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Finished adding untested bare functionality vfs

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Finished adding untested shm syscalls.
Finished adding untested l4 send/recv helpers

Everything compiles. Now going to fix lots of bugs ;-)
This commit is contained in:
Bahadir Balban
2008-02-03 17:42:38 +00:00
parent 05e9028e90
commit cab2e8bdd3
51 changed files with 1661 additions and 227 deletions
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119
tasks/fs0/include/fs.h
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@@ -1,25 +1,41 @@
/*
* VFS definitions.
*
* Copyright (C) 2007 Bahadir Balban.
* Copyright (C) 2007, 2008 Bahadir Balban.
*/
#ifndef __FS_H__
#define __FS_H__
#include <l4/lib/list.h>
typedef void (*dentry_op_t)(void);
typedef void (*superblock_op_t)(void);
#include <l4/lib/list.h>
#include <l4/macros.h>
#include <l4lib/types.h>
#include <stat.h>
typedef void (*vnode_op_t)(void);
typedef void (*file_op_t)(void);
struct dentry;
struct file;
struct file_system_type;
struct superblock;
struct vnode;
struct dentry_ops {
dentry_op_t compare;
int (*compare)(struct dentry *d, char *n);
};
/* Operations that work on file content */
struct file_ops {
/* Read a vnode's contents by page range */
int (*read)(struct vnode *v, unsigned long pfn,
unsigned long npages, void *buf);
/* Write a vnode's contents by page range */
int (*write)(struct vnode *v, unsigned long pfn,
unsigned long npages, void *buf);
file_op_t open;
file_op_t read;
file_op_t write;
file_op_t close;
file_op_t mmap;
file_op_t lseek;
@@ -27,9 +43,11 @@ struct file_ops {
file_op_t fsync;
};
/* Operations that work on vnode fields and associations between vnodes */
struct vnode_ops {
vnode_op_t create;
vnode_op_t lookup;
struct vnode *(*lookup)(struct vnode *root, char *path);
void * (*readdir)(struct vnode *v, void *dirbuf);
vnode_op_t link;
vnode_op_t unlink;
vnode_op_t mkdir;
@@ -40,22 +58,28 @@ struct vnode_ops {
};
struct superblock_ops {
superblock_op_t read_sb;
superblock_op_t write_sb;
superblock_op_t read_vnode;
superblock_op_t write_vnode;
int (*write_sb)(struct superblock *sb);
/*
* Given a vnum, reads the disk-inode and copies its data
* into the vnode's generic fields
*/
int (*read_vnode)(struct superblock *sb, struct vnode *v);
/* Writes vnode's generic fields into the disk-inode structure */
int (*write_vnode)(struct superblock *sb, struct vnode *v);
/* Allocates a disk-inode along with a vnode, and associates the two */
struct vnode *(*alloc_vnode)(struct superblock *sb);
/* Frees the vnode and the corresponding on-disk inode */
int (*free_vnode)(struct superblock *sb, struct vnode *v);
};
struct dentry;
struct file;
struct file_system_type;
struct superblock;
struct vnode;
#define VFS_DENTRY_NAME_MAX 512
#define VFS_DNAME_MAX 256
struct dentry {
int refcnt;
char name[VFS_DENTRY_NAME_MAX];
char name[VFS_DNAME_MAX];
struct dentry *parent; /* Parent dentry */
struct list_head child; /* List of dentries with same parent */
struct list_head children; /* List of children dentries */
@@ -64,35 +88,54 @@ struct dentry {
struct dentry_ops ops;
};
struct file {
int refcnt;
struct dentry *dentry;
struct file_ops ops;
};
struct vnode {
unsigned long id; /* Filesystem-wide unique vnode id */
unsigned long vnum; /* Filesystem-wide unique vnode id */
int refcnt; /* Reference counter */
int hardlinks; /* Number of hard links */
struct superblock *sb; /* Reference to superblock */
struct vnode_ops ops; /* Operations on this vnode */
struct list_head dirents; /* Dirents that refer to this 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 */
unsigned long size; /* Total size of vnode in bytes */
u32 type; /* Vnode type, dev? socket? dir? ... */
u32 mode; /* Permissions */
u32 owner; /* Owner */
u64 atime; /* Last access time */
u64 mtime; /* Last content modification */
u64 ctime; /* Last vnode modification */
u64 size; /* Size of contents */
void *inode; /* Ptr to fs-specific inode */
};
struct file_system_type {
char name[256];
unsigned long magic;
unsigned int flags;
struct superblock *(*get_sb)(void);
struct list_head sb_list;
/* FS0 vfs specific macros */
#define vfs_isdir(v) S_ISDIR((v)->type)
struct fstype_ops {
struct superblock *(*get_superblock)(void *buf);
};
#define VFS_FSNAME_MAX 256
struct file_system_type {
char name[VFS_FSNAME_MAX];
unsigned long magic;
struct fstype_ops ops;
struct list_head list; /* Member of list of all fs types */
struct list_head sblist; /* List of superblocks with this type */
};
struct superblock *get_superblock(void *buf);
struct superblock {
struct file_system_type fs;
struct superblock_ops ops;
struct dentry *root_dirent;
u64 fssize;
unsigned int blocksize;
struct list_head list;
struct file_system_type *fs;
struct superblock_ops *ops;
struct vnode *root;
void *fs_super;
};
void vfs_mount_fs(struct superblock *sb);
extern struct dentry_ops generic_dentry_operations;
#endif /* __FS_H__ */