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Some efforts to adding better support for readdir

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This commit is contained in:
Bahadir Balban
2008-02-14 12:08:21 +00:00
parent 60cce15a4d
commit 2440b5be61
8 changed files with 79 additions and 8 deletions
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3
tasks/fs0/include/fs.h
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@@ -47,7 +47,7 @@ struct file_ops {
struct vnode_ops {
vnode_op_t create;
struct vnode *(*lookup)(struct vnode *root, char *path);
void * (*readdir)(struct vnode *v, void *dirbuf);
void *(*readdir)(struct vnode *v, void *dirbuf);
vnode_op_t link;
vnode_op_t unlink;
vnode_op_t mkdir;
@@ -97,6 +97,7 @@ struct vnode {
struct file_ops fops; /* File-related operations on this vnode */
struct list_head dentries; /* Dirents that refer to this vnode */
struct list_head state_list; /* List for vnode's dirty/clean state */
struct list_head cache_list; /* For adding the vnode to vnode cache */
u32 type; /* Vnode type, dev? socket? dir? ... */
u32 mode; /* Permissions */
u32 owner; /* Owner */

5
tasks/fs0/include/memfs/memfs.h
View File

@@ -75,8 +75,9 @@ struct memfs_superblock {
#define MEMFS_DNAME_MAX 32
struct memfs_dentry {
u32 inum; /* Inode number */
u32 nlength; /* Name length */
u32 inum; /* Inode number */
u32 offset; /* Dentry offset in its buffer */
u32 rlength; /* Record length */
u8 name[MEMFS_DNAME_MAX]; /* Name string */
};

18
tasks/fs0/include/vfs.h
View File

@@ -6,6 +6,17 @@
#include <l4/lib/list.h>
#include <memfs/memfs.h>
/* Buffer to keep directory content. This is the only vnode content
* that fs0 maintains. All other file data is in mm0 page cache.
*/
struct dirbuf {
struct list_head list;
unsigned long bufsize;
u8 *buffer;
};
extern struct list_head vnode_cache;
extern struct list_head dentry_cache;
/*
* FIXME:
* These ought to be strings and split/comparison functions should
@@ -58,12 +69,16 @@ static inline struct vnode *vfs_alloc_vnode(void)
INIT_LIST_HEAD(&v->dentries);
INIT_LIST_HEAD(&v->state_list);
INIT_LIST_HEAD(&v->cache_list);
list_add(&v->cache_list, &vnode_cache);
return v;
}
static inline void vfs_free_vnode(struct vnode *v)
{
BUG(); /* Are the dentries freed ??? */
list_del(&v->cache_list);
kfree(v);
}
@@ -84,6 +99,7 @@ extern struct vfs_mountpoint vfs_root;
int vfs_mount_root(struct superblock *sb);
struct vnode *generic_vnode_lookup(struct vnode *thisnode, char *path);
struct vnode *vfs_lookup(struct superblock *sb, char *path);
struct vnode *vfs_lookup_bypath(struct superblock *sb, char *path);
struct vnode *vfs_lookup_byvnum(struct superblock *sb, unsigned long vnum);
#endif /* __VFS_H__ */