/*
 * 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;
}
'switch'/></form></td></tr>
<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
<table class='tabs'><tr><td>
<a href='/cgit.cgi/linux/net-next.git/'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?id=52b679f60e2a68af88411f12318675a2424a0e14'>refs</a><a class='active' href='/cgit.cgi/linux/net-next.git/log/include/dt-bindings/pinctrl/stm32f746-pinfunc.h'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/include/dt-bindings/pinctrl/stm32f746-pinfunc.h?id=52b679f60e2a68af88411f12318675a2424a0e14'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/pinctrl/stm32f746-pinfunc.h?id=52b679f60e2a68af88411f12318675a2424a0e14'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/pinctrl/stm32f746-pinfunc.h?id=52b679f60e2a68af88411f12318675a2424a0e14'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/dt-bindings/pinctrl/stm32f746-pinfunc.h'>
<input type='hidden' name='id' value='52b679f60e2a68af88411f12318675a2424a0e14'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?id=52b679f60e2a68af88411f12318675a2424a0e14'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/include?id=52b679f60e2a68af88411f12318675a2424a0e14'>include</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/dt-bindings?id=52b679f60e2a68af88411f12318675a2424a0e14'>dt-bindings</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/dt-bindings/pinctrl?id=52b679f60e2a68af88411f12318675a2424a0e14'>pinctrl</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/dt-bindings/pinctrl/stm32f746-pinfunc.h?id=52b679f60e2a68af88411f12318675a2424a0e14'>stm32f746-pinfunc.h</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/include/dt-bindings/pinctrl/stm32f746-pinfunc.h?id=52b679f60e2a68af88411f12318675a2424a0e14&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>