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block: BdrvChildClass: add .get_parent_aio_context handler

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Add new handler to get aio context and implement it in all child
classes. Add corresponding public interface to be used soon.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20210428151804.439460-6-vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2021-04-28 18:17:33 +03:00 committed by Kevin Wolf
parent ae9d441706
commit 3ca1f32257
5 changed files with 34 additions and 0 deletions
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13
block.c
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@ -1394,6 +1394,13 @@ static int bdrv_child_cb_update_filename(BdrvChild *c, BlockDriverState *base,
return 0;
}
static AioContext *bdrv_child_cb_get_parent_aio_context(BdrvChild *c)
{
BlockDriverState *bs = c->opaque;
return bdrv_get_aio_context(bs);
}
const BdrvChildClass child_of_bds = {
.parent_is_bds = true,
.get_parent_desc = bdrv_child_get_parent_desc,
@ -1407,8 +1414,14 @@ const BdrvChildClass child_of_bds = {
.can_set_aio_ctx = bdrv_child_cb_can_set_aio_ctx,
.set_aio_ctx = bdrv_child_cb_set_aio_ctx,
.update_filename = bdrv_child_cb_update_filename,
.get_parent_aio_context = bdrv_child_cb_get_parent_aio_context,
};
AioContext *bdrv_child_get_parent_aio_context(BdrvChild *c)
{
return c->klass->get_parent_aio_context(c);
}
static int bdrv_open_flags(BlockDriverState *bs, int flags)
{
int open_flags = flags;

9
block/block-backend.c
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@ -298,6 +298,13 @@ static void blk_root_detach(BdrvChild *child)
}
}
static AioContext *blk_root_get_parent_aio_context(BdrvChild *c)
{
BlockBackend *blk = c->opaque;
return blk_get_aio_context(blk);
}
static const BdrvChildClass child_root = {
.inherit_options = blk_root_inherit_options,
@ -318,6 +325,8 @@ static const BdrvChildClass child_root = {
.can_set_aio_ctx = blk_root_can_set_aio_ctx,
.set_aio_ctx = blk_root_set_aio_ctx,
.get_parent_aio_context = blk_root_get_parent_aio_context,
};
/*

8
blockjob.c
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@ -163,6 +163,13 @@ static void child_job_set_aio_ctx(BdrvChild *c, AioContext *ctx,
job->job.aio_context = ctx;
}
static AioContext *child_job_get_parent_aio_context(BdrvChild *c)
{
BlockJob *job = c->opaque;
return job->job.aio_context;
}
static const BdrvChildClass child_job = {
.get_parent_desc = child_job_get_parent_desc,
.drained_begin = child_job_drained_begin,
@ -171,6 +178,7 @@ static const BdrvChildClass child_job = {
.can_set_aio_ctx = child_job_can_set_aio_ctx,
.set_aio_ctx = child_job_set_aio_ctx,
.stay_at_node = true,
.get_parent_aio_context = child_job_get_parent_aio_context,
};
void block_job_remove_all_bdrv(BlockJob *job)

2
include/block/block.h
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@ -702,6 +702,8 @@ bool bdrv_child_can_set_aio_context(BdrvChild *c, AioContext *ctx,
GSList **ignore, Error **errp);
bool bdrv_can_set_aio_context(BlockDriverState *bs, AioContext *ctx,
GSList **ignore, Error **errp);
AioContext *bdrv_child_get_parent_aio_context(BdrvChild *c);
int bdrv_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz);
int bdrv_probe_geometry(BlockDriverState *bs, HDGeometry *geo);

2
include/block/block_int.h
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@ -789,6 +789,8 @@ struct BdrvChildClass {
bool (*can_set_aio_ctx)(BdrvChild *child, AioContext *ctx,
GSList **ignore, Error **errp);
void (*set_aio_ctx)(BdrvChild *child, AioContext *ctx, GSList **ignore);
AioContext *(*get_parent_aio_context)(BdrvChild *child);
};
extern const BdrvChildClass child_of_bds;