job: Switch transactions to JobTxn

This doesn't actually move any transaction code to Job yet, but it
renames the type for transactions from BlockJobTxn to JobTxn and makes
them contain Jobs rather than BlockJobs

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>

1 files changed, 32 insertions, 28 deletions

diff --git a/blockjob.c b/blockjob.c
index 1ed3e9c..bd35c4f 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -37,13 +37,13 @@
 #include "qemu/timer.h"
 
 /* Transactional group of block jobs */
-struct BlockJobTxn {
+struct JobTxn {
 
     /* Is this txn being cancelled? */
     bool aborting;
 
     /* List of jobs */
-    QLIST_HEAD(, BlockJob) jobs;
+    QLIST_HEAD(, Job) jobs;
 
     /* Reference count */
     int refcnt;
@@ -94,27 +94,27 @@ BlockJob *block_job_get(const char *id)
     }
 }
 
-BlockJobTxn *block_job_txn_new(void)
+JobTxn *block_job_txn_new(void)
 {
-    BlockJobTxn *txn = g_new0(BlockJobTxn, 1);
+    JobTxn *txn = g_new0(JobTxn, 1);
     QLIST_INIT(&txn->jobs);
     txn->refcnt = 1;
     return txn;
 }
 
-static void block_job_txn_ref(BlockJobTxn *txn)
+static void block_job_txn_ref(JobTxn *txn)
 {
     txn->refcnt++;
 }
 
-void block_job_txn_unref(BlockJobTxn *txn)
+void block_job_txn_unref(JobTxn *txn)
 {
     if (txn && --txn->refcnt == 0) {
         g_free(txn);
     }
 }
 
-void block_job_txn_add_job(BlockJobTxn *txn, BlockJob *job)
+void block_job_txn_add_job(JobTxn *txn, BlockJob *job)
 {
     if (!txn) {
         return;
@@ -123,14 +123,14 @@ void block_job_txn_add_job(BlockJobTxn *txn, BlockJob *job)
     assert(!job->txn);
     job->txn = txn;
 
-    QLIST_INSERT_HEAD(&txn->jobs, job, txn_list);
+    QLIST_INSERT_HEAD(&txn->jobs, &job->job, txn_list);
     block_job_txn_ref(txn);
 }
 
 void block_job_txn_del_job(BlockJob *job)
 {
     if (job->txn) {
-        QLIST_REMOVE(job, txn_list);
+        QLIST_REMOVE(&job->job, txn_list);
         block_job_txn_unref(job->txn);
         job->txn = NULL;
     }
@@ -285,18 +285,22 @@ static void job_cancel_async(Job *job, bool force)
     job->force_cancel |= force;
 }
 
-static int block_job_txn_apply(BlockJobTxn *txn, int fn(BlockJob *), bool lock)
+static int block_job_txn_apply(JobTxn *txn, int fn(BlockJob *), bool lock)
 {
     AioContext *ctx;
-    BlockJob *job, *next;
+    Job *job, *next;
+    BlockJob *bjob;
     int rc = 0;
 
     QLIST_FOREACH_SAFE(job, &txn->jobs, txn_list, next) {
+        assert(is_block_job(job));
+        bjob = container_of(job, BlockJob, job);
+
         if (lock) {
-            ctx = blk_get_aio_context(job->blk);
+            ctx = job->aio_context;
             aio_context_acquire(ctx);
         }
-        rc = fn(job);
+        rc = fn(bjob);
         if (lock) {
             aio_context_release(ctx);
         }
@@ -310,8 +314,8 @@ static int block_job_txn_apply(BlockJobTxn *txn, int fn(BlockJob *), bool lock)
 static void block_job_completed_txn_abort(BlockJob *job)
 {
     AioContext *ctx;
-    BlockJobTxn *txn = job->txn;
-    BlockJob *other_job;
+    JobTxn *txn = job->txn;
+    Job *other_job;
 
     if (txn->aborting) {
         /*
@@ -324,7 +328,7 @@ static void block_job_completed_txn_abort(BlockJob *job)
 
     /* We are the first failed job. Cancel other jobs. */
     QLIST_FOREACH(other_job, &txn->jobs, txn_list) {
-        ctx = blk_get_aio_context(other_job->blk);
+        ctx = other_job->aio_context;
         aio_context_acquire(ctx);
     }
 
@@ -332,18 +336,18 @@ static void block_job_completed_txn_abort(BlockJob *job)
      * them; this job, however, may or may not be cancelled, depending
      * on the caller, so leave it. */
     QLIST_FOREACH(other_job, &txn->jobs, txn_list) {
-        if (other_job != job) {
-            job_cancel_async(&other_job->job, false);
+        if (other_job != &job->job) {
+            job_cancel_async(other_job, false);
         }
     }
     while (!QLIST_EMPTY(&txn->jobs)) {
         other_job = QLIST_FIRST(&txn->jobs);
-        ctx = blk_get_aio_context(other_job->blk);
-        if (!job_is_completed(&other_job->job)) {
-            assert(job_is_cancelled(&other_job->job));
-            job_finish_sync(&other_job->job, NULL, NULL);
+        ctx = other_job->aio_context;
+        if (!job_is_completed(other_job)) {
+            assert(job_is_cancelled(other_job));
+            job_finish_sync(other_job, NULL, NULL);
         }
-        job_finalize_single(&other_job->job);
+        job_finalize_single(other_job);
         aio_context_release(ctx);
     }
 
@@ -385,8 +389,8 @@ static int block_job_transition_to_pending(BlockJob *job)
 
 static void block_job_completed_txn_success(BlockJob *job)
 {
-    BlockJobTxn *txn = job->txn;
-    BlockJob *other_job;
+    JobTxn *txn = job->txn;
+    Job *other_job;
 
     job_state_transition(&job->job, JOB_STATUS_WAITING);
 
@@ -395,10 +399,10 @@ static void block_job_completed_txn_success(BlockJob *job)
      * txn.
      */
     QLIST_FOREACH(other_job, &txn->jobs, txn_list) {
-        if (!job_is_completed(&other_job->job)) {
+        if (!job_is_completed(other_job)) {
             return;
         }
-        assert(other_job->job.ret == 0);
+        assert(other_job->ret == 0);
     }
 
     block_job_txn_apply(txn, block_job_transition_to_pending, false);
@@ -628,7 +632,7 @@ static void block_job_event_pending(Notifier *n, void *opaque)
  */
 
 void *block_job_create(const char *job_id, const BlockJobDriver *driver,
-                       BlockJobTxn *txn, BlockDriverState *bs, uint64_t perm,
+                       JobTxn *txn, BlockDriverState *bs, uint64_t perm,
                        uint64_t shared_perm, int64_t speed, int flags,
                        BlockCompletionFunc *cb, void *opaque, Error **errp)
 {