4
* Copyright (C) 2001 Will Dyson <will_dyson@pobox.com
6
* Based on portions of file.c and inode.c
7
* by Makoto Kato (m_kato@ga2.so-net.ne.jp)
9
* Many thanks to Dominic Giampaolo, author of Practical File System
10
* Design with the Be File System, for such a helpful book.
14
#include <linux/buffer_head.h>
20
* Converts befs notion of disk addr to a disk offset and uses
21
* linux kernel function sb_bread() to get the buffer containing
22
* the offset. -Will Dyson
27
befs_bread_iaddr(struct super_block *sb, befs_inode_addr iaddr)
29
struct buffer_head *bh = NULL;
30
befs_blocknr_t block = 0;
31
befs_sb_info *befs_sb = BEFS_SB(sb);
33
befs_debug(sb, "---> Enter befs_read_iaddr() "
35
iaddr.allocation_group, iaddr.start, iaddr.len);
37
if (iaddr.allocation_group > befs_sb->num_ags) {
38
befs_error(sb, "BEFS: Invalid allocation group %u, max is %u",
39
iaddr.allocation_group, befs_sb->num_ags);
43
block = iaddr2blockno(sb, &iaddr);
45
befs_debug(sb, "befs_read_iaddr: offset = %lu", block);
47
bh = sb_bread(sb, block);
50
befs_error(sb, "Failed to read block %lu", block);
54
befs_debug(sb, "<--- befs_read_iaddr()");
58
befs_debug(sb, "<--- befs_read_iaddr() ERROR");
63
befs_bread(struct super_block *sb, befs_blocknr_t block)
65
struct buffer_head *bh = NULL;
67
befs_debug(sb, "---> Enter befs_read() %Lu", block);
69
bh = sb_bread(sb, block);
72
befs_error(sb, "Failed to read block %lu", block);
76
befs_debug(sb, "<--- befs_read()");
81
befs_debug(sb, "<--- befs_read() ERROR");