Change project structure

2020-02-04 12:45:15 +02:00
parent b60ae9eebd
commit d9595c7f62
380 changed files with 434 additions and 411 deletions
@@ -0,0 +1,98 @@
+/** vim: ft=c.doxygen
+ * @file node.h
+ * @brief vnode
+ */
+#pragma once
+#include <stdint.h>
+#include "user/dirent.h"
+#include "user/stat.h"
+#include "sys/types.h"
+
+#define NODE_MAXLEN 64
+
+// Means the node has no physical storage and resides only
+// in memory
+#define VN_MEMORY       (1 << 0)
+
+struct ofile;
+struct vfs_ioctx;
+struct vnode;
+struct fs;
+
+enum vnode_type {
+    VN_REG,
+    VN_DIR,
+    VN_BLK,
+    VN_CHR,
+    VN_LNK,
+    VN_UNK,
+    VN_MNT,
+};
+
+struct vnode_operations {
+    int (*find) (struct vnode *at, const char *name, struct vnode **node);
+
+    ssize_t (*readdir) (struct ofile *fd, struct dirent *ent);
+    int (*opendir) (struct ofile *fd);
+    int (*open) (struct ofile *fd, int opt);
+    void (*close) (struct ofile *fd);
+    int (*creat) (struct vnode *at, const char *filename, uid_t uid, gid_t gid, mode_t mode);
+    int (*mkdir) (struct vnode *at, const char *filename, uid_t uid, gid_t gid, mode_t mode);
+    int (*truncate) (struct vnode *at, size_t size);
+    int (*unlink) (struct vnode *vn);
+
+    off_t (*lseek) (struct ofile *fd, off_t offset, int whence);
+
+    int (*stat) (struct vnode *at, struct stat *st);
+    int (*chmod) (struct vnode *node, mode_t mode);
+    int (*chown) (struct vnode *node, uid_t uid, gid_t gid);
+
+    int (*readlink) (struct vnode *at, char *buf, size_t lim);
+
+    ssize_t (*read) (struct ofile *fd, void *buf, size_t count);
+    ssize_t (*write) (struct ofile *fd, const void *buf, size_t count);
+};
+
+struct vnode {
+    enum vnode_type type;
+
+    char name[NODE_MAXLEN];
+    uint32_t flags;
+
+    struct vnode *first_child;
+    struct vnode *next_child;
+    struct vnode *parent;
+
+    // For filesystem roots, mountpoint directory vnode
+    // For symlinks, this is target vnode
+    // For mountpoints, this is filesystem root
+    struct vnode *target;
+
+    uint32_t open_count;
+    uint64_t ino;
+
+    gid_t gid;
+    uid_t uid;
+    mode_t mode;
+
+    struct fs *fs;
+    void *fs_data;
+    /*
+     * (struct blkdev *) if type == VN_BLK
+     * (struct chrdev *) if type == VN_CHR
+     */
+    void *dev;
+
+    struct vnode_operations *op;
+};
+
+// Node itself
+struct vnode *vnode_create(enum vnode_type t, const char *name);
+
+// Tree manipulation
+void vnode_attach(struct vnode *parent, struct vnode *child);
+void vnode_detach(struct vnode *node);
+
+// Tree traversal
+void vnode_dump_tree(int level, struct vnode *node, int depth);
+int vnode_lookup_child(struct vnode *of, const char *name, struct vnode **child);