[Xen-changelog] [xen-unstable] xl: avoid creating domains with duplicate names

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
# Date 1296057909 0
# Node ID 310cc33bfc810824c9f818ca7f320e6e88f26705
# Parent  67d5b80049473d4b00ad8c198b9d11e6488b1c0e
xl: avoid creating domains with duplicate names

Do not create the domain if another domain with the same name is already
running.

This is another error-checking function at rather too high a level:
this should be moved into libxl_domain_rename in 4.2.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Signed-off-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Committed-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
 tools/libxl/xl_cmdimpl.c |   10 ++++++++++
 1 files changed, 10 insertions(+)

diff -r 67d5b8004947 -r 310cc33bfc81 tools/libxl/xl_cmdimpl.c
--- a/tools/libxl/xl_cmdimpl.c  Wed Jan 26 11:58:45 2011 +0000
+++ b/tools/libxl/xl_cmdimpl.c  Wed Jan 26 16:05:09 2011 +0000
@@ -583,6 +583,7 @@ static void parse_config_data(const char
     XLU_ConfigList *vbds, *nics, *pcis, *cvfbs, *net2s, *cpuids;
     int pci_power_mgmt = 0;
     int pci_msitranslate = 1;
+    uint32_t domid_e;
     int e;
 
     libxl_domain_create_info *c_info = &d_config->c_info;
@@ -612,6 +613,15 @@ static void parse_config_data(const char
 
     if (xlu_cfg_replace_string (config, "name", &c_info->name))
         c_info->name = strdup("test");
+    e = libxl_name_to_domid(&ctx, c_info->name, &domid_e);
+    if (!e) {
+        fprintf(stderr, "A domain with name \"%s\" already exists.\n", 
c_info->name);
+        exit(1);
+    }
+    if (e != ERROR_INVAL) {
+        fprintf(stderr, "Unexpected error checking for existing domain"
+                " (error=%d)", e);
+    }
 
     if (!xlu_cfg_get_string (config, "uuid", &buf) ) {
         if ( libxl_uuid_from_string(&c_info->uuid, buf) ) {

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