283 lines
6.3 KiB
C
283 lines
6.3 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
/*
|
||
|
* Copyright (C) 2015-2016 Samsung Electronics
|
||
|
* Igor Kotrasinski <i.kotrasinsk@samsung.com>
|
||
|
* Krzysztof Opasiak <k.opasiak@samsung.com>
|
||
|
*
|
||
|
* Refactored from usbip_host_driver.c, which is:
|
||
|
* Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
|
||
|
* 2005-2007 Takahiro Hirofuchi
|
||
|
*/
|
||
|
|
||
|
#include <sys/types.h>
|
||
|
#include <sys/stat.h>
|
||
|
#include <fcntl.h>
|
||
|
|
||
|
#include <errno.h>
|
||
|
#include <unistd.h>
|
||
|
|
||
|
#include <libudev.h>
|
||
|
|
||
|
#include "usbip_common.h"
|
||
|
#include "usbip_host_common.h"
|
||
|
#include "list.h"
|
||
|
#include "sysfs_utils.h"
|
||
|
|
||
|
extern struct udev *udev_context;
|
||
|
|
||
|
static int32_t read_attr_usbip_status(struct usbip_usb_device *udev)
|
||
|
{
|
||
|
char status_attr_path[SYSFS_PATH_MAX];
|
||
|
int size;
|
||
|
int fd;
|
||
|
int length;
|
||
|
char status[2] = { 0 };
|
||
|
int value = 0;
|
||
|
|
||
|
size = snprintf(status_attr_path, sizeof(status_attr_path),
|
||
|
"%s/usbip_status", udev->path);
|
||
|
if (size < 0 || (unsigned int)size >= sizeof(status_attr_path)) {
|
||
|
err("usbip_status path length %i >= %lu or < 0", size,
|
||
|
(long unsigned)sizeof(status_attr_path));
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
|
||
|
fd = open(status_attr_path, O_RDONLY);
|
||
|
if (fd < 0) {
|
||
|
err("error opening attribute %s", status_attr_path);
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
length = read(fd, status, 1);
|
||
|
if (length < 0) {
|
||
|
err("error reading attribute %s", status_attr_path);
|
||
|
close(fd);
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
value = atoi(status);
|
||
|
close(fd);
|
||
|
return value;
|
||
|
}
|
||
|
|
||
|
static
|
||
|
struct usbip_exported_device *usbip_exported_device_new(
|
||
|
struct usbip_host_driver *hdriver, const char *sdevpath)
|
||
|
{
|
||
|
struct usbip_exported_device *edev = NULL;
|
||
|
struct usbip_exported_device *edev_old;
|
||
|
size_t size;
|
||
|
int i;
|
||
|
|
||
|
edev = calloc(1, sizeof(struct usbip_exported_device));
|
||
|
|
||
|
edev->sudev =
|
||
|
udev_device_new_from_syspath(udev_context, sdevpath);
|
||
|
if (!edev->sudev) {
|
||
|
err("udev_device_new_from_syspath: %s", sdevpath);
|
||
|
goto err;
|
||
|
}
|
||
|
|
||
|
if (hdriver->ops.read_device(edev->sudev, &edev->udev) < 0)
|
||
|
goto err;
|
||
|
|
||
|
edev->status = read_attr_usbip_status(&edev->udev);
|
||
|
if (edev->status < 0)
|
||
|
goto err;
|
||
|
|
||
|
/* reallocate buffer to include usb interface data */
|
||
|
size = sizeof(struct usbip_exported_device) +
|
||
|
edev->udev.bNumInterfaces * sizeof(struct usbip_usb_interface);
|
||
|
|
||
|
edev_old = edev;
|
||
|
edev = realloc(edev, size);
|
||
|
if (!edev) {
|
||
|
edev = edev_old;
|
||
|
dbg("realloc failed");
|
||
|
goto err;
|
||
|
}
|
||
|
|
||
|
for (i = 0; i < edev->udev.bNumInterfaces; i++) {
|
||
|
/* vudc does not support reading interfaces */
|
||
|
if (!hdriver->ops.read_interface)
|
||
|
break;
|
||
|
hdriver->ops.read_interface(&edev->udev, i, &edev->uinf[i]);
|
||
|
}
|
||
|
|
||
|
return edev;
|
||
|
err:
|
||
|
if (edev->sudev)
|
||
|
udev_device_unref(edev->sudev);
|
||
|
if (edev)
|
||
|
free(edev);
|
||
|
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
static int refresh_exported_devices(struct usbip_host_driver *hdriver)
|
||
|
{
|
||
|
struct usbip_exported_device *edev;
|
||
|
struct udev_enumerate *enumerate;
|
||
|
struct udev_list_entry *devices, *dev_list_entry;
|
||
|
struct udev_device *dev;
|
||
|
const char *path;
|
||
|
|
||
|
enumerate = udev_enumerate_new(udev_context);
|
||
|
udev_enumerate_add_match_subsystem(enumerate, hdriver->udev_subsystem);
|
||
|
udev_enumerate_scan_devices(enumerate);
|
||
|
|
||
|
devices = udev_enumerate_get_list_entry(enumerate);
|
||
|
|
||
|
udev_list_entry_foreach(dev_list_entry, devices) {
|
||
|
path = udev_list_entry_get_name(dev_list_entry);
|
||
|
dev = udev_device_new_from_syspath(udev_context,
|
||
|
path);
|
||
|
if (dev == NULL)
|
||
|
continue;
|
||
|
|
||
|
/* Check whether device uses usbip driver. */
|
||
|
if (hdriver->ops.is_my_device(dev)) {
|
||
|
edev = usbip_exported_device_new(hdriver, path);
|
||
|
if (!edev) {
|
||
|
dbg("usbip_exported_device_new failed");
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
list_add(&edev->node, &hdriver->edev_list);
|
||
|
hdriver->ndevs++;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static void usbip_exported_device_destroy(struct list_head *devs)
|
||
|
{
|
||
|
struct list_head *i, *tmp;
|
||
|
struct usbip_exported_device *edev;
|
||
|
|
||
|
list_for_each_safe(i, tmp, devs) {
|
||
|
edev = list_entry(i, struct usbip_exported_device, node);
|
||
|
list_del(i);
|
||
|
free(edev);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
int usbip_generic_driver_open(struct usbip_host_driver *hdriver)
|
||
|
{
|
||
|
int rc;
|
||
|
|
||
|
udev_context = udev_new();
|
||
|
if (!udev_context) {
|
||
|
err("udev_new failed");
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
rc = refresh_exported_devices(hdriver);
|
||
|
if (rc < 0)
|
||
|
goto err;
|
||
|
return 0;
|
||
|
err:
|
||
|
udev_unref(udev_context);
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
void usbip_generic_driver_close(struct usbip_host_driver *hdriver)
|
||
|
{
|
||
|
if (!hdriver)
|
||
|
return;
|
||
|
|
||
|
usbip_exported_device_destroy(&hdriver->edev_list);
|
||
|
|
||
|
udev_unref(udev_context);
|
||
|
}
|
||
|
|
||
|
int usbip_generic_refresh_device_list(struct usbip_host_driver *hdriver)
|
||
|
{
|
||
|
int rc;
|
||
|
|
||
|
usbip_exported_device_destroy(&hdriver->edev_list);
|
||
|
|
||
|
hdriver->ndevs = 0;
|
||
|
INIT_LIST_HEAD(&hdriver->edev_list);
|
||
|
|
||
|
rc = refresh_exported_devices(hdriver);
|
||
|
if (rc < 0)
|
||
|
return -1;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
int usbip_export_device(struct usbip_exported_device *edev, int sockfd)
|
||
|
{
|
||
|
char attr_name[] = "usbip_sockfd";
|
||
|
char sockfd_attr_path[SYSFS_PATH_MAX];
|
||
|
int size;
|
||
|
char sockfd_buff[30];
|
||
|
int ret;
|
||
|
|
||
|
if (edev->status != SDEV_ST_AVAILABLE) {
|
||
|
dbg("device not available: %s", edev->udev.busid);
|
||
|
switch (edev->status) {
|
||
|
case SDEV_ST_ERROR:
|
||
|
dbg("status SDEV_ST_ERROR");
|
||
|
ret = ST_DEV_ERR;
|
||
|
break;
|
||
|
case SDEV_ST_USED:
|
||
|
dbg("status SDEV_ST_USED");
|
||
|
ret = ST_DEV_BUSY;
|
||
|
break;
|
||
|
default:
|
||
|
dbg("status unknown: 0x%x", edev->status);
|
||
|
ret = -1;
|
||
|
}
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
/* only the first interface is true */
|
||
|
size = snprintf(sockfd_attr_path, sizeof(sockfd_attr_path), "%s/%s",
|
||
|
edev->udev.path, attr_name);
|
||
|
if (size < 0 || (unsigned int)size >= sizeof(sockfd_attr_path)) {
|
||
|
err("exported device path length %i >= %lu or < 0", size,
|
||
|
(long unsigned)sizeof(sockfd_attr_path));
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
size = snprintf(sockfd_buff, sizeof(sockfd_buff), "%d\n", sockfd);
|
||
|
if (size < 0 || (unsigned int)size >= sizeof(sockfd_buff)) {
|
||
|
err("socket length %i >= %lu or < 0", size,
|
||
|
(long unsigned)sizeof(sockfd_buff));
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
ret = write_sysfs_attribute(sockfd_attr_path, sockfd_buff,
|
||
|
strlen(sockfd_buff));
|
||
|
if (ret < 0) {
|
||
|
err("write_sysfs_attribute failed: sockfd %s to %s",
|
||
|
sockfd_buff, sockfd_attr_path);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
info("connect: %s", edev->udev.busid);
|
||
|
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
struct usbip_exported_device *usbip_generic_get_device(
|
||
|
struct usbip_host_driver *hdriver, int num)
|
||
|
{
|
||
|
struct list_head *i;
|
||
|
struct usbip_exported_device *edev;
|
||
|
int cnt = 0;
|
||
|
|
||
|
list_for_each(i, &hdriver->edev_list) {
|
||
|
edev = list_entry(i, struct usbip_exported_device, node);
|
||
|
if (num == cnt)
|
||
|
return edev;
|
||
|
cnt++;
|
||
|
}
|
||
|
|
||
|
return NULL;
|
||
|
}
|