minix.c File Reference

minix: loading and mounting the filesystem, and the vnodes of its inodes. More...

#include <core/system.h>
#include <core/module.h>
#include <fs/vfs.h>
#include <fs/posix.h>
#include <fs/vcache.h>
#include <fs/bcache.h>
#include <aquila/errno.h>
#include <ds/bitmap.h>
#include <minix.h>

Go to the source code of this file.

Functions
int	minix_inode_build (struct minix *desc, ino_t ino, struct vnode **ref)
	Gets the vnode of an inode: the cached one if it's in use, or a new one made from the inode on the disk.
int	minix_inode_sync (struct vnode *inode)
	Writes a vnode's attributes back to its inode on the disk.
static int	minix_init ()
	Installs the minix filesystem at boot.
static int	minix_load (struct vnode *dev, struct vnode **super)
	Loads a minix filesystem from a device: its superblock, its bitmaps, and its root directory's vnode in *super.
static int	minix_mount (struct vnode *dir, int flags, void *_args)
	Mounts the minix filesystem of a device (the dev argument) on a directory.

Variables
struct fs	minixfs

Detailed Description

minix: loading and mounting the filesystem, and the vnodes of its inodes.

The inode and zone bitmaps are kept in memory, and the vnodes in use in a cache by inode number. See minix.h for the disk's format.

Definition in file minix.c.

Function Documentation

minix_init()

int minix_init ( )

static

Installs the minix filesystem at boot.

Definition at line 110 of file minix.c.

References minix_init(), minixfs, and vfs_install().

Referenced by minix_init().

minix_inode_build()

int minix_inode_build	(	struct minix *	desc,
		ino_t	ino,
		struct vnode **	ref )

Gets the vnode of an inode: the cached one if it's in use, or a new one made from the inode on the disk.

Parameters

desc	the mounted filesystem
ino	the inode number
ref	if not NULL, set to the vnode

Returns

0, -ENOMEM, or an I/O error

Definition at line 30 of file minix.c.

References vnode::fs, minix_inode::gid, vnode::gid, vnode::ino, kfree(), kmalloc(), M_ZERO, minix_inode_build(), minix_inode_read(), minixfs, minix_inode::mode, vnode::mode, minix_inode::mtime, vnode::mtime, vnode::nlink, minix_inode::nlinks, NULL, vnode::p, vnode::rdev, minix_inode::size, vnode::size, timespec::tv_nsec, timespec::tv_sec, minix_inode::uid, vnode::uid, minix::vcache, vcache_find(), vcache_insert(), and minix_inode::zones.

Referenced by minix_inode_build(), minix_load(), minix_vget(), and minix_vmknod().

minix_inode_sync()

int minix_inode_sync

(

struct vnode *

inode

)

Writes a vnode's attributes back to its inode on the disk.

Parameters

inode

the vnode

Returns

0, or an I/O error

Definition at line 87 of file minix.c.

References minix_inode::gid, vnode::gid, vnode::ino, minix_inode_read(), minix_inode_sync(), minix_inode_write(), minix_inode::mode, vnode::mode, minix_inode::mtime, vnode::mtime, vnode::nlink, minix_inode::nlinks, vnode::p, minix_inode::size, vnode::size, timespec::tv_sec, minix_inode::uid, and vnode::uid.

Referenced by minix_inode_sync(), and minix_trunc().

minix_load()

int minix_load ( struct vnode * dev, struct vnode ** super )

static

Loads a minix filesystem from a device: its superblock, its bitmaps, and its root directory's vnode in *super.

Returns 0, -EINVAL if the device doesn't have a minix v1 filesystem with 1 KiB blocks, or a negative errno.

Definition at line 119 of file minix.c.

References minix::bcache, bcache_init(), minix_superblock::block_size, minix::bs, minix::dentry_size, minix_superblock::firstdatazone, bcache::hashmap, vcache::hashmap, minix::imap, minix_superblock::imap_blocks, minix::imap_off, minix::inode_size, minix::inode_table, kfree(), kmalloc(), M_ZERO, minix_superblock::magic, bitmap::map, bitmap::max_idx, minix_inode_build(), minix_load(), MINIX_MAGIC, MINIX_MAGIC2, minix::name_len, minix_superblock::ninodes, NULL, minix_superblock::nzones, minix::superblock, minix::supernode, minix::vcache, vcache_init(), vfs_read(), minix::zmap, minix_superblock::zmap_blocks, and minix::zmap_off.

Referenced by minix_load().

minix_mount()

int minix_mount ( struct vnode * dir, int flags, void * _args )

static

Mounts the minix filesystem of a device (the dev argument) on a directory.

Definition at line 236 of file minix.c.

References fs::load, minix_mount(), minixfs, NULL, vfs_bind(), and vfs_lookup().

Referenced by minix_mount().

Variable Documentation

minixfs

struct fs minixfs

Initial value:

        = {
    .name  = "minix",
    .init  = minix_init,
    .load  = minix_load,
    .mount = minix_mount,
 
    .vops = {
        .read    = minix_read,
        .write   = minix_write,
        .readdir = minix_readdir,
        .finddir = minix_finddir,
        .trunc   = minix_trunc,
        
        .vmknod  = minix_vmknod,
        .vget    = minix_vget,
    },
 
    .fops = {
        .open    = posix_file_open,
        .read    = posix_file_read,
        .write   = posix_file_write,
        .readdir = posix_file_readdir,
        .lseek   = posix_file_lseek,
        .trunc   = posix_file_trunc,
 
        .eof     = posix_file_eof,
    }
}

Definition at line 265 of file minix.c.

Referenced by minix_init(), minix_inode_build(), and minix_mount().