![Roel Kluin](/assets/img/avatar_default.png)
kernel_thread may fail, notice this. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1010 lines
23 KiB
C
1010 lines
23 KiB
C
/*
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* Copyright (C) 2003-2008 Takahiro Hirofuchi
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#include <linux/kernel.h>
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#include <linux/file.h>
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#include <linux/tcp.h>
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#include <linux/in.h>
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#include "usbip_common.h"
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/* version information */
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#define DRIVER_VERSION "1.0"
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#define DRIVER_AUTHOR "Takahiro Hirofuchi <hirofuchi _at_ users.sourceforge.net>"
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#define DRIVER_DESC "usbip common driver"
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/*-------------------------------------------------------------------------*/
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/* debug routines */
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#ifdef CONFIG_USB_DEBUG
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unsigned long usbip_debug_flag = 0xffffffff;
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#else
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unsigned long usbip_debug_flag;
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#endif
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EXPORT_SYMBOL_GPL(usbip_debug_flag);
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/* FIXME */
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struct device_attribute dev_attr_usbip_debug;
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EXPORT_SYMBOL_GPL(dev_attr_usbip_debug);
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static ssize_t show_flag(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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return sprintf(buf, "%lx\n", usbip_debug_flag);
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}
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static ssize_t store_flag(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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unsigned long flag;
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sscanf(buf, "%lx", &flag);
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usbip_debug_flag = flag;
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return count;
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}
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DEVICE_ATTR(usbip_debug, (S_IRUGO | S_IWUSR), show_flag, store_flag);
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static void usbip_dump_buffer(char *buff, int bufflen)
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{
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int i;
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if (bufflen > 128) {
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for (i = 0; i < 128; i++) {
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if (i%24 == 0)
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printk(" ");
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printk("%02x ", (unsigned char) buff[i]);
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if (i%4 == 3)
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printk("| ");
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if (i%24 == 23)
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printk("\n");
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}
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printk("... (%d byte)\n", bufflen);
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return;
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}
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for (i = 0; i < bufflen; i++) {
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if (i%24 == 0)
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printk(" ");
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printk("%02x ", (unsigned char) buff[i]);
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if (i%4 == 3)
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printk("| ");
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if (i%24 == 23)
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printk("\n");
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}
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printk("\n");
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}
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static void usbip_dump_pipe(unsigned int p)
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{
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unsigned char type = usb_pipetype(p);
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unsigned char ep = usb_pipeendpoint(p);
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unsigned char dev = usb_pipedevice(p);
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unsigned char dir = usb_pipein(p);
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printk("dev(%d) ", dev);
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printk("ep(%d) ", ep);
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printk("%s ", dir ? "IN" : "OUT");
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switch (type) {
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case PIPE_ISOCHRONOUS:
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printk("%s ", "ISO");
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break;
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case PIPE_INTERRUPT:
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printk("%s ", "INT");
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break;
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case PIPE_CONTROL:
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printk("%s ", "CTL");
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break;
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case PIPE_BULK:
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printk("%s ", "BLK");
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break;
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default:
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printk("ERR");
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}
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printk("\n");
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}
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static void usbip_dump_usb_device(struct usb_device *udev)
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{
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struct device *dev = &udev->dev;
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int i;
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dev_dbg(dev, " devnum(%d) devpath(%s)",
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udev->devnum, udev->devpath);
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switch (udev->speed) {
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case USB_SPEED_HIGH:
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printk(" SPD_HIGH");
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break;
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case USB_SPEED_FULL:
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printk(" SPD_FULL");
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break;
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case USB_SPEED_LOW:
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printk(" SPD_LOW");
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break;
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case USB_SPEED_UNKNOWN:
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printk(" SPD_UNKNOWN");
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break;
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default:
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printk(" SPD_ERROR");
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}
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printk(" tt %p, ttport %d", udev->tt, udev->ttport);
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printk("\n");
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dev_dbg(dev, " ");
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for (i = 0; i < 16; i++)
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printk(" %2u", i);
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printk("\n");
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dev_dbg(dev, " toggle0(IN) :");
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for (i = 0; i < 16; i++)
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printk(" %2u", (udev->toggle[0] & (1 << i)) ? 1 : 0);
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printk("\n");
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dev_dbg(dev, " toggle1(OUT):");
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for (i = 0; i < 16; i++)
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printk(" %2u", (udev->toggle[1] & (1 << i)) ? 1 : 0);
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printk("\n");
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dev_dbg(dev, " epmaxp_in :");
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for (i = 0; i < 16; i++) {
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if (udev->ep_in[i])
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printk(" %2u",
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le16_to_cpu(udev->ep_in[i]->desc.wMaxPacketSize));
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}
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printk("\n");
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dev_dbg(dev, " epmaxp_out :");
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for (i = 0; i < 16; i++) {
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if (udev->ep_out[i])
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printk(" %2u",
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le16_to_cpu(udev->ep_out[i]->desc.wMaxPacketSize));
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}
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printk("\n");
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dev_dbg(dev, "parent %p, bus %p\n", udev->parent, udev->bus);
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dev_dbg(dev, "descriptor %p, config %p, actconfig %p, "
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"rawdescriptors %p\n", &udev->descriptor, udev->config,
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udev->actconfig, udev->rawdescriptors);
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dev_dbg(dev, "have_langid %d, string_langid %d\n",
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udev->have_langid, udev->string_langid);
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dev_dbg(dev, "maxchild %d, children %p\n",
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udev->maxchild, udev->children);
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}
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static void usbip_dump_request_type(__u8 rt)
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{
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switch (rt & USB_RECIP_MASK) {
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case USB_RECIP_DEVICE:
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printk("DEVICE");
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break;
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case USB_RECIP_INTERFACE:
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printk("INTERF");
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break;
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case USB_RECIP_ENDPOINT:
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printk("ENDPOI");
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break;
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case USB_RECIP_OTHER:
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printk("OTHER ");
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break;
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default:
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printk("------");
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}
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}
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static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd)
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{
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if (!cmd) {
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printk(" %s : null pointer\n", __func__);
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return;
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}
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printk(" ");
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printk("bRequestType(%02X) ", cmd->bRequestType);
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printk("bRequest(%02X) " , cmd->bRequest);
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printk("wValue(%04X) ", cmd->wValue);
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printk("wIndex(%04X) ", cmd->wIndex);
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printk("wLength(%04X) ", cmd->wLength);
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printk("\n ");
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if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
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printk("STANDARD ");
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switch (cmd->bRequest) {
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case USB_REQ_GET_STATUS:
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printk("GET_STATUS");
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break;
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case USB_REQ_CLEAR_FEATURE:
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printk("CLEAR_FEAT");
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break;
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case USB_REQ_SET_FEATURE:
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printk("SET_FEAT ");
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break;
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case USB_REQ_SET_ADDRESS:
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printk("SET_ADDRRS");
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break;
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case USB_REQ_GET_DESCRIPTOR:
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printk("GET_DESCRI");
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break;
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case USB_REQ_SET_DESCRIPTOR:
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printk("SET_DESCRI");
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break;
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case USB_REQ_GET_CONFIGURATION:
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printk("GET_CONFIG");
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break;
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case USB_REQ_SET_CONFIGURATION:
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printk("SET_CONFIG");
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break;
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case USB_REQ_GET_INTERFACE:
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printk("GET_INTERF");
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break;
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case USB_REQ_SET_INTERFACE:
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printk("SET_INTERF");
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break;
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case USB_REQ_SYNCH_FRAME:
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printk("SYNC_FRAME");
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break;
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default:
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printk("REQ(%02X) ", cmd->bRequest);
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}
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printk(" ");
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usbip_dump_request_type(cmd->bRequestType);
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} else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS)
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printk("CLASS ");
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else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR)
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printk("VENDOR ");
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else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_RESERVED)
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printk("RESERVED");
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printk("\n");
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}
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void usbip_dump_urb(struct urb *urb)
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{
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struct device *dev;
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if (!urb) {
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printk(KERN_DEBUG KBUILD_MODNAME
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":%s: urb: null pointer!!\n", __func__);
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return;
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}
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if (!urb->dev) {
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printk(KERN_DEBUG KBUILD_MODNAME
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":%s: urb->dev: null pointer!!\n", __func__);
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return;
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}
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dev = &urb->dev->dev;
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dev_dbg(dev, " urb :%p\n", urb);
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dev_dbg(dev, " dev :%p\n", urb->dev);
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usbip_dump_usb_device(urb->dev);
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dev_dbg(dev, " pipe :%08x ", urb->pipe);
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usbip_dump_pipe(urb->pipe);
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dev_dbg(dev, " status :%d\n", urb->status);
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dev_dbg(dev, " transfer_flags :%08X\n", urb->transfer_flags);
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dev_dbg(dev, " transfer_buffer :%p\n", urb->transfer_buffer);
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dev_dbg(dev, " transfer_buffer_length:%d\n", urb->transfer_buffer_length);
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dev_dbg(dev, " actual_length :%d\n", urb->actual_length);
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dev_dbg(dev, " setup_packet :%p\n", urb->setup_packet);
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if (urb->setup_packet && usb_pipetype(urb->pipe) == PIPE_CONTROL)
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usbip_dump_usb_ctrlrequest(
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(struct usb_ctrlrequest *)urb->setup_packet);
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dev_dbg(dev, " start_frame :%d\n", urb->start_frame);
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dev_dbg(dev, " number_of_packets :%d\n", urb->number_of_packets);
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dev_dbg(dev, " interval :%d\n", urb->interval);
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dev_dbg(dev, " error_count :%d\n", urb->error_count);
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dev_dbg(dev, " context :%p\n", urb->context);
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dev_dbg(dev, " complete :%p\n", urb->complete);
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}
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EXPORT_SYMBOL_GPL(usbip_dump_urb);
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void usbip_dump_header(struct usbip_header *pdu)
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{
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udbg("BASE: cmd %u seq %u devid %u dir %u ep %u\n",
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pdu->base.command,
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pdu->base.seqnum,
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pdu->base.devid,
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pdu->base.direction,
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pdu->base.ep);
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switch (pdu->base.command) {
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case USBIP_CMD_SUBMIT:
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udbg("CMD_SUBMIT: x_flags %u x_len %u sf %u #p %u iv %u\n",
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pdu->u.cmd_submit.transfer_flags,
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pdu->u.cmd_submit.transfer_buffer_length,
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pdu->u.cmd_submit.start_frame,
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pdu->u.cmd_submit.number_of_packets,
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pdu->u.cmd_submit.interval);
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break;
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case USBIP_CMD_UNLINK:
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udbg("CMD_UNLINK: seq %u\n", pdu->u.cmd_unlink.seqnum);
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break;
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case USBIP_RET_SUBMIT:
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udbg("RET_SUBMIT: st %d al %u sf %d ec %d\n",
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pdu->u.ret_submit.status,
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pdu->u.ret_submit.actual_length,
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pdu->u.ret_submit.start_frame,
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pdu->u.ret_submit.error_count);
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case USBIP_RET_UNLINK:
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udbg("RET_UNLINK: status %d\n", pdu->u.ret_unlink.status);
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break;
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default:
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/* NOT REACHED */
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udbg("UNKNOWN\n");
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}
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}
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EXPORT_SYMBOL_GPL(usbip_dump_header);
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/*-------------------------------------------------------------------------*/
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/* thread routines */
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int usbip_thread(void *param)
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{
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struct usbip_task *ut = param;
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if (!ut)
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return -EINVAL;
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lock_kernel();
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daemonize(ut->name);
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allow_signal(SIGKILL);
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ut->thread = current;
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unlock_kernel();
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/* srv.rb must wait for rx_thread starting */
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complete(&ut->thread_done);
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/* start of while loop */
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ut->loop_ops(ut);
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/* end of loop */
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ut->thread = NULL;
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complete_and_exit(&ut->thread_done, 0);
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}
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void usbip_start_threads(struct usbip_device *ud)
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{
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/*
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* threads are invoked per one device (per one connection).
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*/
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int retval;
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retval = kernel_thread(usbip_thread, (void *)&ud->tcp_rx, 0);
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if (retval < 0) {
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printk(KERN_ERR "Creating tcp_rx thread for ud %p failed.\n",
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ud);
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return;
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}
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retval = kernel_thread(usbip_thread, (void *)&ud->tcp_tx, 0);
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if (retval < 0) {
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printk(KERN_ERR "Creating tcp_tx thread for ud %p failed.\n",
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ud);
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return;
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}
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/* confirm threads are starting */
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wait_for_completion(&ud->tcp_rx.thread_done);
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wait_for_completion(&ud->tcp_tx.thread_done);
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}
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EXPORT_SYMBOL_GPL(usbip_start_threads);
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void usbip_stop_threads(struct usbip_device *ud)
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{
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/* kill threads related to this sdev, if v.c. exists */
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if (ud->tcp_rx.thread != NULL) {
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send_sig(SIGKILL, ud->tcp_rx.thread, 1);
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wait_for_completion(&ud->tcp_rx.thread_done);
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udbg("rx_thread for ud %p has finished\n", ud);
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}
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if (ud->tcp_tx.thread != NULL) {
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send_sig(SIGKILL, ud->tcp_tx.thread, 1);
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wait_for_completion(&ud->tcp_tx.thread_done);
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udbg("tx_thread for ud %p has finished\n", ud);
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}
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}
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EXPORT_SYMBOL_GPL(usbip_stop_threads);
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|
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void usbip_task_init(struct usbip_task *ut, char *name,
|
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void (*loop_ops)(struct usbip_task *))
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{
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ut->thread = NULL;
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init_completion(&ut->thread_done);
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ut->name = name;
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ut->loop_ops = loop_ops;
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}
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EXPORT_SYMBOL_GPL(usbip_task_init);
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|
|
|
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/*-------------------------------------------------------------------------*/
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/* socket routines */
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|
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/* Send/receive messages over TCP/IP. I refer drivers/block/nbd.c */
|
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int usbip_xmit(int send, struct socket *sock, char *buf,
|
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int size, int msg_flags)
|
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{
|
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int result;
|
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struct msghdr msg;
|
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struct kvec iov;
|
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int total = 0;
|
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|
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/* for blocks of if (dbg_flag_xmit) */
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char *bp = buf;
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int osize = size;
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|
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dbg_xmit("enter\n");
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|
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if (!sock || !buf || !size) {
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printk(KERN_ERR "%s: invalid arg, sock %p buff %p size %d\n",
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__func__, sock, buf, size);
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return -EINVAL;
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}
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|
|
|
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if (dbg_flag_xmit) {
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if (send) {
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if (!in_interrupt())
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printk(KERN_DEBUG "%-10s:", current->comm);
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else
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printk(KERN_DEBUG "interupt :");
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|
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printk("%s: sending... , sock %p, buf %p, "
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"size %d, msg_flags %d\n", __func__,
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sock, buf, size, msg_flags);
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usbip_dump_buffer(buf, size);
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}
|
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}
|
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|
|
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do {
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sock->sk->sk_allocation = GFP_NOIO;
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iov.iov_base = buf;
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iov.iov_len = size;
|
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msg.msg_name = NULL;
|
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msg.msg_namelen = 0;
|
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msg.msg_control = NULL;
|
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msg.msg_controllen = 0;
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msg.msg_namelen = 0;
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msg.msg_flags = msg_flags | MSG_NOSIGNAL;
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|
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if (send)
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result = kernel_sendmsg(sock, &msg, &iov, 1, size);
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else
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result = kernel_recvmsg(sock, &msg, &iov, 1, size,
|
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MSG_WAITALL);
|
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|
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if (result <= 0) {
|
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udbg("usbip_xmit: %s sock %p buf %p size %u ret %d"
|
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" total %d\n",
|
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send ? "send" : "receive", sock, buf,
|
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size, result, total);
|
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goto err;
|
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}
|
|
|
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size -= result;
|
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buf += result;
|
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total += result;
|
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|
|
} while (size > 0);
|
|
|
|
|
|
if (dbg_flag_xmit) {
|
|
if (!send) {
|
|
if (!in_interrupt())
|
|
printk(KERN_DEBUG "%-10s:", current->comm);
|
|
else
|
|
printk(KERN_DEBUG "interupt :");
|
|
|
|
printk("usbip_xmit: receiving....\n");
|
|
usbip_dump_buffer(bp, osize);
|
|
printk("usbip_xmit: received, osize %d ret %d size %d "
|
|
"total %d\n", osize, result, size,
|
|
total);
|
|
}
|
|
|
|
if (send)
|
|
printk("usbip_xmit: send, total %d\n", total);
|
|
}
|
|
|
|
return total;
|
|
|
|
err:
|
|
return result;
|
|
}
|
|
EXPORT_SYMBOL_GPL(usbip_xmit);
|
|
|
|
|
|
/* now a usrland utility should set options. */
|
|
#if 0
|
|
int setquickack(struct socket *socket)
|
|
{
|
|
mm_segment_t oldfs;
|
|
int val = 1;
|
|
int ret;
|
|
|
|
oldfs = get_fs();
|
|
set_fs(get_ds());
|
|
ret = socket->ops->setsockopt(socket, SOL_TCP, TCP_QUICKACK,
|
|
(char __user *) &val, sizeof(ret));
|
|
set_fs(oldfs);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int setnodelay(struct socket *socket)
|
|
{
|
|
mm_segment_t oldfs;
|
|
int val = 1;
|
|
int ret;
|
|
|
|
oldfs = get_fs();
|
|
set_fs(get_ds());
|
|
ret = socket->ops->setsockopt(socket, SOL_TCP, TCP_NODELAY,
|
|
(char __user *) &val, sizeof(ret));
|
|
set_fs(oldfs);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int setkeepalive(struct socket *socket)
|
|
{
|
|
mm_segment_t oldfs;
|
|
int val = 1;
|
|
int ret;
|
|
|
|
oldfs = get_fs();
|
|
set_fs(get_ds());
|
|
ret = socket->ops->setsockopt(socket, SOL_SOCKET, SO_KEEPALIVE,
|
|
(char __user *) &val, sizeof(ret));
|
|
set_fs(oldfs);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void setreuse(struct socket *socket)
|
|
{
|
|
socket->sk->sk_reuse = 1;
|
|
}
|
|
#endif
|
|
|
|
struct socket *sockfd_to_socket(unsigned int sockfd)
|
|
{
|
|
struct socket *socket;
|
|
struct file *file;
|
|
struct inode *inode;
|
|
|
|
file = fget(sockfd);
|
|
if (!file) {
|
|
printk(KERN_ERR "%s: invalid sockfd\n", __func__);
|
|
return NULL;
|
|
}
|
|
|
|
inode = file->f_dentry->d_inode;
|
|
|
|
if (!inode || !S_ISSOCK(inode->i_mode))
|
|
return NULL;
|
|
|
|
socket = SOCKET_I(inode);
|
|
|
|
return socket;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sockfd_to_socket);
|
|
|
|
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
/* pdu routines */
|
|
|
|
/* there may be more cases to tweak the flags. */
|
|
static unsigned int tweak_transfer_flags(unsigned int flags)
|
|
{
|
|
|
|
if (flags & URB_NO_TRANSFER_DMA_MAP)
|
|
/*
|
|
* vhci_hcd does not provide DMA-mapped I/O. The upper
|
|
* driver does not need to set this flag. The remote
|
|
* usbip.ko does not still perform DMA-mapped I/O for
|
|
* DMA-caplable host controllers. So, clear this flag.
|
|
*/
|
|
flags &= ~URB_NO_TRANSFER_DMA_MAP;
|
|
|
|
if (flags & URB_NO_SETUP_DMA_MAP)
|
|
flags &= ~URB_NO_SETUP_DMA_MAP;
|
|
|
|
return flags;
|
|
}
|
|
|
|
static void usbip_pack_cmd_submit(struct usbip_header *pdu, struct urb *urb,
|
|
int pack)
|
|
{
|
|
struct usbip_header_cmd_submit *spdu = &pdu->u.cmd_submit;
|
|
|
|
/*
|
|
* Some members are not still implemented in usbip. I hope this issue
|
|
* will be discussed when usbip is ported to other operating systems.
|
|
*/
|
|
if (pack) {
|
|
/* vhci_tx.c */
|
|
spdu->transfer_flags =
|
|
tweak_transfer_flags(urb->transfer_flags);
|
|
spdu->transfer_buffer_length = urb->transfer_buffer_length;
|
|
spdu->start_frame = urb->start_frame;
|
|
spdu->number_of_packets = urb->number_of_packets;
|
|
spdu->interval = urb->interval;
|
|
} else {
|
|
/* stub_rx.c */
|
|
urb->transfer_flags = spdu->transfer_flags;
|
|
|
|
urb->transfer_buffer_length = spdu->transfer_buffer_length;
|
|
urb->start_frame = spdu->start_frame;
|
|
urb->number_of_packets = spdu->number_of_packets;
|
|
urb->interval = spdu->interval;
|
|
}
|
|
}
|
|
|
|
static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb,
|
|
int pack)
|
|
{
|
|
struct usbip_header_ret_submit *rpdu = &pdu->u.ret_submit;
|
|
|
|
if (pack) {
|
|
/* stub_tx.c */
|
|
|
|
rpdu->status = urb->status;
|
|
rpdu->actual_length = urb->actual_length;
|
|
rpdu->start_frame = urb->start_frame;
|
|
rpdu->error_count = urb->error_count;
|
|
} else {
|
|
/* vhci_rx.c */
|
|
|
|
urb->status = rpdu->status;
|
|
urb->actual_length = rpdu->actual_length;
|
|
urb->start_frame = rpdu->start_frame;
|
|
urb->error_count = rpdu->error_count;
|
|
}
|
|
}
|
|
|
|
|
|
void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
|
|
int pack)
|
|
{
|
|
switch (cmd) {
|
|
case USBIP_CMD_SUBMIT:
|
|
usbip_pack_cmd_submit(pdu, urb, pack);
|
|
break;
|
|
case USBIP_RET_SUBMIT:
|
|
usbip_pack_ret_submit(pdu, urb, pack);
|
|
break;
|
|
default:
|
|
err("unknown command");
|
|
/* NOTREACHED */
|
|
/* BUG(); */
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(usbip_pack_pdu);
|
|
|
|
|
|
static void correct_endian_basic(struct usbip_header_basic *base, int send)
|
|
{
|
|
if (send) {
|
|
base->command = cpu_to_be32(base->command);
|
|
base->seqnum = cpu_to_be32(base->seqnum);
|
|
base->devid = cpu_to_be32(base->devid);
|
|
base->direction = cpu_to_be32(base->direction);
|
|
base->ep = cpu_to_be32(base->ep);
|
|
} else {
|
|
base->command = be32_to_cpu(base->command);
|
|
base->seqnum = be32_to_cpu(base->seqnum);
|
|
base->devid = be32_to_cpu(base->devid);
|
|
base->direction = be32_to_cpu(base->direction);
|
|
base->ep = be32_to_cpu(base->ep);
|
|
}
|
|
}
|
|
|
|
static void correct_endian_cmd_submit(struct usbip_header_cmd_submit *pdu,
|
|
int send)
|
|
{
|
|
if (send) {
|
|
pdu->transfer_flags = cpu_to_be32(pdu->transfer_flags);
|
|
|
|
cpu_to_be32s(&pdu->transfer_buffer_length);
|
|
cpu_to_be32s(&pdu->start_frame);
|
|
cpu_to_be32s(&pdu->number_of_packets);
|
|
cpu_to_be32s(&pdu->interval);
|
|
} else {
|
|
pdu->transfer_flags = be32_to_cpu(pdu->transfer_flags);
|
|
|
|
be32_to_cpus(&pdu->transfer_buffer_length);
|
|
be32_to_cpus(&pdu->start_frame);
|
|
be32_to_cpus(&pdu->number_of_packets);
|
|
be32_to_cpus(&pdu->interval);
|
|
}
|
|
}
|
|
|
|
static void correct_endian_ret_submit(struct usbip_header_ret_submit *pdu,
|
|
int send)
|
|
{
|
|
if (send) {
|
|
cpu_to_be32s(&pdu->status);
|
|
cpu_to_be32s(&pdu->actual_length);
|
|
cpu_to_be32s(&pdu->start_frame);
|
|
cpu_to_be32s(&pdu->error_count);
|
|
} else {
|
|
be32_to_cpus(&pdu->status);
|
|
be32_to_cpus(&pdu->actual_length);
|
|
be32_to_cpus(&pdu->start_frame);
|
|
be32_to_cpus(&pdu->error_count);
|
|
}
|
|
}
|
|
|
|
static void correct_endian_cmd_unlink(struct usbip_header_cmd_unlink *pdu,
|
|
int send)
|
|
{
|
|
if (send)
|
|
pdu->seqnum = cpu_to_be32(pdu->seqnum);
|
|
else
|
|
pdu->seqnum = be32_to_cpu(pdu->seqnum);
|
|
}
|
|
|
|
static void correct_endian_ret_unlink(struct usbip_header_ret_unlink *pdu,
|
|
int send)
|
|
{
|
|
if (send)
|
|
cpu_to_be32s(&pdu->status);
|
|
else
|
|
be32_to_cpus(&pdu->status);
|
|
}
|
|
|
|
void usbip_header_correct_endian(struct usbip_header *pdu, int send)
|
|
{
|
|
__u32 cmd = 0;
|
|
|
|
if (send)
|
|
cmd = pdu->base.command;
|
|
|
|
correct_endian_basic(&pdu->base, send);
|
|
|
|
if (!send)
|
|
cmd = pdu->base.command;
|
|
|
|
switch (cmd) {
|
|
case USBIP_CMD_SUBMIT:
|
|
correct_endian_cmd_submit(&pdu->u.cmd_submit, send);
|
|
break;
|
|
case USBIP_RET_SUBMIT:
|
|
correct_endian_ret_submit(&pdu->u.ret_submit, send);
|
|
break;
|
|
case USBIP_CMD_UNLINK:
|
|
correct_endian_cmd_unlink(&pdu->u.cmd_unlink, send);
|
|
break;
|
|
case USBIP_RET_UNLINK:
|
|
correct_endian_ret_unlink(&pdu->u.ret_unlink, send);
|
|
break;
|
|
default:
|
|
/* NOTREACHED */
|
|
err("unknown command in pdu header: %d", cmd);
|
|
/* BUG(); */
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(usbip_header_correct_endian);
|
|
|
|
static void usbip_iso_pakcet_correct_endian(
|
|
struct usbip_iso_packet_descriptor *iso,
|
|
int send)
|
|
{
|
|
/* does not need all members. but copy all simply. */
|
|
if (send) {
|
|
iso->offset = cpu_to_be32(iso->offset);
|
|
iso->length = cpu_to_be32(iso->length);
|
|
iso->status = cpu_to_be32(iso->status);
|
|
iso->actual_length = cpu_to_be32(iso->actual_length);
|
|
} else {
|
|
iso->offset = be32_to_cpu(iso->offset);
|
|
iso->length = be32_to_cpu(iso->length);
|
|
iso->status = be32_to_cpu(iso->status);
|
|
iso->actual_length = be32_to_cpu(iso->actual_length);
|
|
}
|
|
}
|
|
|
|
static void usbip_pack_iso(struct usbip_iso_packet_descriptor *iso,
|
|
struct usb_iso_packet_descriptor *uiso, int pack)
|
|
{
|
|
if (pack) {
|
|
iso->offset = uiso->offset;
|
|
iso->length = uiso->length;
|
|
iso->status = uiso->status;
|
|
iso->actual_length = uiso->actual_length;
|
|
} else {
|
|
uiso->offset = iso->offset;
|
|
uiso->length = iso->length;
|
|
uiso->status = iso->status;
|
|
uiso->actual_length = iso->actual_length;
|
|
}
|
|
}
|
|
|
|
|
|
/* must free buffer */
|
|
void *usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen)
|
|
{
|
|
void *buff;
|
|
struct usbip_iso_packet_descriptor *iso;
|
|
int np = urb->number_of_packets;
|
|
ssize_t size = np * sizeof(*iso);
|
|
int i;
|
|
|
|
buff = kzalloc(size, GFP_KERNEL);
|
|
if (!buff)
|
|
return NULL;
|
|
|
|
for (i = 0; i < np; i++) {
|
|
iso = buff + (i * sizeof(*iso));
|
|
|
|
usbip_pack_iso(iso, &urb->iso_frame_desc[i], 1);
|
|
usbip_iso_pakcet_correct_endian(iso, 1);
|
|
}
|
|
|
|
*bufflen = size;
|
|
|
|
return buff;
|
|
}
|
|
EXPORT_SYMBOL_GPL(usbip_alloc_iso_desc_pdu);
|
|
|
|
/* some members of urb must be substituted before. */
|
|
int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
|
|
{
|
|
void *buff;
|
|
struct usbip_iso_packet_descriptor *iso;
|
|
int np = urb->number_of_packets;
|
|
int size = np * sizeof(*iso);
|
|
int i;
|
|
int ret;
|
|
|
|
if (!usb_pipeisoc(urb->pipe))
|
|
return 0;
|
|
|
|
/* my Bluetooth dongle gets ISO URBs which are np = 0 */
|
|
if (np == 0) {
|
|
/* uinfo("iso np == 0\n"); */
|
|
/* usbip_dump_urb(urb); */
|
|
return 0;
|
|
}
|
|
|
|
buff = kzalloc(size, GFP_KERNEL);
|
|
if (!buff)
|
|
return -ENOMEM;
|
|
|
|
ret = usbip_xmit(0, ud->tcp_socket, buff, size, 0);
|
|
if (ret != size) {
|
|
dev_err(&urb->dev->dev, "recv iso_frame_descriptor, %d\n",
|
|
ret);
|
|
kfree(buff);
|
|
|
|
if (ud->side == USBIP_STUB)
|
|
usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
|
|
else
|
|
usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
|
|
|
|
return -EPIPE;
|
|
}
|
|
|
|
for (i = 0; i < np; i++) {
|
|
iso = buff + (i * sizeof(*iso));
|
|
|
|
usbip_iso_pakcet_correct_endian(iso, 0);
|
|
usbip_pack_iso(iso, &urb->iso_frame_desc[i], 0);
|
|
}
|
|
|
|
|
|
kfree(buff);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(usbip_recv_iso);
|
|
|
|
|
|
/* some members of urb must be substituted before. */
|
|
int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
|
|
{
|
|
int ret;
|
|
int size;
|
|
|
|
if (ud->side == USBIP_STUB) {
|
|
/* stub_rx.c */
|
|
/* the direction of urb must be OUT. */
|
|
if (usb_pipein(urb->pipe))
|
|
return 0;
|
|
|
|
size = urb->transfer_buffer_length;
|
|
} else {
|
|
/* vhci_rx.c */
|
|
/* the direction of urb must be IN. */
|
|
if (usb_pipeout(urb->pipe))
|
|
return 0;
|
|
|
|
size = urb->actual_length;
|
|
}
|
|
|
|
/* no need to recv xbuff */
|
|
if (!(size > 0))
|
|
return 0;
|
|
|
|
ret = usbip_xmit(0, ud->tcp_socket, (char *)urb->transfer_buffer,
|
|
size, 0);
|
|
if (ret != size) {
|
|
dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret);
|
|
if (ud->side == USBIP_STUB) {
|
|
usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
|
|
} else {
|
|
usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
|
|
return -EPIPE;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(usbip_recv_xbuff);
|
|
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int __init usbip_common_init(void)
|
|
{
|
|
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "" DRIVER_VERSION);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit usbip_common_exit(void)
|
|
{
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
|
|
module_init(usbip_common_init);
|
|
module_exit(usbip_common_exit);
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|