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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH V8 3/7] libxl: add pvusb API
Ian & George, any comments?
>>> On 10/21/2015 at 05:08 PM, in message
<1445418510-19614-4-git-send-email-cyliu@xxxxxxxx>, Chunyan Liu
<cyliu@xxxxxxxx> wrote:
> Add pvusb APIs, including:
> - attach/detach (create/destroy) virtual usb controller.
> - attach/detach usb device
> - list usb controller and usb devices
> - some other helper functions
>
> Signed-off-by: Chunyan Liu <cyliu@xxxxxxxx>
> Signed-off-by: Simon Cao <caobosimon@xxxxxxxxx>
>
> ---
> changes:
> - update COMPARE_USB to compare ctrl and port
> - add check in usb_add/remove to disable non-Dom0 backend so that
> not worring about codes which are effective on Dom0 but not
> compatible on non-Dom0 backend.
> - define READ_SUBPATH macro within functions
> - do not initialize rc but give it value in each return case
> - libxl__strdup gc or NOGC update, internal function using gc,
> external using NOGC.
> - address other comments from George and Ian J.
>
> tools/libxl/Makefile | 2 +-
> tools/libxl/libxl.c | 53 ++
> tools/libxl/libxl.h | 74 ++
> tools/libxl/libxl_device.c | 5 +-
> tools/libxl/libxl_internal.h | 18 +
> tools/libxl/libxl_osdeps.h | 13 +
> tools/libxl/libxl_pvusb.c | 1451
> ++++++++++++++++++++++++++++++++++
> tools/libxl/libxl_types.idl | 57 ++
> tools/libxl/libxl_types_internal.idl | 1 +
> tools/libxl/libxl_utils.c | 16 +
> tools/libxl/libxl_utils.h | 5 +
> 11 files changed, 1693 insertions(+), 2 deletions(-)
> create mode 100644 tools/libxl/libxl_pvusb.c
>
> diff --git a/tools/libxl/Makefile b/tools/libxl/Makefile
> index c5ecec1..ef9ccd3 100644
> --- a/tools/libxl/Makefile
> +++ b/tools/libxl/Makefile
> @@ -103,7 +103,7 @@ LIBXL_OBJS = flexarray.o libxl.o libxl_create.o
> libxl_dm.o libxl_pci.o \
> libxl_stream_read.o libxl_stream_write.o \
> libxl_save_callout.o _libxl_save_msgs_callout.o \
> libxl_qmp.o libxl_event.o libxl_fork.o \
> - libxl_dom_suspend.o $(LIBXL_OBJS-y)
> + libxl_dom_suspend.o libxl_pvusb.o $(LIBXL_OBJS-y)
> LIBXL_OBJS += libxl_genid.o
> LIBXL_OBJS += _libxl_types.o libxl_flask.o _libxl_types_internal.o
>
> diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
> index dacfaae..a050e8b 100644
> --- a/tools/libxl/libxl.c
> +++ b/tools/libxl/libxl.c
> @@ -4218,11 +4218,54 @@ DEFINE_DEVICE_REMOVE(vtpm, destroy, 1)
>
>
> /****************************************************************************
> **/
>
> +/* Macro for defining device remove/destroy functions for usbctrl */
> +/* Follo:wing functions are defined:
> + * libxl_device_usbctrl_remove
> + * libxl_device_usbctrl_destroy
> + */
> +
> +#define DEFINE_DEVICE_REMOVE_EXT(type, removedestroy, f) \
> + int libxl_device_##type##_##removedestroy(libxl_ctx *ctx, \
> + uint32_t domid, libxl_device_##type *type, \
> + const libxl_asyncop_how *ao_how) \
> + { \
> + AO_CREATE(ctx, domid, ao_how); \
> + libxl__device *device; \
> + libxl__ao_device *aodev; \
> + int rc; \
> + \
> + GCNEW(device); \
> + rc = libxl__device_from_##type(gc, domid, type, device); \
> + if (rc != 0) goto out; \
> + \
> + GCNEW(aodev); \
> + libxl__prepare_ao_device(ao, aodev); \
> + aodev->action = LIBXL__DEVICE_ACTION_REMOVE; \
> + aodev->dev = device; \
> + aodev->callback = device_addrm_aocomplete; \
> + aodev->force = f; \
> + libxl__initiate_device_##type##_remove(egc, aodev); \
> + \
> + out: \
> + if (rc) return AO_CREATE_FAIL(rc); \
> + return AO_INPROGRESS; \
> + }
> +
> +
> +DEFINE_DEVICE_REMOVE_EXT(usbctrl, remove, 0)
> +DEFINE_DEVICE_REMOVE_EXT(usbctrl, destroy, 1)
> +
> +#undef DEFINE_DEVICE_REMOVE_EXT
> +
> +/**************************************************************************
> ****/
> +
> /* Macro for defining device addition functions in a compact way */
> /* The following functions are defined:
> * libxl_device_disk_add
> * libxl_device_nic_add
> * libxl_device_vtpm_add
> + * libxl_device_usbctrl_add
> + * libxl_device_usb_add
> */
>
> #define DEFINE_DEVICE_ADD(type) \
> @@ -4254,6 +4297,12 @@ DEFINE_DEVICE_ADD(nic)
> /* vtpm */
> DEFINE_DEVICE_ADD(vtpm)
>
> +/* usbctrl */
> +DEFINE_DEVICE_ADD(usbctrl)
> +
> +/* usb */
> +DEFINE_DEVICE_ADD(usb)
> +
> #undef DEFINE_DEVICE_ADD
>
>
> /****************************************************************************
> **/
> @@ -6795,6 +6844,10 @@ int libxl_retrieve_domain_configuration(libxl_ctx
> *ctx, uint32_t domid,
>
> MERGE(pci, pcidevs, COMPARE_PCI, {});
>
> + MERGE(usbctrl, usbctrls, COMPARE_USBCTRL, {});
> +
> + MERGE(usb, usbs, COMPARE_USB, {});
> +
> /* Take care of removable device. We maintain invariant in the
> * insert / remove operation so that:
> * 1. if xenstore is "empty" while JSON is not, the result
> diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
> index 615b1de..594e23d 100644
> --- a/tools/libxl/libxl.h
> +++ b/tools/libxl/libxl.h
> @@ -123,6 +123,12 @@
> #define LIBXL_HAVE_DOMAIN_NODEAFFINITY 1
>
> /*
> + * LIBXL_HAVE_PVUSB indicates functions for plugging in USB devices
> + * through pvusb -- both hotplug and at domain creation time..
> + */
> +#define LIBXL_HAVE_PVUSB 1
> +
> +/*
> * LIBXL_HAVE_BUILDINFO_HVM_VENDOR_DEVICE indicates that the
> * libxl_vendor_device field is present in the hvm sections of
> * libxl_domain_build_info. This field tells libxl which
> @@ -1411,6 +1417,74 @@ int libxl_cdrom_insert(libxl_ctx *ctx, uint32_t domid,
>
> libxl_device_disk *disk,
> const libxl_asyncop_how *ao_how)
> LIBXL_EXTERNAL_CALLERS_ONLY;
>
> +/*
> + * USB
> + *
> + * For each device removed or added, one of these protocols is available:
> + * - PV (i.e., PVUSB)
> + * - DEVICEMODEL (i.e, qemu)
> + *
> + * PV is available for either PV or HVM domains. DEVICEMODEL is only
> + * available for HVM domains. The caller can additionally specify
> + * "AUTO", in which case the library will try to determine the best
> + * protocol automatically.
> + *
> + * At the moment, the only protocol implemented is PV.
> + *
> + * One can add/remove USB controllers to/from guest, and attach/detach USB
> + * devices to/from USB controllers.
> + *
> + * To add USB controllers and USB devices, one can adding USB controllers
> + * first and then attaching USB devices to some USB controller, or adding
> + * USB devices to guest directly, it will automatically create a USB
> + * controller for USB devices to attach.
> + *
> + * To remove USB controllers or USB devices, one can remove USB devices
> + * under USB controller one by one and then remove USB controller, or
> + * remove USB controller directly, it will remove all USB devices under
> + * it automatically.
> + *
> + */
> +/* USB Controllers*/
> +int libxl_device_usbctrl_add(libxl_ctx *ctx, uint32_t domid,
> + libxl_device_usbctrl *usbctrl,
> + const libxl_asyncop_how *ao_how)
> + LIBXL_EXTERNAL_CALLERS_ONLY;
> +
> +int libxl_device_usbctrl_remove(libxl_ctx *ctx, uint32_t domid,
> + libxl_device_usbctrl *usbctrl,
> + const libxl_asyncop_how *ao_how)
> + LIBXL_EXTERNAL_CALLERS_ONLY;
> +
> +int libxl_device_usbctrl_destroy(libxl_ctx *ctx, uint32_t domid,
> + libxl_device_usbctrl *usbctrl,
> + const libxl_asyncop_how *ao_how)
> + LIBXL_EXTERNAL_CALLERS_ONLY;
> +
> +libxl_device_usbctrl *libxl_device_usbctrl_list(libxl_ctx *ctx,
> + uint32_t domid, int *num);
> +
> +void libxl_device_usbctrl_list_free(libxl_device_usbctrl *list, int nr);
> +
> +
> +int libxl_device_usbctrl_getinfo(libxl_ctx *ctx, uint32_t domid,
> + libxl_device_usbctrl *usbctrl,
> + libxl_usbctrlinfo *usbctrlinfo);
> +
> +/* USB Devices */
> +int libxl_device_usb_add(libxl_ctx *ctx, uint32_t domid, libxl_device_usb
> *usb,
> + const libxl_asyncop_how *ao_how)
> + LIBXL_EXTERNAL_CALLERS_ONLY;
> +
> +int libxl_device_usb_remove(libxl_ctx *ctx, uint32_t domid,
> libxl_device_usb *usb,
> + const libxl_asyncop_how *ao_how)
> + LIBXL_EXTERNAL_CALLERS_ONLY;
> +
> +libxl_device_usb *
> +libxl_device_usb_list(libxl_ctx *ctx, uint32_t domid, int *num);
> +
> +void libxl_device_usb_list_free(libxl_device_usb *list, int nr);
> +
> /* Network Interfaces */
> int libxl_device_nic_add(libxl_ctx *ctx, uint32_t domid, libxl_device_nic
> *nic,
> const libxl_asyncop_how *ao_how)
> diff --git a/tools/libxl/libxl_device.c b/tools/libxl/libxl_device.c
> index 8bb5e93..6715c16 100644
> --- a/tools/libxl/libxl_device.c
> +++ b/tools/libxl/libxl_device.c
> @@ -676,7 +676,10 @@ void libxl__devices_destroy(libxl__egc *egc,
> libxl__devices_remove_state *drs)
> aodev->action = LIBXL__DEVICE_ACTION_REMOVE;
> aodev->dev = dev;
> aodev->force = drs->force;
> - libxl__initiate_device_remove(egc, aodev);
> + if (dev->backend_kind == LIBXL__DEVICE_KIND_VUSB)
> + libxl__initiate_device_usbctrl_remove(egc, aodev);
> + else
> + libxl__initiate_device_remove(egc, aodev);
> }
> }
> }
> diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
> index a3a5cc1..1aa0aaf 100644
> --- a/tools/libxl/libxl_internal.h
> +++ b/tools/libxl/libxl_internal.h
> @@ -2569,6 +2569,14 @@ _hidden void libxl__device_vtpm_add(libxl__egc *egc,
> uint32_t domid,
> libxl_device_vtpm *vtpm,
> libxl__ao_device *aodev);
>
> +_hidden void libxl__device_usbctrl_add(libxl__egc *egc, uint32_t domid,
> + libxl_device_usbctrl *usbctrl,
> + libxl__ao_device *aodev);
> +
> +_hidden void libxl__device_usb_add(libxl__egc *egc, uint32_t domid,
> + libxl_device_usb *usb,
> + libxl__ao_device *aodev);
> +
> /* Internal function to connect a vkb device */
> _hidden int libxl__device_vkb_add(libxl__gc *gc, uint32_t domid,
> libxl_device_vkb *vkb);
> @@ -2601,6 +2609,13 @@ _hidden void
> libxl__wait_device_connection(libxl__egc*,
> _hidden void libxl__initiate_device_remove(libxl__egc *egc,
> libxl__ao_device *aodev);
>
> +_hidden int libxl__device_from_usbctrl(libxl__gc *gc, uint32_t domid,
> + libxl_device_usbctrl *usbctrl,
> + libxl__device *device);
> +
> +_hidden void libxl__initiate_device_usbctrl_remove(libxl__egc *egc,
> + libxl__ao_device
> *aodev);
> +
> /*
> * libxl__get_hotplug_script_info returns the args and env that should
> * be passed to the hotplug script for the requested device.
> @@ -3958,6 +3973,9 @@ static inline void libxl__update_config_vtpm(libxl__gc
> *gc,
> #define COMPARE_PCI(a, b) ((a)->func == (b)->func && \
> (a)->bus == (b)->bus && \
> (a)->dev == (b)->dev)
> +#define COMPARE_USB(a, b) ((a)->ctrl == (b)->ctrl && \
> + (a)->port == (b)->port)
> +#define COMPARE_USBCTRL(a, b) ((a)->devid == (b)->devid)
>
> /* DEVICE_ADD
> *
> diff --git a/tools/libxl/libxl_osdeps.h b/tools/libxl/libxl_osdeps.h
> index d9661c9..802c762 100644
> --- a/tools/libxl/libxl_osdeps.h
> +++ b/tools/libxl/libxl_osdeps.h
> @@ -24,6 +24,8 @@
> #define _GNU_SOURCE
>
> #if defined(__NetBSD__)
> +#define SYSFS_USB_DEV "/sys/bus/usb/devices"
> +#define SYSFS_USBBACK_DRIVER "/kern/xen/usb"
> #define SYSFS_PCI_DEV "/sys/bus/pci/devices"
> #define SYSFS_PCIBACK_DRIVER "/kern/xen/pci"
> #define NETBACK_NIC_NAME "xvif%ui%d"
> @@ -31,6 +33,8 @@
> #elif defined(__OpenBSD__)
> #include <util.h>
> #elif defined(__linux__)
> +#define SYSFS_USB_DEV "/sys/bus/usb/devices"
> +#define SYSFS_USBBACK_DRIVER "/sys/bus/usb/drivers/usbback"
> #define SYSFS_PCI_DEV "/sys/bus/pci/devices"
> #define SYSFS_PCIBACK_DRIVER "/sys/bus/pci/drivers/pciback"
> #define NETBACK_NIC_NAME "vif%u.%d"
> @@ -38,6 +42,8 @@
> #elif defined(__sun__)
> #include <stropts.h>
> #elif defined(__FreeBSD__)
> +#define SYSFS_USB_DEV "/dev/null"
> +#define SYSFS_USBBACK_DRIVER "/dev/null"
> #define SYSFS_PCI_DEV "/dev/null"
> #define SYSFS_PCIBACK_DRIVER "/dev/null"
> #define NETBACK_NIC_NAME "xnb%u.%d"
> @@ -45,6 +51,13 @@
> #include <sys/endian.h>
> #endif
>
> +#ifndef SYSFS_USBBACK_DRIVER
> +#error define SYSFS_USBBACK_DRIVER for your platform
> +#endif
> +#ifndef SYSFS_USB_DEV
> +#error define SYSFS_USB_DEV for your platform
> +#endif
> +
> #ifndef SYSFS_PCIBACK_DRIVER
> #error define SYSFS_PCIBACK_DRIVER for your platform
> #endif
> diff --git a/tools/libxl/libxl_pvusb.c b/tools/libxl/libxl_pvusb.c
> new file mode 100644
> index 0000000..aa1a653
> --- /dev/null
> +++ b/tools/libxl/libxl_pvusb.c
> @@ -0,0 +1,1451 @@
> +/*
> + * Copyright (C) 2015 SUSE LINUX Products GmbH, Nuernberg, Germany.
> + * Author Chunyan Liu <cyliu@xxxxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU Lesser General Public License as published
> + * by the Free Software Foundation; version 2.1 only. with the special
> + * exception on linking described in file LICENSE.
> + *
> + * 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 Lesser General Public License for more details.
> + */
> +
> +#include "libxl_osdeps.h" /* must come before any other headers */
> +
> +#include "libxl_internal.h"
> +#include <inttypes.h>
> +
> +#define USBBACK_INFO_PATH "/libxl/usbback"
> +
> +#define USBHUB_CLASS_CODE 9
> +
> +static int libxl__device_usbctrl_setdefault(libxl__gc *gc, uint32_t domid,
> + libxl_device_usbctrl *usbctrl)
> +{
> + int rc;
> + libxl_domain_type domtype = libxl__domain_type(gc, domid);
> +
> + if (!usbctrl->version)
> + usbctrl->version = 2;
> +
> + if (!usbctrl->ports)
> + usbctrl->ports = 8;
> +
> + if (usbctrl->type == LIBXL_USBCTRL_TYPE_AUTO) {
> + if (domtype == LIBXL_DOMAIN_TYPE_PV) {
> + usbctrl->type = LIBXL_USBCTRL_TYPE_PV;
> + } else if (domtype == LIBXL_DOMAIN_TYPE_HVM) {
> + /* FIXME: See if we can detect PV frontend */
> + usbctrl->type = LIBXL_USBCTRL_TYPE_DEVICEMODEL;
> + }
> + }
> +
> + rc = libxl__resolve_domid(gc, usbctrl->backend_domname,
> + &usbctrl->backend_domid);
> + return rc;
> +}
> +
> +int libxl__device_from_usbctrl(libxl__gc *gc, uint32_t domid,
> + libxl_device_usbctrl *usbctrl,
> + libxl__device *device)
> +{
> + device->backend_devid = usbctrl->devid;
> + device->backend_domid = usbctrl->backend_domid;
> + device->backend_kind = LIBXL__DEVICE_KIND_VUSB;
> + device->devid = usbctrl->devid;
> + device->domid = domid;
> + device->kind = LIBXL__DEVICE_KIND_VUSB;
> +
> + return 0;
> +}
> +
> +/* Add usbctrl information to xenstore.
> + *
> + * Adding a usb controller will add a new 'vusb' device in xenstore, and
> + * add corresponding frontend, backend information to it. According to
> + * "update_json", decide wether to update json config file.
> + */
> +static int libxl__device_usbctrl_add_xenstore(libxl__gc *gc, uint32_t
> domid,
> + libxl_device_usbctrl
> *usbctrl,
> + bool update_json)
> +{
> + libxl__device *device;
> + flexarray_t *front;
> + flexarray_t *back;
> + xs_transaction_t t = XBT_NULL;
> + int i, rc;
> + libxl_domain_config d_config;
> + libxl_device_usbctrl usbctrl_saved;
> + libxl__domain_userdata_lock *lock = NULL;
> +
> + libxl_domain_config_init(&d_config);
> + libxl_device_usbctrl_init(&usbctrl_saved);
> + libxl_device_usbctrl_copy(CTX, &usbctrl_saved, usbctrl);
> +
> + GCNEW(device);
> + rc = libxl__device_from_usbctrl(gc, domid, usbctrl, device);
> + if (rc) goto out;
> +
> + front = flexarray_make(gc, 4, 1);
> + back = flexarray_make(gc, 12, 1);
> +
> + flexarray_append_pair(back, "frontend-id", GCSPRINTF("%d", domid));
> + flexarray_append_pair(back, "online", "1");
> + flexarray_append_pair(back, "state", "1");
> + flexarray_append_pair(back, "type",
> + (char *)libxl_usbctrl_type_to_string(usbctrl->type));
> + flexarray_append_pair(back, "usb-ver", GCSPRINTF("%d",
> usbctrl->version));
> + flexarray_append_pair(back, "num-ports", GCSPRINTF("%d",
> usbctrl->ports));
> + flexarray_append_pair(back, "port", "");
> + for (i = 0; i < usbctrl->ports; i++)
> + flexarray_append_pair(back, GCSPRINTF("port/%d", i + 1), "");
> +
> + flexarray_append_pair(front, "backend-id",
> + GCSPRINTF("%d", usbctrl->backend_domid));
> + flexarray_append_pair(front, "state", "1");
> +
> + if (update_json) {
> + lock = libxl__lock_domain_userdata(gc, domid);
> + if (!lock) {
> + rc = ERROR_LOCK_FAIL;
> + goto out;
> + }
> +
> + rc = libxl__get_domain_configuration(gc, domid, &d_config);
> + if (rc) goto out;
> +
> + DEVICE_ADD(usbctrl, usbctrls, domid, &usbctrl_saved,
> + COMPARE_USBCTRL, &d_config);
> + }
> +
> + for (;;) {
> + rc = libxl__xs_transaction_start(gc, &t);
> + if (rc) goto out;
> +
> + rc = libxl__device_exists(gc, t, device);
> + if (rc < 0) goto out;
> + if (rc == 1) {
> + /* already exists in xenstore */
> + LOG(ERROR, "device already exists in xenstore");
> + rc = ERROR_DEVICE_EXISTS;
> + goto out;
> + }
> +
> + if (update_json) {
> + rc = libxl__set_domain_configuration(gc, domid, &d_config);
> + if (rc) goto out;
> + }
> +
> + libxl__device_generic_add(gc, t, device,
> + libxl__xs_kvs_of_flexarray(gc, back, back->count),
> + libxl__xs_kvs_of_flexarray(gc, front,
> front->count),
> + NULL);
> +
> + rc = libxl__xs_transaction_commit(gc, &t);
> + if (!rc) break;
> + if (rc < 0) goto out;
> + }
> +
> +out:
> + libxl__xs_transaction_abort(gc, &t);
> + if (lock) libxl__unlock_domain_userdata(lock);
> + libxl_device_usbctrl_dispose(&usbctrl_saved);
> + libxl_domain_config_dispose(&d_config);
> + return rc;
> +}
> +
> +/* AO operation to add a usb controller.
> + *
> + * Generally, it does:
> + * 1) fill in necessary usb controler information with default value
> + * 2) write usb controller frontend/backend info to xenstore, update json
> + * config file if necessary.
> + * 3) wait for device connection. PVUSB frontend and backend driver will
> + * probe xenstore paths and build connection between frontend and
> backend.
> + *
> + * Before calling this function, aodev should be properly filled:
> + * aodev->ao, aodev->callback, aodev->update_json, ...
> + */
> +void libxl__device_usbctrl_add(libxl__egc *egc, uint32_t domid,
> + libxl_device_usbctrl *usbctrl,
> + libxl__ao_device *aodev)
> +{
> + STATE_AO_GC(aodev->ao);
> + libxl__device *device;
> + int rc;
> +
> + rc = libxl__device_usbctrl_setdefault(gc, domid, usbctrl);
> + if (rc < 0) goto out;
> +
> + if (usbctrl->devid == -1) {
> + usbctrl->devid = libxl__device_nextid(gc, domid, "vusb");
> + if (usbctrl->devid < 0) {
> + rc = ERROR_FAIL;
> + goto out;
> + }
> + }
> +
> + if (usbctrl->type != LIBXL_USBCTRL_TYPE_PV) {
> + LOG(ERROR, "Unsupported USB controller type");
> + rc = ERROR_FAIL;
> + goto out;
> + }
> +
> + rc = libxl__device_usbctrl_add_xenstore(gc, domid, usbctrl,
> + aodev->update_json);
> + if (rc) goto out;
> +
> + GCNEW(device);
> + rc = libxl__device_from_usbctrl(gc, domid, usbctrl, device);
> + if (rc) goto out;
> +
> + aodev->dev = device;
> + aodev->action = LIBXL__DEVICE_ACTION_ADD;
> + libxl__wait_device_connection(egc, aodev);
> + return;
> +
> +out:
> + aodev->rc = rc;
> + if (rc) aodev->callback(egc, aodev);
> + return;
> +}
> +
> +static int
> +libxl__device_usb_list_for_usbctrl(libxl__gc *gc, uint32_t domid,
> + libxl_devid usbctrl,
> + libxl_device_usb **usbs, int *num);
> +
> +static int
> +libxl__device_usb_remove(libxl__gc *gc, uint32_t domid, libxl_device_usb
> *usb);
> +
> +/* AO function to remove a usb controller.
> + *
> + * Generally, it does:
> + * 1) check if the usb controller exists or not
> + * 2) remove all usb devices under controller
> + * 3) remove usb controller information from xenstore
> + *
> + * Before calling this function, aodev should be properly filled:
> + * aodev->ao, aodev->dev, aodev->callback, ...
> + */
> +void libxl__initiate_device_usbctrl_remove(libxl__egc *egc,
> + libxl__ao_device *aodev)
> +{
> + STATE_AO_GC(aodev->ao);
> + libxl_ctx *ctx = CTX;
> + libxl_device_usb *usbs = NULL;
> + int numusb = 0;
> + int i, rc;
> + uint32_t domid = ao->domid;
> + int usbctrl_devid = aodev->dev->devid;
> + libxl_device_usbctrl usbctrl;
> + libxl_usbctrlinfo usbctrlinfo;
> +
> + libxl_device_usbctrl_init(&usbctrl);
> + libxl_usbctrlinfo_init(&usbctrlinfo);
> + usbctrl.devid = usbctrl_devid;
> +
> + rc = libxl_device_usbctrl_getinfo(ctx, domid, &usbctrl, &usbctrlinfo);
> + if (rc) goto out;
> +
> + if (usbctrlinfo.type != LIBXL_USBCTRL_TYPE_PV) {
> + LOG(ERROR, "Unsupported USB controller type");
> + rc = ERROR_FAIL;
> + goto out;
> + }
> +
> + /* Remove usb devices first */
> + rc = libxl__device_usb_list_for_usbctrl(gc, domid, usbctrl_devid,
> + &usbs, &numusb);
> + if (rc) goto out;
> +
> + for (i = 0; i < numusb; i++) {
> + if (libxl__device_usb_remove(gc, domid, &usbs[i])) {
> + LOG(ERROR, "libxl__device_usb_remove failed");
> + rc = ERROR_FAIL;
> + goto out;
> + }
> + }
> +
> + libxl_device_usbctrl_dispose(&usbctrl);
> + libxl_usbctrlinfo_dispose(&usbctrlinfo);
> +
> + /* Remove usbctrl */
> + return libxl__initiate_device_remove(egc, aodev);
> +
> +out:
> + libxl_device_usbctrl_dispose(&usbctrl);
> + libxl_usbctrlinfo_dispose(&usbctrlinfo);
> + aodev->rc = rc;
> + if (rc) aodev->callback(egc, aodev);
> + return;
> +}
> +
> +libxl_device_usbctrl *
> +libxl_device_usbctrl_list(libxl_ctx *ctx, uint32_t domid, int *num)
> +{
> + GC_INIT(ctx);
> + libxl_device_usbctrl *usbctrls = NULL;
> + char *path = NULL;
> + char **entry = NULL;
> + unsigned int nentries = 0;
> +
> + *num = 0;
> +
> + path = GCSPRINTF("%s/device/vusb",
> + libxl__xs_get_dompath(gc, domid));
> + entry = libxl__xs_directory(gc, XBT_NULL, path, &nentries);
> +
> + if (entry && nentries) {
> + usbctrls = libxl__zalloc(NOGC, sizeof(*usbctrls) * nentries);
> + libxl_device_usbctrl *usbctrl;
> + libxl_device_usbctrl *end = usbctrls + nentries;
> + for (usbctrl = usbctrls; usbctrl < end;
> + usbctrl++, entry++, (*num)++) {
> + const char *tmp, *be_path;
> + int rc;
> + const char *fe_path = GCSPRINTF("%s/%s", path, *entry);
> +
> + libxl_device_usbctrl_init(usbctrl);
> + usbctrl->devid = atoi(*entry);
> +
> +#define READ_SUBPATH(path, subpath) ({ \
> + rc = libxl__xs_read_checked(gc, XBT_NULL, \
> + GCSPRINTF("%s/" subpath, path), \
> + &tmp); \
> + if (rc) goto outerr; \
> + (char *)tmp; \
> + })
> + be_path = READ_SUBPATH(fe_path, "backend");
> + usbctrl->backend_domid = atoi(READ_SUBPATH(fe_path,
> "backend-id"));
> + usbctrl->version = atoi(READ_SUBPATH(be_path, "usb-ver"));
> + usbctrl->ports = atoi(READ_SUBPATH(be_path, "num-ports"));
> + libxl_usbctrl_type_from_string(READ_SUBPATH(be_path, "type"),
> + &usbctrl->type);
> +#undef READ_SUBPATH
> + }
> + }
> +
> + goto out;
> +
> +outerr:
> + LOG(ERROR, "Unable to list USB Controllers");
> + libxl_device_usbctrl_list_free(usbctrls, *num);
> + *num = 0;
> + usbctrls = NULL;
> +
> +out:
> + GC_FREE;
> + return usbctrls;
> +}
> +
> +int libxl_device_usbctrl_getinfo(libxl_ctx *ctx, uint32_t domid,
> + libxl_device_usbctrl *usbctrl,
> + libxl_usbctrlinfo *usbctrlinfo)
> +{
> + GC_INIT(ctx);
> + const char *dompath, *fe_path, *be_path, *tmp;
> + int rc;
> +
> + usbctrlinfo->devid = usbctrl->devid;
> +
> +#define READ_SUBPATH(path, subpath) ({ \
> + rc = libxl__xs_read_checked(gc, XBT_NULL, \
> + GCSPRINTF("%s/" subpath, path), \
> + &tmp); \
> + if (rc) goto out; \
> + (char *)tmp; \
> + })
> +
> + dompath = libxl__xs_get_dompath(gc, domid);
> + fe_path = GCSPRINTF("%s/device/vusb/%d", dompath, usbctrl->devid);
> + be_path = READ_SUBPATH(fe_path, "backend");
> +
> + usbctrlinfo->backend = libxl__strdup(NOGC, be_path);
> +
> + tmp = READ_SUBPATH(fe_path, "backend-id");
> + usbctrlinfo->backend_id = tmp ? strtoul(tmp, NULL, 10) : -1;
> + tmp = READ_SUBPATH(fe_path, "state");
> + usbctrlinfo->state = tmp ? strtoul(tmp, NULL, 10) : -1;
> + tmp = READ_SUBPATH(fe_path, "event-channel");
> + usbctrlinfo->evtch = tmp ? strtoul(tmp, NULL, 10) : -1;
> + tmp = READ_SUBPATH(fe_path, "urb-ring-ref");
> + usbctrlinfo->ref_urb = tmp ? strtoul(tmp, NULL, 10) : -1;
> + tmp = READ_SUBPATH(fe_path, "conn-ring-ref");
> + usbctrlinfo->ref_conn = tmp ? strtoul(tmp, NULL, 10) : -1;
> + tmp = READ_SUBPATH(be_path, "frontend");
> + usbctrlinfo->frontend = libxl__strdup(NOGC, tmp);
> + tmp = READ_SUBPATH(be_path, "frontend-id");
> + usbctrlinfo->frontend_id = tmp ? strtoul(tmp, NULL, 10) : -1;
> + tmp = READ_SUBPATH(be_path, "num-ports");
> + usbctrlinfo->ports = tmp ? strtoul(tmp, NULL, 10) : -1;
> + tmp = READ_SUBPATH(be_path, "usb-ver");
> + usbctrlinfo->version = tmp ? strtoul(tmp, NULL, 10) : -1;
> + tmp = READ_SUBPATH(be_path, "type");
> + libxl_usbctrl_type_from_string(tmp, &usbctrlinfo->type);
> +
> +#undef READ_SUBPATH
> +
> + rc = 0;
> +
> +out:
> + GC_FREE;
> + return rc;
> +}
> +
> +int libxl_devid_to_device_usbctrl(libxl_ctx *ctx,
> + uint32_t domid,
> + int devid,
> + libxl_device_usbctrl *usbctrl)
> +{
> + libxl_device_usbctrl *usbctrls;
> + int nb = 0;
> + int i, rc;
> +
> + usbctrls = libxl_device_usbctrl_list(ctx, domid, &nb);
> + if (!usbctrls)
> + return ERROR_FAIL;
> +
> + rc = ERROR_FAIL;
> + for (i = 0; i < nb; i++) {
> + if (devid == usbctrls[i].devid) {
> + libxl_device_usbctrl_copy(ctx, usbctrl, &usbctrls[i]);
> + rc = 0;
> + break;
> + }
> + }
> +
> + libxl_device_usbctrl_list_free(usbctrls, nb);
> + return rc;
> +}
> +
> +static char *usb_busaddr_to_busid(libxl__gc *gc, int bus, int addr)
> +{
> + struct dirent *de;
> + DIR *dir;
> + char *busid = NULL;
> +
> + /* invalid hostbus or hostaddr */
> + if (bus < 1 || addr < 1)
> + return NULL;
> +
> + if (!(dir = opendir(SYSFS_USB_DEV)))
> + return NULL;
> +
> + while ((de = readdir(dir))) {
> + char *filename;
> + void *buf;
> + int busnum = -1;
> + int devnum = -1;
> +
> + if (!de->d_name)
> + continue;
> +
> + filename = GCSPRINTF(SYSFS_USB_DEV"/%s/devnum", de->d_name);
> + if (!libxl__read_sysfs_file_contents(gc, filename, &buf, NULL))
> + devnum = atoi((char *)buf);
> +
> + filename = GCSPRINTF(SYSFS_USB_DEV"/%s/busnum", de->d_name);
> + if (!libxl__read_sysfs_file_contents(gc, filename, &buf, NULL))
> + busnum = atoi((char *)buf);
> +
> + if (bus == busnum && addr == devnum) {
> + busid = libxl__strdup(gc, de->d_name);
> + break;
> + }
> + }
> +
> + closedir(dir);
> + return busid;
> +}
> +
> +static int usb_busaddr_from_busid(libxl__gc *gc, const char *busid,
> + uint8_t *bus, uint8_t *addr)
> +{
> + char *filename;
> + void *buf;
> +
> + filename = GCSPRINTF(SYSFS_USB_DEV"/%s/busnum", busid);
> + if (!libxl__read_sysfs_file_contents(gc, filename, &buf, NULL))
> + *bus = atoi((char *)buf);
> + else
> + return ERROR_FAIL;
> +
> + filename = GCSPRINTF(SYSFS_USB_DEV"/%s/devnum", busid);
> + if (!libxl__read_sysfs_file_contents(gc, filename, &buf, NULL))
> + *addr = atoi((char *)buf);
> + else
> + return ERROR_FAIL;
> +
> + return 0;
> +}
> +
> +static int
> +get_assigned_devices(libxl__gc *gc,
> + libxl_device_usb **list, int *num)
> +{
> + char **domlist;
> + unsigned int nd = 0, i, j, k;
> + int rc;
> +
> + *list = NULL;
> + *num = 0;
> +
> + domlist = libxl__xs_directory(gc, XBT_NULL, "/local/domain", &nd);
> + for (i = 0; i < nd; i++) {
> + char *path, **ctrl_list;
> + unsigned int nc = 0;
> +
> + path = GCSPRINTF("/local/domain/%s/device/vusb", domlist[i]);
> + ctrl_list = libxl__xs_directory(gc, XBT_NULL, path, &nc);
> +
> + for (j = 0; j < nc; j++) {
> + const char *be_path, *num_ports;
> + int nport;
> +
> + rc = libxl__xs_read_checked(gc, XBT_NULL,
> + GCSPRINTF("%s/%s/backend", path, ctrl_list[j]),
> + &be_path);
> + if (rc) goto out;
> +
> + rc = libxl__xs_read_checked(gc, XBT_NULL,
> + GCSPRINTF("%s/num-ports", be_path),
> + &num_ports);
> + if (rc) goto out;
> +
> + nport = atoi(num_ports);
> + for (k = 0; k < nport; k++) {
> + libxl_device_usb *usb;
> + const char *portpath, *busid;
> +
> + portpath = GCSPRINTF("%s/port/%d", be_path, k + 1);
> + busid = libxl__xs_read(gc, XBT_NULL, portpath);
> + /* If there is USB device attached, add it to list */
> + if (busid && strcmp(busid, "")) {
> + GCREALLOC_ARRAY(*list, *num + 1);
> + usb = *list + *num;
> + (*num)++;
> + libxl_device_usb_init(usb);
> + usb->ctrl = atoi(ctrl_list[j]);
> + usb->port = k + 1;
> + rc = usb_busaddr_from_busid(gc, busid,
> + &usb->u.hostdev.hostbus,
> + &usb->u.hostdev.hostaddr);
> + if (rc) goto out;
> + }
> + }
> + }
> + }
> +
> + rc = 0;
> +
> +out:
> + if (rc) {
> + *list = NULL;
> + *num = 0;
> + }
> + return rc;
> +}
> +
> +static bool is_usbdev_in_array(libxl_device_usb *usbs, int num,
> + libxl_device_usb *usb)
> +{
> + int i;
> +
> + for (i = 0; i < num; i++) {
> + if (usbs[i].u.hostdev.hostbus == usb->u.hostdev.hostbus &&
> + usbs[i].u.hostdev.hostaddr == usb->u.hostdev.hostaddr)
> + return true;
> + }
> +
> + return false;
> +}
> +
> +/* check if USB device is already assigned to a domain */
> +/* check if USB device type is assignable */
> +static bool is_usb_assignable(libxl__gc *gc, libxl_device_usb *usb)
> +{
> + int classcode;
> + char *filename;
> + void *buf = NULL;
> + char *busid = NULL;
> +
> + busid = usb_busaddr_to_busid(gc, usb->u.hostdev.hostbus,
> + usb->u.hostdev.hostaddr);
> + if (!busid) return false;
> +
> + filename = GCSPRINTF(SYSFS_USB_DEV"/%s/bDeviceClass", busid);
> + if (libxl__read_sysfs_file_contents(gc, filename, &buf, NULL))
> + return false;
> +
> + classcode = atoi(buf);
> + return classcode != USBHUB_CLASS_CODE;
> +}
> +
> +/* get usb devices under certain usb controller */
> +static int
> +libxl__device_usb_list_for_usbctrl(libxl__gc *gc, uint32_t domid,
> + libxl_devid usbctrl,
> + libxl_device_usb **usbs, int *num)
> +{
> + const char *fe_path, *be_path, *num_devs;
> + int n, i, rc;
> +
> + *usbs = NULL;
> + *num = 0;
> +
> + fe_path = GCSPRINTF("%s/device/vusb/%d",
> + libxl__xs_get_dompath(gc, domid), usbctrl);
> +
> + rc = libxl__xs_read_checked(gc, XBT_NULL,
> + GCSPRINTF("%s/backend", fe_path),
> + &be_path);
> + if (rc) return rc;
> +
> + rc = libxl__xs_read_checked(gc, XBT_NULL,
> + GCSPRINTF("%s/num-ports", be_path),
> + &num_devs);
> + if (rc) return rc;
> +
> + n = atoi(num_devs);
> +
> + for (i = 0; i < n; i++) {
> + char *busid;
> + libxl_device_usb *usb;
> +
> + busid = libxl__xs_read(gc, XBT_NULL,
> + GCSPRINTF("%s/port/%d", be_path, i + 1));
> + if (busid && strcmp(busid, "")) {
> + GCREALLOC_ARRAY(*usbs, *num + 1);
> + usb = *usbs + *num;
> + (*num)++;
> + libxl_device_usb_init(usb);
> + usb->ctrl = usbctrl;
> + usb->port = i + 1;
> + rc = usb_busaddr_from_busid(gc, busid,
> + &usb->u.hostdev.hostbus,
> + &usb->u.hostdev.hostaddr);
> + if (rc) goto out;
> + }
> + }
> +
> + rc = 0;
> +
> +out:
> + if (rc) {
> + *usbs = NULL;
> + *num = 0;
> + }
> + return rc;
> +}
> +
> +/* get all usb devices of the domain */
> +libxl_device_usb *
> +libxl_device_usb_list(libxl_ctx *ctx, uint32_t domid, int *num)
> +{
> + GC_INIT(ctx);
> + char *path;
> + char **usbctrls;
> + unsigned int nc = 0;
> + int i, j;
> + libxl_device_usb *usbs = NULL;
> +
> + *num = 0;
> +
> + path = GCSPRINTF("%s/device/vusb",
> + libxl__xs_get_dompath(gc, domid));
> + usbctrls = libxl__xs_directory(gc, XBT_NULL, path, &nc);
> +
> + for (i = 0; i < nc; i++) {
> + int nd = 0;
> + libxl_device_usb *tmp = NULL;
> + libxl__device_usb_list_for_usbctrl(gc, domid,
> + atoi(usbctrls[i]), &tmp, &nd);
> + if (!nd) continue;
> +
> + usbs = libxl__realloc(NOGC, usbs, sizeof(*usbs) * (*num + nd));
> + for (j = 0; j < nd; j++) {
> + libxl_device_usb_copy(ctx, usbs + *num, tmp + j);
> + (*num)++;
> + }
> + }
> +
> + GC_FREE;
> + return usbs;
> +}
> +
> +/* find first unused controller:port and give that to usb device */
> +static int
> +libxl__device_usb_set_default_usbctrl(libxl__gc *gc, uint32_t domid,
> + libxl_device_usb *usb)
> +{
> + libxl_ctx *ctx = CTX;
> + libxl_device_usbctrl *usbctrls = NULL;
> + int numctrl = 0;
> + int i, j, rc;
> +
> + usbctrls = libxl_device_usbctrl_list(ctx, domid, &numctrl);
> + if (!numctrl) {
> + rc = ERROR_FAIL;
> + goto out;
> + }
> +
> + rc = ERROR_FAIL;
> + for (i = 0; i < numctrl; i++) {
> + for (j = 0; j < usbctrls[i].ports; j++) {
> + char *path, *tmp;
> +
> + path = GCSPRINTF("%s/backend/vusb/%d/%d/port/%d",
> + libxl__xs_get_dompath(gc,
> LIBXL_TOOLSTACK_DOMID),
> + domid, usbctrls[i].devid, j + 1);
> + tmp = libxl__xs_read(gc, XBT_NULL, path);
> + if (tmp && !strcmp(tmp, "")) {
> + usb->ctrl = usbctrls[i].devid;
> + usb->port = j + 1;
> + rc = 0;
> + goto out;
> + }
> + }
> + }
> +
> +out:
> + libxl_device_usbctrl_list_free(usbctrls, numctrl);
> + return rc;
> +}
> +
> +/* Fill in usb information with default value.
> + *
> + * Generally, it does:
> + * 1) if "controller" is not specified:
> + * - if "port" is not specified, try to find an available
> controller:port,
> + * if found, use that; otherwise, create a new controller, use this
> + * controller and its first port
> + * - if "port" is specified, report error.
> + * 2) if "controller" is specified, but port is not specified:
> + * try to find an available port under this controller, if found, use
> + * that, otherwise, report error.
> + * 3) if both "controller" and "port" are specified:
> + * check the controller:port is available, if not, report error.
> + */
> +static int libxl__device_usb_setdefault(libxl__gc *gc, uint32_t domid,
> + libxl_device_usb *usb,
> + bool update_json)
> +{
> + int rc;
> +
> + if (!usb->devtype)
> + usb->devtype = LIBXL_USBDEV_TYPE_HOSTDEV;
> +
> + if (usb->ctrl == -1) {
> + if (usb->port) {
> + LOG(ERROR, "USB controller must be specified if you specify
> port");
> + return ERROR_INVAL;
> + }
> +
> + rc = libxl__device_usb_set_default_usbctrl(gc, domid, usb);
> + /* If no existing controller to host this usb device, add a new one
> */
> + if (rc) {
> + libxl_device_usbctrl *usbctrl;
> +
> + GCNEW(usbctrl);
> + libxl_device_usbctrl_init(usbctrl);
> + rc = libxl__device_usbctrl_setdefault(gc, domid, usbctrl);
> + if (rc < 0) goto out;
> +
> + if (usbctrl->devid == -1) {
> + usbctrl->devid = libxl__device_nextid(gc, domid, "vusb");
> + if (usbctrl->devid < 0) {
> + rc = ERROR_FAIL;
> + goto out;
> + }
> + }
> +
> + rc = libxl__device_usbctrl_add_xenstore(gc, domid, usbctrl,
> + update_json);
> + if (rc) goto out;
> +
> + usb->ctrl = usbctrl->devid;
> + usb->port = 1;
> + }
> + } else if (!usb->port) {
> + /* Valid port starts from 1. Choose port for us. */
> + int i, ports;
> + const char *fe_path, *be_path, *tmp;
> +
> + fe_path = GCSPRINTF("%s/device/vusb/%d",
> + libxl__xs_get_dompath(gc, domid), usb->ctrl);
> +
> + rc = libxl__xs_read_checked(gc, XBT_NULL,
> + GCSPRINTF("%s/backend", fe_path),
> &be_path);
> + if (rc) goto out;
> +
> + rc = libxl__xs_read_checked(gc, XBT_NULL,
> + GCSPRINTF("%s/num-ports", be_path),
> &tmp);
> + if (rc) goto out;
> +
> + ports = atoi(tmp);
> +
> + for (i = 0; i < ports; i++) {
> + tmp = libxl__xs_read(gc, XBT_NULL,
> + GCSPRINTF("%s/port/%d", be_path, i + 1));
> + if (tmp && !strcmp(tmp, "")) {
> + usb->port = i + 1;
> + break;
> + }
> + }
> +
> + if (!usb->port) {
> + LOG(ERROR, "No available port under specified controller");
> + rc = ERROR_FAIL;
> + goto out;
> + }
> + } else {
> + const char *fe_path, *be_path, *tmp;
> +
> + fe_path = GCSPRINTF("%s/device/vusb/%d",
> + libxl__xs_get_dompath(gc, domid), usb->ctrl);
> +
> + rc = libxl__xs_read_checked(gc, XBT_NULL,
> + GCSPRINTF("%s/backend", fe_path),
> &be_path);
> + if (rc) goto out;
> +
> + rc = libxl__xs_read_checked(gc, XBT_NULL,
> + GCSPRINTF("%s/port/%d", be_path,
> usb->port),
> + &tmp);
> + if (rc) goto out;
> +
> + if (strcmp(tmp, "")) {
> + LOG(ERROR, "The controller port isn't available");
> + rc = ERROR_FAIL;
> + goto out;
> + }
> + }
> +
> + rc = 0;
> +
> +out:
> + return rc;
> +}
> +
> +/* Add usb information to xenstore
> + *
> + * Adding a usb device won't create new 'vusb' device, but only write
> + * the device busid to the controller:port in xenstore.
> + */
> +static int libxl__device_usb_add_xenstore(libxl__gc *gc, uint32_t domid,
> + libxl_device_usb *usb,
> + bool update_json)
> +{
> + char *be_path;
> + char *busid;
> + int rc;
> + xs_transaction_t t = XBT_NULL;
> + libxl_domain_config d_config;
> + libxl_device_usb usb_saved;
> + libxl__domain_userdata_lock *lock = NULL;
> +
> + libxl_domain_config_init(&d_config);
> + libxl_device_usb_init(&usb_saved);
> + libxl_device_usb_copy(CTX, &usb_saved, usb);
> +
> + busid = usb_busaddr_to_busid(gc, usb->u.hostdev.hostbus,
> + usb->u.hostdev.hostaddr);
> + if (!busid) {
> + LOG(DEBUG, "Fail to get busid of usb device");
> + goto out;
> + }
> +
> + if (update_json) {
> + lock = libxl__lock_domain_userdata(gc, domid);
> + if (!lock) {
> + rc = ERROR_LOCK_FAIL;
> + goto out;
> + }
> +
> + rc = libxl__get_domain_configuration(gc, domid, &d_config);
> + if (rc) goto out;
> +
> + DEVICE_ADD(usb, usbs, domid, &usb_saved, COMPARE_USB, &d_config);
> + }
> +
> + for (;;) {
> + rc = libxl__xs_transaction_start(gc, &t);
> + if (rc) goto out;
> +
> + if (update_json) {
> + rc = libxl__set_domain_configuration(gc, domid, &d_config);
> + if (rc) goto out;
> + }
> +
> + be_path = GCSPRINTF("%s/backend/vusb/%d/%d/port/%d",
> + libxl__xs_get_dompath(gc,
> LIBXL_TOOLSTACK_DOMID),
> + domid, usb->ctrl, usb->port);
> +
> + LOG(DEBUG, "Adding new usb device to xenstore");
> + if (libxl__xs_write_checked(gc, t, be_path, busid))
> + goto out;
> +
> + rc = libxl__xs_transaction_commit(gc, &t);
> + if (!rc) break;
> + if (rc < 0) goto out;
> + }
> +
> + rc = 0;
> +
> +out:
> + if (lock) libxl__unlock_domain_userdata(lock);
> + libxl_device_usb_dispose(&usb_saved);
> + libxl_domain_config_dispose(&d_config);
> + return rc;
> +}
> +
> +static int libxl__device_usb_remove_xenstore(libxl__gc *gc, uint32_t domid,
> + libxl_device_usb *usb)
> +{
> + char *be_path;
> +
> + be_path = GCSPRINTF("%s/backend/vusb/%d/%d/port/%d",
> + libxl__xs_get_dompath(gc, LIBXL_TOOLSTACK_DOMID),
> + domid, usb->ctrl, usb->port);
> + LOG(DEBUG, "Removing USB device from xenstore");
> + if (libxl__xs_write_checked(gc, XBT_NULL, be_path, ""))
> + return ERROR_FAIL;
> +
> + return 0;
> +}
> +
> +/* bind/unbind usb device interface */
> +static int unbind_usb_intf(libxl__gc *gc, char *intf, char **drvpath)
> +{
> + char *path, *spath, *dp = NULL;
> + int fd = -1;
> + int rc;
> + struct stat st;
> +
> + spath = GCSPRINTF(SYSFS_USB_DEV"/%s/driver", intf);
> + if (!lstat(spath, &st)) {
> + /* Find the canonical path to the driver. */
> + dp = libxl__zalloc(gc, PATH_MAX);
> + dp = realpath(spath, dp);
> +
> + path = GCSPRINTF("%s/unbind", spath);
> + fd = open(path, O_WRONLY);
> + if (fd < 0)
> + return ERROR_FAIL;
> + rc = write(fd, intf, strlen(intf));
> + close(fd);
> + if (rc < 0)
> + return ERROR_FAIL;
> + }
> +
> + if (drvpath)
> + *drvpath = dp;
> +
> + return 0;
> +}
> +
> +static int bind_usb_intf(libxl__gc *gc, char *intf, char *drvpath)
> +{
> + char *path;
> + struct stat st;
> + int fd, rc;
> +
> + path = GCSPRINTF("%s/%s", drvpath, intf);
> + rc = lstat(path, &st);
> + /* already bind, return */
> + if (!rc)
> + return 0;
> +
> + path = GCSPRINTF("%s/bind", drvpath);
> + fd = open(path, O_WRONLY);
> + if (fd < 0)
> + return ERROR_FAIL;
> +
> + rc = write(fd, intf, strlen(intf));
> + close(fd);
> + if (rc < 0)
> + return ERROR_FAIL;
> +
> + return 0;
> +}
> +
> +/* Is usb interface bound to usbback? */
> +static int usb_intf_is_assigned(libxl__gc *gc, char *intf)
> +{
> + char *spath;
> + int rc;
> + struct stat st;
> +
> + spath = GCSPRINTF(SYSFS_USBBACK_DRIVER"/%s", intf);
> + rc = lstat(spath, &st);
> +
> + if (rc == 0)
> + return 1;
> + if (rc < 0 && errno == ENOENT)
> + return 0;
> + LOGE(ERROR, "Accessing %s", spath);
> + return -1;
> +}
> +
> +static int usb_get_all_interfaces(libxl__gc *gc, libxl_device_usb *usb,
> + char ***intfs, int *num)
> +{
> + DIR *dir;
> + struct dirent *entry;
> + char *buf;
> + char *busid;
> + int rc;
> +
> + *intfs = NULL;
> + *num = 0;
> +
> + busid = usb_busaddr_to_busid(gc, usb->u.hostdev.hostbus,
> + usb->u.hostdev.hostaddr);
> + if (!busid) {
> + rc = ERROR_FAIL;
> + goto out;
> + }
> +
> + buf = GCSPRINTF("%s:", busid);
> +
> + if (!(dir = opendir(SYSFS_USB_DEV))) {
> + rc = ERROR_FAIL;
> + goto out;
> + }
> +
> + while ((entry = readdir(dir)) != NULL) {
> + if (!strncmp(entry->d_name, buf, strlen(buf))) {
> + GCREALLOC_ARRAY(*intfs, *num + 1);
> + if (*intfs == NULL) {
> + rc = ERROR_FAIL;
> + goto out;
> + }
> + (*intfs)[*num] = libxl__strdup(gc, entry->d_name);
> + (*num)++;
> + }
> + }
> +
> + closedir(dir);
> + rc = 0;
> +
> +out:
> + return rc;
> +}
> +
> +/* Encode usb interface so that it could be written to xenstore as a key.
> + *
> + * Since xenstore key cannot include '.' or ':', we'll change '.' to '_',
> + * change ':' to '-'. For example, 3-1:2.1 will be encoded to 3-1-2_1.
> + * This will be used to save original driver of USB device to xenstore.
> + */
> +static char *usb_interface_xenstore_encode(char *busid)
> +{
> + char *str = strdup(busid);
> + int i, len = strlen(str);
> +
> + for (i = 0; i < len; i++) {
> + if (str[i] == '.')
> + str[i] = '_';
> + if (str[i] == ':')
> + str[i] = '-';
> + }
> + return str;
> +}
> +
> +/* Unbind USB device from "usbback" driver.
> + *
> + * If there are many interfaces under USB device, check each interface,
> + * unbind from "usbback" driver and rebind to its original driver.
> + */
> +static int usbback_dev_unassign(libxl__gc *gc, libxl_device_usb *usb)
> +{
> + char **intfs = NULL;
> + char *path;
> + int num = 0, i;
> + int rc;
> + char *busid;
> + char *usb_encode = NULL;
> +
> + if (usb_get_all_interfaces(gc, usb, &intfs, &num) < 0)
> + return ERROR_FAIL;
> +
> + busid = usb_busaddr_to_busid(gc, usb->u.hostdev.hostbus,
> + usb->u.hostdev.hostaddr);
> + usb_encode = usb_interface_xenstore_encode(busid);
> +
> + for (i = 0; i < num; i++) {
> + char *intf = intfs[i];
> + char *drvpath = NULL;
> +
> + /* check if the USB interface is already bound to "usbbcak" */
> + if (usb_intf_is_assigned(gc, intf) > 0) {
> + /* unbind interface from usbback driver */
> + if (unbind_usb_intf(gc, intf, NULL) < 0) {
> + rc = ERROR_FAIL;
> + goto out;
> + }
> + }
> +
> + /* bind interface to its originial driver */
> + drvpath = libxl__xs_read(gc, XBT_NULL,
> + GCSPRINTF(USBBACK_INFO_PATH"/%s/%s/driver_path",
> + usb_encode, usb_interface_xenstore_encode(intf)));
> + if (drvpath && bind_usb_intf(gc, intf, drvpath))
> + LOGE(WARN, "Couldn't bind %s to %s", intf, drvpath);
> + }
> +
> + /* finally, remove xs driver path */
> + path = GCSPRINTF(USBBACK_INFO_PATH"/%s", usb_encode);
> + libxl__xs_rm_checked(gc, XBT_NULL, path);
> + rc = 0;
> +
> +out:
> + free(usb_encode);
> + return rc;
> +}
> +
> +/* Bind USB device to "usbback" driver.
> + *
> + * If there are many interfaces under USB device, check each interface,
> + * unbind from original driver and bind to "usbback" driver.
> + */
> +static int usbback_dev_assign(libxl__gc *gc, libxl_device_usb *usb)
> +{
> + char **intfs = NULL;
> + int num = 0, i;
> + int rc;
> + char *busid;
> + char *usb_encode = NULL;
> +
> + if (usb_get_all_interfaces(gc, usb, &intfs, &num) < 0)
> + return ERROR_FAIL;
> +
> + busid = usb_busaddr_to_busid(gc, usb->u.hostdev.hostbus,
> + usb->u.hostdev.hostaddr);
> + usb_encode = usb_interface_xenstore_encode(busid);
> +
> + for (i = 0; i < num; i++) {
> + char *intf = intfs[i];
> + char *path = NULL;
> + char *drvpath = NULL;
> +
> + /* already assigned to usbback */
> + if (usb_intf_is_assigned(gc, intf) > 0)
> + continue;
> +
> + /* unbind interface from original driver */
> + if (unbind_usb_intf(gc, intf, &drvpath) < 0) {
> + rc = ERROR_FAIL;
> + goto out_rebind;
> + }
> +
> + if (drvpath) {
> + /* write driver path to xenstore for later rebinding */
> + path = GCSPRINTF(USBBACK_INFO_PATH"/%s/%s/driver_path",
> + usb_encode,
> usb_interface_xenstore_encode(intf));
> + if (libxl__xs_write_checked(gc, XBT_NULL, path, drvpath) < 0) {
> + LOG(WARN, "Write of %s to node %s failed", drvpath, path);
> + }
> + }
> +
> + /* bind interface to usbback */
> + if (bind_usb_intf(gc, intf, SYSFS_USBBACK_DRIVER) < 0) {
> + LOGE(ERROR, "Couldn't bind %s to %s", intf,
> SYSFS_USBBACK_DRIVER);
> + rc = ERROR_FAIL;
> + goto out_rebind;
> + }
> + }
> +
> + rc = 0;
> + goto out;
> +
> +out_rebind:
> + /* some interfaces might be bound to usbback, unbind it then and
> + * rebind to its original driver
> + */
> + usbback_dev_unassign(gc, usb);
> +out:
> + free(usb_encode);
> + return rc;
> +}
> +
> +/*
> + * USB add
> + */
> +static int do_usb_add(libxl__gc *gc, uint32_t domid,
> + libxl_device_usb *usbdev,
> + libxl__ao_device *aodev)
> +{
> + libxl_ctx *ctx = CTX;
> + libxl_usbctrlinfo usbctrlinfo;
> + libxl_device_usbctrl usbctrl;
> + int rc;
> +
> + libxl_device_usbctrl_init(&usbctrl);
> + libxl_usbctrlinfo_init(&usbctrlinfo);
> + usbctrl.devid = usbdev->ctrl;
> + rc = libxl_device_usbctrl_getinfo(ctx, domid, &usbctrl, &usbctrlinfo);
> + if (rc)
> + goto out;
> +
> + switch (usbctrlinfo.type) {
> + case LIBXL_USBCTRL_TYPE_DEVICEMODEL:
> + LOG(ERROR, "Not supported");
> + break;
> + case LIBXL_USBCTRL_TYPE_PV:
> + rc = libxl__device_usb_add_xenstore(gc, domid, usbdev,
> + aodev->update_json);
> + if (rc) goto out;
> +
> + rc = usbback_dev_assign(gc, usbdev);
> + if (rc) {
> + libxl__device_usb_remove_xenstore(gc, domid, usbdev);
> + goto out;
> + }
> + break;
> + default:
> + rc = ERROR_FAIL;
> + goto out;
> + }
> +
> +out:
> + libxl_device_usbctrl_dispose(&usbctrl);
> + libxl_usbctrlinfo_dispose(&usbctrlinfo);
> + return rc;
> +}
> +
> +/* AO operation to add a usb device.
> + *
> + * Generally, it does:
> + * 1) check if the usb device type is assignable
> + * 2) check if the usb device is already assigned to a domain
> + * 3) add 'busid' of the usb device to xenstore contoller/port/.
> + * (PVUSB driver watches the xenstore changes and will detect that.)
> + * 4) unbind usb device from original driver and bind to usbback.
> + * If usb device has many interfaces, then:
> + * - unbind each interface from its original driver and bind to usbback.
> + * - store the original driver to xenstore for later rebinding when
> + * detaching the device.
> + *
> + * Before calling this function, aodev should be properly filled:
> + * aodev->ao, aodev->callback, aodev->update_json, ...
> + */
> +void libxl__device_usb_add(libxl__egc *egc, uint32_t domid,
> + libxl_device_usb *usb,
> + libxl__ao_device *aodev)
> +{
> + STATE_AO_GC(aodev->ao);
> + int rc;
> + char *busid = NULL;
> + libxl_device_usb *assigned;
> + int num_assigned;
> + libxl_device_usbctrl usbctrl;
> + libxl_usbctrlinfo usbctrlinfo;
> +
> + libxl_device_usbctrl_init(&usbctrl);
> + libxl_usbctrlinfo_init(&usbctrlinfo);
> +
> + /* Currently only support adding USB device from Dom0 backend.
> + * So, if USB controller is specified, check backend domain, if
> + * it is not Dom0, report error as not supported.
> + *
> + * -1 is the default value of libxl_device_usbctrl.
> + */
> + if (usb->ctrl != -1) {
> + usbctrl.devid = usb->ctrl;
> + rc = libxl_device_usbctrl_getinfo(CTX, domid, &usbctrl,
> &usbctrlinfo);
> + if (rc) goto out;
> +
> + if (usbctrlinfo.backend_id != 0) {
> + LOG(ERROR, "Don't support adding USB device from non-Dom0
> backend");
> + rc = ERROR_INVAL;
> + goto out;
> + }
> + }
> +
> + busid = usb_busaddr_to_busid(gc, usb->u.hostdev.hostbus,
> + usb->u.hostdev.hostaddr);
> + if (!busid) {
> + LOG(ERROR, "USB device doesn't exist in sysfs");
> + rc = ERROR_FAIL;
> + goto out;
> + }
> +
> + if (!is_usb_assignable(gc, usb)) {
> + LOG(ERROR, "USB device is not assignable.");
> + rc = ERROR_FAIL;
> + goto out;
> + }
> +
> + /* check usb device is already assigned */
> + rc = get_assigned_devices(gc, &assigned, &num_assigned);
> + if (rc) {
> + LOG(ERROR, "cannot determine if device is assigned,"
> + " refusing to continue");
> + rc = ERROR_FAIL;
> + goto out;
> + }
> +
> + if (is_usbdev_in_array(assigned, num_assigned, usb)) {
> + LOG(ERROR, "USB device already attached to a domain");
> + rc = ERROR_FAIL;
> + goto out;
> + }
> +
> + rc = libxl__device_usb_setdefault(gc, domid, usb, aodev->update_json);
> + if (rc) goto out;
> +
> + /* Do the add */
> + if (do_usb_add(gc, domid, usb, aodev)) {
> + rc = ERROR_FAIL;
> + goto out;
> + }
> +
> + libxl__ao_complete(egc, ao, 0);
> + rc = 0;
> +
> +out:
> + libxl_device_usbctrl_dispose(&usbctrl);
> + libxl_usbctrlinfo_dispose(&usbctrlinfo);
> + aodev->rc = rc;
> + if (rc) aodev->callback(egc, aodev);
> + return;
> +}
> +
> +static int do_usb_remove(libxl__gc *gc, uint32_t domid,
> + libxl_device_usb *usbdev)
> +{
> + libxl_ctx *ctx = CTX;
> + libxl_usbctrlinfo usbctrlinfo;
> + libxl_device_usbctrl usbctrl;
> + int rc;
> +
> + libxl_device_usbctrl_init(&usbctrl);
> + libxl_usbctrlinfo_init(&usbctrlinfo);
> + usbctrl.devid = usbdev->ctrl;
> +
> + rc = libxl_device_usbctrl_getinfo(ctx, domid, &usbctrl, &usbctrlinfo);
> + if (rc) goto out;
> +
> + if (usbctrlinfo.backend_id != 0) {
> + LOG(ERROR, "Don't support removing USB device from non-Dom0
> backend");
> + rc = ERROR_INVAL;
> + goto out;
> + }
> +
> + switch (usbctrlinfo.type) {
> + case LIBXL_USBCTRL_TYPE_DEVICEMODEL:
> + LOG(ERROR, "Not supported");
> + break;
> + case LIBXL_USBCTRL_TYPE_PV:
> + rc = libxl__device_usb_remove_xenstore(gc, domid, usbdev);
> + if (rc) goto out;
> +
> + usbback_dev_unassign(gc, usbdev);
> + break;
> + default:
> + rc = ERROR_FAIL;
> + goto out;
> + }
> +
> + rc = 0;
> +
> +out:
> + libxl_device_usbctrl_dispose(&usbctrl);
> + libxl_usbctrlinfo_dispose(&usbctrlinfo);
> + return rc;
> +}
> +
> +/* Operation to remove usb device.
> + *
> + * Generally, it does:
> + * 1) check if the usb device is assigned to the domain
> + * 2) remove the usb device from xenstore controller/port.
> + * 3) unbind usb device from usbback and rebind to its original driver.
> + * If usb device has many interfaces, do it to each interface.
> + */
> +static int libxl__device_usb_remove(libxl__gc *gc, uint32_t domid,
> + libxl_device_usb *usb)
> +{
> + int rc;
> +
> + if (usb->ctrl < 0 || usb->port < 1) {
> + LOG(ERROR, "Invalid USB device");
> + rc = ERROR_FAIL;
> + goto out;
> + }
> +
> + if (usb->devtype == LIBXL_USBDEV_TYPE_HOSTDEV &&
> + (usb->u.hostdev.hostbus < 1 || usb->u.hostdev.hostaddr < 1)) {
> + LOG(ERROR, "Invalid USB device of hostdev");
> + rc = ERROR_FAIL;
> + goto out;
> + }
> +
> + /* Do the remove */
> + rc = do_usb_remove(gc, domid, usb);
> +
> +out:
> + return rc;
> +}
> +
> +int libxl_device_usb_remove(libxl_ctx *ctx, uint32_t domid,
> + libxl_device_usb *usb,
> + const libxl_asyncop_how *ao_how)
> +
> +{
> + AO_CREATE(ctx, domid, ao_how);
> + int rc;
> +
> + rc = libxl__device_usb_remove(gc, domid, usb);
> +
> + libxl__ao_complete(egc, ao, rc);
> + return AO_INPROGRESS;
> +}
> +
> +int libxl_ctrlport_to_device_usb(libxl_ctx *ctx,
> + uint32_t domid,
> + int ctrl,
> + int port,
> + libxl_device_usb *usb)
> +{
> + GC_INIT(ctx);
> + const char *dompath, *be_path, *busid;
> + int rc;
> +
> + dompath = libxl__xs_get_dompath(gc, domid);
> +
> + rc = libxl__xs_read_checked(gc, XBT_NULL,
> + GCSPRINTF("%s/device/vusb/%d/backend", dompath, ctrl),
> + &be_path);
> + if (rc) goto out;
> +
> + rc = libxl__xs_read_checked(gc, XBT_NULL,
> + GCSPRINTF("%s/port/%d", be_path, port),
> + &busid);
> + if (rc) goto out;
> +
> + if (!strcmp(busid, "")) {
> + rc = ERROR_FAIL;
> + goto out;
> + }
> +
> + usb->ctrl = ctrl;
> + usb->port = port;
> + rc = usb_busaddr_from_busid(gc, busid, &usb->u.hostdev.hostbus,
> + &usb->u.hostdev.hostaddr);
> +
> +out:
> + GC_FREE;
> + return rc;
> +}
> +/*
> + * Local variables:
> + * mode: C
> + * c-basic-offset: 4
> + * indent-tabs-mode: nil
> + * End:
> + */
> diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
> index d6ef9a2..dccb317 100644
> --- a/tools/libxl/libxl_types.idl
> +++ b/tools/libxl/libxl_types.idl
> @@ -603,6 +603,35 @@ libxl_device_rdm = Struct("device_rdm", [
> ("policy", libxl_rdm_reserve_policy),
> ])
>
> +libxl_usbctrl_type = Enumeration("usbctrl_type", [
> + (0, "AUTO"),
> + (1, "PV"),
> + (2, "DEVICEMODEL"),
> + ])
> +
> +libxl_usbdev_type = Enumeration("usbdev_type", [
> + (1, "hostdev"),
> + ])
> +
> +libxl_device_usbctrl = Struct("device_usbctrl", [
> + ("type", libxl_usbctrl_type),
> + ("devid", libxl_devid),
> + ("version", integer),
> + ("ports", integer),
> + ("backend_domid", libxl_domid),
> + ("backend_domname", string),
> + ])
> +
> +libxl_device_usb = Struct("device_usb", [
> + ("ctrl", libxl_devid),
> + ("port", integer),
> + ("u", KeyedUnion(None, libxl_usbdev_type, "devtype",
> + [("hostdev", Struct(None, [
> + ("hostbus", uint8),
> + ("hostaddr", uint8)])),
> + ])),
> + ])
> +
> libxl_device_dtdev = Struct("device_dtdev", [
> ("path", string),
> ])
> @@ -635,6 +664,8 @@ libxl_domain_config = Struct("domain_config", [
> ("pcidevs", Array(libxl_device_pci, "num_pcidevs")),
> ("rdms", Array(libxl_device_rdm, "num_rdms")),
> ("dtdevs", Array(libxl_device_dtdev, "num_dtdevs")),
> + ("usbctrls", Array(libxl_device_usbctrl, "num_usbctrls")),
> + ("usbs", Array(libxl_device_usb, "num_usbs")),
> ("vfbs", Array(libxl_device_vfb, "num_vfbs")),
> ("vkbs", Array(libxl_device_vkb, "num_vkbs")),
> ("vtpms", Array(libxl_device_vtpm, "num_vtpms")),
> @@ -684,6 +715,32 @@ libxl_vtpminfo = Struct("vtpminfo", [
> ("uuid", libxl_uuid),
> ], dir=DIR_OUT)
>
> +libxl_usbctrlinfo = Struct("usbctrlinfo", [
> + ("type", libxl_usbctrl_type),
> + ("devid", libxl_devid),
> + ("version", integer),
> + ("ports", integer),
> + ("backend", string),
> + ("backend_id", uint32),
> + ("frontend", string),
> + ("frontend_id", uint32),
> + ("state", integer),
> + ("evtch", integer),
> + ("ref_urb", integer),
> + ("ref_conn", integer),
> + ], dir=DIR_OUT)
> +
> +libxl_usbinfo = Struct("usbinfo", [
> + ("ctrl", libxl_devid),
> + ("port", integer),
> + ("busnum", uint8),
> + ("devnum", uint8),
> + ("idVendor", uint16),
> + ("idProduct", uint16),
> + ("prod", string),
> + ("manuf", string),
> + ], dir=DIR_OUT)
> +
> libxl_vcpuinfo = Struct("vcpuinfo", [
> ("vcpuid", uint32),
> ("cpu", uint32),
> diff --git a/tools/libxl/libxl_types_internal.idl
> b/tools/libxl/libxl_types_internal.idl
> index 5e55685..696f5f8 100644
> --- a/tools/libxl/libxl_types_internal.idl
> +++ b/tools/libxl/libxl_types_internal.idl
> @@ -22,6 +22,7 @@ libxl__device_kind = Enumeration("device_kind", [
> (6, "VKBD"),
> (7, "CONSOLE"),
> (8, "VTPM"),
> + (9, "VUSB"),
> ])
>
> libxl__console_backend = Enumeration("console_backend", [
> diff --git a/tools/libxl/libxl_utils.c b/tools/libxl/libxl_utils.c
> index 9c5c4d0..706a0c1 100644
> --- a/tools/libxl/libxl_utils.c
> +++ b/tools/libxl/libxl_utils.c
> @@ -1270,6 +1270,22 @@ int libxl__random_bytes(libxl__gc *gc, uint8_t *buf,
> size_t len)
> return ret;
> }
>
> +void libxl_device_usbctrl_list_free(libxl_device_usbctrl *list, int nr)
> +{
> + int i;
> + for (i = 0; i < nr; i++)
> + libxl_device_usbctrl_dispose(&list[i]);
> + free(list);
> +}
> +
> +void libxl_device_usb_list_free(libxl_device_usb *list, int nr)
> +{
> + int i;
> + for (i = 0; i < nr; i++)
> + libxl_device_usb_dispose(&list[i]);
> + free(list);
> +}
> +
> /*
> * Local variables:
> * mode: C
> diff --git a/tools/libxl/libxl_utils.h b/tools/libxl/libxl_utils.h
> index 339ebdf..60487e3 100644
> --- a/tools/libxl/libxl_utils.h
> +++ b/tools/libxl/libxl_utils.h
> @@ -76,6 +76,11 @@ int libxl_uuid_to_device_vtpm(libxl_ctx *ctx, uint32_t
> domid,
> libxl_uuid *uuid, libxl_device_vtpm *vtpm);
> int libxl_devid_to_device_vtpm(libxl_ctx *ctx, uint32_t domid,
> int devid, libxl_device_vtpm *vtpm);
> +int libxl_devid_to_device_usbctrl(libxl_ctx *ctx, uint32_t domid,
> + int devid, libxl_device_usbctrl
> *usbctrl);
> +int libxl_ctrlport_to_device_usb(libxl_ctx *ctx, uint32_t domid,
> + int ctrl, int port,
> + libxl_device_usb *usb);
>
> int libxl_bitmap_alloc(libxl_ctx *ctx, libxl_bitmap *bitmap, int n_bits);
> /* Allocated bimap is from malloc, libxl_bitmap_dispose() to be
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