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blockjobs: add block_job_txn_apply function 

Simply apply a function transaction-wide.
A few more uses of this in forthcoming patches.

Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
master
John Snow 2018-03-10 03:27:39 -05:00 committed by Kevin Wolf
parent 43628d9336
commit efe4d4b7b2
1 changed files with 16 additions and 9 deletions
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25
blockjob.c
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@ -487,6 +487,19 @@ static void block_job_cancel_async(BlockJob *job)
job->cancelled = true;
}
static void block_job_txn_apply(BlockJobTxn *txn, void fn(BlockJob *))
{
AioContext *ctx;
BlockJob *job, *next;
QLIST_FOREACH_SAFE(job, &txn->jobs, txn_list, next) {
ctx = blk_get_aio_context(job->blk);
aio_context_acquire(ctx);
fn(job);
aio_context_release(ctx);
}
}
static int block_job_finish_sync(BlockJob *job,
void (*finish)(BlockJob *, Error **errp),
Error **errp)
@ -565,9 +578,8 @@ static void block_job_completed_txn_abort(BlockJob *job)
static void block_job_completed_txn_success(BlockJob *job)
{
AioContext *ctx;
BlockJobTxn *txn = job->txn;
BlockJob *other_job, *next;
BlockJob *other_job;
/*
* Successful completion, see if there are other running jobs in this
* txn.
@ -576,15 +588,10 @@ static void block_job_completed_txn_success(BlockJob *job)
if (!other_job->completed) {
return;
}
assert(other_job->ret == 0);
}
/* We are the last completed job, commit the transaction. */
QLIST_FOREACH_SAFE(other_job, &txn->jobs, txn_list, next) {
ctx = blk_get_aio_context(other_job->blk);
aio_context_acquire(ctx);
assert(other_job->ret == 0);
block_job_completed_single(other_job);
aio_context_release(ctx);
}
block_job_txn_apply(txn, block_job_completed_single);
}
/* Assumes the block_job_mutex is held */