File 0a301b19-qemu-dont-assume-qemukvm.patch of Package libvirt

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File 0a301b19-qemu-dont-assume-qemukvm.patch of Package libvirt

commit 0a301b1969f2e25127ab7bf5733c3e35dd778aac
Author: Andrea Bolognani <abologna@redhat.com>
Date:   Thu Mar 31 11:00:38 2022 +0200

qemu: Don't assume that /usr/libexec/qemu-kvm exists
    
    On a machine where no QEMU binary is installed, we end up logging
    
      libvirtd: Cannot check QEMU binary /usr/libexec/qemu-kvm:
      No such file or directory
    
    which is not very useful in general, and downright misleading in
    the case of operating systems that are not derived from RHEL.
    
    This is a consequence of treating that specific path in a different
    way from all other possible QEMU binary paths, and specifically of
    not checking whether the file actually exists but sort of assuming
    that it must do if we haven't found another QEMU binary earlier.
    
    Address the issue by trying this path out in
    virQEMUCapsFindBinaryForArch(), along with all the other possible
    ones, and making sure it exists before returning it.
    
    Reported-by: Jim Fehlig <jfehlig@suse.com>
    Signed-off-by: Andrea Bolognani <abologna@redhat.com>
    Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
    Tested-by: Jim Fehlig <jfehlig@suse.com>

Index: libvirt-8.0.0/src/qemu/qemu_capabilities.c
===================================================================
--- libvirt-8.0.0.orig/src/qemu/qemu_capabilities.c
+++ libvirt-8.0.0/src/qemu/qemu_capabilities.c
@@ -903,6 +903,13 @@ virQEMUCapsFindBinaryForArch(virArch hos
             return binary;
     }
 
+    /* RHEL doesn't follow the usual naming for QEMU binaries and ships
+     * a single binary named qemu-kvm outside of $PATH instead */
+    if (virQEMUCapsGuestIsNative(hostarch, guestarch)) {
+        if ((binary = virFindFileInPath("/usr/libexec/qemu-kvm")))
+            return binary;
+    }
+
     return NULL;
 }
 
@@ -911,18 +918,7 @@ char *
 virQEMUCapsGetDefaultEmulator(virArch hostarch,
                               virArch guestarch)
 {
-    char *binary = NULL;
-    /* Check for existence of base emulator, or alternate base
-     * which can be used with magic cpu choice
-     */
-    binary = virQEMUCapsFindBinaryForArch(hostarch, guestarch);
-
-    /* RHEL doesn't follow the usual naming for QEMU binaries and ships
-     * a single binary named qemu-kvm outside of $PATH instead */
-    if (virQEMUCapsGuestIsNative(hostarch, guestarch) && !binary)
-        binary = g_strdup("/usr/libexec/qemu-kvm");
-
-    return binary;
+    return virQEMUCapsFindBinaryForArch(hostarch, guestarch);
 }

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File 0a301b19-qemu-dont-assume-qemukvm.patch of Package libvirt

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