From df5a366613d42ec2dc5dae33e10b6fdd5db09e0d Mon Sep 17 00:00:00 2001
From: John Snow <jsnow@redhat.com>
Date: Mon, 6 May 2019 17:56:19 +0200
Subject: [PATCH 09/53] nbd/client: Report offsets in bdrv_block_status
RH-Author: John Snow <jsnow@redhat.com>
Message-id: <20190506175629.11079-10-jsnow@redhat.com>
Patchwork-id: 87199
O-Subject: [RHEL-7.7 qemu-kvm-rhev PATCH 09/19] nbd/client: Report offsets in bdrv_block_status
Bugzilla: 1692018
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Acked-by: Thomas Huth <thuth@redhat.com>
From: Eric Blake <eblake@redhat.com>
It is desirable for 'qemu-img map' to have the same output for a file
whether it is served over file or nbd protocols. However, ever since
we implemented block status for NBD (2.12), the NBD protocol forgot to
inform the block layer that as the final layer in the chain, the
offset is valid; without an offset, the human-readable form of
qemu-img map gives up with the unhelpful:
$ nbdkit -U - data data="1" size=512 --run 'qemu-img map $nbd'
Offset Length Mapped to File
qemu-img: File contains external, encrypted or compressed clusters.
The --output=json form always works, because it is reporting the
lower-level bdrv_block_status results directly rather than trying to
filter out sparse ranges for human consumption - but now it also
shows the offset member.
With this patch, the human output changes to:
Offset Length Mapped to File
0 0x200 0 nbd+unix://?socket=/tmp/nbdkitOxeoLa/socket
This change is observable to several iotests.
Fixes: 78a33ab5
Reported-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190329042750.14704-4-eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
(cherry picked from commit a62a85ef5ccd764d03d72d6c3cd558f9755b3457)
Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
block/nbd-client.c | 9 +++++++--
tests/qemu-iotests/209.out | 4 ++--
tests/qemu-iotests/223.out | 18 +++++++++---------
tests/qemu-iotests/241.out | 6 +++---
4 files changed, 21 insertions(+), 16 deletions(-)
diff --git a/block/nbd-client.c b/block/nbd-client.c
index 09e20b2..9b5779f 100644
--- a/block/nbd-client.c
+++ b/block/nbd-client.c
@@ -959,7 +959,9 @@ int coroutine_fn nbd_client_co_block_status(BlockDriverState *bs,
if (!client->info.base_allocation) {
*pnum = bytes;
- return BDRV_BLOCK_DATA;
+ *map = offset;
+ *file = bs;
+ return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
}
ret = nbd_co_send_request(bs, &request, NULL);
@@ -982,8 +984,11 @@ int coroutine_fn nbd_client_co_block_status(BlockDriverState *bs,
assert(extent.length);
*pnum = extent.length;
+ *map = offset;
+ *file = bs;
return (extent.flags & NBD_STATE_HOLE ? 0 : BDRV_BLOCK_DATA) |
- (extent.flags & NBD_STATE_ZERO ? BDRV_BLOCK_ZERO : 0);
+ (extent.flags & NBD_STATE_ZERO ? BDRV_BLOCK_ZERO : 0) |
+ BDRV_BLOCK_OFFSET_VALID;
}
void nbd_client_detach_aio_context(BlockDriverState *bs)
diff --git a/tests/qemu-iotests/209.out b/tests/qemu-iotests/209.out
index 0d29724..214e27b 100644
--- a/tests/qemu-iotests/209.out
+++ b/tests/qemu-iotests/209.out
@@ -1,2 +1,2 @@
-[{ "start": 0, "length": 524288, "depth": 0, "zero": false, "data": true},
-{ "start": 524288, "length": 524288, "depth": 0, "zero": true, "data": false}]
+[{ "start": 0, "length": 524288, "depth": 0, "zero": false, "data": true, "offset": 0},
+{ "start": 524288, "length": 524288, "depth": 0, "zero": true, "data": false, "offset": 524288}]
diff --git a/tests/qemu-iotests/223.out b/tests/qemu-iotests/223.out
index 0524ffb..a620f82 100644
--- a/tests/qemu-iotests/223.out
+++ b/tests/qemu-iotests/223.out
@@ -67,18 +67,18 @@ read 1048576/1048576 bytes at offset 1048576
1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 2097152/2097152 bytes at offset 2097152
2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 4096, "depth": 0, "zero": false, "data": true},
-{ "start": 4096, "length": 1044480, "depth": 0, "zero": true, "data": false},
-{ "start": 1048576, "length": 3145728, "depth": 0, "zero": false, "data": true}]
+[{ "start": 0, "length": 4096, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
+{ "start": 4096, "length": 1044480, "depth": 0, "zero": true, "data": false, "offset": OFFSET},
+{ "start": 1048576, "length": 3145728, "depth": 0, "zero": false, "data": true, "offset": OFFSET}]
[{ "start": 0, "length": 65536, "depth": 0, "zero": false, "data": false},
-{ "start": 65536, "length": 2031616, "depth": 0, "zero": false, "data": true},
+{ "start": 65536, "length": 2031616, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
{ "start": 2097152, "length": 2097152, "depth": 0, "zero": false, "data": false}]
=== Contrast to small granularity dirty-bitmap ===
-[{ "start": 0, "length": 512, "depth": 0, "zero": false, "data": true},
+[{ "start": 0, "length": 512, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
{ "start": 512, "length": 512, "depth": 0, "zero": false, "data": false},
-{ "start": 1024, "length": 2096128, "depth": 0, "zero": false, "data": true},
+{ "start": 1024, "length": 2096128, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
{ "start": 2097152, "length": 2097152, "depth": 0, "zero": false, "data": false}]
=== End qemu NBD server ===
@@ -94,10 +94,10 @@ read 2097152/2097152 bytes at offset 2097152
=== Use qemu-nbd as server ===
[{ "start": 0, "length": 65536, "depth": 0, "zero": false, "data": false},
-{ "start": 65536, "length": 2031616, "depth": 0, "zero": false, "data": true},
+{ "start": 65536, "length": 2031616, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
{ "start": 2097152, "length": 2097152, "depth": 0, "zero": false, "data": false}]
-[{ "start": 0, "length": 512, "depth": 0, "zero": false, "data": true},
+[{ "start": 0, "length": 512, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
{ "start": 512, "length": 512, "depth": 0, "zero": false, "data": false},
-{ "start": 1024, "length": 2096128, "depth": 0, "zero": false, "data": true},
+{ "start": 1024, "length": 2096128, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
{ "start": 2097152, "length": 2097152, "depth": 0, "zero": false, "data": false}]
*** done
diff --git a/tests/qemu-iotests/241.out b/tests/qemu-iotests/241.out
index b76a623..f22eabb 100644
--- a/tests/qemu-iotests/241.out
+++ b/tests/qemu-iotests/241.out
@@ -4,7 +4,7 @@ QA output created by 241
size: 1024
min block: 512
-[{ "start": 0, "length": 1024, "depth": 0, "zero": false, "data": true}]
+[{ "start": 0, "length": 1024, "depth": 0, "zero": false, "data": true, "offset": OFFSET}]
1 KiB (0x400) bytes allocated at offset 0 bytes (0x0)
=== Exporting unaligned raw image, forced server sector alignment ===
@@ -14,13 +14,13 @@ WARNING: Image format was not specified for '/home/eblake/qemu/tests/qemu-iotest
Specify the 'raw' format explicitly to remove the restrictions.
size: 1024
min block: 512
-[{ "start": 0, "length": 1024, "depth": 0, "zero": false, "data": true}]
+[{ "start": 0, "length": 1024, "depth": 0, "zero": false, "data": true, "offset": OFFSET}]
1 KiB (0x400) bytes allocated at offset 0 bytes (0x0)
=== Exporting unaligned raw image, forced client sector alignment ===
size: 1024
min block: 512
-[{ "start": 0, "length": 1024, "depth": 0, "zero": false, "data": true}]
+[{ "start": 0, "length": 1024, "depth": 0, "zero": false, "data": true, "offset": OFFSET}]
1 KiB (0x400) bytes allocated at offset 0 bytes (0x0)
*** done
--
1.8.3.1