mirror of
https://github.com/drasko/codezero.git
synced 2026-01-12 10:53:16 +01:00
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
#ifndef __VFS_H__
|
|
#define __VFS_H__
|
|
|
|
#include <fs.h>
|
|
#include <lib/malloc.h>
|
|
#include <l4/lib/list.h>
|
|
#include <memfs/memfs.h>
|
|
#include <l4/macros.h>
|
|
#include <stdio.h>
|
|
#include <task.h>
|
|
#include <path.h>
|
|
|
|
extern struct link vnode_cache;
|
|
extern struct link dentry_cache;
|
|
|
|
/*
|
|
* This is a temporary origacement for page cache support provided by mm0.
|
|
* Normally mm0 tracks all vnode pages, but this is used to track pages in
|
|
* directory vnodes, which are normally never mapped by tasks.
|
|
*/
|
|
static inline void *vfs_alloc_dirpage(struct vnode *v)
|
|
{
|
|
/*
|
|
* Urgh, we allocate from the block cache of memfs to store generic vfs directory
|
|
* pages. This is currently the quickest we can allocate page-aligned memory.
|
|
*/
|
|
return memfs_alloc_block(v->sb->fs_super);
|
|
}
|
|
|
|
static inline void vfs_free_dirpage(struct vnode *v, void *block)
|
|
{
|
|
memfs_free_block(v->sb->fs_super, block);
|
|
}
|
|
|
|
static inline struct dentry *vfs_alloc_dentry(void)
|
|
{
|
|
struct dentry *d = kzalloc(sizeof(struct dentry));
|
|
|
|
link_init(&d->child);
|
|
link_init(&d->children);
|
|
link_init(&d->vref);
|
|
link_init(&d->cache_list);
|
|
|
|
return d;
|
|
}
|
|
|
|
static inline void vfs_free_dentry(struct dentry *d)
|
|
{
|
|
return kfree(d);
|
|
}
|
|
|
|
static inline struct vnode *vfs_alloc_vnode(void)
|
|
{
|
|
struct vnode *v = kzalloc(sizeof(struct vnode));
|
|
|
|
link_init(&v->dentries);
|
|
link_init(&v->cache_list);
|
|
|
|
return v;
|
|
}
|
|
|
|
static inline void vfs_free_vnode(struct vnode *v)
|
|
{
|
|
BUG(); /* Are the dentries freed ??? */
|
|
list_remove(&v->cache_list);
|
|
kfree(v);
|
|
}
|
|
|
|
static inline struct superblock *vfs_alloc_superblock(void)
|
|
{
|
|
struct superblock *sb = kmalloc(sizeof(struct superblock));
|
|
link_init(&sb->list);
|
|
|
|
return sb;
|
|
}
|
|
|
|
struct vfs_mountpoint {
|
|
struct superblock *sb; /* The superblock of mounted filesystem */
|
|
struct vnode *pivot; /* The dentry upon which we mount */
|
|
};
|
|
|
|
extern struct vfs_mountpoint vfs_root;
|
|
|
|
int vfs_mount_root(struct superblock *sb);
|
|
struct vnode *generic_vnode_lookup(struct vnode *thisnode, struct pathdata *p,
|
|
const char *component);
|
|
struct vnode *vfs_lookup_bypath(struct pathdata *p);
|
|
struct vnode *vfs_lookup_byvnum(struct superblock *sb, unsigned long vnum);
|
|
|
|
#endif /* __VFS_H__ */
|