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-rw-r--r--lib/libufs/cgroup.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/lib/libufs/cgroup.c b/lib/libufs/cgroup.c
new file mode 100644
index 000000000000..2948e618aeb6
--- /dev/null
+++ b/lib/libufs/cgroup.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2003 Juli Mallett. All rights reserved.
+ *
+ * This software was written by Juli Mallett <jmallett@FreeBSD.org> for the
+ * FreeBSD project. Redistribution and use in source and binary forms, with
+ * or without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * 1. Redistribution of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistribution in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/mount.h>
+#include <sys/disklabel.h>
+#include <sys/stat.h>
+
+#include <ufs/ufs/ufsmount.h>
+#include <ufs/ufs/dinode.h>
+#include <ufs/ffs/fs.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <libufs.h>
+
+int
+cgread(struct uufsd *disk)
+{
+ return cgread1(disk, disk->d_ccg++);
+}
+
+int
+cgread1(struct uufsd *disk, int c)
+{
+ struct fs *fs;
+ off_t ccg;
+
+ fs = &disk->d_fs;
+
+ if (c >= fs->fs_ncg) {
+ return 0;
+ }
+ ccg = fsbtodb(fs, cgtod(fs, c)) * disk->d_bsize;
+ if (bread(disk, fsbtodb(fs, cgtod(fs, c)), disk->d_cgunion.d_buf,
+ fs->fs_bsize) == -1) {
+ ERROR(disk, "unable to read cylinder group");
+ return -1;
+ }
+ return 1;
+}