| /*-*- 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 <mntent.h> |
| #include <sys/epoll.h> |
| #include <signal.h> |
| |
| #include "manager.h" |
| #include "unit.h" |
| #include "mount.h" |
| #include "load-fragment.h" |
| #include "load-dropin.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 "bus-errors.h" |
| #include "exit-status.h" |
| #include "def.h" |
| |
| static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = { |
| [MOUNT_DEAD] = UNIT_INACTIVE, |
| [MOUNT_MOUNTING] = UNIT_ACTIVATING, |
| [MOUNT_MOUNTING_DONE] = UNIT_ACTIVE, |
| [MOUNT_MOUNTED] = UNIT_ACTIVE, |
| [MOUNT_REMOUNTING] = UNIT_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 char* mount_test_option(const char *haystack, const char *needle) { |
| struct mntent me = { .mnt_opts = (char*) haystack }; |
| |
| assert(needle); |
| |
| /* Like glibc's hasmntopt(), but works on a string, not a |
| * struct mntent */ |
| |
| if (!haystack) |
| return NULL; |
| |
| return hasmntopt(&me, needle); |
| } |
| |
| static bool mount_is_network(MountParameters *p) { |
| assert(p); |
| |
| if (mount_test_option(p->options, "_netdev")) |
| return true; |
| |
| if (p->fstype && fstype_is_network(p->fstype)) |
| return true; |
| |
| return false; |
| } |
| |
| static bool mount_is_bind(MountParameters *p) { |
| assert(p); |
| |
| if (mount_test_option(p->options, "bind")) |
| return true; |
| |
| if (p->fstype && streq(p->fstype, "bind")) |
| return true; |
| |
| if (mount_test_option(p->options, "rbind")) |
| return true; |
| |
| if (p->fstype && streq(p->fstype, "rbind")) |
| return true; |
| |
| return false; |
| } |
| |
| static bool mount_is_auto(MountParameters *p) { |
| assert(p); |
| |
| return !mount_test_option(p->options, "noauto"); |
| } |
| |
| static bool needs_quota(MountParameters *p) { |
| assert(p); |
| |
| if (mount_is_network(p)) |
| return false; |
| |
| if (mount_is_bind(p)) |
| return false; |
| |
| return mount_test_option(p->options, "usrquota") || |
| mount_test_option(p->options, "grpquota") || |
| mount_test_option(p->options, "quota") || |
| mount_test_option(p->options, "usrjquota") || |
| mount_test_option(p->options, "grpjquota"); |
| } |
| |
| 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; |
| |
| exec_context_init(&m->exec_context); |
| kill_context_init(&m->kill_context); |
| cgroup_context_init(&m->cgroup_context); |
| |
| 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_monotonic(UNIT(m)->manager->event, &m->timer_event_source, 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); |
| |
| cgroup_context_done(&m->cgroup_context); |
| exec_context_done(&m->exec_context); |
| 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_fragment(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 && mount_test_option(p->options, "x-initrd.mount") && |
| !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; |
| |
| p = get_mount_parameters(m); |
| |
| if (!p) |
| return 0; |
| |
| if (path_equal(m->where, "/")) |
| 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_fix_timeouts(Mount *m) { |
| MountParameters *p; |
| const char *timeout = NULL; |
| Unit *other; |
| Iterator i; |
| usec_t u; |
| char *t; |
| int r; |
| |
| assert(m); |
| |
| p = get_mount_parameters_fragment(m); |
| if (!p) |
| return 0; |
| |
| /* Allow configuration how long we wait for a device that |
| * backs a mount point to show up. This is useful to support |
| * endless device timeouts for devices that show up only after |
| * user input, like crypto devices. */ |
| |
| if ((timeout = mount_test_option(p->options, "comment=systemd.device-timeout"))) |
| timeout += 31; |
| else if ((timeout = mount_test_option(p->options, "x-systemd.device-timeout"))) |
| timeout += 25; |
| else |
| return 0; |
| |
| t = strndup(timeout, strcspn(timeout, ",;" WHITESPACE)); |
| if (!t) |
| return -ENOMEM; |
| |
| r = parse_sec(t, &u); |
| free(t); |
| |
| if (r < 0) { |
| log_warning_unit(UNIT(m)->id, |
| "Failed to parse timeout for %s, ignoring: %s", |
| m->where, timeout); |
| return r; |
| } |
| |
| 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) { |
| _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_error_unit(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_error_unit(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_error_unit(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_error_unit(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); |
| |
| r = unit_add_exec_dependencies(u, &m->exec_context); |
| if (r < 0) |
| return r; |
| |
| 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; |
| |
| if (u->default_dependencies) { |
| r = mount_add_default_dependencies(m); |
| if (r < 0) |
| return r; |
| } |
| |
| r = unit_add_default_slice(u); |
| if (r < 0) |
| return r; |
| |
| r = mount_fix_timeouts(m); |
| if (r < 0) |
| return r; |
| |
| r = unit_exec_context_defaults(u, &m->exec_context); |
| 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_debug_unit(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) { |
| 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; |
| |
| assert(m); |
| assert(c); |
| assert(_pid); |
| |
| unit_realize_cgroup(UNIT(m)); |
| |
| r = unit_setup_exec_runtime(UNIT(m)); |
| if (r < 0) |
| goto fail; |
| |
| r = mount_arm_timer(m); |
| if (r < 0) |
| goto fail; |
| |
| r = exec_spawn(c, |
| NULL, |
| &m->exec_context, |
| NULL, 0, |
| UNIT(m)->manager->environment, |
| true, |
| true, |
| true, |
| UNIT(m)->manager->confirm_spawn, |
| UNIT(m)->manager->cgroup_supported, |
| UNIT(m)->cgroup_path, |
| UNIT(m)->id, |
| 0, |
| NULL, |
| 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); |
| |
| 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, |
| -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_warning_unit(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) { |
| assert(unit); |
| assert(where); |
| |
| if (dir_is_empty(where) > 0) |
| return; |
| |
| log_struct_unit(LOG_NOTICE, |
| unit, |
| "MESSAGE=%s: Directory %s to mount over is not empty, mounting anyway.", |
| unit, where, |
| "WHERE=%s", where, |
| MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), |
| NULL); |
| } |
| |
| 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_unit(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); |
| |
| 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 |
| 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_warning_unit(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 = strappenda("remount,", m->parameters_fragment.options); |
| 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); |
| } 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_warning_unit(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; |
| |
| 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", 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_debug_unit(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_debug_unit(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_debug_unit(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_debug_unit(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_debug_unit(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_debug_unit(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_full_unit(f == MOUNT_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id, |
| "%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 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_warning_unit(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_warning_unit(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_warning_unit(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_warning_unit(UNIT(m)->id, |
| "%s mounting timed out. Killing.", UNIT(m)->id); |
| mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT); |
| } else { |
| log_warning_unit(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_warning_unit(UNIT(m)->id, |
| "%s remounting timed out. Killing.", UNIT(m)->id); |
| mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT); |
| } else { |
| log_warning_unit(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_warning_unit(UNIT(m)->id, |
| "%s unmounting timed out. Killing.", UNIT(m)->id); |
| mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, MOUNT_FAILURE_TIMEOUT); |
| } else { |
| log_warning_unit(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_warning_unit(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_add_one( |
| 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; |
| 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 -ENOMEM; |
| |
| 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 = fstype_is_network(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); |
| } else { |
| delete = false; |
| |
| if (!MOUNT(u)->where) { |
| MOUNT(u)->where = strdup(where); |
| if (!MOUNT(u)->where) { |
| r = -ENOMEM; |
| goto fail; |
| } |
| } |
| |
| 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; |
| } |
| } |
| |
| if (!(w = strdup(what)) || |
| !(o = strdup(options)) || |
| !(f = strdup(fstype))) { |
| r = -ENOMEM; |
| goto fail; |
| } |
| |
| 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; |
| |
| 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; |
| } |
| |
| unit_add_to_dbus_queue(u); |
| |
| return 0; |
| |
| fail: |
| if (delete && u) |
| unit_free(u); |
| |
| return r; |
| } |
| |
| static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { |
| int r = 0; |
| unsigned i; |
| |
| assert(m); |
| |
| rewind(m->proc_self_mountinfo); |
| |
| for (i = 1;; i++) { |
| _cleanup_free_ char *device = NULL, *path = NULL, *options = NULL, *options2 = NULL, *fstype = NULL, *d = NULL, *p = NULL, *o = NULL; |
| int k; |
| |
| 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); |
| |
| if (k == EOF) |
| break; |
| |
| if (k != 5) { |
| log_warning("Failed to parse /proc/self/mountinfo:%u.", i); |
| continue; |
| } |
| |
| o = strjoin(options, ",", options2, NULL); |
| if (!o) |
| return log_oom(); |
| |
| d = cunescape(device); |
| p = cunescape(path); |
| if (!d || !p) |
| return log_oom(); |
| |
| k = mount_add_one(m, d, p, o, fstype, set_flags); |
| if (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); |
| |
| if (m->proc_self_mountinfo) { |
| fclose(m->proc_self_mountinfo); |
| m->proc_self_mountinfo = NULL; |
| } |
| } |
| |
| 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); |
| |
| 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; |
| } |
| |
| 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); |
| |
| /* The manager calls this for every fd event happening on the |
| * /proc/self/mountinfo file, which informs us about mounting |
| * table changes */ |
| |
| r = mount_load_proc_self_mountinfo(m, true); |
| if (r < 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 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) { |
| /* 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_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, |
| |
| .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.", |
| }, |
| }, |
| }; |