linux-kernel - [PATCH 17/44 take 2] [UBI] build unit header

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Date:	Sat, 17 Feb 2007 18:55:50 +0200
From:	Artem Bityutskiy <dedekind@...radead.org>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Artem Bityutskiy <dedekind@...radead.org>,
	Frank Haverkamp <haver@...t.ibm.com>,
	Josh Boyer <jwboyer@...ux.vnet.ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	David Woodhouse <dwmw2@...radead.org>
Subject: [PATCH 17/44 take 2] [UBI] build unit header

diff -auNrp tmp-from/drivers/mtd/ubi/build.h tmp-to/drivers/mtd/ubi/build.h
--- tmp-from/drivers/mtd/ubi/build.h	1970-01-01 02:00:00.000000000 +0200
+++ tmp-to/drivers/mtd/ubi/build.h	2007-02-17 18:07:26.000000000 +0200
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Artem B. Bityutskiy
+ */
+
+/*
+ * UBI build unit.
+ *
+ * This unit is responsible for attaching MTD devices to UBI devices. At the
+ * moment there is only one attachment method exists - full scan. But in future
+ * one may add a superblock-based attachment method and improve UBI
+ * scalability. But anyways, the scanning method will always be useful because
+ * in case of superblock corruptions UBI can always scan the device and
+ * re-build all the core data structures.
+ */
+
+#ifndef __UBI_BUILD_H__
+#define __UBI_BUILD_H__
+
+struct ubi_info;
+
+/**
+ * ubi_bld_attach_mtd_dev - attach an MTD device.
+ *
+ * @ubi: the UBI device description object
+ * @mtd_num: MTD device number
+ * @vid_hdr_offset: volume identifier headers offset
+ * @data_offset: data offset
+ *
+ * This function attaches an MTD device number @mtd_num. If @vid_hdr_offset and
+ * @data_offset are zero, the default layout of UBI headers is assumed. See the
+ * I/O unit.
+ *
+ * This function returns a positive number of the new UBI device in case of
+ * success and a negative error code in case of failure.
+ */
+int ubi_bld_attach_mtd_dev(struct ubi_info *ubi, int mtd_num,
+			   int vid_hdr_offset, int data_offset);
+
+/**
+ * ubi_bld_detach_mtd_dev - detach an MTD device.
+ *
+ * @ubi: the UBI device description object
+ */
+void ubi_bld_detach_mtd_dev(struct ubi_info *ubi);
+
+#endif /* __UBI_BUILD_H__ */
-
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