/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2011 Lennart Poettering systemd is free software; you can redistribute it and/or modify it 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include "cgroup-attr.h" #include "cgroup-util.h" #include "list.h" #include "fileio.h" int cgroup_attribute_apply(CGroupAttribute *a, CGroupBonding *b) { _cleanup_free_ char *path = NULL, *v = NULL; int r; assert(a); b = cgroup_bonding_find_list(b, a->controller); if (!b) return 0; if (a->semantics && a->semantics->map_write) { r = a->semantics->map_write(a->semantics, a->value, &v); if (r < 0) return r; } r = cg_get_path(a->controller, b->path, a->name, &path); if (r < 0) return r; r = write_string_file(path, v ? v : a->value); if (r < 0) log_warning("Failed to write '%s' to %s: %s", v ? v : a->value, path, strerror(-r)); return r; } int cgroup_attribute_apply_list(CGroupAttribute *first, CGroupBonding *b) { CGroupAttribute *a; int r = 0; LIST_FOREACH(by_unit, a, first) { int k; k = cgroup_attribute_apply(a, b); if (r == 0) r = k; } return r; } bool cgroup_attribute_matches(CGroupAttribute *a, const char *controller, const char *name) { assert(a); if (controller) { if (streq(a->controller, controller) && (!name || streq(a->name, name))) return true; } else if (!name) return true; else if (streq(a->name, name)) { size_t x, y; x = strlen(a->controller); y = strlen(name); if (y > x && memcmp(a->controller, name, x) == 0 && name[x] == '.') return true; } return false; } CGroupAttribute *cgroup_attribute_find_list( CGroupAttribute *first, const char *controller, const char *name) { CGroupAttribute *a; assert(name); LIST_FOREACH(by_unit, a, first) if (cgroup_attribute_matches(a, controller, name)) return a; return NULL; } void cgroup_attribute_free(CGroupAttribute *a) { assert(a); if (a->unit) LIST_REMOVE(CGroupAttribute, by_unit, a->unit->cgroup_attributes, a); free(a->controller); free(a->name); free(a->value); free(a); } void cgroup_attribute_free_list(CGroupAttribute *first) { CGroupAttribute *a, *n; LIST_FOREACH_SAFE(by_unit, a, n, first) cgroup_attribute_free(a); } void cgroup_attribute_free_some(CGroupAttribute *first, const char *controller, const char *name) { CGroupAttribute *a, *n; LIST_FOREACH_SAFE(by_unit, a, n, first) if (cgroup_attribute_matches(a, controller, name)) cgroup_attribute_free(a); }