X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fcore%2Fmount.c;h=634dff19a978a28ccf554eaae940ec4517ad4b54;hp=b597e9bfe2232358e8cd080d47413eb09d4d5da9;hb=290837072b136624f1f3d941c7274e4b1b275021;hpb=92a39ae1989a7583d696afd4c89990aea802e9ea diff --git a/src/core/mount.c b/src/core/mount.c index b597e9bfe..634dff19a 100644 --- a/src/core/mount.c +++ b/src/core/mount.c @@ -25,11 +25,13 @@ #include #include +#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" @@ -57,35 +59,130 @@ static const UnitActiveState state_translation_table[_MOUNT_STATE_MAX] = { [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 = DEFAULT_TIMEOUT_USEC; + m->timeout_usec = u->manager->default_timeout_start_usec; m->directory_mode = 0755; exec_context_init(&m->exec_context); - /* The stdio/kmsg bridge socket is on /, in order to avoid a - * dep loop, don't use kmsg logging for -.mount */ - if (!unit_has_name(u, "-.mount")) { + 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; } + kill_context_init(&m->kill_context); + cgroup_context_init(&m->cgroup_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.same_pgrp = true; - m->timer_watch.type = WATCH_INVALID; - m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; - UNIT(m)->ignore_on_isolate = true; + 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, now(CLOCK_MONOTONIC) + m->timeout_usec, 0, mount_dispatch_timer, m, &m->timer_event_source); } static void mount_unwatch_control_pid(Mount *m) { @@ -116,95 +213,91 @@ static void mount_done(Unit *u) { 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); + cgroup_context_done(&m->cgroup_context); + exec_context_done(&m->exec_context, manager_is_reloading_or_reexecuting(u->manager)); 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); + m->timer_event_source = sd_event_source_unref(m->timer_event_source); } -static MountParameters* get_mount_parameters_configured(Mount *m) { +_pure_ static MountParameters* get_mount_parameters_fragment(Mount *m) { assert(m); if (m->from_fragment) return &m->parameters_fragment; - else if (m->from_etc_fstab) - return &m->parameters_etc_fstab; return NULL; } -static MountParameters* get_mount_parameters(Mount *m) { +_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_configured(m); + 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; - MountParameters *pm; assert(m); - pm = get_mount_parameters_configured(m); - - /* Adds in links to other mount points that might lie below or - * above us in the hierarchy */ - - LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_MOUNT]) { - Mount *n = MOUNT(other); - MountParameters *pn; - - if (n == m) - continue; - - if (UNIT(n)->load_state != UNIT_LOADED) - continue; - - pn = get_mount_parameters_configured(n); - - if (path_startswith(m->where, n->where)) { - - if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 0) - return r; - - if (pn) - if ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0) - return r; - - } else if (path_startswith(n->where, m->where)) { + 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; - if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0) - return r; + r = unit_require_mounts_for(UNIT(m), parent); + if (r < 0) + return r; + } - if (pm) - if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 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)) { - } else if (pm && pm->what && path_startswith(pm->what, n->where)) { + r = unit_require_mounts_for(UNIT(m), pm->what); + if (r < 0) + return r; + } - if ((r = unit_add_dependency(UNIT(m), UNIT_AFTER, UNIT(n), true)) < 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 ((r = unit_add_dependency(UNIT(m), UNIT_REQUIRES, UNIT(n), true)) < 0) - return r; + if (other->load_state != UNIT_LOADED) + continue; - } else if (pn && pn->what && path_startswith(pn->what, m->where)) { + if (other == UNIT(m)) + continue; - if ((r = unit_add_dependency(UNIT(n), UNIT_AFTER, UNIT(m), true)) < 0) - return r; + r = unit_add_dependency(other, UNIT_AFTER, UNIT(m), true); + if (r < 0) + return r; - if ((r = unit_add_dependency(UNIT(n), UNIT_REQUIRES, UNIT(m), true)) < 0) + 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; } } @@ -212,285 +305,131 @@ static int mount_add_mount_links(Mount *m) { return 0; } -static int mount_add_swap_links(Mount *m) { - Unit *other; +static int mount_add_device_links(Mount *m) { + MountParameters *p; + bool device_wants_mount = false; int r; assert(m); - LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_SWAP]) - if ((r = swap_add_one_mount_link(SWAP(other), m)) < 0) - return r; - - return 0; -} - -static int mount_add_path_links(Mount *m) { - Unit *other; - int r; + p = get_mount_parameters_fragment(m); + if (!p) + return 0; - assert(m); + if (!p->what) + return 0; - LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_PATH]) - if ((r = path_add_one_mount_link(PATH(other), m)) < 0) - return r; + if (mount_is_bind(p)) + return 0; - return 0; -} + if (!is_device_path(p->what)) + return 0; -static int mount_add_automount_links(Mount *m) { - Unit *other; - int r; + if (path_equal(m->where, "/")) + return 0; - assert(m); + if (mount_is_auto(p) && UNIT(m)->manager->running_as == SYSTEMD_SYSTEM) + device_wants_mount = true; - LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_AUTOMOUNT]) - if ((r = automount_add_one_mount_link(AUTOMOUNT(other), m)) < 0) - return r; + r = unit_add_node_link(UNIT(m), p->what, device_wants_mount); + if (r < 0) + return r; return 0; } -static int mount_add_socket_links(Mount *m) { - Unit *other; +static int mount_add_quota_links(Mount *m) { int r; + MountParameters *p; assert(m); - LIST_FOREACH(units_by_type, other, UNIT(m)->manager->units_by_type[UNIT_SOCKET]) - if ((r = socket_add_one_mount_link(SOCKET(other), m)) < 0) - return r; + if (UNIT(m)->manager->running_as != SYSTEMD_SYSTEM) + return 0; - return 0; -} + p = get_mount_parameters_fragment(m); + if (!p) + return 0; -static int mount_add_requires_mounts_links(Mount *m) { - Unit *other; - int r; + if (!needs_quota(p)) + return 0; - assert(m); + r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true); + if (r < 0) + return r; - LIST_FOREACH(has_requires_mounts_for, other, UNIT(m)->manager->has_requires_mounts_for) { - r = unit_add_one_mount_link(other, m); - 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 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 NULL; - - zero(me); - me.mnt_opts = (char*) haystack; - - 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; - - return false; -} - -static bool needs_quota(MountParameters *p) { - assert(p); +static bool should_umount(Mount *m) { + MountParameters *p; - if (mount_is_network(p)) + if (path_equal(m->where, "/") || + path_equal(m->where, "/usr")) return false; - if (mount_is_bind(p)) + p = get_mount_parameters(m); + if (p && mount_test_option(p->options, "x-initrd.mount") && + !in_initrd()) 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"); + return true; } -static int mount_add_fstab_links(Mount *m) { - const char *target, *after, *tu_wants = NULL; +static int mount_add_default_dependencies(Mount *m) { + const char *after, *after2, *online; MountParameters *p; - Unit *tu; int r; - bool noauto, nofail, automount; assert(m); - if (UNIT(m)->manager->running_as != MANAGER_SYSTEM) + if (UNIT(m)->manager->running_as != SYSTEMD_SYSTEM) return 0; - if (!(p = get_mount_parameters_configured(m))) - return 0; + p = get_mount_parameters(m); - if (p != &m->parameters_etc_fstab) + if (!p) return 0; - noauto = !!mount_test_option(p->options, "noauto"); - nofail = !!mount_test_option(p->options, "nofail"); - automount = - mount_test_option(p->options, "comment=systemd.automount") || - mount_test_option(p->options, "x-systemd.automount"); + if (path_equal(m->where, "/")) + return 0; if (mount_is_network(p)) { - target = SPECIAL_REMOTE_FS_TARGET; - after = tu_wants = SPECIAL_REMOTE_FS_PRE_TARGET; + after = SPECIAL_REMOTE_FS_PRE_TARGET; + after2 = SPECIAL_NETWORK_TARGET; + online = SPECIAL_NETWORK_ONLINE_TARGET; } else { - target = SPECIAL_LOCAL_FS_TARGET; after = SPECIAL_LOCAL_FS_PRE_TARGET; + after2 = NULL; + online = NULL; } - r = manager_load_unit(UNIT(m)->manager, target, NULL, NULL, &tu); + r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true); if (r < 0) return r; - if (tu_wants) { - r = unit_add_dependency_by_name(tu, UNIT_WANTS, tu_wants, NULL, true); + if (after2) { + r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after2, NULL, true); if (r < 0) return r; } - if (after) { - r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, after, NULL, true); + if (online) { + r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_WANTS, UNIT_AFTER, online, NULL, true); if (r < 0) return r; } - if (automount) { - Unit *am; - - if ((r = unit_load_related_unit(UNIT(m), ".automount", &am)) < 0) - return r; - - /* If auto is configured as well also pull in the - * mount right-away, but don't rely on it. */ - if (!noauto) /* automount + auto */ - if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true)) < 0) - return r; - - /* Install automount unit */ - if (!nofail) /* automount + fail */ - return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, am, true); - else /* automount + nofail */ - return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_WANTS, am, true); - - } else if (!noauto) { - - /* Automatically add mount points that aren't natively - * configured to local-fs.target */ - - if (!nofail) /* auto + fail */ - return unit_add_two_dependencies(tu, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true); - else /* auto + nofail */ - return unit_add_dependency(tu, UNIT_WANTS, UNIT(m), true); - } - - return 0; -} - -static int mount_add_device_links(Mount *m) { - MountParameters *p; - int r; - - assert(m); - - if (!(p = get_mount_parameters_configured(m))) - return 0; - - if (!p->what) - return 0; - - if (!mount_is_bind(p) && - !path_equal(m->where, "/") && - p == &m->parameters_etc_fstab) { - bool nofail, noauto; - - noauto = !!mount_test_option(p->options, "noauto"); - nofail = !!mount_test_option(p->options, "nofail"); - - if ((r = unit_add_node_link(UNIT(m), p->what, - !noauto && nofail && - UNIT(m)->manager->running_as == MANAGER_SYSTEM)) < 0) - return r; - } - - if (p->passno > 0 && - !mount_is_bind(p) && - UNIT(m)->manager->running_as == MANAGER_SYSTEM && - !path_equal(m->where, "/")) { - char *name; - Unit *fsck; - /* Let's add in the fsck service */ - - /* aka SPECIAL_FSCK_SERVICE */ - if (!(name = unit_name_from_path_instance("fsck", p->what, ".service"))) - return -ENOMEM; - - if ((r = manager_load_unit_prepare(UNIT(m)->manager, name, NULL, NULL, &fsck)) < 0) { - log_warning("Failed to prepare unit %s: %s", name, strerror(-r)); - free(name); - return r; - } - - free(name); - - SERVICE(fsck)->fsck_passno = p->passno; - - if ((r = unit_add_two_dependencies(UNIT(m), UNIT_AFTER, UNIT_REQUIRES, fsck, true)) < 0) - return r; - } - - return 0; -} - -static int mount_add_default_dependencies(Mount *m) { - int r; - MountParameters *p; - - assert(m); - - if (UNIT(m)->manager->running_as != MANAGER_SYSTEM) - return 0; - - p = get_mount_parameters_configured(m); - if (p && needs_quota(p)) { - if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTACHECK_SERVICE, NULL, true)) < 0 || - (r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_WANTS, SPECIAL_QUOTAON_SERVICE, NULL, true)) < 0) + 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; } - if (!path_equal(m->where, "/")) - if ((r = unit_add_two_dependencies_by_name(UNIT(m), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0) - return r; - return 0; } @@ -505,7 +444,8 @@ static int mount_fix_timeouts(Mount *m) { assert(m); - if (!(p = get_mount_parameters_configured(m))) + p = get_mount_parameters_fragment(m); + if (!p) return 0; /* Allow configuration how long we wait for a device that @@ -524,11 +464,13 @@ static int mount_fix_timeouts(Mount *m) { if (!t) return -ENOMEM; - r = parse_usec(t, &u); + r = parse_sec(t, &u); free(t); if (r < 0) { - log_warning("Failed to parse timeout for %s, ignoring: %s", m->where, timeout); + log_warning_unit(UNIT(m)->id, + "Failed to parse timeout for %s, ignoring: %s", + m->where, timeout); return r; } @@ -543,111 +485,130 @@ static int mount_fix_timeouts(Mount *m) { } static int mount_verify(Mount *m) { + _cleanup_free_ char *e = NULL; bool b; - char *e; + assert(m); if (UNIT(m)->load_state != UNIT_LOADED) return 0; - if (!m->from_etc_fstab && !m->from_fragment && !m->from_proc_self_mountinfo) + if (!m->from_fragment && !m->from_proc_self_mountinfo) return -ENOENT; - if (!(e = unit_name_from_path(m->where, ".mount"))) + e = unit_name_from_path(m->where, ".mount"); + if (!e) 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)->id); + 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("Cannot create mount unit for API file system %s. Refusing.", 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("%s's What setting is missing. Refusing.", UNIT(m)->id); + 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->exec_context.kill_mode != KILL_CONTROL_GROUP) { - log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(m)->id); + 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_load(Unit *u) { - Mount *m = MOUNT(u); +static int mount_add_extras(Mount *m) { + Unit *u = UNIT(m); int r; - assert(u); - assert(u->load_state == UNIT_STUB); + if (UNIT(m)->fragment_path) + m->from_fragment = true; - if ((r = unit_load_fragment_and_dropin_optional(u)) < 0) - return r; + if (!m->where) { + m->where = unit_name_to_path(u->id); + if (!m->where) + return -ENOMEM; + } - /* This is a new unit? Then let's add in some extras */ - if (u->load_state == UNIT_LOADED) { - if ((r = unit_add_exec_dependencies(u, &m->exec_context)) < 0) - return r; + path_kill_slashes(m->where); - if (UNIT(m)->fragment_path) - m->from_fragment = true; - else if (m->from_etc_fstab) - /* We always add several default dependencies to fstab mounts, - * but we do not want the implicit complementing of Wants= with After= - * in the target unit that this mount unit will be hooked into. */ - UNIT(m)->default_dependencies = false; + r = unit_add_exec_dependencies(u, &m->exec_context); + if (r < 0) + return r; - if (!m->where) - if (!(m->where = unit_name_to_path(u->id))) - return -ENOMEM; + if (!UNIT(m)->description) { + r = unit_set_description(u, m->where); + if (r < 0) + return r; + } - path_kill_slashes(m->where); + r = mount_add_device_links(m); + if (r < 0) + return r; - if (!UNIT(m)->description) - if ((r = unit_set_description(u, m->where)) < 0) - return r; + r = mount_add_mount_links(m); + if (r < 0) + return r; - if ((r = mount_add_device_links(m)) < 0) - return r; + r = mount_add_quota_links(m); + if (r < 0) + return r; - if ((r = mount_add_mount_links(m)) < 0) + if (UNIT(m)->default_dependencies) { + r = mount_add_default_dependencies(m); + if (r < 0) return r; + } - if ((r = mount_add_socket_links(m)) < 0) - return r; + r = unit_add_default_slice(u); + if (r < 0) + return r; - if ((r = mount_add_swap_links(m)) < 0) - return r; + r = mount_fix_timeouts(m); + if (r < 0) + return r; - if ((r = mount_add_path_links(m)) < 0) - return r; + return 0; +} - r = mount_add_requires_mounts_links(m); - if (r < 0) - return r; +static int mount_load(Unit *u) { + Mount *m = MOUNT(u); + int r; - if ((r = mount_add_automount_links(m)) < 0) - return r; + assert(u); + assert(u->load_state == UNIT_STUB); - if ((r = mount_add_fstab_links(m)) < 0) - return r; + if (m->from_proc_self_mountinfo) + r = unit_load_fragment_and_dropin_optional(u); + else + r = unit_load_fragment_and_dropin(u); - if (UNIT(m)->default_dependencies || m->from_etc_fstab) - if ((r = mount_add_default_dependencies(m)) < 0) - return r; + if (r < 0) + return r; - if ((r = unit_add_default_cgroups(u)) < 0) + /* 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; - mount_fix_timeouts(m); + r = unit_exec_context_defaults(u, &m->exec_context); + if (r < 0) + return r; } return mount_verify(m); @@ -687,7 +648,7 @@ static void mount_set_state(Mount *m, MountState state) { state != MOUNT_UNMOUNTING_SIGKILL && state != MOUNT_REMOUNTING_SIGTERM && state != MOUNT_REMOUNTING_SIGKILL) { - unit_unwatch_timer(UNIT(m), &m->timer_watch); + 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; @@ -704,14 +665,17 @@ static void mount_set_state(Mount *m, MountState state) { state == MOUNT_REMOUNTING_SIGKILL || state == MOUNT_UNMOUNTING_SIGTERM || state == MOUNT_UNMOUNTING_SIGKILL || - state == MOUNT_FAILED) - mount_notify_automount(m, -ENODEV); + state == MOUNT_FAILED) { + if (state != old_state) + mount_notify_automount(m, -ENODEV); + } if (state != old_state) - log_debug("%s changed %s -> %s", - UNIT(m)->id, - mount_state_to_string(old_state), - mount_state_to_string(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; @@ -730,32 +694,33 @@ static int mount_coldplug(Unit *u) { 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 (new_state == m->state) + return 0; - if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0) - return r; - } + 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; - mount_set_state(m, new_state); + r = mount_arm_timer(m); + if (r < 0) + return r; } + mount_set_state(m, new_state); return 0; } @@ -775,17 +740,15 @@ static void mount_dump(Unit *u, FILE *f, const char *prefix) { "%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" "%sDirectoryMode: %04o\n", prefix, mount_state_to_string(m->state), prefix, mount_result_to_string(m->result), prefix, m->where, - prefix, strna(p->what), - prefix, strna(p->fstype), - prefix, strna(p->options), - prefix, yes_no(m->from_etc_fstab), + 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); @@ -796,6 +759,7 @@ static void mount_dump(Unit *u, FILE *f, const char *prefix) { prefix, (unsigned long) 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) { @@ -806,26 +770,31 @@ static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) { assert(c); assert(_pid); - if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0) + unit_realize_cgroup(UNIT(m)); + + r = mount_arm_timer(m); + if (r < 0) goto fail; - if ((r = exec_spawn(c, - NULL, - &m->exec_context, - NULL, 0, - UNIT(m)->manager->environment, - true, - true, - true, - UNIT(m)->manager->confirm_spawn, - UNIT(m)->cgroup_bondings, - UNIT(m)->cgroup_attributes, - NULL, - NULL, - &pid)) < 0) + 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, + NULL, + &pid); + if (r < 0) goto fail; - if ((r = unit_watch_pid(UNIT(m), pid)) < 0) + r = unit_watch_pid(UNIT(m), pid); + if (r < 0) /* FIXME: we need to do something here */ goto fail; @@ -834,7 +803,7 @@ static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) { return 0; fail: - unit_unwatch_timer(UNIT(m), &m->timer_watch); + m->timer_event_source = sd_event_source_unref(m->timer_event_source); return r; } @@ -845,6 +814,7 @@ static void mount_enter_dead(Mount *m, MountResult f) { if (f != MOUNT_SUCCESS) m->result = f; + exec_context_tmp_dirs_done(&m->exec_context); mount_set_state(m, m->result != MOUNT_SUCCESS ? MOUNT_FAILED : MOUNT_DEAD); } @@ -859,53 +829,25 @@ static void mount_enter_mounted(Mount *m, MountResult f) { static void mount_enter_signal(Mount *m, MountState state, MountResult f) { int r; - Set *pid_set = NULL; - bool wait_for_exit = false; assert(m); if (f != MOUNT_SUCCESS) m->result = f; - if (m->exec_context.kill_mode != KILL_NONE) { - int sig = (state == MOUNT_MOUNTING_SIGTERM || - state == MOUNT_UNMOUNTING_SIGTERM || - state == MOUNT_REMOUNTING_SIGTERM) ? m->exec_context.kill_signal : SIGKILL; - - if (m->control_pid > 0) { - if (kill_and_sigcont(m->control_pid, sig) < 0 && errno != ESRCH) - - log_warning("Failed to kill control process %li: %m", (long) m->control_pid); - else - wait_for_exit = true; - } - - if (m->exec_context.kill_mode == KILL_CONTROL_GROUP) { - - if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) { - r = -ENOMEM; - goto fail; - } - - /* Exclude the control pid from being killed via the cgroup */ - if (m->control_pid > 0) - if ((r = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) - goto fail; - - r = cgroup_bonding_kill_list(UNIT(m)->cgroup_bondings, sig, true, false, pid_set, NULL); - if (r < 0) { - if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) - log_warning("Failed to kill control group: %s", strerror(-r)); - } else if (r > 0) - wait_for_exit = true; - - set_free(pid_set); - pid_set = NULL; - } - } + 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 (wait_for_exit) { - if ((r = unit_watch_timer(UNIT(m), m->timeout_usec, &m->timer_watch)) < 0) + if (r > 0) { + r = mount_arm_timer(m); + if (r < 0) goto fail; mount_set_state(m, state); @@ -917,15 +859,29 @@ static void mount_enter_signal(Mount *m, MountState state, MountResult f) { return; fail: - log_warning("%s failed to kill processes: %s", UNIT(m)->id, strerror(-r)); + 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; - if (pid_set) - set_free(pid_set); + 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) { @@ -953,7 +909,9 @@ static void mount_enter_unmounting(Mount *m) { return; fail: - log_warning("%s failed to run 'umount' task: %s", UNIT(m)->id, strerror(-r)); + 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); } @@ -966,12 +924,14 @@ 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); + 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_configured(m); + p = get_mount_parameters_fragment(m); if (p && mount_is_bind(p)) - mkdir_p(p->what, m->directory_mode); + mkdir_p_label(p->what, m->directory_mode); if (m->from_fragment) r = exec_command_set( @@ -982,12 +942,6 @@ static void mount_enter_mounting(Mount *m) { "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto", 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; @@ -996,7 +950,8 @@ static void mount_enter_mounting(Mount *m) { mount_unwatch_control_pid(m); - if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0) + r = mount_spawn(m, m->control_command, &m->control_pid); + if (r < 0) goto fail; mount_set_state(m, MOUNT_MOUNTING); @@ -1004,16 +959,12 @@ static void mount_enter_mounting(Mount *m) { return; fail: - log_warning("%s failed to run 'mount' task: %s", UNIT(m)->id, strerror(-r)); + 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_mounting_done(Mount *m) { - assert(m); - - mount_set_state(m, MOUNT_MOUNTING_DONE); -} - static void mount_enter_remounting(Mount *m) { int r; @@ -1023,17 +974,11 @@ static void mount_enter_remounting(Mount *m) { 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 + if (m->parameters_fragment.options) + o = strappenda("remount,", m->parameters_fragment.options); + else o = "remount"; r = exec_command_set( @@ -1044,16 +989,7 @@ static void mount_enter_remounting(Mount *m) { "-t", m->parameters_fragment.fstype ? m->parameters_fragment.fstype : "auto", "-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 + } else r = -ENOENT; if (r < 0) @@ -1061,7 +997,8 @@ static void mount_enter_remounting(Mount *m) { mount_unwatch_control_pid(m); - if ((r = mount_spawn(m, m->control_command, &m->control_pid)) < 0) + r = mount_spawn(m, m->control_command, &m->control_pid); + if (r < 0) goto fail; mount_set_state(m, MOUNT_REMOUNTING); @@ -1069,7 +1006,9 @@ static void mount_enter_remounting(Mount *m) { return; fail: - log_warning("%s failed to run 'remount' task: %s", UNIT(m)->id, strerror(-r)); + 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); } @@ -1156,6 +1095,8 @@ static int mount_serialize(Unit *u, FILE *f, FDSet *fds) { if (m->control_command_id >= 0) unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(m->control_command_id)); + exec_context_serialize(&m->exec_context, UNIT(m), f); + return 0; } @@ -1171,7 +1112,7 @@ static int mount_deserialize_item(Unit *u, const char *key, const char *value, F MountState state; if ((state = mount_state_from_string(value)) < 0) - log_debug("Failed to parse state value %s", value); + log_debug_unit(u->id, "Failed to parse state value %s", value); else m->deserialized_state = state; } else if (streq(key, "result")) { @@ -1179,7 +1120,8 @@ static int mount_deserialize_item(Unit *u, const char *key, const char *value, F f = mount_result_from_string(value); if (f < 0) - log_debug("Failed to parse result value %s", value); + log_debug_unit(UNIT(m)->id, + "Failed to parse result value %s", value); else if (f != MOUNT_SUCCESS) m->result = f; @@ -1188,7 +1130,8 @@ static int mount_deserialize_item(Unit *u, const char *key, const char *value, F f = mount_result_from_string(value); if (f < 0) - log_debug("Failed to parse reload result value %s", value); + log_debug_unit(UNIT(m)->id, + "Failed to parse reload result value %s", value); else if (f != MOUNT_SUCCESS) m->reload_result = f; @@ -1196,43 +1139,61 @@ static int mount_deserialize_item(Unit *u, const char *key, const char *value, F pid_t pid; if (parse_pid(value, &pid) < 0) - log_debug("Failed to parse control-pid value %s", value); + 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("Failed to parse exec-command value %s", value); + 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 if (streq(key, "tmp-dir")) { + char *t; + t = strdup(value); + if (!t) + return log_oom(); + + m->exec_context.tmp_dir = t; + } else if (streq(key, "var-tmp-dir")) { + char *t; + + t = strdup(value); + if (!t) + return log_oom(); + + m->exec_context.var_tmp_dir = t; } else - log_debug("Unknown serialization key '%s'", key); + log_debug_unit(UNIT(m)->id, + "Unknown serialization key '%s'", key); return 0; } -static UnitActiveState mount_active_state(Unit *u) { +_pure_ 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) { +_pure_ 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) { +_pure_ static bool mount_check_gc(Unit *u) { Mount *m = MOUNT(u); assert(m); - return m->from_etc_fstab || m->from_proc_self_mountinfo; + return m->from_proc_self_mountinfo; } static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) { @@ -1247,7 +1208,7 @@ static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) { m->control_pid = 0; - if (is_clean_exit(code, status)) + if (is_clean_exit(code, status, NULL)) f = MOUNT_SUCCESS; else if (code == CLD_EXITED) f = MOUNT_FAILURE_EXIT_CODE; @@ -1268,8 +1229,9 @@ static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) { m->control_command_id = _MOUNT_EXEC_COMMAND_INVALID; } - log_full(f == MOUNT_SUCCESS ? LOG_DEBUG : LOG_NOTICE, - "%s mount process exited, code=%s status=%i", u->id, sigchld_code_to_string(code), status); + 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 @@ -1325,38 +1287,43 @@ static void mount_sigchld_event(Unit *u, pid_t pid, int code, int status) { unit_add_to_dbus_queue(u); } -static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) { - Mount *m = MOUNT(u); +static int mount_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { + Mount *m = MOUNT(userdata); assert(m); - assert(elapsed == 1); - assert(w == &m->timer_watch); + assert(m->timer_event_source == source); switch (m->state) { case MOUNT_MOUNTING: case MOUNT_MOUNTING_DONE: - log_warning("%s mounting timed out. Stopping.", u->id); + 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("%s remounting timed out. Stopping.", u->id); + 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("%s unmounting timed out. Stopping.", u->id); + 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->exec_context.send_sigkill) { - log_warning("%s mounting timed out. Killing.", u->id); + 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("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->id); + 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); @@ -1366,11 +1333,14 @@ static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) { break; case MOUNT_REMOUNTING_SIGTERM: - if (m->exec_context.send_sigkill) { - log_warning("%s remounting timed out. Killing.", u->id); + 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("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->id); + 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); @@ -1380,11 +1350,14 @@ static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) { break; case MOUNT_UNMOUNTING_SIGTERM: - if (m->exec_context.send_sigkill) { - log_warning("%s unmounting timed out. Killing.", u->id); + 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("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->id); + 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); @@ -1396,7 +1369,9 @@ static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) { case MOUNT_MOUNTING_SIGKILL: case MOUNT_REMOUNTING_SIGKILL: case MOUNT_UNMOUNTING_SIGKILL: - log_warning("%s mount process still around after SIGKILL. Ignoring.", u->id); + 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); @@ -1407,6 +1382,8 @@ static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) { default: assert_not_reached("Timeout at wrong time."); } + + return 0; } static int mount_add_one( @@ -1415,14 +1392,13 @@ static int mount_add_one( const char *where, const char *options, const char *fstype, - int passno, - bool from_proc_self_mountinfo, bool set_flags) { int r; Unit *u; bool delete; char *e, *w = NULL, *o = NULL, *f = NULL; MountParameters *p; + bool load_extras = false; assert(m); assert(what); @@ -1430,8 +1406,6 @@ static int mount_add_one( 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) || mount_point_ignore(where)) @@ -1450,6 +1424,9 @@ static int mount_add_one( u = manager_get_unit(m, e); if (!u) { + const char* const target = + fstype_is_network(fstype) ? SPECIAL_REMOTE_FS_TARGET : SPECIAL_LOCAL_FS_TARGET; + delete = true; u = unit_new(m, sizeof(Mount)); @@ -1470,10 +1447,43 @@ static int mount_add_one( goto fail; } + u->source_path = strdup("/proc/self/mountinfo"); + if (!u->source_path) { + r = -ENOMEM; + goto fail; + } + + 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; free(e); + + 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)) || @@ -1483,21 +1493,15 @@ static int mount_add_one( 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; + 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; @@ -1507,7 +1511,11 @@ static int mount_add_one( free(p->fstype); p->fstype = f; - p->passno = passno; + if (load_extras) { + r = mount_add_extras(MOUNT(u)); + if (r < 0) + goto fail; + } unit_add_to_dbus_queue(u); @@ -1524,171 +1532,67 @@ fail: return r; } -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 = 0; - struct mntent* me; - - assert(m); - - errno = 0; - f = setmntent("/etc/fstab", "r"); - if (!f) - return errno == ENOENT ? 0 : -errno; - - while ((me = getmntent(f))) { - char *where, *what; - int k; - - 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) - k = pri; - else - k = swap_add_one(m, - what, - NULL, - pri, - !!mount_test_option(me->mnt_opts, "noauto"), - !!mount_test_option(me->mnt_opts, "nofail"), - false); - } else - k = mount_add_one(m, what, where, me->mnt_opts, me->mnt_type, me->mnt_passno, false, false); - - free(what); - free(where); - - if (k < 0) - r = k; - } - -finish: - - endmntent(f); - return r; -} - static int mount_load_proc_self_mountinfo(Manager *m, bool set_flags) { int r = 0; unsigned i; - char *device, *path, *options, *options2, *fstype, *d, *p, *o; 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; - device = path = options = options2 = fstype = d = p = o = 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) 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)) != 5) { - - if (k == EOF) - break; - + 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); - goto clean_up; + continue; } - o = join(options, ",", options2, NULL); - if (!o) { - r = -ENOMEM; - goto finish; - } + o = strjoin(options, ",", options2, NULL); + if (!o) + return log_oom(); - if (!(d = cunescape(device)) || - !(p = cunescape(path))) { - r = -ENOMEM; - goto finish; - } + d = cunescape(device); + p = cunescape(path); + if (!d || !p) + return log_oom(); - if ((k = mount_add_one(m, d, p, o, fstype, 0, true, set_flags)) < 0) + k = mount_add_one(m, d, p, o, fstype, set_flags); + if (k < 0) r = k; - -clean_up: - free(device); - free(path); - free(options); - free(options2); - free(fstype); - free(d); - free(p); - free(o); } -finish: - free(device); - free(path); - free(options); - free(options2); - free(fstype); - free(d); - free(p); - free(o); - 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; @@ -1697,28 +1601,27 @@ static void mount_shutdown(Manager *m) { 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"))) + m->proc_self_mountinfo = fopen("/proc/self/mountinfo", "re"); + if (!m->proc_self_mountinfo) return -errno; - m->mount_watch.type = WATCH_MOUNT; - m->mount_watch.fd = fileno(m->proc_self_mountinfo); - - zero(ev); - ev.events = EPOLLPRI; - ev.data.ptr = &m->mount_watch; + r = sd_event_add_io(m->event, fileno(m->proc_self_mountinfo), EPOLLPRI, mount_dispatch_io, m, &m->mount_event_source); + if (r < 0) + goto fail; - if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->mount_watch.fd, &ev) < 0) - return -errno; + /* Dispatch this before we dispatch SIGCHLD, so that + * we always get the events from /proc/self/mountinfo + * before the SIGCHLD of /bin/mount. */ + r = sd_event_source_set_priority(m->mount_event_source, -10); + if (r < 0) + goto fail; } - if ((r = mount_load_etc_fstab(m)) < 0) - goto fail; - - if ((r = mount_load_proc_self_mountinfo(m, false)) < 0) + r = mount_load_proc_self_mountinfo(m, false); + if (r < 0) goto fail; return 0; @@ -1728,18 +1631,20 @@ fail: return r; } -void mount_fd_event(Manager *m, int events) { +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(events & EPOLLPRI); + 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 */ - if ((r = mount_load_proc_self_mountinfo(m, true)) < 0) { + 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 */ @@ -1749,7 +1654,7 @@ void mount_fd_event(Manager *m, int events) { mount->is_mounted = mount->just_mounted = mount->just_changed = false; } - return; + return 0; } manager_dispatch_load_queue(m); @@ -1786,7 +1691,7 @@ void mount_fd_event(Manager *m, int events) { break; case MOUNT_MOUNTING: - mount_enter_mounting_done(mount); + mount_set_state(mount, MOUNT_MOUNTING_DONE); break; default: @@ -1803,6 +1708,8 @@ void mount_fd_event(Manager *m, int events) { /* 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) { @@ -1817,52 +1724,8 @@ static void mount_reset_failed(Unit *u) { m->reload_result = MOUNT_SUCCESS; } -static int mount_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) { - Mount *m = MOUNT(u); - int r = 0; - Set *pid_set = NULL; - - assert(m); - - if (who == KILL_MAIN) { - dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Mount units have no main processes"); - return -ESRCH; - } - - if (m->control_pid <= 0 && who == KILL_CONTROL) { - dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); - return -ESRCH; - } - - if (who == KILL_CONTROL || who == KILL_ALL) - if (m->control_pid > 0) - if (kill(m->control_pid, signo) < 0) - r = -errno; - - if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) { - int q; - - if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) - return -ENOMEM; - - /* Exclude the control pid from being killed via the cgroup */ - if (m->control_pid > 0) - if ((q = set_put(pid_set, LONG_TO_PTR(m->control_pid))) < 0) { - r = q; - goto finish; - } - - q = cgroup_bonding_kill_list(UNIT(m)->cgroup_bondings, signo, false, false, pid_set, NULL); - if (q < 0) - if (q != -EAGAIN && q != -ESRCH && q != -ENOENT) - r = q; - } - -finish: - if (pid_set) - set_free(pid_set); - - return r; +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] = { @@ -1903,12 +1766,16 @@ static const char* const mount_result_table[_MOUNT_RESULT_MAX] = { DEFINE_STRING_TABLE_LOOKUP(mount_result, MountResult); const UnitVTable mount_vtable = { - .suffix = ".mount", .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), + .sections = "Unit\0" "Mount\0" "Install\0", + .private_section = "Mount", .no_alias = true, .no_instances = true, @@ -1936,13 +1803,14 @@ const UnitVTable mount_vtable = { .check_gc = mount_check_gc, .sigchld_event = mount_sigchld_event, - .timer_event = mount_timer_event, .reset_failed = mount_reset_failed, .bus_interface = "org.freedesktop.systemd1.Mount", - .bus_message_handler = bus_mount_message_handler, - .bus_invalidating_properties = bus_mount_invalidating_properties, + .bus_vtable = bus_mount_vtable, + .bus_changing_properties = bus_mount_changing_properties, + .bus_set_property = bus_mount_set_property, + .bus_commit_properties = bus_mount_commit_properties, .enumerate = mount_enumerate, .shutdown = mount_shutdown,