^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2003-2008 Takahiro Hirofuchi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <asm/byteorder.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/kthread.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/usb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/usb/hcd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/scatterlist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include "usbip_common.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "stub.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) static int is_clear_halt_cmd(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct usb_ctrlrequest *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) req = (struct usb_ctrlrequest *) urb->setup_packet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) return (req->bRequest == USB_REQ_CLEAR_FEATURE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) (req->bRequestType == USB_RECIP_ENDPOINT) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) (req->wValue == USB_ENDPOINT_HALT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static int is_set_interface_cmd(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct usb_ctrlrequest *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) req = (struct usb_ctrlrequest *) urb->setup_packet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) return (req->bRequest == USB_REQ_SET_INTERFACE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) (req->bRequestType == USB_RECIP_INTERFACE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static int is_set_configuration_cmd(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct usb_ctrlrequest *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) req = (struct usb_ctrlrequest *) urb->setup_packet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return (req->bRequest == USB_REQ_SET_CONFIGURATION) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) (req->bRequestType == USB_RECIP_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static int is_reset_device_cmd(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct usb_ctrlrequest *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) __u16 value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) __u16 index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) req = (struct usb_ctrlrequest *) urb->setup_packet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) value = le16_to_cpu(req->wValue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) index = le16_to_cpu(req->wIndex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if ((req->bRequest == USB_REQ_SET_FEATURE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) (req->bRequestType == USB_RT_PORT) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) (value == USB_PORT_FEAT_RESET)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) usbip_dbg_stub_rx("reset_device_cmd, port %u\n", index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static int tweak_clear_halt_cmd(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct usb_ctrlrequest *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) int target_endp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) int target_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) int target_pipe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) req = (struct usb_ctrlrequest *) urb->setup_packet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * The stalled endpoint is specified in the wIndex value. The endpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * of the urb is the target of this clear_halt request (i.e., control
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * endpoint).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) target_endp = le16_to_cpu(req->wIndex) & 0x000f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /* the stalled endpoint direction is IN or OUT?. USB_DIR_IN is 0x80. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) target_dir = le16_to_cpu(req->wIndex) & 0x0080;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (target_dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) target_pipe = usb_rcvctrlpipe(urb->dev, target_endp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) target_pipe = usb_sndctrlpipe(urb->dev, target_endp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) ret = usb_clear_halt(urb->dev, target_pipe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) dev_err(&urb->dev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) "usb_clear_halt error: devnum %d endp %d ret %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) urb->dev->devnum, target_endp, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) dev_info(&urb->dev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) "usb_clear_halt done: devnum %d endp %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) urb->dev->devnum, target_endp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static int tweak_set_interface_cmd(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct usb_ctrlrequest *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) __u16 alternate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) __u16 interface;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) req = (struct usb_ctrlrequest *) urb->setup_packet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) alternate = le16_to_cpu(req->wValue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) interface = le16_to_cpu(req->wIndex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) usbip_dbg_stub_rx("set_interface: inf %u alt %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) interface, alternate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) ret = usb_set_interface(urb->dev, interface, alternate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) dev_err(&urb->dev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) "usb_set_interface error: inf %u alt %u ret %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) interface, alternate, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) dev_info(&urb->dev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) "usb_set_interface done: inf %u alt %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) interface, alternate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static int tweak_set_configuration_cmd(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct stub_priv *priv = (struct stub_priv *) urb->context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) struct stub_device *sdev = priv->sdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) struct usb_ctrlrequest *req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) __u16 config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) req = (struct usb_ctrlrequest *) urb->setup_packet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) config = le16_to_cpu(req->wValue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) err = usb_set_configuration(sdev->udev, config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (err && err != -ENODEV)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) dev_err(&sdev->udev->dev, "can't set config #%d, error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) config, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static int tweak_reset_device_cmd(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) struct stub_priv *priv = (struct stub_priv *) urb->context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) struct stub_device *sdev = priv->sdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) dev_info(&urb->dev->dev, "usb_queue_reset_device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (usb_lock_device_for_reset(sdev->udev, NULL) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) dev_err(&urb->dev->dev, "could not obtain lock to reset device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) usb_reset_device(sdev->udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) usb_unlock_device(sdev->udev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * clear_halt, set_interface, and set_configuration require special tricks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static void tweak_special_requests(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if (!urb || !urb->setup_packet)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (usb_pipetype(urb->pipe) != PIPE_CONTROL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if (is_clear_halt_cmd(urb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) /* tweak clear_halt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) tweak_clear_halt_cmd(urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) else if (is_set_interface_cmd(urb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) /* tweak set_interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) tweak_set_interface_cmd(urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) else if (is_set_configuration_cmd(urb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) /* tweak set_configuration */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) tweak_set_configuration_cmd(urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) else if (is_reset_device_cmd(urb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) tweak_reset_device_cmd(urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) usbip_dbg_stub_rx("no need to tweak\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * stub_recv_unlink() unlinks the URB by a call to usb_unlink_urb().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * By unlinking the urb asynchronously, stub_rx can continuously
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * process coming urbs. Even if the urb is unlinked, its completion
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) * handler will be called and stub_tx will send a return pdu.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) * See also comments about unlinking strategy in vhci_hcd.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) static int stub_recv_cmd_unlink(struct stub_device *sdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) struct usbip_header *pdu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) int ret, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) struct stub_priv *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) spin_lock_irqsave(&sdev->priv_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) list_for_each_entry(priv, &sdev->priv_init, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (priv->seqnum != pdu->u.cmd_unlink.seqnum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) * This matched urb is not completed yet (i.e., be in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) * flight in usb hcd hardware/driver). Now we are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) * cancelling it. The unlinking flag means that we are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) * now not going to return the normal result pdu of a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * submission request, but going to return a result pdu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) * of the unlink request.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) priv->unlinking = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * In the case that unlinking flag is on, prev->seqnum
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) * is changed from the seqnum of the cancelling urb to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * the seqnum of the unlink request. This will be used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * to make the result pdu of the unlink request.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) priv->seqnum = pdu->base.seqnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) spin_unlock_irqrestore(&sdev->priv_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) * usb_unlink_urb() is now out of spinlocking to avoid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) * spinlock recursion since stub_complete() is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) * sometimes called in this context but not in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) * interrupt context. If stub_complete() is executed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) * before we call usb_unlink_urb(), usb_unlink_urb()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) * will return an error value. In this case, stub_tx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) * will return the result pdu of this unlink request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) * though submission is completed and actual unlinking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) * is not executed. OK?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) /* In the above case, urb->status is not -ECONNRESET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) * so a driver in a client host will know the failure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) * of the unlink request ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) for (i = priv->completed_urbs; i < priv->num_urbs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) ret = usb_unlink_urb(priv->urbs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) if (ret != -EINPROGRESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) dev_err(&priv->urbs[i]->dev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) "failed to unlink %d/%d urb of seqnum %lu, ret %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) i + 1, priv->num_urbs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) priv->seqnum, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) usbip_dbg_stub_rx("seqnum %d is not pending\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) pdu->u.cmd_unlink.seqnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * The urb of the unlink target is not found in priv_init queue. It was
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) * already completed and its results is/was going to be sent by a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) * CMD_RET pdu. In this case, usb_unlink_urb() is not needed. We only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) * return the completeness of this unlink request to vhci_hcd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) stub_enqueue_ret_unlink(sdev, pdu->base.seqnum, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) spin_unlock_irqrestore(&sdev->priv_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) static int valid_request(struct stub_device *sdev, struct usbip_header *pdu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) struct usbip_device *ud = &sdev->ud;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) int valid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) if (pdu->base.devid == sdev->devid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) spin_lock_irq(&ud->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if (ud->status == SDEV_ST_USED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) /* A request is valid. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) valid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) spin_unlock_irq(&ud->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) return valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) static struct stub_priv *stub_priv_alloc(struct stub_device *sdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) struct usbip_header *pdu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) struct stub_priv *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) struct usbip_device *ud = &sdev->ud;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) spin_lock_irqsave(&sdev->priv_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) priv = kmem_cache_zalloc(stub_priv_cache, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) if (!priv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) dev_err(&sdev->udev->dev, "alloc stub_priv\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) spin_unlock_irqrestore(&sdev->priv_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) priv->seqnum = pdu->base.seqnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) priv->sdev = sdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) * After a stub_priv is linked to a list_head,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) * our error handler can free allocated data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) list_add_tail(&priv->list, &sdev->priv_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) spin_unlock_irqrestore(&sdev->priv_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) return priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) static int get_pipe(struct stub_device *sdev, struct usbip_header *pdu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) struct usb_device *udev = sdev->udev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) struct usb_host_endpoint *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) struct usb_endpoint_descriptor *epd = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) int epnum = pdu->base.ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) int dir = pdu->base.direction;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) if (epnum < 0 || epnum > 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) goto err_ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) if (dir == USBIP_DIR_IN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) ep = udev->ep_in[epnum & 0x7f];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) ep = udev->ep_out[epnum & 0x7f];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) if (!ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) goto err_ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) epd = &ep->desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) if (usb_endpoint_xfer_control(epd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) if (dir == USBIP_DIR_OUT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) return usb_sndctrlpipe(udev, epnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) return usb_rcvctrlpipe(udev, epnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) if (usb_endpoint_xfer_bulk(epd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (dir == USBIP_DIR_OUT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) return usb_sndbulkpipe(udev, epnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) return usb_rcvbulkpipe(udev, epnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) if (usb_endpoint_xfer_int(epd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) if (dir == USBIP_DIR_OUT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) return usb_sndintpipe(udev, epnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) return usb_rcvintpipe(udev, epnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (usb_endpoint_xfer_isoc(epd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) /* validate number of packets */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (pdu->u.cmd_submit.number_of_packets < 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) pdu->u.cmd_submit.number_of_packets >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) USBIP_MAX_ISO_PACKETS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) dev_err(&sdev->udev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) "CMD_SUBMIT: isoc invalid num packets %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) pdu->u.cmd_submit.number_of_packets);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) if (dir == USBIP_DIR_OUT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) return usb_sndisocpipe(udev, epnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) return usb_rcvisocpipe(udev, epnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) err_ret:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) /* NOT REACHED */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) dev_err(&sdev->udev->dev, "CMD_SUBMIT: invalid epnum %d\n", epnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) static void masking_bogus_flags(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) int xfertype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) struct usb_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) struct usb_host_endpoint *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) int is_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) unsigned int allowed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (!urb || urb->hcpriv || !urb->complete)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) dev = urb->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if ((!dev) || (dev->state < USB_STATE_UNAUTHENTICATED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) ep = (usb_pipein(urb->pipe) ? dev->ep_in : dev->ep_out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) [usb_pipeendpoint(urb->pipe)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) if (!ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) xfertype = usb_endpoint_type(&ep->desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) if (xfertype == USB_ENDPOINT_XFER_CONTROL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) struct usb_ctrlrequest *setup =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) (struct usb_ctrlrequest *) urb->setup_packet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) if (!setup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) is_out = !(setup->bRequestType & USB_DIR_IN) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) !setup->wLength;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) is_out = usb_endpoint_dir_out(&ep->desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) /* enforce simple/standard policy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) allowed = (URB_NO_TRANSFER_DMA_MAP | URB_NO_INTERRUPT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) URB_DIR_MASK | URB_FREE_BUFFER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) switch (xfertype) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) case USB_ENDPOINT_XFER_BULK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) if (is_out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) allowed |= URB_ZERO_PACKET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) default: /* all non-iso endpoints */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) if (!is_out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) allowed |= URB_SHORT_NOT_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) case USB_ENDPOINT_XFER_ISOC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) allowed |= URB_ISO_ASAP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) urb->transfer_flags &= allowed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) static int stub_recv_xbuff(struct usbip_device *ud, struct stub_priv *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) for (i = 0; i < priv->num_urbs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) ret = usbip_recv_xbuff(ud, priv->urbs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) static void stub_recv_cmd_submit(struct stub_device *sdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) struct usbip_header *pdu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) struct stub_priv *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) struct usbip_device *ud = &sdev->ud;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) struct usb_device *udev = sdev->udev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) struct scatterlist *sgl = NULL, *sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) void *buffer = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) unsigned long long buf_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) int nents;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) int num_urbs = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) int pipe = get_pipe(sdev, pdu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) int use_sg = pdu->u.cmd_submit.transfer_flags & URB_DMA_MAP_SG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) int support_sg = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) int np = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) int ret, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) if (pipe == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) * Smatch reported the error case where use_sg is true and buf_len is 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) * In this case, It adds SDEV_EVENT_ERROR_MALLOC and stub_priv will be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) * released by stub event handler and connection will be shut down.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) priv = stub_priv_alloc(sdev, pdu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) buf_len = (unsigned long long)pdu->u.cmd_submit.transfer_buffer_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (use_sg && !buf_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) dev_err(&udev->dev, "sg buffer with zero length\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) goto err_malloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) /* allocate urb transfer buffer, if needed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) if (buf_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) if (use_sg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) sgl = sgl_alloc(buf_len, GFP_KERNEL, &nents);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) if (!sgl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) goto err_malloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) /* Check if the server's HCD supports SG */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) if (!udev->bus->sg_tablesize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) * If the server's HCD doesn't support SG, break
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) * a single SG request into several URBs and map
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) * each SG list entry to corresponding URB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) * buffer. The previously allocated SG list is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) * stored in priv->sgl (If the server's HCD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) * support SG, SG list is stored only in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) * urb->sg) and it is used as an indicator that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) * the server split single SG request into
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) * several URBs. Later, priv->sgl is used by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) * stub_complete() and stub_send_ret_submit() to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) * reassemble the divied URBs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) support_sg = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) num_urbs = nents;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) priv->completed_urbs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) pdu->u.cmd_submit.transfer_flags &=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) ~URB_DMA_MAP_SG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) buffer = kzalloc(buf_len, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if (!buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) goto err_malloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) /* allocate urb array */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) priv->num_urbs = num_urbs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) priv->urbs = kmalloc_array(num_urbs, sizeof(*priv->urbs), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) if (!priv->urbs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) goto err_urbs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) /* setup a urb */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) if (support_sg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) if (usb_pipeisoc(pipe))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) np = pdu->u.cmd_submit.number_of_packets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) priv->urbs[0] = usb_alloc_urb(np, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) if (!priv->urbs[0])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) goto err_urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) if (buf_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) if (use_sg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) priv->urbs[0]->sg = sgl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) priv->urbs[0]->num_sgs = nents;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) priv->urbs[0]->transfer_buffer = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) priv->urbs[0]->transfer_buffer = buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) /* copy urb setup packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) priv->urbs[0]->setup_packet = kmemdup(&pdu->u.cmd_submit.setup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) 8, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) if (!priv->urbs[0]->setup_packet) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) usbip_pack_pdu(pdu, priv->urbs[0], USBIP_CMD_SUBMIT, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) for_each_sg(sgl, sg, nents, i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) priv->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) /* The URBs which is previously allocated will be freed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) * in stub_device_cleanup_urbs() if error occurs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) if (!priv->urbs[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) goto err_urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) usbip_pack_pdu(pdu, priv->urbs[i], USBIP_CMD_SUBMIT, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) priv->urbs[i]->transfer_buffer = sg_virt(sg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) priv->urbs[i]->transfer_buffer_length = sg->length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) priv->sgl = sgl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) for (i = 0; i < num_urbs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) /* set other members from the base header of pdu */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) priv->urbs[i]->context = (void *) priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) priv->urbs[i]->dev = udev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) priv->urbs[i]->pipe = pipe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) priv->urbs[i]->complete = stub_complete;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) /* no need to submit an intercepted request, but harmless? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) tweak_special_requests(priv->urbs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) masking_bogus_flags(priv->urbs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) if (stub_recv_xbuff(ud, priv) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) if (usbip_recv_iso(ud, priv->urbs[0]) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) /* urb is now ready to submit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) for (i = 0; i < priv->num_urbs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) ret = usb_submit_urb(priv->urbs[i], GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) if (ret == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) usbip_dbg_stub_rx("submit urb ok, seqnum %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) pdu->base.seqnum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) dev_err(&udev->dev, "submit_urb error, %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) usbip_dump_header(pdu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) usbip_dump_urb(priv->urbs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) * Pessimistic.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) * This connection will be discarded.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) usbip_event_add(ud, SDEV_EVENT_ERROR_SUBMIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) usbip_dbg_stub_rx("Leave\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) err_urb:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) kfree(priv->urbs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) err_urbs:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) kfree(buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) sgl_free(sgl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) err_malloc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) /* recv a pdu */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) static void stub_rx_pdu(struct usbip_device *ud)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) struct usbip_header pdu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) struct stub_device *sdev = container_of(ud, struct stub_device, ud);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) struct device *dev = &sdev->udev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) usbip_dbg_stub_rx("Enter\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) memset(&pdu, 0, sizeof(pdu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) /* receive a pdu header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) ret = usbip_recv(ud->tcp_socket, &pdu, sizeof(pdu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) if (ret != sizeof(pdu)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) dev_err(dev, "recv a header, %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) usbip_header_correct_endian(&pdu, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) if (usbip_dbg_flag_stub_rx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) usbip_dump_header(&pdu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) if (!valid_request(sdev, &pdu)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) dev_err(dev, "recv invalid request\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) switch (pdu.base.command) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) case USBIP_CMD_UNLINK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) stub_recv_cmd_unlink(sdev, &pdu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) case USBIP_CMD_SUBMIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) stub_recv_cmd_submit(sdev, &pdu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) /* NOTREACHED */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) dev_err(dev, "unknown pdu\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) int stub_rx_loop(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) struct usbip_device *ud = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) while (!kthread_should_stop()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) if (usbip_event_happened(ud))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) stub_rx_pdu(ud);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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