/*
* 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 <linux/kernel.h>
#include <linux/smp_lock.h>
#include <linux/file.h>
#include <linux/tcp.h>
#include <linux/in.h>
#include <linux/kthread.h>
#include "usbip_common.h"
/* version information */
#define DRIVER_VERSION "1.0"
#define DRIVER_AUTHOR "Takahiro Hirofuchi <hirofuchi _at_ users.sourceforge.net>"
#define DRIVER_DESC "usbip common driver"
/*-------------------------------------------------------------------------*/
/* debug routines */
#ifdef CONFIG_USB_DEBUG
unsigned long usbip_debug_flag = 0xffffffff;
#else
unsigned long usbip_debug_flag;
#endif
EXPORT_SYMBOL_GPL(usbip_debug_flag);
/* FIXME */
struct device_attribute dev_attr_usbip_debug;
EXPORT_SYMBOL_GPL(dev_attr_usbip_debug);
static ssize_t show_flag(struct device *dev, struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%lx\n", usbip_debug_flag);
}
static ssize_t store_flag(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long flag;
sscanf(buf, "%lx", &flag);
usbip_debug_flag = flag;
return count;
}
DEVICE_ATTR(usbip_debug, (S_IRUGO | S_IWUSR), show_flag, store_flag);
static void usbip_dump_buffer(char *buff, int bufflen)
{
int i;
if (bufflen > 128) {
for (i = 0; i < 128; i++) {
if (i%24 == 0)
printk(KERN_DEBUG " ");
printk(KERN_DEBUG "%02x ", (unsigned char) buff[i]);
if (i%4 == 3)
printk(KERN_DEBUG "| ");
if (i%24 == 23)
printk(KERN_DEBUG "\n");
}
printk(KERN_DEBUG "... (%d byte)\n", bufflen);
return;
}
for (i = 0; i < bufflen; i++) {
if (i%24 == 0)
printk(KERN_DEBUG " ");
printk(KERN_DEBUG "%02x ", (unsigned char) buff[i]);
if (i%4 == 3)
printk(KERN_DEBUG "| ");
if (i%24 == 23)
printk(KERN_DEBUG "\n");
}
printk(KERN_DEBUG "\n");
}
static void usbip_dump_pipe(unsigned int p)
{
unsigned char type = usb_pipetype(p);
unsigned char ep = usb_pipeendpoint(p);
unsigned char dev = usb_pipedevice(p);
unsigned char dir = usb_pipein(p);
printk(KERN_DEBUG "dev(%d) ", dev);
printk(KERN_DEBUG "ep(%d) ", ep);
printk(KERN_DEBUG "%s ", dir ? "IN" : "OUT");
switch (type) {
case PIPE_ISOCHRONOUS:
printk(KERN_DEBUG "%s ", "ISO");
break;
case PIPE_INTERRUPT:
printk(KERN_DEBUG "%s ", "INT");
break;
case PIPE_CONTROL:
printk(KERN_DEBUG "%s ", "CTL");
break;
case PIPE_BULK:
printk(KERN_DEBUG "%s ", "BLK");
break;
default:
printk(KERN_DEBUG "ERR");
}
printk(KERN_DEBUG "\n");
}
static void usbip_dump_usb_device(struct usb_device *udev)
{
struct device *dev = &udev->dev;
int i;
dev_dbg(dev, " devnum(%d) devpath(%s)",
udev->devnum, udev->devpath);
switch (udev->speed) {
case USB_SPEED_HIGH:
printk(KERN_DEBUG " SPD_HIGH");
break;
case USB_SPEED_FULL:
printk(KERN_DEBUG " SPD_FULL");
break;
case USB_SPEED_LOW:
printk(KERN_DEBUG " SPD_LOW");
break;
case USB_SPEED_UNKNOWN:
printk(KERN_DEBUG " SPD_UNKNOWN");
break;
default:
printk(KERN_DEBUG " SPD_ERROR");
}
printk(KERN_DEBUG " tt %p, ttport %d", udev->tt, udev->ttport);
printk(KERN_DEBUG "\n");
dev_dbg(dev, " ");
for (i = 0; i < 16; i++)
printk(KERN_DEBUG " %2u", i);
printk(KERN_DEBUG "\n");
dev_dbg(dev, " toggle0(IN) :");
for (i = 0; i < 16; i++)
printk(KERN_DEBUG " %2u", (udev->toggle[0] & (1 << i)) ? 1 : 0);
printk(KERN_DEBUG "\n");
dev_dbg(dev, " toggle1(OUT):");
for (i = 0; i < 16; i++)
printk(KERN_DEBUG " %2u", (udev->toggle[1] & (1 << i)) ? 1 : 0);
printk(KERN_DEBUG "\n");
dev_dbg(dev, " epmaxp_in :");
for (i = 0; i < 16; i++) {
if (udev->ep_in[i])
printk(KERN_DEBUG " %2u",
le16_to_cpu(udev->ep_in[i]->desc.wMaxPacketSize));
}
printk(KERN_DEBUG "\n");
dev_dbg(dev, " epmaxp_out :");
for (i = 0; i < 16; i++) {
if (udev->ep_out[i])
printk(KERN_DEBUG " %2u",
le16_to_cpu(udev->ep_out[i]->desc.wMaxPacketSize));
}
printk(KERN_DEBUG "\n");
dev_dbg(dev, "parent %p, bus %p\n", udev->parent, udev->bus);
dev_dbg(dev, "descriptor %p, config %p, actconfig %p, "
"rawdescriptors %p\n", &udev->descriptor, udev->config,
udev->actconfig, udev->rawdescriptors);
dev_dbg(dev, "have_langid %d, string_langid %d\n",
udev->have_langid, udev->string_langid);
dev_dbg(dev, "maxchild %d, children %p\n",
udev->maxchild, udev->children);
}
static void usbip_dump_request_type(__u8 rt)
{
switch (rt & USB_RECIP_MASK) {
case USB_RECIP_DEVICE:
printk(KERN_DEBUG "DEVICE");
break;
case USB_RECIP_INTERFACE:
printk(KERN_DEBUG "INTERF");
break;
case USB_RECIP_ENDPOINT:
printk(KERN_DEBUG "ENDPOI");
break;
case USB_RECIP_OTHER:
printk(KERN_DEBUG "OTHER ");
break;
default:
printk(KERN_DEBUG "------");
}
}
static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd)
{
if (!cmd) {
printk(KERN_DEBUG " %s : null pointer\n", __func__);
return;
}
printk(KERN_DEBUG " ");
printk(KERN_DEBUG "bRequestType(%02X) ", cmd->bRequestType);
printk(KERN_DEBUG "bRequest(%02X) " , cmd->bRequest);
printk(KERN_DEBUG "wValue(%04X) ", cmd->wValue);
printk(KERN_DEBUG "wIndex(%04X) ", cmd->wIndex);
printk(KERN_DEBUG "wLength(%04X) ", cmd->wLength);
printk(KERN_DEBUG "\n ");
if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
printk(KERN_DEBUG "STANDARD ");
switch (cmd->bRequest) {
case USB_REQ_GET_STATUS:
printk(KERN_DEBUG "GET_STATUS");
break;
case USB_REQ_CLEAR_FEATURE:
printk(KERN_DEBUG "CLEAR_FEAT");
break;
case USB_REQ_SET_FEATURE:
printk(KERN_DEBUG "SET_FEAT ");
break;
case USB_REQ_SET_ADDRESS:
printk(KERN_DEBUG "SET_ADDRRS");
break;
case USB_REQ_GET_DESCRIPTOR:
printk(KERN_DEBUG "GET_DESCRI");
break;
case USB_REQ_SET_DESCRIPTOR:
printk(KERN_DEBUG "SET_DESCRI");
break;
case USB_REQ_GET_CONFIGURATION:
printk(KERN_DEBUG "GET_CONFIG");
break;
case USB_REQ_SET_CONFIGURATION:
printk(KERN_DEBUG "SET_CONFIG");
break;
case USB_REQ_GET_INTERFACE:
printk(KERN_DEBUG "GET_INTERF");
break;
case USB_REQ_SET_INTERFACE:
printk(KERN_DEBUG "SET_INTERF");
break;
case USB_REQ_SYNCH_FRAME:
printk(KERN_DEBUG "SYNC_FRAME");
break;
default:
printk(KERN_DEBUG "REQ(%02X) ", cmd->bRequest);
}
printk(KERN_DEBUG " ");
usbip_dump_request_type(cmd->bRequestType);
} else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS)
printk(KERN_DEBUG "CLASS ");
else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR)
printk(KERN_DEBUG "VENDOR ");
else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_RESERVED)
printk(KERN_DEBUG "RESERVED");
printk(KERN_DEBUG "\n");
}
void usbip_dump_urb(struct urb *urb)
{
struct device *dev;
if (!urb) {
printk(KERN_DEBUG KBUILD_MODNAME
":%s: urb: null pointer!!\n", __func__);
return;
}
if (!urb->dev) {
printk(KERN_DEBUG KBUILD_MODNAME
":%s: urb->dev: null pointer!!\n", __func__);
return;
}
dev = &urb->dev->dev;
dev_dbg(dev, " urb :%p\n", urb);
dev_dbg(dev, " dev :%p\n", urb->dev);
usbip_dump_usb_device(urb->dev);
dev_dbg(dev, " pipe :%08x ", urb->pipe);
usbip_dump_pipe(urb->pipe);
dev_dbg(dev, " status :%d\n", urb->status);
dev_dbg(dev, " transfer_flags :%08X\n", urb->transfer_flags);
dev_dbg(dev, " transfer_buffer :%p\n", urb->transfer_buffer);
dev_dbg(dev, " transfer_buffer_length:%d\n",
urb->transfer_buffer_length);
dev_dbg(dev, " actual_length :%d\n", urb->actual_length);
dev_dbg(dev, " setup_packet :%p\n", urb->setup_packet);
if (urb->setup_packet && usb_pipetype(urb->pipe) == PIPE_CONTROL)
usbip_dump_usb_ctrlrequest(
(struct usb_ctrlrequest *)urb->setup_packet);
dev_dbg(dev, " start_frame :%d\n", urb->start_frame);
dev_dbg(dev, " number_of_packets :%d\n", urb->number_of_packets);
dev_dbg(dev, " interval :%d\n", urb->interval);
dev_dbg(dev, " error_count :%d\n", urb->error_count);
dev_dbg(dev, " context :%p\n", urb->context);
dev_dbg(dev, " complete :%p\n", urb->complete);
}
EXPORT_SYMBOL_GPL(usbip_dump_urb);
void usbip_dump_header(struct usbip_header *pdu)
{
usbip_udbg("BASE: cmd %u seq %u devid %u dir %u ep %u\n",
pdu->base.command,
pdu->base.seqnum,
pdu->base.devid,
pdu->base.direction,
pdu->base.ep);
switch (pdu->base.command) {
case USBIP_CMD_SUBMIT:
usbip_udbg("CMD_SUBMIT: "
"x_flags %u x_len %u sf %u #p %u iv %u\n",
pdu->u.cmd_submit.transfer_flags,
pdu->u.cmd_submit.transfer_buffer_length,
pdu->u.cmd_submit.start_frame,
pdu->u.cmd_submit.number_of_packets,
pdu->u.cmd_submit.interval);
break;
case USBIP_CMD_UNLINK:
usbip_udbg("CMD_UNLINK: seq %u\n", pdu->u.cmd_unlink.seqnum);
break;
case USBIP_RET_SUBMIT:
usbip_udbg("RET_SUBMIT: st %d al %u sf %d ec %d\n",
pdu->u.ret_submit.status,
pdu->u.ret_submit.actual_length,
pdu->u.ret_submit.start_frame,
pdu->u.ret_submit.error_count);
case USBIP_RET_UNLINK:
usbip_udbg("RET_UNLINK: status %d\n", pdu->u.ret_unlink.status);
break;
default:
/* NOT REACHED */
usbip_udbg("UNKNOWN\n");
}
}
EXPORT_SYMBOL_GPL(usbip_dump_header);
/*-------------------------------------------------------------------------*/
/* thread routines */
int usbip_thread(void *param)
{
struct usbip_task *ut = param;
if (!ut)
return -EINVAL;
lock_kernel();
daemonize(ut->name);
allow_signal(SIGKILL);
ut->thread = current;
unlock_kernel();
/* srv.rb must wait for rx_thread starting */
complete(&ut->thread_done);
/* start of while loop */
ut->loop_ops(ut);
/* end of loop */
ut->thread = NULL;
complete_and_exit(&ut->thread_done, 0);
}
int usbip_start_threads(struct usbip_device *ud)
{
/*
* threads are invoked per one device (per one connection).
*/
struct task_struct *th;
th = kthread_run(usbip_thread, (void *)&ud->tcp_rx, "usbip");
if (IS_ERR(th)) {
printk(KERN_WARNING
"Unable to start control thread\n");
return PTR_ERR(th);
}
th = kthread_run(usbip_thread, (void *)&ud->tcp_tx, "usbip");
if (IS_ERR(th)) {
printk(KERN_WARNING
"Unable to start control thread\n");
return PTR_ERR(th);
}
/* confirm threads are starting */
wait_for_completion(&ud->tcp_rx.thread_done);
wait_for_completion(&ud->tcp_tx.thread_done);
return 0;
}
EXPORT_SYMBOL_GPL(usbip_start_threads);
void usbip_stop_threads(struct usbip_device *ud)
{
/* kill threads related to this sdev, if v.c. exists */
if (ud->tcp_rx.thread != NULL) {
send_sig(SIGKILL, ud->tcp_rx.thread, 1);
wait_for_completion(&ud->tcp_rx.thread_done);
usbip_udbg("rx_thread for ud %p has finished\n", ud);
}
if (ud->tcp_tx.thread != NULL) {
send_sig(SIGKILL, ud->tcp_tx.thread, 1);
wait_for_completion(&ud->tcp_tx.thread_done);
usbip_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 (usbip_dbg_flag_xmit) */
char *bp = buf;
int osize = size;
usbip_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 (usbip_dbg_flag_xmit) {
if (send) {
if (!in_interrupt())
printk(KERN_DEBUG "%-10s:", current->comm);
else
printk(KERN_DEBUG "interrupt :");
printk(KERN_DEBUG "%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) {
usbip_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 (usbip_dbg_flag_xmit) {
if (!send) {
if (!in_interrupt())
printk(KERN_DEBUG "%-10s:", current->comm);
else
printk(KERN_DEBUG "interrupt :");
printk(KERN_DEBUG "usbip_xmit: receiving....\n");
usbip_dump_buffer(bp, osize);
printk(KERN_DEBUG "usbip_xmit: received, osize %d ret "
"%d size %d total %d\n", osize, result,
size, total);
}
if (send)
printk(KERN_DEBUG "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)
{
flags &= ~(URB_NO_TRANSFER_DMA_MAP|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) {
/* usbip_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");