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