From: Pavel Hrdina <phrdina@redhat.com>
Date: Sun, 15 Feb 2026 14:32:24 +0000 (+0100)
Subject: util: Move openning IOMMU device to viriommufd
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c684b83a68158cd15e262523db11259c9edabe4a;p=thirdparty%2Flibvirt.git

util: Move openning IOMMU device to viriommufd

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
---

diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 2f9fdc04ad..576b1f6595 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -2648,7 +2648,7 @@ virInitctlFifos;
 virInitctlSetRunLevel;
 
 # util/viriommufd.h
-virIOMMUFDSetRLimitMode;
+virIOMMUFDOpenDevice;
 virIOMMUFDSupported;
 
 # util/viriscsi.h
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index fd400ae8a6..9b459f47ca 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -7693,15 +7693,8 @@ qemuProcessOpenIommuFd(virDomainObj *vm)
 
     VIR_DEBUG("Opening IOMMU FD for domain %s", vm->def->name);
 
-    if ((fd = open(VIR_IOMMU_DEV_PATH, O_RDWR | O_CLOEXEC)) < 0) {
-        virReportSystemError(errno, "%s", _("cannot open /dev/iommu"));
+    if ((fd = virIOMMUFDOpenDevice()) < 0)
         return -1;
-    }
-
-    if (virIOMMUFDSetRLimitMode(fd, true) < 0) {
-        VIR_FORCE_CLOSE(fd);
-        return -1;
-    }
 
     VIR_DEBUG("Opened IOMMU FD %d for domain %s", fd, vm->def->name);
     return fd;
diff --git a/src/util/viriommufd.c b/src/util/viriommufd.c
index 44b30029a5..1f3353eab4 100644
--- a/src/util/viriommufd.c
+++ b/src/util/viriommufd.c
@@ -1,5 +1,7 @@
 #include <config.h>
 
+#include <fcntl.h>
+
 #include "viriommufd.h"
 #include "virlog.h"
 #include "virerror.h"
@@ -54,7 +56,7 @@ struct iommu_option {
  *
  * Returns: 0 on success, -1 on error
  */
-int
+static int
 virIOMMUFDSetRLimitMode(int fd, bool processAccounting)
 {
     struct iommu_option option = {
@@ -77,10 +79,24 @@ virIOMMUFDSetRLimitMode(int fd, bool processAccounting)
     return 0;
 }
 
+int
+virIOMMUFDOpenDevice(void)
+{
+    int fd = -1;
+
+    if ((fd = open(VIR_IOMMU_DEV_PATH, O_RDWR | O_CLOEXEC)) < 0)
+        virReportSystemError(errno, "%s", _("cannot open IOMMUFD device"));
+
+    if (virIOMMUFDSetRLimitMode(fd, true) < 0)
+        return -1;
+
+    return fd;
+}
+
 #else
 
-int virIOMMUFDSetRLimitMode(int fd G_GNUC_UNUSED,
-                            bool processAccounting G_GNUC_UNUSED)
+int
+virIOMMUFDOpenDevice(void)
 {
     virReportError(VIR_ERR_NO_SUPPORT, "%s",
                    _("IOMMUFD is not supported on this platform"));
diff --git a/src/util/viriommufd.h b/src/util/viriommufd.h
index ec6be9fa66..223f44eb5c 100644
--- a/src/util/viriommufd.h
+++ b/src/util/viriommufd.h
@@ -22,6 +22,6 @@
 
 #define VIR_IOMMU_DEV_PATH "/dev/iommu"
 
-int virIOMMUFDSetRLimitMode(int fd, bool processAccounting);
+int virIOMMUFDOpenDevice(void);
 
 bool virIOMMUFDSupported(void);