2 #include "xen_backend.h"
3 #include "xen_domainbuild.h"
5 #include "qemu-timer.h"
10 static int xenstore_domain_mkdir(char *path)
12 struct xs_permissions perms_ro[] = {{
13 .id = 0, /* set owner: dom0 */
16 .perms = XS_PERM_READ,
18 struct xs_permissions perms_rw[] = {{
19 .id = 0, /* set owner: dom0 */
22 .perms = XS_PERM_READ | XS_PERM_WRITE,
24 const char *writable[] = { "device", "control", "error", NULL };
28 if (!xs_mkdir(xenstore, 0, path)) {
29 fprintf(stderr, "%s: xs_mkdir %s: failed\n", __FUNCTION__, path);
32 if (!xs_set_permissions(xenstore, 0, path, perms_ro, 2)) {
33 fprintf(stderr, "%s: xs_set_permissions failed\n", __FUNCTION__);
37 for (i = 0; writable[i]; i++) {
38 snprintf(subpath, sizeof(subpath), "%s/%s", path, writable[i]);
39 if (!xs_mkdir(xenstore, 0, subpath)) {
40 fprintf(stderr, "%s: xs_mkdir %s: failed\n", __FUNCTION__, subpath);
43 if (!xs_set_permissions(xenstore, 0, subpath, perms_rw, 2)) {
44 fprintf(stderr, "%s: xs_set_permissions failed\n", __FUNCTION__);
51 int xenstore_domain_init1(const char *kernel, const char *ramdisk,
54 char *dom, uuid_string[42], vm[256], path[256];
57 snprintf(uuid_string, sizeof(uuid_string), UUID_FMT,
58 qemu_uuid[0], qemu_uuid[1], qemu_uuid[2], qemu_uuid[3],
59 qemu_uuid[4], qemu_uuid[5], qemu_uuid[6], qemu_uuid[7],
60 qemu_uuid[8], qemu_uuid[9], qemu_uuid[10], qemu_uuid[11],
61 qemu_uuid[12], qemu_uuid[13], qemu_uuid[14], qemu_uuid[15]);
62 dom = xs_get_domain_path(xenstore, xen_domid);
63 snprintf(vm, sizeof(vm), "/vm/%s", uuid_string);
65 xenstore_domain_mkdir(dom);
67 xenstore_write_str(vm, "image/ostype", "linux");
69 xenstore_write_str(vm, "image/kernel", kernel);
71 xenstore_write_str(vm, "image/ramdisk", ramdisk);
73 xenstore_write_str(vm, "image/cmdline", cmdline);
76 xenstore_write_str(vm, "name", qemu_name ? qemu_name : "no-name");
77 xenstore_write_str(vm, "uuid", uuid_string);
78 xenstore_write_str(dom, "name", qemu_name ? qemu_name : "no-name");
79 xenstore_write_int(dom, "domid", xen_domid);
80 xenstore_write_str(dom, "vm", vm);
83 xenstore_write_int(dom, "memory/target", ram_size >> 10); // kB
84 xenstore_write_int(vm, "memory", ram_size >> 20); // MB
85 xenstore_write_int(vm, "maxmem", ram_size >> 20); // MB
88 for (i = 0; i < smp_cpus; i++) {
89 snprintf(path, sizeof(path), "cpu/%d/availability",i);
90 xenstore_write_str(dom, path, "online");
92 xenstore_write_int(vm, "vcpu_avail", smp_cpus);
93 xenstore_write_int(vm, "vcpus", smp_cpus);
96 xenstore_write_str(vm, "vncpassword", "" /* FIXME */);
102 int xenstore_domain_init2(int xenstore_port, int xenstore_mfn,
103 int console_port, int console_mfn)
107 dom = xs_get_domain_path(xenstore, xen_domid);
109 /* signal new domain */
110 xs_introduce_domain(xenstore,
116 xenstore_write_int(dom, "store/ring-ref", xenstore_mfn);
117 xenstore_write_int(dom, "store/port", xenstore_port);
120 xenstore_write_str(dom, "console/type", "ioemu");
121 xenstore_write_int(dom, "console/limit", 128 * 1024);
122 xenstore_write_int(dom, "console/ring-ref", console_mfn);
123 xenstore_write_int(dom, "console/port", console_port);
124 xen_config_dev_console(0);
130 /* ------------------------------------------------------------- */
132 static QEMUTimer *xen_poll;
134 /* check domain state once per second */
135 static void xen_domain_poll(void *opaque)
137 struct xc_dominfo info;
140 rc = xc_domain_getinfo(xen_xc, xen_domid, 1, &info);
141 if ((rc != 1) || (info.domid != xen_domid)) {
142 qemu_log("xen: domain %d is gone\n", xen_domid);
146 qemu_log("xen: domain %d is dying (%s%s)\n", xen_domid,
147 info.crashed ? "crashed" : "",
148 info.shutdown ? "shutdown" : "");
152 qemu_mod_timer(xen_poll, qemu_get_clock_ms(rt_clock) + 1000);
156 qemu_system_shutdown_request();
160 static int xen_domain_watcher(void)
162 int qemu_running = 1;
167 qemu_log("%s: Huh? pipe error: %s\n", __FUNCTION__, strerror(errno));
171 return 0; /* not child */
173 /* close all file handles, except stdio/out/err,
174 * our watch pipe and the xen interface handle */
176 for (i = 3; i < n; i++) {
184 /* ignore term signals */
185 signal(SIGINT, SIG_IGN);
186 signal(SIGTERM, SIG_IGN);
188 /* wait for qemu exiting */
189 while (qemu_running) {
190 rc = read(fd[0], &byte, 1);
195 qemu_log("%s: Huh? read error: %s\n", __FUNCTION__, strerror(errno));
199 /* EOF -> qemu exited */
203 qemu_log("%s: Huh? data on the watch pipe?\n", __FUNCTION__);
209 qemu_log("%s: destroy domain %d\n", __FUNCTION__, xen_domid);
210 xc_domain_destroy(xen_xc, xen_domid);
215 static void xen_domain_cleanup(void)
219 dom = xs_get_domain_path(xenstore, xen_domid);
221 xs_rm(xenstore, 0, dom);
224 xs_release_domain(xenstore, xen_domid);
227 int xen_domain_build_pv(const char *kernel, const char *ramdisk,
230 uint32_t ssidref = 0;
232 xen_domain_handle_t uuid;
233 unsigned int xenstore_port = 0, console_port = 0;
234 unsigned long xenstore_mfn = 0, console_mfn = 0;
237 memcpy(uuid, qemu_uuid, sizeof(uuid));
238 rc = xc_domain_create(xen_xc, ssidref, uuid, flags, &xen_domid);
240 fprintf(stderr, "xen: xc_domain_create() failed\n");
243 qemu_log("xen: created domain %d\n", xen_domid);
244 atexit(xen_domain_cleanup);
245 if (xen_domain_watcher() == -1) {
249 xenstore_domain_init1(kernel, ramdisk, cmdline);
251 rc = xc_domain_max_vcpus(xen_xc, xen_domid, smp_cpus);
253 fprintf(stderr, "xen: xc_domain_max_vcpus() failed\n");
258 rc = xc_domain_setcpuweight(xen_xc, xen_domid, 256);
260 fprintf(stderr, "xen: xc_domain_setcpuweight() failed\n");
265 rc = xc_domain_setmaxmem(xen_xc, xen_domid, ram_size >> 10);
267 fprintf(stderr, "xen: xc_domain_setmaxmem() failed\n");
271 xenstore_port = xc_evtchn_alloc_unbound(xen_xc, xen_domid, 0);
272 console_port = xc_evtchn_alloc_unbound(xen_xc, xen_domid, 0);
274 rc = xc_linux_build(xen_xc, xen_domid, ram_size >> 20,
275 kernel, ramdisk, cmdline,
277 xenstore_port, &xenstore_mfn,
278 console_port, &console_mfn);
280 fprintf(stderr, "xen: xc_linux_build() failed\n");
284 xenstore_domain_init2(xenstore_port, xenstore_mfn,
285 console_port, console_mfn);
287 qemu_log("xen: unpausing domain %d\n", xen_domid);
288 rc = xc_domain_unpause(xen_xc, xen_domid);
290 fprintf(stderr, "xen: xc_domain_unpause() failed\n");
294 xen_poll = qemu_new_timer_ms(rt_clock, xen_domain_poll, NULL);
295 qemu_mod_timer(xen_poll, qemu_get_clock_ms(rt_clock) + 1000);