Re: [PATCH v3 1/6] conf: Add new domain XML element 'iothreadids'

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On 04/21/2015 10:08 AM, Peter Krempa wrote:
> On Tue, Apr 14, 2015 at 21:18:21 -0400, John Ferlan wrote:
>> Adding a new XML element 'iothreadids' in order to allow defining
>> specific IOThread ID's rather than relying on the algorithm to assign
>> IOThread ID's starting at 1 and incrementing to iothreads count.
>>
>> This will allow future patches to be able to add new IOThreads by
>> a specific iothread_id and of course delete any exisiting IOThread.
>>
>> Each iothreadids element will have 'n' <iothread> children elements
>> which will have attribute "id".  The "id" will allow for definition
>> of any "valid" (eg > 0) iothread_id value.
>>
>> On input, if any <iothreadids> <iothread>'s are provided, they will
>> be marked so that we only print out what we read in.
>>
>> On input, if no <iothreadids> are provided, the PostParse code will
>> self generate a list of ID's starting at 1 and going to the number
>> of iothreads defined for the domain (just like the current algorithm
>> numbering scheme).  A future patch will rework the existing algorithm
>> to make use of the iothreadids list.
>>
>> On output, only print out the <iothreadids> if they were read in.
>>
>> Signed-off-by: John Ferlan <jferlan@xxxxxxxxxx>
>> ---
>>  docs/formatdomain.html.in     |  30 +++++++
>>  docs/schemas/domaincommon.rng |  12 +++
>>  src/conf/domain_conf.c        | 190 +++++++++++++++++++++++++++++++++++++++++-
>>  src/conf/domain_conf.h        |  15 ++++
>>  src/libvirt_private.syms      |   3 +
>>  5 files changed, 248 insertions(+), 2 deletions(-)
>>
>> diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
>> index e921749..518f7c5 100644
>> --- a/docs/formatdomain.html.in
>> +++ b/docs/formatdomain.html.in
>> @@ -521,6 +521,18 @@
>>    ...
>>  &lt;/domain&gt;
>>  </pre>
>> +<pre>
>> +&lt;domain&gt;
>> +  ...
>> +  &lt;iothreadids&gt;
>> +    &lt;iothread id="2"/&gt;
>> +    &lt;iothread id="4"/&gt;
>> +    &lt;iothread id="6"/&gt;
>> +    &lt;iothread id="8"/&gt;
>> +  &lt;/iothreadids&gt;
>> +  ...
>> +&lt;/domain&gt;
>> +</pre>
>>  
>>      <dl>
>>        <dt><code>iothreads</code></dt>
>> @@ -530,7 +542,25 @@
>>          virtio-blk-pci and virtio-blk-ccw target storage devices. There
>>          should be only 1 or 2 IOThreads per host CPU. There may be more
>>          than one supported device assigned to each IOThread.
>> +        <span class="since">Since 1.2.8</span>
>>        </dd>
>> +      <dt><code>iothreadids</code></dt>
>> +      <dd>
>> +        The optional <code>iothreadids</code> element provides the capability
>> +        to specifically define the IOThread ID's for the domain.  By default,
>> +        IOThread ID's are sequentially numbered starting from 1 through the
>> +        number of <code>iothreads</code> defined for the domain. The
>> +        <code>id</code> attribute is used to define the IOThread ID. The
>> +        <code>id</code> attribute must be a positive integer greater than 0.
>> +        If there are less <code>iothreadids</code> defined than
>> +        <code>iothreads</code> defined for the domain, then libvirt will
>> +        sequentially fill <code>iothreadids</code> starting at 1 avoiding
>> +        any predefined <code>id</code>. If there are more
>> +        <code>iothreadids</code> defined than <code>iothreads</code>
>> +        defined for the domain, then the <code>iothreads</code> value
>> +        will be adjusted accordingly.
>> +        <span class="since">Since 1.2.15</span>
>> +       </dd>
>>      </dl>
>>  
>>      <h3><a name="elementsCPUTuning">CPU Tuning</a></h3>
>> diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
>> index 03fd541..4bd32bd 100644
>> --- a/docs/schemas/domaincommon.rng
>> +++ b/docs/schemas/domaincommon.rng
>> @@ -675,6 +675,18 @@
>>        </optional>
>>  
>>        <optional>
>> +        <element name="iothreadids">
>> +          <zeroOrMore>
>> +            <element name="iothread">
>> +              <attribute name="id">
>> +                <ref name="unsignedInt"/>
>> +              </attribute>
>> +            </element>
>> +          </zeroOrMore>
>> +        </element>
>> +      </optional>
>> +
>> +      <optional>
>>          <ref name="blkiotune"/>
>>        </optional>
>>  
>> diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
>> index 4d7e3c9..e86b7e2 100644
>> --- a/src/conf/domain_conf.c
>> +++ b/src/conf/domain_conf.c
>> @@ -2113,6 +2113,23 @@ virDomainPinDefCopy(virDomainPinDefPtr *src, int npin)
>>      return NULL;
>>  }
>>  
>> +
>> +static void
>> +virDomainIOThreadIDDefArrayFree(virDomainIOThreadIDDefPtr *def,
>> +                                int nids)
>> +{
>> +    size_t i;
>> +
>> +    if (!def)
>> +        return;
>> +
>> +    for (i = 0; i < nids; i++)
>> +        VIR_FREE(def[i]);
>> +
>> +    VIR_FREE(def);
>> +}
>> +
>> +
>>  void
>>  virDomainPinDefFree(virDomainPinDefPtr def)
>>  {
>> @@ -2310,6 +2327,8 @@ void virDomainDefFree(virDomainDefPtr def)
>>  
>>      virCPUDefFree(def->cpu);
>>  
>> +    virDomainIOThreadIDDefArrayFree(def->iothreadids, def->niothreadids);
>> +
>>      virDomainPinDefArrayFree(def->cputune.vcpupin, def->cputune.nvcpupin);
>>  
>>      virDomainPinDefFree(def->cputune.emulatorpin);
>> @@ -3304,6 +3323,18 @@ virDomainDefPostParseInternal(virDomainDefPtr def,
>>          return -1;
>>      }
>>  
>> +    /* Fully populate the IOThread ID list */
>> +    if (def->iothreads && def->iothreads != def->niothreadids) {
>> +        unsigned int iothread_id = 1;
>> +        while (def->niothreadids != def->iothreads) {
>> +            if (!virDomainIOThreadIDFind(def, iothread_id)) {
>> +                if (virDomainIOThreadIDAdd(def, iothread_id) < 0)
> 
> This code is _adding_ fields for every iothread that was not specified
> in <iothreadids> but is implied by <iothreads>, but before that you've
> allocated all the structures in [1].
> 

Hmm... correct - of course the allocation in [1] was suggested by
previous code review.

> 
>> +                    return -1;
>> +            }
>> +            iothread_id++;
>> +        }
>> +    }
>> +
>>      if (virDomainDefGetMemoryInitial(def) == 0) {
>>          virReportError(VIR_ERR_XML_ERROR, "%s",
>>                         _("Memory size must be specified via <memory> or in the "
>> @@ -13173,6 +13204,56 @@ virDomainIdmapDefParseXML(xmlXPathContextPtr ctxt,
>>      return idmap;
>>  }
>>  
>> +/* Parse the XML definition for an IOThread ID
>> + *
>> + * Format is :
>> + *
>> + *     <iothreads>4</iothreads>
>> + *     <iothreadids>
>> + *       <iothread id='1'/>
>> + *       <iothread id='3'/>
>> + *       <iothread id='5'/>
>> + *       <iothread id='7'/>
>> + *     </iothreadids>
>> + */
>> +static virDomainIOThreadIDDefPtr
>> +virDomainIOThreadIDDefParseXML(xmlNodePtr node,
>> +                               xmlXPathContextPtr ctxt)
>> +{
>> +    virDomainIOThreadIDDefPtr iothrid;
>> +    xmlNodePtr oldnode = ctxt->node;
>> +    char *tmp = NULL;
>> +
>> +    if (VIR_ALLOC(iothrid) < 0)
>> +        return NULL;
>> +
>> +    ctxt->node = node;
>> +
>> +    if (!(tmp = virXPathString("string(./@id)", ctxt))) {
>> +        virReportError(VIR_ERR_XML_ERROR, "%s",
>> +                       _("Missing 'id' attribute in <iothread> element"));
>> +        goto error;
>> +    }
>> +    if (virStrToLong_uip(tmp, NULL, 10, &iothrid->iothread_id) < 0 ||
>> +        iothrid->iothread_id == 0) {
>> +        virReportError(VIR_ERR_XML_ERROR,
>> +                        _("invalid iothread 'id' value '%s'"), tmp);
>> +        goto error;
>> +    }
>> +
>> +    iothrid->defined = true;
>> +
>> + cleanup:
>> +    VIR_FREE(tmp);
>> +    ctxt->node = oldnode;
>> +    return iothrid;
>> +
>> + error:
>> +    VIR_FREE(iothrid);
>> +    goto cleanup;
>> +}
>> +
>> +
>>  /* Parse the XML definition for a vcpupin
>>   *
>>   * vcpupin has the form of
>> @@ -13948,6 +14029,32 @@ virDomainDefParseXML(xmlDocPtr xml,
>>      }
>>      VIR_FREE(tmp);
>>  
>> +    /* Extract any iothread id's defined */
>> +    if ((n = virXPathNodeSet("./iothreadids/iothread", ctxt, &nodes)) < 0)
>> +        goto error;
>> +
>> +    if (n > def->iothreads)
>> +        def->iothreads = n;
>> +
>> +    if (n && VIR_ALLOC_N(def->iothreadids, MAX(n, def->iothreads)) < 0)
>> +        goto error;
> 
> [1]
> 

Yes, the MAX(n, def->iothreads) was the prior code review suggestion...

So if I 'revert' back to just 'n', then let the above code handle the
rest, then these two issues should be resolved.

>> +
>> +    for (i = 0; i < n; i++) {
>> +        virDomainIOThreadIDDefPtr iothrid = NULL;
>> +        if (!(iothrid = virDomainIOThreadIDDefParseXML(nodes[i], ctxt)))
>> +            goto error;
>> +
>> +        if (virDomainIOThreadIDFind(def, iothrid->iothread_id)) {
>> +            virReportError(VIR_ERR_XML_ERROR,
>> +                           _("duplicate iothread id '%u' found"),
>> +                           iothrid->iothread_id);
>> +            VIR_FREE(iothrid);
>> +            goto error;
>> +        }
>> +        def->iothreadids[def->niothreadids++] = iothrid;
>> +    }
>> +    VIR_FREE(nodes);
>> +
>>      /* Extract cpu tunables. */
>>      if ((n = virXPathULong("string(./cputune/shares[1])", ctxt,
>>                             &def->cputune.shares)) < -1) {
>> @@ -17324,6 +17431,66 @@ virDomainDefAddImplicitControllers(virDomainDefPtr def)
>>      return 0;
>>  }
>>  
>> +virDomainIOThreadIDDefPtr
>> +virDomainIOThreadIDFind(virDomainDefPtr def,
>> +                        unsigned int iothread_id)
>> +{
>> +    size_t i;
>> +
>> +    if (!def->iothreadids || !def->niothreadids)
>> +        return NULL;
>> +
>> +    for (i = 0; i < def->niothreadids; i++) {
>> +        if (iothread_id == def->iothreadids[i]->iothread_id)
>> +            return def->iothreadids[i];
>> +    }
>> +
>> +    return NULL;
>> +}
>> +
>> +int
>> +virDomainIOThreadIDAdd(virDomainDefPtr def,
>> +                       unsigned int iothread_id)
> 
> If this function returned the pointer to the added structure you'd be
> able to use it later to modify other aspects of it.
> 

OK seems reasonable... had to change to using VIR_APPEND_ELEMENT_COPY too

>> +{
>> +    virDomainIOThreadIDDefPtr iothrid = NULL;
>> +
>> +    if (virDomainIOThreadIDFind(def, iothread_id)) {
>> +        virReportError(VIR_ERR_INTERNAL_ERROR,
>> +                       _("cannot duplicate iothread_id '%u' in iothreadids"),
>> +                       iothread_id);
>> +        return -1;
>> +    }
>> +
>> +    if (VIR_ALLOC(iothrid) < 0)
>> +        goto error;
>> +
>> +    iothrid->iothread_id = iothread_id;
>> +
>> +    if (VIR_APPEND_ELEMENT(def->iothreadids, def->niothreadids, iothrid) < 0)
>> +        goto error;
>> +
>> +    return 0;
>> +
>> + error:
>> +    VIR_FREE(iothrid);
>> +    return -1;
>> +}
>> +
>> +void
>> +virDomainIOThreadIDDel(virDomainDefPtr def,
>> +                       unsigned int iothread_id)
>> +{
>> +    int n;
>> +
>> +    for (n = 0; n < def->niothreadids; n++) {
>> +        if (def->iothreadids[n]->iothread_id == iothread_id) {
>> +            VIR_FREE(def->iothreadids[n]);
> 
> This could use a common freeing function, so that once you add more data
> you won't have to tweak it.
> 

So you'd prefer a 'common' free function that just calls VIR_FREE() -
that just seems like excessive overhead, but that's fine.

>> +            VIR_DELETE_ELEMENT(def->iothreadids, n, def->niothreadids);
>> +            return;
>> +        }
>> +    }
>> +}
>> +
>>  /* Check if vcpupin with same id already exists. */
>>  bool
>>  virDomainPinIsDuplicate(virDomainPinDefPtr *def,
>> @@ -20666,8 +20833,27 @@ virDomainDefFormatInternal(virDomainDefPtr def,
>>          virBufferAsprintf(buf, " current='%u'", def->vcpus);
>>      virBufferAsprintf(buf, ">%u</vcpu>\n", def->maxvcpus);
>>  
>> -    if (def->iothreads > 0)
>> -        virBufferAsprintf(buf, "<iothreads>%u</iothreads>\n", def->iothreads);
>> +    if (def->iothreads > 0) {
>> +        virBufferAsprintf(buf, "<iothreads>%u</iothreads>\n",
>> +                          def->iothreads);
>> +        /* If we parsed the iothreadids, then write out those that we parsed */
> 
> Seems rather obvious.
> 

As a reviewer for now, sure... But what about someone who reads this
code 6, 12, 18 months from now and wonders why the extra loop...

I can adjust the comment to be :

"Only print out iothreadids if we read at least one"

>> +        for (i = 0; i < def->niothreadids; i++) {
>> +            if (def->iothreadids[i]->defined)
>> +                break;
>> +        }
>> +        if (i < def->niothreadids) {
>> +            virBufferAddLit(buf, "<iothreadids>\n");
>> +            virBufferAdjustIndent(buf, 2);
>> +            for (i = 0; i < def->niothreadids; i++) {
>> +                if (!def->iothreadids[i]->defined)
>> +                    continue;
>> +                virBufferAsprintf(buf, "<iothread id='%u'/>\n",
>> +                                  def->iothreadids[i]->iothread_id);
>> +            }
>> +            virBufferAdjustIndent(buf, -2);
>> +            virBufferAddLit(buf, "</iothreadids>\n");
>> +        }
>> +    }
>>  
>>      if (def->cputune.sharesSpecified ||
>>          (def->cputune.nvcpupin && !virDomainIsAllVcpupinInherited(def)) ||
>> diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
>> index e6fa3c9..9e7bdf9 100644
>> --- a/src/conf/domain_conf.h
>> +++ b/src/conf/domain_conf.h
>> @@ -2041,6 +2041,14 @@ struct _virDomainHugePage {
>>      unsigned long long size;    /* hugepage size in KiB */
>>  };
>>  
>> +typedef struct _virDomainIOThreadIDDef virDomainIOThreadIDDef;
>> +typedef virDomainIOThreadIDDef *virDomainIOThreadIDDefPtr;
>> +
>> +struct _virDomainIOThreadIDDef {
>> +    bool defined;
> 
> You may want to invert this field, since the case where you add the
> thread structs due to the fact that <iohreads> was more than the count
> of entries is less common than other places that add the struct.
> 

Made for an awkward looking:

    for (i = 0; i < def->niothreadids; i++) {
        if (!def->iothreadids[i]->undefined)
            break;
    }



>> +    unsigned int iothread_id;
>> +};
>> +
>>  typedef struct _virDomainCputune virDomainCputune;
>>  typedef virDomainCputune *virDomainCputunePtr;
>>  
>> @@ -2132,6 +2140,8 @@ struct _virDomainDef {
>>      virBitmapPtr cpumask;
>>  
>>      unsigned int iothreads;
>> +    size_t niothreadids;
>> +    virDomainIOThreadIDDefPtr *iothreadids;
>>  
>>      virDomainCputune cputune;
>>  
>> @@ -2590,6 +2600,11 @@ bool virDomainDefCheckABIStability(virDomainDefPtr src,
>>  
>>  int virDomainDefAddImplicitControllers(virDomainDefPtr def);
>>  
>> +virDomainIOThreadIDDefPtr
>> +virDomainIOThreadIDFind(virDomainDefPtr def, unsigned int iothread_id);
> 
> Usually the return type is on the same line and the argument list is
> broken if it doesn't fit.
> 

OK - perhaps a relic of previous code where even the first argument made
the line too long - been too long to remember for sure.

>> +int virDomainIOThreadIDAdd(virDomainDefPtr def, unsigned int iothread_id);
>> +void virDomainIOThreadIDDel(virDomainDefPtr def, unsigned int iothread_id);
>> +
>>  unsigned int virDomainDefFormatConvertXMLFlags(unsigned int flags);
>>  
>>  char *virDomainDefFormat(virDomainDefPtr def,


Which gives the following to be squashed in (trying to make progress on
at least the first two patches which compile and pass tests):


diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 82c36a4..3ff06b6 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -2115,6 +2115,14 @@ virDomainPinDefCopy(virDomainPinDefPtr *src, int
npin)
 }


+void
+virDomainIOThreadIDDefFree(virDomainIOThreadIDDefPtr def)
+{
+    if (def)
+        VIR_FREE(def);
+}
+
+
 static void
 virDomainIOThreadIDDefArrayFree(virDomainIOThreadIDDefPtr *def,
                                 int nids)
@@ -2125,7 +2133,7 @@
virDomainIOThreadIDDefArrayFree(virDomainIOThreadIDDefPtr *def,
         return;

     for (i = 0; i < nids; i++)
-        VIR_FREE(def[i]);
+        virDomainIOThreadIDDefFree(def[i]);

     VIR_FREE(def);
 }
@@ -3322,8 +3330,11 @@ virDomainDefPostParseInternal(virDomainDefPtr def,
         unsigned int iothread_id = 1;
         while (def->niothreadids != def->iothreads) {
             if (!virDomainIOThreadIDFind(def, iothread_id)) {
-                if (virDomainIOThreadIDAdd(def, iothread_id) < 0)
+                virDomainIOThreadIDDefPtr iothrid;
+
+                if (!(iothrid = virDomainIOThreadIDAdd(def, iothread_id)))
                     return -1;
+                iothrid->undefined = true;
             }
             iothread_id++;
         }
@@ -13216,15 +13227,13 @@ virDomainIOThreadIDDefParseXML(xmlNodePtr node,
         goto error;
     }

-    iothrid->defined = true;
-
  cleanup:
     VIR_FREE(tmp);
     ctxt->node = oldnode;
     return iothrid;

  error:
-    VIR_FREE(iothrid);
+    virDomainIOThreadIDDefFree(iothrid);
     goto cleanup;
 }

@@ -14042,7 +14051,7 @@ virDomainDefParseXML(xmlDocPtr xml,
     if (n > def->iothreads)
         def->iothreads = n;

-    if (n && VIR_ALLOC_N(def->iothreadids, MAX(n, def->iothreads)) < 0)
+    if (n && VIR_ALLOC_N(def->iothreadids, n) < 0)
         goto error;

     for (i = 0; i < n; i++) {
@@ -14054,7 +14063,7 @@ virDomainDefParseXML(xmlDocPtr xml,
             virReportError(VIR_ERR_XML_ERROR,
                            _("duplicate iothread id '%u' found"),
                            iothrid->iothread_id);
-            VIR_FREE(iothrid);
+            virDomainIOThreadIDDefFree(iothrid);
             goto error;
         }
         def->iothreadids[def->niothreadids++] = iothrid;
@@ -17362,7 +17371,7 @@ virDomainIOThreadIDFind(virDomainDefPtr def,
     return NULL;
 }

-int
+virDomainIOThreadIDDefPtr
 virDomainIOThreadIDAdd(virDomainDefPtr def,
                        unsigned int iothread_id)
 {
@@ -17372,7 +17381,7 @@ virDomainIOThreadIDAdd(virDomainDefPtr def,
         virReportError(VIR_ERR_INTERNAL_ERROR,
                       _("cannot duplicate iothread_id '%u' in
iothreadids"),
                        iothread_id);
-        return -1;
+        return NULL;
     }

     if (VIR_ALLOC(iothrid) < 0)
@@ -17380,14 +17389,15 @@ virDomainIOThreadIDAdd(virDomainDefPtr def,

     iothrid->iothread_id = iothread_id;

-    if (VIR_APPEND_ELEMENT(def->iothreadids, def->niothreadids,
iothrid) < 0)
+    if (VIR_APPEND_ELEMENT_COPY(def->iothreadids, def->niothreadids,
+                                iothrid) < 0)
         goto error;

-    return 0;
+    return iothrid;

  error:
-    VIR_FREE(iothrid);
-    return -1;
+    virDomainIOThreadIDDefFree(iothrid);
+    return NULL;
 }

 void
@@ -17398,7 +17408,7 @@ virDomainIOThreadIDDel(virDomainDefPtr def,

     for (n = 0; n < def->niothreadids; n++) {
         if (def->iothreadids[n]->iothread_id == iothread_id) {
-            VIR_FREE(def->iothreadids[n]);
+            virDomainIOThreadIDDefFree(def->iothreadids[n]);
             VIR_DELETE_ELEMENT(def->iothreadids, n, def->niothreadids);
             return;
         }
@@ -20749,16 +20759,16 @@ virDomainDefFormatInternal(virDomainDefPtr def,
     if (def->iothreads > 0) {
         virBufferAsprintf(buf, "<iothreads>%u</iothreads>\n",
                           def->iothreads);
-        /* If we parsed the iothreadids, then write out those that we
parsed */
+        /* Only print out iothreadids if we read at least one */
         for (i = 0; i < def->niothreadids; i++) {
-            if (def->iothreadids[i]->defined)
+            if (!def->iothreadids[i]->undefined)
                 break;
         }
         if (i < def->niothreadids) {
             virBufferAddLit(buf, "<iothreadids>\n");
             virBufferAdjustIndent(buf, 2);
             for (i = 0; i < def->niothreadids; i++) {
-                if (!def->iothreadids[i]->defined)
+                if (def->iothreadids[i]->undefined)
                     continue;
                 virBufferAsprintf(buf, "<iothread id='%u'/>\n",
                                   def->iothreadids[i]->iothread_id);
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 01dc1f9..32de301 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -2058,10 +2058,12 @@ typedef struct _virDomainIOThreadIDDef
virDomainIOThreadIDDef;
 typedef virDomainIOThreadIDDef *virDomainIOThreadIDDefPtr;

 struct _virDomainIOThreadIDDef {
-    bool defined;
+    bool undefined;
     unsigned int iothread_id;
 };

+void virDomainIOThreadIDDefFree(virDomainIOThreadIDDefPtr def);
+
 typedef struct _virDomainCputune virDomainCputune;
 typedef virDomainCputune *virDomainCputunePtr;

@@ -2612,9 +2614,10 @@ bool
virDomainDefCheckABIStability(virDomainDefPtr src,

 int virDomainDefAddImplicitControllers(virDomainDefPtr def);

-virDomainIOThreadIDDefPtr
-virDomainIOThreadIDFind(virDomainDefPtr def, unsigned int iothread_id);
-int virDomainIOThreadIDAdd(virDomainDefPtr def, unsigned int iothread_id);
+virDomainIOThreadIDDefPtr virDomainIOThreadIDFind(virDomainDefPtr def,
+                                                  unsigned int
iothread_id);
+virDomainIOThreadIDDefPtr virDomainIOThreadIDAdd(virDomainDefPtr def,
+                                                 unsigned int iothread_id);
 void virDomainIOThreadIDDel(virDomainDefPtr def, unsigned int iothread_id);

 unsigned int virDomainDefFormatConvertXMLFlags(unsigned int flags);
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 649ed8f..ac35f1b 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -325,6 +325,7 @@ virDomainHypervTypeFromString;
 virDomainHypervTypeToString;
 virDomainInputDefFree;
 virDomainIOThreadIDAdd;
+virDomainIOThreadIDDefFree;
 virDomainIOThreadIDDel;
 virDomainIOThreadIDFind;
 virDomainLeaseDefFree;

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