xen_devconfig.c (3934B)
1 #include "qemu/osdep.h" 2 #include "hw/xen/xen-legacy-backend.h" 3 #include "qemu/option.h" 4 #include "sysemu/blockdev.h" 5 #include "sysemu/sysemu.h" 6 7 /* ------------------------------------------------------------- */ 8 9 static int xen_config_dev_dirs(const char *ftype, const char *btype, int vdev, 10 char *fe, char *be, int len) 11 { 12 char *dom; 13 14 dom = xs_get_domain_path(xenstore, xen_domid); 15 snprintf(fe, len, "%s/device/%s/%d", dom, ftype, vdev); 16 free(dom); 17 18 dom = xs_get_domain_path(xenstore, 0); 19 snprintf(be, len, "%s/backend/%s/%d/%d", dom, btype, xen_domid, vdev); 20 free(dom); 21 22 xenstore_mkdir(fe, XS_PERM_READ | XS_PERM_WRITE); 23 xenstore_mkdir(be, XS_PERM_READ); 24 return 0; 25 } 26 27 static int xen_config_dev_all(char *fe, char *be) 28 { 29 /* frontend */ 30 if (xen_protocol) 31 xenstore_write_str(fe, "protocol", xen_protocol); 32 33 xenstore_write_int(fe, "state", XenbusStateInitialising); 34 xenstore_write_int(fe, "backend-id", 0); 35 xenstore_write_str(fe, "backend", be); 36 37 /* backend */ 38 xenstore_write_str(be, "domain", qemu_name ? qemu_name : "no-name"); 39 xenstore_write_int(be, "online", 1); 40 xenstore_write_int(be, "state", XenbusStateInitialising); 41 xenstore_write_int(be, "frontend-id", xen_domid); 42 xenstore_write_str(be, "frontend", fe); 43 44 return 0; 45 } 46 47 /* ------------------------------------------------------------- */ 48 49 int xen_config_dev_blk(DriveInfo *disk) 50 { 51 char fe[256], be[256], device_name[32]; 52 int vdev = 202 * 256 + 16 * disk->unit; 53 int cdrom = disk->media_cd; 54 const char *devtype = cdrom ? "cdrom" : "disk"; 55 const char *mode = cdrom ? "r" : "w"; 56 const char *filename = qemu_opt_get(disk->opts, "file"); 57 58 snprintf(device_name, sizeof(device_name), "xvd%c", 'a' + disk->unit); 59 xen_pv_printf(NULL, 1, "config disk %d [%s]: %s\n", 60 disk->unit, device_name, filename); 61 xen_config_dev_dirs("vbd", "qdisk", vdev, fe, be, sizeof(fe)); 62 63 /* frontend */ 64 xenstore_write_int(fe, "virtual-device", vdev); 65 xenstore_write_str(fe, "device-type", devtype); 66 67 /* backend */ 68 xenstore_write_str(be, "dev", device_name); 69 xenstore_write_str(be, "type", "file"); 70 xenstore_write_str(be, "params", filename); 71 xenstore_write_str(be, "mode", mode); 72 73 /* common stuff */ 74 return xen_config_dev_all(fe, be); 75 } 76 77 int xen_config_dev_nic(NICInfo *nic) 78 { 79 char fe[256], be[256]; 80 char mac[20]; 81 int vlan_id = -1; 82 83 net_hub_id_for_client(nic->netdev, &vlan_id); 84 snprintf(mac, sizeof(mac), "%02x:%02x:%02x:%02x:%02x:%02x", 85 nic->macaddr.a[0], nic->macaddr.a[1], nic->macaddr.a[2], 86 nic->macaddr.a[3], nic->macaddr.a[4], nic->macaddr.a[5]); 87 xen_pv_printf(NULL, 1, "config nic %d: mac=\"%s\"\n", vlan_id, mac); 88 xen_config_dev_dirs("vif", "qnic", vlan_id, fe, be, sizeof(fe)); 89 90 /* frontend */ 91 xenstore_write_int(fe, "handle", vlan_id); 92 xenstore_write_str(fe, "mac", mac); 93 94 /* backend */ 95 xenstore_write_int(be, "handle", vlan_id); 96 xenstore_write_str(be, "mac", mac); 97 98 /* common stuff */ 99 return xen_config_dev_all(fe, be); 100 } 101 102 int xen_config_dev_vfb(int vdev, const char *type) 103 { 104 char fe[256], be[256]; 105 106 xen_config_dev_dirs("vfb", "vfb", vdev, fe, be, sizeof(fe)); 107 108 /* backend */ 109 xenstore_write_str(be, "type", type); 110 111 /* common stuff */ 112 return xen_config_dev_all(fe, be); 113 } 114 115 int xen_config_dev_vkbd(int vdev) 116 { 117 char fe[256], be[256]; 118 119 xen_config_dev_dirs("vkbd", "vkbd", vdev, fe, be, sizeof(fe)); 120 return xen_config_dev_all(fe, be); 121 } 122 123 int xen_config_dev_console(int vdev) 124 { 125 char fe[256], be[256]; 126 127 xen_config_dev_dirs("console", "console", vdev, fe, be, sizeof(fe)); 128 return xen_config_dev_all(fe, be); 129 }