libvirt/SOURCES/libvirt-RHEL-qemu-Add-ability-to-set-sgio-values-for-hostdev.patch

From d6956a1aaa8757fab60132c3ee46c2bb199a78a8 Mon Sep 17 00:00:00 2001
Message-Id: <d6956a1aaa8757fab60132c3ee46c2bb199a78a8@dist-git>
From: John Ferlan <jferlan@redhat.com>
Date: Mon, 17 Dec 2018 20:42:30 -0500
Subject: [PATCH] RHEL: qemu: Add ability to set sgio values for hostdev
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https://bugzilla.redhat.com/show_bug.cgi?id=1582424

RHEL-only

Add necessary checks in order to allow setting sgio values for a scsi
host device

Signed-off-by: John Ferlan <jferlan@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
---
 src/qemu/qemu_conf.c | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c
index 6077457ff4..ba85fc6e22 100644
--- a/src/qemu/qemu_conf.c
+++ b/src/qemu/qemu_conf.c
@@ -1841,8 +1841,9 @@ qemuSetUnprivSGIO(virDomainDeviceDef *dev)
     virDomainDiskDef *disk = NULL;
     virDomainHostdevDef *hostdev = NULL;
     g_autofree char *sysfs_path = NULL;
+    g_autofree char *hostdev_path = NULL;
     const char *path = NULL;
-    int val = -1;
+    int val = 0;
 
     /* "sgio" is only valid for block disk; cdrom
      * and floopy disk can have empty source.
@@ -1858,17 +1859,14 @@ qemuSetUnprivSGIO(virDomainDeviceDef *dev)
     } else if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV) {
         hostdev = dev->data.hostdev;
 
-        if (!qemuIsSharedHostdev(hostdev))
+        if (hostdev->source.subsys.u.scsi.protocol ==
+            VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_ISCSI)
             return 0;
 
-        if (hostdev->source.subsys.u.scsi.sgio) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("'sgio' is not supported for SCSI "
-                             "generic device yet "));
+        if (!(hostdev_path = qemuGetHostdevPath(hostdev)))
             return -1;
-        }
 
-        return 0;
+        path = hostdev_path;
     } else {
         return 0;
     }
@@ -1877,7 +1875,16 @@ qemuSetUnprivSGIO(virDomainDeviceDef *dev)
         return -1;
 
     /* By default, filter the SG_IO commands, i.e. set unpriv_sgio to 0.  */
-    val = (disk->sgio == VIR_DOMAIN_DEVICE_SGIO_UNFILTERED);
+    if (dev->type == VIR_DOMAIN_DEVICE_DISK) {
+        if (disk->sgio == VIR_DOMAIN_DEVICE_SGIO_UNFILTERED)
+            val = 1;
+    } else {
+        /* Only settable if <shareable/> was present for hostdev */
+        if (qemuIsSharedHostdev(hostdev) &&
+            hostdev->source.subsys.u.scsi.sgio ==
+            VIR_DOMAIN_DEVICE_SGIO_UNFILTERED)
+            val = 1;
+    }
 
     /* Do not do anything if unpriv_sgio is not supported by the kernel and the
      * whitelist is enabled.  But if requesting unfiltered access, always call
-- 
2.34.1