diff mbox series

[32/97] vl: Fix -drive / -blockdev persistent reservation management

Message ID 20191001234616.7825-33-mdroth@linux.vnet.ibm.com
State New
Headers show
Series Patch Round-up for stable 4.0.1, freeze on 2019-10-10 | expand

Commit Message

Michael Roth Oct. 1, 2019, 11:45 p.m. UTC 
From: Markus Armbruster <armbru@redhat.com>

qemu-system-FOO's main() acts on command line arguments in its own
idiosyncratic order.  There's not much method to its madness.
Whenever we find a case where one kind of command line argument needs
to refer to something created for another kind later, we rejigger the
order.

Recent commit cda4aa9a5a "vl: Create block backends before setting
machine properties" was such a rejigger.  Block backends are now
created before "delayed" objects.  This broke persistent reservation
management.  Reproducer:

    $ qemu-system-x86_64 -object pr-manager-helper,id=pr-helper0,path=/tmp/pr-helper0.sock-drive -drive file=/dev/mapper/crypt,file.pr-manager=pr-helper0,format=raw,if=none,id=drive-scsi0-0-0-2
    qemu-system-x86_64: -drive file=/dev/mapper/crypt,file.pr-manager=pr-helper0,format=raw,if=none,id=drive-scsi0-0-0-2: No persistent reservation manager with id 'pr-helper0'

The delayed pr-manager-helper object is created too late for use by
-drive or -blockdev.  Normal objects are still created in time.

pr-manager-helper has always been a delayed object (commit 7c9e527659
"scsi, file-posix: add support for persistent reservation
management").  Turns out there's no real reason for that.  Make it a
normal object.

Fixes: cda4aa9a5a08777cf13e164c0543bd4888b8adce
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20190604151251.9903-2-armbru@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 9ea18ed25a36527167e9676f25d983df5e7f76e6)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 vl.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/vl.c b/vl.c
index c696ad2a13..c3dee09c9b 100644
--- a/vl.c
+++ b/vl.c
@@ -2825,8 +2825,7 @@  static bool object_create_initial(const char *type, QemuOpts *opts)
         exit(0);
     }
 
-    if (g_str_equal(type, "rng-egd") ||
-        g_str_has_prefix(type, "pr-manager-")) {
+    if (g_str_equal(type, "rng-egd")) {
         return false;
     }