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path: root/drivers/staging/usbip
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-rw-r--r--drivers/staging/usbip/stub_rx.c40
-rw-r--r--drivers/staging/usbip/stub_tx.c74
-rw-r--r--drivers/staging/usbip/usbip_common.c64
-rw-r--r--drivers/staging/usbip/usbip_common.h2
-rw-r--r--drivers/staging/usbip/vhci_rx.c3
5 files changed, 143 insertions, 40 deletions
diff --git a/drivers/staging/usbip/stub_rx.c b/drivers/staging/usbip/stub_rx.c
index ae6ac82754a..8e60332efae 100644
--- a/drivers/staging/usbip/stub_rx.c
+++ b/drivers/staging/usbip/stub_rx.c
@@ -170,33 +170,23 @@ static int tweak_set_configuration_cmd(struct urb *urb)
static int tweak_reset_device_cmd(struct urb *urb)
{
- struct usb_ctrlrequest *req;
- __u16 value;
- __u16 index;
- int ret;
-
- req = (struct usb_ctrlrequest *) urb->setup_packet;
- value = le16_to_cpu(req->wValue);
- index = le16_to_cpu(req->wIndex);
-
- usbip_uinfo("reset_device (port %d) to %s\n", index,
- dev_name(&urb->dev->dev));
+ struct stub_priv *priv = (struct stub_priv *) urb->context;
+ struct stub_device *sdev = priv->sdev;
- /* all interfaces should be owned by usbip driver, so just reset it. */
- ret = usb_lock_device_for_reset(urb->dev, NULL);
- if (ret < 0) {
- dev_err(&urb->dev->dev, "lock for reset\n");
- return ret;
- }
-
- /* try to reset the device */
- ret = usb_reset_device(urb->dev);
- if (ret < 0)
- dev_err(&urb->dev->dev, "device reset\n");
+ usbip_uinfo("reset_device %s\n", dev_name(&urb->dev->dev));
- usb_unlock_device(urb->dev);
-
- return ret;
+ /*
+ * usb_lock_device_for_reset caused a deadlock: it causes the driver
+ * to unbind. In the shutdown the rx thread is signalled to shut down
+ * but this thread is pending in the usb_lock_device_for_reset.
+ *
+ * Instead queue the reset.
+ *
+ * Unfortunatly an existing usbip connection will be dropped due to
+ * driver unbinding.
+ */
+ usb_queue_reset_device(sdev->interface);
+ return 0;
}
/*
diff --git a/drivers/staging/usbip/stub_tx.c b/drivers/staging/usbip/stub_tx.c
index d7136e2c86f..b7a493c1df4 100644
--- a/drivers/staging/usbip/stub_tx.c
+++ b/drivers/staging/usbip/stub_tx.c
@@ -169,7 +169,6 @@ static int stub_send_ret_submit(struct stub_device *sdev)
struct stub_priv *priv, *tmp;
struct msghdr msg;
- struct kvec iov[3];
size_t txsize;
size_t total_size = 0;
@@ -179,28 +178,73 @@ static int stub_send_ret_submit(struct stub_device *sdev)
struct urb *urb = priv->urb;
struct usbip_header pdu_header;
void *iso_buffer = NULL;
+ struct kvec *iov = NULL;
+ int iovnum = 0;
txsize = 0;
memset(&pdu_header, 0, sizeof(pdu_header));
memset(&msg, 0, sizeof(msg));
- memset(&iov, 0, sizeof(iov));
- usbip_dbg_stub_tx("setup txdata urb %p\n", urb);
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
+ iovnum = 2 + urb->number_of_packets;
+ else
+ iovnum = 2;
+
+ iov = kzalloc(iovnum * sizeof(struct kvec), GFP_KERNEL);
+ if (!iov) {
+ usbip_event_add(&sdev->ud, SDEV_EVENT_ERROR_MALLOC);
+ return -1;
+ }
+
+ iovnum = 0;
/* 1. setup usbip_header */
setup_ret_submit_pdu(&pdu_header, urb);
+ usbip_dbg_stub_tx("setup txdata seqnum: %d urb: %p\n",
+ pdu_header.base.seqnum, urb);
+ /*usbip_dump_header(pdu_header);*/
usbip_header_correct_endian(&pdu_header, 1);
- iov[0].iov_base = &pdu_header;
- iov[0].iov_len = sizeof(pdu_header);
+ iov[iovnum].iov_base = &pdu_header;
+ iov[iovnum].iov_len = sizeof(pdu_header);
+ iovnum++;
txsize += sizeof(pdu_header);
/* 2. setup transfer buffer */
- if (usb_pipein(urb->pipe) && urb->actual_length > 0) {
- iov[1].iov_base = urb->transfer_buffer;
- iov[1].iov_len = urb->actual_length;
+ if (usb_pipein(urb->pipe) &&
+ usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS &&
+ urb->actual_length > 0) {
+ iov[iovnum].iov_base = urb->transfer_buffer;
+ iov[iovnum].iov_len = urb->actual_length;
+ iovnum++;
txsize += urb->actual_length;
+ } else if (usb_pipein(urb->pipe) &&
+ usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+ /*
+ * For isochronous packets: actual length is the sum of
+ * the actual length of the individual, packets, but as
+ * the packet offsets are not changed there will be
+ * padding between the packets. To optimally use the
+ * bandwidth the padding is not transmitted.
+ */
+
+ int i;
+ for (i = 0; i < urb->number_of_packets; i++) {
+ iov[iovnum].iov_base = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
+ iov[iovnum].iov_len = urb->iso_frame_desc[i].actual_length;
+ iovnum++;
+ txsize += urb->iso_frame_desc[i].actual_length;
+ }
+
+ if (txsize != sizeof(pdu_header) + urb->actual_length) {
+ dev_err(&sdev->interface->dev,
+ "actual length of urb (%d) does not match iso packet sizes (%d)\n",
+ urb->actual_length, txsize-sizeof(pdu_header));
+ kfree(iov);
+ usbip_event_add(&sdev->ud, SDEV_EVENT_ERROR_TCP);
+ return -1;
+ }
}
/* 3. setup iso_packet_descriptor */
@@ -211,32 +255,34 @@ static int stub_send_ret_submit(struct stub_device *sdev)
if (!iso_buffer) {
usbip_event_add(&sdev->ud,
SDEV_EVENT_ERROR_MALLOC);
+ kfree(iov);
return -1;
}
- iov[2].iov_base = iso_buffer;
- iov[2].iov_len = len;
+ iov[iovnum].iov_base = iso_buffer;
+ iov[iovnum].iov_len = len;
txsize += len;
+ iovnum++;
}
- ret = kernel_sendmsg(sdev->ud.tcp_socket, &msg, iov,
- 3, txsize);
+ ret = kernel_sendmsg(sdev->ud.tcp_socket, &msg,
+ iov, iovnum, txsize);
if (ret != txsize) {
dev_err(&sdev->interface->dev,
"sendmsg failed!, retval %d for %zd\n",
ret, txsize);
+ kfree(iov);
kfree(iso_buffer);
usbip_event_add(&sdev->ud, SDEV_EVENT_ERROR_TCP);
return -1;
}
+ kfree(iov);
kfree(iso_buffer);
- usbip_dbg_stub_tx("send txdata\n");
total_size += txsize;
}
-
spin_lock_irqsave(&sdev->priv_lock, flags);
list_for_each_entry_safe(priv, tmp, &sdev->priv_free, list) {
diff --git a/drivers/staging/usbip/usbip_common.c b/drivers/staging/usbip/usbip_common.c
index 210ef16bab8..2108ca15542 100644
--- a/drivers/staging/usbip/usbip_common.c
+++ b/drivers/staging/usbip/usbip_common.c
@@ -334,10 +334,11 @@ void usbip_dump_header(struct usbip_header *pdu)
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",
+ usbip_udbg("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);
case USBIP_RET_UNLINK:
usbip_udbg("RET_UNLINK: status %d\n", pdu->u.ret_unlink.status);
@@ -625,6 +626,7 @@ static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb,
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 {
/* vhci_rx.c */
@@ -632,6 +634,7 @@ static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb,
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;
}
}
@@ -700,11 +703,13 @@ static void correct_endian_ret_submit(struct usbip_header_ret_submit *pdu,
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);
+ cpu_to_be32s(&pdu->number_of_packets);
be32_to_cpus(&pdu->error_count);
}
}
@@ -830,6 +835,7 @@ int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
int size = np * sizeof(*iso);
int i;
int ret;
+ int total_length = 0;
if (!usb_pipeisoc(urb->pipe))
return 0;
@@ -859,19 +865,75 @@ int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
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);
+ 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
+ */
+int usbip_pad_iso(struct usbip_device *ud, struct urb *urb)
+{
+ int np = urb->number_of_packets;
+ int i;
+ int ret;
+ int actualoffset = urb->actual_length;
+
+ if (!usb_pipeisoc(urb->pipe))
+ return 0;
+
+ /* if no packets or length of data is 0, then nothing to unpack */
+ if (np == 0 || urb->actual_length == 0)
+ return 0;
+
+ /*
+ * if actual_length is transfer_buffer_length then no padding is
+ * present.
+ */
+ if (urb->actual_length == urb->transfer_buffer_length)
+ return 0;
+
+ /*
+ * 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);
+ }
+ return ret;
+}
+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)
diff --git a/drivers/staging/usbip/usbip_common.h b/drivers/staging/usbip/usbip_common.h
index d280e234e06..baa4c09bb98 100644
--- a/drivers/staging/usbip/usbip_common.h
+++ b/drivers/staging/usbip/usbip_common.h
@@ -393,6 +393,8 @@ void usbip_header_correct_endian(struct usbip_header *pdu, int send);
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);
+/* some members of urb must be substituted before. */
+int usbip_pad_iso(struct usbip_device *ud, struct urb *urb);
void *usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen);
diff --git a/drivers/staging/usbip/vhci_rx.c b/drivers/staging/usbip/vhci_rx.c
index bf699147094..109002a347b 100644
--- a/drivers/staging/usbip/vhci_rx.c
+++ b/drivers/staging/usbip/vhci_rx.c
@@ -99,6 +99,9 @@ static void vhci_recv_ret_submit(struct vhci_device *vdev,
if (usbip_recv_iso(ud, urb) < 0)
return;
+ /* restore the padding in iso packets */
+ if (usbip_pad_iso(ud, urb) < 0)
+ return;
if (usbip_dbg_flag_vhci_rx)
usbip_dump_urb(urb);
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-30 07:07:12 +0000