|
 |
0a122b |
From 1eae92fe23ff0e5ba28374220417a44920192ee4 Mon Sep 17 00:00:00 2001
|
|
|
0a122b |
Message-Id: <1eae92fe23ff0e5ba28374220417a44920192ee4.1389014116.git.minovotn@redhat.com>
|
|
|
0a122b |
In-Reply-To: <c8cc35838d42aa286242772d97e3a9be7bb786ba.1389014116.git.minovotn@redhat.com>
|
|
|
0a122b |
References: <c8cc35838d42aa286242772d97e3a9be7bb786ba.1389014116.git.minovotn@redhat.com>
|
|
|
0a122b |
From: Paolo Bonzini <pbonzini@redhat.com>
|
|
|
0a122b |
Date: Mon, 9 Dec 2013 14:08:57 +0100
|
|
|
0a122b |
Subject: [PATCH 09/50] block: add logical block provisioning info to
|
|
|
0a122b |
BlockDriverInfo
|
|
|
0a122b |
|
|
|
0a122b |
RH-Author: Paolo Bonzini <pbonzini@redhat.com>
|
|
|
0a122b |
Message-id: <1386598178-11845-12-git-send-email-pbonzini@redhat.com>
|
|
|
0a122b |
Patchwork-id: 56051
|
|
|
0a122b |
O-Subject: [RHEL 7.0 qemu-kvm PATCH 11/52] block: add logical block provisioning info to BlockDriverInfo
|
|
|
0a122b |
Bugzilla: 1007815
|
|
|
0a122b |
RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
|
|
|
0a122b |
RH-Acked-by: Fam Zheng <famz@redhat.com>
|
|
|
0a122b |
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
|
0a122b |
|
|
|
0a122b |
From: Peter Lieven <pl@kamp.de>
|
|
|
0a122b |
|
|
|
0a122b |
Reviewed-by: Eric Blake <eblake@redhat.com>
|
|
|
0a122b |
Signed-off-by: Peter Lieven <pl@kamp.de>
|
|
|
0a122b |
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
|
0a122b |
(cherry picked from commit e1a5c4bed44bc23f69f53883c657e31e150cab30)
|
|
|
0a122b |
---
|
|
|
0a122b |
include/block/block.h | 16 ++++++++++++++++
|
|
|
0a122b |
1 file changed, 16 insertions(+)
|
|
|
0a122b |
|
|
|
0a122b |
Signed-off-by: Michal Novotny <minovotn@redhat.com>
|
|
|
0a122b |
---
|
|
|
0a122b |
include/block/block.h | 16 ++++++++++++++++
|
|
|
0a122b |
1 file changed, 16 insertions(+)
|
|
|
0a122b |
|
|
|
0a122b |
diff --git a/include/block/block.h b/include/block/block.h
|
|
|
0a122b |
index 10abc00..ab3044e 100644
|
|
|
0a122b |
--- a/include/block/block.h
|
|
|
0a122b |
+++ b/include/block/block.h
|
|
|
0a122b |
@@ -18,6 +18,22 @@ typedef struct BlockDriverInfo {
|
|
|
0a122b |
/* offset at which the VM state can be saved (0 if not possible) */
|
|
|
0a122b |
int64_t vm_state_offset;
|
|
|
0a122b |
bool is_dirty;
|
|
|
0a122b |
+ /*
|
|
|
0a122b |
+ * True if unallocated blocks read back as zeroes. This is equivalent
|
|
|
0a122b |
+ * to the the LBPRZ flag in the SCSI logical block provisioning page.
|
|
|
0a122b |
+ */
|
|
|
0a122b |
+ bool unallocated_blocks_are_zero;
|
|
|
0a122b |
+ /*
|
|
|
0a122b |
+ * True if the driver can optimize writing zeroes by unmapping
|
|
|
0a122b |
+ * sectors. This is equivalent to the BLKDISCARDZEROES ioctl in Linux
|
|
|
0a122b |
+ * with the difference that in qemu a discard is allowed to silently
|
|
|
0a122b |
+ * fail. Therefore we have to use bdrv_write_zeroes with the
|
|
|
0a122b |
+ * BDRV_REQ_MAY_UNMAP flag for an optimized zero write with unmapping.
|
|
|
0a122b |
+ * After this call the driver has to guarantee that the contents read
|
|
|
0a122b |
+ * back as zero. It is additionally required that the block device is
|
|
|
0a122b |
+ * opened with BDRV_O_UNMAP flag for this to work.
|
|
|
0a122b |
+ */
|
|
|
0a122b |
+ bool can_write_zeroes_with_unmap;
|
|
|
0a122b |
} BlockDriverInfo;
|
|
|
0a122b |
|
|
|
0a122b |
typedef struct BlockFragInfo {
|
|
|
0a122b |
--
|
|
|
0a122b |
1.7.11.7
|
|
|
0a122b |
|