133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "cgroup-attr.h"
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#include "cgroup-util.h"
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#include "list.h"
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#include "fileio.h"
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int cgroup_attribute_apply(CGroupAttribute *a, CGroupBonding *b) {
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_cleanup_free_ char *path = NULL, *v = NULL;
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int r;
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assert(a);
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b = cgroup_bonding_find_list(b, a->controller);
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if (!b)
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return 0;
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if (a->semantics && a->semantics->map_write) {
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r = a->semantics->map_write(a->semantics, a->value, &v);
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if (r < 0)
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return r;
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}
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r = cg_get_path(a->controller, b->path, a->name, &path);
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if (r < 0)
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return r;
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r = write_string_file(path, v ? v : a->value);
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if (r < 0)
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log_warning("Failed to write '%s' to %s: %s", v ? v : a->value, path, strerror(-r));
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return r;
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}
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int cgroup_attribute_apply_list(CGroupAttribute *first, CGroupBonding *b) {
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CGroupAttribute *a;
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int r = 0;
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LIST_FOREACH(by_unit, a, first) {
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int k;
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k = cgroup_attribute_apply(a, b);
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if (r == 0)
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r = k;
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}
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return r;
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}
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bool cgroup_attribute_matches(CGroupAttribute *a, const char *controller, const char *name) {
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assert(a);
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if (controller) {
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if (streq(a->controller, controller) && (!name || streq(a->name, name)))
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return true;
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} else if (!name)
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return true;
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else if (streq(a->name, name)) {
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size_t x, y;
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x = strlen(a->controller);
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y = strlen(name);
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if (y > x &&
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memcmp(a->controller, name, x) == 0 &&
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name[x] == '.')
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return true;
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}
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return false;
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}
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CGroupAttribute *cgroup_attribute_find_list(
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CGroupAttribute *first,
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const char *controller,
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const char *name) {
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CGroupAttribute *a;
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assert(name);
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LIST_FOREACH(by_unit, a, first)
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if (cgroup_attribute_matches(a, controller, name))
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return a;
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return NULL;
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}
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void cgroup_attribute_free(CGroupAttribute *a) {
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assert(a);
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if (a->unit)
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LIST_REMOVE(CGroupAttribute, by_unit, a->unit->cgroup_attributes, a);
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free(a->controller);
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free(a->name);
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free(a->value);
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free(a);
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}
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void cgroup_attribute_free_list(CGroupAttribute *first) {
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CGroupAttribute *a, *n;
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LIST_FOREACH_SAFE(by_unit, a, n, first)
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cgroup_attribute_free(a);
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}
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void cgroup_attribute_free_some(CGroupAttribute *first, const char *controller, const char *name) {
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CGroupAttribute *a, *n;
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LIST_FOREACH_SAFE(by_unit, a, n, first)
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if (cgroup_attribute_matches(a, controller, name))
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cgroup_attribute_free(a);
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}
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