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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH V6 3/7] libxl: add pvusb API
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:
- Address George's comments:
* Update libxl_device_usb_getinfo to read ctrl/port only and
get other information.
* Update backend path according to xenstore frontend 'xxx/backend'
entry instead of using TOOLSTACK_DOMID.
* Use 'type' to indicate qemu/pv instead of previous naming 'protocol'.
* Add USB 'devtype' union, currently only includes "hostdev"
tools/libxl/Makefile | 2 +-
tools/libxl/libxl.c | 53 ++
tools/libxl/libxl.h | 65 ++
tools/libxl/libxl_device.c | 4 +
tools/libxl/libxl_internal.h | 20 +-
tools/libxl/libxl_osdeps.h | 13 +
tools/libxl/libxl_pvusb.c | 1320 ++++++++++++++++++++++++++++++++++
tools/libxl/libxl_types.idl | 59 ++
tools/libxl/libxl_types_internal.idl | 1 +
tools/libxl/libxl_utils.c | 16 +
tools/libxl/libxl_utils.h | 5 +
11 files changed, 1556 insertions(+), 2 deletions(-)
create mode 100644 tools/libxl/libxl_pvusb.c
diff --git a/tools/libxl/Makefile b/tools/libxl/Makefile
index 9036076..cdb50fe 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 006e8da..35843a8 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -4179,11 +4179,54 @@ DEFINE_DEVICE_REMOVE(vtpm, destroy, 1)
/******************************************************************************/
+/* Macro for defining device remove/destroy functions for usbctrl */
+/* Following 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) \
@@ -4215,6 +4258,12 @@ DEFINE_DEVICE_ADD(nic)
/* vtpm */
DEFINE_DEVICE_ADD(vtpm)
+/* usbctrl */
+DEFINE_DEVICE_ADD(usbctrl)
+
+/* usb */
+DEFINE_DEVICE_ADD(usb)
+
#undef DEFINE_DEVICE_ADD
/******************************************************************************/
@@ -6671,6 +6720,10 @@ 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 5f9047c..05b6331 100644
--- a/tools/libxl/libxl.h
+++ b/tools/libxl/libxl.h
@@ -123,6 +123,23 @@
#define LIBXL_HAVE_DOMAIN_NODEAFFINITY 1
/*
+ * LIBXL_HAVE_PVUSB indicates the functions for doing hot-plug of
+ * USB devices through pvusb.
+ *
+ * With this functionality, 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 either 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 either 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.
+ *
+ */
+#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
@@ -1389,6 +1406,54 @@ 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 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);
+
+libxl_device_usb *
+libxl_device_usb_list_per_usbctrl(libxl_ctx *ctx, uint32_t domid,
+ libxl_devid usbctrl, int *num);
+
+void libxl_device_usb_list_free(libxl_device_usb *list, int nr);
+
+int libxl_device_usb_getinfo(libxl_ctx *ctx, uint32_t domid,
+ libxl_device_usb *usb,
+ libxl_usbinfo *usbinfo);
+
/* 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 bee5ed5..935f25b 100644
--- a/tools/libxl/libxl_device.c
+++ b/tools/libxl/libxl_device.c
@@ -676,6 +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;
+ if (dev->backend_kind == LIBXL__DEVICE_KIND_VUSB) {
+ libxl__initiate_device_usbctrl_remove(egc, aodev);
+ continue;
+ }
libxl__initiate_device_remove(egc, aodev);
}
}
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index f98f089..5be3b3a 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -2553,6 +2553,14 @@ _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);
@@ -2585,6 +2593,13 @@ _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.
@@ -3937,7 +3952,10 @@ 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)->u.hostdev.hostbus == (b)->u.hostdev.hostbus &&
\
+ (a)->u.hostdev.hostaddr == (b)->u.hostdev.hostaddr)
+#define COMPARE_USBCTRL(a, b) ((a)->devid == (b)->devid)
+
/* DEVICE_ADD
*
* Add a device in libxl_domain_config structure
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..d4c4c03
--- /dev/null
+++ b/tools/libxl/libxl_pvusb.c
@@ -0,0 +1,1320 @@
+/*
+ * 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"
+
+#define USBBACK_INFO_PATH "/libxl/usbback"
+
+#define USBHUB_CLASS_CODE 9
+
+/* Utility to read backend xenstore keys */
+#define READ_BACKEND(tgc, subpath) \
+ libxl__xs_read(tgc, XBT_NULL, GCSPRINTF("%s/" subpath, be_path))
+
+/* Utility to read frontend xenstore keys */
+#define READ_FRONTEND(tgc, subpath) \
+ libxl__xs_read(tgc, XBT_NULL, GCSPRINTF("%s/" subpath, fe_path))
+
+static int libxl__device_usbctrl_setdefault(libxl__gc *gc, uint32_t domid,
+ libxl_device_usbctrl *usbctrl)
+{
+ int rc;
+
+ if (!usbctrl->version)
+ usbctrl->version = 2;
+
+ if (!usbctrl->ports)
+ usbctrl->ports = 8;
+
+ if (usbctrl->type == LIBXL_USBCTRL_TYPE_AUTO)
+ usbctrl->type = LIBXL_USBCTRL_TYPE_PV;
+
+ 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.
+ */
+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;
+ }
+ }
+
+ 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);
+
+ rc = 0;
+
+out:
+ aodev->rc = rc;
+ if (rc) aodev->callback(egc, aodev);
+ return;
+}
+
+static int
+libxl__device_usb_list_per_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
+ */
+void libxl__initiate_device_usbctrl_remove(libxl__egc *egc,
+ libxl__ao_device *aodev)
+{
+ STATE_AO_GC(aodev->ao);
+ libxl_device_usb *usbs = NULL;
+ int numusb = 0;
+ int i, rc;
+ uint32_t domid = ao->domid;
+ int usbctrl_devid = aodev->dev->devid;
+
+ /* Remove usb devices first */
+ rc = libxl__device_usb_list_per_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_usb_list_free(usbs, numusb);
+
+ /* Remove usbctrl */
+ return libxl__initiate_device_remove(egc, aodev);
+
+out:
+ libxl_device_usb_list_free(usbs, numusb);
+ 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 **dir = NULL;
+ unsigned int ndirs = 0;
+
+ *num = 0;
+
+ path = GCSPRINTF("%s/device/vusb",
+ libxl__xs_get_dompath(gc, domid));
+ dir = libxl__xs_directory(gc, XBT_NULL, path, &ndirs);
+
+ if (dir && ndirs) {
+ usbctrls = libxl__zalloc(NOGC, sizeof(*usbctrls) * ndirs);
+ libxl_device_usbctrl *usbctrl;
+ libxl_device_usbctrl *end = usbctrls + ndirs;
+ for (usbctrl = usbctrls; usbctrl < end; usbctrl++, dir++, (*num)++) {
+ const char *tmp, *be_path;
+ const char *fe_path = GCSPRINTF("%s/%s", path, *dir);
+
+ libxl_device_usbctrl_init(usbctrl);
+ usbctrl->devid = atoi(*dir);
+
+ be_path = READ_FRONTEND(gc, "backend");
+ if (!be_path) goto outerr;
+
+ tmp = READ_FRONTEND(gc, "backend-id");
+ if (!tmp) goto outerr;
+ usbctrl->backend_domid = atoi(tmp);
+
+ tmp = READ_BACKEND(gc, "usb-ver");
+ if (!tmp) goto outerr;
+ usbctrl->version = atoi(tmp);
+
+ tmp = READ_BACKEND(gc, "num-ports");
+ if (!tmp) goto outerr;
+ usbctrl->ports = atoi(tmp);
+
+ tmp = READ_BACKEND(gc, "type");
+ if (!tmp) goto outerr;
+ libxl_usbctrl_type_from_string(tmp, &usbctrl->type);
+ }
+ }
+
+ 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);
+ char *dompath;
+ const char *fe_path, *be_path, *tmp;
+ int rc = 0;
+
+ usbctrlinfo->devid = usbctrl->devid;
+
+ dompath = libxl__xs_get_dompath(gc, domid);
+ fe_path = GCSPRINTF("%s/device/vusb/%d", dompath, usbctrl->devid);
+ be_path = READ_FRONTEND(gc, "backend");
+ if (!be_path) {
+ rc = ERROR_FAIL;
+ goto out;
+ }
+ usbctrlinfo->backend = libxl__strdup(NOGC, be_path);
+
+ tmp = READ_FRONTEND(gc, "backend-id");
+ usbctrlinfo->backend_id = tmp ? strtoul(tmp, NULL, 10) : -1;
+
+ tmp = READ_FRONTEND(gc, "state");
+ usbctrlinfo->state = tmp ? strtoul(tmp, NULL, 10) : -1;
+
+ tmp = READ_FRONTEND(gc, "event-channel");
+ usbctrlinfo->evtch = tmp ? strtoul(tmp, NULL, 10) : -1;
+
+ tmp = READ_FRONTEND(gc, "urb-ring-ref");
+ usbctrlinfo->ref_urb = tmp ? strtoul(tmp, NULL, 10) : -1;
+
+ tmp = READ_FRONTEND(gc, "conn-ring-ref");
+ usbctrlinfo->ref_conn = tmp ? strtoul(tmp, NULL, 10) : -1;
+
+ tmp = READ_BACKEND(gc, "frontend");
+ usbctrlinfo->frontend = libxl__strdup(NOGC, tmp);
+
+ tmp = READ_BACKEND(gc, "frontend-id");
+ usbctrlinfo->frontend_id = tmp ? strtoul(tmp, NULL, 10) : -1;
+
+ tmp = READ_BACKEND(gc, "num-ports");
+ usbctrlinfo->ports = tmp ? strtoul(tmp, NULL, 10) : -1;
+
+ tmp = READ_BACKEND(gc, "usb-ver");
+ usbctrlinfo->version = tmp ? strtoul(tmp, NULL, 10) : -1;
+
+ tmp = READ_BACKEND(gc, "type");
+ libxl_usbctrl_type_from_string(tmp, &usbctrlinfo->type);
+
+out:
+ GC_FREE;
+ return rc;
+}
+
+int libxl_devid_to_device_usbctrl(libxl_ctx *ctx,
+ uint32_t domid,
+ int devid,
+ libxl_device_usbctrl *usbctrl)
+{
+ GC_INIT(ctx);
+ libxl_device_usbctrl *usbctrls;
+ int nb = 0;
+ int i, rc = -1;
+
+ usbctrls = libxl_device_usbctrl_list(ctx, domid, &nb);
+ if (!nb) goto out;
+
+ libxl_device_usbctrl_init(usbctrl);
+ for (i = 0; i < nb; i++) {
+ if (devid == usbctrls[i].devid) {
+ *usbctrl = usbctrls[i];
+ rc = 0;
+ break;
+ }
+ }
+
+ libxl_device_usbctrl_list_free(usbctrls, nb);
+
+out:
+ GC_FREE;
+ return rc;
+}
+
+static char *usb_busaddr_to_busid(libxl__gc *gc, int bus, int addr)
+{
+ libxl_ctx *ctx = CTX;
+ struct dirent *de;
+ DIR *dir;
+ char *busid = NULL;
+
+ assert(bus > 0 && addr > 0);
+
+ 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(ctx, filename, &buf, NULL))
+ sscanf(buf, "%d", &devnum);
+
+ filename = GCSPRINTF(SYSFS_USB_DEV"/%s/busnum", de->d_name);
+ if (!libxl_read_sysfs_file_contents(ctx, filename, &buf, NULL))
+ sscanf(buf, "%d", &busnum);
+
+ if (bus == busnum && addr == devnum) {
+ busid = libxl__strdup(NOGC, de->d_name);
+ break;
+ }
+ }
+
+ closedir(dir);
+ return busid;
+}
+
+static void usb_busaddr_from_busid(libxl__gc *gc, char *busid,
+ int *bus, int *addr)
+{
+ libxl_ctx *ctx = CTX;
+ char *filename;
+ void *buf;
+
+ assert(busid);
+
+ filename = GCSPRINTF(SYSFS_USB_DEV"/%s/busnum", busid);
+ if (!libxl_read_sysfs_file_contents(ctx, filename, &buf, NULL))
+ sscanf(buf, "%d", bus);
+
+ filename = GCSPRINTF(SYSFS_USB_DEV"/%s/devnum", busid);
+ if (!libxl_read_sysfs_file_contents(ctx, filename, &buf, NULL))
+ sscanf(buf, "%d", addr);
+}
+
+static int
+libxl__device_usb_assigned_list(libxl__gc *gc,
+ libxl_device_usb **list, int *num)
+{
+ char **domlist;
+ unsigned int nd = 0, i, j;
+ libxl_device_usb *usb;
+
+ *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++) {
+ char *be_path, *num_ports;
+
+ be_path = libxl__xs_read(gc, XBT_NULL,
+ GCSPRINTF("%s/%s/backend", path, ctrl_list[j]));
+ num_ports = READ_BACKEND(gc, "num-ports");
+ if (num_ports) {
+ int nport = atoi(num_ports), k;
+ char *devpath, *busid;
+
+ for (k = 0; k < nport; k++) {
+ devpath = GCSPRINTF("%s/port/%d", be_path, k + 1);
+ busid = libxl__xs_read(gc, XBT_NULL, devpath);
+ /* If there is USB device attached, add it to list */
+ if (busid && strcmp(busid, "")) {
+ GCREALLOC_ARRAY(*list, *num + 1);
+ usb = *list + *num;
+ usb->ctrl = atoi(ctrl_list[j]);
+ usb->port = k + 1;
+ usb_busaddr_from_busid(gc, busid,
+ &usb->u.hostdev.hostbus,
+ &usb->u.hostdev.hostaddr);
+ (*num)++;
+ }
+ }
+ }
+ }
+ }
+
+ return 0;
+}
+
+static bool is_usb_in_array(libxl_device_usb *usbs, int num,
+ libxl_device_usb *usb)
+{
+ int i;
+
+ for (i = 0; i < num; i++) {
+ if (COMPARE_USB(&usbs[i], usb))
+ return true;
+ }
+
+ return false;
+}
+
+/* check if USB device is already assigned to a domain */
+static bool is_usb_assigned(libxl__gc *gc, libxl_device_usb *usb)
+{
+ libxl_device_usb *usbs;
+ int rc, num;
+
+ rc = libxl__device_usb_assigned_list(gc, &usbs, &num);
+ if (rc) {
+ LOG(ERROR, "Fail to get assigned usb list");
+ return true;
+ }
+
+ return is_usb_in_array(usbs, num, usb);
+}
+
+/* check if USB device type is assignable */
+static bool is_usb_assignable(libxl__gc *gc, libxl_device_usb *usb)
+{
+ libxl_ctx *ctx = CTX;
+ int classcode;
+ char *filename;
+ void *buf = NULL;
+ char *busid = NULL;
+
+ assert(usb->u.hostdev.hostbus > 0 && usb->u.hostdev.hostaddr > 0);
+ busid = usb_busaddr_to_busid(gc, usb->u.hostdev.hostbus,
usb->u.hostdev.hostaddr);
+
+ filename = GCSPRINTF(SYSFS_USB_DEV"/%s/bDeviceClass", busid);
+ if (libxl_read_sysfs_file_contents(ctx, filename, &buf, NULL))
+ return false;
+
+ sscanf(buf, "%d", &classcode);
+ return classcode != USBHUB_CLASS_CODE;
+}
+
+/* get usb devices under certain usb controller */
+static int
+libxl__device_usb_list_per_usbctrl(libxl__gc *gc, uint32_t domid,
+ libxl_devid usbctrl,
+ libxl_device_usb **usbs, int *num)
+{
+ char *fe_path, *be_path, *num_devs;
+ int n, i;
+
+ *usbs = NULL;
+ *num = 0;
+
+ fe_path = GCSPRINTF("%s/device/vusb/%d",
+ libxl__xs_get_dompath(gc, domid), usbctrl);
+ if (!fe_path)
+ return -1;
+
+ be_path = READ_FRONTEND(gc, "backend");
+ if (!be_path)
+ return -1;
+
+ num_devs = READ_BACKEND(gc, "num-ports");
+ if (!num_devs)
+ return 0;
+
+ n = atoi(num_devs);
+ *usbs = libxl__calloc(NOGC, n, sizeof(libxl_device_usb));
+
+ for (i = 0; i < n; i++) {
+ char *busid;
+ libxl_device_usb *usb = NULL;
+
+ busid = libxl__xs_read(gc, XBT_NULL,
+ GCSPRINTF("%s/port/%d", be_path, i + 1));
+ if (busid && strcmp(busid, "")) {
+ usb = *usbs + *num;
+ usb->ctrl = usbctrl;
+ usb->port = i + 1;
+ usb_busaddr_from_busid(gc, busid,
+ &usb->u.hostdev.hostbus,
+ &usb->u.hostdev.hostaddr);
+ (*num)++;
+ }
+ }
+
+ return 0;
+}
+
+/* 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_per_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++) {
+ usbs[*num] = tmp[j];
+ (*num)++;
+ }
+ libxl_device_usb_list_free(tmp, nd);
+ }
+
+ GC_FREE;
+ return usbs;
+}
+
+libxl_device_usb *
+libxl_device_usb_list_per_usbctrl(libxl_ctx *ctx, uint32_t domid,
+ libxl_devid usbctrl, int *num)
+{
+ GC_INIT(ctx);
+ libxl_device_usb *usbs = NULL;
+
+ libxl__device_usb_list_per_usbctrl(gc, domid, usbctrl, &usbs, 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 = -1;
+
+ usbctrls = libxl_device_usbctrl_list(ctx, domid, &numctrl);
+ if (!numctrl)
+ goto out;
+
+ 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;
+ break;
+ }
+ }
+ }
+
+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 = -1;
+
+ 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) {
+ 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;
+ char *fe_path, *be_path, *tmp;
+
+ fe_path = GCSPRINTF("%s/device/vusb/%d",
+ libxl__xs_get_dompath(gc, domid), usb->ctrl);
+ be_path = READ_FRONTEND(gc, "backend");
+ tmp = READ_BACKEND(gc, "num-ports");
+ ports = tmp ? atoi(tmp) : 0;
+
+ 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");
+ goto out;
+ }
+ } else {
+ char *fe_path, *be_path, *tmp;
+
+ fe_path = GCSPRINTF("%s/device/vusb/%d",
+ libxl__xs_get_dompath(gc, domid), usb->ctrl);
+ be_path = READ_FRONTEND(gc, "backend");
+ tmp = libxl__xs_read(gc, XBT_NULL,
+ GCSPRINTF("%s/port/%d", be_path, usb->port));
+ if (!tmp || strcmp(tmp, "")) {
+ LOG(ERROR, "The controller port isn't available");
+ 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 = 0;
+ 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 = 0;
+
+ path = GCSPRINTF("%s/%s", drvpath, intf);
+ rc = lstat(path, &st);
+ /* already bind, return */
+ if (rc == 0)
+ 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 = 0;
+
+ *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);
+
+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 = 0;
+ 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);
+
+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 = 0;
+ 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;
+ }
+ }
+
+ 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;
+}
+
+/* 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.
+ */
+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 = -1;
+ char *busid = NULL;
+
+ assert(usb->u.hostdev.hostbus > 0 && usb->u.hostdev.hostaddr > 0);
+
+ 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");
+ goto out;
+ }
+
+ if (!is_usb_assignable(gc, usb)) {
+ LOG(ERROR, "USB device is not assignable.");
+ goto out;
+ }
+
+ /* check usb device is already assigned */
+ if (is_usb_assigned(gc, usb)) {
+ LOG(ERROR, "USB device is already attached to a domain.");
+ goto out;
+ }
+
+ rc = libxl__device_usb_setdefault(gc, domid, usb, aodev->update_json);
+ if (rc) goto out;
+
+ rc = libxl__device_usb_add_xenstore(gc, domid, usb, aodev->update_json);
+ if (rc) goto out;
+
+ rc = usbback_dev_assign(gc, usb);
+ if (rc) {
+ libxl__device_usb_remove_xenstore(gc, domid, usb);
+ goto out;
+ }
+
+ libxl__ao_complete(egc, ao, 0);
+ rc = 0;
+
+out:
+ aodev->rc = rc;
+ if (rc) aodev->callback(egc, aodev);
+ return;
+}
+
+/* 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)
+{
+ if (libxl__device_usb_remove_xenstore(gc, domid, usb))
+ return -1;
+
+ usbback_dev_unassign(gc, usb);
+
+ return 0;
+}
+
+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);
+ char *dompath, *be_path, *busid;
+ int rc = ERROR_FAIL;
+
+ dompath = libxl__xs_get_dompath(gc, domid);
+ if (!dompath)
+ goto out;
+
+ be_path = libxl__xs_read(gc, XBT_NULL,
+ GCSPRINTF("%s/device/vusb/%d/backend", dompath, ctrl));
+ if (!be_path)
+ goto out;
+
+ busid = libxl__xs_read(gc, XBT_NULL,
+ GCSPRINTF("%s/port/%d", be_path, port));
+ if (busid && strcmp(busid, "")) {
+ usb->ctrl = ctrl;
+ usb->port = port;
+ usb_busaddr_from_busid(gc, busid, &usb->u.hostdev.hostbus,
+ &usb->u.hostdev.hostaddr);
+ rc = 0;
+ }
+
+out:
+ GC_FREE;
+ return rc;
+}
+
+int libxl_device_usb_getinfo(libxl_ctx *ctx, uint32_t domid,
+ libxl_device_usb *usb,
+ libxl_usbinfo *usbinfo)
+{
+ GC_INIT(ctx);
+ char *filename;
+ char *busid;
+ void *buf = NULL;
+ int buflen, rc;
+
+ usbinfo->ctrl = usb->ctrl;
+ usbinfo->port = usb->port;
+
+ if (libxl_ctrlport_to_device_usb(ctx, domid,
+ usb->ctrl, usb->port, usb) < 0) {
+ rc = ERROR_FAIL;
+ goto out;
+ }
+
+ usbinfo->devnum = usb->u.hostdev.hostaddr;
+ usbinfo->busnum = usb->u.hostdev.hostbus;
+
+ busid = usb_busaddr_to_busid(gc, usb->u.hostdev.hostbus,
+ usb->u.hostdev.hostaddr);
+ if (!busid) {
+ rc = ERROR_FAIL;
+ goto out;
+ }
+
+ filename = GCSPRINTF(SYSFS_USB_DEV"/%s/idVendor", busid);
+ if (!libxl_read_sysfs_file_contents(ctx, filename, &buf, NULL))
+ sscanf(buf, "%x", &usbinfo->idVendor);
+
+ filename = GCSPRINTF(SYSFS_USB_DEV"/%s/idProduct", busid);
+ if (!libxl_read_sysfs_file_contents(ctx, filename, &buf, NULL))
+ sscanf(buf, "%x", &usbinfo->idProduct);
+
+ filename = GCSPRINTF(SYSFS_USB_DEV"/%s/manufacturer", busid);
+ if (!libxl_read_sysfs_file_contents(ctx, filename, &buf, &buflen) &&
+ buflen > 0) {
+ /* replace \n to \0 */
+ if (((char *)buf)[buflen - 1] == '\n')
+ ((char *)buf)[buflen - 1] = '\0';
+ usbinfo->manuf = libxl__strdup(NOGC, buf);
+ }
+
+ filename = GCSPRINTF(SYSFS_USB_DEV"/%s/product", busid);
+ if (!libxl_read_sysfs_file_contents(ctx, filename, &buf, &buflen) &&
+ buflen > 0) {
+ /* replace \n to \0 */
+ if (((char *)buf)[buflen - 1] == '\n')
+ ((char *)buf)[buflen - 1] = '\0';
+ usbinfo->prod = libxl__strdup(NOGC, buf);
+ }
+
+ rc = 0;
+
+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 ef346e7..ef10484 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -594,6 +594,37 @@ libxl_device_rdm = Struct("device_rdm", [
("policy", libxl_rdm_reserve_policy),
])
+libxl_usbctrl_type = Enumeration("usbctrl_type", [
+ (0, "AUTO"),
+ (1, "PV"),
+ (2, "QEMU"),
+ ])
+
+libxl_usbdev_type = Enumeration("usbdev_type", [
+ (0, "invalid"),
+ (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", integer),
+ ("hostaddr", integer)])),
+ ("invalid", None),
+ ])),
+ ])
+
libxl_device_dtdev = Struct("device_dtdev", [
("path", string),
])
@@ -626,6 +657,8 @@ 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")),
@@ -674,6 +707,32 @@ 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", integer),
+ ("devnum", integer),
+ ("idVendor", integer),
+ ("idProduct", integer),
+ ("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 9234efb..b196203 100644
--- a/tools/libxl/libxl_utils.c
+++ b/tools/libxl/libxl_utils.c
@@ -1241,6 +1241,22 @@ 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 1e5ca8a..ef049e3 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
--
2.1.4
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