dentry.h

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#pragma once
 
#include <kernel/fs/path.h>
#include <kernel/sync/mutex.h>
#include <kernel/utils/map.h>
#include <kernel/utils/ref.h>
 
#include <stdatomic.h>
#include <stdint.h>
#include <sys/io.h>
#include <sys/list.h>
 
typedef struct dentry dentry_t;
typedef struct dentry_ops dentry_ops_t;
typedef struct inode inode_t;
typedef struct superblock superblock_t;
 
typedef uint64_t dentry_id_t;
 
#define DENTRY_IS_ROOT(dentry) (dentry->parent == dentry)
 
typedef enum
{
    DENTRY_NONE = 0, 
    DENTRY_NEGATIVE = 1 << 1,
} dentry_flags_t;
 
typedef struct dentry_ops
{
    uint64_t (*getdents)(dentry_t* dentry, dirent_t* buffer, uint64_t count, uint64_t* offset, path_flags_t flags);
    void (*cleanup)(dentry_t* entry); 
} dentry_ops_t;
 
typedef struct dentry
{
    ref_t ref;
    dentry_id_t id;
    char name[MAX_NAME];
    inode_t* inode;
    dentry_t* parent;
    list_entry_t siblingEntry;
    list_t children;
    mutex_t childrenMutex;
    superblock_t* superblock;
    const dentry_ops_t* ops;
    void* private;
    map_entry_t mapEntry;
    _Atomic(dentry_flags_t) flags;
    atomic_uint64_t mountCount;
} dentry_t;
 
dentry_t* dentry_new(superblock_t* superblock, dentry_t* parent, const char* name);
 
uint64_t dentry_make_positive(dentry_t* dentry, inode_t* inode);
 
void dentry_inc_mount_count(dentry_t* dentry);
 
void dentry_dec_mount_count(dentry_t* dentry);
 
uint64_t dentry_generic_getdents(dentry_t* dentry, dirent_t* buffer, uint64_t count, uint64_t* offset,
    path_flags_t flags);