From: Lennart Poettering Date: Thu, 31 May 2012 17:46:42 +0000 (+0200) Subject: logind: properly clean up user cgroups when they run empty X-Git-Tag: v185~27 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8c8c43515cee56dfc2298998a9e5958308c46f99;p=systemd logind: properly clean up user cgroups when they run empty --- diff --git a/src/login/logind-session.c b/src/login/logind-session.c index 5c8d5493..58514ea0 100644 --- a/src/login/logind-session.c +++ b/src/login/logind-session.c @@ -88,7 +88,7 @@ void session_free(Session *s) { } if (s->cgroup_path) - hashmap_remove(s->manager->cgroups, s->cgroup_path); + hashmap_remove(s->manager->session_cgroups, s->cgroup_path); free(s->cgroup_path); strv_free(s->controllers); @@ -527,7 +527,7 @@ static int session_create_cgroup(Session *s) { } } - hashmap_put(s->manager->cgroups, s->cgroup_path, s); + hashmap_put(s->manager->session_cgroups, s->cgroup_path, s); return 0; } @@ -646,7 +646,7 @@ static int session_terminate_cgroup(Session *s) { STRV_FOREACH(k, s->user->manager->controllers) cg_trim(*k, s->cgroup_path, true); - hashmap_remove(s->manager->cgroups, s->cgroup_path); + hashmap_remove(s->manager->session_cgroups, s->cgroup_path); free(s->cgroup_path); s->cgroup_path = NULL; diff --git a/src/login/logind-user.c b/src/login/logind-user.c index b971845e..8bd77308 100644 --- a/src/login/logind-user.c +++ b/src/login/logind-user.c @@ -75,6 +75,8 @@ void user_free(User *u) { while (u->sessions) session_free(u->sessions); + if (u->cgroup_path) + hashmap_remove(u->manager->user_cgroups, u->cgroup_path); free(u->cgroup_path); free(u->service); @@ -313,6 +315,8 @@ static int user_create_cgroup(User *u) { log_warning("Failed to create cgroup %s:%s: %s", *k, p, strerror(-r)); } + hashmap_put(u->manager->user_cgroups, u->cgroup_path, u); + return 0; } @@ -417,6 +421,8 @@ static int user_terminate_cgroup(User *u) { STRV_FOREACH(k, u->manager->controllers) cg_trim(*k, u->cgroup_path, true); + hashmap_remove(u->manager->user_cgroups, u->cgroup_path); + free(u->cgroup_path); u->cgroup_path = NULL; diff --git a/src/login/logind.c b/src/login/logind.c index 632987c8..62f7914f 100644 --- a/src/login/logind.c +++ b/src/login/logind.c @@ -64,13 +64,16 @@ Manager *manager_new(void) { m->inhibitors = hashmap_new(string_hash_func, string_compare_func); m->buttons = hashmap_new(string_hash_func, string_compare_func); - m->cgroups = hashmap_new(string_hash_func, string_compare_func); + m->user_cgroups = hashmap_new(string_hash_func, string_compare_func); + m->session_cgroups = hashmap_new(string_hash_func, string_compare_func); + m->session_fds = hashmap_new(trivial_hash_func, trivial_compare_func); m->inhibitor_fds = hashmap_new(trivial_hash_func, trivial_compare_func); m->button_fds = hashmap_new(trivial_hash_func, trivial_compare_func); if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || - !m->cgroups || !m->session_fds || !m->inhibitor_fds || !m->button_fds) { + !m->user_cgroups || !m->session_cgroups || + !m->session_fds || !m->inhibitor_fds || !m->button_fds) { manager_free(m); return NULL; } @@ -131,7 +134,9 @@ void manager_free(Manager *m) { hashmap_free(m->inhibitors); hashmap_free(m->buttons); - hashmap_free(m->cgroups); + hashmap_free(m->user_cgroups); + hashmap_free(m->session_cgroups); + hashmap_free(m->session_fds); hashmap_free(m->inhibitor_fds); hashmap_free(m->button_fds); @@ -1008,7 +1013,7 @@ int manager_get_session_by_cgroup(Manager *m, const char *cgroup, Session **sess assert(cgroup); assert(session); - s = hashmap_get(m->cgroups, cgroup); + s = hashmap_get(m->session_cgroups, cgroup); if (s) { *session = s; return 1; @@ -1032,7 +1037,7 @@ int manager_get_session_by_cgroup(Manager *m, const char *cgroup, Session **sess *e = 0; - s = hashmap_get(m->cgroups, p); + s = hashmap_get(m->session_cgroups, p); if (s) { free(p); *session = s; @@ -1041,6 +1046,47 @@ int manager_get_session_by_cgroup(Manager *m, const char *cgroup, Session **sess } } +int manager_get_user_by_cgroup(Manager *m, const char *cgroup, User **user) { + User *u; + char *p; + + assert(m); + assert(cgroup); + assert(user); + + u = hashmap_get(m->user_cgroups, cgroup); + if (u) { + *user = u; + return 1; + } + + p = strdup(cgroup); + if (!p) { + log_error("Out of memory."); + return -ENOMEM; + } + + for (;;) { + char *e; + + e = strrchr(p, '/'); + if (!e || e == p) { + free(p); + *user = NULL; + return 0; + } + + *e = 0; + + u = hashmap_get(m->user_cgroups, p); + if (u) { + free(p); + *user = u; + return 1; + } + } +} + int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session) { char *p; int r; @@ -1061,13 +1107,16 @@ int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session) { void manager_cgroup_notify_empty(Manager *m, const char *cgroup) { Session *s; + User *u; int r; r = manager_get_session_by_cgroup(m, cgroup, &s); - if (r <= 0) - return; + if (r > 0) + session_add_to_gc_queue(s); - session_add_to_gc_queue(s); + r = manager_get_user_by_cgroup(m, cgroup, &u); + if (r > 0) + user_add_to_gc_queue(u); } static void manager_dispatch_other(Manager *m, int fd) { diff --git a/src/login/logind.h b/src/login/logind.h index 6fcef6f3..5e828bf0 100644 --- a/src/login/logind.h +++ b/src/login/logind.h @@ -81,7 +81,9 @@ struct Manager { unsigned long session_counter; unsigned long inhibit_counter; - Hashmap *cgroups; + Hashmap *session_cgroups; + Hashmap *user_cgroups; + Hashmap *session_fds; Hashmap *inhibitor_fds; Hashmap *button_fds; @@ -146,6 +148,7 @@ void manager_gc(Manager *m, bool drop_not_started); int manager_get_idle_hint(Manager *m, dual_timestamp *t); +int manager_get_user_by_cgroup(Manager *m, const char *cgroup, User **user); int manager_get_session_by_cgroup(Manager *m, const char *cgroup, Session **session); int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session);