1 #include "hw/xen/xen_backend.h" 2 #include "sysemu/block-backend.h" 3 #include "sysemu/blockdev.h" 4 5 /* ------------------------------------------------------------- */ 6 7 struct xs_dirs { 8 char *xs_dir; 9 QTAILQ_ENTRY(xs_dirs) list; 10 }; 11 static QTAILQ_HEAD(xs_dirs_head, xs_dirs) xs_cleanup = QTAILQ_HEAD_INITIALIZER(xs_cleanup); 12 13 static void xen_config_cleanup_dir(char *dir) 14 { 15 struct xs_dirs *d; 16 17 d = g_malloc(sizeof(*d)); 18 d->xs_dir = dir; 19 QTAILQ_INSERT_TAIL(&xs_cleanup, d, list); 20 } 21 22 void xen_config_cleanup(void) 23 { 24 struct xs_dirs *d; 25 26 QTAILQ_FOREACH(d, &xs_cleanup, list) { 27 xs_rm(xenstore, 0, d->xs_dir); 28 } 29 } 30 31 /* ------------------------------------------------------------- */ 32 33 static int xen_config_dev_mkdir(char *dev, int p) 34 { 35 struct xs_permissions perms[2] = {{ 36 .id = 0, /* set owner: dom0 */ 37 },{ 38 .id = xen_domid, 39 .perms = p, 40 }}; 41 42 if (!xs_mkdir(xenstore, 0, dev)) { 43 xen_be_printf(NULL, 0, "xs_mkdir %s: failed\n", dev); 44 return -1; 45 } 46 xen_config_cleanup_dir(g_strdup(dev)); 47 48 if (!xs_set_permissions(xenstore, 0, dev, perms, 2)) { 49 xen_be_printf(NULL, 0, "xs_set_permissions %s: failed\n", dev); 50 return -1; 51 } 52 return 0; 53 } 54 55 static int xen_config_dev_dirs(const char *ftype, const char *btype, int vdev, 56 char *fe, char *be, int len) 57 { 58 char *dom; 59 60 dom = xs_get_domain_path(xenstore, xen_domid); 61 snprintf(fe, len, "%s/device/%s/%d", dom, ftype, vdev); 62 free(dom); 63 64 dom = xs_get_domain_path(xenstore, 0); 65 snprintf(be, len, "%s/backend/%s/%d/%d", dom, btype, xen_domid, vdev); 66 free(dom); 67 68 xen_config_dev_mkdir(fe, XS_PERM_READ | XS_PERM_WRITE); 69 xen_config_dev_mkdir(be, XS_PERM_READ); 70 return 0; 71 } 72 73 static int xen_config_dev_all(char *fe, char *be) 74 { 75 /* frontend */ 76 if (xen_protocol) 77 xenstore_write_str(fe, "protocol", xen_protocol); 78 79 xenstore_write_int(fe, "state", XenbusStateInitialising); 80 xenstore_write_int(fe, "backend-id", 0); 81 xenstore_write_str(fe, "backend", be); 82 83 /* backend */ 84 xenstore_write_str(be, "domain", qemu_name ? qemu_name : "no-name"); 85 xenstore_write_int(be, "online", 1); 86 xenstore_write_int(be, "state", XenbusStateInitialising); 87 xenstore_write_int(be, "frontend-id", xen_domid); 88 xenstore_write_str(be, "frontend", fe); 89 90 return 0; 91 } 92 93 /* ------------------------------------------------------------- */ 94 95 int xen_config_dev_blk(DriveInfo *disk) 96 { 97 char fe[256], be[256], device_name[32]; 98 int vdev = 202 * 256 + 16 * disk->unit; 99 int cdrom = disk->media_cd; 100 const char *devtype = cdrom ? "cdrom" : "disk"; 101 const char *mode = cdrom ? "r" : "w"; 102 const char *filename = qemu_opt_get(disk->opts, "file"); 103 104 snprintf(device_name, sizeof(device_name), "xvd%c", 'a' + disk->unit); 105 xen_be_printf(NULL, 1, "config disk %d [%s]: %s\n", 106 disk->unit, device_name, filename); 107 xen_config_dev_dirs("vbd", "qdisk", vdev, fe, be, sizeof(fe)); 108 109 /* frontend */ 110 xenstore_write_int(fe, "virtual-device", vdev); 111 xenstore_write_str(fe, "device-type", devtype); 112 113 /* backend */ 114 xenstore_write_str(be, "dev", device_name); 115 xenstore_write_str(be, "type", "file"); 116 xenstore_write_str(be, "params", filename); 117 xenstore_write_str(be, "mode", mode); 118 119 /* common stuff */ 120 return xen_config_dev_all(fe, be); 121 } 122 123 int xen_config_dev_nic(NICInfo *nic) 124 { 125 char fe[256], be[256]; 126 char mac[20]; 127 int vlan_id = -1; 128 129 net_hub_id_for_client(nic->netdev, &vlan_id); 130 snprintf(mac, sizeof(mac), "%02x:%02x:%02x:%02x:%02x:%02x", 131 nic->macaddr.a[0], nic->macaddr.a[1], nic->macaddr.a[2], 132 nic->macaddr.a[3], nic->macaddr.a[4], nic->macaddr.a[5]); 133 xen_be_printf(NULL, 1, "config nic %d: mac=\"%s\"\n", vlan_id, mac); 134 xen_config_dev_dirs("vif", "qnic", vlan_id, fe, be, sizeof(fe)); 135 136 /* frontend */ 137 xenstore_write_int(fe, "handle", vlan_id); 138 xenstore_write_str(fe, "mac", mac); 139 140 /* backend */ 141 xenstore_write_int(be, "handle", vlan_id); 142 xenstore_write_str(be, "mac", mac); 143 144 /* common stuff */ 145 return xen_config_dev_all(fe, be); 146 } 147 148 int xen_config_dev_vfb(int vdev, const char *type) 149 { 150 char fe[256], be[256]; 151 152 xen_config_dev_dirs("vfb", "vfb", vdev, fe, be, sizeof(fe)); 153 154 /* backend */ 155 xenstore_write_str(be, "type", type); 156 157 /* common stuff */ 158 return xen_config_dev_all(fe, be); 159 } 160 161 int xen_config_dev_vkbd(int vdev) 162 { 163 char fe[256], be[256]; 164 165 xen_config_dev_dirs("vkbd", "vkbd", vdev, fe, be, sizeof(fe)); 166 return xen_config_dev_all(fe, be); 167 } 168 169 int xen_config_dev_console(int vdev) 170 { 171 char fe[256], be[256]; 172 173 xen_config_dev_dirs("console", "console", vdev, fe, be, sizeof(fe)); 174 return xen_config_dev_all(fe, be); 175 } 176