On 12/26/2016 08:08 AM, Nobuo Iwata wrote:
> Refactoring to the daemon to reuse common portion for new application
> side daemon. It's divided into two portions.
>
> usbipd.c : common code for both device and application side daemon.
> usbipd_dev.c : device-side specific code extracted from usbipd.c.
>
> To do so, host driver dependent headers and declaration (i.e. static
> struct usbip_host_driver *driver;) are moved from usbipd.c to
> usbipd_dev.c.
>
> usbipd_driver_ops is introduced to call device-side specific driver
> operations from usbipd.c. It will also be used for application-side
> specific driver operation in succeeding patch.
> usbipd_driver_<somethig>()s are wrappers for the operations.
>
> usbipd_recv_pdu_op is introduced to share recv_pdu() routine.
>
> In diagram below, usbipd EXISTING-1 is the device-side daemon and NEW-1
> is the application side daemon.
>
> EXISTING) - invites devices from application(vhci)-side
> +------+ +------------------+
> device--+ STUB | | application/VHCI |
> +------+ +------------------+
> (server) (client)
> 1) # usbipd ... start daemon
> = = =
> 2) # usbip list --local
> 3) # usbip bind
> <--- list bound devices --- 4) # usbip list --remote
> <--- import a device ------ 5) # usbip attach
> = = =
> X disconnected 6) # usbip detach
> 7) usbip unbind
>
> NEW) - dedicates devices from device(stub)-side
> +------+ +------------------+
> device--+ STUB | | application/VHCI |
> +------+ +------------------+
> (client) (server)
> 1) # usbipa ... start daemon
> = = =
> 2) # usbip list --local
> 3) # usbip connect --- export a device ------>
> = = =
> 4) # usbip disconnect --- un-export a device --->
>
> Bind and unbind are done in connect and disconnect internally.
>
(...)
> +extern struct usbipd_recv_pdu_op usbipd_recv_pdu_ops[];
> +
> +struct usbipd_driver_ops {
> + void (*init)(void);
> + int (*set)(int type);
> + int (*open)(void);
> + void (*close)(void);
> + int (*refresh_device_list)(void);
> +};
> +
> +extern struct usbipd_driver_ops usbipd_driver_ops;
> +
> +static inline void usbipd_driver_init(void)
> +{
> + if (usbipd_driver_ops.init)
> + (*(usbipd_driver_ops.init))();
> +}
This function can be dropped if you add one more define below:
> +
> +#define USBIPD_DRIVER_TYPE_HOST 0
> +#define USBIPD_DRIVER_TYPE_DEVICE 1
#define USBIPD_DRIVER_TYPE_DEFAULT USBIPD_DRIVER_TYPE_HOST
Then instead of calling usbipd_driver_init()
You may simply call:
usbipd_driver_set(USBIPD_DRIVER_TYPE_DEFAULT)
> +
> +static inline void usbipd_driver_set(int type)
> +{
> + if (usbipd_driver_ops.set)
> + (*(usbipd_driver_ops.set))(type);
> +}
> +
> +static inline int usbipd_driver_open(void)
> +{
> + if (usbipd_driver_ops.open)
> + return (*(usbipd_driver_ops.open))();
> + return 0;
> +}
> +
> +static inline void usbipd_driver_close(void)
> +{
> + if (usbipd_driver_ops.close)
> + (*(usbipd_driver_ops.close))();
> +}
> +
> +static inline int usbipd_refresh_device_list(void)
> +{
> + if (usbipd_driver_ops.refresh_device_list)
> + return (*(usbipd_driver_ops.refresh_device_list))();
> + return 0;
> +}
> +
> +#endif /* __USBIPD_H */
> diff --git a/tools/usb/usbip/src/usbipd_dev.c
> b/tools/usb/usbip/src/usbipd_dev.c
> new file mode 100644
> index 0000000..0d59edd
> --- /dev/null
> +++ b/tools/usb/usbip/src/usbipd_dev.c
> @@ -0,0 +1,230 @@
> +/*
> + * Copyright (C) 2011 matt mooney <[email protected]>
> + * 2005-2007 Takahiro Hirofuchi
> + * Copyright (C) 2015-2016 Nobuo Iwata <[email protected]>
> + *
> + * This program 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 program 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, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#ifdef HAVE_CONFIG_H
> +#include "../config.h"
> +#endif
> +
> +#define _GNU_SOURCE
> +#include <errno.h>
> +#include <unistd.h>
> +#include <netdb.h>
> +#include <string.h>
> +#include <stdlib.h>
> +#include <sys/types.h>
> +#include <sys/stat.h>
> +#include <arpa/inet.h>
> +#include <sys/socket.h>
> +#include <netinet/in.h>
> +
> +#include "usbip_host_driver.h"
> +#include "usbip_host_common.h"
> +#include "usbip_device_driver.h"
> +#include "usbip_common.h"
> +#include "usbip_network.h"
> +#include "usbipd.h"
> +#include "list.h"
> +
> +char *usbip_progname = "usbipd";
> +char *usbip_default_pid_file = "/var/run/usbipd";
> +
> +static struct usbip_host_driver *driver;
> +
> +static void driver_init(void)
> +{
> + driver = &host_driver;
> +}
> +
> +static int driver_set(int type)
> +{
> + switch (type) {
> + case USBIPD_DRIVER_TYPE_HOST:
> + driver = &host_driver;
> + break;
> + case USBIPD_DRIVER_TYPE_DEVICE:
> + driver = &device_driver;
> + break;
> + default:
> + err("unknown driver type to set %d", type);
> + return -1;
> + }
> + return 0;
> +}
> +
> +static int driver_open(void)
> +{
> + return usbip_driver_open(driver);
> +}
> +
> +static void driver_close(void)
> +{
> + usbip_driver_close(driver);
> +}
> +
> +static int refresh_device_list(void)
> +{
> + return usbip_refresh_device_list(driver);
> +}
> +
> +struct usbipd_driver_ops usbipd_driver_ops = {
> + .init = driver_init,
> + .set = driver_set,
> + .open = driver_open,
> + .close = driver_close,
> + .refresh_device_list = refresh_device_list,
> +};
> +
> +static int recv_request_import(int sockfd)
> +{
> + struct op_import_request req;
> + struct usbip_exported_device *edev;
> + struct usbip_usb_device pdu_udev;
> + struct list_head *i;
> + int found = 0;
> + int error = 0;
> + int rc;
> +
> + memset(&req, 0, sizeof(req));
> +
> + rc = usbip_net_recv(sockfd, &req, sizeof(req));
> + if (rc < 0) {
> + dbg("usbip_net_recv failed: import request");
> + return -1;
> + }
> + PACK_OP_IMPORT_REQUEST(0, &req);
> +
> + list_for_each(i, &driver->edev_list) {
Using i as a list node name souds a little bit weird at least for me...
I know that it's not your fault because it was like that but please
rename it to node or sth like this.
> + edev = list_entry(i, struct usbip_exported_device, node);
> + if (!strncmp(req.busid, edev->udev.busid, SYSFS_BUS_ID_SIZE)) {
> + info("found requested device: %s", req.busid);
> + found = 1;
> + break;
> + }
> + }
> +
> + if (found) {
> + /* export device needs a TCP/IP socket descriptor */
> + rc = usbip_export_device(edev, sockfd);
> + if (rc < 0)
> + error = 1;
> + } else {
> + info("requested device not found: %s", req.busid);
> + error = 1;
> + }
> +
> + rc = usbip_net_send_op_common(sockfd, OP_REP_IMPORT,
> + (!error ? ST_OK : ST_NA));
> + if (rc < 0) {
> + dbg("usbip_net_send_op_common failed: %#0x", OP_REP_IMPORT);
> + return -1;
> + }
> +
> + if (error) {
> + dbg("import request busid %s: failed", req.busid);
> + return -1;
> + }
> +
> + memcpy(&pdu_udev, &edev->udev, sizeof(pdu_udev));
> + usbip_net_pack_usb_device(1, &pdu_udev);
> +
> + rc = usbip_net_send(sockfd, &pdu_udev, sizeof(pdu_udev));
> + if (rc < 0) {
> + dbg("usbip_net_send failed: devinfo");
> + return -1;
> + }
> +
> + dbg("import request busid %s: complete", req.busid);
> +
> + return 0;
> +}
> +
> +static int send_reply_devlist(int connfd)
> +{
> + struct usbip_exported_device *edev;
> + struct usbip_usb_device pdu_udev;
> + struct usbip_usb_interface pdu_uinf;
> + struct op_devlist_reply reply;
> + struct list_head *j;
> + int rc, i;
> +
> + reply.ndev = driver->ndevs;
> + info("importable devices: %d", reply.ndev);
> +
> + rc = usbip_net_send_op_common(connfd, OP_REP_DEVLIST, ST_OK);
> + if (rc < 0) {
> + dbg("usbip_net_send_op_common failed: %#0x", OP_REP_DEVLIST);
> + return -1;
> + }
> + PACK_OP_DEVLIST_REPLY(1, &reply);
> +
> + rc = usbip_net_send(connfd, &reply, sizeof(reply));
> + if (rc < 0) {
> + dbg("usbip_net_send failed: %#0x", OP_REP_DEVLIST);
> + return -1;
> + }
> +
> + list_for_each(j, &driver->edev_list) {
> + edev = list_entry(j, struct usbip_exported_device, node);
The same as above s/j/node...
> + dump_usb_device(&edev->udev);
> + memcpy(&pdu_udev, &edev->udev, sizeof(pdu_udev));
> + usbip_net_pack_usb_device(1, &pdu_udev);
> +
> + rc = usbip_net_send(connfd, &pdu_udev, sizeof(pdu_udev));
> + if (rc < 0) {
> + dbg("usbip_net_send failed: pdu_udev");
> + return -1;
> + }
> +
> + for (i = 0; i < edev->udev.bNumInterfaces; i++) {
> + dump_usb_interface(&edev->uinf[i]);
> + memcpy(&pdu_uinf, &edev->uinf[i], sizeof(pdu_uinf));
> + usbip_net_pack_usb_interface(1, &pdu_uinf);
> +
> + rc = usbip_net_send(connfd, &pdu_uinf,
> + sizeof(pdu_uinf));
> + if (rc < 0) {
> + err("usbip_net_send failed: pdu_uinf");
> + return -1;
> + }
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int recv_request_devlist(int connfd)
> +{
> + int rc;
> +
> + rc = send_reply_devlist(connfd);
> + if (rc < 0) {
> + dbg("send_reply_devlist failed");
> + return -1;
> + }
> +
> + return 0;
> +}
> +
> +struct usbipd_recv_pdu_op usbipd_recv_pdu_ops[] = {
> + {OP_REQ_DEVLIST, recv_request_devlist},
> + {OP_REQ_IMPORT, recv_request_import},
> + {OP_REQ_DEVINFO, NULL},
> + {OP_REQ_CRYPKEY, NULL},
> + {OP_UNSPEC, NULL}
> +};
>
--
Krzysztof Opasiak
Samsung R&D Institute Poland
Samsung Electronics
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