Add support for the exFAT file system, fix hangs on older intel hardware and update AUFSpck-4.3.3-gnu

1 files changed, 197 insertions, 0 deletions

diff --git a/fs/exfat/exfat_blkdev.c b/fs/exfat/exfat_blkdev.c
new file mode 100644
index 000000000..02fa4fe18
--- /dev/null
+++ b/fs/exfat/exfat_blkdev.c
@@ -0,0 +1,197 @@
+/*
+ *  Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
+ *
+ *  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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+/************************************************************************/
+/*                                                                      */
+/*  PROJECT : exFAT & FAT12/16/32 File System                           */
+/*  FILE    : exfat_blkdev.c                                            */
+/*  PURPOSE : exFAT Block Device Driver Glue Layer                      */
+/*                                                                      */
+/*----------------------------------------------------------------------*/
+/*  NOTES                                                               */
+/*                                                                      */
+/*----------------------------------------------------------------------*/
+/*  REVISION HISTORY (Ver 0.9)                                          */
+/*                                                                      */
+/*  - 2010.11.15 [Joosun Hahn] : first writing                          */
+/*                                                                      */
+/************************************************************************/
+
+#include <linux/blkdev.h>
+#include <linux/log2.h>
+#include "exfat_config.h"
+#include "exfat_blkdev.h"
+#include "exfat_data.h"
+#include "exfat_api.h"
+#include "exfat_super.h"
+
+/*----------------------------------------------------------------------*/
+/*  Constant & Macro Definitions                                        */
+/*----------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------*/
+/*  Global Variable Definitions                                         */
+/*----------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------*/
+/*  Local Variable Definitions                                          */
+/*----------------------------------------------------------------------*/
+
+/*======================================================================*/
+/*  Function Definitions                                                */
+/*======================================================================*/
+
+s32 bdev_init(void)
+{
+	return FFS_SUCCESS;
+}
+
+s32 bdev_shutdown(void)
+{
+	return FFS_SUCCESS;
+}
+
+s32 bdev_open(struct super_block *sb)
+{
+	BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+	if (p_bd->opened)
+		return FFS_SUCCESS;
+
+	p_bd->sector_size      = bdev_logical_block_size(sb->s_bdev);
+	p_bd->sector_size_bits = ilog2(p_bd->sector_size);
+	p_bd->sector_size_mask = p_bd->sector_size - 1;
+	p_bd->num_sectors      = i_size_read(sb->s_bdev->bd_inode) >> p_bd->sector_size_bits;
+
+	p_bd->opened = TRUE;
+
+	return FFS_SUCCESS;
+}
+
+s32 bdev_close(struct super_block *sb)
+{
+	BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info);
+
+	if (!p_bd->opened)
+		return FFS_SUCCESS;
+
+	p_bd->opened = FALSE;
+	return FFS_SUCCESS;
+}
+
+s32 bdev_read(struct super_block *sb, u32 secno, struct buffer_head **bh, u32 num_secs, s32 read)
+{
+	BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info);
+	FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+	struct exfat_sb_info *sbi = EXFAT_SB(sb);
+	long flags = sbi->debug_flags;
+
+	if (flags & EXFAT_DEBUGFLAGS_ERROR_RW)
+		return FFS_MEDIAERR;
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+
+	if (!p_bd->opened)
+		return FFS_MEDIAERR;
+
+	if (*bh)
+		__brelse(*bh);
+
+	if (read)
+		*bh = __bread(sb->s_bdev, secno, num_secs << p_bd->sector_size_bits);
+	else
+		*bh = __getblk(sb->s_bdev, secno, num_secs << p_bd->sector_size_bits);
+
+	if (*bh)
+		return FFS_SUCCESS;
+
+	WARN(!p_fs->dev_ejected,
+		"[EXFAT] No bh, device seems wrong or to be ejected.\n");
+
+	return FFS_MEDIAERR;
+}
+
+s32 bdev_write(struct super_block *sb, u32 secno, struct buffer_head *bh, u32 num_secs, s32 sync)
+{
+	s32 count;
+	struct buffer_head *bh2;
+	BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info);
+	FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+	struct exfat_sb_info *sbi = EXFAT_SB(sb);
+	long flags = sbi->debug_flags;
+
+	if (flags & EXFAT_DEBUGFLAGS_ERROR_RW)
+		return FFS_MEDIAERR;
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+
+	if (!p_bd->opened)
+		return FFS_MEDIAERR;
+
+	if (secno == bh->b_blocknr) {
+		lock_buffer(bh);
+		set_buffer_uptodate(bh);
+		mark_buffer_dirty(bh);
+		unlock_buffer(bh);
+		if (sync && (sync_dirty_buffer(bh) != 0))
+			return FFS_MEDIAERR;
+	} else {
+		count = num_secs << p_bd->sector_size_bits;
+
+		bh2 = __getblk(sb->s_bdev, secno, count);
+
+		if (bh2 == NULL)
+			goto no_bh;
+
+		lock_buffer(bh2);
+		memcpy(bh2->b_data, bh->b_data, count);
+		set_buffer_uptodate(bh2);
+		mark_buffer_dirty(bh2);
+		unlock_buffer(bh2);
+		if (sync && (sync_dirty_buffer(bh2) != 0)) {
+			__brelse(bh2);
+			goto no_bh;
+		}
+		__brelse(bh2);
+	}
+
+	return FFS_SUCCESS;
+
+no_bh:
+	WARN(!p_fs->dev_ejected,
+		"[EXFAT] No bh, device seems wrong or to be ejected.\n");
+
+	return FFS_MEDIAERR;
+}
+
+s32 bdev_sync(struct super_block *sb)
+{
+	BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info);
+#ifdef CONFIG_EXFAT_KERNEL_DEBUG
+	struct exfat_sb_info *sbi = EXFAT_SB(sb);
+	long flags = sbi->debug_flags;
+
+	if (flags & EXFAT_DEBUGFLAGS_ERROR_RW)
+		return FFS_MEDIAERR;
+#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
+
+	if (!p_bd->opened)
+		return FFS_MEDIAERR;
+
+	return sync_blockdev(sb->s_bdev);
+}