#include #include #include #include #include #include "xenfs.h" #include "../xenbus/xenbus_comms.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, }; href='/cgit.cgi/linux/net-next.git/'>summaryrefs log tree commit diff

path: root/tools/testing/selftests/x86/test_mremap_vdso.c

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