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

[Gihan Munasinghe <GMunasinghe@flexiant.com>]

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Stefano Stabellini wrote:
> On Sat, 8 May 2010, Gihan Munasinghe wrote:
>   
>> 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
>>
>>     
>
> Thanks for the patch!
> It is mostly correct, however libxenlight changed quite a bit since xen
> 4.0 so could you please port your changes to xen-unstable?
>
>
>   
The Patch is ported to xen-unstable see attached
>>  
>> +start:
>> +    domid = 0;
>> +
>>      ret = libxl_domain_make(&ctx, &info1, &domid);
>>      if (ret) {
>>          fprintf(stderr, "cannot make domain: %d\n", ret);
>>     
>
> this is probably not needed anymore
>
>   
Yes this fix is not needed anymore
>
>>                              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");
>>     
>
> since we don't free the ctx anymore here, it might be unnecessary.
> The other changes look OK but we have a command table now, so they need
> to be adapted.
>
>   
The sleep is still needed, if not libxl_* calls fails sometimes. I'll do 
more debugging with in the calls it self and see, but for now the 
sleep() seems to do the trick.

Thanks

Gihan 



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diff -Naur libxl/libxl.c libxl-patch/libxl.c
--- libxl/libxl.c	2010-05-11 09:37:50.000000000 +0100
+++ libxl-patch/libxl.c	2010-05-12 16:24:42.000000000 +0100
@@ -538,12 +538,12 @@
     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 libxl/xl_cmdimpl.c libxl-patch/xl_cmdimpl.c
--- libxl/xl_cmdimpl.c	2010-05-11 09:37:50.000000000 +0100
+++ libxl-patch/xl_cmdimpl.c	2010-05-12 16:46:12.000000000 +0100
@@ -1129,6 +1129,7 @@
                             free(w1);
                             free(w2);
                             LOG("Done. Rebooting now");
+                            sleep(2);/*Fix Me: If this sleep is not there the domain creation failes sometimes*/
                             goto start;
                         }
                         LOG("Done. Exiting now");
@@ -1226,6 +1227,12 @@
     } 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");
@@ -1591,6 +1598,23 @@
     if (rc) { fprintf(stderr,"destroy failed (rc=%d)\n.",rc); exit(-1); }
 }
 
+void shutdown_domain(char *p)
+{
+    int rc;
+    find_domain(p);
+    rc=libxl_domain_shutdown(&ctx, domid, 0);
+    if (rc) { fprintf(stderr,"shutdown failed (rc=%d)\n.",rc);exit(-1); }
+}
+
+void reboot_domain(char *p)
+{
+    int rc;
+    find_domain(p);
+    rc=libxl_domain_shutdown(&ctx, domid, 1);
+    if (rc) { fprintf(stderr,"reboot failed (rc=%d)\n.",rc);exit(-1); }
+}
+
+
 void list_domains(int verbose)
 {
     struct libxl_dominfo *info;
@@ -2340,6 +2364,59 @@
     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, verbose = 0;
diff -Naur libxl/xl_cmdimpl.h libxl-patch/xl_cmdimpl.h
--- libxl/xl_cmdimpl.h	2010-05-11 09:37:50.000000000 +0100
+++ libxl-patch/xl_cmdimpl.h	2010-05-11 12:51:14.000000000 +0100
@@ -27,6 +27,8 @@
 int main_pause(int argc, char **argv);
 int main_unpause(int argc, char **argv);
 int main_destroy(int argc, char **argv);
+int main_shutdown(int argc, char **argv);
+int main_reboot(int argc, char **argv);
 int main_list(int argc, char **argv);
 int main_list_vm(int argc, char **argv);
 int main_create(int argc, char **argv);
diff -Naur libxl/xl_cmdtable.c libxl-patch/xl_cmdtable.c
--- libxl/xl_cmdtable.c	2010-05-11 09:37:50.000000000 +0100
+++ libxl-patch/xl_cmdtable.c	2010-05-11 13:28:31.000000000 +0100
@@ -18,6 +18,8 @@
     { "create", &main_create, "create a domain from config file <filename>" },
     { "list", &main_list, "list information about all domains" },
     { "destroy", &main_destroy, "terminate a domain immediately" },
+    { "shutdown", &main_shutdown, "issue a shutdown signal to a domain" },
+    { "reboot", &main_reboot, "issue a reboot signal to a domain " },
     { "pci-attach", &main_pciattach, "insert a new pass-through pci device" },
     { "pci-detach", &main_pcidetach, "remove a domain's pass-through pci device" },
     { "pci-list", &main_pcilist, "list pass-through pci devices for a domain" },

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