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generated by cgit v1.2.2 (git 2.25.0) at 2025-10-07 19:13:48 -0400
tle='author Linus Torvalds <torvalds@ppc970.osdl.org> 2005-04-16 18:20:36 -0400 committer Linus Torvalds <torvalds@ppc970.osdl.org> 2005-04-16 18:20:36 -0400 Linux-2.6.12-rc2' href='/cgit/cgit.cgi/litmus-rt-ext-res.git/commit/fs/efs/dir.c?id=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2'>1da177e4c3f4 
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/*
 * dir.c
 *
 * Copyright (c) 1999 Al Smith
 */

#include <linux/buffer_head.h>
#include "efs.h"

static int efs_readdir(struct file *, struct dir_context *);

const struct file_operations efs_dir_operations = {
	.llseek		= generic_file_llseek,
	.read		= generic_read_dir,
	.iterate	= efs_readdir,
};

const struct inode_operations efs_dir_inode_operations = {
	.lookup		= efs_lookup,
};

static int efs_readdir(struct file *file, struct dir_context *ctx)
{
	struct inode *inode = file_inode(file);
	efs_block_t		block;
	int			slot;

	if (inode->i_size & (EFS_DIRBSIZE-1))
		printk(KERN_WARNING "EFS: WARNING: readdir(): directory size not a multiple of EFS_DIRBSIZE\n");

	/* work out where this entry can be found */
	block = ctx->pos >> EFS_DIRBSIZE_BITS;

	/* each block contains at most 256 slots */
	slot  = ctx->pos & 0xff;

	/* look at all blocks */
	while (block < inode->i_blocks) {
		struct efs_dir		*dirblock;
		struct buffer_head *bh;

		/* read the dir block */
		bh = sb_bread(inode->i_sb, efs_bmap(inode, block));

		if (!bh) {
			printk(KERN_ERR "EFS: readdir(): failed to read dir block %d\n", block);
			break;
		}