Release 4.18 fs/befs/io.c

// SPDX-License-Identifier: GPL-2.0
/*
 * linux/fs/befs/io.c
 *
 * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com
 *
 * Based on portions of file.c and inode.c
 * by Makoto Kato (m_kato@ga2.so-net.ne.jp)
 *
 * Many thanks to Dominic Giampaolo, author of Practical File System
 * Design with the Be File System, for such a helpful book.
 *
 */

#include <linux/buffer_head.h>

#include "befs.h"
#include "io.h"

/*
 * Converts befs notion of disk addr to a disk offset and uses
 * linux kernel function sb_bread() to get the buffer containing
 * the offset.
 */


struct buffer_head *

befs_bread_iaddr(struct super_block *sb, befs_inode_addr iaddr)
{
	struct buffer_head *bh;
	befs_blocknr_t block;
	struct befs_sb_info *befs_sb = BEFS_SB(sb);

	befs_debug(sb, "---> Enter %s "
		   "[%u, %hu, %hu]", __func__, iaddr.allocation_group,
		   iaddr.start, iaddr.len);

	if (iaddr.allocation_group > befs_sb->num_ags) {
		befs_error(sb, "BEFS: Invalid allocation group %u, max is %u",
			   iaddr.allocation_group, befs_sb->num_ags);
		goto error;
	}

	block = iaddr2blockno(sb, &iaddr);

	befs_debug(sb, "%s: offset = %lu", __func__, (unsigned long)block);

	bh = sb_bread(sb, block);

	if (bh == NULL) {
		befs_error(sb, "Failed to read block %lu",
			   (unsigned long)block);
		goto error;
	}

	befs_debug(sb, "<--- %s", __func__);
	return bh;

error:
	befs_debug(sb, "<--- %s ERROR", __func__);
	return NULL;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
147
86.98%
1
25.00%
Fabian Frederick
21
12.43%
2
50.00%
Andrew Morton
1
0.59%
1
25.00%
Total
169
100.00%
4
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Alan Cox
156
86.19%
1
14.29%
Fabian Frederick
21
11.60%
2
28.57%
Luis de Bethencourt
2
1.10%
2
28.57%
Andrew Morton
1
0.55%
1
14.29%
Greg Kroah-Hartman
1
0.55%
1
14.29%
Total
181
100.00%
7
100.00%
Directory: fs/befs

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