[Xen-changelog] [xen-unstable] xl: allow parsing of both old and new cpuid syntax

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Andre Przywara <andre.przywara@xxxxxxx>
# Date 1285950160 -3600
# Node ID 10b7696a5395c02f6b58fc98aa4b0823f6a2d6b4
# Parent  a8c72f5a6bce9c99fece480f4c8e5d19121674e5
xl: allow parsing of both old and new cpuid syntax

Allow parsing of both versions of the cpuid syntax, the old xm used one
and the new one for xl. This works automatically, as the parser can tell
a Python list apart from a string before processing the line.

Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
committer: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
 tools/libxl/xl_cmdimpl.c |   87 +++++++++++++++++++++++++++++++++++++++++------
 1 files changed, 77 insertions(+), 10 deletions(-)

diff -r a8c72f5a6bce -r 10b7696a5395 tools/libxl/xl_cmdimpl.c
--- a/tools/libxl/xl_cmdimpl.c  Fri Oct 01 17:21:01 2010 +0100
+++ b/tools/libxl/xl_cmdimpl.c  Fri Oct 01 17:22:40 2010 +0100
@@ -647,7 +647,7 @@ static void parse_config_data(const char
     const char *buf;
     long l;
     XLU_Config *config;
-    XLU_ConfigList *vbds, *nics, *pcis, *cvfbs, *net2s;
+    XLU_ConfigList *vbds, *nics, *pcis, *cvfbs, *net2s, *cpuids;
     int pci_power_mgmt = 0;
     int pci_msitranslate = 1;
     int e;
@@ -1085,15 +1085,82 @@ skip_vfb:
         }
     }
 
-    if (!xlu_cfg_get_string(config, "cpuid", &buf)) {
-        char *buf2, *p, *strtok_ptr;
-
-        buf2 = strdup(buf);
-        p = strtok_r(buf2, ",", &strtok_ptr);
-        for (p = strtok_r(NULL, ",", &strtok_ptr); p != NULL;
-             p = strtok_r(NULL, ",", &strtok_ptr))
-            libxl_cpuid_parse_config(&b_info->cpuid, p);
-        free(buf2);
+    switch (xlu_cfg_get_list(config, "cpuid", &cpuids, 0, 1)) {
+    case 0:
+        {
+            int i;
+            char *errstr;
+
+            for (i = 0; (buf = xlu_cfg_get_listitem(cpuids, i)) != NULL; i++) {
+                e = libxl_cpuid_parse_config_xend(&b_info->cpuid, buf);
+                switch (e) {
+                case 0: continue;
+                case 1:
+                    errstr = "illegal leaf number";
+                    break;
+                case 2:
+                    errstr = "illegal subleaf number";
+                    break;
+                case 3:
+                    errstr = "missing colon";
+                    break;
+                case 4:
+                    errstr = "invalid register name (must be e[abcd]x)";
+                    break;
+                case 5:
+                    errstr = "policy string must be exactly 32 characters 
long";
+                    break;
+                default:
+                    errstr = "unknown error";
+                    break;
+                }
+                fprintf(stderr, "while parsing CPUID line: \"%s\":\n", buf);
+                fprintf(stderr, "  error #%i: %s\n", e, errstr);
+            }
+        }
+        break;
+    case EINVAL:    /* config option is not a list, parse as a string */
+        if (!xlu_cfg_get_string(config, "cpuid", &buf)) {
+            char *buf2, *p, *errstr, *strtok_ptr = NULL;
+
+            buf2 = strdup(buf);
+            p = strtok_r(buf2, ",", &strtok_ptr);
+            if (p == NULL) {
+                free(buf2);
+                break;
+            }
+            if (strcmp(p, "host")) {
+                fprintf(stderr, "while parsing CPUID string: \"%s\":\n", buf);
+                fprintf(stderr, "  error: first word must be \"host\"\n");
+                free(buf2);
+                break;
+            }
+            for (p = strtok_r(NULL, ",", &strtok_ptr); p != NULL;
+                 p = strtok_r(NULL, ",", &strtok_ptr)) {
+                e = libxl_cpuid_parse_config(&b_info->cpuid, p);
+                switch (e) {
+                case 0: continue;
+                case 1:
+                    errstr = "missing \"=\" in key=value";
+                    break;
+                case 2:
+                    errstr = "unknown CPUID flag name";
+                    break;
+                case 3:
+                    errstr = "illegal CPUID value (must be: [0|1|x|k|s])";
+                    break;
+                default:
+                    errstr = "unknown error";
+                    break;
+                }
+                fprintf(stderr, "while parsing CPUID flag: \"%s\":\n", p);
+                fprintf(stderr, "  error #%i: %s\n", e, errstr);
+            }
+            free(buf2);
+        }
+        break;
+    default:
+        break;
     }
 
     if (c_info->hvm == 1) {

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