[PATCH 10/18] staging: usbip: userspace: migrate vhci_driver to libudev

Valentina Manea
2014-03-08T12:56:45Z

This patch migrates vhci_driver to libudev.

Signed-off-by: Valentina Manea <valentina.manea.m@gmail.com>
Reviewed-by: Shuah Khan <shuah.kh@samsung.com>
---
.../staging/usbip/userspace/libsrc/usbip_common.h | 1 -
.../staging/usbip/userspace/libsrc/vhci_driver.c | 154 ++++++---------------
.../staging/usbip/userspace/libsrc/vhci_driver.h | 5 +-
3 files changed, 44 insertions(+), 116 deletions(-)

diff --git a/drivers/staging/usbip/userspace/libsrc/usbip_common.h b/drivers/staging/usbip/userspace/libsrc/usbip_common.h
index ed9b43b..23be848 100644
--- a/drivers/staging/usbip/userspace/libsrc/usbip_common.h
+++ b/drivers/staging/usbip/userspace/libsrc/usbip_common.h
@@ -5,7 +5,6 @@
#ifndef __USBIP_COMMON_H
#define __USBIP_COMMON_H

-#include <sysfs/libsysfs.h>
#include <libudev.h>

#include <stdint.h>
diff --git a/drivers/staging/usbip/userspace/libsrc/vhci_driver.c b/drivers/staging/usbip/userspace/libsrc/vhci_driver.c
index fa68bed..8901fcb 100644
--- a/drivers/staging/usbip/userspace/libsrc/vhci_driver.c
+++ b/drivers/staging/usbip/userspace/libsrc/vhci_driver.c
@@ -7,6 +7,7 @@
#include <limits.h>
#include <netdb.h>
#include <libudev.h>
+#include "sysfs_utils.h"

#undef PROGNAME
#define PROGNAME "libusbip"
@@ -36,7 +37,7 @@ err:

-static int parse_status(char *value)
+static int parse_status(const char *value)
{
int ret = 0;
char *c;
@@ -108,42 +109,33 @@ static int parse_status(char *value)

static int refresh_imported_device_list(void)
{
- struct sysfs_attribute *attr_status;
+ const char *attr_status;

-
- attr_status = sysfs_get_device_attr(vhci_driver->hc_device, "status");
+ attr_status = udev_device_get_sysattr_value(vhci_driver->hc_device,
+ "status");
if (!attr_status) {
- dbg("sysfs_get_device_attr(\"status\") failed: %s",
- vhci_driver->hc_device->name);
+ err("udev_device_get_sysattr_value failed");
return -1;
}

- dbg("name: %s path: %s len: %d method: %d value: %s",
- attr_status->name, attr_status->path, attr_status->len,
- attr_status->method, attr_status->value);
-
- return parse_status(attr_status->value);
+ return parse_status(attr_status);
}

static int get_nports(void)
{
char *c;
int nports = 0;
- struct sysfs_attribute *attr_status;
+ const char *attr_status;

- attr_status = sysfs_get_device_attr(vhci_driver->hc_device, "status");
+ attr_status = udev_device_get_sysattr_value(vhci_driver->hc_device,
+ "status");
if (!attr_status) {
- dbg("sysfs_get_device_attr(\"status\") failed: %s",
- vhci_driver->hc_device->name);
+ err("udev_device_get_sysattr_value failed");
return -1;
}

- dbg("name: %s path: %s len: %d method: %d value: %s",
- attr_status->name, attr_status->path, attr_status->len,
- attr_status->method, attr_status->value);
-
/* skip a header line */
- c = strchr(attr_status->value, '\n');
+ c = strchr(attr_status, '\n');
if (!c)
return 0;
c++;
@@ -160,50 +152,6 @@ static int get_nports(void)
return nports;
}

-static int get_hc_busid(char *sysfs_mntpath, char *hc_busid)
-{
- struct sysfs_driver *sdriver;
- char sdriver_path[SYSFS_PATH_MAX];
-
- struct sysfs_device *hc_dev;
- struct dlist *hc_devs;
-
- int found = 0;
-
- snprintf(sdriver_path, SYSFS_PATH_MAX, "%s/%s/%s/%s/%s", sysfs_mntpath,
- SYSFS_BUS_NAME, USBIP_VHCI_BUS_TYPE, SYSFS_DRIVERS_NAME,
- USBIP_VHCI_DRV_NAME);
-
- sdriver = sysfs_open_driver_path(sdriver_path);
- if (!sdriver) {
- dbg("sysfs_open_driver_path failed: %s", sdriver_path);
- dbg("make sure " USBIP_CORE_MOD_NAME ".ko and "
- USBIP_VHCI_DRV_NAME ".ko are loaded!");
- return -1;
- }
-
- hc_devs = sysfs_get_driver_devices(sdriver);
- if (!hc_devs) {
- dbg("sysfs_get_driver failed");
- goto err;
- }
-
- /* assume only one vhci_hcd */
- dlist_for_each_data(hc_devs, hc_dev, struct sysfs_device) {
- strncpy(hc_busid, hc_dev->bus_id, SYSFS_BUS_ID_SIZE);
- found = 1;
- }
-
-err:
- sysfs_close_driver(sdriver);
-
- if (found)
- return 0;
-
- dbg("%s not found", hc_busid);
- return -1;
-}
-
/*
* Read the given port's record.
*
@@ -215,7 +163,6 @@ err:
*/
static int read_record(int rhport, char *host, unsigned long host_len,
char *port, unsigned long port_len, char *busid)
-
{
int part;
FILE *file;
@@ -272,36 +219,21 @@ static int read_record(int rhport, char *host, unsigned long host_len,

int usbip_vhci_driver_open(void)
{
- int ret;
- char hc_busid[SYSFS_BUS_ID_SIZE];
-
udev_context = udev_new();
if (!udev_context) {
err("udev_new failed");
return -1;
}

- vhci_driver = (struct usbip_vhci_driver *) calloc(1, sizeof(*vhci_driver));
- if (!vhci_driver) {
- dbg("calloc failed");
- return -1;
- }
-
- ret = sysfs_get_mnt_path(vhci_driver->sysfs_mntpath, SYSFS_PATH_MAX);
- if (ret < 0) {
- dbg("sysfs_get_mnt_path failed");
- goto err;
- }
-
- ret = get_hc_busid(vhci_driver->sysfs_mntpath, hc_busid);
- if (ret < 0)
- goto err;
+ vhci_driver = calloc(1, sizeof(struct usbip_vhci_driver));

/* will be freed in usbip_driver_close() */
- vhci_driver->hc_device = sysfs_open_device(USBIP_VHCI_BUS_TYPE,
- hc_busid);
+ vhci_driver->hc_device =
+ udev_device_new_from_subsystem_sysname(udev_context,
+ USBIP_VHCI_BUS_TYPE,
+ USBIP_VHCI_DRV_NAME);
if (!vhci_driver->hc_device) {
- dbg("sysfs_open_device failed");
+ err("udev_device_new_from_subsystem_sysname failed");
goto err;
}

@@ -312,13 +244,11 @@ int usbip_vhci_driver_open(void)
if (refresh_imported_device_list())
goto err;

-
return 0;

-
err:
- if (vhci_driver->hc_device)
- sysfs_close_device(vhci_driver->hc_device);
+ udev_device_unref(vhci_driver->hc_device);
+
if (vhci_driver)
free(vhci_driver);

@@ -335,8 +265,8 @@ void usbip_vhci_driver_close()
if (!vhci_driver)
return;

- if (vhci_driver->hc_device)
- sysfs_close_device(vhci_driver->hc_device);
+ udev_device_unref(vhci_driver->hc_device);
+
free(vhci_driver);

vhci_driver = NULL;
@@ -370,24 +300,24 @@ int usbip_vhci_get_free_port(void)

int usbip_vhci_attach_device2(uint8_t port, int sockfd, uint32_t devid,
uint32_t speed) {
- struct sysfs_attribute *attr_attach;
char buff[200]; /* what size should be ? */
+ char attach_attr_path[SYSFS_PATH_MAX];
+ char attr_attach[] = "attach";
+ const char *path;
int ret;

- attr_attach = sysfs_get_device_attr(vhci_driver->hc_device, "attach");
- if (!attr_attach) {
- dbg("sysfs_get_device_attr(\"attach\") failed: %s",
- vhci_driver->hc_device->name);
- return -1;
- }
-
snprintf(buff, sizeof(buff), "%u %d %u %u",
port, sockfd, devid, speed);
dbg("writing: %s", buff);

- ret = sysfs_write_attribute(attr_attach, buff, strlen(buff));
+ path = udev_device_get_syspath(vhci_driver->hc_device);
+ snprintf(attach_attr_path, sizeof(attach_attr_path), "%s/%s",
+ path, attr_attach);
+ dbg("attach attribute path: %s", attach_attr_path);
+
+ ret = write_sysfs_attribute(attach_attr_path, buff, strlen(buff));
if (ret < 0) {
- dbg("sysfs_write_attribute failed");
+ dbg("write_sysfs_attribute failed");
return -1;
}

@@ -412,23 +342,23 @@ int usbip_vhci_attach_device(uint8_t port, int sockfd, uint8_t busnum,

int usbip_vhci_detach_device(uint8_t port)
{
- struct sysfs_attribute *attr_detach;
+ char detach_attr_path[SYSFS_PATH_MAX];
+ char attr_detach[] = "detach";
char buff[200]; /* what size should be ? */
+ const char *path;
int ret;

- attr_detach = sysfs_get_device_attr(vhci_driver->hc_device, "detach");
- if (!attr_detach) {
- dbg("sysfs_get_device_attr(\"detach\") failed: %s",
- vhci_driver->hc_device->name);
- return -1;
- }
-
snprintf(buff, sizeof(buff), "%u", port);
dbg("writing: %s", buff);

- ret = sysfs_write_attribute(attr_detach, buff, strlen(buff));
+ path = udev_device_get_syspath(vhci_driver->hc_device);
+ snprintf(detach_attr_path, sizeof(detach_attr_path), "%s/%s",
+ path, attr_detach);
+ dbg("detach attribute path: %s", detach_attr_path);
+
+ ret = write_sysfs_attribute(detach_attr_path, buff, strlen(buff));
if (ret < 0) {
- dbg("sysfs_write_attribute failed");
+ dbg("write_sysfs_attribute failed");
return -1;
}

diff --git a/drivers/staging/usbip/userspace/libsrc/vhci_driver.h b/drivers/staging/usbip/userspace/libsrc/vhci_driver.h
index 4d87a2a..fa2316c 100644
--- a/drivers/staging/usbip/userspace/libsrc/vhci_driver.h
+++ b/drivers/staging/usbip/userspace/libsrc/vhci_driver.h
@@ -5,7 +5,7 @@
#ifndef __VHCI_DRIVER_H
#define __VHCI_DRIVER_H

-#include <sysfs/libsysfs.h>
+#include <libudev.h>
#include <stdint.h>

#include "usbip_common.h"
@@ -27,10 +27,9 @@ struct usbip_imported_device {
};

struct usbip_vhci_driver {
- char sysfs_mntpath[SYSFS_PATH_MAX];

/* /sys/devices/platform/vhci_hcd */
- struct sysfs_device *hc_device;
+ struct udev_device *hc_device;

int nports;
struct usbip_imported_device idev[MAXNPORT];
--
1.8.1.2