1 #include "qemu/osdep.h"
2 #include "hw/xen/xen_backend.h"
3 #include "xen_domainbuild.h"
4 #include "qemu/timer.h"
9 static int xenstore_domain_mkdir(char *path)
11 struct xs_permissions perms_ro[] = {{
12 .id = 0, /* set owner: dom0 */
15 .perms = XS_PERM_READ,
17 struct xs_permissions perms_rw[] = {{
18 .id = 0, /* set owner: dom0 */
21 .perms = XS_PERM_READ | XS_PERM_WRITE,
23 const char *writable[] = { "device", "control", "error", NULL };
27 if (!xs_mkdir(xenstore, 0, path)) {
28 fprintf(stderr, "%s: xs_mkdir %s: failed\n", __FUNCTION__, path);
31 if (!xs_set_permissions(xenstore, 0, path, perms_ro, 2)) {
32 fprintf(stderr, "%s: xs_set_permissions failed\n", __FUNCTION__);
36 for (i = 0; writable[i]; i++) {
37 snprintf(subpath, sizeof(subpath), "%s/%s", path, writable[i]);
38 if (!xs_mkdir(xenstore, 0, subpath)) {
39 fprintf(stderr, "%s: xs_mkdir %s: failed\n", __FUNCTION__, subpath);
42 if (!xs_set_permissions(xenstore, 0, subpath, perms_rw, 2)) {
43 fprintf(stderr, "%s: xs_set_permissions failed\n", __FUNCTION__);
50 int xenstore_domain_init1(const char *kernel, const char *ramdisk,
53 char *dom, uuid_string[42], vm[256], path[256];
56 snprintf(uuid_string, sizeof(uuid_string), UUID_FMT,
57 qemu_uuid[0], qemu_uuid[1], qemu_uuid[2], qemu_uuid[3],
58 qemu_uuid[4], qemu_uuid[5], qemu_uuid[6], qemu_uuid[7],
59 qemu_uuid[8], qemu_uuid[9], qemu_uuid[10], qemu_uuid[11],
60 qemu_uuid[12], qemu_uuid[13], qemu_uuid[14], qemu_uuid[15]);
61 dom = xs_get_domain_path(xenstore, xen_domid);
62 snprintf(vm, sizeof(vm), "/vm/%s", uuid_string);
64 xenstore_domain_mkdir(dom);
66 xenstore_write_str(vm, "image/ostype", "linux");
68 xenstore_write_str(vm, "image/kernel", kernel);
70 xenstore_write_str(vm, "image/ramdisk", ramdisk);
72 xenstore_write_str(vm, "image/cmdline", cmdline);
75 xenstore_write_str(vm, "name", qemu_name ? qemu_name : "no-name");
76 xenstore_write_str(vm, "uuid", uuid_string);
77 xenstore_write_str(dom, "name", qemu_name ? qemu_name : "no-name");
78 xenstore_write_int(dom, "domid", xen_domid);
79 xenstore_write_str(dom, "vm", vm);
82 xenstore_write_int(dom, "memory/target", ram_size >> 10); // kB
83 xenstore_write_int(vm, "memory", ram_size >> 20); // MB
84 xenstore_write_int(vm, "maxmem", ram_size >> 20); // MB
87 for (i = 0; i < smp_cpus; i++) {
88 snprintf(path, sizeof(path), "cpu/%d/availability",i);
89 xenstore_write_str(dom, path, "online");
91 xenstore_write_int(vm, "vcpu_avail", smp_cpus);
92 xenstore_write_int(vm, "vcpus", smp_cpus);
95 xenstore_write_str(vm, "vncpassword", "" /* FIXME */);
101 int xenstore_domain_init2(int xenstore_port, int xenstore_mfn,
102 int console_port, int console_mfn)
106 dom = xs_get_domain_path(xenstore, xen_domid);
108 /* signal new domain */
109 xs_introduce_domain(xenstore,
115 xenstore_write_int(dom, "store/ring-ref", xenstore_mfn);
116 xenstore_write_int(dom, "store/port", xenstore_port);
119 xenstore_write_str(dom, "console/type", "ioemu");
120 xenstore_write_int(dom, "console/limit", 128 * 1024);
121 xenstore_write_int(dom, "console/ring-ref", console_mfn);
122 xenstore_write_int(dom, "console/port", console_port);
123 xen_config_dev_console(0);
129 /* ------------------------------------------------------------- */
131 static QEMUTimer *xen_poll;
133 /* check domain state once per second */
134 static void xen_domain_poll(void *opaque)
136 struct xc_dominfo info;
139 rc = xc_domain_getinfo(xen_xc, xen_domid, 1, &info);
140 if ((rc != 1) || (info.domid != xen_domid)) {
141 qemu_log("xen: domain %d is gone\n", xen_domid);
145 qemu_log("xen: domain %d is dying (%s%s)\n", xen_domid,
146 info.crashed ? "crashed" : "",
147 info.shutdown ? "shutdown" : "");
151 timer_mod(xen_poll, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + 1000);
155 qemu_system_shutdown_request();
158 static int xen_domain_watcher(void)
160 int qemu_running = 1;
165 qemu_log("%s: Huh? pipe error: %s\n", __FUNCTION__, strerror(errno));
169 return 0; /* not child */
171 /* close all file handles, except stdio/out/err,
172 * our watch pipe and the xen interface handle */
174 for (i = 3; i < n; i++) {
181 * Reopen xc interface, since the original is unsafe after fork
182 * and was closed above.
184 xen_xc = xc_interface_open(0, 0, 0);
186 /* ignore term signals */
187 signal(SIGINT, SIG_IGN);
188 signal(SIGTERM, SIG_IGN);
190 /* wait for qemu exiting */
191 while (qemu_running) {
192 rc = read(fd[0], &byte, 1);
197 qemu_log("%s: Huh? read error: %s\n", __FUNCTION__, strerror(errno));
201 /* EOF -> qemu exited */
205 qemu_log("%s: Huh? data on the watch pipe?\n", __FUNCTION__);
211 qemu_log("%s: destroy domain %d\n", __FUNCTION__, xen_domid);
212 xc_domain_destroy(xen_xc, xen_domid);
217 static void xen_domain_cleanup(void)
221 dom = xs_get_domain_path(xenstore, xen_domid);
223 xs_rm(xenstore, 0, dom);
226 xs_release_domain(xenstore, xen_domid);
229 int xen_domain_build_pv(const char *kernel, const char *ramdisk,
232 uint32_t ssidref = 0;
234 xen_domain_handle_t uuid;
235 unsigned int xenstore_port = 0, console_port = 0;
236 unsigned long xenstore_mfn = 0, console_mfn = 0;
239 memcpy(uuid, qemu_uuid, sizeof(uuid));
240 rc = xen_domain_create(xen_xc, ssidref, uuid, flags, &xen_domid);
242 fprintf(stderr, "xen: xc_domain_create() failed\n");
245 qemu_log("xen: created domain %d\n", xen_domid);
246 atexit(xen_domain_cleanup);
247 if (xen_domain_watcher() == -1) {
251 xenstore_domain_init1(kernel, ramdisk, cmdline);
253 rc = xc_domain_max_vcpus(xen_xc, xen_domid, smp_cpus);
255 fprintf(stderr, "xen: xc_domain_max_vcpus() failed\n");
260 rc = xc_domain_setcpuweight(xen_xc, xen_domid, 256);
262 fprintf(stderr, "xen: xc_domain_setcpuweight() failed\n");
267 rc = xc_domain_setmaxmem(xen_xc, xen_domid, ram_size >> 10);
269 fprintf(stderr, "xen: xc_domain_setmaxmem() failed\n");
273 xenstore_port = xc_evtchn_alloc_unbound(xen_xc, xen_domid, 0);
274 console_port = xc_evtchn_alloc_unbound(xen_xc, xen_domid, 0);
276 rc = xc_linux_build(xen_xc, xen_domid, ram_size >> 20,
277 kernel, ramdisk, cmdline,
279 xenstore_port, &xenstore_mfn,
280 console_port, &console_mfn);
282 fprintf(stderr, "xen: xc_linux_build() failed\n");
286 xenstore_domain_init2(xenstore_port, xenstore_mfn,
287 console_port, console_mfn);
289 qemu_log("xen: unpausing domain %d\n", xen_domid);
290 rc = xc_domain_unpause(xen_xc, xen_domid);
292 fprintf(stderr, "xen: xc_domain_unpause() failed\n");
296 xen_poll = timer_new_ms(QEMU_CLOCK_REALTIME, xen_domain_poll, NULL);
297 timer_mod(xen_poll, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + 1000);