/**
* sysfs_get_class_device: get specific class device using the device's id
* @cls: sysfs_class to find the device on
* @name: name of the class device to look for
*
* Returns sysfs_class_device * on success and NULL on failure
*/
struct sysfs_class_device *sysfs_get_class_device(struct sysfs_class *cls,
const char *name)
{
char path[SYSFS_PATH_MAX];
struct sysfs_class_device *cdev = NULL;
if (!cls || !name) {
errno = EINVAL;
return NULL;
}
if (cls->devices) {
cdev = (struct sysfs_class_device *)dlist_find_custom
(cls->devices, (void *)name, cdev_name_equal);
if (cdev)
return cdev;
}
safestrcpy(path, cls->path);
safestrcat(path, "/");
safestrcat(path, name);
cdev = sysfs_open_class_device_path(path);
if (!cdev) {
dprintf("Error opening class device at %s\n", path);
return NULL;
}
if (!cls->devices)
cls->devices = dlist_new_with_delete
(sizeof(struct sysfs_class_device),
sysfs_close_cls_dev);
dlist_unshift_sorted(cls->devices, cdev, sort_list);
return cdev;
}
/**
* Add class devices to list
*/
static void add_cdevs_to_classlist(struct sysfs_class *cls, struct dlist *list)
{
char path[SYSFS_PATH_MAX], *cdev_name;
struct sysfs_class_device *cdev = NULL;
if (cls == NULL || list == NULL)
return;
dlist_for_each_data(list, cdev_name, char) {
if (cls->devices) {
cdev = (struct sysfs_class_device *)
dlist_find_custom(cls->devices,
(void *)cdev_name, cdev_name_equal);
if (cdev)
continue;
}
safestrcpy(path, cls->path);
safestrcat(path, "/");
safestrcat(path, cdev_name);
cdev = sysfs_open_class_device_path(path);
if (cdev) {
if (!cls->devices)
cls->devices = dlist_new_with_delete
(sizeof(struct sysfs_class_device),
sysfs_close_cls_dev);
dlist_unshift_sorted(cls->devices, cdev,
sort_list);
}
}
}
static int refresh_exported_devices(void)
{
struct sysfs_device *suinf; /* sysfs_device of usb_interface */
struct dlist *suinf_list;
struct sysfs_device *sudev; /* sysfs_device of usb_device */
struct dlist *sudev_list;
sudev_list = dlist_new_with_delete(sizeof(struct sysfs_device), delete_nothing);
suinf_list = sysfs_get_driver_devices(stub_driver->sysfs_driver);
if (!suinf_list) {
printf("Bind usbip.ko to a usb device to be exportable!\n");
goto bye;
}
/* collect unique USB devices (not interfaces) */
dlist_for_each_data(suinf_list, suinf, struct sysfs_device) {
/* get usb device of this usb interface */
sudev = sysfs_get_device_parent(suinf);
if (!sudev) {
err("get parent dev of %s", suinf->name);
continue;
}
if (check_new(sudev_list, sudev)) {
dlist_unshift(sudev_list, sudev);
}
}
/**
* sysfs_get_bus_driver: Get specific driver on bus using driver name
* @bus: bus to find driver on
* @drvname: name of driver
* returns struct sysfs_driver reference or NULL if not found.
*/
struct sysfs_driver *sysfs_get_bus_driver(struct sysfs_bus *bus,
const char *drvname)
{
struct sysfs_driver *drv;
char drvpath[SYSFS_PATH_MAX];
if (!bus || !drvname) {
errno = EINVAL;
return NULL;
}
if (bus->drivers) {
drv = (struct sysfs_driver *)dlist_find_custom
(bus->drivers, (void *)drvname, name_equal);
if (drv)
return drv;
}
safestrcpy(drvpath, bus->path);
safestrcat(drvpath, "/");
safestrcat(drvpath, SYSFS_DRIVERS_NAME);
safestrcat(drvpath, "/");
safestrcat(drvpath, drvname);
drv = sysfs_open_driver_path(drvpath);
if (!drv) {
dprintf("Error opening driver at %s\n", drvpath);
return NULL;
}
if (!bus->drivers)
bus->drivers = dlist_new_with_delete
(sizeof(struct sysfs_driver),
sysfs_close_drv);
dlist_unshift_sorted(bus->drivers, drv, sort_list);
return drv;
}
/**
* add_attribute: open and add attribute at path to given directory
* @dev: device whose attribute is to be added
* @path: path to attribute
* returns pointer to attr added with success and NULL with error.
*/
static struct sysfs_attribute *add_attribute(void *dev, const char *path)
{
struct sysfs_attribute *attr;
attr = sysfs_open_attribute(path);
if (!attr) {
dprintf("Error opening attribute %s\n", path);
return NULL;
}
if (attr->method & SYSFS_METHOD_SHOW) {
if (sysfs_read_attribute(attr)) {
dprintf("Error reading attribute %s\n", path);
sysfs_close_attribute(attr);
return NULL;
}
}
if (!((struct sysfs_device *)dev)->attrlist) {
((struct sysfs_device *)dev)->attrlist = dlist_new_with_delete
(sizeof(struct sysfs_attribute), sysfs_del_attribute);
}
dlist_unshift_sorted(((struct sysfs_device *)dev)->attrlist,
attr, sort_list);
return attr;
}
/**
* sysfs_get_bus_devices: gets all devices for bus
* @bus: bus to get devices for
* returns dlist of devices with success and NULL with failure
*/
struct dlist *sysfs_get_bus_devices(struct sysfs_bus *bus)
{
struct sysfs_device *dev;
struct dlist *linklist;
char path[SYSFS_PATH_MAX], devpath[SYSFS_PATH_MAX];
char target[SYSFS_PATH_MAX];
char *curlink;
if (!bus) {
errno = EINVAL;
return NULL;
}
memset(path, 0, SYSFS_PATH_MAX);
safestrcpy(path, bus->path);
safestrcat(path, "/");
safestrcat(path, SYSFS_DEVICES_NAME);
linklist = read_dir_links(path);
if (linklist) {
dlist_for_each_data(linklist, curlink, char) {
if (bus->devices) {
dev = (struct sysfs_device *)
dlist_find_custom(bus->devices,
(void *)curlink, name_equal);
if (dev)
continue;
}
safestrcpy(devpath, path);
safestrcat(devpath, "/");
safestrcat(devpath, curlink);
if (sysfs_get_link(devpath, target, SYSFS_PATH_MAX)) {
dprintf("Error getting link - %s\n", devpath);
continue;
}
dev = sysfs_open_device_path(target);
if (!dev) {
dprintf("Error opening device at %s\n",
target);
continue;
}
if (!bus->devices)
bus->devices = dlist_new_with_delete
(sizeof(struct sysfs_device),
sysfs_close_dev);
dlist_unshift_sorted(bus->devices, dev, sort_list);
}
sysfs_close_list(linklist);
}
return (bus->devices);
}
/**
* sysfs_get_bus_drivers: gets all drivers for bus
* @bus: bus to get devices for
* returns dlist of devices with success and NULL with failure
*/
struct dlist *sysfs_get_bus_drivers(struct sysfs_bus *bus)
{
struct sysfs_driver *drv;
struct dlist *dirlist;
char path[SYSFS_PATH_MAX], drvpath[SYSFS_PATH_MAX];
char *curdir;
if (!bus) {
errno = EINVAL;
return NULL;
}
memset(path, 0, SYSFS_PATH_MAX);
safestrcpy(path, bus->path);
safestrcat(path, "/");
safestrcat(path, SYSFS_DRIVERS_NAME);
dirlist = read_dir_subdirs(path);
if (dirlist) {
dlist_for_each_data(dirlist, curdir, char) {
if (bus->drivers) {
drv = (struct sysfs_driver *)
dlist_find_custom(bus->drivers,
(void *)curdir, name_equal);
if (drv)
continue;
}
safestrcpy(drvpath, path);
safestrcat(drvpath, "/");
safestrcat(drvpath, curdir);
drv = sysfs_open_driver_path(drvpath);
if (!drv) {
dprintf("Error opening driver at %s\n",
drvpath);
continue;
}
if (!bus->drivers)
bus->drivers = dlist_new_with_delete
(sizeof(struct sysfs_driver),
sysfs_close_drv);
dlist_unshift_sorted(bus->drivers, drv, sort_list);
}
sysfs_close_list(dirlist);
}
return (bus->drivers);
}
int add_subdirectory(struct sysfs_device *dev, char *path)
{
struct sysfs_device *newdev;
if (!path)
return -1;
newdev = sysfs_open_device_path(path);
if (newdev == NULL)
return -1;
if (dev->children == NULL)
dev->children = dlist_new_with_delete(
sizeof(struct sysfs_device), sysfs_close_dev_tree);
dlist_unshift_sorted(dev->children, newdev, sort_list);
return 0;
}
/**
* read_dir_subdirs: grabs subdirs in a specific directory
* @sysdir: sysfs directory to read
* returns list of directory names with success and NULL with error.
*/
struct dlist *read_dir_subdirs(const char *path)
{
DIR *dir = NULL;
struct dirent *dirent = NULL;
char file_path[SYSFS_PATH_MAX], *dir_name;
struct dlist *dirlist = NULL;
if (!path) {
errno = EINVAL;
return NULL;
}
dir = opendir(path);
if (!dir) {
dprintf("Error opening directory %s\n", path);
return NULL;
}
while ((dirent = readdir(dir)) != NULL) {
if (0 == strcmp(dirent->d_name, "."))
continue;
if (0 == strcmp(dirent->d_name, ".."))
continue;
memset(file_path, 0, SYSFS_PATH_MAX);
safestrcpy(file_path, path);
safestrcat(file_path, "/");
safestrcat(file_path, dirent->d_name);
if (!sysfs_path_is_dir(file_path)) {
if (!dirlist) {
dirlist = dlist_new_with_delete
(SYSFS_NAME_LEN, sysfs_del_name);
if (!dirlist) {
dprintf("Error creating list\n");
return NULL;
}
}
dir_name = (char *)calloc(1, SYSFS_NAME_LEN);
safestrcpymax(dir_name, dirent->d_name, SYSFS_NAME_LEN);
dlist_unshift_sorted(dirlist, dir_name, sort_char);
}
}
closedir(dir);
return dirlist;
}
int usbip_stub_driver_open(void)
{
int ret;
stub_driver = (struct usbip_stub_driver *) calloc(1, sizeof(*stub_driver));
if (!stub_driver) {
err("alloc stub_driver");
return -1;
}
stub_driver->ndevs = 0;
stub_driver->edev_list = dlist_new_with_delete(sizeof(struct usbip_exported_device),
usbip_exported_device_delete);
if (!stub_driver->edev_list) {
err("alloc dlist");
goto err;
}
stub_driver->sysfs_driver = open_sysfs_stub_driver();
if (!stub_driver->sysfs_driver)
goto err;
ret = refresh_exported_devices();
if (ret < 0)
goto err;
return 0;
err:
if (stub_driver->sysfs_driver)
sysfs_close_driver(stub_driver->sysfs_driver);
if (stub_driver->edev_list)
dlist_destroy(stub_driver->edev_list);
free(stub_driver);
stub_driver = NULL;
return -1;
}
/**
* get_attributes_list: build a list of attributes for the given path
* @path: grab attributes at the given path
* returns dlist of attributes on success and NULL on failure
*/
struct dlist *get_attributes_list(struct dlist *alist, const char *path)
{
DIR *dir = NULL;
struct dirent *dirent = NULL;
char file_path[SYSFS_PATH_MAX];
if (!path) {
errno = EINVAL;
return NULL;
}
dir = opendir(path);
if (!dir) {
dprintf("Error opening directory %s\n", path);
return NULL;
}
while ((dirent = readdir(dir)) != NULL) {
if (0 == strcmp(dirent->d_name, "."))
continue;
if (0 == strcmp(dirent->d_name, ".."))
continue;
memset(file_path, 0, SYSFS_PATH_MAX);
safestrcpy(file_path, path);
safestrcat(file_path, "/");
safestrcat(file_path, dirent->d_name);
if (!sysfs_path_is_file(file_path)) {
if (!alist) {
alist = dlist_new_with_delete
(sizeof(struct sysfs_attribute),
sysfs_del_attribute);
if (!alist) {
dprintf("Error creating list\n");
return NULL;
}
}
add_attribute_to_list(alist, file_path);
}
}
closedir(dir);
return alist;
}
/**
* sysfs_get_driver_devices: gets list of devices that use the driver
* @drv: sysfs_driver whose device list is needed
* Returns dlist of struct sysfs_device on success and NULL on failure
*/
struct dlist *sysfs_get_driver_devices(struct sysfs_driver *drv)
{
char *ln = NULL;
struct dlist *linklist = NULL;
struct sysfs_device *dev = NULL;
if (!drv) {
errno = EINVAL;
return NULL;
}
linklist = read_dir_links(drv->path);
if (linklist) {
dlist_for_each_data(linklist, ln, char) {
if (!strncmp(ln, SYSFS_MODULE_NAME, strlen(ln)))
continue;
dev = sysfs_open_device(drv->bus, ln);
if (!dev) {
dprintf("Error opening driver's device\n");
sysfs_close_list(linklist);
return NULL;
}
if (!drv->devices) {
drv->devices = dlist_new_with_delete
(sizeof(struct sysfs_device),
sysfs_close_driver_device);
if (!drv->devices) {
dprintf("Error creating device list\n");
sysfs_close_list(linklist);
return NULL;
}
}
dlist_unshift_sorted(drv->devices, dev, sort_list);
}
sysfs_close_list(linklist);
}
return drv->devices;
}
/**
* sysfs_get_bus_device: Get specific device on bus using device's id
* @bus: bus to find device on
* @id: bus_id for device
* returns struct sysfs_device reference or NULL if not found.
*/
struct sysfs_device *sysfs_get_bus_device(struct sysfs_bus *bus,
const char *id)
{
struct sysfs_device *dev = NULL;
char devpath[SYSFS_PATH_MAX], target[SYSFS_PATH_MAX];
if (!bus || !id) {
errno = EINVAL;
return NULL;
}
if (bus->devices) {
dev = (struct sysfs_device *)dlist_find_custom
(bus->devices, (void *)id, name_equal);
if (dev)
return dev;
}
safestrcpy(devpath, bus->path);
safestrcat(devpath, "/");
safestrcat(devpath, SYSFS_DEVICES_NAME);
safestrcat(devpath, "/");
safestrcat(devpath, id);
if (sysfs_path_is_link(devpath)) {
dprintf("No such device %s on bus %s?\n", id, bus->name);
return NULL;
}
if (!sysfs_get_link(devpath, target, SYSFS_PATH_MAX)) {
dev = sysfs_open_device_path(target);
if (!dev) {
dprintf("Error opening device at %s\n", target);
return NULL;
}
if (!bus->devices)
bus->devices = dlist_new_with_delete
(sizeof(struct sysfs_device),
sysfs_close_dev);
dlist_unshift_sorted(bus->devices, dev, sort_list);
}
return dev;
}
int usbip_stub_refresh_device_list(void)
{
int ret;
if (stub_driver->edev_list)
dlist_destroy(stub_driver->edev_list);
stub_driver->ndevs = 0;
stub_driver->edev_list = dlist_new_with_delete(sizeof(struct usbip_exported_device),
usbip_exported_device_delete);
if (!stub_driver->edev_list) {
err("alloc dlist");
return -1;
}
ret = refresh_exported_devices();
if (ret < 0)
return ret;
return 0;
}
static int refresh_exported_devices(void)
{
/* sysfs_device of usb_interface */
struct sysfs_device *suintf;
struct dlist *suintf_list;
/* sysfs_device of usb_device */
struct sysfs_device *sudev;
struct dlist *sudev_list;
struct usbip_exported_device *edev;
sudev_list = dlist_new_with_delete(sizeof(struct sysfs_device),
delete_nothing);
suintf_list = sysfs_get_driver_devices(host_driver->sysfs_driver);
if (!suintf_list) {
/*
* Not an error condition. There are simply no devices bound to
* the driver yet.
*/
dbg("bind " USBIP_HOST_DRV_NAME ".ko to a usb device to be "
"exportable!");
return 0;
}
/* collect unique USB devices (not interfaces) */
dlist_for_each_data(suintf_list, suintf, struct sysfs_device) {
/* get usb device of this usb interface */
sudev = sysfs_get_device_parent(suintf);
if (!sudev) {
dbg("sysfs_get_device_parent failed: %s", suintf->name);
continue;
}
if (check_new(sudev_list, sudev)) {
/* insert item at head of list */
dlist_unshift(sudev_list, sudev);
}
}