UNIT(m)->id, "Cannot create mount unit for API file system %s. Refusing.", m->where);
- return -EINVAL;
- }
-
- if (UNIT(m)->fragment_path && !m->parameters_fragment.what) {
- log_unit_error(UNIT(m)->id, "%s's What setting is missing. Refusing.", UNIT(m)->id);
- return -EBADMSG;
- }
-
- if (m->exec_context.pam_name && m->kill_context.kill_mode != KILL_CONTROL_GROUP) {
- log_unit_error(UNIT(m)->id, "%s has PAM enabled. Kill mode must be set to control-group'. Refusing.",UNIT(m)->id);
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int mount_add_extras(Mount *m) {
- Unit *u = UNIT(m);
- int r;
-
- assert(m);
-
- if (u->fragment_path)
- m->from_fragment = true;
-
- if (!m->where) {
- m->where = unit_name_to_path(u->id);
- if (!m->where)
- return -ENOMEM;
- }
-
- path_kill_slashes(m->where);
-
- if (!u->description) {
- r = unit_set_description(u, m->where);
- if (r < 0)
- return r;
- }
-
- r = mount_add_device_links(m);
- if (r < 0)
- return r;
-
- r = mount_add_mount_links(m);
- if (r < 0)
- return r;
-
- r = mount_add_quota_links(m);
- if (r < 0)
- return r;
-
- r = unit_patch_contexts(u);
- if (r < 0)
- return r;
-
- r = unit_add_exec_dependencies(u, &m->exec_context);
- if (r < 0)
- return r;
-
- r = unit_add_default_slice(u, &m->cgroup_context);
- if (r < 0)
- return r;
-
- if (u->default_dependencies) {
- r = mount_add_default_dependencies(m);
- if (r < 0)
- return r;
- }
-
- return 0;
-}
-
-static int mount_load(Unit *u) {
- Mount *m = MOUNT(u);
- int r;
-
- assert(u);
- assert(u->load_state == UNIT_STUB);
-
- if (m->from_proc_self_mountinfo)
- r = unit_load_fragment_and_dropin_optional(u);
- else
- r = unit_load_fragment_and_dropin(u);
-
- if (r < 0)
- return r;
-
- /* This is a new unit? Then let's add in some extras */
- if (u->load_state == UNIT_LOADED) {
- r = mount_add_extras(m);
- if (r < 0)
- return r;
- }
-
- 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) {
- m->timer_event_source = sd_event_source_unref(m->timer_event_source);
- 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) {
- if (state != old_state)
- mount_notify_automount(m, -ENODEV);
- }
-
- if (state != old_state)
- log_unit_debug(UNIT(m)->id,
- "%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, Hashmap *deferred_work) {
- 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)
- return 0;
-
- 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;
-
- r = unit_watch_pid(UNIT(m), m->control_pid);
- if (r < 0)
- return r;
-
- r = mount_arm_timer(m);
- if (r < 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 /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, p ? strna(p->what) : "n/a",
- prefix, p ? strna(p->fstype) : "n/a",
- prefix, p ? strna(p->options) : "n/a",
- 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: "PID_FMT"\n",
- prefix, m->control_pid);
-
- exec_context_dump(&m->exec_context, f, prefix);
- kill_context_dump(&m->kill_context, f, prefix);
-}
-
-static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
- pid_t pid;
- int r;
- ExecParameters exec_params = {
- .apply_permissions = true,
- .apply_chroot = true,
- .apply_tty_stdin = true,
- };
-
- assert(m);
- assert(c);
- assert(_pid);
-
- (void) unit_realize_cgroup(UNIT(m));
- if (m->reset_cpu_usage) {
- (void) unit_reset_cpu_usage(UNIT(m));
- m->reset_cpu_usage = false;
- }
-
- r = unit_setup_exec_runtime(UNIT(m));
- if (r < 0)
- goto fail;
-
- r = mount_arm_timer(m);
- if (r < 0)
- goto fail;
-
- exec_params.environment = UNIT(m)->manager->environment;
- exec_params.confirm_spawn = UNIT(m)->manager->confirm_spawn;
- exec_params.cgroup_supported = UNIT(m)->manager->cgroup_supported;
- exec_params.cgroup_path = UNIT(m)->cgroup_path;
- exec_params.cgroup_delegate = m->cgroup_context.delegate;
- exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(m)->manager);
- exec_params.unit_id = UNIT(m)->id;
-
- r = exec_spawn(c,
- &m->exec_context,
- &exec_params,
- m->exec_runtime,
- &pid);
- if (r < 0)
- goto fail;
-
- r = unit_watch_pid(UNIT(m), pid);
- if (r < 0)
- /* FIXME: we need to do something here */
- goto fail;
-
- *_pid = pid;
-
- return 0;
-
-fail:
- m->timer_event_source = sd_event_source_unref(m->timer_event_source);
-
- return r;
-}
-
-static void mount_enter_dead(Mount *m, MountResult f) {
- assert(m);
-
- if (f != MOUNT_SUCCESS)
- m->result = f;
-
- exec_runtime_destroy(m->exec_runtime);
- m->exec_runtime = exec_runtime_unref(m->exec_runtime);
-
- exec_context_destroy_runtime_directory(&m->exec_context, manager_get_runtime_prefix(UNIT(m)->manager));
-
- 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;
-
- assert(m);
-
- if (f != MOUNT_SUCCESS)
- m->result = f;
-
- r = unit_kill_context(
- UNIT(m),
- &m->kill_context,
- (state != MOUNT_MOUNTING_SIGTERM && state != MOUNT_UNMOUNTING_SIGTERM && state != MOUNT_REMOUNTING_SIGTERM) ?
- KILL_KILL : KILL_TERMINATE,
- -1,
- m->control_pid,
- false);
- if (r < 0)
- goto fail;
-
- if (r > 0) {
- r = mount_arm_timer(m);
- if (r < 0)
- goto fail;
-
- mount_set_state(m, state);
- } else if (state == MOUNT_REMOUNTING_SIGTERM)
- mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_SUCCESS);
- else if (state == MOUNT_REMOUNTING_SIGKILL)
- mount_enter_mounted(m, MOUNT_SUCCESS);
- else if (state == MOUNT_MOUNTING_SIGTERM)
- mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_SUCCESS);
- else if (state == MOUNT_UNMOUNTING_SIGTERM)
- mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_SUCCESS);
- else
- mount_enter_dead(m, MOUNT_SUCCESS);
-
- return;
-
-fail:
- log_unit_warning(UNIT(m)->id,
- "%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);
-}
-
-void warn_if_dir_nonempty(const char *unit, const char* where) {
- int r;
-
- assert(unit);
- assert(where);
-
- r = dir_is_empty(where);
- if (r > 0)
- return;
- else if (r == 0)
- log_unit_struct(unit,
- LOG_NOTICE,
- LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING),
- LOG_MESSAGE("%s: Directory %s to mount over is not empty, mounting anyway.",
- unit, where),
- "WHERE=%s", where,
- NULL);
- else
- log_unit_warning(unit,
- "MESSAGE=Failed to check directory %s: %s",
- where, strerror(-r));
-}
-
-static int fail_if_symlink(const char *unit, const char* where) {
- assert(where);
-
- if (is_symlink(where) > 0) {
- log_unit_struct(unit,
- LOG_ERR,
- LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING),
- LOG_MESSAGE("%s: Mount on symlink %s not allowed.",
- unit, where),
- "WHERE=%s", where,
- NULL);
-
- return -ELOOP;
- }
- return 0;
-}
-
-static void mount_enter_unmounting(Mount *m) {
- int r;
-
- assert(m);
-
- /* Start counting our attempts */
- if (!IN_SET(m->state,
- MOUNT_UNMOUNTING,
- MOUNT_UNMOUNTING_SIGTERM,
- MOUNT_UNMOUNTING_SIGKILL))
- m->n_retry_umount = 0;
-
- m->control_command_id = MOUNT_EXEC_UNMOUNT;
- m->control_command = m->exec_command + MOUNT_EXEC_UNMOUNT;
-
- r = exec_command_set(m->control_command, "/bin/umount", m->where, NULL);
- if (r >= 0 && UNIT(m)->manager->running_as == SYSTEMD_SYSTEM)
- r = exec_command_append(m->control_command, "-n", NULL);
- if (r < 0)
- goto fail;
-
- mount_unwatch_control_pid(m);
-
- r = mount_spawn(m, m->control_command, &m->control_pid);
- if (r < 0)
- goto fail;
-
- mount_set_state(m, MOUNT_UNMOUNTING);
-
- return;
-
-fail:
- log_unit_warning(UNIT(m)->id,
- "%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_label(m->where, m->directory_mode);
-
- warn_if_dir_nonempty(m->meta.id, m->where);
-
- /* Create the source directory for bind-mounts if needed */
- p = get_mount_parameters_fragment(m);
- if (p && mount_is_bind(p))
- mkdir_p_label(p->what, m->directory_mode);
-
- r = fail_if_symlink(m->meta.id, m->where);
- if (r < 0)
- goto fail;
-
- if (m->from_fragment) {
- _cleanup_free_ char *opts = NULL;
-
- r = fstab_filter_options(m->parameters_fragment.options,
- "nofail\0" "noauto\0" "auto\0", NULL, NULL, &opts);
- if (r < 0)
- goto fail;
-
- r = exec_command_set(m->control_command, "/bin/mount",
- m->parameters_fragment.what, m->where, NULL);
- if (r >= 0 && UNIT(m)->manager->running_as == SYSTEMD_SYSTEM)
- r = exec_command_append(m->control_command, "-n", NULL);
- if (r >= 0 && m->sloppy_options)
- r = exec_command_append(m->control_command, "-s", NULL);
- if (r >= 0 && m->parameters_fragment.fstype)
- r = exec_command_append(m->control_command, "-t", m->parameters_fragment.fstype, NULL);
- if (r >= 0 && !isempty(opts))
- r = exec_command_append(m->control_command, "-o", opts, NULL);
- } else
- r = -ENOENT;
-
- if (r < 0)
- goto fail;
-
- mount_unwatch_control_pid(m);
-
- r = mount_spawn(m, m->control_command, &m->control_pid);
- if (r < 0)
- goto fail;
-
- mount_set_state(m, MOUNT_MOUNTING);
-
- return;
-
-fail:
- log_unit_warning(UNIT(m)->id,
- "%s failed to run 'mount' task: %s",
- UNIT(m)->id, strerror(-r));
- mount_enter_dead(m, MOUNT_FAILURE_RESOURCES);
-}
-
-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) {
- const char *o;
-
- if (m->parameters_fragment.options)
- o = strjoina("remount,", m->parameters_fragment.options);
- else
- o = "remount";
-
- r = exec_command_set(m->control_command, "/bin/mount",
- m->parameters_fragment.what, m->where,
- "-o", o, NULL);
- if (r >= 0 && UNIT(m)->manager->running_as == SYSTEMD_SYSTEM)
- r = exec_command_append(m->control_command, "-n", NULL);
- if (r >= 0 && m->sloppy_options)
- r = exec_command_append(m->control_command, "-s", NULL);
- if (r >= 0 && m->parameters_fragment.fstype)
- r = exec_command_append(m->control_command, "-t", m->parameters_fragment.fstype, NULL);
- } else
- r = -ENOENT;
-
- if (r < 0)
- goto fail;
-
- mount_unwatch_control_pid(m);
-
- r = mount_spawn(m, m->control_command, &m->control_pid);
- if (r < 0)
- goto fail;
-
- mount_set_state(m, MOUNT_REMOUNTING);
-
- return;
-
-fail:
- log_unit_warning(UNIT(m)->id,
- "%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;
- m->reset_cpu_usage = true;
-
- mount_enter_mounting(m);
- return 1;
-}
-
-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 1;
-}
-
-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", PID_FMT, 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_unit_debug(u->id, "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_unit_debug(UNIT(m)->id,
- "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_unit_debug(UNIT(m)->id,
- "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_unit_debug(UNIT(m)->id,
- "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_unit_debug(UNIT(m)->id,
- "Failed to parse exec-command value %s", value);
- else {
- m->control_command_id = id;
- m->control_command = m->exec_command + id;
- }
- } else
- log_unit_debug(UNIT(m)->id,
- "Unknown serialization key '%s'", key);
-
- return 0;
-}
-
-_pure_ static UnitActiveState mount_active_state(Unit *u) {
- assert(u);
-
- return state_translation_table[MOUNT(u)->state];
-}
-
-_pure_ static const char *mount_sub_state_to_string(Unit *u) {
- assert(u);
-
- return mount_state_to_string(MOUNT(u)->state);
-}
-
-_pure_ static bool mount_check_gc(Unit *u) {
- Mount *m = MOUNT(u);
-
- assert(m);
-
- return 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, NULL))
- 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_unit_full(u->id,
- 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) {
-
- if (m->from_proc_self_mountinfo) {
-
- /* Still a mount point? If so, let's
- * try again. Most likely there were
- * multiple mount points stacked on
- * top of each other. Note that due to
- * the io event priority logic we can
- * be sure the new mountinfo is loaded
- * before we process the SIGCHLD for
- * the mount command. */
-
- if (m->n_retry_umount < RETRY_UMOUNT_MAX) {
- log_unit_debug(u->id, "%s: mount still present, trying again.", u->id);
- m->n_retry_umount++;
- mount_enter_unmounting(m);
- } else {
- log_unit_debug(u->id, "%s: mount still present after %u attempts to unmount, giving up.", u->id, m->n_retry_umount);
- mount_enter_mounted(m, f);
- }
- } else
- 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 int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
- Mount *m = MOUNT(userdata);
-
- assert(m);
- assert(m->timer_event_source == source);
-
- switch (m->state) {
-
- case MOUNT_MOUNTING:
- case MOUNT_MOUNTING_DONE:
- log_unit_warning(UNIT(m)->id,
- "%s mounting timed out. Stopping.", UNIT(m)->id);
- mount_enter_signal(m, MOUNT_MOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
- break;
-
- case MOUNT_REMOUNTING:
- log_unit_warning(UNIT(m)->id,
- "%s remounting timed out. Stopping.", UNIT(m)->id);
- m->reload_result = MOUNT_FAILURE_TIMEOUT;
- mount_enter_mounted(m, MOUNT_SUCCESS);
- break;
-
- case MOUNT_UNMOUNTING:
- log_unit_warning(UNIT(m)->id,
- "%s unmounting timed out. Stopping.", UNIT(m)->id);
- mount_enter_signal(m, MOUNT_UNMOUNTING_SIGTERM, MOUNT_FAILURE_TIMEOUT);
- break;
-
- case MOUNT_MOUNTING_SIGTERM:
- if (m->kill_context.send_sigkill) {
- log_unit_warning(UNIT(m)->id,
- "%s mounting timed out. Killing.", UNIT(m)->id);
- mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
- } else {
- log_unit_warning(UNIT(m)->id,
- "%s mounting timed out. Skipping SIGKILL. Ignoring.",
- UNIT(m)->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->kill_context.send_sigkill) {
- log_unit_warning(UNIT(m)->id,
- "%s remounting timed out. Killing.", UNIT(m)->id);
- mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
- } else {
- log_unit_warning(UNIT(m)->id,
- "%s remounting timed out. Skipping SIGKILL. Ignoring.",
- UNIT(m)->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->kill_context.send_sigkill) {
- log_unit_warning(UNIT(m)->id,
- "%s unmounting timed out. Killing.", UNIT(m)->id);
- mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT);
- } else {
- log_unit_warning(UNIT(m)->id,
- "%s unmounting timed out. Skipping SIGKILL. Ignoring.",
- UNIT(m)->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_unit_warning(UNIT(m)->id,
- "%s mount process still around after SIGKILL. Ignoring.",
- UNIT(m)->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.");
- }
-
- return 0;
-}
-
-static int mount_setup_unit(
- Manager *m,
- const char *what,
- const char *where,
- const char *options,
- const char *fstype,
- bool set_flags) {
-
- _cleanup_free_ char *e = NULL, *w = NULL, *o = NULL, *f = NULL;
- bool load_extras = false;
- MountParameters *p;
- bool delete, changed = false;
- Unit *u;
- int r;
-
- assert(m);
- assert(what);
- assert(where);
- assert(options);
- assert(fstype);
-
- /* 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)
- return log_oom();
-
- r = unit_add_name(u, e);
- if (r < 0)
- goto fail;
-
- MOUNT(u)->where = strdup(where);
- if (!MOUNT(u)->where) {
- r = -ENOMEM;
- goto fail;
- }
-
- u->source_path = strdup("/proc/self/mountinfo");
- if (!u->source_path) {
- r = -ENOMEM;
- goto fail;
- }
-
- if (m->running_as == SYSTEMD_SYSTEM) {
- const char* target;
-
- target = mount_needs_network(options, fstype) ? SPECIAL_REMOTE_FS_TARGET : SPECIAL_LOCAL_FS_TARGET;
- r = unit_add_dependency_by_name(u, UNIT_BEFORE, target, NULL, true);
- if (r < 0)
- goto fail;
-
- if (should_umount(MOUNT(u))) {
- r = unit_add_dependency_by_name(u, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true);
- if (r < 0)
- goto fail;
- }
- }
-
- unit_add_to_load_queue(u);
- changed = true;
- } else {
- delete = false;
-
- if (!MOUNT(u)->where) {
- MOUNT(u)->where = strdup(where);
- if (!MOUNT(u)->where) {
- r = -ENOMEM;
- goto fail;
- }
- }
-
- if (m->running_as == SYSTEMD_SYSTEM &&
- mount_needs_network(options, fstype)) {
- /* _netdev option may have shown up late, or on a
- * remount. Add remote-fs dependencies, even though
- * local-fs ones may already be there. */
- unit_add_dependency_by_name(u, UNIT_BEFORE, SPECIAL_REMOTE_FS_TARGET, NULL, true);
- load_extras = true;
- }
-
- if (u->load_state == UNIT_NOT_FOUND) {
- u->load_state = UNIT_LOADED;
- u->load_error = 0;
-
- /* Load in the extras later on, after we
- * finished initialization of the unit */
- load_extras = true;
- changed = true;
- }
- }
-
- w = strdup(what);
- o = strdup(options);
- f = strdup(fstype);
- if (!w || !o || !f) {
- r = -ENOMEM;
- goto fail;
- }
-
- p = &MOUNT(u)->parameters_proc_self_mountinfo;
-
- changed = changed ||
- !streq_ptr(p->options, options) ||
- !streq_ptr(p->what, what) ||
- !streq_ptr(p->fstype, fstype);
-
- if (set_flags) {
- MOUNT(u)->is_mounted = true;
- MOUNT(u)->just_mounted = !MOUNT(u)->from_proc_self_mountinfo;
- MOUNT(u)->just_changed = changed;
- }
-
- MOUNT(u)->from_proc_self_mountinfo = true;
-
- free(p->what);
- p->what = w;
- w = NULL;
-
- free(p->options);
- p->options = o;
- o = NULL;
-
- free(p->fstype);
- p->fstype = f;
- f = NULL;
-
- if (load_extras) {
- r = mount_add_extras(MOUNT(u));
- if (r < 0)
- goto fail;
- }
-
- if (changed)
- unit_add_to_dbus_queue(u);
-
- return 0;
-
-fail:
- log_warning_errno(r, "Failed to set up mount unit: %m");
-
- if (delete && u)
- unit_free(u);
-
- return r;
-}
-
-static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
- _cleanup_(mnt_free_tablep) struct libmnt_table *t = NULL;
- _cleanup_(mnt_free_iterp) struct libmnt_iter *i = NULL;
- int r = 0;
-
- assert(m);
-
- t = mnt_new_table();
- if (!t)
- return log_oom();
-
- i = mnt_new_iter(MNT_ITER_FORWARD);
- if (!i)
- return log_oom();
-
- r = mnt_table_parse_mtab(t, NULL);
- if (r < 0)
- return log_error_errno(r, "Failed to parse /proc/self/mountinfo: %m");
-
- r = 0;
- for (;;) {
- const char *device, *path, *options, *fstype;
- _cleanup_free_ const char *d = NULL, *p = NULL;
- struct libmnt_fs *fs;
- int k;
-
- k = mnt_table_next_fs(t, i, &fs);
- if (k == 1)
- break;
- if (k < 0)
- return log_error_errno(k, "Failed to get next entry from /proc/self/mountinfo: %m");
-
- device = mnt_fs_get_source(fs);
- path = mnt_fs_get_target(fs);
- options = mnt_fs_get_options(fs);
- fstype = mnt_fs_get_fstype(fs);
-
- d = cunescape(device);
- if (!d)
- return log_oom();
-
- p = cunescape(path);
- if (!p)
- return log_oom();
-
- (void) device_found_node(m, d, true, DEVICE_FOUND_MOUNT, set_flags);
-
- k = mount_setup_unit(m, d, p, options, fstype, set_flags);
- if (r == 0 && k < 0)
- r = k;
- }
-
- return r;
-}
-
-static void mount_shutdown(Manager *m) {
- assert(m);
-
- m->mount_event_source = sd_event_source_unref(m->mount_event_source);
- m->mount_utab_event_source = sd_event_source_unref(m->mount_utab_event_source);
-
- if (m->proc_self_mountinfo) {
- fclose(m->proc_self_mountinfo);
- m->proc_self_mountinfo = NULL;
- }
- m->utab_inotify_fd = safe_close(m->utab_inotify_fd);
-}
-
-static int mount_get_timeout(Unit *u, uint64_t *timeout) {
- Mount *m = MOUNT(u);
- int r;
-
- if (!m->timer_event_source)
- return 0;
-
- r = sd_event_source_get_time(m->timer_event_source, timeout);
- if (r < 0)
- return r;
-
- return 1;
-}
-
-static int mount_enumerate(Manager *m) {
- int r;
- assert(m);
-
- mnt_init_debug(0);
-
- if (!m->proc_self_mountinfo) {
- m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re");
- if (!m->proc_self_mountinfo)
- return -errno;
-
- r = sd_event_add_io(m->event, &m->mount_event_source, fileno(m->proc_self_mountinfo), EPOLLPRI, mount_dispatch_io, m);
- if (r < 0)
- goto fail;
-
- /* Dispatch this before we dispatch SIGCHLD, so that
- * we always get the events from /proc/self/mountinfo
- * before the SIGCHLD of /bin/mount. */
- r = sd_event_source_set_priority(m->mount_event_source, -10);
- if (r < 0)
- goto fail;
- }
-
- if (m->utab_inotify_fd < 0) {
- m->utab_inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
- if (m->utab_inotify_fd < 0) {
- r = -errno;
- goto fail;
- }
-
- (void) mkdir_p_label("/run/mount", 0755);
-
- r = inotify_add_watch(m->utab_inotify_fd, "/run/mount", IN_MOVED_TO);
- if (r < 0) {
- r = -errno;
- goto fail;
- }
-
- r = sd_event_add_io(m->event, &m->mount_utab_event_source, m->utab_inotify_fd, EPOLLIN, mount_dispatch_io, m);
- if (r < 0)
- goto fail;
-
- r = sd_event_source_set_priority(m->mount_utab_event_source, -10);
- if (r < 0)
- goto fail;
- }
-
- r = mount_load_proc_self_mountinfo(m, false);
- if (r < 0)
- goto fail;
-
- return 0;
-
-fail:
- mount_shutdown(m);
- return r;
-}
-
-static int mount_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
- Manager *m = userdata;
- Unit *u;
- int r;
-
- assert(m);
- assert(revents & (EPOLLPRI | EPOLLIN));
-
- /* The manager calls this for every fd event happening on the
- * /proc/self/mountinfo file, which informs us about mounting
- * table changes, and for /run/mount events which we watch
- * for mount options. */
-
- if (fd == m->utab_inotify_fd) {
- bool rescan = false;
-
- /* FIXME: We *really* need to replace this with
- * libmount's own API for this, we should not hardcode
- * internal behaviour of libmount here. */
-
- for (;;) {
- union inotify_event_buffer buffer;
- struct inotify_event *e;
- ssize_t l;
-
- l = read(fd, &buffer, sizeof(buffer));
- if (l < 0) {
- if (errno == EAGAIN || errno == EINTR)
- break;
-
- log_error_errno(errno, "Failed to read utab inotify: %m");
- break;
- }
-
- FOREACH_INOTIFY_EVENT(e, buffer, l) {
- /* Only care about changes to utab,
- * but we have to monitor the
- * directory to reliably get
- * notifications about when utab is
- * replaced using rename(2) */
- if ((e->mask & IN_Q_OVERFLOW) || streq(e->name, "utab"))
- rescan = true;
- }
- }
-
- if (!rescan)
- return 0;
- }
-
- r = mount_load_proc_self_mountinfo(m, true);
- if (r < 0) {
- /* 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 0;
- }
-
- 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) {
-
- mount->from_proc_self_mountinfo = false;
-
- switch (mount->state) {
-
- case MOUNT_MOUNTED:
- /* This has just been unmounted by
- * somebody else, follow the state
- * change. */
- mount_enter_dead(mount, MOUNT_SUCCESS);
- break;
-
- default:
- break;
- }
-
- if (mount->parameters_proc_self_mountinfo.what)
- (void) device_found_node(m, mount->parameters_proc_self_mountinfo.what, false, DEVICE_FOUND_MOUNT, true);
-
-
- } else if (mount->just_mounted || mount->just_changed) {
-
- /* New or changed mount entry */
-
- switch (mount->state) {
-
- case MOUNT_DEAD:
- case MOUNT_FAILED:
- /* This has just been mounted by
- * somebody else, follow the state
- * change. */
- mount_enter_mounted(mount, MOUNT_SUCCESS);
- break;
-
- case MOUNT_MOUNTING:
- mount_set_state(mount, MOUNT_MOUNTING_DONE);
- 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;
- }
-
- return 0;
-}
-
-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, int signo, sd_bus_error *error) {
- return unit_kill_common(u, who, signo, -1, MOUNT(u)->control_pid, error);
-}
-
-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 = {
- .object_size = sizeof(Mount),
- .exec_context_offset = offsetof(Mount, exec_context),
- .cgroup_context_offset = offsetof(Mount, cgroup_context),
- .kill_context_offset = offsetof(Mount, kill_context),
- .exec_runtime_offset = offsetof(Mount, exec_runtime),
-
- .sections =
- "Unit\0"
- "Mount\0"
- "Install\0",
- .private_section = "Mount",
-
- .no_alias = true,
- .no_instances = 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,
-
- .reset_failed = mount_reset_failed,
-
- .bus_interface = "org.freedesktop.systemd1.Mount",
- .bus_vtable = bus_mount_vtable,
- .bus_set_property = bus_mount_set_property,
- .bus_commit_properties = bus_mount_commit_properties,
-
- .get_timeout = mount_get_timeout,
-
- .can_transient = true,
-
- .enumerate = mount_enumerate,
- .shutdown = mount_shutdown,
-
- .status_message_formats = {
- .starting_stopping = {
- [0] = "Mounting %s...",
- [1] = "Unmounting %s...",
- },
- .finished_start_job = {
- [JOB_DONE] = "Mounted %s.",
- [JOB_FAILED] = "Failed to mount %s.",
- [JOB_DEPENDENCY] = "Dependency failed for %s.",
- [JOB_TIMEOUT] = "Timed out mounting %s.",
- },
- .finished_stop_job = {
- [JOB_DONE] = "Unmounted %s.",
- [JOB_FAILED] = "Failed unmounting %s.",
- [JOB_TIMEOUT] = "Timed out unmounting %s.",
- },
- },
-};
~ianmdlvl / elogind.git / blobdiff