inode_ops_t Struct Reference

Inode operations structure. More...

#include <inode.h>

Collaboration diagram for inode_ops_t:

Data Fields
uint64_t(*	lookup )(inode_t *dir, dentry_t *target)
	Look up a dentry in a directory inode.
uint64_t(*	create )(inode_t *dir, dentry_t *target, mode_t mode)
	Handles both directories and files depending on mode.
void(*	truncate )(inode_t *target)
	Set the inode size to zero.
uint64_t(*	link )(inode_t *dir, dentry_t *old, dentry_t *new)
	Make the same file inode appear twice in the filesystem.
uint64_t(*	remove )(inode_t *dir, dentry_t *target, mode_t mode)
	Remove a file or directory.
void(*	cleanup )(inode_t *inode)
	Cleanup function called when the inode is being freed.

Detailed Description

Inode operations structure.

Note that the inodes mutex will be acquired by the vfs.

Definition at line 81 of file inode.h.

Field Documentation

lookup

uint64_t(* inode_ops_t::lookup) (inode_t *dir, dentry_t *target)

Look up a dentry in a directory inode.

Should set the target dentry to be positive (give it an inode), if the entry does not exist the operation should still return success but leave the dentry negative.

Parameters

dir	The directory inode to look in.
target	The dentry to look up.

Returns

On success, 0. On failure, returns ERR and errno is set.

Definition at line 93 of file inode.h.

create

uint64_t(* inode_ops_t::create) (inode_t *dir, dentry_t *target, mode_t mode)

Handles both directories and files depending on mode.

Takes in a negative dentry and creates the corresponding inode to make the dentry positive.

Parameters

dir	The directory inode to create the entry in.
target	The negative dentry to create.
mode	The mode to create the entry with.

Returns

On success, 0. On failure, returns ERR and errno is set.

Definition at line 104 of file inode.h.

truncate

void(* inode_ops_t::truncate) (inode_t *target)

Set the inode size to zero.

Parameters

target

The inode to truncate.

Definition at line 110 of file inode.h.

link

uint64_t(* inode_ops_t::link) (inode_t *dir, dentry_t *old, dentry_t *new)

Make the same file inode appear twice in the filesystem.

Parameters

dir	The directory inode to create the link in.
old	The existing dentry containing the inode to link to.
new	The negative dentry to store the same inode as old.

Returns

On success, 0. On failure, returns ERR and errno is set.

Definition at line 119 of file inode.h.

remove

uint64_t(* inode_ops_t::remove) (inode_t *dir, dentry_t *target, mode_t mode)

Remove a file or directory.

Parameters

dir	The directory inode containing the target.
target	The dentry to remove.
mode	The mode for removal.

Returns

On success, 0. On failure, returns ERR and errno is set.

Definition at line 128 of file inode.h.

cleanup

void(* inode_ops_t::cleanup) (inode_t *inode)

Cleanup function called when the inode is being freed.

Parameters

inode

The inode being freed.

Definition at line 134 of file inode.h.

---

The documentation for this struct was generated from the following file:

• include/kernel/fs/inode.h