743 lines
16 KiB
C
743 lines
16 KiB
C
|
/*
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* EFI Test Driver for Runtime Services
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*
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* Copyright(C) 2012-2016 Canonical Ltd.
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*
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* This driver exports EFI runtime services interfaces into userspace, which
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* allow to use and test UEFI runtime services provided by firmware.
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*
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*/
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#include <linux/miscdevice.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/proc_fs.h>
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#include <linux/efi.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include "efi_test.h"
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MODULE_AUTHOR("Ivan Hu <ivan.hu@canonical.com>");
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MODULE_DESCRIPTION("EFI Test Driver");
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MODULE_LICENSE("GPL");
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/*
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* Count the bytes in 'str', including the terminating NULL.
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*
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* Note this function returns the number of *bytes*, not the number of
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* ucs2 characters.
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*/
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static inline size_t user_ucs2_strsize(efi_char16_t __user *str)
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{
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efi_char16_t *s = str, c;
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size_t len;
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if (!str)
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return 0;
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/* Include terminating NULL */
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len = sizeof(efi_char16_t);
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if (get_user(c, s++)) {
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/* Can't read userspace memory for size */
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return 0;
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}
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while (c != 0) {
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if (get_user(c, s++)) {
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/* Can't read userspace memory for size */
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return 0;
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}
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len += sizeof(efi_char16_t);
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}
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return len;
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}
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/*
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* Allocate a buffer and copy a ucs2 string from user space into it.
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*/
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static inline int
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copy_ucs2_from_user_len(efi_char16_t **dst, efi_char16_t __user *src,
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size_t len)
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{
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efi_char16_t *buf;
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if (!src) {
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*dst = NULL;
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return 0;
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}
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if (!access_ok(VERIFY_READ, src, 1))
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return -EFAULT;
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buf = memdup_user(src, len);
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if (IS_ERR(buf)) {
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*dst = NULL;
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return PTR_ERR(buf);
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}
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*dst = buf;
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return 0;
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}
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/*
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* Count the bytes in 'str', including the terminating NULL.
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*
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* Just a wrap for user_ucs2_strsize
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*/
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static inline int
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get_ucs2_strsize_from_user(efi_char16_t __user *src, size_t *len)
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{
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if (!access_ok(VERIFY_READ, src, 1))
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return -EFAULT;
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*len = user_ucs2_strsize(src);
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if (*len == 0)
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return -EFAULT;
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return 0;
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}
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/*
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* Calculate the required buffer allocation size and copy a ucs2 string
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* from user space into it.
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*
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* This function differs from copy_ucs2_from_user_len() because it
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* calculates the size of the buffer to allocate by taking the length of
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* the string 'src'.
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*
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* If a non-zero value is returned, the caller MUST NOT access 'dst'.
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*
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* It is the caller's responsibility to free 'dst'.
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*/
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static inline int
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copy_ucs2_from_user(efi_char16_t **dst, efi_char16_t __user *src)
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{
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size_t len;
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if (!access_ok(VERIFY_READ, src, 1))
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return -EFAULT;
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len = user_ucs2_strsize(src);
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if (len == 0)
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return -EFAULT;
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return copy_ucs2_from_user_len(dst, src, len);
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}
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/*
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* Copy a ucs2 string to a user buffer.
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*
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* This function is a simple wrapper around copy_to_user() that does
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* nothing if 'src' is NULL, which is useful for reducing the amount of
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* NULL checking the caller has to do.
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*
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* 'len' specifies the number of bytes to copy.
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*/
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static inline int
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copy_ucs2_to_user_len(efi_char16_t __user *dst, efi_char16_t *src, size_t len)
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{
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if (!src)
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return 0;
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if (!access_ok(VERIFY_WRITE, dst, 1))
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return -EFAULT;
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return copy_to_user(dst, src, len);
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}
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static long efi_runtime_get_variable(unsigned long arg)
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{
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struct efi_getvariable __user *getvariable_user;
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struct efi_getvariable getvariable;
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unsigned long datasize = 0, prev_datasize, *dz;
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efi_guid_t vendor_guid, *vd = NULL;
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efi_status_t status;
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efi_char16_t *name = NULL;
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u32 attr, *at;
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void *data = NULL;
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int rv = 0;
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getvariable_user = (struct efi_getvariable __user *)arg;
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if (copy_from_user(&getvariable, getvariable_user,
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sizeof(getvariable)))
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return -EFAULT;
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if (getvariable.data_size &&
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get_user(datasize, getvariable.data_size))
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return -EFAULT;
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if (getvariable.vendor_guid) {
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if (copy_from_user(&vendor_guid, getvariable.vendor_guid,
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sizeof(vendor_guid)))
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return -EFAULT;
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vd = &vendor_guid;
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}
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if (getvariable.variable_name) {
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rv = copy_ucs2_from_user(&name, getvariable.variable_name);
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if (rv)
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return rv;
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}
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at = getvariable.attributes ? &attr : NULL;
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dz = getvariable.data_size ? &datasize : NULL;
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if (getvariable.data_size && getvariable.data) {
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data = kmalloc(datasize, GFP_KERNEL);
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if (!data) {
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kfree(name);
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return -ENOMEM;
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}
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}
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prev_datasize = datasize;
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status = efi.get_variable(name, vd, at, dz, data);
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kfree(name);
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if (put_user(status, getvariable.status)) {
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rv = -EFAULT;
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goto out;
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}
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if (status != EFI_SUCCESS) {
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if (status == EFI_BUFFER_TOO_SMALL) {
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if (dz && put_user(datasize, getvariable.data_size)) {
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rv = -EFAULT;
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goto out;
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}
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}
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rv = -EINVAL;
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goto out;
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}
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if (prev_datasize < datasize) {
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rv = -EINVAL;
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goto out;
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}
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if (data) {
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if (copy_to_user(getvariable.data, data, datasize)) {
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rv = -EFAULT;
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goto out;
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}
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}
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if (at && put_user(attr, getvariable.attributes)) {
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rv = -EFAULT;
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goto out;
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}
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if (dz && put_user(datasize, getvariable.data_size))
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rv = -EFAULT;
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out:
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kfree(data);
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return rv;
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}
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static long efi_runtime_set_variable(unsigned long arg)
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{
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struct efi_setvariable __user *setvariable_user;
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struct efi_setvariable setvariable;
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efi_guid_t vendor_guid;
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efi_status_t status;
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efi_char16_t *name = NULL;
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void *data;
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int rv = 0;
|
||
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setvariable_user = (struct efi_setvariable __user *)arg;
|
||
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if (copy_from_user(&setvariable, setvariable_user, sizeof(setvariable)))
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||
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return -EFAULT;
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||
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if (copy_from_user(&vendor_guid, setvariable.vendor_guid,
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||
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sizeof(vendor_guid)))
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return -EFAULT;
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||
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if (setvariable.variable_name) {
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rv = copy_ucs2_from_user(&name, setvariable.variable_name);
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if (rv)
|
||
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return rv;
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||
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}
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data = memdup_user(setvariable.data, setvariable.data_size);
|
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if (IS_ERR(data)) {
|
||
|
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kfree(name);
|
||
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return PTR_ERR(data);
|
||
|
|
}
|
||
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|
|
||
|
|
status = efi.set_variable(name, &vendor_guid,
|
||
|
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setvariable.attributes,
|
||
|
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setvariable.data_size, data);
|
||
|
|
|
||
|
|
if (put_user(status, setvariable.status)) {
|
||
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|
rv = -EFAULT;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
rv = status == EFI_SUCCESS ? 0 : -EINVAL;
|
||
|
|
|
||
|
|
out:
|
||
|
|
kfree(data);
|
||
|
|
kfree(name);
|
||
|
|
|
||
|
|
return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static long efi_runtime_get_time(unsigned long arg)
|
||
|
|
{
|
||
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|
struct efi_gettime __user *gettime_user;
|
||
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struct efi_gettime gettime;
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||
|
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efi_status_t status;
|
||
|
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efi_time_cap_t cap;
|
||
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efi_time_t efi_time;
|
||
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||
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gettime_user = (struct efi_gettime __user *)arg;
|
||
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if (copy_from_user(&gettime, gettime_user, sizeof(gettime)))
|
||
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return -EFAULT;
|
||
|
|
|
||
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|
status = efi.get_time(gettime.time ? &efi_time : NULL,
|
||
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gettime.capabilities ? &cap : NULL);
|
||
|
|
|
||
|
|
if (put_user(status, gettime.status))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
if (status != EFI_SUCCESS)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (gettime.capabilities) {
|
||
|
|
efi_time_cap_t __user *cap_local;
|
||
|
|
|
||
|
|
cap_local = (efi_time_cap_t *)gettime.capabilities;
|
||
|
|
if (put_user(cap.resolution, &(cap_local->resolution)) ||
|
||
|
|
put_user(cap.accuracy, &(cap_local->accuracy)) ||
|
||
|
|
put_user(cap.sets_to_zero, &(cap_local->sets_to_zero)))
|
||
|
|
return -EFAULT;
|
||
|
|
}
|
||
|
|
if (gettime.time) {
|
||
|
|
if (copy_to_user(gettime.time, &efi_time, sizeof(efi_time_t)))
|
||
|
|
return -EFAULT;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static long efi_runtime_set_time(unsigned long arg)
|
||
|
|
{
|
||
|
|
struct efi_settime __user *settime_user;
|
||
|
|
struct efi_settime settime;
|
||
|
|
efi_status_t status;
|
||
|
|
efi_time_t efi_time;
|
||
|
|
|
||
|
|
settime_user = (struct efi_settime __user *)arg;
|
||
|
|
if (copy_from_user(&settime, settime_user, sizeof(settime)))
|
||
|
|
return -EFAULT;
|
||
|
|
if (copy_from_user(&efi_time, settime.time,
|
||
|
|
sizeof(efi_time_t)))
|
||
|
|
return -EFAULT;
|
||
|
|
status = efi.set_time(&efi_time);
|
||
|
|
|
||
|
|
if (put_user(status, settime.status))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
return status == EFI_SUCCESS ? 0 : -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static long efi_runtime_get_waketime(unsigned long arg)
|
||
|
|
{
|
||
|
|
struct efi_getwakeuptime __user *getwakeuptime_user;
|
||
|
|
struct efi_getwakeuptime getwakeuptime;
|
||
|
|
efi_bool_t enabled, pending;
|
||
|
|
efi_status_t status;
|
||
|
|
efi_time_t efi_time;
|
||
|
|
|
||
|
|
getwakeuptime_user = (struct efi_getwakeuptime __user *)arg;
|
||
|
|
if (copy_from_user(&getwakeuptime, getwakeuptime_user,
|
||
|
|
sizeof(getwakeuptime)))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
status = efi.get_wakeup_time(
|
||
|
|
getwakeuptime.enabled ? (efi_bool_t *)&enabled : NULL,
|
||
|
|
getwakeuptime.pending ? (efi_bool_t *)&pending : NULL,
|
||
|
|
getwakeuptime.time ? &efi_time : NULL);
|
||
|
|
|
||
|
|
if (put_user(status, getwakeuptime.status))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
if (status != EFI_SUCCESS)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (getwakeuptime.enabled && put_user(enabled,
|
||
|
|
getwakeuptime.enabled))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
if (getwakeuptime.time) {
|
||
|
|
if (copy_to_user(getwakeuptime.time, &efi_time,
|
||
|
|
sizeof(efi_time_t)))
|
||
|
|
return -EFAULT;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static long efi_runtime_set_waketime(unsigned long arg)
|
||
|
|
{
|
||
|
|
struct efi_setwakeuptime __user *setwakeuptime_user;
|
||
|
|
struct efi_setwakeuptime setwakeuptime;
|
||
|
|
efi_bool_t enabled;
|
||
|
|
efi_status_t status;
|
||
|
|
efi_time_t efi_time;
|
||
|
|
|
||
|
|
setwakeuptime_user = (struct efi_setwakeuptime __user *)arg;
|
||
|
|
|
||
|
|
if (copy_from_user(&setwakeuptime, setwakeuptime_user,
|
||
|
|
sizeof(setwakeuptime)))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
enabled = setwakeuptime.enabled;
|
||
|
|
if (setwakeuptime.time) {
|
||
|
|
if (copy_from_user(&efi_time, setwakeuptime.time,
|
||
|
|
sizeof(efi_time_t)))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
status = efi.set_wakeup_time(enabled, &efi_time);
|
||
|
|
} else
|
||
|
|
status = efi.set_wakeup_time(enabled, NULL);
|
||
|
|
|
||
|
|
if (put_user(status, setwakeuptime.status))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
return status == EFI_SUCCESS ? 0 : -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static long efi_runtime_get_nextvariablename(unsigned long arg)
|
||
|
|
{
|
||
|
|
struct efi_getnextvariablename __user *getnextvariablename_user;
|
||
|
|
struct efi_getnextvariablename getnextvariablename;
|
||
|
|
unsigned long name_size, prev_name_size = 0, *ns = NULL;
|
||
|
|
efi_status_t status;
|
||
|
|
efi_guid_t *vd = NULL;
|
||
|
|
efi_guid_t vendor_guid;
|
||
|
|
efi_char16_t *name = NULL;
|
||
|
|
int rv = 0;
|
||
|
|
|
||
|
|
getnextvariablename_user = (struct efi_getnextvariablename __user *)arg;
|
||
|
|
|
||
|
|
if (copy_from_user(&getnextvariablename, getnextvariablename_user,
|
||
|
|
sizeof(getnextvariablename)))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
if (getnextvariablename.variable_name_size) {
|
||
|
|
if (get_user(name_size, getnextvariablename.variable_name_size))
|
||
|
|
return -EFAULT;
|
||
|
|
ns = &name_size;
|
||
|
|
prev_name_size = name_size;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (getnextvariablename.vendor_guid) {
|
||
|
|
if (copy_from_user(&vendor_guid,
|
||
|
|
getnextvariablename.vendor_guid,
|
||
|
|
sizeof(vendor_guid)))
|
||
|
|
return -EFAULT;
|
||
|
|
vd = &vendor_guid;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (getnextvariablename.variable_name) {
|
||
|
|
size_t name_string_size = 0;
|
||
|
|
|
||
|
|
rv = get_ucs2_strsize_from_user(
|
||
|
|
getnextvariablename.variable_name,
|
||
|
|
&name_string_size);
|
||
|
|
if (rv)
|
||
|
|
return rv;
|
||
|
|
/*
|
||
|
|
* The name_size may be smaller than the real buffer size where
|
||
|
|
* variable name located in some use cases. The most typical
|
||
|
|
* case is passing a 0 to get the required buffer size for the
|
||
|
|
* 1st time call. So we need to copy the content from user
|
||
|
|
* space for at least the string size of variable name, or else
|
||
|
|
* the name passed to UEFI may not be terminated as we expected.
|
||
|
|
*/
|
||
|
|
rv = copy_ucs2_from_user_len(&name,
|
||
|
|
getnextvariablename.variable_name,
|
||
|
|
prev_name_size > name_string_size ?
|
||
|
|
prev_name_size : name_string_size);
|
||
|
|
if (rv)
|
||
|
|
return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
status = efi.get_next_variable(ns, name, vd);
|
||
|
|
|
||
|
|
if (put_user(status, getnextvariablename.status)) {
|
||
|
|
rv = -EFAULT;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (status != EFI_SUCCESS) {
|
||
|
|
if (status == EFI_BUFFER_TOO_SMALL) {
|
||
|
|
if (ns && put_user(*ns,
|
||
|
|
getnextvariablename.variable_name_size)) {
|
||
|
|
rv = -EFAULT;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
rv = -EINVAL;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (name) {
|
||
|
|
if (copy_ucs2_to_user_len(getnextvariablename.variable_name,
|
||
|
|
name, prev_name_size)) {
|
||
|
|
rv = -EFAULT;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ns) {
|
||
|
|
if (put_user(*ns, getnextvariablename.variable_name_size)) {
|
||
|
|
rv = -EFAULT;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (vd) {
|
||
|
|
if (copy_to_user(getnextvariablename.vendor_guid, vd,
|
||
|
|
sizeof(efi_guid_t)))
|
||
|
|
rv = -EFAULT;
|
||
|
|
}
|
||
|
|
|
||
|
|
out:
|
||
|
|
kfree(name);
|
||
|
|
return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static long efi_runtime_get_nexthighmonocount(unsigned long arg)
|
||
|
|
{
|
||
|
|
struct efi_getnexthighmonotoniccount __user *getnexthighmonocount_user;
|
||
|
|
struct efi_getnexthighmonotoniccount getnexthighmonocount;
|
||
|
|
efi_status_t status;
|
||
|
|
u32 count;
|
||
|
|
|
||
|
|
getnexthighmonocount_user = (struct
|
||
|
|
efi_getnexthighmonotoniccount __user *)arg;
|
||
|
|
|
||
|
|
if (copy_from_user(&getnexthighmonocount,
|
||
|
|
getnexthighmonocount_user,
|
||
|
|
sizeof(getnexthighmonocount)))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
status = efi.get_next_high_mono_count(
|
||
|
|
getnexthighmonocount.high_count ? &count : NULL);
|
||
|
|
|
||
|
|
if (put_user(status, getnexthighmonocount.status))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
if (status != EFI_SUCCESS)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (getnexthighmonocount.high_count &&
|
||
|
|
put_user(count, getnexthighmonocount.high_count))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static long efi_runtime_query_variableinfo(unsigned long arg)
|
||
|
|
{
|
||
|
|
struct efi_queryvariableinfo __user *queryvariableinfo_user;
|
||
|
|
struct efi_queryvariableinfo queryvariableinfo;
|
||
|
|
efi_status_t status;
|
||
|
|
u64 max_storage, remaining, max_size;
|
||
|
|
|
||
|
|
queryvariableinfo_user = (struct efi_queryvariableinfo __user *)arg;
|
||
|
|
|
||
|
|
if (copy_from_user(&queryvariableinfo, queryvariableinfo_user,
|
||
|
|
sizeof(queryvariableinfo)))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
status = efi.query_variable_info(queryvariableinfo.attributes,
|
||
|
|
&max_storage, &remaining, &max_size);
|
||
|
|
|
||
|
|
if (put_user(status, queryvariableinfo.status))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
if (status != EFI_SUCCESS)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (put_user(max_storage,
|
||
|
|
queryvariableinfo.maximum_variable_storage_size))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
if (put_user(remaining,
|
||
|
|
queryvariableinfo.remaining_variable_storage_size))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
if (put_user(max_size, queryvariableinfo.maximum_variable_size))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static long efi_runtime_query_capsulecaps(unsigned long arg)
|
||
|
|
{
|
||
|
|
struct efi_querycapsulecapabilities __user *qcaps_user;
|
||
|
|
struct efi_querycapsulecapabilities qcaps;
|
||
|
|
efi_capsule_header_t *capsules;
|
||
|
|
efi_status_t status;
|
||
|
|
u64 max_size;
|
||
|
|
int i, reset_type;
|
||
|
|
int rv = 0;
|
||
|
|
|
||
|
|
qcaps_user = (struct efi_querycapsulecapabilities __user *)arg;
|
||
|
|
|
||
|
|
if (copy_from_user(&qcaps, qcaps_user, sizeof(qcaps)))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
if (qcaps.capsule_count == ULONG_MAX)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
capsules = kcalloc(qcaps.capsule_count + 1,
|
||
|
|
sizeof(efi_capsule_header_t), GFP_KERNEL);
|
||
|
|
if (!capsules)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
for (i = 0; i < qcaps.capsule_count; i++) {
|
||
|
|
efi_capsule_header_t *c;
|
||
|
|
/*
|
||
|
|
* We cannot dereference qcaps.capsule_header_array directly to
|
||
|
|
* obtain the address of the capsule as it resides in the
|
||
|
|
* user space
|
||
|
|
*/
|
||
|
|
if (get_user(c, qcaps.capsule_header_array + i)) {
|
||
|
|
rv = -EFAULT;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
if (copy_from_user(&capsules[i], c,
|
||
|
|
sizeof(efi_capsule_header_t))) {
|
||
|
|
rv = -EFAULT;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
qcaps.capsule_header_array = &capsules;
|
||
|
|
|
||
|
|
status = efi.query_capsule_caps((efi_capsule_header_t **)
|
||
|
|
qcaps.capsule_header_array,
|
||
|
|
qcaps.capsule_count,
|
||
|
|
&max_size, &reset_type);
|
||
|
|
|
||
|
|
if (put_user(status, qcaps.status)) {
|
||
|
|
rv = -EFAULT;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (status != EFI_SUCCESS) {
|
||
|
|
rv = -EINVAL;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (put_user(max_size, qcaps.maximum_capsule_size)) {
|
||
|
|
rv = -EFAULT;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (put_user(reset_type, qcaps.reset_type))
|
||
|
|
rv = -EFAULT;
|
||
|
|
|
||
|
|
out:
|
||
|
|
kfree(capsules);
|
||
|
|
return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
static long efi_test_ioctl(struct file *file, unsigned int cmd,
|
||
|
|
unsigned long arg)
|
||
|
|
{
|
||
|
|
switch (cmd) {
|
||
|
|
case EFI_RUNTIME_GET_VARIABLE:
|
||
|
|
return efi_runtime_get_variable(arg);
|
||
|
|
|
||
|
|
case EFI_RUNTIME_SET_VARIABLE:
|
||
|
|
return efi_runtime_set_variable(arg);
|
||
|
|
|
||
|
|
case EFI_RUNTIME_GET_TIME:
|
||
|
|
return efi_runtime_get_time(arg);
|
||
|
|
|
||
|
|
case EFI_RUNTIME_SET_TIME:
|
||
|
|
return efi_runtime_set_time(arg);
|
||
|
|
|
||
|
|
case EFI_RUNTIME_GET_WAKETIME:
|
||
|
|
return efi_runtime_get_waketime(arg);
|
||
|
|
|
||
|
|
case EFI_RUNTIME_SET_WAKETIME:
|
||
|
|
return efi_runtime_set_waketime(arg);
|
||
|
|
|
||
|
|
case EFI_RUNTIME_GET_NEXTVARIABLENAME:
|
||
|
|
return efi_runtime_get_nextvariablename(arg);
|
||
|
|
|
||
|
|
case EFI_RUNTIME_GET_NEXTHIGHMONOTONICCOUNT:
|
||
|
|
return efi_runtime_get_nexthighmonocount(arg);
|
||
|
|
|
||
|
|
case EFI_RUNTIME_QUERY_VARIABLEINFO:
|
||
|
|
return efi_runtime_query_variableinfo(arg);
|
||
|
|
|
||
|
|
case EFI_RUNTIME_QUERY_CAPSULECAPABILITIES:
|
||
|
|
return efi_runtime_query_capsulecaps(arg);
|
||
|
|
}
|
||
|
|
|
||
|
|
return -ENOTTY;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int efi_test_open(struct inode *inode, struct file *file)
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* nothing special to do here
|
||
|
|
* We do accept multiple open files at the same time as we
|
||
|
|
* synchronize on the per call operation.
|
||
|
|
*/
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int efi_test_close(struct inode *inode, struct file *file)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The various file operations we support.
|
||
|
|
*/
|
||
|
|
static const struct file_operations efi_test_fops = {
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.unlocked_ioctl = efi_test_ioctl,
|
||
|
|
.open = efi_test_open,
|
||
|
|
.release = efi_test_close,
|
||
|
|
.llseek = no_llseek,
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct miscdevice efi_test_dev = {
|
||
|
|
MISC_DYNAMIC_MINOR,
|
||
|
|
"efi_test",
|
||
|
|
&efi_test_fops
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init efi_test_init(void)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = misc_register(&efi_test_dev);
|
||
|
|
if (ret) {
|
||
|
|
pr_err("efi_test: can't misc_register on minor=%d\n",
|
||
|
|
MISC_DYNAMIC_MINOR);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit efi_test_exit(void)
|
||
|
|
{
|
||
|
|
misc_deregister(&efi_test_dev);
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(efi_test_init);
|
||
|
|
module_exit(efi_test_exit);
|