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cgroup: there's no point in labelling cgroupfs dirs, so let's not do that

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This allows us to get rid of the dep on libsystemd-label for cgroup
management.

https://bugs.freedesktop.org/show_bug.cgi?id=69966
This commit is contained in:
Lennart Poettering 2013-10-02 04:54:07 +02:00
parent fbd8ebddbe
commit 1434ae6fd4
3 changed files with 41 additions and 81 deletions
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1
Makefile.am
View File

@ -767,7 +767,6 @@ noinst_LTLIBRARIES += \
libsystemd-label.la
libsystemd_label_la_SOURCES = \
src/shared/cgroup-label.c \
src/shared/socket-label.c \
src/shared/label.c \
src/shared/label.h \

80
src/shared/cgroup-label.c
View File

@ -1,80 +0,0 @@
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 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 <errno.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <stdlib.h>
#include <dirent.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <ftw.h>
#include "cgroup-util.h"
#include "log.h"
#include "set.h"
#include "macro.h"
#include "util.h"
#include "mkdir.h"
/* This is split out since it needs label calls, either directly or
* indirectly. */
int cg_create(const char *controller, const char *path) {
_cleanup_free_ char *fs = NULL;
int r;
r = cg_get_path_and_check(controller, path, NULL, &fs);
if (r < 0)
return r;
r = mkdir_parents_prefix_label("/sys/fs/cgroup", fs, 0755);
if (r < 0)
return r;
if (mkdir(fs, 0755) < 0) {
if (errno == EEXIST)
return 0;
return -errno;
}
return 1;
}
int cg_create_and_attach(const char *controller, const char *path, pid_t pid) {
int r, q;
assert(pid >= 0);
r = cg_create(controller, path);
if (r < 0)
return r;
q = cg_attach(controller, path, pid);
if (q < 0)
return q;
/* This does not remove the cgroup on failure */
return r;
}

41
src/shared/cgroup-util.c
View File

@ -39,6 +39,7 @@
#include "unit-name.h"
#include "fileio.h"
#include "special.h"
#include "mkdir.h"
int cg_enumerate_processes(const char *controller, const char *path, FILE **_f) {
_cleanup_free_ char *fs = NULL;
@ -618,6 +619,46 @@ int cg_delete(const char *controller, const char *path) {
return r == -ENOENT ? 0 : r;
}
int cg_create(const char *controller, const char *path) {
_cleanup_free_ char *fs = NULL;
int r;
r = cg_get_path_and_check(controller, path, NULL, &fs);
if (r < 0)
return r;
r = mkdir_parents(fs, 0755);
if (r < 0)
return r;
if (mkdir(fs, 0755) < 0) {
if (errno == EEXIST)
return 0;
return -errno;
}
return 1;
}
int cg_create_and_attach(const char *controller, const char *path, pid_t pid) {
int r, q;
assert(pid >= 0);
r = cg_create(controller, path);
if (r < 0)
return r;
q = cg_attach(controller, path, pid);
if (q < 0)
return q;
/* This does not remove the cgroup on failure */
return r;
}
int cg_attach(const char *controller, const char *path, pid_t pid) {
_cleanup_free_ char *fs = NULL;
char c[DECIMAL_STR_MAX(pid_t) + 2];