[PATCH] new commands "xl reboot" & "xl shutdown"

[Gihan Munasinghe <GMunasinghe@flexiant.com>]

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Guys

I patched xl to have "reboot" and "shutdown" commands.
I tested this with hvm domains with and and without pv drivers seems to 
work, of course the os level reboot and shutdown will only happen if 
there are pv drivers with the dom U.

Also the libxl_domain_shutdown was not working for hvm guests without pv 
drivers, I did a small patch to that as well. (same way xend shutdown 
works used || instead of a && ). I would appreciate if someone can test 
this more with hvm and pv domains.

Let me know what  you think


-- 
Gihan Munasinghe
R&D Team Leader
Flexiant Ltd.
www.flexiant.com


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diff -Naur vanila/xen-4.0.0/tools/libxl/libxl.c xen4patch/xen-4.0.0/tools/libxl/libxl.c
--- vanila/xen-4.0.0/tools/libxl/libxl.c	2010-04-07 17:12:04.000000000 +0100
+++ xen4patch/xen-4.0.0/tools/libxl/libxl.c	2010-05-07 23:14:26.000000000 +0100
@@ -400,12 +400,12 @@
     shutdown_path = libxl_sprintf(ctx, "%s/control/shutdown", dom_path);
 
     xs_write(ctx->xsh, XBT_NULL, shutdown_path, req_table[req], strlen(req_table[req]));
-    if (/* hvm */ 0) {
+    if (/* hvm */ 1) {
         unsigned long acpi_s_state = 0;
         unsigned long pvdriver = 0;
         xc_get_hvm_param(ctx->xch, domid, HVM_PARAM_ACPI_S_STATE, &acpi_s_state);
         xc_get_hvm_param(ctx->xch, domid, HVM_PARAM_CALLBACK_IRQ, &pvdriver);
-        if (!pvdriver && acpi_s_state != 0)
+        if (!pvdriver || acpi_s_state != 0)
             xc_domain_shutdown(ctx->xch, domid, req);
     }
     return 0;
diff -Naur vanila/xen-4.0.0/tools/libxl/xl.c xen4patch/xen-4.0.0/tools/libxl/xl.c
--- vanila/xen-4.0.0/tools/libxl/xl.c	2010-04-07 17:12:04.000000000 +0100
+++ xen4patch/xen-4.0.0/tools/libxl/xl.c	2010-05-08 00:19:51.000000000 +0100
@@ -702,9 +702,6 @@
     if (debug)
         printf_info(&info1, &info2, disks, num_disks, vifs, num_vifs, pcidevs, num_pcidevs, vfbs, num_vfbs, vkbs, num_vkbs, &dm_info);
 
-start:
-    domid = 0;
-
     if (libxl_ctx_init(&ctx, LIBXL_VERSION)) {
         fprintf(stderr, "cannot init xl context\n");
         return;
@@ -712,6 +709,9 @@
 
     libxl_ctx_set_log(&ctx, log_callback, NULL);
 
+start:
+    domid = 0;
+
     ret = libxl_domain_make(&ctx, &info1, &domid);
     if (ret) {
         fprintf(stderr, "cannot make domain: %d\n", ret);
@@ -830,8 +830,9 @@
                             libxl_free_waiter(w2);
                             free(w1);
                             free(w2);
-                            libxl_ctx_free(&ctx);
                             LOG("Done. Rebooting now");
+                            sleep(2);/*Fix Me: The sleep is put here to slowdown the recreation of the domain 
+                                       If this sleep it not there, hvm_domain creation failes sometimes*/
                             goto start;
                         }
                         LOG("Done. Exiting now");
@@ -864,6 +865,8 @@
         printf(" create                        create a domain from config file <filename>\n\n");
         printf(" list                          list information about all domains\n\n");
         printf(" destroy                       terminate a domain immediately\n\n");
+        printf(" shutdown                      issue a shutdown signal to a domain\n\n");
+        printf(" reboot                        issue a reboot signal to a domain\n\n");
         printf(" pci-attach                    insert a new pass-through pci device\n\n");
         printf(" pci-detach                    remove a domain's pass-through pci device\n\n");
         printf(" pci-list                      list pass-through pci devices for a domain\n\n");
@@ -917,6 +920,12 @@
     } else if(!strcmp(command, "destroy")) {
         printf("Usage: xl destroy <Domain>\n\n");
         printf("Terminate a domain immediately.\n\n");
+    } else if(!strcmp(command, "shutdown")) {
+        printf("Usage: xl shutdown <Domain>\n\n");
+        printf("Issue a shutdown signal to a domain.\n\n");
+    } else if(!strcmp(command, "reboot")) {
+        printf("Usage: xl reboot <Domain>\n\n");
+        printf("Issue a reboot signal to a domain.\n\n");
     } else if (!strcmp(command, "console")) {
         printf("Usage: xl console <Domain>\n\n");
         printf("Attach to domain's console.\n\n");
@@ -1352,6 +1361,43 @@
     libxl_domain_destroy(&ctx, domid, 0);
 }
 
+void shutdown_domain(char *p)
+{
+    struct libxl_ctx ctx;
+    uint32_t domid;
+
+    if (libxl_ctx_init(&ctx, LIBXL_VERSION)) {
+        fprintf(stderr, "cannot init xl context\n");
+        return;
+    }
+    libxl_ctx_set_log(&ctx, log_callback, NULL);
+
+    if (domain_qualifier_to_domid(&ctx, p, &domid) < 0) {
+        fprintf(stderr, "%s is an invalid domain identifier\n", p);
+        exit(2);
+    }
+    libxl_domain_shutdown(&ctx, domid, 0);
+}
+
+void reboot_domain(char *p)
+{
+    struct libxl_ctx ctx;
+    uint32_t domid;
+
+    if (libxl_ctx_init(&ctx, LIBXL_VERSION)) {
+        fprintf(stderr, "cannot init xl context\n");
+        return;
+    }
+    libxl_ctx_set_log(&ctx, log_callback, NULL);
+
+    if (domain_qualifier_to_domid(&ctx, p, &domid) < 0) {
+        fprintf(stderr, "%s is an invalid domain identifier\n", p);
+        exit(2);
+    }
+    libxl_domain_shutdown(&ctx, domid, 1);
+}
+
+
 void list_domains(void)
 {
     struct libxl_ctx ctx;
@@ -1596,6 +1642,58 @@
     exit(0);
 }
 
+int main_shutdown(int argc, char **argv)
+{
+    int opt;
+    char *p;
+
+    while ((opt = getopt(argc, argv, "h")) != -1) {
+        switch (opt) {
+        case 'h':
+            help("shutdown");
+            exit(0);
+        default:
+            fprintf(stderr, "option not supported\n");
+            break;
+        }
+    }
+    if (optind >= argc) {
+        help("shutdown");
+        exit(2);
+    }
+
+    p = argv[optind];
+
+    shutdown_domain(p);
+    exit(0);
+}
+
+int main_reboot(int argc, char **argv)
+{
+    int opt;
+    char *p;
+
+    while ((opt = getopt(argc, argv, "h")) != -1) {
+        switch (opt) {
+        case 'h':
+            help("reboot");
+            exit(0);
+        default:
+            fprintf(stderr, "option not supported\n");
+            break;
+        }
+    }
+    if (optind >= argc) {
+        help("reboot");
+        exit(2);
+    }
+
+    p = argv[optind];
+
+    reboot_domain(p);
+    exit(0);
+}
+
 int main_list(int argc, char **argv)
 {
     int opt;
@@ -1738,6 +1836,10 @@
         main_list_vm(argc - 1, argv + 1);
     } else if (!strcmp(argv[1], "destroy")) {
         main_destroy(argc - 1, argv + 1);
+    } else if (!strcmp(argv[1], "shutdown")) {
+        main_shutdown(argc - 1, argv + 1);
+    } else if (!strcmp(argv[1], "reboot")) {
+        main_reboot(argc - 1, argv + 1);
     } else if (!strcmp(argv[1], "pci-attach")) {
         main_pciattach(argc - 1, argv + 1);
     } else if (!strcmp(argv[1], "pci-detach")) {

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