Many fix attempts for the divide by zero exception

1 files changed, 149 insertions, 0 deletions

diff --git a/src/kernel/fs/vfs.h b/src/kernel/fs/vfs.h
new file mode 100644
index 0000000..b31767e
--- /dev/null
+++ b/src/kernel/fs/vfs.h
@@ -0,0 +1,149 @@
+#ifndef MELVIX_VFS_H
+#define MELVIX_VFS_H
+
+#include <stdint.h>
+
+#define PATH_SEPARATOR '/'
+#define PATH_SEPARATOR_STRING "/"
+#define PATH_UP ".."
+#define PATH_DOT "."
+#define VFS_EXT2_MAGIC 0xeeee2222
+
+#define O_RDONLY 0x0000
+#define O_WRONLY 0x0001
+#define O_RDWR 0x0002
+#define O_APPEND 0x0008
+#define O_CREAT 0x0200
+#define O_TRUNC 0x0400
+#define O_EXCL 0x0800
+#define O_NOFOLLOW 0x1000
+#define O_PATH 0x2000
+
+#define FS_FILE 0x01
+#define FS_DIRECTORY 0x02
+#define FS_CHARDEVICE 0x04
+#define FS_BLOCKDEVICE 0x08
+#define FS_PIPE 0x10
+#define FS_SYMLINK 0x20
+#define FS_MOUNTPOINT 0x40
+
+#define _IFMT 0170000 /* type of file */
+#define _IFDIR 0040000 /* directory */
+#define _IFCHR 0020000 /* character special */
+#define _IFBLK 0060000 /* block special */
+#define _IFREG 0100000 /* regular */
+#define _IFLNK 0120000 /* symbolic link */
+#define _IFSOCK 0140000 /* socket */
+#define _IFIFO 0010000 /* fifo */
+
+struct vfs_node;
+
+typedef uint32_t (*get_file_size_callback)(struct vfs_node *node);
+typedef uint32_t (*read_callback)(struct vfs_node *, uint32_t, uint32_t, char *);
+typedef uint32_t (*write_callback)(struct vfs_node *, uint32_t, uint32_t, char *);
+typedef void (*open_callback)(struct vfs_node *, uint32_t flags);
+typedef void (*close_callback)(struct vfs_node *);
+typedef struct dirent *(*readdir_callback)(struct vfs_node *, uint32_t);
+typedef struct vfs_node *(*finddir_callback)(struct vfs_node *, char *name);
+typedef void (*create_callback)(struct vfs_node *, char *name, uint16_t permission);
+typedef void (*unlink_callback)(struct vfs_node *, char *name);
+typedef void (*mkdir_callback)(struct vfs_node *, char *name, uint16_t permission);
+typedef int (*ioctl_callback)(struct vfs_node *, int request, void *argp);
+typedef int (*get_size_callback)(struct vfs_node *);
+typedef void (*chmod_callback)(struct vfs_node *, uint32_t mode);
+typedef char **(*listdir_callback)(struct vfs_node *);
+
+typedef struct vfs_node {
+	char name[256];
+	void *device;
+	uint32_t mask;
+	uint32_t uid;
+	uint32_t gid;
+	uint32_t flags;
+	uint32_t inode_num;
+	uint32_t size;
+	uint32_t fs_type;
+	uint32_t open_flags;
+	uint32_t create_time;
+	uint32_t access_time;
+	uint32_t modified_time;
+
+	uint32_t offset;
+	unsigned nlink;
+	int refcount;
+
+	// File operations
+	read_callback read;
+	write_callback write;
+	open_callback open;
+	close_callback close;
+	readdir_callback readdir;
+	finddir_callback finddir;
+	create_callback create;
+	unlink_callback unlink;
+	mkdir_callback mkdir;
+	ioctl_callback ioctl;
+	get_size_callback get_size;
+	chmod_callback chmod;
+	get_file_size_callback get_file_size;
+
+	listdir_callback listdir;
+} vfs_node_t;
+
+struct dirent {
+	char name[256];
+	uint32_t inode_num;
+};
+
+typedef struct vfs_entry {
+	char *name;
+	vfs_node_t *file;
+} vfs_entry_t;
+
+uint32_t vfs_get_file_size(vfs_node_t *node);
+
+uint32_t vfs_read(vfs_node_t *node, uint32_t offset, uint32_t size, char *buffer);
+
+uint32_t vfs_write(vfs_node_t *node, uint32_t offset, uint32_t size, char *buffer);
+
+void vfs_open(struct vfs_node *node, uint32_t flags);
+
+void vfs_close(vfs_node_t *node);
+
+vfs_node_t *vfs_finddir(vfs_node_t *node, char *name);
+
+void vfs_mkdir(char *name, uint16_t permission);
+
+void vfs_mkfile(char *name, uint16_t permission);
+
+int vfs_create_file(char *name, uint16_t permission);
+
+vfs_node_t *file_open(const char *file_name, uint32_t flags);
+
+char *expand_path(char *input);
+
+int vfs_ioctl(vfs_node_t *node, int request, void *argp);
+
+void vfs_chmod(vfs_node_t *node, uint32_t mode);
+
+void vfs_unlink(char *name);
+
+int vfs_symlink(char *value, char *name);
+
+int vfs_readlink(vfs_node_t *node, char *buf, uint32_t size);
+
+void vfs_init();
+
+void vfs_mount(char *path, vfs_node_t *local_root);
+
+typedef vfs_node_t *(*vfs_mount_callback)(char *arg, char *mountpoint);
+
+void vfs_register(char *name, vfs_mount_callback callme);
+
+void vfs_mount_dev(char *mountpoint, vfs_node_t *node);
+
+void print_vfstree();
+
+void vfs_db_listdir(char *name);
+
+#endif
\ No newline at end of file