Mark
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/** vim: ft=c.doxygen
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* @file node.h
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* @brief vnode
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*/
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#pragma once
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#include <stdint.h>
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#include "sys/types.h"
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#include "dirent.h"
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#include "sys/stat.h"
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struct ofile;
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struct vfs_ioctx;
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typedef struct vnode vnode_t;
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typedef struct fs fs_t;
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enum vnode_type {
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VN_REG,
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VN_DIR,
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VN_BLK,
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VN_CHR,
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VN_LNK
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};
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/**
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* @brief Set of functions implemented by filesystem driver
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*/
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struct vnode_operations {
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// File tree traversal, node instance operations
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int (*find) (vnode_t *node, const char *path, vnode_t **res);
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void (*destroy) (vnode_t *node);
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// Symlink
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int (*readlink) (vnode_t *node, char *path);
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int (*symlink) (vnode_t *at, struct vfs_ioctx *ctx, const char *name, const char *dst);
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// File entry operations
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int (*access) (vnode_t *node, uid_t *uid, gid_t *gid, mode_t *mode);
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int (*creat) (vnode_t *node, struct vfs_ioctx *ctx, const char *name, mode_t mode, int opt, vnode_t **res);
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int (*mkdir) (vnode_t *at, const char *name, mode_t mode);
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int (*unlink) (vnode_t *at, vnode_t *vn, const char *name);
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int (*stat) (vnode_t *node, struct stat *st);
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int (*chmod) (vnode_t *node, mode_t mode);
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int (*chown) (vnode_t *node, uid_t uid, gid_t gid);
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// Directory access
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int (*opendir) (vnode_t *node, int opt);
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int (*readdir) (struct ofile *fd);
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// File access
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int (*open) (vnode_t *node, int opt);
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void (*close) (struct ofile *fd);
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ssize_t (*read) (struct ofile *fd, void *buf, size_t count);
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ssize_t (*write) (struct ofile *fd, const void *buf, size_t count);
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int (*truncate) (struct ofile *fd, size_t length);
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};
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struct vnode {
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enum vnode_type type;
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uint32_t refcount;
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fs_t *fs;
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// Private filesystem-specific data (like inode struct)
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void *fs_data;
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// Private filesystem-specific number (like inode number)
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uint32_t fs_number;
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/*
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* (struct blkdev *) if type == VN_BLK
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* (struct chrdev *) if type == VN_CHR
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*/
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void *dev;
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void *tree_node;
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struct vnode_operations *op;
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};
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void vnode_ref(vnode_t *vn);
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void vnode_unref(vnode_t *vn);
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void vnode_free(vnode_t *vn);
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