Exemple #1
0
static int net_init(struct XenDevice *xendev)
{
    struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev);

    /* read xenstore entries */
    if (netdev->mac == NULL) {
        netdev->mac = xenstore_read_be_str(&netdev->xendev, "mac");
    }

    /* do we have all we need? */
    if (netdev->mac == NULL) {
        return -1;
    }

    if (net_parse_macaddr(netdev->conf.macaddr.a, netdev->mac) < 0) {
        return -1;
    }

    netdev->conf.vlan = qemu_find_vlan(netdev->xendev.dev, 1);
    netdev->conf.peer = NULL;

    netdev->nic = qemu_new_nic(&net_xen_info, &netdev->conf,
                               "xen", NULL, netdev);

    snprintf(netdev->nic->nc.info_str, sizeof(netdev->nic->nc.info_str),
             "nic: xenbus vif macaddr=%s", netdev->mac);

    /* fill info */
    xenstore_write_be_int(&netdev->xendev, "feature-rx-copy", 1);
    xenstore_write_be_int(&netdev->xendev, "feature-rx-flip", 0);

    return 0;
}
/*
 * Initial xendev setup.  Read frontend path, register watch for it.
 * Should succeed once xend finished setting up the backend device.
 *
 * Also sets initial state (-> Initializing) when done.  Which
 * only affects the xendev->be_state variable as xenbus should
 * already be put into that state by xend.
 */
static int xen_be_try_setup(struct XenDevice *xendev)
{
    char token[XEN_BUFSIZE];
    int be_state;

    if (xenstore_read_be_int(xendev, "state", &be_state) == -1) {
        xen_be_printf(xendev, 0, "reading backend state failed\n");
        return -1;
    }

    if (be_state != XenbusStateInitialising) {
        xen_be_printf(xendev, 0, "initial backend state is wrong (%s)\n",
                      xenbus_strstate(be_state));
        return -1;
    }

    xendev->fe = xenstore_read_be_str(xendev, "frontend");
    if (xendev->fe == NULL) {
        xen_be_printf(xendev, 0, "reading frontend path failed\n");
        return -1;
    }

    /* setup frontend watch */
    snprintf(token, sizeof(token), "fe:%p", xendev);
    if (!xs_watch(xenstore, xendev->fe, token)) {
        xen_be_printf(xendev, 0, "watching frontend path (%s) failed\n",
                      xendev->fe);
        return -1;
    }
    xen_be_set_state(xendev, XenbusStateInitialising);

    xen_be_backend_changed(xendev, NULL);
    xen_be_frontend_changed(xendev, NULL);
    return 0;
}
Exemple #3
0
static int net_init(struct XenDevice *xendev)
{
    struct XenNetDev *netdev = container_of(xendev, struct XenNetDev, xendev);
    VLANState *vlan;

    /* read xenstore entries */
    if (netdev->mac == NULL)
	netdev->mac = xenstore_read_be_str(&netdev->xendev, "mac");

    /* do we have all we need? */
    if (netdev->mac == NULL)
	return -1;

    vlan = qemu_find_vlan(netdev->xendev.dev, 1);
    netdev->vs = qemu_new_vlan_client(vlan, "xen", NULL,
                                      net_rx_ok, net_rx_packet, NULL,
                                      NULL, netdev);
    snprintf(netdev->vs->info_str, sizeof(netdev->vs->info_str),
             "nic: xenbus vif macaddr=%s", netdev->mac);

    /* fill info */
    xenstore_write_be_int(&netdev->xendev, "feature-rx-copy", 1);
    xenstore_write_be_int(&netdev->xendev, "feature-rx-flip", 0);

    return 0;
}
Exemple #4
0
static int blk_init(struct XenDevice *xendev)
{
    struct XenBlkDev *blkdev = container_of(xendev, struct XenBlkDev, xendev);
    int index, qflags, have_barriers, info = 0;
    char *h;

    /* read xenstore entries */
    if (blkdev->params == NULL) {
	blkdev->params = xenstore_read_be_str(&blkdev->xendev, "params");
        h = strchr(blkdev->params, ':');
	if (h != NULL) {
	    blkdev->fileproto = blkdev->params;
	    blkdev->filename  = h+1;
	    *h = 0;
	} else {
	    blkdev->fileproto = "<unset>";
	    blkdev->filename  = blkdev->params;
	}
    }
    if (blkdev->mode == NULL)
	blkdev->mode = xenstore_read_be_str(&blkdev->xendev, "mode");
    if (blkdev->type == NULL)
	blkdev->type = xenstore_read_be_str(&blkdev->xendev, "type");
    if (blkdev->dev == NULL)
	blkdev->dev = xenstore_read_be_str(&blkdev->xendev, "dev");
    if (blkdev->devtype == NULL)
	blkdev->devtype = xenstore_read_be_str(&blkdev->xendev, "device-type");

    /* do we have all we need? */
    if (blkdev->params == NULL ||
	blkdev->mode == NULL   ||
	blkdev->type == NULL   ||
	blkdev->dev == NULL)
	return -1;

    /* read-only ? */
    if (strcmp(blkdev->mode, "w") == 0) {
	qflags = BDRV_O_RDWR;
    } else {
	qflags = 0;
	info  |= VDISK_READONLY;
    }

    /* cdrom ? */
    if (blkdev->devtype && !strcmp(blkdev->devtype, "cdrom"))
	info  |= VDISK_CDROM;

    /* init qemu block driver */
    index = (blkdev->xendev.dev - 202 * 256) / 16;
    blkdev->dinfo = drive_get(IF_XEN, 0, index);
    if (!blkdev->dinfo) {
        /* setup via xenbus -> create new block driver instance */
        xen_be_printf(&blkdev->xendev, 2, "create new bdrv (xenbus setup)\n");
        blkdev->bs = bdrv_new(blkdev->dev);
        if (bdrv_open(blkdev->bs, blkdev->filename, qflags,
                      bdrv_find_whitelisted_format(blkdev->fileproto)) != 0) {
            bdrv_delete(blkdev->bs);
            return -1;
        }
    } else {
        /* setup via qemu cmdline -> already setup for us */
        xen_be_printf(&blkdev->xendev, 2, "get configured bdrv (cmdline setup)\n");
	blkdev->bs = blkdev->dinfo->bdrv;
    }
    blkdev->file_blk  = BLOCK_SIZE;
    blkdev->file_size = bdrv_getlength(blkdev->bs);
    if (blkdev->file_size < 0) {
        xen_be_printf(&blkdev->xendev, 1, "bdrv_getlength: %d (%s) | drv %s\n",
                      (int)blkdev->file_size, strerror(-blkdev->file_size),
                      blkdev->bs->drv ? blkdev->bs->drv->format_name : "-");
	blkdev->file_size = 0;
    }
    have_barriers = blkdev->bs->drv && blkdev->bs->drv->bdrv_flush ? 1 : 0;

    xen_be_printf(xendev, 1, "type \"%s\", fileproto \"%s\", filename \"%s\","
		  " size %" PRId64 " (%" PRId64 " MB)\n",
		  blkdev->type, blkdev->fileproto, blkdev->filename,
		  blkdev->file_size, blkdev->file_size >> 20);

    /* fill info */
    xenstore_write_be_int(&blkdev->xendev, "feature-barrier", have_barriers);
    xenstore_write_be_int(&blkdev->xendev, "info",            info);
    xenstore_write_be_int(&blkdev->xendev, "sector-size",     blkdev->file_blk);
    xenstore_write_be_int(&blkdev->xendev, "sectors",
			  blkdev->file_size / blkdev->file_blk);
    return 0;
}
Exemple #5
0
static int blk_init(struct XenDevice *xendev)
{
    struct XenBlkDev *blkdev = container_of(xendev, struct XenBlkDev, xendev);
    int info = 0;
    char *directiosafe = NULL;

    trace_xen_disk_init(xendev->name);

    /* read xenstore entries */
    if (blkdev->params == NULL) {
        char *h = NULL;
        blkdev->params = xenstore_read_be_str(xendev, "params");
        if (blkdev->params != NULL) {
            h = strchr(blkdev->params, ':');
        }
        if (h != NULL) {
            blkdev->fileproto = blkdev->params;
            blkdev->filename  = h+1;
            *h = 0;
        } else {
            blkdev->fileproto = "<unset>";
            blkdev->filename  = blkdev->params;
        }
    }
    if (!strcmp("aio", blkdev->fileproto)) {
        blkdev->fileproto = "raw";
    }
    if (!strcmp("vhd", blkdev->fileproto)) {
        blkdev->fileproto = "vpc";
    }
    if (blkdev->mode == NULL) {
        blkdev->mode = xenstore_read_be_str(xendev, "mode");
    }
    if (blkdev->type == NULL) {
        blkdev->type = xenstore_read_be_str(xendev, "type");
    }
    if (blkdev->dev == NULL) {
        blkdev->dev = xenstore_read_be_str(xendev, "dev");
    }
    if (blkdev->devtype == NULL) {
        blkdev->devtype = xenstore_read_be_str(xendev, "device-type");
    }
    directiosafe = xenstore_read_be_str(xendev, "direct-io-safe");
    blkdev->directiosafe = (directiosafe && atoi(directiosafe));

    /* do we have all we need? */
    if (blkdev->params == NULL ||
        blkdev->mode == NULL   ||
        blkdev->type == NULL   ||
        blkdev->dev == NULL) {
        goto out_error;
    }

    /* read-only ? */
    if (strcmp(blkdev->mode, "w")) {
        info  |= VDISK_READONLY;
    }

    /* cdrom ? */
    if (blkdev->devtype && !strcmp(blkdev->devtype, "cdrom")) {
        info  |= VDISK_CDROM;
    }

    blkdev->file_blk  = BLOCK_SIZE;

    /* fill info
     * blk_connect supplies sector-size and sectors
     */
    xenstore_write_be_int(xendev, "feature-flush-cache", 1);
    xenstore_write_be_int(xendev, "info", info);

    xenstore_write_be_int(xendev, "max-ring-page-order",
                          MAX_RING_PAGE_ORDER);

    blk_parse_discard(blkdev);

    g_free(directiosafe);
    return 0;

out_error:
    g_free(blkdev->params);
    blkdev->params = NULL;
    g_free(blkdev->mode);
    blkdev->mode = NULL;
    g_free(blkdev->type);
    blkdev->type = NULL;
    g_free(blkdev->dev);
    blkdev->dev = NULL;
    g_free(blkdev->devtype);
    blkdev->devtype = NULL;
    g_free(directiosafe);
    blkdev->directiosafe = false;
    return -1;
}
Exemple #6
0
static int xen_9pfs_connect(struct XenLegacyDevice *xendev)
{
    Error *err = NULL;
    int i;
    Xen9pfsDev *xen_9pdev = container_of(xendev, Xen9pfsDev, xendev);
    V9fsState *s = &xen_9pdev->state;
    QemuOpts *fsdev;

    if (xenstore_read_fe_int(&xen_9pdev->xendev, "num-rings",
                             &xen_9pdev->num_rings) == -1 ||
        xen_9pdev->num_rings > MAX_RINGS || xen_9pdev->num_rings < 1) {
        return -1;
    }

    xen_9pdev->rings = g_new0(Xen9pfsRing, xen_9pdev->num_rings);
    for (i = 0; i < xen_9pdev->num_rings; i++) {
        char *str;
        int ring_order;

        xen_9pdev->rings[i].priv = xen_9pdev;
        xen_9pdev->rings[i].evtchn = -1;
        xen_9pdev->rings[i].local_port = -1;

        str = g_strdup_printf("ring-ref%u", i);
        if (xenstore_read_fe_int(&xen_9pdev->xendev, str,
                                 &xen_9pdev->rings[i].ref) == -1) {
            g_free(str);
            goto out;
        }
        g_free(str);
        str = g_strdup_printf("event-channel-%u", i);
        if (xenstore_read_fe_int(&xen_9pdev->xendev, str,
                                 &xen_9pdev->rings[i].evtchn) == -1) {
            g_free(str);
            goto out;
        }
        g_free(str);

        xen_9pdev->rings[i].intf =
            xen_be_map_grant_ref(&xen_9pdev->xendev,
                                 xen_9pdev->rings[i].ref,
                                 PROT_READ | PROT_WRITE);
        if (!xen_9pdev->rings[i].intf) {
            goto out;
        }
        ring_order = xen_9pdev->rings[i].intf->ring_order;
        if (ring_order > MAX_RING_ORDER) {
            goto out;
        }
        xen_9pdev->rings[i].ring_order = ring_order;
        xen_9pdev->rings[i].data =
            xen_be_map_grant_refs(&xen_9pdev->xendev,
                                  xen_9pdev->rings[i].intf->ref,
                                  (1 << ring_order),
                                  PROT_READ | PROT_WRITE);
        if (!xen_9pdev->rings[i].data) {
            goto out;
        }
        xen_9pdev->rings[i].ring.in = xen_9pdev->rings[i].data;
        xen_9pdev->rings[i].ring.out = xen_9pdev->rings[i].data +
                                       XEN_FLEX_RING_SIZE(ring_order);

        xen_9pdev->rings[i].bh = qemu_bh_new(xen_9pfs_bh, &xen_9pdev->rings[i]);
        xen_9pdev->rings[i].out_cons = 0;
        xen_9pdev->rings[i].out_size = 0;
        xen_9pdev->rings[i].inprogress = false;


        xen_9pdev->rings[i].evtchndev = xenevtchn_open(NULL, 0);
        if (xen_9pdev->rings[i].evtchndev == NULL) {
            goto out;
        }
        qemu_set_cloexec(xenevtchn_fd(xen_9pdev->rings[i].evtchndev));
        xen_9pdev->rings[i].local_port = xenevtchn_bind_interdomain
                                            (xen_9pdev->rings[i].evtchndev,
                                             xendev->dom,
                                             xen_9pdev->rings[i].evtchn);
        if (xen_9pdev->rings[i].local_port == -1) {
            xen_pv_printf(xendev, 0,
                          "xenevtchn_bind_interdomain failed port=%d\n",
                          xen_9pdev->rings[i].evtchn);
            goto out;
        }
        xen_pv_printf(xendev, 2, "bind evtchn port %d\n", xendev->local_port);
        qemu_set_fd_handler(xenevtchn_fd(xen_9pdev->rings[i].evtchndev),
                xen_9pfs_evtchn_event, NULL, &xen_9pdev->rings[i]);
    }

    xen_9pdev->security_model = xenstore_read_be_str(xendev, "security_model");
    xen_9pdev->path = xenstore_read_be_str(xendev, "path");
    xen_9pdev->id = s->fsconf.fsdev_id =
        g_strdup_printf("xen9p%d", xendev->dev);
    xen_9pdev->tag = s->fsconf.tag = xenstore_read_fe_str(xendev, "tag");
    fsdev = qemu_opts_create(qemu_find_opts("fsdev"),
            s->fsconf.tag,
            1, NULL);
    qemu_opt_set(fsdev, "fsdriver", "local", NULL);
    qemu_opt_set(fsdev, "path", xen_9pdev->path, NULL);
    qemu_opt_set(fsdev, "security_model", xen_9pdev->security_model, NULL);
    qemu_opts_set_id(fsdev, s->fsconf.fsdev_id);
    qemu_fsdev_add(fsdev, &err);
    if (err) {
        error_report_err(err);
    }
    v9fs_device_realize_common(s, &xen_9p_transport, NULL);

    return 0;

out:
    xen_9pfs_free(xendev);
    return -1;
}