root / hw / xen_devconfig.c @ 9c17d615
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#include "xen_backend.h" |
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#include "sysemu/blockdev.h" |
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/* ------------------------------------------------------------- */
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struct xs_dirs {
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char *xs_dir;
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QTAILQ_ENTRY(xs_dirs) list; |
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}; |
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static QTAILQ_HEAD(xs_dirs_head, xs_dirs) xs_cleanup = QTAILQ_HEAD_INITIALIZER(xs_cleanup);
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static void xen_config_cleanup_dir(char *dir) |
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{ |
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struct xs_dirs *d;
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d = g_malloc(sizeof(*d));
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d->xs_dir = dir; |
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QTAILQ_INSERT_TAIL(&xs_cleanup, d, list); |
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} |
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void xen_config_cleanup(void) |
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{ |
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struct xs_dirs *d;
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QTAILQ_FOREACH(d, &xs_cleanup, list) { |
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xs_rm(xenstore, 0, d->xs_dir);
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} |
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} |
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/* ------------------------------------------------------------- */
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static int xen_config_dev_mkdir(char *dev, int p) |
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{ |
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struct xs_permissions perms[2] = {{ |
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.id = 0, /* set owner: dom0 */ |
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},{ |
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.id = xen_domid, |
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.perms = p, |
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}}; |
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if (!xs_mkdir(xenstore, 0, dev)) { |
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xen_be_printf(NULL, 0, "xs_mkdir %s: failed\n", dev); |
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return -1; |
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} |
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xen_config_cleanup_dir(g_strdup(dev)); |
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if (!xs_set_permissions(xenstore, 0, dev, perms, 2)) { |
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xen_be_printf(NULL, 0, "xs_set_permissions %s: failed\n", dev); |
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return -1; |
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} |
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return 0; |
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} |
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static int xen_config_dev_dirs(const char *ftype, const char *btype, int vdev, |
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char *fe, char *be, int len) |
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{ |
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char *dom;
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dom = xs_get_domain_path(xenstore, xen_domid); |
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snprintf(fe, len, "%s/device/%s/%d", dom, ftype, vdev);
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free(dom); |
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dom = xs_get_domain_path(xenstore, 0);
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snprintf(be, len, "%s/backend/%s/%d/%d", dom, btype, xen_domid, vdev);
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free(dom); |
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xen_config_dev_mkdir(fe, XS_PERM_READ | XS_PERM_WRITE); |
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xen_config_dev_mkdir(be, XS_PERM_READ); |
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return 0; |
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} |
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static int xen_config_dev_all(char *fe, char *be) |
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{ |
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/* frontend */
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if (xen_protocol)
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xenstore_write_str(fe, "protocol", xen_protocol);
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xenstore_write_int(fe, "state", XenbusStateInitialising);
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xenstore_write_int(fe, "backend-id", 0); |
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xenstore_write_str(fe, "backend", be);
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/* backend */
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xenstore_write_str(be, "domain", qemu_name ? qemu_name : "no-name"); |
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xenstore_write_int(be, "online", 1); |
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xenstore_write_int(be, "state", XenbusStateInitialising);
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xenstore_write_int(be, "frontend-id", xen_domid);
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xenstore_write_str(be, "frontend", fe);
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return 0; |
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} |
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/* ------------------------------------------------------------- */
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int xen_config_dev_blk(DriveInfo *disk)
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{ |
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char fe[256], be[256], device_name[32]; |
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int vdev = 202 * 256 + 16 * disk->unit; |
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int cdrom = disk->media_cd;
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const char *devtype = cdrom ? "cdrom" : "disk"; |
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const char *mode = cdrom ? "r" : "w"; |
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const char *filename = qemu_opt_get(disk->opts, "file"); |
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snprintf(device_name, sizeof(device_name), "xvd%c", 'a' + disk->unit); |
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xen_be_printf(NULL, 1, "config disk %d [%s]: %s\n", |
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disk->unit, device_name, filename); |
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xen_config_dev_dirs("vbd", "qdisk", vdev, fe, be, sizeof(fe)); |
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/* frontend */
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xenstore_write_int(fe, "virtual-device", vdev);
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xenstore_write_str(fe, "device-type", devtype);
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/* backend */
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xenstore_write_str(be, "dev", device_name);
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xenstore_write_str(be, "type", "file"); |
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xenstore_write_str(be, "params", filename);
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xenstore_write_str(be, "mode", mode);
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/* common stuff */
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return xen_config_dev_all(fe, be);
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} |
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int xen_config_dev_nic(NICInfo *nic)
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{ |
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char fe[256], be[256]; |
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char mac[20]; |
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int vlan_id = -1; |
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net_hub_id_for_client(nic->netdev, &vlan_id); |
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snprintf(mac, sizeof(mac), "%02x:%02x:%02x:%02x:%02x:%02x", |
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nic->macaddr.a[0], nic->macaddr.a[1], nic->macaddr.a[2], |
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nic->macaddr.a[3], nic->macaddr.a[4], nic->macaddr.a[5]); |
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xen_be_printf(NULL, 1, "config nic %d: mac=\"%s\"\n", vlan_id, mac); |
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xen_config_dev_dirs("vif", "qnic", vlan_id, fe, be, sizeof(fe)); |
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/* frontend */
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xenstore_write_int(fe, "handle", vlan_id);
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xenstore_write_str(fe, "mac", mac);
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/* backend */
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xenstore_write_int(be, "handle", vlan_id);
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xenstore_write_str(be, "mac", mac);
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/* common stuff */
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return xen_config_dev_all(fe, be);
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} |
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int xen_config_dev_vfb(int vdev, const char *type) |
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{ |
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char fe[256], be[256]; |
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xen_config_dev_dirs("vfb", "vfb", vdev, fe, be, sizeof(fe)); |
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/* backend */
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xenstore_write_str(be, "type", type);
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/* common stuff */
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return xen_config_dev_all(fe, be);
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} |
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int xen_config_dev_vkbd(int vdev) |
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{ |
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char fe[256], be[256]; |
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xen_config_dev_dirs("vkbd", "vkbd", vdev, fe, be, sizeof(fe)); |
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return xen_config_dev_all(fe, be);
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} |
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int xen_config_dev_console(int vdev) |
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{ |
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char fe[256], be[256]; |
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xen_config_dev_dirs("console", "console", vdev, fe, be, sizeof(fe)); |
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return xen_config_dev_all(fe, be);
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} |