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b725d09eff
new file: tasks/fs0/include/memfs/file.h new file: tasks/fs0/include/stat.h new file: tasks/fs0/include/vfs.h
89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
#ifndef __VFS_H__
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#define __VFS_H__
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#include <fs.h>
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#include <lib/malloc.h>
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#include <l4/lib/list.h>
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#include <memfs/memfs.h>
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/*
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* FIXME:
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* These ought to be strings and split/comparison functions should
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* always use strings because formats like UTF-8 wouldn't work.
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*/
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#define VFS_STR_SEP '/'
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#define VFS_STR_PARDIR ".."
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#define VFS_STR_CURDIR "."
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#define VFS_STR_XATDIR "...."
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/*
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* This is a temporary replacement for page cache support provided by mm0.
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* Normally mm0 tracks all vnode pages, but this is used to track pages in
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* directory vnodes, which are normally never mapped by tasks.
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*/
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extern struct memfs_superblock *memfs_superblock;
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static inline void *vfs_alloc_dirpage(void)
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{
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/*
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* Urgh, we allocate from the block cache of memfs to store generic vfs directory
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* pages. This is currently the quickest we can allocate page-aligned memory.
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*/
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return memfs_alloc_block(memfs_superblock);
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}
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static inline void vfs_free_dirpage(void *block)
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{
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memfs_free_block(memfs_superblock, block);
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}
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static inline struct dentry *vfs_alloc_dentry(void)
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{
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struct dentry *d = kzalloc(sizeof(struct dentry));
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INIT_LIST_HEAD(&d->child);
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INIT_LIST_HEAD(&d->children);
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INIT_LIST_HEAD(&d->vref);
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return d;
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}
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static inline void vfs_free_dentry(struct dentry *d)
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{
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return kfree(d);
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}
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static inline struct vnode *vfs_alloc_vnode(void)
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{
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struct vnode *v = kzalloc(sizeof(struct vnode));
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INIT_LIST_HEAD(&v->dentries);
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INIT_LIST_HEAD(&v->state_list);
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return v;
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}
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static inline void vfs_free_vnode(struct vnode *v)
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{
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kfree(v);
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}
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static inline struct superblock *vfs_alloc_superblock(void)
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{
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struct superblock *sb = kmalloc(sizeof(struct superblock));
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INIT_LIST_HEAD(&sb->list);
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return sb;
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}
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struct vfs_mountpoint {
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struct superblock *sb; /* The superblock of mounted filesystem */
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struct vnode *pivot; /* The dentry upon which we mount */
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};
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extern struct vfs_mountpoint vfs_root;
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int vfs_mount_root(struct superblock *sb);
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struct vnode *generic_vnode_lookup(struct vnode *thisnode, char *path);
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struct vnode *vfs_lookup(struct superblock *sb, char *path);
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#endif /* __VFS_H__ */
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