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-rw-r--r--hw/xen_backend.c1
-rw-r--r--hw/xen_backend.h8
-rw-r--r--hw/xen_devconfig.c142
-rw-r--r--hw/xen_machine_pv.c19
4 files changed, 170 insertions, 0 deletions
diff --git a/hw/xen_backend.c b/hw/xen_backend.c
index c1e3728..2f2ec7f 100644
--- a/hw/xen_backend.c
+++ b/hw/xen_backend.c
@@ -45,6 +45,7 @@
/* public */
int xen_xc;
struct xs_handle *xenstore = NULL;
+const char *xen_protocol;
/* private */
static TAILQ_HEAD(XenDeviceHead, XenDevice) xendevs = TAILQ_HEAD_INITIALIZER(xendevs);
diff --git a/hw/xen_backend.h b/hw/xen_backend.h
index 4e4be14..7f1804e 100644
--- a/hw/xen_backend.h
+++ b/hw/xen_backend.h
@@ -3,6 +3,8 @@
#include "xen_common.h"
#include "sysemu.h"
+#include "net.h"
+#include "block_int.h"
/* ------------------------------------------------------------- */
@@ -56,6 +58,7 @@ struct XenDevice {
/* variables */
extern int xen_xc;
extern struct xs_handle *xenstore;
+extern const char *xen_protocol;
/* xenstore helper functions */
int xenstore_write_str(const char *base, const char *node, const char *val);
@@ -93,4 +96,9 @@ extern struct XenDevOps xen_netdev_ops; /* xen_nic.c */
void xen_init_display(int domid);
+/* configuration (aka xenbus setup) */
+void xen_config_cleanup(void);
+int xen_config_dev_blk(DriveInfo *disk);
+int xen_config_dev_nic(NICInfo *nic);
+
#endif /* QEMU_HW_XEN_BACKEND_H */
diff --git a/hw/xen_devconfig.c b/hw/xen_devconfig.c
new file mode 100644
index 0000000..4420561
--- /dev/null
+++ b/hw/xen_devconfig.c
@@ -0,0 +1,142 @@
+#include "xen_backend.h"
+
+/* ------------------------------------------------------------- */
+
+struct xs_dirs {
+ char *xs_dir;
+ TAILQ_ENTRY(xs_dirs) list;
+};
+static TAILQ_HEAD(xs_dirs_head, xs_dirs) xs_cleanup = TAILQ_HEAD_INITIALIZER(xs_cleanup);
+
+static void xen_config_cleanup_dir(char *dir)
+{
+ struct xs_dirs *d;
+
+ d = qemu_malloc(sizeof(*d));
+ d->xs_dir = dir;
+ TAILQ_INSERT_TAIL(&xs_cleanup, d, list);
+}
+
+void xen_config_cleanup(void)
+{
+ struct xs_dirs *d;
+
+ TAILQ_FOREACH(d, &xs_cleanup, list) {
+ xs_rm(xenstore, 0, d->xs_dir);
+ }
+}
+
+/* ------------------------------------------------------------- */
+
+static int xen_config_dev_mkdir(char *dev, int p)
+{
+ struct xs_permissions perms[2] = {{
+ .id = 0, /* set owner: dom0 */
+ },{
+ .id = xen_domid,
+ .perms = p,
+ }};
+
+ if (!xs_mkdir(xenstore, 0, dev)) {
+ xen_be_printf(NULL, 0, "xs_mkdir %s: failed\n", dev);
+ return -1;
+ }
+ xen_config_cleanup_dir(qemu_strdup(dev));
+
+ if (!xs_set_permissions(xenstore, 0, dev, perms, 2)) {
+ xen_be_printf(NULL, 0, "xs_set_permissions %s: failed\n", dev);
+ return -1;
+ }
+ return 0;
+}
+
+static int xen_config_dev_dirs(const char *ftype, const char *btype, int vdev,
+ char *fe, char *be, int len)
+{
+ char *dom;
+
+ dom = xs_get_domain_path(xenstore, xen_domid);
+ snprintf(fe, len, "%s/device/%s/%d", dom, ftype, vdev);
+ free(dom);
+
+ dom = xs_get_domain_path(xenstore, 0);
+ snprintf(be, len, "%s/backend/%s/%d/%d", dom, btype, xen_domid, vdev);
+ free(dom);
+
+ xen_config_dev_mkdir(fe, XS_PERM_READ | XS_PERM_WRITE);
+ xen_config_dev_mkdir(be, XS_PERM_READ);
+ return 0;
+}
+
+static int xen_config_dev_all(char *fe, char *be)
+{
+ /* frontend */
+ if (xen_protocol)
+ xenstore_write_str(fe, "protocol", xen_protocol);
+
+ xenstore_write_int(fe, "state", XenbusStateInitialising);
+ xenstore_write_int(fe, "backend-id", 0);
+ xenstore_write_str(fe, "backend", be);
+
+ /* backend */
+ xenstore_write_str(be, "domain", qemu_name ? qemu_name : "no-name");
+ xenstore_write_int(be, "online", 1);
+ xenstore_write_int(be, "state", XenbusStateInitialising);
+ xenstore_write_int(be, "frontend-id", xen_domid);
+ xenstore_write_str(be, "frontend", fe);
+
+ return 0;
+}
+
+/* ------------------------------------------------------------- */
+
+int xen_config_dev_blk(DriveInfo *disk)
+{
+ char fe[256], be[256];
+ int vdev = 202 * 256 + 16 * disk->unit;
+ int cdrom = disk->bdrv->type == BDRV_TYPE_CDROM;
+ const char *devtype = cdrom ? "cdrom" : "disk";
+ const char *mode = cdrom ? "r" : "w";
+
+ snprintf(disk->bdrv->device_name, sizeof(disk->bdrv->device_name),
+ "xvd%c", 'a' + disk->unit);
+ xen_be_printf(NULL, 1, "config disk %d [%s]: %s\n",
+ disk->unit, disk->bdrv->device_name, disk->bdrv->filename);
+ xen_config_dev_dirs("vbd", "qdisk", vdev, fe, be, sizeof(fe));
+
+ /* frontend */
+ xenstore_write_int(fe, "virtual-device", vdev);
+ xenstore_write_str(fe, "device-type", devtype);
+
+ /* backend */
+ xenstore_write_str(be, "dev", disk->bdrv->device_name);
+ xenstore_write_str(be, "type", "file");
+ xenstore_write_str(be, "params", disk->bdrv->filename);
+ xenstore_write_str(be, "mode", mode);
+
+ /* common stuff */
+ return xen_config_dev_all(fe, be);
+}
+
+int xen_config_dev_nic(NICInfo *nic)
+{
+ char fe[256], be[256];
+ char mac[20];
+
+ snprintf(mac, sizeof(mac), "%02x:%02x:%02x:%02x:%02x:%02x",
+ nic->macaddr[0], nic->macaddr[1], nic->macaddr[2],
+ nic->macaddr[3], nic->macaddr[4], nic->macaddr[5]);
+ xen_be_printf(NULL, 1, "config nic %d: mac=\"%s\"\n", nic->vlan->id, mac);
+ xen_config_dev_dirs("vif", "qnic", nic->vlan->id, fe, be, sizeof(fe));
+
+ /* frontend */
+ xenstore_write_int(fe, "handle", nic->vlan->id);
+ xenstore_write_str(fe, "mac", mac);
+
+ /* backend */
+ xenstore_write_int(be, "handle", nic->vlan->id);
+ xenstore_write_str(be, "mac", mac);
+
+ /* common stuff */
+ return xen_config_dev_all(fe, be);
+}
diff --git a/hw/xen_machine_pv.c b/hw/xen_machine_pv.c
index c21617a..154cf71 100644
--- a/hw/xen_machine_pv.c
+++ b/hw/xen_machine_pv.c
@@ -39,6 +39,7 @@ static void xen_init_pv(ram_addr_t ram_size, int vga_ram_size,
const char *cpu_model)
{
CPUState *env;
+ int i, index;
/* Initialize a dummy CPU */
if (cpu_model == NULL) {
@@ -62,6 +63,24 @@ static void xen_init_pv(ram_addr_t ram_size, int vga_ram_size,
xen_be_register("qdisk", &xen_blkdev_ops);
xen_be_register("qnic", &xen_netdev_ops);
+ /* configure disks */
+ for (i = 0; i < 16; i++) {
+ index = drive_get_index(IF_XEN, 0, i);
+ if (index == -1)
+ continue;
+ xen_config_dev_blk(drives_table + index);
+ }
+
+ /* configure nics */
+ for (i = 0; i < nb_nics; i++) {
+ if (!nd_table[i].model || 0 != strcmp(nd_table[i].model, "xen"))
+ continue;
+ xen_config_dev_nic(nd_table + i);
+ }
+
+ /* config cleanup hook */
+ atexit(xen_config_cleanup);
+
/* setup framebuffer */
xen_init_display(xen_domid);
}
generated by cgit v1.1 at 2024-12-29 03:34:05 +0000