initramfs.c

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#include <core/system.h>
#include <core/string.h>
#include <core/panic.h>
#include <mm/mm.h>
 
#include <dev/ramdev.h>
#include <fs/vfs.h>
#include <fs/initramfs.h>
#include <fs/devfs.h>
#include <fs/posix.h>
#include <aquila/errno.h>
 
#include <ds/queue.h>
#include <boot/boot.h>
 
static struct vnode *rd_dev = NULL;
static struct queue *archivers = QUEUE_NEW();

int initramfs_archiver_register(struct fs *fs)
{
    if (!enqueue(archivers, fs))
        return -ENOMEM;
 
    printk("initramfs: registered archiver: %s\n", fs->name);
 
    return 0;
}

int load_ramdisk(module_t *module)
{
    printk("kernel: loading ramdisk\n");
 
    rd_dev = kmalloc(sizeof(struct vnode), &M_VNODE, M_ZERO);
    if (!rd_dev) return -ENOMEM;
 
    extern size_t rd_size;
 
    rd_dev->mode = S_IFBLK;
    rd_dev->rdev = DEV(1, 0);
    rd_dev->size = rd_size;
    rd_dev->fs   = &devfs;
 
    struct vnode *root = NULL;
    int err = -1;
 
    queue_for (node, archivers) {
        struct fs *fs = node->value;
 
        if (!(err = fs->load(rd_dev, &root)))
            break;
    }
 
    if (err) {
        printk("Error code = %d\n", err);
        panic("Could not load ramdisk\n");
    }
 
    return vfs_mount_root(root);
}