Re: [PATCH] Change the virtual NICs limit for the ESX driver

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On 7/7/20 4:04 PM, Bastien Orivel wrote:
Since the ESX virtual hardware version 4.0, virtual machines support up
to 10 virtual NICs instead of 4 previously. This changes the limit
accordingly based on the provided `virtualHW.version`.

Signed-off-by: Bastien Orivel <bastien.orivel@xxxxxxxxxxx>
---
  src/vmx/vmx.c | 20 ++++++++++++++------
  src/vmx/vmx.h |  2 +-
  2 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/src/vmx/vmx.c b/src/vmx/vmx.c
index 67bbe27fde..afe6fe0a1a 100644
--- a/src/vmx/vmx.c
+++ b/src/vmx/vmx.c
@@ -290,7 +290,7 @@ def->fss[0]...                    <=>   sharedFolder0.present = "true"
  ################################################################################
  ## nets ########################################################################
- ethernet[0..3] -> <controller>
+                                        ethernet[0..9] -> <controller>
ethernet0.present = "true" # defaults to "false"
                                          ethernet0.startConnected = "true"       # defaults to "true"
@@ -3376,7 +3376,7 @@ virVMXFormatConfig(virVMXContext *ctx, virDomainXMLOptionPtr xmlopt, virDomainDe
/* def:nets */
      for (i = 0; i < def->nnets; ++i) {
-        if (virVMXFormatEthernet(def->nets[i], i, &buffer) < 0)
+        if (virVMXFormatEthernet(def->nets[i], i, &buffer, virtualHW_version) < 0)
              goto cleanup;
      }
@@ -3732,15 +3732,23 @@ virVMXFormatFileSystem(virDomainFSDefPtr def, int number, virBufferPtr buffer) int
  virVMXFormatEthernet(virDomainNetDefPtr def, int controller,
-                     virBufferPtr buffer)
+                     virBufferPtr buffer, int virtualHW_version)
  {
      char mac_string[VIR_MAC_STRING_BUFLEN];
      unsigned int prefix, suffix;
- if (controller < 0 || controller > 3) {
+    /*
+     * Machines older than virtualHW.version = 7 (ESXi 4.0) only support up to 4
+     * virtual NICs. New machines support up to 10.
+     */
+    int controller_limit = 4;
+    if (virtualHW_version >= 7)
+        controller_limit = 10;
+
+    if (controller < 0 || controller > controller_limit) {

This allows 4 nics for the old ESX version (if controller = 4 then this would be reported, but with your patch it isn't anymore), and 11 nics for the new EXS (if controller = 10, then this again is not caught properly). We need to decrease those 4 and 10 and ..

          virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("Ethernet controller index %d out of [0..3] range"),
-                       controller);
+                       _("Ethernet controller index %d out of [0..%d] range"),
+                       controller, controller_limit - 1);

.. drop this -1.

No need to send v2, I can fix it just before pushing, if you agree with suggested change.

Michal




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