X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fcore%2Fswap.c;h=dc6731ab30e00643bf7003090eea7178d9ce18e4;hp=9c72732b9470bfb2f482f7f1a25ad0148b9a565f;hb=13b84ec7df103ce388910a2b868fe1668c1e27ef;hpb=b30e2f4c18ad81b04e4314fd191a5d458553773c diff --git a/src/core/swap.c b/src/core/swap.c index 9c72732b9..dc6731ab3 100644 --- a/src/core/swap.c +++ b/src/core/swap.c @@ -6,16 +6,16 @@ Copyright 2010 Lennart Poettering systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. + Lesser General Public License for more details. - You should have received a copy of the GNU General Public License + You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see . ***/ @@ -38,6 +38,8 @@ #include "bus-errors.h" #include "exit-status.h" #include "def.h" +#include "path-util.h" +#include "virt.h" static const UnitActiveState state_translation_table[_SWAP_STATE_MAX] = { [SWAP_DEAD] = UNIT_INACTIVE, @@ -53,6 +55,7 @@ static const UnitActiveState state_translation_table[_SWAP_STATE_MAX] = { static void swap_unset_proc_swaps(Swap *s) { Swap *first; + Hashmap *swaps; assert(s); @@ -61,14 +64,17 @@ static void swap_unset_proc_swaps(Swap *s) { /* Remove this unit from the chain of swaps which share the * same kernel swap device. */ - - first = hashmap_get(UNIT(s)->manager->swaps_by_proc_swaps, s->parameters_proc_swaps.what); + swaps = UNIT(s)->manager->swaps_by_proc_swaps; + first = hashmap_get(swaps, s->parameters_proc_swaps.what); LIST_REMOVE(Swap, same_proc_swaps, first, s); if (first) - hashmap_remove_and_replace(UNIT(s)->manager->swaps_by_proc_swaps, s->parameters_proc_swaps.what, first->parameters_proc_swaps.what, first); + hashmap_remove_and_replace(swaps, + s->parameters_proc_swaps.what, + first->parameters_proc_swaps.what, + first); else - hashmap_remove(UNIT(s)->manager->swaps_by_proc_swaps, s->parameters_proc_swaps.what); + hashmap_remove(swaps, s->parameters_proc_swaps.what); free(s->parameters_proc_swaps.what); s->parameters_proc_swaps.what = NULL; @@ -85,8 +91,10 @@ static void swap_init(Unit *u) { exec_context_init(&s->exec_context); s->exec_context.std_output = u->manager->default_std_output; s->exec_context.std_error = u->manager->default_std_error; + kill_context_init(&s->kill_context); + cgroup_context_init(&s->cgroup_context); - s->parameters_etc_fstab.priority = s->parameters_proc_swaps.priority = s->parameters_fragment.priority = -1; + s->parameters_proc_swaps.priority = s->parameters_fragment.priority = -1; s->timer_watch.type = WATCH_INVALID; @@ -115,14 +123,15 @@ static void swap_done(Unit *u) { free(s->what); s->what = NULL; - free(s->parameters_etc_fstab.what); free(s->parameters_fragment.what); - s->parameters_etc_fstab.what = s->parameters_fragment.what = NULL; + s->parameters_fragment.what = NULL; - exec_context_done(&s->exec_context); + exec_context_done(&s->exec_context, manager_is_reloading_or_reexecuting(u->manager)); exec_command_done_array(s->exec_command, _SWAP_EXEC_COMMAND_MAX); s->control_command = NULL; + cgroup_context_done(&s->cgroup_context); + swap_unwatch_control_pid(s); unit_unwatch_timer(u, &s->timer_watch); @@ -144,7 +153,8 @@ int swap_add_one_mount_link(Swap *s, Mount *m) { if (!path_startswith(s->what, m->where)) return 0; - if ((r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true)) < 0) + r = unit_add_two_dependencies(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true); + if (r < 0) return r; return 0; @@ -163,34 +173,6 @@ static int swap_add_mount_links(Swap *s) { return 0; } -static int swap_add_target_links(Swap *s) { - Unit *tu; - SwapParameters *p; - int r; - - assert(s); - - if (s->from_fragment) - p = &s->parameters_fragment; - else if (s->from_etc_fstab) - p = &s->parameters_etc_fstab; - else - return 0; - - if ((r = manager_load_unit(UNIT(s)->manager, SPECIAL_SWAP_TARGET, NULL, NULL, &tu)) < 0) - return r; - - if (!p->noauto && - !p->nofail && - (p->handle || UNIT(s)->manager->swap_auto) && - s->from_etc_fstab && - UNIT(s)->manager->running_as == MANAGER_SYSTEM) - if ((r = unit_add_dependency(tu, UNIT_WANTS, UNIT(s), true)) < 0) - return r; - - return unit_add_dependency(UNIT(s), UNIT_BEFORE, tu, true); -} - static int swap_add_device_links(Swap *s) { SwapParameters *p; @@ -201,30 +183,50 @@ static int swap_add_device_links(Swap *s) { if (s->from_fragment) p = &s->parameters_fragment; - else if (s->from_etc_fstab) - p = &s->parameters_etc_fstab; else return 0; if (is_device_path(s->what)) - return unit_add_node_link(UNIT(s), s->what, - !p->noauto && p->nofail && - UNIT(s)->manager->running_as == MANAGER_SYSTEM); + return unit_add_node_link(UNIT(s), s->what, !p->noauto && + UNIT(s)->manager->running_as == SYSTEMD_SYSTEM); else /* File based swap devices need to be ordered after - * remount-rootfs.service, since they might need a + * systemd-remount-fs.service, since they might need a * writable file system. */ - return unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_REMOUNT_ROOTFS_SERVICE, NULL, true); + return unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, NULL, true); } static int swap_add_default_dependencies(Swap *s) { + bool nofail = false, noauto = false; int r; assert(s); - if (UNIT(s)->manager->running_as == MANAGER_SYSTEM) { + if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM) + return 0; + + if (detect_container(NULL) > 0) + return 0; + + r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true); + if (r < 0) + return r; + + if (s->from_fragment) { + SwapParameters *p = &s->parameters_fragment; + + nofail = p->nofail; + noauto = p->noauto; + } - if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true)) < 0) + if (!noauto) { + if (nofail) + r = unit_add_dependency_by_name_inverse(UNIT(s), + UNIT_WANTS, SPECIAL_SWAP_TARGET, NULL, true); + else + r = unit_add_two_dependencies_by_name_inverse(UNIT(s), + UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SWAP_TARGET, NULL, true); + if (r < 0) return r; } @@ -233,24 +235,27 @@ static int swap_add_default_dependencies(Swap *s) { static int swap_verify(Swap *s) { bool b; - char *e; + _cleanup_free_ char *e = NULL; if (UNIT(s)->load_state != UNIT_LOADED) return 0; - if (!(e = unit_name_from_path(s->what, ".swap"))) - return -ENOMEM; + e = unit_name_from_path(s->what, ".swap"); + if (e == NULL) + return log_oom(); b = unit_has_name(UNIT(s), e); - free(e); - if (!b) { - log_error("%s: Value of \"What\" and unit name do not match, not loading.\n", UNIT(s)->id); + log_error_unit(UNIT(s)->id, + "%s: Value of \"What\" and unit name do not match, not loading.", + UNIT(s)->id); return -EINVAL; } - if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) { - log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id); + if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) { + log_error_unit(UNIT(s)->id, + "%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing to load.", + UNIT(s)->id); return -EINVAL; } @@ -265,11 +270,13 @@ static int swap_load(Unit *u) { assert(u->load_state == UNIT_STUB); /* Load a .swap file */ - if ((r = unit_load_fragment_and_dropin_optional(u)) < 0) + r = unit_load_fragment_and_dropin_optional(u); + if (r < 0) return r; if (u->load_state == UNIT_LOADED) { - if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0) + r = unit_add_exec_dependencies(u, &s->exec_context); + if (r < 0) return r; if (UNIT(s)->fragment_path) @@ -278,8 +285,6 @@ static int swap_load(Unit *u) { if (!s->what) { if (s->parameters_fragment.what) s->what = strdup(s->parameters_fragment.what); - else if (s->parameters_etc_fstab.what) - s->what = strdup(s->parameters_etc_fstab.what); else if (s->parameters_proc_swaps.what) s->what = strdup(s->parameters_proc_swaps.what); else @@ -295,53 +300,60 @@ static int swap_load(Unit *u) { if ((r = unit_set_description(u, s->what)) < 0) return r; - if ((r = swap_add_device_links(s)) < 0) - return r; - - if ((r = swap_add_mount_links(s)) < 0) + r = swap_add_device_links(s); + if (r < 0) return r; - if ((r = swap_add_target_links(s)) < 0) + r = swap_add_mount_links(s); + if (r < 0) return r; - if ((r = unit_add_default_cgroups(u)) < 0) + r = unit_add_default_slice(u); + if (r < 0) return r; - if (UNIT(s)->default_dependencies) - if ((r = swap_add_default_dependencies(s)) < 0) + if (UNIT(s)->default_dependencies) { + r = swap_add_default_dependencies(s); + if (r < 0) return r; + } + + r = unit_exec_context_defaults(u, &s->exec_context); + if (r < 0) + return r; } return swap_verify(s); } -int swap_add_one( +static int swap_add_one( Manager *m, const char *what, const char *what_proc_swaps, int priority, bool noauto, bool nofail, - bool handle, bool set_flags) { Unit *u = NULL; - char *e = NULL, *wp = NULL; + _cleanup_free_ char *e = NULL; + char *wp = NULL; bool delete = false; int r; SwapParameters *p; + Swap *first; assert(m); assert(what); + assert(what_proc_swaps); e = unit_name_from_path(what, ".swap"); if (!e) - return -ENOMEM; + return log_oom(); u = manager_get_unit(m, e); - if (what_proc_swaps && - u && + if (u && SWAP(u)->from_proc_swaps && !path_equal(SWAP(u)->parameters_proc_swaps.what, what_proc_swaps)) return -EEXIST; @@ -350,10 +362,8 @@ int swap_add_one( delete = true; u = unit_new(m, sizeof(Swap)); - if (!u) { - free(e); - return -ENOMEM; - } + if (!u) + return log_oom(); r = unit_add_name(u, e); if (r < 0) @@ -361,7 +371,7 @@ int swap_add_one( SWAP(u)->what = strdup(what); if (!SWAP(u)->what) { - r = -ENOMEM; + r = log_oom(); goto fail; } @@ -369,70 +379,53 @@ int swap_add_one( } else delete = false; - if (what_proc_swaps) { - Swap *first; + p = &SWAP(u)->parameters_proc_swaps; - p = &SWAP(u)->parameters_proc_swaps; + if (!p->what) { + wp = strdup(what_proc_swaps); + if (!wp) { + r = log_oom(); + goto fail; + } - if (!p->what) { - if (!(wp = strdup(what_proc_swaps))) { - r = -ENOMEM; + if (!m->swaps_by_proc_swaps) { + m->swaps_by_proc_swaps = hashmap_new(string_hash_func, string_compare_func); + if (!m->swaps_by_proc_swaps) { + r = log_oom(); goto fail; } - - if (!m->swaps_by_proc_swaps) - if (!(m->swaps_by_proc_swaps = hashmap_new(string_hash_func, string_compare_func))) { - r = -ENOMEM; - goto fail; - } - - free(p->what); - p->what = wp; - - first = hashmap_get(m->swaps_by_proc_swaps, wp); - LIST_PREPEND(Swap, same_proc_swaps, first, SWAP(u)); - - if ((r = hashmap_replace(m->swaps_by_proc_swaps, wp, first)) < 0) - goto fail; - } - - if (set_flags) { - SWAP(u)->is_active = true; - SWAP(u)->just_activated = !SWAP(u)->from_proc_swaps; } - SWAP(u)->from_proc_swaps = true; + free(p->what); + p->what = wp; - } else { - p = &SWAP(u)->parameters_etc_fstab; + first = hashmap_get(m->swaps_by_proc_swaps, wp); + LIST_PREPEND(Swap, same_proc_swaps, first, SWAP(u)); - if (!(wp = strdup(what))) { - r = -ENOMEM; + r = hashmap_replace(m->swaps_by_proc_swaps, wp, first); + if (r < 0) goto fail; - } - - free(p->what); - p->what = wp; + } - SWAP(u)->from_etc_fstab = true; + if (set_flags) { + SWAP(u)->is_active = true; + SWAP(u)->just_activated = !SWAP(u)->from_proc_swaps; } + SWAP(u)->from_proc_swaps = true; + p->priority = priority; p->noauto = noauto; p->nofail = nofail; - p->handle = handle; unit_add_to_dbus_queue(u); - free(e); - return 0; fail: - log_warning("Failed to load swap unit: %s", strerror(-r)); + log_warning_unit(e, "Failed to load swap unit: %s", strerror(-r)); free(wp); - free(e); if (delete && u) unit_free(u); @@ -454,11 +447,14 @@ static int swap_process_new_swap(Manager *m, const char *device, int prio, bool /* So this is a proper swap device. Create swap units * for all names this swap device is known under */ - if (!(d = udev_device_new_from_devnum(m->udev, 'b', st.st_rdev))) - return -ENOMEM; + d = udev_device_new_from_devnum(m->udev, 'b', st.st_rdev); + if (!d) + return log_oom(); - if ((dn = udev_device_get_devnode(d))) - r = swap_add_one(m, dn, device, prio, false, false, false, set_flags); + dn = udev_device_get_devnode(d); + /* Skip dn==device, since that case will be handled below */ + if (dn && !streq(dn, device)) + r = swap_add_one(m, dn, device, prio, false, false, set_flags); /* Add additional units for all symlinks */ first = udev_device_get_devlinks_list_entry(d); @@ -472,17 +468,20 @@ static int swap_process_new_swap(Manager *m, const char *device, int prio, bool continue; if (stat(p, &st) >= 0) - if ((!S_ISBLK(st.st_mode)) || st.st_rdev != udev_device_get_devnum(d)) + if ((!S_ISBLK(st.st_mode)) || + st.st_rdev != udev_device_get_devnum(d)) continue; - if ((k = swap_add_one(m, p, device, prio, false, false, false, set_flags)) < 0) + k = swap_add_one(m, p, device, prio, false, false, set_flags); + if (k < 0) r = k; } udev_device_unref(d); } - if ((k = swap_add_one(m, device, device, prio, false, false, false, set_flags)) < 0) + k = swap_add_one(m, device, device, prio, false, false, set_flags); + if (k < 0) r = k; return r; @@ -509,12 +508,14 @@ static void swap_set_state(Swap *s, SwapState state) { } if (state != old_state) - log_debug("%s changed %s -> %s", - UNIT(s)->id, - swap_state_to_string(old_state), - swap_state_to_string(state)); - - unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true); + log_debug_unit(UNIT(s)->id, + "%s changed %s -> %s", + UNIT(s)->id, + swap_state_to_string(old_state), + swap_state_to_string(state)); + + unit_notify(UNIT(s), state_translation_table[old_state], + state_translation_table[state], true); } static int swap_coldplug(Unit *u) { @@ -542,10 +543,12 @@ static int swap_coldplug(Unit *u) { if (s->control_pid <= 0) return -EBADMSG; - if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0) + r = unit_watch_pid(UNIT(s), s->control_pid); + if (r < 0) return r; - if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) + r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch); + if (r < 0) return r; } @@ -567,36 +570,36 @@ static void swap_dump(Unit *u, FILE *f, const char *prefix) { else if (s->from_fragment) p = &s->parameters_fragment; else - p = &s->parameters_etc_fstab; + p = NULL; fprintf(f, "%sSwap State: %s\n" "%sResult: %s\n" "%sWhat: %s\n" - "%sPriority: %i\n" - "%sNoAuto: %s\n" - "%sNoFail: %s\n" - "%sHandle: %s\n" - "%sFrom /etc/fstab: %s\n" "%sFrom /proc/swaps: %s\n" "%sFrom fragment: %s\n", prefix, swap_state_to_string(s->state), prefix, swap_result_to_string(s->result), prefix, s->what, - prefix, p->priority, - prefix, yes_no(p->noauto), - prefix, yes_no(p->nofail), - prefix, yes_no(p->handle), - prefix, yes_no(s->from_etc_fstab), prefix, yes_no(s->from_proc_swaps), prefix, yes_no(s->from_fragment)); + if (p) + fprintf(f, + "%sPriority: %i\n" + "%sNoAuto: %s\n" + "%sNoFail: %s\n", + prefix, p->priority, + prefix, yes_no(p->noauto), + prefix, yes_no(p->nofail)); + if (s->control_pid > 0) fprintf(f, "%sControl PID: %lu\n", prefix, (unsigned long) s->control_pid); exec_context_dump(&s->exec_context, f, prefix); + kill_context_dump(&s->kill_context, f, prefix); } static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) { @@ -607,24 +610,31 @@ static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) { assert(c); assert(_pid); - if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) + unit_realize_cgroup(UNIT(s)); + + r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch); + if (r < 0) goto fail; - if ((r = exec_spawn(c, - NULL, - &s->exec_context, - NULL, 0, - UNIT(s)->manager->environment, - true, - true, - true, - UNIT(s)->manager->confirm_spawn, - UNIT(s)->cgroup_bondings, - UNIT(s)->cgroup_attributes, - &pid)) < 0) + r = exec_spawn(c, + NULL, + &s->exec_context, + NULL, 0, + UNIT(s)->manager->environment, + true, + true, + true, + UNIT(s)->manager->confirm_spawn, + UNIT(s)->manager->cgroup_supported, + UNIT(s)->cgroup_path, + UNIT(s)->id, + NULL, + &pid); + if (r < 0) goto fail; - if ((r = unit_watch_pid(UNIT(s), pid)) < 0) + r = unit_watch_pid(UNIT(s), pid); + if (r < 0) /* FIXME: we need to do something here */ goto fail; @@ -644,6 +654,7 @@ static void swap_enter_dead(Swap *s, SwapResult f) { if (f != SWAP_SUCCESS) s->result = f; + exec_context_tmp_dirs_done(&s->exec_context); swap_set_state(s, s->result != SWAP_SUCCESS ? SWAP_FAILED : SWAP_DEAD); } @@ -658,51 +669,25 @@ static void swap_enter_active(Swap *s, SwapResult f) { static void swap_enter_signal(Swap *s, SwapState state, SwapResult f) { int r; - Set *pid_set = NULL; - bool wait_for_exit = false; assert(s); if (f != SWAP_SUCCESS) s->result = f; - if (s->exec_context.kill_mode != KILL_NONE) { - int sig = (state == SWAP_ACTIVATING_SIGTERM || - state == SWAP_DEACTIVATING_SIGTERM) ? s->exec_context.kill_signal : SIGKILL; - - if (s->control_pid > 0) { - if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH) - - log_warning("Failed to kill control process %li: %m", (long) s->control_pid); - else - wait_for_exit = true; - } - - if (s->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 (s->control_pid > 0) - if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) - goto fail; - - if ((r = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, sig, true, pid_set)) < 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(s), + &s->kill_context, + state != SWAP_ACTIVATING_SIGTERM && state != SWAP_DEACTIVATING_SIGTERM, + -1, + s->control_pid, + false); + if (r < 0) + goto fail; - if (wait_for_exit) { - if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) + if (r > 0) { + r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch); + if (r < 0) goto fail; swap_set_state(s, state); @@ -712,12 +697,10 @@ static void swap_enter_signal(Swap *s, SwapState state, SwapResult f) { return; fail: - log_warning("%s failed to kill processes: %s", UNIT(s)->id, strerror(-r)); + log_warning_unit(UNIT(s)->id, + "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r)); swap_enter_dead(s, SWAP_FAILURE_RESOURCES); - - if (pid_set) - set_free(pid_set); } static void swap_enter_activating(Swap *s) { @@ -730,8 +713,6 @@ static void swap_enter_activating(Swap *s) { if (s->from_fragment) priority = s->parameters_fragment.priority; - else if (s->from_etc_fstab) - priority = s->parameters_etc_fstab.priority; else priority = -1; @@ -760,7 +741,8 @@ static void swap_enter_activating(Swap *s) { swap_unwatch_control_pid(s); - if ((r = swap_spawn(s, s->control_command, &s->control_pid)) < 0) + r = swap_spawn(s, s->control_command, &s->control_pid); + if (r < 0) goto fail; swap_set_state(s, SWAP_ACTIVATING); @@ -768,7 +750,9 @@ static void swap_enter_activating(Swap *s) { return; fail: - log_warning("%s failed to run 'swapon' task: %s", UNIT(s)->id, strerror(-r)); + log_warning_unit(UNIT(s)->id, + "%s failed to run 'swapon' task: %s", + UNIT(s)->id, strerror(-r)); swap_enter_dead(s, SWAP_FAILURE_RESOURCES); } @@ -780,16 +764,17 @@ static void swap_enter_deactivating(Swap *s) { s->control_command_id = SWAP_EXEC_DEACTIVATE; s->control_command = s->exec_command + SWAP_EXEC_DEACTIVATE; - if ((r = exec_command_set( - s->control_command, + r = exec_command_set(s->control_command, "/sbin/swapoff", s->what, - NULL)) < 0) + NULL); + if (r < 0) goto fail; swap_unwatch_control_pid(s); - if ((r = swap_spawn(s, s->control_command, &s->control_pid)) < 0) + r = swap_spawn(s, s->control_command, &s->control_pid); + if (r < 0) goto fail; swap_set_state(s, SWAP_DEACTIVATING); @@ -797,7 +782,9 @@ static void swap_enter_deactivating(Swap *s) { return; fail: - log_warning("%s failed to run 'swapoff' task: %s", UNIT(s)->id, strerror(-r)); + log_warning_unit(UNIT(s)->id, + "%s failed to run 'swapoff' task: %s", + UNIT(s)->id, strerror(-r)); swap_enter_active(s, SWAP_FAILURE_RESOURCES); } @@ -821,6 +808,9 @@ static int swap_start(Unit *u) { assert(s->state == SWAP_DEAD || s->state == SWAP_FAILED); + if (detect_container(NULL) > 0) + return -EPERM; + s->result = SWAP_SUCCESS; swap_enter_activating(s); return 0; @@ -841,6 +831,9 @@ static int swap_stop(Unit *u) { assert(s->state == SWAP_ACTIVATING || s->state == SWAP_ACTIVE); + if (detect_container(NULL) > 0) + return -EPERM; + swap_enter_deactivating(s); return 0; } @@ -861,6 +854,8 @@ static int swap_serialize(Unit *u, FILE *f, FDSet *fds) { if (s->control_command_id >= 0) unit_serialize_item(u, f, "control-command", swap_exec_command_to_string(s->control_command_id)); + exec_context_serialize(&s->exec_context, UNIT(s), f); + return 0; } @@ -873,8 +868,9 @@ static int swap_deserialize_item(Unit *u, const char *key, const char *value, FD if (streq(key, "state")) { SwapState state; - if ((state = swap_state_from_string(value)) < 0) - log_debug("Failed to parse state value %s", value); + state = swap_state_from_string(value); + if (state < 0) + log_debug_unit(u->id, "Failed to parse state value %s", value); else s->deserialized_state = state; } else if (streq(key, "result")) { @@ -882,51 +878,67 @@ static int swap_deserialize_item(Unit *u, const char *key, const char *value, FD f = swap_result_from_string(value); if (f < 0) - log_debug("Failed to parse result value %s", value); + log_debug_unit(u->id, "Failed to parse result value %s", value); else if (f != SWAP_SUCCESS) s->result = f; } else if (streq(key, "control-pid")) { pid_t pid; if (parse_pid(value, &pid) < 0) - log_debug("Failed to parse control-pid value %s", value); + log_debug_unit(u->id, "Failed to parse control-pid value %s", value); else s->control_pid = pid; } else if (streq(key, "control-command")) { SwapExecCommand id; - if ((id = swap_exec_command_from_string(value)) < 0) - log_debug("Failed to parse exec-command value %s", value); + id = swap_exec_command_from_string(value); + if (id < 0) + log_debug_unit(u->id, "Failed to parse exec-command value %s", value); else { s->control_command_id = id; s->control_command = s->exec_command + id; } + } else if (streq(key, "tmp-dir")) { + char *t; + + t = strdup(value); + if (!t) + return log_oom(); + + s->exec_context.tmp_dir = t; + } else if (streq(key, "var-tmp-dir")) { + char *t; + + t = strdup(value); + if (!t) + return log_oom(); + s->exec_context.var_tmp_dir = t; } else - log_debug("Unknown serialization key '%s'", key); + log_debug_unit(u->id, "Unknown serialization key '%s'", key); return 0; } -static UnitActiveState swap_active_state(Unit *u) { +_pure_ static UnitActiveState swap_active_state(Unit *u) { assert(u); return state_translation_table[SWAP(u)->state]; } -static const char *swap_sub_state_to_string(Unit *u) { +_pure_ static const char *swap_sub_state_to_string(Unit *u) { assert(u); return swap_state_to_string(SWAP(u)->state); } -static bool swap_check_gc(Unit *u) { +_pure_ static bool swap_check_gc(Unit *u) { Swap *s = SWAP(u); assert(s); - return s->from_etc_fstab || s->from_proc_swaps; + return s->from_proc_swaps; } static void swap_sigchld_event(Unit *u, pid_t pid, int code, int status) { @@ -941,7 +953,7 @@ static void swap_sigchld_event(Unit *u, pid_t pid, int code, int status) { s->control_pid = 0; - if (is_clean_exit(code, status)) + if (is_clean_exit(code, status, NULL)) f = SWAP_SUCCESS; else if (code == CLD_EXITED) f = SWAP_FAILURE_EXIT_CODE; @@ -962,8 +974,10 @@ static void swap_sigchld_event(Unit *u, pid_t pid, int code, int status) { s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; } - log_full(f == SWAP_SUCCESS ? LOG_DEBUG : LOG_NOTICE, - "%s swap process exited, code=%s status=%i", u->id, sigchld_code_to_string(code), status); + log_full_unit(f == SWAP_SUCCESS ? LOG_DEBUG : LOG_NOTICE, + u->id, + "%s swap process exited, code=%s status=%i", + u->id, sigchld_code_to_string(code), status); switch (s->state) { @@ -1009,38 +1023,38 @@ static void swap_timer_event(Unit *u, uint64_t elapsed, Watch *w) { switch (s->state) { case SWAP_ACTIVATING: - log_warning("%s activation timed out. Stopping.", u->id); + log_warning_unit(u->id, "%s activation timed out. Stopping.", u->id); swap_enter_signal(s, SWAP_ACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); break; case SWAP_DEACTIVATING: - log_warning("%s deactivation timed out. Stopping.", u->id); + log_warning_unit(u->id, "%s deactivation timed out. Stopping.", u->id); swap_enter_signal(s, SWAP_DEACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); break; case SWAP_ACTIVATING_SIGTERM: - if (s->exec_context.send_sigkill) { - log_warning("%s activation timed out. Killing.", u->id); + if (s->kill_context.send_sigkill) { + log_warning_unit(u->id, "%s activation timed out. Killing.", u->id); swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); } else { - log_warning("%s activation timed out. Skipping SIGKILL. Ignoring.", u->id); + log_warning_unit(u->id, "%s activation timed out. Skipping SIGKILL. Ignoring.", u->id); swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); } break; case SWAP_DEACTIVATING_SIGTERM: - if (s->exec_context.send_sigkill) { - log_warning("%s deactivation timed out. Killing.", u->id); + if (s->kill_context.send_sigkill) { + log_warning_unit(u->id, "%s deactivation timed out. Killing.", u->id); swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); } else { - log_warning("%s deactivation timed out. Skipping SIGKILL. Ignoring.", u->id); + log_warning_unit(u->id, "%s deactivation timed out. Skipping SIGKILL. Ignoring.", u->id); swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); } break; case SWAP_ACTIVATING_SIGKILL: case SWAP_DEACTIVATING_SIGKILL: - log_warning("%s swap process still around after SIGKILL. Ignoring.", u->id); + log_warning_unit(u->id, "%s swap process still around after SIGKILL. Ignoring.", u->id); swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); break; @@ -1060,34 +1074,29 @@ static int swap_load_proc_swaps(Manager *m, bool set_flags) { (void) fscanf(m->proc_swaps, "%*s %*s %*s %*s %*s\n"); for (i = 1;; i++) { - char *dev = NULL, *d; + _cleanup_free_ char *dev = NULL, *d = NULL; int prio = 0, k; - if ((k = fscanf(m->proc_swaps, - "%ms " /* device/file */ - "%*s " /* type of swap */ - "%*s " /* swap size */ - "%*s " /* used */ - "%i\n", /* priority */ - &dev, &prio)) != 2) { - + k = fscanf(m->proc_swaps, + "%ms " /* device/file */ + "%*s " /* type of swap */ + "%*s " /* swap size */ + "%*s " /* used */ + "%i\n", /* priority */ + &dev, &prio); + if (k != 2) { if (k == EOF) break; - log_warning("Failed to parse /proc/swaps:%u.", i); - free(dev); + log_warning("Failed to parse /proc/swaps:%u", i); continue; } d = cunescape(dev); - free(dev); - if (!d) return -ENOMEM; k = swap_process_new_swap(m, d, prio, set_flags); - free(d); - if (k < 0) r = k; } @@ -1113,7 +1122,8 @@ int swap_fd_event(Manager *m, int events) { assert(m); assert(events & EPOLLPRI); - if ((r = swap_load_proc_swaps(m, true)) < 0) { + r = swap_load_proc_swaps(m, true); + if (r < 0) { log_error("Failed to reread /proc/swaps: %s", strerror(-r)); /* Reset flags, just in case, for late calls */ @@ -1249,27 +1259,27 @@ static void swap_shutdown(Manager *m) { static int swap_enumerate(Manager *m) { int r; - struct epoll_event ev; assert(m); if (!m->proc_swaps) { - if (!(m->proc_swaps = fopen("/proc/swaps", "re"))) + struct epoll_event ev = { + .events = EPOLLPRI, + .data.ptr = &m->swap_watch, + }; + + m->proc_swaps = fopen("/proc/swaps", "re"); + if (!m->proc_swaps) return (errno == ENOENT) ? 0 : -errno; m->swap_watch.type = WATCH_SWAP; m->swap_watch.fd = fileno(m->proc_swaps); - zero(ev); - ev.events = EPOLLPRI; - ev.data.ptr = &m->swap_watch; - if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->swap_watch.fd, &ev) < 0) return -errno; } - /* We rely on mount.c to load /etc/fstab for us */ - - if ((r = swap_load_proc_swaps(m, false)) < 0) + r = swap_load_proc_swaps(m, false); + if (r < 0) swap_shutdown(m); return r; @@ -1286,51 +1296,8 @@ static void swap_reset_failed(Unit *u) { s->result = SWAP_SUCCESS; } -static int swap_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) { - Swap *s = SWAP(u); - int r = 0; - Set *pid_set = NULL; - - assert(s); - - if (who == KILL_MAIN) { - dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "Swap units have no main processes"); - return -ESRCH; - } - - if (s->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 (s->control_pid > 0) - if (kill(s->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 (s->control_pid > 0) - if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) { - r = q; - goto finish; - } - - if ((q = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, signo, false, pid_set)) < 0) - if (q != -EAGAIN && q != -ESRCH && q != -ENOENT) - r = q; - } - -finish: - if (pid_set) - set_free(pid_set); - - return r; +static int swap_kill(Unit *u, KillWho who, int signo, DBusError *error) { + return unit_kill_common(u, who, signo, -1, SWAP(u)->control_pid, error); } static const char* const swap_state_table[_SWAP_STATE_MAX] = { @@ -1366,16 +1333,19 @@ static const char* const swap_result_table[_SWAP_RESULT_MAX] = { DEFINE_STRING_TABLE_LOOKUP(swap_result, SwapResult); const UnitVTable swap_vtable = { - .suffix = ".swap", .object_size = sizeof(Swap), + .sections = "Unit\0" "Swap\0" "Install\0", + .private_section = "Swap", + .exec_context_offset = offsetof(Swap, exec_context), + .cgroup_context_offset = offsetof(Swap, cgroup_context), + .no_alias = true, .no_instances = true, - .show_status = true, .init = swap_init, .load = swap_load, @@ -1406,10 +1376,30 @@ const UnitVTable swap_vtable = { .bus_interface = "org.freedesktop.systemd1.Swap", .bus_message_handler = bus_swap_message_handler, .bus_invalidating_properties = bus_swap_invalidating_properties, + .bus_set_property = bus_swap_set_property, + .bus_commit_properties = bus_swap_commit_properties, .following = swap_following, .following_set = swap_following_set, .enumerate = swap_enumerate, - .shutdown = swap_shutdown + .shutdown = swap_shutdown, + + .status_message_formats = { + .starting_stopping = { + [0] = "Activating swap %s...", + [1] = "Deactivating swap %s...", + }, + .finished_start_job = { + [JOB_DONE] = "Activated swap %s.", + [JOB_FAILED] = "Failed to activate swap %s.", + [JOB_DEPENDENCY] = "Dependency failed for %s.", + [JOB_TIMEOUT] = "Timed out activating swap %s.", + }, + .finished_stop_job = { + [JOB_DONE] = "Deactivated swap %s.", + [JOB_FAILED] = "Failed deactivating swap %s.", + [JOB_TIMEOUT] = "Timed out deactivating swap %s.", + }, + }, };