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qed: introduce bdrv_qed_init_state 

This will be used in the next patch, which will call bdrv_qed_do_open
with a CoMutex taken.  bdrv_qed_init_state provides a nice place to
initialize it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20170629132749.997-9-pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-06-29 15:27:46 +02:00 committed by Fam Zheng
parent 61124f03ab
commit 61c7887e0f
1 changed files with 11 additions and 5 deletions
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16
block/qed.c
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@ -363,6 +363,15 @@ static void coroutine_fn bdrv_qed_co_drain(BlockDriverState *bs)
}
}
static void bdrv_qed_init_state(BlockDriverState *bs)
{
BDRVQEDState *s = bs->opaque;
memset(s, 0, sizeof(BDRVQEDState));
s->bs = bs;
qemu_co_queue_init(&s->allocating_write_reqs);
}
static int bdrv_qed_do_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
@ -371,9 +380,6 @@ static int bdrv_qed_do_open(BlockDriverState *bs, QDict *options, int flags,
int64_t file_size;
int ret;
s->bs = bs;
qemu_co_queue_init(&s->allocating_write_reqs);
ret = bdrv_pread(bs->file, 0, &le_header, sizeof(le_header));
if (ret < 0) {
return ret;
@ -507,6 +513,7 @@ static int bdrv_qed_open(BlockDriverState *bs, QDict *options, int flags,
return -EINVAL;
}
bdrv_qed_init_state(bs);
return bdrv_qed_do_open(bs, options, flags, errp);
}
@ -1462,13 +1469,12 @@ static int bdrv_qed_change_backing_file(BlockDriverState *bs,
static void bdrv_qed_invalidate_cache(BlockDriverState *bs, Error **errp)
{
BDRVQEDState *s = bs->opaque;
Error *local_err = NULL;
int ret;
bdrv_qed_close(bs);
memset(s, 0, sizeof(BDRVQEDState));
bdrv_qed_init_state(bs);
ret = bdrv_qed_do_open(bs, NULL, bs->open_flags, &local_err);
if (local_err) {
error_propagate(errp, local_err);