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[Qemu-devel] [PATCH v5 05/14] block/mirror: Use source as a BdrvChild
From: |
Max Reitz |
Subject: |
[Qemu-devel] [PATCH v5 05/14] block/mirror: Use source as a BdrvChild |
Date: |
Wed, 13 Jun 2018 20:18:14 +0200 |
With this, the mirror_top_bs is no longer just a technically required
node in the BDS graph but actually represents the block job operation.
Also, drop MirrorBlockJob.source, as we can reach it through
mirror_top_bs->backing.
Signed-off-by: Max Reitz <address@hidden>
Reviewed-by: Fam Zheng <address@hidden>
Reviewed-by: Alberto Garcia <address@hidden>
---
block/mirror.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/block/mirror.c b/block/mirror.c
index 7c1b8ef5b6..fa94fd9d17 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -41,7 +41,6 @@ typedef struct MirrorBlockJob {
BlockJob common;
BlockBackend *target;
BlockDriverState *mirror_top_bs;
- BlockDriverState *source;
BlockDriverState *base;
/* The name of the graph node to replace */
@@ -299,7 +298,6 @@ static void coroutine_fn mirror_co_read(void *opaque)
{
MirrorOp *op = opaque;
MirrorBlockJob *s = op->s;
- BlockBackend *source = s->common.blk;
int nb_chunks;
uint64_t ret;
uint64_t max_bytes;
@@ -349,7 +347,8 @@ static void coroutine_fn mirror_co_read(void *opaque)
s->bytes_in_flight += op->bytes;
trace_mirror_one_iteration(s, op->offset, op->bytes);
- ret = blk_co_preadv(source, op->offset, op->bytes, &op->qiov, 0);
+ ret = bdrv_co_preadv(s->mirror_top_bs->backing, op->offset, op->bytes,
+ &op->qiov, 0);
mirror_read_complete(op, ret);
}
@@ -427,7 +426,7 @@ static unsigned mirror_perform(MirrorBlockJob *s, int64_t
offset,
static uint64_t coroutine_fn mirror_iteration(MirrorBlockJob *s)
{
- BlockDriverState *source = s->source;
+ BlockDriverState *source = s->mirror_top_bs->backing->bs;
MirrorOp *pseudo_op;
int64_t offset;
uint64_t delay_ns = 0, ret = 0;
@@ -601,7 +600,7 @@ static void mirror_exit(Job *job, void *opaque)
BlockJob *bjob = &s->common;
MirrorExitData *data = opaque;
AioContext *replace_aio_context = NULL;
- BlockDriverState *src = s->source;
+ BlockDriverState *src = s->mirror_top_bs->backing->bs;
BlockDriverState *target_bs = blk_bs(s->target);
BlockDriverState *mirror_top_bs = s->mirror_top_bs;
Error *local_err = NULL;
@@ -716,7 +715,7 @@ static int coroutine_fn mirror_dirty_init(MirrorBlockJob *s)
{
int64_t offset;
BlockDriverState *base = s->base;
- BlockDriverState *bs = s->source;
+ BlockDriverState *bs = s->mirror_top_bs->backing->bs;
BlockDriverState *target_bs = blk_bs(s->target);
int ret;
int64_t count;
@@ -798,7 +797,7 @@ static void coroutine_fn mirror_run(void *opaque)
{
MirrorBlockJob *s = opaque;
MirrorExitData *data;
- BlockDriverState *bs = s->source;
+ BlockDriverState *bs = s->mirror_top_bs->backing->bs;
BlockDriverState *target_bs = blk_bs(s->target);
bool need_drain = true;
int64_t length;
@@ -1285,7 +1284,6 @@ static void mirror_start_job(const char *job_id,
BlockDriverState *bs,
/* The block job now has a reference to this node */
bdrv_unref(mirror_top_bs);
- s->source = bs;
s->mirror_top_bs = mirror_top_bs;
/* No resize for the target either; while the mirror is still running, a
--
2.17.1
- [Qemu-devel] [PATCH v5 00/14] block/mirror: Add active-sync mirroring, Max Reitz, 2018/06/13
- [Qemu-devel] [PATCH v5 01/14] block/mirror: Pull out mirror_perform(), Max Reitz, 2018/06/13
- [Qemu-devel] [PATCH v5 03/14] block/mirror: Use CoQueue to wait on in-flight ops, Max Reitz, 2018/06/13
- [Qemu-devel] [PATCH v5 02/14] block/mirror: Convert to coroutines, Max Reitz, 2018/06/13
- [Qemu-devel] [PATCH v5 04/14] block/mirror: Wait for in-flight op conflicts, Max Reitz, 2018/06/13
- [Qemu-devel] [PATCH v5 05/14] block/mirror: Use source as a BdrvChild,
Max Reitz <=
- [Qemu-devel] [PATCH v5 06/14] block: Generalize should_update_child() rule, Max Reitz, 2018/06/13
- [Qemu-devel] [PATCH v5 07/14] hbitmap: Add @advance param to hbitmap_iter_next(), Max Reitz, 2018/06/13
- [Qemu-devel] [PATCH v5 08/14] test-hbitmap: Add non-advancing iter_next tests, Max Reitz, 2018/06/13
- [Qemu-devel] [PATCH v5 09/14] block/dirty-bitmap: Add bdrv_dirty_iter_next_area, Max Reitz, 2018/06/13
- [Qemu-devel] [PATCH v5 10/14] block/mirror: Add MirrorBDSOpaque, Max Reitz, 2018/06/13
- [Qemu-devel] [PATCH v5 11/14] job: Add job_progress_increase_remaining(), Max Reitz, 2018/06/13
- [Qemu-devel] [PATCH v5 12/14] block/mirror: Add active mirroring, Max Reitz, 2018/06/13
- [Qemu-devel] [PATCH v5 13/14] block/mirror: Add copy mode QAPI interface, Max Reitz, 2018/06/13
- [Qemu-devel] [PATCH v5 14/14] iotests: Add test for active mirroring, Max Reitz, 2018/06/13