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authorLennart Poettering <lennart@poettering.net>2010-03-31 16:29:55 +0200
committerLennart Poettering <lennart@poettering.net>2010-03-31 16:29:55 +0200
commit8e27452380193a5f81bfd08a59aab8b07008ba0b (patch)
tree7ea3398a0cff784e5c45416bec5104597aaa3625 /mount-setup.c
parentc9dae904f3a07ae563bd58fb2b39529c1f108915 (diff)
cgroup: add cgroupsification
Diffstat (limited to 'mount-setup.c')
-rw-r--r--mount-setup.c112
1 files changed, 112 insertions, 0 deletions
diff --git a/mount-setup.c b/mount-setup.c
new file mode 100644
index 0000000000..4a5e2cc760
--- /dev/null
+++ b/mount-setup.c
@@ -0,0 +1,112 @@
+/*-*- Mode: C; c-basic-offset: 8 -*-*/
+
+/***
+ 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 General Public License as published by
+ the Free Software Foundation; either version 2 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.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <sys/mount.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <stdlib.h>
+#include <string.h>
+#include <libgen.h>
+#include <assert.h>
+
+#include "mount-setup.h"
+#include "log.h"
+
+enum {
+ MOUNT_WHAT,
+ MOUNT_WHERE,
+ MOUNT_TYPE,
+ MOUNT_OPTIONS,
+ MOUNT_SKIP
+};
+
+static const char *table[] = {
+ "/proc", "/proc", "proc", "rw",
+ "/sys", "/sys", "sysfs", "rw",
+ "cgroup", "/cgroup/debug", "cgroup", "debug",
+ NULL
+};
+
+static int is_mount_point(const char *t) {
+ struct stat a, b;
+ char *copy;
+
+ if (lstat(t, &a) < 0) {
+
+ if (errno == ENOENT)
+ return 0;
+
+ return -errno;
+ }
+
+ if (!(copy = strdup(t)))
+ return -ENOMEM;
+
+ if (lstat(dirname(copy), &b) < 0) {
+ free(copy);
+ return -errno;
+ }
+
+ free(copy);
+
+ return a.st_dev != b.st_dev;
+
+}
+
+static int mount_one(const char *t[]) {
+ int r;
+
+ assert(t);
+
+ if ((r = is_mount_point(t[MOUNT_WHERE])) < 0)
+ return r;
+
+ if (r > 0)
+ return 0;
+
+ log_debug("Mounting %s to %s of type %s with options %s.",
+ t[MOUNT_WHAT],
+ t[MOUNT_WHERE],
+ t[MOUNT_TYPE],
+ t[MOUNT_OPTIONS]);
+
+ if (mount(t[MOUNT_WHAT],
+ t[MOUNT_WHERE],
+ t[MOUNT_TYPE],
+ 0,
+ t[MOUNT_OPTIONS]) < 0) {
+ log_error("Failed to mount %s: %s", t[MOUNT_WHERE], strerror(errno));
+ return -errno;
+ }
+
+ return 0;
+}
+
+int mount_setup(void) {
+ int r;
+ const char **t;
+
+ for (t = table; *t; t += MOUNT_SKIP)
+ if ((r = mount_one(t)) < 0)
+ return r;
+
+ return 0;
+}