From: Juergen Gross Date: Tue, 29 Mar 2016 05:29:19 +0000 (+0200) Subject: libxl: add new pvusb backend "qusb" provided by qemu X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~1373 X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks://%22Dat/%22http:/www.example.com/cgi/%22https:/%22bookmarks:/%22Dat?a=commitdiff_plain;h=043910384cb9ea2c781a7dceac238e110a559c10;p=xen.git libxl: add new pvusb backend "qusb" provided by qemu Add a new pvusb backend type "qusb" which is provided by qemu. It can be selected either by specifying the type directly in the configuration or it is selected automatically by libxl in case there is no "usbback" driver loaded. The "qusb" backend is a full replacement for the kernel based backend "vusb". The interface to the frontend is the very same including all Xenstore paths, while the backend paths in Xenstore differ ("qusb" instead ov "vusb"). Signed-off-by: Juergen Gross Acked-by: Wei Liu --- diff --git a/docs/man/xl.cfg.pod.5 b/docs/man/xl.cfg.pod.5 index ec739cc081..a4cc1b3b3c 100644 --- a/docs/man/xl.cfg.pod.5 +++ b/docs/man/xl.cfg.pod.5 @@ -737,8 +737,15 @@ Possible Bs are: =item B -Specifies the usb controller type. Currently only 'pv' and 'auto' -are supported. +Specifies the usb controller type. + +"pv" denotes a kernel based pvusb backend. + +"qusb" specifies a qemu base backend for pvusb. + +"auto" (the default) determines whether a kernel based backend is installed. +If this is the case, "pv" is selected, "qusb" will be selected if no kernel +backend is currently available. =item B diff --git a/docs/misc/xenstore-paths.markdown b/docs/misc/xenstore-paths.markdown index 7d5a06a47e..2a37daeb01 100644 --- a/docs/misc/xenstore-paths.markdown +++ b/docs/misc/xenstore-paths.markdown @@ -358,6 +358,13 @@ A PV USB backend. Described by A PV console backend. Described in [console.txt](console.txt) +#### ~/backend/qusb/$DOMID/$DEVID/* [] + +A PV USB device backend. Described by +[xen/include/public/io/usbif.h][USBIF] + +Uses the qemu based USB backend. + #### ~/device-model/$DOMID/* [INTERNAL] Information relating to device models running in the domain. $DOMID is diff --git a/tools/libxl/libxl_device.c b/tools/libxl/libxl_device.c index 4166988a02..38c121db31 100644 --- a/tools/libxl/libxl_device.c +++ b/tools/libxl/libxl_device.c @@ -703,7 +703,8 @@ 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) + if (dev->backend_kind == LIBXL__DEVICE_KIND_VUSB || + dev->backend_kind == LIBXL__DEVICE_KIND_QUSB) libxl__initiate_device_usbctrl_remove(egc, aodev); else libxl__initiate_device_generic_remove(egc, aodev); diff --git a/tools/libxl/libxl_dm.c b/tools/libxl/libxl_dm.c index d2bb5ca8ef..a45b2c0ca9 100644 --- a/tools/libxl/libxl_dm.c +++ b/tools/libxl/libxl_dm.c @@ -2365,6 +2365,14 @@ int libxl__need_xenpv_qemu(libxl__gc *gc, libxl_domain_config *d_config) } } + for (i = 0; i < d_config->num_usbctrls; i++) { + if (d_config->usbctrls[i].type == LIBXL_USBCTRL_TYPE_QUSB && + d_config->usbctrls[i].backend_domid == domid) { + ret = 1; + goto out; + } + } + out: return ret; } diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h index dbf0bd7a42..770f129c24 100644 --- a/tools/libxl/libxl_internal.h +++ b/tools/libxl/libxl_internal.h @@ -489,6 +489,7 @@ typedef struct { #define QEMU_BACKEND(dev) (\ (dev)->backend_kind == LIBXL__DEVICE_KIND_QDISK || \ (dev)->backend_kind == LIBXL__DEVICE_KIND_VFB || \ + (dev)->backend_kind == LIBXL__DEVICE_KIND_QUSB || \ (dev)->backend_kind == LIBXL__DEVICE_KIND_VKBD) #define XC_PCI_BDF "0x%x, 0x%x, 0x%x, 0x%x" diff --git a/tools/libxl/libxl_pvusb.c b/tools/libxl/libxl_pvusb.c index 5f92628276..68e5673c51 100644 --- a/tools/libxl/libxl_pvusb.c +++ b/tools/libxl/libxl_pvusb.c @@ -22,6 +22,21 @@ #define USBHUB_CLASS_CODE 9 +static int usbback_is_loaded(libxl__gc *gc) +{ + int r; + struct stat st; + + r = lstat(SYSFS_USBBACK_DRIVER, &st); + + if (r == 0) + return 1; + if (r < 0 && errno == ENOENT) + return 0; + LOGE(ERROR, "Accessing %s", SYSFS_USBBACK_DRIVER); + return ERROR_FAIL; +} + static int libxl__device_usbctrl_setdefault(libxl__gc *gc, uint32_t domid, libxl_device_usbctrl *usbctrl) { @@ -36,7 +51,11 @@ static int libxl__device_usbctrl_setdefault(libxl__gc *gc, uint32_t domid, if (usbctrl->type == LIBXL_USBCTRL_TYPE_AUTO) { if (domtype == LIBXL_DOMAIN_TYPE_PV) { - usbctrl->type = LIBXL_USBCTRL_TYPE_PV; + rc = usbback_is_loaded(gc); + if (rc < 0) + goto out; + usbctrl->type = rc ? LIBXL_USBCTRL_TYPE_PV + : LIBXL_USBCTRL_TYPE_QUSB; } else if (domtype == LIBXL_DOMAIN_TYPE_HVM) { /* FIXME: See if we can detect PV frontend */ usbctrl->type = LIBXL_USBCTRL_TYPE_DEVICEMODEL; @@ -45,6 +64,8 @@ static int libxl__device_usbctrl_setdefault(libxl__gc *gc, uint32_t domid, rc = libxl__resolve_domid(gc, usbctrl->backend_domname, &usbctrl->backend_domid); + +out: return rc; } @@ -54,7 +75,9 @@ int libxl__device_from_usbctrl(libxl__gc *gc, uint32_t domid, { device->backend_devid = usbctrl->devid; device->backend_domid = usbctrl->backend_domid; - device->backend_kind = LIBXL__DEVICE_KIND_VUSB; + device->backend_kind = (usbctrl->type == LIBXL_USBCTRL_TYPE_PV) + ? LIBXL__DEVICE_KIND_VUSB + : LIBXL__DEVICE_KIND_QUSB; device->devid = usbctrl->devid; device->domid = domid; device->kind = LIBXL__DEVICE_KIND_VUSB; @@ -64,9 +87,9 @@ int libxl__device_from_usbctrl(libxl__gc *gc, uint32_t domid, /* 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. + * Adding a usb controller will add a new 'qusb' or 'vusb' device in xenstore, + * and add corresponding frontend, backend information to it. According to + * "update_json", decide whether to update json config file. */ static int libxl__device_usbctrl_add_xenstore(libxl__gc *gc, uint32_t domid, libxl_device_usbctrl *usbctrl, @@ -121,6 +144,15 @@ static int libxl__device_usbctrl_add_xenstore(libxl__gc *gc, uint32_t domid, DEVICE_ADD(usbctrl, usbctrls, domid, &usbctrl_saved, COMPARE_USBCTRL, &d_config); + + if (usbctrl->type == LIBXL_USBCTRL_TYPE_QUSB) { + if (!libxl__query_qemu_backend(gc, domid, usbctrl->backend_domid, + "qusb", false)) { + LOG(ERROR, "backend type not supported by device model"); + rc = ERROR_FAIL; + goto out; + } + } } for (;;) { @@ -159,6 +191,18 @@ out: return rc; } +static char *pvusb_get_device_type(libxl_usbctrl_type type) +{ + switch (type) { + case LIBXL_USBCTRL_TYPE_PV: + return "vusb"; + case LIBXL_USBCTRL_TYPE_QUSB: + return "qusb"; + default: + return NULL; + } +} + /* AO operation to add a usb controller. * * Generally, it does: @@ -190,7 +234,8 @@ void libxl__device_usbctrl_add(libxl__egc *egc, uint32_t domid, } } - if (usbctrl->type != LIBXL_USBCTRL_TYPE_PV) { + if (usbctrl->type != LIBXL_USBCTRL_TYPE_PV && + usbctrl->type != LIBXL_USBCTRL_TYPE_QUSB) { LOG(ERROR, "Unsupported USB controller type"); rc = ERROR_FAIL; goto out; @@ -252,7 +297,8 @@ void libxl__initiate_device_usbctrl_remove(libxl__egc *egc, rc = libxl_device_usbctrl_getinfo(CTX, domid, &usbctrl, &usbctrlinfo); if (rc) goto out; - if (usbctrlinfo.type != LIBXL_USBCTRL_TYPE_PV) { + if (usbctrlinfo.type != LIBXL_USBCTRL_TYPE_PV && + usbctrlinfo.type != LIBXL_USBCTRL_TYPE_QUSB) { LOG(ERROR, "Unsupported USB controller type"); rc = ERROR_FAIL; goto out; @@ -293,6 +339,7 @@ static const char *vusb_be_from_xs_fe(libxl__gc *gc, const char *fe_path, const char *be_path; int r; uint32_t be_domid, fe_domid; + char be_type[16]; r = libxl__xs_read_checked(gc, XBT_NULL, GCSPRINTF("%s/backend", fe_path), &be_path); @@ -300,10 +347,10 @@ static const char *vusb_be_from_xs_fe(libxl__gc *gc, const char *fe_path, /* Check to see that it has the proper form, and that fe_domid == * target domid */ - r = sscanf(be_path, "/local/domain/%d/backend/vusb/%d", - &be_domid, &fe_domid); + r = sscanf(be_path, "/local/domain/%d/backend/%15[^/]/%d", + &be_domid, be_type, &fe_domid); - if (r != 2 || fe_domid != tgt_domid) { + if (r != 3 || fe_domid != tgt_domid) { LOG(ERROR, "Malformed backend, refusing to use"); return NULL; } @@ -740,8 +787,9 @@ libxl__device_usbdev_set_default_usbctrl(libxl__gc *gc, uint32_t domid, for (j = 0; j < usbctrls[i].ports; j++) { const char *path, *tmp; - path = GCSPRINTF("%s/backend/vusb/%d/%d/port/%d", + path = GCSPRINTF("%s/backend/%s/%d/%d/port/%d", libxl__xs_get_dompath(gc, LIBXL_TOOLSTACK_DOMID), + pvusb_get_device_type(usbctrls[i].type), domid, usbctrls[i].devid, j + 1); rc = libxl__xs_read_checked(gc, XBT_NULL, path, &tmp); if (rc) goto out; @@ -883,11 +931,12 @@ out: /* Add usb information to xenstore * - * Adding a usb device won't create new 'vusb' device, but only write + * Adding a usb device won't create new 'qusb'/'vusb' device, but only write * the device busid to the controller:port in xenstore. */ static int libxl__device_usbdev_add_xenstore(libxl__gc *gc, uint32_t domid, libxl_device_usbdev *usbdev, + libxl_usbctrl_type type, bool update_json) { char *be_path, *busid; @@ -931,8 +980,9 @@ static int libxl__device_usbdev_add_xenstore(libxl__gc *gc, uint32_t domid, if (rc) goto out; } - be_path = GCSPRINTF("%s/backend/vusb/%d/%d/port/%d", + be_path = GCSPRINTF("%s/backend/%s/%d/%d/port/%d", libxl__xs_get_dompath(gc, LIBXL_TOOLSTACK_DOMID), + pvusb_get_device_type(type), domid, usbdev->ctrl, usbdev->port); LOG(DEBUG, "Adding usb device %s to xenstore: controller %d, port %d", @@ -956,12 +1006,14 @@ out: } static int libxl__device_usbdev_remove_xenstore(libxl__gc *gc, uint32_t domid, - libxl_device_usbdev *usbdev) + libxl_device_usbdev *usbdev, + libxl_usbctrl_type type) { char *be_path; - be_path = GCSPRINTF("%s/backend/vusb/%d/%d/port/%d", + be_path = GCSPRINTF("%s/backend/%s/%d/%d/port/%d", libxl__xs_get_dompath(gc, LIBXL_TOOLSTACK_DOMID), + pvusb_get_device_type(type), domid, usbdev->ctrl, usbdev->port); LOG(DEBUG, "Removing usb device from xenstore: controller %d, port %d", @@ -971,12 +1023,14 @@ static int libxl__device_usbdev_remove_xenstore(libxl__gc *gc, uint32_t domid, } static char *usbdev_busid_from_ctrlport(libxl__gc *gc, uint32_t domid, - libxl_device_usbdev *usbdev) + libxl_device_usbdev *usbdev, + libxl_usbctrl_type type) { return libxl__xs_read(gc, XBT_NULL, - GCSPRINTF("%s/backend/vusb/%d/%d/port/%d", + GCSPRINTF("%s/backend/%s/%d/%d/port/%d", libxl__xs_get_dompath(gc, LIBXL_TOOLSTACK_DOMID), - domid, usbdev->ctrl, usbdev->port)); + pvusb_get_device_type(type), + domid, usbdev->ctrl, usbdev->port)); } /* get original driver path of usb interface, stored in @drvpath */ @@ -1333,14 +1387,24 @@ static int do_usbdev_add(libxl__gc *gc, uint32_t domid, goto out; } - rc = libxl__device_usbdev_add_xenstore(gc, domid, usbdev, update_json); + rc = libxl__device_usbdev_add_xenstore(gc, domid, usbdev, + LIBXL_USBCTRL_TYPE_PV, + update_json); if (rc) goto out; rc = usbback_dev_assign(gc, busid); if (rc) { - libxl__device_usbdev_remove_xenstore(gc, domid, usbdev); + libxl__device_usbdev_remove_xenstore(gc, domid, usbdev, + LIBXL_USBCTRL_TYPE_PV); goto out; } + break; + case LIBXL_USBCTRL_TYPE_QUSB: + rc = libxl__device_usbdev_add_xenstore(gc, domid, usbdev, + LIBXL_USBCTRL_TYPE_QUSB, + update_json); + if (rc) goto out; + break; case LIBXL_USBCTRL_TYPE_DEVICEMODEL: default: @@ -1458,7 +1522,7 @@ static int do_usbdev_remove(libxl__gc *gc, uint32_t domid, switch (usbctrlinfo.type) { case LIBXL_USBCTRL_TYPE_PV: - busid = usbdev_busid_from_ctrlport(gc, domid, usbdev); + busid = usbdev_busid_from_ctrlport(gc, domid, usbdev, usbctrlinfo.type); if (!busid) { rc = ERROR_FAIL; goto out; @@ -1483,7 +1547,8 @@ static int do_usbdev_remove(libxl__gc *gc, uint32_t domid, goto out; } - rc = libxl__device_usbdev_remove_xenstore(gc, domid, usbdev); + rc = libxl__device_usbdev_remove_xenstore(gc, domid, usbdev, + LIBXL_USBCTRL_TYPE_PV); if (rc) { LOG(ERROR, "Error removing device from guest." " Try running usbdev-detach again."); @@ -1498,6 +1563,12 @@ static int do_usbdev_remove(libxl__gc *gc, uint32_t domid, goto out; } + break; + case LIBXL_USBCTRL_TYPE_QUSB: + rc = libxl__device_usbdev_remove_xenstore(gc, domid, usbdev, + LIBXL_USBCTRL_TYPE_QUSB); + if (rc) goto out; + break; case LIBXL_USBCTRL_TYPE_DEVICEMODEL: default: @@ -1583,7 +1654,6 @@ int libxl_ctrlport_to_device_usbdev(libxl_ctx *ctx, dompath = libxl__xs_get_dompath(gc, domid); fe_path = GCSPRINTF("%s/device/vusb/%d", dompath, ctrl); - be_path = vusb_be_from_xs_fe(gc, fe_path, domid); if (!be_path) { rc = ERROR_FAIL; diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl index 17da9a7101..51905800e8 100644 --- a/tools/libxl/libxl_types.idl +++ b/tools/libxl/libxl_types.idl @@ -633,6 +633,7 @@ libxl_usbctrl_type = Enumeration("usbctrl_type", [ (0, "AUTO"), (1, "PV"), (2, "DEVICEMODEL"), + (3, "QUSB"), ]) libxl_usbdev_type = Enumeration("usbdev_type", [ diff --git a/tools/libxl/libxl_types_internal.idl b/tools/libxl/libxl_types_internal.idl index 696f5f8b4a..177f9b7a73 100644 --- a/tools/libxl/libxl_types_internal.idl +++ b/tools/libxl/libxl_types_internal.idl @@ -23,6 +23,7 @@ libxl__device_kind = Enumeration("device_kind", [ (7, "CONSOLE"), (8, "VTPM"), (9, "VUSB"), + (10, "QUSB"), ]) libxl__console_backend = Enumeration("console_backend", [