mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
69 lines
1.5 KiB
69 lines
1.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
#include <linux/slab.h> |
|
#include <linux/types.h> |
|
#include <linux/mm.h> |
|
#include <linux/fs.h> |
|
|
|
#include <xen/page.h> |
|
#include <xen/xenbus.h> |
|
|
|
#include "xenfs.h" |
|
|
|
static ssize_t xsd_read(struct file *file, char __user *buf, |
|
size_t size, loff_t *off) |
|
{ |
|
const char *str = (const char *)file->private_data; |
|
return simple_read_from_buffer(buf, size, off, str, strlen(str)); |
|
} |
|
|
|
static int xsd_release(struct inode *inode, struct file *file) |
|
{ |
|
kfree(file->private_data); |
|
return 0; |
|
} |
|
|
|
static int xsd_kva_open(struct inode *inode, struct file *file) |
|
{ |
|
file->private_data = (void *)kasprintf(GFP_KERNEL, "0x%p", |
|
xen_store_interface); |
|
if (!file->private_data) |
|
return -ENOMEM; |
|
return 0; |
|
} |
|
|
|
static int xsd_kva_mmap(struct file *file, struct vm_area_struct *vma) |
|
{ |
|
size_t size = vma->vm_end - vma->vm_start; |
|
|
|
if ((size > PAGE_SIZE) || (vma->vm_pgoff != 0)) |
|
return -EINVAL; |
|
|
|
if (remap_pfn_range(vma, vma->vm_start, |
|
virt_to_pfn(xen_store_interface), |
|
size, vma->vm_page_prot)) |
|
return -EAGAIN; |
|
|
|
return 0; |
|
} |
|
|
|
const struct file_operations xsd_kva_file_ops = { |
|
.open = xsd_kva_open, |
|
.mmap = xsd_kva_mmap, |
|
.read = xsd_read, |
|
.release = xsd_release, |
|
}; |
|
|
|
static int xsd_port_open(struct inode *inode, struct file *file) |
|
{ |
|
file->private_data = (void *)kasprintf(GFP_KERNEL, "%d", |
|
xen_store_evtchn); |
|
if (!file->private_data) |
|
return -ENOMEM; |
|
return 0; |
|
} |
|
|
|
const struct file_operations xsd_port_file_ops = { |
|
.open = xsd_port_open, |
|
.read = xsd_read, |
|
.release = xsd_release, |
|
};
|
|
|