From: Stefan Hajnoczi <stefanha@redhat.com>
To: Peter Maydell <peter.maydell@linaro.org>, qemu-devel@nongnu.org
Cc: "Kevin Wolf" <kwolf@redhat.com>,
"Laurent Vivier" <lvivier@redhat.com>,
"Thomas Huth" <thuth@redhat.com>,
"Vladimir Sementsov-Ogievskiy" <vsementsov@virtuozzo.com>,
"Daniel P. Berrangé" <berrange@redhat.com>,
"Eduardo Habkost" <ehabkost@redhat.com>,
qemu-block@nongnu.org, "Markus Armbruster" <armbru@redhat.com>,
"Coiby Xu" <Coiby.Xu@gmail.com>, "Max Reitz" <mreitz@redhat.com>,
"Alberto Garcia" <berto@igalia.com>,
"Stefan Hajnoczi" <stefanha@redhat.com>,
"Cleber Rosa" <crosa@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Fam Zheng" <fam@euphon.net>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>
Subject: [PULL v2 27/30] block/io: bdrv_common_block_status_above: support include_base
Date: Mon, 12 Oct 2020 19:27:57 +0100 [thread overview]
Message-ID: <20201012182800.157697-28-stefanha@redhat.com> (raw)
In-Reply-To: <20201012182800.157697-1-stefanha@redhat.com>
From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
In order to reuse bdrv_common_block_status_above in
bdrv_is_allocated_above, let's support include_base parameter.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20200924194003.22080-3-vsementsov@virtuozzo.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block/coroutines.h | 2 ++
block/io.c | 21 ++++++++++++++-------
2 files changed, 16 insertions(+), 7 deletions(-)
diff --git a/block/coroutines.h b/block/coroutines.h
index f69179f5ef..1cb3128b94 100644
--- a/block/coroutines.h
+++ b/block/coroutines.h
@@ -41,6 +41,7 @@ bdrv_pwritev(BdrvChild *child, int64_t offset, unsigned int bytes,
int coroutine_fn
bdrv_co_common_block_status_above(BlockDriverState *bs,
BlockDriverState *base,
+ bool include_base,
bool want_zero,
int64_t offset,
int64_t bytes,
@@ -50,6 +51,7 @@ bdrv_co_common_block_status_above(BlockDriverState *bs,
int generated_co_wrapper
bdrv_common_block_status_above(BlockDriverState *bs,
BlockDriverState *base,
+ bool include_base,
bool want_zero,
int64_t offset,
int64_t bytes,
diff --git a/block/io.c b/block/io.c
index a718d50ca2..86f76d04bf 100644
--- a/block/io.c
+++ b/block/io.c
@@ -2343,6 +2343,7 @@ early_out:
int coroutine_fn
bdrv_co_common_block_status_above(BlockDriverState *bs,
BlockDriverState *base,
+ bool include_base,
bool want_zero,
int64_t offset,
int64_t bytes,
@@ -2354,10 +2355,11 @@ bdrv_co_common_block_status_above(BlockDriverState *bs,
BlockDriverState *p;
int64_t eof = 0;
- assert(bs != base);
+ assert(include_base || bs != base);
+ assert(!include_base || base); /* Can't include NULL base */
ret = bdrv_co_block_status(bs, want_zero, offset, bytes, pnum, map, file);
- if (ret < 0 || *pnum == 0 || ret & BDRV_BLOCK_ALLOCATED) {
+ if (ret < 0 || *pnum == 0 || ret & BDRV_BLOCK_ALLOCATED || bs == base) {
return ret;
}
@@ -2368,7 +2370,7 @@ bdrv_co_common_block_status_above(BlockDriverState *bs,
assert(*pnum <= bytes);
bytes = *pnum;
- for (p = bdrv_filter_or_cow_bs(bs); p != base;
+ for (p = bdrv_filter_or_cow_bs(bs); include_base || p != base;
p = bdrv_filter_or_cow_bs(p))
{
ret = bdrv_co_block_status(p, want_zero, offset, bytes, pnum, map,
@@ -2406,6 +2408,11 @@ bdrv_co_common_block_status_above(BlockDriverState *bs,
break;
}
+ if (p == base) {
+ assert(include_base);
+ break;
+ }
+
/*
* OK, [offset, offset + *pnum) region is unallocated on this layer,
* let's continue the diving.
@@ -2425,7 +2432,7 @@ int bdrv_block_status_above(BlockDriverState *bs, BlockDriverState *base,
int64_t offset, int64_t bytes, int64_t *pnum,
int64_t *map, BlockDriverState **file)
{
- return bdrv_common_block_status_above(bs, base, true, offset, bytes,
+ return bdrv_common_block_status_above(bs, base, false, true, offset, bytes,
pnum, map, file);
}
@@ -2442,9 +2449,9 @@ int coroutine_fn bdrv_is_allocated(BlockDriverState *bs, int64_t offset,
int ret;
int64_t dummy;
- ret = bdrv_common_block_status_above(bs, bdrv_filter_or_cow_bs(bs), false,
- offset, bytes, pnum ? pnum : &dummy,
- NULL, NULL);
+ ret = bdrv_common_block_status_above(bs, bs, true, false, offset,
+ bytes, pnum ? pnum : &dummy, NULL,
+ NULL);
if (ret < 0) {
return ret;
}
--
2.26.2
next prev parent reply other threads:[~2020-10-12 18:51 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-12 18:27 [PULL v2 00/30] Block patches Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 01/30] block/nvme: Add driver statistics for access alignment and hw errors Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 02/30] libvhost-user: Allow vu_message_read to be replaced Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 03/30] libvhost-user: remove watch for kick_fd when de-initialize vu-dev Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 04/30] util/vhost-user-server: generic vhost user server Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 05/30] block: move logical block size check function to a common utility function Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 06/30] block/export: vhost-user block device backend server Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 07/30] test: new qTest case to test the vhost-user-blk-server Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 08/30] MAINTAINERS: Add vhost-user block device backend server maintainer Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 09/30] util/vhost-user-server: s/fileds/fields/ typo fix Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 10/30] util/vhost-user-server: drop unnecessary QOM cast Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 11/30] util/vhost-user-server: drop unnecessary watch deletion Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 12/30] block/export: consolidate request structs into VuBlockReq Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 13/30] util/vhost-user-server: drop unused DevicePanicNotifier Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 14/30] util/vhost-user-server: fix memory leak in vu_message_read() Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 15/30] util/vhost-user-server: check EOF when reading payload Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 16/30] util/vhost-user-server: rework vu_client_trip() coroutine lifecycle Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 17/30] block/export: report flush errors Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 18/30] block/export: convert vhost-user-blk server to block export API Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 19/30] util/vhost-user-server: move header to include/ Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 20/30] util/vhost-user-server: use static library in meson.build Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 21/30] qemu-storage-daemon: avoid compiling blockdev_ss twice Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 22/30] block: move block exports to libblockdev Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 23/30] block/export: add iothread and fixed-iothread options Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 24/30] block/export: add vhost-user-blk multi-queue support Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 25/30] tests/qtest: add multi-queue test case to vhost-user-blk-test Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 26/30] block/io: fix bdrv_co_block_status_above Stefan Hajnoczi
2020-10-12 18:27 ` Stefan Hajnoczi [this message]
2020-10-12 18:27 ` [PULL v2 28/30] block/io: bdrv_common_block_status_above: support bs == base Stefan Hajnoczi
2020-10-12 18:27 ` [PULL v2 29/30] block/io: fix bdrv_is_allocated_above Stefan Hajnoczi
2020-10-12 18:28 ` [PULL v2 30/30] iotests: add commit top->base cases to 274 Stefan Hajnoczi
2020-10-12 19:00 ` [PULL v2 00/30] Block patches no-reply
2020-10-12 21:48 ` Peter Maydell
2020-10-13 0:05 ` Eric Blake
2020-10-20 15:19 ` Stefan Hajnoczi
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