#include <stdio.h>
#include <mntent.h>
#include <sys/epoll.h>
-#include <sys/poll.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 const char* const state_string_table[_MOUNT_STATE_MAX] = {
- [MOUNT_DEAD] = "dead",
- [MOUNT_MOUNTING] = "mounting",
- [MOUNT_MOUNTED] = "mounted",
- [MOUNT_UNMOUNTING] = "unmounting",
- [MOUNT_MAINTAINANCE] = "maintainance"
-};
+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->what);
+
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);
- if (state == m->state)
- return;
-
old_state = m->state;
m->state = state;
- log_debug("%s changed %s → %s", unit_id(UNIT(m)), state_string_table[old_state], state_string_table[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->from_proc_self_mountinfo)
- mount_set_state(m, MOUNT_MOUNTED);
+ 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 *s = MOUNT(u);
+ Mount *m = MOUNT(u);
+ MountParameters *p;
+
+ assert(m);
+ assert(f);
- assert(s);
+ 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",
- prefix, state_string_table[s->state],
- prefix, s->where,
- prefix, s->what,
- prefix, yes_no(s->from_etc_fstab),
- prefix, yes_no(s->from_proc_self_mountinfo));
+ "%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 UnitActiveState mount_active_state(Unit *u) {
- assert(u);
+static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) {
+ pid_t pid;
+ int r;
- return state_translation_table[MOUNT(u)->state];
+ 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_shutdown(Manager *m) {
+static void mount_enter_dead(Mount *m, bool success) {
assert(m);
- if (m->proc_self_mountinfo)
- fclose(m->proc_self_mountinfo);
+ if (!success)
+ m->failure = true;
+
+ mount_set_state(m, m->failure ? MOUNT_MAINTAINANCE : MOUNT_DEAD);
}
-static int mount_add_node_links(Mount *m) {
- Unit *device;
- char *e;
+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);
- /* Adds in links to the device that this node is based on */
+ if (!success)
+ m->failure = true;
- if (!path_startswith(m->what, "/dev/"))
- return 0;
+ if (m->kill_mode != KILL_NONE) {
+ int sig = (state == MOUNT_MOUNTING_SIGTERM ||
+ state == MOUNT_UNMOUNTING_SIGTERM ||
+ state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL;
- if (!(e = unit_name_escape_path(m->what+1, ".device")))
- return -ENOMEM;
+ if (m->kill_mode == KILL_CONTROL_GROUP) {
- r = manager_load_unit(UNIT(m)->meta.manager, e, &device);
- free(e);
+ 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)
- return r;
+ goto fail;
- if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, device)) < 0)
- return r;
+ mount_unwatch_control_pid(m);
- if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, device)) < 0)
- return r;
+ if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
+ goto fail;
- if ((r = unit_add_dependency(device, UNIT_WANTS, UNIT(m))) < 0)
- return r;
+ mount_set_state(m, MOUNT_MOUNTING);
- return 0;
+ return;
+
+fail:
+ log_warning("%s failed to run mount exectuable: %s", UNIT(m)->meta.id, strerror(-r));
+ mount_enter_dead(m, false);
}
-static int mount_add_path_links(Mount *m) {
- Meta *other;
+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;
- /* Adds in link to other mount points, that might lie below or
- * above us in the hierarchy */
+ assert(m);
- LIST_FOREACH(units_per_type, other, UNIT(m)->meta.manager->units_per_type[UNIT_MOUNT]) {
- Mount *n;
+ 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;
- n = (Mount*) other;
+ if (r < 0) {
+ r = -ENOMEM;
+ goto fail;
+ }
- if (n == m)
- return 0;
+ mount_unwatch_control_pid(m);
- if (path_startswith(m->where, n->where)) {
+ if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0)
+ goto fail;
- if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, (Unit*) other)) < 0)
- return r;
+ mount_set_state(m, MOUNT_REMOUNTING);
- if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, (Unit*) other)) < 0)
- return r;
+ return;
- } else if (startswith(n->where, m->where)) {
+fail:
+ mount_enter_mounted(m, false);
+}
- if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, (Unit*) other)) < 0)
- return r;
+static int mount_start(Unit *u) {
+ Mount *m = MOUNT(u);
- if ((r = unit_add_dependency((Unit*) other, UNIT_REQUIRES, UNIT(m))) < 0)
- return r;
+ 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 int mount_add_one(Manager *m, const char *what, const char *where, bool live, bool set_flags) {
- char *e;
+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);
- /* probably some kind of swap, which we don't cover for now */
- if (where[0] != '/')
+ 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(where, "/"))
- e = strdup("-.mount");
- else
- e = unit_name_escape_path(where+1, ".mount");
+ if (streq(fstype, "autofs"))
+ return 0;
- if (!e)
+ /* 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))) {
if (r < 0)
goto fail;
- if (!(MOUNT(u)->what = strdup(what)) ||
- !(MOUNT(u)->where = strdup(where))) {
- r = -ENOMEM;
- goto fail;
- }
-
- if ((r = unit_set_description(u, where)) < 0)
+ if (!(MOUNT(u)->where = strdup(where))) {
+ r = -ENOMEM;
goto fail;
+ }
unit_add_to_load_queue(u);
} else {
free(e);
}
- if (set_flags)
- MOUNT(u)->still_exists = true;
+ 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);
+ }
- if (live) {
- if (set_flags)
- MOUNT(u)->just_created = !MOUNT(u)->from_proc_self_mountinfo;
MOUNT(u)->from_proc_self_mountinfo = true;
} else {
- if (set_flags)
- MOUNT(u)->just_created = !MOUNT(u)->from_etc_fstab;
+ p = &MOUNT(u)->parameters_etc_fstab;
MOUNT(u)->from_etc_fstab = true;
}
- if ((r = mount_add_node_links(MOUNT(u))) < 0)
- goto fail;
+ free(p->what);
+ p->what = w;
- if ((r = mount_add_path_links(MOUNT(u))) < 0)
- goto fail;
+ 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 0;
+ return r;
}
static char *fstab_node_to_udev_node(char *p) {
return strdup(p);
}
-static int mount_load_etc_fstab(Manager *m, bool set_flags) {
+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;
if (where[0] == '/')
path_kill_slashes(where);
- r = mount_add_one(m, what, where, false, set_flags);
+ 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);
static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) {
int r;
+ char *device, *path, *options, *fstype, *d, *p;
assert(m);
for (;;) {
int k;
- char *device, *path, *d, *p;
+
+ device = path = options = fstype = d = p = NULL;
if ((k = fscanf(m->proc_self_mountinfo,
"%*s " /* (1) mount id */
"%*s " /* (3) major:minor */
"%*s " /* (4) root */
"%ms " /* (5) mount point */
- "%*s" /* (6) mount options */
+ "%ms" /* (6) mount options */
"%*[^-]" /* (7) optional fields */
"- " /* (8) seperator */
- "%*s " /* (9) file system type */
+ "%ms " /* (9) file system type */
"%ms" /* (10) mount source */
"%*[^\n]", /* some rubbish at the end */
&path,
- &device)) != 2) {
+ &options,
+ &fstype,
+ &device)) != 4) {
if (k == EOF)
break;
- return -EBADMSG;
+ r = -EBADMSG;
+ goto finish;
}
- if (!(d = cunescape(device))) {
- free(device);
- free(path);
- return -ENOMEM;
+ if (!(d = cunescape(device)) ||
+ !(p = cunescape(path))) {
+ r = -ENOMEM;
+ goto finish;
}
- free(device);
- if (!(p = cunescape(path))) {
- free(d);
- free(path);
- return -ENOMEM;
- }
- free(path);
+ if ((r = mount_add_one(m, d, p, options, fstype, true, set_flags)) < 0)
+ goto finish;
- r = mount_add_one(m, d, p, true, set_flags);
+ free(device);
+ free(path);
+ free(options);
+ free(fstype);
free(d);
free(p);
-
- if (r < 0)
- return r;
}
- return 0;
+ 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) {
struct epoll_event ev;
assert(m);
- if (!(m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "r")))
- return -errno;
+ 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);
+ 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;
+ 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 (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0)
+ return -errno;
+ }
- if ((r = mount_load_etc_fstab(m, false)) < 0)
+ if ((r = mount_load_etc_fstab(m)) < 0)
goto fail;
if ((r = mount_load_proc_self_mountinfo(m, false)) < 0)
* table changes */
if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) {
- log_error("Failed to reread /proc/self/mountinfo: %s", strerror(-errno));
+ 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;
}
LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) {
Mount *mount = (Mount*) meta;
- if (mount->just_created && mount->state == MOUNT_DEAD)
- mount_set_state(mount, MOUNT_MOUNTED);
- else if (!mount->still_exists && mount->state == MOUNT_MOUNTED) {
- mount_set_state(mount, MOUNT_DEAD);
+ 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;
+ }
}
- /* Clear the flags for later calls */
- mount->just_created = false;
- mount->still_exists = false;
+ /* 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",
- .init = unit_load_fragment_and_dropin,
+ .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