X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fmount.c;h=38547f7294df3a23e9b23fa2253b925deb2415de;hp=921984c1c116a6446ed4bb6facad915b5ac4a87b;hb=1e59887dc92e163163051e627817e1675374cd22;hpb=307e85efbb781ac609b6b3f905ff76b886ddd01e diff --git a/src/mount.c b/src/mount.c index 921984c1c..38547f729 100644 --- a/src/mount.c +++ b/src/mount.c @@ -35,21 +35,22 @@ #include "unit-name.h" #include "mount.h" #include "dbus-mount.h" +#include "special.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_REMOUNTING] = UNIT_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_REMOUNTING_SIGTERM] = UNIT_RELOADING, + [MOUNT_REMOUNTING_SIGKILL] = UNIT_RELOADING, [MOUNT_UNMOUNTING_SIGTERM] = UNIT_DEACTIVATING, [MOUNT_UNMOUNTING_SIGKILL] = UNIT_DEACTIVATING, - [MOUNT_MAINTAINANCE] = UNIT_INACTIVE, + [MOUNT_MAINTENANCE] = UNIT_MAINTENANCE }; static void mount_init(Unit *u) { @@ -59,13 +60,15 @@ static void mount_init(Unit *u) { assert(u->meta.load_state == UNIT_STUB); m->timeout_usec = DEFAULT_TIMEOUT_USEC; + m->directory_mode = 0755; + 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->exec_context.same_pgrp = true; m->timer_watch.type = WATCH_INVALID; @@ -167,6 +170,19 @@ static int mount_add_swap_links(Mount *m) { return 0; } +static int mount_add_path_links(Mount *m) { + Meta *other; + int r; + + assert(m); + + LIST_FOREACH(units_per_type, other, m->meta.manager->units_per_type[UNIT_PATH]) + if ((r = path_add_one_mount_link((Path*) other, m)) < 0) + return r; + + return 0; +} + static int mount_add_automount_links(Mount *m) { Meta *other; int r; @@ -237,24 +253,20 @@ static int mount_add_target_links(Mount *m) { else target = SPECIAL_LOCAL_FS_TARGET; - if ((r = manager_load_unit(UNIT(m)->meta.manager, target, NULL, &tu)) < 0) + if ((r = manager_load_unit(m->meta.manager, target, NULL, NULL, &tu)) < 0) return r; - if (automount && m->meta.manager->running_as != MANAGER_SESSION) { + if (automount && m->meta.manager->running_as == MANAGER_SYSTEM) { 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); - + return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, UNIT(am), true); } else { if (!noauto && handle) - if (user || m->meta.manager->running_as != MANAGER_SESSION) + if (user || m->meta.manager->running_as == MANAGER_SYSTEM) if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0) return r; @@ -262,14 +274,35 @@ static int mount_add_target_links(Mount *m) { } } +static int mount_add_default_dependencies(Mount *m) { + int r; + + assert(m); + + if (m->meta.manager->running_as == MANAGER_SYSTEM && + !path_equal(m->where, "/")) { + + if ((r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_FSCK_TARGET, NULL, true)) < 0) + return r; + + if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0) + return r; + } + + return 0; +} + static int mount_verify(Mount *m) { bool b; char *e; assert(m); - if (UNIT(m)->meta.load_state != UNIT_LOADED) + if (m->meta.load_state != UNIT_LOADED) return 0; + if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo) + return -ENOENT; + if (!(e = unit_name_from_path(m->where, ".mount"))) return -ENOMEM; @@ -277,15 +310,20 @@ static int mount_verify(Mount *m) { free(e); if (!b) { - log_error("%s's Where setting doesn't match unit name. Refusing.", UNIT(m)->meta.id); + log_error("%s's Where setting doesn't match unit name. Refusing.", 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); + log_error("%s's What setting is missing. Refusing.", m->meta.id); return -EBADMSG; } + if (m->exec_context.pam_name && m->exec_context.kill_mode != KILL_CONTROL_GROUP) { + log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", m->meta.id); + return -EINVAL; + } + return 0; } @@ -324,9 +362,7 @@ static int mount_load(Unit *u) { 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) + if ((r = unit_add_node_link(u, what, u->meta.manager->running_as == MANAGER_SYSTEM)) < 0) return r; if ((r = mount_add_mount_links(m)) < 0) @@ -338,6 +374,9 @@ static int mount_load(Unit *u) { if ((r = mount_add_swap_links(m)) < 0) return r; + if ((r = mount_add_path_links(m)) < 0) + return r; + if ((r = mount_add_automount_links(m)) < 0) return r; @@ -346,6 +385,10 @@ static int mount_load(Unit *u) { if ((r = unit_add_default_cgroup(u)) < 0) return r; + + if (m->meta.default_dependencies) + if ((r = mount_add_default_dependencies(m)) < 0) + return r; } return mount_verify(m); @@ -397,12 +440,12 @@ static void mount_set_state(Mount *m, MountState state) { state == MOUNT_REMOUNTING_SIGKILL || state == MOUNT_UNMOUNTING_SIGTERM || state == MOUNT_UNMOUNTING_SIGKILL || - state == MOUNT_MAINTAINANCE) + state == MOUNT_MAINTENANCE) mount_notify_automount(m, -ENODEV); if (state != old_state) log_debug("%s changed %s -> %s", - UNIT(m)->meta.id, + m->meta.id, mount_state_to_string(old_state), mount_state_to_string(state)); @@ -474,7 +517,7 @@ static void mount_dump(Unit *u, FILE *f, const char *prefix) { "%sFrom /etc/fstab: %s\n" "%sFrom /proc/self/mountinfo: %s\n" "%sFrom fragment: %s\n" - "%sKillMode: %s\n", + "%sDirectoryMode: %04o\n", prefix, mount_state_to_string(m->state), prefix, m->where, prefix, strna(p->what), @@ -483,12 +526,12 @@ static void mount_dump(Unit *u, FILE *f, const char *prefix) { 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)); + prefix, m->directory_mode); if (m->control_pid > 0) fprintf(f, - "%sControl PID: %llu\n", - prefix, (unsigned long long) m->control_pid); + "%sControl PID: %lu\n", + prefix, (unsigned long) m->control_pid); exec_context_dump(&m->exec_context, f, prefix); } @@ -511,8 +554,9 @@ static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) { m->meta.manager->environment, true, true, - UNIT(m)->meta.manager->confirm_spawn, - UNIT(m)->meta.cgroup_bondings, + true, + m->meta.manager->confirm_spawn, + m->meta.cgroup_bondings, &pid)) < 0) goto fail; @@ -536,7 +580,7 @@ static void mount_enter_dead(Mount *m, bool success) { if (!success) m->failure = true; - mount_set_state(m, m->failure ? MOUNT_MAINTAINANCE : MOUNT_DEAD); + mount_set_state(m, m->failure ? MOUNT_MAINTENANCE : MOUNT_DEAD); } static void mount_enter_mounted(Mount *m, bool success) { @@ -557,14 +601,14 @@ static void mount_enter_signal(Mount *m, MountState state, bool success) { if (!success) m->failure = true; - if (m->kill_mode != KILL_NONE) { + if (m->exec_context.kill_mode != KILL_NONE) { int sig = (state == MOUNT_MOUNTING_SIGTERM || state == MOUNT_UNMOUNTING_SIGTERM || - state == MOUNT_REMOUNTING_SIGTERM) ? SIGTERM : SIGKILL; + state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL; - if (m->kill_mode == KILL_CONTROL_GROUP) { + if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) { - if ((r = cgroup_bonding_kill_list(UNIT(m)->meta.cgroup_bondings, sig)) < 0) { + if ((r = cgroup_bonding_kill_list(m->meta.cgroup_bondings, sig)) < 0) { if (r != -EAGAIN && r != -ESRCH) goto fail; } else @@ -572,7 +616,10 @@ static void mount_enter_signal(Mount *m, MountState state, bool success) { } if (!sent && m->control_pid > 0) - if (kill(m->kill_mode == KILL_PROCESS ? m->control_pid : -m->control_pid, sig) < 0 && errno != ESRCH) { + if (kill(m->exec_context.kill_mode == KILL_PROCESS ? + m->control_pid : + -m->control_pid, sig) < 0 && errno != ESRCH) { + r = -errno; goto fail; } @@ -591,7 +638,7 @@ static void mount_enter_signal(Mount *m, MountState state, bool success) { return; fail: - log_warning("%s failed to kill processes: %s", UNIT(m)->meta.id, strerror(-r)); + log_warning("%s failed to kill processes: %s", m->meta.id, strerror(-r)); if (state == MOUNT_REMOUNTING_SIGTERM || state == MOUNT_REMOUNTING_SIGKILL) mount_enter_mounted(m, false); @@ -627,7 +674,7 @@ static void mount_enter_unmounting(Mount *m, bool success) { return; fail: - log_warning("%s failed to run umount exectuable: %s", UNIT(m)->meta.id, strerror(-r)); + log_warning("%s failed to run 'umount' task: %s", m->meta.id, strerror(-r)); mount_enter_mounted(m, false); } @@ -639,6 +686,8 @@ static void mount_enter_mounting(Mount *m) { m->control_command_id = MOUNT_EXEC_MOUNT; m->control_command = m->exec_command + MOUNT_EXEC_MOUNT; + mkdir_p(m->where, m->directory_mode); + if (m->from_fragment) r = exec_command_set( m->control_command, @@ -670,7 +719,7 @@ static void mount_enter_mounting(Mount *m) { return; fail: - log_warning("%s failed to run mount exectuable: %s", UNIT(m)->meta.id, strerror(-r)); + log_warning("%s failed to run 'mount' task: %s", m->meta.id, strerror(-r)); mount_enter_dead(m, false); } @@ -740,6 +789,7 @@ static void mount_enter_remounting(Mount *m, bool success) { return; fail: + log_warning("%s failed to run 'remount' task: %s", m->meta.id, strerror(-r)); mount_enter_mounted(m, false); } @@ -761,7 +811,7 @@ static int mount_start(Unit *u) { m->state == MOUNT_MOUNTING_SIGKILL) return 0; - assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTAINANCE); + assert(m->state == MOUNT_DEAD || m->state == MOUNT_MAINTENANCE); m->failure = false; mount_enter_mounting(m); @@ -773,23 +823,20 @@ static int mount_stop(Unit *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); + assert(m->state == MOUNT_MOUNTING || + m->state == MOUNT_MOUNTING_DONE || + m->state == MOUNT_MOUNTED || + m->state == MOUNT_MOUNTING_SIGTERM || + m->state == MOUNT_MOUNTING_SIGKILL || + m->state == MOUNT_REMOUNTING || + m->state == MOUNT_REMOUNTING_SIGTERM || + m->state == MOUNT_REMOUNTING_SIGKILL); mount_enter_unmounting(m, true); return 0; @@ -820,7 +867,7 @@ static int mount_serialize(Unit *u, FILE *f, FDSet *fds) { 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); + unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) m->control_pid); if (m->control_command_id >= 0) unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id)); @@ -830,7 +877,6 @@ static int mount_serialize(Unit *u, FILE *f, FDSet *fds) { 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); @@ -853,12 +899,12 @@ static int mount_deserialize_item(Unit *u, const char *key, const char *value, F m->failure = b || m->failure; } else if (streq(key, "control-pid")) { - unsigned pid; + pid_t pid; - if ((r = safe_atou(value, &pid)) < 0 || pid <= 0) + if (parse_pid(value, &pid) < 0) log_debug("Failed to parse control-pid value %s", value); else - m->control_pid = (pid_t) pid; + m->control_pid = pid; } else if (streq(key, "control-command")) { MountExecCommand id; @@ -902,19 +948,22 @@ static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) { assert(m); assert(pid >= 0); - success = is_clean_exit(code, status); - m->failure = m->failure || !success; + if (pid != m->control_pid) + return; - assert(m->control_pid == pid); m->control_pid = 0; + success = is_clean_exit(code, status); + m->failure = m->failure || !success; + if (m->control_command) { - exec_status_fill(&m->control_command->exec_status, pid, code, status); + exec_status_exit(&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); + log_full(success ? LOG_DEBUG : LOG_NOTICE, + "%s mount 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 @@ -933,7 +982,7 @@ static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) { case MOUNT_REMOUNTING_SIGKILL: case MOUNT_REMOUNTING_SIGTERM: - if (success && m->from_proc_self_mountinfo) + if (success) mount_enter_mounted(m, true); else if (m->from_proc_self_mountinfo) mount_enter_mounted(m, false); @@ -1243,7 +1292,7 @@ finish: static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { int r; - char *device, *path, *options, *fstype, *d, *p; + char *device, *path, *options, *options2, *fstype, *d, *p, *o; assert(m); @@ -1252,7 +1301,7 @@ static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { for (;;) { int k; - device = path = options = fstype = d = p = NULL; + device = path = options = options2 = fstype = d = p = o = NULL; if ((k = fscanf(m->proc_self_mountinfo, "%*s " /* (1) mount id */ @@ -1265,11 +1314,13 @@ static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { "- " /* (8) seperator */ "%ms " /* (9) file system type */ "%ms" /* (10) mount source */ + "%ms" /* (11) mount options 2 */ "%*[^\n]", /* some rubbish at the end */ &path, &options, &fstype, - &device)) != 4) { + &device, + &options2)) != 5) { if (k == EOF) break; @@ -1278,21 +1329,28 @@ static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { goto finish; } + if (asprintf(&o, "%s,%s", options, options2) < 0) { + r = -ENOMEM; + 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) + if ((r = mount_add_one(m, d, p, o, fstype, true, set_flags)) < 0) goto finish; free(device); free(path); free(options); + free(options2); free(fstype); free(d); free(p); + free(o); } r = 0; @@ -1301,9 +1359,11 @@ finish: free(device); free(path); free(options); + free(options2); free(fstype); free(d); free(p); + free(o); return r; } @@ -1362,7 +1422,7 @@ void mount_fd_event(Manager *m, int events) { * 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(-r)); /* Reset flags, just in case, for later calls */ LIST_FOREACH(units_per_type, meta, m->units_per_type[UNIT_MOUNT]) { @@ -1403,7 +1463,7 @@ void mount_fd_event(Manager *m, int events) { switch (mount->state) { case MOUNT_DEAD: - case MOUNT_MAINTAINANCE: + case MOUNT_MAINTENANCE: mount_enter_mounted(mount, true); break; @@ -1427,55 +1487,15 @@ void mount_fd_event(Manager *m, int events) { } } -int mount_path_is_mounted(Manager *m, const char* path) { - char *t; - int r; +static void mount_reset_maintenance(Unit *u) { + Mount *m = MOUNT(u); 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 (m->state == MOUNT_MAINTENANCE) + mount_set_state(m, MOUNT_DEAD); - 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; + m->failure = false; } static const char* const mount_state_table[_MOUNT_STATE_MAX] = { @@ -1491,7 +1511,7 @@ static const char* const mount_state_table[_MOUNT_STATE_MAX] = { [MOUNT_REMOUNTING_SIGKILL] = "remounting-sigkill", [MOUNT_UNMOUNTING_SIGTERM] = "unmounting-sigterm", [MOUNT_UNMOUNTING_SIGKILL] = "unmounting-sigkill", - [MOUNT_MAINTAINANCE] = "maintainance" + [MOUNT_MAINTENANCE] = "maintenance" }; DEFINE_STRING_TABLE_LOOKUP(mount_state, MountState); @@ -1510,6 +1530,7 @@ const UnitVTable mount_vtable = { .no_alias = true, .no_instances = true, .no_isolate = true, + .show_status = true, .init = mount_init, .load = mount_load, @@ -1534,6 +1555,8 @@ const UnitVTable mount_vtable = { .sigchld_event = mount_sigchld_event, .timer_event = mount_timer_event, + .reset_maintenance = mount_reset_maintenance, + .bus_message_handler = bus_mount_message_handler, .enumerate = mount_enumerate,