mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
Staging: USB/IP: add common functions needed
This adds the common functions needed by both the host and client side of the USB/IP code. Brian Merrell cleaned up a lot of this code and submitted it for inclusion. Greg also did a lot of cleanup. Signed-off-by: Brian G. Merrell <bgmerrell@novell.com> Cc: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
parent
866b8695d6
commit
05a1f28e87
8 changed files with 1573 additions and 0 deletions
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@ -33,4 +33,6 @@ source "drivers/staging/me4000/Kconfig"
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source "drivers/staging/go7007/Kconfig"
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source "drivers/staging/usbip/Kconfig"
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endif # STAGING
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@ -5,3 +5,4 @@ obj-$(CONFIG_SLICOSS) += slicoss/
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obj-$(CONFIG_SXG) += sxg/
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obj-$(CONFIG_ME4000) += me4000/
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obj-$(CONFIG_VIDEO_GO7007) += go7007/
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obj-$(CONFIG_USB_IP_COMMON) += usbip/
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14
drivers/staging/usbip/Kconfig
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14
drivers/staging/usbip/Kconfig
Normal file
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@ -0,0 +1,14 @@
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config USB_IP_COMMON
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tristate "USB IP support (EXPERIMENTAL)"
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depends on USB && EXPERIMENTAL
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default N
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---help---
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This enables pushing USB packets over IP to allow remote
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machines access to USB devices directly. For more details,
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and links to the userspace utility programs to let this work
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properly, see http://usbip.naist.jp/
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To compile this driver as a module, choose M here: the
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module will be called usbip_common_mod.
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If unsure, say N.
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6
drivers/staging/usbip/Makefile
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6
drivers/staging/usbip/Makefile
Normal file
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@ -0,0 +1,6 @@
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obj-$(CONFIG_USB_IP_COMMON) += usbip_common_mod.o
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usbip_common_mod-objs := usbip_common.o usbip_event.o
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ifeq ($(CONFIG_USB_DEBUG),y)
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EXTRA_CFLAGS += -DDEBUG
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endif
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6
drivers/staging/usbip/README
Normal file
6
drivers/staging/usbip/README
Normal file
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@ -0,0 +1,6 @@
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TODO:
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- more discussion about the protocol
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- testing
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- review of the userspace interface
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Please send patches for this code to Greg Kroah-Hartman <greg@kroah.com>
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997
drivers/staging/usbip/usbip_common.c
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997
drivers/staging/usbip/usbip_common.c
Normal file
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@ -0,0 +1,997 @@
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/*
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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", __FUNCTION__);
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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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|
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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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|
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/* srv.rb must wait for rx_thread starting */
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complete(&ut->thread_done);
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|
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/* start of while loop */
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ut->loop_ops(ut);
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|
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/* end of loop */
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ut->thread = NULL;
|
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|
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complete_and_exit(&ut->thread_done, 0);
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}
|
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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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kernel_thread(usbip_thread, (void *)&ud->tcp_rx, 0);
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kernel_thread(usbip_thread, (void *)&ud->tcp_tx, 0);
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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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|
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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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|
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if (ud->tcp_tx.thread != NULL) {
|
||||
send_sig(SIGKILL, ud->tcp_tx.thread, 1);
|
||||
wait_for_completion(&ud->tcp_tx.thread_done);
|
||||
udbg("tx_thread for ud %p has finished\n", ud);
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(usbip_stop_threads);
|
||||
|
||||
void usbip_task_init(struct usbip_task *ut, char *name,
|
||||
void (*loop_ops)(struct usbip_task *))
|
||||
{
|
||||
ut->thread = NULL;
|
||||
init_completion(&ut->thread_done);
|
||||
ut->name = name;
|
||||
ut->loop_ops = loop_ops;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(usbip_task_init);
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
/* socket routines */
|
||||
|
||||
/* Send/receive messages over TCP/IP. I refer drivers/block/nbd.c */
|
||||
int usbip_xmit(int send, struct socket *sock, char *buf,
|
||||
int size, int msg_flags)
|
||||
{
|
||||
int result;
|
||||
struct msghdr msg;
|
||||
struct kvec iov;
|
||||
int total = 0;
|
||||
|
||||
/* for blocks of if (dbg_flag_xmit) */
|
||||
char *bp = buf;
|
||||
int osize = size;
|
||||
|
||||
dbg_xmit("enter\n");
|
||||
|
||||
if (!sock || !buf || !size) {
|
||||
printk(KERN_ERR "%s: invalid arg, sock %p buff %p size %d\n",
|
||||
__func__, sock, buf, size);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
|
||||
if (dbg_flag_xmit) {
|
||||
if (send) {
|
||||
if (!in_interrupt())
|
||||
printk(KERN_DEBUG "%-10s:", current->comm);
|
||||
else
|
||||
printk(KERN_DEBUG "interupt :");
|
||||
|
||||
printk("%s: sending... , sock %p, buf %p, "
|
||||
"size %d, msg_flags %d\n", __func__,
|
||||
sock, buf, size, msg_flags);
|
||||
usbip_dump_buffer(buf, size);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
do {
|
||||
sock->sk->sk_allocation = GFP_NOIO;
|
||||
iov.iov_base = buf;
|
||||
iov.iov_len = size;
|
||||
msg.msg_name = NULL;
|
||||
msg.msg_namelen = 0;
|
||||
msg.msg_control = NULL;
|
||||
msg.msg_controllen = 0;
|
||||
msg.msg_namelen = 0;
|
||||
msg.msg_flags = msg_flags | MSG_NOSIGNAL;
|
||||
|
||||
if (send)
|
||||
result = kernel_sendmsg(sock, &msg, &iov, 1, size);
|
||||
else
|
||||
result = kernel_recvmsg(sock, &msg, &iov, 1, size,
|
||||
MSG_WAITALL);
|
||||
|
||||
if (result <= 0) {
|
||||
udbg("usbip_xmit: %s sock %p buf %p size %u ret %d"
|
||||
" total %d\n",
|
||||
send ? "send" : "receive", sock, buf,
|
||||
size, result, total);
|
||||
goto err;
|
||||
}
|
||||
|
||||
size -= result;
|
||||
buf += result;
|
||||
total += result;
|
||||
|
||||
} 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");
|
406
drivers/staging/usbip/usbip_common.h
Normal file
406
drivers/staging/usbip/usbip_common.h
Normal file
|
@ -0,0 +1,406 @@
|
|||
/*
|
||||
* Copyright (C) 2003-2008 Takahiro Hirofuchi
|
||||
*
|
||||
* This is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
|
||||
* USA.
|
||||
*/
|
||||
|
||||
#ifndef __VHCI_COMMON_H
|
||||
#define __VHCI_COMMON_H
|
||||
|
||||
|
||||
#include <linux/version.h>
|
||||
#include <linux/usb.h>
|
||||
#include <asm/byteorder.h>
|
||||
#include <net/sock.h>
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* define macros to print messages
|
||||
*/
|
||||
|
||||
/**
|
||||
* udbg - print debug messages if CONFIG_USB_DEBUG is defined
|
||||
* @fmt:
|
||||
* @args:
|
||||
*/
|
||||
|
||||
#ifdef CONFIG_USB_DEBUG
|
||||
|
||||
#define udbg(fmt, args...) \
|
||||
do { \
|
||||
printk(KERN_DEBUG "%-10s:(%s,%d) %s: " fmt, \
|
||||
(in_interrupt() ? "interrupt" : (current)->comm),\
|
||||
__FILE__, __LINE__, __func__, ##args); \
|
||||
} while (0)
|
||||
|
||||
#else /* CONFIG_USB_DEBUG */
|
||||
|
||||
#define udbg(fmt, args...) do { } while (0)
|
||||
|
||||
#endif /* CONFIG_USB_DEBUG */
|
||||
|
||||
|
||||
enum {
|
||||
usbip_debug_xmit = (1 << 0),
|
||||
usbip_debug_sysfs = (1 << 1),
|
||||
usbip_debug_urb = (1 << 2),
|
||||
usbip_debug_eh = (1 << 3),
|
||||
|
||||
usbip_debug_stub_cmp = (1 << 8),
|
||||
usbip_debug_stub_dev = (1 << 9),
|
||||
usbip_debug_stub_rx = (1 << 10),
|
||||
usbip_debug_stub_tx = (1 << 11),
|
||||
|
||||
usbip_debug_vhci_rh = (1 << 8),
|
||||
usbip_debug_vhci_hc = (1 << 9),
|
||||
usbip_debug_vhci_rx = (1 << 10),
|
||||
usbip_debug_vhci_tx = (1 << 11),
|
||||
usbip_debug_vhci_sysfs = (1 << 12)
|
||||
};
|
||||
|
||||
#define dbg_flag_xmit (usbip_debug_flag & usbip_debug_xmit)
|
||||
#define dbg_flag_vhci_rh (usbip_debug_flag & usbip_debug_vhci_rh)
|
||||
#define dbg_flag_vhci_hc (usbip_debug_flag & usbip_debug_vhci_hc)
|
||||
#define dbg_flag_vhci_rx (usbip_debug_flag & usbip_debug_vhci_rx)
|
||||
#define dbg_flag_vhci_tx (usbip_debug_flag & usbip_debug_vhci_tx)
|
||||
#define dbg_flag_vhci_sysfs (usbip_debug_flag & usbip_debug_vhci_sysfs)
|
||||
#define dbg_flag_stub_rx (usbip_debug_flag & usbip_debug_stub_rx)
|
||||
#define dbg_flag_stub_tx (usbip_debug_flag & usbip_debug_stub_tx)
|
||||
|
||||
extern unsigned long usbip_debug_flag;
|
||||
extern struct device_attribute dev_attr_usbip_debug;
|
||||
|
||||
#define dbg_with_flag(flag, fmt, args...) \
|
||||
do { \
|
||||
if (flag & usbip_debug_flag) \
|
||||
udbg(fmt , ##args); \
|
||||
} while (0)
|
||||
|
||||
#define dbg_sysfs(fmt, args...) \
|
||||
dbg_with_flag(usbip_debug_sysfs, fmt , ##args)
|
||||
#define dbg_xmit(fmt, args...) \
|
||||
dbg_with_flag(usbip_debug_xmit, fmt , ##args)
|
||||
#define dbg_urb(fmt, args...) \
|
||||
dbg_with_flag(usbip_debug_urb, fmt , ##args)
|
||||
#define dbg_eh(fmt, args...) \
|
||||
dbg_with_flag(usbip_debug_eh, fmt , ##args)
|
||||
|
||||
#define dbg_vhci_rh(fmt, args...) \
|
||||
dbg_with_flag(usbip_debug_vhci_rh, fmt , ##args)
|
||||
#define dbg_vhci_hc(fmt, args...) \
|
||||
dbg_with_flag(usbip_debug_vhci_hc, fmt , ##args)
|
||||
#define dbg_vhci_rx(fmt, args...) \
|
||||
dbg_with_flag(usbip_debug_vhci_rx, fmt , ##args)
|
||||
#define dbg_vhci_tx(fmt, args...) \
|
||||
dbg_with_flag(usbip_debug_vhci_tx, fmt , ##args)
|
||||
#define dbg_vhci_sysfs(fmt, args...) \
|
||||
dbg_with_flag(usbip_debug_vhci_sysfs, fmt , ##args)
|
||||
|
||||
#define dbg_stub_cmp(fmt, args...) \
|
||||
dbg_with_flag(usbip_debug_stub_cmp, fmt , ##args)
|
||||
#define dbg_stub_rx(fmt, args...) \
|
||||
dbg_with_flag(usbip_debug_stub_rx, fmt , ##args)
|
||||
#define dbg_stub_tx(fmt, args...) \
|
||||
dbg_with_flag(usbip_debug_stub_tx, fmt , ##args)
|
||||
|
||||
|
||||
/**
|
||||
* uerr - print error messages
|
||||
* @fmt:
|
||||
* @args:
|
||||
*/
|
||||
#define uerr(fmt, args...) \
|
||||
do { \
|
||||
printk(KERN_ERR "%-10s: ***ERROR*** (%s,%d) %s: " fmt, \
|
||||
(in_interrupt() ? "interrupt" : (current)->comm),\
|
||||
__FILE__, __LINE__, __func__, ##args); \
|
||||
} while (0)
|
||||
|
||||
/**
|
||||
* uinfo - print information messages
|
||||
* @fmt:
|
||||
* @args:
|
||||
*/
|
||||
#define uinfo(fmt, args...) \
|
||||
do { \
|
||||
printk(KERN_INFO "usbip: " fmt , ## args); \
|
||||
} while (0)
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* USB/IP request headers.
|
||||
* Currently, we define 4 request types:
|
||||
*
|
||||
* - CMD_SUBMIT transfers a USB request, corresponding to usb_submit_urb().
|
||||
* (client to server)
|
||||
* - RET_RETURN transfers the result of CMD_SUBMIT.
|
||||
* (server to client)
|
||||
* - CMD_UNLINK transfers an unlink request of a pending USB request.
|
||||
* (client to server)
|
||||
* - RET_UNLINK transfers the result of CMD_UNLINK.
|
||||
* (server to client)
|
||||
*
|
||||
* Note: The below request formats are based on the USB subsystem of Linux. Its
|
||||
* details will be defined when other implementations come.
|
||||
*
|
||||
*
|
||||
*/
|
||||
|
||||
/*
|
||||
* A basic header followed by other additional headers.
|
||||
*/
|
||||
struct usbip_header_basic {
|
||||
#define USBIP_CMD_SUBMIT 0x0001
|
||||
#define USBIP_CMD_UNLINK 0x0002
|
||||
#define USBIP_RET_SUBMIT 0x0003
|
||||
#define USBIP_RET_UNLINK 0x0004
|
||||
__u32 command;
|
||||
|
||||
/* sequencial number which identifies requests.
|
||||
* incremented per connections */
|
||||
__u32 seqnum;
|
||||
|
||||
/* devid is used to specify a remote USB device uniquely instead
|
||||
* of busnum and devnum in Linux. In the case of Linux stub_driver,
|
||||
* this value is ((busnum << 16) | devnum) */
|
||||
__u32 devid;
|
||||
|
||||
#define USBIP_DIR_OUT 0
|
||||
#define USBIP_DIR_IN 1
|
||||
__u32 direction;
|
||||
__u32 ep; /* endpoint number */
|
||||
} __attribute__ ((packed));
|
||||
|
||||
/*
|
||||
* An additional header for a CMD_SUBMIT packet.
|
||||
*/
|
||||
struct usbip_header_cmd_submit {
|
||||
/* these values are basically the same as in a URB. */
|
||||
|
||||
/* the same in a URB. */
|
||||
__u32 transfer_flags;
|
||||
|
||||
/* set the following data size (out),
|
||||
* or expected reading data size (in) */
|
||||
__s32 transfer_buffer_length;
|
||||
|
||||
/* it is difficult for usbip to sync frames (reserved only?) */
|
||||
__s32 start_frame;
|
||||
|
||||
/* the number of iso descriptors that follows this header */
|
||||
__s32 number_of_packets;
|
||||
|
||||
/* the maximum time within which this request works in a host
|
||||
* controller of a server side */
|
||||
__s32 interval;
|
||||
|
||||
/* set setup packet data for a CTRL request */
|
||||
unsigned char setup[8];
|
||||
} __attribute__ ((packed));
|
||||
|
||||
/*
|
||||
* An additional header for a RET_SUBMIT packet.
|
||||
*/
|
||||
struct usbip_header_ret_submit {
|
||||
__s32 status;
|
||||
__s32 actual_length; /* returned data length */
|
||||
__s32 start_frame; /* ISO and INT */
|
||||
__s32 number_of_packets; /* ISO only */
|
||||
__s32 error_count; /* ISO only */
|
||||
} __attribute__ ((packed));
|
||||
|
||||
/*
|
||||
* An additional header for a CMD_UNLINK packet.
|
||||
*/
|
||||
struct usbip_header_cmd_unlink {
|
||||
__u32 seqnum; /* URB's seqnum which will be unlinked */
|
||||
} __attribute__ ((packed));
|
||||
|
||||
|
||||
/*
|
||||
* An additional header for a RET_UNLINK packet.
|
||||
*/
|
||||
struct usbip_header_ret_unlink {
|
||||
__s32 status;
|
||||
} __attribute__ ((packed));
|
||||
|
||||
|
||||
/* the same as usb_iso_packet_descriptor but packed for pdu */
|
||||
struct usbip_iso_packet_descriptor {
|
||||
__u32 offset;
|
||||
__u32 length; /* expected length */
|
||||
__u32 actual_length;
|
||||
__u32 status;
|
||||
} __attribute__ ((packed));
|
||||
|
||||
|
||||
/*
|
||||
* All usbip packets use a common header to keep code simple.
|
||||
*/
|
||||
struct usbip_header {
|
||||
struct usbip_header_basic base;
|
||||
|
||||
union {
|
||||
struct usbip_header_cmd_submit cmd_submit;
|
||||
struct usbip_header_ret_submit ret_submit;
|
||||
struct usbip_header_cmd_unlink cmd_unlink;
|
||||
struct usbip_header_ret_unlink ret_unlink;
|
||||
} u;
|
||||
} __attribute__ ((packed));
|
||||
|
||||
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
|
||||
int usbip_xmit(int, struct socket *, char *, int, int);
|
||||
int usbip_sendmsg(struct socket *, struct msghdr *, int);
|
||||
|
||||
|
||||
static inline int interface_to_busnum(struct usb_interface *interface)
|
||||
{
|
||||
struct usb_device *udev = interface_to_usbdev(interface);
|
||||
return udev->bus->busnum;
|
||||
}
|
||||
|
||||
static inline int interface_to_devnum(struct usb_interface *interface)
|
||||
{
|
||||
struct usb_device *udev = interface_to_usbdev(interface);
|
||||
return udev->devnum;
|
||||
}
|
||||
|
||||
static inline int interface_to_infnum(struct usb_interface *interface)
|
||||
{
|
||||
return interface->cur_altsetting->desc.bInterfaceNumber;
|
||||
}
|
||||
|
||||
#if 0
|
||||
int setnodelay(struct socket *);
|
||||
int setquickack(struct socket *);
|
||||
int setkeepalive(struct socket *socket);
|
||||
void setreuse(struct socket *);
|
||||
#endif
|
||||
|
||||
struct socket *sockfd_to_socket(unsigned int);
|
||||
int set_sockaddr(struct socket *socket, struct sockaddr_storage *ss);
|
||||
|
||||
void usbip_dump_urb(struct urb *purb);
|
||||
void usbip_dump_header(struct usbip_header *pdu);
|
||||
|
||||
|
||||
struct usbip_device;
|
||||
|
||||
struct usbip_task {
|
||||
struct task_struct *thread;
|
||||
struct completion thread_done;
|
||||
char *name;
|
||||
void (*loop_ops)(struct usbip_task *);
|
||||
};
|
||||
|
||||
enum usbip_side {
|
||||
USBIP_VHCI,
|
||||
USBIP_STUB,
|
||||
};
|
||||
|
||||
enum usbip_status {
|
||||
/* sdev is available. */
|
||||
SDEV_ST_AVAILABLE = 0x01,
|
||||
/* sdev is now used. */
|
||||
SDEV_ST_USED,
|
||||
/* sdev is unusable because of a fatal error. */
|
||||
SDEV_ST_ERROR,
|
||||
|
||||
/* vdev does not connect a remote device. */
|
||||
VDEV_ST_NULL,
|
||||
/* vdev is used, but the USB address is not assigned yet */
|
||||
VDEV_ST_NOTASSIGNED,
|
||||
VDEV_ST_USED,
|
||||
VDEV_ST_ERROR
|
||||
};
|
||||
|
||||
/* a common structure for stub_device and vhci_device */
|
||||
struct usbip_device {
|
||||
enum usbip_side side;
|
||||
|
||||
enum usbip_status status;
|
||||
|
||||
/* lock for status */
|
||||
spinlock_t lock;
|
||||
|
||||
struct socket *tcp_socket;
|
||||
|
||||
struct usbip_task tcp_rx;
|
||||
struct usbip_task tcp_tx;
|
||||
|
||||
/* event handler */
|
||||
#define USBIP_EH_SHUTDOWN (1 << 0)
|
||||
#define USBIP_EH_BYE (1 << 1)
|
||||
#define USBIP_EH_RESET (1 << 2)
|
||||
#define USBIP_EH_UNUSABLE (1 << 3)
|
||||
|
||||
#define SDEV_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_RESET | USBIP_EH_BYE)
|
||||
#define SDEV_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
|
||||
#define SDEV_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
|
||||
#define SDEV_EVENT_ERROR_SUBMIT (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
|
||||
#define SDEV_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
|
||||
|
||||
#define VDEV_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_BYE)
|
||||
#define VDEV_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
|
||||
#define VDEV_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
|
||||
#define VDEV_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
|
||||
|
||||
unsigned long event;
|
||||
struct usbip_task eh;
|
||||
wait_queue_head_t eh_waitq;
|
||||
|
||||
struct eh_ops {
|
||||
void (*shutdown)(struct usbip_device *);
|
||||
void (*reset)(struct usbip_device *);
|
||||
void (*unusable)(struct usbip_device *);
|
||||
} eh_ops;
|
||||
};
|
||||
|
||||
|
||||
void usbip_task_init(struct usbip_task *ut, char *,
|
||||
void (*loop_ops)(struct usbip_task *));
|
||||
|
||||
void usbip_start_threads(struct usbip_device *ud);
|
||||
void usbip_stop_threads(struct usbip_device *ud);
|
||||
int usbip_thread(void *param);
|
||||
|
||||
void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
|
||||
int pack);
|
||||
|
||||
void usbip_header_correct_endian(struct usbip_header *pdu, int send);
|
||||
/* some members of urb must be substituted before. */
|
||||
int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb);
|
||||
/* some members of urb must be substituted before. */
|
||||
int usbip_recv_iso(struct usbip_device *ud, struct urb *urb);
|
||||
void *usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen);
|
||||
|
||||
|
||||
/* usbip_event.c */
|
||||
void usbip_start_eh(struct usbip_device *ud);
|
||||
void usbip_stop_eh(struct usbip_device *ud);
|
||||
void usbip_event_add(struct usbip_device *ud, unsigned long event);
|
||||
int usbip_event_happend(struct usbip_device *ud);
|
||||
|
||||
|
||||
#endif
|
141
drivers/staging/usbip/usbip_event.c
Normal file
141
drivers/staging/usbip/usbip_event.c
Normal file
|
@ -0,0 +1,141 @@
|
|||
/*
|
||||
* Copyright (C) 2003-2008 Takahiro Hirofuchi
|
||||
*
|
||||
* This is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
|
||||
* USA.
|
||||
*/
|
||||
|
||||
#include "usbip_common.h"
|
||||
|
||||
static int event_handler(struct usbip_device *ud)
|
||||
{
|
||||
dbg_eh("enter\n");
|
||||
|
||||
/*
|
||||
* Events are handled by only this thread.
|
||||
*/
|
||||
while (usbip_event_happend(ud)) {
|
||||
dbg_eh("pending event %lx\n", ud->event);
|
||||
|
||||
/*
|
||||
* NOTE: shutdown must come first.
|
||||
* Shutdown the device.
|
||||
*/
|
||||
if (ud->event & USBIP_EH_SHUTDOWN) {
|
||||
ud->eh_ops.shutdown(ud);
|
||||
|
||||
ud->event &= ~USBIP_EH_SHUTDOWN;
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
/* Stop the error handler. */
|
||||
if (ud->event & USBIP_EH_BYE)
|
||||
return -1;
|
||||
|
||||
/* Reset the device. */
|
||||
if (ud->event & USBIP_EH_RESET) {
|
||||
ud->eh_ops.reset(ud);
|
||||
|
||||
ud->event &= ~USBIP_EH_RESET;
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
/* Mark the device as unusable. */
|
||||
if (ud->event & USBIP_EH_UNUSABLE) {
|
||||
ud->eh_ops.unusable(ud);
|
||||
|
||||
ud->event &= ~USBIP_EH_UNUSABLE;
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
/* NOTREACHED */
|
||||
printk(KERN_ERR "%s: unknown event\n", __func__);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void event_handler_loop(struct usbip_task *ut)
|
||||
{
|
||||
struct usbip_device *ud = container_of(ut, struct usbip_device, eh);
|
||||
|
||||
while (1) {
|
||||
if (signal_pending(current)) {
|
||||
dbg_eh("signal catched!\n");
|
||||
break;
|
||||
}
|
||||
|
||||
if (event_handler(ud) < 0)
|
||||
break;
|
||||
|
||||
wait_event_interruptible(ud->eh_waitq, usbip_event_happend(ud));
|
||||
dbg_eh("wakeup\n");
|
||||
}
|
||||
}
|
||||
|
||||
void usbip_start_eh(struct usbip_device *ud)
|
||||
{
|
||||
struct usbip_task *eh = &ud->eh;
|
||||
|
||||
init_waitqueue_head(&ud->eh_waitq);
|
||||
ud->event = 0;
|
||||
|
||||
usbip_task_init(eh, "usbip_eh", event_handler_loop);
|
||||
|
||||
kernel_thread(usbip_thread, (void *)eh, 0);
|
||||
|
||||
wait_for_completion(&eh->thread_done);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(usbip_start_eh);
|
||||
|
||||
void usbip_stop_eh(struct usbip_device *ud)
|
||||
{
|
||||
struct usbip_task *eh = &ud->eh;
|
||||
|
||||
wait_for_completion(&eh->thread_done);
|
||||
dbg_eh("usbip_eh has finished\n");
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(usbip_stop_eh);
|
||||
|
||||
void usbip_event_add(struct usbip_device *ud, unsigned long event)
|
||||
{
|
||||
spin_lock(&ud->lock);
|
||||
|
||||
ud->event |= event;
|
||||
|
||||
wake_up(&ud->eh_waitq);
|
||||
|
||||
spin_unlock(&ud->lock);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(usbip_event_add);
|
||||
|
||||
int usbip_event_happend(struct usbip_device *ud)
|
||||
{
|
||||
int happend = 0;
|
||||
|
||||
spin_lock(&ud->lock);
|
||||
|
||||
if (ud->event != 0)
|
||||
happend = 1;
|
||||
|
||||
spin_unlock(&ud->lock);
|
||||
|
||||
return happend;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(usbip_event_happend);
|
Loading…
Reference in a new issue