dentry.c File Reference

minix: directory entries, a name and an inode number each, in the directory's blocks. More...

#include <core/panic.h>
#include <minix.h>

Go to the source code of this file.

Functions
uint32_t	minix_dentry_find (struct minix *desc, struct minix_inode *m_inode, const char *name)
	Finds the inode number of a name in a directory.
int	minix_dentry_create (struct vnode *dir, const char *name, ino_t ino, mode_t mode)
	Adds an entry to a directory, in its first free slot.

Detailed Description

minix: directory entries, a name and an inode number each, in the directory's blocks.

Definition in file dentry.c.

Function Documentation

minix_dentry_create()

int minix_dentry_create	(	struct vnode *	dir,
		const char *	name,
		ino_t	ino,
		mode_t	mode )

Adds an entry to a directory, in its first free slot.

The directory's size grows if the slot is past its end. A directory whose blocks are all full grows by a block, with the entry at its start.

Parameters

dir	the directory
name	the new entry's name (cut to the filesystem's longest)
ino	its inode number
mode	its type and permissions (not used)

Returns

0, -ENOTDIR if dir isn't a directory, -ENOSPC or -EFBIG if it can't grow, or an I/O error

Definition at line 68 of file dentry.c.

References minix::bs, minix::dentry_size, minix_dentry::ino, vnode::ino, memcpy(), memset(), MIN, minix_dentry_create(), minix_inode_block_read(), minix_inode_block_write(), minix_inode_read(), minix_inode_write(), vnode::mode, minix_dentry::name, minix::name_len, vnode::p, minix_inode::size, and vnode::size.

Referenced by minix_dentry_create(), and minix_vmknod().

minix_dentry_find()

uint32_t minix_dentry_find	(	struct minix *	desc,
		struct minix_inode *	m_inode,
		const char *	name )

Finds the inode number of a name in a directory.

The callers check that the inode is a directory: an inode that isn't one has no entries.

Parameters

desc	the mounted filesystem
m_inode	the directory's inode
name	the name

Returns

the inode number, or 0 if there's no such name (or the inode isn't a directory)

Definition at line 19 of file dentry.c.

References minix::bs, minix::dentry_size, minix_dentry::ino, memcpy(), minix_dentry_find(), minix_inode_block_read(), minix_inode::mode, minix_dentry::name, minix::name_len, and minix_inode::size.

Referenced by minix_dentry_find(), minix_finddir(), and minix_vmknod().