The vnode operations that work on a directory and a name, or on a vnode's inode: each checks its arguments, then calls the filesystem's operation (vops). More...

#include <core/system.h>
#include <fs/vfs.h>

Functions
int	vfs_vmknod (struct vnode dir, const char name, mode_t mode, dev_t dev, struct uio uio, struct vnode *ref)
	Makes a node in a directory.
int	vfs_vcreat (struct vnode dir, const char name, struct uio uio, struct vnode *ref)
	Makes a regular file in a directory, with no permissions set.
int	vfs_vmkdir (struct vnode dir, const char name, struct uio uio, struct vnode *ref)
	Makes a directory in a directory, with no permissions set.
int	vfs_vunlink (struct vnode dir, const char fn, struct uio *uio)
	Removes a name from a directory.
int	vfs_vlink (struct vnode dir, const char fn, struct vnode vnode, struct uio uio)
	Adds a name for an existing file (a hard link) to a directory of the same filesystem.
int	vfs_vrename (struct vnode odir, const char ofn, struct vnode ndir, const char nfn, struct uio *uio)
	Renames an entry, possibly to another directory of the same filesystem.
int	vfs_setattr (struct vnode *vnode)
	Has the filesystem store a vnode's attributes (mode, owner, times) after they were changed in memory.
int	vfs_vget (struct vnode super, ino_t ino, struct vnode *ref)
	Gets the vnode of an inode, by its number.
int	vfs_map (struct vm_space vm_space, struct vm_entry vm_entry)
	Maps a file into an address space, for mmap(): a device's own mapping, or the filesystem's.

Detailed Description

The vnode operations that work on a directory and a name, or on a vnode's inode: each checks its arguments, then calls the filesystem's operation (vops).

Definition in file vops.c.

Function Documentation

◆ vfs_map()

int vfs_map	(	struct vm_space *	vm_space,
		struct vm_entry *	vm_entry )

Maps a file into an address space, for mmap(): a device's own mapping, or the filesystem's.

Parameters

vm_space	the address space
vm_entry	the mapping, whose object is the file

Returns: 0, -EINVAL if the mapping isn't of a file, -ENOSYS, or the filesystem's error

Definition at line 205 of file vops.c.

References vnode::fs, ISDEV, kdev_map(), vops::map, vm_object::p, vm_object::type, vfs_map(), vm_entry::vm_object, VMOBJ_FILE, VNODE_DEV, and fs::vops.

Referenced by sys_mmap(), and vfs_map().

◆ vfs_setattr()

int vfs_setattr ( struct vnode * vnode )

Has the filesystem store a vnode's attributes (mode, owner, times) after they were changed in memory.

Parameters

vnode the vnode

Returns: 0, -ENOSYS if the filesystem can't, or its error

Definition at line 156 of file vops.c.

References vnode::fs, vops::setattr, vfs_setattr(), and fs::vops.

Referenced by store(), and vfs_setattr().

◆ vfs_vcreat()

int vfs_vcreat	(	struct vnode *	dir,
		const char *	name,
		struct uio *	uio,
		struct vnode **	ref )

Makes a regular file in a directory, with no permissions set.

Parameters

dir	the directory
name	the new file's name
uio	who is asking
ref	if not NULL, set to the new vnode (the caller closes it)

Returns: 0, or a negative errno

Definition at line 52 of file vops.c.

References vfs_vcreat(), and vfs_vmknod().

Referenced by vfs_vcreat().

◆ vfs_vget()

int vfs_vget	(	struct vnode *	super,
		ino_t	ino,
		struct vnode **	ref )

Gets the vnode of an inode, by its number.

On success it has a reference for the caller.

Parameters

super	any vnode of the filesystem (it names the filesystem)
ino	the inode number
ref	if not NULL, set to the vnode (the caller closes it)

Returns: 0, -ENOSYS if the filesystem can't, or its error

Definition at line 176 of file vops.c.

References vnode::fs, vnode::ino, NULL, vnode::ref, vfs_vget(), vops::vget, and fs::vops.

Referenced by entry_get(), lookup_name(), vfs_lookup_parent(), vfs_parent(), vfs_remove(), and vfs_vget().

◆ vfs_vlink()

int vfs_vlink	(	struct vnode *	dir,
		const char *	fn,
		struct vnode *	vnode,
		struct uio *	uio )

Adds a name for an existing file (a hard link) to a directory of the same filesystem.

Parameters

dir	the directory
fn	the new name
vnode	the file
uio	who is asking

Returns: 0, -EXDEV across filesystems, -ENOTDIR, -ENOSYS, or the filesystem's error

Definition at line 103 of file vops.c.

References vnode::fs, vnode::mode, vfs_vlink(), vops::vlink, and fs::vops.

Referenced by vfs_link(), and vfs_vlink().

◆ vfs_vmkdir()

int vfs_vmkdir	(	struct vnode *	dir,
		const char *	name,
		struct uio *	uio,
		struct vnode **	ref )

Makes a directory in a directory, with no permissions set.

Parameters

dir	the directory
name	the new directory's name
uio	who is asking
ref	if not NULL, set to the new vnode (the caller closes it)

Returns: 0, or a negative errno

Definition at line 66 of file vops.c.

References vfs_vmkdir(), and vfs_vmknod().

Referenced by vfs_vmkdir().

◆ vfs_vmknod()

int vfs_vmknod	(	struct vnode *	dir,
		const char *	name,
		mode_t	mode,
		dev_t	dev,
		struct uio *	uio,
		struct vnode **	ref )

Makes a node in a directory.

On success the new vnode has a reference for the caller.

Parameters

dir	the directory
name	the new node's name
mode	its type (S_IF*) and permissions
dev	its device number, for a device node
uio	who is asking
ref	if not NULL, set to the new vnode (the caller closes it)