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;
}
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;
}
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;
}
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;
}
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;
}