| /* |
| * 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 <asm/byteorder.h> |
| #include <linux/file.h> |
| #include <linux/fs.h> |
| #include <linux/kernel.h> |
| #include <linux/slab.h> |
| #include <linux/stat.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <net/sock.h> |
| |
| #include "usbip_common.h" |
| |
| #define DRIVER_AUTHOR "Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>" |
| #define DRIVER_DESC "USB/IP Core" |
| |
| #ifdef CONFIG_USBIP_DEBUG |
| unsigned long usbip_debug_flag = 0xffffffff; |
| #else |
| unsigned long usbip_debug_flag; |
| #endif |
| EXPORT_SYMBOL_GPL(usbip_debug_flag); |
| module_param(usbip_debug_flag, ulong, S_IRUGO|S_IWUSR); |
| MODULE_PARM_DESC(usbip_debug_flag, "debug flags (defined in usbip_common.h)"); |
| |
| /* FIXME */ |
| struct device_attribute dev_attr_usbip_debug; |
| EXPORT_SYMBOL_GPL(dev_attr_usbip_debug); |
| |
| static ssize_t usbip_debug_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| return sprintf(buf, "%lx\n", usbip_debug_flag); |
| } |
| |
| static ssize_t usbip_debug_store(struct device *dev, |
| struct device_attribute *attr, const char *buf, |
| size_t count) |
| { |
| sscanf(buf, "%lx", &usbip_debug_flag); |
| return count; |
| } |
| DEVICE_ATTR_RW(usbip_debug); |
| |
| static void usbip_dump_buffer(char *buff, int bufflen) |
| { |
| print_hex_dump(KERN_DEBUG, "usbip-core", DUMP_PREFIX_OFFSET, 16, 4, |
| buff, bufflen, false); |
| } |
| |
| 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); |
| |
| pr_debug("dev(%d) ep(%d) [%s] ", dev, ep, dir ? "IN" : "OUT"); |
| |
| switch (type) { |
| case PIPE_ISOCHRONOUS: |
| pr_debug("ISO\n"); |
| break; |
| case PIPE_INTERRUPT: |
| pr_debug("INT\n"); |
| break; |
| case PIPE_CONTROL: |
| pr_debug("CTRL\n"); |
| break; |
| case PIPE_BULK: |
| pr_debug("BULK\n"); |
| break; |
| default: |
| pr_debug("ERR\n"); |
| break; |
| } |
| } |
| |
| 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: |
| pr_debug("SPD_HIGH "); |
| break; |
| case USB_SPEED_FULL: |
| pr_debug("SPD_FULL "); |
| break; |
| case USB_SPEED_LOW: |
| pr_debug("SPD_LOW "); |
| break; |
| case USB_SPEED_UNKNOWN: |
| pr_debug("SPD_UNKNOWN "); |
| break; |
| default: |
| pr_debug("SPD_ERROR "); |
| break; |
| } |
| |
| pr_debug("tt %p, ttport %d\n", udev->tt, udev->ttport); |
| |
| dev_dbg(dev, " "); |
| for (i = 0; i < 16; i++) |
| pr_debug(" %2u", i); |
| pr_debug("\n"); |
| |
| dev_dbg(dev, " toggle0(IN) :"); |
| for (i = 0; i < 16; i++) |
| pr_debug(" %2u", (udev->toggle[0] & (1 << i)) ? 1 : 0); |
| pr_debug("\n"); |
| |
| dev_dbg(dev, " toggle1(OUT):"); |
| for (i = 0; i < 16; i++) |
| pr_debug(" %2u", (udev->toggle[1] & (1 << i)) ? 1 : 0); |
| pr_debug("\n"); |
| |
| dev_dbg(dev, " epmaxp_in :"); |
| for (i = 0; i < 16; i++) { |
| if (udev->ep_in[i]) |
| pr_debug(" %2u", |
| le16_to_cpu(udev->ep_in[i]->desc.wMaxPacketSize)); |
| } |
| pr_debug("\n"); |
| |
| dev_dbg(dev, " epmaxp_out :"); |
| for (i = 0; i < 16; i++) { |
| if (udev->ep_out[i]) |
| pr_debug(" %2u", |
| le16_to_cpu(udev->ep_out[i]->desc.wMaxPacketSize)); |
| } |
| pr_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\n", udev->maxchild); |
| } |
| |
| static void usbip_dump_request_type(__u8 rt) |
| { |
| switch (rt & USB_RECIP_MASK) { |
| case USB_RECIP_DEVICE: |
| pr_debug("DEVICE"); |
| break; |
| case USB_RECIP_INTERFACE: |
| pr_debug("INTERF"); |
| break; |
| case USB_RECIP_ENDPOINT: |
| pr_debug("ENDPOI"); |
| break; |
| case USB_RECIP_OTHER: |
| pr_debug("OTHER "); |
| break; |
| default: |
| pr_debug("------"); |
| break; |
| } |
| } |
| |
| static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd) |
| { |
| if (!cmd) { |
| pr_debug(" : null pointer\n"); |
| return; |
| } |
| |
| pr_debug(" "); |
| pr_debug("bRequestType(%02X) bRequest(%02X) wValue(%04X) wIndex(%04X) " |
| "wLength(%04X) ", cmd->bRequestType, cmd->bRequest, |
| cmd->wValue, cmd->wIndex, cmd->wLength); |
| pr_debug("\n "); |
| |
| if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { |
| pr_debug("STANDARD "); |
| switch (cmd->bRequest) { |
| case USB_REQ_GET_STATUS: |
| pr_debug("GET_STATUS\n"); |
| break; |
| case USB_REQ_CLEAR_FEATURE: |
| pr_debug("CLEAR_FEAT\n"); |
| break; |
| case USB_REQ_SET_FEATURE: |
| pr_debug("SET_FEAT\n"); |
| break; |
| case USB_REQ_SET_ADDRESS: |
| pr_debug("SET_ADDRRS\n"); |
| break; |
| case USB_REQ_GET_DESCRIPTOR: |
| pr_debug("GET_DESCRI\n"); |
| break; |
| case USB_REQ_SET_DESCRIPTOR: |
| pr_debug("SET_DESCRI\n"); |
| break; |
| case USB_REQ_GET_CONFIGURATION: |
| pr_debug("GET_CONFIG\n"); |
| break; |
| case USB_REQ_SET_CONFIGURATION: |
| pr_debug("SET_CONFIG\n"); |
| break; |
| case USB_REQ_GET_INTERFACE: |
| pr_debug("GET_INTERF\n"); |
| break; |
| case USB_REQ_SET_INTERFACE: |
| pr_debug("SET_INTERF\n"); |
| break; |
| case USB_REQ_SYNCH_FRAME: |
| pr_debug("SYNC_FRAME\n"); |
| break; |
| default: |
| pr_debug("REQ(%02X)\n", cmd->bRequest); |
| break; |
| } |
| usbip_dump_request_type(cmd->bRequestType); |
| } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS) { |
| pr_debug("CLASS\n"); |
| } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR) { |
| pr_debug("VENDOR\n"); |
| } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_RESERVED) { |
| pr_debug("RESERVED\n"); |
| } |
| } |
| |
| void usbip_dump_urb(struct urb *urb) |
| { |
| struct device *dev; |
| |
| if (!urb) { |
| pr_debug("urb: null pointer!!\n"); |
| return; |
| } |
| |
| if (!urb->dev) { |
| pr_debug("urb->dev: null pointer!!\n"); |
| 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) |
| { |
| pr_debug("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: |
| pr_debug("USBIP_CMD_SUBMIT: " |
| "x_flags %u x_len %u sf %u #p %d iv %d\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: |
| pr_debug("USBIP_CMD_UNLINK: seq %u\n", |
| pdu->u.cmd_unlink.seqnum); |
| break; |
| case USBIP_RET_SUBMIT: |
| pr_debug("USBIP_RET_SUBMIT: st %d al %u sf %d #p %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.number_of_packets, |
| pdu->u.ret_submit.error_count); |
| break; |
| case USBIP_RET_UNLINK: |
| pr_debug("USBIP_RET_UNLINK: status %d\n", |
| pdu->u.ret_unlink.status); |
| break; |
| default: |
| /* NOT REACHED */ |
| pr_err("unknown command\n"); |
| break; |
| } |
| } |
| EXPORT_SYMBOL_GPL(usbip_dump_header); |
| |
| /* Receive data over TCP/IP. */ |
| int usbip_recv(struct socket *sock, void *buf, int size) |
| { |
| 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) { |
| pr_err("invalid arg, sock %p buff %p size %d\n", sock, buf, |
| size); |
| return -EINVAL; |
| } |
| |
| 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_NOSIGNAL; |
| |
| result = kernel_recvmsg(sock, &msg, &iov, 1, size, MSG_WAITALL); |
| if (result <= 0) { |
| pr_debug("receive sock %p buf %p size %u ret %d total %d\n", |
| sock, buf, size, result, total); |
| goto err; |
| } |
| |
| size -= result; |
| buf += result; |
| total += result; |
| } while (size > 0); |
| |
| if (usbip_dbg_flag_xmit) { |
| if (!in_interrupt()) |
| pr_debug("%-10s:", current->comm); |
| else |
| pr_debug("interrupt :"); |
| |
| pr_debug("receiving....\n"); |
| usbip_dump_buffer(bp, osize); |
| pr_debug("received, osize %d ret %d size %d total %d\n", |
| osize, result, size, total); |
| } |
| |
| return total; |
| |
| err: |
| return result; |
| } |
| EXPORT_SYMBOL_GPL(usbip_recv); |
| |
| struct socket *sockfd_to_socket(unsigned int sockfd) |
| { |
| struct socket *socket; |
| struct file *file; |
| struct inode *inode; |
| |
| file = fget(sockfd); |
| if (!file) { |
| pr_err("invalid sockfd\n"); |
| return NULL; |
| } |
| |
| inode = file_inode(file); |
| |
| if (!inode || !S_ISSOCK(inode->i_mode)) { |
| fput(file); |
| return NULL; |
| } |
| |
| socket = SOCKET_I(inode); |
| |
| return socket; |
| } |
| EXPORT_SYMBOL_GPL(sockfd_to_socket); |
| |
| /* there may be more cases to tweak the flags. */ |
| static unsigned int tweak_transfer_flags(unsigned int flags) |
| { |
| flags &= ~URB_NO_TRANSFER_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) { |
| 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 { |
| 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) { |
| rpdu->status = urb->status; |
| rpdu->actual_length = urb->actual_length; |
| rpdu->start_frame = urb->start_frame; |
| rpdu->number_of_packets = urb->number_of_packets; |
| rpdu->error_count = urb->error_count; |
| } else { |
| urb->status = rpdu->status; |
| urb->actual_length = rpdu->actual_length; |
| urb->start_frame = rpdu->start_frame; |
| urb->number_of_packets = rpdu->number_of_packets; |
| 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: |
| /* NOT REACHED */ |
| pr_err("unknown command\n"); |
| break; |
| } |
| } |
| 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->number_of_packets); |
| 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->number_of_packets); |
| 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: |
| /* NOT REACHED */ |
| pr_err("unknown command\n"); |
| break; |
| } |
| } |
| EXPORT_SYMBOL_GPL(usbip_header_correct_endian); |
| |
| static void usbip_iso_packet_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 */ |
| struct usbip_iso_packet_descriptor* |
| usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen) |
| { |
| struct usbip_iso_packet_descriptor *iso; |
| int np = urb->number_of_packets; |
| ssize_t size = np * sizeof(*iso); |
| int i; |
| |
| iso = kzalloc(size, GFP_KERNEL); |
| if (!iso) |
| return NULL; |
| |
| for (i = 0; i < np; i++) { |
| usbip_pack_iso(&iso[i], &urb->iso_frame_desc[i], 1); |
| usbip_iso_packet_correct_endian(&iso[i], 1); |
| } |
| |
| *bufflen = size; |
| |
| return iso; |
| } |
| 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; |
| int total_length = 0; |
| |
| if (!usb_pipeisoc(urb->pipe)) |
| return 0; |
| |
| /* my Bluetooth dongle gets ISO URBs which are np = 0 */ |
| if (np == 0) |
| return 0; |
| |
| buff = kzalloc(size, GFP_KERNEL); |
| if (!buff) |
| return -ENOMEM; |
| |
| ret = usbip_recv(ud->tcp_socket, buff, size); |
| 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; |
| } |
| |
| iso = (struct usbip_iso_packet_descriptor *) buff; |
| for (i = 0; i < np; i++) { |
| usbip_iso_packet_correct_endian(&iso[i], 0); |
| usbip_pack_iso(&iso[i], &urb->iso_frame_desc[i], 0); |
| total_length += urb->iso_frame_desc[i].actual_length; |
| } |
| |
| kfree(buff); |
| |
| if (total_length != urb->actual_length) { |
| dev_err(&urb->dev->dev, |
| "total length of iso packets %d not equal to actual " |
| "length of buffer %d\n", |
| total_length, urb->actual_length); |
| |
| 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_iso); |
| |
| /* |
| * This functions restores the padding which was removed for optimizing |
| * the bandwidth during transfer over tcp/ip |
| * |
| * buffer and iso packets need to be stored and be in propeper endian in urb |
| * before calling this function |
| */ |
| void usbip_pad_iso(struct usbip_device *ud, struct urb *urb) |
| { |
| int np = urb->number_of_packets; |
| int i; |
| int actualoffset = urb->actual_length; |
| |
| if (!usb_pipeisoc(urb->pipe)) |
| return; |
| |
| /* if no packets or length of data is 0, then nothing to unpack */ |
| if (np == 0 || urb->actual_length == 0) |
| return; |
| |
| /* |
| * if actual_length is transfer_buffer_length then no padding is |
| * present. |
| */ |
| if (urb->actual_length == urb->transfer_buffer_length) |
| return; |
| |
| /* |
| * loop over all packets from last to first (to prevent overwritting |
| * memory when padding) and move them into the proper place |
| */ |
| for (i = np-1; i > 0; i--) { |
| actualoffset -= urb->iso_frame_desc[i].actual_length; |
| memmove(urb->transfer_buffer + urb->iso_frame_desc[i].offset, |
| urb->transfer_buffer + actualoffset, |
| urb->iso_frame_desc[i].actual_length); |
| } |
| } |
| EXPORT_SYMBOL_GPL(usbip_pad_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) { |
| /* the direction of urb must be OUT. */ |
| if (usb_pipein(urb->pipe)) |
| return 0; |
| |
| size = urb->transfer_buffer_length; |
| } else { |
| /* 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_recv(ud->tcp_socket, urb->transfer_buffer, size); |
| 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_core_init(void) |
| { |
| pr_info(DRIVER_DESC " v" USBIP_VERSION "\n"); |
| return 0; |
| } |
| |
| static void __exit usbip_core_exit(void) |
| { |
| return; |
| } |
| |
| module_init(usbip_core_init); |
| module_exit(usbip_core_exit); |
| |
| MODULE_AUTHOR(DRIVER_AUTHOR); |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(USBIP_VERSION); |